Waterproof sleeve structure suitable for direct-buried heat supply pipeline in high water level soft soil foundation area

Abstract

The application discloses a waterproof sleeve structure suitable for direct-buried heat supply pipelines in high-water-level soft-soil foundation areas, which comprises a sleeve and a heat preservation pipe, first displacement structures and second displacement structures are arranged between the sleeve and the heat preservation pipe, waterproof structures are arranged between the first displacement structures and the second displacement structures, first polyethylene ring blocks are fixedly connected to the inner circumferential walls of the sleeve, polyethylene outer protective pipes are arranged outside the heat preservation pipe, the waterproof structures comprise second polyethylene ring blocks abutting against the first polyethylene ring blocks, third polyethylene ring blocks abutting against the polyethylene outer protective pipes, and waterproof cloths sealingly connected to the second polyethylene ring blocks and the third polyethylene ring blocks at two ends respectively, first resistance wires are arranged in the second polyethylene ring blocks, second resistance wires are arranged in the third polyethylene ring blocks, and wires electrically connected with the first resistance wires and the second resistance wires are further arranged.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline construction, and in particular to a waterproof casing structure suitable for directly buried heating pipelines in high water level soft soil areas. Background Art

[0002] The direct buried heat pipe network in urban heating pipe network generally passes through the wall of underground well chamber, etc., and pipe wall sleeves are set at the wall penetration. The existing wall sleeve practices are shown in Figure 1 .

[0003] The main drawbacks are that direct-buried heating pipes are subject to axial and lateral thermal displacement, especially in high-water-level soft soil areas. They also face the problem of floating and sinking. Therefore, the displacement direction of direct-buried heating pipes is universal and the displacement is large. The existing wall-penetrating sleeves cannot guarantee the waterproofing of direct-buried heating pipes under universal thermal displacement. Water leaks or seepage at the wall-penetrating sleeves in well chambers in high-water-level areas can lead to large amounts of water accumulation in the well chambers, severe corrosion of valves and other equipment, and impacting the safe operation of the heating system. Furthermore, the existing wall-penetrating sleeves limit the thermal displacement of the heating pipes, causing the insulation layer of the heating pipes to be squeezed and deformed, damaging the outer sheath of the pipes, and causing local buckling of the heating pipes, which can lead to pipe damage and leakage. Summary of the Invention

[0004] 1. Technical problem to be solved by the invention

[0005] The purpose of the present invention is to solve the technical problems existing in the prior art and provide a waterproof casing structure suitable for directly buried heating pipes in high water level soft soil areas. It can not only adapt to the universal thermal displacement of the pipeline, but also avoid water leakage or seepage at the wall casing of the well chamber in the high water level area.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the technical solution provided by the present invention is:

[0008] A waterproof casing structure suitable for directly buried heating pipelines in high water level soft soil areas includes a casing and an insulation pipe, a first displacement structure and a second displacement structure are provided between the casing and the insulation pipe, a waterproof structure is provided between the first displacement structure and the second displacement structure, a first polyethylene circular block is fixedly connected to the inner circumferential wall of the casing, a polyethylene outer protective pipe is provided on the outside of the insulation pipe, the waterproof structure includes a second polyethylene circular block abutting against the first polyethylene circular block, a third polyethylene circular block abutting against the polyethylene outer protective pipe, and a waterproof cloth with two ends respectively sealedly connected to the second polyethylene circular block and the third polyethylene circular block, the second polyethylene circular block has a first resistance wire built in, the third polyethylene circular block has a second resistance wire built in, and also includes a wire conductively connected to the first resistance wire and the second resistance wire, the first resistance wire is energized to fuse the first polyethylene circular block and the second polyethylene ring block, and the second resistance wire fuses the third polyethylene ring block and the polyethylene outer protective pipe.

[0009] Optionally, the sleeve is provided with an outwardly protruding fixing block, and the fixing block is provided with a fixing groove for at least partially embedding the first polyethylene circular ring block.

[0010] Optionally, the first polyethylene circular ring block is provided with a connection groove for the second polyethylene circular ring block to be at least partially embedded.

