1. The utility model provides an accurate pressure regulating pipe-line device based on desuperheating water is supplied with, includes the female pipe of feedwater (2), supplies female pipe of vapour (4), its characterized in that: be connected with temperature reduction water pipe (3) between water supply main pipe (2) and the steam supply main pipe (4), governing valve (5) are installed to the one end of temperature reduction water pipe (3), left hand-operated throttle valve (8) and right hand-operated throttle valve (9) are installed respectively to the both sides of governing valve (5).

2. The precise pressure-regulating pipeline device based on the supply of the temperature-reduced water as claimed in claim 1, is characterized in that: left block valve (6) and right block valve (7) are installed respectively to the both sides of left hand-operated choke valve (8) and right hand-operated choke valve (9), one side that temperature reduction water pipe (3) were kept away from to left hand-operated choke valve (8) and right hand-operated choke valve (9) is provided with adjustment mechanism, the manometer is all installed to the both sides of governing valve (5).

3. The precise pressure-regulating pipeline device based on the supply of the temperature-reduced water as claimed in claim 2, characterized in that: adjustment mechanism is including left regulating spindle (10) and right regulating spindle (11), left side regulating spindle (10) and right regulating spindle (11) are installed in the one end of left hand-operated choke valve (8) and right hand-operated choke valve (9) respectively, left side regulating spindle (10) are kept away from the one end that left hand-operated choke valve (8) and are installed left regulating subassembly (12), right hand-operated choke valve (9) are kept away from the one end of right hand-operated choke valve (9) and are installed right regulating wheel (13), left side regulating subassembly (12) are located same horizontal plane with right regulating wheel (13), drive belt (22) have been cup jointed with the surface of right regulating wheel (13) in left side regulating subassembly (12).

4. The precise pressure regulating pipeline device based on the supply of the temperature-reduced water as claimed in claim 3, characterized in that: left side adjusting part (12) is including crossbeam (15), crossbeam (15) are extending structure, crossbeam (15) are installed in left regulating spindle (10) and are kept away from the one end of left hand-operated throttle valve (8), the equal fixed mounting in both sides of crossbeam (15) has fixed cover (17), left side regulating spindle (10), crossbeam (15), fixed cover (17) are cavity, one side of crossbeam (15) is run through in left side regulating spindle (10), the both ends of crossbeam (15) run through two sets of fixed covers (17) respectively.

5. The precise pressure regulating pipeline device based on the supply of the temperature-reduced water as claimed in claim 4, characterized in that: two sets of one side of fixed cover (17) all is connected with a plurality of groups flexible cover (18), a plurality of groups flexible cover (18) are coniform, a plurality of groups flexible cover (18) cup joint each other and form the semicircle form, and the one end that corresponds fixed cover (17) is kept away from in flexible cover (18) that the semicircle form cup jointed is fixed with the one end of another fixed cover (17).

6. The precise pressure regulating pipeline device based on the supply of the temperature-reduced water as claimed in claim 5, wherein: the inside of crossbeam (15) is provided with supply pipe (16), and is two sets of the inside of fixed cover (17) all is provided with hydraulic pressure pipe (14), hydraulic pressure pipe (14) are the annular, hydraulic pressure pipe (14) and supply pipe (16) UNICOM, hydraulic pressure pipe (14) are made for the elasticity material, hydraulic pressure pipe (14) are located the inside of a plurality of flexible cover (18) of group.

7. The precise pressure regulating pipeline device based on the supply of the temperature-reduced water as claimed in claim 5, wherein: draw-in groove (19) have evenly been seted up on flexible cover (18) the one side outer wall that is close to left regulating spindle (10) axle center, draw-in groove (19) are the echelonment, the great circle direction of a side end face orientation flexible cover (18) of draw-in groove (19), a side end face of draw-in groove (19) is less than 10 with the great circle terminal surface contained angle of flexible cover (18), fixed mounting has card (20) on the inner wall that flexible cover (18) inside and draw-in groove (19) correspond, card (20) are made for elastic construction, the one end that flexible cover (18) inner wall was kept away from in card (20) is crooked towards the axis of flexible cover (18), magnetic ball (21) are all installed to the one end that flexible cover (18) inner wall was kept away from in card (20).

