CN112503048A

CN112503048A - Stop valve

Info

Publication number: CN112503048A
Application number: CN202011478491.2A
Authority: CN
Inventors: 郭国庆; 张继勋; 高济明; 王光炜; 张庆; 陈孝波; 李泽明; 唐果; 兰勇; 谭刚; 李相东; 陈军; 王桂林
Original assignee: Chengdu Donghua Zhuoyue Technology Co ltd
Current assignee: Chengdu Donghua Zhuoyue Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-03-16

Abstract

The invention relates to the technical field of valve bodies, in particular to a stop valve. A stop valve comprises a valve seat, a control oil cylinder, a valve body and a valve rod assembly; the valve rod assembly comprises a first valve rod and a second valve rod; the end part of one end, facing the second valve rod, of the first valve rod is provided with a spherical concave surface, the end part of one end, facing the first valve rod, of the second valve rod is provided with a spherical convex surface, and the spherical concave surface is used for being in surface contact with the spherical convex surface; one end of the first valve rod extends out of the inner cavity through the opening and is connected with a piston rod of the control oil cylinder, and the first valve rod is abutted against the second valve rod under the driving action of the control oil cylinder so as to drive the second valve rod to move relative to the inner cavity, so that the first flow channel and the second flow channel are blocked or conducted. The stop valve is simple in structure and small in mechanism size, and can realize automatic control of an ultrahigh pressure hydraulic system, so that close-range operation of workers is reduced, and potential safety hazards are eliminated.

Description

Stop valve

Technical Field

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

Background

Common to the commercial cut-off valves are manual and pneumatic controls. When the working pressure is high, the manual control operation difficulty is high, the automatic control of the ultrahigh pressure hydraulic system is difficult to realize, and potential safety hazards exist in the close-range operation of workers; the pneumatically controlled mechanism is relatively large in size and inconvenient to use.

Disclosure of Invention

The invention aims to provide a stop valve which is simple in structure, small in mechanism size and capable of achieving automatic control of an ultrahigh pressure hydraulic system, so that close-range operation of workers is reduced, and potential safety hazards are eliminated.

The embodiment of the invention is realized by the following steps:

in a first aspect, the invention provides a stop valve, which comprises a valve seat, a control oil cylinder, a valve body and a valve rod assembly;

the valve body is provided with an inner cavity, an opening communicated with the inner cavity, a first flow passage and a second flow passage;

the control oil cylinder and the valve body are both connected with the valve seat;

the valve rod assembly comprises a first valve rod and a second valve rod; the first valve rod and the second valve rod are both connected with the inner cavity in a sliding manner; the end part of one end, facing the second valve rod, of the first valve rod is provided with a spherical concave surface, the end part of one end, facing the first valve rod, of the second valve rod is provided with a spherical convex surface, and the spherical concave surface is used for being in surface contact with the spherical convex surface;

one end of the first valve rod extends out of the inner cavity through the opening and is connected with a piston rod of the control oil cylinder, and the first valve rod is abutted against the second valve rod under the driving action of the control oil cylinder so as to drive the second valve rod to move relative to the inner cavity, so that the first flow channel and the second flow channel are blocked or conducted.

In an alternative embodiment, the valve stem assembly further comprises a connecting ring;

the connecting ring is movably connected with the first valve rod and the second valve rod and covers the spherical concave surface and the spherical convex surface.

In an alternative embodiment, the outer peripheral surface of the first valve stem facing the end of the second valve stem and the outer peripheral surface of the second valve stem facing the end of the first valve stem are each provided with an annular groove for connection with the connecting ring.

In an alternative embodiment, the shut-off valve further comprises a bonnet; the inner cavity comprises a first cavity, a second cavity and a third cavity which are sequentially arranged along the axial direction of the first valve rod, and the first cavity is communicated with the second cavity; the first flow passage and the second flow passage are communicated with the third cavity;

the valve cap extends into the first cavity from the opening and is matched with the first cavity, a movable passage is formed in the valve cap along the axis direction of the first valve rod, and the movable passage is communicated with the second cavity;

the first valve rod, the connecting ring and the second valve rod are all matched with the movable channel in a sliding mode; one end of the first valve rod extends out of the movable channel and is connected with a piston rod of the control oil cylinder, and one end of the second valve rod extends into the third cavity; the second valve rod moves relative to the third cavity under the driving action of the first valve rod, and blocks or conducts the first flow passage and the second flow passage.

