Automatic graphite spraying device for inner hole of steel pipe

Abstract

A device for automatically spraying graphite to an inner hole of a steel pipe comprises a supporting box, a control box and a steel pipe body, the control box is fixedly arranged on the side away from the supporting box, the steel pipe body is movably arranged above the supporting box, an observation window is fixedly connected to the outer wall of the supporting box, and an automatic and uniform graphite spraying structure is arranged at the top end of the supporting box. And a graphite material recycling structure is arranged below the supporting box. According to the device for automatically spraying the graphite to the inner hole of the steel pipe, graphite paint sprayed out by the spray head to the outer side can be shielded by the limiting plates on the two sides, so that the graphite spraying position can be limited, then when the air cylinder pushes the translation seat to move towards the left side of the steel pipe main body, the outermost scraping plate can scrape the graphite paint to be uniformly spread, and the graphite paint can be uniformly sprayed out through reciprocating graphite spraying operation. According to the automatic graphite spraying device for the steel pipe inner hole, redundant graphite coating can be cleaned, it can be guaranteed that graphite is flattened more evenly, a line generated when a pulley passes through is reduced, and the quality of a steel pipe machined through the automatic graphite spraying device for the steel pipe inner hole is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steel pipe production technical field especially relates to a steel pipe inner hole automatic graphite device of spraying. BACKGROUND

[0002] In the steel pipe heat treatment production process, the inner wall of the steel pipe is oxidized to produce oxide skin after entering the heat treatment furnace, which affects the inner hole quality of the steel pipe product. Research shows that evenly coating high-temperature-resistant graphite on the inner surface of the steel pipe can effectively improve this situation.

[0003] For example, the spraying device of the ring-shaped steel pipe with the authorization announcement number CN221638551U, the driving runner drives the driven runner to rotate through the belt, the driven runner drives the lead screw to move to the left side, the lead screw drives the support plate to move to the left side, the support plate drives the spray head to move to the left side through the cooperation of the electric lifting rod, the top plate and the electric telescopic rod, which can facilitate the spraying of the inner wall of the steel pipe, reduce the labor intensity of the workers and improve the work efficiency.

[0004] However, the spraying device of the ring-shaped steel pipe in the above still has some problems when in use, for example, the spraying device of the ring-shaped steel pipe in the above, since the rotating spray head is inserted into the inner side of the steel pipe fixed in position, the graphite is sprayed while rotating, because the graphite needs to be supported by the lower vertical rod and the pulley during the spraying process, which can provide support for the electric telescopic rod and improve the moving stability of the spray head, but the lower pulley will directly contact the position where the graphite is sprayed on the lower end of the inner wall of the ring-shaped steel pipe during sliding, which leaves a horizontal line on the lower end of the inner wall of the steel pipe after spraying the graphite, and the thickness of the graphite sprayed at this position is slightly thinner than that at other positions, which causes a through line with more serious oxidation to be left after the final steel pipe is heat treated, reducing the quality of the steel pipe generated by the final spraying device of the ring-shaped steel pipe.

[0005] At the same time, the existing spraying device of the ring-shaped steel pipe needs to spray the graphite liquid on the inner wall of the steel pipe, and a certain amount of graphite excess material will not be attached to the steel pipe before the graphite is dried, so the excess graphite raw material will be wasted in the cavity inside the support after the steel pipe is taken down, thereby causing waste, and the lost graphite is not easy to collect, which interferes with the cleaning of the environment around the spraying device by the subsequent workers, and affects the use convenience of the spraying device of the ring-shaped steel pipe. SUMMARY

[0006] The utility model solves the above-mentioned problems existing in the prior art and provides a steel pipe inner hole automatic graphite device, which can improve the steel pipe production quality and the use range and effect of the steel pipe production quality.

[0007] The utility model solves the technical problems by adopting the technical scheme of:

[0008] The utility model provides a kind of automatic graphite spraying device in steel pipe hole, including support box, control box and steel pipe main body, the control box is fixedly arranged in the side away from support box, the steel pipe main body is movably arranged above support box, the outer wall of support box is fixedly connected with observation window, the top of support box is equipped with graphite automatic uniform spraying structure, the below of support box is equipped with graphite material recycling structure, the above of control box is equipped with cylinder conveying structure, the other end of control box is equipped with air pump control structure.

