CN205559848U - Ball valve seals up disk seat - Google Patents

Abstract

The utility model relates to the technical field of ball valves, in particular to a sealed valve seat of a ball valve, which includes a valve core, a valve seat, a valve body, a valve seat bracket, a spring and a retaining ring. The valve core and the valve seat bracket are installed between the valve body and the valve seat, and the spring top is installed between the valve seat and the retaining ring. The sealing valve seat of a ball valve of the utility model reduces the sealing specific pressure between the valve seat and the valve core by adding a valve seat bracket between the valve seat and the valve body; The boss is set to transfer the medium force acting on the valve seat bracket to the valve body, so that the medium force acting on the valve seat is reduced, and at the same time the friction between the valve seat and the valve core is reduced to achieve more effective The sealing effect reduces the moment of opening and closing of the valve and reduces the cost of use of the transmission device.

Description

A ball valve sealing seat

technical field

The utility model relates to the technical field of ball valves, in particular to a ball valve sealing seat.

Background technique

Ball valve is a very commonly used technology, often used in petroleum refining, long-distance pipeline, chemical industry, papermaking, pharmaceutical, water conservancy, electric power, municipal, steel and other industries, to cut off or connect the medium in the pipeline.

The sealing principle of the ball valve is mainly to install a spool inside the valve body. When the valve is in the open state, the through hole in the middle of the spool communicates with the inlet and outlet at both ends of the valve body to form a pipeline. When closing, it only needs to drive the valve core to rotate 90° through the valve stem, and use the spherical surface of the valve core to close the pipeline. In order to prevent internal leakage of the valve, the valve seat and the spherical surface of the valve core form a sealing surface. Therefore, the seal between the valve seat and the valve core is very important, but in the cooperative use of the valve seat and the valve core, a spring is arranged behind the valve seat, and the compression and pretightening force of the spring can ensure that the valve seat and the valve core of the ball valve are tight. It can be tightly fitted and sealed, but sometimes due to the increased pressure of the medium acting on the valve seat, the friction between the valve seat and the valve core increases, resulting in an increase in the torque when opening or closing the valve, which affects the performance of the transmission device. The requirements are raised and the cost of use is increased.

Utility model content

The technical problem to be solved by the utility model is: in order to solve the technical problems such as the large area of the existing valve seat subjected to the medium pressure, which causes the friction force between the valve seat and the valve core to increase, and the cost of the transmission device to increase, the utility model provides a ball valve Seal the valve seat to achieve the purpose of reducing the sealing specific pressure and reducing the cost of use.

The technical solution adopted by the utility model to solve the technical problem is: a ball valve sealing valve seat, including a valve core, a valve seat, a valve body, a valve seat bracket, a spring and a retaining ring, the valve seat is installed in the valve body, and the valve seat The inner coaxial rotation is installed with a valve core, the valve seat bracket is installed between the valve body and the valve seat, the retainer is installed in the valve body, the retainer fits the outer end surface of the valve seat bracket, and the spring top is mounted on the Between the valve seat and the retaining ring, the valve seat is closely attached to the valve core by the elastic force of the spring, the inner wall of the valve seat bracket is in sealing connection with the outer wall of the valve seat, and the outer wall of the valve seat bracket is in sealing connection with the inner wall of the valve body. The utility model reduces the sealing specific pressure between the valve seat and the valve core by adding a valve seat bracket between the valve seat and the valve body.

Further, the specific sealing connection structure is as follows: the outer wall of the valve seat fits with the valve seat bracket, and a circumferential valve seat groove is opened at the joint where the outer wall of the valve seat and the inner wall of the valve seat bracket fit, and the valve seat A circumferential valve seat support groove is formed at the joint between the outer wall of the support and the inner wall of the valve, and sealing rings are installed in the valve seat support groove and the valve seat groove. The number of valve seat bracket grooves and valve seat grooves can be set according to needs.

In order to transfer the medium force on the valve seat bracket to the valve body, as a preference, the outer wall of the valve seat bracket is provided with an integral structure boss near the outer end surface of the valve seat bracket, and the inner wall of the valve body is provided with a step surface, the outer end surface of the boss is on the same surface as the outer end surface of the valve seat bracket, and the inner end surface of the boss fits with the stepped surface. The setting of the boss can transfer the medium force acting on the valve seat bracket to the valve body, so as to reduce the medium force acting on the valve seat, and at the same time reduce the friction between the valve seat and the valve core to achieve more effective The ground sealing effect reduces the torque of the valve opening and closing and reduces the cost of the transmission device.

The beneficial effect of the utility model is that the sealing valve seat of a ball valve of the utility model reduces the sealing specific pressure between the valve seat and the valve core by adding a valve seat bracket between the valve seat and the valve body; A boss is set at the connection between the seat bracket and the valve body, which transfers the medium force acting on the valve seat bracket to the valve body, reduces the medium force acting on the valve seat, and at the same time reduces the distance between the valve seat and the valve core. The friction force achieves a more effective sealing effect, which reduces the torque of the valve opening and closing and reduces the cost of the transmission device.

