A low torque high pressure hydrogenation flat gate valve
By designing a low-torque high-pressure hydrogenation flat gate valve, the combination of pressure rod, spring and sealing ball is used to solve the problem of excessive opening and closing torque of the high-pressure hydrogenation flat gate valve, and the effect of easy operation, improved sealing and reduced maintenance costs is achieved.
Patent Information
- Application Number
- CN202421562930.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-07-03
AI Technical Summary
The opening and closing torque of the high-pressure hydrogenation flat plate gate valve is too large, resulting in difficulty in operation, poor sealing, high maintenance costs and safety hazards.
A low-torque high-pressure hydrogenation flat gate valve is designed. Through the connection between the gate plate and the valve stem, the pressure rod, spring and sealing ball are used to eliminate the effect of upstream and downstream pressure difference on the gate plate and reduce the opening and closing torque.
It effectively reduces the opening and closing torque of the valve, makes the valve easy to open and close, improves sealing, reduces maintenance costs, and reduces safety hazards.
Smart Images
Figure CN222732149U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flat gate valves, in particular to a low-torque high-pressure hydrogenation flat gate valve. Background Art
[0002] High-pressure hydrogenation flat gate valve is a sliding valve with a parallel gate as the closing part. It is mainly used to cut off or connect the flow of medium. It is mainly composed of valve body, gate, valve stem, and seal. The torque of conventional flat gate valves during opening and closing is not only affected by the gravity of the gate itself, but also mainly affected by the torque generated by the pressure of the upstream medium on the gate. Therefore, the following problems are often caused by excessive opening and closing torque:
[0003] 1. Difficult operation: The large opening and closing torque of the high-pressure hydrogenation flat gate valve means that a large force is required to open or close the valve, which brings inconvenience to the operator, especially when frequent operation is required, which will increase the burden on the staff.
[0004] 2. Poor sealing: The sealing of the high-pressure hydrogenation flat gate valve is closely related to its opening and closing torque. If the opening and closing torque is too large, the sealing surface may not fit tightly, thereby reducing the sealing of the valve and increasing the risk of leakage.
[0005] 3. High maintenance cost: Due to the large opening and closing torque of the high-pressure hydrogenation flat gate valve, frequent operation will cause excessive wear of the sealing surface, increase the frequency of maintenance and replacement of seals, and thus increase maintenance costs.
[0006] 4. Safety hazards: The large opening and closing torque of the high-pressure hydrogenation flat gate valve may also cause operators to make mistakes during operation, thereby causing safety accidents.
[0007] Therefore, how to reduce the opening and closing torque of the high-pressure hydrogenation flat gate valve is a technical problem that needs to be solved urgently in this field. Utility Model Content
[0008] The utility model aims to provide a low-torque high-pressure hydrogenation flat gate valve to reduce the opening and closing torque of the high-pressure hydrogenation flat gate valve and solve the above-mentioned problems caused by the large opening and closing torque.
[0009] The embodiments of the present invention are implemented by the following technical solutions:
[0010] A low-torque, high-pressure hydrogenation flat gate valve comprises a valve body, a gate plate and a valve stem, wherein the gate plate is connected to the valve stem and can be axially displaced a target distance relative to the valve stem, a mounting hole is provided at the upper end of the gate plate, a pressure rod is provided in the mounting hole, a spring is provided at the bottom of the mounting hole, a sealing ball is provided between the spring and the pressure rod, a pressure equalizing hole connecting an upstream flow channel and a downstream flow channel is provided on the gate plate, and the pressure equalizing hole intersects with the mounting hole; when the valve is closed, the pressure rod is squeezed by the valve stem, so that the sealing ball closes the pressure equalizing hole; when the valve is opened, the valve stem releases the squeezing of the pressure rod, and the sealing ball moves away from the pressure equalizing hole under the action of the spring, so that the pressure equalizing hole is opened.
