CN115431531A

CN115431531A - Hot melting combination device for plastic pipes

Info

Publication number: CN115431531A
Application number: CN202211077862.5A
Authority: CN
Inventors: 张东财
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2022-12-06

Abstract

The invention discloses a hot melting combination device for plastic pipes, and relates to the technical field of plastic pipe processing. The pipe polishing machine comprises a base, wherein the front end and the rear end of the left side and the right side of the base are both connected with a square rod in a sliding mode, a motor is started through a rotating mechanism, a pinion is driven to rotate through a rotating rod I, two large gears start to rotate under the influence of the pinion, when a fixed block II rotates to a certain position, an arc-shaped block can jack up the arc-shaped rod, a sliding plate can extrude a spring III when the arc-shaped rod moves, and at the moment, a polishing block is pushed out by the arc-shaped rod to polish the surface of a pipe, so that the aim of directly polishing the hot-melted pipe is fulfilled, the condition that a worker needs to perform secondary work is avoided, the work efficiency is greatly increased, and the fixed rod limits the arc-shaped block to be fixed inside the two large gears, the two large gears are limited by the arc-shaped block, and the outer surface of the arc-shaped block rotates.

Description

Hot melting combination device for plastic pipes

Technical Field

The invention belongs to the technical field of plastic pipe processing, and particularly relates to a hot melting combination device for a plastic pipe.

Background

The plastic pipe is taken as an important component of chemical building materials, is widely accepted by users due to the advantages of excellent performance, sanitation, environmental protection, low consumption and the like, and mainly comprises a UPVC drain pipe, a UPVC water supply pipe, an aluminum-plastic composite pipe, a Polyethylene (PE) water supply pipe and a polypropylene PPR hot water pipe;

at present hot melt composite set at work, after two plastics tubular product contacts fuse, the surface often has partly plastics to be protruding, leads to the plastic conduit to seem very pleasing to the eye and can influence the use of plastics tubular product to a certain extent, so the staff need carry out secondary work to it, grinds protruding plastics, and is very inconvenient, for this reason we have proposed the hot melt composite set of plastics tubular product.

Disclosure of Invention

The invention aims to provide a hot-melting combination device for plastic pipes, which solves the existing problems through a rotating mechanism.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a hot-melting combination device for plastic pipes, which comprises a base, wherein the front and rear ends of the left and right sides of the base are respectively connected with a square rod in a sliding manner, the ends, far away from each other, of the four square rods are respectively fixedly connected with a right-angle block, the sides, close to each other, of the upper ends of the two right-angle blocks are respectively provided with a clamping mechanism, a rotating mechanism is arranged at the central shaft of the top of the base, and the left and right sides of the top of the base are respectively provided with a heating device;

the inner part of the rotating mechanism comprises a first cylindrical block, a protection box, a pinion, a second cylindrical block, big gears, arc-shaped blocks, fixing rods and polishing mechanisms, wherein the protection box is arranged on the front side of the first cylindrical block, the pinion is arranged in the first cylindrical block, the second cylindrical block is fixedly connected to the left side of the first cylindrical block, the big gears are arranged at the front end and the rear end of the inner part of the second cylindrical block, the arc-shaped blocks are arranged on the inner surfaces of the two big gears, the number of the arc-shaped blocks is twelve, the fixing rods are fixedly connected to one ends, far away from each other, of the twelve arc-shaped blocks, and the polishing mechanisms are arranged on the inner surfaces of the two big gears;

one ends, far away from the twelve arc-shaped blocks, of the twelve fixing rods are fixedly connected with the inner surfaces of the two cylindrical blocks, and the two large gears are meshed with the small gears.

Further, the inside fixed mounting of guard box has the motor, the pinion passes through dwang one and is connected, two with the motor output rotation the gear wheel all is connected with the motor rotation through the pinion.

Furthermore, the twelve arc-shaped blocks are connected with the inner walls of the two large gears in a sliding manner, and the front ends and the rear ends of the twelve fixed rods are contacted with one sides of the two large gears which are close to each other;

and hydraulic cylinders are fixedly arranged in the inner parts of the two sides, close to each other, of the upper ends of the right-angle blocks.

