High-pressure hydrogen cut-off valve disc and valve body guide sealing structure

Abstract

The utility model relates to the technical field of stop valve, and disclose high pressure hydrogenation stop valve clack and valve body guide sealing structure, include: set up in the valve body inside the clack, the inside integral type of valve body is provided with the valve seat for with clack cooperation, the top of valve body is rotationally provided with the valve stem for threaded insertion clack center place through the packing box. This high pressure hydrogenation stop valve clack and valve body guide sealing structure, through setting second scraper, with the depression of clack sealing time, second scraper moves along with the pressing cover, and the pressing seal part in the valve seat that is shielded by second scraper is exposed, avoids having small particle to adhere under not influencing the leakproofness, simultaneously, utilize first scraper to scrape the small particle that adheres and scrape off, further exclude the small particle that adheres in stop valve to cause the wear and tear of sealing place, improve the service life of stop valve.

Description

Technical Field

[0001] This utility model relates to the field of shut-off valve technology, specifically to a guide sealing structure for the valve disc and valve body of a high-pressure hydrogenation shut-off valve. Background Technology

[0002] A high-pressure hydrogenation shut-off valve is a type of valve mainly used to control the flow of fluid in a high-pressure hydrogenation unit. It regulates the direction of medium flow by adjusting the valve disc and valve seat seal through a rising valve stem. In the high-pressure hydrogenation process, the shut-off valve is a key control element used to cut off or connect the fluid in the pipeline, ensuring that the medium flows along a predetermined path.

[0003] During the application of gate valves, the medium flowing in the pipeline inevitably produces some tiny particles that adhere to the inner wall of the gate valve. During the opening and closing of the gate valve, the medium passing through it is under high pressure, which affects the tightness of the gate valve closure. Over long-term use, small particles inevitably adhere to the sealing surfaces of the valve disc and valve seat. When the gate valve is closed, the small particles mixed between the valve disc and valve seat will wear down the valve as the closure becomes tighter, resulting in a reduction in the sealing performance of the valve disc and valve seat and affecting the service life of the gate valve. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a guide sealing structure for the valve disc and valve body of a high-pressure hydrogenation shut-off valve, thus solving the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a high-pressure hydrogenation shut-off valve disc and valve body guide sealing structure, including: a valve disc disposed inside the valve body, a valve seat integrally disposed inside the valve body for cooperating with the valve disc, and a valve stem rotatably disposed on the top of the valve body through a packing box for threaded insertion into the center of the valve disc; The inner wall of the valve seat is provided with a pressure sleeve for overlapping with the bottom end of the valve disc. A second scraper is sleeved inside the valve seat on the outer peripheral wall of the pressure sleeve near the top. A first scraper for the valve disc to pass through is installed on the top of the valve seat, and the inner wall of the first scraper is attached to the outer peripheral wall of the valve disc. A sealing ring is provided on the valve disc for pressing and sealing with the inner wall of the valve seat.

[0006] Preferably, the valve body includes a valve housing for mounting on a pipeline, the valve housing having an integrally formed inlet communicating with its interior on its side, the inlet being located above the valve seat, and the valve housing having an outlet mounted on its bottom via a flange.

[0007] Preferably, the valve seat includes a flow seat integrally disposed in the valve body, the flow seat having a flow groove formed in the middle of the flow seat, and the bottom end of the valve disc being inserted into the inner wall of the flow groove. A pressure-absorbing groove is provided at the bottom end of the flow seat, and a pressure spring acting on the pressure sleeve structure is accommodated inside the pressure spring. A base plate for mounting at the bottom end of the flow seat is attached to the bottom of the pressure spring.

[0008] Preferably, the inner diameter of the middle section of the flow channel gradually narrows to form a funnel-shaped seal on its inner wall, and the curvature change of the seal on the inner wall of the flow channel is adapted to the shape of the sealing ring.

[0009] Preferably, the outer edge of the second scraper is integrally provided with multiple sets of silicone sheets for adhering to the inner wall of the flow channel, and the silicone sheets on the second scraper cover the seal of the inner wall of the flow channel.

[0010] Preferably, the inner wall of the first scraper is provided with a silicone sheet for clamping onto the valve disc.

