A hot melt connection device for butt joint of plastic pipes

Abstract

The present invention discloses a hot melt connection device for butt joint of plastic pipes, belonging to the technical field of plastic pipe connection. It includes a main frame device, which is used to clamp the plastic pipes and drive the plastic pipes to butt joint. A locking device and a hot melt device are arranged on the main frame device. The locking device is used to cooperate with the main frame device to clamp the plastic pipes, and the hot melt device is used to hot melt the ends of the plastic pipes. The main frame device set in the present invention can automatically clamp the plastic pipes, and after clamping the plastic pipes, drive the plastic pipes to move, so as to realize the butt joint of the end of the plastic pipe with the heating sheet and melt the end of the plastic pipe, with high automation degree. After the end of the plastic pipe is melted by the hot melt device set in the present invention, it drives the rotating block to rotate, thereby driving the heating sheet to leave in front of the end of the plastic pipe. At the same time, the heating sheet will automatically retract when leaving, so as to prevent the heating sheet from damaging the melted end of the plastic pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic pipe connection, and particularly relates to a hot melt connection device for butt joint of plastic pipes. Background Art

[0002] The hot melt connection of plastic pipes is a common connection method, applicable to various plastic pipe systems, including water supply, drainage, chemical pipes, etc. This connection method forms a firm connection by heating the ports of the pipes and fittings to make them soft and contacting at a certain temperature. When the ports of the pipes and fittings reach the predetermined temperature, they are quickly joined, and it is necessary to ensure the alignment of the ports of the pipes and fittings. The hot melt connection of plastic pipes is a reliable and economical pipe connection method, widely used in construction, industry, and municipal engineering. In the prior art, for the hot melt connection of plastic pipes, the ends of the plastic pipes are usually melted and then butt-jointed by a butt-joint machine or manually. The operation process is very cumbersome, and at the same time, the automatic clamping and butt-joint of the plastic pipes cannot be realized, and the degree of automation is low. Summary of the Invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: a hot melt connection device for butt joint of plastic pipes, including a main frame device. The main frame device includes a base, and an outer slide rail is fixedly installed on the base. The main frame device is used to clamp the plastic pipe and drive the plastic pipe for butt joint. A locking device and a hot melt device are arranged on the main frame device. The locking device includes a sliding seat, and the sliding seat is fixedly installed on the outer slide rail. The locking device is used to cooperate with the main frame device to clamp the plastic pipe. The hot melt device includes an upright frame, and the upright frame is fixedly installed on the base. The hot melt device is used to heat-melt the end of the plastic pipe.

[0004] Further, the main frame device includes a screw motor fixedly installed on the base. A motor bevel gear is fixedly installed on the motor shaft of the screw motor. Two screws are rotatably installed on the base, and a screw bevel gear is fixedly installed on the screw. The screw bevel gear meshes with the motor bevel gear.

[0005] Further, two clamping mechanisms are arranged on the outer slide rail. The clamping mechanism includes an inner threaded rod and a sliding rod slidably installed on the outer slide rail. The inner threaded rod forms a threaded transmission with the screw, and the sliding rod does not contact the screw. A connecting column is fixedly installed on the sliding rod, and the inner threaded rod is slidably installed with the connecting column. A column spring is arranged between the connecting column and the inner threaded rod. Two active rotating rods are rotatably installed on the inner threaded rod, and two passive rotating rods are rotatably installed on the sliding rod. A clamping block is rotatably installed on the active rotating rod, and the clamping block is rotatably installed with the passive rotating rod.

[0006] Further, a clamping sleeve is fixedly installed on the clamping block. The clamping sleeve is made of rubber material and is used to clamp the plastic pipe.

