Ball valve seat with high sealing performance

Abstract

The utility model discloses a ball valve seat with high sealing performance. The ball valve seat comprises a valve body, a movable ball body is installed in the valve body, a valve rod is installed above the ball body, limiting mechanisms are arranged on the two sides of the valve body, and sealing mechanisms are arranged on the two sides of the interior of the valve body. According to the ball valve seat with the high sealing performance, through matched use of the sealing mechanism and the thrust effect of the spring, the valve seat body can make close contact with the ball body, the pre-tightening sealing effect is achieved, more reliable sealing can be formed easily when the valve body is closed through the pre-tightening sealing effect, and the leakage possibility is reduced; meanwhile, under the elastic action of the spring, tiny deformation of the sealing surface caused by temperature difference, pressure change or abrasion and the like can be compensated, the fitting degree of the sealing surface is kept, and therefore it is ensured that the valve body has high sealing performance, the elasticity of the spring can play a buffering role, impact of medium flow on the sealing surface of the valve body is reduced, and the service life of the valve body is prolonged. Therefore, the service life of the valve body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valve seats, in particular to a ball valve seat with high sealing performance. Background Technique

[0002] A ball valve is a valve widely used in pipeline systems. Its opening and closing part is driven by a valve stem and rotates around the axis of the ball valve. Due to its advantages, the ball valve is widely used in industries such as food, chemical industry, petroleum, electric power, municipal administration, and steel. In fields such as petroleum refining, long-distance pipelines, chemical industry, paper making, and pharmaceuticals, the ball valve, as an important cutting, distributing, and regulating device, plays an indispensable role. The valve seat cooperates with the ball when the valve is closed to form a sealing structure, ensuring that the fluid does not leak in the closed state. This is the most basic and important function of the valve seat.

[0003] However, in an environment with a large temperature difference, the temperature difference between the ball and the valve seat will cause the generation of thermal stress. This thermal stress may cause the ball or the valve seat to deform, thereby affecting the fit of the sealing surface and the sealing performance. Therefore, this application provides a ball valve seat with high sealing performance to meet the requirements. Summary of the Invention

[0004] The purpose of the utility model is to provide a ball valve seat with high sealing performance to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A ball valve seat with high sealing performance, including a valve body, a movable ball is installed inside the valve body, a valve stem is installed above the ball, limiting mechanisms are arranged on both sides of the valve body, and sealing mechanisms are arranged on both sides inside the valve body;

[0006] The sealing mechanism includes a mounting seat, a positioning hole, a positioning rod, a spring, a sealing outer ring, and a valve seat body. The mounting seat is installed on both sides inside the valve body. A positioning hole is opened on one side of the mounting seat. The positioning rod penetrates through the positioning hole. A spring is sleeved on the outer side of the positioning rod. One end of the positioning rod is fixed with a sealing outer ring, and a valve seat body is installed on one side of the sealing outer ring.

[0007] Preferably, the limiting mechanism includes a connecting head, a threaded groove, and a limiting shell. The connecting head is fixed on both sides of the valve body. A threaded groove is opened on the outer side of the connecting head, and a limiting shell is sleeved on the outer side of the connecting head.

[0008] Preferably, the limiting shell is threadedly connected to the connecting head through the threaded groove, and the inner side of the limiting shell is provided with a thread shape.

[0009] Preferably, the positioning holes are annularly distributed on one side of the mounting seat, and the positioning holes are aligned and penetrated with the positioning rods.

[0010] Preferably, the outer sealing ring and the mounting seat form a telescopic structure through a spring, and one side of the outer sealing ring is attached to the valve seat body.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. For this ball valve seat with high sealing performance, through the combined use of the sealing mechanism and the thrust of the spring, the valve seat body can be closely contacted with the sphere, achieving the effect of pre-tightening seal. This pre-tightening seal helps to form a more reliable seal when the valve body is closed, reducing the possibility of leakage. At the same time, under the elastic action of the spring, it can also compensate for the small deformation of the sealing surface caused by temperature difference, pressure change or wear, etc., maintaining the fit of the sealing surface, thus ensuring that the valve body has high sealing performance. Moreover, the elasticity of the spring can also play a buffering role, reducing the impact of the medium flow on the sealing surface of the valve body, thereby extending the service life of the valve body;

[0013] 2. For this ball valve seat with high sealing performance, through the setting of the limiting mechanism, the limiting shell can be conveniently rotated and installed and fixed through the thread groove, so that the limiting shell can limit the mounting seat, facilitating the removal of the mounting seat and the valve seat body from the inside of the valve body during maintenance, reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 It is a sectional view structure diagram of the valve body of the present utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the limiting mechanism of the present utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the sealing mechanism of the present utility model.