[0011] Preferably, the pressure sleeve includes a sleeve that is movably disposed on the inner wall of the valve seat. A pressure ring for being housed inside the valve seat is provided on the outer peripheral wall of the sleeve via an integrally connected short rod. A pressure pad for engaging with the bottom of the valve disc is integrally formed on the inner wall of the sleeve near the bottom end.

[0012] Preferably, the valve disc includes a top pressure seat for being threaded onto the valve stem, a bottom pressure seat for being inserted into the valve seat below the top pressure seat, a slot for the top pressure seat to be inserted into the top pressure seat at the top of the bottom pressure seat, a slide rod for passing through the top pressure seat inside the slot, a spring overlapping the bottom of the top pressure seat in the slot, a limit plate being installed on the top of the slide rod passing through the top pressure seat, guide seats being provided on the outer edges of both the bottom pressure seat and the top pressure seat, and a guide rail for cooperating with the guide seat being formed on the inner wall of the valve body.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The valve disc and valve body guide sealing structure of this high-pressure hydrogenation shut-off valve, by setting a second scraper, as the valve disc is pressed down during sealing, the second scraper moves with the pressure sleeve, exposing the pressed sealing part inside the valve seat that was covered by the second scraper. This prevents small particles from adhering without affecting the sealing performance. At the same time, during the valve disc's downward sealing process, the sealing ring also passes through the first scraper. The first scraper scrapes the sealing ring, removing the adhering small particles, thereby eliminating the wear caused by small particles adhering inside the shut-off valve on the sealing area and improving the service life of the shut-off valve.

[0014] 2. The valve disc and valve body guide sealing structure of this high-pressure hydrogenation shut-off valve, by setting the valve disc, uses an internally installed spring to buffer the downward pressure during the valve disc sealing process, reducing the stress generated between the valve disc and the valve seat when the valve disc is pressed down. Then, the guide rail guides the downward pressure of the valve disc, and at the same time cooperates with the inlet high pressure to seal. This not only improves the sealing effect, but also further reduces the skew effect caused by the valve disc and valve seat sealing under high pressure impact, and further reduces the wear of the valve disc and valve seat. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a cross-section of the bottom of the valve body of this utility model and a structural diagram of the valve body when the pressure sleeve is removed. Figure 5 This is a schematic diagram of the cross-sectional structure of the pressure sleeve of this utility model; Figure 6 This is a schematic diagram of the valve disc structure of this utility model; Figure 7 This is a schematic diagram of the valve disc disassembly structure of this utility model.

[0016] In the diagram: 1. Valve body; 11. Valve shell; 12. Inlet; 13. Outlet; 2. Valve seat; 21. Flow seat; 22. Flow groove; 23. Pressure groove; 24. Compression spring; 25. Base plate; 3. Valve disc; 31. Bottom pressure seat; 32. Top pressure seat; 33. Guide slide seat; 34. Slide rod; 35. Spring; 36. Limiting plate; 4. Valve stem; 5. Guide rail; 6. First scraper; 7. Pressure sleeve; 71. Sleeve shell; 72. Pressure ring; 73. Pressure pad; 8. Second scraper; 9. Sealing ring. Detailed Implementation

[0017] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-7The high-pressure hydrogenation shut-off valve disc and valve body guide sealing structure includes: a valve disc 3 disposed inside the valve body 1; a valve seat 2 integrally disposed inside the valve body 1 for cooperating with the valve disc 3; and a valve stem 4 rotatably disposed on the top of the valve body 1 through a packing box for threaded insertion into the center of the valve disc 3. The inner wall of the valve seat 2 is provided with a pressure sleeve 7 for overlapping with the bottom end of the valve disc 3. A second scraper 8 is sleeved inside the valve seat 2 on the outer peripheral wall of the pressure sleeve 7 near the top. A first scraper 6 for the valve disc 3 to pass through is installed on the top of the valve seat 2, and the inner wall of the first scraper 6 is attached to the outer peripheral wall of the valve disc 3. A sealing ring 9 is provided on the valve disc 3 for pressing and sealing with the inner wall of the valve seat 2.

[0019] The valve body 1 includes a valve shell 11 for installation on a pipeline. The valve shell 11 has an integrally provided inlet 12 on its side, which communicates with its interior. The inlet 12 is located above the valve seat 2. The bottom of the valve shell 11 is fitted with an outlet 13 via a flange. By designing the inlet 12 above the valve seat 2, the high-pressure impact force can be used to assist the closure of the shut-off valve when it is closed, thereby improving the sealing effect of the shut-off valve.

