CN210318596U

CN210318596U - High-sealing gate valve

Info

Publication number: CN210318596U
Application number: CN201921162905.3U
Authority: CN
Inventors: 杨忠海
Original assignee: Zhejiang Mengzhou Valve Co ltd
Current assignee: Zhejiang Mengzhou Valve Co ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-04-14
Anticipated expiration: 2029-07-23

Abstract

The application provides a high sealing gate valve, wherein, include: valve body, flashboard, valve rod and valve gap, the valve gap overlap in connect on the valve rod on the valve body, the lower part of valve body has fluid passage, the upper end fixedly connected with support of valve gap, run through on the upper portion of valve rod 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 provided with first sealing member and second sealing member on the inner wall of lift passageway, all have on the sealed face of flashboard and keep out the flashboard sealing block on first sealing member and the second sealing member. The application provides a high sealing gate valve has improved the sealing performance of gate valve, has sealed effectual, long service life's advantage.

Description

High-sealing gate valve

Technical Field

The utility model relates to a control valve especially relates to a high sealing 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 gate valve on the market at present has reduced sealing performance after long-term use, and is easy to cause medium leakage, so the key of the development at present is how to improve the sealing performance of the valve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high sealing gate valve has improved the sealing performance of gate valve, has sealed effectual, long service life's advantage.

In order to solve the technical problem, the utility model provides a following technical scheme:

a high seal gate valve, comprising: valve body, flashboard, valve rod and valve gap, the valve gap overlap in connect on the valve rod on the valve body, the lower part of valve body has fluid passage, the upper end fixedly connected with support of valve gap, run through on the upper portion of valve rod 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 provided with first sealing member and second sealing member on the inner wall of lift passageway, all have on the sealed face of flashboard and keep out the flashboard sealing block on first sealing member and the second sealing member.

Furthermore, the second sealing element is embedded in the inner wall of the lifting channel, the protruding end of the second sealing element is provided with a wavy end face, and the wavy end face comprises two convex peaks and a concave peak connected between the two convex peaks.

Still further, the first seal is a hard seal, the first seal abutting against an underside of the second seal.

Furthermore, 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.

Furthermore, the valve cover is connected to the upper end of the valve body through a plurality of bolts, a sealing washer is arranged between the valve body and the valve cover, an upper arc-shaped block embedded in the valve cover is arranged at the upper end of the sealing washer, and a lower arc-shaped block embedded in the valve body is arranged at the lower end of the sealing washer.

Furthermore, 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.

Furthermore, the hand wheel is connected to the periphery of the upper portion of the valve rod nut, and the upper end of the valve rod nut is further connected with a locking nut which abuts against the upper end of the hand wheel.

Furthermore, the upper end of the valve rod nut is further connected with an indicating cylinder piece positioned on the upper side of the locking nut through threads, and the outer side of the indicating cylinder piece is provided with scale marks.

Furthermore, the indicating cylinder part is a transparent pipe, and the inner wall of the lower end of the indicating cylinder part is provided with an internal thread matched with the thread part at the upper end of the valve rod nut.

Further, the flashboard sealing block is higher than the sealing surface, and the flashboard sealing block is made of hard alloy.

According to the above technical scheme, the utility model discloses following beneficial effect has:

because the first sealing element and the second sealing element are arranged at the joint of the flashboard and the valve body, the double-sealing structure ensures zero leakage of the sealing surface of the gate valve through the combined use of soft and hard sealing, and the sealing performance is good;

because the protruding end of the second sealing element is provided with the wavy end face, when the high-seal gate valve is closed, the convex peak can be obliquely filled into the concave peak through extrusion, the sealing effect is improved, the abrasion and scratch of the second sealing element in the using process due to excessive extrusion force are avoided, and the sealing performance for long-term use is ensured.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1 according to the present invention.

Fig. 3 is a structural diagram of the second sealing member and the shutter sealing block of the present invention.

Fig. 4 is an enlarged view of a portion a of fig. 1 according to the present invention.

Fig. 5 is a half-section structure diagram of the valve-stem nut of the present invention.

