CN114635986A - Valve capable of being automatically closed under influence of pressure - Google Patents

Abstract

The invention discloses a valve which can be automatically closed under the influence of pressure and can be applied to the production process of chemical materials, comprising a valve body, a valve seat, a valve core, an elastic part and a pneumatic mechanism, wherein the valve body is provided with a valve seat; the valve seat and the valve core are arranged in the valve body, and the valve core is used for abutting against the valve seat to close the valve; the elastic piece drives the valve core to keep a distance with the valve seat; pneumatic mechanism includes the cylinder, the piston, piston rod and body, the cylinder setting is in the valve body, the first end of cylinder is sealed, the piston setting is in the cylinder, the one end of piston rod links to each other with the piston, the other end links to each other with the case, the one end of body and the inner chamber intercommunication of cylinder, and the intercommunication department is located between piston and the first end of cylinder, the body other end is for having uncovered and being located outside the valve body, and when the atmospheric pressure increase between piston and the first end of cylinder, the case can be to disk seat one side removal. After the application of this valve, the valve can automatic cutout when the liquid in the container reaches certain degree of depth, and consequently the staff can go to carry out other work when putting liquid, need not to watch on by one side.

Description

Valve capable of being automatically closed under influence of pressure

Technical Field

The invention relates to the field of valves, in particular to a valve capable of being automatically closed under the influence of pressure.

Background

When liquid materials are put into the container through the pipeline, people are usually required to wait aside, and when the liquid reaches a specified position, the valve is closed, and the liquid discharge is stopped. For example, in the production process of chemical materials, liquid materials are often required to be placed into a container for storage, and the valve cannot be automatically closed when the liquid level reaches a specified position in the process, so that a special person is required to wait aside, and the valve is manually closed once the materials are full, but when the volume of the container for storing the materials is larger, the time for placing the materials is longer, so that the time for workers to wait aside is also very long, which not only delays the workers to normally perform other works, but also can not generate any labor value when the workers wait. In this regard, if a valve is designed that automatically shuts off when the liquid level reaches a given level, the worker is "freed" to allow for additional work without waiting for the valve to close at the container.

Disclosure of Invention

The invention aims to provide a valve capable of automatically closing under the influence of pressure, when the valve is arranged at the top of a container (or a pool) and the volume of the container (or the pool) is larger, when liquid is put into the container (or the pool), the valve can be automatically closed when the amount of the liquid reaches a certain degree, and manual closing is not needed.

To achieve the above object, according to an aspect of the present invention, there is provided a valve which is automatically closed by the influence of pressure, including:

one end of the valve body is a liquid inlet end, and the other end of the valve body is a liquid outlet end;

the valve seat is arranged in the inner cavity of the valve body;

the valve core is arranged in the inner cavity of the valve body and is used for abutting against the valve seat to block the communication between the liquid inlet end and the liquid outlet end of the valve body;

the elastic element directly or indirectly applies acting force to the valve core to drive the valve core to keep a distance with the valve seat;

the pneumatic mechanism comprises a cylinder barrel, a piston rod and a pipe body; the cylinder barrel is arranged in the inner cavity of the valve body, and one end of the cylinder barrel in the axial direction is closed and is a first end; the piston is arranged in the cylinder barrel and is in sealing fit with the inner cavity of the cylinder barrel through a sealing ring; the piston rod is arranged along the axial direction of the cylinder barrel, one end of the piston rod is connected with the piston, and the other end of the piston rod is connected with the valve core; one end of the pipe body is communicated with the inner cavity of the cylinder barrel, the communication position is located between the piston and the first end of the cylinder barrel, and the other end of the pipe body is provided with an opening and is located outside the valve body;

when the air pressure between the piston and the first end of the cylinder increases, the force applied to the piston by the air pressure causes the piston to pull the valve element toward the valve seat.

