CN219242725U

CN219242725U - Safety valve

Info

Publication number: CN219242725U
Application number: CN202320294909.7U
Authority: CN
Inventors: 李鹏; 孙勇; 郑开元; 马哲; 李伟
Original assignee: China Three Gorges Corp
Current assignee: China Three Gorges Corp
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-06-23
Anticipated expiration: 2033-02-21
Also published as: JP3242142U

Abstract

The utility model relates to the technical field of fluid safety valves, and aims to provide a safety valve. The safety valve has simple structure, easy processing and manufacturing and small flow resistance. The safety valve includes: the valve comprises a first valve body, a second valve body, a driving assembly and a valve clack assembly. The first valve body is provided with a first flow passage; the second valve body is provided with a second flow passage, and one end of the second flow passage is connected with one end of the first valve body; the driving component is arranged on the first valve body; the valve clack subassembly includes valve clack and valve rod, and the valve clack sets up in first runner, and the one end and the drive end of drive assembly of valve rod are connected, and the other end and valve clack fixed connection, valve rod are suitable for driving the valve clack and rotate under the effect of drive end, and first runner has the open state that valve clack axis and first valve body axis looks vertically and the closed state that valve clack axis and first valve body axis coincide. The utility model solves the problems of complex valve seat structure, high processing difficulty, high flow resistance and inconvenience for fluid circulation of the safety valve in the prior art.

Description

Safety valve

Technical Field

The utility model relates to the technical field of fluid safety valves, in particular to a safety valve.

Background

Many water supply pipelines are laid in city water supply engineering or industrial water supply engineering to deliver water to various water points. When the water supply pipeline explodes, a large amount of water leaks out and can influence the normal life of people and can cause the waste of water resource. A safety valve is often provided in the water supply line to cope with the occurrence of a pipe burst. The safety valve does not need to be electrically driven, the pressure of the pipeline in front of and behind the valve is used as a judging condition, and the valve is driven to act through the fluid pressure in the pipeline, so that the water supply pipeline can be quickly and accurately closed, the influence of water leakage is reduced, and the waste of water resources is reduced.

Existing safety valves generally consist of three parts: the pressure measuring device comprises a valve seat, a pressure measuring pipe and a driving assembly, wherein the valve seat is connected with the pressure measuring pipe, a channel for fluid circulation is arranged in the middle of the valve seat and the pressure measuring pipe, and the inner diameter of the valve seat is larger than that of the pressure measuring pipe. The driving assembly comprises a driving valve seat, a piston is arranged in the driving valve seat, the upper side of the piston is communicated with the valve seat, the lower side of the piston is communicated with the pressure measuring pipe, one end of the piston rod is connected with the piston, the other end of the piston rod extends into the valve seat, a valve disc is arranged at the end of the piston rod, and a reset spring is sleeved on the piston rod.

Flow Q through the relief valve and valve seat inner diameter D ₁ Inner diameter D of piezometer tube ₂ And fluid flow velocity v in valve seat ₁ Flow velocity v of fluid in pressure measuring tube ₂ The relationship between them can be expressed by the following formula:

furthermore, the ratio of the valve seat inner diameter to the pressure tube inner diameter is k, then +.>

According to the three formulas, the re-bipyramidKnoop equation: />

Can get +.>

When tube explosion occurs, the flow velocity v of fluid flowing through the safety valve ₁ The pressure difference at two sides of the piston is increased, and when the pressure difference is larger than the elastic force of the spring, the piston is pushed to move with the piston rod and the valve disc. When the fluid passage in the valve seat is closed by the valve disc, the fluid cannot continue to circulate, and the relief valve is in a closed state.

