Puncture equipment for LPG (Liquefied Petroleum Gas) tube

Abstract

The invention provides puncturing equipment for an LPG gas pipe, and belongs to the technical field of pipe fitting forming equipment. The problem that an existing LPG gas pipe puncturing device is low in machining efficiency is solved. The puncturing equipment for the LPG gas pipe comprises a machine frame, a mounting base is fixed to the machine frame, puncturing wheels are distributed on the mounting base in the circumferential direction, puncturing needles are arranged on the wheel faces of the puncturing wheels, a transmission belt is arranged on the machine frame, a sliding base is connected to the machine frame in a sliding mode, a lifting base is arranged on the sliding base, a connecting rod is arranged on the lifting base, and a cutter and a chamfering cutter are connected to the lifting base. A transmission mechanism capable of driving the chamfering tool is further arranged on the lifting seat, a material pushing seat is connected to the rack in a sliding mode, two clamping plates are arranged on the material pushing seat, a linkage piece capable of driving the material pushing seat to move forwards is arranged on the transmission belt, and a pushing rod capable of enabling the two clamping plates to be relatively close to each other and clamping a rear gas pipe is arranged on the rack. According to the puncturing equipment for the LPG gas pipe, the end of the gas pipe can be machined while puncturing is conducted, and the machining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pipe forming equipment, and relates to a piercing device for an LPG gas pipe. BACKGROUND

[0002] LPG is liquefied petroleum gas, which needs to be transported by a special gas pipe to ensure safety. The LPG gas pipe usually comprises an inner layer, a flame-retardant layer and an outer layer, and the outer layer is usually made of rubber material. However, the inner layer and the flame-retardant layer of the existing LPG gas pipe may leak to a certain extent during use. The amount of gas leakage between the flame-retardant layer and the rubber outer layer is very small, but the amount of gas will increase over time, and a bulge will appear on the rubber outer layer. When the bulge gradually becomes larger, there is a safety hazard of explosion. Therefore, piercing can be performed on the rubber outer layer to allow the leaked gas to be directly discharged from the rubber outer layer, thereby avoiding the accumulation of leaked gas and forming a safety hazard. At present, the piercing process of the LPG gas pipe usually adopts a pressing seat with a piercing needle, and the LPG gas pipe is placed flat on the workbench. The pressing seat is held by hand to press and pierce the LPG gas pipe, which is time-consuming and laborious, and the processing efficiency is low. After the piercing length is set, the LPG gas pipe needs to be cut off, and then the cut surface is chamfered to facilitate the subsequent installation of the pipe joint. The overall processing efficiency is relatively low. SUMMARY

[0003] The present application belongs to the technical field of pipe forming equipment, and relates to a piercing device for an LPG gas pipe.

[0004] The purpose of the present application can be achieved by the following technical solutions: a piercing device for LPG gas pipes, comprising a frame, a cylindrical mounting seat fixed on the frame, characterized in that a plurality of rotatable piercing wheels are distributed circumferentially on the mounting seat, the side surfaces of the plurality of piercing wheels are arranged radially along the mounting seat, a plurality of radial protruding piercing needles are circumferentially arranged on the wheel surface of the piercing wheel, a transmission belt is arranged on the frame, the front part of the transmission belt is located on the front side of the mounting seat, a traction belt capable of clamping the gas pipe and pulling it forward is arranged on the frame, a sliding seat is slidably connected to the frame along the front-rear direction on the rear side of the mounting seat, a lifting seat capable of lifting is arranged on the sliding seat, the rear part of the transmission belt is located on the rear side of the mounting seat, a connecting rod capable of being positioned on the rear part of the transmission belt when the lifting seat is lowered and synchronously moving the sliding seat with the transmission belt is arranged on the lifting seat, a cutting knife and a chamfering knife are connected to the lifting seat, the cutting edge of the cutting knife faces downward, the chamfering knife is rotationally connected above the cutting knife and is arranged forward, a transmission mechanism capable of driving the chamfering knife to rotate and move forward when the cutting knife cuts off the gas pipe and the chamfering knife is lowered to be opposite to the section of the front gas pipe is arranged on the lifting seat, a pushing seat is slidably connected to the frame along the front-rear direction on the rear side of the sliding seat, two clamping plates are arranged on the pushing seat, a linkage capable of driving the pushing seat to move forward when the chamfering knife is opposite to the section of the front gas pipe is arranged on the transmission belt, and a push rod capable of relatively approaching and clamping the rear gas pipe when the pushing seat moves forward is arranged on the frame.

[0005] The traction belt is responsible for pulling the gas pipe forward, the mounting seat is responsible for punching holes in the gas pipe, the cutter on the sliding seat is responsible for cutting the gas pipe with holes, the chamfering cutter is responsible for chamfering the section of the gas pipe cut off in front, and the clamping plate on the pushing seat is responsible for pushing the gas pipe behind forward to be clamped by the traction belt, and the traction belt, the punching wheel, the sliding seat and the pushing seat are linked through the transmission belt, specifically, when processing, the gas pipe is sequentially passed between the two clamping plates, below the cutter, through the hole in the mounting seat and between the punching wheels, and is clamped by the traction belt and the transmission belt, the transmission belt and the traction belt pull the gas pipe forward, the needle on the punching wheel inserts into the gas pipe and rotates under the driving of the gas pipe, that is, the needle on the punching wheel can be inserted and pulled out in order, and the gas pipe is sequentially punched, when the length of the gas pipe with holes reaches the set value, the lifting seat is lowered to make the connecting rod positioned on the transmission belt, the transmission belt drives the sliding seat to move synchronously through the connecting rod, and the gas pipe is clamped and pulled by the transmission belt, so the gas pipe moves synchronously with the traction belt, that is, the cutter moves synchronously with the gas pipe below, as the lifting seat continues to descend, the cutter can cut the gas pipe, until the chamfering cutter is opposite to the section of the gas pipe in front, the transmission mechanism can drive the chamfering cutter to rotate and move forward, so the chamfering cutter can process the inclined chamfer on the edge of the section of the gas pipe in front, since the gas pipe is cut off, the gas pipe behind loses the traction, for this purpose, the pushing seat is arranged, the linkage on the transmission belt can drive the pushing seat to move forward, during the movement, the top pushing rod can make the two clamping plates relatively close and clamp the gas pipe behind, the transmission belt pushes the gas pipe forward through the clamping plate on the pushing seat, until the front end of the gas pipe behind passes through the hole in the mounting seat and is clamped by the traction belt and the transmission belt, and the next gas pipe is processed.

