CN117507372A

CN117507372A - Hot melting butt joint device for plastic pipe

Info

Publication number: CN117507372A
Application number: CN202311777571.1A
Authority: CN
Inventors: 文军海; 刘敏芝
Original assignee: Hunan Jinhai Plastic Pipe Industry Co ltd
Current assignee: Hunan Jinhai Plastic Pipe Industry Co ltd
Priority date: 2023-12-22
Filing date: 2023-12-22
Publication date: 2024-02-06

Abstract

The invention discloses a hot-melting butt joint device for plastic pipes, which comprises a frame and a hot-melting butt joint assembly arranged on the frame, wherein the hot-melting butt joint assembly comprises a slip clamp, a butt joint disc, a gauge barrel and a heating plate, the butt joint disc is fixedly assembled at the butt joint end part of the plastic pipe, the butt joint disc is provided with a slip clamping part formed at the back side of the disc, the outer edge of the disc is provided with a flange assembly seat, the center of the disc is provided with a penetrating hole matched with the plastic pipe and an extrusion molding cavity, the extrusion molding cavity is provided with a plurality of arc-shaped pressing blocks driven by a jacking mechanism, and the inner side of the arc-shaped pressing blocks is movably embedded with an elastic ring sleeve. The invention can be used for realizing the processes of feeding, positioning, butting and stable forming of plastic pipes to be butted, has simple butting process and convenient operation, and can further improve the butting precision and the butting efficiency of hot melting.

Description

Hot melting butt joint device for plastic pipe

Technical Field

The invention relates to the technical field of tool structures of pipe systems, in particular to a hot melting butt joint device for plastic pipes.

Background

In the daily production and living process of people, a large amount of pipes such as a tap water pipe, a gas pipe, a threading pipe and the like are often required to be used, the proportion of plastic pipes adopted in the pipes is high, and compared with metal pipes such as a steel pipe, a cast iron pipe and the like, the plastic pipe has the advantages of good flexibility, strong corrosion resistance, light weight, excellent shock resistance and long service life. In the process of assembling, repairing and maintaining the plastic pipe, the split pipe is often required to be subjected to butt joint operation so as to obtain enough installation length in a butt joint manner or the damaged pipe section of the pipe is replaced, so that the pipe is recovered to be normally used without replacing the whole pipe system. In addition, the butt joint technology of the plastic pipe can also be used for butt joint of plastic pipes with different pipe diameters and joints so as to realize the laying requirements of specific water and gas pipelines.

In the prior art, the butt joint of the plastic pipe mainly comprises five modes of hot melt butt joint, socket connection, sealing rubber ring connection, joint connection and adhesive connection, and the technologies of the five modes are good and bad. At present, the butt joint of plastic pipes with the same pipe diameter is mainly realized by hot melt butt joint and joint connection; the hot melting butt joint mode is to use a hot melting machine as a tool, put a heating plate between two butt joint pipes in butt joint, butt joint end faces of the pipes are abutted against the heating plate, the butt joint end faces of the pipes are heated by the heating plate, meanwhile, the pipes axially move and squeeze the heating plate to enable the joint of the pipes and the heating plate to generate a hot melting area, then the heating plate is withdrawn, external force is applied to enable the two butt joint pipes to be stably formed after being subjected to non-rotation and uniform pressure butt joint in the hot melting area, and butt joint is completed.

However, the hot melting butt joint operation in the prior art has higher requirements on experience and operation level of operators, and needs professional operators, otherwise, the problems of loose butt joint, water leakage and the like are easy to occur; meanwhile, the alignment process is very complicated, the accuracy is poor, and the pipe orifice is easy to shake during hot melting butt joint, so that the pipe orifice is not aligned, the strength defect occurs on the pipe after butt joint, the strength defect can cause unstable butt joint quality of the joint position, and the defects of air holes, cracking and poor shape occur, so that the joint quality is influenced; the joint is easy to break under the external severe environment or impact by external force or local leakage occurs at the joint under the condition of pressure in the pipe.

For the above reasons, there is a need for improvements in existing plastic tubing hot melt docking apparatus that increase their operability and reduce their operational specifications.

