Steam pipeline structure for connection of direct burial laying and pipe jacking laying

Abstract

The utility model belongs to the technical field of direct burial steam pipeline heat supply, and particularly relates to a steam pipeline structure used for connection of direct burial laying and pipe jacking laying. The steam pipeline structure is applied to a well chamber and comprises a directly-buried steam pipeline, a rotation compensation structure and a pipe-jacking laying steam pipeline which are sequentially connected. Wherein one end of the directly-buried steam pipeline and one end of the pipe-jacking laying steam pipeline penetrate into the well chamber, the directly-buried steam pipeline is higher than the pipe-jacking laying steam pipeline, and a drainage device is connected to the low point of the pipe-jacking laying steam pipeline in the well chamber. According to the steam pipeline structure, the compensation amount of the pipeline is increased, the pipe jacking crossing distance of a special node is increased, and the pipe jacking working depth and the depth of a pipe jacking well are reduced, so that the engineering amount and investment for backfilling of the constructed pipe jacking well are reduced, and the construction safety is improved; meanwhile, the drainage device is connected to the low point of the steam pipeline laid on the top pipe, the condensation and drainage effects are achieved, and the service life of the steam pipeline is prolonged.

Description

Technical Field

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

[0002] With the improvement of national environmental protection requirements, cogeneration units with industrial heat load as the main load have the advantages of high comprehensive energy utilization efficiency, energy saving and environmental protection. Steam heating pipelines are the link between heat sources and urban industrial heat users. In order not to affect the beauty of the city, most urban steam heating adopts the steel jacket steel direct burial method. In the steam direct burial pipeline network, its high temperature and high pressure characteristics make the steam direct burial pipeline network need certain compensation measures to solve the stress problem caused by thermal expansion and contraction of the pipeline. At present, square compensation or a combination of corrugated compensators are commonly used in steam direct burial pipelines.

[0003] In actual projects, there are often local nodes that require special treatment, such as sections that cannot be excavated (crossing roads, railways, etc.) and must be laid with top pipes and require compensation. Since the square compensation occupies a large area and the compensation amount is small, the crossing distance is limited; for sections with long crossing distances, the layout of the pipeline will face certain difficulties. If a corrugated compensator is used, its blind plate force is large and its service life is short. At the same time, steam heating pipelines will produce condensed water during operation, corroding the pipelines and affecting the service life of the pipelines.

[0004] Based on this, the utility model provides a novel steam pipeline structure for connecting direct burial laying and jacking pipe laying to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model aims to provide a steam pipeline structure for connecting direct burial laying and jacking pipe laying, wherein the steam pipeline structure 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; at the same time, a drain device is connected to the low point of the jacking pipe laying steam pipeline to play a condensation and draining role, thereby extending the service life of the steam pipeline.

[0006] The utility model adopts the following technical scheme: a steam pipeline structure for connecting direct buried laying and top pipe laying, applied to the well chamber, the steam pipeline structure comprises a direct buried steam pipeline, a rotary compensation structure and a top pipe laying steam pipeline connected in sequence;

[0007] Among them, one end of the direct-buried steam pipe and the top-laid steam pipe are both inserted into the well chamber, and the direct-buried steam pipe is higher than the top-laid steam pipe, and a drain device is connected to the low point of the top-laid steam pipe in the well chamber.

[0008] Further, the drain device includes a first hot-pressed tee, a second hot-pressed tee and a drain trap;

[0009] The first hot-pressed tee is installed on the top pipe laying steam pipeline, two parallel ports of the first hot-pressed tee are connected to the top pipe laying steam pipeline, and the vertical port of the first hot-pressed tee is connected to the first parallel port of the second hot-pressed tee through a drain short pipe;

[0010] A welding plug is installed at the second parallel port of the second hot-pressed tee, and a first drain pipe and a second drain pipe are installed at the vertical port of the second hot-pressed tee, and the first drain pipe and the second drain pipe are arranged side by side;

[0011] A first drain valve is installed on the first drain pipe, and a second drain valve, the drain trap and a third drain valve are installed in sequence on the second drain pipe.

[0012] Furthermore, the first drain valve, the second drain valve and the third drain valve are all flange gate valves.

