A hard-seated ball valve with coating

Abstract

The application discloses a kind of hard sealing ball valve with coating, belong to ball valve technical field.Mainly include: main valve body, rotatable ball valve is installed in the main valve body, one end of the main valve body is equipped with auxiliary valve body, the other end of the main valve body is equipped with side valve body, elastic compensation component is installed in the main valve body, the elastic compensation component includes annular seat installed in the auxiliary valve body and the side valve body, the auxiliary valve body and the side valve body are equipped with with the assembly groove of adaptation of the annular seat.The hard sealing ball valve with coating of the application, spring continuously pushes adapter seat, in turn drive sealing seat and ball valve closely, can automatically compensate the wear of sealing surface due to long-term use, effectively guarantee the long-term sealing reliability of valve, meanwhile, the scraper ring on sealing seat can remove the impurities on the surface of ball valve in the process of ball valve rotation, reduce the intensified wear of impurities to sealing surface.

Description

Technical Field

[0001] This application relates to the field of ball valve technology, specifically a coated hard-seal ball valve. Background Technology

[0002] Ball valves, as a common type of valve for controlling fluid flow, are widely used in many industrial fields such as petroleum, chemical, natural gas, metallurgy, and power due to their advantages such as simple structure, good sealing performance, and rapid opening and closing. The opening and closing element of a ball valve is a ball, which is driven by the valve stem and rotates around the axis of the ball valve. The opening and closing of the valve is achieved by the rotation of the ball. When the ball rotates 90°, the valve completes one opening and closing action. It has a large flow capacity and low flow resistance, and is particularly suitable for controlling fluids with high viscosity and suspended particles.

[0003] For example, patent CN219588159U discloses a hard-seal fixed ball valve, including a valve body, a sealing mechanism, a valve ball, a valve stem, a first sealing seat, a second sealing seat, a sealing element, and a sealing block. The beneficial effect of this invention is that the sealing element improves the sealing performance between the valve ball and the valve body, and the cooperation between the fixed block and the fixed groove improves the sealing performance between the first and second sealing seats, making it convenient for users.

[0004] However, in the aforementioned patented sealing ball valve, during the opening and closing process of the ball valve, the sealing seat and the sealing end face of the ball valve are in continuous contact and relative movement. This frequent friction will cause the sealing surface to wear gradually. As the usage time goes by, the wear of the sealing surface will continue to intensify, and the gap between the sealing surfaces will gradually increase. When the gap exceeds a certain limit, the fluid will leak from the gap, affecting the sealing performance of the valve. Meanwhile, the structure lacks an effective impurity cleaning device, and suspended particles in the fluid easily deposit on the sealing surface. These suspended particles not only increase the frictional resistance between the sealing surfaces and further aggravate the wear of the sealing surfaces, but may also embed themselves in the sealing surfaces, causing defects such as scratches and pits, which further reduces the sealing effect of the valve body. Therefore, it is necessary to provide a coated hard-seal ball valve to solve the above problems. Summary of the Invention

[0005] Based on the aforementioned problems in the prior art, the problem to be solved by this application is to provide a coated hard-seal ball valve, which solves the problems in the above-mentioned patents where frequent friction between the sealing seat and the sealing end face of the ball valve leads to wear, increased gap and leakage, and the deposition of suspended particles in the fluid exacerbates wear and reduces the sealing effect.

[0006] The technical solution adopted by this application to solve its technical problem is: a coated hard-seal ball valve, comprising: The main valve body contains a rotatable ball valve, an auxiliary valve body is installed at one end of the main valve body, and a side valve body is installed at the other end of the main valve body. An elastic compensation assembly is installed in the main valve body. The elastic compensation assembly includes an annular seat installed in the auxiliary valve body and the side valve body. Both the auxiliary valve body and the side valve body are provided with an assembly groove adapted to the annular seat. Multiple springs are installed on the annular seat. One end of each spring is installed with an adapter seat. A sealing seat adapted to the ball valve is installed on the adapter seat. The sealing seat is equipped with a scraper ring and a sealing compensation gasket adapted to the ball valve.

[0007] Furthermore, each of the adapter seats is equipped with a plurality of first limiting plates, and each of the assembly slots is provided with a first limiting groove that is adapted to the first limiting plate.