Disclosure of Invention

The technical problem solved by the invention is to provide the hot-melt butt joint device for the plastic pipe, which can be used for solving the defects of unstable butt joint quality, high operation technical requirements and lower butt joint efficiency of the conventional hot-melt butt joint equipment for the plastic pipe.

The technical problems solved by the invention are realized by adopting the following technical scheme:

the utility model provides a hot melt interfacing apparatus for plastic tubular product, includes the frame and sets up the hot melt interfacing assembly in the frame, the hot melt interfacing assembly includes:

slip anchor clamps: the slip clamps are arranged on two sides of the frame in pairs and are used for clamping and centering the plastic pipe; one of the two slip clamps arranged in pairs is fixed, and the other slip clamp can relatively move through the combination of the sliding seat and the sliding rail;

the butt joint disc comprises: the butt-joint disc is fixedly assembled at the butt-joint end part of the plastic pipe, the butt-joint disc comprises a disc surface, a slip clamping part is formed on the back side of the disc surface of the butt-joint disc, a flange assembly seat is arranged at the outer edge of the disc surface of the butt-joint disc, a penetrating hole matched with the plastic pipe is formed in the center of the disc of the butt-joint disc, and an extrusion molding cavity is formed at the outer edge of the penetrating hole of the butt-joint disc;

the extrusion molding cavity is a cylindrical cavity concentric with the penetrating hole, is opened at the butt joint side of the plastic pipe, and is provided with a plurality of arc-shaped pressing blocks on the outer circumference of the cavity;

the arc-shaped pressing blocks are arranged on the same circumferential surface, the propping mechanism is formed on the back side of the arc-shaped pressing blocks, and the arc-shaped pressing blocks propped by the propping mechanism can form a complete circular surface in the extrusion forming cavity; an elastic ring sleeve is movably embedded at the inner side of the arc-shaped pressing block;

and (3) a gauge barrel: the gauge barrel is movably inserted into the pipe cavity of the plastic pipe and is provided with an outer diameter matched with the inner diameter of the plastic pipe;

and (3) heating a plate: the heating plate comprises a heating ring sleeve matched with the end face of the butt joint end of the plastic pipe, and the heating ring sleeve is directly sleeved on the outer end face of the butt joint end of the plastic pipe when in heating and hot melting so as to heat and hot melt the outer end face of the plastic pipe and the outer side face of the sleeved part.

By further limiting, the slip clamp and the butt joint disc are of detachable structures, and the adaptation of plastic pipes with different pipe diameters can be realized by detaching and replacing the slip clamp and the butt joint disc.

As a further limitation, the slip clamps are assembled on the lifting support and are assembled on the frame through the lifting support, and the slip clamps on two sides of the frame level and center the plastic pipe on the Z-axis position through the lifting support.

As further limitation, the clamping positions of the two-side slip clamps and the butt joint disc on the plastic pipe are symmetrical, and the reserved interval between the clamping position of the single-side slip clamp on the plastic pipe and the clamping position of the butt joint disc on the side plastic pipe is 3-8 times of the outer diameter of the plastic pipe.

As a further limitation, the inner diameter of the extrusion molding cavity is 1.05 to 1.20 times of the outer diameter of the plastic pipe.

As a further limitation, the tightening mechanism formed on the back side of the arc-shaped pressing block is a hydraulic tightening mechanism or an electric tightening mechanism.

As a further limitation, the elastic ring sleeve is an annular spring formed by spring steel, a side branch is formed at the bending position of the annular spring, a clamping embedding hole matched with the side branch is formed at the inner side of the arc-shaped pressing block, the elastic ring sleeve is embedded at the clamping embedding hole through the side branch to complete the assembly of the elastic ring sleeve, and the side branch of the elastic ring sleeve can be retracted out of the clamping embedding hole through the retraction of the jacking mechanism.

As a further limitation, the outer cylinder surface of the gauge barrel is formed with a lubricating ceramic coating or a teflon coating which is convenient for demoulding, and the corresponding inner cylinder surface is provided with a reinforcing rib structure corresponding to the hot melting butt joint side for compression-resistant support of the gauge barrel.