[0006] The traction belt, the sliding seat and the pushing seat are linked through the same transmission belt, which not only reduces the power source, but also makes the synchronization of each functional component higher, and the arrangement of the cutter and the chamfering cutter enables continuous processing of the end of the pipe after the hole is punched, improving the processing efficiency, especially through the structure of the synchronous movement of the sliding seat and the transmission belt, so the cutter and the chamfering cutter can cut and chamfer during the movement of the gas pipe, without stopping the gas pipe, which further improves the continuity and efficiency of the processing, and the arrangement of the pushing seat and the clamping plate enables the gas pipe to move forward under the driving of the transmission belt without losing traction, without manual feeding, improving the processing efficiency.

[0007] In the above-mentioned piercing device for LPG gas pipe, two vertical columns are fixed vertically on the upper side of the sliding base, the top of the two vertical columns is connected by a top plate, the lifting seat is below the top plate, and the two ends of the lifting seat are respectively slidably sleeved on the two vertical columns, a gas cylinder with a piston rod downwardly and fixedly connected with the lifting seat is vertically fixed on the top plate, the cutter and the chamfering cutter are below the lifting seat and are vertically slidably connected with the lifting seat by two vertical guide rods, a cutter seat is further fixed between the two vertical columns and is below the cutter, the transmission mechanism is arranged between the lifting seat and the chamfering cutter, and when the cutter abuts against the cutter seat and cannot continue to descend, the lifting seat continues to descend and drives the chamfering cutter to rotate through the transmission mechanism. The cutter and the chamfering cutter are vertically slidably connected with the lifting seat by the guide rods, the lifting seat descends synchronously with the cutter driven by the gas cylinder, the cutter cuts off the gas pipe below, until the cutter abuts against the cutter seat below and cannot continue to descend, at this time, the chamfering cutter is opposite to the section of the gas pipe in front, at this time, the lifting seat can continue to descend and drive the chamfering cutter to rotate and move forward through the transmission mechanism, that is, the cutter and the chamfering cutter are sequentially operated by one gas cylinder, the power source is reduced, and the order of the process is ensured.

[0008] In the above-mentioned piercing device for LPG gas pipe, one end of the lifting seat has a protruding connecting part, a connecting hole is formed in the connecting part, the lower part of one vertical column is fixed with a connecting sleeve, the upper end of the connecting rod penetrates the connecting hole upwardly and has a connecting ring, the lower end of the connecting rod penetrates the connecting sleeve vertically downwardly, a connecting spring is further sleeved on the connecting rod, the upper side of the connecting strip is provided with a long strip-shaped connecting groove in the length direction, the lower end of the connecting rod can be inserted into the connecting groove when the connecting strip moves below the connecting rod and the lifting seat descends, and a reset spring is further arranged between the rack and the sliding base. The position of the connecting strip on the transmission belt is monitored by the sensor arranged on the rack, the lifting seat descends when the connecting strip moves below the connecting rod, the lower end of the connecting rod is inserted into the connecting groove of the connecting strip in advance, until the lower end of the connecting rod abuts against the rear groove wall of the connecting groove to realize the synchronous movement of the sliding base, the transmission belt and the gas pipe, at this time, the position opposite to the cutting edge of the cutter is the position that the gas pipe needs to be cut off, with the continuous descent of the lifting seat, the lifting seat compresses the connecting spring and moves relative to the connecting rod, that is, the connecting rod is always inserted downwardly in the connecting groove and does not affect the continuous descent of the lifting seat, until the chamfering cutter chamfers the section of the gas pipe in front, and then the lifting seat rises and resets, until the connecting rod is separated from the connecting groove, the sliding base loses the linkage of the connecting strip and can move backwardly under the action of the reset spring.

[0009] In the above-mentioned LPG gas pipe piercing device, two guide holes are formed in the lifting seat, the upper ends of the two guide rods respectively pass through the two guide holes upward and have a hanging part, the lower ends of the two guide rods are vertically fixed with a cutter rod, the cutter is in the shape of a rectangular plate, the two side edges of the cutter are respectively fixed on the two cutter rods by bolts, the lower edge of the cutter is a cutting edge and is lower than the lower end of the cutter rod, a buffer spring is further sleeved on the guide rod and acts between the lifting seat and the cutter rod, an avoiding notch is formed in the cutter seat, when the lifting seat is lowered to the lower end of the cutter rod abutting against the cutter seat, the lower part of the cutter can be inserted into the avoiding notch, and the chamfering cutter can be opposite to the front gas pipe section. The lifting seat is lowered to cut the gas pipe and insert the cutter into the avoiding notch until the cutter rod abuts against the cutter seat, at this time, the chamfering cutter is opposite to the front gas pipe section, the lifting seat compresses the buffer spring to continue to lower, so that the chamfering cutter is rotated and moved forward by the transmission mechanism.

