1. The utility model provides a detonating bullet automatic transportation filling mechanism which characterized in that: comprises a base (1), an explosive conveying component and a detonating bullet conveying component; the explosive conveying assembly and the detonation bomb conveying assembly are respectively connected with the tunnel rock body (2) through conveying pipelines and are used for respectively conveying explosives and detonation bombs into the tunnel rock body (2); the explosive conveying assembly and the initiating bomb conveying assembly are both arranged on the base (1), so that transfer of the automatic initiating bomb transporting and filling mechanism is achieved.

2. The automatic transfer priming mechanism of a detonating cartridge as claimed in claim 1, characterized in that: the explosive conveying assembly comprises an explosive conveying pipe (3) and a clamping conveying assembly (4), one end of the explosive conveying pipe (3) is connected with an explosive device, and the other end of the explosive conveying pipe extends into a section blast hole of the tunnel rock body (2) through a conveying pipeline and is used for conveying explosives into the section blast hole of the tunnel rock body (2); the clamping and conveying assembly (4) is used for clamping and fixing the medicine conveying pipe (3).

3. The automatic transfer priming mechanism of a detonating cartridge as claimed in claim 2, characterized in that: the clamping conveying assembly (4) comprises a driving motor (401), a driving connecting piece, an upper clamping assembly and a lower clamping assembly, wherein the driving end of the driving motor (401) is connected with the upper clamping assembly and the lower clamping assembly through the driving connecting piece at the same time, and is used for driving the upper clamping assembly and the lower clamping assembly to clamp the medicine conveying pipe (3) for conveying or returning.

4. The automatic transfer priming mechanism of claim 3, wherein: the driving connecting piece comprises a driving shaft (402), and a first driving wheel (403) and a second driving wheel (404) which are arranged on the driving shaft (402), wherein the driving shaft (402) is arranged on the driving end of the driving motor (401), and the first driving wheel (403) and the second driving wheel (404) are arranged in parallel in the vertical direction;

the upper clamping assembly comprises a first driven wheel (405), a second driven wheel (406) and a first clamping piece (407), wherein the first driven wheel (405) is in meshed connection with the first driving wheel (403) and is connected with the second driven wheel (406) through the first clamping piece (407) so as to move through the driving of the driving motor (401);

the lower clamping assembly comprises a third driven wheel (408), a fourth driven wheel (409) and a second clamping piece (410), the third driven wheel (408) is meshed with the second driving wheel (404) and is connected with the fourth driven wheel (409) through the second clamping piece (410) so as to move under the driving of a driving motor (401), and clamping and conveying of the medicine conveying pipe (3) are achieved through the matching of the upper clamping assembly.

5. The automatic transfer priming mechanism of a detonating cartridge as claimed in claim 1, characterized in that: the detonation cartridge conveying component comprises a compressed air conveying pipe (5), a detonation cartridge storage component (6) and a detonation cartridge conveying pipe (7); one end of the compressed air conveying pipe (5) is connected with the air compression device, and the other end of the compressed air conveying pipe is connected with the detonation bomb storage assembly (6) and used for conveying the detonation bombs in the detonation bomb storage assembly (6) into the detonation bomb conveying pipe (7); one end of the detonation bomb conveying pipe (7) is connected with the detonation bomb storage assembly (6), and the other end of the detonation bomb conveying pipe extends to a section blast orifice of the tunnel rock body (2) through a conveying pipeline and is used for conveying the detonation bomb into the section blast orifice of the tunnel rock body (2).

6. The automatic transfer priming mechanism of claim 5, wherein: the detonation cartridge storage assembly (6) comprises a detonation cartridge bin (601) and a displacement assembly for driving the compressed air conveying pipe (5) and the detonation cartridge conveying pipe (7) to simultaneously displace;

the detonation cartridge magazine (601) is of a structure which is partitioned into at least one cavity through partition plates and is used for separately storing different detonation cartridges;

the displacement subassembly includes conveyer pipe mounting panel (602), slides drive (603) and slide guide (604), the one end of conveyer pipe mounting panel (602) is connected with the drive end of sliding drive (603), and the other end is connected with compressed air conveyer pipe (5) and detonating bullet conveyer pipe (7) simultaneously for drive through sliding drive (603) drives compressed air conveyer pipe (5) and detonating bullet conveyer pipe (7) and carries out the displacement on slide guide (604).

