PPR pipe outside heat preservation layer sleeving device and installation method

Abstract

The application relates to the field of pipeline thermal insulation sleeve installation devices, and particularly discloses a PPR pipe outer thermal insulation layer sleeve setting device and an installation method, which comprises a fixing frame, first support plates and second support plates are arranged at two ends of the fixing frame, a plug-in seat matched with a pipeline is arranged on one side of the first support plate close to the second support plate, a gas injection hole is formed in the plug-in seat, a clamping hole is formed through the second support plate, two clamping rods are slidably connected on the clamping hole, clamping springs for driving the two clamping rods to move close to each other are arranged on the clamping hole, a sliding seat is slidably connected on the fixing frame, a clamping ring is arranged on the sliding seat, a plurality of clamping hooks are arranged on the clamping ring, the clamping hooks are plugged into a thermal insulation sleeve, a first driving assembly is arranged on the sliding seat, a second driving assembly is arranged on the sliding seat, and a supporting assembly is arranged on the fixing frame. The application has the effect of improving the convenience of sleeving an O-shaped thermal insulation sleeve on a pipeline.

Description

Technical Field

[0001] This application relates to the field of pipe insulation sleeve installation devices, and in particular to a device and method for installing an outer insulation layer on a PPR pipe. Background Technology

[0002] Pipelines are primarily used for fluid transportation. During use, insulation sleeves are typically installed on pipelines. This serves two purposes: firstly, it provides insulation, reducing heat exchange between the fluid inside the pipeline and the external environment, thus improving the stability of fluid transport; secondly, the insulation sleeve reduces damage to the pipeline, ensuring its service life. In existing technologies, insulation sleeves are mostly made of sponge or insulating materials, and the finished sleeves are C-shaped or O-shaped. C-shaped insulation sleeves are directly wrapped around the pipeline and secured with tape or other fastening devices. However, gaps are prone to appear at the ends of C-shaped insulation sleeves, reducing their protective effect on the pipeline. O-ring insulation sleeves are directly fitted onto the finished pipe. To improve the stability of the O-ring insulation sleeve, the inner diameter of the O-ring insulation sleeve abuts against the outer diameter of the pipe, thus securing the O-ring insulation sleeve more firmly. However, this also results in greater resistance between the O-ring insulation sleeve and the pipe. When the pipe is short, workers can easily fit the sleeve on. But when the pipe is long, the resistance between the O-ring insulation sleeve and the pipe increases, making it difficult for workers to fit the sleeve on directly and reducing the ease of installation.

[0003] To address this, the inventor provides a device and method for installing an outer insulation layer on a PPR pipe. Summary of the Invention

[0004] To improve the ease of installing O-ring insulation sleeves on pipelines, this application provides a device and method for installing the outer insulation layer of a PPR pipe.

[0005] The technical solution provided in this application for a device and method for installing an outer insulation layer on a PPR pipe is as follows:

[0006] A device and installation method for installing an outer insulation layer on a PPR pipe includes a fixing frame. A first support plate and a second support plate are respectively provided at both ends of the fixing frame. A plug-in seat for inserting into the pipe is provided on the side of the first support plate near the second support plate. An air injection hole is provided in the plug-in seat. A clamping hole is provided through the second support plate. Two clamping rods are slidably connected to the clamping hole. A clamping spring is provided on the clamping hole to drive the two clamping rods closer together. A sliding seat is slidably connected to the fixing frame and is slidably disposed between the first and second support plates. A clamping ring is provided on the sliding seat, and multiple clamping hooks are provided on the clamping ring. The clamping hooks are inserted into the insulation sleeve. A first driving component is provided on the sliding seat to drive the clamping hooks to move away from the insulation sleeve. A second driving component is provided on the sliding seat to drive the sliding seat to slide along the line connecting the first and second support plates. A support component for supporting the pipe is provided on the fixing frame.