[0011] Optionally, an extrusion block is provided at the lower end of the pressure rod, and the extrusion block is provided with an extrusion wedge surface to press the sealing ball toward the intersection of the pressure equalizing hole and one side of the mounting hole during the process of closing the valve.
[0012] Optionally, the extrusion wedge surface is arranged facing the downstream flow channel, so as to press the sealing ball toward the intersection of the pressure equalizing hole and the mounting hole on one side of the downstream flow channel during the valve closing process.
[0013] Optionally, a support block for supporting the gate plate is provided at the bottom of the valve body.
[0014] Optionally, a limit block is provided on the top of the support block, a limit wedge surface is provided on the side of the limit block facing the downstream flow channel, and a wedge groove capable of cooperating with the limit wedge surface is provided on one end of the gate plate close to the support block.
[0015] Optionally, a T-shaped connector is provided at the upper end of the gate plate, and a T-shaped connector groove is provided at the lower end of the valve stem. The T-shaped connector is inserted into the T-shaped connector groove, and a gap is left between the end of the T-shaped connector and the bottom surface of the T-shaped connector groove, and the distance of the gap is the target distance.
[0016] Optionally, a connecting column is provided at the upper end of the gate plate, a connecting hole matching the connecting column is provided at the lower end of the valve stem, the side wall of the connecting column is fixedly connected to the limiting column, and the valve stem is provided with a limiting groove for avoiding the limiting column, and the length of the limiting groove is the length of the target distance.
[0017] The technical solution of the present utility model has at least the following advantages and beneficial effects: in the present utility model, during the closing process of the valve, the valve stem drives the gate plate to fall. Due to the gravity of the gate plate itself, the pressure rod is not squeezed by the valve stem. When the gate plate reaches the closed position, the gate plate is fixed, and the valve stem continues to move downward, squeezing the pressure rod, driving the sealing ball to approach the pressure equalizing hole and compressing the spring, until the valve stem and the gate plate are against each other, and the sealing ball is flush with the pressure equalizing hole, closing the pressure equalizing hole and achieving sealing; when the valve is opened, as the valve stem moves upward, the squeezing of the pressure rod is released, and the sealing ball moves away from the pressure equalizing hole under the action of the spring, so that the pressure equalizing hole is opened, so that the upstream flow channel and the downstream flow channel are connected, and the pressures above and below are balanced. Compared with the conventional flat gate valve, the torque generated by the upstream and downstream pressure differences on the gate plate is eliminated, the valve opening and closing torque is reduced, and the valve is easy to open and close. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 A schematic structural diagram of a low-torque high-pressure hydrogenation flat gate valve provided in Example 1 (valve closed state);
[0020] Figure 2 for Figure 1 A in the enlarged view;
[0021] Figure 3 A structural schematic diagram of a low-torque high-pressure hydrogenation flat gate valve provided in Example 1 (valve open state);
[0022] Figure 4 This is a schematic diagram of the connection structure between the gate plate and the valve stem in the second embodiment;
[0023] Icon: 1-valve body, 2-gate, 201-pressure equalizing hole, 202-wedge groove, 203-T-type connector, 204-connecting column, 2041-limiting column, 3-valve stem, 301-T-type connecting groove, 302-connecting hole, 303-limiting groove, 4-pressure rod, 401-extrusion block, 5-spring, 6-sealing ball, 7-support block, 701-limiting block, 8-upstream flow channel, 9-downstream flow channel. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0027] In the description of the present invention, it should be noted that if the terms "upper", "lower", "top", "bottom", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.
[0028] Embodiment 1
[0029] refer to Figure 1-3 A low-torque high-pressure hydrogenation flat gate valve comprises a valve body 1, a gate plate 2 and a valve stem 3. The gate plate 2 is connected to the valve stem 3, and the gate plate 2 can be axially displaced a target distance relative to the valve stem 3. A mounting hole is provided at the upper end of the gate plate 2, a pressure rod 4 is provided in the mounting hole, a spring 5 is provided at the bottom of the mounting hole, and a sealing ball 6 is provided between the spring 5 and the pressure rod 4. It should be understood that the length of the pressure rod 4 is greater than the target distance to ensure that the pressure rod 4 will not be separated from the mounting hole after the various parts are assembled.