7. The automatic transfer priming mechanism of a detonating cartridge as claimed in any one of claims 1 to 6, characterized in that: a counter (9) for detecting the number of the detonation bombs is also arranged on the conveying pipeline; the counter (9) is arranged as a proximity switch.

8. The automatic transfer priming mechanism of claim 7, wherein: the explosive transfer assembly is characterized by further comprising a transfer assembly (8), wherein the transfer assembly (8) is used for communicating the explosive transfer assembly with the section blast holes of the tunnel rock body (2) or communicating the explosive transfer assembly with the section blast holes of the tunnel rock body (2).

9. The automatic transfer priming mechanism of claim 8, wherein: the conversion assembly (8) comprises a first pipeline (801), a conversion disc (802), a conversion drive (803), a second pipeline (804) and a conversion seat (805); the first pipeline (801) and the second pipeline (804) are respectively arranged on a conversion disc (802), the conversion disc (802) is connected with the driving end of a conversion drive (803), so that the first pipeline (801) and the second pipeline (804) are controlled to perform position conversion through the drive of the conversion drive (803); the conversion drive (803) is arranged on the conversion seat (805) and is connected with the base (1) through the conversion seat (805).

10. A construction method for automatically transporting and filling a detonation cartridge, which is characterized in that the specific steps of filling the detonation cartridge by using the mechanism for automatically transporting and filling the detonation cartridge of any one of claims 1 to 9 are as follows:

step 1, preparation step: installing a detonation bomb automatic transportation and loading mechanism and a detonation bomb, and transporting the detonation bomb automatic transportation and loading mechanism to be aligned with a section blast hole of the tunnel rock body (2);

step 2, conveying the detonation bomb: conveying the detonation bomb into a second pipeline (804) of the conversion assembly (8) through the detonation bomb conveying assembly, starting the conversion assembly (8) to realize transposition so that the second pipeline (804) is communicated with the conveying pipeline, starting the clamping conveying assembly (4) to rotate forwards, and pushing the detonation bomb into a section blast hole of the tunnel rock body (2) through the explosive conveying pipe (3);

step 3, conveying explosives: after the explosive conveying pipe (3) pushes the initiating bomb to the bottom of the section blast hole of the tunnel rock body (2), the clamping conveying assembly (4) reverses, and the explosive is conveyed simultaneously in the process of driving the explosive conveying pipe (3) to return;

and 4, resetting the conversion assembly (8) to finish the filling of the explosive and the detonating cartridge.

Background

The priming process of the initiating bomb is that in the drilling and blasting construction process, after the construction section completes the drilling process, the initiating bomb is pushed to the bottom of the hole to carry out the emulsion explosive charging process. At present, the method for filling the detonating bullet mainly adopts a manual filling mode, an artificial rack and an overhead working truck are used as a platform, after the blast hole is cleaned (the part is added subsequently, the blast hole cleaning is the foundation for filling the detonating bullet and can not be impacted by extrusion), the detonating bullet at different section positions is pushed into the blast hole at the corresponding section position through insulating long sticks such as a bamboo pole and a wood stick, and the pushing process is careful to avoid excessive extrusion.

At present, the explosive charging construction mainly adopts manual explosive charging, and the specific steps of the explosive charging operation of the initiating bomb are as follows: firstly, a charge constructor sets up a manual rack or an overhead working truck to enter a field and transports a primary explosive bomb into the rack or the overhead working truck; secondly, the personnel cooperate with the overhead working truck or the manual rack to manually place the detonating projectile into the blast hole firstly; pushing a gun rod (bamboo pole or PVC pipe) into the hole, wherein the gun rod needs to exert uniform force in the charging process and cannot impact; and step four, completing single-hole filling, selecting the initiating bomb of the next hole according to the type of the blast hole for filling, and performing circulating operation.

