Long telescopic soot blower

Abstract

The utility model discloses a long telescopic soot blower which comprises a soot blowing pipe, a sports car, a supporting frame, a driving mechanism and a reciprocating type transmission mechanism. The soot blowing pipe is fixed to the sports car, the sports car is installed on the supporting frame in a sliding mode, the driving mechanism is fixed to one end of the supporting frame, and the driving mechanism is connected with the reciprocating type transmission mechanism and used for achieving reciprocating motion of the sports car on the supporting frame and further achieving telescopic motion of the soot blowing pipe. The driving mechanism does not move along with the sports car, so that a cable providing power for the driving mechanism, such as a cable of a motor, is also fixed, the power cable does not need to do reciprocating motion along with the sports car, and the situation that a conductor is broken or the whole cable is broken due to the stress effect of the cable can be avoided; according to the fixed driving mechanism, vibration can be reduced, faults caused by large movement vibration of the driving mechanism are effectively avoided, the maintenance cost is reduced, the weight needing to be driven is reduced, and energy consumption of the driving mechanism can be reduced in a disguised mode.

Description

Technical Field

[0001] This utility model belongs to the technical field of soot blowing equipment, and particularly relates to soot blowing equipment for boilers, specifically a long telescopic soot blower. Background Technology

[0002] In the thermal power generation industry, energy is transferred through the boiler's heating surfaces. Due to factors such as fuel composition, boiler design, and operating conditions, ash and slag buildup on these surfaces becomes increasingly severe over time, reducing heat transfer efficiency and increasing boiler energy consumption. Therefore, regular cleaning of the ash and slag on the heating surfaces is necessary during operation. Long telescopic soot blowers are primarily used to remove ash and slag from the tube bundles in areas such as high-temperature superheaters, low-temperature superheaters, reheaters, and economizers in boilers.

[0003] The structure of the currently widely used telescopic soot blower is as follows: Figure 1 As shown, the device includes a soot blowing pipe 1, a trolley 2, a support frame 3, a gearbox 20, and a motor. The motor is fixed on the trolley 2. The motor drives a first rotating shaft 56 and a second rotating shaft 58 that are perpendicular to each other through the gearbox 20. The first rotating shaft 56 is provided with a drive gear 561 and a trolley pulley 562. The support frame 3 is provided with a rack and pinion track 31, which meshes with the drive gear 561. The trolley 2 is slidably mounted on the support frame 3 through the trolley pulley 562. The soot blowing pipe 1 is fixed on the trolley 2. The soot blowing pipe 1 includes an inner tube 11 and an outer tube 12. The second rotating shaft 58 is connected to the outer tube 12 through a chain 581. During soot blowing, the motor rotates, driving the drive gear 561 of the carriage 2 via the reversing gear 21 inside the gearbox 20. The drive gear 561 moves forward under the force of the upper rack and pinion track 31, thus driving the entire carriage 2, including the motor and gearbox 20, to move. Simultaneously, the motor rotation drives the outer tube 12 of the soot blowing pipe 1 to rotate via the chain 581, realizing the function of the soot blowing pipe 1 rotating and extending into the flue to blow soot. In the current technology, the motor needs to move along with the carriage 2, which means the power cable also needs to move simultaneously. The entire cable is under constant stress during movement, which can easily lead to conductor breakage and equipment failure. Even for low-quality cables, it can break the insulation layer, causing leakage and endangering equipment and personal safety. After a cable failure, the entire cable (approximately 10 meters) must be replaced. Firstly, if only a strand of the cable conductor is broken without a complete break, it is difficult to pinpoint the specific fault location and reconnect from the faulty point. Secondly, the reconnected area will continue to be under stress during subsequent movement, potentially breaking the insulation layer or conductor, or causing more serious consequences. This significantly increases maintenance costs. Meanwhile, since the motor is not fixed, the motor as a whole is in a free state. When running, it will generate large vibrations due to the rotation of the rotor. Large vibrations can lead to faults such as spindle bending, rotor rubbing, and increased bearing clearance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a long telescopic soot blower that is stable in operation, has a low failure rate, and low energy consumption.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A long telescopic soot blower includes a soot blowing tube, a trolley, a support frame, a drive mechanism, and a reciprocating transmission mechanism. The soot blowing tube is fixed on the trolley, the trolley is slidably mounted on the support frame, the drive mechanism is fixed to one end of the support frame, and the drive mechanism is connected to the reciprocating transmission mechanism to realize the reciprocating motion of the trolley on the support frame.