[0011] Optionally, the first displacement structure is arranged at the back water end of the casing, and the first displacement structure includes a pipe clamp fixedly connected to the polyethylene outer protective tube, and a plurality of elastic telescopic structures fixedly connected to the pipe clamp, the plurality of elastic telescopic structures are distributed along the circumferential direction of the pipe clamp, and the elastic telescopic structures are arranged along the radial direction of the polyethylene outer protective tube.

[0012] Optionally, the elastic telescopic structure includes a limiting protective sleeve fixedly connected to the pipe clamp, a support spring arranged in the limiting protective sleeve, and a pulley fixedly connected to the support spring, the support spring is arranged along the radial direction of the polyethylene outer protective tube, and the pulley is arranged on the support spring near one end of the sleeve and extends from the limiting protective sleeve to abut the sleeve.

[0013] Optionally, the back-to-water end of the sleeve is provided with a blocking structure for limiting the pulley from sliding out of the back-to-water end of the sleeve.

[0014] Optionally, the blocking structure comprises a baffle ring fixedly connected to the backwater end of the casing, and the inner ring of the baffle ring is located on the sliding path of the pulley.

[0015] Optionally, the second displacement structure comprises at least two discs with different diameters, the disc with larger diameter is internally provided with a movable groove along the circumference thereof, the disc with smaller diameter is movably inserted into the movable groove, the disc with larger diameter is movably connected to the inner circumferential wall of the sleeve, and the disc with smaller diameter is internally connected with a stop ring movably abutting against the polyethylene outer protective sleeve.

[0016] Optionally, the side of the stop ring abutting against the polyethylene outer protective sleeve is provided with an open groove, and the open groove is filled with asphalt and flexible material.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects:

[0019] The waterproof sleeve structure of the present application is suitable for the straight-buried heat supply pipeline in the high water level soft soil foundation area, can not only adapt to the universal heat displacement of the pipeline, but also avoid the water leakage or seepage phenomenon at the wall-penetrating sleeve of the well chamber in the high water level area, and the waterproof structure is installed by the resistance wire heating and fusion method, which can not only ensure the sealing effect after installation, but also reduce the installation difficulty of the sealing structure, because the inner diameter of the sleeve is not too large, it is not convenient for manual installation and fixation of the traditional sealing structure in the case of setting the heat preservation pipe inside the sleeve, and the sealing effect is difficult to guarantee in the case of no vision, and the waterproof cloth can adapt to the universal heat displacement of the heat preservation pipe and prevent the underground water from entering the well chamber. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure diagram of the existing waterproof sleeve structure of the heat supply pipeline is provided as the background technology of the present application;

[0021] Figure 2 The longitudinal section diagram of the waterproof sleeve structure of the heat supply pipeline suitable for the straight-buried heat supply pipeline in the high water level soft soil foundation area is provided as the embodiment of the present application;

[0022] Figure 3 The transverse section diagram of the waterproof sleeve structure of the heat supply pipeline suitable for the straight-buried heat supply pipeline in the high water level soft soil foundation area is provided as the embodiment of the present application;

[0023] Figure 4 The section diagram of the waterproof structure in the waterproof sleeve structure of the heat supply pipeline suitable for the straight-buried heat supply pipeline in the high water level soft soil foundation area is provided as the embodiment of the present application;

[0024] Figure 5 The section diagram of the second displacement structure in the waterproof sleeve structure of the heat supply pipeline suitable for the straight-buried heat supply pipeline in the high water level soft soil foundation area is provided as the embodiment of the present application;

