PP-R double-layer pipe rapid hot-melt butt joint device

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The design of the limiting plate and clamping plate enables precise docking and rapid cooling of PP-R double-layer pipes, solving the problem of insufficient positioning and clamping accuracy in existing devices, and improving the stability of the connection and construction efficiency.

CN224490101UActive Publication Date: 2026-07-14LIAONING ZHONGNAN CONSTRUCTION ENGINEERING CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: LIAONING ZHONGNAN CONSTRUCTION ENGINEERING CO LTD
Filing Date: 2025-08-20
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

The existing PP-R double-layer pipe rapid hot-melt butt welding device has insufficient positioning and clamping accuracy for the pipe, low stability, resulting in poor connection sealing and strength, and slow cooling speed, which affects construction efficiency.

Method used

It adopts a limit plate and clamping plate structure, and uses the elastic force of springs to achieve the initial centering and self-adaptive clamping of the pipe. Combined with the lifting cylinder and electric push rod, it drives the hot melt die head to accurately dock, and accelerates cooling through the air outlet.

Benefits of technology

It improves the accuracy and stability of pipeline positioning, ensures the quality of welding, enhances the sealing and strength of the connection, shortens the construction cycle, and improves work efficiency.

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Abstract

The utility model discloses a kind of PP-R double-layer pipe quick hot-melt butt joint devices, including support seat;Still include limiting plate and clamping plate, the upper end of support seat is equipped with installation cavity, the upper end of installation cavity is fixedly connected with lifting cylinder, the output end of lifting cylinder is fixedly connected with hot-melt machine die head, lifting cylinder is used to drive hot-melt machine die head to go up and down, the left and right ends of hot-melt machine die head are fixedly connected with support rod, the outside of support rod is fixedly connected with spring, the end of spring away from support rod is limiting plate, the left and right sides of support seat upper end are fixedly connected with electric push rod by mounting block symmetry, the output end of electric push rod is fixedly connected with sliding seat, electric push rod is used to drive sliding seat to move;The utility model uses limiting plate and clamping plate, realizes initial centering, improves pipeline positioning accuracy, guarantees fusion quality, two connecting rods drive clamping plate to make relative motion and move same distance, realize the self-adapting clamping of different pipe diameter pipeline.

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Description

Technical Field

[0001] This utility model relates to the field of PP-R pipe splicing technology, and in particular to a rapid hot-melt splicing device for PP-R double-layer pipes. Background Technology

[0002] In the fields of building water supply and drainage, HVAC, etc., PP-R double-layer pipes are widely used due to their good thermal insulation and corrosion resistance. Hot-melt butt welding devices are used to achieve fast and efficient connection of PP-R double-layer pipes. Through automated or semi-automated methods, the quality and efficiency of the connection can be improved and the risks of manual operation can be reduced.

[0003] The existing PP-R double-layer pipe rapid hot-melt butt welding device has a relatively simple structure, insufficient positioning and clamping accuracy of the pipe, low stability, and is prone to eccentricity and misalignment during pipe hot-melt butt welding, which affects the sealing and strength of the connection, poses a risk of water leakage, and has a slow cooling after hot-melt, which prolongs the construction period and reduces work efficiency.

[0004] Therefore, in order to address the problems of insufficient positioning and clamping accuracy and low stability of the existing PP-R double-layer pipe rapid hot-melt butt welding device, a new PP-R double-layer pipe rapid hot-melt butt welding device can be designed. Utility Model Content

[0005] In order to overcome the problems of insufficient positioning and clamping accuracy and low stability of existing PP-R double-layer pipe rapid hot-melt butt welding devices.

[0006] The technical solution of this utility model is as follows: a PP-R double-layer tube rapid hot melt butt welding device, including a support base; it also includes a limiting plate and a clamping plate. The upper end of the support base has an installation cavity. A lifting cylinder is fixedly connected to the upper end of the installation cavity. A hot melt die head is fixedly connected to the output end of the lifting cylinder. The lifting cylinder is used to drive the hot melt die head to move up and down. Support rods are fixedly connected to both ends of the hot melt die head. A spring is fixedly connected to the outer side of the support rod. A limiting plate is located at the end of the spring away from the support rod. Electric push rods are symmetrically fixedly connected to both sides of the upper end of the support base through mounting blocks. A slide block is fixedly connected to the output end of the electric push rod. The electric push rod is used to drive the slide block to move. Connecting rods are symmetrically slidably connected to the upper end of the slide block. A clamping plate is fixedly connected to the ends of the two connecting rods that are close to each other. An air outlet is fixedly connected to the upper end of the inner wall of the installation cavity.

