CN219606083U

CN219606083U - Gate valve

Info

Publication number: CN219606083U
Application number: CN202320451548.2U
Authority: CN
Inventors: 王林荣
Original assignee: Wenzhou Dia Fluid Equipment Co ltd
Current assignee: Wenzhou Dia Fluid Equipment Co ltd
Priority date: 2023-03-06
Filing date: 2023-03-06
Publication date: 2023-08-29
Anticipated expiration: 2033-03-06

Abstract

The utility model discloses a gate valve, which is characterized in that the gate valve comprises a valve body, wherein a valve cavity is arranged in the valve body, sealing pairs are arranged on two sides of the valve cavity, and a valve plate assembly is arranged in the valve cavity; the sealing device also comprises a driving assembly, wherein when the sealing plates descend, the driving assembly controls the two sealing plates to move towards the sealing pair until the sealing pair is attached to the sealing plates; the mounting plate is also connected with a valve rod in a threaded manner, and the valve rod is rotationally connected with the valve body; the sealing plates are arranged on two sides of the mounting plate in a horizontal sliding mode, when the joint surfaces of the sealing plates and the sealing pairs are worn to cause the joint to be not tight, the sealing plates can be controlled to slide towards the sealing pairs, gaps between the sealing plates and the sealing pairs are compensated, and sealing effect after closing is guaranteed.

Description

Gate valve

Technical Field

The utility model relates to the technical field of gate valves, in particular to a gate valve.

Background

Gate valves are currently the most important type of valves and are widely used for the circulation and stopping of liquid, gas, dust and other media. Typically, the gate valve includes the valve body, and the valve body lower part has feed inlet and discharge gate, and the left end of feed inlet and the right-hand member of discharge gate all have sealed face, and dynamic seal cooperation is equipped with the valve plate that can reciprocate and can not rotate between two sealed faces. Meanwhile, the upper part of the valve plate is connected with a valve rod, and the upper part of the valve rod is connected with a handle through a screw nut mechanism. After the handle rotates, the valve rod is driven to move up and down through the screw nut mechanism, then the valve plate moves up and down to form sealing or opening for the two sealing inclined planes, and finally, the feed inlet and the discharge outlet are communicated or cut off.

Currently, with the development of gate valve technology, manufacturers prepare both sealing surfaces as inclined surfaces in order to maintain a better seal. Correspondingly, the valve plate is prepared into a wedge shape with a small end at the lower part, so that the sealing effect of the gate valve is improved to a greater extent; however, in order to ensure the sealing effect, when the gate valve is in a closed state, the sealing surface of the existing gate valve is tightly attached to the valve plate and is kept in an interference fit state; after the valve is opened and closed for a long time, abrasion can occur between the valve plate and the sealing surface due to long-time mutual extrusion friction, so that a gap is formed between the valve plate and the sealing surface, the valve plate and the sealing surface cannot be tightly attached, and the sealing effect is affected; therefore, a gate valve is needed that can enable the valve plate and the sealing surface to be mutually attached after being worn and ensure the sealing effect.

Disclosure of Invention

In order to solve the problems, the utility model provides the gate valve, which can ensure that the valve plate can be tightly attached to the sealing pair after being worn and ensure good sealing effect in the use process.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the gate valve comprises a valve body, wherein a valve cavity is arranged in the valve body, sealing pairs are arranged on two sides of the valve cavity, and a valve plate assembly is arranged in the valve cavity; the sealing device also comprises a driving assembly, wherein when the sealing plates descend, the driving assembly controls the two sealing plates to move towards the sealing pair until the sealing pair is attached to the sealing plates; the mounting plate is also connected with a valve rod in a threaded manner, and the valve rod is rotationally connected with the valve body.

The utility model is further arranged that the driving assembly comprises a control cavity longitudinally arranged in the mounting plate and a sliding rod horizontally arranged between the sealing plate and the mounting plate, one end of the sliding rod is fixedly connected with the sealing plate, and the other end of the sliding rod is arranged in the control cavity and is conical; the control cavity is internally provided with a driving rod in a sliding way, the driving rod is propped against the end parts of the two sliding rods, the end parts of the driving rod are in a conical shape with small upper part and large lower part, and when the driving rod slides upwards, the two sliding rods slide outwards; the sealing plate also comprises conical blocks arranged at the bottom of the valve cavity, wherein the bottoms of the two sealing plates are provided with abutting blocks, and a conical groove matched with the conical blocks is formed between the two abutting blocks; the conical block is also provided with a plug rod which is inserted into the control cavity and props against the bottom of the driving rod.

The utility model is further characterized in that sliding strips are symmetrically arranged on the inner wall of the valve cavity, and sliding grooves matched with the sliding strips are symmetrically arranged on the periphery of the mounting plate.

