Conical sealing rubber stop valve

Abstract

The utility model discloses a conic surface sealing lining rubber stop valve, including the valve body, and the import channel and export channel of connecting at the both sides of valve body, the inside of valve body is provided with the valve seat, and the opposite one end of import channel and export channel is communicated each other through the valve seat in common, the inner side wall of valve seat is provided with the conical sealing mechanism for sealing to it, the top of conical sealing mechanism is connected with valve rod, and the top of valve rod is connected with drive mechanism, the utility model discloses through the composite structure of conical sealing mechanism outside wall and lining rubber close connection, enhances the combination intensity of lining rubber and valve clack, solves the problem that traditional single vulcanization mode lining rubber layer is easy to peel, and the problem of falling off is solved, prolongs the life, and the sealing reliability is promoted, through the flexible connection of conical sealing mechanism top, ensures the accurate fit of the conic surface of valve clack and the conic surface of valve seat, avoids the influence sealing of excessive deflection, eliminates the defect caused by traditional rigid connection, makes the sealing surface contact even, and the sealing performance is improved significantly.

Description

Technical Field

[0001] This application relates to the field of valve manufacturing technology, specifically to a cone-shaped sealed rubber-lined gate valve. Background Technology

[0002] As an important fluid control device, the conical seal rubber-lined gate valve is widely used in corrosive media pipeline systems in chemical, sewage treatment, and pharmaceutical fields due to the high specific pressure characteristics of the conical seal and the corrosion resistance of the rubber lining. Its core function is to cut off or conduct the medium through the conical contact between the valve disc and the valve seat.

[0003] However, in traditional rubber-lined gate valves, the valve disc and rubber lining are often bonded using a single vulcanization method. This involves directly attaching the rubber layer to the metal substrate surface of the valve disc through high-temperature vulcanization. Especially when the valve is frequently opened and closed or the medium pressure fluctuates, peeling stress easily occurs at the interface between the rubber lining and the metal substrate. Particularly in the edge area of ​​the conical seal, the rubber lining is prone to localized lifting or detachment due to pressure concentration. In addition, the valve disc and valve stem of traditional conical seal gate valves are often rigidly connected. When the valve stem is affected by installation deviations, slight deformation after long-term use, or radial sway during operation, the valve disc cannot adaptively adjust its angle, easily resulting in "misaligned contact" with the conical surface of the valve seat. This leads to uneven contact of the sealing surface, poor sealing performance, and affects the service life of the equipment.

[0004] Therefore, a cone-shaped sealed rubber-lined stop valve is proposed. Utility Model Content

[0005] The purpose of this invention is to propose a conical sealing rubber-lined stop valve to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a conical sealing rubber-lined gate valve, comprising a valve body and an inlet channel and an outlet channel connected to both sides of the valve body, characterized in that: a valve seat is provided inside the valve body, the opposite ends of the inlet channel and the outlet channel are interconnected through the valve seat, a conical sealing mechanism for sealing is provided on the inner side wall of the valve seat, multiple rubber linings are connected to the outer side wall of the conical sealing mechanism, a valve stem is connected to the top of the conical sealing mechanism, and a driving mechanism is connected to the top of the valve stem.

[0007] Preferably, the conical sealing mechanism includes an upper valve disc and a lower valve disc disposed on the inner wall of the valve seat. The bottom end of the upper valve disc and the top end of the lower valve disc are fixedly connected to each other. The inner wall of the valve seat is formed into a stepped conical surface. The conical angle of the upper valve disc is greater than that of the lower valve disc to better fit the inner wall of the valve seat.

[0008] Preferably, the outer side wall of the upper valve disc is provided with multiple annular grooves, and the inner side wall of each of the multiple annular grooves is fixedly installed with a T-shaped clip, and the outer side wall of each of the multiple T-shaped clips is connected with a rubber lining.

[0009] Preferably, a ball seat is fixedly connected to the top of the upper valve disc, a ball socket is provided on the inner side wall of the ball seat, and an annular retaining ring is connected to the top of the ball seat.