The valve disc of the existing safety valve moves linearly, and the moving direction is perpendicular to the axial direction of the valve seat and the pressure measuring pipe, so that an arc-shaped structure for changing the flowing direction of fluid is processed on the valve seat, and the valve disc is matched with the arc-shaped structure to realize the function of a closed channel. Therefore, the valve seat has a complex structure and high processing difficulty. And the arcuate structure and valve disc also increase the resistance to flow of the liquid, which is detrimental to fluid communication.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defects of complex valve seat structure, high processing difficulty, high flow resistance and unfavorable fluid circulation of the safety valve in the prior art, thereby providing the safety valve with simple structure, easy processing and manufacturing and low flow resistance.

In order to solve the above problems, the present utility model provides a safety valve comprising:

a first valve body having a first flow passage;

the second valve body is provided with a second flow passage, one end of the second valve body is connected with one end of the first valve body, and the first flow passage is communicated with the second flow passage;

the driving assembly is arranged on the first valve body or the second valve body;

the valve clack assembly comprises a valve clack and a valve rod, wherein the valve clack is arranged in the first flow passage, one end of the valve rod is connected with the driving end of the driving assembly, the other end of the valve rod is fixedly connected with the valve clack, the valve rod is suitable for driving the valve clack to rotate under the action of the driving end, and the first flow passage is provided with an opening state in which the axis of the valve clack is perpendicular to the axis of the first valve body and a closing state in which the axis of the valve clack is coincident with the axis of the first valve body.

Optionally, a protrusion structure is formed on the first flow channel, and when the first flow channel is in the closed state, the outer edge of the valve clack is attached to the inner wall of the protrusion structure.

Optionally, the protruding structure is annular protruding, the valve clack is discoid, the internal diameter of annular protruding equals the diameter of valve clack.

Optionally, the connection point of the valve stem and the valve flap is offset from the center of the valve flap.

Optionally, the valve clack assembly further comprises a pivot, wherein the pivot is fixedly arranged on the valve clack, and the pivot is fixedly connected with one end, far away from the driving end, of the valve rod.

Optionally, the drive assembly set up in on the first valve body, it includes disk seat, actuating lever, piston and elastic element, the disk seat has the cavity, be provided with in the cavity the piston, the one end of actuating lever with piston fixed connection, the other end extends the disk seat outside and with the valve rod is connected, the spring housing is established on the actuating lever, its one end with the piston butt, the other end with the inner wall butt of disk seat.

Optionally, the axial direction of the driving rod is parallel to the axial direction of the first valve body.

Optionally, a side of the piston connected with the driving rod is communicated with the second flow channel, and a side of the piston far away from the driving rod is communicated with the first flow channel.

Optionally, a first connecting port is formed on the first valve body, the first connecting port is communicated with the first flow channel, a second connecting port is formed on the second valve body, the second connecting port is communicated with the second flow channel, one side, connected with the driving rod, of the piston is connected with the second connecting port through a first pipeline, and one side, far away from the driving rod, of the piston is connected with the first connecting port through a second pipeline.

Optionally, the diameter of the first flow channel is larger than the diameter of the second flow channel.

The utility model has the following advantages:

1. the safety valve provided by the utility model has the advantages that the first valve body is provided with the first flow passage, the second valve body is provided with the second flow passage, and the first flow passage and the second flow passage are communicated for fluid flow. The valve clack subassembly includes valve clack and valve rod, and the valve clack sets up in first runner, and the one end and the drive end of drive assembly of valve rod are connected, the other end and valve clack fixed connection. Under the drive of the drive component, the valve rod drives the valve clack to rotate, and when the axis of the valve clack is vertical to the axis of the first valve body, the first flow passage is in an open state; when the axis of the valve clack is coincident with the axis of the first valve body, the first flow passage is in a closed state. The first flow channel can be closed through the lamination of the valve clack and the inner wall of the first valve body, and the first valve body is simple in structure and easy to process. When the first flow passage is in an open state, the valve clack occupies a smaller flow area of the first flow passage, and the first valve body does not need to be provided with other structures for changing the flow direction of the fluid, so that the flow resistance of the whole safety valve is smaller.