[0010] In the above-mentioned LPG gas pipe piercing device, the chamfering cutter includes a disc-shaped cutter disc, a cutter barrel is fixed on the side of the cutter away from the mounting seat along the front-rear direction, a through hole is formed in the cutter and communicates with the cutter barrel, the cutter disc is arranged in the cutter barrel and is threadedly connected with the inner periphery of the cutter barrel, a plurality of cutter blades are circumferentially fixed on the side of the disc of the cutter disc facing the mounting seat, and the cutter blades are inclined and have cutting edges facing the mounting seat, the transmission mechanism includes a gear rotatingly connected in the cutter barrel and a gear rack fixed on the upper end of the lifting seat, a central hole is formed in the gear, a transmission shaft is fixed on the cutter disc, the transmission shaft slides through the central hole along the front-rear direction and is circumferentially positioned with the gear by spline cooperation, an avoiding hole is vertically formed in the cutter barrel, and the lower end of the gear rack vertically passes through the avoiding hole and engages with the gear. Although the cutter barrel protrudes backward from the rear side of the cutter, after the cutter cuts the gas pipe downward, the front gas pipe can continue to move forward under the traction force, and the rear gas pipe stops due to the temporary loss of traction force, so that a gap is formed between the rear section of the front gas pipe and the front section of the rear gas pipe, and the cutter barrel can be lowered to the gap, so that the cutter disc is opposite to the rear section of the front gas pipe. With the continuous lowering of the lifting seat, the gear rack can drive the gear to rotate, and the gear is circumferentially positioned with the cutter disc, so that the cutter disc can be rotated, and the transmission shaft on the cutter disc is relatively slidably arranged with the gear, and the cutter disc is threadedly connected with the cutter barrel, so that the cutter disc can move forward when the cutter disc rotates, thereby chamfering the section of the front gas pipe, and the gear rack can drive the gear to reversely rotate when the lifting seat is raised, thereby resetting the cutter disc.

[0011] In the aforementioned LPG gas pipe piercing device, the cutter has a protruding limiting flange on its side facing the mounting base. This limiting flange is U-shaped and surrounds the through hole, with its opening facing downwards. A strip-shaped groove is formed on the inner surface of both ends of the limiting flange, and a long strip-shaped limiting spring is connected within the groove. The middle portions of the two limiting springs protrude relative to each other. During the process of the cutter cutting the gas pipe, a downward force is exerted on the gas pipe. Although the front gas pipe is supported by the cutter holder, its end position may still deform downwards, affecting the positional accuracy of the cross-section. Therefore, a limiting flange and limiting springs are provided on the front side of the cutter. After the cutter cuts, the limiting flange can be pressed downwards against the end of the front gas pipe, and the limiting springs can be pressed upwards against the lower part of the end of the front gas pipe, thereby supporting and positioning the rear end of the front gas pipe, ensuring its positional accuracy, and thus improving the processing quality of the chamfering cutter.

[0012] In the aforementioned LPG gas pipe piercing device, the upper side of the pusher seat has two opposing vertical plates. Both clamping plates are arc-shaped and located between the two vertical plates, with their recesses facing each other. Each clamping plate has a sliding rod on its outer surface, and these sliding rods are slidably connected to the two vertical plates laterally. The outer ends of the sliding rods pass through the vertical plates and are connected to mounting plates. Vertical mounting holes with downward-facing openings are provided on the mounting plates. A connecting pin is connected to the mounting hole via a fixing spring. A pusher wheel is connected to the lower end of the connecting pin. There are two push rods, with the front ends of the two push rods being straight and set in the front-to-back direction. The rear ends of the two push rods are both bent outward to form inclined push sections. Each slide rod is fitted with a tension spring. The two push wheels are located between the two push sections and abut against the inner side of the push rod under the action of the tension spring. When the push seat moves forward, the two push wheels can roll along the inner side of the push rod, causing the two clamping plates to move closer to each other. The inner side of the push rod near the slide seat also has a long strip-shaped lifting part. The front end of the lifting part is inclined upward and flush with the upper side of the push rod. When the pusher seat moves forward, the pusher wheel can roll along the inner side of the pusher rod. When the pusher rolls along the inclined pusher section, the two clamping plates move closer to each other until the pusher wheel abuts against the inner side of the straight part of the pusher rod. At this time, the two clamping plates have clamped the gas tube and pushed it forward. The straight part of the pusher rod is relatively long, which allows the pusher seat to push the gas tube a long distance until the front end of the gas tube is clamped by the traction belt and the transmission belt. Then the lower end of the pusher wheel can abut against the upper side of the lifting part and slide along the upper side of the lifting part. The connecting pin is pushed upward and separated from the inner side of the pusher rod. Under the action of the tension spring, the two clamping plates separate and release the gas tube.

[0013] In the aforementioned LPG gas pipe piercing device, the linkage includes an insert rod, a guide tube is fixed laterally between the two vertical plates, one end of the insert rod is slidably inserted into the guide tube, a pre-tension spring acting on the insert rod is provided in the guide tube, the outer end of the insert rod extends out of the guide tube and faces the transmission belt, a vertically arranged push plate is fixed at the outer end of the insert rod and faces the transmission belt, a vertically arranged pusher is also fixed on the outer side of the transmission belt, when the cutter descends to the chamfering blade and faces the front gas pipe section, the pusher can abut forward against the rear side of the push plate, a reset pin is also vertically fixed on the upper side of the insert rod, a reset guide rod is fixed on the outer side of the front end of the push rod, the rear end of the reset guide rod is inclined outward, when the slide moves forward and approaches the slide, the reset pin can slide along the inner side of the reset guide rod and push the insert rod inward under the action of the reset guide rod, so that the push plate separates from the pusher, a reset tension spring is connected between the pusher seat and the rear end of the frame. When the chamfering cutter is opposite the front gas pipe section, the pusher on the transmission belt moves forward to abut against the push plate, thus pushing the pusher seat forward. When the pusher seat approaches the slide, that is, when the front end of the rear gas pipe has been clamped by the traction belt and the transmission belt, the reset pin can abut against the inner side of the reset guide rod. Under the action of the inclined reset guide rod, the reset pin pushes the insert rod inward, causing the push plate to move relative to the pusher until the push plate disengages from the pusher. The pusher continues to move forward with the transmission belt, while the pusher seat moves backward to reset under the action of the reset tension spring. The insert rod and the push plate move to reset under the action of the preload spring.

