Valve seat structure of ball valve

Abstract

The utility model relates to the technical field of ball valve seats, in particular to a ball valve seat structure which comprises an installation seat, an auxiliary mechanism is arranged on the inner wall of the installation seat, an installation groove is formed in the top end of the installation seat, a fixing groove is formed in the inner wall of the installation groove, and a fixing ring is connected to the inner wall of the fixing groove in an inserted mode. A first bearing ring is fixedly mounted at the top end of the fixing ring, and a first sealing ring is fixedly mounted on the inner wall of the first bearing ring. By arranging the auxiliary mechanism, when the first sealing ring is damaged, the auxiliary mechanism can be started to seal the ball valve, the operation reliability and safety of a key pipeline system are remarkably improved, the first sealing ring and the second sealing ring are arranged, and the first sealing ring and the second sealing ring are both made of polyimide materials, so that the service life of the ball valve is prolonged. The material obviously prolongs the service life of a sealing system.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve seat technical field especially relates to a ball valve seat structure. BACKGROUND

[0002] Ball valve seat is the key component of ball valve, and cooperates with the ball to realize sealing function. It has various structural types, such as fixed valve seat, floating valve seat, and is divided into soft sealing and hard sealing in material. The design of valve seat directly affects the sealing property, temperature resistance and pressure resistance and service life of ball valve.

[0003] Ball valve is widely used in various industrial pipeline systems, and the sealing performance of its valve seat directly affects the operation reliability and safety of the whole pipeline system. The existing ball valve seat structure mostly relies on a single sealing ring to realize sealing, when the sealing ring is damaged, the ball valve will leak, which leads to the failure of the pipeline system to operate normally, and even may cause safety accidents. Moreover, the service life of the sealing ring made of ordinary sealing material is limited, which increases the maintenance cost and downtime. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the above-mentioned shortcomings in prior art and provides a ball valve seat structure.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A ball valve seat structure is designed, which comprises a mounting seat, the inner wall of the mounting seat is provided with an auxiliary mechanism, the top end of the mounting seat is provided with a mounting groove, the inner wall of the mounting groove is provided with a fixing groove, the inner wall of the fixing groove is inserted with a fixing ring, the top end of the fixing ring is fixedly provided with a first receiving ring, and the inner wall of the first receiving ring is fixedly provided with a first sealing ring.

[0007] The auxiliary mechanism comprises a cavity, the cavity is arranged on the inner wall of the mounting seat, the inner wall of the cavity is rotatably connected with a rotating rod through a bearing, the rotating rod is provided with threads, the rotating rod is threadedly connected with a lifting rod, the inner wall of the mounting seat is provided with a limiting sliding groove, the limiting sliding groove is communicated with the cavity, the lifting rod slides on the inner wall of the cavity, the top end of the lifting rod is fixedly provided with a second receiving ring, the second receiving ring slides on the inner wall of the mounting seat, and the inner wall of the second receiving ring is fixedly provided with a second sealing ring.

[0008] Further, the shape of the fixing groove is a circular ring, the shape of the fixing ring is a circular ring, and the inner ring of the fixing groove is matched with the fixing ring.

[0009] Further, the shape of the first receiving ring is a circular ring, and the inner wall of the first receiving ring is a circular arc.

[0010] Further, the first sealing ring is circular in shape and is made of polyimide.

[0011] Further, the cavity is square in shape and the lifting rod is L-shaped.

[0012] Further, the inner wall of the cavity is fixedly provided with a motor, and the rotating shaft end of the motor is fixedly connected with one end of the rotating rod.

[0013] Further, the second sealing ring is circular in shape and is made of polyimide.

[0014] The ball valve seat structure has the beneficial effects that: when the first sealing ring is damaged, the auxiliary mechanism can be used to seal the ball valve, the operation reliability and safety of the key pipeline system are significantly improved, the first sealing ring and the second sealing ring are made of polyimide material, and the service life of the sealing system is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the fixed ring of the utility model;

[0017] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0018] Figure 4 It is an enlarged view of A of the utility model.