The manual charging and the priming bullet filling operation have the following defects: 1. the method is characterized in that a detonation bomb is filled manually, more than ten people are needed mostly, and more workers are needed; 2. the process is complex, the type of the detonation bomb needs to be determined according to the section position for selecting the type of the detonation bomb, and the working efficiency is low; 3. the manual rack erection has the advantages of multiple filling times, large workload, high labor intensity of constructors and low safety; 4. the time for the trolley to transfer to the field and the high-altitude operation equipment to enter the field is long, water and electricity are disassembled and connected for many times, the subsequent procedures are delayed, and the construction cost is high.

The invention provides an automatic conveying and filling mechanism of a detonation bomb and a construction method thereof, aiming at the problems, the automatic conveying and filling mechanism of the detonation bomb and the construction method thereof are used for mechanically filling the detonation bomb by automatically selecting and conveying the detonation bomb and matching with a mixed explosive loading vehicle.

Disclosure of Invention

The invention aims to provide an automatic conveying and filling mechanism for detonation shells and a construction method thereof, aiming at the defects of the prior art, wherein the automatic conveying and filling mechanism is used for mechanically filling the detonation shells by automatically selecting and conveying the detonation shells and matching with a mixed explosive loading vehicle.

In order to achieve the aim, the invention provides an automatic conveying and filling mechanism for a detonating cartridge, which comprises a base, an explosive conveying assembly and a detonating cartridge conveying assembly; the explosive conveying assembly and the detonation bomb conveying assembly are respectively connected with the tunnel rock body through conveying pipelines and are used for respectively conveying explosives and detonation bombs into the tunnel rock body; the explosive conveying assembly and the initiating bomb conveying assembly are both arranged on the base, so that transfer of the initiating bomb automatic conveying and filling mechanism is achieved.

The explosive conveying assembly comprises an explosive conveying pipe and a clamping conveying assembly, one end of the explosive conveying pipe is connected with the explosive device, and the other end of the explosive conveying pipe extends into the section blast hole of the tunnel rock body through a conveying pipeline and is used for conveying the explosive into the section blast hole of the tunnel rock body; the clamping and conveying assembly is used for clamping and fixing the medicine conveying pipe.

The clamping conveying assembly comprises a driving motor, a driving connecting piece, an upper clamping assembly and a lower clamping assembly, wherein the driving end of the driving motor is connected with the upper clamping assembly and the lower clamping assembly through the driving connecting piece at the same time and is used for driving the upper clamping assembly and the lower clamping assembly to clamp the medicine conveying pipe for conveying or returning.

The drive connecting piece includes the drive shaft and installs first drive wheel and the second drive wheel in the drive shaft, and the drive shaft is installed on drive motor's drive end, and first drive wheel and second drive wheel set up with vertical direction side by side.

Preferably, the upper clamping assembly comprises a first driven wheel, a second driven wheel and a first clamping piece, wherein the first driven wheel is in meshed connection with the first driving wheel and is connected with the second driven wheel through the first clamping piece so as to move through the driving of the driving motor.

Preferably, the lower clamping assembly comprises a third driven wheel, a fourth driven wheel and a second clamping piece, the third driven wheel is meshed with the second driving wheel and is connected with the fourth driven wheel through the second clamping piece so as to move under the driving of the driving motor, and the clamping and conveying of the medicine conveying pipe are realized through the matching of the upper clamping assembly.

The detonation cartridge conveying assembly comprises a compressed air conveying pipe, a detonation cartridge storage assembly and a detonation cartridge conveying pipe; one end of the compressed air conveying pipe is connected with the air compression device, and the other end of the compressed air conveying pipe is connected with the detonation cartridge storage assembly and used for conveying the detonation cartridges in the detonation cartridge storage assembly into the detonation cartridge conveying pipe; one end of the detonation bomb conveying pipe is connected with the detonation bomb storage assembly, and the other end of the detonation bomb conveying pipe extends to a section blast hole orifice of the tunnel rock body through a conveying pipeline and is used for conveying the detonation bomb into the section blast hole of the tunnel rock body.

The detonation cartridge storage assembly comprises a detonation cartridge bin and a displacement assembly used for driving the compressed air delivery pipe and the detonation cartridge delivery pipe to displace simultaneously.

Preferably, the detonation cartridge magazine is provided with a structure which is partitioned into at least one cavity by a partition plate, and is used for separately storing different detonation cartridges.