8. The precise pressure regulating pipeline device based on the supply of the temperature-reduced water as claimed in claim 5, wherein: the surface of left side regulating shaft (10) has cup jointed swivel sleeve (23), axis of rotation (24) is all installed to the both sides of swivel sleeve (23), axis of rotation (24) are kept away from one side of reducing warm water pipe (3) and are installed handle (26), and are two sets of the equal fixed mounting in one end that swivel sleeve (23) was kept away from in axis of rotation (24) has regulating plate (25), regulating plate (25) are circular-arc, the interior circle diameter of regulating plate (25) is unanimous with the major circle diameter of flexible cover (18), axis of rotation (24) are cavity extending structure, the internally mounted of axis of rotation (24) has spring (27).

9. The precise pressure regulating pipeline device based on the supply of the temperature-reduced water as claimed in claim 6, characterized in that: one side of the supply pipe (16) close to the left adjusting shaft (10) is connected with a control pipe, and one end of the control pipe far away from the supply pipe (16) is connected with a fixed displacement pump.

Background

The steam cooling usually adopts and utilizes the desuperheating water to absorb the steam heat to make steam temperature reduce, can install the governing valve between supplying the female pipe of vapour and supplying water, adjust the desuperheating water that supplies in the female pipe of vapour through the governing valve, carry out the ration to steam with this realization and cool down. In the existing pressure regulating pipeline, only the regulating valve is used for regulating the temperature-reduced water, and the regulating valve in the conventional pipeline is easy to damage due to the large pressure difference between two sides of the regulating valve.

Disclosure of Invention

The invention aims to provide an accurate pressure regulating pipeline device based on temperature reduction water supply, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an accurate pressure regulating pipe-line installation based on desuperheating water is supplied with, includes the female pipe of feedwater, supplies the female pipe of vapour, be connected with the desuperheating water pipe between the female pipe of feedwater and the female pipe of supply vapour, the governing valve is installed to the one end of desuperheating water pipe, left hand throttle valve and right hand throttle valve are installed respectively to the both sides of governing valve, when supplying the female pipe of vapour needs to supply the desuperheating water, can open left side cut-off valve and right side cut-off valve at first, according to the reading of demand and each manometer afterwards, rotate left regulating shaft and right regulating shaft respectively, can open left hand throttle valve after the left regulating shaft rotates, can open right hand throttle valve after the right regulating shaft rotates, when desuperheating water pipe internal pressure is great, can slow down the opening speed and the range of each hand throttle valve, can effectively reduce the impact of big pressure to the regulating valve like this to improve the regulation precision of regulating valve, the service life of the regulating valve can be prolonged, and when the pressure in the temperature-reduced water pipe is small, the opening speed and the opening amplitude of each manual throttle valve can be increased, so that the working efficiency is improved.

According to the technical scheme, the left block valve and the right block valve are respectively installed on the two sides of the left hand-operated throttle valve and the right hand-operated throttle valve, an adjusting mechanism is arranged on one side, away from the temperature reduction water pipe, of the left hand-operated throttle valve and the right hand-operated throttle valve, and the pressure gauges are installed on the two sides of the adjusting valve.

According to the technical scheme, adjustment mechanism is including left regulating spindle and right regulating spindle, left side regulating spindle and right regulating spindle are installed respectively in the one end that the throttle valve was moved to the left hand and the manual choke valve in the right side, left side regulating spindle is kept away from the one end that the throttle valve was moved to the left hand and is installed left regulating assembly, the right regulating wheel is installed to the one end that right manual throttle valve was kept away from to the manual choke valve in the right side, left side regulating assembly is located same horizontal plane with right regulating wheel, the drive belt has been cup jointed with the surface of right regulating wheel to left side regulating assembly.

According to above-mentioned technical scheme, left side adjusting part is including the crossbeam, the crossbeam is extending structure, the crossbeam is installed in the one end that left regulating spindle kept away from left hand-operated throttle valve, the equal fixed mounting in both sides of crossbeam has fixed cover, left side regulating spindle, crossbeam, fixed cover are cavity, left side regulating spindle runs through one side of crossbeam, two sets of fixed covers are run through respectively at the both ends of crossbeam.

