A self-evacuating valve

Abstract

This invention belongs to the field of isotope separation technology, specifically relating to a self-evacuating valve. The invention includes a valve stem, valve body, sealing element, cavity, sealing port, air inlet, and self-evacuating gauge. The valve body has a through hole in its center. The valve stem is mounted at the top of the through hole. A sealing element is installed below the valve stem and on the inner wall of the through hole. The lower part of the sealing element forms a cavity, and the bottom of the cavity has a sealing port. The air inlet is located below the sealing port. A horizontal through hole is formed on the side wall of the valve body, and a self-evacuating gauge is installed at the top of the through hole. This invention has functions such as shut-off and self-evacuation, and can be directly used for self-evacuation of pipeline valves.

Description

Technical Field

[0001] This invention belongs to the field of isotope separation technology, specifically relating to a self-evacuating valve. Background Technology

[0002] Currently, centrifuge plants are equipped with numerous pressure tapping valves for connecting pipeline instruments and intelligent analyzers. However, due to prolonged use, impurities such as air and reactants accumulate within the valve bodies, affecting not only their lifespan but also posing safety hazards to the control of parameters within the main process pipelines. Current solutions primarily involve bypassing the process pipelines and evacuating them offline, or disassembling the valves to purify their internal working environment. However, this method causes significant disturbance to the main process system. Therefore, it is necessary to design a self-evacuating valve that can directly evacuate the pipeline. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a self-vacuuming valve design method, which has functions such as shut-off and self-vacuuming, and can be directly used for pipeline valve self-vacuuming.

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

[0005] A self-evacuating valve includes a valve stem, a valve body, a seal, a cavity, a sealing port, an air inlet, and a self-evacuating gauge. The valve body has a through hole in the middle, the valve stem is installed at the top of the through hole, the seal is installed below the valve stem and on the inner wall of the through hole, the lower part of the seal is a cavity, the bottom of the cavity has a sealing port, and the lower part of the sealing port is an air inlet. The side wall of the valve body has a horizontal through hole, and a self-evacuating gauge is installed at the top of the through hole.

[0006] The valve body is equipped with flange bolts at the bottom.

[0007] The valve stem has an external thread, and the inner wall of the top of the through hole has an internal thread. The external thread and the internal thread are engaged, and a handle is installed on the top of the valve stem.

[0008] The sealing element includes a polyurethane gasket, a cast copper plug, and a polytetrafluoroethylene (PTFE) sealing ring. The polyurethane gasket is installed between the valve stem and the valve body. A cast copper plug is installed at the bottom of the valve stem, and a PTFE sealing ring is fitted onto the cast copper plug.

[0009] Above the horizontal through hole are two vertical through holes. The top of the first vertical through hole is fitted with a pipeline instrument via an instrument connector; the second vertical through hole is fitted with a miniature vacuum pump via a sealing pin.

[0010] The instrument connector (11) includes an instrument connecting pipe, a valve body connecting pipe, a stepped sealing port, and a sealing buckle. The instrument connecting pipe and the valve body connecting pipe are installed in the sealing buckle. The head of the instrument connecting pipe and the valve body connecting pipe located in the sealing buckle is provided with a stepped sealing port.

[0011] A miniature PLC is installed on the valve body.

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

[0013] (1) This invention provides a self-evacuation valve, which is suitable for self-evacuation of pipeline valves in various occasions;

[0014] (2) The present invention provides a self-evacuating valve that has the function of shutting off instrument pressure lines;

[0015] (3) The present invention provides a self-evacuating valve with the function of automatically adjusting the pressure of the internal cavity of the valve. Attached Figure Description

[0016] Figure 1 This invention provides a schematic diagram of a self-evacuating valve structure;

[0017] Figure 2 This is a schematic diagram of the sealing component structure;

[0018] Figure 3 This is a schematic diagram of the instrument connector structure;

[0019] 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 connector, 12-Pipeline instrument, 13-Self-evacuating gauge, 14-Miniature PLC, 15-Miniature vacuum pump, 16-Sealing pin, 19-Polyurethane gasket, 20-Cast copper plug, 21-PTFE sealing ring, 22-Instrument connecting pipe, 23-Valve body connecting pipe, 24-Stepped sealing port, 25-Sealing buckle. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] like Figure 1 As shown, this invention provides a self-evacuating 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, a flange bolt 10, an instrument connector 11, a pipeline instrument 12, a self-evacuating gauge 13, a micro PLC 14, a micro vacuum pump 15, and a sealing pin 16. The valve body 4 has a through hole in the middle and a flange bolt 10 at the bottom. The valve stem 2 is mounted on the top of the through hole and has an external thread 3. The inner wall of the top of the through hole has an internal thread 5, and the external thread 3 mates with the internal thread 5. A handle 1 is mounted on the top of the valve stem 2. A seal 6 is mounted below the valve stem 2 on the inner wall of the through hole. Figure 2 As shown, the sealing element 6 includes a polyurethane sealing gasket 19, a cast copper plug 20, and a polytetrafluoroethylene sealing ring 21. The polyurethane sealing gasket 19 is installed between the valve stem 2 and the valve body 4. The cast copper plug 20 is installed at the bottom of the valve stem 2, and the polytetrafluoroethylene sealing ring 21 is fitted onto the cast copper plug 20. The lower part of the sealing element 6 is a cavity 7, and the bottom of the cavity 7 is provided with a sealing port 8. Below the sealing port 8 is an air inlet 9. The side wall of the valve body 4 has a horizontal through hole, and a self-evacuation gauge 13 is installed at the top of the through hole. Above the horizontal through hole are two vertical through holes. The top of the first vertical through hole is connected to an instrument 12 via an instrument connector 11. The second vertical through hole is connected to a miniature vacuum pump 15 via a sealing pin 16. Figure 3As shown, the instrument connector 11 includes an instrument connecting pipe 22, a valve body connecting pipe 23, a stepped sealing port 24, and a sealing buckle 25. The instrument connecting pipe 22 and the valve body connecting pipe 23 are installed in the sealing buckle 25. The head of the instrument connecting pipe 22 and the valve body connecting pipe 23 located in the sealing buckle 25 is provided with a stepped sealing port 24. A micro PLC 14 is installed on the valve body 4.

