CN111219494A

CN111219494A - Stop valve

Info

Publication number: CN111219494A
Application number: CN202010078056.4A
Authority: CN
Inventors: 陈艳艳; 张庆宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-02
Filing date: 2020-02-02
Publication date: 2020-06-02

Abstract

The invention discloses a stop valve which comprises a valve body, wherein an upper valve cavity and a lower valve cavity are arranged in the valve body; the side surface of the valve body is provided with a port B communicated with the upper valve cavity and a port A communicated with the lower valve cavity; the valve body is fixedly provided with an upper end cover at an upper end opening of the upper valve cavity and a lower end cover at a lower end opening of the lower valve cavity; a valve sleeve is rotatably connected in the upper valve cavity, and an adjusting hole matched with the port B is formed in the side wall of the valve sleeve; the upper end cover is rotatably connected with an adjusting rod, and the lower end of the adjusting rod extends into the upper valve cavity and is provided with an end plate fixedly connected with the valve sleeve; a screw rod is connected in the adjusting rod along the axial thread of the valve sleeve, and a valve disc for controlling the on-off of the valve hole is arranged at the lower end of the screw rod; a positioning assembly is arranged in the valve body and used for positioning the valve sleeve; the stop valve is simple in structure and capable of controlling flow.

Description

Stop valve

Technical Field

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

Background

The stop valve is an industrial valve with a valve core moving linearly along the central line of a valve core sealing hole to stop a valve port. The stop valve is widely applied to industrial equipment, can generally be used together with a flow valve and a backflow preventing valve during use, and has the defects that the traditional stop valve only has a cutting-off function and cannot meet the requirements of the current actual working conditions due to the fact that the valves are various and large in installation space is required.

Disclosure of Invention

The invention aims to provide a stop valve which is simple in structure and can control flow.

In order to achieve the purpose, the invention provides the following technical scheme: a stop valve comprises a valve body, wherein an upper valve cavity and a lower valve cavity are arranged in the valve body, and a valve hole for communicating the upper valve cavity and the lower valve cavity is arranged in the valve body; the side surface of the valve body is provided with a port B communicated with the upper valve cavity and a port A communicated with the lower valve cavity; the valve body is fixedly provided with an upper end cover at an upper end opening of the upper valve cavity and a lower end cover at a lower end opening of the lower valve cavity; a valve sleeve is rotatably connected in the upper valve cavity, and an adjusting hole matched with the port B is formed in the side wall of the valve sleeve; the upper end cover is rotatably connected with an adjusting rod, and the lower end of the adjusting rod extends into the upper valve cavity and is provided with an end plate fixedly connected with the valve sleeve; a screw rod is connected in the adjusting rod along the axial thread of the valve sleeve, and a valve disc for controlling the on-off of the valve hole is arranged at the lower end of the screw rod; and a positioning assembly is arranged in the valve body and is used for realizing the positioning of the valve sleeve.

Through the technical scheme, when the stop valve is used, the adjusting rod drives the valve sleeve positioned in the upper valve cavity to rotate, the size of the overlapping of the adjusting hole and the port B is controlled, the flow of the stop valve is adjusted, and the valve sleeve is positioned through the positioning assembly; when the adjusting hole is completely overlapped with the port B, the flow of the stop valve is maximum, and when the adjusting hole is completely staggered with the port B, the stop valve is disconnected; in addition, the valve disc is controlled to be separated from or pressed on the valve hole by rotating the screw rod, so that the stop valve is opened or closed; the stop valve is simple in structure and capable of controlling flow.

In a further technical scheme, the positioning assembly comprises a positioning ball and a positioning spring, a positioning groove is formed in the inner side wall of the upper valve cavity along the radial direction of the valve sleeve, the positioning ball is located in the positioning groove, and the positioning spring is arranged in the positioning groove and used for forcing the positioning ball to press the outer circumferential side wall of the valve sleeve; the side wall of the outer circumference of the valve sleeve is uniformly provided with a plurality of positioning holes matched with the positioning balls at intervals along the circumference in the opposite direction.

Through the technical scheme, when the positioning ball is positioned in the positioning hole, the valve sleeve is positioned, when the positioning ball is positioned in different positioning holes, the valve sleeve is positioned at different positions, and then the positioning of different overlapping sizes of the adjusting hole and the port B is realized; when the valve sleeve is rotated by force, the positioning ball is pushed to compress the positioning spring, so that the valve sleeve can rotate.