[0025] 1. Sleeve; 2. Insulation pipe; 31. Pipe clamp; 32. Limiting protective sleeve; 33. Support spring; 34. Pulley; 41. Disc; 41a. Movable groove; 42. Retaining ring; 51. Second polyethylene ring block; 52. Third polyethylene ring block; 53. Waterproof cloth; 54. First resistance wire; 55. Second resistance wire; 56. Conductor; 6. First polyethylene ring block; 7. Polyethylene outer protective tube; 8. Fixing block; 9. Baffle ring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0027] It should be noted that when an element is referred to as being "fixed on", "set on", "fixed on" or "installed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. Furthermore, when an element is considered to be "fixedly connected" to another element, the two may be fixed in a detachable manner or in a non-detachable manner, such as socketing, snap-fitting, integrally molded fixing, welding, etc., which can be achieved in the prior art and will not be repeated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] The “first” and “second” involved in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0030] Combined with attachment Figure 2-5, a waterproof casing structure suitable for directly buried heating pipes in high water level soft soil areas of this embodiment, including a casing 1 and an insulation pipe 2, the casing 1 is sleeved on the outside of the insulation pipe 2, the inner diameter of the casing 1 is larger than the outer diameter of the insulation pipe 2, the insulation pipe 2 has a certain displacement space in the casing 1, a first displacement structure and a second displacement structure are provided between the casing 1 and the insulation pipe 2, the first displacement structure and the second displacement structure are respectively provided at both ends of the casing 1 to adapt to the universal thermal displacement of the insulation pipe 2 and provide support for the insulation pipe 2, the first displacement structure and the second displacement structure are respectively provided at both ends of the casing 1 to adapt to the universal thermal displacement of the insulation pipe 2 and provide support for the insulation pipe 2, A waterproof structure is provided between the movable structures, and the waterproof structure is provided in the middle of the sleeve 1. A first polyethylene ring block 6 is fixedly connected to the inner circumferential wall of the sleeve 1. The outer circumferential wall of the first polyethylene ring block 6 is sealed with the inner circumferential wall of the sleeve 1. A polyethylene outer protective tube 7 is provided on the outside of the insulation pipe 2. The waterproof structure includes a second polyethylene ring block 51 abutting against the first polyethylene ring block 6, a third polyethylene ring block 52 abutting against the polyethylene outer protective tube 7, and a waterproof cloth with both ends sealedly connected to the second polyethylene ring block 51 and the third polyethylene ring block 52. 53, the waterproof cloth 53 is a waterproof canvas, the first polyethylene ring block 6, the second polyethylene ring block 51 and the third polyethylene ring block 52 are all arranged along the circumferential direction of the casing 1 and the insulation pipe 2, the second polyethylene ring block 51 has a built-in first resistance wire 54, the first resistance wire 54 is arranged near the connection position of the first polyethylene ring block 6 and the second polyethylene ring block 51, the third polyethylene ring block 52 has a built-in second resistance wire 55, the second resistance wire 55 is arranged near the connection position of the third polyethylene ring block 52 and the polyethylene outer protective tube 7, and also includes The first resistance wire 54 and the second resistance wire 55 are conductively connected by a wire 56, and the length of the wire 56 is designed so that the end can extend from the end of the sleeve 1. The first resistance wire 54 is energized to fuse the first polyethylene ring block 6 and the second polyethylene ring block 51, and the second resistance wire 55 is used to fuse the third polyethylene ring block 52 and the polyethylene outer protective tube 7. During the melting, the contact surfaces of the first polyethylene ring block 6 and the second polyethylene ring block 51 and the third polyethylene ring block 52 and the polyethylene outer protective tube 7 are melted together by controlling the power-on time and the current size.

[0031] The waterproof casing structure of the present invention is suitable for directly buried heating pipelines in high water level soft soil areas, which can not only adapt to the universal thermal displacement of the pipeline, but also avoid water leakage or seepage at the wall casing of the well chamber in the high water level area. Moreover, the waterproof structure is installed by heating and melting with a resistance wire, which can ensure the sealing effect after installation and reduce the difficulty of installing the sealing structure. Because the inner diameter of the casing 1 is not too large, when an insulation pipe 2 is arranged inside, it is not convenient to manually enter the casing 1 to install and fix the traditional sealing structure, and it is difficult to ensure the sealing effect when the traditional sealing structure is installed without vision. The use of waterproof cloth 53 can adapt to the universal thermal displacement of the insulation pipe 2 and prevent groundwater from entering the well chamber.

[0032] As an optional solution of the present invention, the casing 1 is a steel casing.

[0033] As an optional solution of the present invention, the sleeve 1 is provided with an outwardly protruding fixing block 8, which protrudes from the outer peripheral wall of the sleeve 1 and serves to fix the sleeve 1. At the same time, the fixing block 8 is provided with a fixing groove for at least partially embedding the first polyethylene ring block 6, and the fixing groove is open toward one side of the insulation pipe 2. The first polyethylene ring block 6 is installed in the fixing groove by embedding, thereby ensuring the waterproof sealing between the sleeve 1 and a polyethylene ring block 6.