[0007] In the initial state, the column spring is in an unloaded state. The lead screw motor rotates to drive the motor bevel gear to rotate, thereby driving the lead screw bevel gear and the lead screw to rotate, driving the two inner threaded rods to move outward simultaneously. The inner threaded rods drive the sliding rod to slide outward along the outer slide rail through the connecting column and the column spring. When the sliding rod contacts the block, the sliding rod will be blocked by the block. When the inner threaded rod continues to move outward, it will slide along the connecting column, and the column spring will be compressed. At this time, the inner threaded rod drives the active rotating rod to rotate, and the passive rotating rod rotates around the sliding rod, thereby driving the clamping block and the clamping sleeve to move outward. At this time, the two clamping sleeves open, and the plastic pipe can be placed between the two clamping sleeves. Subsequently, the lead screw motor drives the lead screw bevel gear and the lead screw to rotate through the motor bevel gear, driving the inner threaded rod to move inward towards the rotating block. Under the action of the rebound of the column spring, it drives the active rotating rod and the passive rotating rod to rotate, thereby driving the clamping block and the clamping sleeve to move inward, clamping the plastic pipe through the clamping sleeve. Subsequently, the inner threaded rod drives the sliding rod to move inward towards the rotating block through the column spring and the connecting column, thereby driving the two plastic pipes to move towards the rotating block together.

[0008] Further, the locking device includes a rotating seat fixedly installed on the outer slide rail. A sliding column is slidably installed on the sliding seat and the rotating seat respectively. A slope block is fixedly installed on the sliding column. A sliding column spring is arranged between the slope block and the sliding seat, and a sliding column spring is arranged between the slope block and the rotating seat. An outer rotating rod is rotatably installed on the slope block. A rotating rod is rotatably installed on the outer rotating rod. A block is fixedly installed on the rotating rod. The block is rotatably installed with the rotating seat, and the slope block is slidably installed with the inner threaded rod.

[0009] Further, a long groove is provided on the outer slide rail, and the block slides in the long groove of the outer slide rail.

[0010] When the inner threaded rod moves outward, the inner threaded rod pushes the slope block outward. The sliding column slides along the sliding seat and the rotating seat, and the sliding column spring is compressed. The slope block drives the outer rotating rod to rotate, thereby driving the rotating rod and the block to rotate around the rotating seat, so that the block extends out of the outer slide rail to block the sliding rod.

[0011] When the inner threaded rod moves towards the rotating block, under the action of the slope surface of the slope block, the sliding column spring rebounds continuously, driving the outer rotating rod to rotate, thereby driving the rotating rod and the block to rotate. The block no longer extends out of the outer slide rail, and the block will not block the inner threaded rod from moving towards the rotating block. The movement of the inner threaded rod and the sliding rod drives the end of the plastic pipe to contact the heating sheet. At this time, the lead screw motor stops rotating. In the initial state, the heating sheet will extend out of the end of the rotating block, and the end of the plastic pipe is heated and melted by the heating sheet.

[0012] Further, the hot melt device includes a rotating block rotatably mounted on the vertical frame. A fixed gear is fixedly mounted on the vertical frame. A rotating motor is fixedly mounted on the rotating block. A motor gear is fixedly mounted on the motor shaft of the rotating motor. An intermediate gear is rotatably mounted in the rotating block. The intermediate gear meshes with the motor gear and also meshes with the fixed gear.

[0013] Further, a retraction mechanism is provided on the rotating block. The retraction mechanism includes two turntables rotatably mounted in the rotating block. A central gear is fixedly mounted on the turntable. The central gear meshes with the intermediate gear. Three active rotating seats are rotatably mounted on the turntable. An inclined rotating rod is rotatably mounted on the active rotating seat. Two sliding plates are slidably mounted in the rotating block. A heating sheet is fixedly mounted on the sliding plate. Three passive rotating seats are rotatably mounted on the sliding plate. The passive rotating seat is rotatably mounted with the inclined rotating rod.

