Frost heaving prevention device for water conservancy project

Abstract

A water conservancy project frost heaving prevention device belongs to the technical field of water conservancy project facilities and comprises an outer pipe, a heat conduction pipe is fixedly installed in the outer pipe, a plurality of supporting blocks are fixedly installed between the heat conduction pipe and the outer pipe, a constant-temperature electric heating plate body is fixedly installed between every two adjacent supporting blocks, and an inner pipe is fixedly installed in the heat conduction pipe. The constant-temperature electric heating plate bodies are electrically connected with power lines, the ends, away from the constant-temperature electric heating plate bodies, of the power lines penetrate through the outer pipe to be arranged outside, a plurality of rubber cushion blocks are fixedly installed between the heat conduction pipe and the inner pipe, a plurality of circulation openings are formed in the outer surfaces of the rubber cushion blocks in a penetrating mode, and a water drainage opening is formed between the outer pipe and the heat conduction pipe in a communicating mode. The constant-temperature electric heating plate can ensure that condensate water generated in the heat exchange process of the inner pipe cannot be in contact with the constant-temperature electric heating plate main body, so that the corrosion problem is avoided, and the service life of the constant-temperature electric heating plate is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy engineering facilities, and particularly relates to an anti-freezing and swelling device for water conservancy projects. Background Technique

[0002] In cold climates, when water freezes in water conservancy pipelines, its volume will expand by about 9%. This expansion force acts on the inner wall of the pipeline and the surrounding soil. When the expansion force exceeds the bearing limit of the pipeline material, the pipeline will rupture. For example, in winter in Shenyang, the extreme low temperature can reach more than 20 degrees Celsius below zero or even lower, and the risk of pipeline freezing and swelling is extremely high. Therefore, an anti-freezing and swelling device is generally set on the outer surface of water conservancy pipelines.

[0003] Upon retrieval, in the related field, the publication number is CN210661696U, and the patent name is an anti-freezing and swelling device for water conservancy projects. Its structure specifically includes a protective outer pipe and an inner pipe; the protective outer pipe is in a sealed circular pipe structure, and a heating pipe is fixedly installed on the inner side wall of the protective outer pipe; both the protective outer pipe and the heating pipe are connected with power supply connecting wires, and both the protective outer pipe and the heating pipe are electrically connected to an external power supply through the power supply connecting wires; the inner pipe is arranged inside the heating pipe, and the inner pipe is also in a sealed circular pipe structure. The heating pipe of the anti-freezing and swelling device for water conservancy projects is composed of a top spring, a limiting plate, a heating layer, and a contact power supply block. The limiting plate is in an arc structure, and a heating layer is covered on the inner side wall of the limiting plate;

[0004] Although the anti-freezing and swelling device for water conservancy projects in the above-mentioned prior art can play a role in preventing the pipeline from freezing, in actual use, when the heating layer works, it is necessary to preheat the environment around the pipeline in advance. After the temperature difference is generated between the outer wall of the pipeline and the surrounding environment, condensed water is easily generated. This part of the condensed water is easy to slide down along the outer wall of the pipeline to the nearby heating layer and cannot be discharged. If it exists for a long time, it will corrode the metal components of the heating layer and affect the service life of the heating layer. Therefore, another anti-freezing and swelling device for water conservancy projects is provided to solve the above technical problems. Content of the Utility Model

[0005] In view of the problem that in the existing anti-freezing and swelling devices for water conservancy projects, when heating the pipeline, the generated condensed water is not easy to discharge, which affects the service life of the heating components in the long term, the present utility model provides an anti-freezing and swelling device for water conservancy projects. By installing a heat conduction pipe, the main body of the constant-temperature electric heating plate is effectively isolated from the inner pipe without interfering with the heating of the inner pipe. This design ensures that the condensed water generated during the heat exchange process of the inner pipe does not come into contact with the main body of the constant-temperature electric heating plate, thus avoiding corrosion problems and extending its service life. In addition, by providing a circulation port in the rubber cushion block and establishing a drainage port between the heat conduction pipe and the outside, the condensed water can be discharged from the pipeline, preventing the corrosion of the heat conduction pipe caused by long-term water accumulation, and effectively solving the problem that in the existing anti-freezing and swelling devices for water conservancy projects, when heating the pipeline, the generated condensed water is not easy to discharge, which affects the service life of the heating components in the long term. The specific technical solution is as follows:

[0006] An anti-freezing and swelling device for water conservancy projects, comprising an outer pipe, wherein a heat conduction pipe is fixedly installed inside the outer pipe, a plurality of support blocks are fixedly installed between the heat conduction pipe and the outer pipe, a main body of a constant-temperature electric heating plate is fixedly installed between two adjacent support blocks, an inner pipe is fixedly installed inside the heat conduction pipe, the main bodies of the constant-temperature electric heating plates are all electrically connected to a power line, and one end of the power line far away from the main body of the constant-temperature electric heating plate penetrates through the outer pipe and is arranged outside.

[0007] In the above technical solution, a plurality of rubber cushion blocks are fixedly installed between the heat conduction pipe and the inner pipe.

[0008] In the above technical solution, a plurality of circulation ports are penetrated through the outer surface of the rubber cushion block, and a drainage port is communicated between the outer pipe and the heat conduction pipe.

[0009] In the above technical solution, the rubber cushion block is made of silicone rubber or ethylene propylene rubber.

[0010] In the above technical solution, the width of the drainage port is one centimeter.

[0011] In the above technical solution, the outer pipe is a polyurethane heat-insulating pipeline.