[0034] As an optional solution of the present invention, the first polyethylene ring block 6 is provided with a connecting groove for at least partially embedding the second polyethylene ring block 51. By embedding the second polyethylene ring block 51 into the connecting groove and then fusing it, the main purpose is to allow more surfaces on the first polyethylene ring block 6 and the second polyethylene ring block 5 to be fused together, thereby improving the waterproof sealing between the first polyethylene ring block 6 and the second polyethylene ring block 5.

[0035] As an optional solution of the present invention, the first displacement structure is provided at the backwater end of the casing 1, the backwater end refers to the end of the casing 1 close to the underground well chamber, and the other end of the casing 1 is the frontwater end. The first displacement structure includes a pipe clamp 31 fixedly connected to the polyethylene outer protective tube 7, and a plurality of elastic telescopic structures fixedly connected to the pipe clamp 31. The pipe clamp 31 is sleeved and clamped on the polyethylene outer protective tube 7. The plurality of elastic telescopic structures are evenly spaced along the circumferential direction of the pipe clamp 31. The number of the elastic telescopic structures is at least three. The elastic telescopic structure is arranged along the radial direction of the polyethylene outer protective tube 7. The outer end of the elastic telescopic structure abuts against the casing. 1, in this embodiment, the elastic telescopic structure includes a limiting protective sleeve 32 fixedly connected to the pipe clamp 31, a support spring 33 arranged in the limiting protective sleeve 32, and a pulley 34 fixedly connected to the support spring 33, the support spring 33 is arranged along the radial direction of the polyethylene outer protective tube 7, the pulley 34 is arranged on the support spring 33 near one end of the sleeve 1 and extends from the limiting protective sleeve 32 to abut against the sleeve 1, through the elastic expansion and contraction of the support spring 33, it can adapt to the displacement of the insulation pipe 2 in the radial direction, and through the sliding cooperation between the pulley 34 and the inner wall of the sleeve 1, it can adapt to the displacement of the insulation pipe 1 in the axial direction.

[0036] As an optional solution of the present invention, in order to prevent the sliding distance of the pulley 34 from being too large and the back water end of the casing 1 from sliding out, the back water end of the casing 1 is provided with a blocking structure for limiting the pulley 34 from sliding out of the back water end of the casing 1. The other side of the pulley 34 will not slide out from the other end of the casing 1 because a waterproof structure is provided. In this embodiment, the blocking structure includes a baffle ring 9 fixedly connected to the back water end of the casing 1. The baffle ring 9 is fixed to the casing 1 by existing fasteners such as bolts. The inner ring of the baffle ring 9 is located on the sliding path of the pulley 34. The center of the baffle ring 9 is provided with a groove for not affecting the thermal displacement of the insulation pipe 1.

[0037] As an optional solution of the present invention, the second displacement structure includes at least two discs 41 of different diameters. The number of the discs 41 can be three or even more, but a larger number of discs 41 means that the sealing performance will be reduced. The inner diameter of the disc 41 with a larger diameter is smaller than the outer diameter of the disc 41 with a smaller diameter. A movable groove 41a is provided inside the disc 41 with a larger diameter along its circumference. The outer ring of the disc 42 with a smaller diameter is movably sealed and inserted into the movable groove 41a. The outer ring of the disc 42 with a smaller diameter can move universally along its circumferential plane in the movable groove 41a of the disc 41 with a larger diameter. The outer ring of the disc 41 with a larger diameter is sealed and fixed to the inner circumferential wall of the sleeve 1, and the inner ring of the disc 42 with a smaller diameter is connected to a retaining ring 42. The retaining ring 42 is movably in contact with the polyethylene outer protective tube 7, and the relative movement between the disc 41 and the disc 41 enables the second displacement structure to adapt to the radial displacement of the thermal insulation tube 2. The retaining ring 42 is movably in contact with the polyethylene outer protective tube 7 to adapt to the axial displacement of the thermal insulation tube 2, and the disc structure can effectively prevent the soil at the water-facing end from entering the casing 1 and hindering the normal rolling of the roller and the stretching of the waterproof cloth 53. On this basis, an open groove is provided on the side of the retaining ring 42 that abuts the polyethylene outer protective tube 7, and the open groove is filled with asphalt hemp flexible material. The asphalt hemp flexible material replaces the retaining ring 42 and is movably in contact with the polyethylene outer protective tube 7, which can achieve better sealing and water-blocking effect.