[0019] In the figure: 1, mounting seat; 21, second receiving ring; 22, second sealing ring; 23, rotating rod; 24, cavity; 25, motor; 26, limiting sliding groove; 27, lifting rod; 3, first receiving ring; 4, fixed groove; 5, first sealing ring; 6, fixed ring; 7, mounting groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0021] REFERENCE Figures 1-4The utility model provides a ball valve seat structure, including the mounting seat 1, the inner wall of mounting seat 1 is provided with auxiliary mechanism, by setting up auxiliary mechanism, when the first sealing ring 5 is damaged, can enable auxiliary mechanism, and the ball valve is sealed, significantly improve the operation reliability and security of key pipeline system, the top of mounting seat 1 is provided with installation groove 7, the setting of installation groove 7 is used for the insertion of first receiving ring 3, the inner wall of installation groove 7 is provided with fixed groove 4, the setting of fixed groove 4 is used for the insertion of fixed ring 6, the inner wall of fixed groove 4 is inserted with fixed ring 6, and fixed ring 6 is made of elastic rubber, by setting up fixed ring 6 and fixed groove 4, first receiving ring 3 is convenient to disassemble, so as to disassemble and replace the first sealing ring 5 of the inner wall of first receiving ring 3, the top of fixed ring 6 is fixedly installed with first receiving ring 3, and the inner wall of first receiving ring 3 is fixedly installed with first sealing ring 5, and first sealing ring 5 is used to contact with the inner ball of ball valve, to realize the purpose of sealing;

[0022] The auxiliary mechanism includes a cavity 24, which is formed in the inner wall of the mounting seat 1. The cavity 24 is arranged to accommodate the installation of the rotating rod 23. The inner wall of the cavity 24 is rotatably connected with the rotating rod 23 through a bearing. The rotating rod 23 is provided with a thread. The rotating rod 23 with the thread is arranged to drive the vertical movement of the lifting rod 27 along the inner wall of the limiting sliding groove 26. The rotating rod 23 is threadedly connected with the lifting rod 27. The lifting rod 27 is arranged to accommodate the installation of the second receiving ring 21. The inner wall of the mounting seat 1 is provided with the limiting sliding groove 26, which is in the shape of a square through groove. The limiting sliding groove 26 is arranged to accommodate the sliding of the lifting rod 27. The limiting sliding groove 26 is communicated with the cavity 24. The lifting rod 27 slides in the inner wall of the cavity 24. The top of the lifting rod 27 is fixedly installed with the second receiving ring 21. The second receiving ring 21 is arranged to accommodate the installation of the second sealing ring 22. The second receiving ring 21 slides in the inner wall of the mounting seat 1. The inner wall of the second receiving ring 21 is fixedly installed with the second sealing ring 22. When the first sealing ring 5 is damaged and cannot realize sealing, the second sealing ring 22 is arranged to assist in contacting with the inner ball of the ball valve, so as to realize the purpose of sealing, thereby improving the safety of the ball valve.

[0023] In detail, the fixed groove 4 is in the shape of a circular ring, and the fixed ring 6 is also in the shape of a circular ring. The inner ring of the fixed groove 4 is matched with the fixed ring 6. By arranging the fixed ring 6 and the fixed groove 4, the first receiving ring 3 can be conveniently disassembled, so as to disassemble and replace the first sealing ring 5 in the inner wall of the first receiving ring 3.

[0024] Further, the first receiving ring 3 is in the shape of a circular ring, and the inner wall of the first receiving ring 3 is in the shape of a circular arc. The first receiving ring 3 is arranged to accommodate the installation of the first sealing ring 5.

[0025] Further, the first sealing ring 5 is circular in shape and is made of polyimide. Polyimide has unique performance advantages under extreme working conditions. This high-performance polymer has excellent temperature resistance and mechanical strength, can adapt to a wide temperature range from ultra-low temperature to ultra-high temperature, and is particularly suitable for harsh application scenarios such as aerospace and semiconductors. Its excellent tensile strength and wear resistance enable it to withstand high-pressure working conditions and particle-containing medium erosion while maintaining stable sealing effect. In terms of chemical stability, polyimide performs well and can resist corrosion from most strong acids, strong bases, and organic solvents. The first sealing ring 5 is provided to contact the inner ball of the ball valve to achieve sealing.

[0026] In more detail, the cavity 24 is square in shape and is provided to accommodate the installation of the rotating rod 23. The lifting rod 27 is L-shaped.