[0012] The anti-freezing and swelling device for water conservancy projects of the present utility model, compared with the existing technology, has the beneficial effects as follows:

[0013] By installing a heat conduction pipe, the utility model realizes the effective isolation of the constant temperature electric heating plate body and the inner pipe without interfering with the heating of the inner pipe. This design ensures that the condensed water generated during the heat exchange process of the inner pipe does not come into contact with the constant temperature electric heating plate body, thus avoiding corrosion problems and extending its service life. In addition, by arranging a circulation port in the rubber cushion block and establishing a drainage port between the heat conduction pipe and the outside, the condensed water can be discharged from the pipeline, effectively preventing the corrosion of the heat conduction pipe caused by long-term water accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional overall structure schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of the outer ring heat conduction pipe structure of the utility model.

[0016] Figure 3 It is a schematic diagram of the sectional structure of the utility model.

[0017] Figure 4 It is a schematic diagram of the constant temperature electric heating plate body structure of the utility model.

[0018] Figures 1-4 In the figure, where: 1. Outer pipe; 11. Support block; 12. Drainage port; 2. Heat conduction pipe; 21. Rubber cushion block; 211. Circulation port; 3. Constant temperature electric heating plate body; 31. Power cord; 4. Inner pipe. SPECIFIC EMBODIMENTS

[0019] 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 creative efforts shall fall within the protection scope of the present utility model.

[0020] The front, back, left, right, top and bottom in this embodiment are described with Figure 1 as the reference plane. Please refer to Figures 1-4 , the present utility model provides a technical solution:

[0021] An anti-freezing and swelling device for a water conservancy project, comprising an outer pipe 1, a heat conduction pipe 2 fixedly installed inside the outer pipe 1, a plurality of support blocks 11 fixedly installed between the heat conduction pipe 2 and the outer pipe 1, a constant temperature electric heating plate body 3 fixedly installed between two adjacent support blocks 11, an inner pipe 4 fixedly installed inside the heat conduction pipe 2, the constant temperature electric heating plate body 3 is electrically connected with a power cord 31, and one end of the power cord 31 far away from the constant temperature electric heating plate body 3 penetrates through the outer pipe 1 and is arranged outside. A plurality of rubber cushion blocks 21 are fixedly installed between the heat conduction pipe 2 and the inner pipe 4, and a plurality of through holes 211 are formed in the outer surface of the rubber cushion blocks 21. A drain port 12 is communicated between the outer pipe 1 and the heat conduction pipe 2;

[0022] With the arrival of winter, according to the local temperature, the constant temperature electric heating plate body 3 can be connected to an external power supply through the power cord 31 and started for operation. During the operation, the constant temperature electric heating plate body 3 transfers heat to the periphery of the inner pipe 4 through the heat conduction pipe 2 to heat it, so as to prevent freezing and swelling caused by too low temperature. The condensed water generated when the inner pipe 4 exchanges heat with the heat conduction pipe 2 will flow down along the outer surface of the inner pipe 4, pass through the through holes 211 of the plurality of rubber cushion blocks 21, and finally be discharged from the drain port 12, thus avoiding the long-term existence of condensed water in the pipe and affecting the service life of the heat conduction pipe 2. Compared with the prior art, the device can keep the inner pipe 4 at a constant temperature to prevent freezing, isolate and discharge the condensed water generated by heat exchange from the constant temperature electric heating plate body 3, and effectively extend the service life of the internal heating components of the device.

[0023] In addition, the rubber cushion block 21 is made of silicone rubber or ethylene propylene rubber. Silicone rubber can be used for a long time in the temperature range of -100°C to 250°C, and has excellent heat resistance, cold resistance, electrical insulation and other advantages. The long-term service temperature range of ethylene propylene rubber is generally about -50°C to 150°C, and it has good heat aging resistance and weather resistance. These two kinds of rubber cushion blocks 21 are preferably applicable to this device.

[0024] In addition, in order to prevent the too large opening of the drain port 12 from affecting the heat preservation effect inside the device, the width of the drain port 12 needs to be set to one centimeter.

[0025] Finally, in order to ensure that when the constant temperature electric heating plate body 3 is heating, the temperature loss speed is reduced, the outer pipe 1 needs to be set as a polyurethane heat preservation pipeline.

Claims

1. A water conservancy project anti-freezing expansion device, comprising an outer pipe (1), characterized in that: A heat-conducting tube (2) is fixedly installed inside the outer tube (1), a plurality of support blocks (11) are fixedly installed between the heat-conducting tube (2) and the outer tube (1), a constant-temperature electric heating plate body (3) is fixedly installed between two adjacent support blocks (11), an inner tube (4) is fixedly installed inside the heat-conducting tube (2), the constant-temperature electric heating plate body (3) is electrically connected to a power line (31), and one end of the power line (31) away from the constant-temperature electric heating plate body (3) passes through the outer tube (1) and is arranged outside.

2. A water conservancy project anti-freezing and swelling device according to claim 1, characterized in that: A plurality of rubber pads (21) are fixedly installed between the heat conducting tube (2) and the inner tube (4).

3. A water conservancy project anti-freezing and swelling device according to claim 2, characterized in that: The outer surface of the rubber pad (21) is provided with a plurality of flow openings (211) extending therethrough, and a drainage opening (12) is provided between the outer tube (1) and the heat conducting tube (2) in communication.

4. A water conservancy project anti-freezing and swelling device according to claim 2, characterized in that: The rubber pad (21) is silicone rubber or ethylene propylene rubber.

5. The anti-freezing and swelling device for water conservancy projects according to claim 3, characterized in that: The width of the drain port (12) is one centimeter.

6. The anti-freezing and swelling device for water conservancy projects according to claim 1, characterized in that: The outer pipe (1) is a polyurethane heat-insulating pipe.

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