CN106812953B

CN106812953B - Stop valve

Info

Publication number: CN106812953B
Application number: CN201710227668.3A
Authority: CN
Inventors: 陈德聪; 孙小媛
Original assignee: Yongjia Pinxin Valve Co ltd
Current assignee: Yongjia Pinxin Valve Co ltd
Priority date: 2017-04-10
Filing date: 2017-04-10
Publication date: 2023-06-27
Anticipated expiration: 2037-04-10
Also published as: CN106812953A

Abstract

The invention relates to the technical field of valves, in particular to a stop valve, which comprises a valve body, a valve rod, a valve clack, a support, an operation hand wheel and a limiting mechanism, wherein the bottom end of the valve rod extends into the valve body and is connected with the valve clack, the operation hand wheel is limited on the support in the axial direction and can rotate circumferentially, the limiting mechanism enables the circumferential limiting axial direction of the valve rod to displace upwards and downwards, the operation hand wheel is in spiral fit with the valve rod, and the stop valve further comprises a locking device, and the locking device is provided with a locking position for connecting the operation hand wheel with the valve rod to form circumferential limiting on the operation hand wheel and an unlocking position for enabling the operation hand wheel to rotate relative to the valve rod. The hand wheel is rotated, so that the valve rod drives the valve clack to move up and down to the stop valve to achieve the target flow, and the valve rod can only move up and down and can not rotate because of the limiting mechanism, and the operating hand wheel and the valve rod are connected through the locking device, so that the operating hand wheel is circumferentially limited, the operating hand wheel is locked and can not rotate, the positions of the valve rod and the valve clack are fixed, and the flow which can pass through the stop valve is fixed.

Description

Stop valve

Technical Field

The invention relates to the technical field of valves, in particular to a stop valve.

Background

The stop valve is also called as a stop valve, belongs to a forced sealing valve, and is widely applied to industries such as electric power, hydraulic power, chemical industry, oil refining, metallurgy and the like. The existing stop valve generally comprises a valve body, a valve rod, a valve clack, a support and an operation hand wheel, wherein the valve rod is enabled to move up and down by rotating the operation hand wheel in the working process, and the valve clack is driven to move so as to open or close the stop valve. For a fixed valve, the position of the valve clack determines the flow of the valve, and the flow can be controlled by rotating the operating hand wheel to adjust the position of the valve clack. When the flow of the valve is determined, the hand wheel is not rotated any more, at this time, the impact of the medium on the valve rod and the valve clack may cause the valve clack to displace to change the flow, and in addition, the misoperation of the hand wheel may be rotated to change the flow, so that the flow of the valve is difficult to fix.

Disclosure of Invention

The present invention addresses the above-described problems by providing a shut-off valve.

The technical scheme adopted by the invention is as follows: the utility model provides a stop valve, includes valve body, valve rod, valve clack, support, operation hand wheel and stop gear, the valve rod bottom stretches into in the valve body and connects the valve clack, but the operation hand wheel is spacing on the support and circumference rotation in axial direction, stop gear makes the spacing axial up-and-down displacement in valve rod circumference, the operation hand wheel is screw fit with the valve rod, still includes locking device, locking device has the lock position of connecting operation hand wheel and valve rod constitution circumference spacing to the operation hand wheel to and make the rotatable unblock position of operation hand wheel relative valve rod.

The upper end of the operating hand wheel is connected with a limiting block, the limiting block is in circumferential linkage with the operating hand wheel, the locking device comprises a lock pin, the limiting block is provided with a first through hole matched with the lock pin, the valve rod is provided with a corresponding second through hole, the lock pin is provided with a locking position which is inserted into the first through hole and the second through hole to form circumferential limiting on the operating hand wheel, and an unlocking position which is inserted into the first through hole or the second through hole or is not inserted into the operating hand wheel to enable the operating hand wheel to rotate relative to the valve rod.

The first through holes are bar-shaped grooves, or the second through holes are bar-shaped grooves.

The first through hole is a strip-shaped groove.

The number of the strip-shaped grooves is even, and the strip-shaped grooves are equally arranged around the shaft.

One end of the lock pin is connected with the limiting block through a chain.

The operation hand wheel comprises a hand wheel, a valve rod nut is arranged in the hand wheel, the valve rod nut is in circumferential linkage with the hand wheel, a groove is formed in the support, an extending part is arranged on the valve rod nut, the extending part is located in the groove and is limited by a gland, a bearing is arranged between the outer side of the upper part and the lower side of the extending part of the valve rod nut and the inner wall of the support, the valve rod nut is opposite to the support and can be rotated in the circumferential direction, and an inner cavity of the valve rod nut is in spiral connection with the valve rod.