Further, the clamping mechanism comprises a first fixing block, a T-shaped rod, a top block, a first circular sleeve block, a second circular sleeve block, an arc-shaped plate and an extrusion block, the first fixing block is fixedly connected to the front side of the hydraulic cylinder, first sliding grooves are formed in the first fixing block, the number of the first sliding grooves is six, the T-shaped rod is slidably connected to the first six sliding grooves, the first circular sleeve block is arranged on the outer surface of the first fixing block, the first circular sleeve block is fixedly connected to the right side of the hydraulic cylinder, openings are formed in the inner surface of the first circular sleeve block, the number of the openings is three, the top block is slidably connected to the three openings, the bottoms of the three top blocks are fixedly connected to the tops of the six T-shaped rods, the second circular sleeve block is arranged on the outer surface of the first circular sleeve block, the second circular sleeve block is fixedly connected to the right side of the hydraulic cylinder, arc-shaped sliding grooves are formed in the second circular sleeve block, the three arc-shaped sliding grooves are all slidably connected to the three arc-shaped sliding grooves, and the extrusion block is fixedly connected to the upper end and the lower end of the inner surface of the three arc-shaped plate;

the outer surfaces of the three arc-shaped plates are fixedly connected with a first spring, the number of the first springs is nine, and the first spring is far away from one end of each of the three arc-shaped plates and fixedly connected with the inner walls of the three arc-shaped grooves.

Furthermore, an arc-shaped fixture block is fixedly connected to the top of the ejecting block, a groove is formed in the middle shaft of the arc-shaped fixture block, and rotating blocks are arranged on the left side and the right side inside the groove;

two the turning blocks all are connected through bull stick and the inside rotation of recess, two the turning block is close to the equal fixedly connected with connecting block of one end each other.

Furthermore, six equal fixed mounting in one end that the extrusion piece is close to each other has the dull polish board, six equal fixedly connected with spring two in spout inner wall top, six the spring cup joints at six T shape pole surfaces, and accessible elasticity pushes it back to the original position when T shape pole atress.

Furthermore, the polishing mechanism comprises a second fixed block, a sliding plate, arc rods, a fixed plate, elastic plates, support plates, polishing blocks and a heat dissipation mechanism, the sliding plate is slidably connected inside the second fixed block, the arc rods are arranged inside the sliding plate, one ends of the arc rods, far away from the sliding plate, penetrate through the second fixed block and extend to the outside, the fixed plate is fixedly connected to the bottoms of the arc rods, the elastic plates are fixedly connected to the bottoms of the fixed plate, the number of the elastic plates is four, the support plates are arranged on the left side and the right side of the bottom of the fixed plate, the polishing blocks are embedded at the bottoms of the two support plates, and the heat dissipation mechanism is arranged at a central shaft at the bottom of the fixed plate;

the tops of the two supporting plates are fixedly connected with the bottoms of the four elastic plates respectively, a third spring is fixedly mounted at the bottom of the sliding plate, and the bottom of the third spring is fixedly connected with the bottom of the inner wall of the second fixed block.

Further, heat dissipation mechanism includes square piece, circular connecting block, fan board and air inlet, the inside circular recess that is provided with of square piece, circular connecting block sets up inside the circular recess, fan board annular fixed connection is at circular connecting block surface, the air inlet sets up in square piece left side, and the width and the circular recess inner wall width of fan board are the same to can make the built-in wind to inside can drive the fan board and rotate.

Further, the circular connecting block is rotatably connected with the inside of the circular groove through a rotating rod II, and the right side of the air inlet is connected with the inner wall of the circular groove.

The invention has the following beneficial effects:

according to the invention, through the rotating mechanism, the motor is started, the pinion is driven to rotate through the rotating rod I, the two big gears start to rotate under the influence of the pinion, when the fixed block II rotates to a certain position, the arc-shaped block can jack the arc-shaped rod, the sliding plate can extrude the spring III when the arc-shaped rod moves, and the polishing block is pushed out by the arc-shaped rod so as to polish the surface of a pipe, so that the purpose of directly polishing the hot-melted pipe is achieved, the condition that a worker needs to perform secondary work is avoided, the working efficiency is greatly increased, and the fixed rod limits and fixes the arc-shaped block in the two big gears, so that the two big gears are limited by the arc-shaped block and rotate on the outer surface of the arc-shaped block.

