Spring-boosted valve quick opening and closing device

Abstract

The utility model discloses a spring power -assisted formula valve quick opening and closing device, including the valve cover of being located on the valve body, drive end, hand wheel and valve rod, the pivot of hand wheel is linked through conical gear with valve rod in drive end, the top of drive end is passed through with valve rod and is equipped with counterforce component, and valve rod forms elastic cooperation with the top of drive end through the first spring of counterforce component, and the both ends of first spring are fixedly matched with the bottom of counterforce component and the top of drive end respectively, one side of drive end is equipped with limit component near the pivot of hand wheel, and the pivot of hand wheel is equipped with corresponding key groove in the appointed position, when hand wheel rotates to the appointed position, limit component and key groove form limit locking, further improve the stability of valve, and the valve opening is convenient.

Description

Technical Field

[0001] This utility model relates to the field of valve switching equipment technology, and in particular to a spring-assisted valve quick opening and closing device. Background Technology

[0002] An existing type of rising stem gate valve uses a handwheel to drive the valve stem to move up and down on the valve cover to open or close the gate. This relies on direct human operation, such as using a handwheel or wrench. For large-diameter valves, the valve needs to overcome the huge resistance generated by the medium pressure when opening the gate. This requires a large operating torque and high labor intensity, which can easily lead to operator fatigue or operational errors.

[0003] To avoid manual operation, some systems use electric motors, compressed air, or hydraulic systems for power. While these methods are labor-saving, they require an additional power source, have complex structures, are costly, and may fail in emergencies such as power outages, air supply failures, or vibrations, thus limiting their reliability. Utility Model Content

[0004] This utility model provides a spring-assisted valve quick opening and closing device, which aims to solve the problems mentioned above, such as the high resistance and inconvenience of manual opening of existing rising stem gate valves, and the poor stability in emergency situations when using electric opening.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A spring-assisted valve quick-opening and closing device includes a valve cover, a drive end, a handwheel, and a valve stem mounted on the valve body. The handwheel's shaft and the valve stem are linked within the drive end via a bevel gear. The valve stem passes through the top of the drive end and is equipped with a reaction force assembly. The valve stem is elastically engaged with the top of the drive end via a first spring in the reaction force assembly, and the two ends of the first spring are fixedly engaged with the bottom of the reaction force assembly and the top of the drive end, respectively. A limiting assembly is provided on the side of the drive end near the handwheel's shaft. The handwheel's shaft has a corresponding keyway at a designated position. When the handwheel rotates to the designated position, the limiting assembly and the keyway form a limiting lock.

[0006] Preferably, the tangential reaction force of the first spring is always less than the minimum torsional force required for the valve stem to rotate.

[0007] Preferably, the reaction force assembly includes a stop block that is threadedly engaged with the top valve stem. The stop block has a rotating handle that is detachably fixed in the radial direction of the valve stem. A first spring is sleeved on the valve stem between the drive end and the stop block, with one end of the first spring fixedly engaged with the top of the drive end and the other end of the first spring fixedly engaged with the bottom of the stop block.

[0008] Furthermore, the stop is a cylinder, and the stop is concentric and coaxial with the valve stem.

[0009] Furthermore, a limit nut is threaded onto the valve stem located on the side of the stop block away from the drive end, and the limit nut and the stop block form a limit engagement.

[0010] Furthermore, the end of the rotating handle is provided with a threaded head, and the stop block is provided with a threaded hole arranged radially along the valve stem, with the threaded head embedded in the corresponding threaded hole to form a threaded engagement.

[0011] Preferably, the limiting component includes a mounting plate detachably disposed on the top of the side of the drive end near the handwheel shaft and extending outward. The mounting plate is provided with a sliding box on the side directly above the handwheel shaft. A sliding key and a keyway are brakeably slidably engaged in the sliding box along the radial direction of the handwheel shaft to form a limiting engagement.

[0012] Furthermore, the mounting plate is fixedly engaged with the top of the drive end on the side near the drive end by several fasteners.