[0008] Furthermore, both the ball valve and the sealing seat are coated with an EDC hard coating.

[0009] Furthermore, the spring causes the sealing seat to maintain a tendency to move toward the ball valve.

[0010] Furthermore, both the auxiliary valve body and the side valve body are provided with a sliding groove adapted to the sealing seat.

[0011] Furthermore, the sealing seat is equipped with multiple second limiting plates, and the sliding groove is provided with multiple second limiting grooves that are adapted to the second limiting plates.

[0012] Furthermore, the sealing compensation gasket is made of fluororubber material.

[0013] The beneficial effects of this application are as follows: In the coated hard-seal ball valve provided by this application, the spring continuously pushes the adapter seat, thereby causing the sealing seat to fit tightly with the ball valve. This can automatically compensate for the wear of the sealing surface caused by long-term use, effectively ensuring the long-term sealing reliability of the valve. At the same time, the scraper ring on the sealing seat can remove impurities from the surface of the ball valve in time during the rotation of the ball valve, reducing the aggravated wear of the sealing surface by impurities. Finally, the sealing compensation gasket further improves the sealing performance of the ball valve, enhances the wear resistance and corrosion resistance of the ball valve, and extends its service life.

[0014] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a three-dimensional structural schematic diagram of a coated hard-seal ball valve according to an embodiment of this application; Figure 2 This is a first cross-sectional view of a coated hard-seal ball valve according to an embodiment of this application; Figure 3 This is a second cross-sectional view of a coated hard-seal ball valve according to an embodiment of this application; Figure 4 According to the embodiments of this application Figure 3 Enlarged view of point A in the middle; Figure 5 This is a three-dimensional structural diagram of the side valve body and the elastic compensation component according to an embodiment of this application.

[0016] The following are the labeling elements in the figure: 1. Main valve body; 11. Auxiliary valve body; 12. Valve stem; 13. Ball valve; 14. Handle; 2. Side valve body; 3. Elastic compensation assembly; 31. Annular seat; 32. Assembly groove; 33. Spring; 34. Adapter seat; 35. First limiting plate; 36. First limiting groove; 37. Sealing seat; 371. Slide groove; 38. Second limiting plate; 39. Second limiting groove; 4. Scraper ring; 5. Sealing compensation gasket. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0019] like Figure 1 and Figure 2As shown, this application provides a coated hard-seal ball valve, including a main valve body 1, which serves as the main support structure of the valve body, providing installation space for internal components and bearing fluid pressure; an auxiliary valve body 11 is fixedly installed at one end of the main valve body 1, and the auxiliary valve body 11 cooperates with the main valve body 1 to form a complete valve body structure, which is used to assist in the installation of elastic compensation parts and to achieve sealing on one side. A valve stem 12 is installed inside the main valve body 1. A rotatable ball valve 13 is installed at one end of the valve stem 12. The ball valve 13 serves as an opening and closing element, and the valve is opened and closed by rotating 90° around its own axis to control the flow and cut off of fluid. A handle 14 is fixedly installed at the other end of the valve stem 12. The valve stem 12 plays the role of transmitting torque, transmitting the rotation of the handle 14 to the ball valve 13. At the same time, the handle 14 facilitates the operator to apply force to rotate the valve stem 12. It is provided with anti-slip texture (not shown in the figure) to increase hand friction and improve the ease of operation.

