CN217081483U

CN217081483U - Gate valve

Info

Publication number: CN217081483U
Application number: CN202220680102.2U
Authority: CN
Inventors: 徐海涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-07-29
Anticipated expiration: 2032-03-25

Abstract

The utility model provides a gate valve relates to valve technical field, has solved the flashboard both sides and has had fluid pressure difference, and the easy wearing and tearing of one side sealing face are serious, lead to the technical problem that the gate valve appears leaking. The gate valve comprises a valve body, a valve rod and a gate plate, wherein the gate plate is connected to one end of the valve rod and used for plugging or opening a fluid passage in the valve body; when the gate valve is opened, the transposition piece can only move in the vertical direction along the limiting part so as to limit the valve rod to move in the vertical direction, when the gate plate rises into the cylinder body and the transposition piece rises into the transposition gap, the valve rod can rotate 180 degrees under the action of external force, and then when the gate plate falls to the position for plugging the fluid channel, the exchange between the inlet sealing surface and the outlet sealing surface is realized. The fluid pressure difference at two sides of the flashboard is prevented from only wearing the sealing surface at one side of the flashboard, and the leakage of the gate valve is prevented.

Description

Gate valve

Technical Field

The utility model belongs to the technical field of the valve technique and specifically relates to a gate valve is related to.

Background

A prior art gate valve includes a valve body in which fluid flows along a fluid passage, and a gate plate that seals or opens the fluid passage in the valve body. The face of the gate that seals against the valve body includes an inlet sealing face and an outlet sealing face, wherein the face of the gate that faces the fluid inlet side is referred to as the inlet sealing face and the face of the gate that faces the fluid outlet side is referred to as the outlet sealing face.

The applicant has found that the prior art has at least the following technical problems: in the process of opening and closing the flashboard, because the pressure on the inlet side of the flashboard is higher than that on the outlet side of the flashboard, the outlet sealing surface is often abraded or scratched under the action of the difference of fluid pressure. And the leaked gate valve can not be repaired in a working state and can only be overhauled in a shutdown way, if the gate valve is used in a barely worn process, the part which is abraded or scratched by pressure fluid is possibly expanded, and a damaged sealing surface causes larger leakage, so that the maintenance interval of the gate valve is small, and the economic loss of equipment shutdown is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gate valve to solve exist among the prior art because there is fluid pressure difference in the flashboard both sides, the easy wearing and tearing of the sealed face of export are serious, lead to the gate valve technical problem that the leakage appears. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

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

the utility model provides a pair of gate valve, including valve body, valve rod and connect in valve rod one end is used for the shutoff or opens fluid passage's in the valve body flashboard, wherein:

the valve rod sequentially penetrates through the support and the cylinder body which are connected with the valve body, the valve rod is connected with a transposition piece, a limiting part is arranged in the support, and a transposition gap is formed between the limiting part and the top of the inner cavity of the support;

when the gate valve is opened, the shifting piece can only move in the vertical direction along the limiting part so as to limit the valve rod to move in the vertical direction, and when the gate plate rises into the cylinder and the shifting piece rises into the shifting gap, the valve rod can rotate 180 degrees under the action of external force, so that when the gate plate descends to the position for plugging the fluid channel, the exchange between the inlet sealing surface and the outlet sealing surface is realized.

Preferably, the transposition member is sleeved outside the valve rod, an open slot is formed in one side or more than two sides of the transposition member, and the open slot extends along the vertical direction;

the limiting part comprises a limiting block, the limiting block is fixed on the inner wall of the cavity of the support and extends along the vertical direction, and the limiting block can stretch into the opening groove correspondingly.

Preferably, the transposing member includes a fixing portion and a fitting portion, wherein:

the fixed part with valve rod fixed connection, the external diameter of cooperation portion is greater than the external diameter of fixed part, the open slot set up in on the cooperation portion, just the fixed part with spacing portion clearance fit.

Preferably, the transposition piece is formed by connecting a first splicing part and a second splicing part which are symmetrically arranged, after the first splicing part and the second splicing part are connected in place, the middle parts of the first splicing part and the second splicing part are surrounded with a polygonal through hole for the valve rod to penetrate through, and the open grooves are spliced at two sides, and the openings of the open grooves are arranged in a back-to-back mode.