[0007] Preferably, in the above-mentioned long telescopic soot blower, the reciprocating transmission mechanism is a ring transmission mechanism.

[0008] Preferably, in the aforementioned telescopic soot blower, the driving mechanism is a motor, and the annular transmission mechanism includes a driving gear, a driven gear, a moving gear, a rolling gear, and a first chain; the driving gear is located at the output shaft end of the motor, the driving gear and the driven gear are connected by the first chain, the moving gear and the rolling gear are coaxially connected by a first rotating shaft, the first rotating shaft is rotatably mounted on a trolley, the moving gear meshes with the first chain, and a rack and pinion track is provided on the support frame, with the rolling gear meshing with the rack and pinion track.

[0009] Preferably, in the above-mentioned telescopic soot blower, there are two rolling gears, located on both sides of the moving gear, and two support wheels are also installed on the first rotating shaft, with the two support wheels located on the outer sides of the two rolling gears respectively.

[0010] In another preferred embodiment of the aforementioned telescopic soot blower, the driving mechanism is a motor, and the annular transmission mechanism includes a driving gear, a driven gear, a first chain, a forward wheel, a reverse wheel, a first moving wheel, a second moving wheel, a first traction rope, and a second traction rope. The driving gear is located at the output shaft end of the motor. The driving gear and the driven gear are connected by the first chain. The reverse wheel is coaxial with the driving gear, and the forward wheel is coaxial with the driven gear. The first moving wheel and the second moving wheel are coaxially connected by a first rotating shaft, which is rotatably mounted on a trolley. The reverse wheel is connected to the first moving wheel by the first traction rope, and the forward wheel and the second moving wheel are connected by the second traction rope.

[0011] Preferably, in the above-mentioned telescopic soot blower, the first and second moving wheels are located on both sides of the first chain, and the retracting wheel and the forward wheel are located on both sides of the first chain.

[0012] Preferably, in the above-mentioned telescopic soot blower, two support wheels are also installed on the first rotating shaft, and the two support wheels are respectively located on the outer sides of the first moving wheel and the second moving wheel.

[0013] Preferably, in the aforementioned telescopic soot blower, the soot blowing tube includes an inner tube and an outer tube, the trolley is provided with a second rotating shaft parallel to the outer tube, the trolley is provided with a reversing gear, the first rotating shaft and the second rotating shaft are linked by the reversing gear, and the second rotating shaft is provided with a second chain for driving the outer tube to rotate.

[0014] Preferably, in the aforementioned telescopic soot blower, the trolley is equipped with a gearbox, and the reversing gear is located inside the gearbox.

[0015] Preferably, in the above-mentioned telescopic soot blower, multiple guide wheels are provided below the first chain.

[0016] In another preferred embodiment of the aforementioned telescopic soot blower, the driving mechanism is a motor, the reciprocating transmission mechanism includes a lead screw and a nut, the motor is fixed to one end of the support frame, the output shaft of the motor is connected to one end of the lead screw, the lead screw is fixed on the support frame along the direction of movement of the carriage, the carriage is slidably mounted on the support frame, the carriage is connected to the nut, and the nut cooperates with the lead screw.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] This utility model discloses a long telescopic sootblower. A drive mechanism fixed to a support frame, in conjunction with a reciprocating transmission mechanism, enables the trolley to reciprocate on the support frame, thereby achieving the telescopic movement of the sootblowing tube. By separating the drive mechanism from the trolley, the drive mechanism no longer moves with the trolley. Consequently, the power cables supplying the drive mechanism, such as the motor cable, are also fixed. Since the power cable does not need to reciprocate with the trolley, it avoids conductor breakage or complete cable fracture due to stress. The fixed drive mechanism reduces vibration, effectively preventing malfunctions caused by excessive vibration during drive mechanism movement and reducing maintenance costs. Compared to existing technologies where the drive mechanism and trolley move simultaneously, this utility model's long telescopic sootblower, with its fixed drive mechanism, reduces the weight requiring drive, thus indirectly saving energy consumption of the drive mechanism. Attached Figure Description

[0019] Figure 1 The following are three views of a long telescopic soot blower in the prior art, where (a) is the front view, (b) is the left view, and (c) is the top view.