For the valve of the present invention, it can be installed by installing it on the top of the container (or tank), and then extending the pipe body (or the extension pipe connected below the pipe body) into the container (or tank) and extending it to a position near the bottom of the container (or tank); then, the liquid inlet end of the valve body is connected with a liquid supply pipeline, a liquid supply valve is arranged on the liquid supply pipeline, and liquid flowing out of the liquid outlet end can flow into a container (or a pool);

when in use, the liquid supply valve of the liquid supply pipeline is opened, and at the moment, the valve core and the valve seat have a distance under the action of the elastic piece, so the valve is opened, and liquid can directly pass through the valve and then flow into the container (or the pool); when the liquid in the container (or the pool) is more and more, the liquid entering the valve pipe body (or the pipeline connected below the pipe body) is more and more, and then the space in the pipe body (or the pipeline connected below the pipe body) is compressed to promote the gas to move upwards, finally, the air pressure between the piston in the cylinder barrel and the first end of the cylinder barrel is gradually increased, when the air pressure is increased to a certain degree, the piston can be pushed to move, the piston can pull the valve core to one side close to the valve seat, until the liquid in the container (or the pool) is deep enough, the air pressure between the piston and the first end of the cylinder barrel is large enough to enable the valve core to be abutted against the valve seat, the water flow can be stopped, and the automatic closing of the valve is realized.

Therefore, after the valve disclosed by the invention is applied in the production process of chemical materials, the valve can be automatically cut off after the liquid in the container reaches a certain depth, so that a worker can carry out other work during liquid discharge and does not need to keep aside to wait for closing the valve; similarly, when the swimming pool uses the valve of the invention, the staff does not need to keep aside to wait for closing the valve when the water is discharged into the swimming pool.

It should be noted that, as the liquid in the container (or the tank) is deeper, the air pressure between the piston and the first end of the cylinder barrel is larger, so that a technician needs to calculate the pressure according to the required liquid depth in advance, and then designs the sizes of the components of the valve according to the calculated pressure and selects a proper elastic part, so that the more accurate control can be achieved, namely, when the liquid reaches the preset depth, the valve core can be abutted against the valve seat, and the liquid is blocked from being continuously put into the valve.

Further, the liquid inlet end of the valve body is provided with a section of first threads.

The first thread may be an external thread on the valve body or an internal thread for connecting the valve body to the liquid supply conduit.

Furthermore, one end of the pipe body, which is far away from the cylinder barrel, is provided with a section of second thread.

The second thread can be an external thread on the pipe body, and can also be an internal thread which is used for connecting the pipe body with the extension pipe below.

Furthermore, a second sealing ring is arranged on one side, close to the valve seat, of the valve core, and the second sealing ring is used for sealing a gap between the valve core and the valve seat when the valve core and the valve seat are abutted.

Further, the other end of the cylinder barrel in the axial direction is a second end, and the second end is also closed.

The second end is closed, so that the flowing liquid can be prevented from entering the cylinder barrel and influencing the movement of the piston.

Furthermore, the elastic element is a pressure spring, and is arranged in the inner cavity of the cylinder barrel, one end of the elastic element is abutted against the piston, and the other end of the elastic element is abutted against the second end of the cylinder barrel.

Furthermore, the piston rod axially penetrates through the first end of the cylinder barrel, and movable sealing connection is achieved at the penetrating position through a sealing ring arranged on the first end.

Such a sealing structure belongs to the mature technology, and the mode of sealing between the piston rod and the end cover in the cylinder in view of the prior art is used.

According to another aspect of the present invention, there is provided a container comprising a container body and the aforementioned valve which is automatically closed under the influence of pressure;

the valve is arranged at the top of the container body, the opening of the tube body of the valve extends to a position close to the bottom in the container body or an extension tube is connected below the tube body of the valve and extends to a position close to the bottom in the container body.

According to a further aspect of the present invention there is also provided a tank for holding a liquid, comprising a tank body and a valve as aforesaid which closes automatically under the influence of pressure;

the valve is arranged at the top of the tank body, the opening of the pipe body of the valve extends to the position close to the bottom in the tank body or an extension pipe is connected below the pipe body of the valve and extends to the position close to the bottom in the tank body.

The container or the pool is characterized in that the valve is used, so that after the valve is connected with the liquid supply pipeline, when liquid is put into the container (or the pool), the valve can be automatically closed when the amount of the liquid reaches a certain degree; therefore, when the liquid is discharged, the working personnel can go to perform other work without being kept aside to wait for closing the valve, and after the valve is automatically closed, the working personnel can close the liquid supply valve of the liquid supply pipeline at any time.

