A valve that automatically closes under pressure

Abstract

The invention discloses a valve that can be applied to the production process of chemical materials and can be automatically closed under the influence of pressure, including a valve body, a valve seat, a valve core, an elastic member and a pneumatic mechanism; the valve seat and the valve core are arranged in the valve body, and the valve core is used to contact with the valve seat to close the valve; the elastic member drives the valve core to maintain a distance with the valve seat; the pneumatic mechanism includes a cylinder, a piston, a piston rod and a tube body, the cylinder is arranged in the valve body, the first end of the cylinder is closed, the piston is arranged in the cylinder, one end of the piston rod is connected to the piston, and the other end is connected to the valve core, one end of the tube body is connected to the inner cavity of the cylinder, and the connection is located between the piston and the first end of the cylinder, the other end of the tube body is open and located outside the valve body, and when the air pressure between the piston and the first end of the cylinder increases, the valve core will move to the side of the valve seat. After using this valve, the valve will automatically cut off when the liquid in the container reaches a certain depth, so the staff can do other work when the liquid is discharged, and there is no need to stay aside.

Description

Technical Field

[0001] The present invention relates to the field of valves, and in particular to a valve which can be automatically closed under the influence of pressure. Background Art

[0002] When putting liquid materials into a container through a pipeline, someone usually needs to wait by the side, waiting for the liquid to reach the specified position, and then shut off the valve to stop discharging the liquid. For example, in the production process of chemical materials, liquid materials often need to be placed in containers for storage. During this process, the valve will not close automatically when the liquid level reaches the specified position. Therefore, a dedicated person is required to wait by the side and manually close the valve once the material is full. However, when the container for storing materials is large, the time for discharging the material will be longer, so the time for workers to wait by the side will also be very long, which will not only delay the normal work of the staff, but also the staff will not be able to generate any labor value while waiting. In this regard, if a valve that automatically cuts off when the liquid level reaches a specified height can be designed, then the staff can be "liberated" and can do other work without waiting by the container waiting for the valve to be closed. Summary of the invention

[0003] The purpose of the present invention is to provide a valve that will automatically close under the influence of pressure. When the valve is installed on the top of a container (or pool), and the volume of the container (or pool) is relatively large, when liquid is put into the container (or pool), when the amount of liquid reaches a certain level, the valve can automatically close without the need for manual closure.

[0004] To achieve the above object, according to one aspect of the present invention, there is provided a valve that automatically closes under the influence of pressure, comprising:

[0005] The valve body has a liquid inlet at one end and a liquid outlet at the other end;

[0006] A valve seat, disposed in the inner cavity of the valve body;

[0007] A valve core is disposed in the inner cavity of the valve body and is used to abut against the valve seat to block the communication between the liquid inlet end and the liquid outlet end of the valve body;

[0008] The elastic part directly or indirectly exerts force on the valve core to drive the valve core to maintain a distance from the valve seat;

[0009] A pneumatic mechanism, comprising a cylinder, a piston, a piston rod and a tube body; the cylinder is arranged in the inner cavity of the valve body, and one end of the cylinder in the axial direction is closed, which is the first end; the piston is arranged in the cylinder, and the piston is sealed and fitted with the inner cavity of the cylinder through a sealing ring; the piston rod is arranged along the axial direction of the cylinder, one end of the piston rod is connected to the piston, and the other end is connected to the valve core; one end of the tube body is connected to the inner cavity of the cylinder, and the connection point is located between the piston and the first end of the cylinder, and the other end of the tube body is open and located outside the valve body;

[0010] Furthermore, when the air pressure between the piston and the first end of the cylinder increases, the force exerted by the air pressure on the piston causes the piston to pull the valve core toward a side close to the valve seat.