According to the technical scheme, one side of each of the two groups of fixed sleeves is connected with a plurality of groups of telescopic sleeves, the plurality of groups of telescopic sleeves are conical, the plurality of groups of telescopic sleeves are mutually sleeved to form a semicircle, and one end, far away from the corresponding fixed sleeve, of each telescopic sleeve sleeved in the semicircle is fixed with one end of the other fixed sleeve.

According to the technical scheme, the feed pipe is arranged in the beam, the hydraulic pipes are arranged in the fixed sleeve and are annular, the hydraulic pipes are communicated with the feed pipe and are made of elastic materials, and the hydraulic pipes are located in the telescopic sleeves.

According to the technical scheme, the draw-in groove has evenly been seted up on the flexible cover one side outer wall that is close to left regulating spindle axle center, the draw-in groove is the echelonment, a side end face of draw-in groove is towards the great circle direction of flexible cover, a side end face of draw-in groove and the great circle terminal surface contained angle of flexible cover are less than 10, fixed mounting has the card on the inner wall that flexible cover inside and draw-in groove correspond, the card is made for elastic construction, the card is kept away from the one end of flexible cover inner wall and is crooked towards the axis of flexible cover, the card is kept away from the one end of flexible cover inner wall and all installs the magnetic ball.

According to the technical scheme, the swivel sleeve has been cup jointed on the surface of left side regulating shaft, the axis of rotation is all installed to the both sides of swivel sleeve, the handle is installed to one side that the axis of rotation kept away from the cooling water pipe, and is two sets of the equal fixed mounting of one end that the swivel sleeve was kept away from to the axis of rotation has the regulating plate, the regulating plate is circular-arc, the interior circle diameter of regulating plate is unanimous with the major circle diameter of telescopic sleeve, the axis of rotation is cavity extending structure, the internally mounted of axis of rotation has the spring.

According to the technical scheme, one side of the supply pipe, which is close to the left adjusting shaft, is connected with the control pipe, and one end, which is far away from the supply pipe, of the control pipe is connected with the dosing pump.

Compared with the prior art, the invention has the following beneficial effects: through being provided with left hand throttle valve and right hand throttle valve, when supplying the female pipe of vapour and need supply the desuperheating water, can open left block valve and right block valve at first, according to the reading of demand and each manometer afterwards, rotate left regulating shaft and right regulating shaft respectively, can open left hand throttle valve after the left side regulating shaft rotates, right side regulating shaft rotates the back and can open right hand regulating valve, when desuperheating water pipe internal pressure is great, can slow down the opening speed and the range of each hand throttle valve, can effectively reduce the impact of big pressure to the regulating valve like this, thereby improve the regulation precision of regulating valve, can also improve the life of governing valve, when the intraduct pressure of desuperheating water is less, then can increase the opening speed and the range of each hand throttle valve, with this improvement work efficiency.

Drawings

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

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

FIG. 2 is a schematic view of the left adjustment assembly of the present invention;

FIG. 3 is a schematic cross-sectional view of the bellows of the present invention;

FIG. 4 is a schematic representation of the construction of the drive belt of the present invention;

in the figure: 1. a feed pump; 2. a water supply main pipe; 3. a temperature-reducing water pipe; 4. a steam supply main pipe; 5. adjusting a valve; 6. a left block valve; 7. a right block valve; 8. a left-handed throttle valve; 9. a right hand throttle valve; 10. a left adjustment shaft; 11. a right adjustment shaft; 12. a left adjustment assembly; 13. a right adjustment wheel; 14. a hydraulic tube; 15. a cross beam; 16. a supply pipe; 17. fixing a sleeve; 18. a telescopic sleeve; 19. a card slot; 20. a card; 21. a magnetic ball; 22. a transmission belt; 23. a rotating sleeve; 24. a rotating shaft; 25. an adjusting plate; 26. a handle; 27. a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides the following technical solutions: the utility model provides an accurate pressure regulating pipe-line device based on desuperheating water is supplied with, includes the female pipe of water supply 2, supplies the female pipe of vapour 4, supplies to be connected with the desuperheating water pipe 3 between the female pipe of water supply 2 and the female pipe of vapour 4, and governing valve 5 is installed to the one end of desuperheating water pipe 3, and left hand throttle valve 8 and right hand throttle valve 9 are installed respectively to the both sides of governing valve 5.