[0014] In the aforementioned LPG gas pipe piercing device, a drive wheel and several tensioning wheels are rotatably connected to the frame. A transmission belt is fitted onto the drive wheel and tensioning wheels. The transmission belt forms a straight drive section on the front side of the mounting base, arranged front and back. The frame is laterally slidably connected to a clamping seat on the front side of the mounting base. The clamping seat is U-shaped, with its opening facing the drive section. Two clamping wheels are rotatably connected inside the clamping seat. A traction belt is fitted onto the two clamping wheels, with its outer side straight and directly opposite the drive section of the transmission belt. An elastic retaining spring is also provided between the clamping seat and the frame, and under the action of the elastic retaining spring, the clamping seat tends to move closer to the drive section. A drive motor is also provided on the frame, and the drive motor is connected to the drive wheel. When the front end of the gas pipe is inserted between the drive section of the transmission belt and the traction belt, the elastic retaining spring causes the traction belt to clamp the gas pipe, achieving clamping of the gas pipe. The transmission belt is driven by the drive motor, achieving synchronization between the transmission belt and the gas pipe.

[0015] In the aforementioned LPG gas pipe piercing device, several mounting brackets are connected to the front side of the mounting base. These mounting brackets are evenly distributed circumferentially, and each mounting bracket has a radially arranged mounting groove. The inner end of the mounting groove extends through and radially toward the axis of the mounting base. The piercing wheel is rotatably connected within the mounting groove, and the wheel surface of the piercing wheel protrudes from the inner end of the mounting groove. The mounting bracket can be fixed to the mounting base or slidably connected to the mounting base radially. In this case, the mounting base and mounting bracket can adopt a six-jaw chuck structure, allowing for adjustment of the radial position of the piercing wheel.

[0016] Compared with existing technologies, this LPG gas pipe piercing device has the following advantages:

[0017] 1. Since the traction belt, slide, and pusher are linked by the same transmission belt, the power source is reduced and the synchronization of each functional component is improved.

[0018] 2. The presence of the cutting and chamfering blades allows for continuous processing of the ends after piercing, improving processing efficiency.

[0019] 3. Due to the structure of synchronous movement of the slide and the transmission belt, the cutter and chamfering blade can cut and chamfer during the movement of the gas tube without stopping the gas tube, which improves the continuity and efficiency of processing. The pusher seat and clamping plate allow the gas tube, which has lost its traction force, to continue to move forward under the drive of the transmission belt without manual feeding, thus improving processing efficiency. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the piercing device.

[0021] Figure 2 This is a three-dimensional structural diagram of a piercing device with a gas tube placed on it.

[0022] Figure 3 This is a top view of the piercing device.

[0023] Figure 4 yes Figure 3 The structural cross-sectional view at point AA.

[0024] Figure 5 yes Figure 4 Enlarged view of the structure at point B.

[0025] Figure 6 yes Figure 1 Enlarged view of the structure at point C.

[0026] Figure 7 yes Figure 3 A partial structural cross-sectional view at point DD.

[0027] Figure 8 yes Figure 1 Enlarged view of the structure at point E in the middle.

[0028] Figure 9 yes Figure 3 A partial structural cross-sectional view at point FF.

[0029] Figure 10 yes Figure 4 Enlarged view of the structure at point G.

[0030] Figure 11 This is a partial structural cross-sectional view of the piercing device at the gear.

[0031] Figure 12 yes Figure 1 Enlarged view of the structure at point H.

[0032] Figure 13 This is a partial structural cross-sectional view of the piercing device at the limiting protrusion.

[0033] Figure 14 yes Figure 3 A partial structural cross-sectional view at point II.