Preferably, the gate valve further comprises a hand wheel and a nut portion, wherein:

the hand wheel with nut portion fixed connection, nut portion with the upper end fixed connection of support, nut portion with valve rod threaded connection, forward rotation during the hand wheel, the valve rod rises along vertical direction, and during the antiport the hand wheel, the valve rod descends along vertical direction.

Preferably, be provided with on the valve body and be used for supplying the opening that the flashboard stretched into, the opening of valve body with still be provided with spacing subassembly on the cooperation position on the flashboard, spacing subassembly is used for the restriction the circumferential direction of valve rod.

Preferably, the limiting assembly comprises a guide block and a guide groove, one of the guide block and the guide groove is arranged on the inner wall of the opening of the valve body, the other of the guide block and the guide groove is arranged on the outer wall of the flashboard, and the guide block extends into the guide groove and corresponds to the guide groove and is used for limiting circumferential rotation of the valve rod.

Preferably, the barrel is formed by connecting more than two barrel-shaped structures, the upper end of the barrel is sealed through a barrel cover, adjacent barrels are locked through a bolt assembly, and a sealing gasket is clamped and fixed between the adjacent barrels.

Preferably, the inlet sealing surface and the outlet sealing surface are both wedge-shaped surfaces that are disposed obliquely relative to the fluid passage.

Preferably, the cylinder cover is provided with a pressing sleeve, the end part of the bracket is provided with a pressing plate, at least part of the pressing plate extends into the pressing sleeve, the pressing plate and the pressing sleeve are fixed in a sealing manner, and lubricating filler is filled between the pressing plate and the pressing sleeve.

The utility model provides a gate valve compares with prior art, has following beneficial effect: when opening the gate valve, the transposition piece only can move along spacing portion in vertical direction to the restriction valve rod is moving along vertical direction, and then can make the flashboard open the fluid passage of valve body, the valve rod continues to rise, rise to the barrel in the flashboard, and when transposition piece rises to transposition clearance in, rotate 180 with the valve rod, close the flashboard, when the flashboard descends to the position of blocking fluid passage again, original entry sealed face becomes the sealed face of export, original sealed face of export becomes the sealed face of entry, can prevent that the sealed face of one side of flashboard is only worn and torn to the fluid pressure differential in flashboard both sides, prevent that the sealed face of export of flashboard from receiving the erosion damage of fluid for a long time and leading to the wearing and tearing position more serious, thereby prevent the gate valve leakage to a certain extent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic sectional view of a gate valve;

FIG. 2 is a partial schematic view of the gate;

FIG. 3 is a side view of the index member;

FIG. 4 is a schematic top view of the index member;

FIG. 5 is a schematic top view of the valve body;

fig. 6 is a schematic top view of the shutter.

FIG. 1, valve body; 100. a fluid channel; 101. a guide block; 102. an opening; 2. a shutter plate; 201. an inlet sealing surface; 202. an outlet sealing surface; 203. a guide groove; 3. a valve stem; 4. sealing gaskets; 5. a bolt assembly; 6. a barrel; 7. a cylinder cover; 8. a cotter pin; 9. a nut; 10. a support; 11. a nut portion; 12. a bearing gland; 13. a hand wheel; 14. locking the nut; 15. a flat bond; 16. pressing a plate; 17. pressing the sleeve; 18. a filler; 19. a transposition piece; 191. a fitting portion; 192. a fixed part; 193. an open slot; 194. perforating at multiple corners; 195. bolt holes; 196. a first splice; 197. a second splice; 20. a limiting block; 21. a transposition gap.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The embodiment of the utility model provides a gate valve can prevent that the sealed face of export of flashboard 2 from receiving fluidic the damage of erodeing for a long time and leading to the wearing and tearing position more serious to prevent to a certain extent that the gate valve from leaking.

The technical solution provided by the present invention is explained in more detail with reference to fig. 1 to 6.

