A negative pressure compensation valve

Abstract

This invention belongs to the field of isotope separation technology, specifically relating to a negative pressure compensation valve. The invention includes a handle, a valve stem, a valve body, a negative pressure compensation chamber, an electromagnetic switch, a negative pressure compensation pipe, and a PLC. The valve body has a through hole in the middle and a negative pressure compensation chamber on the right side. The top of the through hole is sealed by a sealing body, and the valve stem is inserted into the sealing body. The through hole has a sealing port in the middle and an air inlet at the bottom. The negative pressure compensation chamber contains an electromagnetic switch, which is connected to the air inlet through the negative pressure compensation pipe. The PLC is located at the top of the negative pressure compensation chamber. This invention has functions such as shut-off, pressure detection, automatic negative pressure compensation, and alarm, and can be directly used in long-term material storage containers.

Description

Technical Field

[0001] This invention belongs to the field of isotope separation technology, and specifically relates to a negative pressure compensation valve. Background Technology

[0002] Currently, centrifuge plants use numerous containers to store working materials, and right-angle vacuum valves are employed to prevent leakage. However, over time, the pressure inside the container (a negative pressure far below atmospheric pressure) gradually balances with atmospheric pressure, leading to material leakage, economic losses, and environmental pollution. Therefore, it is necessary to design a negative pressure compensation valve that can promptly alarm when abnormal changes occur in the inlet pressure of the shut-off valve and automatically open the negative pressure balance chamber to compensate for pressure when the pressure change exceeds the limit, thus preventing material leakage. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a negative pressure compensation valve with functions such as shut-off, pressure detection, automatic negative pressure compensation, and alarm, which can be directly used in long-term material storage containers.

[0004] The technical solution adopted in this invention is as follows:

[0005] A negative pressure compensation valve includes a handle, a valve stem, a valve body, a negative pressure compensation chamber, an electromagnetic switch, a negative pressure compensation pipe, and a PLC. The valve body has a through hole in the middle and a negative pressure compensation chamber on the right side. The top of the through hole is sealed by a sealing body, and the valve stem is inserted into the sealing body. The through hole has a sealing port in the middle and an air inlet at the bottom. The electromagnetic switch is installed inside the negative pressure compensation chamber and is connected to the air inlet through the negative pressure compensation pipe. The PLC is installed at the top of the negative pressure compensation chamber.

[0006] The valve body has a through hole on the left side and a flange bolt at the bottom.

[0007] The sealing body has an internal thread, and the valve stem has an external thread. The external thread mates with the internal thread. The valve stem is inserted into the through hole from the top. The bottom of the valve stem has a sealing element, and the top is fixedly installed with a handle.

[0008] A pressure transmitter is connected to the lower side wall of the through hole via an instrument pressure tap.

[0009] The electromagnetic switch includes a magnet, a sealing gasket, a sealing port, a spring, and an electromagnet. The magnet passes through a negative pressure compensation tube. A sealing port is provided inside the negative pressure compensation tube and on the magnet, and is sealed by a sealing gasket. The lower end of the magnet is connected to the electromagnet by a spring.

[0010] A pressure transmitter is connected to the outer wall of the negative pressure compensation chamber via an instrument pressure tap.

[0011] The PLC is connected to the touch screen.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] (1) This invention provides a negative pressure compensation valve, which is suitable for negative pressure compensation of valves for long-term storage of materials in various occasions;

[0014] (2) The present invention provides a negative pressure compensation valve, which has the function of shutting off the container outlet;

[0015] (3) The present invention provides a negative pressure compensation valve, which has the function of detecting the sealing performance of the valve body and issuing an alarm. Attached Figure Description

[0016] Figure 1 This invention provides a schematic diagram of a negative pressure compensation valve structure;

[0017] Figure 2 This is a schematic diagram of an electromagnetic switch structure;

