Stop valve with high sealing performance

Abstract

The utility model discloses a stop valve with high sealing performance, which relates to the technical field of stop valves and comprises a valve body and flange plates fixedly mounted at two ends of the valve body, the top of the valve body is in bolted connection with a fixing frame enabling a rotating handle to drive a valve rod to rotate, and the valve rod can be limited by the aid of a disc and a screw. The phenomenon that the valve rod is accidentally touched after being stopped is avoided, the use safety is improved, a plurality of inserting grooves are formed so that a screw can be conveniently inserted into the inserting grooves after the valve rod rotates, rotation of a limiting disc is facilitated, operation is convenient and fast, a round groove and a round base can be driven to rotate by rotating a rotating handle, and therefore rotation of the screw can be achieved; the limiting work can be conveniently carried out, the pull rope can prevent the screw from being lost, the ball and the arc-shaped groove can guide and limit the arc-shaped block, meanwhile, the arc-shaped block cannot rotate when the circular groove and the circular base rotate, and the anti-lost effect is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of gate valves, specifically a gate valve with high sealing performance. Background Technology

[0002] Gate valves, also known as stop valves, are the most widely used type of valve. They are popular because of the low friction between the sealing surfaces during opening and closing, making them durable. They also have a small opening height, are easy to manufacture, and are convenient to maintain. They are suitable not only for medium and low pressure but also for high pressure. The closing principle of a gate valve is to rely on the pressure of the valve stem to make the valve disc sealing surface and the valve seat sealing surface fit tightly together, thus preventing the flow of media.

[0003] A high-sealing welded gate valve, as disclosed in CN202220811918.4, includes a valve body with a cover plate fixed to the top. A sleeve is fixed at the center of the top of the cover plate, and a first threaded hole is formed at the center of the cover plate, communicating with the sleeve. The valve body has an inlet chamber, an outlet chamber, and a sealing chamber, both of which are connected to the sealing chamber. The cover plate is used to seal the sealing chamber, and the first threaded hole on the cover plate communicates with the sealing chamber. A first stud is threaded into the first threaded hole. This invention uses a sliding rod to move the first stud downwards, causing it to push two sealing plugs on a fixed plate downwards, achieving simultaneous sealing of the inlet and outlet chambers. This improves the sealing performance of the gate valve. The fixed plate pushes a slider to slide along two slide rails, further enhancing the sealing performance of the gate valve through their interaction.

[0004] The high-sealing welded gate valve proposed in the aforementioned patent can achieve sealing of the gate valve and make it open and close more quickly during use. However, the rotor on the gate valve is usually exposed to the external environment, making it easy for non-operators to accidentally touch the rotor, affecting the safety performance of the valve and failing to meet the requirements of daily use.

[0005] Therefore, we propose a high-sealing shut-off valve to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a gate valve with high sealing performance to solve the problem mentioned in the background art that the rotor on the gate valve is usually exposed to the external environment, making it easy for non-operators to accidentally touch the rotor, affecting the safety performance of the valve and failing to meet the requirements of daily use.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-sealing shut-off valve, comprising a valve body and flanges fixedly installed at both ends of the valve body, wherein a fixed frame is bolted to the top of the valve body to drive the valve stem to rotate, and a locking assembly is installed on the output end of the valve stem, and a rotating assembly is installed on the upper part of one side of the top of the valve body;

[0008] The locking assembly includes a disc fixedly sleeved on the output end of the valve stem and a screw inserted into the outside of the disc. An L-shaped plate is provided on one side of the disc. One side of the L-shaped plate is fixedly installed on the outer wall of one side of the valve body, and the end of the screw away from the disc extends movably through to the outside of the L-shaped plate.

[0009] Preferably, the outer side of the disk has several slots at equal intervals, and one end of the screw is inserted into the cavity of one of the slots.

[0010] Preferably, a threaded hole is provided on the outer wall of the inner side of the L-shaped plate, and the screw is threadedly connected to the L-shaped plate through the threaded hole.

[0011] Preferably, the rotating assembly includes two circular grooves located above one side of the top of the valve body and a circular seat fixedly installed between the circular grooves. An arc-shaped block is fitted to the bottom of the circular seat, and arc-shaped sliding blocks are fixedly installed on both sides of the arc-shaped block. The output ends of the arc-shaped sliding blocks extend into the inner cavity of the circular grooves respectively. A ball is rotatably installed on the opposite side of the arc-shaped sliding block, and an arc-shaped groove is opened on the inner wall of the inner cavity of the circular groove. The balls are slidably installed in the inner cavity of the arc-shaped groove respectively.

[0012] Preferably, a rotating handle is fixedly installed above the outer side of the circular groove on one side.

