Ball valve for polycrystalline silicon medium

Abstract

The utility model relates to the technical field of polycrystalline silicon medium ball valves, and discloses a ball valve for polycrystalline silicon media, which comprises a valve body, a valve cavity is arranged in the valve body, a sealing ring is slidably connected to the inner wall of the valve cavity, a second valve seat is fixedly connected to the outer wall of the valve body, a dustproof assembly is arranged in the second valve seat, and the dustproof assembly is fixedly connected to the valve cavity. The dustproof assembly comprises a first connecting block, the outer wall of the first connecting block is slidably connected to the interior of the second valve seat, a belleville spring is fixedly connected to one side of the first connecting block, the outer wall of a valve seat sealing gasket is slidably connected to the interior of the second valve seat, and the outer wall of the valve seat sealing gasket is slidably connected to the outer wall of the sealing ring. According to the unique valve seat spring cavity dustproof structure, the dustproof pad is reversely pushed through the retaining ring, media are effectively prevented from entering the spring cavity, working failure of the spring is avoided, long-term stable operation of the valve is guaranteed, the sealing performance and normal working of the valve under different working conditions are guaranteed, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of polysilicon medium ball valves, in particular to a ball valve used for polysilicon medium. Background Art

[0002] In polysilicon production and other related fields, it is often necessary to control the flow of polysilicon media. Ball valves, as an important fluid control valve, are widely used due to their excellent sealing performance and convenient operation. However, the polysilicon production process requires high media purity and complex operating conditions, which places even higher demands on ball valve performance.

[0003] Existing ball valves for polysilicon media have certain deficiencies in preventing media leakage and dust. The dust-proof structure design of some ball valves is not reasonable enough, and only uses a simple sealing method, which cannot effectively prevent dust, impurities, etc. from entering the interior of the valve. In the polysilicon production environment, fine dust particles may enter the interior of the valve with the flow of media or air, and accumulate in key parts such as the valve seat and sealing ring, affecting the sealing performance of the valve, causing media leakage, which may in turn affect the quality and efficiency of polysilicon production. In addition, ordinary dust-proof structures are prone to failure due to wear, aging, etc. during long-term use, and cannot continuously ensure the cleanliness of the interior of the valve, shortening the service life of the valve and increasing maintenance costs. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a ball valve for polysilicon medium, aiming to improve the problem in the prior art that the dustproof structure is relatively simple, which affects the quality and efficiency of polysilicon production.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a ball valve for polysilicon medium, comprising a valve body, wherein a valve cavity is opened inside the valve body, a sealing ring is slidably connected to the inner wall of the valve cavity, the outer wall of the valve body is fixedly connected to the valve seat 2, the outer wall of the valve seat 2 is provided with a protective assembly, the outer wall of the sealing ring is fixedly connected to a force unloading spring, one end of the force unloading spring is fixedly connected to the inner wall of the valve body, a dustproof assembly is provided inside the valve seat 2, the dustproof assembly comprises a connecting block 1, the outer wall of the connecting block 1 is slidably connected to the inside of the valve seat 2, one side of the connecting block 1 is fixedly connected to a butterfly spring, the other side of the connecting block 1 is fixedly connected to a valve seat sealing gasket, the outer wall of the valve seat sealing gasket is slidably connected to the inside of the valve seat 2, the outer wall of the valve seat sealing gasket is slidably connected to the outer wall of the sealing ring, and the outer wall of the connecting block 1 is slidably connected to the inside of the valve seat 2.

[0006] Furthermore, the protective component includes a dust ring 1, the outer wall of the dust ring 1 is fixedly connected to the inner wall of the valve seat 2, and the outer wall of the dust ring 1 is fixedly connected to the inside of the valve cavity.

[0007] Furthermore, a valve stem is rotatably connected to the inside of the valve body, a ball core is fixedly connected to the inside of the valve stem, an inner scraper is rotatably connected to the outer wall of the ball core, an outer scraper is fixedly connected to the outer wall of the inner scraper, and the outer wall of the outer scraper is fixedly connected to the sealing ring near the inner wall of the ball core.