In an alternative embodiment, the cross-sectional areas of the first cavity, the second cavity, and the third cavity decrease in order along the axial direction of the first valve stem.

In an alternative embodiment, the shut-off valve further comprises a gland connected to the valve body and abutting an end of the bonnet at the opening.

In an alternative embodiment, the shut-off valve further comprises a sealing ring disposed within the second cavity;

the sealing ring is sleeved on the second valve rod and matched with the second cavity.

In an alternative embodiment, the shut-off valve further comprises a compression ring disposed within the second cavity;

the second valve rod is sleeved with the compression ring, the compression ring is matched with the second cavity and is positioned at the interval between the sealing ring and the second cavity so as to limit the sliding of the sealing ring in the second cavity.

In an optional embodiment, an oil inlet channel and an oil outlet channel are formed in the valve seat, and the oil inlet channel and the oil outlet channel are respectively communicated with an oil inlet of the control oil cylinder and an oil outlet of the control oil cylinder.

In an optional embodiment, the valve seat is provided with a liquid inlet and a liquid outlet, and the first flow passage and the second flow passage are respectively communicated with the liquid inlet and the liquid outlet.

The embodiment of the invention has the beneficial effects that:

the stop valve comprises a valve seat, a control oil cylinder, a valve body and a valve rod assembly; the valve rod assembly comprises a first valve rod and a second valve rod, and the first valve rod and the second valve rod are slidably connected with the inner cavity; the piston rod of control cylinder is connected with first valve rod, so the motion of the piston rod of control cylinder can drive first valve rod and move for the inner chamber, and first valve rod can with the second valve rod butt at the in-process of motion, and then can drive the motion of second valve rod to block or switch on first runner and second runner, adjust with the state of switching on to this stop valve.

One end that is close to each other at first valve rod and second valve rod is provided with spherical concave surface and spherical convex surface respectively, and drives the in-process of second valve rod motion at first valve rod, and spherical concave surface and spherical convex surface butt, the mode of the face contact through spherical surface can play the effect of aligning to can adjust the direction of motion of second valve rod, and then make the direction of motion of second valve rod and first valve rod unanimous, thereby improve the stability of second valve rod motion.

The stop valve adopts a mode of controlling the oil cylinder to drive the valve rod assembly to move so as to adjust the conduction state of the stop valve, so that the loading mode of the hydraulic oil cylinder can reduce the volume of the stop valve. Moreover, due to the adoption of the structure, the automatic control of the stop valve can be conveniently realized, so that the automatic control of an ultrahigh pressure hydraulic system can be realized, the close-range operation of workers can be reduced, and the potential safety hazard can be eliminated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a stop valve in an embodiment of the invention;

FIG. 2 is a cross-sectional view of the embodiment of the present invention with the shut-off valve open;

FIG. 3 is a cross-sectional view of an embodiment of the present invention with the shut-off valve blocked;

FIG. 4 is a schematic illustration of the construction of a valve stem assembly in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a valve body according to an embodiment of the present invention;

FIG. 6 is a schematic view of the valve body and bonnet construction of an embodiment of the invention;

FIG. 7 is a schematic view of a bonnet and gland in an embodiment of the invention.

The figure is 200-stop valve; 210-a valve seat; 220-control oil cylinder; 230-a valve body; 240-valve stem assembly; 231-an inner cavity; 232-opening; 233-a first flow channel; 234 — a second flow channel; 241-a first valve stem; 242-a second valve stem; 243-spherical concave surface; 244-spherical convex surface; 245-a connecting ring; 246-an annular groove; 250-valve cap; 235-a first cavity; 236-a second cavity; 237-a third cavity; 251-an active channel; 260-a gland; 271-a sealing ring; 272-a compression ring; 211-an oil inlet channel; 212-oil outlet channel; 213-liquid inlet; 214-liquid outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, fig. 1 to 3 show the structure of a stop valve in an embodiment of the present invention, fig. 4 shows the structure of a valve stem assembly in an embodiment of the present invention, and fig. 5 shows the structure of a valve body in an embodiment of the present invention; wherein, fig. 2 shows a position when the second valve rod leads the first flow passage and the second flow passage, fig. 3 shows a position when the second valve rod blocks the first flow passage and the second flow passage, and directions of arrows a and B in fig. 2 are flowing directions of fluid in the valve body;

the present embodiment provides a shutoff valve 200, and the shutoff valve 200 includes a valve seat 210, a control cylinder 220, a valve body 230, and a valve stem assembly 240.

