CN220600490U - Soft sealing gate valve - Google Patents

Abstract

The utility model relates to the technical field of gate valves, in particular to a soft sealing gate valve, which comprises a base, a valve core and a rotating handle, wherein the valve core is in threaded connection with the base, the valve core comprises a valve shell, a valve rod, an inner threaded pipe in threaded connection with the valve rod, a flange head in threaded connection with the other end of the inner threaded pipe, a rubber sealing head is injection molded at the other end of the flange head, a conical cavity is arranged at the other end of the rubber sealing head, the sealing effect and strength can be further enhanced, the problems that a rigid sealing structure is easy to wear and loose in sealing and easy to leak in the long-term use process in the prior art are solved, and the soft sealing gate valve has the advantages of abrasion resistance, good sealing performance, long service life and convenience in rubber sealing head replacement.

Description

Soft sealing gate valve

Technical Field

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

Background

The gate valve is a shutter, the moving direction of the shutter is vertical to the fluid direction, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled.

Gate valve seals through base and flashboard contact, and current gate valve often is the sheetmetal wholly, adopts rigid seal between metal flashboard and the base, and rigid seal structure is wearing and tearing easily in long-term use, and sealed not tight, the condition of leaking appears easily, and change the flashboard inconvenient, and rigid seal's gate valve is in order to avoid leaking, and the aperture of base is little, causes even under the condition that the gate valve was fully opened, and the flow is through little, can't satisfy the production demand.

Disclosure of Invention

The utility model aims to provide a soft sealing gate valve which adopts a soft sealing structure of a rubber sealing head, has the advantages of wear resistance, good sealing property, long service life and convenience in replacing the rubber sealing head.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows: the utility model provides a soft sealing gate valve, includes the base, with base threaded connection's case and twist grip, the case include valve casing, valve rod, with valve rod threaded connection's internal thread pipe, with the detachable threaded connection's of the other end flange head of internal thread pipe, the flange head other end has moulded plastics the rubber seal head, the rubber seal head other end is provided with the circular cavity, the valve rod top with twist grip swing joint, the valve rod middle part still is provided with a plurality of annular grooves and cover and is equipped with a plurality of sealing washer and packing ring, the inside offered of base with circular recess that can closely combine is used in the cooperation of circular cavity, circular recess degree of depth is not more than 3 millimeters.

Further preferably, a nut for fixing the rotary handle is further arranged at the top of the valve rod, and a sealing cover is clamped at the center of the rotary handle.

Further preferably, a spring washer is arranged at the bottom of the rotary handle to prevent the nut from loosening, and the valve rod penetrates through the spring washer and the rotary handle to be in threaded connection with the nut.

Further preferably, the taper of the rubber sealing head is 11-15 degrees.

Further preferably, the threaded connection part of the valve casing and the base is embedded and sleeved with a large sealing ring.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, by reducing the depth of the circular recess in the base, when the gate valve is opened, flowing medium can wash away tiny particles left in the circular recess, the problem of easy blockage in the circular recess is solved, when the gate valve is closed, the conical cavity at the top end of the rubber sealing head is matched with the circular recess in the base for use, the sealing effect is better, the stability of the rubber sealing head is greatly improved, the rubber material has high wear resistance, the service life is prolonged, and when the rubber sealing head is damaged, the detachable screw thread can be used for replacing a new rubber sealing head.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the base, valve core, rotary handle of the embodiment of the utility model;

FIG. 3 is an exploded view of an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a base of an embodiment of the present utility model with a gate valve open;

FIG. 5 is a cross-sectional view of a base of an embodiment of the present utility model with a gate valve closed;

fig. 6 is a cross-sectional view of a rubber sealing head of an embodiment of the present utility model.

Reference numerals

1. A base; 11. a circular recess; 2. a valve core; 21. a valve housing; 22. a valve stem; 221. an annular groove; 222. a seal ring; 223. a gasket; 23. an internally threaded tube; 24. a flange head; 25. a rubber sealing head; 251. a conical cavity; 3. rotating the handle; 4. a screw cap; 5. sealing cover; 6. a spring washer; 7. and a large sealing ring.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

as shown in fig. 1 to 6, a soft sealing gate valve comprises a base 1, a valve core 2 and a rotary handle 3, wherein the valve core 2 is in threaded connection with the base 1, the valve core 2 comprises a valve shell 21, a valve rod 22, an inner threaded pipe 23 in threaded connection with the valve rod 22, a flange head 24 in detachable threaded connection with the other end of the inner threaded pipe 23, a rubber sealing head 25 is injection-molded at the other end of the flange head 24, a conical cavity 251 is arranged at the other end of the rubber sealing head 25, the top of the valve rod 22 is movably connected with the rotary handle 3, a plurality of annular grooves 221 are further arranged in the middle of the valve rod 22, a plurality of sealing rings 222 and gaskets 223 are sleeved, a circular recess 11 which is matched with the conical cavity 251 for use and can be tightly combined is formed in the base 1, and the depth of the circular recess 11 is not more than 3 mm.

