Concrete pole centrifugal equipment

Abstract

The invention relates to the technical field of concrete electric pole production, and discloses concrete electric pole centrifugal equipment which comprises a sliding table, and a sliding seat is arranged at the top of the sliding table in a sliding mode; and the two placement assemblies are arranged on the two sides of the sliding table correspondingly. According to the device, molds can be spliced and placed on the arc-shaped plates, through sliding of the sliding seats, the empty molds are moved to the supporting assemblies, concrete filling and centrifuging work is conducted on the empty molds at the positions, and meanwhile a new mold is spliced on the other arc-shaped plate; and after the centrifugal work is finished, the mold subjected to centrifugal treatment is placed on the placing assembly through movement of the sliding seat, meanwhile, the sliding seat moves to drive a new mold on the other arc-shaped plate to move to the supporting assembly, and after the new mold is placed, the centrifugal work is carried out, so that the continuous production work of the electric pole can be realized, and the production efficiency of the electric pole is improved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete pole production, in particular to a concrete pole centrifugal device. Background Art

[0002] Electric poles play the role of supporting overhead wires. Concrete poles are made of concrete and steel bars or steel wires. During the production process of concrete poles, centrifugal force is used to evenly distribute the concrete to make it dense, reduce bubbles and voids, and thus improve the strength and durability of the poles. Therefore, in general, a concrete pole centrifugal equipment is required during the production process of concrete poles.

[0003] In the prior art, most centrifugal equipment for concrete poles supports the mold through a supporting mechanism, and then drives the mold to rotate through a power unit to achieve centrifugal treatment. However, during use, this technical solution requires lifting equipment to lift the mold, and the position of the mold is adjusted by conveying equipment in conjunction with the lifting equipment. In addition, after the centrifugal work is completed, due to the large mass of the mold and concrete, it is necessary to wait for a long time before the mold can be transported. Therefore, during the use of the centrifugal equipment, the processes of mold loading, centrifugal treatment, and mold unloading require the processing of lifting equipment and conveying equipment. Therefore, the centrifugal process is discontinuous, resulting in a decrease in work efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of work efficiency caused by the inability to produce continuously, and to propose a concrete pole centrifugal device.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A concrete pole centrifugal device, comprising:

[0007] A slide, a slide seat is slidably arranged on the top of the slide;

[0008] Two placement components, the two placement components are respectively arranged on both sides of the slide;

[0009] Two support assemblies, the two support assemblies are respectively arranged on both sides of the slide;

[0010] Two transfer assemblies, both of which are fixed on the top of the slide, and the transfer assemblies are used to lift the mold;

[0011] Wherein, the transport component comprises:

[0012] A hydraulic push rod, the hydraulic push rod is fixed on the top of the slide seat, and a curved plate is fixed on the telescopic end of the hydraulic push rod;

[0013] Two limiting mechanisms, both of which are fixed on the top of the slide, and the two limiting mechanisms are respectively fixed on both sides of the hydraulic push rod, and the limiting mechanisms are used for stabilizing and decelerating the mold.

[0014] Based on the above technical solution, the present invention can also be improved as follows.

[0015] Preferably, the placement component comprises:

[0016] The second base has support blocks at four corners of the top of the second base, and the tops of the support blocks are all arc structures.

[0017] Preferably, the support assembly comprises:

[0018] A first base, wherein two supporting bases are arranged on the top of the first base;

[0019] Two first rotating shafts are respectively rotatably connected to two supporting seats, and supporting wheels are fixed at both ends of each first rotating shaft.

[0020] Preferably, the limiting mechanism comprises:

[0021] A first sleeve, wherein the first sleeve is fixed on the top of the slide seat, and a first sleeve rod is slidably arranged in the first sleeve;

[0022] A first spring damping shock absorber, wherein the first spring damping shock absorber is fixed on the inner wall of the bottom of the first sleeve, and the first spring damping shock absorber and the first sleeve rod are fixed;

[0023] An annular seat, the annular seat being fixed to the top end of the first set of rods;

[0024] The second rotating shaft is rotatably arranged in the annular seat, and extrusion wheels are fixed at both ends of the second rotating shaft.