As a further limitation, the heating plate comprises a plate body bracket, the heating ring sleeves are formed on the two side surfaces of the plate body bracket, and are of detachable assembly structures, and the heating ring sleeves are externally connected with a power supply through the plate body bracket; the ring section of the heating ring sleeve is of an L-shaped structure matched with the plastic pipe in size, the vertical surface of the heating ring sleeve corresponds to the outer end surface of the butt joint side of the plastic pipe, and the horizontal surface of the heating ring sleeve corresponds to the outer edge cylindrical surface of the plastic pipe; the heating ring sleeve is used for carrying out non-contact heating on the outer end face of the butt joint side and the outer edge cylindrical surface of the plastic pipe through the inner side face;

the locating support comprises a connecting rod capable of being adjusted in a centering mode and a base, the locating support is connected with the base through the connecting rod, the base is provided with a sliding part matched with the sliding rail, and the locating support can move in position on the sliding rail through the sliding part.

As a further limitation, the elastic ring sleeve is externally connected with a power supply unit and is used as a resistor body to generate heat after being electrified by the power supply unit.

The invention also provides a hot-melt butt joint method of the plastic pipe, which adopts a hot-melt butt joint device to carry out hot-melt butt joint operation on two sections of plastic pipes, and comprises the following specific operation steps:

s1, matching a slip clamp, a butt joint disc, a heating ring sleeve and a gauge barrel according to the size of a plastic pipe to be butt-jointed, and finishing component assembly and equipment adjustment;

s2, cleaning the end face of the butt joint surface of the plastic pipe, and after the cleaning is finished, finishing clamping of the slip clamp and the butt joint disc and assembling of the elastic ring sleeve;

s3, heating and hot-melting the end face of the plastic pipe by using the heating ring sleeve to obtain a hot-melting butt joint face, rapidly withdrawing the heating ring sleeve, and clamping the butt joint disc by using the sliding seat, so that the hot-melting butt joint face of the plastic pipe is extruded and deformed and is filled in the extrusion molding cavity to obtain an annular convex joint wrapping the butt joint face;

s4, utilizing a flange assembly seat to enable the butt joint disc to be kept continuously compressed and cooled for shaping, then utilizing a jacking mechanism to shrink the arc-shaped pressing block for demolding and releasing the elastic ring sleeve, and enabling the elastic ring sleeve to be buried in the annular convex section to form an effect similar to reinforcement of the planted bars; then sequentially removing the slip clamps and the butt joint disc; then taking the gauge barrel out of the tube by using a tool;

s5, performing surface trimming on the butt joint part to obtain the plastic pipe after the butt joint is completed.

The beneficial effects are that: the hot-melt butt joint device for the plastic pipe can be used for carrying out planar hot-melt butt joint on the end face of the plastic pipe with the same diameter, has compact structure, reasonable design and convenient and quick operation, can effectively reduce the operation difficulty of operators, reduces the operation threshold, effectively improves the strength of a connecting position in the butt joint process by ensuring the butt joint pressure and forming a ribbed convex joint outside the butt joint position, has better sealing performance, and can be paved in severe areas such as corrosive soil, earthquake areas, mountain areas, swamps and the like; and can effectively reduce the correction of the later pipeline and improve the working efficiency of hot melting butt joint

Drawings

Fig. 1 is a schematic diagram of an assembly structure according to a preferred embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a detail of the portion a in fig. 1.

FIG. 3 is a schematic view of the tightening pattern of the arc-shaped pressing block according to the preferred embodiment of the invention.

FIG. 4 is a schematic view showing a shrinkage unloading state of the arc pressing block in the preferred embodiment of the invention.

Fig. 5 is a schematic view of the arrangement of the side branches on the elastic loop.

