CN112212021A

CN112212021A - Gate valve

Info

Publication number: CN112212021A
Application number: CN202011096342.XA
Authority: CN
Inventors: 任林赟; 王树旺
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-01-12

Abstract

The invention discloses a gate valve, which comprises a valve body, wherein a valve cavity with an opening at the upper end is arranged in the valve body, a first pipeline and a second pipeline which are communicated with the valve cavity are arranged on the side surface of the valve body, and the first pipeline and the second pipeline are coaxially arranged; the valve body is fixedly provided with a valve cover at an opening at the upper end of the valve cavity, the valve cover is internally threaded with a valve rod arranged along the vertical direction, and the lower end of the valve rod is positioned in the valve cavity and is provided with a valve block assembly for controlling the on-off of a first pipeline and a second pipeline; the valve block assembly comprises a cross rod, a first valve block and a second valve block, wherein the cross section of the first valve block and the cross section of the second valve block are square; the edges of the first valve block and the second valve block are rotatably connected through a hinge shaft; a conversion component for driving the hinge shaft to move along the limiting sliding groove is arranged in the valve body; the gate valve is simple to operate, and the sealing surface can be replaced on line.

Description

Gate valve

Technical Field

The invention belongs to the technical field of pipeline valves, and particularly relates to a gate valve.

Background

The gate valve is one of the most widely applied valves in various fluid conveying engineering, and is used as a cut-off device on fluid pipelines in the industries of building, urban environmental protection, petrifaction, medicine, food, metallurgy, textile, electric power and the like. Generally, the gate valve includes the valve body, and the valve body lower part has import and export, and the left end of import and the right-hand member of export all have sealed face, and the movive seal complex is equipped with the valve plate that can reciprocate and can not rotate between two sealed faces. Meanwhile, the upper part of the valve plate is connected with a valve rod, and the upper part of the valve rod is connected with a handle through a screw nut mechanism. After the handle rotates, the valve rod is driven to move up and down through the screw rod nut mechanism, then the valve plate moves up and down to seal or open the two sealing surfaces, and finally the feed port and the discharge port are communicated or cut off.

The valve plate of prior art gate valve can appear wearing and tearing after long-time the use, and sealed effect is greatly discounted then, causes the valve to reveal, influences the life of gate valve to when the valve plate damages and causes the leakage, need stop whole pipeline or equipment, pull down the gate valve and carry out valve plate maintenance or change, influence production efficiency, many operating modes do not allow equipment to shut down moreover, in case shut down can cause economic loss.

Disclosure of Invention

The invention aims to provide a gate valve which is simple to operate and can realize online replacement of a sealing surface.

In order to solve the technical problem, the invention provides a gate valve, which comprises a valve body, wherein a valve cavity with an opening at the upper end is arranged in the valve body, a first pipeline and a second pipeline which are communicated with the valve cavity are arranged on the side surface of the valve body, and the first pipeline and the second pipeline are coaxially arranged; the valve body is fixedly provided with a valve cover at an opening at the upper end of the valve cavity, the valve cover is internally threaded with a valve rod arranged along the vertical direction, and the lower end of the valve rod is positioned in the valve cavity and is provided with a valve block assembly for controlling the on-off of a first pipeline and a second pipeline; the valve block assembly comprises a cross rod, a first valve block and a second valve block, the cross section of the first valve block and the cross section of the second valve block are square, the cross rod is connected to the inner side wall of the valve cavity in a sliding mode in the vertical direction and is perpendicular to the axis of the first pipeline, a first supporting rod extending in the axial direction of the first pipeline and a second supporting rod extending in the axial direction of the second pipeline are symmetrically arranged on two sides of the cross rod, a first sliding groove is formed in the first supporting rod in the direction perpendicular to the cross rod, a second sliding groove is formed in the second supporting rod in the direction perpendicular to the cross rod, a first T-shaped protruding block connected in the first sliding groove in a sliding mode is arranged at the upper end of the first valve block, and a second T-shaped protruding block connected in the second sliding groove in a sliding; the edges of the first valve block and the second valve block are rotatably connected through a hinge shaft; a limiting sliding groove is formed in the cross rod along the length direction of the cross rod, the upper end of the hinged shaft extends out of the limiting sliding groove, and a conversion component for driving the hinged shaft to move along the limiting sliding groove is arranged in the valve body; the peripheral side surface of the first valve block is provided with a first sealing surface and a second sealing surface which are adjacent, and the peripheral side surface of the second valve block is provided with a third sealing surface and a fourth sealing surface which are adjacent; when the conversion assembly driving hinge shaft is located at one end of the limiting sliding groove, the first sealing surface is located at the working position and is perpendicular to the axis of the first pipeline, the third sealing surface is located at the working position and is perpendicular to the axis of the second pipeline, when the conversion assembly driving hinge shaft is located at the other end of the limiting sliding groove, the second sealing surface is located at the working position and is perpendicular to the axis of the first pipeline, and the fourth sealing surface is located at the working position and is perpendicular to the axis of the second pipeline.