[0025] Preferably, the limiting mechanism further comprises:

[0026] Two connecting frames, both of which are fixed to the arc plate, the tops of both of which are arc structures, and the inner wall of the arc of each connecting frame is fixed with a rubber pad;

[0027] A baffle, wherein the baffle is fixed on two connecting frames;

[0028] A stopper is fixed on the first set of rods and is located above the baffle.

[0029] Preferably, the transport component further comprises:

[0030] Two fixing plates, both of which are fixed on the side walls of the slide;

[0031] A screw rod, the screw rod is rotatably arranged on two fixed plates;

[0032] The transmission block is fixed to the sliding seat, a threaded hole is provided on the side wall of the transmission block, and a screw rod passes through the threaded hole.

[0033] Preferably, the transport component further comprises:

[0034] A motor, wherein the motor is fixed to one of the fixing plates, and the output shaft of the motor is fixed to the lead screw;

[0035] Four rollers are respectively fixed on two side walls of the sliding seat.

[0036] Preferably, the limiting mechanism comprises:

[0037] A second sleeve, wherein the second sleeve is fixed on the top of the slide seat, a second sleeve rod is slidably arranged in the second sleeve, a piston ring is fixed at the bottom end of the second sleeve rod, and the piston ring is slidably arranged in the second sleeve;

[0038] A second spring, wherein the second spring is fixed to the inner wall of the bottom of the second sleeve, and the second spring is fixed to the piston ring;

[0039] A mounting seat, the mounting seat is fixed at the top end of the second set of rods, a connecting seat is fixedly arranged inside the mounting seat, and a round hole is opened at the end of the connecting seat;

[0040] A first tube body, wherein the first tube body is fixed in the piston ring and the first tube body is communicated with the circular hole;

[0041] Two connecting shafts, the two connecting shafts are rotatably arranged on two ends of the connecting seat respectively, and the second tube body is arranged in the two connecting shafts;

[0042] Two discs are respectively fixed on the two connecting shaft ends, the side walls of the two discs are provided with grooves, air bags are fixed in the two grooves, and the two air bags are respectively connected with the two second tubes.

[0043] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0044] The present invention adopts the method of splicing the molds and placing them on an arc plate, and the sliding of the slide seat allows the empty mold to be moved to the supporting assembly, where the empty mold is filled with concrete and centrifuged, and at the same time, a new mold is spliced ​​on another arc plate; after the centrifugal work is completed, the mold after the centrifugal treatment is placed on the placement assembly through the movement of the slide seat, and at the same time, the movement of the slide seat drives the new mold on the other arc plate to move to the supporting assembly. After the new mold is placed, centrifugal work is performed. At this time, the height of the arc plate is adjusted by the hydraulic push rod to avoid the mold blocking the reset of the slide seat, so that the continuous production of the pole can be realized, and the production efficiency of the pole is improved. The technical means solves the problem of reduced work efficiency caused by discontinuous production in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0046] Figure 2 It is a schematic diagram of the structure of the first sleeve and the first set of rods of the present invention;

[0047] Figure 3 It is a schematic diagram of the structure of the hydraulic push rod and the arc plate of the present invention;

[0048] Figure 4 For the present invention Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0049] Figure 5 It is a schematic cross-sectional structural diagram of the first sleeve of the present invention;

[0050] Figure 6 It is a schematic diagram of the structure of the second sleeve and the second set of rods of the present invention;

[0051] Figure 7 It is a schematic cross-sectional structural diagram of the second sleeve and the second sleeve rod of the present invention.