[0027] In general, the inner wall of the cavity 24 is fixedly installed with the motor 25, which has a reverse rotation function. The motor 25 is provided to drive the rotating rod 23 to rotate, and the rotating shaft end of the motor 25 is fixedly connected with one end of the rotating rod 23.

[0028] Finally, the second sealing ring 22 is circular in shape and is made of polyimide. When the first sealing ring 5 is damaged and cannot achieve sealing, the second sealing ring 22 is provided to assist in contacting the inner ball of the ball valve to achieve sealing, thereby improving the safety of the ball valve.

[0029] Working mode: in normal working state, the ball and the first sealing ring 5 form a primary sealing surface to ensure reliable closure of the medium channel. When wear or failure of the first sealing ring 5 is detected, the motor 25 can be started to drive the rotating rod 23 to rotate. When the rotating rod 23 rotates, the threads on its surface will drive the lifting rod 27 to move vertically along the inner wall of the limiting sliding groove 26. During the vertical movement of the lifting rod 27, the second sealing ring 22 on the inner wall of the second receiving ring 21 will be lifted. When the lifting rod 27 reaches the preset stroke end point, the second sealing ring 22 will form a complete secondary sealing surface with the ball. Through the above arrangement, when the first sealing ring 5 is damaged and cannot achieve sealing, the second sealing ring 22 is provided to assist in contacting the inner ball of the ball valve to achieve sealing, thereby improving the safety of the ball valve.

[0030] And the scheme realizes quick dismounting of the first sealing ring 5 through cooperation of the fixing groove 4 and the fixing ring 6, the first sealing ring 5 and the second sealing ring 22 are both selected from polyimide material, the material has excellent temperature resistance, excellent mechanical properties suitable for ultra-low temperature to ultra-high temperature working conditions, high strength and wear resistance, excellent chemical stability, resistance to strong corrosive medium, long-term sealing capacity, stable sealing in high pressure and particle-containing medium, and the design significantly improves the maintenance convenience and service life of the sealing system.

[0031] The above merely describes a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A ball valve seat structure comprising a mounting seat (1), characterised in that: The inner wall of the mounting base (1) is provided with an auxiliary mechanism, the top end of the mounting base (1) is provided with a mounting groove (7), the inner wall of the mounting groove (7) is provided with a fixing groove (4), the inner wall of the fixing groove (4) is inserted with a fixing ring (6), the top end of the fixing ring (6) is fixedly installed with a first receiving ring (3), and the inner wall of the first receiving ring (3) is fixedly installed with a first sealing ring (5). The auxiliary mechanism comprises a cavity (24) which is arranged in the inner wall of the mounting base (1), the inner wall of the cavity (24) is rotatably connected with a rotating rod (23) through a bearing, the rotating rod (23) is provided with threads, the rotating rod (23) is threadedly connected with a lifting rod (27), the inner wall of the mounting base (1) is provided with a limiting sliding groove (26), the limiting sliding groove (26) is communicated with the cavity (24), the lifting rod (27) slides in the inner wall of the cavity (24), the top end of the lifting rod (27) is fixedly installed with a second receiving ring (21), the second receiving ring (21) slides in the inner wall of the mounting base (1), and the inner wall of the second receiving ring (21) is fixedly installed with a second sealing ring (22).

2. A ball valve seat structure according to claim 1, wherein: The shape of the fixing groove (4) is a circular ring, the shape of the fixing ring (6) is a circular ring, and the inner ring of the fixing groove (4) is matched with the fixing ring (6).

3. A ball valve seat structure according to claim 1, wherein: The shape of the first receiving ring (3) is a circular ring, and the inner wall of the first receiving ring (3) is a circular arc.

4. A ball valve seat structure according to claim 1, wherein: The shape of the first sealing ring (5) is a circular ring, and the first sealing ring (5) is made of polyimide.

5. A ball valve seat structure according to claim 1, wherein: The shape of the cavity (24) is a square cavity, and the shape of the lifting rod (27) is L-shaped.

6. A ball valve seat structure according to claim 1, wherein: The inner wall of the cavity (24) is fixedly installed with a motor (25), and the rotating shaft end of the motor (25) is fixedly connected with one end of the rotating rod (23).

7. A ball valve seat structure according to claim 1, wherein: The shape of the second sealing ring (22) is a circular ring, and the second sealing ring (22) is made of polyimide.

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