CN110440010B

CN110440010B - Stop valve

Info

Publication number: CN110440010B
Application number: CN201910750501.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Yunda Fluid Intelligent Control Co ltd
Current assignee: ZHEJIANG YUNDA FLUID INTELLIGENT CONTROL Co.,Ltd.
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-12-08
Anticipated expiration: 2039-08-14
Also published as: CN110440010A

Abstract

The invention discloses a stop valve, which comprises a valve body, wherein an inlet flow passage and an outlet flow passage are arranged in the valve body, a valve hole for communicating the inlet flow passage and the outlet flow passage is arranged in the valve body along the vertical direction, an upper port communicated with the outlet flow passage is arranged above the valve hole in the valve body, a lower port communicated with the inlet flow passage is arranged below the valve hole, an upper end cover is arranged at the upper port of the valve body, and a lower end cover is arranged at the lower port of the valve body; a valve rod is arranged in the upper end cover, and a valve clack is arranged at the lower end of the valve rod; the upper end of the valve hole in the valve body is provided with a first sealing surface, and the lower end of the valve clack is provided with a second sealing surface; the valve body is internally provided with a scraping assembly at the upper end of the valve hole, and the scraping assembly is used for scraping media adhered to the first sealing surface and the second sealing surface; the lower end cover is provided with a driving component for driving the scraping component to act; the stop valve is simple in structure, good in sealing performance and long in service life.

Description

Stop valve

Technical Field

The invention belongs to the technical field of pipeline valves, and particularly relates to a stop valve used under the working condition of a medium containing solid particles or having viscosity.

Background

The stop valve is an extremely important class of valve that cuts, and its is sealed through applying the moment of torsion to the valve rod, and the valve rod is to valve clack application pressure in the axial direction, makes the sealed face of valve clack and the sealed face of disk seat closely laminate, prevents that the medium from leaking along the gap between the sealed face, and the sealed pair of stop valve comprises the sealed face of valve clack and the sealed face of disk seat, and the valve rod drives the valve clack and makes vertical motion along the central line of disk seat, and its shortcoming lies in: when the traditional stop valve is used for media such as ore pulp with viscosity and containing solid particles, the media are easily adhered to the sealing pair, so that the sealing surface of the valve clack and the sealing surface of the valve seat cannot be tightly combined, leakage is generated, meanwhile, the solid particles contained in the media are clamped on the sealing pair, the sealing pair is easily damaged, and the service life is short.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a stop valve which is simple in structure, good in sealing performance and long in service life.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a stop valve comprises a valve body, wherein an inlet flow passage and an outlet flow passage are arranged in the valve body, a valve hole for communicating the inlet flow passage and the outlet flow passage is arranged in the valve body along the vertical direction, an upper port communicated with the outlet flow passage is arranged above the valve hole in the valve body, a lower port communicated with the inlet flow passage is arranged below the valve hole, an upper end cover is arranged at the upper port of the valve body, and a lower end cover is arranged at the lower port of the valve body; a valve rod is arranged in the upper end cover, and a valve clack used for controlling the on-off of a valve hole is arranged at the lower end of the valve rod; the upper end of the valve hole in the valve body is provided with a first sealing surface, and the lower end of the valve clack is provided with a second sealing surface matched with the first sealing surface; the valve body is internally provided with a scraping assembly at the upper end of the valve hole, and the scraping assembly is used for scraping media adhered to the first sealing surface and the second sealing surface; and the lower end cover is provided with a driving assembly for driving the scraping assembly to move.

Through the technical scheme, this stop valve is when needs strike off the medium of adhesion on first sealed face and the sealed face of second, at first mention the valve clack through the valve rod, make the sealed face separation of first sealed face and second, then drive through drive assembly and strike off the subassembly and move a little, rethread valve rod control valve clack is on striking off the subassembly after that, then drive through drive assembly and strike off the subassembly and move completely and strike off the medium of adhesion on first sealed face and the sealed face of second and strike off, this stop valve is simple structure not only, and the leakproofness is good, long service life.