[0052] In the figure: 1. first base; 2. support base; 3. first rotating shaft; 4. support wheel; 5. second base; 6. support block; 7. slide; 8. fixed plate; 9. screw rod; 10. slide; 11. transmission block; 12. roller; 13. motor; 14. first sleeve; 15. first set of rods; 16. annular seat; 17. second rotating shaft; 18. extrusion wheel; 19. hydraulic push rod; 20. arc plate; 21. connecting frame; 22. rubber pad; 23. block; 24. baffle; 25. first spring damping shock absorber; 26. airbag; 27. connecting seat; 28. first tube body; 29. ​​piston ring; 30. second tube body; 31. second sleeve; 32. second set of rods. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] Combination Figure 1-Figure 7 As shown, a concrete pole centrifugal device of the present invention comprises:

[0055] A slide 7, a slide seat 10 is slidably arranged on the top of the slide 7;

[0056] Two placement components, the two placement components are respectively arranged on both sides of the slide 7;

[0057] Two support assemblies, the two support assemblies are respectively arranged on both sides of the slide 7;

[0058] Two transfer assemblies, both of which are fixed on the top of the slide 10, and the transfer assemblies are used to lift the mold;

[0059] The transport components include:

[0060] A hydraulic push rod 19, which is fixed on the top of the slide 10, and a curved plate 20 is fixed to the telescopic end of the hydraulic push rod 19;

[0061] Two limiting mechanisms, both of which are fixed on the top of the slide 10, and the two limiting mechanisms are respectively fixed on both sides of the hydraulic push rod 19, and the limiting mechanisms are used for stabilizing and decelerating the mold.

[0062] The molds are spliced ​​and placed on the curved plate 20. The empty mold is moved to the support assembly by sliding the slide 10. The empty mold is filled with concrete and centrifuged here. At the same time, a new mold is spliced ​​on another curved plate 20.

[0063] After the centrifugal work is completed, the mold after centrifugal treatment is placed on the placement component through the movement of the slide 10. At the same time, the movement of the slide 10 drives the new mold on another arc plate 20 to move to the support component. When the new mold is placed, centrifugal work is performed. At this time, the height of the arc plate 20 is adjusted by the hydraulic push rod 19 to avoid the mold blocking the reset of the slide 10, so as to realize the continuous production of the pole and improve the production efficiency of the pole.

[0064] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 As shown, the placement components include:

[0065] The second base 5 has support blocks 6 at four corners of the top of the second base 5 , and the tops of the support blocks 6 are all arc structures.

[0066] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 As shown, the support assembly includes:

[0067] A first base 1, with two support bases 2 disposed on the top of the first base 1;

[0068] Two first rotating shafts 3 are rotatably connected to the two supporting seats 2 respectively, and supporting wheels 4 are fixed to both ends of each first rotating shaft 3.

[0069] In a preferred embodiment, the present invention can be further configured as follows: Figure 2 As shown, restricted agencies include:

[0070] A first sleeve 14, which is fixed on the top of the slide 10, and a first sleeve rod 15 is slidably arranged in the first sleeve 14;

[0071] A first spring damping shock absorber 25, the first spring damping shock absorber 25 is fixed on the inner wall of the bottom of the first sleeve 14, and the first spring damping shock absorber 25 and the first sleeve rod 15 are fixed;

[0072] An annular seat 16, the annular seat 16 is fixed on the top end of the first set of rods 15;

[0073] The second rotating shaft 17 is rotatably disposed in the annular seat 16 , and extrusion wheels 18 are fixed at both ends of the second rotating shaft 17 .

[0074] Through the action of the first spring damping shock absorber 25, the two extrusion wheels 18 on the first set of rods 15 are both in contact with the mold. Therefore, during the rotation of the mold, the cooperation of the extrusion wheel 18 and the supporting wheel 4 enables the mold to rotate stably, avoiding large-scale vibration during the rotation of the mold, thereby ensuring the service life of the mold during normal production.

[0075] In a preferred embodiment, the present invention can be further configured as follows: Figure 2 As shown, the restricted agencies also include:

[0076] Two connecting frames 21, both of which are fixed to the arc plate 20, the tops of the two connecting frames 21 are arc structures, and a rubber pad 22 is fixed to the inner wall of the arc of each connecting frame 21;

[0077] A baffle 24, the baffle 24 is fixed on the two connecting frames 21;

[0078] The stopper 23 is fixed on the first set of rods 15 , and the stopper 23 is located above the baffle plate 24 .

