CN212226040U

CN212226040U - Gate valve

Info

Publication number: CN212226040U
Application number: CN202020844433.6U
Authority: CN
Inventors: 杨忠山
Original assignee: Wenzhou Oujian Valve Co ltd
Current assignee: Wenzhou Oujian Valve Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2020-12-25
Anticipated expiration: 2030-05-19

Abstract

The utility model relates to the field of valves, concretely relates to gate valve, which comprises a valve body, the flashboard, the valve rod, the valve gap, support and hand wheel, the valve gap cover is located on the valve rod and is fixed on the valve body, the lower part of valve body has fluid passage, the upper end fixedly connected with support of valve gap, the upper portion of valve rod is passed the support and is connected with the hand wheel, the lower extreme at the valve rod is connected to the flashboard, and the flashboard is located the lift passageway at fluid passage middle part, the flashboard is the big wedge in the little upper end of lower extreme, the both sides of flashboard all have sealed face, be equipped with hard sealing member on the inner wall of lift passageway, the middle part of hard sealing member is inlayed and is equipped. The utility model discloses a middle soft seal, both sides are sealed sealing method firmly can effectively improve the sealing performance of the sealed face of gate valve, have also increased substantially the security of gate valve operation to can satisfy the in-service use demand better.

Description

Gate valve

Technical Field

The utility model relates to the technical field of valves, concretely relates to gate valve.

Background

The gate valve is a common valve and can be used for controlling the flow of various types of fluid in a pipeline, the gate valve is widely applied to the circulation and stop of media such as liquid, gas, dust and the like, the opening and closing piece of the gate valve is a gate plate, the movement direction of the gate plate is vertical to the fluid direction, and when a valve rod moves up and down, the gate plate is matched with a valve body to close and open the valve.

The sealing performance of the existing gate valve on the market is often deteriorated after long-term use, medium leakage is easy to occur, and great loss is caused to a user. In view of the above-mentioned shortcomings, the present invention provides an improvement.

Disclosure of Invention

In order to overcome the not enough of background art, the utility model provides a gate valve has adopted the sealed mode of middle soft seal, both sides hard seal, can effectively improve the sealing performance of the sealed face of gate valve, has also increased substantially the security of gate valve operation to can satisfy the in-service use demand better.

The utility model adopts the technical proposal that: the utility model provides a gate valve, includes valve body, flashboard, valve rod, valve gap, support and hand wheel, the valve gap cover is located on the valve rod and is fixed on the valve body, the lower part of valve body has fluid passage, the upper end fixedly connected with of valve gap the support, the upper portion of valve rod is passed the support just is connected with the hand wheel, the flashboard is connected the lower extreme of valve rod, just the flashboard is located in the lift passageway at fluid passage middle part, the flashboard is the little big wedge in upper end of lower extreme, the both sides of flashboard all have sealed face, be equipped with hard sealing member on the inner wall of lift passageway, the middle part of hard sealing member inlays and is equipped with soft sealing member, all have on the sealed face of flashboard can contradict in the flashboard sealing block of.

In the above technical scheme, can make the valve rod go up and down when rotating the hand wheel, can drive the flashboard during the valve rod goes up and down in the lift passageway, the flashboard is opened fully when ascending extreme position, the sealed piece of flashboard can extrude hard sealing member and soft sealing member simultaneously when the flashboard descends, because soft sealing member inlays and establishes the middle part at hard sealing member, the hard sealing member of soft sealing member both sides can form hard sealing with the sealed piece of flashboard, soft sealing member can form soft sealing with the sealed piece of flashboard, through adopting middle soft sealing, the sealed performance of face of gate valve can effectively be improved to the sealed mode of both sides hard sealing, the security of gate valve operation has also been increased substantially, thereby can satisfy the in-service use demand better.

In order to facilitate assembly and have better sealing performance, the soft sealing element is a sealing ring, and the middle part of the hard sealing element is provided with a first sealing groove matched with the sealing ring.

Preferably, the hard sealing piece and the flashboard sealing block are made of hard alloy.

In order to facilitate the connection of the valve rod and the flashboard, the lower end of the valve rod is provided with a connector, the upper end of the flashboard is provided with a connecting groove matched with the connector, and the outer side of the connecting groove is provided with a limiting table.

Preferably, the bottom of the lifting channel is provided with a groove, and the lower end of the flashboard is provided with an inwards concave arc-shaped groove.

Preferably, a packing is arranged between the middle part of the valve rod and the valve cover, the upper end of the valve cover is connected with a packing gland through an eyelet bolt, and the packing gland abuts against the upper end of the packing.