Preferably, the displacement subassembly includes the conveyer pipe mounting panel, slides the drive and the guide rail that slides, the one end and the drive end of the drive that slides of conveyer pipe mounting panel are connected, and the other end simultaneously with compressed air conveyer pipe and detonation bomb duct connection for drive compressed air conveyer pipe and detonation bomb conveyer pipe carry out the displacement on the guide rail that slides through the drive that slides.

As a further scheme of the invention: and a counter for detecting the number of the detonating cartridges is also arranged on the conveying pipeline.

Preferably, the counter is provided as a proximity switch.

As a further scheme of the invention: the automatic conveying and loading mechanism for the initiating bomb further comprises a conversion assembly, wherein the conversion assembly is used for communicating the explosive conveying assembly with the section blast holes of the tunnel rock body or communicating the initiating bomb conveying assembly with the section blast holes of the tunnel rock body.

Preferably, the conversion assembly comprises a first pipeline, a conversion disc, a conversion drive, a second pipeline and a conversion seat; the first pipeline and the second pipeline are respectively arranged on a conversion disc, and the conversion disc is connected with a driving end of a conversion drive so as to control the first pipeline and the second pipeline to carry out position conversion through the drive of the conversion drive; the conversion drive is arranged on the conversion seat and is connected with the base through the conversion seat.

As a further scheme of the invention, the specific steps of filling the initiating bomb by using the automatic initiating bomb transporting and filling mechanism are as follows:

step 1, preparation step: installing an automatic detonation bomb transporting and loading mechanism and a detonation bomb, and transporting the automatic detonation bomb transporting and loading mechanism to be aligned with a section blast hole of a tunnel rock body;

step 2, conveying the detonation bomb: conveying the initiating bomb into a second pipeline of the conversion assembly through the initiating bomb conveying assembly, starting the conversion assembly to realize transposition to enable the second pipeline to be communicated with the conveying pipeline, starting the clamping conveying assembly to rotate forwards, and pushing the initiating bomb into a section blast hole of a tunnel rock body through a explosive conveying pipe;

step 3, conveying explosives: after the explosive conveying pipe pushes the initiating bomb to the bottom of a section blast hole of a tunnel rock body, the clamping conveying assembly reverses to drive the explosive conveying pipe to return and convey the explosive simultaneously;

and 4, resetting the conversion assembly to finish the filling of the explosive and the detonating cartridge.

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

(1) the invention can automatically load the initiating bomb to the hole bottom for explosive loading operation by matching with the on-site explosive mixing vehicle, thereby greatly reducing the cost of explosive loading construction, reducing the labor cost and improving the construction safety.

(2) The lifting device is aligned with the section blast hole of the tunnel rock mass, so that the labor intensity of manual hole alignment is effectively reduced.

(3) According to the invention, the compressed air is adopted to convey the detonation bomb, so that the time for manual transportation is reduced, the distance between an operator and the cross section of the tunnel rock body is effectively ensured, and the safety coefficient of the operator is improved.

(4) According to the invention, the switching assembly is arranged to separate the hole probing process, the pre-charging process and the initiating bomb transporting process, so that the process of taking out the initiating bomb when the hole blocking problem occurs is reduced, the working time is reduced, the working safety is improved, and the operability of the charging process is improved.

(5) According to the invention, the explosive and the detonating cartridge are automatically conveyed into the tunnel rock body through the clamping conveying assembly, so that the automation degree of the priming cartridge filling is improved, and the safety of operators is effectively ensured.

(6) According to the invention, the detonation cartridge cabin is arranged into a structure with a plurality of cavities separated by the partition plates, so that the detonation cartridges can be separately loaded as required.

(7) According to the invention, the counter is arranged to automatically count the number of the conveyed detonating cartridges, so that multi-charge or neglected charge is prevented.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is an axial schematic view of the overall structure of the present invention;

FIG. 2 is a schematic front view of the clamping and delivery assembly of the present invention shown hidden in the housing;

FIG. 3 is an isometric view of the primary cartridge storage assembly of the present invention;

FIG. 4 is an axial schematic view of the conversion assembly of the present invention.