Furthermore, a first convex plate is arranged at one end, close to the cross rod, of the first supporting rod, a second convex plate is arranged at one end, close to the cross rod, of the second supporting rod, a first cutting groove is formed in the first convex plate along the length direction of the cross rod, a second cutting groove is formed in the second convex plate along the length direction of the cross rod, and a convex shoulder located in the first cutting groove and the second cutting groove is arranged at the lower end of the valve rod and extends into the space between the first convex plate and the second convex plate.

Further, the conversion assembly comprises a shaft rod and a sliding plate which is connected between the first convex plate and the second convex plate in a sliding mode along the length direction of the cross rod, and the upper end of the hinge shaft is rotatably connected to the sliding plate; the axostylus axostyle rotates along vertical direction to be connected in the valve rod, the upper end of axostylus axostyle stretches out valve rod and fixed mounting has first hand wheel, the lower extreme of axostylus axostyle stretches out the valve rod and is equipped with the gear of contradicting on the slide, the side of slide be equipped with gear engagement's pinion rack, drive the slide through the meshing of gear and pinion rack when the axostylus axostyle rotates and slide.

Furthermore, positioning components are arranged on the side surfaces, close to the two ends of the limiting sliding chute, of the sliding plate, and the positioning components are used for positioning the hinged shaft when the hinged shaft moves to the end part of the limiting sliding chute; the positioning assembly comprises a positioning block and a positioning spring, a positioning groove is formed in the side face of the sliding plate along the length direction perpendicular to the limiting sliding groove, the positioning block is connected in the positioning groove in a sliding mode, and a positioning protrusion extending into the limiting sliding groove is arranged on the positioning block; the positioning spring is positioned in the positioning groove and arranged between the positioning block and the plug for forcing the positioning bulge to extend into the limiting sliding groove.

Furthermore, a second hand wheel is fixedly mounted at the upper end of the valve rod.

Further, the inside wall of valve pocket is equipped with two sand grips along vertical direction symmetry, all is equipped with the location spout along vertical direction in every sand grip, the both ends of horizontal pole are located two location spouts respectively.

Advantageous effects

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

1. according to the invention, the first valve block and the second valve block which are hinged together are arranged, and the conversion assembly can control the first valve block and the second valve block to rotate relatively, so that the first valve block and the second valve block have two working positions, when the first working position is adopted, the first sealing surface of the first valve block and the third sealing surface of the second valve block respectively form sealing with the first pipeline and the second pipeline, and when the second working position is adopted, the second sealing surface of the first valve block and the fourth sealing surface of the second valve block respectively form sealing with the first pipeline and the second pipeline, therefore, compared with the valve block in the prior art, the double sealing surfaces are added, and the service life can be at least doubled;

2. when the sealing surfaces of the first valve block and the second valve block at a certain working position are damaged, the working positions of the first valve block and the second valve block can be replaced on line without stopping, so that the sealing surfaces of the first valve block and the second valve block are replaced, the continuous work of a pipeline or equipment is ensured, the operation efficiency of a system is improved, and the economic loss caused by stopping and maintaining is reduced.