In order to possess better sealing performance, the valve gap passes through threaded connection to be fixed the upper end of valve body be equipped with gasket and sealed pad between valve body and the valve gap, the upper end of valve body has step groove and second seal groove, the lower extreme of valve gap has ka tai and third seal groove, and the gasket can block between step groove and ka tai, and the lower extreme of sealed pad has can block into the big sealing of second seal groove, and the upper end of sealed pad has can block into the little sealing of third seal groove.

Preferably, a valve rod nut is sleeved on the upper portion of the valve rod, the lower portion of the valve rod nut extends into an annular cavity at the upper end of the support, and a bearing gland is arranged between the valve rod nut and the upper portion of the annular cavity.

Preferably, the hand wheel is connected on the periphery on valve-stem nut upper portion, valve-stem nut's upper end still is connected with and contradicts in the lock nut of hand wheel upper end.

To sum up, the utility model discloses beneficial effect does:

1. the sealing performance of the sealing surface of the gate valve can be effectively improved by adopting the modes of middle soft sealing and two sides hard sealing, and the operation safety of the gate valve is greatly improved, so that the actual use requirement can be better met;

2. the soft sealing element adopts a sealing ring, and the hard sealing element and the flashboard sealing block both adopt hard alloy, so that the sealing device has better sealing performance;

3. the connecting head and the connecting groove are arranged to lead the valve rod to be lifted together with the flashboard when lifted, thereby conveniently opening or closing the valve;

4. the sealing gasket can be clamped into the large sealing part of the second sealing groove and the small sealing part of the third sealing groove through the arrangement, so that good sealing can be formed between the valve cover and the valve body.

The invention is further described with reference to the accompanying drawings and the detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 inventive exercise.

FIG. 1 is a schematic sectional view of the overall structure of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

FIG. 4 is an enlarged view of a portion of FIG. 1 at C;

FIG. 5 is an enlarged view of a portion of FIG. 1 at D;

marked in the figure, 1-valve body, 2-flashboard, 3-valve rod, 4-valve cover, 5-bracket, 6-handwheel, 7-fluid channel, 8-hard sealing element, 9-flashboard sealing block, 10-sealing ring, 11-first sealing groove, 12-connector, 13-connecting groove, 14-limiting table, 15-groove, 16-arc groove, 17-packing, 18-movable joint bolt, 19-packing gland, 20-pin shaft, 21-gasket, 22-sealing gasket, 23-step groove, 24-second sealing groove, 25-clamping table, 26-third sealing groove, 27-large sealing part, 28-small sealing part, 29-valve rod nut, 30-bearing gland, 31-bearing, 32-locking nut, 33-supporting sleeve and 34-locking washer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 5 in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In order to make the purpose, technical solution and advantages of the present invention clearer, the following will combine the drawings in the embodiments of the present invention to perform more detailed description on the technical solution in the embodiments of the present invention.

As shown in fig. 1 to 5, the gate valve disclosed in this embodiment includes a valve body 1, a gate plate 2, a valve rod 3, a valve cap 4, a bracket 5 and a hand wheel 6, the valve cover 4 is sleeved on the valve rod 3 and fixed on the valve body 1, the lower part of the valve body 1 is provided with a fluid channel 7, the upper end of the valve cover 4 is fixedly connected with the bracket 5, the upper part of the valve rod 3 passes through the bracket 5 and is connected with the hand wheel 6, the flashboard 2 is connected with the lower end of the valve rod 3, the gate plate 2 is positioned in the lifting channel in the middle of the fluid channel 7, the gate plate 2 is in a wedge shape with a small lower end and a large upper end, sealing surfaces are arranged on two sides of the flashboard 2, a hard sealing piece 8 is arranged on the inner wall of the lifting channel, a soft sealing piece is embedded in the middle of the hard sealing piece 8, and the sealing surfaces of the flashboards 2 are provided with flashboard sealing blocks 9 which can be abutted against the hard sealing pieces 8 and the soft sealing pieces.

In the above technical scheme, can make valve rod 3 go up and down when rotating hand wheel 6, can drive flashboard 2 go up and down in the lift passageway when valve rod 3 goes up and down, the floodgate valve is opened entirely when flashboard 2 rises to extreme position, flashboard sealing block 9 can extrude hard sealing member 8 and soft sealing member simultaneously when flashboard 2 descends, because soft sealing member inlays and establishes the middle part at hard sealing member 8, the hard sealing member 8 of soft sealing member both sides can form hard sealing with flashboard sealing block 9, soft sealing member can form soft sealing with flashboard sealing block 9, soft sealing in the middle of through adopting, the sealed face's of gate valve sealing performance can effectively be improved to the sealed face's of both sides mode hard sealing, the security of gate valve operation has also been increased substantially, thereby can satisfy the in-service use demand. The soft sealing element is made of soft materials such as synthetic rubber, polytetrafluoroethylene and the like.