[0011] When installing the valve of the present invention, it can be installed on the top of the container (or pool), and then the pipe body (or the extension pipe connected below the pipe body) is extended into the container (or pool) and extended to a position close to the bottom of the container (or pool); then, the liquid inlet end of the valve body is connected to the liquid supply pipeline, and a liquid supply valve is provided on the liquid supply pipeline, and at the same time, the liquid flowing out of the liquid outlet end can flow into the container (or pool);

[0012] When in use, the liquid supply valve of the liquid supply pipeline is opened. At this time, due to the action of the elastic member, there is a distance between the valve core and the valve seat, so the valve of the present invention is open, so the liquid can directly pass through the valve and then flow into the container (or pool); when the liquid in the container (or pool) becomes more and more, the liquid entering the valve body (or the pipeline connected below the tube body) will also become more and more, which will compress the space in the tube body (or the pipeline connected below the tube body), prompting the gas to move upward, and finally causing the air pressure between the piston in the cylinder and the first end of the cylinder to gradually increase. When the air pressure increases to a certain extent, it will push the piston to move, and the piston will pull the valve core to the side close to the valve seat until the liquid in the container (or pool) is deep enough, and the air pressure between the piston and the first end of the cylinder is so large that the valve core hits the valve seat, the water flow will stop, thereby realizing the automatic closing of the valve.

[0013] It can be seen that after the valve of the present invention is used in the production process of chemical materials, the valve will automatically cut off when the liquid in the container reaches a certain depth. Therefore, when the liquid is released, the staff can do other work without having to wait by the side for the valve to be closed; similarly, after the valve of the present invention is used in the swimming pool, when water is released into the swimming pool, the staff does not have to wait by the side for the valve to be closed.

[0014] It should be noted that the deeper the liquid in the container (or pool), the greater the air pressure between the piston and the first end of the cylinder. Therefore, technicians need to calculate the pressure in advance according to the required liquid depth, and then design the dimensions of each valve component and select appropriate elastic parts accordingly, so as to achieve more precise control. That is, when the liquid reaches the predetermined depth, the valve core will contact the valve seat, blocking the further introduction of liquid.

[0015] Furthermore, the liquid inlet end of the valve body is provided with a first thread.

[0016] The first thread may be an external thread located on the valve body, or an internal thread, and is used to connect the valve body to the liquid supply pipeline.

[0017] Furthermore, a second thread is provided at one end of the tube away from the cylinder.

[0018] The second thread may be an external thread on the tube body or an internal thread, and is used to connect the tube body to the extension tube below.

[0019] Furthermore, a second sealing ring is provided on a side of the valve core close to the valve seat, and the second sealing ring is used to seal a gap between the valve core and the valve seat when the valve core and the valve seat are in conflict with each other.

[0020] Furthermore, the other end of the cylinder in the axial direction is the second end, and the second end is also closed.

[0021] Closing the second end can prevent the flowing liquid from entering the cylinder and affecting the movement of the piston.

[0022] Furthermore, the elastic member is a compression spring, which is arranged in the inner cavity of the cylinder, and one end of which abuts against the piston and the other end of which abuts against the second end of the cylinder.

[0023] Furthermore, the piston rod axially penetrates the first end of the cylinder barrel, and a movable sealing connection is achieved at the penetration point by a sealing ring arranged on the first end.

[0024] Such a sealing structure is a mature technology, which is based on the sealing method between the piston rod and the end cover in the cylinder of the prior art.

[0025] According to another aspect of the present invention, there is provided a container, which comprises a container body and the aforementioned valve that automatically closes under the influence of pressure;

[0026] Wherein, the valve is arranged at the top of the container body, and the opening of the valve tube body extends to a position near the bottom of the container body, or an extension tube is connected below the valve tube body, and the extension tube extends to a position near the bottom of the container body.

[0027] According to another aspect of the present invention, there is also provided a pool for accumulating liquid, which comprises a pool body and the aforementioned valve that automatically closes under the influence of pressure;

[0028] Wherein, the valve is arranged on the top of the pool body, and the opening of the valve tube body extends to a position near the bottom of the pool body, or an extension tube is connected below the valve tube body, and the extension tube extends to a position near the bottom of the pool body.

[0029] Since the above-mentioned container or pool uses the above-mentioned valve, after the valve is connected to the liquid supply pipeline, when liquid is put into the container (or pool), the valve will automatically close when the amount of liquid reaches a certain level; therefore, when the liquid is released, the staff can do other work without waiting to close the valve. After the valve is automatically closed, the staff can close the liquid supply valve of the liquid supply pipeline at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the structure when the valve core is opened in Example 1;

[0031] Figure 2 is a schematic diagram of the structure when the valve core is closed in Example 1;

[0032] Figure 3 It is a display diagram of Example 2;

[0033] Figure 4 yes Figure 3 Enlarged view within the dashed box. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0035] Embodiment 1:

[0036] like Figure 1 As shown, this embodiment provides a valve 1 that automatically closes under the influence of pressure, which includes a valve body 11, a valve seat 12, a valve core 13, an elastic member 14 and a pneumatic mechanism.