[0007] By adopting the above technical solution, when installing the insulation sleeve, the cut pipe is placed on the support assembly, with one end of the pipe abutting against the plug-in seat. Gas is injected into the pipe through the air injection hole. The insulation sleeve is then passed between two clamping rods, which clamp the insulation sleeve, thereby sealing one end of the insulation sleeve and reducing gas leakage at the end of the insulation sleeve. This allows the insulation sleeve to move closer to the sliding seat. At the same time, the clamping hooks are inserted into the insulation sleeve. With the cooperation of the first drive assembly, multiple clamping hooks move away from the insulation sleeve, thereby expanding one end of the insulation sleeve. With the cooperation of the second drive assembly, the insulation sleeve is put onto the pipe. At this time, an air film is formed between the insulation sleeve and the pipe, reducing the friction between the insulation sleeve and the pipe. This allows the insulation sleeve to be put onto the pipe more smoothly, improving the convenience of insulation sleeve installation.

[0008] Optionally, the first driving assembly includes a clamping slide rod inserted into a clamping ring, the clamping slide rod being radially slidable along the clamping ring, the clamping hook being fixed to the clamping slide rod, a driving ring being rotatably connected to the clamping ring, the driving ring being disposed through the clamping slide rod, a plurality of driving grooves being formed on the outer wall of the driving ring, a plurality of abutting grooves being formed on the clamping ring abutting against the driving grooves, a first driving member being rotatably disposed on the sliding seat for driving the driving ring to rotate, rotating the driving ring and causing the clamping hook to move away from the insulation sleeve, a return spring being sleeved on the clamping slide rod, the return spring being used to drive the clamping hook away from the clamping ring.

[0009] By adopting the above technical solution, the first driving component drives the driving ring to rotate, and under the action of the driving inclined surface and the abutting inclined surface, the end of the insulation sleeve can be expanded more stably from the clamping hook. With this design, the center of the expanded insulation sleeve can still be on the same straight line as the center of the pipeline, so that the insulation sleeve can be more smoothly fitted onto the pipeline and the stability of the insulation sleeve fitting can be improved.

[0010] Optionally, the clamping ring is provided with connecting sliders on both sides, and the sliding seat is provided with adjusting grooves on both sides. The adjusting grooves are opened along the length direction close to the fixed frame, and locking bolts are inserted into the adjusting grooves. The locking bolts are threadedly connected to the connecting sliders.

[0011] By adopting the above technical solution, the height of the clamping ring can be adjusted, thus making it more suitable for pipes of various sizes and improving the versatility of the installation structure.

[0012] Optionally, the fixing frame is provided with a sliding groove, and the sliding seat is provided with a sliding block that slides and engages with the sliding groove; the second driving assembly includes a mounting plate fixed to one side of the sliding block, a second driving member is provided on the mounting plate, a driving wheel is rotatably connected to the second driving member, and the driving wheel abuts against one side wall of the sliding groove.

[0013] By adopting the above technical solution, the sliding block and the sliding groove cooperate to make the fixed frame slide more stably. In addition, with the second driving component and the driving wheel, the sliding seat can slide more smoothly, improving the stability of using the sliding seat.

[0014] Optionally, the fixing frame is provided with a sliding groove, and the sliding seat is provided with a sliding block that slides and engages with the sliding groove; the second driving assembly includes a mounting plate fixed to one side of the sliding block, a second driving member is provided on the mounting plate, a driving wheel is rotatably connected to the second driving member, and the driving wheel abuts against one side wall of the sliding groove.

[0015] By adopting the above technical solution, the sliding block and the sliding groove cooperate to make the fixed frame slide more stably. In addition, with the second driving component and the driving wheel, the sliding seat can slide more smoothly, improving the stability of using the sliding seat.

[0016] Optionally, a protective cover is fitted onto the rotating wheel.

[0017] By adopting the above technical solutions, the use of protective sleeves can reduce impacts on the pipe surface, reduce damage to the pipe, and improve the stability of the installation structure.