[0009] Further improvement, the graphite automatic uniform spraying structure includes fixed ring and translation seat, two the fixed ring is fixedly installed at the top of support box, the steel pipe main body is movably sleeved in the inside of two fixed rings, the translation seat is movably arranged in the inside of steel pipe main body, the both ends of translation seat are fixedly installed with limit plate, the outer side of two the limit plate is fixedly connected with connecting block, the outer side of multiple the connecting block is fixedly installed with two scrapers, the outer wall of translation seat is evenly provided with multiple spray heads.

[0010] Further improvement, the graphite material recycling structure includes drainage pipe and liquid outlet, two the drainage pipe is fixedly arranged in the top of support box both sides, two the drainage pipe top inside movable mounting has filter screen, the inside of support box is fixedly provided with storage cavity, the lower end one side of storage cavity is fixedly connected with liquid outlet, the outer side of liquid outlet is fixedly connected with extraction pump, the other end outer wall of storage cavity is fixedly connected with supplementary pipe.

[0011] Further improvement, the cylinder conveying structure includes pulley and fixed table, two the fixed table is fixedly installed at the top of control box, two the fixed table is fixedly installed with cylinder above, the pulley is fixedly connected on the outer wall one side of support box, the outer side of pulley is rotatably connected with infusion hose.

[0012] Further improvement, the lower end of the infusion hose is communicated with the extraction pump, the other end of the infusion hose is communicated with the inside of the translation seat, the front end of the cylinder is fixedly connected with the end of the translation seat.

[0013] Further improvement, the air pump control structure includes gas storage tank and control valve, the control valve is fixedly connected on the outer wall of control box, the inner side of control valve is fixedly connected with gas pipeline, one end of gas pipeline is fixedly connected with gas storage tank, the other end of gas pipeline is communicated with cylinder, the outer wall top of gas pipeline is fixedly connected with air pressure gauge.

[0014] The utility model has the beneficial effect that: the utility model, the graphite coating that the spray head sprays to the outside is shielded by the two side limit plates, so that the position of graphite spraying can be limited, then when the cylinder pushes the translation seat to move to the left side of the steel pipe main body, the outermost scraper will scrape the graphite coating evenly, when the cylinder pulls the translation seat reversely, the translation seat will move backward, so that the spray head carries out the spraying work again, and the limit plate and the scraper can also repeatedly carry out the limiting and flattening operation, so that through the back-and-forth graphite spraying operation, not only the excess graphite coating can be cleaned, but also the flattened graphite can be ensured to be more uniform, a line produced by the pulley is reduced, and the quality of the processed steel pipe of the steel pipe inner hole automatic graphite spraying device is improved.

[0015] Two drainage pipes are arranged above the two ends of the steel pipe structure, a stainless steel grid frame that can be pulled upward is used as the filter screen, so that the translation seat is pushed by the cylinder to slide horizontally, and the excess graphite is pushed out by the scraper and directly enters the storage cavity in the support box along the vertical drainage pipe, the liquid outlet is connected with the infusion hose at the other end through the extraction pump, when the power supply is connected and the extraction pump is started, the graphite coating in the storage cavity can be extracted and delivered to the translation seat for spraying work, the graphite material is saved, the remaining graphite coating is recycled, the waste is reduced, and the use convenience of the steel pipe inner hole automatic graphite spraying device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0017] Figure 2 It is Figure 1 a front view schematic view;

[0018] Figure 3 It is Figure 1 a top view schematic view;

[0019] Figure 4 It is Figure 2 an enlarged schematic view of part A in the figure;

[0020] Figure 5 It is Figure 2 an enlarged schematic view of part B in the figure

[0021] Figure 6 It is Figure 2 an enlarged schematic view of part C in the figure.

