Hot water pipeline structure for connection of direct burial laying and pipe jacking laying

Abstract

The utility model belongs to the technical field of direct burial hot water pipeline heat supply, and particularly relates to a hot water pipeline structure used for connection of direct burial laying and pipe jacking laying. The system is applied to a well chamber and comprises a directly-buried water supply pipeline assembly and directly-buried water return pipeline assemblies which are arranged side by side. Wherein the directly-buried water supply pipeline assembly comprises a directly-buried water supply pipeline, a rotary compensation structure and a pipe-jacking laying water supply pipeline which are connected in sequence, one end of the directly-buried water supply pipeline and one end of the pipe-jacking laying water supply pipeline both penetrate into the well chamber, and the directly-buried water supply pipeline is higher than the pipe-jacking laying water supply pipeline; the directly-buried water return pipeline assembly comprises a directly-buried water return pipeline, a rotary compensation structure and a pipe-jacking laying water return pipeline which are sequentially connected, one end of the directly-buried water return pipeline and one end of the pipe-jacking laying water return pipeline penetrate into the well chamber, and the directly-buried water return pipeline is higher than the pipe-jacking laying water return pipeline. According to the structure, the work amount and investment for backfilling of the pipe jacking well after construction are reduced, the construction difficulty is lowered, and the construction safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of direct-buried hot water pipeline heating, in particular to a hot water pipeline structure for connecting direct-buried laying and top pipe laying. Background Art

[0002] With the development of society, centralized heating is advancing as a form of winter heating for urban residents, and the direct burial of hot water is widely used. In the direct burial of hot water pipe network, its high temperature and high pressure characteristics make the direct burial of hot water pipe network need certain compensation measures to solve the stress problem caused by thermal expansion and contraction of pipes.

[0003] At present, square compensation or a combination of square compensators and sleeve compensators are commonly used in hot water direct buried pipelines. In actual projects, local nodes that require special treatment often appear, such as sections that cannot be excavated (crossing roads, railways, etc.) and must be laid with top pipes and require compensation. Since square compensation occupies a large area and has a small compensation amount, the crossing distance is limited; for sections with long crossing distances, the layout of the pipeline will face certain difficulties. If a sleeve compensator is used, its blind plate force and friction force are large, and it is easy to cause leakage points.

[0004] The prior art patent with authorization announcement number: CN213809445U provides a thermal pipeline structure for connecting direct burial laying and jacking laying. The thermal pipeline structure adds a compound tie rod type corrugated compensator on the riser between the jacking pipe and the direct burial arrangement to perform pipeline thermal compensation. However, due to the long length of the compound tie rod type corrugated compensator, while ensuring the thickness of the soil covering the direct buried pipeline, the jacking working depth and the jacking well depth will increase. For underground inspection wells, the construction difficulty and investment will increase exponentially with every increase of 1m in depth.

[0005] Based on this, the utility model provides a novel hot water pipeline structure for connecting direct burial laying and jacking pipe laying to overcome the above-mentioned defects. Utility Model Content

[0006] The utility model aims to provide a hot water pipeline structure for connecting direct burial laying and jacking pipe laying, which connects the direct burial pipeline and the jacking pipe laying pipeline through a rotary compensation structure, and makes full use of the jacking pipe well chamber as an inspection well of the rotary compensation structure, thereby increasing the compensation amount of the pipeline, increasing the jacking pipe crossing distance of special nodes, reducing the jacking pipe working depth and the depth of the jacking pipe well, thereby reducing the engineering workload and investment of backfilling the jacking pipe well after construction, reducing the construction difficulty, and improving the construction safety.