[0079] When the arc plate 20 rises, the connecting frame 21 is driven to rise, and then the baffle 24 and the block 23 are driven to collide, so that the first set of rods 15 are raised, and then the annular seat 16 and the extrusion wheel 18 on the first set of rods 15 are raised to ensure that the mold can be transported normally.

[0080] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 As shown, the transport assembly also includes:

[0081] Two fixing plates 8, both fixing plates 8 are fixed on the side walls of the slide 7;

[0082] A screw rod 9, which is rotatably arranged on two fixed plates 8;

[0083] The transmission block 11 is fixed to the slide seat 10 , a threaded hole is formed on the side wall of the transmission block 11 , and the screw rod 9 passes through the threaded hole.

[0084] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 As shown, the transport assembly also includes:

[0085] A motor 13, wherein the motor 13 is fixed to one of the fixing plates 8, and an output shaft of the motor 13 is fixed to the lead screw 9;

[0086] Four rollers 12 are respectively fixed on two side walls of the slide 10 .

[0087] When the motor 13 is turned on, the motor 13 drives the screw rod 9 to rotate, and cooperates with the threaded hole on the transmission block 11 to make the slide 10 slide along the surface of the slide table 7. With the auxiliary support of the roller 12, the slide 10 is easy to move.

[0088] The specific working principle of a concrete pole centrifugal device of the present invention is as follows:

[0089] First, multiple devices are placed in a straight line in sequence. During the working process, the molds are spliced ​​and placed on the curved plate 20;

[0090] Next, turn on the switch of the motor 13. When the motor 13 is working, it drives the screw 9 to rotate, and cooperates with the threaded hole on the transmission block 11 to make the slide 10 slide along the surface of the slide 7. With the auxiliary support of the roller 12, it is convenient for the slide 10 to move, and then drive the mold to move to between the two support wheels 4. Before the mold moves to this place, turn on the switch of the hydraulic push rod 19. When the hydraulic push rod 19 is working, it drives the arc plate 20 to rise, and then drives the mold to rise, so that the mold can rise above the support wheel 4. Then, cooperate with the work of the motor 13, so that the mold can move to the middle of the first base 1, and then drive the arc plate 20 to descend through the hydraulic push rod 19, so that the mold can contact each support wheel 4;

[0091] In this process, the mold is restricted by the extrusion wheels 18 on both sides of the hydraulic push rod 19, so that the mold can be stably fixed on the arc plate 20, and the mold can be moved smoothly through multiple arc plates 20 of the device to ensure that the mold can be stably moved between the support wheels 4 on the first base 1;

[0092] Finally, concrete is injected into the mold, and then the centrifugal power unit and the mold are fixed, and the switch of the power unit is turned on to drive the mold to rotate. In this process, the support wheel 4 rotates at a high speed through the rotation of the support wheel 4 and the support of the mold, so that the concrete in the mold is deposited on the inner wall of the mold under the action of centrifugal force, so as to realize the centrifugal process of the pole;

[0093] In this process, the two extrusion wheels 18 on the first set of rods 15 are in contact with the mold through the action of the first spring damping shock absorber 25. Therefore, during the rotation of the mold, the mold can be stably rotated through the cooperation of the extrusion wheel 18 and the supporting wheel 4, avoiding large vibrations during the rotation of the mold, thereby ensuring the service life of the mold in the normal production process. In addition, after the centrifugal work is completed, the switch of the power unit is disconnected. Since the mold and the concrete in the mold have a large mass, even if the power unit stops power output, the mold can still rotate for a long time, thereby reducing the production efficiency. The hydraulic push rod 19 drives the hydraulic push rod 19 to rotate. The movable arc plate 20 descends, and during the process of the arc plate 20 descending, the two connecting frames 21 are driven to descend, and the rubber pad 22 on the connecting frame 21 contacts the second rotating shaft 17, so that the friction force when the second rotating shaft 17 rotates increases, thereby reducing the rotation speed of the second rotating shaft 17. Therefore, the mold can stop rotating under the action of the extrusion wheel 18, the second rotating shaft 17, the connecting frame 21, and the rubber pad 22. By controlling the descending height of the connecting frame 21, the friction force on the second rotating shaft 17 can be changed, and then the resistance of the second rotating shaft 17 can be adjusted according to different types of concrete, avoiding excessive deceleration of the mold, so as to improve production efficiency while ensuring product quality;