[0020] like Figures 2-5 As shown, a side valve body 2 is bolted to the other end of the main valve body 1. The side valve body 2, together with the main valve body 1 and the auxiliary valve body 11, constitutes the valve body as a whole. Its structural design is symmetrical with that of the auxiliary valve body 11 to ensure uniform force on the valve. An elastic compensation component 3 is installed in both the auxiliary valve body 11 and the side valve body 2. The elastic compensation component 3 includes an annular seat 31. An assembly groove 32 is provided in both the auxiliary valve body 11 and the side valve body 2. The assembly groove 32 provides precise installation positioning for the annular seat 31 to ensure the concentricity of the elastic compensation component 3. The annular seat 31 is fixedly installed in the assembly groove 32 as the basic component of the elastic compensation component 3. Multiple springs 33 are fixedly installed at the end of the annular seat 31 near the main valve body 1. The springs 33 are made of high-strength spring steel, have good elastic recovery performance and fatigue life, and can continuously provide stable thrust. A transition seat 34 is fixedly installed at one end of the spring 33. Multiple first limiting plates 35 are fixedly installed on the inner wall of the transition seat 34. A first limiting groove 36 adapted to the first limiting plate 35 is provided in the assembly groove 32. A sealing seat 37 adapted to the ball valve 13 is fixedly installed at the end of the transition seat 34 near the main valve body 1. Specifically, the circumferential rotational freedom of the transition seat 34 is restricted by the fitting relationship between the first limiting plate 35 and the first limiting groove 36, so as to ensure that it always maintains coaxiality with the valve body axis under the thrust of the spring 33 or the impact of fluid pressure, and avoid misalignment of the sealing surface of the sealing seat 37 and the ball valve 13 due to the torsion of the transition seat 34, thus ensuring full fit of the sealing surface. The outer surface of the ball valve 13 and the sealing seat 37 are coated with a hard coating. This hard coating is an EDC coating, which is a wear-resistant hard coating that can significantly improve the wear resistance and corrosion resistance of the sealing surface.

[0021] The spring 33 keeps the sealing seat 37 moving towards the ball valve 13. At the same time, the curvature of the sealing surface of the sealing seat 37 is consistent with the curvature of the outer surface of the ball valve 13, ensuring that the two can fit tightly together to form an effective sealing line, which can prevent fluid leakage even when the fluid contains corrosive components.

[0022] Both the auxiliary valve body 11 and the side valve body 2 are provided with sliding grooves 371 that are adapted to the sealing seat 37. The surface of the sliding grooves 371 is smoothed to reduce the frictional resistance when the sealing seat 37 moves, so that the sealing seat 37 can flexibly respond to the wear changes of the sealing surface under the action of the spring 33. Multiple second limiting plates 38 are fixedly installed on the outer wall of the sealing seat 37. Multiple second limiting grooves 39 adapted to the second limiting plates 38 are provided on the sliding grooves 371. The second limiting plates 38 and the second limiting grooves 39 cooperate to further enhance the stability of the sealing seat 37 when it moves, prevent it from tilting when subjected to the lateral force of the fluid, and ensure that the sealing surface of the sealing seat 37 and the ball valve 13 always maintain full contact.

[0023] like Figure 5 As shown, a scraper ring 4 and a sealing compensation pad 5 adapted to the ball valve 13 are fixedly installed at one end of the sealing seat 37 near the main valve body 1. The scraper ring 4 is made of a composite material of polytetrafluoroethylene and bronze powder, which has excellent wear resistance and self-lubricating properties. Its inner side maintains a 0.1-0.2mm fit gap with the surface of the ball valve 13. During the rotation of the ball valve 13, it can scrape off suspended particles, oil stains and oxide scale and other impurities attached to the ball surface in real time, preventing impurities from entering between the sealing surfaces and forming abrasive particles, thereby reducing additional wear on the sealing surface. The sealing compensation pad 5 is made of fluororubber material and is annular in cross-section. Its thickness is designed according to the sealing pressure. Under the thrust of the spring 33, it always maintains a pre-tightening force on the surface of the ball valve 13. When the sealing surface of the sealing seat 37 or the ball valve 13 experiences minor wear, the compensation pad can fill the gap through its own elastic deformation to maintain a reliable sealing effect. At the same time, the outer edge of the sealing compensation pad 5 and the sealing seat 37 form a secondary sealing barrier to further prevent fluid penetration.