Adopt above-mentioned technical scheme, through setting up the cooperation use of base 1, case 2 and twist grip 3, can block and open the medium of pipeline, set up circular recess 11 at rubber seal head 25, the circular recess 11 of seting up inside cooperation base 1, when the gate valve is closed, both closely cooperate, can effectively improve sealed effect, adopt the rubber material to have high wearability, increased life, circular recess 11 degree of depth is not more than 3 millimeters, can effectively reduce the residual of impurity in the medium, avoid remaining impurity to block up circular recess 11, influence sealed effect, flange head 24 detachable threaded connection, the maintenance rubber seal head 25 is conveniently changed.

Referring to fig. 3, a nut 4 for fixing the rotary handle 3 is further provided on the top of the valve rod 22, and a sealing cover 5 is clamped at the center of the rotary handle 3.

By adopting the technical scheme, the connection between the rotary handle 3 and the valve rod 22 can be reinforced through the screw cap 4 and the sealing cover 5, and the valve rod 22 is driven to rotate through the rotation of the rotary handle 3.

Referring to fig. 2 and 3, the bottom of the rotary handle 3 is provided with a spring washer 6 to prevent the nut 4 from loosening, and a valve stem 22 passes through the spring washer 6 and the rotary handle 3 and is screw-coupled with the nut 4.

By adopting the technical scheme, the nut 4 can be prevented from loosening by arranging the spring washer 6, and the fixed connection between the nut 4 and the rotary handle 3 is further enhanced.

Referring to fig. 1, 2, 4, 5, and 6, the taper of the rubber sealing head 25 is 11-15 degrees.

By adopting the technical scheme, the taper of the rubber sealing head 25 is 11-15 degrees, so that the sealing effect between the rubber sealing head 25 and the base 1 can be further enhanced.

Referring to fig. 2 and 3, the threaded connection between the valve housing 2 and the base 1 is designed as an embedded type and is sleeved with a large sealing ring 7.

By adopting the technical scheme, the sealing effect between the valve casing 2 and the base 1 can be further enhanced by arranging the large sealing ring 7, and the embedded design can prevent cracking, falling and excessive screwing.

Principle of operation

When the gate valve is opened, the rotary hand wheel 3 is screwed to drive the rubber sealing head 25 to move upwards, so that the rubber sealing head 25 leaves the circular recess 11, and a medium fluid channel in the base 1 is communicated; when the gate valve is closed, the hand wheel 3 is screwed and rotated to drive the rubber sealing head 25 to move downwards, so that the rubber sealing head 25 is tightly combined with the circular recess 11 to block a medium fluid channel in the base 1, and the rubber sealing head 25 is used as a gate plate, thereby being convenient to replace and maintain.

To sum up, through setting up the cooperation use of base 1, case 2 and twist grip 3, can block and open the medium of pipeline, set up circular cavity 251 at rubber seal head 25, circular recess 11 of seting up inside cooperation base 1, both closely cooperate, can effectively improve sealed effect, adopt the rubber material to have high wearability, increased life, circular recess 11 degree of depth is not more than 3 millimeters, can effectively reduce the residual of impurity in the medium, avoid remaining impurity to block circular recess 11, influence sealed effect, through setting up the tapering of rubber seal head 25 and be 11-15 degrees, big sealing washer 7, further strengthen sealed effect.

Although embodiments of the present utility model 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 therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A soft seal gate valve, characterized in that: the valve comprises a base (1), a valve core (2) and a rotary handle (3), wherein the valve core (2) is in threaded connection with the base (1), the valve core (2) comprises a valve shell (21), a valve rod (22), an inner threaded pipe (23) in threaded connection with the valve rod (22) and a flange head (24) in detachable threaded connection with the other end of the inner threaded pipe (23), a rubber sealing head (25) is injection molded at the other end of the flange head (24), and a conical cavity (251) is formed at the other end of the rubber sealing head (25); the top of the valve rod (22) is movably connected with the rotary handle (3), and a plurality of annular grooves (221) are further formed in the middle of the valve rod (22) and sleeved with a plurality of sealing rings (222) and gaskets (224); the base (1) is internally provided with a circular recess (11) which is matched with the rubber sealing head (25) for use and can be tightly combined, and the depth of the circular recess (11) is not more than 3 mm.

2. A soft seal gate valve according to claim 1, wherein: the top of the valve rod (22) is also provided with a nut (4) for fixing the rotary handle (3), and the central position of the rotary handle (3) is clamped with a sealing cover (5).

3. A soft seal gate valve according to claim 2, wherein: the bottom of the rotary handle (3) is provided with a spring washer (6) for preventing the screw cap (4) from loosening, and the valve rod (22) passes through the spring washer (6) and the rotary handle (3) to be in threaded connection with the screw cap (4).

4. A soft seal gate valve according to claim 1, wherein: the taper of the rubber sealing head (25) is 11-15 degrees.

5. A soft seal gate valve according to claim 1, wherein: the valve casing (21) and the base (1) are in an embedded design at the threaded connection position and are sleeved with a large sealing ring (7).