Wherein: 1. a plastic pipe; 2. a slip clamp; 3. a slip clamping part; 4. a butt-joint tray body; 5. a flange assembly seat; 6. a power line; 7. a plate body bracket; 8. the clamping seat can be disassembled; 9. a jacking mechanism; 10. a frame; 11. a fixing seat; 12. a lifting bracket; 13. a slide rail; 14. a connecting rod; 15. a base; 16. a slide; 17. a sliding limiting block; 18. an arc-shaped pressing block; 19. a side branch; 20. an elastic loop; 21. extruding to form a cavity; 22. a heating ring sleeve; 23. a pipe wall of the pipe; 24. a gage barrel; 25. reinforcing ribs.

Detailed Description

The invention is further described in connection with the following embodiments in order to make the technical means, the creation features, the achievement of the purpose and the effect of the invention easy to understand. The described embodiments are only some, but not all, embodiments of the invention.

It should be noted that, in the description of the embodiments of the present invention, unless explicitly specified and limited otherwise, the meaning of "plurality" means two or more, and the terms "mounted", "connected", "fixed" and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two elements or the interaction relationship between the two elements; the specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 to 5, in a preferred embodiment of a hot-melt butt-joint device for plastic pipes, in this embodiment, the hot-melt butt-joint device is used for butt-jointing end surfaces of plastic pipes of the same material with the same pipe diameter, a ring of annular convex sections formed by hot-melting and then pressing end surface materials of the pipes are formed on the outer edges of butt-joint positions of the plastic pipes after the butt-joint is used as a reinforcing structure, and the inside of the annular convex sections serving as the reinforcing structure is reinforced by planting ribs by using an elastic ring sleeve 20 in an annular snake-spring shape, so that the practical use effect of obviously improving the structural strength and the sealing performance of a butt-joint part is achieved.

The hot melting butt joint device of the embodiment comprises a frame 10 serving as a main body supporting structure, wherein a plurality of leveling support legs are arranged at the bottom of the frame 10, and the whole frame 10 can be leveled by adjusting the leveling support legs so as to facilitate subsequent operation. The surface of the frame 10 is fixedly provided with a fixed seat 11 and a sliding rail 13, the fixed seat 11 is fixedly arranged at one end of the sliding rail 13, and the sliding rail 13 is arranged along the length direction of the frame 10. The slide rail 13 is of a double rail structure on which a slider 16 is mounted, the slider 16 being drivable by an external force to displace on the slide rail 13 and to maintain the position at a selected position.

In different embodiments, the moving power of the sliding seat 16 on the sliding rail 13 can be a driving motor or a manual force, when the driving motor is adopted, the position fixing of the sliding seat 16 on the sliding rail 13 is realized through motor braking, and when the manual driving is adopted, the braking device can be a braking device such as a friction plate or a stopping structure such as a push rod and a pin. In order to prevent the slide 16 from dislocation during sliding, a sliding limiting block 17 is arranged at the other end of the sliding rail 13.

The fixing seat 11 and the sliding seat 16 are respectively provided with a slip clamp 2 through the lifting support 12, and the slip clamp 2 can be used for clamping and fixing the plastic pipe 1 to be subjected to hot melting butt joint and can slide on the sliding rail 13 through the sliding seat 16 after clamping so as to facilitate subsequent butt joint operation.

The hot melting butt joint device of this embodiment is provided with the butt joint dish as auxiliary structure in the hot melting butt joint position of plastic tubular product 1, and this butt joint dish is used in pairs, including butt joint dish disk body 4, this butt joint dish disk body 4 has thickness to the convenience is in the inside open cavity of butt joint dish disk body 4 and is arranged components and parts. The back side of the butt-joint disc body 4 is provided with a slip clamping part 3, the slip clamping part 3 is used for clamping and fixing the plastic pipe 1 to be subjected to hot melting butt joint, and in order to ensure the processing performance and reduce the dead weight deformation of the plastic pipe 1 in the processing process, the reserved interval between the butt-joint disc (the tail part of the slip clamping part 3) which is in a clamping state on the single-side plastic pipe 1 and the front part of the slip clamp 2 is controlled to be 3-8 times of the outer diameter of the plastic pipe 1.

