CN203431244U - Three-way ball valve with sealing pre-tightening amount compensation function - Google Patents

Abstract

This utility model discloses a three-way ball valve with pre-tightening compensation, including a valve seat, a valve body, a three-way valve body, and a ball disposed within the three-way valve body. The three-way valve body is connected to the valve body via a flange gasket and connected to the valve seat via a sealing ring. Sealing rings are provided between the three channel ports of the three-way valve body and the ball. A side-opening protrusion is provided at the bottom of the three-way valve body, and a left-handed screw is disposed within the side-opening protrusion. The left-handed screw is screwed tightly to the packing gland via an internal thread. An anti-static device is provided between the left-handed screw, the three-way valve body, and the valve seat. The advantages of this utility model are: simple manufacturing process, convenient assembly, long-term reliable use of the ball valve, long service life, good stability, good sealing performance, and excellent static electricity conduction, avoiding safety hazards to the ball valve and the medium caused by static electricity.

Description

A Three-way Ball Valve with Sealing Pretightening Compensation

technical field

The utility model relates to the field of pipelines, in particular to a three-way ball valve with sealing pretightening amount compensation.

Background technique

In the pipeline field system, gate valves, globe valves and ball valves are the three most widely used valves, and their shortcomings also have their own advantages. However, ordinary ball valves are prone to fluid residue and poor sealing performance due to the large fit gap and insufficient sealing performance during use. Leakage will have a certain impact on the service life of the valve body and the three-way ball valve in the ball valve has a complex structure and troublesome assembly. After a period of use, problems are more likely to occur, and there is no static conductive device, which is prone to ignition due to static electricity medium accident.

Utility model content

The technical problem to be solved by the utility model is to provide a three-way ball valve with sealing pretightening amount compensation for the deficiencies of the prior art.

In order to achieve the above object, the measures taken by the utility model:

A three-way ball valve with sealing pretightening compensation, comprising a valve seat, a valve body, a three-way valve body and a ball arranged in the valve body, the three-way valve body is connected with the valve body through a flange gasket, and the three-way The valve body is connected with the valve seat through the sealing ring 1. The three channel ports of the inner cavity of the three-way valve and the ball are all provided with sealing rings. There is a left-handed screw in the convex hole, and the left-handed screw is tightly connected with the packing gland through internal threads. An anti-static device is installed between the left-handed screw, the three-way valve body and the valve seat, and the inner wall of the three-way valve is coated with There is an anti-corrosion layer, the mouth of the valve body is provided with a filter screen, and a bellows is connected to the convex hole.

A PTFE gasket is provided between the side opening convex hole and the left-handed screw, and the PTFE gasket is arranged in the stuffing box of the side opening convex hole and connected with the packing gland;

The sphere is a three-way sphere;

The anti-static device is a conductive spring;

A handle is connected to the top of the left-handed screw, and a limiting piece is provided between the handle and the left-handed screw.

The ball has an S-shaped channel in the horizontal direction, and when the valve is opened, the buffer force is smaller.

There are rollers on the valve seat, and a handle on the top of the valve body, which is convenient for moving the valve.

Beneficial effects of the utility model: the utility model has the advantages of simple production process, convenient assembly, long-term and reliable use of the ball valve, long service life, good stability, good sealing performance, good static conduction, and avoiding the impact of static electricity on the ball valve and the medium. safety hazards.

Description of drawings

Fig. 1, the front sectional view of structure of the present utility model.

Fig. 2, the top sectional view of the utility model structure.

Detailed ways

As shown in Figure 1-Figure 2, a three-way ball valve with sealing pretightening amount compensation includes a valve seat, a three-way valve body 2, a valve body 1 and a ball 4 arranged in the three-way valve body, the three-way valve body There are sealing rings between the three channel ports of the cavity and the ball 4, the three-way valve body 2 is connected with the valve body 1 through the flange gasket 5, the valve body 1 is connected with the valve seat through the sealing ring 1, and the three-way The bottom of the inner cavity of the valve body 2 is provided with a side-opening convex hole 3, and a left-handed screw 6 is arranged in the side-opening convex hole 3 through a PTFE gasket. For the three-way ball, the PTFE gasket is installed in the stuffing box with a convex hole on the side, and the packing gland is tightly installed to act as a packing seal. A conductive spring 8 is arranged between the left-hand screw 6, the valve body and the valve seat disc, so that The left-handed screw 6 described above adopts a built-in type, with a shoulder at the end of the screw and a washer plus a spring thrust structure to prevent the screw from coming out due to pipeline pressure. Limited slice 10.

Simple modifications and replacements by those skilled in the art are within the protection scope of the present utility model.

Claims (7)

1. A three-way ball valve with sealing and pretightening compensation, comprising a valve seat, a valve body, a three-way valve body and a sphere located in the three-way valve body, characterized in that: the three-way valve body passes through the flange gasket It is connected with the valve body, and the three-way valve body is connected with the valve seat through the sealing ring one. The three channel ports of the inner cavity of the three-way valve and the ball are all provided with sealing rings, and the bottom end of the inner cavity of the three-way valve There is a side-opening convex hole, and a left-handed screw is arranged in the side-opening convex hole, and the left-handed screw and the packing gland are tightly connected by internal threads, and an anti-static device is installed between the left-handed screw and the three-way valve body and the valve seat , The inner wall of the three-way valve is coated with an anti-corrosion layer, the mouth of the valve body is provided with a filter screen, and a bellows is connected to the convex hole. 2. The sealing preload compensation three-way ball valve according to claim 1, characterized in that: there is a PTFE gasket between the convex hole of the side opening and the left-hand screw, and the PTFE gasket is arranged on the side opening. Inside the stuffing box with convex hole and connected with the stuffing gland. 3. The three-way ball valve with sealing pretightening amount compensation according to claim 2, characterized in that: said ball is a three-way ball. 4. The three-way ball valve with sealing preload compensation according to claim 3, characterized in that: said anti-static device is a conductive spring. 5. The three-way ball valve with sealing pretightening amount compensation according to any one of claims 1-4, characterized in that: a handle is connected to the top of the left-handed screw, and a limiting plate is provided between the handle and the left-handed screw. 6. The three-way ball valve with sealing pretightening amount compensation according to claim 5, characterized in that: the ball is provided with an S-shaped passage in the transverse direction. 7. The three-way ball valve with sealing pretightening amount compensation according to claim 6, characterized in that: the valve seat is provided with rollers.

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