Drawings

FIG. 1 is a cross-sectional block diagram of the present invention with the first valve block and the second valve block in a first operating position;

FIG. 2 is a sectional view of A-A in FIG. 1;

FIG. 3 is a cross-sectional view of the first and second valve blocks of the present invention as they transition from the first operating position to the second operating position;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a cross-sectional block diagram of the present invention with the first valve block and the second valve block in a second operating position;

FIG. 6 is a sectional view taken along line A-A in FIG. 5;

FIGS. 7-8 are three-dimensional block diagrams of portions of the assembly of the present invention;

fig. 9-10 are three-dimensional structural views of a part of the assembly body of the present invention at the time of switching the operating positions of the first valve block and the second valve block.

Detailed Description

Referring to fig. 1 to 10, the present invention provides a gate valve, including a valve body 1, a valve cavity 101 with an opening at an upper end is arranged in the valve body 1, a first pipeline 11 and a second pipeline 12 communicated with the valve cavity 101 are arranged on a side surface of the valve body 1, and the first pipeline 11 and the second pipeline 12 are coaxially arranged; a valve cover 2 is fixedly installed on an opening at the upper end of the valve cavity 101 of the valve body 1, a valve rod 3 arranged along the vertical direction is connected with the valve cover 2 in an internal thread mode, and a second wheel 30 is fixedly installed at the upper end of the valve rod 3; the lower end of the valve rod 3 is positioned in the valve cavity 101 and is provided with a valve block assembly for controlling the on-off of the first pipeline 11 and the second pipeline 12.

The valve block assembly comprises a cross rod 61, a first valve block 71 and a second valve block 72 with square cross sections, wherein the cross rod 61 is connected on the inner side wall of the valve cavity 101 in a sliding mode in the vertical direction and is perpendicular to the axis of the first pipeline 11; the inner side wall of the valve cavity 101 is symmetrically provided with two convex strips 13 along the vertical direction, each convex strip 13 is internally provided with a positioning sliding groove 131 along the vertical direction, two ends of the cross rod 61 are respectively positioned in the two positioning sliding grooves 131, two sides of the cross rod 61 are symmetrically provided with a first support rod 62a extending along the axial direction of the first pipeline 11 and a second support rod 62b extending along the axial direction of the second pipeline 12, the first support rod 62a is internally provided with a first sliding groove 621 along the direction perpendicular to the cross rod 61, the second support rod 62b is internally provided with a second sliding groove 622 along the direction perpendicular to the cross rod 61, the upper end of the first valve block 71 is provided with a first T-shaped convex block 71a connected in the first sliding groove 621 in a sliding manner, and the upper end of the second valve block 72 is provided with a second T-shaped convex block 72a connected in the second sliding groove 622 in; the edges of the first valve block 71 and the second valve block 72 are rotatably connected through a hinge shaft 8; a limiting sliding groove 611 is formed in the cross rod 61 along the length direction of the cross rod, the upper end of the hinge shaft 8 extends out of the limiting sliding groove 611, and a conversion component for driving the hinge shaft 8 to move along the limiting sliding groove 611 is arranged in the valve body 1; the peripheral side surface of the first valve block 71 is provided with a first sealing surface 711 and a second sealing surface 712 which are adjacent, and the peripheral side surface of the second valve block 72 is provided with a third sealing surface 721 and a fourth sealing surface 722 which are adjacent; when the switching assembly drive hinge shaft 8 is located at one end of the limit slide groove 611, the first sealing surface 711 is in the working position and perpendicular to the axis of the first pipe 11, the third sealing surface 721 is in the working position and perpendicular to the axis of the second pipe 12, when the switching assembly drive hinge shaft 8 is located at the other end of the limit slide groove 611, the second sealing surface 712 is in the working position and perpendicular to the axis of the first pipe 11, and the fourth sealing surface 722 is in the working position and perpendicular to the axis of the second pipe 12.