[0010] Preferably, the bottom end of the valve stem is connected to a ball head, and the outer side wall of the ball head is rotatably installed in a ball socket opened in the ball seat.

[0011] Preferably, the drive mechanism includes a screw fixedly mounted on the top of the valve stem, a handwheel connected to the top of the screw, a pressure cap threadedly connected to the outer side wall of the screw, brackets connected to both sides of the bottom of the pressure cap, a valve cover fixedly mounted on the other end of the two brackets, and the outer side wall of the valve stem slidably mounted on the inner side wall of the valve cover.

[0012] Preferably, an upper flange is fixedly installed on the outer wall of the valve cover, a lower flange is provided at the bottom of the upper flange, the outer wall of the lower flange is fixedly installed on the top of the valve body, and the inner walls of the lower flange and the upper flange are both threaded with multiple double-ended bolts and interconnected with each other by the multiple double-ended bolts.

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

[0014] This invention enhances the bonding strength between the rubber lining and the valve disc by creating multiple annular grooves on the outer wall of the upper valve disc of the conical sealing mechanism and a composite structure in which a T-shaped clip is fixed inside the grooves and tightly connected to the rubber lining. This solves the problem of easy peeling and detachment of the rubber lining layer in the traditional single vulcanization method, extends the sealing life, and improves the sealing reliability. The flexible connection at the top of the conical sealing mechanism ensures precise contact between the conical surface of the valve disc and the conical surface of the valve seat, avoids excessive deflection affecting the seal, eliminates the "misalignment" defect caused by the traditional rigid connection, makes the sealing surface contact uniform, and significantly improves the sealing performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the shut-off valve of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the shut-off valve of this utility model when it is closed;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the shut-off valve of this utility model when it is open and closed;

[0018] Figure 4 This is a cross-sectional structural diagram of the conical sealing mechanism of this utility model.

[0019] In the diagram: 1. Valve body; 2. Inlet channel; 3. Outlet channel; 4. Lower flange; 5. Upper flange; 6. Double-ended bolt; 7. Valve cover; 8. Bracket; 9. Gland; 10. Screw; 11. Handwheel; 12. Valve stem; 13. Ball head; 14. Annular retaining ring; 15. Ball seat; 16. Rubber lining; 17. T-shaped clamp; 18. Upper valve disc; 19. Lower valve disc; 20. Valve seat. Detailed Implementation

[0020] 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.

[0021] Example: Please refer to Figures 1-4 This utility model provides a technical solution for a conical sealing rubber-lined stop valve: the conical sealing rubber-lined stop valve includes a valve body 1, and an inlet channel 2 and an outlet channel 3 connected to both sides of the valve body 1. A valve seat 20 is provided inside the valve body 1. The opposite ends of the inlet channel 2 and the outlet channel 3 are connected to each other through the valve seat 20. A conical sealing mechanism for sealing is provided on the inner side wall of the valve seat 20. A valve stem 12 is connected to the top of the conical sealing mechanism. A drive mechanism is connected to the top of the valve stem 12.

[0022] In this embodiment, the conical sealing mechanism includes an upper valve disc 18 and a lower valve disc 19 disposed on the inner wall of the valve seat 20. The bottom end of the upper valve disc 18 and the top end of the lower valve disc 19 are fixedly connected to each other. The inner wall of the valve seat 20 is formed into a stepped conical surface. The conical angle of the upper valve disc 18 is greater than that of the lower valve disc 19 to better fit the inner wall of the valve seat 20. The upper valve disc 18 and the lower valve disc 19 move downward under the action of the valve stem 12. Since the conical angle of the upper valve disc 18 is greater than that of the lower valve disc 19 and is adapted to the stepped conical surface of the valve seat 20, the lower valve disc 19 first contacts the lower section of the conical surface of the valve seat 20 for initial sealing. As it continues to move downward, the upper valve disc 18 then contacts the upper section of the conical surface of the valve seat 20 to achieve double sealing. When opened, the valve discs move upward, and the two conical surfaces separate from the valve seat 20 in sequence, allowing the medium to flow through the channel.

