1. The utility model provides a detachable building sand table model, includes table (1), its characterized in that, spacing groove (11) have been seted up on the top of table (1), the bottom fixed mounting of table (1) has support elevating system (2), the bottom fixed mounting of table (1) has bellows (3), the equal activity grafting of double-phase opposite end of bellows (3) has filtering mechanism (4), spacing groove (11) internalization is pegged graft and is had transparent glass cover (5), four sides of going to the bottom of transparent glass cover (5) insert in spacing groove (11) jointly.

2. The separable type floor sand table model according to claim 1, wherein the limiting groove (11) is of a square design, the depth of the limiting groove (11) is smaller than the thickness of the table plate (1), four corners of the top end of the table plate (1) are vertically and fixedly provided with upright posts (12), two guard bars (13) are vertically and fixedly connected between every two adjacent upright posts (12), the top end of the table plate (1) is provided with a plurality of floor models (14), the bottom ends of the floor models (14) are vertically and fixedly provided with two inserting shafts (15), the top end of the table plate (1) is provided with two through holes (16) penetrating through the bottom end, the two through holes (16) have the same specification and are arranged in the limiting groove (11), the top end of the table plate (1) is provided with a plurality of inserting grooves (17), the inserting grooves (17) are arranged in pairs, the plurality of the building models (14) are movably inserted into the top end surface of the table plate (1) through two insertion shafts (15) and two corresponding parallel limiting grooves (11).

3. The separable floor sand table model as claimed in claim 2, wherein the supporting and lifting mechanism (2) comprises four shaft cylinders (21), each of the four shaft cylinders (21) is provided with a shaft rod (22), the four shaft rods (22) are respectively vertically and fixedly mounted at four corners of the bottom end of the table plate (1), the four shaft rods (22) are respectively vertically and fixedly mounted at the bottom end of the table plate (1), a circular stop block (23) is vertically and fixedly mounted at the bottom end of each of the four shaft rods (22), a reinforcing cross rod (24) is vertically and fixedly connected between the two shaft cylinders (21), two reinforcing vertical rods (25) are vertically and fixedly mounted between the two reinforcing cross rods (24), a mounting plate (26) is fixedly mounted between the two reinforcing vertical rods (25), and a lifting cylinder (27) is vertically and fixedly mounted at the top end of the mounting plate (26).

4. The separable floor sand table model as claimed in claim 3, wherein universal wheels (28) are fixedly mounted at the bottom ends of the four shaft cylinders (21), shaft cavities (29) are formed at the top ends of the four shaft cylinders (21), stop rods (210) are fixedly connected at the circle centers of the bottom ends of the four circular stoppers (23) vertically, annular grooves (211) are formed at the top ends of the four circular stoppers (23), two lubricating oil injection grooves (212) are formed at the bottoms of the four annular grooves (211) penetrating the bottoms of the corresponding circular stoppers (23), and the bottoms of the plurality of lubricating oil injection grooves (212) are arranged opposite to the outer rod wall positions of the corresponding stop rods (210).

5. The separable floor sand table model according to claim 4, wherein two opposite end surfaces of the air box (3) penetrate through an inner cavity of the air box (3) to form an air port (31), the outer side wall of the air box (3) penetrates through the air port (31) to form an insertion cavity (32), a partition plate (33) is fixedly installed in the middle of the inner cavity of the air box (3), the inner cavity of the air box (3) is divided into two air cavities through the partition plate (33), the two air cavities are respectively communicated with corresponding penetration holes (16), two motors (34) are fixedly installed at the bottom end of the air box (3) vertically, output ends of the two motors (34) penetrate and extend into the corresponding air cavities, fan blades (35) are fixedly installed at output ends of the two motors (34) vertically, and a tray (36) is fixedly installed at the center position of the bottom end of the air box (3) vertically, the bottom end circle center of the tray (36) is vertically and fixedly provided with a shaft sleeve (37), an inserted bar is movably inserted into a bottom end inner sleeve cavity of the shaft sleeve (37), and the inserted bar is fixedly connected with the output end of the lifting cylinder (27).