[0022] Explanation of reference signs: In the figure: 1, support box, 2, observation window, 3, control box, 4, steel pipe body, 5, graphite automatic uniform spraying structure, 51, fixed ring, 52, connecting block, 53, scraper, 54, limiting plate, 55, spray head, 56, translation seat, 6, cylinder conveying structure, 61, air cylinder, 62, infusion hose, 63, pulley, 64, fixed table, 7, graphite material recycling structure, 71, filter screen, 72, drainage tube, 73, storage cavity, 74, liquid outlet, 75, extraction pump, 76, replenishment pipe, 8, air pump control structure, 81, gas storage tank, 82, gas pipeline, 83, air pressure gauge, 84, control valve. DETAILED DESCRIPTION

[0023] The utility model will be further described below in combination with the drawings:

[0024] Example 1: refer to the drawings Figures 1-6 In this embodiment, a graphite automatic uniform spraying device for steel pipe inner hole comprises a support box 1, a control box 3 and a steel pipe body 4, the control box 3 is fixedly arranged on the side away from the support box 1, the control box 3 is an existing PLC control system, the working of the air cylinder 61 and the extraction pump 75 can be controlled through the control box 3, the steel pipe body 4 is movably arranged above the support box 1, the steel pipe body 4 is a steel pipe material of uniform specification and metal requiring heat treatment, the outer wall of the support box 1 is fixedly connected with an observation window 2, the top end of the support box 1 is provided with a graphite automatic uniform spraying structure 5, the lower part of the support box 1 is provided with a graphite material recycling structure 7, the upper part of the control box 3 is provided with a cylinder conveying structure 6, and the other end of the control box 3 is provided with an air pump control structure 8.

[0025] The graphite automatic uniform spraying structure 5 comprises a fixed ring 51 and a translation seat 56, two fixed rings 51 are fixedly installed at the top end of the support box 1, the fixed ring 51 is welded above the support box 1, the inner diameters of the two fixed rings 51 are the same, the steel pipe body 4 of the corresponding size can be inserted into the inside of the two fixed rings 51 to form support positioning, the steel pipe body 4 is movably sleeved in the inside of the two fixed rings 51, the translation seat 56 is movably arranged in the inside of the steel pipe body 4, the translation seat 56 is made of stainless steel with a diameter smaller than that of the steel pipe body 4, the two ends of the translation seat 56 are fixedly installed with limiting plates 54, the limiting plates 54 have an area and a diameter larger than those of the translation seat 56 and smaller than the inner diameter of the steel pipe body 4, and the translation seat 56 can be pushed into the inside of the steel pipe body 4 by the air cylinder 61 at the back.

[0026] The outer side of the two limiting plates 54 is fixedly connected with the connecting block 52, the connecting block 54 fixes the two scrapers 53 on the two sides of the limiting plate 54, the outer side of the plurality of connecting blocks 52 is fixedly installed with the two scrapers 53, the scraper 53 is provided with a circle of rubber rings capable of being combined with the inner diameter of the steel pipe body 4 at the edge, the outer wall of the translation seat 56 is uniformly provided with a plurality of spray heads 55, the inside of the spray head 55 is communicated with the infusion tube 62, so that the infusion tube 64 can deliver the graphite paint to the translation seat 56, and then the graphite paint is uniformly sprayed out of the spray head 55 outside the translation seat 56, because the plurality of spray heads 55 are circumferentially arranged outside the translation seat 56, so that the sprayed graphite paint is more uniform and reasonable, the graphite paint sprayed out of the spray head 55 is blocked by the limiting plate 54 on both sides, so that the position of the graphite spraying can be limited.

[0027] Then the cylinder 61 pushes the translation seat 56 to move to the left side of the steel pipe body 4, the outermost scraper 53 will scrape the graphite paint evenly, and the excess graphite paint will flow out of the end of the steel pipe body 4, when the cylinder 61 pulls the translation seat 56 reversely, the translation seat 56 will move backward, so that the spray head 55 performs the spraying work again, and the limiting plate 54 and the scraper 53 can also repeatedly limit and spread the operation, so that the graphite spraying operation through the back and forth operation can not only clean the excess graphite paint, but also ensure that the spread graphite is more uniform, and a line generated by the pulley is reduced;

[0028] The connecting block 52 fixes the two scrapers 53 on the two sides of the limiting plate 54, the scraper 53 is provided with a circle of rubber rings capable of being combined with the inner diameter of the steel pipe body 4 at the edge, the outer wall of the translation seat 56 is uniformly provided with a plurality of spray heads 55, the inside of the spray head 55 is communicated with the infusion tube 62, so that the infusion tube 64 can deliver the graphite paint to the translation seat 56, and then the graphite paint is uniformly sprayed out of the spray head 55 outside the translation seat 56, because the plurality of spray heads 55 are circumferentially arranged outside the translation seat 56, so that the sprayed graphite paint is more uniform and reasonable, the graphite paint sprayed out of the spray head 55 is blocked by the limiting plate 54 on both sides, so that the position of the graphite spraying can be limited.