[0013] Furthermore, the drain short pipe, the first drain pipe and the second drain pipe are all seamless steel pipes.

[0014] Furthermore, one end of the directly buried steam pipe is penetrated into the well chamber through a flexible wall-penetrating waterproof sleeve.

[0015] Furthermore, the direct buried steam pipeline and the jacking-laid steam pipeline are both steel-jacketed prefabricated direct buried steam insulation pipes.

[0016] Furthermore, the steel-jacketed prefabricated direct-buried steam insulation pipe comprises a steam working pipe, an insulation layer, an outer sliding bracket and an outer protective steel pipe;

[0017] Wherein, the thermal insulation layer is wrapped around the outer wall of the steam working pipe, the outer sliding bracket is installed at the bottom of the thermal insulation layer, and an outer protective steel pipe is arranged outside the thermal insulation layer.

[0018] Furthermore, the well chamber is a reinforced concrete well chamber.

[0019] Furthermore, the rotary compensating structure comprises a prefabricated insulated steam pipe, two rotary compensators and four prefabricated insulated elbows;

[0020] Among them, the directly buried steam pipeline and the top pipe-laid steam pipeline are connected through the prefabricated insulation elbow, the rotary compensator and the prefabricated insulation steam pipeline to form an arch structure.

[0021] Further, the steam pipeline structure is arranged in two groups side by side, including a first steam pipeline structure and a second steam pipeline structure;

[0022] Among them, the rotational compensation structure in the first steam pipe structure is a U-shaped arch structure in the vertical section; the rotational compensation structure in the second steam pipe structure is a U-shaped arch structure in the horizontal section, so as to realize the spatial staggering of the rotational compensation structure in the first steam pipe structure and the rotational compensation structure in the second steam pipe structure.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The steam 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.

[0025] Compared with square compensators and corrugated compensators, the use of rotary compensators for pipeline thermal displacement compensation saves floor space, reduces the blind plate force of the pipeline, increases the service life of the pipeline, 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 rotary compensation structure for compensation can reduce the working depth of the jacking pipe and the depth of the jacking well, reduce the investment in civil engineering, reduce the difficulty of construction, and improve the safety of construction.

[0026] At the same time, the use of a rotary compensation structure as a compensation device can reduce the pressure drop of the steam pipeline and the thrust of the fixed point. At the same time, the rotary compensation structure has good self-sealing properties, which reduces pipeline leakage points and thus saves operating and maintenance costs.

[0027] In addition, a drain device is connected to the low point of the steam pipeline laid on the top pipe to play a condensation and drainage role, thereby extending the service life of the steam pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 It is a plan view of the steam pipeline structure for connection between direct burial laying and pipe jacking laying (single pipe);

[0030] Figure 2 It is a cross-sectional view of the steam pipeline structure for connection between direct burial laying and pipe jacking laying (single pipe);

[0031] Figure 3 for Figure 1 Schematic diagram of the specific structure of the middle drain device;

[0032] Figure 4 It is a plan view of the steam pipeline structure for connection between direct burial laying and pipe jacking laying (double pipe);

[0033] Figure 5 It is a cross-sectional view of the steam pipeline structure for connection between direct burial laying and pipe jacking laying (double pipe);

[0034] Among them: well chamber 1, directly buried steam pipe 2, steam working pipe 20, insulation layer 21, outer sliding bracket 22, outer protective steel pipe 23, rotary compensation structure 3, prefabricated insulated steam pipe 30, rotary compensator 31, prefabricated insulated elbow 32, jacking steam pipe 4, drain device 5, first hot-pressed tee 50, second hot-pressed tee 51, drain device 52, drain short pipe 53, welding plug 54, first drain pipe 55, second drain pipe 56, first drain valve 57, second drain valve 58, third drain valve 59, concrete pipe for jacking 6, flexible wall-penetrating water-stop sleeve 7, drainage auxiliary well 8. DETAILED DESCRIPTION

[0035] 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.