[0008] Furthermore, the upper surface of the valve body is fixedly connected to a bracket, the upper surface of the bracket is slidably connected to an upper valve cover, the lower surface of the valve body is slidably connected to a lower valve cover, the inner wall of the upper valve cover is fixedly connected to a packing spring, the end of the packing spring away from the upper valve cover is fixedly connected to a connecting block 2, the outer wall of the connecting block 2 is slidably connected to the inside of the bracket, and the lower surface of the connecting block 2 is fixedly connected to a filler.

[0009] Furthermore, a second dust ring is fixedly connected to the interior of the bracket, a third dust ring is fixedly connected to the interior of the bracket, and the outer wall of the valve stem is rotatably connected to the interior of the bracket.

[0010] Furthermore, a valve seat 1 is fixedly connected to the outer wall of the valve body, and a handle is fixedly connected to the upper surface of the bracket.

[0011] Furthermore, a fixed shaft is fixedly connected to the lower surface of the core.

[0012] Furthermore, a handle is fixedly connected to the upper surface of the valve stem.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, the unique dust-proof structure of the valve seat spring cavity pushes back the dust-proof pad through the buckle ring, effectively preventing the medium from entering the spring cavity, avoiding spring failure, and ensuring long-term stable operation of the valve. The extra-large spring preload stroke effectively responds to temperature changes, prevents thermal expansion of the valve seat assembly due to temperature increase, and ensures the sealing performance and normal operation of the valve under different working conditions. The valve body adopts an integrated design, the valve body is forged as a whole and the space dimensions at both ends are consistent, avoiding the problem of different expansion amounts caused by differences in expansion coefficients. At the same time, the pipeline stress can be eliminated during installation, thereby enhancing the stability of the overall valve structure, extending the valve service life, and reducing maintenance costs.

[0015] 2. In the utility model, the sphere is equipped with internal and external scrapers, which can effectively prevent solid particles from adhering to the sphere surface, keep the sphere surface clean, reduce the impact of particles on the sealing surface between the sphere and the valve seat, reduce the valve torque, and make operation more labor-saving. The valve seat is equipped with a scraper, which forms an automatic cleaning combination with the sphere scraper, further improving the self-cleaning ability of the valve and enhancing the sealing performance, ensuring that under working conditions such as polysilicon media, the valve can maintain a good sealing effect for a long time, prevent media leakage, and ensure the safety and stability of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a ball valve for polysilicon medium proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the valve body structure of a ball valve for polysilicon media proposed by the utility model;

[0018] Figure 3 This is a schematic structural diagram of the lower valve cover portion of a ball valve for polysilicon media proposed in the utility model;

[0019] Figure 4 for Figure 3 A magnified view of point A in the figure;

[0020] Figure 5 for Figure 3 Enlarged view of point B in FIG.

[0021] Figure 6 for Figure 3 Enlarged view of point C in the figure;

[0022] Figure 7 This is a schematic structural diagram of the handle portion of a ball valve for polysilicon media proposed in the present utility model;

[0023] Figure 8 for Figure 7 Enlarged view of point D in .

[0024] Legend:

[0025] 1. Valve body; 2. Valve seat 1; 3. Valve stem; 4. Bracket; 5. Valve seat 2; 6. Valve chamber; 7. Sealing ring; 8. Unloading spring; 9. Fixed shaft; 10. Lower valve cover; 11. Valve seat gasket; 12. Butterfly spring; 13. Connecting block 1; 14. Dust ring 1; 15. Dust ring 2; 16. Dust ring 3; 17. Inner scraper; 18. Outer scraper; 19. Ball core; 20. Packing spring; 21. Filler; 22. Upper valve cover; 23. Handle; 24. Connecting block 2; 25. Grip. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Reference Figure 1 - Figure 6, the utility model provides an embodiment: a ball valve for polysilicon medium, including a valve body 1, the valve body 1 serves as the main frame of the entire ball valve, and provides an installation foundation and accommodating space for other components. A valve cavity 6 is opened inside the valve body, and the valve cavity 6 is the main place for medium circulation and the operation of the internal components of the valve. The inner wall of the valve cavity 6 is slidably connected with a sealing ring 7, and the sealing ring 7 is used to be in close contact with the ball core 19 when the valve is closed to achieve a good sealing effect and prevent medium leakage. The outer wall of the valve body 1 is fixedly connected with a valve seat 2 5, and the valve seat 2 5 provides an installation position for components such as the valve seat sealing gasket 11, and cooperates with the sealing ring 7 to enhance the sealing performance. The outer wall of the valve seat 2 5 is provided with a protective component, which includes a dust ring 14. The outer wall of the dust ring 14 is fixedly connected to the valve seat 2 5 inner wall and the inside of the valve cavity 6, its function is to prevent external dust and other impurities from entering the valve cavity 6 and the inside of the valve seat 2 5, protect the internal components of the valve from pollution, and ensure the normal operation of the valve. The outer wall of the sealing ring 7 is fixedly connected with a unloading spring 8, and one end of the unloading spring 8 is fixedly connected to the inner wall of the valve body 1. The unloading spring 8 can play a buffering role in the process of valve closing, reduce the impact force of the ball core 19 on the sealing ring 7, and extend the service life of the sealing ring 7. At the same time, it assists the sealing ring 7 to return to its original position when the valve is opened. A dustproof component is provided inside the valve seat 2 5, and the dustproof component includes a connecting block 13. The outer wall of the connecting block 13 is slidably connected to the inside of the valve seat 2 5. A butterfly spring 12 is fixedly connected to one side of the connecting block 13. The butterfly spring 12 can provide pre-tightening force to ensure that the valve seat sealing gasket 11 and The sealing ring 7 fits tightly, further enhancing the sealing effect, and at the same time compensates for the deformation of the sealing components caused by factors such as temperature changes to a certain extent. The other side of the connecting block 13 is fixedly connected to the valve seat sealing gasket 11, and the outer wall of the valve seat sealing gasket 11 is slidably connected to the inside of the valve seat 2 5 and the outer wall of the sealing ring 7. The valve seat sealing gasket 11 and the sealing ring 7 work together to effectively prevent the medium from leaking from the valve seat and ensure the sealing performance of the valve. The outer wall of the connecting block 13 is slidably connected to the inside of the valve seat 2 5, so that the valve seat sealing gasket 11 can flexibly adjust its position within a certain range to adapt to the sealing requirements under different working conditions. The upper surface of the valve body 1 is fixedly connected to the bracket 4, which is used to support and fix the upper valve cover 22 components to ensure the stability of the valve structure. The upper surface of the bracket 4 is slidably connected There is an upper valve cover 22, which seals the upper part of the valve body 1 to protect the internal components. The lower valve cover 10 is slidably connected to the bottom of the valve body 1. The lower valve cover 10 and the upper valve cover 22 work together to encapsulate the internal components of the valve body 1 to prevent external impurities from entering. The inner wall of the upper valve cover 22 is fixedly connected to a packing spring 20. The end of the packing spring 20 away from the upper valve cover 22 is fixedly connected to a connecting block 24. The packing spring 20 provides elastic support for the connecting block 24, so that the filler 21 can better fill the gap between the valve stem 3 and the bracket 4. The outer wall of the connecting block 24 is slidably connected to the inside of the bracket 4. The lower surface of the connecting block 24 is fixedly connected to the filler 21. The filler 21 is used to fill the gap between the valve stem 3 and the bracket 4 to prevent the medium from leaking from this part.At the same time, the action of the packing spring 20 can keep the filler 21 in a good sealing state, adapting to the rotation of the valve stem 3 and temperature changes. The dust ring 2 15 and the dust ring 3 16 are fixedly connected to the inside of the bracket 4. The dust ring 2 15 and the dust ring 3 16 can prevent dust and other impurities from entering the valve through the gap between the bracket 4 and the valve stem 3, protecting the normal operation of the valve stem 3 and related components. The outer wall of the valve stem 3 is rotatably connected to the inside of the bracket 4. The valve stem 3 can flexibly rotate under the support of the bracket 4 to realize the operation of the ball core 19. The outer wall of the valve body 1 is fixedly connected to the valve seat 1 2. The valve seat 1 2 and the valve seat 2 5 work together with the ball core 19 to realize the opening and closing function of the valve while ensuring the sealing effect. The upper surface of the bracket 4 is fixedly connected to the handle 23 to facilitate the operator to move the ball valve.