In a further technical scheme, the scraping assembly comprises a rotary ring, a power rotary sleeve and a housing, and six inclined grooves are uniformly arranged in the valve body at intervals around the first sealing surface by taking the axis of the valve hole as the center; the valve comprises a valve body, a valve hole, a valve cover and a valve cover, wherein the valve cover is fixedly arranged in the valve body and positioned at the upper end of the valve hole; six scrapers which correspond to the chutes one by one are arranged in the housing, each scraper is provided with a lower convex column extending into the corresponding chute, the rotating ring is rotationally connected in the housing, and the rotating ring and the valve hole are coaxially arranged; six power sliding grooves which correspond to the scrapers one by one are uniformly arranged on the rotating ring at intervals by taking the axis of the valve hole as a center, the power sliding grooves are arranged along the radial direction of the rotating ring, and the upper end of each scraper is provided with an upper convex column which extends into the corresponding power sliding groove; the power rotating sleeve is arranged along the vertical direction and is rotationally connected to the housing, and a power gear is arranged on the power rotating sleeve and is positioned in the housing; the outer side of the rotating ring is provided with convex teeth meshed with the power gear; when the power rotating sleeve rotates, the rotating ring is driven to rotate through the meshing of the power gear and the convex teeth, the scraper is driven to rotate around the valve hole through the matching of the power sliding groove on the rotating ring and the upper convex column, and the scraper is driven to move towards the direction close to or far away from the center of the valve hole through the matching of the lower convex column and the inclined groove on the scraper when the scraper rotates.

According to the technical scheme, when the power rotating sleeve rotates clockwise, the power gear is matched with the convex teeth to drive the rotating ring to rotate anticlockwise, the power sliding chute on the rotating ring is matched with the upper convex column to drive the scraper to rotate anticlockwise around the valve hole when the rotating ring rotates, and the lower convex column on the scraper is matched with the inclined chute when the scraper rotates to drive the scraper to move towards the direction close to the center of the valve hole; when the power rotating sleeve rotates anticlockwise, the rotating ring is driven to rotate clockwise through the matching of the power gear and the convex teeth, the scraper is driven to rotate clockwise around the valve hole through the matching of the power sliding chute on the rotating ring and the upper convex column when the rotating ring rotates, and the scraper is driven to move towards the direction far away from the center of the valve hole through the matching of the lower convex column on the scraper and the inclined chute when the scraper rotates; in addition, when the six scrapers move, the inclined planes between the two adjacent scrapers are matched with each other, so that the six scrapers synchronously and stably move.

In a further technical scheme, a top cover is fixedly mounted at the upper end of the upper end cover, a rotating groove is formed in the top cover at the position of a valve rod, a rotating block is rotatably connected in the rotating groove, a threaded hole is formed in the rotating block, and the valve rod is located in the threaded hole and provided with an external thread matched with the threaded hole; a pressing plate for preventing the rotating block from separating from the rotating groove is fixedly arranged on the top cover; and a rotating rod is fixedly arranged on the rotating block.

According to the technical scheme, when the valve rod is controlled to move up and down, the valve rod can be fixed through the upper end of the valve rod, then the rotating block is rotated through the rotating rod, and the valve rod can move up and down through the matching of the threaded hole and the external thread on the rotating block when the rotating block rotates; the valve rod can also be moved up and down by fixing the rotating rod and then rotating the valve rod.

In a further technical scheme, the driving assembly comprises a handle rod, a sliding rod and a top rod, the lower end of the lower end cover is provided with a frame rod extending downwards, and the handle rod is hinged to the lower end of the frame rod; the sliding rod is connected in the lower end cover in a sliding mode and is coaxial with the valve hole; one end of the handle rod is provided with a sliding groove along the length direction, and the lower end of the sliding rod is provided with a convex rod extending into the sliding groove; the upper end of the sliding rod is positioned in the valve body, a supporting rod is arranged on the side surface of the sliding rod close to the upper end of the sliding rod, the ejector rod is positioned on the supporting rod, an inserting hole which is coaxial with the power rotating sleeve is formed in the valve body along the vertical direction, and the upper end of the ejector rod penetrates through the inserting hole and extends into the power rotating sleeve; the inner wall of the power rotating sleeve is provided with a spiral sliding groove and a rotation stopping groove, the upper end of the rotation stopping groove is communicated with the spiral sliding groove, and the rotation stopping groove is arranged along the length direction of the power rotating sleeve; the side surface of the ejector rod is provided with an ejector column matched with the rotation stopping groove and the spiral sliding groove; when the jacking column moves upwards into the spiral chute, the power rotating sleeve is driven to rotate through the matching of the jacking column and the spiral chute.