The hand wheel is split with the valve rod nut, the polygonal groove is formed in the hand wheel, the polygonal groove is formed in the periphery of the valve rod nut, the polygonal groove is correspondingly provided with a corresponding polygonal periphery, the hand wheel is in circumferential linkage with the valve rod nut through the cooperation of the polygonal groove and the polygonal periphery, the valve rod nut is provided with a platform below the polygonal periphery, the nut is in threaded connection above the polygonal periphery, and the hand wheel is limited between the platform and the nut.

The valve body is fixedly provided with a support disc, the support disc is connected with a support rod through a support, the valve rod is connected with a limiting piece, the limiting piece is connected with the support rod, and the limiting piece enables the circumferential limiting shaft of the valve rod to be capable of moving up and down.

The middle part of the limiting piece is provided with a rectangular through hole, the length of the rectangular through hole is larger than or equal to the diameter of the valve rod, the width of the rectangular through hole is smaller than the diameter of the valve rod, the valve rod is provided with a limiting part matched with the rectangular through hole, two ends of the limiting piece are provided with clamping grooves matched with the supporting rod, and the limiting piece is formed by split folding of two limiting pieces and through bolting.

The beneficial effects of the invention are as follows: the hand wheel is rotated, so that the valve rod drives the valve clack to move up and down to the stop valve to achieve the target flow, and the valve rod can only move up and down and can not rotate because of the limiting mechanism, and the operating hand wheel and the valve rod are connected through the locking device, so that the operating hand wheel is circumferentially limited, the operating hand wheel is locked and can not rotate, the positions of the valve rod and the valve clack are fixed, and the flow which can pass through the stop valve is fixed.

Drawings

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

Fig. 2 is a schematic cross-sectional view of a stent.

Fig. 3 is a schematic cross-sectional view of a stop block.

Fig. 4 is a top view of the stop block.

Fig. 5 is a schematic view of the structure of the valve stem nut.

Fig. 6 is a top view of the valve stem nut.

Fig. 7 is a schematic structural view of a valve stem.

Fig. 8 is a schematic cross-sectional view of the valve stem at the limit stop.

Fig. 9 is a schematic cross-sectional view of the stop member.

In the figure, 1, a valve body; 2, valve rod; 201, a limiting part; 3, a valve clack; 4, a bracket; 401, grooves; 5, a hand wheel; 6, locking pins; 7, a valve rod nut; 701, polygonal outer perimeter; 702, a platform; 703, an extension; 8, capping; 9, a bearing; 10, limiting blocks; 11, a second through hole; 12, a first through hole; 13, supporting a rod; 14, a limiting piece; 1401, rectangular through holes; 1402, a clamping groove; 1403, the limiting piece is split; 15, a nut; and 16, a bracket tray.

Detailed Description

The invention will be better illustrated with reference to the following drawings and specific examples.

A stop valve is sequentially provided with a valve body 1, a valve clack 3, a bracket disc 16, a supporting rod 13, a bracket 4, an operation hand wheel and a limiting block 10 from bottom to top, wherein a valve rod 2 sequentially passes through the limiting block 10, the operation hand wheel and the bracket 4 from top to bottom, stretches into the valve body 1, is fixedly connected with the valve clack 3 at the end part, and is in spiral fit with the operation hand wheel, and the valve rod 2 is enabled to be vertically displaced by rotating the operation hand wheel. The upper end of the operating hand wheel is connected with a limiting block 10, the limiting block 10 is in circumferential linkage with the operating hand wheel, the valve rod 2 is provided with a second through hole 11, the second through hole 11 is a circular through hole, the limiting block 10 is provided with 4 first through holes 12, the first through holes 12 are bar-shaped grooves, when the valve rod 2 is positioned at a full opening state, the height of the upper end position of the first through holes 12 is greater than or equal to the height of the second through hole 11, and when the valve rod 2 is positioned at a full closing state, the height of the lower end position of the first through holes 12 is less than or equal to the height of the second through hole 11; the limiting block 10 is connected with a lock pin 6 through a chain, the widths of the lock pin 6, the first through hole 12 and the second through hole 11 are matched, when the first through hole 12 and the second through hole 11 correspond, the lock pin can be inserted into the first through hole 12 and the second through hole 11, so that the limiting block 10 is circumferentially limited, and the operating hand wheel is limited to be unable to rotate, so that the position of the valve rod is fixed.