[0037] One end of the valve body 11 is a liquid inlet end 111 , and the other end is a liquid outlet end 112 .

[0038] The valve seat 12 is disposed in the inner cavity of the valve body 11 .

[0039] The valve core 13 is disposed in the inner cavity of the valve body 11 , and is used to abut 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 .

[0040] The elastic member 14 directly or indirectly exerts a force on the valve core 13 to drive the valve core 13 to maintain a distance from the valve seat 12 .

[0041] The pneumatic mechanism 15 includes a cylinder 151, a piston 152, a piston rod 153 and a tube 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, which is the first end 151a; the piston 152 is arranged in the cylinder 151, and the piston 152 is sealed with the inner cavity of the cylinder 151 through a sealing ring 152a; the piston rod 153 is arranged along the axial direction of the cylinder 151, one end of the piston rod 153 is connected to the piston 152, and the other end is connected to the valve core 13; one end of the tube 154 is connected to the inner cavity of the cylinder 151, and the connection point 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.

[0042] Furthermore, when the air pressure between the piston 152 and the first end 151a of the cylinder 151 increases, the force exerted by the air pressure on the piston 152 will cause the piston 152 to pull the valve core 13 toward the side close to the valve seat 12; at the same time, the valve core 12 is able to move to a position that conflicts with the valve seat 12, that is, the valve core 12 will not be hindered by other components or structures, nor will it be affected by the degree of compression of the elastic member 14, resulting in a situation where the valve core 12 cannot conflict with the valve seat 12.

[0043] Preferably, since the valve 1 of this embodiment is connected to the end of the liquid supply pipeline when in use, in order to ensure that it can be connected to the liquid supply pipeline, a first thread 113 is provided at the liquid inlet end 111 of the valve body 11, and the first thread 113 can be an internal thread or an external thread. Figure 1 Internal threads are used for demonstration.

[0044] Preferably, in order to make the overall volume of the valve 1 relatively small, the length of the tube body 154 is set to be relatively short in this embodiment. Figure 1 However, when in use, the bottom of the tube body 154 needs to be connected to an extension tube 3 to extend to a position near the bottom of the container (or pool), see Figure 3 Therefore, in order to facilitate connection with the extension tube 3, a second thread 154b is provided at one end of the tube body 154 away from the cylinder 151. Similarly, the second thread 154b can be an internal thread or an external thread. Figure 1 Internal threads are used for demonstration.

[0045] Furthermore, in order to ensure the reliability of the sealing between the valve 13 and the valve seat 12, a second sealing ring 131 is provided on the side of the valve core 13 close to the valve seat 12. When the valve core 13 and the valve seat 12 collide, the second sealing ring 131 can seal the gap between them to avoid leakage.

[0046] Preferably, since the water flowing into the valve 1 has a certain impact force or backflow force, in order to prevent the water flow from affecting the movement of the piston 152, the other end of the cylinder 151 in the axial direction, namely the second end 151b, is closed.

[0047] The first end 151a and the second end 151b are sealed in the same manner as the two ends of a cylinder body in the prior art, and both are sealed with end covers.

[0048] Preferably, the elastic member 14 is a compression spring, which is disposed in the inner cavity of the cylinder 151 , with one end abutting against the piston 152 , and the other end abutting against the second end 151 b of the cylinder 151 .

[0049] Of course, the compression spring can also be arranged outside the cylinder 151, between the valve core 13 and the first end 151a of the cylinder 151 and sleeved on the piston rod 153, and at both ends respectively abut against the valve core 13 and the first end 151a.

[0050] Preferably, the piston rod 153 axially penetrates the first end 151a of the cylinder 151, and a movable sealing connection is achieved at the penetration point by a sealing ring 151c arranged on the first end 151a.

