CN210531652U

CN210531652U - Gate valve

Info

Publication number: CN210531652U
Application number: CN201921478533.5U
Authority: CN
Inventors: 陈思良; 彭建清; 陈文恭; 李佳鑫; 张书恩
Original assignee: Huhang Technology Group Co ltd
Current assignee: Huhang Technology Group Co ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-05-15
Anticipated expiration: 2029-09-06

Abstract

The utility model relates to the technical field of valves, especially, relate to a gate valve, it has mainly been solved among the prior art that the gate valve is not suitable for and carries the medium that contains solid particle impurity, causes the poor problem of sealed effect, including valve body, circular valve plate, valve rod, screw-nut mechanism, handle, the lower part of valve body is located and is provided with the seal groove between two sealed faces, follows all be provided with the mounting groove on the horizontal both sides face of seal groove, seal groove upper portion is provided with has elastic seal cover, the horizontal both ends of seal cover are embedded into the mounting groove respectively in, the width size of seal cover is greater than the width size of seal groove, it has a plurality of elastic component to lie in evenly distributed between seal groove bottom surface and the seal cover in the seal groove for when seal cover breaks away from with.

Description

Gate valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a gate valve.

Background

The gate valve is the most important valve at present, and is widely used for the circulation and the stopping of media such as liquid, gas, dust and the like. Generally, 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 the movive seal complex is equipped with the main 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 rod and nut mechanism. After the handle rotates, the valve rod is driven to move up and down through the screw rod nut mechanism, then the valve plate moves up and down to seal or open the two sealing inclined planes, and finally the feed port and the discharge port are communicated or cut off.

In order to improve the sealing performance of the existing gate valve, a groove is usually formed in the valve body and located in the circumferential side of the valve plate in the closed state, and when the valve plate moves downwards to be closed, the circumferential edge of the valve plate is embedded into the groove to achieve a better sealing effect, such as the Chinese patent application number: 201810368586.5, it is only suitable for the circulation of the liquid or gas medium without impurities, if the medium is doped with solid particles, some solid particles will fall into the groove during the circulation, which results in the untight connection between the valve body and the valve plate and the poor sealing effect.

SUMMERY OF THE UTILITY MODEL

Therefore, to foretell problem, the utility model provides a gate valve, it has mainly solved among the prior art gate valve and has not been applicable to the medium that carries to contain solid particle impurity, causes the poor problem of sealed effect.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a gate valve comprises a valve body, a circular valve plate, a valve rod, a screw rod nut mechanism and a handle, wherein the valve body is provided with a water inlet end, a water outlet end and a flow passage communicated with the water inlet end and the water outlet end, sealing surfaces are arranged at the left end of the water inlet end and the right end of the water outlet end at the upper part of the valve body, the circular valve plate is arranged between the two sealing surfaces and is in dynamic sealing connection with the sealing surfaces in a vertically sliding manner, a sealing groove is arranged between the two sealing surfaces at the lower part of the valve body, mounting grooves are arranged on the two transverse side surfaces along the sealing groove, an elastic sealing sleeve is arranged at the upper part of the sealing groove, the two transverse ends of the sealing sleeve are respectively embedded into the mounting grooves, the width size of the sealing sleeve is larger than that of the sealing groove, a plurality, the seal cover is in a protruding state, the valve rod is arranged on the circular valve plate, and the handle is connected with the valve rod through the screw rod nut mechanism.

Furthermore, a sealing strip is arranged on the outer surface of the circumference surrounding the circular valve plate, and an arc-shaped connecting piece is arranged on the sealing strip and corresponds to the sealing sleeve.

Further, the circular valve plate is provided with a circular groove on the surface of one side of the water inlet end, and the circular groove is surrounded by a convex edge, the circular valve plate is provided with a connecting plate on the same side of the circular groove, the connecting plate is provided with a fan-shaped extending part which is provided with a soft middle part and extends outwards from the middle part, a plurality of reinforcing ribs are uniformly distributed on one surface of the extending part, which is close to the circular valve plate, and the reinforcing ribs are hinged to the convex edge, so that when the circular valve plate is closed, the outer end of the extending part abuts against a sealing surface.