[0034] In the diagram, 1. Frame; 2. Mounting base; 21. Mounting bracket; 211. Mounting groove; 22. Piercing wheel; 221. Piercing needle; 3. Drive belt; 31. Connecting strip; 311. Connecting groove; 32. Push-pull; 33. Drive section; 34. Drive wheel; 35. Tensioning wheel; 36. Drive motor; 4. Slide; 41. Column; 411. Top plate; 412. Connecting sleeve; 42. Lifting base; 421. Connecting part; 422. Connecting hole; 423. Guide hole; 43. Connecting rod; 431. Connecting spring; 44. Cutter; 441. Cutter bar; 442. Guide rod; 443. Buffer spring; 444. Cutter barrel; 445. Clearance hole; 446. Limiting flange; 447. Strip groove; 448. Limiting spring; 45. Chamfer. 451. Cutter head; 452. Drive shaft; 453. Blade; 46. Cutter holder; 461. Clearance notch; 47. Cylinder; 48. Return spring; 5. Transmission mechanism; 51. Gear; 511. Center hole; 52. Rack; 6. Pusher seat; 61. Vertical plate; 62. Guide tube; 63. Insert rod; 631. Push plate; 632. Return pin; 64. Preload spring; 65. Return tension spring; 7. Clamping plate; 71. Slide rod; 72. Mounting plate; 721. Mounting hole; 73. Connecting pin; 74. Push wheel; 75. Fixed spring; 76. Tension spring; 8. Push rod; 81. Push section; 82. Lifting part; 83. Return guide rod; 9. Pressure seat; 91. Pressure wheel; 92. Traction belt; 93. Elastic snap ring. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] like Figure 1 , Figure 2 , Figure 3 As shown, a piercing device for LPG gas pipes includes a frame 1, on which a cylindrical mounting base 2 is fixed. Several mounting brackets 21 are connected to the front side of the mounting base 2. These mounting brackets 21 are evenly distributed circumferentially, and each mounting bracket 21 has a radially arranged mounting groove 211. The inner end of the mounting groove 211 extends through and radially faces the axis of the mounting base 2. A piercing wheel 22 is rotatably connected within each mounting groove 211, and the wheel surface of the piercing wheel 22 protrudes from the inner end of the mounting groove 211. The sides of the piercing wheels 22 are radially arranged along the mounting base 2, and each piercing wheel 22 has several radially protruding piercing needles 221 on its wheel surface. Figure 4 to Figure 7 As shown, a drive wheel 34 and several tension wheels 35 are rotatably connected to the frame 1. A transmission belt 3 is fitted on the drive wheel 34 and several tension wheels 35. The front part of the transmission belt 3 forms a straight drive section 33 on the front side of the mounting base 2. The frame 1 is slidably connected to the clamping seat 9 on the front side of the mounting base 2. The clamping seat 9 is U-shaped and the opening of the clamping seat 9 faces the drive section 33. Two clamping wheels 91 are rotatably connected inside the clamping seat 9. A traction belt 92 is fitted on the two clamping wheels 91. The outer side of the traction belt 92 is straight and faces the drive section 33 of the transmission belt 3. An elastic retaining spring 93 is also provided between the clamping seat 9 and the frame 1. Under the action of the elastic retaining spring 93, the clamping seat 9 tends to move closer to the drive section 33. A drive motor 36 is also provided on the frame 1. The drive motor 36 is connected to the drive wheel 34. A slide block 4 is slidably connected to the rear side of the mounting base 2 in the front-to-back direction. A lifting seat 42 capable of being raised and lowered is provided on the slide block 4. The rear part of the transmission belt 3 is located behind the mounting base 2. Figure 8 As shown, the lifting seat 42 is equipped with a connecting rod 43 that can be positioned at the rear of the transmission belt 3 when it descends, and make the slide 4 move synchronously with the transmission belt 3. The lifting seat 42 is connected with a cutter 44 and a chamfering cutter 45. The cutting edge of the cutter 44 faces downward, and the chamfering cutter 45 is rotatably connected above the cutter 44 and is set forward. The lifting seat 42 is also equipped with a transmission mechanism 5 that can drive the chamfering cutter 45 to rotate and move forward when the cutter 44 cuts the gas pipe and the chamfering cutter 45 descends to face the cross-section of the gas pipe in front. The frame 1 is also slidably connected to a pusher seat 6 in the front-back direction on the rear side of the slide 4. The pusher seat 6 is equipped with two clamping plates 7. The transmission belt 3 is equipped with a linkage that can drive the pusher seat 6 to move forward when the chamfering cutter 45 faces the cross-section of the gas pipe in front. The frame 1 is equipped with a pusher rod 8 that can make the two clamping plates 7 close together and clamp the gas pipe behind when the pusher seat 6 moves forward.

[0037] Specifically Figure 9 As shown, two columns 41 are vertically fixed on the upper side of the slide block 4. The tops of the two columns 41 are fixedly connected to each other through the top plate 411. The lifting seat 42 is located below the top plate 411, and the two ends of the lifting seat 42 are slidably sleeved on the two columns 41 respectively. A cylinder 47 with the piston rod facing downward and fixedly connected to the lifting seat 42 is vertically fixed on the top plate 411. One end of the lifting seat 42 has a protruding connecting part 421, and a connecting hole 422 is provided on the connecting part 421. A connecting sleeve 412 is fixed to the lower part of one of the columns 41. The upper end of the connecting rod 43 passes through the connecting hole 422 upward and has a connecting ring. The lower end of the connecting rod 43 passes vertically downward through the connecting sleeve 412. A connecting spring 431 is also sleeved on the connecting rod 43. The upper end acts on the connecting part 421 and causes the connecting rod 43 to have a downward tendency. A long strip-shaped connecting bar 31 is connected to the outer side of the transmission belt 3. A long strip-shaped connecting groove 311 is provided on the upper side of the connecting bar 31 along the length direction. When the connecting bar 31 moves to the lower part of the connecting rod 43 and the lifting seat 42 descends, the lower end of the connecting rod 43 can be inserted downward into the connecting groove 311. A return spring 48 is also provided between the frame 1 and the slide 4. When the connecting rod 43 is separated from the connecting bar 31, the return spring 48 can push the slide 4 to move backward to reset. The lifting seat 42 has two guide holes 423, and guide rods 442 slide vertically through each guide hole 423. The upper ends of the two guide rods 442 pass upward through the two guide holes 423 and have a hook-on part. The lower ends of the two guide rods 442 are vertically fixed with knife bars 441. The cutter 44 is rectangular plate-shaped, and the two edges of the cutter 44 are fixed to the two knife bars 441 by bolts. The lower edge of the cutter 44 is the cutting edge and is lower than the lower end of the knife bar 441. A buffer spring 443 is also sleeved on the guide rod 442, acting between the lifting seat 42 and the knife bar 441. Under the action, the cutter 44 tends to move downward. A cutter holder 46 is also fixed between the two columns 41. The cutter holder 46 is located below the cutter 44. A long strip-shaped clearance notch 461 is opened on the cutter holder 46. The transmission mechanism 5 is set between the lifting seat 42 and the chamfering cutter 45. When the lifting seat 42 descends to the point where the lower end of the cutter bar 441 abuts against the cutter holder 46, the lower part of the cutter 44 can be inserted into the clearance notch 461, and the chamfering cutter 45 is opposite to the cross-section of the gas pipe in front. When the cutter 44 descends to abut against the cutter holder 46, the lifting seat 42 continues to descend and drives the chamfering cutter 45 to rotate through the transmission mechanism 5.