[0051] The above sealing method is a mature technology and is consistent with the sealing method between the cylinder piston rod and the end cover in the prior art.

[0052] Necessarily, the connection between the tube body 154 and the valve body 11 is a sealed connection.

[0053] See also Figure 3 When installing the valve 1 of this embodiment, it is necessary to install it on the top of the container body 2, and then connect an extension tube 3 below the tube body 154, and extend the extension tube 3 into the container body 2 and extend to a position close to the bottom of the container body 2, and the bottom of the extension tube 3 has an opening. After that, the liquid inlet end 111 of the valve body 11 is connected to the liquid supply pipeline 6, and a liquid supply valve 7 is set at the front end of the liquid supply pipeline 6, so that the liquid flowing out of the liquid outlet end 112 of the valve body 11 can flow into the container body 2.

[0054] When in use, the liquid supply valve 7 of the liquid supply pipe 6 is opened. At this time, due to the action of the elastic member 14, the valve core 13 and the valve seat 12 maintain a certain distance, so the valve 1 of this embodiment is open, so the 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 will enter the extension tube 3 from the bottom of the extension tube 3. When the liquid in the container body 2 becomes deeper and deeper, the pressure at the opening at the bottom of the extension tube 3 will also become greater and greater. Therefore, more and more liquid will enter the extension tube 3, and the liquid level in the extension tube 3 will gradually rise. Therefore, the space above the liquid level in the extension tube 3 will be gradually compressed (see Figure 4 ), and since the space is closed, the air pressure in the space will become larger and larger, that is, the air pressure between the piston 152 in the cylinder 151 and the first end 151a of the cylinder will become larger and larger. When the air pressure increases to a certain extent, the piston 152 will be pushed to move, and the movement of the piston 152 will pull 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, and the air pressure between the piston 152 and the first end 151a of the cylinder is large enough to make the valve core 13 hit the valve seat 12 (see Figure 2 ), the water flow will stop, thus achieving automatic closing of valve 1.

[0055] That is, after the valve 1 of the embodiment is used, when the liquid in the container body 2 reaches a certain depth, the valve 1 will be automatically cut off, and at this time, even if the liquid supply valve 7 on the liquid supply pipe 6 is not closed, the liquid will not continue to flow into the container body 2. Therefore, when the liquid is discharged, the staff can do other work without having to stay aside, and after the valve 1 is automatically closed, the staff can come back at any time to close the liquid supply valve 7 at the front end of the liquid supply pipe 6.

[0056] It should be noted that the deeper the liquid in the container body 2, the greater the air pressure between the piston 152 and the first end 151a of the cylinder, so the technician needs to calculate the pressure in advance according to the required liquid depth, and then design the dimensions of the various components of the valve 1 accordingly and select a suitable elastic member 14, so as to achieve more precise control, that is, when the liquid reaches a predetermined depth, the valve core 13 will contact the valve seat 12, blocking the liquid from continuing to flow into the container body 2.

[0057] Embodiment 2:

[0058] See also Figure 3 and Figure 4 As shown, this embodiment provides a container, which includes a container body 2 and a valve 1 that automatically closes under pressure of embodiment 1. The valve 1 is mounted on the top of the container body 2, and an extension tube 3 is connected below the tube body 154 of the valve 1, and the extension tube 3 extends to a position near the bottom of the container body 2.

[0059] More specifically, the tube body 154 of the valve 1 is connected to the extension tube 3 through the first connector 4, and both ends of the first connector 4 have threads, which can be connected to the tube body 154 and the extension tube 3 respectively; the liquid inlet end 111 of the valve body 11 of the valve 1 is connected to the liquid supply pipe 6 through the second connector 5, and both ends of the second connector 5 have threads, which can be connected to the valve body 11 and the liquid supply pipe 6 respectively; a liquid supply valve 7 is provided at the front end of the liquid supply pipe 6.

[0060] Of course, in this embodiment, the extension tube 3 can be discarded, and the tube body 154 itself can be extended so that the opening 154 a directly extends to a position near the bottom of the container body 2 .

[0061] Embodiment 3:

[0062] This embodiment is similar to embodiment 2, except that what is shown is a pool (such as a swimming pool or a water reservoir for irrigation) rather than an ordinary container.