[0024] Working principle: When the operator turns the handle 14, the friction increased by the anti-slip texture of the handle 14 facilitates the application of torque. This torque is transmitted to the ball valve 13 through the valve stem 12, causing the ball valve 13 to rotate around its own axis. When the ball valve 13 rotates 90°, it completes one opening and closing action: when the ball's through hole is aligned with the channel formed by the main valve body 1, the auxiliary valve body 11, and the side valve body 2, the valve is in the open state, and the fluid can pass through smoothly. When the ball's surface completely blocks the channel, the valve is closed, cutting off the flow of fluid. When the valve is closed, the spring 33 in the elastic compensation component 3 continuously applies a thrust to the adapter 34. The adapter 34 transmits the thrust to the sealing seat 37, so that the sealing seat 37 fits tightly against the surface of the ball valve 13. Since the arc of the sealing surface of the sealing seat 37 is consistent with the arc of the outer surface of the ball valve 13, and both are coated with EDC wear-resistant hard coating, it can ensure that the sealing surface fits completely to form an effective sealing line. At the same time, the high wear resistance and corrosion resistance of the coating can reduce the wear caused by long-term contact friction, and resist the erosion of corrosive components in the fluid. During the rotation of the ball valve 13, the scraper ring 4 on the sealing seat 37 keeps in contact with the ball valve 13 along with the sealing seat 37. Utilizing the properties of its composite material of polytetrafluoroethylene and bronze powder, it scrapes off the suspended particles, oil stains and oxide scale and other impurities attached to the surface of the ball valve 13 in real time when the ball valve 13 rotates. After these impurities are scraped off, they are less likely to enter between the sealing surface of the sealing seat 37 and the sealing surface of the ball valve 13, thus reducing the wear of the sealing surface. As the valve is used for a long time, the sealing surfaces of the sealing seat 37 and the ball valve 13 will inevitably experience minor wear. At this time, the elastic restoring force of the spring 33 pushes the adapter seat 34 and the sealing seat 37 to move towards the ball valve 13 to make up for the gap caused by wear. During this process, the first limiting plate 35 slides in the first limiting groove 36 and the second limiting plate 38 slides in the second limiting groove 39 to ensure that the adapter seat 34 and the sealing seat 37 always move smoothly along the valve body axis without circumferential rotation or lateral tilting, thus ensuring that the sealing surfaces are continuously and fully in contact. Meanwhile, under the thrust of the spring 33, the sealing compensation gasket 5 further fills the tiny gaps caused by wear on the sealing surface through its own elastic deformation. Its annular cross-section design can evenly distribute the pre-tightening force. The secondary sealing barrier formed by the outer edge and the sealing seat 37 further enhances the reliability of the seal and effectively blocks fluid penetration. Even if the sealing surface is slightly worn, it can still maintain a good sealing effect.

[0025] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A coated hard-seal ball valve, characterized in that: include: The main valve body (1) is equipped with a rotatable ball valve (13), an auxiliary valve body (11) is installed at one end of the main valve body (1), and a side valve body (2) is installed at the other end of the main valve body (1). The elastic compensation component (3) is installed in the main valve body (1). The elastic compensation component (3) includes an annular seat (31) installed in the auxiliary valve body (11) and the side valve body (2). The auxiliary valve body (11) and the side valve body (2) are provided with an assembly groove (32) adapted to the annular seat (31). Multiple springs (33) are installed on the annular seat (31). One end of each spring (33) is equipped with a transition seat (34). A sealing seat (37) adapted to the ball valve (13) is installed on the transition seat (34). The sealing seat (37) is respectively equipped with a scraper ring (4) and a sealing compensation gasket (5) adapted to the ball valve (13).

2. The coated hard-seal ball valve according to claim 1, characterized in that: Each adapter (34) is equipped with a plurality of first limiting plates (35), and each assembly slot (32) is provided with a first limiting slot (36) that is adapted to the first limiting plate (35).

3. A coated hard-seal ball valve according to claim 1, characterized in that: Both the ball valve (13) and the sealing seat (37) are coated with EDC hard coating.

4. A coated hard-seal ball valve according to claim 1, characterized in that: The spring (33) causes the sealing seat (37) to maintain a tendency to move toward the ball valve (13).

5. A coated hard-seal ball valve according to claim 1, characterized in that: Both the auxiliary valve body (11) and the side valve body (2) are provided with a sliding groove (371) that is adapted to the sealing seat (37).

6. A coated hard-seal ball valve according to claim 5, characterized in that: The sealing seat (37) is equipped with a plurality of second limiting plates (38), and the sliding groove (371) is provided with a plurality of second limiting grooves (39) that are adapted to the second limiting plates (38).

7. A coated hard-seal ball valve according to claim 1, characterized in that: The sealing compensation gasket (5) is made of fluororubber.

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