CN112283369A

CN112283369A - Stop valve

Info

Publication number: CN112283369A
Application number: CN202011276496.7A
Authority: CN
Inventors: 胡现磊; 魏绪翠; 汤杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-01-29

Abstract

The invention discloses a stop valve, which comprises a valve body, wherein a valve cavity with an opening at the upper end is arranged in the valve body, a transverse plate is arranged in the valve cavity, the transverse plate divides the valve cavity into an upper valve cavity and a lower valve cavity, a valve port for communicating the upper valve cavity and the lower valve cavity is arranged in the transverse plate, an inlet pipe communicated with the lower valve cavity and an outlet pipe communicated with the upper valve cavity are arranged on the side surface of the valve body; 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 provided with a valve rod moving along the vertical direction, the lower end of the valve rod is provided with a valve frame, a valve clack used for controlling the opening and closing of the valve port is arranged in the valve frame, and a first sealing surface and a second sealing surface are symmetrically arranged on the valve clack; a switching assembly for controlling the valve clack to turn over between the first sealing surface and the second sealing surface is arranged in the valve frame; the stop valve is simple in structure and convenient for replacing the sealing surface.

Description

Stop valve

Technical Field

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

Background

The stop valve is widely applied to a fluid conveying system as a control part in the field of pressure pipelines, plays a role in changing the section of a passage and the flowing direction of fluid, has the functions of diversion, stopping, throttling, non-return, flow splitting or overflow pressure relief and the like, and is an irreplaceable actuator. The valve core of the existing stop valve is easy to be damaged due to long-time medium scouring in the use process; when the valve core damages and causes the leakage, need stop whole pipeline or equipment, pull down the stop valve and maintain or change, influence production efficiency, moreover, many operating modes do not allow equipment to shut down, in case shut down can cause great economic loss.

Disclosure of Invention

The invention aims to provide a stop valve which is simple in structure and can facilitate replacement of a sealing surface.

In order to solve the technical problems, the invention provides the following technical scheme: a stop valve comprises a valve body, wherein a valve cavity with an opening at the upper end is arranged in the valve body, a transverse plate is arranged in the valve cavity and divides the valve cavity into an upper valve cavity and a lower valve cavity, valve ports for communicating the upper valve cavity and the lower valve cavity are arranged in the transverse plate, and an inlet pipe and an outlet pipe are arranged on the side surface of the valve body, wherein the inlet pipe is communicated with the lower valve cavity; 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 provided with a valve rod moving along the vertical direction, the lower end of the valve rod is provided with a valve frame, a valve clack used for controlling the opening and closing of the valve port is arranged in the valve frame, and a first sealing surface and a second sealing surface are symmetrically arranged on the valve clack; and a switching assembly for controlling the valve clack to turn over between the first sealing surface and the second sealing surface is arranged in the valve frame.

Further, the valve gap internal rotation is connected with the transmission piece, be equipped with the screw hole in the transmission piece, valve rod threaded connection be in the screw hole, the side of valve frame is equipped with the flange, the valve gap internal fixation is equipped with downwardly extending and sliding connection's the slide bar of leading in the flange, drives the valve rod and moves along vertical direction when the transmission piece rotates.

Furthermore, a first hand wheel is fixedly mounted on the outer side of the transmission block.

Furthermore, the switching assembly comprises a connecting rod and a shaft rod which is rotatably connected in the valve rod, and the lower end of the shaft rod extends into the valve frame and is fixedly provided with a first bevel gear; the front side and the rear side of the valve frame are both provided with a convex block, a first rotating shaft is rotatably connected between the two convex blocks, the first rotating shaft is mutually vertical to the shaft lever, and a second bevel gear meshed with the first bevel gear is fixedly arranged on the first rotating shaft; driven chain wheels are symmetrically and rotatably connected to the left side and the right side of the first rotating shaft on the front side of the valve frame, a driving chain wheel is fixedly mounted on the front side of the first rotating shaft, and a transmission chain is arranged between the driving chain wheel and the two driven chain wheels; the front inner side wall and the rear inner side wall of the valve frame are respectively provided with a sliding chute along the left-right direction, each sliding chute is internally connected with a sliding block in a sliding way, the front side and the rear side of the valve clack are respectively provided with a convex shaft which is rotatably connected in the sliding blocks at positions close to the left end, wherein the convex shaft positioned at the front side of the valve frame is fixedly provided with a power chain wheel which is meshed with a transmission chain, and the sliding blocks are driven by the power chain wheel to slide left and right when; one end of the connecting rod is hinged on the front side surface of the valve frame close to the right end, and the other end of the connecting rod is hinged in the middle of the front side surface of the valve clack; when the sliding block is positioned at the left end of the sliding groove, the first sealing surface of the valve clack is positioned at the working position, and when the sliding block is positioned at the right end of the sliding groove, the second sealing surface of the valve clack is positioned at the working position.

Furthermore, the upper end of the shaft rod extends out of the valve rod and is fixedly provided with an adjusting knob.