[0023] In this embodiment, the outer side wall of the upper valve disc 18 is provided with multiple annular grooves, and T-shaped clips 17 are fixedly installed on the inner side wall of each of the multiple annular grooves. The outer side wall of each of the multiple T-shaped clips 17 is connected with a rubber lining 16. The rubber lining 16 is connected to the annular groove of the upper valve disc 18 through the T-shaped clips 17. The annular grooves form an axial constraint on the rubber lining 16, while the T-shaped clips 17 are embedded inside the rubber lining 16 to form a radial fixation, further fixing the rubber lining 16.

[0024] In this embodiment, a ball seat 15 is fixedly connected to the top of the upper valve disc 18. A ball socket is provided on the inner side wall of the ball seat 15. An annular retaining ring 14 is connected to the top of the ball seat 15. The annular retaining ring 14 restricts the upward displacement of the ball head 13 and limits the rotation angle of the ball head 13 to avoid excessive deflection affecting the seal. The bottom end of the valve stem 12 is connected to the ball head 13. The outer side wall of the ball head 13 is rotatably installed in the ball socket provided by the ball seat 15. When the valve stem 12 drives the valve disc to move, if there is a slight angular deviation between the valve disc and the conical surface of the valve seat 20, the ball head 13 can rotate accordingly in the ball socket, driving the valve disc to make a fine adjustment of the angle, so that the conical surface of the valve disc and the conical surface of the valve seat 20 are evenly fitted. During the opening and closing process, the rotational contact between the ball head 13 and the ball socket replaces the sliding friction of the traditional rigid connection.

[0025] In this embodiment, the driving mechanism includes a screw 10 fixedly installed on the top of the valve stem 12. A handwheel 11 is connected to the top of the screw 10. A pressure cap 9 is threadedly connected to the outer side wall of the screw 10. A bracket 8 is connected to both sides of the bottom of the pressure cap 9. A valve cover 7 is fixedly installed at the other end of the two brackets 8. The outer side wall of the valve stem 12 is slidably installed on the inner side wall of the valve cover 7. Rotating the handwheel 11 drives the screw 10 to rotate. The screw 10 is threadedly connected to the pressure cap 9. The rotational motion of the screw 10 is converted into axial linear motion, which drives the valve stem 12 to slide up and down inside the valve cover 7 to realize the opening and closing action.

[0026] In this embodiment, an upper flange 5 is fixedly installed on the outer side wall of the valve cover 7, and a lower flange 4 is provided at the bottom of the upper flange 5. The outer side wall of the lower flange 4 is fixedly installed on the top of the valve body 1. The inner side walls of the lower flange 4 and the upper flange 5 are both threaded with multiple double-ended bolts 6 and are connected to each other by the multiple double-ended bolts 6. By tightening the double-ended bolts 6, the upper flange 5 and the lower flange 4 are tightly fitted. When disassembling, the valve cover 7 and the valve body 1 can be separated by loosening the double-ended bolts 6, which facilitates the maintenance and replacement of internal components.