The flange assembly seat 5 is arranged on the outer edge of the disc surface of the butt-joint disc body 4, a penetrating hole matched with the plastic pipe 1 and arranged at the center position of the butt-joint disc body 4 and passing through the axle center position of the butt-joint disc body 4, a residual material extrusion seam is formed on the inner side (the side close to the slip clamping part 3) of the penetrating hole position of the butt-joint disc body 4, an extrusion cavity 21 is formed on the outer side of the penetrating hole position of the butt-joint disc body 4, the extrusion cavity 21 is a cylindrical cavity concentric with the penetrating hole, the butt-joint side of the plastic pipe 1 is opened, the inner diameter of the cavity is 1.05-1.20 times of the outer diameter of the plastic pipe 1, and the cavity is used as a forming space for extrusion forming of a hot melting part of the plastic pipe 1.

A plurality of arc-shaped pressing blocks 18 are formed on the outer circumference of the extrusion molding cavity 21; in the embodiment, the number of the arc-shaped pressing blocks 18 is six, an electric push rod is used as a jacking mechanism 9 to drive on the back side, and the corresponding jacking mechanism 9 is formed in a component cavity pre-opened in the butt-joint disc body 4; the six propping mechanisms 9 synchronously feed and withdraw, and the combined patterns of the arc pressing blocks 18 in the feeding and withdrawing states are shown in fig. 3 and 4, and correspond to the contracted arc pressing blocks 18 and the expanded arc pressing blocks 18 respectively; in the contracted state, the six arcuate compacts 18 together form a complete closed circular surface.

An elastic ring set coordinate is formed on the inner side surface of the arc-shaped pressing block 18, and is used for movably assembling the elastic ring sleeve 20. In this embodiment, as shown in fig. 5, the elastic ring 20 is an annular spring formed by spring steel, and surrounds the inner ring surface of the arc-shaped pressing block 18 in a contracted state, the elastic ring 20 is formed with a side branch 19 at the bending position of the annular spring, and a clamping embedding hole matched with the side branch 19 is formed on the inner side surface of the arc-shaped pressing block 18, the elastic ring 20 can be assembled by embedding the side branch 19 in the clamping embedding hole to complete the assembly of the elastic ring 20, and the elastic ring 20 can be in a tensioning state or the side branch 19 of the elastic ring 20 can be withdrawn from the clamping embedding hole by controlling the clamping state of the clamping embedding hole to cooperate with the withdrawal of the pushing mechanism 9.

After being embedded on the arc-shaped pressing block 18 through the side branch 19, the elastic ring sleeve 20 can be externally connected with a power supply unit through a contact arranged on the arc-shaped pressing block 18 corresponding to the clamping embedding hole, and can be used as a resistor body for heating after being electrified through the power supply unit.

The slips fixture 2 and the butt joint disc are of detachable structures, and the adaptation to plastic pipes 1 with different pipe diameters can be realized by detaching and replacing the slips fixture 2 and the butt joint disc.

The butt-joint disc and the gauge barrel 24 are of a combined use structure, the butt-joint disc is sleeved at the end part of the outer tube surface of the plastic tube 1 during assembly, the gauge barrel 24 supports the inner tube surface of the gauge barrel 24 at the inner side of the plastic tube 1, and the gauge barrel 24 has an outer diameter matched with the inner diameter of the plastic tube 1 so as to facilitate movable insertion of the gauge barrel into the tube cavity of the plastic tube 1.

In order to ensure the movable performance of the gauge barrel 24 in the lumen of the plastic pipe 1, a lubricating ceramic coating or a Teflon coating which is convenient for demoulding is formed on the outer cylinder surface of the corresponding gauge barrel; and reinforcing ribs 25 are arranged on the inner cylinder surface of the diameter-keeping cylinder 24 corresponding to the hot melting butt joint side to carry out compression-resistant support of the diameter-keeping cylinder.

