Maintenance-free directly-buried sleeve compensator prefabricated heat preservation device

Abstract

The utility model discloses a maintenance-free direct burial sleeve compensator prefabrication heat preservation device which comprises a compensator body, a movable connecting pipe is arranged at one end of the compensator body, a fixed connecting pipe is fixedly connected to the other end of the compensator body, a protective sleeve is connected to the outer contour of the compensator body in a sleeved mode, and the outer contour of the compensator body is fixedly connected with the fixed connecting pipe. The outer contour of the compensator body is sleeved with a movable sleeve, and the end, close to the protective sleeve, of the movable sleeve is fixedly connected with a contraction band. According to the utility model, through the cooperation of the protective sleeve, the fixed sleeve, the contraction band, the movable sleeve, the polyurethane thermal insulation layer, the waterproof layer and other structures, the compensator body can be subjected to waterproof and thermal insulation treatment during use, so that the compensator body is prevented from being corroded due to long-term burying underground; and the practicability of the equipment is improved, and the service life of the equipment is also prolonged.

Description

Technical Field

[0001] This utility model relates to the field of sleeve compensator technology, and in particular to a maintenance-free direct-buried sleeve compensator prefabricated insulation device. Background Technology

[0002] A sleeve compensator is a device used to compensate for axial displacement in pipelines caused by thermal expansion and contraction. It is mainly used for absorbing and compensating for thermal expansion displacement after straight pipelines are laid. It is typically installed in pipelines transporting non-corrosive unidirectional or multidirectional fluids and is widely used in industries such as urban heating, metallurgy, mining, power generation, petrochemicals, and construction.

[0003] In the existing technology, sleeve compensators are usually buried underground for use. The soil is relatively moist, and the moisture in the soil can easily damage the surface of the sleeve compensator, causing it to leak, affecting the efficiency of the equipment, and also reducing its service life. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a maintenance-free direct-buried sleeve compensator prefabricated insulation device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a maintenance-free direct-buried sleeve compensator prefabricated insulation device, comprising a compensator body, a movable connecting pipe provided at one end of the compensator body, a fixed connecting pipe fixedly connected at the other end of the compensator body, a protective sleeve sleeved on the outer contour of the compensator body, a movable sleeve sleeved on the outer contour of the compensator body, a shrinkage band fixedly connected at one end of the movable sleeve near the protective sleeve, the inner wall of the protective sleeve fixedly connected to one end of the shrinkage band near the outer contour of the protective sleeve, a fixed sleeve sleeved on the outer contour of the fixed connecting pipe, and the other end of the protective sleeve fixedly connected to the fixed sleeve;

[0006] A polyurethane insulation layer is provided at the gap between the movable connecting pipe and the movable sleeve and at the gap between the fixed connecting pipe and the fixed sleeve. A waterproof layer is provided at the gap between the protective sleeve and the compensator body. A sealing element is provided on the outer contour of both the fixed sleeve and the movable sleeve.

[0007] As a further description of the above technical solution:

[0008] A fixing ring is provided at one end of the shrink band near the movable sleeve and at one end of the outer contour of the shrink band near the inner wall of the protective sleeve. A threaded groove is provided at the end of the fixing ring away from the outer contour of the shrink band. An installation groove for the fixing ring to be inserted is provided at one end of the movable sleeve near the shrink band and at the inner wall of the protective sleeve. An internal thread that matches the threaded groove is provided in the installation groove. A second sealing ring is arranged in an array at one end of the fixing ring near the outer contour of the shrink band. A placement groove for the second sealing ring to be engaged is provided in the installation groove.

[0009] As a further description of the above technical solution:

[0010] The sealing element includes threaded grooves respectively formed on the outer contours of the fixed sleeve and the movable sleeve. A filling groove is formed through the bottom of the threaded groove. A bolt is threadedly connected to the inner wall of the threaded groove, and a sealing block is fixedly connected to the bottom of the bolt.

[0011] As a further description of the above technical solution:

[0012] A sealing block is fixedly connected to the bottom of the bolt. A series of sealing rings are arranged on the outer contour of the sealing block. A sealing groove is provided on the inner wall of the injection groove for the sealing rings to engage.

[0013] As a further description of the above technical solution:

[0014] The waterproof layer includes a glass surface insulation layer disposed on the outer contour of the protective sleeve, a polyethylene waterproof layer disposed on the outer contour of the glass surface insulation layer, and an acrylic acetate emulsion waterproof coating coated on the outer contour of the polyethylene waterproof layer.

[0015] As a further description of the above technical solution:

[0016] A connecting block is fixedly connected to the top of the bolt, and a cross groove is formed on the top of the connecting block.