[0094] When the mold stops rotating, the mold is lifted again by the operation of the hydraulic push rod 19 in cooperation with the arc plate 20, and the mold is moved to the top of the second base 5 by the movement of the slide 10, and the mold is placed by the support of the support block 6 on the second base 5. After the mold is placed, the new mold on the other set of arc plates 20 is already above the first base 1, and the concrete injection work can be carried out. At this time, by the movement of the slide 10, the hydraulic push rod 19 adjusts the height of the arc plate 20, so that the slide 10 is completely reset, that is, the hydraulic push rod 19 at the second base 5 moves to the first base 1, and the hydraulic push rod 19 at the first base 1 moves to the end of the slide 7, so that the new mold can be spliced ​​during the centrifugal treatment of the mold, thereby improving the production efficiency of the pole.

[0095] Embodiment 2:

[0096] A concrete pole centrifugal device, the limiting mechanism comprises:

[0097] A second sleeve 31, the second sleeve 31 is fixed on the top of the slide 10, a second sleeve rod 32 is slidably arranged in the second sleeve 31, a piston ring 29 is fixed at the bottom end of the second sleeve rod 32, and the piston ring 29 is slidably arranged in the second sleeve 31;

[0098] A second spring 33, the second spring 33 is fixed on the inner wall of the bottom of the second sleeve 31, and the second spring 33 and the piston ring 29 are fixed;

[0099] A mounting seat, the mounting seat is fixed at the top end of the second set of rods 32, a connecting seat 27 is fixedly arranged in the mounting seat, and a round hole is opened at the end of the connecting seat 27;

[0100] A first tube body 28, the first tube body 28 is fixed in the piston ring 29, and the first tube body 28 is communicated with the circular hole;

[0101] Two connecting shafts, the two connecting shafts are rotatably disposed on both ends of the connecting seat 27, and the second tube body 30 is disposed in each of the two connecting shafts;

[0102] Two discs are respectively fixed at the two ends of the connecting shafts. The side walls of the two discs are provided with grooves. Airbags 26 are fixed in the two grooves, and the two airbags 26 are respectively connected to the two second tube bodies 30. It should also be noted that a wear-resistant layer is provided on the outer side of the airbag 26 to extend the overall service life and ensure that leakage and damage are not likely to occur when in contact with the mold.

[0103] When the mounting seat descends, the piston ring 29 is driven to descend along the second sleeve 31 through the second sleeve rod 32, so that the gas in the second sleeve 31 enters the circular hole of the connecting seat 27 through the first tube body 28, and then enters the airbag 26 through the circular hole and the second tube body 30, so that the airbag 26 expands, thereby increasing the contact area and extrusion force between the airbag 26 and the mold, thereby increasing the friction between the disc and the mold. At this time, when the connecting shaft is squeezed by the rubber pad 22 and decelerated, under the action of the friction force provided by the airbag 26, the movement state between the disc and the mold can be quickly synchronized through friction, thereby ensuring the rapid adjustment of the mold rotation speed.

[0104] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0105] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete pole centrifugal device, It is characterized in that include: A slide table (7), a slide seat (10) being slidably arranged on the top of the slide table (7); Two placement components, the two placement components are respectively arranged on both sides of the slide (7); Two support assemblies, the two support assemblies are respectively arranged on both sides of the slide (7); Two transfer assemblies, both of which are fixed on the top of the slide (10), and the transfer assemblies are used to lift the mold; Wherein, the transport component comprises: A hydraulic push rod (19), wherein the hydraulic push rod (19) is fixed on the top of the slide seat (10), and an arc plate (20) is fixed to the telescopic end of the hydraulic push rod (19); Two limiting mechanisms are provided, both of which are fixed on the top of the slide seat (10), and the two limiting mechanisms are respectively fixed on both sides of the hydraulic push rod (19), and the limiting mechanisms are used for stabilizing and decelerating the mold.