[0027] The working principle is as follows: When using the valve to open or close, turning the handwheel 11 clockwise rotates the top screw 10, which in turn rotates the screw 10. The rotational motion of the screw 10 is converted into axial linear motion, which in turn drives the valve stem 12 to slide up and down along the inner wall of the valve cover 7, providing driving force for the operation of the conical sealing mechanism. When closing, the valve stem 12 drives the upper valve disc 18 and the lower valve disc 19 to move downward. Because the cone angle of the upper valve disc 18 is greater than that of the lower valve disc 19 and it is adapted to the stepped cone surface of the valve seat 20, the lower valve disc 19 first contacts the lower cone surface of the valve seat 20 for initial sealing. After continuing to move downward, the upper valve disc 18 then contacts the upper cone surface of the valve seat 20 to achieve double sealing. When opening, the valve stem 1... 2. The valve disc moves upward, and the two conical surfaces separate from the valve seat 20, so that the inlet channel 2 and the outlet channel 3 are connected to each other through the valve seat 20, allowing the medium to flow. At the same time, during the movement of the valve disc, if there is a slight angular deviation between the valve disc and the conical surface of the valve seat 20, the ball head 13 at the bottom of the valve stem 12 can rotate accordingly in the ball socket of the ball seat 15, driving the valve disc to make a fine adjustment of the angle, ensuring that the conical surfaces fit evenly. The annular retaining ring 14 restricts the excessive deflection of the ball head 13. When it is necessary to repair or replace the internal components of the valve, first loosen the multiple double-ended bolts 6 connecting the upper flange 5 and the lower flange 4, so that the valve cover 7 is separated from the valve body 1, and take out the valve stem 12 and the conical sealing mechanism and other internal components for inspection.

[0028] 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 cone-shaped sealed rubber-lined gate valve, comprising a valve body (1), and an inlet channel (2) and an outlet channel (3) connected on both sides of the valve body (1), characterized in that: The valve body (1) is provided with a valve seat (20) inside. The opposite ends of the inlet channel (2) and the outlet channel (3) are connected to each other through the valve seat (20). The inner side wall of the valve seat (20) is provided with a conical sealing mechanism for sealing it. The outer side wall of the conical sealing mechanism is connected with a plurality of rubber linings (16). The top of the conical sealing mechanism is connected with a valve stem (12). The top end of the valve stem (12) is connected with a drive mechanism.

2. The cone-shaped sealing rubber-lined stop valve according to claim 1, characterized in that: The conical sealing mechanism includes an upper valve disc (18) and a lower valve disc (19) disposed on the inner wall of the valve seat (20). The bottom end of the upper valve disc (18) and the top end of the lower valve disc (19) are fixedly connected to each other. The inner wall of the valve seat (20) is opened into a stepped conical surface. The conical angle of the upper valve disc (18) is greater than that of the lower valve disc (19) so as to fit the inner wall of the valve seat (20) more closely.

3. The cone-shaped sealing rubber-lined stop valve according to claim 2, characterized in that: The outer side wall of the upper valve disc (18) is provided with multiple annular grooves, and the inner side wall of each of the multiple annular grooves is fixedly installed with a T-shaped clip (17), and the outer side wall of each of the multiple T-shaped clips (17) is connected with a rubber lining (16).

4. The cone-shaped sealing rubber-lined stop valve according to claim 2, characterized in that: The top of the upper valve disc (18) is fixedly connected to a ball seat (15), the inner sidewall of the ball seat (15) is provided with a ball socket, and the top of the ball seat (15) is connected to an annular retaining ring (14).

5. The cone-shaped sealing rubber-lined stop valve according to claim 1, characterized in that: The bottom end of the valve stem (12) is connected to a ball head (13), and the outer side wall of the ball head (13) is rotatably installed in a ball socket opened in the ball seat (15).

6. The cone-shaped sealing rubber-lined stop valve according to claim 1, characterized in that: The drive mechanism includes a screw (10) fixedly installed on the top of the valve stem (12), a handwheel (11) connected to the top of the screw (10), a pressure cap (9) threadedly connected to the outer side wall of the screw (10), and brackets (8) connected to both sides of the bottom of the pressure cap (9). A valve cover (7) is fixedly installed at the other end of the two brackets (8), and the outer side wall of the valve stem (12) is slidably installed on the inner side wall of the valve cover (7).

7. The conical sealing rubber-lined stop valve according to claim 6, characterized in that: The outer side wall of the valve cover (7) is fixedly installed with an upper flange (5), and a lower flange (4) is provided at the bottom of the upper flange (5). The outer side wall of the lower flange (4) is fixedly installed on the top of the valve body (1). The inner side walls of the lower flange (4) and the upper flange (5) are both threaded with multiple double-ended bolts (6) and are connected to each other by multiple double-ended bolts (6).

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