[0013] Furthermore, the sliding box has an opening on the side near the handwheel's shaft. The sliding key slides radially along the handwheel's shaft inside the sliding box and can slide out from the opening. A bearing is located in the middle of the side of the sliding key near the inside of the sliding box. A screw is threaded onto the side of the sliding box away from the opening. One end of the screw passes through the inside of the sliding box and has a rotating end. The rotating end forms a limiting rotation with the bearing. The other end of the screw is exposed outside the sliding box and has a handle.

[0014] Furthermore, a second spring is provided between the slide key and the side of the sliding box away from the opening, and the axis of the second spring is parallel to the sliding direction of the slide key.

[0015] The beneficial effects of this utility model are: 1. An elastic reaction force is formed between the valve stem and the drive end through the reaction force component. When the valve is in use, when the handwheel is turned to drive the valve stem to rotate downward, the reaction force component rotates and moves downward simultaneously. The first spring is compressed and enters the energy storage state while rotating. It provides axial reaction force through elasticity, so that the valve stem and the drive end are pressed together and enter the limit position. It can provide a reaction force to the valve stem when the valve is closed, and help the valve stem to remain stable. Even if there is a power failure or special circumstances, the valve stem can be guaranteed to have a certain degree of stability. 2. The first spring also provides tangential reaction force in the energy storage state. When the handwheel is turned to drive the valve stem to rotate upward, the reaction force component rotates upward synchronously. At this time, the tangential reaction force is in the same direction as the valve stem rotation, which can help to rotate the valve stem more quickly and smoothly, thereby opening the valve quickly. 3. When a limit is required, such as when the handwheel is rotated to the valve closed position, the keyway corresponds to the limit component. The limit component and the keyway can be used to limit and lock the handwheel rotation, thereby indirectly limiting the valve stem linked to the handwheel and ensuring stability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram showing the disassembly of the rotating handle of the reaction component of this utility model; Figure 3 This is an enlarged schematic diagram of the limiting component of this utility model when it is locked in place; Figure 4 This is an enlarged schematic diagram of the limiting component of this utility model when the limiting lock is released; Figure 5 This is a cross-sectional schematic diagram of the sliding box when the limiting component of this utility model is locked. In the diagram: 1. Valve body; 2. Valve cover; 3. Drive end; 4. Handwheel; 5. Valve stem; 6. Reaction assembly; 601. First spring; 602. Stop block; 603. Rotating handle; 604. Threaded head; 605. Threaded hole; 606. Limit nut; 7. Limiting assembly; 701. Mounting plate; 702. Fastener; 703. Sliding box; 704. Slide key; 705. Bearing; 706. Rotating end; 707. Screw; 708. Handle; 709. Second spring; 8. Keyway. Detailed Implementation

[0017] The embodiments will be further described below with reference to the accompanying drawings.

[0018] like Figures 1-5 As shown in the preferred embodiment 1, the spring-assisted valve quick-opening and closing device includes a valve cover 2, a drive end 3, a handwheel 4, and a valve stem 5 disposed on the valve body 1. The rotating shaft of the handwheel 4 and the valve stem 5 are linked in the drive end 3 through a bevel gear. The valve stem 5 passes through the top of the drive end 3 and is provided with a reaction force component 6. The valve stem 5 is elastically engaged with the top of the drive end 3 through a first spring 601 of the reaction force component 6, and the two ends of the first spring 601 are fixedly engaged with the bottom of the reaction force component 6 and the top of the drive end 3, respectively. A limiting component 7 is provided on the side of the drive end 3 near the rotating shaft of the handwheel 4. The rotating shaft of the handwheel 4 is provided with a corresponding keyway 8 at a designated position. When the handwheel 4 rotates to the designated position, the limiting component 7 and the keyway 8 form a limiting lock.