[0007] The utility model adopts the following technical scheme: a hot water pipeline structure for connecting direct burial laying and top pipe laying, applied to the well chamber, comprising a directly buried water supply pipeline component and a directly buried water return pipeline component arranged side by side;

[0008] The directly buried water supply pipeline assembly comprises a directly buried water supply pipeline, a rotation compensation structure and a top-laid water supply pipeline connected in sequence, one end of the directly buried water supply pipeline and the top-laid water supply pipeline are both inserted into the well chamber, and the directly buried water supply pipeline is higher than the top-laid water supply pipeline, and a venting pipeline is connected to the high point of the directly buried water supply pipeline in the well chamber;

[0009] The directly buried return water pipe assembly includes a directly buried return water pipe, a rotation compensation structure and a top-pipe laid return water pipe connected in sequence, one end of the directly buried return water pipe and the top-pipe laid return water pipe are both inserted into the well chamber, and the directly buried return water pipe is higher than the top-pipe laid return water pipe, and an air venting pipe is connected to the high point of the directly buried return water pipe in the well chamber.

[0010] Furthermore, a short drain pipe and a drain pipe connected to the short drain pipe are respectively connected at the low points of the top pipe-laid water supply pipe and the top pipe-laid water return pipe in the well chamber.

[0011] Furthermore, the short drainage pipe is perpendicular to the jacking-pipe laid water supply pipe and the jacking-pipe laid water return pipe; and a drainage valve is installed on the drainage pipe.

[0012] Furthermore, the drain valve is a welded ball valve.

[0013] Furthermore, a sump is provided on one side of the bottom of the well chamber.

[0014] Furthermore, the directly buried water supply pipe and the directly buried water return pipe in the well chamber are respectively connected with air release pipes at high points, and the air release pipes extend into the sump.

[0015] Furthermore, a deflation valve is installed on the deflation pipeline.

[0016] Furthermore, the air release valve is a welded ball valve.

[0017] Furthermore, the rotary compensation structure includes a prefabricated insulated hot water pipe, two rotary compensators and four prefabricated insulated elbows. The direct-buried water supply pipe and the top-laid water supply pipe, and the direct-buried return water pipe and the top-laid return water pipe are connected through the prefabricated insulated elbows, rotary compensators and prefabricated insulated hot water pipes to form an arch structure.

[0018] Furthermore, one end of the directly buried water supply pipe and the directly buried water return pipe are both inserted into the well chamber through a flexible wall-penetrating water-stopping sleeve.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The hot water pipeline structure used for connecting direct burial laying and jacking pipe laying in the utility model connects the direct burial pipeline and the jacking pipe laying pipeline through a rotary compensation structure, and fully utilizes the jacking pipe well chamber as an inspection well of the rotary compensation structure, thereby increasing the compensation amount of the pipeline, increasing the jacking pipe crossing distance of special nodes, reducing the jacking pipe working depth and the depth of the jacking pipe well, thereby reducing the engineering workload and investment of backfilling the jacking pipe well after construction, reducing the construction difficulty, and improving the construction safety.

[0021] At the same time, compared with square compensators and sleeve compensators, the use of a rotary compensation structure for pipeline thermal displacement compensation saves floor space, reduces the blind plate force and friction of the pipeline, enhances pipeline sealing, and increases the compensation amount, that is, increases the jacking distance of special nodes. Compared with the compound tie rod type corrugated compensator, the use of a rotary compensation structure for compensation can reduce the jacking working depth and jacking well depth, reduce civil engineering investment, reduce construction difficulty, and improve construction safety.

[0022] In addition, the rotary compensation structure has good self-sealing properties, which reduces pipeline leakage points and thus saves operating and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a plan view of the hot water pipeline structure used for direct burial laying and pipe jacking laying connection of the utility model;

[0025] Figure 2 This is a cross-sectional view of the hot water pipeline structure used for connecting direct burial laying and top pipe laying in the utility model;

[0026] Among them: directly buried water supply pipe assembly 1, directly buried water supply pipe 10, rotary compensation structure 11, prefabricated insulated hot water pipe 111, rotary compensator 112, prefabricated insulated elbow 113, top-laid water supply pipe 12, directly buried return water pipe assembly 2, directly buried return water pipe 20, top-laid return water pipe 21, well chamber 3, top-laid concrete pipe 30, flexible wall-penetrating water stop sleeve 4, drainage short pipe 5, drainage pipe 6, drainage valve 7, sump 8, vent pipe 9, vent valve 90. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model.