The limiting block 10 is in linkage with the circumference of the operating hand wheel, the first through hole 12 can be directly formed in the operating hand wheel through the limiting block and the valve rod for locking, and the circumferential limiting of the operating hand wheel can be realized through the lock pin, however, the operating hand wheel is convenient to operate due to the fact that the holding part is required to be arranged, the first through hole 12 is arranged again, and the lock pin 6 penetrates through the first through hole 12, so that the operation is inconvenient.

Wherein, the first through hole 12 is a bar-shaped groove, or the second through hole 11 is a bar-shaped groove. The purpose of the provision of the strip-shaped groove is to allow the valve stem to be displaced up and down so that the first through hole 12 and the second through hole 11 can be opposed at different height positions and so that the lock pin can pass through the first through hole 12 and the second through hole 11. The first through hole 12 or the second through hole 11 may be a plurality of circular through holes and be spirally arranged around the shaft, but this is difficult to process and affects the strength of the stopper 10 or the valve rod 2.

Among them, the second through hole 11 is preferably a bar-shaped groove. If the first through holes 12 are bar-shaped grooves, it may be much more difficult to see from the smaller second through holes 11 whether the first through holes 12 are opposite to the second through holes 11, whereas from the larger first through holes 12 it is much simpler to see whether the first through holes 12 are corresponding to the second through holes 11.

The number of the strip-shaped grooves is four, and the strip-shaped grooves are equally arranged around the shaft, thus, the fixed unit is the distance for the displacement of the valve rod when the operating hand wheel rotates by 1/4 of a circle, moreover, the bolt can be inserted from one strip-shaped groove, pass through the second through hole 11 and extend from the strip-shaped groove on the other side, thus, the limit block 10 and the valve rod can be completely locked by the locking device, the force application is more balanced, and the unit for the adjustment is different. Locking may also be achieved if there are an odd number or unequal sets.

Wherein one end of the lock pin is connected with the limiting block 10 through a chain, so that the anti-lost and anti-theft effects can be realized.

The operation hand wheel comprises a hand wheel 5, a valve rod nut 7 is arranged in the hand wheel 5, and threads corresponding to each other are arranged outside the valve rod 2 and inside the valve rod nut 7; the support disc 16 is fixed outside the valve body 1, the support disc 16 is connected with the support 4 through 4 support rods 13 to fix the support 4, a groove 401 is formed in the support 4, an extending part 703 is formed in the valve rod nut 7, the extending part 703 is located in the groove 401 and limited by a gland 8, a bearing 9 is arranged between the outer sides above and below the extending part 703 and the inner wall of the support, and the valve rod nut 7 can circumferentially rotate relative to the support 4; the inside polygon recess that is equipped with of hand wheel 5, valve rod nut 7 periphery is equipped with corresponding polygon periphery 701 that the polygon recess was equipped with, makes operation hand wheel and valve rod nut 7 circumference linkage through polygon recess and polygon periphery 701 cooperation, polygon periphery 701 lower extreme is equipped with platform 702, there is nut 15 polygon periphery 701 top through threaded connection, the operation hand wheel is fixed between platform 702 and nut 15. When the operating hand wheel is rotated, the valve rod nut 7 rotates along with the operating hand wheel, the valve rod nut 7 is in threaded connection with the valve rod 2, the valve rod nut 7 is axially limited and does not move, the valve rod 2 rotates along with the operating hand wheel to move up and down, the valve clack 3 is driven to move, and therefore the stop valve is opened or closed, and the flow of the stop valve is changed. Limiting of the axial direction of the hand wheel is achieved through connection between the valve rod nut and the support 4, and therefore resistance is smaller during rotation. It is also possible to provide the inside of the hand wheel 5 and the outside of the valve stem 2 with mutually corresponding threads and to connect the hand wheel to the support, but the resistance to such rotation is much greater.

The hand wheel 5 and the valve rod nut 7 are split, so that the installation is more convenient, in addition, the disassembly and assembly are realized, and the subsequent maintenance and overhaul are facilitated.

The valve body 1 is fixedly provided with a support disc 16, the support disc 12 and the support 4 are connected with a support rod 13, the valve rod 2 is connected with a limiting piece 14, the limiting piece 14 is connected with the support rod 13, and the limiting piece 14 forms circumferential limiting on the valve rod 2. Realize through the locating part that valve rod circumference does not rotate, also can set up the flat key on the valve rod, set up corresponding recess on valve body or the support, make valve rod circumference not rotate through recess and flat key cooperation, processing is more complicated like this.