According to the technical scheme, one end of the handle rod is pulled downwards to enable the other end of the handle rod to move upwards, when the other end of the handle rod moves upwards, the sliding rod is driven to move upwards through the matching of the sliding groove and the convex rod, when the sliding rod moves upwards, the ejector rod is driven to move upwards through the supporting rod, when the ejector rod moves upwards, the ejector rod drives the ejector column to move in the rotation stopping groove firstly, and when the ejector rod moves into the spiral sliding groove, the power rotating sleeve is driven to rotate; in a similar way, the one end of the handle rod is pressed upwards, so that the other end of the handle rod moves downwards, the other end of the handle rod moves downwards and drives the sliding rod to move downwards through the matching of the sliding groove and the convex rod, the sliding rod drives the ejector rod to move downwards through the supporting rod during downward movement, the ejector rod drives the ejection column to move in the spiral sliding groove to drive the power rotating sleeve to rotate reversely, and the power rotating sleeve stops rotating when the ejection column moves to the rotation stopping groove.

In a further technical scheme, a convex sleeve extending downwards is arranged at the through hole in the housing, and the rotating ring is rotatably connected in the convex sleeve.

In a further technical scheme, the upper end of the sliding rod is provided with a plug body used for extending into the valve hole, when the top column is located at the lower end of the rotation stopping groove, the plug body leaves the valve hole, and when the top column is located at the upper end of the rotation stopping groove, the plug body is located in the valve hole.

Through above-mentioned technical scheme, before scraping off the medium that adheres on first sealed face and second sealed face, the slide bar upward movement makes the cock body get into the valve hole to guarantee the effective of stop valve when scraping off the medium that adheres on first sealed face and the second sealed face.

(III) advantageous effects

Compared with the prior art, the technical scheme of the invention has the following advantages:

this stop valve is when needs strike off the medium of adhesion on first sealed face and the sealed face of second, at first mention the valve clack through the valve rod for the sealed face separation of first sealed face and second, then drive through drive assembly and strike off the subassembly and move a little, rethread valve rod control valve clack is pressed on striking off the subassembly after that, then drive through drive assembly and strike off the subassembly and move completely and strike off the medium of adhesion on first sealed face and the sealed face of second and strike off, this stop valve is simple structure not only, and the leakproofness is good moreover, long service life.

Drawings

FIG. 1 is a schematic structural view of the present invention with the valve flap in a closed state;

FIGS. 2-4 are schematic views illustrating the operation of scraping off the adhesive medium according to the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 2;

fig. 6-9 are schematic views of the scraper assembly of the present invention;

fig. 10 is a structural view of a power swivel in the present invention.

Detailed Description

Referring to fig. 1 to 10, a stop valve includes a valve body 1, an inlet flow passage 101 and an outlet flow passage 102 are arranged in the valve body 1, a valve hole 103 for communicating the inlet flow passage 101 and the outlet flow passage 102 is arranged in the valve body 1 along a vertical direction, an upper port 104 communicated with the outlet flow passage 102 is arranged above the valve hole 103 in the valve body 1, a lower port 105 communicated with the inlet flow passage 101 is arranged below the valve hole 103, an upper end cover 2 is arranged at the upper port 104 of the valve body 1, and a lower end cover 7 is arranged at the lower port 105; a valve rod 3 is arranged in the upper end cover 2, and a valve clack 301 for controlling the on-off of a valve hole 103 is arranged at the lower end of the valve rod 3; a first sealing surface 107 is arranged at the upper end of the valve hole 103 in the valve body 1, and a second sealing surface 302 matched with the first sealing surface 107 is arranged at the lower end of the valve clack 301; a scraping component is arranged at the upper end of the valve hole 103 in the valve body 1 and is used for scraping media adhered to the first sealing surface 107 and the second sealing surface 302; and the lower end cover 7 is provided with a driving assembly for driving the scraping assembly to act.