[0014] After the heating sheet melts the end of the plastic pipe by heating, the rotating motor rotates to drive the motor gear to rotate, thereby driving the intermediate gear to rotate. Then, under the action of the fixed gear, the rotating block rotates around the vertical frame. The rotation of the intermediate gear will also drive the central gear and the turntable to rotate simultaneously, thereby driving the active rotating seat to rotate, and then driving the 320 to rotate. The sliding plate and the heating sheet are driven to slide inward along the rotating block through the passive rotating seat, so that the heating sheet retracts while rotating with the rotating block, preventing the heating sheet from damaging the melted end of the plastic pipe during the rotation process following the rotating block. When the rotating block rotates by ninety degrees, the lead screw motor continues to rotate to drive the internal threaded rod and the sliding rod to move inward, so as to connect the two plastic pipes with melted ends.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: (1) The main frame device provided by the present invention can automatically clamp the plastic pipe, and after clamping the plastic pipe, drive the plastic pipe to move, realizing the butt joint of the end of the plastic pipe with the heating sheet and melting the end of the plastic pipe, with high automation; (2) The locking device provided by the present invention cooperates with the clamping mechanism, so that after automatically clamping the plastic pipe by the rotation of the lead screw motor, the plastic pipe is driven to move, with high automation; (3) After the end of the plastic pipe is melted by the hot melt device provided by the present invention, the rotating block is driven to rotate, thereby driving the heating sheet to leave the front of the end of the plastic pipe. At the same time, the heating sheet will automatically retract when leaving, preventing the heating sheet from damaging the melted end of the plastic pipe. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention (placement state).

[0017] Figure 2 It is a schematic diagram of the overall structure of the present invention (hot melt state).

[0018] Figure 3Schematic diagram of the overall structure of the present invention (connection state).

[0019] Figure 4 Schematic diagram of the structure of the main device of the present invention Figure 1 。

[0020] Figure 5 For the present invention Figure 4 Partial enlarged schematic diagram at position A in the present invention.

[0021] Figure 6 Schematic diagram of the clamping mechanism of the present invention (placement state).

[0022] Figure 7 Schematic diagram of the clamping mechanism of the present invention (clamping state).

[0023] Figure 8 For the present invention Figure 7 Partial enlarged schematic diagram at position B in the present invention.

[0024] Figure 9 Schematic diagram of the locking device of the present invention Figure 1 。

[0025] Figure 10 Schematic diagram of the locking device of the present invention Figure 2 。

[0026] Figure 11 Schematic diagram of the hot melting device of the present invention Figure 1 。

[0027] Figure 12 Schematic diagram of the retracting mechanism of the present invention.

[0028] Figure 13 Schematic diagram of the hot melting device of the present invention Figure 2 。

[0029] Reference numerals: 101 - base; 102 - lead screw motor; 103 - motor bevel gear; 104 - lead screw bevel gear; 105 - lead screw; 106 - outer slide rail; 107 - inner threaded rod; 108 - sliding rod; 109 - connecting column; 110 - column spring; 111 - active rotating rod; 112 - passive rotating rod; 113 - clamping block; 114 - clamping sleeve; 201 - sliding seat; 202 - sliding column; 203 - sliding column spring; 204 - slope block; 205 - outer rotating rod; 206 - rotating rod; 207 - clamping block; 208 - rotating seat; 301 - vertical frame; 302 - rotating block; 303 - rotating motor; 304 - motor gear; 305 - heating sheet; 306 - sliding disk; 307 - central gear; 308 - turntable; 309 - active rotating seat; 310 - inclined rotating rod; 311 - passive rotating seat; 312 - fixed gear; 313 - intermediate gear; 4 - plastic pipe. Detailed implementation manners

[0030] The following further describes the specific implementation manners of the present invention with reference to the accompanying drawings.

[0031] Example: Referring to Figures 1 - 13 , a hot melt connection device for butt joint of plastic pipes, including a main frame device. The main frame device includes a base 101, on which an outer slide rail 106 is fixedly installed. The main frame device is used to clamp the plastic pipes and drive the plastic pipes for butt joint. A locking device and a hot melt device are arranged on the main frame device. The locking device includes a slide seat 201, which is fixedly installed on the outer slide rail 106. The locking device is used to cooperate with the main frame device to clamp the plastic pipes. The hot melt device includes an upright frame 301, which is fixedly installed on the base 101. The hot melt device is used to perform hot melting on the ends of the plastic pipes.