The first support bar 62a is provided with a first protruding plate 63 at one end close to the cross bar 61, the second support bar 62b is provided with a second protruding plate 64 at one end close to the cross bar 61, a first cut groove 63a is formed in the first protruding plate 63 along the length direction of the cross bar 61, a second cut groove 64a is formed in the second protruding plate 64 along the length direction of the cross bar 61, and the lower end of the valve rod 3 extends between the first protruding plate 63 and the second protruding plate 64 and is provided with a shoulder 31 positioned in the first cut groove 63a and the second cut groove 64 a.

The switching assembly comprises a shaft rod 4 and a sliding plate 5 connected between a first convex plate 63 and a second convex plate 64 in a sliding way along the length direction of the cross rod 61, and the upper end of the hinge shaft 8 is rotatably connected to the sliding plate 5; the utility model discloses a slide plate, including slide 5, axostylus axostyle 4, valve rod 3, gear 41, slide 5, the axostylus axostyle 4 is connected in valve rod 3 along vertical direction rotation, the upper end of axostylus axostyle 4 stretches out valve rod 3 and fixed mounting has first hand wheel 40, the lower extreme of axostylus axostyle 4 stretches out valve rod 3 and is equipped with the gear 41 of contradicting on slide 5, the side of slide 5 is equipped with the pinion rack 51 with gear 41 meshing, drives slide.

Positioning components are arranged on the side surfaces of the sliding plate 5 close to the two ends of the limiting sliding groove 611 and used for positioning the hinge shaft 8 when the hinge shaft 8 moves to the end part of the limiting sliding groove 611; the positioning assembly comprises a positioning block 9 and a positioning spring 91, a positioning groove 52 is formed in the side face of the sliding plate 5 along the length direction perpendicular to the limiting sliding groove 611, the positioning block 9 is connected in the positioning groove 52 in a sliding mode, and a positioning protrusion 92 extending into the limiting sliding groove 611 is formed in the positioning block 9; a plug 93 is fixedly installed at an opening of the positioning groove 52, and the positioning spring 91 is located in the positioning groove 52 and is disposed between the positioning block 9 and the plug 93 for forcing the positioning protrusion 92 to extend into the limiting sliding groove 611.

In this embodiment, the second handwheel 30 rotates the valve rod 3 to drive the first valve block 71 and the second valve block 72 to move up and down, so as to control the on-off of the first pipeline 11 and the second pipeline 12; the shaft lever 4 is rotated through the first hand wheel 40, the gear 41 is driven to rotate, and then the sliding plate 5 and the hinge shaft 8 can be driven to move through the toothed plate 51, so that the first valve block 71 and the second valve block 72 relatively rotate, the working position is changed, when the hinge shaft 8 moves to one end of the limiting sliding groove 611, the positioning protrusion 92 is clamped on the outer side of the hinge shaft 8, at the moment, when the first valve block 71 and the second valve block 72 are in the first working position, a seal is formed between the first sealing surface 711 and the first pipeline 11, and a seal is formed between the third sealing surface 721 and the second pipeline 12; when the hinge shaft 8 moves to the other end of the limiting sliding groove 611, the positioning protrusion 92 is clamped outside the hinge shaft 8, and at this time, when the first valve block 71 and the second valve block 72 are in the second working position, the second sealing surface 712 forms a seal with the first pipeline 11, and the fourth sealing surface 722 forms a seal with the second pipeline 12.