According to the invention, through the heat dissipation mechanism, the square blocks rotate along with the fixing plate, wind enters the arc-shaped groove from the air inlet during rotation, the fan plate is pushed by wind to rotate, the temperature of the pipe can be quickly reduced by blowing the surface of the pipe, the condition that the polishing effect of the pipe is poor due to residual heat is avoided, and the fixing plate is arc-shaped, so that the wind can better flow into the air inlet, and the heat dissipation is increased to a great extent.

According to the invention, one end of a pipe needing to be subjected to hot melting is inserted into the clamping mechanism through the clamping mechanism, because the distance between the extrusion block and the rotating block is smaller than the wall thickness of the pipe, the rotating block is pressed to apply pressure on the T-shaped rod through the ejector block, the T-shaped rod stretches the spring and moves downward for a part of distance, then the rotating block applies pressure on the inside of the pipe through the elasticity of the second spring, the extrusion block is also pressed to move outward through the arc plate, the arc plate compresses the spring to move outward, the outer surface of the pipe is fixed through the elasticity of the first spring, meanwhile, the inner surface and the outer surface of the pipe are extruded and fixed, the pipe is extruded through two ends simultaneously, the fixing effect is increased to the maximum extent, and when the pipe is drawn out, the extrusion block and the rotating block can return to the original positions under the influence of the second spring and the third spring, so that the pipe within a certain diameter range can be clamped, and the practical effect is increased.

According to the pipe polishing device, the rotating block can rotate by contacting the surface of the rotating block with the inner wall of the pipe when the pipe extends in, but when the pipe is polished, the rotating block can clamp the pipe by the inclined angle of the rotating block, so that the pipe is prevented from being driven to rotate in the same position by contacting with the polishing block, the roughness of the contact surface of the pipe and the outer wall of the pipe can be increased by the polishing plate, and the phenomenon that the pipe rotates is further avoided.

Of course, it is not necessary for any product to practice the invention to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the rotating mechanism of the present invention;

FIG. 3 is an enlarged view of a portion B of FIG. 2 according to the present invention;

FIG. 4 is a schematic diagram of the internal structure of the heat dissipation mechanism of the present invention;

FIG. 5 is a schematic view of the internal structure of the clamping mechanism of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5;

fig. 7 is a schematic view of the overall structure of the bull gear of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a base; 2. a square rod; 3. a right-angle block; 4. a clamping mechanism; 41. a first fixed block; 42. a T-shaped rod; 43. a top block; 431. an arc-shaped fixture block; 432. rotating the block; 433. connecting blocks; 44. a first circular sleeve block; 45. a second round sleeve block; 46. an arc-shaped plate; 47. extruding the block; 5. a rotating mechanism; 51. a first cylindrical block; 52. a protection box; 53. a pinion gear; 54. a second cylindrical block; 55. a bull gear; 56. an arc-shaped block; 57. fixing the rod; 58. a polishing mechanism; 581. a second fixed block; 582. a sliding plate; 583. an arc rod; 584. a fixing plate; 585. an elastic plate; 586. a support plate; 857. grinding blocks; 588. a heat dissipation mechanism; 5881. a square block; 5882. a circular connecting block; 5883. a fan plate; 5884. an air inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