[0007] Preferably, two PP-R double-layer pipes to be joined are placed on the two side slides respectively, so that the ends of the pipes are fitted onto the outside of the limiting plate. Under the elastic force of the spring, the limiting plate is evenly attached to the inner wall of the pipe. The two connecting rods drive the clamping plate to move relative to each other and move the same distance to achieve clamping. The hot melt die head is started to heat up to the required temperature. The two electric push rods push the slides respectively to make the pipe ends accurately joined with the hot melt die head. After hot melting, the electric push rods quickly retract, and the lifting cylinder drives the hot melt die head to descend into the installation cavity. The electric push rods are started again to drive the ends of the two pipes to approach each other and join. The joined pipes are cooled through the air outlet.

[0008] Preferably, a telescopic rod is sleeved inside the spring, with one end of the telescopic rod fixedly connected to the support rod and the other end of the telescopic rod fixedly connected to the corresponding limiting plate.

[0009] As a preferred option, the limiting plate has an arc-shaped structure design, and three limiting plates are distributed in a ring array. A rubber anti-slip pad is fixedly connected to the end of the limiting plate away from the support rod, and the clamping surface of the rubber anti-slip pad is evenly provided with anti-slip protrusions.

[0010] Preferably, there are two sets of clamping plates, with two clamping plates symmetrically arranged in each set. The ends of the two clamping plates that are close to each other are fixedly connected with the same rubber anti-slip pads.

[0011] Preferably, the lower end of the slide is slidably connected to the support seat, and the upper end of the slide is provided with an adjustment cavity. A bidirectional threaded rod is rotatably connected inside the adjustment cavity, and the two ends of the bidirectional threaded rod are threadedly connected to the lower end of the connecting rod.

[0012] Preferably, an adjustment motor is fixedly connected to the front end of the slide, and the output shaft of the adjustment motor is fixedly connected to the bidirectional threaded rod. The adjustment motor is used to drive the bidirectional threaded rod to rotate.

[0013] Preferably, there are two sets of air outlets arranged symmetrically on the left and right, with two air outlets in each set. A fan is fixedly connected to the upper end of the mounting cavity, and a connecting pipe is fixedly connected to the upper end of the fan. The end of the connecting pipe away from the fan is fixedly connected to the lower end of the air outlet.

[0014] The beneficial effects of this utility model are:

[0015] This PP-R double-layer pipe rapid hot-melt butt welding device uses a limiting plate and a clamping plate to allow the pipe end to fit onto the outside of the limiting plate. Under the elastic force of the spring, the limiting plate evenly conforms to the inner wall of the pipe, achieving initial centering positioning, improving pipe positioning accuracy, and ensuring welding quality. Two connecting rods drive the clamping plate to move relative to each other and move the same distance, achieving adaptive clamping for pipes of different diameters, improving applicability and stability. The device is convenient and efficient to operate. The hot-melt die head is heated to the required temperature, and two electric push rods push the slide block to precisely align the pipe end with the hot-melt die head. After hot-melt welding, the electric push rods quickly retract, and the lifting cylinder drives the hot-melt die head to descend into the installation cavity. The electric push rods are activated again to bring the two pipe ends closer together and align them. The aligned pipes are cooled through the air outlet, improving cooling speed and aligning efficiency. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the present invention.

[0017] Figure 2 The diagram shown is a three-dimensional cross-sectional view of the present invention.

[0018] Figure 3 The diagram shown is a schematic representation of the limiting plate structure of this utility model.

[0019] Figure 4 The diagram shown is a schematic representation of the clamping plate structure of this utility model.