[0028] The following is combined with Figure 1 To Attachment Figure 2 And specific embodiments, the utility model is described in detail:

[0029] like Figure 1-2 As shown, the utility model provides a hot water pipeline structure for connecting direct burial laying and top pipe laying, which is applied to a well chamber 3. In this embodiment, the well chamber 3 is a reinforced concrete well chamber. The hot water pipeline structure includes a directly buried water supply pipeline assembly 1 and a directly buried water return pipeline assembly 2 arranged side by side;

[0030] The directly buried water supply pipe assembly 1 comprises a directly buried water supply pipe 10, a rotation compensation structure 11 and a top-laid water supply pipe 12 which are connected in sequence. One end of the directly buried water supply pipe 10 and the top-laid water supply pipe 12 are both inserted into the well chamber 3. Since there is a height difference between the directly buried water supply pipe 10 and the top-laid water supply pipe 12, and the directly buried water supply pipe 10 is higher than the top-laid water supply pipe 12, the directly buried water supply pipe 10 enters the well chamber 3 and turns down through the rotation compensation structure 11 to connect to the top-laid water supply pipe 12, and a vent pipe 9 is connected to the high point of the directly buried water supply pipe 10 in the well chamber 3 to play a venting role.

[0031] The directly buried return water pipe assembly 2 includes a directly buried return water pipe 20, a rotation compensation structure 11 and a top-laid return water pipe 21 connected in sequence, and one end of the directly buried return water pipe 20 and the top-laid return water pipe 21 are both inserted into the well chamber 3. Since there is a height difference between the directly buried return water pipe 20 and the top-laid return water pipe 21, and the directly buried return water pipe 20 is higher than the top-laid return water pipe 21, the directly buried return water pipe 20 enters the well chamber 3 and is turned down through the rotation compensation structure 11 to connect to the top-laid return water pipe 21. A vent pipe 9 is connected to the high point of the directly buried return water pipe 20 in the well chamber 3 to serve as an exhaust pipe.

[0032] In this embodiment, a jacking concrete pipe 30 is provided at the wall of the well chamber 3 corresponding to the jacking water supply pipe 12 and the jacking return water pipe 21; the jacking water supply pipe 12 and the jacking return water pipe 21 are passed through and installed in the jacking concrete pipe 30. The jacking concrete pipe 30 is a pipe material commonly used in jacking construction. It is made of concrete, has high strength and durability, can withstand the pressure and load during the jacking construction process, is easy to construct, and has low cost.

[0033] The hot water pipeline structure used for connecting direct burial laying and jacking pipe laying in the utility model connects the direct burial pipeline and the jacking pipe laying pipeline through a rotary compensation structure 11, and fully utilizes the jacking pipe well chamber as an inspection well of the rotary compensation structure, thereby increasing the compensation amount of the pipeline, increasing the jacking pipe crossing distance of special nodes, reducing the jacking pipe working depth and the depth of the jacking pipe well, thereby reducing the engineering workload and investment of backfilling the jacking pipe well after construction, reducing the construction difficulty, and improving the construction safety.

[0034] At the same time, compared with square compensators and sleeve compensators, the use of a rotary compensation structure for pipeline thermal displacement compensation saves floor space, reduces the blind plate force and friction of the pipeline, enhances pipeline sealing, and increases the compensation amount, that is, increases the jacking distance of special nodes. Compared with the compound tie rod type corrugated compensator, the use of a rotary compensation structure for compensation can reduce the jacking working depth and jacking well depth, reduce civil engineering investment, reduce construction difficulty, and improve construction safety.