6. The separable type floor sand table model according to claim 5, wherein each of the two filtering mechanisms (4) comprises a fixed handle (41), the two fixed handles (41) are respectively attached to the two insertion cavities (32) on the outer side wall of the bellows (3), the side walls of the two fixed handles (41) are respectively and vertically and fixedly provided with a mounting frame (42), the two mounting frames (42) respectively penetrate through the corresponding insertion cavities (32) and are inserted into the inner cavity wall of the corresponding tuyere (31), two opposite side walls of the two mounting frames (42) are all penetrated and provided with mounting cavities (43), a filter screen (44) is fixedly mounted in each mounting cavity (43), a plurality of roller mounting seats (45) are fixedly mounted at the top ends and the bottom ends of the two mounting frames (42), and rollers (46) are rotatably mounted between the two opposite inner side walls of the roller mounting seats (45).

7. The separable type floor sand table model as claimed in claim 6, wherein a plurality of said rollers (46) positioned at the upper side are respectively in rolling contact with the top of the upper cavity of the corresponding inserting cavity (32) and the top of the upper cavity of the tuyere (31), a plurality of said rollers (46) positioned at the lower side are respectively in rolling contact with the bottom of the lower cavity of the corresponding inserting cavity (32) and the bottom of the lower cavity of the tuyere (31), and the top ends of the two said mounting frames (42) are designed in a wedge shape.

8. The separable type floor sand table model as claimed in claim 7, wherein the thickness of the four side edges of the lower bottom of the transparent glass cover (5) is consistent with the groove width of the limiting groove (11), and the top ends of the two opposite side walls of the transparent glass cover (5) are vertically and fixedly provided with the fixing blocks (51).

Background

The building sand table model is a simulated sand table used for showing the design layout condition of the building;

for example, application No.: no. 202020888612 relates to a building model sand table in the X, relates to the technical field of building exhibition, and it includes the sand table body, be provided with ya keli protection piece on the sand table body, ya keli protection piece includes roof and four curb plates, the curb plate with the junction of roof is articulated respectively, the bottom of curb plate is provided with the mounting, is adjacent be provided with the locating part between the curb plate. The utility model discloses have the effect with the folding convenient transportation of ya keli protection piece.

Based on prior art discovery, current floor sand table model height is fixed unchangeable, and the inconvenient adaptation customer of different heights observes the floor, and current floor sand table model exposes for a long time in the dust sand table model because consequently can design a large amount of slotted holes according to certain proportion emulation preparation simultaneously, exposes for a long time and deposits the clearance of the inconvenient sand table model of dirty dirt of hiding in the air easily.

Disclosure of Invention

The invention provides a separable floor sand table model, and aims to solve the problems that clients who are inconvenient to adapt to different heights observe a floor and the sand table model is inconvenient to clean due to the fact that the clients are easy to store dirt and hold dirt after being exposed in the air for a long time.

The separable floor sand table model comprises a table plate, wherein a limiting groove is formed in the top end of the table plate, a supporting and lifting mechanism is fixedly installed at the bottom end of the table plate, an air box is fixedly installed at the bottom end of the table plate, filtering mechanisms are movably inserted into two opposite ends of the air box, a transparent glass cover is movably inserted into the limiting groove, and four side edges of the lower bottom of the transparent glass cover are jointly inserted into the limiting groove.

Furthermore, the spacing groove is square in design, the groove depth of the spacing groove is smaller than the thickness of the table plate, four corners of the top of the table plate are vertically and fixedly provided with stand columns, two guard bars are vertically and fixedly connected between every two adjacent stand columns, the top of the table plate is provided with a plurality of floor models and a plurality of insertion shafts, two insertion ports are formed in the bottom of each floor model, two insertion shafts are arranged at the bottom of each floor model in a penetrating mode, two insertion ports are formed in the top of the table plate in a penetrating mode, the penetrating ports are consistent in specification and are arranged in the spacing groove, a plurality of insertion grooves are formed in the top of the table plate and are arranged in a pairwise mode, and the floor models are movably inserted into the top end face of the table plate through the two insertion shafts and the two corresponding parallel spacing grooves.