[0017] This utility model has the following beneficial effects:

[0018] Compared with existing technologies, this maintenance-free direct-buried sleeve compensator prefabricated insulation device, through the combination of protective sleeves, fixed sleeves, shrink bands, movable sleeves, polyurethane insulation layers and waterproof layers, can waterproof and insulate the compensator body during use. This avoids the problem of corrosion caused by long-term underground burial, which reduces the insulation performance of the compensator body, improves the practicality of the equipment, and increases its service life. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall cross-sectional structure of a prefabricated insulation device for a maintenance-free direct-buried sleeve compensator proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the overall main structure of a maintenance-free direct-buried sleeve compensator prefabricated insulation device proposed in this utility model;

[0021] Figure 3 This utility model proposes a maintenance-free prefabricated insulation device for a direct-buried sleeve compensator. Figure 1 A magnified structural diagram at point A;

[0022] Figure 4 This is a schematic diagram of the internal structure of the waterproof layer of a prefabricated insulation device for a maintenance-free direct-buried sleeve compensator proposed in this utility model.

[0023] Legend:

[0024] 1. Compensator body; 2. Movable connecting pipe; 3. Fixed connecting pipe; 4. Protective sleeve; 5. Fixed sleeve; 6. Shrink band; 7. Movable sleeve; 8. Polyurethane insulation layer; 9. Waterproof layer; 10. Threaded groove; 11. Injection groove; 12. Bolt; 13. Sealing block; 14. Sealing ring one; 15. Sealing groove; 16. Glass surface insulation layer; 17. Polyethylene waterproof layer; 18. Acrylic acetate emulsion waterproof coating; 61. Fixing ring; 62. Sealing ring two. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 1-4 The present invention provides a maintenance-free direct-buried sleeve compensator prefabricated insulation device, including a compensator body 1, a movable connecting pipe 2 at one end of the compensator body 1, a fixed connecting pipe 3 at the other end of the compensator body 1, a protective sleeve 4 on the outer contour of the compensator body 1, a movable sleeve 7 on the outer contour of the compensator body 1, a shrink band 6 fixedly connected to the end of the movable sleeve 7 near the protective sleeve 4, the inner wall of the protective sleeve 4 being fixedly connected to the end of the shrink band 6 near the outer contour of the protective sleeve 4, a fixed sleeve 5 on the outer contour of the fixed connecting pipe 3, and the other end of the protective sleeve 4 being fixedly connected to the fixed sleeve 5.

[0027] A polyurethane insulation layer 8 is provided at the gap between the movable connecting pipe 2 and the movable sleeve 7 and the gap between the fixed connecting pipe 3 and the fixed sleeve 5. A waterproof layer 9 is provided at the gap between the protective sleeve 4 and the compensator body 1. Sealing elements are provided on the outer contours of the fixed sleeve 5 and the movable sleeve 7.

[0028] First, the waterproof layer 9 is installed on the outer contour of the protective sleeve 4. Then, the protective sleeve 4 and the fixed sleeve 5 are fitted onto the outer contours of the compensator body 1 and the fixed connecting pipe 3. Next, the shrink band 6 is installed on the inner wall of the protective sleeve 4. Then, the movable sleeve 7 is fixedly connected to the shrink band 6. Then, the polyurethane foam is injected into the movable connecting pipe 2 and the movable sleeve 7, and the fixed connecting pipe 3 and the fixed sleeve 5 through the sealing. This forms the polyurethane insulation layer 8. Then, through the cooperation of the protective sleeve 4, the fixed sleeve 5, the shrink band 6, the movable sleeve 7, the polyurethane insulation layer 8, and the waterproof layer 9, the compensator body 1 can be waterproofed and insulated during use, improving the practicality of the equipment.

[0029] A retaining ring 61 is provided at one end of the shrink band 6 near the movable sleeve 7 and at one end of the outer contour of the shrink band 6 near the inner wall of the protective sleeve 4. A threaded groove is provided at the end of the retaining ring 61 away from the outer contour of the shrink band 6. An installation groove for inserting the retaining ring 61 is provided at one end of the movable sleeve 7 near the shrink band 6 and at the inner wall of the protective sleeve 4. An internal thread that matches the threaded groove is provided in the installation groove. A sealing ring 62 is arranged in an array at one end of the retaining ring 61 near the outer contour of the shrink band 6. A placement groove for snapping the sealing ring 62 is provided in the installation groove.