Drawings

FIG. 1 is a schematic view of the valve body of embodiment 1 when it is opened;

FIG. 2 is a schematic view of the valve body of embodiment 1 when closed;

FIG. 3 is a view showing example 2;

fig. 4 is an enlarged view within the dashed box in fig. 3.

Detailed Description

The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.

Example 1:

as shown in fig. 1, the present embodiment provides a valve 1 that is automatically closed by pressure, and includes a valve body 11, a valve seat 12, a valve element 13, an elastic member 14, and a pneumatic mechanism.

One end of the valve body 11 is a liquid inlet end 111, and the other end is a liquid outlet end 112.

The valve seat 12 is disposed in the inner cavity of the valve body 11.

The valve core 13 is disposed in the inner cavity of the valve body 11, and is used for abutting against the valve seat 12 to block the communication between the liquid inlet end 111 and the liquid outlet end 112 of the valve body 11.

The elastic element 14 directly or indirectly gives acting force to the valve core 13 to drive the valve core 13 to keep a distance with the valve seat 12.

The pneumatic mechanism 15 comprises a cylinder 151, a piston 152, a piston rod 153 and a pipe body 154; the cylinder 151 is arranged in the inner cavity of the valve body 11, and one end of the cylinder 151 in the axial direction is closed and is a first end 151 a; the piston 152 is arranged in the cylinder tube 151, and the piston 152 is attached to the inner cavity of the cylinder tube 151 in a sealing mode through a sealing ring 152 a; the piston rod 153 is arranged along the axial direction of the cylinder 151, one end of the piston rod 153 is connected with the piston 152, and the other end is connected with the valve core 13; one end of the tube 154 is connected to the inner cavity of the cylinder 151, and the connection is located between the piston 152 and the first end 151a of the cylinder 151, and the other end of the tube 154 has an opening 154a and is located outside the valve body 11.

When the air pressure between the piston 152 and the first end 151a of the cylinder 151 increases, the force applied to the piston 152 by the air pressure causes the piston 152 to pull the valve element 13 toward the valve seat 12; meanwhile, the valve element 12 is provided with a condition that the valve element 12 can move to a position where the valve element 12 abuts against the valve seat 12, that is, the valve element 12 is not hindered by other parts or structures and is not affected by the compression degree of the elastic member 14, so that the valve element 12 cannot abut against the valve seat 12.

Preferably, since the valve 1 of the present embodiment is connected to the end of the liquid supply pipe when in use, in order to ensure the connection with the liquid supply pipe, a first thread 113 is provided at the liquid inlet end 111 of the valve body 11, and the first thread 113 may be an internal thread or an external thread, as shown in fig. 1 by the internal thread.

Preferably, since the overall volume of the valve 1 is relatively small, the length of the pipe body 154 is set to be relatively short in the present embodiment, as shown in fig. 1. However, in use, the bottom of the tube body 154 needs to be connected to an extension pipe 3 to extend to a position near the bottom in the container (or pool), see fig. 3, so that in order to facilitate connection to the extension pipe 3, a second thread 154b is provided at the end of the tube body 154 away from the cylinder 151, and likewise, the second thread 154b may be an internal thread or an external thread, as shown in fig. 1 by the internal thread.

Furthermore, in order to ensure the sealing reliability of the valve 13 and the valve seat 12, a ring of second sealing ring 131 is arranged on the side of the valve core 13 close to the valve seat 12. When the valve core 13 is abutted against the valve seat 12, the second sealing ring 131 can seal the gap between the valve core and the valve seat, so that the leakage is avoided.

Preferably, since the water flowing into the valve 1 has a certain impact force or reverse flow force, the other end of the cylinder 151 in the axial direction, i.e., the second end 151b, is closed in order to prevent the water flow from affecting the movement of the piston 152.

The first end 151a and the second end 151b are sealed in the same manner as the two ends of the cylinder body in the prior art, and are sealed by end covers.

Preferably, the elastic element 14 is a compression spring, and is disposed in the inner cavity of the cylinder 151, and one end of the compression spring abuts against the piston 152, and the other end of the compression spring abuts against the second end 151b of the cylinder 151.

Of course, the pressure spring may be disposed outside the cylinder 151, and the valve element 13 and the first end 151a of the cylinder 151 are sleeved on the piston rod 153, and both ends of the pressure spring respectively abut against the valve element 13 and the first end 151 a.