A left isolating valve 6 and a right isolating valve 7 are respectively installed on two sides of the left manual throttle valve 8 and the right manual throttle valve 9, an adjusting mechanism is arranged on one side, away from the temperature reduction water pipe 3, of the left manual throttle valve 8 and the right manual throttle valve 9, and pressure gauges are installed on two sides of the adjusting valve 5.

The adjustment mechanism is including left regulating spindle 10 and right regulating spindle 11, left regulating spindle 10 and right regulating spindle 11 are installed respectively in the one end of left hand-operated choke valve 8 and right hand-operated choke valve 9, left regulating spindle 10 is kept away from the one end of left hand-operated choke valve 8 and is installed left regulating assembly 12, right hand-operated choke valve 9 is kept away from the one end of right hand-operated choke valve 9 and is installed right regulating wheel 13, left regulating assembly 12 is located same horizontal plane with right regulating wheel 13, drive belt 22 has been cup jointed on the surface of left regulating assembly 12 and right regulating wheel 13.

Left side regulating assembly 12 is including crossbeam 15, and crossbeam 15 is extending structure, and crossbeam 15 is installed in the one end that left hand throttle valve 8 was kept away from to left regulating spindle 10, and the equal fixed mounting in both sides of crossbeam 15 has fixed cover 17, and left side regulating spindle 10, crossbeam 15, fixed cover 17 are cavity, and left side regulating spindle 10 runs through one side of crossbeam 15, and two sets of fixed covers 17 are run through respectively at the both ends of crossbeam 15.

One side of two sets of fixed covers 17 all is connected with a plurality of sets of flexible cover 18, and a plurality of sets of flexible cover 18 are the coniform, and a plurality of sets of flexible cover 18 cup joint each other and form the semicircle form, and the flexible cover 18 that the semicircle form cup jointed is kept away from the one end that corresponds fixed cover 17 and is fixed with the one end of another fixed cover 17.

The inside of crossbeam 15 is provided with supply pipe 16, and the inside of two sets of fixed cover 17 all is provided with hydraulic pressure pipe 14, and hydraulic pressure pipe 14 is the annular, and hydraulic pressure pipe 14 and supply pipe 16 UNICOM, hydraulic pressure pipe 14 are made for the elastic material, and hydraulic pressure pipe 14 is located the inside of a plurality of flexible cover 18 of group.

Draw-in groove 19 has evenly been seted up on the one side outer wall that flexible cover 18 is close to left regulating shaft 10 axle center, draw-in groove 19 is the echelonment, a side end face of draw-in groove 19 is towards the great circle direction of flexible cover 18, a side end face of draw-in groove 19 is less than 10 with the great circle terminal surface contained angle of flexible cover 18, fixed mounting has card 20 on the inside inner wall that corresponds with draw-in groove 19 of flexible cover 18, card 20 is made for elastic construction, the one end that the inner wall of flexible cover 18 was kept away from to card 20 is crooked towards the axis of flexible cover 18, magnetic ball 21 is all installed to the one end that flexible cover.

The swivel sleeve 23 has been cup jointed on the surface of left side regulating shaft 10, axis of rotation 24 is all installed to the both sides of swivel sleeve 23, axis of rotation 24 is kept away from one side of reducing the temperature water pipe 3 and is installed handle 26, the equal fixed mounting of one end that swivel sleeve 23 was kept away from to two sets of axis of rotation 24 has regulating plate 25, regulating plate 25 is circular-arc, the interior circle diameter of regulating plate 25 is unanimous with the great circle diameter of telescopic sleeve 18, axis of rotation 24 is the cavity extending structure, the internally mounted of axis of rotation 24 has spring 27.

One side of the supply pipe 16 close to the left adjusting shaft 10 is connected with a control pipe, and one end of the control pipe far away from the supply pipe 16 is connected with a fixed displacement pump.