Referring to fig. 1-7, the invention relates to a hot-melting combination device for plastic pipes, which comprises a base 1, wherein the front and rear ends of the left side and the right side of the base 1 are both slidably connected with square rods 2, the ends of the four square rods 2, which are far away from each other, are both fixedly connected with right-angle blocks 3, the sides, which are close to each other, of the upper ends of the two right-angle blocks 3 are both provided with a clamping mechanism 4, a rotating mechanism 5 is arranged at the center shaft of the top of the base 1, and the left side and the right side of the top of the base 1 are both provided with heating devices 6;

the rotating mechanism 5 comprises a first cylindrical block 51, a protection box 52, a pinion 53, a second cylindrical block 54, a gearwheel 55, an arc-shaped block 56, a fixing rod 57 and a polishing mechanism 58, the protection box 52 is arranged on the front side of the first cylindrical block 51, the pinion 53 is arranged inside the first cylindrical block 51, the second cylindrical block 54 is fixedly connected to the left side of the first cylindrical block 51, the gearwheel 55 is arranged at the front end and the rear end inside the second cylindrical block 54, the arc-shaped blocks 56 are arranged on the inner surfaces of the two gearwheel 55, the number of the arc-shaped blocks 56 is twelve, the fixing rod 57 is fixedly connected to the end, far away from the twelve arc-shaped blocks 56, the polishing mechanism 58 is arranged on the inner surfaces of the two gearwheel 55, the pinion 53 is driven to rotate by the first rotating rod 5 by starting a motor, the two gearwheel 55 are influenced by the pinion 53, the two gearwheel 55 start to rotate, when the second fixing block 581 rotates to a certain position, the arc-shaped block 56 jacks up the arc-shaped rod 583, the sliding plate 582 extrudes a third spring when the arc-shaped rod 583 moves, the polishing block 857 is pushed out by the arc-shaped rod 583 to polish the surface to polish the pipe surface, the situation that the working efficiency of the two arc-shaped blocks is greatly limited by the working rod 56, the working rod 56 is increased, and the working efficiency of the two arc-shaped blocks is greatly increased, and the pipe is increased;

one end of each of the twelve fixing rods 57 far away from the twelve arc-shaped blocks 56 is fixedly connected with the inner surface of the second cylindrical block 54, and the two large gears 55 are meshed with the small gears 53.

The motor is fixedly installed in the protection box 52, the pinion 53 is rotatably connected with the output end of the motor through a rotating rod I, and the two large gears 55 are rotatably connected with the motor through the pinion 53.

The twelve arc-shaped blocks 56 are in sliding connection with the inner walls of the two large gears 55, and the front ends and the rear ends of the twelve fixed rods 57 are in contact with one sides of the two large gears 55 close to each other;

the hydraulic cylinders are fixedly arranged inside the side, close to each other, of the upper ends of the two right-angle blocks 3.

The clamping mechanism 4 comprises a first fixed block 41, a T-shaped rod 42, a top block 43, a first circular sleeve block 44, a second circular sleeve block 45, arc-shaped plates 46 and an extrusion block 47, the first fixed block 41 is fixedly connected to the front of the hydraulic cylinder, first sliding grooves are formed in the first fixed block 41, the first sliding grooves are six in number, the T-shaped rods 42 are all slidably connected to the first six sliding grooves, the first circular sleeve block 44 is arranged on the outer surface of the first fixed block 41, openings are formed in the inner surface of the first circular sleeve block 44, the three openings are three, the top block 43 is all slidably connected to the three openings, the bottoms of the three top blocks 43 are all fixedly connected with the tops of the six T-shaped rods 42, the second circular sleeve block 45 is arranged on the outer surface of the first circular sleeve block 44, arc-shaped sliding grooves are formed in the second circular sleeve block 45, the three arc-shaped sliding grooves are formed in number, the arc-shaped plates 46 are all slidably connected to the three arc-shaped sliding grooves, the extrusion block 47 is all fixedly connected to the upper end and the lower end of the inner surfaces of the three arc-shaped plates 46, one end of a pipe needing hot melting is inserted into the clamping mechanism 4 through the clamping mechanism 4, the rotating block 432 is stressed by pressure, the T-shaped rod 42 is stressed by the ejector block 43, the T-shaped rod 42 stretches the spring and moves downwards for a part of distance, then the rotating block 432 is stressed by the elasticity of the spring II to apply pressure to the inside of the pipe, as the distance between the extrusion block 433 and the rotating block 433 is smaller than the wall thickness of the pipe, the extrusion block 47 is stressed by pressure and moves outwards through the arc-shaped plate 46, the arc-shaped plate 46 compresses the spring to move outwards and fixes the outer surface of the pipe through the elasticity of the spring I, meanwhile, the inner surface and the outer surface of the pipe are extruded and fixed, the pipe is extruded through two ends, the original position fixing effect is greatly increased, and when the pipe is drawn out, the extrusion block 47 and the rotating block 432 can return to the original position under the influence of the spring II and the spring III, the pipe in a certain diameter range can be clamped, and the practical effect is improved;