Furthermore, the supporting and lifting mechanism comprises four shaft cylinders, four shaft cylinders are arranged at the top ends of the shaft cylinders, four shaft rods are respectively and vertically and fixedly installed at four corners of the bottom end of the table plate at four corners, four circular stop blocks are respectively and fixedly installed at the bottom ends of the shaft rods, two transverse rods are fixedly connected between the shaft cylinders and are reinforced through vertical fixing, two reinforcing vertical rods are fixedly installed between the reinforcing transverse rods, a mounting plate is fixedly installed between the reinforcing vertical rods, and a lifting cylinder is fixedly installed at the top end of the mounting plate.

Furthermore, four the equal fixed mounting in bottom of a shaft section of thick bamboo has the universal wheel, four the shaft chamber has all been seted up on the top of a shaft section of thick bamboo, four the equal perpendicular fixedly connected with gag lever post in bottom centre of a circle position of circular dog, four the ring channel has all been seted up on the top of circular dog, four the tank bottom of ring channel all runs through to correspond circular dog and goes to the bottom and has seted up two lubricating oil injection grooves, and is a plurality of the tank bottom of lubricating oil injection groove all sets up with corresponding gag lever post outer pole wall position relatively.

Further, the double-phase opposite terminal surface of bellows all runs through the bellows inner chamber and has seted up the wind gap, the lateral wall of bellows all runs through the wind gap and has seted up the plug cavity, the inner chamber middle part fixed mounting of bellows has the baffle, cuts apart into two wind chambeies, two through the baffle with the inner chamber of bellows wind chamber respectively with the corresponding through-hole intercommunication setting, the perpendicular fixed mounting in bottom of bellows has two motors, two the output of motor all runs through and extends to corresponding in the wind chamber, two the equal perpendicular fixed mounting of motor output has the flabellum, the equal perpendicular fixed mounting in bottom central point position of bellows has the tray, the perpendicular fixed mounting in bottom centre of a circle position of tray has the axle sleeve, the movable inserted rod in the bottom inner jacket chamber of axle sleeve, the output fixed connection of inserted rod and lift cylinder.

Furthermore, two filtering mechanism all includes fixed handle, two fixed handle is attached respectively in two of bellows lateral wall insert the chamber department, two the equal perpendicular fixed mounting of lateral wall of fixed handle has the installing frame, two the installing frame runs through respectively and corresponds to insert the chamber and insert in the wind gap inner chamber wall that corresponds, two the installing frame is double-phase all run through to the lateral wall and has seted up the installing chamber, two equal fixed mounting has the filter screen in the installing chamber, two the top and the equal fixed mounting in bottom of installing frame have a plurality of gyro wheel mount pads, and is a plurality of gyro wheel mount pad double-phase is all rotated and is installed the gyro wheel between the inside wall.

Furthermore, the rollers positioned above are respectively in rolling contact with the tops of the upper cavities corresponding to the inserting cavities and the air openings, the rollers positioned below are respectively in rolling contact with the bottoms of the lower cavities corresponding to the inserting cavities and the air openings, and the top ends of the two mounting frames are in a wedge-shaped design.

Furthermore, the thicknesses of four side edges of the lower bottom of the transparent glass cover are consistent with the width of the limiting groove, and the top ends of two opposite side walls of the transparent glass cover are vertically and fixedly provided with fixing blocks.

Compared with the prior art, the invention has the following beneficial effects:

A：

the device considers that the height of the existing floor sand table model is fixed and not changed, and is inconvenient to adapt to clients with different heights to observe the floor model, so that the lifting cylinder is arranged at the bottom end of the table plate and can lift and adjust the whole height of the table plate, and further the height of the sand table model movably inserted on the table plate is lifted and adjusted, so that the clients with different heights can conveniently observe the floor model;

B：

the sand table model is exposed in the dust for a long time because of according to a large amount of slotted holes of consequently can designing according to certain proportion emulation preparation in this device consideration current building sand table model, expose for a long time and hide the clearance of the inconvenient sand table model of dirty scale of holding in the air, consequently, the spacing groove has been seted up on the table top, the activity of spacing inslot has inserted the clear glass cover, under the prerequisite that does not influence the customer and observe the building sand table, avoid dust impurity and foreign matter to pollute the sand table model, and then be favorable to the long-term use of sand table model.