[0036] The following is combined with Figure 1 To Attachment Figure 5 And specific embodiments, the utility model is described in detail:

[0037] like Figure 1-5As shown, the utility model provides a steam pipe structure for connecting direct burial laying and jacking pipe laying, which is applied to a well chamber 1. In this embodiment, the well chamber 1 is a reinforced concrete well chamber, which is made of reinforced concrete and has the advantages of strong structure, good waterproofness, low maintenance cost, and strong adaptability.

[0038] The steam pipeline structure comprises a directly buried steam pipeline 2, a rotary compensation structure 3 and a jacking-laid steam pipeline 4 which are connected in sequence.

[0039] Among them, one end of the direct buried steam pipe 2 and the top pipe laying steam pipe 4 are both inserted into the well chamber 1. Since there is a height difference between the direct buried steam pipe 2 and the top pipe laying steam pipe 4, and the direct buried steam pipe 2 is higher than the top pipe laying steam pipe 4, the direct buried steam pipe 2 enters the well chamber 1 and turns down through the rotating compensation structure 3 to connect the top pipe laying water supply pipe 4, and a drain device 5 is connected at the low point of the top pipe laying steam pipe 4 in the well chamber 1 to play a condensation and drainage role. The drain device 5 can be extended to the nearby drainage auxiliary well 8; the drain device 5 plays a condensation and drainage role and is guided to the drainage auxiliary well.

[0040] In this embodiment, a concrete pipe 6 for jacking pipe is arranged at the wall of the well chamber 1 corresponding to the jacking pipe steam pipe 4, and the jacking pipe steam pipe 4 is passed through and installed in the concrete pipe 6 for jacking pipe. The concrete pipe 6 for jacking pipe is a pipe material commonly used in jacking pipe construction. It is made of concrete, has high strength and durability, can withstand the pressure and load during the jacking pipe construction process, and is easy to construct and has low cost.

[0041] The steam pipeline structure used for connecting direct burial laying and jacking laying in the utility model connects the direct burial pipeline with the jacking laying pipeline through a rotary compensation structure 3, and fully utilizes the jacking well chamber as an inspection well of the rotary compensation structure, thereby increasing the compensation amount of the pipeline, increasing the jacking crossing distance of special nodes, reducing the jacking working depth and the depth of the jacking well, thereby reducing the engineering workload and investment of backfilling the jacking well after construction, reducing the construction difficulty, and improving the construction safety.

[0042] Compared with square compensators and corrugated compensators, the use of rotary compensators for pipeline thermal displacement compensation saves floor space, reduces the blind plate force of the pipeline, increases the service life of the pipeline, 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 rotary compensation structure for compensation can reduce the working depth of the jacking pipe and the depth of the jacking well, reduce the investment in civil engineering, reduce the difficulty of construction, and improve the safety of construction.

[0043] At the same time, the use of a rotary compensation structure as a compensation device can reduce the pressure drop of the steam pipeline and the thrust of the fixed point. At the same time, the rotary compensation structure has good self-sealing properties, which reduces pipeline leakage points and thus saves operating and maintenance costs.

[0044] In addition, a drain device 5 is connected to the low point of the steam pipeline 4 laid on the top pipe to play a condensation and drainage role, thereby extending the service life of the steam pipeline.

[0045] Furthermore, the drain device 5 includes a first hot-pressed tee 50, a second hot-pressed tee 51 and a drain 52. In this embodiment, the size of the first hot-pressed tee 50 is larger than that of the second hot-pressed tee 51, the first hot-pressed tee 50 plays a role in condensing and collecting water, and the second hot-pressed tee 51 plays a role in draining water. The first hot-pressed tee 50 is installed on the top pipe laying steam pipeline 4, and the two parallel ports of the first hot-pressed tee 50 are connected to the top pipe laying steam pipeline 4, and the vertical port of the first hot-pressed tee 50 is connected to the first parallel port of the second hot-pressed tee 51 through a drain short pipe 53.

[0046] A welding plug 54 is installed at the second parallel port of the second hot-pressed tee 51, and a first drain pipe 55 and a second drain pipe 56 are installed at the vertical port of the second hot-pressed tee 51, and the first drain pipe 55 and the second drain pipe 56 are arranged side by side. A first drain valve 57 is installed on the first drain pipe 55, and a second drain valve 58, the steam trap 52 and a third drain valve 59 are installed on the second drain pipe 56 in sequence.