[0038] The chamfering cutter 45 includes a disc-shaped cutter head 451. A cutter tube 444 is fixed to the side of the cutter 44 facing away from the mounting base 2 along the front-rear direction. A through hole is also formed in the cutter 44, communicating directly with the cutter tube 444. The cutter head 451 is disposed inside the cutter tube 444, and the outer circumferential surface of the cutter head 451 is threadedly connected to the inner circumferential surface of the cutter tube 444. Several blades 453 are circumferentially fixed at the edge of the disc surface facing the mounting base 2. All blades 453 face the mounting base 2 and have inclined cutting edges. Figure 10 , Figure 11 As shown, the transmission mechanism 5 includes a gear 51 and a rack 52. The gear 51 has a connecting pipe at its center, which is rotatably connected to the inner circumferential surface of the cutter barrel 444. A central hole 511 communicating with the connecting pipe is formed on the gear 51. A transmission shaft 452 is fixed on the cutter disc 451. This transmission shaft 452 slides through the connecting pipe and the central hole 511 in the front-to-back direction and is circumferentially positioned with the gear 51 via a spline engagement. A clearance hole 445 is formed vertically on the cutter barrel 444. The upper end of the rack 52 is fixed to the lifting seat 42, and the lower end of the rack 52 passes vertically downward through the clearance hole 445 and meshes with the gear 51. Figure 12 , Figure 13 As shown, the cutter 44 has a protruding limiting flange 446 on the side facing the mounting base 2. The limiting flange 446 is U-shaped and surrounds the through hole, with the opening of the limiting flange 446 facing downward. A strip groove 447 is provided on the inner side of both ends of the limiting flange 446. A long strip-shaped limiting spring piece 448 is connected in the strip groove 447, and the middle parts of the two limiting spring pieces 448 protrude relative to each other.

[0039] Combination Figure 14As shown, the upper side of the pusher seat 6 has two opposing vertical plates 61. Two clamping plates 7 are both arc-shaped and located between the two vertical plates 61, with their recesses facing each other. Each clamping plate 7 has a sliding rod 71 on its outer surface, and the sliding rods 71 ​​of the two clamping plates 7 are slidably connected to the two vertical plates 61 laterally. The outer ends of the sliding rods 71 ​​pass through the vertical plates 61 and are connected to mounting plates 72. A vertically opening mounting hole 721 with its opening facing downwards is provided on the mounting plate 721. A connecting pin 73 is connected to the mounting hole 721 via a fixing spring 75. The lower end of the connecting pin 73 is connected to a pusher wheel 74. There are two pusher rods 8. The front ends of the two push rods 8 are straight and set in the front-to-back direction. The rear ends of the two push rods 8 are bent outward to form inclined push sections 81. Tension springs 76 are fitted on the slide rods 71. The two push wheels 74 are located between the two push sections 81 and abut against the inner side of the push rods 8 under the action of the tension springs 76. When the push seat 6 moves forward, the two push wheels 74 can roll along the inner side of the push rods 8 so that the two clamps 7 are relatively close. The inner side of the push rod 8 near the slide seat 4 also has a long strip-shaped lifting part 82. The front end of the lifting part 82 is inclined upward and flush with the upper side of the push rod 8. The linkage includes a rod 63, a guide tube 62 fixed laterally between the two upright plates 61, one end of the rod 63 being slidably inserted into the guide tube 62, a preload spring 64 acting on the rod 63 being provided inside the guide tube 62, the outer end of the rod 63 extending out of the guide tube 62 and facing the transmission belt 3, a vertically arranged push plate 631 fixed to the outer end of the rod 63 and facing the transmission belt 3, and a vertically arranged pusher 32 fixed to the outer surface of the transmission belt 3. When the cutter 44 descends to the point where the chamfering cutter 45 is opposite the cross-section of the front gas pipe, the pusher 3... 2 can abut against the rear side of the push plate 631. A reset pin 632 is also vertically fixed on the upper side of the insert rod 63. A reset guide rod 83 is fixed on the outer side of the front end of the push rod 8. The rear end of the reset guide rod 83 is inclined outward. When the slide 4 moves forward and approaches the slide 4, the reset pin 632 can slide along the inner side of the reset guide rod 83 and push the insert rod 63 inward under the action of the reset guide rod 83, so that the push plate 631 is separated from the pusher 32. A reset tension spring 65 is connected between the pusher seat 6 and the rear end of the frame 1.