[0020] Figure 2 These are three views of the long telescopic soot blower of Embodiment 1 of this utility model, wherein (a) is the front view, (b) is the left view, and (c) is the top view.

[0021] Figure 3 These are three views of the long telescopic soot blower of Embodiment 2 of this utility model, wherein (a) is the front view, (b) is the left view, and (c) is the top view.

[0022] Figure 4 This is an enlarged schematic diagram of the transmission mechanism in the long telescopic soot blower of Embodiment 2 of this utility model.

[0023] Legend: 1. Soot blowing pipe; 11. Inner pipe; 12. Outer pipe; 2. Carriage; 20. Gearbox; 21. Reversing gear; 3. Support frame; 31. Rack and pinion track; 4. Drive mechanism; 5. Reciprocating transmission mechanism; 51. Driving gear; 511. Return wheel; 512. First moving wheel; 513. First traction rope; 52. Driven gear; 521. Forward wheel; 522. Second moving wheel; 523. Second traction rope; 53. Moving gear; 54. Rolling gear; 55. First chain; 551. Guide wheel; 56. First shaft; 561. Drive gear; 562. Carriage pulley; 57. Support wheel; 58. Second shaft; 581. Chain; 59. Second chain. Detailed Implementation

[0024] Example 1

[0025] A long telescopic soot blower, with the following structure Figure 2 As shown: It includes a soot blowing pipe 1, a carriage 2, a support frame 3, a drive mechanism 4, and a reciprocating transmission mechanism 5; the soot blowing pipe 1 is fixed on the carriage 2, the carriage 2 is slidably mounted on the support frame 3, the drive mechanism 4 is fixed at one end of the support frame 3, and the drive mechanism 4 is connected to the reciprocating transmission mechanism 5 to realize the reciprocating motion of the carriage 2 on the support frame 3.

[0026] In this embodiment, the telescopic sootblower uses a drive mechanism 4 fixed to the support frame 3 and a reciprocating transmission mechanism 5 to achieve the reciprocating movement of the trolley 2 (traveling box) on the support frame 3. The drive mechanism 4, such as the motor, is installed separately from the trolley 2, so that the drive mechanism 4 does not move with the trolley 2. This also fixes the power cables supplying the drive mechanism 4, such as the motor cable. Since the power cable does not need to reciprocate with the trolley 2, it avoids stress on the cable, thus preventing conductor breakage or the entire cable from breaking. The fixed drive mechanism 4 reduces vibration, effectively preventing malfunctions such as motor shaft bending and rotor rubbing caused by excessive vibration, reducing the failure rate and maintenance costs. Simultaneously, the reduced overall weight of the drive mechanism also reduces energy consumption.

[0027] In this embodiment, the drive mechanism 4 is a motor, and the reciprocating transmission mechanism 5 is a ring transmission mechanism. The ring transmission mechanism includes a drive gear 51, a driven gear 52, a moving gear 53, a rolling gear 54, and a first chain 55. The drive gear 51 is located at the output shaft end of the motor. The drive gear 51 and the driven gear 52 are connected by the first chain 55. The moving gear 53 and the rolling gear 54 are coaxially connected by a first rotating shaft 56. The first rotating shaft 56 is rotatably mounted on the sports car 2. The moving gear 53 meshes with the first chain 55. The support frame 3 is provided with a rack and pinion track 31. In this embodiment, the rack and pinion track 31 is specifically located on the top of the support frame 3. The rolling gear 54 meshes with the rack and pinion track 31.

[0028] The transmission method is as follows: The rotation of the motor drives the drive gear 51 located at the output shaft end of the motor to rotate, and the first chain 55 meshing with it rotates simultaneously, driving the motion gear 53 meshing with the first chain 55 to rotate. At the same time, the rolling gear 54 coaxial with the motion gear 53 rotates. The rolling gear 54 moves forward or backward under the reaction force of the rack and pinion track 31, thereby causing the entire carriage 2 to start moving forward or backward, ultimately driving the soot blowing pipe 1 on the carriage 2 to extend and retract. The long telescopic soot blower of this embodiment has a simple structure, few precision parts, and a low failure rate.