[0020] The valve seat 2 includes a flow seat 21 integrally disposed in the valve body 1. A flow groove 22 is formed in the middle of the flow seat 21, through which the flow is passed. The bottom end of the valve disc 3 is inserted into the inner wall of the flow groove 22. A pressure-absorbing groove 23 is provided at the bottom end of the flow seat 21. The pressure-absorbing groove 23 contains a pressure spring 24 acting on the structure of the pressure sleeve 7. The bottom of the pressure spring 24 overlaps with a base plate 25 for installation at the bottom end of the flow seat 21. The pressure spring 24 is contained in the pressure-absorbing groove 23, so that the pressure sleeve 7 disposed in the flow groove 22 can always have an upward force under the action of the pressure spring 24, thereby maintaining the effect of the silicone soft sheet on the second scraper 8 covering the sealing area, preventing small particles from adhering to the sealing area, and reducing the wear generated at the sealing area in the flow groove 22.

[0021] The inner diameter of the middle section of the flow channel 22 gradually narrows to form a funnel-shaped seal on its inner wall, and the curvature of the seal on the inner wall of the flow channel 22 is adapted to the shape of the sealing ring 9. The funnel-shaped seal formed by the flow channel 22 cooperates with the sealing ring 9 on the valve disc 3. After the valve disc 3 is pressed down to a certain extent, the sealing ring 9 is pressed against the funnel-shaped seal to achieve a sealing effect.

[0022] The outer edge of the second scraper 8 is integrally provided with multiple sets of silicone sheets for adhering to the inner wall of the flow channel 22, and the silicone sheets on the second scraper 8 cover the seal of the inner wall of the flow channel 22; by using the silicone sheets on the second scraper 8 to cover the seal in the flow channel 22, small particles are prevented from adhering to the seal when the shut-off valve is opened, thereby protecting the seal.

[0023] The inner wall of the first scraper 6 is provided with a silicone soft sheet for clamping onto the valve disc 3. As the valve disc 3 is pressed down, the silicone soft sheet on the first scraper 6 clamped onto the valve disc 3 will be gradually stretched open as the sealing ring 9 passes through the first scraper 6, thereby scraping off the small particles attached to the sealing ring 9, so that the sealing ring 9 can fully fit with the funnel-shaped seal in the flow groove 22, and avoid the small particles attached from affecting its seal.

[0024] The pressure sleeve 7 includes a housing 71 movably disposed on the inner wall of the valve seat 2. A pressure ring 72 for being housed inside the valve seat 2 is provided on the outer peripheral wall of the housing 71 via an integrally connected short rod. A pressure pad 73 for engaging with the bottom of the valve disc 3 is integrally formed on the inner wall of the housing 71 near the bottom. During the downward pressing of the valve disc 3, the bottom of the valve disc 3 contacts the pressure pad 73. As the valve disc 3 continues to press down, the pressure sleeve 7 compresses the pressure spring 24 and drives the second scraper 8 to move down, exposing the funnel-shaped seal that was covered by the silicone soft sheet on the second scraper 8, so that the valve disc 3 can be pressed and sealed with it.

[0025] The valve disc 3 includes a top pressure seat 32 for being threaded onto the valve stem 4. Below the top pressure seat 32 is a bottom pressure seat 31 for being inserted into the valve seat 2. The top of the bottom pressure seat 31 has a groove for the top pressure seat 32 to be inserted into, and a sliding rod 34 for penetrating the top pressure seat 32 is provided inside the groove. A spring 35 is attached to the bottom of the top pressure seat 32 within the groove. The top of the sliding rod 34 penetrates the top pressure seat 32 and a limiting plate 36 is installed on its top. Guide rails are provided along the outer edges of both the bottom pressure seat 31 and the top pressure seat 32. The valve body 1 has a guide rail 5 formed on its inner wall for cooperating with the guide rail 33. During the sealing process of the valve disc 3, the internally installed spring 35 is used to buffer the downward pressure, reducing the stress generated between the valve disc 3 and the valve seat 2 when the valve disc 3 is pressed down. The guide rail 5 is used to guide the downward pressure of the valve disc 3, and at the same time, it cooperates with the high pressure of the inlet 12 to seal. This not only improves the sealing effect, but also further reduces the skew effect caused by the valve disc 3 and the valve seat 2 sealing under high pressure impact, and further reduces the wear of the valve disc 3 and the valve seat 2.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A guide sealing structure between the valve disc and valve body of a high-pressure hydrogenation shut-off valve, characterized in that, include: A valve disc (3) is provided inside the valve body (1). A valve seat (2) for cooperating with the valve disc (3) is integrally provided inside the valve body (1). A valve stem (4) for threaded insertion into the center of the valve disc (3) is rotatably provided on the top of the valve body (1) through a packing box. The inner wall of the valve seat (2) is provided with a pressure sleeve (7) for overlapping with the bottom end of the valve disc (3). A second scraper (8) is sleeved inside the valve seat (2) on the outer peripheral wall of the pressure sleeve (7) near the top. A first scraper (6) for the valve disc (3) to pass through is installed on the top of the valve seat (2), and the inner wall of the first scraper (6) is attached to the outer peripheral wall of the valve disc (3). A sealing ring (9) is provided on the valve disc (3) for pressing and sealing with the inner wall of the valve seat (2).