the outer surfaces of the three arc-shaped plates 46 are fixedly connected with a first spring, the number of the first springs is nine, and one ends, far away from the three arc-shaped plates 46, of the nine first springs are fixedly connected with the inner walls of the three arc-shaped grooves.

An arc-shaped fixture block 431 is fixedly connected to the top of the top block 43, a groove is formed in the middle shaft of the arc-shaped fixture block 431, and rotating blocks 432 are arranged on the left side and the right side inside the groove;

two turning blocks 432 are all connected through bull stick and the inside rotation of recess, through turning block 432, thereby turning block 432 can rotate through surface and the contact of tubular product inner wall when tubular product stretches into, nevertheless when tubular product is polished, turning block 432 can block it through the angle of its slope and avoided tubular product can be because of being driven with the contact of polishing block 857 and carry out the circumstances emergence of apposition pivoted, two turning blocks 432 are close to the equal fixedly connected with connecting block 433 of one end each other.

The equal fixed mounting in one end that six dummy blocks 47 are close to each other has dull polish board, crosses dull polish board, multiplicable and the roughness of tubular product outer wall contact surface, has further avoided tubular product can carry out the equal fixedly connected with spring two in the pivoted phenomenon emergence six spout one inner wall tops, and six spring cup joints are at six T shape pole 42 surfaces.

The polishing mechanism 58 comprises a second fixed block 581, a sliding plate 582, arc rods 583, a fixed plate 584, an elastic plate 585, a supporting plate 586, a polishing block 857 and a heat dissipation mechanism 588, the sliding plate 582 is slidably connected inside the second fixed block 581, the arc rods 583 are arranged inside the sliding plate 582, one ends, far away from the sliding plate 582, of the arc rods 583 penetrate through the second fixed block 581 and extend to the outside, the fixed plate 584 is fixedly connected to the bottom of the arc rods 583, the elastic plates 585 are fixedly connected to the bottom of the fixed plate 584, the number of the elastic plates 585 is four, the supporting plates 586 are arranged on the left side and the right side of the bottom of the fixed plate 584, the polishing block 857 is embedded at the bottoms of the two supporting plates 586, and the heat dissipation mechanism 588 is arranged at the middle shaft of the bottom of the fixed plate 584;

the tops of the two supporting plates 586 are respectively fixedly connected with the bottoms of the four elastic plates 585, the bottom of the sliding plate 582 is fixedly provided with a third spring, and the bottom of the third spring is fixedly connected with the bottom of the inner wall of the second fixed block 581.

The heat dissipation mechanism 588 comprises a square block 5881, a circular connecting block 5882, a fan plate 5883 and an air inlet 5884, wherein a circular groove is formed in the square block 5881, the circular connecting block 5882 is arranged in the circular groove, the fan plate 5883 is fixedly connected to the outer surface of the circular connecting block 5882 in an annular mode, the air inlet 5884 is formed in the left side of the square block 5881, the heat dissipation mechanism 588 is arranged, the square block 5881 rotates along with a fixing plate 584, air enters the circular groove from the air inlet 5884 during rotation, the fan plate 5883 is pushed by wind power to rotate, the temperature of a pipe can be rapidly reduced through fan air on the surface of the pipe, the problem that the pipe is poor in polishing effect due to residual heat is avoided, and the fixing plate 584 is arc-shaped, so that air can better flow into the air inlet 5884, and heat dissipation is increased to the greatest extent.

The circular connecting block 5882 is rotatably connected with the inside of the circular groove through a second rotating rod, and the right side of the air inlet 5884 is connected with the inner wall of the circular groove.