Furthermore, a first pin hole is formed in the outer side, close to the upper end, of the valve rod in the radial direction, a second pin hole is formed in the side wall of the valve rod, when the first sealing surface or the second sealing surface is located at the working position, the first pin hole and the second pin hole are located at the same axial position, and positioning pins are inserted into the first pin hole and the second pin hole.

Furthermore, the valve clack is provided with a first sealing gasket at the first sealing surface and a second sealing gasket at the second sealing surface.

Advantageous effects

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

according to the invention, the first sealing surface and the second sealing surface are arranged on the valve clack, and different sealing surfaces can be selected to be in working positions through rotation, so that when the sealing surface in the working position is damaged to cause leakage, the sealing surface can be replaced through rotation to enable a new sealing surface to be in the working position.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a partial cross-sectional view of the interior of the shut-off valve in the shut-off state of the present invention;

FIG. 3 is a partial cross-sectional view of the interior of the shut-off valve during switching of the valve flap of the present invention;

FIG. 4 is a partial cross-sectional view of the interior of the stop valve after the valve flap has been switched in accordance with the present invention;

FIGS. 5-6 are block diagrams of the valve frame and switching assembly of the present invention;

fig. 7 is a structural diagram of the valve flap during switching.

Detailed Description

Referring to fig. 1-7, the invention provides a stop valve, which comprises a valve body 1, wherein a valve cavity with an open upper end is arranged in the valve body 1, a transverse plate 101 is arranged in the valve cavity, the valve cavity is divided into an upper valve cavity and a lower valve cavity by the transverse plate 101, a valve port 1a for communicating the upper valve cavity and the lower valve cavity is arranged in the transverse plate 101, and an inlet pipe 102 communicated with the lower valve cavity and an outlet pipe 103 communicated with the upper valve cavity are arranged on the side surface of the valve body 1; the valve body 1 is fixedly provided with a valve cover 2 at an opening at the upper end of the valve cavity, the valve cover 2 is provided with a valve rod 8 moving along the vertical direction, the lower end of the valve rod 8 is provided with a valve frame 5, a valve clack 3 used for controlling the opening and closing of a valve port 1a is arranged in the valve frame 5, the valve clack 3 is symmetrically provided with a first sealing surface 301 and a second sealing surface 302, the valve clack 3 is provided with a first sealing gasket 311 at the first sealing surface 301, and a second sealing gasket 312 at the second sealing surface 302; a switching assembly for controlling the flap 3 to turn between the first sealing surface 301 and the second sealing surface 302 is arranged in the valve frame 5.

2 internal rotations of valve gap are connected with transmission block 10a, be equipped with the screw hole in the

transmission block

10a, 8 threaded connection of valve rod are in the screw hole, the side of valve frame 5 is equipped with

flange

5b, 2 internal fixations of valve gap are equipped with downwardly extending and sliding rod 7 is led in flange 5b to sliding connection, drive valve rod 8 when transmission block 10a rotates and follow vertical direction motion. A first hand wheel 10 is fixedly mounted on the outer side of the transmission block 10 a.

The switching assembly comprises a connecting rod 17 and a shaft rod 9 which is rotatably connected in the valve rod 8, and the lower end of the shaft rod 9 extends into the valve frame 5 and is fixedly provided with a first bevel gear 6; the front side and the rear side of the valve frame 5 are both provided with a convex block 51, a first rotating shaft 52 is rotatably connected between the two convex blocks 51, the first rotating shaft 52 is perpendicular to the shaft rod 9, and a second bevel gear 14 meshed with the first bevel gear 6 is fixedly mounted on the first rotating shaft 52; driven sprockets 13b are symmetrically and rotatably connected to the left side and the right side of a first rotating shaft 52 on the front side of the valve frame 5, a driving sprocket 13a is fixedly mounted on the front side of the first rotating shaft 52, and a transmission chain 16 is arranged between the driving sprocket 13a and the two driven sprockets 13 b; sliding grooves 5a are formed in the front inner side wall and the rear inner side wall of the valve frame 5 in the left-right direction, a sliding block 4 is connected in each sliding groove 5a in a sliding mode, protruding shafts 31 which are connected in the sliding blocks 4 in a rotating mode are arranged at positions, close to the left ends, of the front side and the rear side of the valve clack 3, power chain wheels 15 meshed with transmission chains 16 are fixedly installed on the protruding shafts 31 located on the front side of the valve frame 5, and the transmission chains 16 drive the sliding blocks 4 to slide left and right through the power chain wheels 15 when moving; one end of the connecting rod 17 is hinged on the front side surface of the valve frame 5 close to the right end, and the other end is hinged in the middle of the front side surface of the valve clack 3; when the slider 4 is at the left end of the sliding slot 5a, the first sealing surface 301 of the valve flap 3 is in the operating position, and when the slider 4 is at the right end of the sliding slot 5a, the second sealing surface 302 of the valve flap 3 is in the operating position. The upper end of the shaft rod 9 extends out of the valve rod 8 and is fixedly provided with an adjusting knob 12. The outer side of the valve rod 8 close to the upper end is provided with a first pin hole 81 along the radial direction, the side wall of the shaft rod 9 is provided with a second pin hole 91, when the first sealing surface 301 or the second sealing surface 302 is in the working position, the first pin hole 81 and the second pin hole 91 are in the coaxial position, and a positioning pin 11 is inserted into the first pin hole 81 and the second pin hole 91.