[0029] In this embodiment, there are two rolling gears 54, located on both sides of the moving gear 53. Two support wheels 57 are also mounted on the first rotating shaft 56, located on the outer sides of the two rolling gears 54. The cooperation between the two rolling gears 54 and the two support wheels 57 ensures that the sports car 2 has a balanced and stable supporting force, making the movement smoother. Furthermore, the support wheels 57 of the sports car 2 can also support the sports car 2 on the rack and pinion track 31, while reducing the friction experienced by the sports car 2 on the rack and pinion track 31.

[0030] In this embodiment, the sootblowing pipe 1 includes an inner pipe 11 and an outer pipe 12. A second rotating shaft 58 parallel to the outer pipe 12 is provided on the trolley 2. A gearbox 20 is provided on the trolley 2, and a reversing gear 21 is provided inside the gearbox 20. The first rotating shaft 56 and the second rotating shaft 58 are linked through the reversing gear 21. A second chain 59 is provided on the second rotating shaft 58 to drive the outer pipe 12 to rotate. Simultaneously with the rotation of the rolling gear 54, the first rotating shaft 56 is driven to rotate. The first rotating shaft 56, through the reversing gear 21, causes the second rotating shaft 58 to rotate. A gear is provided at the end of the second rotating shaft 58, which drives the outer pipe 12 to rotate through the chain. In other words, the movement of the trolley 2 drives the outer pipe 12 of the sootblowing pipe 1 to rotate, so that the nozzles of the outer pipe 12 and the inner pipe 11 of the sootblowing pipe 1 rotate while extending into the flue, spraying compressed air or steam through the nozzles to continuously impact and clean the heated surface.

[0031] In this embodiment, three guide wheels 551 are provided below the first chain 55. The function of the guide wheels 551 is to support the chain and shorten the width of the chain loop so that it can mesh with the rolling gear 54 of the sports car 2 from both the top and bottom.

[0032] Example 2

[0033] A long telescopic soot blower, with the following structure Figure 3 As shown: It includes a soot blowing pipe 1, a carriage 2, a support frame 3, a drive mechanism 4, and a reciprocating transmission mechanism 5; the soot blowing pipe 1 is fixed on the carriage 2, the carriage 2 is slidably mounted on the support frame 3, the drive mechanism 4 is fixed at one end of the support frame 3, and the drive mechanism 4 is connected to the reciprocating transmission mechanism 5 to realize the reciprocating motion of the carriage 2 on the support frame 3.

[0034] In this embodiment, the telescopic sootblower uses a drive mechanism 4 fixed to the support frame 3 and a reciprocating transmission mechanism 5 to achieve the reciprocating movement of the trolley 2 (traveling box) on the support frame 3. The drive mechanism 4, such as the motor, is installed separately from the trolley 2, so that the drive mechanism 4 does not move with the trolley 2. This also fixes the power cables supplying the drive mechanism 4, such as the motor cable. Since the power cable does not need to reciprocate with the trolley 2, it avoids stress on the cable, thus preventing conductor breakage or the entire cable from breaking. The fixed drive mechanism 4 reduces vibration, effectively preventing malfunctions such as motor shaft bending and rotor rubbing caused by excessive vibration, reducing the failure rate and maintenance costs. Simultaneously, the reduced overall weight of the drive mechanism also reduces energy consumption.

[0035] In this embodiment, the drive mechanism 4 is a motor, and the reciprocating transmission mechanism 5 is a ring transmission mechanism, such as... Figure 4 As shown, the ring transmission mechanism includes a driving gear 51, a driven gear 52, a first chain 55, a forward pulley 521, a reverse pulley 511, a first moving pulley 512, a second moving pulley 522, a first traction rope 513, and a second traction rope 523. The driving gear 51 is located at the output shaft end of the motor. The driving gear 51 and the driven gear 52 are connected by the first chain 55. The reverse pulley 511 is coaxial with the driving gear 51, and the forward pulley 521 is coaxial with the driven gear 52. The first moving pulley 512 and the second moving pulley 522 are coaxially connected by a first rotating shaft 56, which is rotatably mounted on the carriage 2. The reverse pulley 511 and the first moving pulley 512 are connected by the first traction rope 513, and the forward pulley 521 and the second moving pulley 522 are connected by the second traction rope 523. The first traction rope 513 and the second traction rope 523 are belts.

