Urban heat supply primary network water return pipeline

Abstract

The utility model discloses an urban heat supply primary net water return pipeline, which belongs to the technical field of water return pipelines, and comprises a water return pipeline body, flanges are fixedly connected to the outer walls of the two ends of the water return pipeline body, and sealing rubber rings are embedded in the two ends of the water return pipeline body. A first semicircular plate is mounted at the butt joint position of the water return pipeline body, a second semicircular plate is hinged to the edge of the first semicircular plate, and limiting clamping grooves forming an embedded structure with the flanges are formed in the inner vertical face of the first semicircular plate and the inner vertical face of the second semicircular plate correspondingly. Connecting lugs are integrally formed at the butt joint ends of the first semicircular plates and the second semicircular plates, hexagonal bolts can penetrate through the assembling holes and are locked through locking nuts, every two adjacent water return pipeline bodies are connected together, the single water return pipeline body can be detached conveniently, and the water return pipeline is convenient to use. And scale on the inner wall is cleaned, so that the flow of water is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of return water pipelines, and more specifically, to a return water pipeline for the primary network of urban heating. Background Art

[0002] The return water pipe is a pipe section that only passes through the circulating flow in the hot water circulation pipe system. The centralized hot water supply system of a single building should be equipped with a hot water return pipe and a circulating water pump to ensure the hot water circulation in the main pipe and the riser. When supplying hot water centrally, such a design is required, that is, there are two pipelines from the water supply point to the water outlet, one is the hot water supply pipe and the return water pipe. After a certain period of time, the hot water in the hot water supply pipe will cool down. In order to ensure that there is hot water at the water outlet in a short time, when the hot water cools down to a certain water temperature, it is automatically pumped back by the water pump and recycled and reheated from this return water pipe.

[0003] The connection method of the existing return water pipeline of the urban heating pipe network is usually welding. Although this connection method is convenient, it is not conducive to disassembling the pipeline. After the return water pipe is used for a long time, a large amount of scale will form on its inner wall, which will cause the inner diameter of the pipeline to become smaller, affecting the water flow. It is necessary to locate and disassemble the pipeline for cleaning. In order to facilitate the disassembly and assembly of the pipeline, we propose a return water pipeline for the primary network of urban heating to solve the above problems. Summary of the Utility Model

[0004] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a return water pipeline for the primary network of urban heating, which can connect two adjacent return water pipeline bodies together by passing a hexagonal bolt through the assembly hole and locking it with a locking nut, and is also convenient to disassemble a single return water pipeline body to clean the scale on its inner wall to ensure the water flow.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A return water pipeline for the primary network of urban heating, including a return water pipeline body, and flanges are fixedly connected to the outer walls at both ends of the return water pipeline body.

[0007] Sealing rubber rings are embedded at both ends of the return water pipeline body.

[0008] A first semi-circular plate is installed at the butt joint part of the return water pipeline body. A second semi-circular plate is hinged at the edge part of the first semi-circular plate. Limiting card slots which form an embedded structure with the flanges are arranged on the inner surfaces of the first semi-circular plate and the second semi-circular plate. Connecting ears are integrally formed at the opposite end parts of the first semi-circular plate and the second semi-circular plate. Assembly holes are symmetrically arranged on the surfaces of the connecting ears. Hexagonal bolts are installed inside the assembly holes, and locking nuts are screwed at the ends of the hexagonal bolts.

[0009] Furthermore, the main body of the return water pipeline is composed of an outer lining layer and an inner lining layer, and both the outer lining layer and the inner lining layer are made of carbon steel.

[0010] Furthermore, a sandwich layer is provided between the outer lining layer and the inner lining layer, and the sandwich layer is filled with heat-insulating cotton.

[0011] Furthermore, the sealing rubber rings embedded at the ends of two adjacent main bodies of the return water pipeline are closely attached to each other.

[0012] Furthermore, an elastic gasket is sleeved on one side of the lock nut, and the elastic gasket is closely attached to the lock nut.

[0013] Furthermore, a flat washer is sleeved on one side of the elastic gasket, and the flat washer abuts against the elastic gasket and the connecting ear respectively.

[0014] Furthermore, the inner diameters of the first semi-circular plate and the second semi-circular plate are both adapted to the outer diameter of the main body of the return water pipeline.