In order to facilitate assembly and have better sealing performance, the soft sealing element is a sealing ring 10, and a first sealing groove 11 matched with the sealing ring 10 is arranged in the middle of the hard sealing element 8. The middle part of hard sealing member 8 is equipped with the first seal groove 11 of indent, and sealing washer 10 can block in first seal groove 11, and flashboard seal block 9 can extrude hard sealing member 8 and sealing washer 10 simultaneously when flashboard 2 descends to can have better sealing performance. The sealing ring 10 is known in the art and will not be described in detail here.

Preferably, the hard seal 8 and the gate seal block 9 are made of hard alloy. In this embodiment, the hard seal 8 and the shutter seal block 9 are made of STL alloy, which is durable and can form a hard seal better. The cemented carbide is prior art and will not be described in detail herein.

In order to facilitate the connection of the valve rod 3 and the gate plate 2, the lower end of the valve rod 3 is provided with a connector 12, the upper end of the gate plate 2 is provided with a connecting groove 13 matched with the connector 12, and the outer side of the connecting groove 13 is provided with a limiting table 14. The connector 12 and the valve rod 3 are integrally formed, the connector 12 is clamped into the connecting groove 13 of the flashboard 2, and then the limiting table 14 can limit the connector 12, so that the valve rod 3 can be driven to lift together when lifting, and the valve can be conveniently opened or closed.

Preferably, a groove 15 is formed at the bottom of the lifting channel, and an inner concave arc-shaped groove 16 is formed at the lower end of the gate plate 2. The bottom of lift passageway sets up recess 15 and can be convenient for after flashboard 2 descends and the inner wall of lift passageway forms sealedly, flashboard 2 when descending in the lift passageway, recess 15 and the extrusion medium of remaining in recess 15 can be gone into to the lower extreme of flashboard 2, arc wall 16 through setting up the indent at the lower extreme of flashboard 2, can crowd the medium into arc wall 16 when the medium is remained in the extrusion of 2 lower extremes of flashboard, avoided remaining the medium by exerting pressure to flashboard 2 after the extrusion, thereby can be convenient for form sealedly better with the inner wall of lift passageway after 2 decline of flashboard.

Preferably, a packing 17 is disposed between the middle portion of the valve rod 3 and the valve cover 4, a packing gland 19 is connected to the upper end of the valve cover 4 through an articulated bolt 18, and the packing gland 19 abuts against the upper end of the packing 17. In this embodiment, the lower end of the swing bolt 18 is connected to the upper end of the valve cover 4 through a pin 20, the upper end of the swing bolt 18 is connected to a nut, so that the pre-tightening force and the anti-loosening performance borne by the packing gland 19 can be improved, and the packing 17 is made of flexible graphite. The swing bolt 18, the packing 17 and the pin shaft 20 belong to the prior art and are not described in detail herein.

In order to have better sealing performance, the valve cover 4 is fixed through threaded connection in the upper end of the valve body 1 be equipped with gasket 21 and sealed 22 between valve body 1 and the valve cover 4, the upper end of valve body 1 has step groove 23 and second seal groove 24, the lower extreme of valve cover 4 has ka tai 25 and third seal groove 26, gasket 21 can block between step groove 23 and ka tai 25, and the lower extreme of sealed 22 has can block into the big sealing 27 of second seal groove 24, and the upper end of sealed 22 has can block into the little sealing 28 of third seal groove 26. Valve gap 4 is fixed through a plurality of bolts in the upper end of valve body 1, the card platform 25 of valve gap 4 just can block into the step groove 23 of valve body 1, step groove 23 can play the positioning action to valve gap 4, it can play preliminary sealed effect to set up gasket 21, sealed pad 22 can block into second seal groove 24's big sealing 27 and can block into the little sealing 28 of third seal groove 26 through setting up, thereby can form good sealing between valve gap 4 and valve body 1, can guarantee the leakproofness of long-term use, the holistic life of gate valve has been improved.

Preferably, a valve rod nut 29 is sleeved on the upper part of the valve rod 3, the lower part of the valve rod nut 29 extends into an annular cavity at the upper end of the bracket 5, and a bearing gland 30 is arranged between the valve rod nut 29 and the upper part of the annular cavity. In this embodiment, a bearing 31 is disposed between the lower end of the stem nut 29 and the bearing gland 30, so that the stem nut 29 can rotate better, and the bearing gland 30 is in interference fit with the bracket 5, so that the bearing gland 30 can abut against one side of the bearing 31.