2. According to the safety valve provided by the utility model, the protruding structure is formed on the first flow channel, the protruding structure is preferably an annular protrusion, the valve clack is disc-shaped, the inner diameter of the annular protrusion is equal to the diameter of the valve clack, and when the valve clack rotates to the outer edge of the valve clack to be attached to the inner wall of the protruding structure, the first flow channel can be closed, and the flow of fluid is blocked. The structure of the first valve body is simplified, and the processing and the manufacturing are easy. And the valve clack assembly is convenient to operate and control, and can quickly and accurately close the first flow passage.

3. The connecting point of the valve rod and the valve clack deviates from the center of the valve clack, so that the valve rod needs smaller force when driving the valve clack to rotate, and the operation is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a safety valve of the present utility model.

Reference numerals illustrate:

1. the valve comprises a first valve body, 101, a first flow channel, 102, a convex structure, 103 and a first connecting port;

2. a second valve body 201, a second flow channel 202 and a second connecting port;

3. a drive assembly 301, a valve seat 302, a drive rod 303, a piston 304, an elastic element;

4. a valve clack assembly 401, a valve clack, 402, a valve rod, 403, a pivot;

5. a first pipe;

6. and a second pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1, a preferred embodiment of the safety valve of the present utility model is shown. The safety valve is suitable for being installed in a water supply pipeline, when the pipe explosion phenomenon occurs, the valve can be quickly and accurately closed without manual intervention, the circulation of fluid is cut off, the influence of water leakage on the daily life of people is reduced, and the waste of water resources is reduced.

The safety valve includes: a first valve body 1, a second valve body 2, a driving assembly 3 and a valve clack assembly 4. The first valve body 1 has a cylindrical first flow passage 101, and a first connection port 103 is provided in the first valve body 1, and the first connection port 103 communicates with the first flow passage 101. And flanges are provided at both ends of the first valve body 1. Further, a protrusion structure 102 is formed on the first flow path 101, and specifically, in the present embodiment, the protrusion structure 102 is preferably an annular protrusion. The second valve body 2 has a cylindrical second flow passage 201, and a second connection port 202 is opened in the second valve body 2, and the second connection port 202 communicates with the second flow passage 201. The second valve body 2 is likewise provided with flanges at both ends.

One end of the second valve body 2 is connected with one end of the first valve body 1 through a flange, and the connection is sealed. The other end of the first valve body 1 and the other end of the second valve body 2 can be connected into a water supply pipeline through a flange, the other end of the first valve body 1 is a liquid inlet end, and the other end of the second valve body 2 is a liquid outlet end. After the first valve body 1 is connected with the second valve body 2, the first flow channel 101 and the second flow channel 201 are communicated for fluid circulation, and the diameter of the first flow channel 101 is larger than that of the second flow channel 201.

Further, the driving component 3 is disposed on the first valve body 1 or the second valve body 2, and is mainly used for driving the valve clack component 4 to act. Specifically, in this embodiment, the driving component 3 is disposed on the first valve body 1, and is fixedly connected with the first valve body 1 through a bolt and a nut, and the driving component 3 includes: a valve seat 301, a drive rod 302, a piston 303 and an elastic element 304. The valve seat 301 is composed of a left valve cover and a right valve cover which are connected, a cavity is formed by surrounding the left valve cover and the right valve cover, a piston 303 is arranged in the cavity, the piston 303 and the left valve cover form a left cavity, and the piston 303 and the right valve cover form a right cavity. One end of the driving rod 302 is fixedly connected with the piston 303, and the other end extends out of the valve seat 301 and is connected with the valve clack assembly 4, and one end extending out of the valve seat 301 is the driving end. The axial direction of the drive lever 302 is disposed in parallel with the axial direction of the first valve body 1. The elastic element 304 is sleeved on the driving rod 302, one end of the elastic element is abutted against the piston 303, and the other end is abutted against the inner wall of the valve seat 301. In this embodiment, the elastic element 304 is preferably a spring.