[0063] This embodiment provides a pool for storing liquid, which includes a pool body and the valve of Example 1 that automatically closes under the influence of pressure. The valve is arranged on the top of the pool body, and the opening of the valve body extends to a position near the bottom of the pool body or an extension pipe is connected to the bottom of the valve body, and the extension pipe extends to a position near the bottom of the pool body.

Claims

1. A valve that automatically closes under pressure, characterized in that: include: A valve body (11), one end of which is a liquid inlet end (111) and the other end of which is a liquid outlet end (112); A valve seat (12) is arranged in the inner cavity of the valve body (11); A valve core (13) is arranged in the inner cavity of the valve body (11) and is used to abut 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 member (14) directly or indirectly exerts a force on the valve core (13) to drive the valve core (13) to maintain a distance from the valve seat (12); A pneumatic mechanism (15), the pneumatic mechanism (15) comprising a cylinder (151), a piston (152), a piston rod (153) and a tube (154); the cylinder (151) is arranged in the inner cavity of the valve body (11), one end of the cylinder (151) in the axial direction is closed, which is the first end (151a); the piston (152) is arranged in the cylinder (151), and the piston (152) is sealed and fitted with the inner cavity of the cylinder (151) via a sealing ring (152a); The piston rod (153) is arranged along the axial direction of the cylinder (151), one end of the piston rod (153) is connected to the piston (152), and the other end is connected to the valve core (13); one end of the tube body (154) is connected to the inner cavity of the cylinder (151), and the connection point is located between the piston (152) and the first end (151a) of the cylinder (151); the other end of the tube body (154) has an opening (154a) and is located outside the valve body (11); Furthermore, when the air pressure between the piston (152) and the first end (151a) of the cylinder (151) increases, the force exerted by the air pressure on the piston (152) causes the piston (152) to pull the valve core (13) toward a side close to the valve seat (12); When the opening (154a) of the tube body (154) is connected to the bottom area of ​​the container or the pool, and the liquid entering the valve body (11) flows out from the liquid outlet (112) and then flows into the container or the pool, the air pressure between the piston (152) and the first end (151a) of the cylinder (151) will gradually increase as the liquid level in the container or the pool rises, until the air pressure increases to drive the valve core (13) to collide with the valve seat (12), and the liquid outlet (112) stops flowing out of the liquid.

2. A valve that automatically closes under pressure according to claim 1, characterized in that: The liquid inlet end (111) of the valve body (11) is provided with a first thread (113).

3. A valve that automatically closes under pressure according to claim 1, characterized in that: A second thread (154b) is provided at one end of the tube (154) away from the cylinder (151).

4. A valve that automatically closes under pressure according to claim 1, characterized in that: The valve core (13) is provided with a second sealing ring (131) on one side close to the valve seat (12), and the second sealing ring (131) is used to seal the gap between the valve core (13) and the valve seat (12) when the two are in conflict.

5. A valve that automatically closes under pressure according to 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 valve that automatically closes under pressure according to claim 5, characterized in that: The elastic member (14) is a compression spring, which is arranged in the inner cavity of the cylinder (151), with one end abutting against the piston (152) and the other end abutting against the second end (151b) of the cylinder (151).

7. A valve that automatically closes under pressure according to claim 6, characterized in that: The piston rod (153) axially penetrates the first end (151a) of the cylinder (151), and a movable sealing connection is achieved at the penetration point by a sealing ring (151c) arranged on the first end (151a).

8. A container, characterized in that: It comprises a container body (2) and a valve (1) that automatically closes under the influence of pressure as claimed in any one of claims 1 to 7; The valve (1) is arranged at the top of the container body (2), and the opening (154a) of the tube body (154) of the valve (1) extends to a position near the bottom of the container body (2), or an extension tube (3) is connected below the tube body (154) of the valve (1), and the extension tube (3) extends to a position near the bottom of the container body (2).

9. A pool for storing liquid, characterized in that: A tank body and a valve that automatically closes under pressure as claimed in any one of claims 1 to 7; Wherein, the valve is arranged on the top of the pool body, and the opening of the valve tube body extends to a position near the bottom of the pool body, or an extension tube is connected below the valve tube body, and the extension tube extends to a position near the bottom of the pool body.

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