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 gate valve is characterized by comprising a valve body, wherein a valve cavity with an opening at the upper end is arranged in the valve body, a first pipeline and a second pipeline which are communicated with the valve cavity are arranged on the side surface of the valve body, and the first pipeline and the second pipeline are coaxially arranged; the valve body is fixedly provided with a valve cover at an opening at the upper end of the valve cavity, the valve cover is internally threaded with a valve rod arranged along the vertical direction, and the lower end of the valve rod is positioned in the valve cavity and is provided with a valve block assembly for controlling the on-off of a first pipeline and a second pipeline; the valve block assembly comprises a cross rod, a first valve block and a second valve block, the cross section of the first valve block and the cross section of the second valve block are square, the cross rod is connected to the inner side wall of the valve cavity in a sliding mode in the vertical direction and is perpendicular to the axis of the first pipeline, a first supporting rod extending in the axial direction of the first pipeline and a second supporting rod extending in the axial direction of the second pipeline are symmetrically arranged on two sides of the cross rod, a first sliding groove is formed in the first supporting rod in the direction perpendicular to the cross rod, a second sliding groove is formed in the second supporting rod in the direction perpendicular to the cross rod, a first T-shaped protruding block connected in the first sliding groove in a sliding mode is arranged at the upper end of the first valve block, and a second T-shaped protruding block connected in the second sliding groove in a sliding; the edges of the first valve block and the second valve block are rotatably connected through a hinge shaft; a limiting sliding groove is formed in the cross rod along the length direction of the cross rod, the upper end of the hinged shaft extends out of the limiting sliding groove, and a conversion component for driving the hinged shaft to move along the limiting sliding groove is arranged in the valve body; the peripheral side surface of the first valve block is provided with a first sealing surface and a second sealing surface which are adjacent, and the peripheral side surface of the second valve block is provided with a third sealing surface and a fourth sealing surface which are adjacent; when the conversion assembly driving hinge shaft is located at one end of the limiting sliding groove, the first sealing surface is located at the working position and is perpendicular to the axis of the first pipeline, the third sealing surface is located at the working position and is perpendicular to the axis of the second pipeline, when the conversion assembly driving hinge shaft is located at the other end of the limiting sliding groove, the second sealing surface is located at the working position and is perpendicular to the axis of the first pipeline, and the fourth sealing surface is located at the working position and is perpendicular to the axis of the second pipeline.

2. The gate valve of claim 1, wherein: the valve rod comprises a first support rod, a second support rod and a valve rod, wherein the first support rod is provided with a first convex plate at one end close to a cross rod, the second support rod is provided with a second convex plate at one end close to the cross rod, a first cutting groove is formed in the first convex plate along the length direction of the cross rod, a second cutting groove is formed in the second convex plate along the length direction of the cross rod, and the lower end of the valve rod extends into a position between the first convex plate and the second convex plate and is provided with a convex shoulder located in the first cutting groove and the second cutting groove.

3. The gate valve of claim 2, wherein: the conversion assembly comprises a shaft lever and a sliding plate which is connected between the first convex plate and the second convex plate in a sliding manner along the length direction of the cross bar, and the upper end of the articulated shaft is rotatably connected to the sliding plate; the axostylus axostyle rotates along vertical direction to be connected in the valve rod, the upper end of axostylus axostyle stretches out valve rod and fixed mounting has first hand wheel, the lower extreme of axostylus axostyle stretches out the valve rod and is equipped with the gear of contradicting on the slide, the side of slide be equipped with gear engagement's pinion rack, drive the slide through the meshing of gear and pinion rack when the axostylus axostyle rotates and slide.

4. The gate valve of claim 2, wherein: positioning components are arranged on the side surfaces, close to the two ends of the limiting sliding groove, in the sliding plate, and the positioning components are used for positioning the hinged shaft when the hinged shaft moves to the end part of the limiting sliding groove; the positioning assembly comprises a positioning block and a positioning spring, a positioning groove is formed in the side face of the sliding plate along the length direction perpendicular to the limiting sliding groove, the positioning block is connected in the positioning groove in a sliding mode, and a positioning protrusion extending into the limiting sliding groove is arranged on the positioning block; the positioning spring is positioned in the positioning groove and arranged between the positioning block and the plug for forcing the positioning bulge to extend into the limiting sliding groove.

5. The gate valve of claim 1, wherein: and a second hand wheel is fixedly mounted at the upper end of the valve rod.

6. The gate valve of claim 1, wherein: the inside wall of valve pocket is equipped with two sand grips along vertical direction symmetry, all is equipped with the location spout along vertical direction in every sand grip, the both ends of horizontal pole are located two location spouts respectively.