CN204610935U - Twoly diffuse plastic valve - Google Patents

Abstract

The utility model relates to a double release type plastic valve, which is provided with a valve body, the two ends of the valve body are respectively provided with end pipes, the valve body is provided with a valve core cavity and a valve stem cavity, and the valve core cavity is equipped with There is a spherical valve core, a valve seat is arranged outside the valve core, a valve seat sealing ring is arranged on the valve seat, a valve stem is connected to the valve core, and a multi-layer valve stem sealing ring is arranged in the valve stem cavity , the top of the valve stem is equipped with an operating cap, the valve stem cavity is provided with an operating cap sealing ring outside, and the end pipes are all provided with a release pipe joint. The utility model is suitable for natural gas valves and has the advantages of high sealing performance, acid and alkali resistance, long service life, reduced maintenance rate and improved production efficiency.

Description

Double relief plastic valve

technical field

The utility model belongs to a valve, in particular to a plastic valve for natural gas.

Background technique

There are many kinds of pipeline valves, each valve manufacturing material is mainly divided into ordinary cast steel, alloy steel, non-ferrous metal, PE polyethylene plastic and so on. Existing PE valves are mainly sealed by balls, which use spherical surface seals. The 10-inch precision requirements are high, and the processing of plastic balls is quite difficult, especially for the production of large and medium-sized valves, and rubber gaskets are used outside the balls. Rubber gaskets There are disadvantages such as aging and strain, which reduce the overall service life of the valve to a certain extent.

With the development of science and technology, the emergence of PE plastic steel wire reinforced pipes, steel mesh reinforced pipes and the application of electrofusion pipe fittings in natural gas pipelines have put forward higher service life requirements for the application of valves in pipelines. Traditional steel and alloy steel valves are in use for 3-5 years at most, and as short as 1-2 years, they will be scrapped and replaced due to corrosion and other reasons. Although the service life of non-ferrous metal valves has been improved, the price of non-ferrous metals is expensive.

Utility model content

The purpose of this utility model is to solve the above problems and propose a double release plastic valve, which has the characteristics of high sealing performance, acid resistance, alkali resistance, long service life, reduced maintenance rate, and improved production efficiency. .

The purpose of this utility model is achieved through the following technical solutions: a double release plastic valve is provided with a valve body, which is characterized in that: the two ends of the valve body are respectively provided with end pipes, and the valve body is provided with a valve core cavity , valve stem cavity, a spherical valve core is arranged in the valve core cavity, a valve seat is arranged outside the valve core, a valve seat sealing ring is arranged on the valve seat, and a valve stem is connected to the valve core, so A multi-layer valve stem sealing ring is arranged in the valve stem chamber, an operating cap is installed on the top of the valve stem, an operating cap sealing ring is arranged on the outside of the valve stem chamber, and a release pipe joint is arranged on the end pipes. An elongated sleeve is arranged outside the valve rod cavity, and an elongated operating rod is connected to the operating cap, and an operating knob is arranged at the top of the operating rod.

An extended pipeline is added to the release pipe joint, and a valve that can be rotated and opened is arranged at the end of the pipeline.

The sleeve is provided with a fixing frame.

When the valve of the utility model is connected with the pipeline, an electric fusion pipe welding machine is used to energize the two poles of the winding, and the low-carbon steel heating wire is heated by the current to melt the plastic on the contact surface of the PE pipeline valve and the PE plastic pipe, so that the valve and the pipeline are fused and welded. The utility model has the advantages of:

1. Increase the service life of the valve, which can be the same as the life of the pipeline;

2. Reduce construction difficulty, improve construction efficiency, save installation cost and reduce failure rate;

3. The components are reduced, and the space of the valve in the pipeline can be relatively reduced;

4. The sealing is more thorough, the processing difficulty is low, and it is more suitable for the production and use of large and medium-sized valves.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is a schematic diagram of the internal structure of the utility model;

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further:

Embodiment: Refer to accompanying drawings 1 and 2, a double release type plastic valve is provided with a valve body 1, the two ends of the valve body are respectively provided with end pipes 2, and the valve body is provided with a valve core cavity and a valve stem cavity. A spherical valve core 3 is arranged in the cavity of the valve core, a valve seat 4 is arranged outside the valve core, a valve seat sealing ring 5 is arranged on the valve seat, a valve stem 6 is connected to the valve core, and a valve stem 6 is connected to the valve core. A multi-layer valve stem sealing ring 7 is arranged in the stem cavity, an operating cap 9 is installed on the top of the valve stem, an operating cap sealing ring 8 is arranged on the outside of the valve stem cavity, and a release pipe joint 10 is provided on the end pipes. , an extended sleeve 11 is arranged outside the valve stem cavity, an extended operating rod 12 is connected to the operating cap, and an operating knob 13 is arranged at the top of the operating rod; an extended pipe is added to the release pipe joint 14. A rotatable valve 15 is provided at the end of the pipeline; a fixing frame 16 is provided on the sleeve.

Finally, it should be noted that obviously, the above-mentioned embodiments are only examples for clearly illustrating the utility model, rather than limiting the implementation manner. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the protection scope of the present utility model.

Claims (3)

1. one kind pair is diffused plastic valve, be provided with valve body (1), it is characterized in that: described valve body two ends are respectively equipped with end pipe (2), spool chamber is provided with in described valve body, valve-rod cavity, spherical spool (3) is provided with in described spool chamber, described spool is outside equipped with valve seat (4), described valve seat is provided with valve seat insert (5), described spool is connected with a valve rod (6), multilayer valve stem packing ring (7) is set in described valve-rod cavity, described valve stem tip is provided with operation cap (9), described valve-rod cavity is provided with operation cap seal ring (8) in outside, described end pipe is provided with exhaust stack joint (10), the sleeve (11) of one lengthening is set outside described valve-rod cavity, described operation cap connects an operating stem (12) lengthened, described operating stem arranges an operation knob (13) on top.

2. according to claim 1 pair is diffused plastic valve, and it is characterized in that: described exhaust stack joint adds the pipeline (14) being connected to a lengthening, the end of described pipeline is provided with the valve (15) of rotatable unlatching.

3. according to claim 1 pair is diffused plastic valve, it is characterized in that: described sleeve is provided with fixing frame (16).