A ball valve drain structure

Abstract

This utility model relates to a ball valve drainage structure, including a valve body. A pipe connector communicating with the valve body is fixedly installed at the bottom of the valve body. One end of a steel pipe is connected to the pipe connector, and a small ball valve is fixedly connected to the other end of the steel pipe. A drainage valve is connected to the end of the small ball valve. By adding a manual small ball valve before the drainage valve, the operator can first close the small ball valve, then open the drainage valve, and finally open the small ball valve again. This avoids the problem of the medium rushing out and contaminating the operator when the drainage valve is opened, and drainage is achieved directly by operating the small ball valve.

Description

Technical Field

[0001] This utility model belongs to the field of ball valve technology, specifically relating to a ball valve drainage structure. Background Technology

[0002] Ball valves are widely used in the oil and gas industry. A drain valve is usually designed at the bottom of the ball valve to release pressure and drain the middle cavity.

[0003] Based on long-term on-site feedback and user surveys, the following two problems were found with the drain valve at the bottom of the ball valve:

[0004] 1. When the valve diameter is large, the operator cannot reach the middle drain valve and needs to use an external lever to operate it;

[0005] 2. When draining the valve, the medium will spray out immediately when the drain valve is released, and personnel will not have time to dodge, which will cause the medium to get on the operator's body, which is unsafe. Utility Model Content

[0006] The purpose of this utility model is to provide a ball valve drain structure, which uses a pipe joint, a steel pipe and a small ball valve to lead out the drain valve and bring it close to the operator, so that the operator has enough space to operate the drain valve.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a ball valve drain structure, comprising a valve body, a pipe joint fixedly disposed at the bottom of the valve body and communicating with the valve body, one end of a steel pipe being connected to the pipe joint, a small ball valve being fixedly connected to the other end of the steel pipe, and a drain valve being connected to the end of the small ball valve.

[0008] Furthermore, the pipe fitting is fixedly mounted on the valve body by welding.

[0009] Furthermore, a bracket is fixedly installed at the bottom of the valve body, which is used to support the steel pipe.

[0010] Furthermore, the bracket is fixedly installed at the bottom of the valve body by welding.

[0011] Furthermore, the bracket has two through holes, and a U-shaped stud passes through each through hole. The U-shaped stud is installed on the bracket by a nut, and the steel pipe passes through the U-shaped stud.

[0012] Furthermore, the drain valve is fixedly connected to the small ball valve by screwing it in.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] (1) Add a manual ball valve in front of the drain valve. This way, the operator can close the ball valve first, then turn on the drain valve, and finally open the ball valve. This will prevent the medium from rushing out and contaminating the operator when the drain valve is turned on. The drain valve can be operated directly to discharge the sewage.

[0015] (2) After the drain valve is led out, the steel pipe is too long and becomes a cantilever beam structure. The steel pipe is prone to cracking of the weld when it is hit or subjected to force. Therefore, U-bolts and brackets are added to fix and support the steel pipe to avoid the above problems.

[0016] (3) By adding a pipe joint at the bottom of the main ball valve and connecting it to the drain valve, the problem of the drain valve at the bottom of the large-diameter ball valve being out of reach is solved, and the drain valve is brought to a position that is easy to operate, which makes it convenient for operators to use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall sewage discharge structure described in this utility model;

[0018] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0019] Figure 3 This is a schematic diagram of the sewage discharge structure described in this utility model from another perspective;

[0020] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0021] In the diagram: 1. Valve body; 2. Bracket; 3. Nut; 4. U-shaped stud; 5. Steel pipe; 6. Pipe fitting; 7. Small ball valve; 8. Drain valve; 9. Main ball valve; 10. Drain pipeline. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] refer to Figure 1-4As shown, the present invention provides a ball valve drainage structure, including a main ball valve 9. The main ball valve 9 has the same structure as existing ball valves and is not the structure to be protected in this application, so it will not be described in detail. The main ball valve 9 includes a valve body 1. A drainage pipe 10 communicating with the outside is provided at the bottom of the valve body 1. One end of the drainage pipe 10 is connected to the main channel inside the main ball valve 9, and the other end is connected to the drainage port opened on the surface of the valve body. In this way, wastewater in the main channel can be discharged through the drainage pipe 10 and then through the drainage port, thereby draining the main ball valve 9.