2. A concrete pole centrifugal device according to claim 1, It is characterized in that The placement component comprises: A second base (5), wherein support blocks (6) are arranged at four corners of the top of the second base (5), and the tops of the support blocks (6) are all arc structures.

3. A concrete pole centrifugal device according to claim 1, It is characterized in that The support assembly comprises: A first base (1), wherein two support bases (2) are arranged on the top of the first base (1); Two first rotating shafts (3) are respectively rotatably connected to two support seats (2), and support wheels (4) are fixed at both ends of each first rotating shaft (3).

4. A concrete pole centrifugal device according to claim 1, It is characterized in that The limiting mechanism comprises: A first sleeve (14), wherein the first sleeve (14) is fixed on the top of the slide seat (10), and a first sleeve rod (15) is slidably arranged in the first sleeve (14); A first spring damping shock absorber (25), wherein the first spring damping shock absorber (25) is fixed on the inner wall of the bottom of the first sleeve (14), and the first spring damping shock absorber (25) and the first sleeve rod (15) are fixed; An annular seat (16), wherein the annular seat (16) is fixed on the top end of the first set of rods (15); A second rotating shaft (17), the second rotating shaft (17) is rotatably arranged in the annular seat (16), and extrusion wheels (18) are fixed at both ends of the second rotating shaft (17).

5. A concrete pole centrifugal device according to claim 4, It is characterized in that The limiting mechanism also includes: Two connecting frames (21), the two connecting frames (21) are both fixed to the arc plate (20), the tops of the two connecting frames (21) are both arc structures, and a rubber pad (22) is fixed to the inner wall of the arc of each connecting frame (21); A baffle (24), wherein the baffle (24) is fixed on the two connecting frames (21); A stopper (23) is fixed on the first set of rods (15), and the stopper (23) is located above the baffle (24).

6. A concrete pole centrifugal device according to claim 1, It is characterized in that The transport component also includes: Two fixing plates (8), both fixing plates (8) are fixed on the side walls of the slide table (7); A screw rod (9), wherein the screw rod (9) is rotatably arranged on two fixed plates (8); A transmission block (11) is fixed to a slide seat (10), a threaded hole is provided on a side wall of the transmission block (11), and a screw rod (9) passes through the threaded hole.

7. A concrete pole centrifugal device according to claim 6, It is characterized in that The transport component also includes: A motor (13), wherein the motor (13) is fixed to one of the fixing plates (8), and an output shaft of the motor (13) is fixed to a screw rod (9); Four rollers (12), the four rollers (12) are respectively fixed on two side walls of the slide seat (10).

8. A concrete pole centrifugal device according to claim 1, It is characterized in that The limiting mechanisms include: A second sleeve (31), the second sleeve (31) is fixed on the top of the slide seat (10), a second sleeve rod (32) is slidably arranged in the second sleeve (31), a piston ring (29) is fixed at the bottom end of the second sleeve rod (32), and the piston ring (29) is slidably arranged in the second sleeve (31); A second spring (33), wherein the second spring (33) is fixed on the inner wall of the bottom of the second sleeve (31), and the second spring (33) and the piston ring (29) are fixed; A mounting seat, the mounting seat being fixed on the top end of the second sleeve rod (32), a connecting seat (27) being fixedly arranged inside the mounting seat, and a circular hole being formed at the end of the connecting seat (27); A first tube body (28), wherein the first tube body (28) is fixed in the piston ring (29), and the first tube body (28) is communicated with the circular hole; Two connecting shafts, the two connecting shafts are rotatably arranged on both ends of the connecting seat (27), and a second tube body (30) is arranged in each of the two connecting shafts; Two discs are respectively fixed at the ends of two connecting shafts, and the side walls of the two discs are provided with grooves, and air bags (26) are fixed in the two grooves, and the two air bags (26) are respectively connected to the two second tubes (30).

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