[0029] Then the cylinder 61 pushes the translation seat 56 to move to the left side of the steel pipe body 4, the outermost scraper 53 will scrape the graphite paint evenly, and the excess graphite paint will flow out of the end of the steel pipe body 4, when the cylinder 61 pulls the translation seat 56 reversely, the translation seat 56 will move backward, so that the spray head 55 performs the spraying work again, and the limiting plate 54 and the scraper 53 can also repeatedly limit and spread the operation, so that the graphite spraying operation through the back and forth operation can not only clean the excess graphite paint, but also ensure that the spread graphite is more uniform, and a line generated by the pulley is reduced;

[0030] The graphite material recycling structure 7 comprises a drainage pipe 72 and a liquid outlet hole 74, two drainage pipes 72 are fixedly arranged on the top of the support box 1, two drainage pipes 72 are arranged above the two ends of the steel pipe structure 4, a filter screen 71 is movably arranged on the top of the two drainage pipes 72, the filter screen 71 is a stainless steel grid frame which can be pulled out upward, so that when the cylinder 61 pushes the horizontal sliding of the translation seat 56, and the excess graphite is pushed out by the scraper 53 and directly enters the storage cavity 73 in the support box 1 along the vertical drainage pipe 71.

[0031] A storage cavity 73 is fixedly arranged in the support box 1, one side of the lower end of the storage cavity 73 is fixedly connected with a liquid outlet hole 74, the liquid outlet hole 74 is connected with the extraction pump 75 and the liquid delivery hose 62 at the other end in communication, when the power supply is connected and the extraction pump 75 is started, the graphite paint in the storage cavity 73 can be extracted and delivered to the translation seat 56 for spraying work, which saves graphite material, the outer side of the liquid outlet hole 74 is fixedly connected with the extraction pump 75, the other end of the outer wall of the storage cavity 73 is fixedly connected with a supplement pipe 76, and the supplement pipe 76 can manually pour into the inside of the storage cavity 73 after the graphite paint is used up for manual pouring;

[0032] Two drainage pipes 72 are arranged above the two ends of the steel pipe structure 4, a filter screen 71 is a stainless steel grid frame which can be pulled out upward, so that when the cylinder 61 pushes the horizontal sliding of the translation seat 56, and the excess graphite is pushed out by the scraper 53 and directly enters the storage cavity 73 in the support box 1 along the vertical drainage pipe 71, the liquid outlet hole 74 is connected with the extraction pump 75 and the liquid delivery hose 62 at the other end in communication, when the power supply is connected and the extraction pump 75 is started, the graphite paint in the storage cavity 73 can be extracted and delivered to the translation seat 56 for spraying work, which saves graphite material, so that the remaining graphite paint is recycled, the waste is reduced, and the use convenience of the steel pipe hole automatic graphite spraying device is improved.

[0033] The cylinder conveying structure 6 comprises a pulley 63 and a fixed table 64, two fixed tables 64 are fixedly arranged on the top of the control box 3, a cylinder 61 is fixedly arranged above the two fixed tables 64, the cylinder 61 is horizontally arranged above the control box 3 by means of the fixed table 64, a pulley 63 is fixedly connected to one side of the outer wall of the support box 1, the pulley 63 can freely rotate above the outer wall of the support box 1, a liquid delivery hose 62 is rotatably connected to the outer side of the pulley 63, the liquid delivery hose 62 is made of a rubber hose which can be stretched and wound for a certain length, when the liquid delivery hose 62 is pulled and moved by the translation seat 56, the outer surface of the pulley 63 can be used to support the liquid delivery hose 62, so as to reduce the abrasion.

[0034] The lower end of the liquid delivery hose 62 is connected with the extraction pump 75, the other end of the liquid delivery hose 62 is connected with the inside of the translation seat 56, and the front end of the cylinder 61 is fixedly connected with the end of the translation seat 56.

[0035] Working principle:

[0036] The steel pipe inner hole automatic graphite spraying device is used for the same specification metal steel pipe which needs heat treatment. The graphite coating is sprayed on the inner wall of the metal steel pipe. The graphite material can resist high temperature and also can prevent rust and corrosion. The quality of the steel pipe inner hole is improved. The control box 3 is controlled by the electric control cabinet of the PLC control system. The system can set various electrical signal parameters through the computer. Combined with the remaining electronic elements, the steel pipe can be automatically identified. The graphite spraying device is automatically started and stopped. The automation is realized.