Description of reference numerals: the valve comprises a valve body-1, a gate plate-2, a valve rod-3, a sealing washer-4, an upper arc-shaped block-41, a lower arc-shaped block-42, a nut-5, a bolt-6, a valve cover-7, a packing-8, a pin shaft-9, a packing gland-11, a swing bolt-12, a support-17, a valve rod nut-18, a bearing gland-19, a flat key-20, a hand wheel-21, a locking nut-22, an indicating cylinder-23, a scale mark-24, a gate plate sealing block-26, a first sealing element-27, a second sealing element-28, a wavy end face-281, a convex peak-282, a concave peak-283, a water inlet cavity-31 and a water outlet cavity-32.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

The present application is further described with reference to fig. 1 to 5, and a high seal gate valve as shown in fig. 1 includes: the valve comprises a valve body 1, a gate plate 2, a valve rod 3 and a valve cover 7, wherein the valve cover 7 is sleeved on the valve rod 3 and connected on the valve body 1, a fluid channel is arranged at the lower part of the valve body 1, a support 17 is fixedly connected to the upper end of the valve cover 7, the upper part of the valve rod 3 penetrates through the support 17 and is connected with a hand wheel 21, the gate plate 2 is connected to the lower end of the valve rod 3, the gate plate 2 is positioned in a lifting channel in the middle of the fluid channel, the lower end of the gate plate 2 is in a small wedge shape, the upper end of the gate plate 2 is in a large wedge shape, as shown in figure 2, sealing surfaces are arranged on two sides of the gate plate 2, a first sealing element 27 and a second sealing element 28 are arranged on the inner wall of the lifting channel, a gate plate sealing block 26 which abuts against the first sealing element 27 and the second sealing element 28 is, The soft materials such as rubber guarantee zero leakage of the sealing surface of the gate valve through combined use of soft and hard sealing, operation safety is greatly improved, sealing performance is good, and service life is long.

As shown in fig. 1, one side of the fluid channel is an inlet chamber 31, the other side of the fluid channel is an outlet chamber 32, and the lifting channel is located between the inlet chamber 31 and the outlet chamber 32.

As shown in fig. 2 and 3, the second sealing element 28 is embedded in the inner wall of the lifting channel, the protruding end of the second sealing element 28 has a wavy end surface 281, the wavy end surface 281 includes two convex peaks 282 and a concave peak 283 connected between the two convex peaks 282, when the high-sealing gate valve is closed, the gate plate sealing block 26 and the second sealing element 28 form a mutual pressing form, the convex peaks 282 can obliquely fill the concave peaks 283 through pressing, the sealing effect is improved, and the second sealing element 28 is prevented from being worn and scratched in the using process due to excessive pressing force, and the sealing performance in long-term use is ensured.

The first seal 27 is a hard seal, and the first seal 27 abuts against the lower side of the second seal 28.

As shown in fig. 1, a packing 8 is disposed between the middle portion of the valve rod 3 and the valve cover 7, a packing gland 11 is connected to the upper end of the valve cover 7 through a swing bolt 12, the packing gland 11 abuts against the upper end of the packing 8, specifically, the lower end of the swing bolt 12 is connected to the upper end of the valve cover 7 through a pin shaft 9, and the upper end of the swing bolt 12 is connected to a nut 5, so as to improve the pre-tightening force and the anti-loosening performance that the packing gland 11 can bear.

The packing 8 can greatly improve the sealing performance of the joint of the valve rod 3 and the valve cover 7, avoid the waste caused by the overflow of a medium in the gate valve, and greatly improve the overall sealing effect and prolong the service life.

The valve cover 7 is connected to the upper end of the valve body 1 through a plurality of bolts 6, and nuts 5 are connected to the bolts 6.

Be provided with seal ring 4 between valve body 1 and the valve gap 7, as shown in fig. 4, seal ring 4's upper end has to inlay and establishes last arc piece 41 in the valve gap 7, seal ring 4's lower extreme has to inlay and establishes lower arc piece 42 in the valve body 1, seal ring 4 makes form good sealing between valve body 1 and the valve gap 7, guarantees the leakproofness of long-term use, has improved holistic life.

The upper part of the valve rod 3 is sleeved with a valve rod nut 18, the lower part of the valve rod nut 18 extends into an annular cavity at the upper end of the bracket 17, and a bearing gland 19 is arranged between the valve rod nut 18 and the upper part of the annular cavity.

The hand wheel 21 is connected to the periphery of the upper portion of the valve stem nut 18 through a flat key 20, and the upper end of the valve stem nut 18 is further connected with a locking nut 22 which abuts against the upper end of the hand wheel 21.

As shown in fig. 1 and 5, an indicating cylinder member 23 located on the upper side of the lock nut 22 is further connected to the upper end of the stem nut 18 by a screw, and the outer side of the indicating cylinder member 23 has a scale line 24.