[0047] During operation, when the steam pipeline is started and operated during heating, the first drain valve 57 is opened, and the second drain valve 58 and the third drain valve 59 are closed. At this time, the steam condensate is discharged to the nearby drainage auxiliary well by starting the first drain pipe 55. When the steam pipeline completes the normal operation of the heating pipe, the first drain valve 57 is closed, and the second drain valve 58 and the third drain valve 59 are opened. At this time, the steam condensate is discharged to the nearby drainage auxiliary well through the second drain pipe 56. When the steam trap 52 fails, the second drain valve 58 and the third drain valve 59 are closed, and the first drain valve 57 is opened. The steam condensate is temporarily discharged by starting the second drain pipe 56. After the drain valves are overhauled, each drain valve returns to its original normal working state.

[0048] In this embodiment, the first drain valve 57, the second drain valve 58 and the third drain valve 59 are all flange gate valves. The flange gate valve is a common valve type, which has the advantages of good sealing performance, high temperature and high pressure resistance, easy operation, small flow resistance, and strong structure.

[0049] In this embodiment, the drain short pipe 53, the first drain pipe 55 and the second drain pipe 56 are all seamless steel pipes, which have the advantages of high strength, good corrosion resistance, good sealing performance and high precision.

[0050] Furthermore, one end of the direct buried steam pipe 2 is penetrated into the well chamber 1 through a flexible wall-penetrating waterproof sleeve 7. The flexible wall-penetrating waterproof sleeve 7 is a waterproof sealing device for pipes to penetrate walls. It 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 7 must be cast in the concrete wall at one time, which can meet the thermal elongation requirements of the direct buried pipe.

[0051] Furthermore, the direct buried steam pipe 2 and the jacking steam pipe 4 are both steel-jacketed prefabricated direct buried steam insulation pipes, which have good insulation effect, corrosion resistance, hydrophobicity and compensation functions.

[0052] In this embodiment, the steel-jacketed steel prefabricated direct-buried steam insulation pipe includes a steam working pipe 20, an insulation layer 21, an outer sliding bracket 22 and an outer protective steel pipe 23.

[0053] The steam working pipe 20 is used to transport steam; the thermal insulation layer 21 is wrapped around the outer wall of the steam working pipe 20 to play a role in thermal insulation and reduce heat loss.

[0054] The outer sliding bracket 22 is installed at the bottom of the insulation layer 21. The outer sliding bracket 22 is used to support and fix the bracket of the insulation pipe, and allows the pipe to slide freely within a certain range to adapt to thermal expansion and contraction. At the same time, an outer protective steel pipe 23 is arranged outside the insulation layer 21 to protect the insulation layer 21 and the steam working pipe 20, thereby increasing the mechanical strength and durability of the pipeline.

[0055] Furthermore, the rotary compensation structure 3 includes a prefabricated insulated steam pipe 30, two rotary compensators 31 and four prefabricated insulated elbows 32. The direct-buried steam pipe 2 and the top-laid steam pipe 4 are connected through the prefabricated insulated elbows 32, the rotary compensators 31 and the prefabricated insulated steam pipe 30 to form an arch structure.

[0056] The prefabricated insulated steam pipe 30 is a pipe with heat preservation performance, which is used to transport steam. Specifically, it can be composed of three parts: an inner steel pipe, an insulation layer and an outer composite steel pipe, forming a complete insulation structure. The prefabricated insulated steam pipe 30 has the advantages of good heat preservation performance, safety and reliability, convenient construction, and long service life.

[0057] Specifically, corresponding prefabricated insulated elbows 32 can be installed at both ends of the rotary compensator 31 to form a rotary compensator, and the two sets of rotary compensators are connected by a prefabricated insulated steam pipe 30 to form an arched rotary compensation structure 3, and the specific form of the arched structure is not limited, and can be as follows: Figure 1 , 2 , 4, and 5. The rotary compensator 31 has good self-sealing performance, reduces pipeline leakage points, and thus saves operation and maintenance costs. At the same time, the rotary compensator 31 has a large compensation amount, and when arranged vertically, the arm length is short and the height is small.