In a further technical scheme, a rotating shaft is rotatably connected between the lower end cover and the top of the lower valve cavity in the lower valve cavity, and the rotating shaft and the lower valve cavity are coaxially arranged; the lower end cover is provided with a first baffle plate and a second baffle plate which extend upwards along the vertical direction on the surface facing the lower valve cavity, and the upper ends of the first baffle plate and the second baffle plate are hermetically connected with the top of the lower valve cavity; the first baffle and the second baffle are in sealing connection with the inner circumferential side wall of the lower valve cavity at the side far away from the rotating shaft and are in sliding sealing connection with the rotating shaft at the side close to the rotating shaft; the first baffle and the second baffle divide the lower valve cavity into a first sealed cavity and a second cavity communicated with the port A, a power plate extending into the first sealed cavity is arranged on the circumferential side surface of the rotating shaft, the power plate divides the first sealed cavity into a third cavity and a fourth cavity, the third cavity is communicated with the second cavity, and the fourth cavity is communicated with the port B; the circumference side of pivot near its upper end is equipped with the separation blade that is used for controlling the break-make of valve opening, and when the power board pressed close to first baffle, the separation blade was closed the valve opening, and when the power board pasted tight second baffle, the separation blade was opened the valve opening completely.

According to the technical scheme, when the stop valve is used, the liquid enters the port A, the liquid exits the port B, the pressure of the port A is larger than that of the port B, pressure liquid enters the third cavity through the second cavity and pushes the power plate to rotate towards the second baffle plate, liquid in the fourth cavity flows towards the port B, the power plate drives the baffle plate to open the valve hole when rotating towards the second baffle plate, and when the power plate is tightly attached to the second baffle plate, the baffle plate completely opens the valve hole; when the liquid in the port B flows backwards to the port A or the stop valve is reversely mounted, the pressure of the port B is greater than that of the port A, the pressure liquid enters the fourth cavity and pushes the power plate to move towards the first baffle plate, the liquid in the third cavity flows towards the port A through the second cavity, when the power plate moves towards the first baffle plate, the stop plate is driven to close the valve hole, and when the power plate is close to the first baffle plate, the stop plate completely closes the valve hole; thereby preventing the backflow of the stop valve.

In a further technical scheme, a first through hole used for communicating the third chamber with the second chamber is formed in the rotating shaft, and a second through hole used for communicating the fourth chamber with the port B is formed in the rotating shaft, the lower end cover and the valve body.

In a further technical scheme, a handle is arranged on the outer circumferential side face of the adjusting rod close to the upper end, and the handle is perpendicular to the adjusting rod.

In a further technical scheme, a hand wheel is fixedly mounted at the upper end of the screw rod.

Advantageous effects

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

(1) when the stop valve is used, the valve sleeve positioned in the upper valve cavity is driven to rotate through the adjusting rod, the size of the overlapping of the adjusting hole and the port B is controlled, and the flow of the stop valve is further adjusted;

(2) when the liquid in the port B flows backwards to the port A or the stop valve is reversely mounted, the pressure of the port B is greater than that of the port A, the pressure liquid enters the fourth cavity and pushes the power plate to move towards the first baffle plate, the liquid in the third cavity flows towards the port A through the second cavity, when the power plate moves towards the first baffle plate, the stop plate is driven to close the valve hole, and when the power plate is close to the first baffle plate, the stop plate completely closes the valve hole; thereby preventing the backflow of the stop valve;

(3) the stop valve is highly integrated as a whole, has small volume and multiple functions.

Drawings

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

FIG. 2 is a cross-sectional view taken along the line C-C in FIG. 1;

FIG. 3 is a cross-sectional view taken along line D-D of FIG. 1;

FIG. 4 is a partial block diagram of FIG. 3;

fig. 5 is an assembly structure view of the lower end cap and the rotating shaft of the present invention.

Detailed Description

Referring to fig. 1-5, a stop valve includes a valve body 1, an upper valve chamber 101 and a lower valve chamber 102 are provided in the valve body 1, and a valve hole 1d for communicating the upper valve chamber 101 and the lower valve chamber 102 is provided in the valve body 1; the side surface of the valve body 1 is provided with a port B communicated with the upper valve cavity 101 and a port A communicated with the lower valve cavity 102; the valve body 1 is fixedly provided with an upper end cover 71 at an upper end opening of an upper valve cavity 101, and is fixedly provided with a lower end cover 7 at a lower end opening of a lower valve cavity 102; the upper valve cavity 101 is rotatably connected with a valve sleeve 2, and the side wall of the valve sleeve 2 is provided with an adjusting hole 2a matched with the port B; the upper end cover 71 is rotatably connected with an adjusting rod 8a, the lower end of the adjusting rod 8a extends into the upper valve cavity 101 and is provided with an end plate 8b fixedly connected with the valve housing 2, the adjusting rod 8a is provided with a handle 8 on the outer circumferential side surface close to the upper end, and the handle 8 is perpendicular to the adjusting rod 8 a; a screw rod 3a is connected in the adjusting rod 8a along the axial direction of the valve sleeve 2 in a threaded manner, a valve disc 3 for controlling the on-off of the valve hole 1d is arranged at the lower end of the screw rod 3a, and a hand wheel 9 is fixedly arranged at the upper end of the screw rod 3 a; and a positioning assembly is arranged in the valve body 1 and is used for positioning the valve sleeve 2.