[0019] The reaction force assembly 6 creates an elastic reaction force between the valve stem 5 and the drive end 3. When the valve is in use, when the handwheel 4 is turned to drive the valve stem 5 to rotate downward, the reaction force assembly 6 rotates and moves downward simultaneously. The first spring 601 is compressed and enters an energy storage state while rotating, providing axial reaction force through elasticity, so that the valve stem 5 and the drive end 3 are pressed together and enter the limit position. It can provide a reaction force to the valve stem 5 when the valve is closed, helping the valve stem 5 to remain stable. Even if there is a power outage or special circumstances occur, the valve stem 5 can still have a certain degree of stability. The first spring 601 also provides tangential reaction force in the energy storage state. When the handwheel 4 is turned to drive the valve stem 5 to rotate upward, the reaction force component 6 rotates upward synchronously. At this time, the tangential reaction force is consistent with the rotation direction of the valve stem 5, which can help to rotate the valve stem 5 more quickly and smoothly, thereby opening the valve quickly. When a limit is required, such as when the handwheel 4 is rotated to the valve closed position, the keyway 8 corresponds to the limit component 7. The limit component 7 and the keyway 8 can be used to limit and lock the handwheel 4, thereby indirectly limiting the valve stem 5 linked to the handwheel 4 and ensuring stability.

[0020] In a preferred embodiment 2, the tangential reaction force of the first spring 601 is always less than the minimum torsional force required for the valve stem 5 to rotate, and the first spring 601 has a certain margin for torsional compression, which can be adjusted between valve opening and closing. This ensures that during the valve closing process, the tangential reaction force provided by the first spring 601 will not cause the valve stem 5 to rotate on its own. At the same time, the axial reaction force provided by the first spring 601 also strengthens the limiting effect of the valve stem 5 relative to the drive end 3, ensuring the stability of the valve stem 5.

[0021] In a preferred embodiment 3, the reaction force component 6 includes a stop block 602, which is threadedly engaged with the top valve stem 5. The stop block 602 has a rotating handle 603 detachably fixed in the radial direction of the valve stem 5. A first spring 601 is sleeved on the valve stem 5 between the drive end 3 and the stop block 602, with one end of the first spring 601 fixedly engaged with the top of the drive end 3 and the other end of the first spring 601 fixedly engaged with the bottom of the stop block 602.

[0022] Before use, the position of the stop block 602 can be changed by rotating the handle 603 to rotate the stop block 602 around the valve stem 5, and the pre-compression degree of the first spring 601 can be adjusted. When in use, the valve stem 5 rotates, causing the stop block 602 to rotate, thereby rotating and squeezing the first spring 601 to form a reaction force.

[0023] Preferably, the fixed fit can be achieved by welding.

[0024] In a more preferred embodiment 4, the stop 602 is a cylinder, and the stop 602 is concentric and coaxial with the valve stem 5. This further ensures stable force distribution and avoids excessive instability of the force on the valve stem 5, which would affect the stability of the valve.

[0025] In a more preferred embodiment 5, a limiting nut 606 is threaded onto the valve stem 5 located on the side of the stop 602 away from the drive end 3, forming a limiting engagement with the stop 602. In use, by controlling the limiting nut 606 to be tightly against the stop 602, the stop 602 can be further limited, preventing it from loosening under the influence of reaction force.

[0026] In a more preferred embodiment 6, the end of the rotating handle 603 is provided with a threaded head 604, and the stop block 602 is provided with a threaded hole 605 arranged radially along the valve stem 5. The threaded head 604 is embedded in the corresponding threaded hole 605 to form a threaded engagement. This allows the rotating handle 603 to be disassembled for convenient use.

[0027] As a preferred embodiment 7, the limiting component 7 includes a mounting plate 701 detachably disposed on the top side of the drive end 3 near the shaft of the handwheel 4 and extending outward. The mounting plate 701 is provided with a sliding box 703 on the side directly above the shaft of the handwheel 4. A sliding key 704 is brakeably slidably engaged with the keyway 8 in the sliding box 703 along the radial direction of the shaft of the handwheel 4 to form a limiting engagement.

[0028] There can be several keyways 8. When the handwheel 4 is rotated to the set position that needs to be limited, the keyways 8 are arranged and marked at the positions corresponding to the handwheel 4 and the limit component 7, such as opening or closing the gate. In use, when the handwheel 4 is rotated to the state corresponding to the keyway 8, the keyway 8 is exactly aligned with the limit component 7. By sliding the release key 704 to form a limit engagement with the keyway 8, the rotation shaft of the handwheel 4 can be locked with the drive end 3 and the valve cover 1, thereby indirectly locking the valve stem 5 and preventing the valve stem 5 from moving due to power failure, vibration or special circumstances, thus ensuring the stability of the valve.

[0029] In a more preferred embodiment 8, the mounting plate 701 is fixedly engaged with the top of the drive end 3 on the side near the drive end 3 by a plurality of fasteners 702. For example, four fasteners 702 ensure the fixed installation of the limiting component 7.

[0030] As a more preferred embodiment 9, the sliding box 703 has an opening on the side near the rotating shaft of the handwheel 4. The sliding key 704 slides radially along the rotating shaft of the handwheel 4 inside the sliding box 703 and can slide out from the opening. A bearing 705 is provided in the middle of the side of the sliding key 704 near the inside of the sliding box 703. A screw 707 is threadedly fitted on the side of the sliding box 703 away from the opening. One end of the screw 707 passes through the inside of the sliding box 703 and is provided with a rotating end 706. The rotating end 706 and the bearing 705 form a limited rotation. The other end of the screw 707 is exposed outside the sliding box 703 and is provided with a handle 708.

[0031] When locking is required, rotating the handle 708 drives the screw 707 to rotate and move downward. The screw 707 rotates in the bearing 705 through the rotating end 706, pushing the slide key 704 out of the sliding box 703 until the slide key 704 is embedded in the keyway 8 to complete the limit locking.

[0032] Preferably, the sliding box 703 is rectangular, the sliding key 704 is also rectangular, and the sliding key 704 is concentric and coaxial within the sliding box 703; The bearing 705 and the sliding key 704 share a central axis. The rotating end 706 is concentric and coaxial with the bearing 705. The rotating end 706 is welded to the end of the screw 707 and is concentric and coaxial with the screw 707. The handle 708 is welded to the other end of the screw 707 and is concentric and coaxial with the screw 707.

[0033] In a more preferred embodiment 10, a second spring 709 is provided between the slide key 704 and the side of the sliding box 703 away from the opening. The axis of the second spring 709 is parallel to the sliding direction of the slide key 704. As a buffer, the slide key 704 forms an elastic fit with the side of the sliding box 703 away from the opening during the sliding process, and provides a certain support force through the elastic force to ensure the stability of the slide key 704.

[0034] As a more preferred embodiment 11, only one second spring 709 may be provided, which is sleeved on the outside of the screw 707.

[0035] As a more preferred embodiment 12, the second spring 709 is provided in an even number, such as two, and is symmetrically arranged on both sides of the screw 707.

[0036] The working principle of this utility model: The reaction force assembly 6 creates an elastic reaction force between the valve stem 5 and the drive end 3. When the valve is in use, when the handwheel 4 is turned to drive the valve stem 5 to rotate downward, the reaction force assembly 6 rotates and moves downward simultaneously. The first spring 601 is compressed and enters an energy storage state while rotating, providing axial reaction force through elasticity, so that the valve stem 5 and the drive end 3 are pressed together and enter the limit position. It can provide a reaction force to the valve stem 5 when the valve is closed, helping the valve stem 5 to remain stable. Even if there is a power outage or special circumstances occur, the valve stem 5 can still have a certain degree of stability. The first spring 601 also provides tangential reaction force in the energy storage state. When the handwheel 4 is turned to drive the valve stem 5 to rotate upward, the reaction force component 6 rotates upward synchronously. At this time, the tangential reaction force is consistent with the rotation direction of the valve stem 5, which can help to rotate the valve stem 5 more quickly and smoothly, thereby opening the valve quickly. When a limit is required, such as when the handwheel 4 is rotated to the valve closed position, the keyway 8 corresponds to the limit component 7. The limit component 7 and the keyway 8 can be used to limit and lock the handwheel 4, thereby indirectly limiting the valve stem 5 linked to the handwheel 4 and ensuring stability.

Claims

1. A spring-assisted valve quick-opening and closing device, comprising a valve cover (2) disposed on a valve body (1), a drive end (3), a handwheel (4) and a valve stem (5), wherein the rotating shaft of the handwheel (4) and the valve stem (5) are linked within the drive end (3), characterized in that, The valve stem (5) passes through the top of the drive end (3) and is provided with a reaction force assembly (6). The valve stem (5) forms an elastic fit with the top of the drive end (3) through the first spring (601) of the reaction force assembly (6). The two ends of the first spring (601) are fixedly fitted with the bottom of the reaction force assembly (6) and the top of the drive end (3) respectively. A limiting assembly (7) is provided on the side of the drive end (3) near the rotating shaft of the handwheel (4). The rotating shaft of the handwheel (4) is provided with a corresponding keyway (8) at a designated position. When the handwheel (4) rotates to the designated position, the limiting assembly (7) and the keyway (8) form a limiting lock.

2. The spring-assisted valve quick-opening and closing device according to claim 1, characterized in that, The tangential reaction force of the first spring (601) is always less than the minimum torsional force required for the valve stem (5) to rotate.

3. The spring-assisted valve quick-opening and closing device according to claim 1, characterized in that, The reaction force assembly (6) includes a stop block (602), which is threadedly engaged with the top valve stem (5). The stop block (602) has a rotating handle (603) detachably fixed in the radial direction of the valve stem (5). A first spring (601) is sleeved on the valve stem (5) between the drive end (3) and the stop block (602), and one end of the first spring (601) is fixedly engaged with the top of the drive end (3), and the other end of the first spring (601) is fixedly engaged with the bottom of the stop block (602).

4. The spring-assisted valve quick-opening and closing device according to claim 3, characterized in that, The stop block (602) is a cylinder, and the stop block (602) and the valve stem (5) are concentric and coaxial.

5. The spring-assisted valve quick-opening and closing device according to claim 3, characterized in that, A limit nut (606) is threaded onto the valve stem (5) located on the side of the stop (602) away from the drive end (3), and the limit nut (606) and the stop (602) form a limit engagement.

6. The spring-assisted valve quick-opening and closing device according to claim 3, characterized in that, The end of the rotating handle (603) is provided with a threaded head (604), and the stop block (602) is provided with a threaded hole (605) arranged radially along the valve stem (5). The threaded head (604) is embedded in the corresponding threaded hole (605) to form a threaded fit.

7. The spring-assisted valve quick-opening and closing device according to claim 1, characterized in that, The limiting component (7) includes a mounting plate (701) that is detachably disposed on the top side of the drive end (3) near the shaft of the handwheel (4) and extends outward. The mounting plate (701) is provided with a sliding box (703) on the side directly above the shaft of the handwheel (4). A sliding key (704) and a keyway (8) are brakeably slidably fitted inside the sliding box (703) along the radial direction of the shaft of the handwheel (4) to form a limiting fit.

8. The spring-assisted valve quick-opening and closing device according to claim 7, characterized in that, The mounting plate (701) is fixedly engaged with the top of the drive end (3) on the side near the drive end (3) by a number of fasteners (702).

9. The spring-assisted valve quick-opening and closing device according to claim 7, characterized in that, The sliding box (703) has an opening on the side near the shaft of the handwheel (4). The sliding key (704) slides radially along the shaft of the handwheel (4) inside the sliding box (703) and can slide out from the opening. The sliding key (704) has a bearing (705) in the middle position on the side near the inside of the sliding box (703). The sliding box (703) is threaded with a screw (707) on the side away from the opening. One end of the screw (707) passes through the inside of the sliding box (703) and has a rotating end (706). The rotating end (706) and the bearing (705) form a limited rotation. The other end of the screw (707) is exposed outside the sliding box (703) and has a handle (708).

10. The spring-assisted valve quick-opening and closing device according to claim 7, characterized in that, A second spring (709) is provided between the slide key (704) and the side of the sliding box (703) away from the opening. The axis of the second spring (709) is parallel to the sliding direction of the slide key (704).

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