Ball valve with easily removable seat

Abstract

The utility model discloses a ball valve convenient to dismantle valve seat relates to ball valve technical field, and the valve seat can be positioned installation in the valve cavity in this ball valve device, and it is convenient to dismantle simultaneously, and the device includes valve body, valve ball, valve rod and valve seat, is equipped with the valve cavity in the valve body, and the valve ball rotation is placed in the valve cavity, and the valve rod passes through the valve body and is connected with the valve rod, and the valve seat is installed in the both ends in the valve body and is in the valve ball abuts, and its characterized in that: the valve seat is set up with multiple positioning rods in the circumferential uniformity on the side away from the valve ball, and the valve body is provided with multiple positioning air passages matched with the positioning rod, and the valve seat is installed in the positioning air passage through the positioning rod, and the valve seat is positioned through the positioning rod installation in the positioning air passage, prevents its rotation because of external force, and simultaneously because of the effect of air pressure, the valve seat will be pushed to the ball valve in reverse, and the contact with the ball valve is more closely, and when needing to dismantle, also will be pushed out because of the effect of air pressure, and it is more convenient to dismantle the valve seat.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and more particularly to a ball valve with an easy-to-disassemble valve seat. Background Technology

[0002] In modern industrial fluid control systems, ball valves are widely used in many key fields such as petroleum, chemical, water conservancy, and power due to their significant advantages such as simple structure, strong flow capacity, and rapid opening and closing. As the core sealing component of a ball valve, the performance of the valve seat directly determines the sealing reliability and service life of the entire valve. Currently, most mainstream ball valves on the market adopt a detachable valve seat design.

[0003] The existing detachable valve seat lacks a stable and reliable fixing structure between itself and the valve cavity wall. During frequent valve opening and closing, the valve seat is subjected to various alternating loads such as the impact force of the medium and the extrusion force of the ball, resulting in a long-term unstable stress state. This makes the valve seat prone to displacement, loosening, or even misalignment, leading to incomplete valve closure, medium leakage, endangering production safety and the environment. It also accelerates wear between the valve seat and the ball, shortens the service life of the valve seat, and further reduces the overall operational reliability of the ball valve, posing significant safety hazards and economic losses to industrial production. Furthermore, after prolonged use, when the medium contains particulate impurities, viscous substances, or corrosive components, the medium can easily intrude into the gap between the valve seat and the valve cavity and accumulate, eventually encasing the valve seat and making it difficult to disassemble during maintenance. Utility Model Content

[0004] To address the above shortcomings, this utility model provides a ball valve with an easy-to-disassemble valve seat, which can position and install the valve seat in the valve cavity while facilitating disassembly.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A ball valve with an easily detachable valve seat includes a valve body, a valve ball, a valve stem, and a valve seat. The valve body has a valve cavity, the valve ball is rotatably placed in the valve cavity, the valve stem passes through the valve body and is connected to the valve stem, and the valve seat is installed at both ends of the valve body and abuts against the valve ball. The valve seat is characterized by having multiple positioning rods evenly arranged circumferentially on the side of the valve seat away from the valve ball, and multiple positioning air passages matching the positioning rods are provided in the valve body. The valve seat is installed in the positioning air passages through the positioning rods.

[0007] Preferably, it also includes a sealing ring, multiple positioning air passages that run horizontally through the valve body, an air chamber inside the sealing ring, and multiple air outlet pipes evenly arranged on the side circumferentially. The multiple air outlet pipes are sealed and inserted into the air ports outside the multiple positioning air passages one by one. The sealing ring is also provided with a valve for charging and decharging.

[0008] Preferably, the tail of the positioning rod is provided with an annular groove, and a first sealing rubber ring is provided in the annular groove.

[0009] Preferably, a second sealing rubber ring is installed circumferentially on the air outlet pipe.

[0010] Preferably, limit rings are provided at the air inlets of multiple positioning airways, and the outer diameter of the second sealing rubber ring at the end away from the sealing air ring is smaller than the outer diameter at the other end.

[0011] Preferably, a mounting groove for the positioning air passage port is provided on the side of the sealing air ring near the valve body, corresponding to the position of the positioning air passage, and a third sealing rubber ring is provided in the mounting groove.

[0012] Preferably, there are no fewer than three positioning air passages that are evenly arranged circumferentially on the valve body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this valve body device, multiple positioning rods are evenly arranged circumferentially on the side of the valve seat away from the valve ball, and multiple positioning air passages matching the positioning rods are provided in the valve body. The valve seat is installed in the positioning air passages through the positioning rods so that the valve seat can be positioned and prevented from rotating due to external force. At the same time, due to the action of air pressure, the valve seat will be pushed in the opposite direction towards the ball valve, making the contact with the ball valve tighter. When disassembly is required, it will also be pushed out due to the action of air pressure, making it easier to disassemble the valve seat.