[0030] The gate plate 2 is provided with a pressure equalizing hole 201 connecting the upstream flow channel 8 and the downstream flow channel 9, and the pressure equalizing hole 201 intersects with the mounting hole. In this way, during the valve closing process, the valve stem 3 drives the gate plate 2 to fall. Due to the gravity of the gate plate 2 itself, the pressure rod 4 is not squeezed by the valve stem 3. When the gate plate 2 reaches the closed position, the gate plate 2 is fixed, and the valve stem 3 continues to move downward, squeezing the pressure rod 4, driving the sealing ball 6 to approach the pressure equalizing hole 201 and compressing the spring 5, until the valve stem 3 abuts against the gate plate 2, and the sealing ball 6 is flush with the pressure equalizing hole 201, closing the pressure equalizing hole 201 to achieve sealing; when the valve is opened, as the valve stem 3 moves upward, the squeezing of the pressure rod 4 is released, and the sealing ball 6 moves away from the pressure equalizing hole 201 under the action of the spring 5, that is, the pressure equalizing hole 201 is opened, so that the upstream flow channel 8 and the downstream flow channel 9 are connected, and the pressures are balanced up and down. Compared with the conventional flat gate valve, the torque generated by the upstream and downstream pressure differences on the gate plate 2 is eliminated, the valve opening and closing torque is reduced, and the valve is easy to open and close.
[0031] As an option, in this embodiment, the gate plate 2 and the valve stem 3 are connected in the following manner: a T-shaped connector 203 is provided at the upper end of the gate plate 2, and a T-shaped connecting groove 301 is provided at the lower end of the valve stem 3. The T-shaped connector 203 is inserted into the T-shaped connecting groove 301, and a gap is left between the end of the T-shaped connector 203 and the bottom surface of the T-shaped connecting groove 301. The distance H of the gap is the target distance, that is, the gate plate 2 can have a displacement distance H relative to the valve stem 3. It is easy to understand that in actual applications, the value of H is set according to the distance between the sealing ball 6 and the pressure equalizing hole 201 when the spring 5 is not under force.
[0032] An extrusion block 401 is provided at the lower end of the pressure rod 4, and the extrusion block 401 is provided with an extrusion wedge surface, so that the sealing ball 6 is pressed toward the intersection of the pressure equalizing hole 201 and the mounting hole on one side during the valve closing process. This arrangement makes the seal more reliable. Furthermore, in this embodiment, the extrusion wedge surface is arranged facing the downstream 9, so that the sealing ball 6 is pressed toward the intersection of the pressure equalizing hole 201 and the mounting hole on the downstream flow channel 9 side during the valve closing process. This arrangement makes it possible for the sealing ball 6 to tightly close the pressure equalizing hole 201 in cooperation with the medium pressure to ensure the sealing effect.
[0033] A support block 7 for supporting the gate plate 2 is provided at the bottom of the valve body 1 to limit the position of the gate plate 2. Furthermore, in the present embodiment, a limit block 701 is provided on the top of the support block 7. A limit wedge surface is provided on the side of the limit block 701 facing the downstream flow channel 9. A wedge groove 202 which can cooperate with the limit wedge surface is provided at one end of the gate plate 2 close to the support block 7. With such an arrangement, when the valve is closed, the limit wedge surface can squeeze the side wall of the wedge groove 202, so that the gate plate 2 is pressed against the sealing surface (i.e., the contact surface between the right side of the gate plate 2 and the valve body 1 in the figure) to ensure the sealing performance.