The positioning assembly comprises a positioning ball 10 and a positioning spring 11, a positioning groove 104 is arranged on the inner side wall of the upper valve cavity 101 along the radial direction of the valve sleeve 2, the positioning ball 10 is positioned in the positioning groove 104, and the positioning spring 11 is arranged in the positioning groove 104 and used for forcing the positioning ball 10 to press the outer circumferential side wall of the valve sleeve 2; five positioning holes 2c matched with the positioning balls 10 are uniformly arranged on the side wall of the outer circumference of the valve sleeve 2 along the circumference of the valve sleeve at intervals in the opposite direction.

A rotating shaft 5 is rotatably connected between the lower end cover 7 and the top of the lower valve cavity 102 in the lower valve cavity 102, and the rotating shaft 5 and the lower valve cavity 102 are coaxially arranged; the lower end cover 7 is provided with a first baffle plate 7c and a second baffle plate 7b which extend upwards along the vertical direction on the surface facing the lower valve cavity 102, and the upper ends of the first baffle plate 7c and the second baffle plate 7b are hermetically connected with the top of the lower valve cavity 102; the first baffle 7c and the second baffle 7b are in sealing connection with the inner circumferential side wall of the lower valve cavity 102 at the side far away from the rotating shaft 5 and are in sliding sealing connection with the rotating shaft 5 at the side close to the rotating shaft 5; the first baffle 7c and the second baffle 7B divide the lower valve cavity 102 into a first sealed chamber 102a and a second chamber 1c communicated with the port A, a power plate 6 extending into the first sealed chamber 102a is arranged on the circumferential side surface of the rotating shaft 5, the power plate 6 divides the first sealed chamber 102a into a third chamber 1e and a fourth chamber 1f, a first through hole 5c used for communicating the third chamber 1e with the second chamber 1c is arranged in the rotating shaft 5, and second through

holes

5B, 5a, 7a and 1B used for communicating the fourth chamber 1f with the port B are arranged in the rotating shaft 5, the lower end cover 7 and the valve body 1; the circumference side of pivot 5 near its upper end is equipped with the separation blade 4 that is used for controlling the break-make of valve opening 1d, and when power board 6 closed close to first baffle 7c, separation blade 4 closed valve opening 1d, and when power board 6 closed second baffle 7b, separation blade 4 opened valve opening 1d completely.

As shown in figure 1, the stop valve is a simple structure, when in use, an A port is connected with a liquid inlet pipe, and a B port is connected with a liquid outlet pipe; the pressure of A mouth is greater than the pressure of B mouth, pressure liquid passes through A mouth, second cavity 1c, first through-hole 5c gets into in the third cavity 1e, promote power board 6 to the motion of second baffle 7B direction, the liquid in the fourth cavity 1f passes through second through-

hole

5B, 5a, 7a, 1B flow direction B mouth, when power board 6 moves to second baffle 7B direction, drive separation blade 4 through pivot 5 and open the lower extreme of valve opening 1d gradually, when power board 6 pastes tight second baffle 7B, separation blade 4 opens the lower extreme of valve opening 1d completely. In addition, the positioning ball 10 is pressed tightly in the positioning hole 2c under the action of the positioning spring 11 to realize the positioning of the valve sleeve 2, at the moment, the hand wheel 99 is rotated to drive the screw rod 3a to rotate, the valve disc 3 is driven to move up and down under the action of the thread of the adjusting rod 8a, and when the valve disc 3 is pressed tightly at the upper end of the valve hole 1d, the stop valve is closed to finish the stop; when the valve disc 3 leaves the upper end of the valve hole 1d, the stop valve is opened, and liquid flows to the liquid outlet pipe through the port A, the second cavity 1c, the valve hole 1d, the valve sleeve 2 and the adjusting holes 2a and B. Therefore, the stop and through-flow functions of the stop valve can be completed.