[0018] Optionally, the fixing frame is provided with a pressing groove, which is opened along the sliding direction of the sliding seat. The second support plate is provided with a pressing slider that slides and cooperates with the pressing groove on the side near the fixing frame. A tension spring is provided in the pressing groove for pulling the first support plate to slide closer to the second support plate.

[0019] By adopting the above technical solution and using a tension spring, the second support plate can be better pressed against the pipe, thereby improving the stability of the pipe fixation.

[0020] Optionally, the outer diameter of the connector gradually decreases along the direction close to the second support plate.

[0021] By adopting the above technical solution and using plug-in sockets with gradually decreasing inner diameters, it is applicable to pipes of various sizes, improving the accuracy of pipe positioning and the sealing effect of the pipe.

[0022] Optionally, the fixing frame consists of two rotating plates that are hinged together. One of the rotating plates is rotatably connected to a locking plate, and the locking plate has a snap-fit ​​groove on its side. The other rotating plate is provided with a snap-fit ​​block that engages with the snap-fit ​​groove.

[0023] By adopting the above technical solution, a fixed frame is formed by two hinged rotating plates. The length of the fixed frame can be greatly reduced by folding, which improves the convenience of using and installing the structure.

[0024] A method for installing an outer insulation layer on a PPR pipe includes the following steps:

[0025] S1, Cutting the pipe: The staff cuts the pipe to the appropriate length;

[0026] S2, Pipe installation: Place the pipe on the support assembly and insert one end of the pipe into the connector.

[0027] S3, Insulation sleeve fixation: Pass the insulation sleeve between the two clamping rods and use the clamping spring to seal one end of the pipe. Then move the insulation sleeve closer to the clamping hook and insert the clamping hook into the insulation sleeve.

[0028] S4, expand the insulation sleeve by driving multiple clamping hooks to move away from the insulation sleeve through the first drive component, thereby opening one end of the insulation sleeve;

[0029] S5, install the insulation sleeve, the second drive component drives the insulation sleeve to move closer to the pipe, and at the same time, gas is injected into the pipe through the air injection hole. The gas passes through the insulation sleeve and is discharged through the gap between the insulation sleeve and the pipe, and forms an air film in the gap to reduce resistance.

[0030] S6. Disassemble the pipe. When the sliding seat approaches the first support plate, the clamping hook resets under the action of the first drive component. The worker takes out the pipe with the insulation sleeve on, completing the work of installing the insulation sleeve on the pipe.

[0031] By adopting the above technical solution, by injecting gas into the pipeline and allowing the gas to be discharged from the gap between the insulation sleeve and the pipeline, an air film is formed, which can greatly reduce the friction between the insulation sleeve and the pipeline. This allows the insulation sleeve to be installed on the pipeline more smoothly, improving the convenience of installing O-type insulation sleeves on pipelines.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. When installing the insulation sleeve, place the cut pipe on the support assembly, with one end of the pipe abutting against the plug-in seat. Inject gas into the pipe through the air injection hole. Pass the insulation sleeve between the two clamping rods, which clamp the insulation sleeve, thus sealing one end of the insulation sleeve and reducing gas leakage at the end of the insulation sleeve. Move the insulation sleeve closer to the sliding seat. At the same time, insert the clamping hooks into the insulation sleeve. With the help of the first drive assembly, move the multiple clamping hooks away from the insulation sleeve, thereby expanding one end of the insulation sleeve. With the help of the second drive assembly, drive the insulation sleeve to be installed on the pipe. At this time, an air film will be formed between the insulation sleeve and the pipe, reducing the friction between the insulation sleeve and the pipe. This allows the insulation sleeve to be installed on the pipe more smoothly, improving the convenience of insulation sleeve installation.

[0034] 2. The first driving component drives the driving ring to rotate, and under the action of the driving inclined surface and the abutting inclined surface, it can expand one end of the insulation sleeve more stably from the clamping hook. With this design, the center of the expanded insulation sleeve is still on the same straight line as the center of the pipe, so that the insulation sleeve can be put on the pipe more smoothly and the stability of the insulation sleeve is improved.