[0013] Preferably, a pull rope is fixedly installed at the bottom of the arc-shaped block, and a connecting block is fixedly installed at the end of the pull rope away from the arc-shaped block, with one side of the connecting block fixedly installed on the outer wall of one side of the L-shaped plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The disc and screw design can limit the valve stem, preventing accidental contact after use and improving safety. The multiple slots allow the screw to be inserted after the valve stem rotates, facilitating the rotation of the limiting disc and making operation convenient.

[0016] 2. By rotating the handle, the circular groove and circular seat can be rotated, thereby enabling the screw to rotate and facilitating the deployment of the limit switch. The pull rope prevents the screw from being lost, and the sphere and arc groove guide and limit the arc block, preventing it from rotating when the circular groove and circular seat rotate, thus preventing loss. Attached Figure Description

[0017] Figure 1 This is a perspective view of the entire utility model;

[0018] Figure 2 This is a left-side perspective view of the present invention;

[0019] Figure 3 This is a three-dimensional structural view of the card slot assembly of this utility model;

[0020] Figure 4 This is a partial cross-sectional perspective view of the circular groove of this utility model;

[0021] Figure 5 This is a partial sectional perspective view of the circular groove of this utility model;

[0022] Figure 6 This is a partial cross-sectional view of the L-shaped plate of this utility model;

[0023] Figure 7 For the present utility model Figure 5 Enlarged view of point A in the middle.

[0024] In the diagram: 1. Valve body; 2. Flange; 3. Rotary handle; 4. Valve stem; 5. Fixing bracket; 6. Positioning assembly; 61. Disc; 611. Slot; 62. Screw; 63. L-shaped plate; 631. Threaded hole; 7. Rotating assembly; 71. Circular groove; 711. Rotating handle; 72. Circular seat; 73. Arc-shaped block; 731. Pull rope; 732. Connecting block; 74. Arc-shaped sliding block; 75. Ball; 76. Arc-shaped groove. Detailed Implementation

[0025] 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.

[0026] Example 1: Please refer to Figure 1-6 This utility model provides a technical solution: a high-sealing shut-off valve, including a valve body 1 and flanges 2 fixedly installed at both ends of the valve body 1. A fixing frame 5 is bolted to the top of the valve body 1 to drive the valve stem 4 to rotate via a handle 3. A locking assembly 6 is installed on the output end of the valve stem 4. A rotating assembly 7 is installed on the top side of the valve body 1. The locking assembly 6 and the rotating assembly 7 can limit the valve stem 4 and prevent accidental contact.

[0027] The locking assembly 6 includes a disc 61 fixedly sleeved on the output end of the valve stem 4 and a screw 62 inserted into the outside of the disc 61. An L-shaped plate 63 is provided on one side of the disc 61. One side of the L-shaped plate 63 is fixedly installed on the outer wall of one side of the valve body 1. The end of the screw 62 away from the disc 61 extends movably through to the outside of the L-shaped plate 63. The valve stem 4 can be limited by the arrangement of the disc 61 and the screw 62.

[0028] The outer side of the disc 61 has several slots 611 at equal intervals, and one end of the screw 62 is inserted into the inner cavity of one of the slots 611. The slots 611 facilitate the insertion of the screw 62 and limit the position of the disc 61.

[0029] A threaded hole 631 is provided on the outer wall of the inner side of the L-shaped plate 63, and the screw 62 is threadedly connected to the L-shaped plate 63 through the threaded hole 631. The threaded hole 631 facilitates the rotation and movement of the screw 62.

[0030] Specifically, during use, the connection between the pipe and the valve body 1 can be made through the flange 2. After the connection is completed, it can be used. After use, the screw 62 can be rotated. When the screw 62 rotates, it can be moved through the threaded hole 631. When the screw 62 moves, it can be inserted into the inner cavity of one of the slots 611, thereby limiting the disc 61 and preventing accidental contact of the handle 3, thus improving the safety of use.

[0031] Example 2: Please refer to Figure 1-7 The rotating assembly 7 includes two circular grooves 71 located above one side of the top of the valve body 1 and a circular seat 72 fixedly installed between the circular grooves 71. An arc-shaped block 73 is fitted to the bottom of the circular seat 72, and an arc-shaped sliding block 74 is fixedly installed on both sides of the arc-shaped block 73. The output ends of the arc-shaped sliding blocks 74 extend into the inner cavity of the circular grooves 71. A ball 75 is rotatably installed on the opposite side of the arc-shaped sliding blocks 74. An arc-shaped groove 76 is opened on the inner wall of the inner cavity of the circular grooves 71, and the ball 75 is slidably installed in the inner cavity of the arc-shaped grooves 76. The arrangement of the arc-shaped sliding blocks 74 and the ball 75 facilitates the rotation of the circular grooves 71 and the circular seat 72, which facilitates the rotation of the screw 62 and prevents loss.