[0028] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 and Figure 8 The valve body 1 is internally connected to a valve stem 3, which is a key component for controlling the rotation of the ball core 19. By rotating the valve stem 3, the position of the ball core 19 is changed, thereby realizing the switching operation of the valve. The valve stem 3 is internally fixedly connected to a ball core 19, which is a component that directly controls the flow of the medium. The outer wall of the ball core 19 is rotatably connected to an inner scraper 17. As the ball core 19 rotates, the inner scraper 17 can scrape off impurities such as solid particles attached to the surface of the ball core 19 to prevent the accumulation of impurities from affecting the rotation and sealing performance of the ball core 19. The outer wall of the inner scraper 17 is fixedly connected to an outer scraper 18, which further expands The scraping range will scrape away impurities that may be attached to the vicinity of the sealing ring 7, and keep the contact area between the sealing ring 7 and the ball core 19 clean. The outer wall of the outer scraper 18 is fixedly connected to the inner wall of the sealing ring 7 near the ball core 19, and works in conjunction with the sealing ring 7 to achieve self-cleaning function while ensuring sealing. The lower surface of the ball core 19 is fixedly connected to a fixed shaft 9, which supports and positions the ball core 19, so that the ball core 19 can rotate stably in the valve body 1. The upper surface of the valve stem 3 is fixedly connected to a handle 25. The operator rotates the valve stem 3 by holding the handle 25, thereby operating the valve, making the operation more convenient.

[0029] Working principle: When the operator needs to open the valve, he holds the handle 25 and applies a torque to rotate the valve stem 3 around its axis. Since the valve stem 3 is fixedly connected to the ball core 19, the rotation of the valve stem 3 will drive the ball core 19 to rotate synchronously in the valve cavity 6 of the valve body 1. When the ball core 19 rotates until its through hole coincides with the pipeline axis, the medium channel is fully opened, and the polysilicon medium can pass through the ball valve smoothly. At this time, the valve is in a fully open state, and the medium flows smoothly in the valve cavity 6 under the action of the pressure difference. During the rotation of the ball core 19, the inner scraper 1 on its outer wall rotates, and the inner scraper 17 will scrape off impurities such as solid particles that may be attached to the surface of the ball core 19 to prevent these impurities from accumulating on the surface of the ball core 19, thereby avoiding the accumulation of impurities affecting the rotation flexibility of the ball core 19. The outer scraper 18 which is fixedly connected to the inner scraper 17 will also rotate with the ball core 19. The outer scraper 18 further expands the scraping range and scrapes away impurities that may be attached to the vicinity of the sealing ring 7, ensuring that the contact area between the sealing ring 7 and the ball core 19 is always kept clean, thereby achieving a self-cleaning function while ensuring good sealing performance of the valve, reducing the increase in torque caused by the influence of impurities, and making the valve operation more labor-saving. The valve seat gasket 11 is always tightly fitted to the outer wall of the sealing ring 7 under the pre-tightening force of the butterfly spring 12, and works together with the sealing ring 7 to form a reliable sealing defense line, effectively preventing the medium from leaking from the valve seat, ensuring the sealing performance of the valve when it is open, and avoiding medium leakage affecting the polysilicon production process;