The working principle is as follows: water feed pump 1 is installed to the one end of the female pipe 2 of feedwater, water feed pump 1 can be for the female pipe 2 of feedwater supplies water, the water in the female pipe 2 of feedwater can be shunted to in the temperature reduction water pipe 3, these water can flow through the temperature reduction water pipe 3 afterwards and get into in the female pipe 4 of steam supply, can be for the steam cooling in the female pipe 4 of steam supply, at this in-process, left side block valve 6 and right block valve 7 can cut off temperature reduction water pipe 3, make the water in the female pipe 2 of feedwater unable through temperature reduction water pipe 3, so that the steam temperature in the female pipe 4 of steam supply can't reduce, left block valve 6 and right block valve 7 can also be opened, adjust the water flow of the female pipe 2 of feedwater through temperature reduction water pipe 3 through governing valve 5 afterwards, with this realization to the quantitative cooling of the female pipe 4 of feedwater.

When supplying the desuperheating water at the female pipe 4 of steam supply, can open left block valve 6 and right block valve 7 at first, according to the reading of demand and each manometer afterwards, rotate left regulation axle 10 and right regulation axle 11 respectively, left regulation axle 10 rotates the back and can open left hand throttle valve 8, right regulation axle 11 rotates the back and can open right hand regulating valve 9, when 3 internal pressure of desuperheating water pipe is great, can slow down the opening speed and the range of each hand throttle valve, can effectively reduce the impact of big pressure to regulating valve 5 like this, thereby improve regulating valve 5's regulation precision, can also improve regulating valve 5's life, when 3 internal pressure of desuperheating water pipe is less, then opening speed and the range of multiplicable each hand throttle valve, with this improvement work efficiency.

Because the left manual throttle valve 8 and the right manual throttle valve 9 are respectively located at two sides of the regulating valve 5, if a single manual throttle valve is opened, the pressure received by one side corresponding to the regulating valve 5 is suddenly increased, so that great impact is caused to the regulating valve 5, and the control accuracy and the service life of the regulating valve 5 are affected in the past, therefore, a transmission belt 22 is sleeved on the surface of the left regulating assembly 12 and the surface of the regulating wheel 13, when the left regulating assembly 12 is rotated, the left regulating assembly 12 can drive the transmission belt 22 to synchronously rotate, then the transmission belt 22 can drive the regulating wheel 13 to rotate, so that the left regulating shaft 10 and the right regulating shaft 11 rotate together, and finally the left manual throttle valve 8 and the right manual throttle valve 9 are synchronously opened, so that two sides of the regulating valve 5 are simultaneously impacted, so that the impact forces at two sides of the regulating valve 5 are mutually offset, and the service life of the regulating valve 5 is favorably prolonged, and the transmission belt 22 can also enable a worker to complete the synchronous operation of each manual throttle valve by a single person, so that the labor cost is reduced.

When the pressure on the left side of the left-hand-operated throttle valve 8 is smaller than the pressure on the right side of the right-hand-operated throttle valve 9, the opening range of the right-hand-operated throttle valve 9 needs to be larger than the opening range of the left-hand-operated throttle valve 8, so that in the synchronous opening process of the left-hand-operated throttle valve 8 and the right-hand-operated throttle valve 9, the pressures on the two sides of the balance regulating valve 5 can be balanced, then the quantitative pump can be controlled to be opened according to the reading of each pressure gauge, and the hydraulic medium is supplied to the supply pipe 16 through the control pipe, finally the hydraulic medium can enter the hydraulic pipe 14, because the hydraulic pipe 14 is made of elastic material, the volume of the hydraulic medium supplied into the hydraulic pipe 14 can be increased, meanwhile, the cross beam 15 can be extended, because the hydraulic pipe 14 is positioned in the middle of each telescopic sleeve 18, the diameter of the hydraulic pipe 14 cannot be increased, the diameter of a circular ring formed by the hydraulic pipe 14 can be increased, and the diameter of the circular ring formed by the hydraulic pipe 14 can be increased, because the head and tail sections of the semi-circular telescopic sleeves 18 are respectively connected with the two ends of the fixed sleeve 17, and the fixed sleeve 17 can move outwards along with the extension of the cross beam 15, the diameter of the circular ring formed by each telescopic sleeve 18 after the diameter of the circular ring formed by the hydraulic pipe 14 becomes larger can be synchronously expanded, so that the diameter of the circular ring formed by each telescopic sleeve 18 is larger than the diameter of the right regulating wheel 13.