[0015] Compared with the prior art, the advantages of the present utility model are as follows.

[0016] (1) In this solution, by engaging the flanges provided at both ends of the two main bodies of the return water pipeline with the limit card slots provided on the inner vertical surface of the first semi-circular plate, not only the axial position of the main body of the return water pipeline is limited, but also the sealing rubber rings can be closely attached to prevent water leakage at the pipe connection. Then, the second semi-circular plate is made to cooperate with the first semi-circular plate to flip until the connecting ears are mutually attached. Then, by passing the hexagon bolt through the assembly hole and locking it with the lock nut, two adjacent main bodies of the return water pipeline are connected together, and it is also convenient to disassemble a single main body of the return water pipeline to clean the water scale on its inner wall to ensure the water flow.

[0017] (2) In this solution, since the main body of the return water pipeline is composed of a double-layer structure of an outer lining layer and an inner lining layer, and there is heat-insulating cotton provided between the outer lining layer and the inner lining layer, the water temperature inside the pipeline can be reduced, and the heat loss can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 is a docking schematic diagram of the main body of the return water pipeline of the present utility model;

[0020] Figure 3 is a structural schematic diagram of the second semi-circular plate of the present utility model;

[0021] Figure 4 is an enlarged schematic diagram of part A of the present utility model;

[0022] Figure 5 Side view schematic diagram of the return water pipe body of the present utility model;

[0023] Figure 6 Cross-sectional view schematic diagram of part A-A of the return water pipe body of the present utility model.

[0024] Explanation of the reference numerals in the figure.

[0025] Return water pipe body; 2, flange; 3, sealing rubber ring; 4, first semi-circular plate; 5, second semi-circular plate; 6, limit card slot; 7, connecting ear; 8, assembly hole; 9, hexagon bolt; 10, lock nut; 11, elastic gasket; 12, flat washer; 13, outer lining layer; 14, inner lining layer; 15, heat insulation cotton. Specific implementation mode

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0027] Embodiment 1

[0028] Please refer to Figure 1-6 , a primary network return water pipe for urban heating, including a return water pipe body 1, and flanges 2 are fixedly connected to the outer walls at both ends of the return water pipe body 1.

[0029] Sealing rubber rings 3 are embedded at both ends of the return water pipe body 1.

[0030] A first semi-circular plate 4 is installed at the butt joint part of the return water pipe body 1. A second semi-circular plate 5 is hinged at the edge part of the first semi-circular plate 4. Limit card slots 6 that form an embedded structure with the flange 2 are provided on the inner surfaces of the first semi-circular plate 4 and the second semi-circular plate 5. Connecting ears 7 are integrally formed at the butting ends of the first semi-circular plate 4 and the second semi-circular plate 5. Assembly holes 8 are symmetrically provided on the surface of the connecting ear 7. A hexagon bolt 9 is installed inside the assembly hole 8, and a lock nut 10 is screwed at the end of the hexagon bolt 9.

[0031] It should be noted that by engaging the flanges 2 provided at both ends of the two return water pipe bodies 1 with the limit card slots 6 provided on the inner facade of the first semi-circular plate 4, not only the axial position of the return water pipe body 1 is limited, but also the sealing rubber rings 3 can be closely fitted together to prevent water seepage at the pipe connection. Then, the second semi-circular plate 5 is rotated in cooperation with the first semi-circular plate 4 until the connecting ears 7 are mutually fitted. Then, by passing the hexagonal bolts 9 through the assembly holes 8 and locking them with the locking nuts 10, the adjacent two return water pipe bodies 1 are connected together, and it is also convenient to disassemble a single return water pipe body 1 to clean the scale on its inner wall to ensure the water flow rate.

[0032] As Figure 5 shown, the return water pipe body 1 is composed of an outer lining layer 13 and an inner lining layer 14, and both the outer lining layer 13 and the inner lining layer 14 are made of carbon steel. A sandwich layer is provided between the outer lining layer 13 and the inner lining layer 14, and the sandwich layer is filled with heat-insulating cotton 15.

[0033] It should be noted that since the return water pipe body 1 is composed of a double-layer structure of the outer lining layer 13 and the inner lining layer 14, and there is heat-insulating cotton 15 provided between the outer lining layer 13 and the inner lining layer 14, the water temperature inside the pipe can be reduced, and the heat loss can be effectively reduced.