The valve body 230 is provided with an inner cavity 231, and an opening 232, a first flow passage 233, and a second flow passage 234 that communicate with the inner cavity 231.

The control cylinder 220 and the valve body 230 are connected to the valve seat 210.

The stem assembly 240 includes a first stem 241 and a second stem 242; the first and

second stems

241, 242 are slidably connected to the internal cavity 231; an end of the first stem 241 facing an end of the second stem 242 is provided with a spherical concave surface 243, an end of the second stem 242 facing an end of the first stem 241 is provided with a spherical convex surface 244, and the spherical concave surface 243 is used for surface contact with the spherical convex surface 244.

One end of the first valve rod 241 extends out of the inner cavity 231 from the opening 232 and is connected with the piston rod of the control cylinder 220, and the first valve rod 241 is used for abutting against the second valve rod 242 under the driving action of the control cylinder 220 to drive the second valve rod 242 to move relative to the inner cavity 231, so as to block or conduct the first flow passage 233 and the second flow passage 234.

The opening 232 on the valve body 230 is used for allowing the valve rod assembly 240 to extend into the valve body 230, and is convenient for the valve rod assembly 240 to be in transmission connection with the control oil cylinder 220; the inner cavity 231 is used for moving the valve stem assembly 240, so that the movement of the valve stem assembly 240 can block or conduct the first flow passage 233 and the second flow passage 234, thereby achieving the blocking and communication of the fluid medium. It should be noted that, by setting the control cylinder 220, the structural size can be reduced, and at the same time, the loading force for driving the valve rod assembly 240 to move is ensured, so as to meet the hydraulic control requirement of ultrahigh pressure. And through the cooperation of spherical sunken face 243 and spherical convex face 244, can increase the area of contact of first valve stem 241 with second valve stem 242 to can improve the stability of biography power, and the contact of spherical face can play the effect of aligning, and then can play the effect of guide to the direction of motion of second valve stem 242, thereby improve the motion stability of valve stem assembly 240. It should be noted that the positions of the spherical concave surface 243 and the spherical convex surface 244 can be interchanged.

The working principle of the stop valve 200 is as follows:

the shut-off valve 200 comprises a valve seat 210, a control cylinder 220, a valve body 230 and a valve stem assembly 240; wherein the stem assembly 240 comprises a first stem 241 and a second stem 242, and the first stem 241 and the second stem 242 are slidably connected to the inner cavity 231; the piston rod of the control cylinder 220 is connected to the first valve rod 241, so that the movement of the piston rod of the control cylinder 220 can drive the first valve rod 241 to move relative to the inner cavity 231, and the first valve rod 241 abuts against the second valve rod 242 during the movement process, so as to drive the second valve rod 242 to move, thereby blocking or conducting the first flow passage 233 and the second flow passage 234, so as to adjust the conducting state of the stop valve 200.

One end that is close to each other at first valve stem 241 and second valve stem 242 is provided with spherical sunken surface 243 and spherical protruding surface 244 respectively, and in the in-process that first valve stem 241 drove the motion of second valve stem 242, spherical sunken surface 243 and spherical protruding surface 244 butt, the mode through the face contact of spherical surface, can play the effect of aligning, thereby can adjust the direction of motion of second valve stem 242, and then make the direction of motion of second valve stem 242 and first valve stem 241 unanimous, thereby improve the stability of second valve stem 242 motion.

Since the stop valve 200 adopts a mode that the control oil cylinder 220 drives the valve rod assembly 240 to move so as to adjust the conduction state of the stop valve 200, the loading mode of the hydraulic oil cylinder can reduce the volume of the stop valve 200. Moreover, due to the adoption of the structure, the automatic control of the stop valve 200 can be conveniently realized, so that the automatic control of an ultrahigh pressure hydraulic system can be realized, the close-range operation of workers can be reduced, and the potential safety hazard can be eliminated.