[0015] 2. The device also includes a sealing ring, with multiple positioning air channels running horizontally through the valve body. The sealing ring has an air chamber inside, and multiple air outlet pipes are evenly arranged on its side. Each air outlet pipe is sealed and inserted into the air port on the outside of the multiple positioning air channels. The sealing ring is also equipped with a valve for charging and decharging. The sealing ring can adjust the positive pressure of the valve seat on the valve ball by adjusting the air pressure inside the sealing ring, preventing insufficient air pressure in the positioning air channels from causing the valve seat and valve ball to not fit tightly and leak. At the same time, when the valve seat is difficult to disassemble due to being covered by impurities, it is only necessary to charge air into the sealing ring through the valve to increase the air pressure inside, which can push the valve seat out. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 In this utility model Figure 2 A magnified view of point A;

[0020] Figure 4 In this utility model Figure 2 Enlarged view of point B.

[0021] Reference numerals in the attached drawings: 1. Valve body; 2. Valve stem; 3. Valve ball; 4. Valve cavity; 5. Positioning air passage; 6. Valve seat; 7. Sealing air ring; 8. Air valve; 9. Air outlet pipe; 10. Air cavity; 11. Positioning rod; 12. First sealing rubber ring; 13. Limiting ring; 14. Second sealing rubber ring; 15. Third sealing rubber ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] This utility model provides a ball valve with an easily disassembled valve seat 6. In this ball valve device, the valve seat 6 can be positioned and installed within the valve cavity 4, and is also easy to disassemble; for example... Figures 1-4As shown, the ball valve device includes a valve body 1, a valve ball 3, a valve stem 2, and a valve seat 6. The valve body 1 has a valve cavity 4, and the valve ball 3 is rotatably positioned within the valve cavity 4. The valve stem 2 passes through the valve body 1 and connects to the valve ball 3. The valve seat 6 is installed at both ends within the valve body 1 and abuts against the valve ball 3. The key feature is that multiple positioning rods 11 are evenly arranged circumferentially on the side of the valve seat 6 away from the valve ball 3. Multiple positioning air passages 5, matching the positioning rods 11, are provided within the valve body 1. The valve seat 6 is installed within the positioning air passages 5 via the positioning rods 11. This structure, through the cooperation of the positioning rods 11 and the positioning air passages 5, ensures accurate positioning of the valve seat 6 within the valve cavity 4. This not only prevents the valve seat 6 from shifting or loosening during high-frequency opening and closing but also ensures that the valve seat 6 always maintains a stable contact position with the valve ball 3, thereby improving the valve's sealing reliability and vibration resistance. Simultaneously, it provides a physical guiding foundation for subsequent disassembly, effectively preventing damage to the sealing surface due to installation deviations.

[0026] Furthermore, the device also includes a sealing ring 7, multiple positioning air channels 5 that transversely penetrate the valve body 1, an air chamber 10 inside the sealing ring 7, and multiple air outlet pipes 9 evenly arranged circumferentially on its side. Each air outlet pipe 9 is correspondingly and sealed to the air inlet of the external positioning air channel 5. The sealing ring 7 is also equipped with a valve 8 for charging and decharging. The sealing ring 7 and the air outlet pipes 9 form an independent closed pneumatic system. After the valve seat 6 is positioned, the sealing ring 7 is charged by controlling the valve 8, allowing airflow to enter the positioning air channel 1 through the air outlet pipes 9. Positioning air passage 5 forms a stable air pressure force, which acts on positioning rod 11 and is further transmitted to valve seat 6, making the force direction of valve seat 6 consistent with the contact direction of valve ball 3, thereby enhancing the sealing positive pressure and avoiding loosening of valve seat 6 or deterioration of sealing performance caused by medium impact. At the same time, during maintenance, the valve seat 6 can be pushed out of the positioning position by pressurizing the sealing air ring 7 through reverse operation, realizing pneumatic assisted disassembly, reducing damage caused by manual knocking or forced prying, and improving maintenance efficiency and equipment safety.

[0027] The positioning rod 11 has an annular groove at its tail, and a first sealing rubber ring 12 is installed in the annular groove. This structure enables the positioning rod 11 to achieve axial sealing when it is inserted into the positioning air passage 5. The first sealing rubber ring 12 forms an effective sealing barrier at the tail of the positioning rod 11, which not only prevents the medium from seeping into the positioning air passage 5 and causing contamination of the valve body 1, but also blocks the leakage channel of the air pressure system, ensuring that the air pressure generated by the sealing air ring 7 can be stably and concentratedly applied to the surface of the valve seat 6, while improving the overall sealing performance of the system.

[0028] A second sealing rubber ring 14 is installed circumferentially on the vent pipe 9. This ring-shaped sealing structure is located at the connection interface between the vent pipe 9 and the air port of the positioning air passage 5. It forms a tight contact with the relative hole wall through the elastic sealing material, ensuring full circumferential sealing during the insertion of the vent pipe 9, preventing gas leakage, maintaining the stability of the air source provided by the sealing air ring 7, providing a continuous and reliable power source for the pneumatic fitting and disassembly of the valve seat 6, and also avoiding gas leakage from affecting surrounding equipment or personnel.