Drawings

Fig. 1 is a schematic overall structure diagram of a separable floor sand table model provided by the invention;

FIG. 2 is an enlarged schematic structural view of a separable floor sand table model A provided by the invention;

fig. 3 is a schematic view of a structure for installing a separable type building sand table model according to the present invention;

fig. 4 is a schematic structural diagram of a floor model of a separable floor sand table model provided by the invention;

FIG. 5 is a schematic view of a mounting structure of a circular stopper of a separable type floor sand table model according to the present invention;

FIG. 6 is a schematic structural view of a circular block of a separable type floor sand table model provided by the invention;

FIG. 7 is a schematic view of the installation structure of bellows of a separable floor sand table model according to the present invention;

fig. 8 is a schematic structural diagram of a filter mechanism of a separable floor sand table model provided by the invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a table plate; 11. a limiting groove; 12. a column; 13. a guard bar; 14. a building model; 15. inserting a shaft; 16. a through opening; 17. a slot;

2. a supporting lifting mechanism; 21. a shaft cylinder; 22. a shaft lever; 23. a circular stopper; 24. reinforcing the cross bar; 25. reinforcing the vertical rod; 26. mounting a plate; 27. a lifting cylinder; 28. a universal wheel; 29. a shaft cavity; 210. a limiting rod; 211. an annular groove; 212. lubricating oil injection grooves;

3. an air box; 31. a tuyere; 32. inserting a cavity; 33. a partition plate; 34. a motor; 35. a fan blade; 36. a tray; 37. a shaft sleeve;

4. a filtering mechanism; 41. fixing a handle; 42. installing a frame; 43. a mounting cavity; 44. a filter screen; 45. a roller mounting seat; 46. a roller;

5. a transparent glass cover; 51. and (5) fixing blocks.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

As shown in figure 1: the utility model provides a detachable building sand table model, including table 1, spacing groove 11 has been seted up on the top of table 1, the bottom fixed mounting of table 1 supports elevating system 2, the bottom fixed mounting of table 1 has bellows 3, it is separable to support elevating system 2 and bellows 3, make things convenient for the dismantlement maintenance in later stage, and dismantlement during the transportation is stacked, the equal activity of two relative tip of bellows 3 is pegged graft and is had filtering mechanism 4, spacing groove 11 internalization is pegged graft and is had transparent glass cover 5, four sides of going to the bottom of transparent glass cover 5 insert the spacing inslot 11 jointly.

Wherein, the limiting groove 11 is designed in a square shape, the depth of the limiting groove 11 is smaller than the thickness of the table board 1 and can not penetrate through, otherwise, the middle part of the table board 1 sinks, the four corners at the top end of the table board 1 are vertically and fixedly provided with the upright posts 12, two protective rods 13 are vertically and fixedly connected between every two adjacent upright posts 12, the protective rods 13 are used for some customers to watch, and play a certain protection and isolation effect, the top end of the table board 1 is provided with a plurality of floor models 14, the bottom ends of the floor models 14 are vertically and fixedly provided with two inserting shafts 15, the top penetrating bottom end of the table board 1 is provided with two penetrating ports 16, the two penetrating ports 16 are respectively communicated with the two air cavities of the air box 3 to form an air flow path line, the two penetrating ports 16 are consistent in specification and are both arranged in the limiting groove 11, the top end of the table board 1 is provided with a plurality of inserting grooves 17, the plurality of slots 17 are arranged in parallel, the plurality of the building models 14 are movably inserted into the top end face of the table plate 1 through the two inserting shafts 15 and the two corresponding parallel limiting grooves 11, the separable characteristic of the building models 14 is realized through the inserting form of the inserting shafts 15 and the slots 17, the purpose is that the building models 14 can be conveniently repaired and replaced after being detached and can be conveniently maintained and cleaned daily, and the building models 14 can be ensured to be used for a long time.