Further, referring to fig. 4, in the present embodiment, in order to reduce noise generated during the operation of the shutoff valve 200 and improve the motion stability of the valve stem assembly 240, the valve stem assembly 240 further includes a connection ring 245; the connecting ring 245 is movably connected with the first valve stem 241 and the second valve stem 242, and the connecting ring 245 covers the spherical concave surface 243 and the spherical convex surface 244, so that the connecting ring 245 can play a role of linking the first valve stem 241 and the second valve stem 242 to reduce a gap between the first valve stem 241 and the second valve stem 242, thereby reducing impact stress of the first valve stem 241 and the second valve stem 242 in a working process and reducing working noise.

Specifically, the outer peripheral surface of the first stem 241 facing the end of the second stem 242 and the outer peripheral surface of the second stem 242 facing the end of the first stem 241 are both provided with an annular groove 246, and the annular groove 246 is used for connecting with a connecting ring 245. The connecting ring 245 is in clearance fit with both of the two annular grooves 246 to reduce the clearance between the first valve stem 241 and the second valve stem 242, and the connecting ring 245 has a certain mobility with both of the first valve stem 241 and the second valve stem 242, so that when the first valve stem 241 and the second valve stem 242 are abutted, the first valve stem 241 and the second valve stem 242 can be guided by the centering action of the spherical surface, and the stability of the movement is improved.

Further, referring to fig. 1-7, fig. 6 and 7 show the structures of the bonnet and the gland in the embodiment of the present invention, in the embodiment, in order to improve the sealing performance of the stop valve 200 to meet the hydraulic control requirement of the ultra-high pressure, the stop valve 200 further includes a bonnet 250; the inner cavity 231 comprises a first cavity 235, a second cavity 236 and a third cavity 237 which are sequentially arranged along the axial direction of the first valve rod 241, and the first cavity 235 is communicated with the second cavity 236; the first flow channel 233 and the second flow channel 234 are communicated with the third cavity 237; the bonnet 250 extends into the first cavity 235 from the opening 232 and is engaged with the first cavity 235, and the bonnet 250 is provided with a movable passage 251 along the axial direction of the first stem 241, and the movable passage 251 is communicated with the second cavity 236.

The first valve stem 241, the connecting ring 245 and the second valve stem 242 are slidably engaged with the movable channel 251; one end of the first valve rod 241 extends out of the movable channel 251 and is connected with the piston rod of the control cylinder 220, and one end of the second valve rod 242 extends into the third cavity 237; the second stem 242 moves relative to the third chamber 237 under the driving action of the first stem 241, and blocks or communicates the first flow channel 233 and the second flow channel 234.

Further, referring to fig. 5 to 7, in the present embodiment, the cross-sectional areas of the first cavity 235, the second cavity 236 and the third cavity 237 are sequentially decreased along the axial direction of the first valve stem 241, so that the connection position of the bonnet 250 is limited by such an arrangement.

It should be noted that, since the inner cavity 231 is divided into the first cavity 235, the second cavity 236 and the third cavity 237, and the first cavity 235, the second cavity 236 and the third cavity 237 are sequentially arranged along the axial direction of the first valve rod 241, and the first cavity 235 is communicated with the opening 232, after the bonnet 250 is matched with the first cavity 235, the movable channel 251 of the bonnet 250 is communicated with the second cavity 236, so that the inner cavity 231 can be sealed by sealing the movable channel 251 and the second cavity 236, the first valve rod 241, the connecting ring 245 and the second valve rod 242 are slidably matched with the movable channel 251, and the first valve rod 241 and the connecting ring 245 are attached to the inner circumferential surface of the movable channel 251, so that the movable channel 251 can be sealed, and the sealing performance of the stop valve 200 can be improved.

Further, in order to improve the installation stability of the bonnet 250 to meet the cut-off requirement of the ultra-high pressure, the cut-off valve 200 further includes a gland 260, and the gland 260 is connected with the valve body 230 and abuts against one end of the bonnet 250 at the opening 232 to fix the bonnet 250 and seal the connection between the bonnet 250 and the valve body 230.

Referring to fig. 5-7, in the present embodiment, in order to seal the valve body 230, the stop valve 200 further includes a sealing ring 271 disposed in the second cavity 236; the sealing ring 271 is sleeved on the second stem 242 and is matched with the second cavity 236, that is, the sealing ring 271 is tightly attached to the inner walls of the second stem 242 and the second cavity 236, so as to seal the second cavity 236, thereby avoiding the leakage. Additionally, shut-off valve 200 further includes a compression ring 272 disposed within second chamber 236; the pressing ring 272 is sleeved on the second valve stem 242, the pressing ring 272 is engaged with the second cavity 236 and is located at the interval between the sealing ring 271 and the second cavity 236 to limit the sliding of the sealing ring 271 in the second cavity 236, so that in this way, the play amount of the sealing ring 271 in the second cavity 236 is reduced, and the sealing performance is improved.