[0037] Graphite spraying structure of the steel pipe inner hole automatic graphite spraying device:

[0038] The inner diameters of the two fixed rings 51 are the same. The steel pipe body 4 of the corresponding size can be inserted into the inside of the two fixed rings 51 to form support positioning. The translation seat 56 is made of stainless steel with a diameter smaller than the steel pipe body 4. The limiting plate 54 has an area and a diameter larger than the translation seat 56 and smaller than the inner diameter of the steel pipe body 4. The translation seat 56 can be pushed into the inside of the steel pipe body 4 by the rear cylinder 61. The connecting block 52 fixes the two scrapers 53 on both sides of the limiting plate 54. The scraper 53 is provided with a rubber ring around the edge, which can realize the fit with the inner diameter of the steel pipe body 4. The outer wall of the translation seat 56 is uniformly provided with a plurality of spray heads 55. The inside of the spray head 55 is connected with the infusion hose 62. In this way, the infusion hose 64 can deliver the graphite coating to the translation seat 56, and then the spray head 55 outside the translation seat 56 uniformly sprays. Because the plurality of spray heads 55 are circumferentially arranged outside the translation seat 56, the sprayed graphite coating can be more uniform and reasonable. The graphite coating sprayed outward by the spray head 55 can be shielded by the limiting plate 54 on both sides. In this way, the position of the graphite spraying can be limited. Then, when the cylinder 61 pushes the translation seat 56 to move to the left side of the steel pipe body 4, the outermost scraper 53 will scrape and evenly spread the graphite coating. The excess graphite coating will flow out at the end of the steel pipe body 4. When the cylinder 61 reversely pulls the translation seat 56, it will move backward. In this way, the spray head 55 performs the spraying work again. The limiting plate 54 and the scraper 53 can also repeatedly limit and spread the operation. In this way, through the back and forth graphite spraying operation, not only the excess graphite coating can be cleaned, but also the spread graphite can be more uniform;

[0039] The graphite spraying structure of the steel pipe inner hole automatic graphite spraying device:

[0040] Two drainage pipes 72 are arranged above both ends of the steel pipe structure 4, and the filter screen 71 is a stainless steel grid frame that can be pulled out upward. When the cylinder 61 pushes the translation seat 56 to slide horizontally, and the scraper 53 pushes the excess graphite out, it will directly enter the storage cavity 73 inside the support box 1 along the vertical drainage pipe 71. The liquid outlet hole 74 is connected with the liquid conveying hose 62 at the other end through the extraction pump 75. When the power supply is connected and the extraction pump 75 is started, the graphite paint inside the storage cavity 73 can be extracted and conveyed to the translation seat 56 for spraying work, which saves graphite material;

[0041] The graphite supply and pushing structure of the steel pipe inner hole automatic graphite spraying device:

[0042] The cylinder 61 is horizontally arranged above the control box 3 by means of the fixed table 64. The pulley 63 is fixedly connected to one side of the outer wall of the support box 1 and can freely rotate above the outer wall of the support box 1. The liquid conveying hose 62 is made of a rubber hose with a certain length reserved for stretching and winding. When the liquid conveying hose 62 is pulled and moved by the translation seat 56, it can be supported by the outer surface of the pulley 63 to reduce wear.

[0043] Embodiment 2: refer to the attached Figures 1-6 In this embodiment, a steel pipe inner hole automatic graphite spraying device includes a gas pump control structure 8 including a gas storage tank 81 and a control valve 84. The control valve 84 is fixedly connected to the outer wall of the control box 3. The control valve 84 is an electromagnetic valve. The opening of the control valve 84 can make the gas stored in the gas storage tank 81 delivered to the back side of the cylinder 61 to push the cylinder 61 to work forward. The inside of the control valve 84 is fixedly connected with a gas conveying pipeline 82. The gas conveying pipeline 82 serves to connect the cylinder 61 with the back side of the gas storage tank 81. One end of the gas conveying pipeline 82 is fixedly connected with the gas storage tank 81. The other end of the gas conveying pipeline 82 is connected with the cylinder 61. The top end of the outer wall of the gas conveying pipeline 82 is fixedly connected with a gas pressure gauge 83. The gas pressure gauge 83 can display the gas pressure inside the gas conveying pipeline 82 in real time, which is convenient for controlling the cylinder 61.