[0030] By inserting the retaining ring 61 on the shrink tape 6 into the mounting groove on the inner wall of the protective sleeve 4, and then rotating the shrink tape 6 to rotate the retaining ring 61, the threaded groove on the retaining ring 61 is screwed into the internal thread on the inner wall of the mounting groove. When the shrink tape 6 and the retaining ring 61 can no longer rotate, the sealing ring 62 on the retaining ring 61 is engaged in the placement groove in the mounting groove. Multiple sealing rings 62 form a labyrinth seal, increasing the sealing effect. After the shrink tape 6 and the protective sleeve 4 are installed, the operator then fits the movable sleeve 7 onto the outer contour of the movable connecting pipe 2, and then holds the shrink tape 6 and rotates the polyurethane insulation layer 8, so that... The threaded groove on the polyurethane insulation layer 8 is screwed into the threaded groove on the fixing ring 61. When the polyurethane insulation layer 8 can no longer rotate, the placement groove in the installation groove on the polyurethane insulation layer 8 engages with the sealing ring 62 on the fixing ring 61. At this time, the connection and fixation of the shrink band 6 and the movable sleeve 7 to the protective sleeve 4 can be completed. When the movable connecting pipe 2 extends or retracts, it drives the polyurethane insulation layer 8 to move, which in turn drives the shrink band 6 to move. Thus, through the cooperation of the protective sleeve 4, the shrink band 6, and the movable sleeve 7, the compensator body 1, the movable connecting pipe 2, and the fixed connecting pipe 3 can be initially insulated and waterproofed.

[0031] The sealing element includes threaded grooves 10 respectively formed on the outer contours of the fixed sleeve 5 and the movable sleeve 7. A filling groove 11 is formed through the bottom of the threaded groove 10. A bolt 12 is threadedly connected to the inner wall of the threaded groove 10. A sealing block 13 is fixedly connected to the bottom of the bolt 12. A sealing ring 14 is arranged in an array on the outer contour of the sealing block 13. A sealing groove 15 is formed on the inner wall of the filling groove 11 for the sealing ring 14 to engage. A connecting block is fixedly connected to the top of the bolt 12. A cross groove is formed on the top of the connecting block.

[0032] By inserting a screwdriver into the cross groove on the connecting block and rotating the bolt 12, the bolt 12, sealing block 13, and sealing ring 14 are all removed from the screw groove 10. Then, polyurethane foam is injected into the gaps between the movable connecting pipe 2 and movable sleeve 7 and the fixed connecting pipe 3 and fixed sleeve 5 through the screw groove 10 and the injection groove 11, forming a polyurethane insulation layer 8. The polyurethane insulation layer 8 is used to increase the heat preservation effect of the equipment during use. Then, the bolt 12 and sealing block 13 are sent back into the screw groove 10 and the injection groove 11, so that the bolt 12 is screwed into the screw groove 10. Then, the sealing ring 14 on the sealing block 13 is engaged with the sealing groove 15 opened in the inner wall of the injection groove 11. Then, multiple sealing rings 14 are used to form a labyrinth seal, further increasing its sealing effect.

[0033] The waterproof layer 9 includes a glass surface insulation layer 16 disposed on the outer contour of the protective sleeve 4, a polyethylene waterproof layer 17 disposed on the outer contour of the glass surface insulation layer 16, and an acrylic acetate emulsion waterproof coating 18 coated on the outer contour of the polyethylene waterproof layer 17.

[0034] The compensator body 1 is insulated by a glass insulation layer 16, and then waterproofed by a polyethylene waterproof layer 17 and an acrylic acetate emulsion waterproof coating 18, thereby increasing the waterproof sealing effect during equipment use.

[0035] Working principle: First, the waterproof layer 9 is installed on the outer contour of the protective sleeve 4. Then, the protective sleeve 4 and the fixing sleeve 5 are fitted onto the outer contours of the compensator body 1 and the fixing connecting pipe 3. The fixing ring 61 on the shrink band 6 is inserted into the installation groove opened in the inner wall of the protective sleeve 4. Then, the shrink band 6 is rotated to drive the fixing ring 61 to rotate, so that the threaded groove on the fixing ring 61 is screwed into the internal thread opened in the inner wall of the installation groove. When the shrink band 6 and the fixing ring 61 can no longer rotate, the sealing rubber ring 62 on the fixing ring 61 is engaged in the placement groove in the installation groove. The multiple sealing rubber rings 62 form a labyrinth seal to increase its sealing effect. After the shrink band 6 and the protective sleeve 4 are installed, the operator then fits the movable sleeve 7 onto the outer contour of the movable connecting pipe 2. Then, grasp the shrink band 6 and rotate the polyurethane insulation layer 8 so that the thread in the mounting groove on the polyurethane insulation layer 8 is screwed into the threaded groove on the fixing ring 61. When the polyurethane insulation layer 8 can no longer rotate, the placement groove in the mounting groove on the polyurethane insulation layer 8 is engaged with the sealing ring 62 on the fixing ring 61. At this time, the connection and fixation of the shrink band 6 and the movable sleeve 7 to the protective sleeve 4 can be completed. When the movable connecting pipe 2 extends or retracts, the movable connecting pipe 2 drives the polyurethane insulation layer 8 to move, which in turn drives the shrink band 6 to move. Thus, through the cooperation of the protective sleeve 4, the shrink band 6 and the movable sleeve 7, the compensator body 1, the movable connecting pipe 2 and the fixed connecting pipe 3 can be initially insulated and waterproofed. At the same time, the waterproof layer 9 is used to further enhance its waterproof and insulated effect.