[0035] 3. The sliding block and sliding groove cooperate to make the fixed frame slide more stably. In addition, with the second driving component and driving wheel, the sliding seat can slide more smoothly, improving the stability of the sliding seat. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a PPR pipe outer insulation layer sleeve device according to an embodiment of this application.

[0037] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0038] Figure 3 This is a cross-sectional view of the embodiment of this application to highlight the support component.

[0039] Figure 4 This is a cross-sectional view of an embodiment of this application to highlight the clamping hook.

[0040] Figure 5 This is a flowchart of the method of use in this application.

[0041] Reference numerals: 1. Second support plate; 2. Air injection hole; 3. Clamping ring; 4. Clamping hook; 5. Rotating wheel; 6. Rotating rod; 7. Rotating seat; 8. Insertion seat; 9. First support plate; 10. Fixing frame; 11. Locking plate; 12. Snap-fit ​​block; 13. Sliding seat; 14. Abutting groove; 15. Tension spring; 16. Clamping rod; 17. Drive inclined groove; 18. Drive ring; 19. Abutting inclined groove; 20. Clamping slide rod; 21. Limiting protrusion; 22. Connecting slider; 23. First driving component; 24. Sliding groove; 25. Drive wheel; 26. Second driving component; 27. Locking bolt; 28. Adjusting groove; 29. ​​Clamping hole; 30. Clamping compression spring; 31. Reset compression spring; 32. Sliding block; 33. Rotating shaft; 34. Protective sleeve; 35. Reset spring. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1 —5 provides further details regarding this application.

[0043] This application discloses a device and installation method for sleeved insulation layer on the outside of a PPR pipe.

[0044] Reference Figure 1 and Figure 2A device and installation method for installing an outer insulation layer on a PPR pipe includes a fixing frame 10. A first support plate 9 and a second support plate 1 are respectively installed at both ends of the fixing frame 10. The first support plate 9 and the second support plate 1 are rectangular plates. A plug-in seat 8, which mates with the pipe, is fixed to the side of the first support plate 9 closest to the second support plate 1. The plug-in seat 8 is boss-shaped, and its outer diameter gradually decreases along the direction close to the second support plate 1. An air injection hole 2 is opened through the plug-in seat 8 along its axial direction. A clamping hole 29, which is rectangular, is opened through the second support plate 1. Two clamping rods 16 are slidably connected to the clamping hole 29. A clamping spring 30 is fixed to the clamping hole 29 to drive the two clamping rods 16 to move closer together. By bringing the two clamping rods 16 closer together, one end of the insulation sleeve can be sealed. A sliding seat 13 is slidably connected to the fixed frame 10, and the sliding seat 13 is slidably connected between the first support plate 9 and the second support plate 1. A clamping ring 3 is fixed on the sliding seat 13, and multiple clamping hooks 4 are installed on the clamping ring 3. The clamping hooks 4 are inserted into the insulation sleeve. A first driving component is fixed on the sliding seat 13 for driving the clamping hooks 4 to move away from the insulation sleeve, so that one end of the insulation sleeve can be expanded by the multiple clamping hooks 4. A second driving component is fixed on the sliding seat 13 for driving the sliding seat 13 to slide along the connection direction between the first support plate 9 and the second support plate 1. A support component for supporting the pipeline is fixed on the fixed frame 10, so that the pipeline can be placed more stably.

[0045] The mounting bracket 10 consists of two rotating plates hinged together. A locking plate 11 is rotatably connected to one of the rotating plates, and a snap-fit ​​groove is provided on the side wall of the locking plate 11. A snap-fit ​​block 12, which engages with the snap-fit ​​groove, is fixed on the other rotating plate. The snap-fit ​​block 12 has a T-shaped cross-section. This significantly shortens the length of the mounting bracket 10 and improves the ease of use and installation.