[0044] Working principle:

[0045] The control valve 84 is fixedly connected to the outer wall of the control box 3. The control valve 84 is an electromagnetic valve. The opening of the control valve 84 can make the gas stored in the gas storage tank 81 delivered to the back side of the cylinder 61 to push the cylinder 61 to work forward. The gas conveying pipeline 82 serves to connect the cylinder 61 with the back side of the gas storage tank 81. The top end of the outer wall of the gas conveying pipeline 82 is fixedly connected with a gas pressure gauge 83. The gas pressure gauge 83 can display the gas pressure inside the gas conveying pipeline 82 in real time, which is convenient for controlling the cylinder 61.

[0046] Although the utility model has carried on the illustration and the description through the reference preferred embodiment, but, the professional ordinary skilled person should understand, can make various changes in form and detail in the scope of claims.

Claims

1. A kind of automatic graphite spraying device in steel pipe hole, including support box (1), control box (3) and steel pipe body (4), the control box (3) is fixedly arranged at the side away from support box (1), the steel pipe body (4) is movably arranged above support box (1), it is characterized by: The outer wall of the support box (1) is fixedly connected with an observation window (2), the top end of the support box (1) is provided with a graphite automatic uniform spraying structure (5), the lower portion of the support box (1) is provided with a graphite material recycling structure (7), the upper portion of the control box (3) is provided with a cylinder conveying structure (6), and the other end of the control box (3) is provided with a gas pump control structure (8).

2. The apparatus according to claim 1, wherein: The graphite automatic uniform spraying structure (5) comprises fixed rings (51) and a translation seat (56), two fixed rings (51) are fixedly installed at the top end of the support box (1), the steel pipe body (4) is movably sleeved in the two fixed rings (51), the translation seat (56) is movably arranged in the steel pipe body (4), the two ends of the translation seat (56) are fixedly installed with limiting plates (54), the outer sides of the two limiting plates (54) are fixedly connected with connecting blocks (52), the outer sides of the plurality of connecting blocks (52) are fixedly installed with two scrapers (53), and the outer wall of the translation seat (56) is uniformly provided with a plurality of spray heads (55).

3. The automatic graphite spraying device for the inner bore of a steel pipe according to claim 1, characterized in that: The graphite material recycling structure (7) comprises a drainage pipe (72) and a liquid outlet hole (74), two drainage pipes (72) are fixedly arranged at the top ends of the two sides of the support box (1), the top ends of the two drainage pipes (72) are movably installed with filter screens (71), the inside of the support box (1) is fixedly provided with a storage cavity (73), one side of the lower end of the storage cavity (73) is fixedly connected with a liquid outlet hole (74), the outer side of the liquid outlet hole (74) is fixedly connected with a suction pump (75), and the other end of the storage cavity (73) is fixedly connected with a supplement pipe (76).

4. The apparatus according to claim 1, wherein: The cylinder conveying structure (6) comprises pulleys (63) and fixed tables (64), two fixed tables (64) are fixedly installed at the top end of the control box (3), a cylinder (61) is fixedly installed above the two fixed tables (64), the pulleys (63) are fixedly connected to one side of the outer wall of the support box (1), and the outer side of the pulley (63) is rotatably connected with a liquid conveying hose (62).

5. The apparatus according to claim 4, wherein: the graphite spraying device is arranged to spray graphite into the inner hole of the steel pipe. The lower end of the liquid conveying hose (62) is in communication with the suction pump (75), the other end of the liquid conveying hose (62) is in communication with the inside of the translation seat (56), and the front end of the cylinder (61) is fixedly connected with the end of the translation seat (56).

6. The apparatus according to claim 1, wherein: The gas pump control structure (8) comprises a gas storage tank (81) and a control valve (84), the control valve (84) is fixedly connected to the outer wall of the control box (3), the inner side of the control valve (84) is fixedly connected with a gas conveying pipeline (82), one end of the gas conveying pipeline (82) is fixedly connected with the gas storage tank (81), the other end of the gas conveying pipeline (82) is in communication with the cylinder (61), and the outer wall top end of the gas conveying pipeline (82) is fixedly connected with a gas pressure gauge (83).

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