The utility model is further characterized in that a connecting cylinder is arranged in the middle of the mounting plate, and the valve rod is in threaded connection with the connecting cylinder.

The utility model is further provided with two control cavities symmetrically arranged on two sides of the connecting cylinder.

The utility model is further provided with a return spring arranged between the pair of sealing plates and the mounting plate.

In summary, the utility model has the following beneficial effects:

compared with the prior art, the sealing plate is horizontally arranged on two sides of the mounting plate in a sliding manner, and the driving assembly is arranged in the valve cavity and used for controlling the sealing plate to move towards the sealing pair, so that a user can control the mounting plate to lift through the valve rod, the sealing plate can be far away from the sealing pair in the process of opening and closing the valve, friction between the sealing plate and the sealing pair in the process of opening and closing the valve is reduced, abrasion of the valve plate in the process of using the valve plate is reduced, and the service life of the valve plate is prolonged;

meanwhile, the sealing plate can slide to the sealing pair through the driving assembly, so that gaps between the sealing plate and the sealing pair due to abrasion can be compensated, and a good sealing effect in the use process of the gate valve is ensured.

Drawings

Fig. 1 is a perspective view of the present embodiment.

Fig. 2 is a sectional structural view of the present embodiment.

Fig. 3 is a partial enlarged view at fig. 2A.

Fig. 4 is a perspective view of the valve body of the present embodiment.

Fig. 5 is a sectional view of the valve body of the present embodiment.

Fig. 6 is a perspective view of the valve plate assembly of the present embodiment.

Fig. 7 is a cross-sectional view of the valve plate assembly of the present embodiment.

Reference numerals: 1-a valve body; 2-valve cavity; 3-sealing pairs; a 4-valve plate assembly; 41-mounting plates; 42-sealing plate; 43-valve stem; a 5-drive assembly; 51-control chamber; 52-a sliding rod; 53-drive rod; 54-conical blocks; 55-abutting blocks; 56-a conical groove; 57-insert rod; 6-sliding strips; 7-a chute; 8-connecting cylinder; 9-return spring.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-7, the embodiment discloses a gate valve, which comprises a valve body 1, wherein a water inlet and a water outlet are arranged on the valve body 1, a valve cavity 2 which is communicated with the water inlet and the water outlet is also arranged in the valve body 1, sealing pairs 3 are arranged at two side edges of the valve cavity 2, a valve plate assembly 4 is also arranged in the valve cavity 2, and the valve plate assembly 4 can be controlled to lift in the valve cavity by rotating a valve rod, so that the opening and closing of the valve are realized;

in order to better ensure the sealing effect, the sealing pair 3 is arranged as an inclined plane, and the valve plate is correspondingly arranged as a wedge shape with a big upper part and a small lower part, so that when the valve plate descends, the sealing surface of the valve plate can be in interference fit with the sealing pair, and good sealing performance of the valve plate is ensured; however, because the gate valve needs to be opened and closed for many times in the use process, when the valve plate descends each time, the sealing surface of the valve plate and the sealing pair are mutually extruded, so that the sealing pair or the valve plate is deformed, and a gap is formed at the joint of the sealing pair and the valve plate, thereby influencing the sealing effect.

As shown in fig. 2-3, the valve plate assembly 4 provided by the utility model comprises a mounting plate 41 in threaded connection with a valve rod 43, the mounting plate 41 and the valve cavity 2 are arranged in a sliding manner, sealing plates 42 are horizontally arranged on two sides of the mounting plate 41 in a sliding manner, and the sealing plates 42 can be attached to the surface of the sealing pair 3, so that the valve is closed; the sealing plate 42 that the horizontal slip set up descends the back at mounting panel 41, through the drive of drive assembly 5, can keep away from mounting panel 41 to the direction removal of sealed pair 3 to can compensate the clearance that sealed pair 3 or sealing plate 42 produced between the two after wearing and tearing, avoided the gap to lead to leaking, guaranteed the sealed effect in the use.

As shown in fig. 3, the sealing plate 42 is slidably disposed on two side surfaces of the mounting plate 41 through a sliding rod 52, a control cavity 51 is disposed in the mounting plate 41, one end of the sliding rod 52 is tapered and exposed in the control cavity 51, a driving rod 53 is further slidably disposed in the control cavity 51 up and down, a tapered head matched with the sliding rod 52 is disposed at the end of the driving rod 53, and when the driving rod 52 ascends, the sealing plate 42 is driven by the sliding rods 52 on two sides to be away from the mounting plate 41, so that sealing pair lamination with two sides of the valve cavity is realized.