[0032] As Figures 4 - 8 shown, the main frame device includes a lead screw motor 102 fixedly installed on the base 101. A motor bevel gear 103 is fixedly installed on the motor shaft of the lead screw motor 102. Two lead screws 105 are rotatably installed on the base 101. A lead screw bevel gear 104 is fixedly installed on the lead screw 105. The lead screw bevel gear 104 meshes with the motor bevel gear 103.

[0033] As Figures 4 - 8 shown, two clamping mechanisms are arranged on the outer slide rail 106. The clamping mechanism includes an inner threaded rod 107 and a sliding rod 108 slidably installed on the outer slide rail 106. The inner threaded rod 107 forms a threaded drive with the lead screw 105. The sliding rod 108 does not contact the lead screw 105. A connecting column 109 is fixedly installed on the sliding rod 108. The inner threaded rod 107 and the connecting column 109 are slidably installed. A column spring 110 is arranged between the connecting column 109 and the inner threaded rod 107. Two active rotating rods 111 are rotatably installed on the inner threaded rod 107. Two passive rotating rods 112 are rotatably installed on the sliding rod 108. A clamping block 113 is rotatably installed on the active rotating rod 111. The clamping block 113 and the passive rotating rod 112 are rotatably installed.

[0034] As Figures 4 - 8 shown, a clamping sleeve 114 is fixedly installed on the clamping block 113. The clamping sleeve 114 is made of rubber and is used to clamp the plastic pipe 4.

[0035] In the initial state, the column spring 110 is in an unloaded state. The lead screw motor 102 rotates to drive the motor bevel gear 103 to rotate, thereby driving the lead screw bevel gear 104 and the lead screw 105 to rotate, driving the two inner threaded rods 107 to move outward simultaneously. The inner threaded rod 107 drives the sliding rod 108 to slide outward along the outer slide rail 106 through the connecting column 109 and the column spring 110. When the sliding rod 108 contacts the latch 207, the sliding rod 108 will be blocked by the latch 207. When the inner threaded rod 107 continues to move outward, it will slide along the connecting column 109, and the column spring 110 will be compressed. At this time, the inner threaded rod 107 drives the active rotating rod 111 to rotate, and the passive rotating rod 112 rotates around the sliding rod 108, thereby driving the clamping block 113 and the clamping sleeve 114 to move outward. At this time, the two clamping sleeves 114 open, and the plastic pipe 4 can be placed between the two clamping sleeves 114. Subsequently, the lead screw motor 102 drives the lead screw bevel gear 104 and the lead screw 105 to rotate through the motor bevel gear 103, driving the inner threaded rod 107 to move inward toward the rotating block 302. Under the action of the rebound of the column spring 110, it drives the active rotating rod 111 and the passive rotating rod 112 to rotate, thereby driving the clamping block 113 and the clamping sleeve 114 to move inward, clamping the plastic pipe 4 through the clamping sleeve 114. Subsequently, the inner threaded rod 107 drives the sliding rod 108 to move inward toward the rotating block 302 together through the column spring 110 and the connecting column 109, thereby driving the two plastic pipes 4 to move toward the rotating block 302 together.

[0036] As Figure 9 、 Figure 10 shown, the locking device includes a rotating seat 208 fixedly installed on the outer slide rail 106. A sliding column 202 is slidably installed on the sliding seat 201 and the rotating seat 208 respectively. A slope block 204 is fixedly installed on the sliding column 202. A sliding column spring 203 is arranged between the slope block 204 and the sliding seat 201, and a sliding column spring 203 is arranged between the slope block 204 and the rotating seat 208. An outer rotating rod 205 is rotatably installed on the slope block 204. A rotating rod 206 is rotatably installed on the outer rotating rod 205. A latch 207 is fixedly installed on the rotating rod 206. The latch 207 is rotatably installed with the rotating seat 208, and the slope block 204 is slidably installed with the inner threaded rod 107.