Preferably, the piston rod 153 axially penetrates the first end 151a of the cylinder 151, and is movably and sealingly connected at the penetration by a sealing ring 151c disposed at the first end 151 a.

The sealing mode belongs to the mature technology and is consistent with the sealing mode between the piston rod and the end cover of the cylinder in the prior art.

The connection between the pipe body 154 and the valve body 11 is a sealing connection, if necessary.

Referring to fig. 3, the valve 1 of this embodiment is installed by installing it on the top of the container body 2, and then connecting an extension pipe 3 below the pipe body 154, and extending the extension pipe 3 into the container body 2 to a position near the bottom of the container body 2, wherein the bottom of the extension pipe 3 has an opening. Then, the liquid inlet end 111 of the valve body 11 is connected with the liquid supply pipeline 6, the front end of the liquid supply pipeline 6 is provided with a liquid supply valve 7, and liquid flowing out from the liquid outlet end 112 of the valve body 11 can flow into the container body 2.

In use, the liquid supply valve 7 of the liquid supply pipeline 6 is opened, and the valve 1 of the embodiment is opened because the valve core 13 is kept at a certain distance from the valve seat 12 under the action of the elastic element 14, so that liquid can directly flow through the valve 1 and then flow into the container body 2. A part of the liquid flowing into the container body 2 enters the extension pipe 3 from the bottom of the extension pipe 3, when the liquid in the container body 2 is deeper and deeper, the pressure at the bottom opening of the extension pipe 3 is higher and higher, so that the liquid in the extension pipe 3 is higher and higher, the liquid level in the extension pipe 3 is gradually raised, and therefore the space above the liquid level in the extension pipe 3 is gradually compressed (see fig. 4), and because the space is closed, the air pressure in the space is higher and higher, that is, the air pressure between the piston 152 and the first end 151a of the cylinder 151 is higher and higher, when the air pressure is increased to a certain degree, the piston 152 is pushed to move, the movement of the piston 152 pulls the valve core 13 to the side close to the valve seat 12 through the piston rod 153, until the liquid in the container body 2 is deep enough, the air pressure between the piston 152 and the first end 151a of the cylinder is high enough to make the valve core 13 collide with the valve seat 12 (see fig. 2), the water flow is stopped and the automatic closing of the valve 1 is achieved.

That is, when the valve 1 of the embodiment is used, the valve 1 is automatically cut off when the liquid in the container body 2 reaches a certain depth, and at this time, the liquid does not flow into the container body 2 continuously even if the liquid supply valve 7 of the liquid supply pipe 6 is not closed. Therefore, when the liquid is discharged, the worker can go to perform other work without being kept aside, and after the valve 1 is automatically closed, the worker returns to close the liquid supply valve 7 at the front end of the liquid supply pipeline 6 at any time.

It should be noted that, since the deeper the liquid in the container body 2 is, the greater the air pressure between the piston 152 and the first end 151a of the cylinder is, the technician needs to calculate the pressure according to the required liquid depth in advance, and then design the sizes of the components of the valve 1 and select the proper elastic member 14 according to the calculated pressures, so as to achieve more precise control, that is, when the liquid reaches the predetermined depth, the valve element 13 will abut against the valve seat 12, and the liquid will be blocked from flowing into the container body 2.

Example 2:

referring to fig. 3 and 4, the present embodiment provides a container including a container body 2 and the valve 1 of embodiment 1, which is automatically closed by the influence of pressure. The valve 1 is erected on the top of the container body 2, an extension pipe 3 is connected below a pipe body 154 of the valve 1, and the extension pipe 3 extends to a position close to the bottom in the container body 2.

More specifically, the pipe body 154 of the valve 1 is connected with the extension pipe 3 through the first adaptor 4, and both ends of the first adaptor 4 are provided with threads which can be respectively connected with the pipe body 154 and the extension pipe 3; the liquid inlet end 111 of the valve body 11 of the valve 1 is connected with the liquid supply pipeline 6 through a second adapter 5, and both ends of the second adapter 5 are provided with threads which can be respectively connected with the valve body 11 and the liquid supply pipeline 6; the front end of the liquid supply pipeline 6 is provided with a liquid supply valve 7.

Of course, the present embodiment may also abandon the extension pipe 3 and extend the pipe body 154 to make the opening 154a extend directly to the position near the bottom in the container body 2.