The scraping assembly comprises a rotary ring 9, a power rotary sleeve 4 and a housing 5, wherein six inclined grooves 108 are uniformly arranged around a first sealing surface 107 in the valve body 1 at intervals by taking the axis of a valve hole 103 as the center; the valve body is characterized in that the housing 5 is fixedly arranged in the valve body 1 and positioned at the upper end of the valve hole 103, a through hole 501 for the valve clack 301 to pass through is formed in the housing 5, and the through hole 501 and the valve hole 103 are coaxially arranged; six scrapers 10 which correspond to the inclined grooves 108 one by one are arranged in the housing 5, each scraper 10 is provided with a lower convex column 10a extending into the corresponding inclined groove 108, the rotating ring 9 is rotatably connected in the housing 5, a convex sleeve 502 extending downwards is arranged at a through hole 501 in the housing 5, and the rotating ring 9 is rotatably connected in the convex sleeve 502. The rotary ring 9 is coaxially arranged with the valve hole 103; six power sliding grooves 901 which correspond to the scrapers 10 one by one are uniformly arranged on the rotating ring 9 at intervals by taking the axis of the valve hole 103 as the center, the power sliding grooves 901 are arranged along the radial direction of the rotating ring 9, and the upper end of each scraper 10 is provided with an upper convex column 10b which extends into the corresponding power sliding groove 901; the power rotating sleeve 4 is arranged in the vertical direction and is rotatably connected to the housing 5, the power gear 43 is arranged on the power rotating sleeve 4, and the power gear 43 is positioned in the housing 5; the outer side of the rotating ring 9 is provided with a convex tooth 902 engaged with the power gear 43; when the power rotating sleeve 4 rotates, the power gear 43 is meshed with the convex teeth 902 to drive the rotating ring 9 to rotate, the scraper 10 is driven to rotate around the valve hole 103 through the matching of the power sliding groove 901 and the upper convex column 10b on the rotating ring 9, and the scraper 10 is driven to move towards the direction close to or far away from the center of the valve hole 103 through the matching of the lower convex column 10a and the inclined groove 108 on the scraper 10 when the scraper 10 rotates.

A top cover 6 is fixedly installed at the upper end of the upper end cover 2, a rotating groove 601 is formed in the position of the valve rod 3 of the top cover 6, a rotating block 77 is rotatably connected in the rotating groove 601, a threaded hole is formed in the rotating block 77, and the valve rod 3 is located in the threaded hole and is provided with an external thread matched with the threaded hole; a pressing plate 78 for preventing the rotating block 77 from being separated from the rotating groove 601 is fixedly arranged on the top cover 6; a rotating rod 79 is fixedly mounted on the rotating block 77.

The driving assembly comprises a handle rod 16, a sliding rod 8 and a top rod 81, the lower end of the lower end cover 7 is provided with a frame rod 17 extending downwards, and the handle rod 16 is hinged to the lower end of the frame rod 17; the sliding rod 8 is connected in the lower end cover 7 in a sliding manner and is coaxially arranged with the valve hole 103; one end of the handle rod 16 is provided with a sliding groove 16a along the length direction, and the lower end of the sliding rod 8 is provided with a convex rod 8a extending into the sliding groove 16 a; the upper end of the sliding rod 8 is positioned in the valve body 1, and the upper end of the sliding rod 8 is provided with a plug body 82 which is used for extending into the valve hole 103. A support rod 88 is arranged on the side surface of the sliding rod 8 close to the upper end, the ejector rod 81 is positioned on the support rod 88, an inserting hole 109 which is coaxial with the power rotating sleeve 4 is arranged in the valve body 1 along the vertical direction, and the upper end of the ejector rod 81 penetrates through the inserting hole 109 and extends into the power rotating sleeve 4; the inner wall of the power rotating sleeve 4 is provided with a spiral chute 42 and a rotation stopping groove 41 with the upper end communicated with the spiral chute 42, and the rotation stopping groove 41 is arranged along the length direction of the power rotating sleeve 4; the side surface of the ejector rod 81 is provided with an ejector column 811 matched with the rotation stopping groove 41 and the spiral sliding groove 42; when the top post 811 moves upwards into the spiral chute 42, the power rotary sleeve 4 is driven to rotate through the matching of the top post 811 and the spiral chute 42. When the top post 811 is positioned at the lower end of the detent groove 41, the plug 82 is separated from the valve hole 103, and when the top post 811 is positioned at the upper end of the detent groove 41, the plug 82 is positioned in the valve hole 103.