[0037] As Figure 9 、 Figure 10 shown, a long groove is provided on the outer slide rail 106, and the latch 207 slides in the long groove of the outer slide rail 106.

[0038] When the inner threaded rod 107 moves outward, the inner threaded rod 107 pushes the slope block 204 outward. The sliding column 202 slides along the sliding seat 201 and the rotating seat 208, and the sliding column spring 203 is compressed. The slope block 204 drives the outer rotating rod 205 to rotate, thereby driving the rotating rod 206 and the latch 207 to rotate around the rotating seat 208, so that the latch 207 extends out of the outer slide rail 106 to block the sliding rod 108.

[0039] When the inner threaded rod 107 moves towards the rotating block 302, under the action of the slope surface of the slope block 204, the sliding column spring 203 rebounds continuously, driving the outer rotating rod 205 to rotate, thereby driving the rotating rod 206 and the clamping block 207 to rotate. The clamping block 207 no longer extends out of the outer slide rail 106, and the clamping block 207 will not block the movement of the inner threaded rod 107 towards the rotating block 302. The movement of the inner threaded rod 107 and the sliding rod 108 drives the end of the plastic pipe 4 to contact the heating sheet 305. At this time, the screw motor 102 stops rotating. In the initial state, the heating sheet 305 will extend out of the end of the rotating block 302, and the end of the plastic pipe 4 is heated and melted by the heating sheet 305.

[0040] As Figures 11 - 13 shown, the hot melting device includes a rotating block 302 rotatably installed on the vertical frame 301. A fixed gear 312 is fixedly installed on the vertical frame 301. A rotating motor 303 is fixedly installed on the rotating block 302. A motor gear 304 is fixedly installed on the motor shaft of the rotating motor 303. An intermediate gear 313 is rotatably installed in the rotating block 302. The intermediate gear 313 meshes with the motor gear 304, and the intermediate gear 313 meshes with the fixed gear 312.

[0041] As Figures 11 - 13 shown, the rotating block 302 is provided with a retracting mechanism. The retracting mechanism includes two turntables 308 rotatably installed in the rotating block 302. A central gear 307 is fixedly installed on the turntable 308. The central gear 307 meshes with the intermediate gear 313. Three active rotating seats 309 are rotatably installed on the turntable 308. An inclined rotating rod 310 is rotatably installed on the active rotating seat 309. Two sliding discs 306 are slidably installed in the rotating block 302. A heating sheet 305 is fixedly installed on the sliding disc 306. Three passive rotating seats 311 are rotatably installed on the sliding disc 306. The passive rotating seat 311 is rotatably installed with the inclined rotating rod 310.

[0042] After the heating sheet 305 heats and melts the end of the plastic pipe 4, the rotating motor 303 rotates to drive the motor gear 304 to rotate, thereby driving the intermediate gear 313 to rotate. Under the action of the fixed gear 312, the rotating block 302 is driven to rotate around the vertical frame 301. The rotation of the intermediate gear 313 will also drive the central gear 307 and the turntable 308 to rotate simultaneously, thereby driving the active rotating seat 309 to rotate, and then driving 320 to rotate. The sliding disc 306 and the heating sheet 305 are driven by the passive rotating seat 311 to slide inward along the rotating block 302, so that the heating sheet 305 retracts inward while rotating with the rotating block 302, preventing the heating sheet 305 from damaging the melted end of the plastic pipe 4 during the rotation following the rotating block 302. When the rotating block 302 rotates 90 degrees, the lead screw motor 102 continues to rotate to drive the internal threaded rod 107 and the sliding rod 108 to move inward, so that the two plastic pipes 4 with melted ends are butted and connected.