2. The high-pressure hydrogenation shut-off valve disc and valve body guide sealing structure according to claim 1, characterized in that, The valve body (1) includes a valve housing (11) for mounting on a pipeline. The valve housing (11) has an integrally provided inlet (12) communicating with its interior on its side, and the inlet (12) is located above the valve seat (2). The bottom of the valve housing (11) is fitted with an outlet (13) via a flange.

3. The high-pressure hydrogenation shut-off valve disc and valve body guide sealing structure according to claim 1, characterized in that, The valve seat (2) includes a flow seat (21) integrally disposed in the valve body (1). A flow groove (22) is formed in the middle of the flow seat (21) to pass through it. The bottom end of the valve disc (3) is inserted into the inner wall of the flow groove (22). A pressure groove (23) is provided at the bottom end of the flow seat (21). The pressure groove (23) contains a compression spring (24) acting on the pressure sleeve (7) structure. The bottom of the compression spring (24) overlaps with a base plate (25) for installation at the bottom end of the flow seat (21).

4. The high-pressure hydrogenation shut-off valve disc and valve body guide sealing structure according to claim 3, characterized in that, The inner diameter of the middle section of the flow channel (22) gradually shrinks to form a funnel-shaped seal on its inner wall, and the curvature of the seal on the inner wall of the flow channel (22) is adapted to the shape of the sealing ring (9).

5. The high-pressure hydrogenation shut-off valve disc and valve body guide sealing structure according to claim 3, characterized in that, The outer edge of the second scraper (8) is integrally provided with multiple sets of silicone sheets for attaching to the inner wall of the flow channel (22), and the silicone sheets on the second scraper (8) cover the seal of the inner wall of the flow channel (22).

6. The high-pressure hydrogenation shut-off valve disc and valve body guide sealing structure according to claim 1, characterized in that, The inner wall of the first scraper (6) is provided with a silicone soft sheet for clamping onto the valve disc (3).

7. The high-pressure hydrogenation shut-off valve disc and valve body guide sealing structure according to claim 1, characterized in that, The pressure sleeve (7) includes a sleeve (71) movably disposed on the inner wall of the valve seat (2). A pressure ring (72) for being stored inside the valve seat (2) is provided on the outer peripheral wall of the sleeve (71) by a short rod integrally connected to it. A pressure pad (73) for cooperating with the bottom of the valve disc (3) is integrally formed on the inner wall of the sleeve (71) near the bottom.

8. The high-pressure hydrogenation shut-off valve disc and valve body guide sealing structure according to claim 1, characterized in that, The valve disc (3) includes a top pressure seat (32) for being threaded onto the valve stem (4). Below the top pressure seat (32) is a bottom pressure seat (31) for being inserted into the valve seat (2). The top of the bottom pressure seat (31) has a slot for the top pressure seat (32) to be inserted into, and a slide rod (34) for penetrating the top pressure seat (32) is provided inside the slot. A spring (35) is attached to the bottom of the top pressure seat (32) in the slot. The top of the slide rod (34) penetrates the top pressure seat (32) and a limit plate (36) is installed on its top. Guide slides (33) are provided on the outer edges of both the bottom pressure seat (31) and the top pressure seat (32). A guide rail (5) for cooperating with the guide slide (33) is formed on the inner wall of the valve body (1).

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