Wherein:

1. the device comprises a base, 2, a tunnel rock body, 3, a explosive conveying pipe, 4, a clamping conveying assembly, 401, a driving motor, 402, a driving shaft, 403, a first driving wheel, 404, a second driving wheel, 405, a first driven wheel, 406, a second driven wheel, 407, a first clamping piece, 408, a third driven wheel, 409, a fourth driven wheel, 410, a second clamping piece, 5, a compressed air conveying pipe, 6, a detonating bullet storage assembly, 601, a detonating bullet cabin, 602, a conveying pipe mounting plate, 603, a sliding driving device, 604, a sliding guide rail, 7, a detonating bullet conveying pipe, 8, a conversion assembly, 801, a first pipeline, 802, a conversion disk, 803, a conversion driving device, 804, a second pipeline, 805, a conversion seat, 9 and a counter.

Detailed Description

In order to make the aforementioned objects, features, advantages, and the like of the present invention more clearly understandable, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the drawings of the present invention are simplified and are not to precise scale, and are provided for convenience and clarity in assisting the description of the embodiments of the present invention; the several references in this disclosure are not limited to the particular numbers in the examples of the figures; the directions or positional relationships indicated by ' front ' middle, ' rear ' left ', right ', upper ', lower ', top ', bottom ', middle ', etc. in the present invention are based on the directions or positional relationships shown in the drawings of the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction, nor should be construed as limiting the present invention.

The utility model discloses a:

referring to fig. 1, the automatic conveying and loading mechanism for the detonation shells provided by the invention comprises a base 1, an explosive conveying assembly and a detonation shell conveying assembly, wherein the explosive conveying assembly and the detonation shell conveying assembly are respectively connected with a tunnel rock body 2 through conveying pipelines and are used for respectively conveying explosives and the detonation shells into the tunnel rock body 2; the base 1 is connected with the explosive conveying assembly and the initiating bomb conveying assembly and is used for being connected with a lifting device (a structure comprising an arm frame structure), so that the lifting of the initiating bomb automatic conveying and filling mechanism is realized.

Preferably, the explosive conveying assembly comprises an explosive conveying pipe 3 and a clamping conveying assembly 4, one end of the explosive conveying pipe 3 is connected with an explosive device (containing a power source such as a conveying pump and the like for conveying explosives), and the other end of the explosive conveying pipe extends into a section blast hole of the tunnel rock body 2 through a conveying pipeline and is used for conveying the explosives into the section blast hole of the tunnel rock body 2; the clamping and conveying assembly 4 is used for clamping and fixing the medicine conveying pipe 3.

Preferably, a counter 9 for detecting the number of the priming bombs is further arranged on the conveying pipeline.

Referring to fig. 2, the clamping and conveying assembly 4 comprises a driving motor 401, a driving connection member, an upper clamping assembly, a lower clamping assembly and a housing (not labeled); the fixed end of the driving motor 401 is installed on the housing (not marked) and fixed by the connection of the housing (not marked) and the base 1, and the driving end thereof is connected with the driving connecting piece and connected with the upper clamping component and the lower clamping component by the driving connecting piece so as to realize the clamping and conveying or resetting of the drug delivery tube 3.

Preferably, the driving connection member includes a driving shaft 402, and a first driving wheel 403 and a second driving wheel 404 mounted on the driving shaft 402, the driving shaft 402 is mounted on the driving end of the driving motor 401, and the first driving wheel 403 and the second driving wheel 404 are juxtaposed in a vertical direction.

Preferably, the upper clamping assembly comprises a first driven wheel 405, a second driven wheel 406 and a first clamping member 407, wherein the first driven wheel 405 is in meshing connection with the first driving wheel 403, and is connected with the second driven wheel 406 through the first clamping member 407 so as to be driven by the driving motor 401 to move.

Preferably, the lower clamping assembly comprises a third driven wheel 408, a fourth driven wheel 409 and a second clamping member 410, wherein the third driven wheel 408 is in meshed connection with the second driving wheel 404 and is connected with the fourth driven wheel 409 through the second clamping member 410 so as to move under the driving of the driving motor 401 and realize the clamping and conveying of the drug delivery tube 3 through the cooperation with the upper clamping assembly.