As shown in fig. 1 to 6, the present embodiment provides a gate valve, which includes a valve body 1, a valve stem 3, and a gate plate 2 connected to one end of the valve stem 3 and used for blocking or opening a fluid passage 100 in the valve body 1, wherein: the valve body 1 is connected with a cylinder body 6, the cylinder body 6 is connected with a support 10, cavities are arranged in the support 10 and the cylinder body 6, a valve rod 3 sequentially penetrates through the support 10 and the cylinder body 6 which are connected with the valve body 1, a transposition piece 19 is connected to the valve rod 3, a limiting part (limiting block 20) is arranged in the support 10, and a transposition gap 21 is formed between the limiting part (limiting block 20) and the top of an inner cavity of the support 10; when the gate valve is opened, the transposition member 19 can only move in the vertical direction along the limiting portion (limiting block 20) to limit the valve rod 3 to move in the vertical direction, when the gate plate 2 rises into the cylinder 6 and the transposition member 19 rises into the transposition gap 21, the transposition member 19 and the limiting portion (limiting block 20) are separated from each other, the valve rod 3 can rotate 180 degrees under the external force, when the gate valve is continuously closed, the transposition member 19 can only move in the vertical direction along the limiting portion (limiting block 20), the gate plate 2 descends in the vertical direction, and therefore when the gate plate 2 descends to the position where the fluid channel 100 is blocked, the exchange between the inlet sealing surface 201 and the outlet sealing surface 202 is achieved.

As shown in fig. 1, the fluid flows from left to right in the fluid passage, and a surface of the shutter 2 facing the fluid inlet side is referred to as an inlet seal surface 201 (left side in fig. 1), and a surface of the shutter facing the fluid outlet side is referred to as an outlet seal surface 202 (right side in fig. 1).

When the transposition member 19 is matched with the limiting part (limiting block 20), the transposition member and the limiting part play a role in limiting the movement direction of the valve rod 3, so that the valve rod 3 can only move in the vertical direction.

Wherein, the function of this transposition clearance is: the valve rod 3 vertically moves upwards, when the transposition member 19 moves into the transposition gap 21, the transposition member can be separated from the limiting part (limiting block 20), after the blocking effect of the limiting part (limiting block 20) is lost, the valve rod 3 is rotated, the valve rod 3 rotates 180 degrees on the horizontal plane, then the gate valve is closed, when the gate plate 2 descends to the position of blocking the fluid channel 100 again, the original inlet sealing surface 201 can be changed into the outlet sealing surface 202, and the original outlet sealing surface 202 is changed into the inlet sealing surface 201.

In the gate valve of the present embodiment, when the gate valve is opened, the index member 19 can move only in the vertical direction along the stopper portion, thereby restricting the valve stem 3 from moving in the vertical direction, thereby enabling the shutter 2 to open the fluid passage 100 of the valve body 1, the valve rod 3 to continue to rise, when the shutter 2 is raised into the cylinder 6 and the index member 19 is raised into the index gap 21, the valve rod 3 is rotated by 180 °, the shutter 2 is closed, thus, when the gate plate 2 descends to the position for blocking the fluid channel 100 again, the original inlet sealing surface 201 is changed into the outlet sealing surface 202, the original outlet sealing surface 202 is changed into the inlet sealing surface 201, the fluid pressure difference between the two sides of the gate plate 2 can be prevented from only wearing the outlet sealing surface 202 of the gate plate 2, the outlet sealing surface 202 of the gate plate 2 is prevented from being damaged by the fluid scouring for a long time, the worn part is prevented from being serious, and the leakage of the gate valve is prevented to a certain degree.

As an alternative embodiment, referring to fig. 1-4, the shifting member 19 of the present embodiment is sleeved outside the valve rod 3, and with reference to fig. 2 and 4, an open slot 193 is disposed at one side or more than two sides of the shifting member 19, and the open slot 193 extends in a vertical direction; referring to fig. 4, the limiting part includes a limiting block 20, the limiting block 20 is fixed on the inner wall of the cavity of the bracket 10 and extends along the vertical direction, and the limiting block 20 can extend into the corresponding opening groove 193.

Because the limiting block 20 is fixed in the cavity of the bracket 10 and is vertically arranged, the open slot 193 of the transposition member 19 extends in the vertical direction, and when the two are mutually matched, the guiding function is achieved, so that the valve rod 3 can only move in the vertical direction and cannot rotate in the circumferential direction.