As shown in fig. 1, which is a cross-sectional view of the cut-off valve of the present invention, when the first hand wheel 10 is rotated, due to the sliding fit between the sliding rod 7 and the convex plate 5b and the threaded fit between the threaded hole in the transmission block 10a and the valve rod 8, the first hand wheel will raise or lower the valve rod 8 when rotated, and the valve rod 8 will drive the valve flap 3 to open or close the valve port 1a, thereby realizing the opening and the cutting-off of the cut-off valve.

When the sealing surface needs to be replaced, firstly, the first hand wheel 10 is rotated to lift the valve rod 8, so that the stop valve is stopped at an open state, the positioning pin 11 is taken out from the first pin hole 81 and the second pin hole 91, the adjusting knob 12 is rotated, the first bevel gear 6 is driven to rotate through the shaft rod 9, because the first bevel gear 6 is meshed with the second bevel gear 14, because the second bevel gear 14 and the driving sprocket 13a are both fixed on the first rotating shaft 52, the driving sprocket 13a and the two driven sprockets 13b are matched through the transmission chain 16, the power sprocket 15 is matched with the transmission chain 16, the adjusting knob 12 is rotated to drive the transmission chain 16 to pull the power sprocket 15, because the sliding block 4 is in sliding fit in the sliding groove 5a, the connecting rod 17 is hinged with the valve flap 3, so that the power sprocket 15 is driven to slide rightwards to drive the valve flap 3 to turn over until the position shown in fig. 4, and finishing the work.

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 a valve cavity with an opening at the upper end is arranged in the valve body, a transverse plate is arranged in the valve cavity and divides the valve cavity into an upper valve cavity and a lower valve cavity, valve ports for communicating the upper valve cavity and the lower valve cavity are arranged in the transverse plate, and an inlet pipe and an outlet pipe are arranged on the side surface of the valve body, wherein the inlet pipe is communicated with the lower valve cavity; the valve body is fixedly provided with a valve cover at an opening at the upper end of the valve cavity, and the valve cover is provided with a valve rod moving along the vertical direction; and a switching assembly for controlling the valve clack to turn over between the first sealing surface and the second sealing surface is arranged in the valve frame.

2. The stop valve of claim 1, wherein a transmission block is rotatably connected in the valve cover, a threaded hole is formed in the transmission block, the valve rod is screwed in the threaded hole, a convex plate is arranged on the side surface of the valve frame, a guide slide rod which extends downwards and is slidably connected in the convex plate is fixedly arranged in the valve cover, and the drive rod is driven to move in the vertical direction when the transmission block rotates.

3. The stop valve of claim 2, wherein a first hand wheel is fixedly mounted on the outer side of the transmission block.

4. The shutoff valve of claim 1 wherein said switching assembly includes a connecting rod and a shaft rotatably connected within said valve stem, said shaft having a lower end extending into said valve housing and fixedly mounted with a first bevel gear; the front side and the rear side of the valve frame are both provided with a convex block, a first rotating shaft is rotatably connected between the two convex blocks, the first rotating shaft is mutually vertical to the shaft lever, and a second bevel gear meshed with the first bevel gear is fixedly arranged on the first rotating shaft; driven chain wheels are symmetrically and rotatably connected to the left side and the right side of the first rotating shaft on the front side of the valve frame, a driving chain wheel is fixedly mounted on the front side of the first rotating shaft, and a transmission chain is arranged between the driving chain wheel and the two driven chain wheels; the front inner side wall and the rear inner side wall of the valve frame are respectively provided with a sliding chute along the left-right direction, each sliding chute is internally connected with a sliding block in a sliding way, the front side and the rear side of the valve clack are respectively provided with a convex shaft which is rotatably connected in the sliding blocks at positions close to the left end, wherein the convex shaft positioned at the front side of the valve frame is fixedly provided with a power chain wheel which is meshed with a transmission chain, and the sliding blocks are driven by the power chain wheel to slide left and right when; one end of the connecting rod is hinged on the front side surface of the valve frame close to the right end, and the other end of the connecting rod is hinged in the middle of the front side surface of the valve clack; when the sliding block is positioned at the left end of the sliding groove, the first sealing surface of the valve clack is positioned at the working position, and when the sliding block is positioned at the right end of the sliding groove, the second sealing surface of the valve clack is positioned at the working position.

5. A stop valve as claimed in claim 4, wherein the upper end of the shaft extends beyond the valve stem and is fixedly mounted with an adjustment knob.

6. A stop valve as claimed in claim 4, wherein the valve stem is provided with a first pin hole radially outwardly adjacent the upper end thereof, the side wall of the stem is provided with a second pin hole, the first and second pin holes are coaxially aligned when the first or second sealing surface is in the operative position, and a locating pin is inserted into the first and second pin holes.

7. A stop valve as claimed in claim 1, wherein the flap is provided with a first gasket at the first sealing surface and a second gasket at the second sealing surface.