[0046] The first driving assembly includes a clamping slide rod 20 inserted into the clamping ring 3. The clamping slide rod 20 is a cylindrical rod that slides radially along the clamping ring 3. A clamping hook 4 is fixed to the clamping slide rod 20. A driving ring 18 is rotatably connected to the clamping ring 3, and the driving ring 18 passes through the clamping slide rod 20. The outer wall of the driving ring 18 has multiple driving grooves 17. The clamping slide rod 20 has multiple abutment grooves 19 that abut against the driving grooves 17. A first driving member 23, which is a driving cylinder, is rotatably connected to the sliding seat 13 to drive the driving ring 18 to rotate. Rotating the driving ring 18 causes the clamping hook 4 to move away from the insulation sleeve. A return spring 31 is sleeved on the clamping slide rod 20 to drive the clamping hook 4 away from the clamping ring 3. This design allows the clamping hook 4 to expand one end of the insulation sleeve more conveniently and to automatically return to its original position, improving the convenience of using multiple clamping hooks 4. Multiple limiting protrusions 21 are provided on the side of the clamping hook 4 near the clamping ring 3. The limiting protrusions 21 increase the friction on the surface of the clamping hook 4, so that the clamping hook 4 can clamp the insulation sleeve more stably.

[0047] The clamping ring 3 has an integrally formed connecting slider 22 on both sides. The sliding seat 13 has an adjustment groove 28 on both sides. The length direction of the adjustment groove 28 is opened towards the fixing frame 10. A locking bolt 27 is inserted into the adjustment groove 28. The locking bolt 27 is threadedly connected to the connecting slider 22, so that the position of the clamping hook 4 can be adjusted more conveniently, and the convenience of fixing the insulation sleeve with the clamping hook 4 can be improved.

[0048] The fixed frame 10 has a sliding groove 24, and the sliding seat 13 has a sliding block 32 that slides and engages with the sliding groove 24. The second drive assembly includes a mounting plate fixed to one side of the sliding block 32, and a second drive component 26 fixed on the mounting plate. The second drive component 26 is a drive motor, and a drive wheel 25 is rotatably connected to the drive motor. The drive wheel 25 abuts against one side wall of the sliding groove 24, thereby driving the sliding seat 13 to move.

[0049] The support assembly includes a rotating seat 7 fixed to a fixed frame 10, a rotating rod 6 rotatably connected to the rotating seat 7, and a rotating shaft 33 fixed to the rotating seat 7. The rotating shaft 33 passes through the rotating rod 6 and is connected to the rotating shaft 33. A return spring 35 is sleeved on the rotating shaft 33 to drive the rotating rod 6 to return to its original position. A sliding seat 13 drives the rotating rod 6 to rotate and allows the sliding seat 13 to move smoothly along the fixed frame 10. This satisfies both the support function of the pipeline and allows the sliding seat 13 to pass smoothly, improving the stability of the pipeline fixation. A rotating wheel 5 is rotatably connected to the rotating rod 6, and a protective sleeve 34 is sleeved on the rotating wheel 5. The protective sleeve 34 is made of rubber material to reduce damage to the pipeline surface and improve the stability of the installation structure.

[0050] The fixed frame 10 is provided with a pressing groove 14, which is opened along the sliding direction of the sliding seat 13. The second support plate 1 is provided with a pressing slider that slides and cooperates with the pressing groove 14 on the side near the fixed frame 10. A tension spring 15 is fixed in the pressing groove 14 to pull the first support plate 9 to move closer to the second support plate 1. The tension spring 15 can make the second support plate 1 press against the pipe, so that the pipe can be better inserted into the plug seat 8 and improve the stability of the pipe.