Wherein, a plurality of gyro wheels 46 that are located the top roll contact with the upper chamber top that corresponds to insert chamber 32 and wind gap 31 respectively, a plurality of gyro wheels 46 that are located the below roll contact with the lower chamber bottom that corresponds to insert chamber 32 and wind gap 31 respectively, this is also exactly gyro wheel 46's design purpose, just in order to reduce the sliding friction resistance when installing frame 42 inserts wind gap 31, utilize the characteristic that gyro wheel 46 freely rolls, can labour saving and time saving raise the efficiency, the top of two installing frames 42 all becomes wedge design, this is that the end of installing frame 42 is inserted fast and is inserted chamber 32 and design for the convenience.

The thicknesses of the four sides of the lower bottom of the transparent glass cover 5 are consistent with the groove width of the limiting groove 11, the top ends of the two opposite side walls of the transparent glass cover 5 are vertically and fixedly provided with the fixing blocks 51, good sealing performance is guaranteed, dust and sundries cannot affect the floor model 14, meanwhile, the dust and the sundries are prevented from falling into the limiting groove 11, and the limiting groove 11 is prevented from being not tightly contacted with the transparent glass cover 5.

Example two

As shown in fig. 5 to 6:

firstly, the supporting and lifting mechanism 2 comprises four shaft cylinders 21, the top ends of the four shaft cylinders 21 are all provided with shaft rods 22, the top ends of the four shaft rods 22 are respectively vertically and fixedly installed at four corners of the bottom end of the table plate 1, the bottom ends of the four shaft rods 22 are all vertically and fixedly installed with circular stop blocks 23, the circular stop blocks 23 play a role of limiting and supporting, when the lifting cylinder 27 is not needed, the four shaft rods 22 are stressed at the moment by utilizing the limiting of the circular stop blocks 23 to support the whole sand table model, the two shaft cylinders 21 are all vertically and fixedly connected with reinforcing transverse rods 24, the two reinforcing vertical rods 25 are vertically and fixedly installed between the two reinforcing transverse rods 24, the mounting plate 26 is fixedly installed between the two reinforcing vertical rods 25, the lifting cylinder 27 is vertically and fixedly installed at the top end of the mounting plate 26, the shaft sleeve 37 can be pushed by utilizing the inserted rod by starting the lifting cylinder 27, and the top ends of the inserted rods are movably inserted in the inner cavity of the shaft sleeve 37, therefore, the separation of the supporting lifting mechanism 2 and the air box 3 can be realized, the maintenance, the replacement and the daily maintenance are also convenient, the integral height of the air box 3 and the table plate 1 can be adjusted in a lifting way, and the height of the floor model 14 movably inserted on the table plate 1 is adjusted in a lifting way, so that customers with different heights can conveniently observe the floor model 14;

secondly, considering that the appearance of the building observed by the client needs to move around the sand table, the observation efficiency is reduced, so that universal wheels 28 are fixedly arranged at the bottom ends of the four shaft cylinders 21, the client can watch the appearance of the whole building by 360 degrees on the premise of keeping the client motionless by directly rotating the table plate 1, and the observation efficiency is improved; the top ends of the four shaft cylinders 21 are respectively provided with a shaft cavity 29, the circle centers of the bottom ends of the four circular stoppers 23 are vertically and fixedly connected with limiting rods 210, and the four limiting rods 210 are respectively and movably inserted into the corresponding shaft cavities 29, so that the problem of unstable lifting is further considered when the lifting cylinder 27 pushes the table plate 1 to lift, and the stability of lifting driving of the lifting cylinder 27 is improved by utilizing the form that the four fixed shaft cylinders 21 and the four limiting rods 210 are mutually inserted;

finally, the top ends of the four circular stoppers 23 are all provided with annular grooves 211, the bottoms of the four annular grooves 211 penetrate through the lower bottoms of the corresponding circular stoppers 23 and are provided with two lubricating oil injection grooves 212, the bottoms of the plurality of lubricating oil injection grooves 212 are all arranged opposite to the outer rod walls of the corresponding limiting rods 210, so that the annular grooves 211 are formed in the circular stoppers 23 in consideration of frequent sliding friction between long-term lifting adjustment of the four limiting rods 210 and the inner cavity wall of the corresponding shaft cavity 29, and the bottoms of the annular grooves 211 penetrate through the lower bottoms of the corresponding circular stoppers 23 and are provided with the two lubricating oil injection grooves 212;