One specific application of this embodiment is: the right-angle block 3 is stretched to a proper position to the outside through the square rod 2, then one end of a pipe needing to be subjected to hot melting is inserted into the clamping mechanism 4, because the distance between the extrusion block 433 and the rotating block 433 is smaller than the wall thickness of the pipe, the rotating block 432 is stressed to apply pressure to the T-shaped rod 42 through the ejector block 43, the T-shaped rod 42 stretches the spring and moves a part of distance downwards, then the rotating block 432 applies pressure to the inside of the pipe through the elasticity of the second spring, the extrusion block 47 is also stressed to move outwards through the arc-shaped plate 46, the arc-shaped plate 46 compresses the spring to move outwards, the outer surface of the pipe is fixed through the elasticity of the first spring, meanwhile, the inner surface and the outer surface of the pipe are extruded and fixed, the fixing effect is greatly increased, after the two pipes are fixed, the clamping mechanism 4 is pushed to move towards the middle shaft through the hydraulic cylinder, when the pipe is pushed to a proper position, the heating device 6 is started, the pipe is heated to be softened and then pushed into the rotating mechanism 5, the motor is started, the pinion 53 is driven to rotate through the rotating rod I, the two large gears 55 start to rotate under the influence of the pinion 53, when the fixed block II 581 rotates to a certain position, the arc-shaped blocks 56 jack the arc rod 583, the sliding plate 582 can extrude the spring III when the arc rod 583 moves, the polishing block 857 is pushed out by the arc rod 583 to polish the surface of the pipe, the square blocks 5881 rotate along with the fixed plate 584, wind enters the arc groove from the air inlet 5884 during rotation, the fan plate 5883 is pushed by wind to rotate, and the temperature of the pipe can be rapidly reduced through the fan on the surface of the pipe.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a hot melt composite set of plastics tubular product, includes base (1), its characterized in that: the front end and the rear end of the left side and the right side of the base (1) are both connected with square rods (2) in a sliding manner, one ends, far away from each other, of the four square rods (2) are both fixedly connected with right-angle blocks (3), one sides, close to each other, of the upper ends of the two right-angle blocks (3) are both provided with clamping mechanisms (4), a rotating mechanism (5) is arranged at a center shaft at the top of the base (1), and the left side and the right side of the top of the base (1) are both provided with heating devices (6);

the rotating mechanism (5) comprises a first cylindrical block (51), a protection box (52), a pinion (53), a second cylindrical block (54), a large gear (55), an arc-shaped block (56), a fixing rod (57) and a polishing mechanism (58) inside, the protection box (52) is arranged on the front side of the first cylindrical block (51), the pinion (53) is arranged inside the first cylindrical block (51), the second cylindrical block (54) is fixedly connected to the left side of the first cylindrical block (51), the large gears (55) are arranged at the front end and the rear end inside the second cylindrical block (54), the arc-shaped blocks (56) are arranged on the inner surfaces of the two large gears (55), the number of the arc-shaped blocks (56) is twelve, the fixing rods (57) are fixedly connected to the ends, far away from the twelve arc-shaped blocks (56), and the polishing mechanism (58) is arranged on the inner surfaces of the two large gears (55);

one ends of the twelve fixing rods (57) far away from the twelve arc-shaped blocks (56) are fixedly connected with the inner surface of the second cylindrical block (54), and the two large gears (55) are meshed with the small gear (53).

2. The hot-melting combination device for the plastic pipes as claimed in claim 1, wherein a motor is fixedly mounted inside the protection box (52), the pinion (53) is rotatably connected with the output end of the motor through a rotating rod I, and the two bull gears (55) are rotatably connected with the motor through the pinion (53).

3. The hot-melting combination device for the plastic pipes as claimed in claim 1, wherein twelve arc-shaped blocks (56) are slidably connected with the inner walls of the two large gears (55), and the front and rear ends of twelve fixing rods (57) are in contact with the side, close to each other, of the two large gears (55);

two the equal fixed mounting in one side that right angle piece (3) upper end is close to each other has the pneumatic cylinder.