[0024] Based on the pipeline structure and instrument pressure requirements, the self-evacuation valve is designed with a bottom inlet 9 for air intake and an upper instrument connector 11 for air outlet. A manual screw controls the opening and closing of the seal 6 and sealing port 8 to achieve the valve's shut-off function. The self-evacuation gauge and pipeline instruments are placed in the same equilibrium chamber via the pipeline instrument connector and the self-evacuation gauge connector, enabling self-evacuation (comparing to the same pressure value). A miniature vacuum pump is connected to the valve cavity via welding as a pressure source. A sealing pin is installed at the vacuum pump inlet to shut off the connection between the vacuum pump and the valve cavity.

[0025] During the movement of the valve stem, a polyurethane gasket is used to seal the valve stem and valve body; at the sealing port, a cast copper plug with a polytetrafluoroethylene sealing ring is used to cut off the valve cavity from the air inlet.

[0026] To conduct pipeline valve self-evacuation, first, use seal 6 to cut off sealing port 8. Place pipeline instruments, self-evacuation gauge, and vacuum pump in the same pressure chamber to sense the same pressure value, creating the basic conditions for self-evacuation. A miniature PLC with a built-in touchscreen is bolted to the valve body.

[0027] The parameters of pipeline instruments 12, self-evacuation instrument 13, micro vacuum pump 15, and sealing pin 16 during the self-evacuation process are collected and controlled by micro PLC 14.

[0028] 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.

[0029] 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 self evacuating valve characterized by, The utility model relates to a pipeline valve self-evacuation table, including valve stem (2), valve body (4), sealing element (6), cavity (7), sealing mouth (8), air inlet (9), self-evacuation table (13), the middle part of valve body (4) is equipped with through hole, valve stem (2) is installed at the top of through hole, the lower of valve stem (2), the inner wall of through hole is equipped with sealing element (6), the lower part of sealing element (6) is cavity (7), the bottom of cavity (7) is equipped with sealing mouth (8), the lower of sealing mouth (8) is air inlet (9), the lateral wall of valve body (4) is opened with horizontal through hole, and the top of horizontal through hole is equipped with self-evacuation table (13), The upper of horizontal through hole is opened with two vertical through holes, and the top of first vertical through hole is equipped with pipeline instrument (12) through instrument connecting piece (11), and the second vertical through hole is equipped with micro vacuum pump (15) through sealing pin (16), Micro PLC (14) is installed on valve body (4), Develop pipeline valve self-evacuation work, first use sealing element (6) to cut off sealing mouth (8), place pipeline instrument, self-evacuation table, vacuum pump in same pressure cavity, feel same pressure value, create self-evacuation basic condition, Micro PLC (14) is collected, control pipeline instrument (12) parameter, self-evacuation table (13) parameter, micro vacuum pump (15), sealing pin (16) in self-evacuation process.

2. The self-purging valve of claim 1, wherein, The bottom of valve body (4) is equipped with flange bolt (10).

3. The self-purging valve of claim 1, wherein, Valve stem (2) is equipped with outer thread (3), the inner wall of the top of through hole is equipped with inner thread (5), outer thread (3) cooperates with inner thread (5), and the top of valve stem (2) is equipped with handle (1).

4. The self-purging valve of claim 1, wherein, Sealing element (6) includes polyurethane sealing gasket (19), cast copper plug (20) and polytetrafluoroethylene sealing ring (21), polyurethane sealing gasket (19) is installed between valve stem (2) and valve body (4), cast copper plug (20) is installed on the bottom of valve stem (2), and polytetrafluoroethylene sealing ring (21) is sleeved on cast copper plug (20).

5. The self-purging valve of claim 4, wherein, Instrument connecting piece (11) includes instrument connecting pipe (22), valve body connecting pipe (23), stepped sealing mouth (24) and sealing buckle (25), instrument connecting pipe (22) and valve body connecting pipe (23) are installed in sealing buckle (25), and the head of instrument connecting pipe (22) and valve body connecting pipe (23) in sealing buckle (25) is equipped with stepped sealing mouth (24) respectively.

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