[0036] The transmission method is as follows: The motor rotates, driving the drive gear 51 and the return wheel 511 located at the motor shaft to rotate. The drive gear 51 drives the driven gear 52 to rotate via the first chain 55. The driven gear 52 drives the forward wheel 521, which is coaxial with it, to rotate. The forward wheel 521 pulls the first moving wheel 512 and the second moving wheel 522 closer to it via a traction rope. As the forward wheel 521 retracts the rope, the return wheel 511 releases the rope, and the trolley 2 begins to move forward (towards the forward wheel 521). Similarly, when reversing, the return wheel 511 pulls the first moving wheel 512 and the second moving wheel 522 closer to it via a traction rope. As the return wheel 511 retracts the rope, the forward wheel 521 releases the rope, and the trolley 2 begins to move backward (towards the return wheel 511). This achieves the reciprocating motion of the trolley 2, ultimately driving the sootblowing pipe 1 on the trolley 2 to extend and retract. The long telescopic sootblower of this embodiment has a simple structure, few precision parts, and a low failure rate.

[0037] In this embodiment, the first moving wheel 512 and the second moving wheel 522 are respectively located on both sides of the first chain 55, and the reversing wheel 511 and the forward wheel 521 are respectively located on both sides of the first chain 55. By placing the first moving wheel 512 and the second moving wheel 522 on both sides of the first chain 55, and the reversing wheel 511 and the forward wheel 521 on both sides of the first chain 55, the overall structure of the transmission mechanism is symmetrical and the transmission is balanced, which is beneficial to the stable operation of the vehicle 2.

[0038] In this embodiment, two support wheels 57 are also installed on the first rotating shaft 56. The two support wheels 57 are located on the outer sides of the first moving wheel 512 and the second moving wheel 522, respectively, which can improve the support stability of the sports car 2.

[0039] In this embodiment, the sootblowing pipe 1 includes an inner pipe 11 and an outer pipe 12. The trolley 2 is equipped with a second rotating shaft 58 parallel to the outer pipe 12. The trolley 2 is equipped with a gearbox 20, and the gearbox 20 contains a reversing gear 21. The first rotating shaft 56 and the second rotating shaft 58 are linked by the reversing gear 21. The second rotating shaft 58 is equipped with a second chain 59 for driving the outer pipe 12 to rotate. While the first moving wheel 512 and the second moving wheel 522 are rotating, the first rotating shaft 56 is driven to rotate. The first rotating shaft 56 causes the second rotating shaft 58 to rotate through the reversing gear 21. The end of the second rotating shaft 58 is equipped with a gear, which drives the outer pipe 12 to rotate through the chain. That is, the movement of the trolley 2 drives the outer pipe 12 of the sootblowing pipe 1 to rotate, so that the nozzles of the outer pipe 12 and the inner pipe 11 of the sootblowing pipe 1 rotate and extend into the flue at the same time, spraying compressed air or steam through the nozzles to continuously impact and clean the heated surface.

[0040] In this embodiment, three guide wheels 551 are provided below the first chain 55. The function of the guide wheels 551 is to support the chain and shorten the width of the chain loop so that it can mesh with the rolling gear 54 of the trolley 2 from both the top and bottom.