[0040] During processing, the gas tube is passed sequentially from back to front through the space between the two clamping plates 7, below the cutter 44, through the inner hole of the mounting base 2, and between several piercing wheels 22. It is then clamped by the traction belt 92 and the transmission belt 3. The drive motor 36 drives the transmission belt 3 via the drive wheel 34. The transmission belt 3 and the traction belt 92 pull the gas tube forward. The piercing needles 221 on the piercing wheels 22 are inserted into the outer wall of the gas tube. As the gas tube moves forward, the piercing wheels 22 roll along the outer wall of the gas tube, causing the piercing needles 221 to be inserted and withdrawn sequentially. When the length of the pierced gas tube reaches the specified length... When the set value is reached, cylinder 47 drives the lifting seat 42 to descend, and the lower end of the connecting rod 43 is inserted into the connecting groove 311 of the connecting bar 31. When the rear wall of the connecting groove 311 abuts against the lower end of the connecting rod 43, the sliding seat 4 moves synchronously. Cylinder 47 drives the lifting seat 42 to continue descending, and the connecting rod 43 compresses the connecting spring 431 and remains inserted in the connecting groove 311. The cutter 44 descends and cuts off the gas pipe until the lower end of the cutter bar 441 abuts against the cutter holder 46 and can no longer descend. At this time, the chamfering cutter 45 is aligned with the cross-section of the gas pipe in front. At this time, the pusher 32 on the transmission belt 3 abuts against the push plate on the insert rod 63. The transmission belt 3 drives the pusher seat 6 to move synchronously. During the movement, the pusher wheel 74 rolls along the inner side of the pusher rod 8, so that the two clamping plates 7 come closer together and clamp the gas pipe behind, thereby pushing the gas pipe behind forward. The lifting seat 42 continues to descend, the cutter bar 441 compresses the buffer spring 443, the rack 52 descends and drives the gear 51 to rotate, the gear 51 drives the cutter disc 451 to rotate, the cutter disc 451 moves forward under the action of the external thread, so that the blade 453 chamfers the edge of the gas pipe section. Then the cylinder 47 drives the lifting seat 42 to reset until the connecting rod 43 separates from the connecting bar 31. The slide 4 resets under the action of the reset spring 48. The pusher pushes the front end of the rear gas pipe between the traction belt 92 and the transmission belt 3. Then the bottom of the pusher wheel 74 abuts against the upper side of the lifting part. It slides along the lifting part, and under the action of the lifting part, the connecting pin 73 moves upward, causing the push wheel 74 to disengage from the inner side of the push rod 8. Under the action of the tension spring 76, the two clamps 7 release the gas pipe, while the push wheel 74 abuts against the top surface of the push rod 8 under the action of the fixing spring 75, until the reset pin 632 on the insertion rod 63 abuts against the reset guide rod 83 on the push rod 8. The reset guide rod 83 pushes the reset pin 632, causing the insertion rod 63 to retract, the push plate to separate from the pusher 32 on the transmission belt 3, and the push seat moves backward to reset under the action of the reset tension spring 65.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0042] Although this document frequently uses terms such as rack 1, mounting base 2, and mounting bracket 21, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A piercing device for LPG gas pipes, comprising a frame (1), wherein a cylindrical mounting base (2) is fixed on the frame (1), characterized in that, The mounting base (2) has several rotatable perforated wheels (22) distributed circumferentially. The sides of the perforated wheels (22) are arranged radially along the mounting base (2). The perforated wheels (22) have several radially protruding needles (221) circumferentially on their surfaces. The frame (1) is provided with a transmission belt (3). The front part of the transmission belt (3) is located on the front side of the mounting base (2). The frame (1) is also provided with a traction belt (92) that can clamp the gas pipe with the front part of the transmission belt (3) and pull it forward. The frame (1) is slidably connected to a slide (4) in the front-back direction on the rear side of the mounting base (2). The slide (4) is provided with a lifting seat (42) that can be raised and lowered. The rear part of the transmission belt (3) is located on the rear side of the mounting base (2). The lifting seat (42) is provided with a connecting rod (43) that can be positioned at the rear part of the transmission belt (3) when it descends and make the slide (4) move synchronously with the transmission belt (3). The lifting seat (42) is connected to a cutter (44) and a chamfering cutter (45). The cutting edge of the cutter (44) faces downward. The chamfering cutter (45) is rotatably connected above the cutter (44) and is positioned forward. The lifting seat (42) is also provided with a transmission mechanism (5) that can drive the chamfering cutter (45) to rotate and move forward when the cutter (44) cuts the gas pipe and the chamfering cutter (45) descends to face the cross-section of the gas pipe in front. The frame (1) is also slidably connected to a pusher seat (6) in the front-back direction on the rear side of the slide seat (4). The pusher seat (6) is provided with two clamping plates (7). The transmission belt (3) is provided with a linkage that can drive the pusher seat (6) to move forward when the chamfering cutter (45) faces the cross-section of the gas pipe in front. The frame (1) is provided with a push rod (8) that can make the two clamping plates (7) close together and clamp the gas pipe behind when the pusher seat (6) moves forward.

2. The puncturing device for LPG gas pipes according to claim 1, characterized in that, Two columns (41) are vertically fixed on the upper side of the slide (4), and the tops of the two columns (41) are fixedly connected to each other through a top plate (411). The lifting seat (42) is located below the top plate (411), and the two ends of the lifting seat (42) are slidably sleeved on the two columns (41). A cylinder (47) with a piston rod pointing downward and fixedly connected to the lifting seat (42) is vertically fixed on the top plate (411). The cutter (44) and the chamfering cutter (45) are located on the lifting seat (42). Below the cutting blade (44), it is slidably connected to the lifting seat (42) via two vertically arranged guide rods (442). A blade holder (46) is also fixed between the two columns (41). The blade holder (46) is located below the cutting blade (44). The transmission mechanism (5) is set between the lifting seat (42) and the chamfering blade (45). When the cutting blade (44) descends to abut against the blade holder (46), the lifting seat (42) continues to descend and drives the chamfering blade (45) to rotate through the transmission mechanism (5).

3. The puncturing device for LPG gas pipes according to claim 2, characterized in that, One end of the lifting seat (42) has a protruding connecting part (421), and a connecting hole (422) is provided on the connecting part (421). A connecting sleeve (412) is fixed to the lower part of one of the columns (41). The upper end of the connecting rod (43) passes upward through the connecting hole (422) and has a connecting ring. The lower end of the connecting rod (43) passes vertically downward through the connecting sleeve (412). The connecting rod (43) is also fitted with a sleeve whose upper end acts on the connecting part (421) and makes the connecting rod (43)... A connecting spring (431) with a downward moving tendency is provided. A long strip connecting bar (31) is connected to the outer side of the transmission belt (3). A long strip connecting groove (311) is provided on the upper side of the connecting bar (31) along the length direction. When the connecting bar (31) moves to the bottom of the connecting rod (43) and the lifting seat (42) descends, the lower end of the connecting rod (43) can be inserted into the connecting groove (311). A return spring (48) is also provided between the frame (1) and the slide (4).

4. The puncturing device for LPG gas pipes according to claim 3, characterized in that, The lifting seat (42) has two guide holes (423). The upper ends of the two guide rods (442) pass through the two guide holes (423) and have a hanging part. The lower ends of the two guide rods (442) are vertically fixed with a knife bar (441). The cutter (44) is rectangular plate-shaped, and the two sides of the cutter (44) are fixed to the two knife bars (441) by bolts. The lower edge of the cutter (44) is the cutting edge and is lower than the knife bar (441). At the lower end, a buffer spring (443) acting between the lifting seat (42) and the knife bar (441) is also sleeved on the guide rod (442). A long strip-shaped clearance notch (461) is opened on the knife seat (46). When the lifting seat (42) descends to the lower end of the knife bar (441) and abuts against the knife seat (46), the lower part of the cutter (44) can be inserted downward into the clearance notch (461), and the chamfering knife (45) can be opposite to the gas pipe section in front.