[0035] In addition, the rotary compensation structure has good self-sealing properties, which reduces pipeline leakage points and thus saves operating and maintenance costs.

[0036] Furthermore, a short drain pipe 5 and a drain pipe 6 connected to the short drain pipe 5 are respectively connected at the low points of the top-pipe-laid water supply pipe 12 and the top-pipe-laid return pipe 21 in the well chamber 3, and the drain pipe 6 can be extended to the nearby auxiliary drain well; it is guided to the auxiliary drain well through the short drain pipe 5 and the drain pipe 6 to play a drainage role. Specifically, the short drain pipe 5 is perpendicular to the top-pipe-laid water supply pipe 12 and the top-pipe-laid return pipe 21, and a drain valve 7 is installed on the drain pipe 6 to control the discharge. In this embodiment, the drain valve 7 is a welded ball valve.

[0037] In this embodiment, the drainage short pipe 5 and the drainage pipe 6 are both prefabricated direct buried insulated pipes. The prefabricated direct buried insulated pipes are pipes that are prefabricated and insulated in a factory and are widely used in the transportation and distribution systems of urban centralized heating, cooling and hot oil. The pipe is mainly composed of a working steel pipe for conveying the medium, a polyurethane rigid foam plastic insulation layer and a high-density polyethylene outer sleeve that are tightly combined. The prefabricated direct buried insulated pipe has the advantages of efficient thermal insulation performance, which can effectively reduce heat loss and reduce energy consumption. At the same time, it also has good waterproof and corrosion resistance, and can operate stably for a long time under harsh environmental conditions. In addition, the construction process of the prefabricated direct buried insulated pipe is simple and fast, which can greatly shorten the construction period and reduce construction costs.

[0038] Furthermore, a sump 8 is provided on one side of the bottom of the well chamber 3. Correspondingly, a vent pipe 9 is connected to the high points of the direct-buried water supply pipe 10 and the direct-buried return water pipe 20 in the well chamber 3, respectively. The vent pipe 9 extends into the sump 8 to ensure that the gas in the pipe can be discharged in time. A vent valve 90 is installed on the vent pipe 9. In this embodiment, the vent valve 90 is a welded ball valve, which is a ball valve using a welding connection method. Compared with other types of ball valves, the welded ball valve has the advantages of firm connection, good sealing, strong corrosion resistance, easy installation, and low maintenance cost. In this embodiment, the vent pipe 9 is a prefabricated direct-buried insulated pipe.

[0039] Furthermore, the rotary compensation structure 11 includes a prefabricated insulated hot water pipe 111, two rotary compensators 112 and four prefabricated insulated elbows 113. The direct-buried water supply pipe 10 and the top-laid water supply pipe 12, and the direct-buried return water pipe 20 and the top-laid return water pipe 21 are connected through the prefabricated insulated elbows 113, the rotary compensators 112 and the prefabricated insulated hot water pipe 111 to form an arch structure.

[0040] The prefabricated insulated hot water pipe 111 is a pipe with heat preservation performance, which is used to transport hot water. Specifically, it can be composed of a working steel pipe, a heat preservation layer and an outer protective pipe, wherein the heat preservation layer generally adopts materials such as polyurethane foam, which can effectively reduce heat loss and improve the utilization rate of heat energy. The use of the prefabricated insulated hot water pipe 111 has the advantages of good heat preservation performance, safety and reliability, convenient construction, and long service life.