[0041] Of course, in addition to the transmission mechanisms presented in embodiments 1 and 2 above, the reciprocating transmission mechanism 5 in other embodiments can also be other transmission components that can achieve the purpose of this utility model. For example, it can be driven by a motor in conjunction with a screw / nut mechanism. The motor is fixed at one end of the support frame 3, the output shaft of the motor is connected to one end of the screw, the screw is fixed on the support frame 3 along the direction of movement of the carriage 2, the carriage 2 is slidably mounted on the support frame 3, the carriage 2 is connected to the nut, and the nut cooperates with the screw.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the spirit and technical solution of the present utility model. Therefore, any simple modifications, equivalent substitutions, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A long-stroke sootblower characterized by: The utility model provides a steam pipe soot blowing device, including blowing pipe (1), racing car (2), support frame (3), drive mechanism (4), reciprocating transmission mechanism (5), blowing pipe (1) is fixed on racing car (2), racing car (2) is slidably installed on support frame (3), drive mechanism (4) is fixed in support frame (3) one end, drive mechanism (4) is connected with reciprocating transmission mechanism (5), is used for realizing the reciprocating motion of racing car (2) on support frame (3).

2. The long-stroke sootblower according to claim 1, characterized in that: The reciprocating transmission mechanism (5) is an annular transmission mechanism.

3. The long retractable sootblower according to claim 2, characterized in that: The drive mechanism (4) is a motor, and the annular transmission mechanism includes a driving gear (51), a driven gear (52), a movement gear (53), a rolling gear (54), and a first chain (55). The driving gear (51) is located at the output shaft end of the motor. The driving gear (51) is connected with the driven gear (52) through the first chain (55). The movement gear (53) is coaxially connected with the rolling gear (54) through a first rotating shaft (56). The first rotating shaft (56) is rotatably installed on the racing car (2). The movement gear (53) is engaged with the first chain (55). The support frame (3) is provided with a rack rail (31). The rolling gear (54) is engaged with the rack rail (31).

4. The long retractable sootblower according to claim 3, characterized in that: The rolling gear (54) has two, which are located on both sides of the movement gear (53). The first rotating shaft (56) is further provided with two supporting wheels (57), which are located on the outer sides of the two rolling gears (54).

5. The long retractable sootblower according to claim 2, characterized in that: The drive mechanism (4) is a motor, and the annular transmission mechanism includes a driving gear (51), a driven gear (52), a first chain (55), an advancing wheel (521), a retreating wheel (511), a first movement wheel (512), a second movement wheel (522), a first traction rope (513), and a second traction rope (523). The driving gear (51) is located at the output shaft end of the motor. The driving gear (51) is connected with the driven gear (52) through the first chain (55). The retreating wheel (511) is coaxial with the driving gear (51). The advancing wheel (521) is coaxial with the driven gear (52). The first movement wheel (512) is coaxially connected with the second movement wheel (522) through a first rotating shaft (56). The first rotating shaft (56) is rotatably installed on the racing car (2). The retreating wheel (511) is connected with the first movement wheel (512) through the first traction rope (513). The advancing wheel (521) is connected with the second movement wheel (522) through the second traction rope (523).

6. The long retractable sootblower according to claim 5, characterized in that: The first movement wheel (512) and the second movement wheel (522) are located on both sides of the first chain (55). The retreating wheel (511) and the advancing wheel (521) are located on both sides of the first chain (55).

7. The long retractable sootblower according to claim 5, characterized in that: The first rotating shaft (56) is further provided with two supporting wheels (57), which are located on the outer sides of the first movement wheel (512) and the second movement wheel (522).

8. The long reach sootblower according to any one of claims 3 to 7, characterized in that: The soot blowing pipe (1) comprises an inner pipe (11) and an outer pipe (12), the go-kart (2) is provided with a second rotating shaft (58) parallel to the outer pipe (12), the go-kart (2) is provided with a reversing gear (21), the first rotating shaft (56) and the second rotating shaft (58) are linked through the reversing gear (21), and the second rotating shaft (58) is provided with a second chain (59) for driving the outer pipe (12) to rotate.

9. The long reach sootblower according to any one of claims 3 to 7, characterized in that: A plurality of guide wheels (551) are arranged below the first chain (55).

10. The long-stroke sootblower according to claim 1, characterized in that: The driving mechanism (4) is a motor, the reciprocating transmission mechanism (5) comprises a lead screw and a nut, the motor is fixed at one end of the support frame (3), the output shaft of the motor is connected with one end of the lead screw, the lead screw is fixed on the support frame (3) along the movement direction of the go-kart (2), the go-kart (2) is slidably arranged on the support frame (3), the go-kart (2) is connected with the nut, and the nut is matched with the lead screw.

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