Furthermore, the cross-sectional area of the circular groove is not less than the area of the side face, close to one side of the water inlet end, of the two-thirds circular valve plate.

By adopting the technical scheme, the beneficial effects of the utility model are that: according to the gate valve, the handle is rotated, the screw rod nut mechanism drives the circular valve plate to move up and down, so that the through and the stop of a flow channel are realized, the circular valve plate abuts against the sealing sleeve in the downward movement process, the sealing sleeve is pressed downwards by extruding the elastic piece, the lower peripheral edge of the circular valve plate is embedded into the sealing groove, a good sealing effect is realized, the sealing sleeve forms a convex state when not extruded, the phenomenon that the closing of the circular valve plate is influenced in the process of conveying media with solid particle impurities is avoided, the media with the solid particle impurities can be conveyed well, and the sealing performance is considered; furthermore, the sealing strip and the arc-shaped connecting sheet are arranged, when the circular valve plate is closed, the arc-shaped connecting sheet is abutted against the sealing sleeve, and the sealing strip and the arc-shaped connecting sheet form better contact extrusion, so that the sealing effect is enhanced; furthermore, after the circular valve plate is closed, pressure exists in the conveyed medium to extrude the circular valve plate, the pressure extrusion is realized at the soft middle part by arranging the connecting plate, the pressure extrusion is inwards concave towards the circular groove, the inner end of the extending part is driven to be pressed downwards, the outer end of the extending part is outwards tilted to abut against a sealing surface, and the sealing effect is further improved.

Drawings

FIG. 1 is a schematic cross-sectional structural view of an embodiment of the present invention;

FIG. 2 is a partially enlarged view of the circular valve plate in the unclosed state at A in FIG. 1;

fig. 3 is the structure diagram of the right side view of the valve plate and the connecting plate in the embodiment of the present invention.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

The embodiment of the utility model provides a do:

referring to fig. 1, 2 and 3, a gate valve comprises a valve body 1, a circular valve plate 2, a valve rod 3, a screw-nut mechanism and a handle 4, wherein the valve body 1 has a water inlet end 11, a water outlet end 12 and a flow passage 5 communicated with the water inlet end and the water outlet end, the direction extending along the flow direction of the flow passage 5 is defined as horizontal, the left end of the water inlet end 11 and the right end of the water outlet end 12 on the upper portion of the valve body 1 are both provided with a sealing surface 6, the circular valve plate 2 is arranged between the two sealing surfaces 6 and is in movable sealing connection with the sealing surface 6 in a vertical sliding manner, a sealing groove 7 is arranged between the two sealing surfaces 6 on the lower portion of the valve body 1, mounting grooves 8 are arranged on two lateral side surfaces along the sealing groove 7, the bending radian of the mounting groove 8 is the same as that of the sealing groove 7, an elastic sealing sleeve 9 is arranged on the, the width dimension of the sealing sleeve 9 is greater than the width dimension of the sealing groove 7, a plurality of elastic members 10 are uniformly distributed between the bottom surface of the sealing groove 7 and the sealing sleeve 9 in the sealing groove 7, the elastic members 10 are springs in the embodiment, and are both applicable to elastic rubber blocks or air bags, the number of the elastic members 10 is determined according to the diameter of the gate valve and the elastic potential energy of the elastic members 10, so that when the sealing sleeve 9 is separated from the circular valve plate 2, the sealing sleeve 9 is in a convex state, a sealing strip 20 is arranged around the circumferential outer surface of the circular valve plate 2, an arc-shaped connecting piece 21 is arranged on the sealing strip 20 corresponding to the sealing sleeve 9, the valve rod 3 is arranged on the circular valve plate 2, the handle 4 is connected with the valve rod through a screw nut mechanism, the screw nut mechanism comprises a screw rod 22 rotatably arranged on the free end of the valve rod, the nut 23 is in threaded connection with the screw rod 22, and the handle 4 is arranged at the free end of the screw rod 22.