[0051] A method for installing an outer insulation layer on a PPR pipe includes the following steps:

[0052] S1, Cutting the pipe: The staff cuts the pipe to the appropriate length;

[0053] S2, pipe installation: place the pipe on the support assembly and insert one end of the pipe into the connector 8. Adjust the position of the pipe according to the inner and outer diameters of the pipe. The rotating rod 6 can better support pipes of different sizes. The second support plate 1 is used to press the pipe against the connector 8.

[0054] S3, Insulation sleeve is fixed. The insulation sleeve is passed between the two clamping rods 16 and the clamping spring is used to seal one end of the pipe. Then the insulation sleeve is moved closer to the clamping hook 4 and the clamping hook 4 is inserted into the insulation sleeve.

[0055] S4, expand the insulation sleeve. The first driving component 23 drives the driving ring 18, which in turn drives the driving slide rod to move the clamping hook 4 away from the insulation sleeve, so that one end of the insulation sleeve opens.

[0056] S5, the insulation sleeve is installed, the second drive component drives the insulation sleeve to move closer to the pipe, and at the same time, gas is injected into the pipe through the air injection hole 2. The gas passes through the insulation sleeve and is discharged through the gap between the insulation sleeve and the pipe, and forms an air film in the gap to reduce resistance.

[0057] S6, disassemble the pipe. When the sliding seat 13 approaches the first support plate 9, the clamping hook 4 is reset under the action of the first drive component. The staff takes out the pipe with the insulation sleeve, and completes the work of installing the insulation sleeve on the pipe.

[0058] The advantage of this embodiment is that, with this design, when the insulation sleeve moves closer to the pipe, the gas injected into the pipe is discharged in the gap between the insulation sleeve and the pipe, thereby greatly reducing the friction between the insulation sleeve and the pipe and improving the ease of installation of the insulation sleeve.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for installing an outer insulation layer on a PPR pipe, characterized in that: The device includes a fixed frame (10), with a first support plate (9) and a second support plate (1) at each end. A plug-in seat (8) for connecting to a pipe is provided on the side of the first support plate (9) near the second support plate (1). An air injection hole (2) is provided in the plug-in seat (8). A clamping hole (29) is provided through the second support plate (1). Two clamping rods (16) are slidably connected to the clamping hole (29). A clamping spring (30) is provided on the clamping hole (29) to drive the two clamping rods (16) closer together. A sliding seat (13) is slidably connected to the fixed frame (10). The sliding seat (13) is slidably disposed between the first support plate (9) and the second support plate (1). The sliding seat (13) is provided with a clamping ring (3) and a plurality of clamping hooks (4) are provided on the clamping ring (3). The clamping hooks (4) are inserted into the insulation sleeve. The sliding seat (13) is provided with a first driving component for driving the clamping hooks (4) to move away from the insulation sleeve. The sliding seat (13) is provided with a second driving component for driving the sliding seat (13) to slide along the line connecting the first support plate (9) and the second support plate (1). The fixing frame (10) is provided with a support component for supporting the pipe.

2. The device for installing an outer insulation layer on a PPR pipe according to claim 1, characterized in that: The first driving assembly includes a clamping slide rod (20) inserted into a clamping ring (3). The clamping slide rod (20) is radially slidable along the clamping ring (3). A clamping hook (4) is fixed to the clamping slide rod (20). A driving ring (18) is rotatably connected to the clamping ring (3). The driving ring (18) passes through the clamping slide rod (20). A plurality of driving grooves (17) are formed on the outer wall of the driving ring (18). The upper part is provided with a plurality of abutting grooves (19) that abut against the driving groove (17). The sliding seat (13) is rotatably provided with a first driving member (23) for driving the driving ring (18) to rotate. The driving ring (18) is rotated and the clamping hook (4) is driven to move away from the heat preservation sleeve. The clamping slide rod (20) is provided with a reset spring (31). The reset spring (31) is used to drive the clamping hook (4) away from the clamping ring (3).