[0036] Then, by inserting a screwdriver into the cross groove on the connecting block and rotating the bolt 12, the bolt 12, sealing block 13, and sealing ring 14 are all removed from the screw groove 10. Then, polyurethane foam is injected into the gap between the movable connecting pipe 2 and movable sleeve 7 and the fixed connecting pipe 3 and fixed sleeve 5 through the screw groove 10 and the injection groove 11, forming a polyurethane insulation layer 8. The polyurethane insulation layer 8 is used to increase the heat preservation effect of the equipment during use.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A prefabricated thermal insulation device for a maintenance-free, directly buried sleeve compensator, comprising a compensator body (1), characterized in that: One end of the compensator body (1) is provided with a movable connecting pipe (2), the other end of the compensator body (1) is fixedly connected with a fixed connecting pipe (3), the outer contour of the compensator body (1) is sleeved with a protective sleeve (4), the outer contour of the compensator body (1) is sleeved with a movable sleeve (7), one end of the movable sleeve (7) close to the protective sleeve (4) is fixedly connected with a shrinkable belt (6), the inner wall of the protective sleeve (4) is fixedly connected with the outer contour of the shrinkable belt (6) close to the protective sleeve (4), the outer contour of the fixed connecting pipe (3) is sleeved with a fixed sleeve (5), the other end of the protective sleeve (4) is fixedly connected with the fixed sleeve (5). The gap between the movable connecting pipe (2) and the movable sleeve (7) and the gap between the fixed connecting pipe (3) and the fixed sleeve (5) are provided with a polyurethane heat preservation layer (8), the gap between the protective sleeve (4) and the compensator body (1) is provided with a waterproof layer (9), and the outer contour of the fixed sleeve (5) and the movable sleeve (7) is provided with a sealing element.

2. A prefabricated thermal insulation device for a maintenance-free, directly buried sleeve compensator according to claim 1, characterized in that: One end of the shrinkable belt (6) close to the movable sleeve (7) and the other end of the shrinkable belt (6) close to the inner wall of the protective sleeve (4) are provided with a fixed ring (61), a threaded groove is formed in the outer end of the fixed ring (61) away from the shrinkable belt (6), an installation groove is formed in the inner wall of the movable sleeve (7) close to the shrinkable belt (6) and the protective sleeve (4), and an inner thread matched with the threaded groove is arranged in the installation groove.

3. A prefabricated thermal insulation device for a maintenance-free, directly buried sleeve compensator according to claim 1, characterized in that: The sealing element comprises screw grooves (10) formed in the outer contour of the fixed sleeve (5) and the movable sleeve (7), respectively, a pouring groove (11) is formed in the bottom of the screw groove (10), a bolt (12) is threadedly connected to the inner wall of the screw groove (10), and a sealing block (13) is fixedly connected to the bottom of the bolt (12).

4. A prefabricated thermal insulation device for a maintenance-free, directly buried sleeve compensator according to claim 3, characterized in that: The bottom of the bolt (12) is fixedly connected with a sealing block (13), and the outer contour of the sealing block (13) is arrayed with a sleeved sealing rubber ring I (14).

5. A prefabricated thermal insulation device for a maintenance-free, directly buried sleeve compensator according to claim 1, characterized in that: The waterproof layer (9) comprises a glass surface heat preservation layer (16) arranged on the outer contour of the protective sleeve (4), a polyethylene waterproof layer (17) arranged on the outer contour of the glass surface heat preservation layer (16), and a propylene acid acetic emulsion waterproof coating (18) coated on the outer contour of the polyethylene waterproof layer (17).

6. A prefabricated thermal insulation device for a maintenance-free, directly buried sleeve compensator according to claim 3, characterized in that: The top of the bolt (12) is fixedly connected with a connecting block, and a cross groove is formed in the top of the connecting block.

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