[0043] The working principle of a hot melt connection device for butt - jointing plastic pipes disclosed in the present invention is as follows: In the initial state, the column spring 110 is in an unloaded state. The screw motor 102 rotates to drive the motor bevel gear 103 to rotate, thereby driving the screw bevel gear 104 and the screw rod 105 to rotate, driving the two inner threaded rods 107 to move outward simultaneously. When the inner threaded rod 107 moves outward, the inner threaded rod 107 pushes the slope block 204 outward. The sliding column 202 slides along the sliding seat 201 and the rotating seat 208, and the sliding column spring 203 is compressed. The slope block 204 drives the outer rotating rod 205 to rotate, thereby driving the rotating rod 206 and the clamping block 207 to rotate around the rotating seat 208, so that the clamping block 207 extends out of the outer slide rail 106 to block the sliding rod 108. The inner threaded rod 107 drives the sliding rod 108 to slide outward along the outer slide rail 106 together through the connecting column 109 and the column spring 110. When the sliding rod 108 contacts the clamping block 207, the sliding rod 108 will be blocked by the clamping block 207. When the inner threaded rod 107 continues to move outward, it will slide along the connecting column 109, and the column spring 110 is compressed. At this time, the inner threaded rod 107 drives the active rotating rod 111 to rotate, and the passive rotating rod 112 rotates around the sliding rod 108, thereby driving the clamping block 113 and the clamping sleeve 114 to move outward. At this time, the two clamping sleeves 114 open, and at this time, the plastic pipe 4 can be placed between the two clamping sleeves 114. Subsequently, the screw motor 102 drives the screw bevel gear 104 and the screw rod 105 to rotate through the motor bevel gear 103, driving the inner threaded rod 107 to move inward towards the rotating block 302. Under the action of the rebound of the column spring 110, it drives the active rotating rod 111 and the passive rotating rod 112 to rotate, thereby driving the clamping block 113 and the clamping sleeve 114 to move inward, clamping the plastic pipe 4 through the clamping sleeve 114. Subsequently, the inner threaded rod 107 drives the sliding rod 108 to move inward towards the rotating block 302 together through the column spring 110 and the connecting column 109, thereby driving the two plastic pipes 4 to move towards the rotating block 302 together. When the inner threaded rod 107 moves towards the rotating block 302, under the action of the slope of the slope block 204, the sliding column spring 203 rebounds continuously, driving the outer rotating rod 205 to rotate, thereby driving the rotating rod 206 and the clamping block 207 to rotate. The clamping block 207 no longer extends out of the outer slide rail 106, and the clamping block 207 will not block the inward movement of the inner threaded rod 107 towards the rotating block 302. The movement of the inner threaded rod 107 and the sliding rod 108 drives the end of the plastic pipe 4 to contact the heating sheet 305. At this time, the screw motor 102 stops rotating. In the initial state, the heating sheet 305 will extend out of the end of the rotating block 302, and the end of the plastic pipe 4 is heated and melted by the heating sheet 305.After the heating sheet 305 heats and melts the end of the plastic pipe 4, the rotation motor 303 rotates to drive the motor gear 304 to rotate, thereby driving the intermediate gear 313 to rotate. Thus, under the action of the fixed gear 312, the rotating block 302 is driven to rotate around the vertical frame 301. The rotation of the intermediate gear 313 also drives the central gear 307 and the turntable 308 to rotate simultaneously, thereby driving the active rotating seat 309 to rotate, and then driving 320 to rotate. The sliding plate 306 and the heating sheet 305 are driven by the passive rotating seat 311 to slide inward along the rotating block 302, so that the heating sheet 305 retracts inward while rotating with the rotating block 302, preventing the heating sheet 305 from damaging the melted end of the plastic pipe 4 during the rotation process following the rotating block 302. When the rotating block 302 rotates 90 degrees, the lead screw motor 102 continues to rotate to drive the internal threaded rod 107 and the sliding rod 108 to move inward, thereby enabling the two plastic pipes 4 with melted ends to be butt-joined.