As an alternative implementation, as shown in fig. 2, 3 and 4, the transposing member 19 of the present embodiment includes a fixing portion 192 and a fitting portion 191, wherein: the fixing portion 192 is fixedly connected with the valve stem 3, the outer diameter of the matching portion 191 is larger than that of the fixing portion 192, the opening groove 193 is formed in the matching portion 191, and the fixing portion 192 is in clearance fit with the limiting portion (limiting block 20).

The opening groove 193 on the matching part 191 is used for being connected with the limiting block 20 in a sliding mode, and the outer diameter of the matching part 191 is larger than that of the fixing part 192, so that when the matching part 191 of the transposition piece 19 moves into the transposition gap 21, the valve rod 3 can rotate 180 degrees on the horizontal plane, and the structure is more compact.

As an alternative embodiment, referring to fig. 3 and 4, the transposing element 19 in this embodiment is formed by connecting a first splicing part 196 and a second splicing part 197 that are symmetrically arranged, after the first splicing part 196 and the second splicing part 197 are connected in place, a polygonal through hole 194 for the valve rod 3 to pass through is defined in the middle of the first splicing part 196 and the second splicing part 197, open slots 193 are spliced at both sides, and the openings of the two open slots 193 are arranged in a back-to-back manner.

The first splicing portion 196 and the second splicing portion 197 are provided with bolt holes 195 communicated with each other, so that locking members such as bolts can penetrate through the corresponding bolt holes 195 to connect the first splicing portion 196 and the second splicing portion 197 to each other, and disassembly and assembly are facilitated. The polygonal through hole 194 in the middle of the transposition member 19 can be in interference fit with the valve rod 3, so that when the valve rod 3 rotates, the transposition member 19 can also synchronously rotate 180 degrees along with the valve rod 3, and relative displacement between the transposition member 19 and the valve rod 3 in the circumferential direction is prevented.

In the present embodiment, a specific implementation manner of the valve rod 3 moving in the vertical direction is provided, and referring to fig. 1, the gate valve further includes a hand wheel 13 and a nut portion 11, where: the hand wheel 13 is fixedly connected with the nut part 11, specifically, the hand wheel 13 is tightly matched with the nut part 11 through a flat key 15, the upper end of the hand wheel 13 is fixed through a locking nut 14, and a bearing gland 12 is arranged between the nut part 11 and the bracket 10; the nut portion 11 is fixedly connected with the upper end of the support 10, the nut portion 11 is in threaded connection with the valve rod 3, when the hand wheel 13 is rotated in the forward direction, the valve rod 3 rises in the vertical direction, and when the hand wheel 13 is rotated in the reverse direction, the valve rod 3 falls in the vertical direction.

Because the nut part 11 is fixedly connected with the hand wheel 13, when the hand wheel 13 is rotated, the nut part 11 rotates synchronously with the hand wheel 13, and because the transposition piece 19 on the valve rod 3 is matched with the limiting part (the limiting block 20) on the support 10, the rotation of the valve rod 3 in the circumferential direction is limited, so that the valve rod 3 can only move in the vertical direction. Accordingly, the rotation direction of the handwheel 13 can be changed, the valve rod 3 can be moved vertically upward to open the fluid passage 100 of the valve body 1, and the valve rod 3 can be moved vertically downward to close the fluid passage 100 of the valve body 1.

According to the gate valve of the embodiment, the shifting piece 19 is matched with the limiting part (the limiting block 20) on the support 10 to limit the rotation of the valve rod 3 in the circumferential direction, and in addition, as shown in fig. 1, 5 and 6, the valve body 1 is provided with an opening 102 for the gate plate 2 to extend into, and the opening 102 of the valve body 1 and the matching position on the gate plate 2 are also provided with a limiting assembly for limiting the circumferential rotation of the valve rod 3. Wherein, the above-mentioned spacing subassembly mainly restricts the circumferential direction of valve rod 3 through the circumferential direction rotation of flashboard 2.