[0024] A pipe connector 6, which is connected to the sewage pipe 10, is fixedly installed at the sewage outlet on the valve body 1. Specifically, the upper radius of the pipe connector 6 is smaller than the radius of the sewage outlet, and the lower radius of the pipe connector 6 is larger than the radius of the sewage outlet. The upper end of the pipe connector is inserted into the sewage outlet. The pipe connector 6 includes an inlet that is inserted into the valve body 1 and connected to the sewage pipe 10, and an outlet that is located outside the valve body 1. A flow channel is provided between the inlet and the outlet.

[0025] The inlet of the pipe connector 6 is connected to the sewage pipe 10, and a sealing ring is provided at the connection between the inlet of the pipe connector 6 and the sewage pipe 10 to ensure that sewage does not leak from the connection gap between the sewage pipe 10 and the pipe connector 6. The upper end of the pipe connector 6 is inserted into the valve body 1, and the lower end is welded to the outer surface of the valve body 1, thus firmly fixing the pipe connector 6 to the valve body 1. Furthermore, because there is a certain distance between the sealing ring and the welding position, the welding will not damage the sealing ring.

[0026] The sewage outlet of the pipe joint 6 is connected to one end of a steel pipe 5, and the pipe joint 6 and the steel pipe 5 are welded together.

[0027] A small ball valve 7 is fixedly connected to the other end of the steel pipe 5. The small ball valve 7 has the same structure as the existing ball valve, only smaller in size than the main ball valve, so it will not be described in detail. The fluid in the steel pipe 5 can flow and be blocked through the small ball valve 7. The steel pipe 5 and the small ball valve 7 are welded together, specifically welded to the valve cover of the small ball valve 7. The steel pipe 5 is connected to the inlet of the small ball valve 7. At the same time, a drain valve 8 is connected to the outlet of the small ball valve 7. The drain valve 8 is fixed to the small ball valve 7 by screwing the drain valve 8 into the small ball valve 7. The drain valve 8 is also a commonly used component in the prior art, so it will not be described in detail.

[0028] In this embodiment, the radius of the sewage outlet of the pipe joint 6 is larger than the radius of the steel pipe 5, and the steel pipe 5 is partially inserted into the pipe joint 6 before welding.

[0029] Furthermore, a sealing ring groove is formed on the outer surface of the sewage inlet of the pipe connector 6, and the sealing ring is embedded in the sealing ring groove.

[0030] In this embodiment, in order to ensure the stability of the connection of the steel pipe 5, a bracket 2 is fixedly provided at the bottom of the valve body 1. The bracket 2 is used to support the steel pipe 5. The two ends of the bracket 2 are fixedly provided at the bottom of the valve body 1 by welding.

[0031] Meanwhile, the bracket 2 has two through holes, and a U-shaped stud passes through each of the two through holes. The U-shaped stud is installed on the bracket 2 by a nut 3 to prevent it from falling off. The steel pipe 5 passes through the U-shaped stud, thus providing support for the steel pipe 5. In addition, to ensure the stability of the support for the steel pipe 5, the U-shaped stud is welded to the steel pipe 5 at the connection point.

[0032] In practical use, when the main ball valve 9 needs to be drained, first close the small ball valve 7, then unscrew the drain valve 8, and finally stand to the side of the drain valve 8 and open the small ball valve 7 again to achieve draining.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ball valve blowdown arrangement, characterized by: The device includes a valve body, with a pipe joint fixedly installed at the bottom of the valve body, which communicates with the valve body. One end of a steel pipe is connected to the pipe joint, and a small ball valve is fixedly connected to the other end of the steel pipe. A drain valve is connected to the end of the small ball valve.

2. The ball valve blowdown structure of claim 1, wherein: The pipe joint is fixed to the valve body by welding.

3. The ball valve structure for blowdown according to claim 1, characterized by: A bracket is fixedly installed at the bottom of the valve body, and the bracket is used to support the steel pipe.

4. The ball valve blowdown structure of claim 3, wherein: The bracket is fixedly installed at the bottom of the valve body by welding.

5. The ball valve structure for blowdown according to claim 3, wherein: The bracket has two through holes, and a U-shaped stud passes through each through hole. The U-shaped stud is installed on the bracket by a nut, and the steel pipe passes through the U-shaped stud.

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