[0020] Figure 5 The diagram shown is a schematic of the air outlet structure of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Support base; 2. Mounting cavity; 3. Lifting cylinder; 4. Hot melt die head; 5. Support rod; 6. Spring; 7. Limiting plate; 8. Electric push rod; 9. Slide seat; 10. Connecting rod; 11. Clamping plate; 12. Air outlet; 13. Telescopic rod; 14. Rubber anti-slip pad; 15. Adjustment cavity; 16. Two-way threaded rod; 17. Adjustment motor; 18. Fan; 19. Connecting pipe. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figures 1-5This utility model provides an embodiment: a rapid hot-melt butt welding device for PP-R double-layer pipes, including a support base 1; it also includes a limiting plate 7 and a clamping plate 11. An installation cavity 2 is formed at the upper end of the support base 1. A lifting cylinder 3 is fixedly connected to the upper end of the installation cavity 2. A hot-melt die head 4 is fixedly connected to the output end of the lifting cylinder 3. The lifting cylinder 3 is used to drive the hot-melt die head 4 to move up and down. Support rods 5 are fixedly connected to both ends of the hot-melt die head 4. A spring 6 is fixedly connected to the outer side of the support rod 5. A limiting plate 7 is located at the end of the spring 6 away from the support rod 5. Electric push rods 8 are symmetrically fixedly connected to both sides of the upper end of the support base 1 via mounting blocks. A slide 9 is fixedly connected to the output end of the electric push rod 8. The electric push rod 8 is used to drive the slide 9 to move. Connecting rods 10 are symmetrically slidably connected to the upper end of the slide 9. Clamping plates 11 are fixedly connected to the ends of the two connecting rods 10 that are close to each other. The upper end of the inner wall of the installation cavity 2 is fixed... With an air outlet 12 connected, during use, two PP-R double-layer pipes to be joined are placed on the two side slides 9 respectively, so that the ends of the pipes are fitted onto the outside of the limiting plate 7. Under the elastic force of the spring 6, the limiting plate 7 is evenly attached to the inner wall of the pipe, achieving initial centering positioning, improving the positioning accuracy of the pipes, and ensuring the welding quality. The two connecting rods 10 drive the clamping plate 11 to move relative to each other and move the same distance, achieving adaptive clamping for pipes of different diameters, improving applicability and stability, and making operation convenient and efficient. The hot melt die head 4 is started to heat up to the required temperature, and the two electric push rods 8 push the slides 9 respectively, so that the ends of the pipes are accurately joined with the hot melt die head 4. After hot melting, the electric push rods 8 quickly retract, and the lifting cylinder 3 drives the hot melt die head 4 to descend into the installation cavity 2. The electric push rods 8 are started again to drive the ends of the two pipes to approach each other and join. The joined pipes are cooled through the air outlet 12, improving the cooling speed and joining efficiency.

[0024] Please see Figure 2 , Figure 3 and Figure 4 In this embodiment, a telescopic rod 13 is sleeved inside the spring 6. One end of the telescopic rod 13 is fixedly connected to the support rod 5, and the other end of the telescopic rod 13 is fixedly connected to the corresponding limiting plate 7. The telescopic rod 13 controls the movement path of the spring 6 and increases the clamping force. The limiting plate 7 has an arc-shaped structure design, and there are three limiting plates 7 arranged in a ring array. A rubber anti-slip pad 14 is fixedly connected to the end of the limiting plate 7 away from the support rod 5. The clamping surface of the rubber anti-slip pad 14 is uniformly provided with anti-slip protrusions. The ring array of limiting plates 7 makes the pipe relatively centered. There are two sets of clamping plates 11. Each set of clamping plates 11 has two clamping plates 11 arranged symmetrically front and back. The ends of the two clamping plates 11 that are close to each other are fixedly connected with the same rubber anti-slip pad 14. The rubber anti-slip pad 14 enhances the stability of the pipe limit and improves the stability of the pipe connection.

[0025] Please see Figure 1 , Figure 4 andFigure 5 In this embodiment, the lower end of the slide block 9 is slidably connected to the support base 1, and the upper end of the slide block 9 is provided with an adjustment cavity 15. A bidirectional threaded rod 16 is rotatably connected inside the adjustment cavity 15. The two ends of the outer side of the bidirectional threaded rod 16 are threadedly connected to the lower end of the connecting rod 10. Rotating the bidirectional threaded rod 16 drives the two connecting rods 10 to move relative to each other and move the same distance. An adjustment motor 17 is fixedly connected to the front end of the slide block 9. The output shaft of the adjustment motor 17 is fixedly connected to the bidirectional threaded rod 16. The adjustment motor 17 is used to drive the slide block 9. The bidirectional threaded rod 16 rotates, and the adjusting motor 17 drives the bidirectional threaded rod 16 to rotate. There are two sets of air outlets 12 arranged symmetrically on the left and right sides, and each set of air outlets 12 has two outlets. The upper end of the mounting cavity 2 is fixedly connected to the fan 18, and the upper end of the fan 18 is fixedly connected to the connecting pipe 19. The end of the connecting pipe 19 away from the fan 18 is fixedly connected to the lower end of the air outlet 12. The fan 18 delivers air through the connecting pipe 19 to the four air outlets 12 to cool the PP-R double-layer pipe after hot melting and improve the cooling speed.