The side of the piston 303 connected to the drive rod 302 is in communication with the second flow channel 201, i.e. the left chamber is in communication with the second flow channel 201, and the side of the piston 303 remote from the drive rod 302 is in communication with the first flow channel 101, i.e. the right chamber is in communication with the first flow channel 101. Specifically, in the present embodiment, the third connection port is formed on the left valve cover of the valve seat 301, the second connection port 202 is communicated with the third connection port through the first pipe 5, so that the fluid pressure in the second flow channel 201 can be led to the side where the piston 303 is connected with the driving rod 302, and the first connection port 103 is communicated with the fourth connection port through the second pipe 6, so that the fluid pressure in the first flow channel 101 can be led to the side where the piston 303 is far away from the driving rod 302. When the pressure difference between the two sides of the piston 303 is larger than the elastic force of the spring, the driving rod 302 can be pushed to move leftwards, and the valve clack assembly 4 can be driven to move. When the pressure difference between the two sides of the piston 303 is smaller than the elastic force, the spring is reset, and the driving rod 302 is synchronously driven to move to the right.

Further, the valve clack assembly 4 comprises a valve clack 401 and a valve rod 402, wherein the valve clack 401 is arranged in the first flow channel 101, one end of the valve rod 402 is connected with the driving end of the driving assembly 3, and the other end of the valve rod is fixedly connected with the valve clack 401. The valve rod 402 is adapted to drive the valve clack 401 to rotate along the radial direction of the first flow channel 101 under the action of the driving end of the driving assembly 3. The first flow passage 101 has an open state in which the axis of the valve flap 401 is perpendicular to the axis of the first valve body 1 and a closed state in which the axis of the valve flap 401 coincides with the axis of the first valve body 1. When the first flow channel 101 is in a closed state, the outer edge of the valve clack 401 is attached to the inner wall of the protruding structure 102 formed on the first flow channel 101. Specifically, since the protrusion structure 102 is preferably an annular protrusion in this embodiment, the valve flap 401 is preferably disk-shaped, and the inner diameter of the annular protrusion is equal to the diameter of the valve flap 401. The valve flap 401 can thus be in close engagement with the annular protrusion, impeding the passage of fluid.

The connection point of the valve rod 402 and the valve clack 401 deviates from the center of the valve clack 401, namely, the connection point of the valve rod 402 and the valve clack 401 is in an eccentric position, so that the driving force required by the valve rod 402 is smaller, the valve clack 401 can be driven to rotate more quickly, and the first flow channel 101 can be closed quickly.

In addition, the valve clack assembly 4 further comprises a pivot 403, wherein the pivot 403 is fixedly arranged on the valve clack 401, and the pivot 403 is fixedly connected with one end of the valve rod 402 away from the driving end.

The following describes the working principle of the safety valve provided in this embodiment as follows:

the safety valve is connected into a water supply pipeline, one end of the first valve body 1, which is far away from the second valve body 2, is a liquid inlet end, one end of the second valve body 2, which is far away from the first valve body 1, is a liquid outlet end, and water in the water supply pipeline enters from the liquid inlet end and flows out from the liquid outlet end. When the safety valve works normally, the water pressure in the first flow channel 101 and the second flow channel 201 is at a stable value, and the flow rate of the water flowing through the first flow channel 101 and the second flow channel 201 is also at a stable value, so that the pressure difference at two sides of the piston 303 is smaller than the elastic force, and the piston 303 is positioned at the rightmost end in the cavity of the valve seat 301. At this time, the axis of the valve flap 401 is perpendicular to the axis of the first valve body 1, and the first flow passage 101 is in an open state.