The machine frame 10 is also provided with a heating plate, the heating plate comprises a plate body support 7, the top of the plate body support 7 is electrically connected with the mains supply through a power line 6, the lower part of the plate body support 7 is connected with a base 15 through a connecting rod 14, the bottom surface of the base 15 is provided with a double-rail sliding groove matched with the sliding rail 13, and the base 15 can be movably arranged on the sliding rail 13 through the double-rail sliding groove and can slide along the sliding rail 13; the connecting rod 14 is a telescopic rod body with a damping universal joint at the bottom and can be used for adjusting the position of the plate support 7 so as to realize centering. The two side surfaces of the plate body support 7 are provided with detachable clamping seats 8, and a heating ring sleeve 22 is movably assembled through the detachable clamping seats 8, the ring section of the heating ring sleeve 22 is of an L-shaped structure matched with the size of the plastic pipe 1, the vertical surface of the heating ring sleeve corresponds to the outer end surface of the butt joint side of the plastic pipe 1, and the horizontal surface corresponds to the outer edge cylindrical surface of the plastic pipe 1; the heating ring sleeve 22 heats the butt-joint side outer end surface and the outer edge cylindrical surface of the plastic pipe 1 in a non-contact way through the inner side surface.

The hot-melting butt joint device for plastic pipes of the embodiment performs the hot-melting butt joint operation on two plastic pipes according to the following operation steps:

firstly, selecting a slip clamp 2, a butt joint disc, a heating ring sleeve 22 and a gauge protection barrel 24 which are matched according to the selected size specification of a plastic pipe 1, assembling the slip clamp 2 and the heating ring sleeve 22 on equipment, and completing the position calibration, leveling and centering operation of all parts of the equipment; the assembly of the rear elastic collar 20 is then completed on the arcuate block 18.

Then, the two plastic pipes 1 to be butted are assembled and fixed in position by using slip clamps 2 on two sides respectively, leveling is carried out by using tools such as a bottom liner, a cushion block and the like if necessary, then the end face of the plastic pipe 1 is peeled by using a milling cutter, the joint end of the plastic pipe 1 is assembled with a joint disc by using a slip clamping part 3 at the adjusted position interval, and the outer end of the plastic pipe 1 slightly extends out of the surface of the joint disc.

The inner tube of the plastic tube 1 is filled with the gauge protection tube 24, then the plate body bracket 7 is placed between the two butt joint plates and kept in an electrified state, the outer end surfaces of the two plastic tubes 1 are subjected to hot melting by moving the base 15 and the sliding seat 16, and the surface of the plastic tube 1 is covered by the L-shaped heating ring sleeve 22, so that the hot melting area reaches a preset depth.

If the space in the extrusion molding cavity 21 is smaller, the arc-shaped pressing block 18 can clamp the side branch 19 when the heating ring 22 is not put in, and the size of the extrusion molding cavity 21 is increased by the retraction mode of the jacking mechanism 9 to adapt to the heating ring 22.

After the heating time is reached, the end part of the pipe is melted, the sliding seat 16 is withdrawn after the melting is completed, the plate body bracket 7 is removed, the arc pressing block 18 is formed into a contracted state as shown in figure 3 by utilizing the jacking mechanism 7, and the elastic ring sleeve 20 is electrified to continuously heat; the slide 16 is then pushed against the fixed seat 11 and the two butt-joint disk bodies 4 remain pressed.

In the compressed state, the end face hot-melt portion of the plastic tube 1 is deformed, and the extrusion molding cavity 21 and the excess material extrusion slit at the outer edge of the extrusion molding cavity 21 are filled under the extrusion force to perform plasticity.

In the shaping link after the completion of plasticity, the flange assembly seat 5 is fixed by using bolts, then the power supply of the heating ring sleeve 22 is disconnected to stop heating, the slip fixture 2 and the butt joint disc are sequentially dismantled after the hot melting butt joint part is cooled, when the butt joint disc is dismantled, the elastic ring sleeve 20 is released by releasing the side branch 19 on the arc-shaped pressing block 18, then the gauge barrel 24 is taken out from the pipe, then the plastic pipe is trimmed and beautified, and the exposed part of the side branch 19 is polished and treated, thus the plastic pipe with the butt joint being completed is obtained.