[0038] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs a structure and embodiment similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A waterproof casing structure suitable for directly buried heating pipes in high water level soft soil areas, characterized by: It comprises a sleeve and an insulation pipe, a first displacement structure and a second displacement structure are provided between the sleeve and the insulation pipe, a waterproof structure is provided between the first displacement structure and the second displacement structure, a first polyethylene circular block is fixedly connected to the inner circumferential wall of the sleeve, a polyethylene outer protective tube is provided on the outside of the insulation pipe, the waterproof structure comprises a second polyethylene circular block abutting against the first polyethylene circular block, a third polyethylene circular block abutting against the polyethylene outer protective tube, and a waterproof cloth with two ends respectively sealedly connected to the second polyethylene circular block and the third polyethylene circular block, the second polyethylene circular block has a first resistance wire built in, the third polyethylene circular block has a second resistance wire built in, and further comprises a wire conductively connected to the first resistance wire and the second resistance wire, the first resistance wire is energized to fuse the first polyethylene circular block and the second polyethylene circular block, and the second resistance wire fuses the third polyethylene circular block and the polyethylene outer protective tube; The sleeve is provided with a fixing block protruding outward, and the fixing block is provided with a fixing groove for the first polyethylene ring block to be at least partially embedded.

2. The waterproof casing structure for directly buried heating pipes in high water level soft soil areas according to claim 1 is characterized by: The first polyethylene circular ring block is provided with a connecting groove for the second polyethylene circular ring block to be at least partially embedded.

3. A waterproof casing structure for directly buried heating pipes in high water level soft soil areas according to any one of claims 1-2, characterized in that: The first displacement structure is arranged at the back water end of the casing. The first displacement structure includes a pipe clamp fixedly connected to the polyethylene outer protective pipe, and several elastic telescopic structures fixedly connected to the pipe clamp. The several elastic telescopic structures are distributed along the circumferential direction of the pipe clamp, and the elastic telescopic structures are arranged along the radial direction of the polyethylene outer protective pipe.

4. The waterproof casing structure for directly buried heating pipes in high water level soft soil areas according to claim 3 is characterized by: The elastic telescopic structure includes a limiting protective sleeve fixedly connected to the pipe clamp, a support spring arranged in the limiting protective sleeve, and a pulley fixedly connected to the support spring. The support spring is arranged along the radial direction of the polyethylene outer protective tube. The pulley is arranged on the support spring near one end of the sleeve and extends from the limiting protective sleeve to abut against the sleeve.

5. The waterproof casing structure for directly buried heating pipes in high water level soft soil areas according to claim 4 is characterized by: The back-water end of the sleeve is provided with a blocking structure for limiting the pulley from sliding out of the back-water end of the sleeve.

6. The waterproof casing structure for directly buried heating pipes in high water level soft soil areas according to claim 5 is characterized by: The blocking structure comprises a baffle ring fixedly connected to the backwater end of the casing, and the inner ring of the baffle ring is located on the sliding path of the pulley.

7. A waterproof casing structure for directly buried heating pipes in high water level soft soil areas according to any one of claims 1-2, characterized in that: The second displacement structure includes at least two discs of different diameters. A movable groove is provided inside the disc with a larger diameter along its circumference. The outer ring of the disc with a smaller diameter is movably sealed and inserted into the movable groove. The outer ring of the disc with a larger diameter is sealed and fixedly connected to the inner circumferential wall of the sleeve. The inner ring of the disc with a smaller diameter is connected to a retaining ring, which movably abuts against the polyethylene outer protective tube.

8. The waterproof casing structure for directly buried heating pipes in high water level soft soil areas according to claim 7 is characterized by: An open groove is provided on one side of the retaining ring that contacts the polyethylene outer protective tube, and the open groove is filled with asphalt hemp flexible material.

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