Bypass valve group structure of steam valve

Abstract

The utility model discloses a bypass valve group structure of a steam valve, which comprises a pipeline, the steam valve arranged on the pipeline and drain tanks arranged on two sides of the steam valve, drain pipes connected with the pipeline are arranged in the drain tanks, a bypass pipeline is connected between the two drain pipes, and a bypass valve group is arranged on the bypass pipeline. The steam valve bypass pipeline is novel in design and simple in structure, the steam valve bypass pipeline is designed through the drain tank on an existing steam pipe network, the influence of bypass pipeline construction on the steam pipeline is avoided, steam supply is not influenced during construction, the integrity of the steam pipeline is kept, and the safety risk of steam pipeline operation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steam pipelines, in particular to a bypass valve group structure of a steam valve. Background Art

[0002] Municipal steam pipe systems, also known as district heating systems, are mainly used to centrally generate steam and transport it to individual users or buildings through a pipe network for heating and a range of industrial applications.

[0003] Generally, municipal direct-buried steam pipe valves are mainly used to close or open steam pipes. When the steam valve is large, due to the large pressure difference on both sides of the valve, a bypass pipe needs to be set to facilitate the opening and closing of the valve. However, the current bypass pipe setting requires drilling holes in the steam main pipe, affecting the safety of the pipeline. At the same time, the user is also required to cooperate in stopping the steam during construction, affecting the user's production needs. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art that the bypass pipe needs to be set up with a hole in the steam main pipe, which affects the safety of the pipeline, and the user's cooperation in stopping steam during construction also affects the user's production needs, and proposes a bypass valve group structure for a steam valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A bypass valve group structure of a steam valve comprises a pipeline and a steam valve arranged on the pipeline, and a drain box arranged on both sides of the steam valve, wherein a drain pipe connected to the pipeline is arranged in the drain box, a bypass pipe is connected between the two drain pipes, and a bypass valve group is arranged on the bypass pipe.

[0007] A bypass valve group structure of a steam valve comprises a pipeline and a steam valve arranged on the pipeline, and a drain box arranged on one side of the steam valve, wherein the drain box is provided with a drain pipe connected to the pipeline, a bypass pipe is connected between the other side of the pipeline corresponding to the steam valve and the drain pipe, and a bypass valve group is arranged on the bypass pipe.

[0008] Preferably, the bypass valve group is provided with two bypass valves.

[0009] More preferably, both of the two bypass valves are controllable one-way valves, which do not allow steam to flow between the two bypass valves in a closed state.

[0010] Preferably, the bypass pipe is a small diameter pipe.

[0011] Preferably, the drain tank is arranged on the steam coming side.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. In the utility model, the bypass pipeline is installed with the help of the drain box, which can effectively avoid or reduce the opening of holes on the steam pipeline, reduce the construction difficulty, maintain the integrity of the steam pipeline, and greatly reduce the operation risk of the steam pipeline;

[0014] 2. In the utility model, through the design of the bypass pipeline, when construction is carried out on the main pipeline or the branch pipeline, there is no need to shut down the steam supply of the main pipeline, which does not affect the steam use of users on the pipeline network and has a small impact on the construction.

[0015] The utility model has a novel design and a simple structure. It utilizes the drain box on the existing steam pipe network to design the steam valve bypass pipeline, thereby avoiding the impact of bypass pipe construction on the steam pipeline. The construction does not affect the steam supply, maintains the integrity of the steam pipeline, and reduces the safety risk of steam pipeline operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the pipeline structure using two drain tanks to connect the bypass pipe.

[0017] Figure 2 This is a schematic diagram of the pipeline structure using a drain tank to connect the bypass pipe.

[0018] Figure 3 For attachment Figure 2 Schematic diagram of the pipeline structure in the middle drain tank.

[0019] In the figure: main pipeline 1, main line valve 11, branch pipeline 2, branch line valve 21, bypass pipeline 3, bypass valve group 31, bypass valve 311, drain box 4, drain pipe 41. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-3 A bypass valve group structure of a steam valve includes a pipeline and a steam valve arranged on the pipeline, and a drain box 4 arranged on both sides of the steam valve, wherein the pipeline can be a main pipeline 1 or a branch pipeline 2, and the steam valve can be a main line valve 11 or a branch line valve 21. The drain box 4 is provided with a drain pipe 41 connected to the pipeline, and a bypass pipeline 3 is connected between the two drain pipes 41, and a bypass valve group 31 is arranged on the bypass pipeline 3. A valve is originally designed in the water delivery pipe 41. When the bypass pipeline 3 is constructed, the valve originally designed on the water delivery pipe 41 can be closed, and the construction can be carried out without stopping the steam.