[0044] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope of the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A plastic pipe butt hot-melt connection device, comprising a main frame device, characterized in that: The main frame device comprises a base (101), an outer slide rail (106) is fixedly mounted on the base (101), the main frame device is used to clamp the plastic pipe and drive the plastic pipe to dock, the main frame device is provided with a locking device and a hot-melt device, the locking device comprises a slide seat (201), the slide seat (201) is fixedly mounted on the outer slide rail (106), the locking device is used to cooperate with the main frame device to clamp the plastic pipe, the hot-melt device comprises a stand (301), the stand (301) is fixedly mounted on the base (101), and the hot-melt device is used to hot-melt the end of the plastic pipe; The main frame device comprises a screw motor (102) fixedly mounted on a base (101), a motor bevel gear (103) fixedly mounted on a motor shaft of the screw motor (102), two screws (105) rotatably mounted on the base (101), a screw bevel gear (104) fixedly mounted on the screws (105), and the screw bevel gear (104) meshes with the motor bevel gear (103); Two clamping mechanisms are arranged on the outer slide rail (106), and the clamping mechanism comprises an internal threaded rod (107) and a sliding rod (108) which are slidably mounted on the outer slide rail (106); the internal threaded rod (107) and the screw rod (105) form a threaded transmission, the sliding rod (108) and the screw rod (105) do not contact each other, a connecting column (109) is fixedly mounted on the sliding rod (108), the internal threaded rod (107) and the connecting column (109) are slidably mounted, a column spring (110) is arranged between the connecting column (109) and the internal threaded rod (107), two active rotating rods (111) are rotatably mounted on the internal threaded rod (107), two passive rotating rods (112) are rotatably mounted on the sliding rod (108), a clamping block (113) is rotatably mounted on the active rotating rod (111), and the clamping block (113) and the passive rotating rod (112) are rotatably mounted; A clamping sleeve (114) is fixedly mounted on the clamping block (113); the clamping sleeve (114) is made of rubber and is used to clamp the plastic pipe (4); The locking device comprises a rotating seat (208) fixedly mounted on the outer slide rail (106); a slide column (202) is slidably mounted on the slide seat (201) and the rotating seat (208), respectively; a slope block (204) is fixedly mounted on the slide column (202); a slide column spring (203) is arranged between the slope block (204) and the slide seat (201); a slide column spring (203) is arranged between the slope block (204) and the rotating seat (208); an outer rotating rod (205) is rotatably mounted on the slope block (204); a rotating rod (206) is rotatably mounted on the outer rotating rod (205); a clamping block (207) is fixedly mounted on the rotating rod (206); the clamping block (207) is rotatably mounted on the rotating seat (208); and the slope block (204) is slidably mounted on the internal threaded rod (107).

2. A plastic pipe butt hot melt connection device according to claim 1, characterized in that: The outer slide rail (106) is provided with a long groove, and the clamping block (207) slides in the long groove of the outer slide rail (106).

3. A plastic pipe butt hot-melt connection device according to claim 1, characterized in that: The hot melt device comprises a rotating block (302) rotatably mounted on a stand (301), a fixed gear (312) fixedly mounted on the stand (301), a rotating motor (303) fixedly mounted on the rotating block (302), a motor gear (304) fixedly mounted on the motor shaft of the rotating motor (303), an intermediate gear (313) rotatably mounted in the rotating block (302), the intermediate gear (313) meshing with the motor gear (304), and the intermediate gear (313) meshing with the fixed gear (312).

4. A plastic pipe butt hot-melt connection device according to claim 3, characterized in that: The rotating block (302) is provided with an inward-retracting mechanism, which comprises two rotating disks (308) rotatably mounted in the rotating block (302), a central gear (307) fixedly mounted on the rotating disk (308), the central gear (307) meshing with an intermediate gear (313), three active rotating seats (309) rotatably mounted on the rotating disk (308), an oblique rotating rod (310) rotatably mounted on the active rotating seat (309), two sliding disks (306) slidably mounted in the rotating block (302), a heating plate (305) fixedly mounted on the sliding disk (306), three passive rotating seats (311) rotatably mounted on the sliding disk (306), and the passive rotating seats (311) are rotatably mounted with the oblique rotating rod (310).

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