[0026] During operation, two PP-R double-layer pipes to be joined are placed on the two side slides 9 respectively, so that the ends of the pipes are fitted onto the outside of the limiting plate 7. Under the elastic force of the spring 6, the limiting plate 7 evenly fits against the inner wall of the pipe, achieving initial centering positioning. The adjusting motor 17 drives the bidirectional threaded rod 16 to rotate, and the connecting rod 10 drives the clamping plate 11 to move relative to each other and move the same distance, achieving adaptive clamping for pipes of different diameters, improving applicability and stability, and making operation convenient and efficient. The hot melt die head 4 is started to heat up to the required temperature, and the two electric push rods 8 push the slides 9 respectively, so that the ends of the pipes are precisely joined with the hot melt die head 4. After hot melting, the electric push rods 8 quickly retract, and the lifting cylinder 3 drives the hot melt die head 4 to descend into the installation cavity 2. The electric push rods 8 are started again to drive the ends of the two pipes to approach each other and join. The fan 18 delivers air through the connecting pipe 19 to the four air outlets 12 to cool the hot melted PP-R double-layer pipes, improving the cooling speed and joining efficiency.

[0027] Through the above steps, the limiting plate 7 is evenly attached to the inner wall of the pipe under the elastic force of the spring 6, achieving initial centering positioning, improving the positioning accuracy of the pipe, and ensuring the welding quality. The two clamping plates 11 move relative to each other and move the same distance, achieving adaptive clamping for pipes of different diameters, improving applicability and stability, and making operation convenient and efficient. The air outlet 12 improves the cooling speed, thus solving the problems of insufficient positioning and clamping accuracy and low stability of the existing PP-R double-layer pipe rapid hot melt butt welding device.

Claims

1. A rapid hot-melt butt welding device for PP-R double-layer pipes, comprising a support base (1); characterized in that: It also includes a limit plate (7) and a clamping plate (11). The upper end of the support base (1) is provided with an installation cavity (2). The upper end of the installation cavity (2) is fixedly connected to a lifting cylinder (3). The output end of the lifting cylinder (3) is fixedly connected to a hot melt die head (4). The lifting cylinder (3) is used to drive the hot melt die head (4) to move up and down. The left and right ends of the hot melt die head (4) are fixedly connected to support rods (5). The outside of the support rods (5) is fixedly connected to a spring (6). The spring (6) is away from the support rod. (5) One end limit plate (7), the left and right sides of the upper end of the support base (1) are symmetrically fixedly connected with electric push rods (8) through mounting blocks, the output end of the electric push rod (8) is fixedly connected with a slide (9), the electric push rod (8) is used to drive the slide (9) to move, the upper end of the slide (9) is symmetrically slidably connected with connecting rods (10), the ends of the two connecting rods (10) that are close to each other are fixedly connected with clamping plates (11), and the upper end of the inner wall of the mounting cavity (2) is fixedly connected with an air outlet (12).

2. The rapid hot-melt butt welding device for PP-R double-layer tubes according to claim 1, characterized in that: A telescopic rod (13) is sleeved inside the spring (6). One end of the telescopic rod (13) is fixedly connected to the support rod (5), and the other end of the telescopic rod (13) is fixedly connected to the corresponding limiting plate (7).

3. The rapid hot-melt butt welding device for PP-R double-layer tubes according to claim 1, characterized in that: The limiting plate (7) has an arc-shaped structure design, and there are three limiting plates (7) arranged in a ring array. The end of the limiting plate (7) away from the support rod (5) is fixedly connected to a rubber anti-slip pad (14), and the clamping surface of the rubber anti-slip pad (14) is evenly provided with anti-slip protrusions.

4. The rapid hot-melt butt welding device for PP-R double-layer tubes according to claim 3, characterized in that: Two sets of clamping plates (11) are provided. Each set of clamping plates (11) has two clamping plates (11) arranged symmetrically in front and behind. The ends of the two clamping plates (11) that are close to each other are fixedly connected with the same rubber anti-slip pads (14).

5. The rapid hot-melt butt welding device for PP-R double-layer tubes according to claim 1, characterized in that: The lower end of the slide (9) is slidably connected to the support seat (1), and the upper end of the slide (9) is provided with an adjustment cavity (15). The interior of the adjustment cavity (15) is rotatably connected to a bidirectional threaded rod (16), and the two ends of the bidirectional threaded rod (16) are threadedly connected to the lower end of the connecting rod (10).

6. The rapid hot-melt butt welding device for PP-R double-layer tubes according to claim 5, characterized in that: An adjusting motor (17) is fixedly connected to the front end of the slide (9). The output shaft of the adjusting motor (17) is fixedly connected to the bidirectional threaded rod (16). The adjusting motor (17) is used to drive the bidirectional threaded rod (16) to rotate.

7. The rapid hot-melt butt welding device for PP-R double-layer tubes according to claim 1, characterized in that: Two sets of air outlets (12) are symmetrically arranged on the left and right sides. Each set of air outlets (12) has two outlets. A fan (18) is fixedly connected to the upper end of the mounting cavity (2). A connecting pipe (19) is fixedly connected to the upper end of the fan (18). The end of the connecting pipe (19) away from the fan (18) is fixedly connected to the lower end of the air outlet (12).