5. The puncturing device for LPG gas pipes according to claim 4, characterized in that, The chamfering cutter (45) includes a disc-shaped cutter head (451). A cutter tube (444) is fixed on the side of the cutter (44) facing away from the mounting base (2) along the front-back direction. A through hole is also opened on the cutter (44) and communicates directly with the cutter tube (444). The cutter head (451) is set inside the cutter tube (444), and the outer circumferential surface of the cutter head (451) is threadedly connected to the inner circumferential surface of the cutter tube (444). Several blades (453) are circumferentially fixed at the edge of the disc surface of the cutter head (451) facing the mounting base (2). The blades (453) all face the mounting base (2) and are inclined. The cutting edge, the transmission mechanism (5) includes a gear (51) rotatably connected in the cutter barrel (444) and a rack (52) fixed at the upper end on the lifting seat (42). A central hole (511) is provided on the gear (51). A transmission shaft (452) is fixed on the cutter disc (451). The transmission shaft (452) slides through the central hole (511) in the front-back direction and is circumferentially positioned with the gear (51) through spline engagement. A clearance hole (445) is provided vertically on the cutter barrel (444). The lower end of the rack (52) passes vertically downward through the clearance hole (445) and meshes with the gear (51).

6. The puncturing device for LPG gas pipes according to claim 5, characterized in that, The cutter (44) has a protruding limiting flange (446) on the side facing the mounting base (2). The limiting flange (446) is U-shaped and surrounds the through hole, with the opening of the limiting flange (446) facing downward. A strip groove (447) is provided on the inner side of both ends of the limiting flange (446). A long strip-shaped limiting spring piece (448) is connected in the strip groove (447), and the middle parts of the two limiting spring pieces (448) protrude relative to each other.

7. The puncturing device for LPG gas pipes according to any one of claims 1 to 6, characterized in that, The pusher seat (6) has two opposing upright plates (61) on its upper side. The two clamping plates (7) are both arc-shaped and located between the two upright plates (61), and the recesses of the two clamping plates (7) are opposite to each other. The outer surfaces of the two clamping plates (7) each have a sliding rod (71), and the sliding rods (71) of the two clamping plates (7) are slidably connected to the two upright plates (61) in the transverse direction. The outer ends of the sliding rods (71) pass through the upright plates (61) and are connected to the mounting plates (72). The mounting plates (72) have vertically downward-facing mounting holes (721). A connecting pin (73) is connected to the mounting hole (721) by a fixing spring (75). The lower end of the connecting pin (73) is connected to a pusher wheel (74). The pusher rod (8) There are two push rods (8), and the front ends of the two push rods (8) are straight and set in the front-back direction. The rear ends of the two push rods (8) are bent outward to form an inclined push section (81). The slide rod (71) is fitted with a tension spring (76). The two push wheels (74) are located between the two push sections (81) and abut against the inner side of the push rod (8) under the action of the tension spring (76). When the push seat (6) moves forward, the two push wheels (74) can roll along the inner side of the push rod (8) so that the two clamps (7) are relatively close. The inner side of the push rod (8) near the slide seat (4) also has a long strip-shaped lifting part (82). The front end of the lifting part (82) is inclined upward and flush with the upper side of the push rod (8).

8. The puncturing device for LPG gas pipes according to claim 7, characterized in that, The linkage includes a plug rod (63), and a guide tube (62) is fixed horizontally between the two upright plates (61). One end of the plug rod (63) is slidably inserted into the guide tube (62). A preload spring (64) acting on the plug rod (63) is provided in the guide tube (62). The outer end of the plug rod (63) extends out of the guide tube (62) and faces the transmission belt (3). A vertically arranged push plate (631) facing the transmission belt (3) is fixed at the outer end of the plug rod (63). A vertically arranged pusher (32) is also fixed on the outer side of the transmission belt (3). When the cutter (44) descends to the point where the chamfering blade (45) is opposite to the cross-section of the gas pipe in front, The pusher (32) can abut against the rear side of the push plate (631). The upper side of the insert rod (63) is also vertically fixed with a reset pin (632). The outer side of the front end of the push rod (8) is fixed with a reset guide rod (83). The rear end of the reset guide rod (83) is inclined outward. When the slide (4) moves forward and approaches the slide (4), the reset pin (632) can slide along the inner side of the reset guide rod (83) and push the insert rod (63) inward under the action of the reset guide rod (83) so that the push plate (631) and the pusher (32) are separated. The pusher seat (6) and the rear end of the frame (1) are connected by a reset tension spring (65).

9. The puncturing device for an LPG gas pipe according to any one of claims 1 to 6, characterized in that, The frame (1) is rotatably connected to a drive wheel (34) and several tensioning wheels (35). The transmission belt (3) is sleeved on the drive wheel (34) and several tensioning wheels (35). The transmission belt (3) forms a straight drive section (33) on the front side of the mounting base (2) and is arranged front and back. The frame (1) is slidably connected to the clamping seat (9) on the front side of the mounting base (2). The clamping seat (9) is U-shaped and the opening of the clamping seat (9) faces the drive section (33). The frame (1) rotates within the clamping seat (9). Two clamping wheels (91) are connected, and the traction belt (92) is sleeved on the two clamping wheels (91). The outer side of the traction belt (92) is straight and faces the drive section (33) of the transmission belt (3). An elastic snap ring (93) is also provided between the clamping seat (9) and the frame (1). Under the action of the elastic snap ring (93), the clamping seat (9) tends to move closer to the drive section (33). A drive motor (36) is also provided on the frame (1). The drive motor (36) is connected to the drive wheel (34).

10. The puncturing device for an LPG gas pipe according to any one of claims 1 to 6, characterized in that, The front side of the mounting base (2) is connected to several mounting brackets (21), which are evenly distributed circumferentially. Each mounting bracket (21) has a mounting groove (211) arranged radially, and the inner end of the mounting groove (211) is arranged through and radially toward the axis of the mounting base (2). The piercing wheel (22) is rotatably connected in the mounting groove (211), and the wheel surface of the piercing wheel (22) protrudes from the inner end of the mounting groove (211).

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