Throttling stop valve

Abstract

The utility model relates to the technical field of stop valves, in particular to a throttling stop valve which comprises two connecting flange plates, a water conveying valve pipe, a stop table, a supporting table, a stop mechanism and an auxiliary fixing structure. The two connecting flange plates are welded and fixed to ensure that the water delivery valve pipe is stable. A stop table is fixed on the inner wall of the water delivery valve pipe, and a support table is fixed on the top to provide a stable foundation. The cut-off mechanism is composed of a supporting sleeve, a worm gear, a worm, a connecting shaft, a cut-off block and an anti-skid ring, the supporting sleeve is fixed to the supporting table, the top of the supporting sleeve is sleeved with the worm gear, and the worm is installed on one side of the worm gear. A meshing self-locking structure prevents the connecting shaft from rotating under external force, and throttling stability is improved. A stop block is fixed at the bottom of the connecting shaft, an anti-skid ring is fixed at the top, and the supporting table is slidably connected, so that operation convenience and safety are enhanced. The auxiliary fixing structure comprises a limiting frame, a clamping block, a non-slip mat and a driving mechanism, the clamping block is slidably installed, the non-slip mat is fixed to one side, and the driving mechanism is arranged on the other side. All the structures are used in cooperation, the external force interference resistance is enhanced, and leakage is prevented.

Description

Technical Field

[0001] This utility model relates to the field of shut-off valve technology, specifically a throttling shut-off valve. Background Technology

[0002] Gate valves, as an important type of shut-off valve, are widely used in aerospace, petrochemical, and power industries. Their main function is to achieve media shut-off, connection, and flow regulation through the rising and falling motion of the opening and closing element (valve disc). In the aerospace field, gate valves are one of the core components of spacecraft equipment, undertaking the critical tasks of media transportation, shut-off, and regulation. The sealing performance of gate valves directly affects the safety and reliability of equipment, especially under high pressure, high temperature, and high precision conditions, where the quality of sealing performance can directly impact the success or failure of the mission. Therefore, studying the sealing characteristics of typical gate valves and their influencing factors, and revealing their influencing laws, is of great guiding significance for optimizing the structural design of valve sealing pairs and improving valve sealing performance and reliability.

[0003] In existing technologies, some throttling valves use a rotating threaded rod to drive the valve disc downwards, thereby blocking the pipeline and achieving a rapid throttling effect. However, traditional throttling valve designs generally lack auxiliary fixing devices, which to some extent limits the stability of the throttling process. Especially under complex operating conditions, such as high pressure, high flow velocity, or vibration environments, the movement of the valve disc may be affected by external interference, leading to unstable throttling effects and even leakage. Utility Model Content

[0004] The purpose of this invention is to provide a throttling shut-off valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a throttling shut-off valve, comprising: two connecting flanges, a water supply valve pipe welded and fixed between the two connecting flanges, a shut-off platform fixedly connected to the inner wall of the water supply valve pipe, a support platform fixedly connected to the top of the water supply valve pipe, a shut-off mechanism provided on the upper side of the support platform, and an auxiliary fixing structure provided on the upper side of the shut-off mechanism.

[0006] The stopping mechanism includes a support sleeve, the bottom of which is fixedly connected to a support platform. A worm gear is rotatably fitted on the top of the support sleeve, and a worm is rotatably installed on one side of the worm gear. A connecting shaft is threaded into the worm gear. The bottom of the connecting shaft is fixedly connected to the stopping block. An anti-slip ring is fixedly fitted on the outer ring surface of the top of the connecting shaft. The connecting shaft is slidably connected to the support platform.

[0007] The auxiliary fixing structure includes a limiting frame fixedly installed on one side of the support platform. Clamping blocks are symmetrically slidably installed on one side of the top of the limiting frame. Anti-slip pads are fixedly connected to the side of the clamping blocks near the anti-slip ring. A driving mechanism is provided on the other side of the top of the limiting frame.

[0008] Preferably, a limiting cover is fixedly connected to the lower surface of the worm gear, the limiting cover is rotatably sleeved on the top of the support sleeve, the two sides of the worm are rotatably connected to the top of the support seat, and the bottom of the support seat is fixedly connected to the top of the water supply valve pipe.

[0009] Preferably, a lower handwheel is fixedly sleeved at one end of the worm gear, and the stop block is slidably installed on the inner wall of the water supply valve pipe.

[0010] Preferably, the bottom of the limiting frame is fixedly connected to the upper surface of the water supply valve pipe, the upper surface of the limiting frame is fixedly connected to a limiting rail, and the bottom of the clamping block is slidably connected to the limiting frame through the limiting rail.

[0011] Preferably, the drive mechanism includes a handwheel, which is fixedly connected to one end of a threaded rod, and the other end of the threaded rod is fixedly connected to one end of a connecting rod. The other end of the connecting rod is fixedly sleeved on the inner ring surface of the limit bearing, and the outer ring surface of the limit bearing is fixedly connected to one side of the drive block.

[0012] Preferably, the other side of the drive block is rotatably connected to one end of the connecting plate via a pin, the other end of the connecting plate is rotatably connected to the clamping block via a pin, the drive block is slidably connected to the limiting frame via a limiting rail, and the threaded rod is threadedly sleeved on the top of the limiting frame away from the clamping block.

[0013] Compared with existing technologies, the advantages of this invention are as follows: First, the self-locking structure of the worm gear and worm effectively prevents the connecting shaft from rotating under external force, thereby improving the stability of the throttling process. Second, the auxiliary fixing structure, including a limit frame, clamping block, and anti-slip pad, further enhances the device's resistance to vibration and external interference, reduces the risk of leakage caused by external factors, and further improves the stability of throttling. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a top view of the overall structure of this utility model;

[0016] Figure 3 This is a bottom view of the overall structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of this utility model;

[0018] Figure 5 This is a cross-sectional view of the internal structure of this utility model.

[0019] In the diagram: 1. Connecting flange; 2. Water supply valve pipe; 3. Stop platform; 4. Support platform; 5. Support sleeve; 6. Worm gear; 7. Worm; 8. Connecting shaft; 9. Stop block; 10. Anti-slip ring; 11. Limiting frame; 12. Clamping block; 13. Anti-slip pad; 14. Limiting cover; 15. Support base; 16. Lower handwheel; 17. Limiting rail; 18. Upper handwheel; 19. Threaded rod; 20. Connecting rod; 21. Limiting bearing; 22. Drive block; 23. Connecting plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Example 1: Please refer to Figures 1-5 This utility model provides a technical solution: a throttling shut-off valve, comprising: two connecting flanges 1, which facilitate the connection of a water supply valve pipe 2 to an external pipeline; a water supply valve pipe 2 welded and fixed between the two connecting flanges 1, the water supply valve pipe 2 being used for water delivery; a shut-off platform 3 fixedly connected to the inner wall of the water supply valve pipe 2, the shut-off platform 3 limiting the stop block 9; a support platform 4 fixedly connected to the top of the water supply valve pipe 2, a shut-off mechanism provided on the upper side of the support platform 4, the shut-off mechanism being used to control the connection of the water passage inside the water supply valve pipe 2; an auxiliary fixing structure provided on the upper side of the shut-off mechanism, the auxiliary fixing mechanism being used to assist in fixing the device and improve throttling stability; the shut-off mechanism includes a support sleeve 5, the bottom of the support sleeve 5 being fixedly connected to the support platform 4, and a rotatable sleeve on the top of the support sleeve 5. The worm gear 6 and the support sleeve 5 provide limiting support for the worm gear 6, thereby improving its stability during rotation. A worm 7 is rotatably installed on one side of the worm gear 6. A connecting shaft 8 is threaded onto the worm gear 6. The bottom of the connecting shaft 8 is fixedly connected to the stop block 9. An anti-slip ring 10 is fixedly sleeved on the outer ring surface of the top of the connecting shaft 8. The connecting shaft 8 is slidably connected to the support platform 4. The support platform 4 further limits the connection of the connecting shaft 8. The auxiliary fixing structure includes a limiting frame 11 fixedly installed on one side of the support platform 4. A clamping block 12 is symmetrically slidably installed on one side of the top of the limiting frame 11. An anti-slip pad 13 is fixedly connected to the side of the clamping block 12 near the anti-slip ring 10. A driving mechanism is provided on the other side of the top of the limiting frame 11. The driving mechanism is used to drive the two clamping blocks 12 to move towards or away from each other, so that the anti-slip pad 13 fixedly connected on the clamping block 12 is in contact with or separated from the anti-slip ring 10.

[0022] In use, the operator uses the connecting flanges 1 on both sides of the water supply valve pipe 2 to fix the water supply valve pipe 2 to the external pipeline with matching bolts and nuts. Then, the operator twists the worm gear 7, causing the worm gear 7 to mesh with the worm wheel 6. The worm wheel 6 rotates under the limitation of the support sleeve 5. Since the worm wheel 6 is threadedly connected to the upper side of the connecting shaft 8, it drives the connecting shaft 8 to move along its axis under the limitation of the support platform 4. When the connecting shaft 8 drives the stop block 9 to move downward, the stop block 9 gradually abuts against the stop platform 3, thereby blocking the stop platform 3 and stopping the water flow. When the worm gear 7 is twisted in the opposite direction, the connecting shaft 8 then drives the stop block. 9 moves upward, causing the stop block 9 to gradually move away from the stop platform 3, thus allowing water to flow through. Through the meshing and self-locking between the worm gear 7 and the worm wheel 6, the rotation of the connecting shaft 8 is initially effectively prevented, improving the throttling stability. After adjustment, the two clamping blocks 12, which are slidably mounted on the top of the limit frame 11, move towards each other through the drive mechanism. The clamping blocks 12 then drive the anti-slip pad 13 to gradually come into close contact with the outer surface of the anti-slip ring 10. Thus, through the friction between the anti-slip pad 13 and the anti-slip ring 10, the rotation of the connecting shaft 8 is effectively prevented when subjected to external force, further improving the stability of the mechanical system and achieving auxiliary fixation of the device.

[0023] Example 2: Based on Example 1, a limiting cover 14 is fixedly connected to the lower surface of the worm gear 6. The limiting cover 14 is rotatably sleeved on the top of the support sleeve 5. The two sides of the worm 7 are rotatably connected to the top of the support base 15. The bottom of the support base 15 is fixedly connected to the top of the water supply valve pipe 2. The stability of the worm gear 6 during rotation is improved by the sliding sleeve between the support sleeve 5 and the limiting cover 14. The stability of the worm 7 during rotation is improved by limiting the worm 7 through the support base 15. A lower handwheel 16 is fixedly sleeved on one end of the worm 7. The stop block 9 is slidably installed on the inner wall of the water supply valve pipe 2. The worm 7 can be rotated by twisting the lower handwheel 16, thereby improving the convenience of operation.

[0024] Example 3: Based on Example 2, the bottom of the limiting frame 11 is fixedly connected to the upper surface of the water supply valve pipe 2, and a limiting rail 17 is fixedly connected to the upper surface of the limiting frame 11. The bottom of the clamping block 12 is slidably connected to the limiting frame 11 through the limiting rail 17. The driving mechanism includes a handwheel 18, which is fixedly connected to one end of the threaded rod 19, so that the threaded rod 19 can be rotated by twisting the handwheel 18. The other end of the threaded rod 19 is fixedly connected to one end of the connecting rod 20. One end is fixedly sleeved on the inner ring surface of the limit bearing 21. The outer ring surface of the limit bearing 21 is fixedly connected to one side of the drive block 22. The limit bearing 21 adopts an installation method in which the inner ring rotates and the outer ring is fixed. The other side of the drive block 22 is rotatably connected to one end of the connecting plate 23 through a pin. The other end of the connecting plate 23 is rotatably connected to the clamping block 12 through a pin. The drive block 22 is slidably connected to the limit frame 11 through the limit rail 17. The threaded rod 19 is threadedly sleeved on the top of the limit frame 11 on the side away from the clamping block 12.

[0025] After the stop block 9 is adjusted, in the initial state, the clamping blocks 12 are away from both sides of the connecting shaft 8. By turning the upper handwheel 18, the upper handwheel 18 drives the threaded rod 19 to rotate. Since the threaded rod 19 is threadedly connected to one end of the limit frame 11, the threaded rod 19 will move horizontally along its axis, which will then drive the connecting rod 20 to rotate and move laterally. Under the connection limit of the limit bearing 21, the connecting rod 20 will drive the drive block 22 to move under the limit of the limit rail 17. When the drive block 22 moves away from the connecting shaft 8... During operation, with the connecting plate 23 rotating in connection with the pin, the connecting plate 23 pulls the clamping block 12, which is rotatably connected to it, towards the connecting shaft 8 until the clamping block 12 drives the anti-slip pad 13 to come into close contact with the anti-slip ring 10. The anti-slip pad 13 is made of soft material, which can prevent the clamping block 12 from directly contacting the top outer surface of the connecting shaft 8, thereby reducing scratches or wear on the connecting shaft 8 and thus achieving auxiliary fixation of the device. When the driving block 22 moves towards the connecting shaft 8, the anti-slip pad 13 can be released from its position on the connecting shaft 8.

[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 throttling stop valve comprising connecting flanges (1) in the number of two, characterized in that: Two said connecting flanges (1) between the welding and fixed water valve pipe (2), water valve pipe (2) inner wall fixedly connected with the cutoff platform (3), water valve pipe (2) top fixedly connected with the support platform (4), the support platform (4) upper side is provided with a stop mechanism, the stop mechanism upper side is provided with an auxiliary fixing structure; The stop mechanism includes a support sleeve (5), the bottom of the support sleeve (5) is fixedly connected with the support platform (4), the top of the support sleeve (5) is rotatably sleeved with a worm wheel (6), one side of the worm wheel (6) is rotatably installed with a worm (7), the worm wheel (6) is internally threadedly sleeved with a connecting shaft (8), the bottom of the connecting shaft (8) is fixedly connected with a cutoff block (9), the outer circle surface of the top of the connecting shaft (8) is fixedly sleeved with an antiskid ring (10), and the connecting shaft (8) is slidably connected with the support platform (4); The auxiliary fixing structure includes a limiting frame (11) fixedly arranged on one side of the support platform (4), the limiting frame (11) is symmetrically slidably installed with a clamping block (12) on one side of the top, the clamping block (12) is fixedly connected with an antiskid pad (13) on the side close to the antiskid ring (10), and the limiting frame (11) is provided with a driving mechanism on the other side of the top.

2. A throttling stop valve according to claim 1, characterised in that: The lower surface of the worm wheel (6) is fixedly connected with a limiting cover (14), the limiting cover (14) is rotatably sleeved on the top of the support sleeve (5), the worm (7) is rotatably connected with the top of a support base (15) on both sides, and the bottom of the support base (15) is fixedly connected with the top of the water valve pipe (2).

3. A throttling stop valve according to claim 2, characterised in that: One end of the worm (7) is fixedly sleeved with a lower hand wheel (16), and the cutoff block (9) is slidably installed on the inner wall of the water valve pipe (2).

4. A throttling stop valve according to claim 1, characterized in that: The bottom of the limiting frame (11) is fixedly connected with the upper surface of the water valve pipe (2), the upper surface of the limiting frame (11) is fixedly connected with a limiting rail (17), and the bottom of the clamping block (12) is slidably connected between the limiting rail (17) and the limiting frame (11).

5. A throttling stop valve according to claim 1, characterized in that: The driving mechanism includes an upper hand wheel (18), the upper hand wheel (18) is fixedly connected with one end of a threaded rod (19), the other end of the threaded rod (19) is fixedly connected with one end of a connecting rod (20), the other end of the connecting rod (20) is fixedly sleeved in the inner circle surface of a limiting bearing (21), and the outer circle surface of the limiting bearing (21) is fixedly connected with one side of a driving block (22).

6. A throttling stop valve according to claim 5, characterised in that: The other side of the driving block (22) is rotatably connected with one end of a connecting plate (23) through a pin shaft, the other end of the connecting plate (23) is rotatably connected with the clamping block (12) through a pin shaft, the driving block (22) is slidably connected between the limiting rail (17) and the limiting frame (11), and the threaded rod (19) is threadedly sleeved on the top of the limiting frame (11) away from the clamping block (12).

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