[0030] When the valve needs to be closed, the operator rotates the handle 25 in the opposite direction, and the valve stem 3 drives the ball core 19 to rotate in the opposite direction. When the ball core 19 rotates until its through hole is perpendicular to the pipeline axis, the medium channel is cut off, and the valve is in a closed state, preventing the polysilicon medium from continuing to flow. During the valve closing process, the unloading spring 8 plays a buffering role, absorbing the impact force of the ball core 19 on the sealing ring 7, avoiding the sealing ring 7 from being damaged due to excessive impact force, thereby extending the service life of the sealing ring 7 and ensuring the sealing reliability when the valve is closed. At the same time, the packing spring 20 ensures that the filler 21 is always in a good filling state, even if the position of the valve stem 3 changes to a certain extent during the rotation process or due to factors such as temperature changes, The filler 21 can also tightly fill the gap between the valve stem 3 and the bracket 4 to prevent the medium from leaking from this part. During the entire opening and closing operation of the valve, the dust ring 1 14, the dust ring 2 15 and the dust ring 3 16 continue to play a dust-proof role, blocking dust and other impurities from entering the valve from various possible entrances, protecting the internal components of the valve from pollution, ensuring that the components can work normally, and maintaining good performance of the valve. The integrated design of the valve body 1 ensures the stability of its overall structure, effectively avoids the problem of expansion difference caused by temperature changes, and can eliminate the influence of pipeline stress on the valve during installation, further enhancing the valve's ability to operate stably for a long time under the complex working conditions of polysilicon production.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ball valve for polysilicon medium, comprising a valve body (1), characterized in that: A valve cavity (6) is provided inside the valve body (1), and a sealing ring (7) is slidably connected to the inner wall of the valve cavity (6). A second valve seat (5) is fixedly connected to the outer wall of the valve body (1), and a protective component is provided on the outer wall of the second valve seat (5). A force unloading spring (8) is fixedly connected to the outer wall of the sealing ring (7), and one end of the force unloading spring (8) is fixedly connected to the inner wall of the valve body (1). A dustproof component is provided inside the second valve seat (5); The dustproof component includes a connecting block (13), the outer wall of the connecting block (13) is slidably connected to the inside of the valve seat (5), a butterfly spring (12) is fixedly connected to one side of the connecting block (13), and a valve seat sealing gasket (11) is fixedly connected to the other side of the connecting block (13), the outer wall of the valve seat sealing gasket (11) is slidably connected to the inside of the valve seat (5), the outer wall of the valve seat sealing gasket (11) is slidably connected to the outer wall of the sealing ring (7), and the outer wall of the connecting block (13) is slidably connected to the inside of the valve seat (5).

2. A ball valve for polysilicon media according to claim 1, characterized in that: The protective component includes a dust ring (14), the outer wall of which is fixedly connected to the inner wall of the valve seat (5), and the outer wall of which is fixedly connected to the inside of the valve cavity (6).

3. A ball valve for polysilicon media according to claim 1, characterized in that: The valve body (1) is rotatably connected to a valve stem (3), the valve stem (3) is fixedly connected to a ball core (19), the outer wall of the ball core (19) is rotatably connected to an inner scraper (17), the outer wall of the inner scraper (17) is fixedly connected to an outer scraper (18), and the outer wall of the outer scraper (18) is fixedly connected to the inner wall of the sealing ring (7) near the ball core (19).

4. A ball valve for polysilicon media according to claim 3, characterized in that: The upper surface of the valve body (1) is fixedly connected to a bracket (4), the upper surface of the bracket (4) is slidably connected to an upper valve cover (22), the lower surface of the valve body (1) is slidably connected to a lower valve cover (10), the inner wall of the upper valve cover (22) is fixedly connected to a packing spring (20), the end of the packing spring (20) away from the upper valve cover (22) is fixedly connected to a connecting block 2 (24), the outer wall of the connecting block 2 (24) is slidably connected to the inside of the bracket (4), and the lower surface of the connecting block 2 (24) is fixedly connected to a filler (21).

5. A ball valve for polysilicon media according to claim 4, characterized in that: A second dust ring (15) is fixedly connected to the interior of the bracket (4), a third dust ring (16) is fixedly connected to the interior of the bracket (4), and the outer wall of the valve stem (3) is rotatably connected to the interior of the bracket (4).

6. A ball valve for polysilicon media according to claim 5, characterized in that: The outer wall of the valve body (1) is fixedly connected to a valve seat (2), and the upper surface of the bracket (4) is fixedly connected to a handle (23).

7. The ball valve for polysilicon media according to claim 3, characterized in that: The lower surface of the ball core (19) is fixedly connected with a fixed shaft (9).

8. The ball valve for polysilicon media according to claim 3, characterized in that: A handle (25) is fixedly connected to the upper surface of the valve stem (3).

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