[0034] As Figure 1 、 Figure 2 shown, the sealing rubber rings 3 embedded at the ends of the adjacent two return water pipe bodies 1 are mutually closely fitted.

[0035] It should be noted that by the close fitting of the sealing rubber rings 3, water seepage at the pipe connection is prevented.

[0036] As Figure 4 shown, an elastic gasket 11 is sleeved on one side of the locking nut 10, and the elastic gasket 11 is closely fitted with the locking nut 10. A flat washer 12 is sleeved on one side of the elastic gasket 11, and the flat washer 12 abuts against the elastic gasket 11 and the connecting ear 7 respectively.

[0037] It should be noted that the locking nut 10 rotates in cooperation with the hexagonal bolt 9 to squeeze the elastic gasket 11 and the flat washer 12, so that the elastic acting forces of the elastic gasket 11 and the flat washer 12 can effectively prevent the locking nut 10 from loosening.

[0038] As Figure 1 、 Figure 2 shown, the inner diameters of the first semi-circular plate 4 and the second semi-circular plate 5 are both adapted to the outer diameter of the return water pipe body 1.

[0039] It should be noted that the fastening effect of the first semi-circular plate 4 and the second semi-circular plate 5 on the return water pipe body 1 is ensured.

[0040] In use: By engaging the flanges 2 provided at both ends of the two return water pipe bodies 1 with the limit card slots 6 provided on the inner facade of the first semi-circular plate 4, it not only limits the axial position of the return water pipe body 1, but also enables the sealing rubber rings 3 to fit tightly together, preventing water seepage at the pipe connection. Then, the second semi-circular plate 5 is rotated in cooperation with the first semi-circular plate 4 until the connecting ears 7 fit together. Then, by passing the hexagon bolts 9 through the assembly holes 8 and locking them with the lock nuts 10, the adjacent two return water pipe bodies 1 are connected together, and it is also convenient to disassemble a single return water pipe body 1 to clean the scale on its inner wall.

[0041] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its improvement concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A water return pipe of a primary urban heating network, comprising a water return pipe body (1), characterized in that: The outer walls of both ends of the return pipe body (1) are fixedly connected with flanges (2); Both ends of the return water pipe body (1) are inlaid with sealing rubber rings (3); A first semicircular plate (4) is installed at the joint portion of the return pipe body (1); a second semicircular plate (5) is hingedly connected to the edge of the first semicircular plate (4); the inner facades of the first semicircular plate (4) and the second semicircular plate (5) are provided with limit slots (6) forming an embedded structure with the flange (2); the end portions of the first semicircular plate (4) and the second semicircular plate (5) where they are connected are integrally formed with connecting ears (7); the surfaces of the connecting ears (7) are symmetrically provided with assembly holes (8); a hexagonal bolt (9) is installed inside the assembly hole (8); a locking nut (10) is screwed to the end of the hexagonal bolt (9).

2. A water return pipe for a primary urban heating network according to claim 1, characterized in that: The return water pipe body (1) is composed of an outer lining layer (13) and an inner lining layer (14), and the outer lining layer (13) and the inner lining layer (14) are both made of carbon steel.

3. A water return pipe for a primary urban heating network according to claim 2, characterized in that: An interlayer is provided between the outer lining layer (13) and the inner lining layer (14), and the interlayer is filled with thermal insulation cotton (15).

4. The water return pipe of the primary urban heating network according to claim 1, characterized in that: The sealing rubber rings (3) embedded in the ends of two adjacent return pipe bodies (1) are tightly fitted to each other.

5. The water return pipe of the primary urban heating network according to claim 1, characterized in that: An elastic gasket (11) is sleeved on one side of the locking nut (10), and the elastic gasket (11) is tightly fitted to the locking nut (10).

6. A water return pipe for a primary urban heating network according to claim 5, characterized in that: A flat washer (12) is sleeved on one side of the elastic washer (11), and the flat washer (12) is respectively in contact with the elastic washer (11) and the connecting ear (7).

7. The water return pipe of the primary urban heating network according to claim 1, characterized in that: The inner diameters of the first semicircular plate (4) and the second semicircular plate (5) are both adapted to the outer diameter of the return water pipe body (1).

Images