[0018] In the figure: 1, valve body; 2, sphere; 3, valve stem; 4, limiting mechanism; 401, connecting head; 402, thread groove; 403, limiting shell; 5, sealing mechanism; 501, mounting seat; 502, positioning hole; 503, positioning rod; 504, spring; 505, outer sealing ring; 506, valve seat body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-3 , the present invention provides a technical solution: a ball valve seat with high sealing performance, including a valve body 1. A movable sphere 2 is installed inside the valve body 1. A valve stem 3 is installed above the sphere 2. Limiting mechanisms 4 are arranged on both sides of the valve body 1. The limiting mechanism 4 includes a connecting head 401, a threaded groove 402, and a limiting shell 403. The connecting head 401 is fixed on both sides of the valve body 1. A threaded groove 402 is formed on the outer side of the connecting head 401. A limiting shell 403 is sleeved on the outer side of the connecting head 401, which is convenient for removing the mounting seat 501 and the valve seat body 506 from the inside of the valve body 1 during maintenance, reducing the maintenance cost. The limiting shell 403 is threadedly connected to the connecting head 401 through the threaded groove 402. The inner side of the limiting shell 403 is provided with a thread. The limiting shell 403 can be rotatably installed and fixed through the threaded groove 402, so that the limiting shell 403 can limit the mounting seat 501. Sealing mechanisms 5 are arranged on both sides inside the valve body 1;

[0021] Please refer to Figure 2 and Figure 4 , the sealing mechanism 5 includes a mounting seat 501, a positioning hole 502, a positioning rod 503, a spring 504, a sealing outer ring 505, and a valve seat body 506. The mounting seat 501 is installed on both sides inside the valve body 1. A positioning hole 502 is formed on one side of the mounting seat 501. A positioning rod 503 penetrates through the positioning hole 502. The positioning holes 502 are annularly distributed on one side of the mounting seat 501. The positioning holes 502 are aligned and penetrated by the positioning rods 503. The sealing outer ring 505 is limited and guided through the positioning holes 502 and the positioning rods 503, improving the stability of the sealing outer ring 505. A spring 504 is sleeved on the outer side of the positioning rod 503. One end of the positioning rod 503 is fixed with a sealing outer ring 505. A valve seat body 506 is installed on one side of the sealing outer ring 505. The sealing outer ring 505 forms a telescopic structure with the mounting seat 501 through the spring 504. One side of the sealing outer ring 505 is in contact with the valve seat body 506. Through the thrust of the spring 504, the valve seat body 506 can be in close contact with the sphere 2, achieving the effect of pre-tightening seal. This pre-tightening seal helps to form a more reliable seal when the valve body 1 is closed, reducing the possibility of leakage. At the same time, under the elastic action of the spring 504, it can also compensate for the slight deformation of the sealing surface caused by temperature difference, pressure change, wear, etc., maintaining the fitting degree of the sealing surface, thereby ensuring that the valve body 1 has high sealing performance.

[0022] Working principle: When using the ball valve seat with high sealing performance, first, during use, the limiting shell 403 is rotated and sleeved on both sides of the valve body 1 to limit the mounting seat 501. Secondly, under the thrust of the spring 504, the valve seat body 506 can be in close contact with the ball 2 to achieve the effect of pre-tightening seal. Under the elastic action of the spring 504, it can also compensate for the slight deformation of the sealing surface caused by reasons such as temperature difference, pressure change or wear, and maintain the fitting degree of the sealing surface. Finally, during maintenance, the limiting shell 403 can be quickly removed, and the mounting seat 501 and the valve seat body 506 can be taken out from the inside of the valve body 1, reducing the maintenance cost. Just like this, the use process of the ball valve seat with high sealing performance is completed.

[0023] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ball valve seat with high sealing performance, comprising a valve body (1), characterized in that: A movable sphere (2) is installed inside the valve body (1), a valve stem (3) is installed above the sphere (2), limiting mechanisms (4) are arranged on both sides of the valve body (1), and sealing mechanisms (5) are arranged on both sides inside the valve body (1); The sealing mechanism (5) includes a mounting seat (501), a positioning hole (502), a positioning rod (503), a spring (504), a sealing outer ring (505) and a valve seat body (506). The mounting seat (501) is installed on both sides inside the valve body (1). A positioning hole (502) is formed on one side of the mounting seat (501). A positioning rod (503) penetrates through the positioning hole (502). A spring (504) is sleeved on the outer side of the positioning rod (503). One end of the positioning rod (503) is fixed with a sealing outer ring (505). A valve seat body (506) is installed on one side of the sealing outer ring (505).

2. The ball valve seat with high sealing performance according to claim 1, characterized in that, The limiting mechanism (4) includes a connecting head (401), a threaded groove (402) and a limiting shell (403). The connecting head (401) is fixed on both sides of the valve body (1). A threaded groove (402) is formed on the outer side of the connecting head (401). A limiting shell (403) is sleeved on the outer side of the connecting head (401).

3. The ball valve seat with high sealing performance according to claim 2, characterized in that, The limiting shell (403) is threadedly connected with the connecting head (401) through the threaded groove (402), and the inner side of the limiting shell (403) is arranged in a threaded shape.

4. A ball valve seat with high sealing performance according to claim 1, characterized in that, The positioning holes (502) are annularly distributed on one side of the mounting seat (501), and the positioning holes (502) are aligned and penetrated by the positioning rods (503).

5. A ball valve seat with high sealing performance according to claim 1, characterized in that, The sealing outer ring (505) and the mounting seat (501) form a telescopic structure through the spring (504), and one side of the sealing outer ring (505) is attached to the valve seat body (506).

Images