When the second valve body 2 is burst downstream, the flow rate and flow rate of the first flow channel 101 and the second flow channel 201 are rapidly increased, and the pressure difference between two sides of the piston 303 is greater than the elastic force, so that the driving rod 302 is pushed to move leftwards under the action of the water pressure, and the valve rod 402 is pushed to drive the valve clack 401 to rotate. Because the connection point of the valve clack 401 and the valve rod 402 deviates from the center of the valve clack 401, when the valve clack 401 rotates, water flowing through the first flow channel 101 can impact the surface of the valve clack 401, the rotation of the valve clack 401 is accelerated until the outer edge of the valve clack 401 is attached to the inner wall of the annular bulge, when the first flow channel 101 is in a closed state, the water can not flow from the liquid inlet end to the liquid outlet end, and the water can not leak from the damaged part of the water supply pipeline.

In other embodiments, the driving assembly 3 may also be fixedly disposed on the second valve body 2.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A safety valve, comprising:

a first valve body (1), the first valve body (1) having a first flow passage (101);

a second valve body (2), wherein the second valve body (2) is provided with a second flow channel (201), one end of the second valve body (2) is connected with one end of the first valve body (1), and the first flow channel (101) and the second flow channel (201) are communicated;

the driving assembly (3) is arranged on the first valve body (1) or the second valve body (2);

the valve clack assembly (4) comprises a valve clack (401) and a valve rod (402), wherein the valve clack (401) is arranged in the first flow passage (101), one end of the valve rod (402) is connected with the driving end of the driving assembly (3), the other end of the valve rod (402) is fixedly connected with the valve clack (401), the valve rod (402) is suitable for driving the valve clack (401) to rotate under the action of the driving end, and the first flow passage (101) is provided with an opening state in which the axis of the valve clack (401) is perpendicular to the axis of the first valve body (1) and a closing state in which the axis of the valve clack (401) is coincident with the axis of the first valve body (1).

2. The safety valve according to claim 1, wherein the first flow passage (101) is formed with a protrusion structure (102), and when the first flow passage (101) is in the closed state, an outer edge of the valve flap (401) is attached to an inner wall of the protrusion structure (102).

3. The safety valve according to claim 2, wherein the protrusion structure (102) is an annular protrusion, the valve flap (401) is disc-shaped, and an inner diameter of the annular protrusion is equal to a diameter of the valve flap (401).

4. A safety valve according to claim 1, characterized in that the connection point of the valve stem (402) to the flap (401) is offset from the centre of the flap (401).

5. The safety valve according to claim 4, wherein the valve flap assembly (4) further comprises a pivot (403), the pivot (403) being fixedly arranged on the valve flap (401), the pivot (403) being fixedly connected to an end of the valve stem (402) remote from the driving end.

6. The safety valve according to claim 1, wherein the driving assembly (3) is disposed on the first valve body (1), and comprises a valve seat (301), a driving rod (302), a piston (303) and an elastic element (304), the valve seat (301) is provided with a cavity, the piston (303) is disposed in the cavity, one end of the driving rod (302) is fixedly connected with the piston (303), the other end extends out of the valve seat (301) and is abutted with the valve rod (402), and the elastic element (304) is sleeved on the driving rod (302), one end of the elastic element is abutted with the piston (303), and the other end of the elastic element is abutted with the inner wall of the valve seat (301).

7. The safety valve according to claim 6, characterized in that the axial direction of the drive rod (302) is parallel to the axial direction of the first valve body (1).

8. The safety valve according to claim 6, characterized in that the side of the piston (303) connected to the drive rod (302) communicates with the second flow channel (201), and the side of the piston (303) remote from the drive rod (302) communicates with the first flow channel (101).

9. The safety valve according to claim 8, wherein the first valve body (1) is provided with a first connection port (103), the first connection port (103) is communicated with the first flow channel (101), the second valve body (2) is provided with a second connection port (202), the second connection port (202) is communicated with the second flow channel (201), one side, connected with the driving rod (302), of the piston (303) is connected with the second connection port (202) through a first pipeline (5), and one side, far away from the driving rod (302), of the piston (303) is connected with the first connection port (103) through a second pipeline (6).

10. A safety valve according to any one of claims 1-9, characterized in that the diameter of the first flow channel (101) is larger than the diameter of the second flow channel (201).