[0018] In the diagram: 1-Handle, 2-Valve stem, 3-External thread, 4-Valve body, 5-Internal thread, 6-Seal, 7-Cavity, 8-Sealing port, 9-Air inlet, 10-Flange bolt, 11-Instrument pressure tap, 12-Pressure transmitter, 13-Negative pressure compensation chamber, 14-Solenoid switch, 15-Negative pressure compensation pipe, 16-Touch screen, 17-PLC, 19-Magnet, 20-Sealing gasket, 21-Sealing port, 22-Spring, 23-Electromagnet. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] like Figure 1 As shown, this invention provides a negative pressure compensation valve, including a handle 1, a valve stem 2, an external thread 3, a valve body 4, an internal thread 5, a seal 6, a cavity 7, a sealing port 8, an air inlet 9, flange bolts 10, an instrument pressure tapping pipe 11, a pressure transmitter 12, a negative pressure compensation cavity 13, an electromagnetic switch 14, a negative pressure compensation pipe 15, a touch screen 16, and a PLC 17. The valve body 4 has a through hole in the middle, a negative pressure compensation cavity 13 on the right side, a through hole on the left side, and flange bolts 10 at the bottom. The top of the through hole is sealed, and the sealing body... The valve stem 2 has an internal thread 5 and an external thread 3, which mates with the internal thread 5. The valve stem 2 is inserted into the through hole from the top. The bottom of the valve stem 2 has a sealing element 6, and the top is fixedly mounted with a handle 1. The middle of the through hole has a sealing port 8, and the lower part is an air inlet 9. A pressure transmitter 12 is connected to the lower side wall of the through hole through an instrument pressure pipe 11. The negative pressure compensation chamber 13 has an electromagnetic switch 14 inside, and the electromagnetic switch 14 is connected to the air inlet 9 through a negative pressure compensation pipe 15. Figure 2 As shown, the electromagnetic switch 14 includes a magnet 19, a sealing gasket 20, a sealing port 21, a spring 22, and an electromagnet 23. The magnet 19 passes through the negative pressure compensation tube 15. A sealing port 21 is provided on the magnet 19 inside the negative pressure compensation tube 15 and is sealed by the sealing gasket 20. The lower end of the magnet 19 is connected to the electromagnet 23 by the spring 22. A pressure transmitter 12 is connected to the outer wall of the negative pressure compensation chamber 13 by an instrument pressure pipe 11. A PLC 17 is provided at the upper part of the negative pressure compensation chamber 13 and is connected to the touch screen 16.

[0023] A magnet is installed on the negative pressure compensation pipe through an opening, and a sealing gasket is bolted to the magnet. A spring is attached to the bottom of the magnet by binding, and the other end of the spring is connected to an electromagnet. The electromagnet is installed at the bottom of the negative pressure compensation chamber by welding.

[0024] When the valve is in operation, the handle is turned, which drives the valve stem downward through the thread, thus opening the valve. Figure 1The sealing element 6 and the sealing port 8 close together, cutting off the valve inlet and valve cavity. A pressure-sensing copper pipe is installed inside the inlet by welding, connecting to an external pressure transmitter. A negative pressure compensation cavity is set inside the valve body, and a negative pressure compensation pipe is connected to the inlet by welding. An electromagnetic switch is installed inside the negative pressure compensation pipe to cut off the channel. A pressure-sensing copper pipe is connected inside the negative pressure compensation pipe by welding, and a pressure transmitter is installed on the outside. A PLC and a miniature touch screen are installed on the left side of the valve body by bolt connection; the PLC has a built-in buzzer.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A negative pressure compensation valve, characterized in that, The valve body includes a handle (1), a valve stem (2), a valve body (4), a negative pressure compensation chamber (13), an electromagnetic switch (14), a negative pressure compensation pipe (15), and a PLC (17). The valve body (4) has a through hole in the middle and a negative pressure compensation chamber (13) on the right side. The top of the through hole is sealed by a sealing body, and the valve stem (2) is inserted into the sealing body. The through hole has a sealing port (8) in the middle and an air inlet (9) at the bottom. The negative pressure compensation chamber (13) is equipped with an electromagnetic switch (14), which is connected to the air inlet (9) through the negative pressure compensation pipe (15). The negative pressure compensation chamber (13) is equipped with a PLC (17) at the top. The sealing body is equipped with an internal screw thread. The valve stem (2) is provided with an external thread (3), which is engaged with the internal thread (5). The valve stem (2) is inserted into the through hole from the top. The valve stem (2) is provided with a sealing element (6) at the bottom and a handle (1) is fixedly installed at the top. The electromagnetic switch (14) includes a magnet (19), a sealing gasket (20), a sealing port (21), a spring (22), and an electromagnet (23). The magnet (19) passes through the negative pressure compensation pipe (15). A sealing port (21) is provided on the magnet (19) inside the negative pressure compensation pipe (15) and sealed by the sealing gasket (20). The lower end of the magnet (19) is connected to the electromagnet (23) by the spring (22).

2. The negative pressure compensation valve according to claim 1, characterized in that, The valve body (4) has a through hole on the left side and a flange bolt (10) at the bottom.

3. The negative pressure compensation valve according to claim 1, characterized in that, A pressure transmitter (12) is connected to the lower side wall of the through hole via an instrument pressure tap (11).

4. The negative pressure compensation valve according to claim 1, characterized in that, A pressure transmitter (12) is connected to the outer wall of the negative pressure compensation chamber (13) via an instrument pressure tap (11).

5. The negative pressure compensation valve according to claim 1, characterized in that, The PLC (17) is connected to the touch screen (16).

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