3. The device for installing an outer insulation layer on a PPR pipe according to claim 2, characterized in that: The clamping ring (3) is provided with connecting sliders (22) on both sides, and the sliding seat (13) is provided with adjusting grooves (28) on both sides. The adjusting grooves (28) are opened along the length direction close to the fixing frame (10). A locking bolt (27) is inserted into the adjusting groove (28), and the locking bolt (27) is threadedly connected to the connecting slider (22).

4. The device for installing an outer insulation layer on a PPR pipe according to claim 1, characterized in that: The fixed frame (10) is provided with a sliding groove (24), and the sliding seat (13) is provided with a sliding block (32) that slides and engages with the sliding groove (24); the second drive assembly includes a mounting plate fixed to one side of the sliding block (32), and a second drive member (26) is provided on the mounting plate. A drive wheel (25) is rotatably connected to the second drive member (26), and the drive wheel (25) abuts against one side wall of the sliding groove (24).

5. The device for installing an outer insulation layer on a PPR pipe according to claim 1, characterized in that: The support assembly includes a rotating seat (7) disposed on the fixed frame (10), a rotating rod (6) rotatably connected to the rotating seat (7), a rotating shaft (33) disposed on the rotating seat (7), the rotating shaft (33) passing through the rotating rod (6), a return spring (35) for driving the rotating shaft (33) to reset is sleeved on the rotating shaft (33), the sliding seat (13) drives the rotating rod (6) to rotate and makes the sliding seat (13) slide smoothly along the fixed frame (10), and a rotating wheel (5) rotatably connected to the rotating rod (6).

6. The device for installing an outer insulation layer on a PPR pipe according to claim 5, characterized in that: A protective sleeve (34) is fitted onto the rotating wheel (5).

7. The device for installing an outer insulation layer on a PPR pipe according to claim 1, characterized in that: The fixed frame (10) is provided with a pressing groove (14), which is opened along the sliding direction of the sliding seat (13). The second support plate (1) is provided with a pressing slider that slides and cooperates with the pressing groove (14) on the side near the fixed frame (10). A tension spring (15) is provided in the pressing groove (14) for pulling the first support plate (9) to slide closer to the second support plate (1).

8. The device for installing an outer insulation layer on a PPR pipe according to claim 1, characterized in that: The outer diameter of the connector (8) gradually decreases in the direction close to the second support plate (1).

9. A device for installing an outer insulation layer on a PPR pipe according to claim 1, characterized in that: The fixing frame (10) consists of two rotating plates that are hinged to each other. A locking plate (11) is rotatably connected to one of the rotating plates. A snap-fit ​​groove is provided on the side of the locking plate (11). A snap-fit ​​block (12) is provided on the other rotating plate to engage with the snap-fit ​​groove.

10. A method for installing an outer insulation layer on a PPR pipe, characterized in that: The PPR pipe outer insulation layer sleeve device according to any one of claims 1-9 includes the following steps: S1, Cutting the pipe: The staff cuts the pipe to the appropriate length; S2, pipe installation: place the pipe on the support assembly and insert one end of the pipe into the plug seat (8); S3, fix the insulation sleeve, pass the insulation sleeve between the two clamping rods (16), and seal one end of the pipe with the clamping spring, then move the insulation sleeve closer to the clamping hook (4), and insert the clamping hook (4) into the insulation sleeve. S4, expand the insulation sleeve, drive multiple clamping hooks (4) to move away from the insulation sleeve through the first drive component, so that one end of the insulation sleeve opens; S5, the insulation sleeve is installed, the second drive component drives the insulation sleeve to move closer to the pipe, and at the same time, gas is injected into the pipe through the air injection hole (2). The gas passes through the insulation sleeve and is discharged through the gap between the insulation sleeve and the pipe, and forms an air film in the gap to reduce resistance. S6, disassemble the pipe. When the sliding seat (13) approaches the first support plate (9), the clamping hook (4) is reset under the action of the first drive component. The staff takes out the pipe with the insulation sleeve and completes the work of installing the insulation sleeve on the pipe.

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