As a preferred technical solution, the hand wheel 6 is connected to the periphery of the upper portion of the stem nut 29, and the upper end of the stem nut 29 is further connected to a lock nut 32 abutting against the upper end of the hand wheel 6. In this embodiment, a support sleeve 33 is arranged between the bearing gland 30 and the valve rod nut 29, the height of the support sleeve 33 is larger than that of the bearing gland 30, a lock washer 34 is further arranged between the lock nut 32 and the hand wheel 6, the hand wheel 6 and the valve rod nut 29 are fixed together after the lock nut 32 is locked, the hand wheel 6 can be rotated with the valve rod nut 29, the valve rod nut 29 can be driven to lift and lower the valve rod 3 and the gate plate 2 after being rotated, and the support sleeve 33 is larger than the bearing gland 30 and can better play a supporting role.

The working mode is as follows: when the gate valve needs to be completely closed, the hand wheel 6 is rotated to drive the valve rod nut 29 to rotate, the valve rod nut 29 drives the valve rod 3 to move downwards, the valve rod 3 moves downwards to enable the gate plate 2 to be inserted into the lifting channel, the fluid channel 7 can be blocked through the gate plate 2, media cannot circulate, the gate valve is closed, the gate plate sealing block 9 abuts against the hard sealing piece 8 and the sealing ring 10, a sealing mode of middle soft sealing and two sides hard sealing can be formed, and a good sealing effect can be achieved; on the contrary, when the gate valve needs to be opened, the hand wheel 6 is rotated reversely so that the valve rod 3 drives the gate plate 2 to move upwards, the gate plate sealing block 9 does not conflict with the hard sealing piece 8 and the sealing ring 10, the medium can circulate, and the gate valve is opened.

The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concept is not limited to this embodiment, and any modification that utilizes the inventive concept is intended to be within the scope of the present patent application.

Claims

1. A gate valve, characterized in that: including valve body, flashboard, valve rod, valve gap, support and hand wheel, the valve gap cover is located on the valve rod and is fixed on the valve body, the lower part of valve body has fluid passage, the upper end fixedly connected with of valve gap the support, the upper portion of valve rod is passed the support just is connected with the hand wheel, the flashboard is connected the lower extreme of valve rod, just the flashboard is located in the lift passageway at fluid passage middle part, the flashboard is the little big wedge in upper end of lower extreme, the both sides of flashboard all have sealed face, be equipped with hard sealing member on the inner wall of lift passageway, the middle part of hard sealing member inlays and is equipped with soft sealing member, all have on the sealed face of flashboard can contradict in the flashboard sealing block of hard sealing member and.

2. A gate valve according to claim 1, characterised in that: the soft sealing element is a sealing ring, and the middle part of the hard sealing element is provided with a first sealing groove matched with the sealing ring.

3. A gate valve according to claim 2, characterised in that: and the hard sealing piece and the flashboard sealing block are made of hard alloy.

4. A gate valve according to claim 3, characterised in that: the lower extreme of valve rod has the connector, the upper end of flashboard have with the spread groove of connector adaptation, the outside of spread groove has spacing platform.

5. A gate valve according to claim 4, characterized in that: the bottom of the lifting channel is provided with a groove, and the lower end of the flashboard is provided with an inwards concave arc-shaped groove.

6. A gate valve according to claim 5, characterised in that: and a packing is arranged between the middle part of the valve rod and the valve cover, the upper end of the valve cover is connected with a packing gland through an eyelet bolt, and the packing gland is abutted against the upper end of the packing.

7. A gate valve according to claim 6, characterised in that: the valve gap passes through threaded connection to be fixed the upper end of valve body be equipped with gasket and sealed pad between valve body and the valve gap, the upper end of valve body has step groove and second seal groove, the lower extreme of valve gap has ka tai and third seal groove, and the gasket can block between step groove and ka tai, and the lower extreme of sealed pad has can block into the big sealing portion of second seal groove, and the upper end of sealed pad has can block into the little sealing portion of third seal groove.

8. A gate valve according to claim 7, characterized in that: the upper portion of the valve rod is sleeved with a valve rod nut, the lower portion of the valve rod nut extends into an annular cavity at the upper end of the support, and a bearing gland is arranged between the valve rod nut and the upper portion of the annular cavity.

9. A gate valve according to claim 8, characterised in that: the hand wheel is connected on the periphery on valve-stem nut upper portion, valve-stem nut's upper end still is connected with and contradicts in the lock nut of hand wheel upper end.