The utility model discloses a valve rod, including indicating cylinder piece 23, indicating cylinder piece 23 is the hyaline tube, have on the lower extreme inner wall of indicating cylinder piece 23 with the internal thread of the screw thread looks adaptation of valve rod nut 18 upper end, indicating cylinder piece 23 is installed and removed the convenience, rotates during the hand wheel 21, valve rod 3 follows the inside passage of indicating cylinder piece 23, the user observes the upper end of valve rod 3 with indicate cylinder piece 23 last scale mark 24 that corresponds, alright learn the aperture of flashboard 2, it is very convenient to use.

The gate plate sealing block 26 is higher than the sealing surface, and the gate plate sealing block 26 is made of hard alloy.

When the high-sealing gate valve needs to be completely closed, the hand wheel 21 is rotated to drive the valve rod nut 18 to rotate, the valve rod nut 18 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 water inlet cavity 31 and the water outlet cavity 32 are blocked through the gate plate 2, the medium cannot flow through, and the gate valve is closed; on the contrary, when the high-sealing gate valve needs to be opened, the hand wheel 21 is rotated reversely, so that the valve rod 3 drives the gate plate 2 to move upwards, the gate plate sealing block 26 is not abutted to the first sealing element 27 and the second sealing element 28 any more, the medium can circulate, and the gate valve is opened.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high seal gate valve, comprising: a valve body (1), a flashboard (2), a valve rod (3) and a valve cover (7), the valve cover (7) is sleeved on the valve rod (3) and connected on the valve body (1), the lower part of the valve body (1) is provided with a fluid channel, the upper end of the valve cover (7) is fixedly connected with a bracket (17), the upper part of the valve rod (3) penetrates through the bracket (17) and is connected with a hand wheel (21), the flashboard (2) is connected with the lower end of the valve rod (3), the flashboard (2) is positioned in the lifting channel in the middle of the fluid channel, the flashboard (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 first sealing element (27) and a second sealing element (28) are arranged on the inner wall of the lifting channel, the sealing surfaces of the flashboards (2) are provided with flashboard sealing blocks (26) which are abutted against the first sealing pieces (27) and the second sealing pieces (28).

2. The high seal gate valve of claim 1, wherein the second seal member (28) is embedded on the inner wall of the lift channel, the protruding end of the second seal member (28) having a wavy end surface (281), the wavy end surface (281) comprising two peaks (282) and a valley (283) connected between the two peaks (282).

3. High seal gate valve according to claim 2, characterized in that the first seal (27) is a hard seal, the first seal (27) bearing against the underside of the second seal (28).

4. High seal gate valve according to claim 3, characterized in that a packing (8) is arranged between the middle part of the valve stem (3) and the valve cover (7), a packing gland (11) is connected to the upper end of the valve cover (7) by means of an eye bolt (12), the packing gland (11) abutting against the upper end of the packing (8).

5. The high seal gate valve of claim 4, characterized in that the valve cover (7) is connected to the upper end of the valve body (1) by a plurality of bolts (6), a seal washer (4) is arranged between the valve body (1) and the valve cover (7), the upper end of the seal washer (4) is provided with an upper arc-shaped block (41) embedded in the valve cover (7), and the lower end of the seal washer (4) is provided with a lower arc-shaped block (42) embedded in the valve body (1).

6. High seal gate valve according to claim 5, characterized in that the upper part of the valve stem (3) is sleeved with a stem nut (18), the lower part of the stem nut (18) extends into the annular cavity at the upper end of the bracket (17), and a bearing gland (19) is arranged between the stem nut (18) and the upper part of the annular cavity.

7. The high seal gate valve of claim 6, characterized in that the hand wheel (21) is connected to the outer circumference of the upper part of the stem nut (18), and the upper end of the stem nut (18) is further connected with a lock nut (22) which abuts against the upper end of the hand wheel (21).

8. The high seal gate valve of claim 7, wherein the upper end of the stem nut (18) is further connected with an indicating cylinder member (23) on the upper side of the locknut (22) by a screw thread, and the outer side of the indicating cylinder member (23) is provided with a scale mark (24).

9. The high seal gate valve of claim 8, wherein the indicating cylinder member (23) is a transparent tube, and the inner wall of the lower end of the indicating cylinder member (23) has an internal thread adapted to the threaded portion of the upper end of the stem nut (18).

10. The high seal gate valve of claim 1, wherein the gate seal block (26) is raised above the seal face, the gate seal block (26) being cemented carbide.