When the user controls the mounting plate 41 to descend through the valve rod 43, after the mounting plate 41 descends to the bottom and the abutting block 55 at the bottom of the sealing plate 42 abuts against the conical block 54 at the bottom of the valve cavity 2, the user continues to rotate the valve rod 43, so that the mounting plate continues to drive the sealing plate 42 to descend; at this time, the tapered block 54 is inserted into the tapered groove 56 between the two abutting blocks 55, and the sealing plate 42 is pushed to move to both sides by the tapered block 54; meanwhile, the insert rod 57 on the conical block 54 is inserted into the control cavity 51 and pushes the driving rod 53 to move upwards, so that the sliding rod 52 is controlled to push the sealing plate 42 to two sides; the sliding rod 52 is used for controlling the upper section of the sealing plate, and the abutting block 55 is used for controlling the lower section of the sealing plate, so that the upper section and the lower section of the sealing plate can move simultaneously, and the stability during movement is ensured. When the sealing plate 42 is tightly attached to the sealing pair 3, the sealing plate cannot be moved, and at this time, the valve rod cannot be rotated by the user.

Through the structure, when the sealing pair or the sealing plate is worn to cause a gap between the sealing pair and the sealing plate, a user downwards moves the mounting plate to control the sealing plate to move to two sides, so that the gap between the sealing pair and the sealing plate is made up, and the sealing effect of the gate valve is ensured after closing.

As shown in fig. 3, a return spring is arranged between the sealing plate and the mounting plate, and the sealing plate can be controlled to be attached to the mounting plate in the rising process through the return spring, so that friction between the sealing plate and the sealing pair is reduced, and the service life of the sealing plate or the sealing pair is prolonged.

As shown in fig. 4-6, sliding grooves are formed in two side edges of the mounting plate, sliding strips are arranged on two sides of the valve cavity 3, and stability of vertical sliding of the mounting plate can be guaranteed through the sliding grooves and the sliding strips.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the present utility model, and any modifications, equivalent substitutions, improvements, etc. within the design concept of the present utility model should be included in the scope of the present utility model.

Claims

1. The gate valve comprises a valve body (1), wherein a valve cavity (2) is arranged in the valve body (1), sealing pairs (3) are arranged on two sides of the valve cavity (2), and a valve plate assembly (4) is arranged in the valve cavity (2), and the gate valve is characterized in that the valve plate assembly (4) comprises a mounting plate (41) which is arranged in the valve cavity (2) in a sliding manner up and down, sealing plates (42) are arranged on two sides of the mounting plate (41) in a sliding manner, and the two sealing plates (42) move in opposite directions and can be tightly attached to the sealing pairs (3); the sealing device further comprises a driving assembly (5), when the sealing plates (42) are lowered, the driving assembly (5) controls the two sealing plates (42) to move towards the sealing pair (3) until the sealing pair (3) is attached to the sealing plates (42); the mounting plate (41) is further connected with a valve rod (43) in a threaded mode, and the valve rod (43) is rotationally connected with the valve body (1).

2. A gate valve according to claim 1, characterized in that the driving assembly (5) comprises a control chamber (51) longitudinally arranged in the mounting plate (41) and a sliding rod (52) horizontally arranged between the sealing plate (42) and the mounting plate (41), one end of the sliding rod (52) is fixedly connected with the sealing plate (42), and the other end is arranged in the control chamber (51) and is conical; a driving rod (53) is arranged in the control cavity (51) in a sliding manner, the driving rod (53) is propped against the end parts of the two sliding rods (52), the end parts of the driving rod (53) are in a conical shape with small upper part and large lower part, and when the driving rod (53) slides upwards, the two sliding rods (52) slide outwards; the sealing device further comprises conical blocks (54) arranged at the bottom of the valve cavity (2), abutting blocks (55) are arranged at the bottoms of the two sealing plates (42), and conical grooves (56) matched with the conical blocks (54) are formed between the two abutting blocks (55); the conical block (54) is also provided with a plug rod (57) which is inserted into the control cavity (51) and props against the bottom of the driving rod (53).

3. A gate valve according to claim 2, characterized in that the inner wall of the valve chamber (2) is symmetrically provided with sliding strips (6), and the periphery of the mounting plate (41) is symmetrically provided with sliding grooves (7) matched with the sliding strips (6).

4. A gate valve according to claim 2, characterized in that the mounting plate (41) is provided with a connecting cylinder (8) in the middle, and the valve rod (43) is screwed with the connecting cylinder (8).

5. A gate valve according to claim 2, characterized in that the control chambers (51) are arranged in two symmetrical pairs on both sides of the connecting cylinder (8).

6. A gate valve according to claim 1, characterized in that a return spring (9) is provided between a pair of said sealing plates (42) and the mounting plate (41).