Description of drawings

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

Fig. 1 is a schematic structural view of the most preferred embodiment of the utility model.

Fig. 2 is an enlarged view of A in Fig. 1 .

In the figure: 1. Retaining ring, 2. Spring, 3. Valve seat, 4. Valve seat bracket, 41. Boss, 5. Valve body, 51. Step surface, 6. Valve seat bracket groove, 7. Valve seat Groove, 8, spool.

detailed description

Now in conjunction with accompanying drawing, the utility model is described in further detail. These drawings are all simplified schematic diagrams, and only schematically illustrate the basic structure of the utility model, so they only show the configurations related to the utility model.

As shown in Figures 1 and 2, it is the best embodiment of the utility model, a ball valve sealing valve seat, including a valve core 8, a valve seat 3, a valve body 5, a valve seat bracket 4, a spring 2 and a retainer 1, the valve The valve seat 3 is installed in the body 5, the valve core 8 is installed coaxially rotating in the valve seat 3, the valve seat bracket 4 is installed between the valve body 5 and the valve seat 3, the retainer 1 is installed in the valve body 5, and the spring 2 tops Installed between the valve seat 3 and the retainer 1, the valve seat 3 is closely attached to the valve core 8 through the elastic force of the spring 2, the retainer 1 is attached to the outer end surface of the valve seat bracket 4, and the inner wall of the valve seat bracket 4 is in contact with the valve core 8. The outer wall of the valve seat 3 is in sealing connection, and the outer wall of the valve seat bracket 4 is in sealing connection with the inner wall of the valve body 5 .

The outer wall of the valve seat 3 fits with the valve seat bracket 4, and there are two circumferential valve seat grooves 7 at the joint between the outer wall of the valve seat 3 and the inner wall of the valve seat bracket 4, and the outer wall of the valve seat bracket 4 and the valve Two rings of circumferential valve seat support grooves 6 are provided at the joint of the inner walls of the body 5, and O-rings are installed in the valve seat support groove 6 and the valve seat groove 7.

The outer wall of the valve seat bracket 4 is provided with a boss 41 of an integral structure near the outer end surface of the valve seat bracket 4 , and the inner wall of the valve body 5 is provided with a step surface 51 , and the outer end surface of the boss 41 and the outer end surface of the valve seat bracket 4 On the same surface, the inner end surface of the boss 41 is in contact with the stepped surface 51 .

A ball valve sealing seat of this embodiment, a boss 41 is provided on the seat bracket 4, which can transfer the medium force acting on the valve seat bracket 4 to the valve body 5, so that the medium acting on the valve seat 3 The force is reduced, and the friction force between the valve seat 3 and the valve core 8 is reduced at the same time, so as to achieve a more effective sealing effect, reduce the torque for opening and closing the valve, and reduce the use cost of the transmission device.

Inspired by the above-mentioned ideal embodiment according to the utility model, and through the above-mentioned description content, relevant staff can completely make various changes and modifications within the scope of not deviating from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.

Claims (3)

1. a ball valve sealing valve seat, it is characterised in that: include spool (8), valve seat (3), valve body (5), Valve seat support (4), spring (2) and guard ring (1), install valve seat (3), valve seat in described valve body (5) (3) rotating coaxially in and be provided with spool (8), described valve seat support (4) is arranged on valve body (5) and valve seat (3) between, described guard ring (1) is arranged in valve body (5), guard ring (1) and valve seat support (4) Outer face fits, and spring (2) top is contained between valve seat (3) and guard ring (1), and valve seat (3) passes through The elastic force of spring (2) fits tightly with spool (8), the inwall of valve seat support (4) and valve seat (3) Outer wall is tightly connected, and the outer wall of valve seat support (4) is connected with the inner wall sealing of valve body (5).

2. a kind of ball valve sealing valve seat as claimed in claim 1, it is characterised in that: described valve seat (3) Outer wall fit with valve seat support (4), the inwall phase of described valve seat (3) outer wall and valve seat support (4) Joint place offers the valve seat groove (7) of circumference, the outer wall of valve seat support (4) and valve body (5) inwall phase Joint place offers valve seat support groove (6) of circumference, described valve seat support groove (6) and valve seat groove (7) Inside it is mounted on sealing ring.

3. a kind of ball valve sealing valve seat as claimed in claim 1, it is characterised in that: described valve seat support (4) Outer wall at the outer face of valve seat support (4), be provided with the boss (41) of integrative-structure, valve body (5) Inwall be provided with step surface (51), the outer face of boss (41) exists with the outer face of valve seat support (4) On the same face, the inner face of boss (41) fits with step surface (51).