[0029] Limiting rings 13 are installed at the air inlets of multiple positioning air channels 5. The outer diameter of the second sealing rubber ring 14 at the end away from the sealing air ring 7 is smaller than the outer diameter at the other end. The second sealing rubber ring 14 is conical, making it easier to insert into the limiting ring 13. At the same time, since the outer diameter of the limiting ring 13 and the second sealing rubber ring 14 at the end near the sealing air ring 7 is larger than the inner diameter of the limiting ring 13, even if the sealing air ring 7 is pushed out due to air pressure, the second sealing rubber ring 14, in conjunction with the limiting ring 13, can still prevent air leakage. This structure achieves multi-stage sealing and limiting functions through geometric dimensions and structural design. The conical rubber ring is easy to quickly insert into the limiting ring 13 to form an initial seal, and automatically forms a pressure fit seal with the limiting ring 13 after inflation and expansion, improving the overall airtightness. Even if there are external impacts or air pressure fluctuations, it can maintain a stable closed state, preventing the sealing air ring 7 from being pushed out of its positioning position due to air pressure reaction force, ensuring stable system operation, and extending the service life of the equipment.

[0030] Furthermore, the sealing ring 7 is provided with an installation groove for the air inlet of the positioning air passage 5 on the side near the valve body 1. A third sealing rubber ring 15 is provided in the installation groove. The third sealing rubber ring 15 is located at the sealing transition interface between the sealing ring 7 and the valve body 1, forming an independent buffer sealing layer. It can play a role in position guidance and secondary sealing during installation, preventing leakage risk caused by slight changes in the fit gap between the sealing ring 7 and the valve body 1. At the same time, it can absorb some of the slight deformation caused by installation stress, thereby improving the flexibility and tightness of the entire sealing structure and making the connection between the sealing ring 7 and the valve body 1 more reliable.

[0031] At least three positioning air channels 5 are evenly arranged circumferentially on the valve body 1 to further prevent air leakage. With three or more evenly arranged positioning air channels 5, not only can the valve seat 6 be stably supported in the circumferential direction and the geometric balance of spatial positioning be achieved, but also a multi-channel air pressure transmission system is formed on the basis of multi-point symmetrical positioning. This makes the valve seat 6 subjected to force at each point evenly, and the contact force is more uniform, further reducing the risk of sealing deviation caused by single-point loading. At the same time, multiple positioning points can reduce the impact of sealing failure at any positioning point on the overall system, significantly improving the sealing reliability and operational stability of the entire ball valve.

[0032] Through the optimized design of the above-mentioned structural components, the valve seat 6 not only has stable positioning, strong sealing and impact resistance, but also realizes the ability to quickly disassemble and assemble the valve seat 6 during maintenance, which greatly improves the maintenance efficiency and operational reliability of industrial valve systems.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A ball valve with an easily removable valve seat, comprising a valve body (1), a valve ball (3), a valve stem (2), and a valve seat (6), wherein the valve body (1) has a valve cavity (4), the valve ball (3) is rotatably placed in the valve cavity (4), the valve stem (2) passes through the valve body (1) and is connected to the valve body (1), and the valve seat (6) is installed at both ends inside the valve body (1) and abuts against the valve ball (3), characterized in that: The valve seat (6) has multiple positioning rods (11) evenly arranged around the side opposite to the valve ball (3). The valve body (1) has multiple positioning air passages (5) that match the positioning rods (11). The valve seat (6) is sealed and installed in the positioning air passages (5) through the positioning rods (11).

2. A ball valve with an easily disassembled valve seat according to claim 1, characterized in that: It also includes a sealing air ring (7), multiple positioning air channels (5) that run horizontally through the valve body (1), an air chamber (10) is provided inside the sealing air ring (7), and multiple air outlet pipes (9) are evenly arranged on the side circumferentially. The multiple air outlet pipes (9) are sealed and inserted one by one into the air ports outside the multiple positioning air channels (5). The sealing air ring (7) is also provided with an air valve (8) for charging and discharging air.

3. A ball valve with an easily disassembled valve seat according to claim 1, characterized in that: The positioning rod (11) has an annular groove at its tail, and a first sealing rubber ring (12) is provided in the annular groove.

4. A ball valve with an easily disassembled valve seat according to claim 2, characterized in that: The vent pipe (9) is circumferentially fitted with a second sealing rubber ring (14).

5. A ball valve with an easily disassembled valve seat according to claim 4, characterized in that: Limiting rings (13) are provided at the air inlets of the multiple positioning air channels (5), and the outer diameter of the second sealing rubber ring (14) at one end away from the sealing air ring (7) is smaller than the outer diameter of the other end.

6. A ball valve with an easily disassembled valve seat according to claim 2, characterized in that: The sealing gas ring (7) is provided with an installation groove around the air port of the positioning air passage (5) on the side near the valve body (1) and corresponding to the positioning air passage (5). A third sealing rubber ring (15) is provided in the installation groove.

7. A ball valve with an easily disassembled valve seat according to claim 1, characterized in that: The positioning air passages (5) are not less than three and are evenly arranged on the valve body (1) in a circumferential manner.

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