The middle part of the limiting piece 14 is provided with a rectangular through hole 1401, the length of the rectangular through hole 1401 is larger than or equal to the diameter of the valve rod 2, the width of the rectangular through hole 1401 is smaller than the diameter of the valve rod 2, the valve rod 2 is provided with a limiting part 201 matched with the rectangular through hole 1401, two ends of the limiting piece 14 are provided with clamping grooves 1402 matched with the supporting rods 13, and the limiting piece 14 is formed by folding two limiting piece split 1403 and connecting bolts. Thus facilitating production and installation.

The foregoing is merely one embodiment of the present invention, and is not intended to limit the scope of the present invention; the protection scope of the present invention is defined by the claims in the claims, and all equivalent changes and modifications made in accordance with the invention are within the protection scope of the present patent.

Claims

1. The utility model provides a stop valve, includes valve body (1), valve rod (2), valve clack (3), support (4), operation hand wheel and stop gear, valve rod (2) bottom stretches into in valve body (1) and connects valve clack (3), but operation hand wheel is spacing on the support and circumference rotation in axial direction, stop gear makes the spacing axial of valve rod (2) circumference displacement about can, operation hand wheel and valve rod (2) are screw-fit, its characterized in that: the locking device is provided with a locking position for connecting the operation hand wheel with the valve rod (2) to form circumferential limit and an unlocking position for enabling the operation hand wheel to rotate relative to the valve rod (2), the upper end of the operation hand wheel is connected with a limiting block (10), the limiting block (10) is in circumferential linkage with the operation hand wheel, the locking device comprises a lock pin (6), the limiting block (10) is provided with a first through hole (12) matched with the lock pin (6), the valve rod (2) is provided with a corresponding second through hole (11), the lock pin (6) is provided with a locking position for inserting the first through hole (12) and the second through hole (11) to form circumferential limit, and is provided with an unlocking position for inserting the first through hole (12) or the second through hole (11) or not inserting the operation hand wheel to rotate relative to the valve rod (2), a support plate (16) is fixed on the valve body (1), the support plate (16) is connected with a support rod (13) through the support frame (4), the valve rod (2) is connected with a limiting piece (14), the rectangular support rod (14) is connected with the lower through hole (14) to enable the middle part (14) to displace axially, the length of the rectangular through hole (1401) is larger than or equal to the diameter of the valve rod (2), the width of the rectangular through hole is smaller than the diameter of the valve rod (2), the valve rod (2) is provided with a limiting part (201) matched with the rectangular through hole (1401), two ends of the limiting part (14) are provided with clamping grooves (1402) matched with the supporting rods (13), and the limiting part (14) is formed by folding two limiting part split bodies (1403) and connecting bolts.

2. The shut-off valve of claim 1, wherein: the first through holes (12) are bar-shaped grooves, or the second through holes (11) are bar-shaped grooves.

3. The shut-off valve of claim 2, wherein: the first through hole (12) is a strip-shaped groove.

4. A shut-off valve according to claim 3, wherein: the number of the strip-shaped grooves is even, and the strip-shaped grooves are equally arranged around the shaft.

5. The shut-off valve of claim 1, wherein: one end of the lock pin is connected with the limiting block (10) through a chain.

6. The shut-off valve of claim 1, wherein: the operation hand wheel comprises a hand wheel (5), a valve rod nut (7) is arranged inside the hand wheel (5), the valve rod nut (7) and the hand wheel (5) are in circumferential linkage, a groove (401) is formed in the support (4), an extending part (703) is arranged on the valve rod nut (7), the extending part (703) is located in the groove (401), and is limited by a gland (8), a bearing (9) is arranged between the outer side of the extending part (703) and the lower side of the valve rod nut (7) and the inner wall of the support, the valve rod nut (7) can be rotated circumferentially relative to the support (4), and an inner cavity of the valve rod nut (7) is in spiral connection with the valve rod (2).

7. The shut-off valve of claim 6, wherein: the novel valve rod is characterized in that the hand wheel (5) and the valve rod nut (7) are split, a polygonal groove is formed in the hand wheel (5), a corresponding polygonal periphery (701) is arranged on the periphery of the valve rod nut (7), the hand wheel (5) and the valve rod nut (7) are in circumferential linkage through matching of the polygonal groove and the polygonal periphery (701), a platform (702) is arranged below the polygonal periphery (701) by the valve rod nut (7), a nut (15) is connected with threads above the polygonal periphery (701), and the hand wheel (5) is limited between the platform (702) and the nut (15).