When a medium adhered to the first sealing surface 107 and the second sealing surface 302 needs to be scraped, one end of the handle rod 16 is pulled downwards at first, so that the other end of the handle rod 16 moves upwards, when the other end of the handle rod 16 moves upwards, the sliding rod 8 is driven to move upwards through the matching of the sliding groove 16a and the convex rod 8a, and when the sliding rod 8 moves upwards, on one hand, the supporting rod 88 drives the ejector rod 81 to move upwards, and on the other hand, the plug body 82 is driven to enter the valve hole 103 to realize the sealing of the valve hole 103; when the top rod 81 moves upwards, the top column 811 is driven to move in the rotation stopping groove 41; the flap 301 is then lifted by the valve stem 3, causing the first sealing surface 107 and the second sealing surface 302 to separate. Then one end of the handle lever 16 is continuously pulled downwards, so that the power rotating sleeve 4 rotates clockwise under the action of the top pillar 811 and the spiral sliding groove 42, when the power rotating sleeve 4 rotates clockwise, the rotating ring 9 is driven to rotate anticlockwise through the matching of the power gear 43 and the convex tooth 902, when the rotating ring 9 rotates, the scraper 10 is driven to rotate anticlockwise around the valve hole 103 through the matching of the power sliding groove 901 and the upper convex pillar 10b on the rotating ring, when the scraper 10 rotates, the scraper 10 is driven to move for a distance towards the center direction of the valve hole 103 through the matching of the lower convex pillar 10a and the inclined groove 108 on the scraper, and then the handle is stopped to be pulled downwards. The valve flap 301 is then pressed against the upper end face of the scraper 10 by the valve rod 3, and then one end of the handle lever 16 is pulled further downwards, so that the scraper 10 is fully extended, and the medium adhering to the first sealing surface 107 and the second sealing surface 302 is scraped off. The stop valve is simple in structure, good in sealing performance and long in service life. When the six scrapers 10 move, the inclined surfaces between two adjacent scrapers 10 are matched with each other, so that the six scrapers can synchronously and stably move, and simultaneously, media adhered to the first sealing surface 107 and the second sealing surface 302 are completely removed.

Similarly, when the scraper 10 is retracted, the valve flap 301 is controlled to move upwards through the valve rod 3, then one end of the handle rod 16 is pressed upwards, so that the other end of the handle rod 16 moves downwards, when the other end of the handle rod 16 moves downwards, the sliding rod 8 is driven to move downwards through the matching of the sliding groove 16a and the convex rod 8a, when the sliding rod 8 moves downwards, the ejector rod 81 is driven to move downwards through the support rod 88, and when the ejector rod 81 moves downwards, the ejector column 811 is driven to move in the spiral sliding groove 42 to drive the power rotating sleeve 4 to rotate reversely; when the power rotating sleeve 4 rotates anticlockwise, the power gear 43 is matched with the convex teeth 902 to drive the rotating ring 9 to rotate clockwise, when the rotating ring 9 rotates, the power sliding chute 901 on the rotating ring is matched with the upper convex column 10b to drive the scraper 10 to rotate clockwise around the valve hole 103, and when the scraper 10 rotates, the lower convex column 10a on the scraper is matched with the inclined chute 108 to drive the scraper 10 to move in the direction far away from the center of the valve hole 103 and retract into the housing 5; the plug 82 is still located in the valve bore 103 and is then pressed against the upper end of the valve bore 103 by the downward movement of the control flap 301 of the valve stem 3. Finally, the handle lever 16 is further pressed upwardly so that the top post 811 is at the lower end of the detent recess and the plug 82 is moved out of the valve opening 103.

In addition, when the valve rod 3 is controlled to move up and down, the valve rod 3 can be fixed through the upper end of the valve rod 3, then the rotating block 77 is rotated through the rotating rod 79, and the valve rod 3 can move up and down through the matching of a threaded hole and an external thread on the rotating block 77 when the rotating block 77 rotates; the up-and-down movement of the valve stem 3 may also be achieved by fixing the rotating rod 79 and then rotating the valve stem 3.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A stop valve comprises a valve body, wherein an inlet flow passage and an outlet flow passage are arranged in the valve body, and a valve hole for communicating the inlet flow passage and the outlet flow passage is arranged in the valve body along the vertical direction; a valve rod is arranged in the upper end cover, and a valve clack used for controlling the on-off of a valve hole is arranged at the lower end of the valve rod; the upper end of the valve hole in the valve body is provided with a first sealing surface, and the lower end of the valve clack is provided with a second sealing surface matched with the first sealing surface; the valve body is internally provided with a scraping assembly at the upper end of the valve hole, and the scraping assembly is used for scraping media adhered to the first sealing surface and the second sealing surface; the lower end cover is provided with a driving component for driving the scraping component to act;