[0022] When a larger steam valve is used, it is difficult to open and close the steam valve due to the large pressure difference on both sides of the steam valve. Generally, a bypass pipe needs to be set to facilitate the opening and closing of the valve. However, the bypass pipe needs to be drilled in the pipeline. Especially when the bypass pipe is installed on the main pipeline 1, the drilling construction needs to shut down the steam, which affects the steam supply and the integrity of the pipeline, reducing the safe operation capability. In the current steam pipeline design, a drain tank 4 is set to remove the accumulated condensed water. The design of this structure uses the drain tanks 4 on both sides of the steam pipeline to construct the bypass pipeline 3. There is no need to open a new tee on the steam pipeline to connect the bypass pipe. There is no need to stop the steam during construction. The construction is convenient and does not affect the user's steam use.

[0023] In some pipelines, such as the branch pipeline 2 entering the household, the drain box 4 is generally not set. In this case, the bypass pipeline 3 cannot be connected between the drain boxes 4 set on both sides of the two steam valves. At this time, the steam direction side of the steam valve corresponding to the steam valve can be kept closed during the pipeline installation and construction. There is no need to stop the steam, which is convenient for construction and avoids the impact on the steam use of online users. A three-way joint is installed to connect the bypass pipeline 3, and the other end of the bypass pipeline 3 is connected to the drain pipe 41 in the drain box 4 on the other side of the steam valve. Only one hole needs to be opened on the branch pipeline 2 to effectively control safety risks.

[0024] Based on the above technical solution, when the steam valve needs to be opened, the two ends of the bypass pipe 3 are connected when the bypass valve group 31 is opened first, so that the pressure difference on both sides of the steam valve is reduced so that the steam valve can be opened with a smaller force. After the steam valve is opened, the bypass valve group 31 can be closed. It is easy to use and does not require construction on the steam pipeline. The construction difficulty is small and the construction operation is convenient. It does not affect the stable steam supply of the steam pipeline. At the same time, it also improves the integrity of the main steam pipeline and reduces the risk of pipeline operation.

[0025] In this technical solution, if Figure 1-3 As shown, the bypass valve group 31 is provided with two bypass valves 311, and the two bypass valves 311 are selected as controllable one-way valves, and in the closed state, steam is not allowed to flow between the two bypass valves 311. In this embodiment, the bypass valve 311 can select a DN50 controllable one-way valve, and when the bypass valve 311 is closed, the design of the one-way valve can ensure the sealing of the bypass pipeline 3 and the safety of the pipeline.

[0026] In this technical solution, if Figure 1-3 As shown, the bypass pipe 3 is made of a small diameter pipe. It can be made of a D20 seamless steel pipe, which is selected according to the design pressure of the steam pipeline. The bypass pipe 3 with a small diameter can facilitate the opening and closing of the bypass valve group 31, ensuring the ease of use of the bypass pipe 3.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bypass valve group structure of a steam valve, characterized in that: It includes a pipeline and a steam valve arranged on the pipeline, and a drain box arranged on both sides of the steam valve. The drain box is provided with a drain pipe connected to the pipeline, a bypass pipe is connected between the two drain pipes, and a bypass valve group is arranged on the bypass pipe.

2. A bypass valve group structure of a steam valve, characterized in that: It includes a pipeline and a steam valve arranged on the pipeline, and a drain box arranged on one side of the steam valve. The drain box is provided with a drain pipe connected to the pipeline. A bypass pipeline is connected between the other side of the corresponding steam valve on the pipeline and the drain pipe, and a bypass valve group is arranged on the bypass pipeline.

3. A bypass valve group structure of a steam valve according to any one of claims 1 or 2, characterized in that: The bypass valve group is provided with two bypass valves.

4. A bypass valve group structure of a steam valve according to claim 3, characterized in that: The two bypass valves are both controllable one-way valves, and in their closed state, steam is not allowed to flow between the two bypass valves.

5. A bypass valve group structure for a steam valve according to any one of claims 1 or 2, characterized in that: The bypass pipe is a small diameter pipe.

6. A bypass valve group structure of a steam valve according to claim 2, characterized in that: The drain box is arranged on the steam coming side.

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