Example 3:

this embodiment is similar to embodiment 2 except that a pool (e.g., a swimming pool or a watering reservoir) is shown rather than a conventional container.

The present embodiment provides a tank for accumulating a liquid, comprising a tank body and the valve of embodiment 1, which is automatically closed under the influence of pressure, wherein the valve is arranged at the top of the tank body, the opening of the pipe body of the valve extends to a position near the bottom in the tank body, or an extension pipe is connected below the pipe body of the valve and extends to a position near the bottom in the tank body.

Claims (9)

1. A valve that automatically closes under the influence of pressure, comprising:

one end of the valve body (11) is a liquid inlet end (111), and the other end is a liquid outlet end (112);

a valve seat (12) arranged in the inner cavity of the valve body (11);

the valve core (13) is arranged in the inner cavity of the valve body (11) and is used for abutting against the valve seat (12) to block the communication of the liquid inlet end (111) and the liquid outlet end (112) of the valve body (11);

the elastic piece (14) directly or indirectly gives acting force to the valve core (13) to drive the valve core (13) to keep a distance with the valve seat (12);

the pneumatic mechanism (15), the pneumatic mechanism (15) includes a cylinder (151), a piston (152), a piston rod (153) and a pipe body (154); the cylinder barrel (151) is arranged in an inner cavity of the valve body (11), and one end of the cylinder barrel (151) in the axial direction is closed and is a first end (151 a); the piston (152) is arranged in the cylinder barrel (151), and the piston (152) is attached to the inner cavity of the cylinder barrel (151) in a sealing mode through a sealing ring (152 a); the piston rod (153) is arranged along the axial direction of the cylinder barrel (151), one end of the piston rod (153) is connected with the piston (152), and the other end of the piston rod is connected with the valve core (13); one end of the pipe body (154) is communicated with the inner cavity of the cylinder barrel (151), the communication position is positioned between the piston (152) and the first end (151a) of the cylinder barrel (151), and the other end of the pipe body (154) is provided with an opening (154a) and is positioned outside the valve body (11);

when the air pressure between the piston (152) and the first end (151a) of the cylinder (151) increases, the force applied to the piston (152) by the air pressure causes the piston (152) to pull the valve element (13) toward the valve seat (12).

2. A pressure-affected self-closing valve as claimed in claim 1, characterised in that the inlet end (111) of the valve body (11) is provided with a first thread (113).

3. A pressure-affected self-closing valve as claimed in claim 1, wherein the end of the tube (154) remote from the cylinder (151) is provided with a second thread (154 b).

4. A pressure-affected self-closing valve according to claim 1, characterized in that the valve element (13) is provided with a second sealing ring (131) on the side close to the valve seat (12), and the second sealing ring (131) is used for sealing the gap between the valve element (13) and the valve seat (12) when the valve element (13) and the valve seat (12) are in contact with each other.

5. A pressure-affected valve as claimed in claim 1, characterized in that the other end of the cylinder (151) in the axial direction is a second end (151b), and the second end (151b) is also closed.

6. A pressure-affected valve which closes automatically according to claim 5, characterised in that the spring element (14) is a compression spring which is arranged in the interior of the cylinder (151) and which has one end which bears against the piston (152) and the other end which bears against the second end (151b) of the cylinder (151).

7. A pressure-affected valve as claimed in claim 6, characterized in that the piston rod (153) extends axially through the first end (151a) of the cylinder (151) and is movably and sealingly connected at the first end (151a) by a sealing ring (151 c).

8. A container, characterized by comprising a container body (2) and a valve (1) according to any one of claims 1 to 8 which is automatically closed under the influence of pressure;

wherein, the valve (1) is arranged at the top of the container body (2), the opening (154a) of the tube body (154) of the valve (1) extends to a position close to the bottom in the container body (2) or an extension pipe (3) is connected below the tube body (154) of the valve (1), and the extension pipe (3) extends to a position close to the bottom in the container body (2).

9. A tank for accumulating a liquid, comprising a tank body and a pressure-affected valve as claimed in any one of claims 1 to 8;

the valve is arranged at the top of the tank body, the opening of the pipe body of the valve extends to the position close to the bottom in the tank body or an extension pipe is connected below the pipe body of the valve and extends to the position close to the bottom in the tank body.

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