[0032] A rotating handle 711 is fixedly installed on the upper part of the outer side of the circular groove 71 on one side. The rotating handle 711 can drive the circular groove 71 to rotate.

[0033] A pull rope 731 is fixedly installed at the bottom of the arc-shaped block 73, and a connecting block 732 is fixedly installed at the end of the pull rope 731 away from the arc-shaped block 73. One side of the connecting block 732 is fixedly installed on the outer wall of one side of the L-shaped plate 63. The pull rope 731 and the connecting block 732 can be used to pull the arc-shaped block 73 and prevent the circular groove 71 from being lost.

[0034] Specifically, rotating the lever 711 drives the circular groove 71. When the circular groove 71 rotates, the screw 62 rotates. At the same time, the circular groove 71 also moves towards the side closer to the disc 61, which facilitates the deployment of the limiting operation. The circular groove 71 rotates around the arc block 73. The ball 75 and the arc groove 76 can reduce friction, making it easier for the circular groove 71 to rotate. At this time, the pull rope 731 can pull the arc block 73 to prevent the circular groove 71 and the screw 62 from being lost after use.

[0035] Working principle: During use, the connection between the pipe and the valve body 1 can be made through the flange 2. After the connection is completed, it can be used. By rotating the handle 711, the circular groove 71 can be rotated. When the circular groove 71 rotates, the screw 62 will rotate. While rotating, the circular groove 71 will also move towards the side closer to the disc 61. The circular groove 71 will rotate around the arc block 73, while the arc groove 76 will rotate outside the ball 75. At this time, the pull rope 731 can pull the arc block 73. When the screw 62 rotates, it can be driven to rotate through the threaded hole 631 and move at the same time. When the screw 62 moves, it can be inserted into the inner cavity of one of the slots 611, thereby limiting the disc 61 and preventing accidental collision of the handle 3, thus improving the safety of use.

[0036] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-sealing gate valve, comprising a valve body (1) and flanges (2) fixedly mounted at both ends of the valve body (1), characterized in that, The top of the valve body (1) is bolted to a fixed frame (5) that causes the handle (3) to drive the valve stem (4) to rotate, and a locking assembly (6) is installed on the output end of the valve stem (4), and a rotating assembly (7) is installed on the top side of the valve body (1). The locking assembly (6) includes a disc (61) fixedly sleeved on the output end of the valve stem (4) and a screw (62) inserted into the outside of the disc (61). An L-shaped plate (63) is provided on one side of the disc (61). One side of the L-shaped plate (63) is fixedly installed on the outer wall of one side of the valve body (1). The end of the screw (62) away from the disc (61) extends movably through to the outside of the L-shaped plate (63).

2. The high-sealing shut-off valve according to claim 1, characterized in that: The outer side of the disc (61) is provided with a number of slots (611) at equal intervals, and one end of the screw (62) is inserted into the cavity of one of the slots (611).

3. The high-sealing shut-off valve according to claim 1, characterized in that: A threaded hole (631) is provided on the outer wall of the inner side of the L-shaped plate (63), and the screw (62) is threadedly connected to the L-shaped plate (63) through the threaded hole (631).

4. A high-sealing shut-off valve according to claim 1, characterized in that: The rotating assembly (7) includes two circular grooves (71) located above one side of the top of the valve body (1) and a circular seat (72) fixedly installed between the circular grooves (71). An arc-shaped block (73) is fitted to the bottom of the circular seat (72), and an arc-shaped sliding block (74) is fixedly installed on both sides of the arc-shaped block (73). The output end of the arc-shaped sliding block (74) extends into the inner cavity of the circular groove (71). A ball (75) is rotatably installed on the opposite side of the arc-shaped sliding block (74), and an arc-shaped groove (76) is opened on the inner wall of the inner cavity of the circular groove (71). The balls (75) are slidably installed in the inner cavity of the arc-shaped groove (76).

5. A high-sealing shut-off valve according to claim 4, characterized in that: A rotating handle (711) is fixedly installed above the outer side of the circular groove (71) on one side.

6. A high-sealing shut-off valve according to claim 4, characterized in that: A pull rope (731) is fixedly installed at the bottom of the arc-shaped block (73), and a connecting block (732) is fixedly installed at the end of the pull rope (731) away from the arc-shaped block (73). One side of the connecting block (732) is fixedly installed on the outer wall of one side of the L-shaped plate (63).

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