EXAMPLE III

As shown in fig. 7 to 8:

firstly, two opposite end surfaces of the air box 3 penetrate through an inner cavity of the air box 3 to form an air opening 31, the outer side wall of the air box 3 penetrates through the air opening 31 to form an inserting cavity 32, a partition plate 33 is fixedly arranged in the middle of the inner cavity of the air box 3, the inner cavity of the air box 3 is divided into two air cavities through the partition plate 33, the two air cavities are respectively communicated with corresponding penetrating openings 16, two motors 34 are vertically and fixedly arranged at the bottom end of the air box 3, output ends of the two motors 34 penetrate through and extend into the corresponding air cavities, and output ends of the two motors 34 are vertically and fixedly arranged with fan blades 35, so that once the transparent glass cover 5 is covered and buckled to isolate dust and sundries from polluting the floor model 14, but long-term sealing can lead the air in the transparent glass cover 5 to be turbid and generate peculiar smell, and also can influence the floor model 14, therefore, the air openings 31 are formed at the two ends of the air box 3, and the two air cavities are ensured to be communicated with the inner space of the transparent glass cover 5, therefore, when the fan blade 35 is driven by the motor 34 to introduce external air flow into the air cavity from the air port 31 and discharge the air flow into the internal space of the transparent glass cover 5, turbid odor air in the transparent glass cover 5 can be discharged into another air cavity again, and the fan blade 35 is driven by the motor 34 to discharge the turbid odor air in the air cavity again, so that smooth air paths are ensured, the center position of the bottom end of the air box 3 is vertically and fixedly provided with the tray 36, the circle center position of the bottom end of the tray 36 is vertically and fixedly provided with the shaft sleeve 37, the inner sleeve cavity at the bottom end of the shaft sleeve 37 is movably inserted with the inserted rod, and the inserted rod is fixedly connected with the output end of the lifting cylinder 27, so that the movable disassembly of the lifting mechanism 2 is facilitated;

secondly, considering that the airflow introduced at one end is easy to introduce the external airflow into the internal space of the transparent glass cover 5 again to affect the building model 14, the two filtering mechanisms 4 respectively comprise fixed handles 41, the two fixed handles 41 are respectively attached to the two insertion cavities 32 on the outer side wall of the bellows 3, the side walls of the two fixed handles 41 are respectively and fixedly provided with installation frames 42 vertically, the two installation frames 42 respectively penetrate through the corresponding insertion cavities 32 to be inserted into the inner cavity walls of the corresponding air ports 31, the two opposite side walls of the two installation frames 42 are respectively provided with installation cavities 43 in a penetrating manner, the two installation cavities 43 are respectively and fixedly provided with filter screens 44, dust and sundries can be prevented from entering the air ports 31 through the filter screens 44, and the installation frames 42 are movably inserted so that the installation frames 42 can be conveniently taken down from the air ports 31 and the filter screens 44 can;

finally, considering that the mounting frames 42 are movably inserted into the tuyere 31 and slide and rub with the walls of the insertion cavity 32 and the tuyere 31, the sliding friction force is large, and the problem of easy abrasion is solved, therefore, a plurality of roller mounting seats 45 are fixedly mounted at the top ends and the bottom ends of the two mounting frames 42, rollers 46 are rotatably mounted between the two opposite inner side walls of the roller mounting seats 45, the rollers 46 are used for replacing the upper top and the lower bottom of the mounting frames 42 to contact with the upper top and the lower bottom of the insertion cavity 32 and the tuyere 31, and further, the labor and the abrasion can be saved and reduced.