the scraping assembly comprises a rotary ring, a power rotary sleeve and a housing, and six inclined grooves are uniformly arranged in the valve body at intervals around the first sealing surface by taking the axis of the valve hole as the center; the valve comprises a valve body, a valve hole, a valve cover and a valve cover, wherein the valve cover is fixedly arranged in the valve body and positioned at the upper end of the valve hole; six scrapers which correspond to the chutes one by one are arranged in the housing, each scraper is provided with a lower convex column extending into the corresponding chute, the rotating ring is rotationally connected in the housing, and the rotating ring and the valve hole are coaxially arranged; six power sliding grooves which correspond to the scrapers one by one are uniformly arranged on the rotating ring at intervals by taking the axis of the valve hole as a center, the power sliding grooves are arranged along the radial direction of the rotating ring, and the upper end of each scraper is provided with an upper convex column which extends into the corresponding power sliding groove; the power rotating sleeve is arranged along the vertical direction and is rotationally connected to the housing, and a power gear is arranged on the power rotating sleeve and is positioned in the housing; the outer side of the rotating ring is provided with convex teeth meshed with the power gear; when the power rotating sleeve rotates, the rotating ring is driven to rotate through the meshing of the power gear and the convex teeth, the scraper is driven to rotate around the valve hole through the matching of the power sliding groove on the rotating ring and the upper convex column, and the scraper is driven to move towards the direction close to or far away from the center of the valve hole through the matching of the lower convex column and the inclined groove on the scraper when the scraper rotates.

2. The stop valve according to claim 1, wherein a top cover is fixedly mounted at the upper end of the upper end cover, a rotating groove is formed in the top cover at the position of the valve rod, a rotating block is rotatably connected in the rotating groove, a threaded hole is formed in the rotating block, and the valve rod is located in the threaded hole and provided with an external thread matched with the threaded hole; a pressing plate for preventing the rotating block from separating from the rotating groove is fixedly arranged on the top cover; and a rotating rod is fixedly arranged on the rotating block.

3. The stop valve of claim 1, wherein the drive assembly comprises a handle bar, a sliding bar and a top bar, the lower end of the lower end cover is provided with a downwardly extending frame bar, and the handle bar is hinged at the lower end of the frame bar; the sliding rod is connected in the lower end cover in a sliding mode and is coaxial with the valve hole; one end of the handle rod is provided with a sliding groove along the length direction, and the lower end of the sliding rod is provided with a convex rod extending into the sliding groove; the upper end of the sliding rod is positioned in the valve body, a supporting rod is arranged on the side surface of the sliding rod close to the upper end of the sliding rod, the ejector rod is positioned on the supporting rod, an inserting hole which is coaxial with the power rotating sleeve is formed in the valve body along the vertical direction, and the upper end of the ejector rod penetrates through the inserting hole and extends into the power rotating sleeve; the inner wall of the power rotating sleeve is provided with a spiral sliding groove and a rotation stopping groove, the upper end of the rotation stopping groove is communicated with the spiral sliding groove, and the rotation stopping groove is arranged along the length direction of the power rotating sleeve; the side surface of the ejector rod is provided with an ejector column matched with the rotation stopping groove and the spiral sliding groove; when the jacking column moves upwards into the spiral chute, the power rotating sleeve is driven to rotate through the matching of the jacking column and the spiral chute.

4. The shut-off valve of claim 1, wherein the housing has a downwardly extending boss formed therein at the through hole, the swivel being rotatably connected within the boss.

5. The shut-off valve of claim 3, wherein the upper end of the sliding rod is provided with a plug body for extending into the valve bore, the plug body being displaced from the valve bore when the plunger is in the lower end position of the anti-rotation slot, and the plug body being positioned in the valve bore when the plunger is in the upper end position of the anti-rotation slot.