4. The hot-melting combination device for the plastic pipes, as claimed in claim 1, wherein the clamping mechanism (4) comprises a first fixing block (41), a T-shaped rod (42), a top block (43), a first circular sleeve block (44), a second circular sleeve block (45), an arc-shaped plate (46) and an extrusion block (47) inside, the first fixing block (41) is fixedly connected to the front surface of the hydraulic cylinder, the first fixing block (41) is provided with six first sliding chutes inside, the T-shaped rod (42) is slidably connected to the six first sliding chutes, the first circular sleeve block (44) is arranged on the outer surface of the first fixing block (41), the first circular sleeve block (44) is provided with three openings on the inner surface, the top blocks (43) are slidably connected to the inside of the three openings, the bottoms of the three top blocks (43) are fixedly connected to the tops of the six T-shaped rods (42), the second circular sleeve block (45) is arranged on the outer surface of the first circular sleeve block (44), the second circular sleeve block (45) is provided with an arc-shaped groove, the arc-shaped rod (43) is slidably connected to the inner surface of the three sliding chutes, the three sliding chutes (46) are fixedly connected to the lower ends of the extrusion block (47);

the outer surfaces of the three arc-shaped plates (46) are fixedly connected with a first spring, the number of the first springs is nine, and one ends, far away from the three arc-shaped plates (46), of the nine first springs are fixedly connected with the inner walls of the three arc-shaped grooves.

5. The hot melting combination device for the plastic pipes as claimed in claim 4, wherein an arc-shaped fixture block (431) is fixedly connected to the top of the top block (43), a groove is formed in the middle shaft of the arc-shaped fixture block (431), and rotating blocks (432) are arranged on the left side and the right side inside the groove;

two turning block (432) all are connected through bull stick and the inside rotation of recess, two turning block (432) are close to the equal fixedly connected with connecting block (433) of one end each other.

6. The hot-melting combination device for the plastic pipes as claimed in claim 4, wherein the six extrusion blocks (47) are fixedly provided with a frosting plate at one end close to each other, the tops of the inner walls of the six sliding chutes are fixedly connected with springs II, and the six springs II are sleeved on the outer surfaces of the six T-shaped rods (42).

7. The hot-melt combination device for the plastic pipes, according to claim 1, is characterized in that the polishing mechanism (58) comprises a second fixed block (581), a sliding plate (582), a circular arc rod (583), a fixed plate (584), four elastic plates (585), a support plate (586), a polishing block (857) and a heat dissipation mechanism (588), the sliding plate (582) is slidably connected inside the second fixed block (581), the circular arc rod (583) is arranged inside the sliding plate (582), one end of the circular arc rod (583), which is far away from the sliding plate (582), penetrates through the second fixed block (581) and extends to the outside, the fixed plate (584) is fixedly connected to the bottom of the circular arc rod (583), the elastic plates (585) are fixedly connected to the bottom of the fixed plate (584), the number of the elastic plates (585) is four, the support plates (586) are arranged on the left side and the right side of the bottom of the fixed plate (584), the polishing block (857) is embedded at the bottoms of the two support plates (586), and the heat dissipation mechanism (588) is arranged at the bottom of the fixed plate (584);

two the top of backup pad (586) is equallyd divide respectively with four elastic plate (585) bottom fixed connection, sliding plate (582) bottom fixed mounting has spring three, three bottoms of spring and fixed block two (581) inner wall bottom fixed connection.

8. The thermal fusion combining apparatus for plastic pipe as claimed in claim 7, wherein the heat dissipating mechanism (588) comprises a square block (5881), a circular connecting block (5882), a fan plate (5883) and an air inlet (5884), the square block (5881) is provided with a circular groove therein, the circular connecting block (5882) is disposed in the circular groove, the fan plate (5883) is fixedly connected to the outer surface of the circular connecting block (5882) in an annular shape, and the air inlet (5884) is disposed at the left side of the square block (5881).

9. The thermal melting combination device for plastic pipes as claimed in claim 8, wherein the circular connecting block (5882) is rotatably connected with the inside of the circular groove by a second rotating rod, and the right side of the air inlet (5884) is connected with the inner wall of the circular groove.