[0058] Specifically, multiple groups of steam pipeline structures can be arranged side by side, and the rotation compensation structures in the multiple groups of steam pipeline structures can be arranged in a staggered manner to save installation space. For example, in this embodiment, two groups of steam pipeline structures are arranged, including a first steam pipeline structure and a second steam pipeline structure;

[0059] Wherein, the rotation compensation structure in the first steam pipeline structure is a U-shaped arch structure in the vertical section, such as Figure 4 , 5 As shown; the rotation compensation structure in the second steam pipeline structure is a U-shaped arch structure in the horizontal section, such as Figure 4 , 5 As shown, in order to realize the spatial staggering of the rotation compensation structure in the first steam pipe structure and the rotation compensation structure in the second steam pipe structure, the rotation compensation structures of the two steam pipes are arranged in the well chamber 1 to save installation space.

[0060] 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 steam pipeline structure for connecting direct burial laying and jacking pipe laying, applied to a well chamber, characterized by: The steam pipeline structure includes a directly buried steam pipeline, a rotary compensation structure and a jacking steam pipeline connected in sequence; Among them, one end of the direct-buried steam pipe and the top-laid steam pipe are both inserted into the well chamber, and the direct-buried steam pipe is higher than the top-laid steam pipe, and a drain device is connected to the low point of the top-laid steam pipe in the well chamber.

2. The steam pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 1 is characterized in that: The drain device comprises a first hot-pressed tee, a second hot-pressed tee and a drain trap; The first hot-pressed tee is installed on the top pipe laying steam pipeline, two parallel ports of the first hot-pressed tee are connected to the top pipe laying steam pipeline, and the vertical port of the first hot-pressed tee is connected to the first parallel port of the second hot-pressed tee through a drain short pipe; A welding plug is installed at the second parallel port of the second hot-pressed tee, and a first drain pipe and a second drain pipe are installed at the vertical port of the second hot-pressed tee, and the first drain pipe and the second drain pipe are arranged side by side; A first drain valve is installed on the first drain pipe, and a second drain valve, the drain trap and a third drain valve are installed in sequence on the second drain pipe.

3. The steam pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 2 is characterized in that: The first drain valve, the second drain valve and the third drain valve are all flange gate valves.

4. The steam pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 2 is characterized in that: The short drain pipe, the first drain pipe and the second drain pipe are all seamless steel pipes.

5. The steam pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 1 is characterized in that: One end of the directly buried steam pipe is inserted into the well chamber through a flexible wall-penetrating waterproof sleeve.

6. The steam pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 1 is characterized in that: The direct buried steam pipeline and the jacking-laid steam pipeline are both steel-jacketed prefabricated direct buried steam insulation pipes.

7. The steam pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 6 is characterized in that: The steel jacketed prefabricated direct buried steam insulation pipe comprises a steam working pipe, an insulation layer, an outer sliding bracket and an outer protective steel pipe; Wherein, the thermal insulation layer is wrapped around the outer wall of the steam working pipe, the outer sliding bracket is installed at the bottom of the thermal insulation layer, and an outer protective steel pipe is arranged outside the thermal insulation layer.

8. The steam pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 1 is characterized in that: The well chamber is a reinforced concrete well chamber.

9. The steam pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 1 is characterized in that: The rotary compensation structure comprises a prefabricated insulated steam pipe, two rotary compensators and four prefabricated insulated elbows; Among them, the directly buried steam pipeline and the top pipe-laid steam pipeline are connected through the prefabricated insulation elbow, the rotary compensator and the prefabricated insulation steam pipeline to form an arch structure.

10. The steam pipeline structure for connecting direct burial laying and pipe jacking laying according to claim 9, characterized in that: The steam pipeline structure is arranged in two groups side by side, including a first steam pipeline structure and a second steam pipeline structure; Among them, the rotational compensation structure in the first steam pipe structure is a U-shaped arch structure in the vertical section; the rotational compensation structure in the second steam pipe structure is a U-shaped arch structure in the horizontal section, so as to realize the spatial staggering of the rotational compensation structure in the first steam pipe structure and the rotational compensation structure in the second steam pipe structure.

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