[0034] Embodiment 2
[0035] The difference between this embodiment and the first embodiment is that the connection structure between the gate plate 2 and the valve stem 3 is different. Figure 4 In this embodiment, a connecting column 204 is provided at the upper end of the gate plate 2, a connecting hole 302 matching the connecting column 204 is provided at the lower end of the valve stem 3, a limiting column 2041 is fixedly connected to the side wall of the connecting column 204 (for example, by threaded connection, bonding, etc.), and a limiting groove 303 for avoiding the limiting column 2041 is provided on the limiting column 2041 and the valve stem 3, and the length of the limiting groove 303 is the length of the target distance, and such a setting can also realize that the gate plate 2 can be displaced by the target distance relative to the valve stem 3. Of course, in other embodiments, similar methods can also be used to realize the above functions.
[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A low-torque high-pressure hydrogenation flat gate valve, comprising a valve body (1), a gate plate (2) and a valve stem (3), characterized in that: The gate plate (2) is connected to the valve stem (3), and the gate plate (2) can be axially displaced a target distance relative to the valve stem (3). A mounting hole is provided at the upper end of the gate plate (2), a pressure rod (4) is provided in the mounting hole, a spring (5) is provided at the bottom of the mounting hole, a sealing ball (6) is provided between the spring (5) and the pressure rod (4), and a pressure equalizing hole (201) is provided on the gate plate (2) for connecting an upstream flow channel (8) and a downstream flow channel (9), and the pressure equalizing hole (201) intersects with the mounting hole; when the valve is closed, the pressure rod (4) is squeezed by the valve stem (3), so that the sealing ball (6) closes the pressure equalizing hole (201); when the valve is opened, the valve stem (3) releases the squeezing of the pressure rod (4), and the sealing ball (6) moves away from the pressure equalizing hole (201) under the action of the spring (5), so that the pressure equalizing hole (201) is opened.
2. The low torque high pressure hydrogenation flat gate valve according to claim 1, characterized in that: The lower end of the pressure rod (4) is provided with an extrusion block (401), and the extrusion block (401) is provided with an extrusion wedge surface so as to press the sealing ball (6) toward the intersection of the pressure equalizing hole (201) and one side of the installation hole during the process of closing the valve.
3. The low torque high pressure hydrogenation flat gate valve according to claim 2, characterized in that: The extrusion wedge surface is arranged facing the downstream flow channel (9) so as to press the sealing ball (6) toward the intersection of the pressure equalizing hole (201) and the mounting hole on one side of the downstream flow channel (9) during the process of closing the valve.
4. The low torque high pressure hydrogenation flat gate valve according to claim 1, characterized in that: A supporting block (7) for supporting the gate plate (2) is provided at the bottom of the valve body (1).
5. The low torque high pressure hydrogenation flat gate valve according to claim 4, characterized in that: A limiting block (701) is provided on the top of the support block (7), a limiting wedge surface is provided on the side of the limiting block (701) facing the downstream flow channel (9), and a wedge groove (202) capable of cooperating with the limiting wedge surface is provided on one end of the gate plate (2) close to the support block (7).
6. The low torque high pressure hydrogenation flat gate valve according to any one of claims 1 to 5, characterized in that: The upper end of the gate plate (2) is provided with a T-shaped connector (203), and the lower end of the valve stem (3) is provided with a T-shaped connector groove (301). The T-shaped connector (203) is inserted into the T-shaped connector groove (301), and a gap is left between the end of the T-shaped connector (203) and the bottom surface of the T-shaped connector groove (301), and the distance of the gap is the target distance.
7. The low torque high pressure hydrogenation flat gate valve according to any one of claims 1 to 5, characterized in that: The upper end of the gate plate (2) is provided with a connecting column (204), the lower end of the valve stem (3) is provided with a connecting hole (302) that cooperates with the connecting column (204), the side wall of the connecting column (204) is fixedly connected to the limiting column (2041), and the valve stem (3) is provided with a limiting groove (303) that avoids the limiting column (2041), and the length of the limiting groove (303) is the length of the target distance.