Principle of operation

The installation step:

firstly, the shaft sleeve 37 at the bottom end of the air box 3 is movably inserted on the output end inserted rod of the lifting cylinder 27, and the four limit rods 210 are ensured to be movably inserted in the corresponding shaft cavities 29 all the time in the insertion process,

then the two inserting shafts 15 at the bottom end of the building model 14 are respectively movably inserted into the corresponding inserting grooves 17, the stability of the building model 14 is improved,

finally, the transparent glass cover 5 is covered and buckled in the limiting groove 11 at the top end of the table plate 1 through the two fixing blocks 51, so that the transparent glass cover 5 isolates and protects the floor model 14, and the floor model 14 is prevented from being influenced by dust and sundries;

the working steps are as follows:

firstly, two motors 34 are started to respectively drive the two fan blades 35 to rotate, wherein the rotation directions of the two fan blades 35 are opposite, because one fan blade introduces outside air flow into an air cavity, and the other fan blade exhausts turbid odor air in the air cavity, the outside air flow is introduced into the air cavity from an air port 31 through the rotation drive of the two fan blades 35, and after the outside air flow is exhausted into the inner space of the transparent glass cover 5, the turbid odor air in the transparent glass cover 5 is exhausted into the other air cavity again, and the turbid odor air in the air cavity is exhausted again through the driving of the motor 34 and the fan blades 35, so that an air path is ensured to be smooth;

secondly, according to the customer of different heights, can adjust the height of table 1 that is a plurality of building models 14 through the mode that starts lift cylinder 27, conveniently observe, specific operating procedure is as follows:

the first step is as follows: the lifting cylinder 27 is started to push the shaft sleeve 37 by using the inserted rod, and the top end of the inserted rod is movably inserted into the inner cavity of the lower bottom of the shaft sleeve 37, so that the separation of the supporting lifting mechanism 2 and the air box 3 can be realized, the maintenance, the replacement and the daily maintenance are convenient, the integral height of the air box 3 and the table plate 1 can be adjusted in a lifting way, the height of the floor model 14 movably inserted on the table plate 1 is adjusted in a lifting way, and therefore, customers with different heights can conveniently observe the floor model 14;

the second step is that: considering that the appearance of the building observed by the client needs to move around the sand table, the observation efficiency is reduced, so that universal wheels 28 are fixedly mounted at the bottom ends of the four shaft cylinders 21, the appearance of the whole building can be observed by 360 degrees on the premise that the client keeps still by directly rotating the table plate 1, and the observation efficiency is improved; the top ends of the four shaft cylinders 21 are respectively provided with a shaft cavity 29, the circle centers of the bottom ends of the four circular stoppers 23 are vertically and fixedly connected with limiting rods 210, and the four limiting rods 210 are respectively and movably inserted into the corresponding shaft cavities 29, so that the problem of unstable lifting is further considered when the lifting cylinder 27 pushes the table plate 1 to lift, and the stability of lifting driving of the lifting cylinder 27 is improved by utilizing the form that the four fixed shaft cylinders 21 and the four limiting rods 210 are mutually inserted;

and (3) maintenance:

firstly, the building model 14 is cleaned, the transparent glass cover 5 can be taken down through the fixed block 51, and then the inserting shafts 15 at the bottom end of the building model 14 are respectively pulled out from the corresponding inserting grooves 17, so that the building model 14 can be cleaned in a separable way;

secondly, the four limiting rods 210 are maintained, the operation method is that lubricating oil is injected into the annular groove 211, and the lubricating oil naturally flows down to the outer rod walls of the limiting rods 210 through the lubricating oil injection groove 212 due to gravity, so that the purpose of lubricating and reducing abrasion is achieved;

finally, the two filter screens 44 are cleaned, the operation method is that the two fixed handles 41 are respectively held, then the corresponding mounting frame 42 is extracted, in the extraction process, the plurality of rollers 46 are in rolling contact with the upper cavity top and lower cavity bottom of the corresponding insertion cavity 32 and the upper cavity top and lower cavity bottom of the air port 31 again, the mounting frame 42 is convenient to take out, and the two filter screens 44 are respectively embedded and fixedly mounted in the mounting cavities 43 of the corresponding mounting frames 42, so that the two filter screens 44 are taken out together, and dust and impurities accumulated at the mesh holes are convenient to clean.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.