Further, referring to fig. 2, in the present embodiment, in order to reduce the size of the stop valve 200, an oil inlet channel 211 and an oil outlet channel 212 are disposed on the valve seat 210, and the oil inlet channel 211 and the oil outlet channel 212 are respectively communicated with an oil inlet of the control cylinder 220 and an oil outlet of the control cylinder 220; the valve seat 210 has a liquid inlet 213 and a liquid outlet 214, and the first flow passage 233 and the second flow passage 234 are respectively connected to the liquid inlet 213 and the liquid outlet 214.

The above description is only exemplary of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stop valve, characterized by:

the stop valve comprises a valve seat, a control oil cylinder, a valve body and a valve rod assembly;

the valve rod assembly comprises a first valve rod and a second valve rod; the first valve stem and the second valve stem are both slidably connected with the internal cavity; the end part of the first valve rod, facing one end of the second valve rod, is provided with a spherical concave surface, the end part of the second valve rod, facing one end of the first valve rod, is provided with a spherical convex surface, and the spherical concave surface is used for being in surface contact with the spherical convex surface;

one end of the first valve rod extends out of the inner cavity from the opening and is connected with a piston rod of the control oil cylinder, and the first valve rod is abutted against the second valve rod under the driving action of the control oil cylinder so as to drive the second valve rod to move relative to the inner cavity, so that the first flow passage and the second flow passage are blocked or conducted.

2. The shut-off valve of claim 1, wherein:

the valve stem assembly further comprises a connecting ring;

the connecting ring is movably connected with the first valve rod and the second valve rod, and the connecting ring covers the spherical concave surface and the spherical convex surface.

3. The shut-off valve of claim 2, wherein:

and annular grooves are formed in the outer peripheral surface of one end, facing the second valve rod, of the first valve rod and the outer peripheral surface of one end, facing the first valve rod, of the second valve rod, and are used for being connected with the connecting ring.

4. The shut-off valve of claim 2, wherein:

the shut-off valve further comprises a bonnet; the inner cavity comprises a first cavity, a second cavity and a third cavity which are sequentially arranged along the axial direction of the first valve rod, and the first cavity is communicated with the second cavity; the first flow channel and the second flow channel are communicated with the third cavity;

the valve cap extends into the first cavity from the opening and is matched with the first cavity, a movable passage is formed in the valve cap along the axial direction of the first valve rod, and the movable passage is communicated with the second cavity;

the first valve stem, the connecting ring, and the second valve stem are all slidably engaged with the movable channel; one end of the first valve rod extends out of the movable channel and is connected with a piston rod of the control oil cylinder, and one end of the second valve rod extends into the third cavity; the second valve rod moves relative to the third cavity under the driving action of the first valve rod, and blocks or conducts the first flow passage and the second flow passage.

5. The shut-off valve of claim 4, wherein:

along the axis direction of the first valve rod, the cross-sectional areas of the first cavity, the second cavity and the third cavity are reduced in sequence.

6. The shut-off valve of claim 4, wherein:

the stop valve still includes the gland, the gland with the valve body is connected, and with the valve cap is located the one end butt of opening part.

7. The shut-off valve of claim 4, wherein:

the stop valve further comprises a sealing ring disposed within the second cavity;

8. The shut-off valve of claim 7, wherein:

the stop valve further comprises a compression ring disposed within the second cavity;

the compression ring is sleeved on the second valve rod, is matched with the second cavity and is positioned at the interval between the sealing ring and the second cavity so as to limit the sliding of the sealing ring in the second cavity.

9. A stop valve according to any one of claims 1-8, wherein:

an oil inlet channel and an oil outlet channel are formed in the valve seat and are respectively communicated with an oil inlet of the control oil cylinder and an oil outlet of the control oil cylinder.

10. A stop valve according to any one of claims 1-8, wherein:

the valve seat is provided with a liquid inlet and a liquid outlet, and the first flow passage and the second flow passage are respectively communicated with the liquid inlet and the liquid outlet.