[0041] Specifically, corresponding prefabricated insulated elbows 113 can be installed at both ends of the rotary compensator 112 to form a rotary compensator. The two sets of rotary compensators are connected by a prefabricated insulated hot water pipe 111 to form an arched rotary compensator structure 11. The specific form of the arched structure is not limited, and can be as follows: Figure 1 , 2 However, preferably, the rotation compensation structure in the directly buried water supply pipeline assembly 1 is a U-shaped arch structure in the vertical section, such as Figure 1 , 2 As shown; the rotation compensation structure in the return pipe assembly 2 laid directly in the horizontal section is a U-shaped arch structure, such as Figure 1 , 2 As shown, the rotation compensation structure in the directly buried water supply pipe assembly 1 and the rotation compensation structure in the directly buried water return pipe assembly 2 are spatially staggered, and the rotation compensation structures of the two pipes are arranged in the well chamber 3, saving installation space. At the same time, the rotation compensator 112 has good self-sealing performance, reduces pipeline leakage points, and thus saves operation and maintenance costs. At the same time, the rotation compensator 112 has a large compensation amount, and the arm length is short and the height is small when arranged vertically.

[0042] Furthermore, one end of the direct-buried water supply pipe 10 and the direct-buried return pipe 20 are both inserted into the well chamber 3 through the flexible wall-penetrating waterproof sleeve 4. The flexible wall-penetrating waterproof sleeve 4 is a waterproof sealing device for pipes to penetrate the wall, which can be made of metal or plastic, has certain flexibility and elasticity, can adapt to the vibration and deformation of the pipe, and can effectively prevent water from leaking from the gap between the pipe and the wall, playing a waterproof sealing and buffering role. In this embodiment, the flexible wall-penetrating waterproof sleeve 4 must be cast in the concrete wall at one time, which can meet the thermal elongation requirements of the direct-buried pipe.

[0043] The utility model is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the utility model. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the utility model.

Claims

1. A hot water pipeline structure for connecting direct burial laying and top pipe laying, applied to a well chamber, characterized by: It includes a directly buried water supply pipe assembly and a directly buried water return pipe assembly arranged side by side; The directly buried water supply pipeline assembly comprises a directly buried water supply pipeline, a rotation compensation structure and a top-laid water supply pipeline connected in sequence, one end of the directly buried water supply pipeline and the top-laid water supply pipeline are both inserted into the well chamber, and the directly buried water supply pipeline is higher than the top-laid water supply pipeline, and a venting pipeline is connected to the high point of the directly buried water supply pipeline in the well chamber; The directly buried return water pipe assembly includes a directly buried return water pipe, a rotation compensation structure and a top-pipe laid return water pipe connected in sequence, one end of the directly buried return water pipe and the top-pipe laid return water pipe are both inserted into the well chamber, and the directly buried return water pipe is higher than the top-pipe laid return water pipe, and an air venting pipe is connected to the high point of the directly buried return water pipe in the well chamber.

2. The hot water pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 1 is characterized in that: A short drain pipe and a drain pipe connected to the short drain pipe are respectively connected at the low points of the top pipe-laid water supply pipe and the top pipe-laid water return pipe in the well chamber.

3. The hot water pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 2 is characterized in that: The short drain pipe is perpendicular to the pipe-jacking water supply pipe and the pipe-jacking water return pipe; And a drain valve is installed on the drain pipe.

4. The hot water pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 3 is characterized in that: The drain valve is a welded ball valve.

5. The hot water pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 1 is characterized in that: A sump is provided at one side of the bottom of the well chamber.

6. The hot water pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 5 is characterized in that: The air venting pipe extends into the sump.

7. The hot water pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 6 is characterized in that: A deflation valve is installed on the deflation pipeline.

8. The hot water pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 7 is characterized in that: The air release valve is a welded ball valve.

9. The hot water pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 1 is characterized in that: The rotary compensation structure includes a prefabricated insulated hot water pipe, two rotary compensators and four prefabricated insulated elbows. The direct buried water supply pipe and the top pipe laid water supply pipe, and the direct buried return water pipe and the top pipe laid return water pipe are connected through the prefabricated insulated elbows, rotary compensators and prefabricated insulated hot water pipes to form an arch structure.

10. The hot water pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 1, characterized in that: One end of the directly buried water supply pipe and the directly buried water return pipe are both inserted into the well chamber through a flexible wall-penetrating waterproof sleeve.

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