The hot melting butt joint device of the embodiment can obtain an outer wrapping butt joint position and an annular convex joint matched with the size of the extrusion molding cavity 21 at the end face butt joint position of the plastic pipe 1; the excess small plastic portion is formed into an excessive edge by the excess material extrusion slit at the outer edge of the extrusion molding cavity 21.

Meanwhile, the elastic ring sleeve 20 is integrally embedded into the annular convex joint to form a bar planting structure, and the structural strength and stability of the annular convex joint are ensured by an anchoring effect. Meanwhile, the butt joint structure after molding has the advantages of good molding stability, good external impact resistance, good pipe internal pressure resistance, smooth inner pipe surface and no need of post-correction after molding, and the use performance of the pipe fitting is ensured while the cost of additional materials such as glue, sealing materials and the like which are needed in the post-correction process is avoided.

In addition, in the operation process, the whole process of electric heating melting and butt joint forming does not need to be judged, but the tool structure is utilized for guiding, so that the problems of scalding or scratching and the like can be avoided while the operation difficulty is reduced.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A hot melt interfacing apparatus for plastic tubular product, its characterized in that includes the frame and sets up the hot melt interfacing assembly in the frame, the hot melt interfacing assembly includes:

2. The hot-melt butt joint device for plastic pipes according to claim 1, wherein the slip clamp and the butt joint disc are of detachable structures, and the adaptation to plastic pipes with different pipe diameters can be realized by detaching and replacing the slip clamp and the butt joint disc.

3. The hot-melt butt-joint device for plastic pipes according to claim 1, wherein the slip clamps are assembled on a lifting bracket and are assembled on a frame through the lifting bracket, and the slip clamps on two sides of the frame level and center the plastic pipes on the Z-axis position through the lifting bracket.

4. The hot-melt butt joint device for plastic pipes according to claim 1, wherein the clamping positions of the two-side slip clamps and the butt joint disc on the plastic pipe are symmetrical, and the reserved interval between the clamping position of the single-side slip clamp on the plastic pipe and the clamping position of the butt joint disc on the side plastic pipe is 3-8 times of the outer diameter of the plastic pipe.

5. The hot-melt butt joint device for plastic pipes according to claim 1, wherein the cavity inner diameter of the extrusion molding cavity is 1.05-1.20 times the outer diameter of the plastic pipe.

6. The hot-melt butt joint device for plastic pipes according to claim 1, wherein the tightening mechanism formed on the back side of the arc-shaped pressing block is a hydraulic tightening mechanism or an electric tightening mechanism.

7. The hot-melt butt joint device for plastic pipes according to claim 1, wherein the elastic ring sleeve is an annular snake spring formed by spring steel, side branches are formed at bending positions of the annular snake spring, clamping embedded holes matched with the side branches are formed at the inner sides of the arc-shaped pressing blocks, the elastic ring sleeve is assembled by embedding the side branches at the positions of the clamping embedded holes, and the side branches of the elastic ring sleeve can be retracted out of the clamping embedded holes by a jacking mechanism.

8. The hot-melt butt joint device for plastic pipes according to claim 1, wherein the heating plate comprises a plate body support, the heating ring sleeves are formed on two side surfaces of the plate body support and are of detachable assembly structures, and the heating ring sleeves are externally connected with a power supply through the plate body support; the ring section of the heating ring sleeve is of an L-shaped structure matched with the plastic pipe in size, the vertical surface of the heating ring sleeve corresponds to the outer end surface of the butt joint side of the plastic pipe, and the horizontal surface of the heating ring sleeve corresponds to the outer edge cylindrical surface of the plastic pipe; the heating ring sleeve is used for carrying out non-contact heating on the outer end face of the butt joint side and the outer edge cylindrical surface of the plastic pipe through the inner side face;

9. The hot-melt butt joint device for plastic pipes according to claim 1, wherein the elastic ring sleeve is externally connected with a power supply unit and is used as a resistor body for heating after being electrified by the power supply unit.

10. A method for hot-melt butt-jointing of plastic pipes, characterized in that the hot-melt butt-jointing device for plastic pipes according to any one of claims 1 to 9 is used for hot-melt butt-jointing of two sections of plastic pipes, and the operation steps are as follows: