Gate valve with locking function

Abstract

The utility model discloses a gate valve with a locking function, which belongs to the technical field of gate valves and comprises a gate valve body, a gate plate is slidably mounted in the gate valve body, and a threaded rod is rotatably mounted at the top of the gate plate. A transmission assembly is further included, the transmission assembly comprises a transmission seat, the center of the transmission seat is in threaded connection with the threaded rod, and the bottom of the transmission seat is rotationally matched with the top of the supporting column; the spring, the limiting block and the limiting groove are matched for use, the structure is simple, convenience and practicability are achieved, the hand wheel is disconnected from the transmission base when not used, the hand wheel is prevented from being touched by mistake to drive the gate plate to move, the gate valve body is prevented from being opened accidentally, and liquid or gas conveyed in a pipeline is prevented from leaking; and the gate valve body can be opened and closed by inserting the limiting block into the limiting groove by pressing the hand wheel, operation is easy, and an operator can use the gate valve conveniently.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically a gate valve with a locking function. Background Technology

[0002] Gate valves have a relatively compact structure, are easy to manufacture and maintain, and have relatively low cost, making them widely used in various engineering fields. Because the passage of a gate valve is straight, the fluid flow direction hardly changes as it passes through, resulting in low fluid resistance. When fully open, the entire flow path is straight, minimizing pressure loss during medium operation. A gate valve is an opening and closing element consisting of a gate, whose movement direction is perpendicular to the fluid direction. Gate valves can only be fully open or fully closed; they cannot be used for regulation or throttling. Gate valves achieve sealing through the contact between the valve seat and the gate. Typically, the sealing surface is overlaid with metal material to increase wear resistance. Gates can be rigid or resilient; based on the type of gate, gate valves are classified as rigid gate valves or resilient gate valves.

[0003] A search revealed that Chinese Patent Publication No. CN222010980U discloses a gate valve, relating to the field of valve technology. The valve valve includes a valve body, comprising a lower valve body and an upper valve body. A third sealing gasket is embedded in the top of the lower valve body. An adjusting component is fitted inside the support member. A disc is fixed inside the lower valve body. A gate plate is fitted inside the lower valve body and the disc. A threaded hole is opened in the top of the gate plate. First sealing gaskets are embedded in the sides and bottom of the gate plate. By configuring the gate plate, the first sealing gasket, and the third sealing gasket, when fluid is blocked, the handwheel rotates, driving the screw to rotate, causing the gate plate to move downwards along the slot, thus locking the gate plate inside the disc. Simultaneously, the first sealing gaskets embedded in the bottom and sides of the gate plate further enhance the sealing performance between the gate plate and the disc, preventing fluid from flowing through the flow hole of the disc. The third sealing gasket on the top of the lower valve body prevents fluid from flowing into the upper valve body, further enhancing the sealing performance and providing a good blocking effect.

[0004] However, this device also has the following drawbacks:

[0005] The handwheel of the gate valve may be rotated due to external force, causing the gate valve to open. It may also be accidentally opened by non-professionals. Accidental opening of the gate valve may cause leakage of liquid or gas transported in the pipeline. This device does not solve this problem. Utility Model Content

[0006] The purpose of this utility model is to provide a gate valve with a locking function. By setting a spring, a limiting block and a limiting groove in combination, the handwheel is disconnected from the transmission seat when not in use, preventing the handwheel from being accidentally touched and causing the gate plate to move, thereby preventing the gate valve body from being opened accidentally and avoiding leakage of liquid or gas transported in the pipeline, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A gate valve with a locking function includes a gate valve body, a gate plate slidably mounted inside the gate valve body, and a threaded rod rotatably mounted on the top of the gate plate;

[0009] It also includes a transmission assembly, which includes a transmission seat. The center of the transmission seat is threadedly connected to the threaded rod. The bottom of the transmission seat is rotatably engaged with the top of the support column. The top of the transmission seat is slidably installed in the mounting groove opened at the center of the bottom of the handwheel. A spring is installed inside the mounting groove. Four sets of limiting blocks are fixedly installed around the transmission seat. Limiting grooves are opened in the inner wall of the mounting groove. The limiting blocks are slidably engaged with the limiting grooves.

[0010] Preferably, a limiting ring is fixedly installed at the bottom of the transmission seat, and a rotating groove is provided at the top of the support column, with the limiting ring rotatably engaging with the rotating groove.

[0011] Preferably, two sets of clamping screws are threaded on both sides of the top of the support column, and one end of the clamping screw abuts against the limiting ring.

[0012] Preferably, a limiting plate is fixedly installed on the top of the transmission seat, and the limiting plate slides in conjunction with the mounting groove.

[0013] Preferably, one end of the spring abuts against the limiting plate, and the other end of the spring abuts against the top of the mounting groove.

[0014] Preferably, the handwheel has a through hole at its top center, and the threaded rod slides with the through hole with clearance.

[0015] Preferably, the bottom of the support column is fixedly connected to the gate valve body, and the threaded rod is slidably engaged with the gate valve body and the support column.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model uses a combination of springs, limit blocks, and limit grooves, resulting in a simple and convenient structure. It disconnects the handwheel from the transmission seat when not in use, preventing accidental activation of the gate valve and thus preventing unintended opening of the gate valve body. This avoids leakage of liquids or gases transported in the pipeline. Furthermore, pressing the handwheel allows the limit block to insert into the limit groove, enabling the gate valve body to be opened and closed. The operation is simple and convenient for operators. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the handwheel;

[0020] Figure 3 This is a schematic diagram of the explosion separation structure of the transmission seat and the support column.

[0021] In the diagram: 1. Gate valve body; 2. Gate plate; 3. Threaded rod; 4. Transmission seat; 5. Support column; 6. Handwheel; 7. Mounting groove; 8. Spring; 9. Limit block; 10. Limit groove; 11. Limit ring; 12. Rotation groove; 13. Tightening screw; 14. Limit plate; 15. Through hole. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-3 This utility model provides a technical solution:

[0024] A gate valve with a locking function includes a gate valve body 1, a gate plate 2 slidably mounted inside the gate valve body 1, a threaded rod 3 rotatably mounted on the top of the gate plate 2, and a transmission assembly including a transmission seat 4. The center of the transmission seat 4 is threadedly connected to the threaded rod 3, the bottom of the transmission seat 4 is rotatably engaged with the top of the support column 5, the top of the transmission seat 4 is slidably mounted in an installation groove 7 opened at the bottom center of a handwheel 6, the bottom of the support column 5 is fixedly connected to the gate valve body 1, and the threaded rod 3 is slidably engaged with the gate valve body 1 and the support column 5.

[0025] By setting the handwheel 6, rotating the handwheel 6 can drive the transmission seat 4 to rotate, thereby causing the threaded rod 3 to move up and down. The up and down moving threaded rod 3 drives the gate plate 2 to move up and down, thereby opening or closing the gate valve body 1.

[0026] A spring 8 is installed inside the mounting groove 7. One end of the spring 8 abuts against the limiting plate 14, and the other end of the spring 8 abuts against the top of the mounting groove 7. Four sets of limiting blocks 9 are fixedly installed around the transmission seat 4. A limiting groove 10 is opened in the inner wall of the mounting groove 7. The limiting block 9 slides with the limiting groove 10. The limiting plate 14 is fixedly installed on the top of the transmission seat 4. The limiting plate 14 slides with the mounting groove 7. A through hole 15 is opened in the center of the top of the handwheel 6. The threaded rod 3 slides with the through hole 15.

[0027] By using the spring 8, limit block 9, and limit groove 10 in conjunction, the handwheel 6 can be disconnected from the transmission seat 4 when not in use, preventing the handwheel 6 from being accidentally touched and causing the gate plate 2 to move, thereby preventing the gate valve body 1 from being opened accidentally and avoiding leakage of liquid or gas transported in the pipeline. When it is necessary to open or close the gate valve body 1, the limit block 9 can be inserted into the limit groove 10 by pressing the handwheel 6. The operation is simple and convenient for operators to use.

[0028] A limiting ring 11 is fixedly installed at the bottom of the transmission seat 4, and a rotating groove 12 is opened at the top of the support column 5. The limiting ring 11 and the rotating groove 12 are rotatably engaged. Two sets of clamping screws 13 are threaded on both sides of the top of the support column 5, and one end of the clamping screw 13 abuts against the limiting ring 11.

[0029] By using the limit ring 11 and the rotating groove 12 together, the transmission seat 4 can be rotated normally while preventing the transmission seat 4 from separating from the support column 5, ensuring that the operator can open and close the gate valve normally. Furthermore, by setting the tightening screw 13, the transmission seat 4 can be further prevented from rotating unexpectedly.

[0030] In practical use, the device is installed in the designated position. The operator can rotate the handwheel 6 to align the limit block 9 with the limit groove 10 and press down the handwheel 6. The handwheel 6 moves downward, and the limit groove 10 fits into the limit block 9, compressing the spring 8 at the same time. Then, the handwheel 6 is rotated, which drives the transmission seat 4 to rotate. The rotating transmission seat 4 causes the threaded rod 3 to move up or down, thereby causing the gate plate 2 to move up and down, thus opening or closing the gate valve body 1. After the operation is completed, the handwheel 6 is released, and the compressed spring 8 returns to its original position, pushing the handwheel 6 upward, causing the limit groove 10 to disengage from the limit block 9, thereby preventing the transmission seat 4 from rotating. In addition, the operator can tighten the two sets of locking screws 13 to further prevent the transmission seat 4 from rotating accidentally.

[0031] 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 gate valve with a locking function, characterized in that: Includes a gate valve body (1), a gate plate (2) is slidably installed inside the gate valve body (1), and a threaded rod (3) is rotatably installed on the top of the gate plate (2); It also includes a transmission assembly, which includes a transmission seat (4), the center of which is threadedly connected to the threaded rod (3), the bottom of which is rotatably engaged with the top of the support column (5), the top of which is slidably installed in the mounting groove (7) opened at the bottom center of the handwheel (6), a spring (8) is provided inside the mounting groove (7), four sets of limiting blocks (9) are fixedly installed around the transmission seat (4), and a limiting groove (10) is opened on the inner wall of the mounting groove (7), and the limiting block (9) and the limiting groove (10) are slidably engaged.

2. A gate valve with a locking function according to claim 1, characterized in that: A limiting ring (11) is fixedly installed at the bottom of the transmission seat (4), and a rotating groove (12) is provided at the top of the support column (5). The limiting ring (11) and the rotating groove (12) are rotatably engaged.

3. A gate valve with a locking function according to claim 2, characterized in that: Two sets of clamping screws (13) are threaded on both sides of the top of the support column (5), and one end of the clamping screw (13) abuts against the limiting ring (11).

4. A gate valve with a locking function according to claim 1, characterized in that: A limiting plate (14) is fixedly installed on the top of the transmission seat (4), and the limiting plate (14) slides in conjunction with the mounting groove (7).

5. A gate valve with a locking function according to claim 1, characterized in that: One end of the spring (8) abuts against the limiting plate (14), and the other end of the spring (8) abuts against the top of the mounting groove (7).

6. A gate valve with a locking function according to claim 1, characterized in that: The handwheel (6) has a through hole (15) at the top center, and the threaded rod (3) slides with the through hole (15) with a clearance fit.

7. A gate valve with a locking function according to claim 1, characterized in that: The bottom of the support column (5) is fixedly connected to the gate valve body (1), and the threaded rod (3) is slidably engaged with the gate valve body (1) and the support column (5).

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