At this moment, the rotating handle 26 drives the adjusting plate 25 to rotate, the adjusting plate 25 is in contact with the fixing sleeve 17 and drives the left adjusting assembly 12 to rotate, and through the contact between the adjusting plate 25 and the fixing sleeve 17, the ring formed by each telescopic sleeve 18 when the adjusting assembly 12 rotates can be ensured not to be deformed by external force, so that the transmission precision of the left adjusting assembly 12 to the transmission belt 22 is ensured, and the stability of rotating the left adjusting assembly 12 can be improved due to the contact between the adjusting plate 25 and the fixing sleeve 17.

As can be seen from the belt drive ratio calculation formula, the drive ratio is the diameter of the capstan: the diameter of the driven wheel is larger than that of the right adjusting wheel 13, and after the diameter of a circular ring formed by each telescopic sleeve 18 is larger than that of the right adjusting wheel 13 and one unit of left adjusting assembly 12 is rotated, the transmission belt 22 can drive the right adjusting wheel 13 to rotate by more than one unit, so that the left manual adjusting valve 8 and the right manual adjusting valve 9 are synchronously opened, and in the synchronous opening process, the opening amplitude of the right manual adjusting valve 9 is larger than that of the left manual adjusting valve 8, so that the impact force received by two sides of the balance adjusting valve 5 is achieved, and the diameter of the circular ring formed by each telescopic sleeve 18 can be adjusted according to the reading of each pressure gauge, so that the left adjusting assembly 12 is ensured to drive the right adjusting wheel 13 to rotate with the optimal transmission ratio.

After each telescope tube 18 is propped open by hydraulic pressure pipe 14, the distance between two adjacent telescope tubes 18 can increase, draw-in groove 19 on telescope tube 18 surface this moment can keep away from each card 20 and remove, and stop after hydraulic pressure pipe 14 stops the inflation, the removal of telescope tube 18 also can stop this moment, the magnetic ball 21 of card 20 front end can block on the terminal surface of corresponding draw-in groove 19 towards telescope tube 18 great circle one side, make telescope tube 18 can be blockked by each card 20, prevent that telescope tube 18 from retracting, thereby make the ring that telescope tube 18 formed guarantee self intensity when the transmission.

Meanwhile, the clamping groove 19 and the clamping piece 20 are only arranged on one side close to the axle center of the left adjusting shaft 10, and the adjusting plate 25 is also arc-shaped, so that the left adjusting component 12 and the transmission belt 22 have enough contact area to ensure the transmission precision.

When the pressure on the left side of the left-hand throttle valve 8 is greater than the pressure on the right side of the right-hand throttle valve 9, the opening range of the left-hand throttle valve 8 needs to be smaller than the opening range of the right-hand throttle valve 9, the constant delivery pump can be controlled to pump out a part of the hydraulic medium in the supply pipe 16 and the hydraulic pipe 14 through the control pipe, at this time, the volume of the hydraulic medium in the hydraulic pipe 14 will be reduced, meanwhile, the diameter of a circular ring formed by the hydraulic pipe 14 will be reduced because the hydraulic pipe 14 is made of elastic material, then the handle 26 is rotated, the rotation direction of the handle 26 is consistent with the orientation of each card 20, the handle 26 will drive the rotating shaft 24 and the adjusting plate 25 at the front end to rotate together, because the adjusting plate 25 is made of magnetic material, and each card 20 faces the axis of the telescopic shaft 18, it will generate suction with each magnetic ball 21 and suck the magnetic ball 21 to the side away from the axis of the telescopic shaft 18, at this moment, each card 20 and the magnetic ball 21 will be attached to the inner wall of the telescopic sleeve 18, no longer provide support for the clamping groove 19, thereby enabling each telescopic sleeve 18 to be contracted together under the driving of the contracted hydraulic pipe 14, reducing the diameter of a circular ring formed by the telescopic sleeve 18, and similarly, knowing according to a transmission ratio calculation formula of belt transmission, after the diameter of the left adjusting component 12 is smaller than the diameter of the right adjusting wheel 13, the opening amplitude of the left hand-operated throttle valve 8 will be smaller than the opening amplitude of the right hand-operated throttle valve 9, and balancing the impact force received by two sides of the adjusting valve 5.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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.