As an alternative embodiment, referring to fig. 5 and 6, the limiting assembly comprises a guide block 101 and a guide groove 203, one of the guide block 101 and the guide groove 203 is disposed on the inner wall of the opening 102 of the valve body 1, the other is disposed on the outer wall of the gate plate 2, and the guide block 101 extends into the corresponding guide groove 203 for limiting the circumferential rotation of the valve rod 3. Referring to fig. 5 and 6, in the present embodiment, the guide block 101 is disposed on the inner wall of the opening 102, the guide groove 203 is disposed on the outer wall of the gate plate 2, and the gate plate 2 is restricted from rotating in the circumferential direction when the hand wheel 13 is rotated, so as to ensure that the valve rod 3 can only move in the vertical direction.

As an alternative embodiment, referring to fig. 1, the cylinder 6 is formed by connecting more than two cylindrical structures, the end of the cylinder 6 is covered and sealed by a cylinder cover 7, adjacent cylinders 6 are locked by a bolt assembly 5, and a sealing gasket 4 is clamped and fixed between adjacent cylinders 6, so that the sealing performance of the structure is ensured. The above structure can extend the vertical length of the cylinder 6, and when the engagement portion 191 of the index member 19 moves into the index gap 21, the shutter 2 can stay in the cylinder 6.

In an alternative embodiment, referring to FIG. 1, the inlet and

outlet sealing surfaces

201 and 202 are each wedge surfaces that are disposed at an angle relative to the fluid passageway 100. The inlet sealing surface 201 and the outlet sealing surface 202 of the above structure can ensure the sealing effect of the shutter 2 on the fluid passage 100 in the valve body 1.

As an alternative embodiment, referring to FIG. 1, the bracket 10 is connected with the cylinder cover 7 through a cotter pin 8 and a nut 9, a pressing sleeve 17 is arranged on the cylinder cover, a pressing plate 16 is arranged at the end of the bracket 10, at least part of the pressing plate 16 extends into the pressing sleeve 17 and is fixed in a sealing manner, and a lubricating filler 18 is filled between the pressing plate 16 and the pressing sleeve 17.

The pressing plate 16 is matched with the pressing sleeve 17, and the lubricating filler 18 filled between the pressing plate and the pressing sleeve can weaken the valve rod 3, so that the valve rod 3 can move smoothly.

The particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A gate valve, comprising a valve body, a valve stem, and a shutter plate connected to one end of the valve stem and used for blocking or opening a fluid passage in the valve body, wherein:

2. The gate valve of claim 1, wherein the shifting member is sleeved outside the valve rod, and an open slot is formed at one side or more than two sides of the shifting member and extends along a vertical direction;

3. The gate valve of claim 2, wherein the index member comprises a fixed portion and an engaging portion, wherein:

4. The gate valve according to claim 2, wherein the position changing member is formed by connecting a first splicing part and a second splicing part which are symmetrically arranged, after the first splicing part and the second splicing part are connected in place, a polygonal through hole for the valve rod to pass through is formed in the middle of the first splicing part and the second splicing part, the open grooves are spliced on two sides, and openings of the two open grooves are arranged in a back direction.

5. The gate valve of claim 1, further comprising a hand wheel and nut portion, wherein:

6. The gate valve according to claim 1 or 2, wherein the valve body is provided with an opening for the gate plate to extend into, and a limiting component is further provided at a matching position of the opening of the valve body and the gate plate, and is used for limiting circumferential rotation of the valve rod.

7. The gate valve of claim 6, wherein the limiting assembly comprises a guide block and a guide groove, one of the guide block and the guide groove is disposed on an inner wall of the opening of the valve body, the other of the guide block and the guide groove is disposed on an outer wall of the gate plate, and the guide block extends into the corresponding guide groove to limit circumferential rotation of the valve stem.

8. The gate valve according to claim 1 or 2, wherein the cylinder is formed by connecting more than two cylinder structures, the upper end of the cylinder is sealed by a cylinder cover, adjacent cylinders are locked by a bolt assembly, and a sealing gasket is clamped and fixed between the adjacent cylinders.

9. A gate valve according to claim 1 or 2, wherein the inlet sealing surface and the outlet sealing surface are each wedge-shaped surfaces arranged obliquely with respect to the fluid passage.

10. The gate valve of claim 8, wherein the cylinder cover is provided with a pressing sleeve, the end of the bracket is provided with a pressing plate, at least part of the pressing plate extends into the pressing sleeve and is fixed in a sealing manner, and a lubricating filler is filled between the pressing plate and the pressing sleeve.