Contraction band anti-interference gate valve

Abstract

The invention provides a contraction band anti-interference gate valve. The contraction band anti-interference gate valve has the advantages of being capable of realized automatic fine adjustment of the connection length, capable of being conveniently connected to pipes with different pipe diameters and easy to install. The contraction band anti-interference gate valve comprises a valve body, a valve deck, a valve rod, an opening and closing part and an opening device, wherein the valve body is provided with with a hollow fluid channel; the valve body is provided with an inlet, an outlet and an upper valve port; the valve deck is arranged at the upper valve port in the valve body; a valve seat is further arranged between the inlet and the outlet in the valve body; the opening and closing part is arranged on the valve seat and is used for controlling the on-off states of fluid; the valve rod penetrates through the valve body and is used for controlling opening and closing of the openingand closing part; a connecting pipe capable of spirally sliding relative to the valve body is arranged at the inlet or the outlet of the valve body in a sleeved mode; a sealing device and a connecting pipe limiting device for preventing the connecting pipe from falling off from the valve body are arranged between the connecting pipe and the inlet or the outlet; a quick dismounting and mounting structure is arranged between the connecting pipe and the valve body; and a rolling device capable of enabling the connecting pipe to spirally slide along the valve body is further arranged between theconnecting pipe and the valve body.

Description

technical field [0001] The invention relates to the technical field of valves for controlling fluid on-off, in particular to a telescopic anti-interference gate valve. Background technique [0002] At present, tap water users in towns and cities usually install water meters on the tap water pipelines in order to measure their water consumption; in order to prevent the loss of water resources caused by tap water leakage, a shut-off gate valve is usually installed in front of the user's water meter as a regulating and shut-off device; Prevent the reverse flow of the medium from affecting the measurement of the user's water meter and causing confusion to the management of water resources. [0003] As shown in Figure 2, Chinese Patent No. 201120323528.4 discloses a union one-way gate valve, including a valve body 1, a valve cover 2, an opening and closing member 3, a valve stem 4 and an opening device, and the valve cover 2 is arranged above the valve body 1 , the valve cover 2...

AI Technical Summary

Problems solved by technology

[0004] 1. The specifications of the water meter have different sizes, but the size of the ports on both sides of the control valve is fixed. In order to connect water meters of different sizes, it is necessary to find a transitional connecting pipe. The connection is very cumbersome, and the more joints, the more likely to leak The phenomenon;

[0005] 2. The above-mentioned control valve and the water meter are all threaded connections. In order to prevent water leakage, raw material tapes will be wrapped around the threaded connections to prevent water leakage. However, such connections are very troublesome. For inexperienced people, often You will encounter the problem of not knowing how much raw material tape to wrap, and this connection method also has the problem that the raw material tape is easy to rot after a long time, and the threaded connection is easy to rust when soaked in water;

[0006] 3. When the control valve or pipeline is maintained, because the pipeline material has the phenomenon of thermal expansion and cold contraction, after long-term use, the original pipeline length will change a little bit, but the size of the control valve is fixed, and the replacement It is easy to appear the phenomenon of size mismatch;

[0007] 4. When there is a pipe burst and needs to be cut and reconnected, since the length of the control valve is fixed here, a short pipe must be connected to the pipe, which brings great inconvenience to the maintenance of the pipe.

[0008] 5. During installation, it is often encountered that the length of the pipeline is reserved a little more or a little less, which is very inconvenient for installation and maintenance, and the flexibility of use is poor, which brings convenience to the work of construction personnel

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