In this embodiment, a circular groove 24 is disposed on the surface of the circular valve plate 2 on the side of the water inlet end 11, a convex edge 25 is disposed around the circumference of the circular groove 24, the circular valve plate 2 is provided with a connecting plate at the same side of the circular groove 24, the connecting plate comprises a middle part 26 with softness and a fan-shaped extension part 27 extending outwards from the middle part 26 at the position of the circular groove 24, the portions of the middle portion 26 not extended outward by the extension portions 27 are fixed to the circular valve plate 2, reinforcing ribs 28 are uniformly distributed on one surface of the extension part 27 close to the circular valve plate 2, and each reinforcing rib 28 is hinged with the convex edge 25, so that when the circular valve plate 2 is closed, the outer end edge of the extension part 27 is abutted against the sealing surface 6, the cross-sectional area of the circular groove 24 is equal to the area of the side surface of the circular valve plate 2 which is close to one side of the water inlet end 11.

The utility model discloses a working method is: the gate valve drives the circular valve plate 2 to move up and down through the screw rod nut mechanism by rotating the handle 4, so as to realize the communication and the stop of the flow channel 5, the circular valve plate 2 abuts against the sealing sleeve 9 in the downward movement process, the sealing sleeve 9 is pressed down by extruding the elastic part 10, the lower peripheral edge of the circular valve plate 2 is embedded into the sealing groove 7, so as to realize better sealing effect, the sealing sleeve 9 forms a convex state when not extruded, the closing of the circular valve plate 2 is prevented from being influenced in the process of conveying the medium with solid particle impurities, so that the medium with the solid particle impurities can be conveyed well, the sealing performance is good, the sealing strip 20 and the arc-shaped connecting piece 21 are arranged, when the circular valve plate 2 is closed, the arc-shaped connecting piece 21 abuts against the sealing sleeve 9, the sealing sleeve and the sealing sleeve form better contact extrusion, so as to strengthen the sealing effect, after the, there is pressure in the medium of carrying and then extrudees circular valve plate 2, through setting up the connecting plate for pressure extrusion has soft middle part 26, and it is to circular recess 24 indent, thereby drives the inner of extension 27 and pushes down, makes the outer end of extension 27 outwards perk and lean on sealed face 6, further promotes sealed effect.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a gate valve, includes valve body, circular valve plate, valve rod, lead screw nut mechanism, handle, its characterized in that: the valve body is provided with a water inlet end, a water outlet end and a flow passage communicated with the water inlet end and the water outlet end, sealing surfaces are arranged at the left end of the water inlet end and the right end of the water outlet end at the upper part of the valve body, the circular valve plate is arranged between the two sealing surfaces and can be in movable sealing connection with the sealing surfaces in a vertical sliding manner, a sealing groove is arranged between the two sealing surfaces at the lower part of the valve body, mounting grooves are arranged on the two lateral sides of the sealing groove, the upper part of the sealing groove is provided with an elastic sealing sleeve, the two transverse ends of the sealing sleeve are respectively embedded into the mounting grooves, the width dimension of the sealing sleeve is larger than that of the sealing groove, a plurality of elastic pieces are uniformly distributed between the bottom surface of the sealing groove and the sealing sleeve in the sealing groove, so that the sealing sleeve is in a convex state when the sealing sleeve is separated from the circular valve plate, the valve rod is arranged on the circular valve plate, and the handle is connected with the valve rod through the screw rod nut mechanism.

2. The gate valve of claim 1, wherein: the sealing strip is arranged on the outer surface of the circumference of the circular valve plate in a surrounding mode, and the arc-shaped connecting piece is arranged on the sealing strip and corresponds to the sealing sleeve.

3. Gate valve according to claim 1 or 2, characterised in that: the circular valve plate is characterized in that a circular groove is formed in the surface of one side of the water inlet end and surrounds the circular groove, a convex edge is arranged on the periphery of the circular groove, a connecting plate is arranged on the same side of the circular groove on the circular valve plate, the connecting plate is provided with a soft middle part and a fan-shaped extending part which extends outwards from the middle part and comprises a circular groove, a plurality of reinforcing ribs are uniformly distributed on one surface, close to the circular valve plate, of the extending part, and the reinforcing ribs are hinged to the convex edge, so that when the circular valve plate is closed, the outer end of the extending part abuts against.

4. The gate valve of claim 3, wherein: the cross-sectional area of the circular groove is not less than the area of the side face of one side, close to the water inlet end, of the two-thirds circular valve plate.