When the stop valve needs to control the flow of the overflowing medium, firstly, the hand wheel 9 needs to be rotated to lift the valve disc 3, the upper end of the valve hole 1d is opened, the rotating adjusting rod 8a drives the valve sleeve 2 to rotate, the positioning spring 11 is overcome when the valve sleeve 2 rotates, the positioning ball 10 is extruded out of the positioning hole 2c, the positioning ball 10 can be controlled in different positioning holes 2c through controlling the rotating angle of the adjusting rod 8a, so that the size of the overlapping area between the adjusting hole 2a and the port B can be controlled, the size of the flow of the medium flowing through the stop valve can be further controlled, and the flow control of the overflowing medium can be.

In addition, when the baffle 4 opens the lower end of the valve hole 1d, the pressure at the port A is greater than the pressure at the port B due to the pressure difference between the port A and the port B, so that the pressure in the third chamber 1e is always greater than the pressure in the fourth chamber 1f, and the baffle 4 is always in a state of opening the valve hole 1 d; when fluid medium enters from the port B of the stop valve, pressure fluid enters the fourth cavity 1f through the second through

holes

5B, 5a, 7a and 1B, simultaneously, the medium in the first cavity enters the second cavity 1c through the first through hole 5c and is discharged from the port A, the fluid medium pushes the power plate 6 to drive the rotating shaft 5 to rotate and drive the baffle plate 4 to rotate, the lower end of the valve hole 1d is closed, and therefore the fluid medium cannot flow to the port A from the port B, and the backflow prevention function is achieved.

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 is characterized by comprising a valve body, wherein an upper valve cavity and a lower valve cavity are arranged in the valve body, and a valve hole for communicating the upper valve cavity with the lower valve cavity is arranged in the valve body; the side surface of the valve body is provided with a port B communicated with the upper valve cavity and a port A communicated with the lower valve cavity; the valve body is fixedly provided with an upper end cover at an upper end opening of the upper valve cavity and a lower end cover at a lower end opening of the lower valve cavity; a valve sleeve is rotatably connected in the upper valve cavity, and an adjusting hole matched with the port B is formed in the side wall of the valve sleeve; the upper end cover is rotatably connected with an adjusting rod, and the lower end of the adjusting rod extends into the upper valve cavity and is provided with an end plate fixedly connected with the valve sleeve; a screw rod is connected in the adjusting rod along the axial thread of the valve sleeve, and a valve disc for controlling the on-off of the valve hole is arranged at the lower end of the screw rod; and a positioning assembly is arranged in the valve body and is used for realizing the positioning of the valve sleeve.

2. The stop valve of claim 1, wherein the positioning assembly comprises a positioning ball and a positioning spring, the inner side wall of the upper valve chamber is provided with a positioning groove along the radial direction of the valve housing, the positioning ball is positioned in the positioning groove, and the positioning spring is arranged in the positioning groove and used for forcing the positioning ball to press against the outer circumferential side wall of the valve housing; the side wall of the outer circumference of the valve sleeve is uniformly provided with a plurality of positioning holes matched with the positioning balls at intervals along the circumference in the opposite direction.

3. The stop valve of claim 1, wherein a rotating shaft is rotatably connected in the lower valve chamber between the lower end cover and the top of the lower valve chamber, and the rotating shaft and the lower valve chamber are coaxially arranged; the lower end cover is provided with a first baffle plate and a second baffle plate which extend upwards along the vertical direction on the surface facing the lower valve cavity, and the upper ends of the first baffle plate and the second baffle plate are hermetically connected with the top of the lower valve cavity; the first baffle and the second baffle are in sealing connection with the inner circumferential side wall of the lower valve cavity at the side far away from the rotating shaft and are in sliding sealing connection with the rotating shaft at the side close to the rotating shaft; the first baffle and the second baffle divide the lower valve cavity into a first sealed cavity and a second cavity communicated with the port A, a power plate extending into the first sealed cavity is arranged on the circumferential side surface of the rotating shaft, the power plate divides the first sealed cavity into a third cavity and a fourth cavity, the third cavity is communicated with the second cavity, and the fourth cavity is communicated with the port B; the circumference side of pivot near its upper end is equipped with the separation blade that is used for controlling the break-make of valve opening, and when the power board pressed close to first baffle, the separation blade was closed the valve opening, and when the power board pasted tight second baffle, the separation blade was opened the valve opening completely.

4. The stop valve of claim 3, wherein a first through hole for communicating the third chamber with the second chamber is formed in the rotating shaft, and a second through hole for communicating the fourth chamber with the port B is formed in the rotating shaft, the lower end cover and the valve body.

5. The shut-off valve of claim 1, wherein the adjustment lever is provided with a handle on the outer circumferential side near the upper end, the handle being perpendicular to the adjustment lever.

6. The stop valve of claim 1, wherein a hand wheel is fixedly mounted on an upper end of the screw.