Preferably, the initiating bomb delivery assembly comprises a compressed air delivery pipe 5, an initiating bomb storage assembly 6 and an initiating bomb delivery pipe 7; one end of the compressed air conveying pipe 5 is connected with the air compression device, and the other end of the compressed air conveying pipe is connected with the detonation bomb storage assembly 6 and used for conveying the detonation bombs in the detonation bomb storage assembly 6 into the detonation bomb conveying pipe 7; one end of the detonating bullet conveying pipe 7 is connected with the detonating bullet storage assembly 6, and the other end of the detonating bullet conveying pipe extends to a section blast orifice of the tunnel rock body 2 through a conveying pipeline and is used for conveying the detonating bullets into the section blast orifices of the tunnel rock body 2.

Referring to fig. 3, the initiating bomb storage assembly 6 comprises an initiating bomb bin 601 and a displacement assembly for driving the compressed air conveying pipe (5) and the initiating bomb conveying pipe (7) to displace simultaneously, wherein the initiating bomb bin 601 is arranged in a structure which is partitioned into at least one cavity through a partition plate and used for partitioned storage of different initiating bombs; the displacement subassembly includes conveyer pipe mounting panel 602, the drive 603 that slides and the guide rail 604 that slides, conveyer pipe mounting panel 602, the drive 603 that slides and the guide rail 604 that slides all are equipped with two, and two slide guide rails 604 set up respectively on the both sides face of detonating bullet magazine 601, and the drive end of the drive 603 that slides is connected with the one end of conveyer pipe mounting panel 602, two the other end of conveyer pipe mounting panel 602 is connected with compressed air conveyer pipe 5 and detonating bullet conveyer pipe 7 respectively to realize that conveyer pipe mounting panel 602 drives compressed air conveyer pipe 5 and detonating bullet conveyer pipe 7 and carries out the displacement on slide guide rail 604.

Preferably, the invention further comprises a conversion assembly 8, wherein the conversion assembly 8 is used for communicating the explosive conveying assembly with the section blast holes of the tunnel rock body 2 or communicating the explosive conveying assembly with the section blast holes of the tunnel rock body 2.

Referring to fig. 4, the switching assembly 8 includes a first conduit 801, a switching disk 802, a switching drive 803, a second conduit 804 and a switching seat 805; the first pipeline 801 and the second pipeline 804 are respectively installed on a conversion disc 802, the conversion disc 802 is connected with a driving end of a conversion drive 803, so that the first pipeline 801 and the second pipeline 804 are controlled by the drive of the conversion drive 803 to perform mutual position conversion; the switch driver 803 is mounted on the switch socket 805 and connected to the base 1 through the switch socket 805.

The construction method for filling the detonation cartridge by applying the detonation cartridge automatic transportation filling mechanism comprises the following specific steps:

step 1, preparation step: installing an automatic detonation bomb transporting and loading mechanism and a detonation bomb, connecting the base 1 with a hoisting device, hoisting the automatic detonation bomb transporting and loading mechanism to the position of a section blast hole of the tunnel rock body 2 through the hoisting device, and aligning a conveying pipeline with the orifice of the section blast hole of the tunnel rock body 2;

step 2, conveying the detonation bomb: the sliding driver 603 drives the compressed air conveying pipe 5 and the detonation bomb conveying pipe 7 to displace to corresponding cavity positions of corresponding detonation bomb bins 601, and the compressed air conveying pipe 5 is connected with an air compression device so as to blow detonation bombs into a second pipeline 804 of the conversion assembly 8 through the detonation bomb conveying pipe 7 by compressed air; then, the conversion drive 803 of the conversion assembly 8 is started, the positions of the first pipeline 801 and the second pipeline 804 are exchanged, and the second pipeline 804 is communicated with the conveying pipeline; starting the clamping and conveying assembly 4 to rotate forwards, and pushing the initiating bomb into a section blast hole of the tunnel rock body 2 through the explosive conveying pipe 3;

step 3, conveying explosives: after the explosive conveying pipe 3 pushes the initiating bomb to the bottom of the section blast hole of the tunnel rock body 2, the clamping conveying assembly 4 rotates reversely to drive the explosive conveying pipe 3 to return and convey the explosive simultaneously;

and 4, resetting the conversion assembly 8 to finish the filling of the explosive and the detonating cartridge.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.