CN114754162B - Low-temperature ball valve - Google Patents
Low-temperature ball valve Download PDFInfo
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- CN114754162B CN114754162B CN202210394421.1A CN202210394421A CN114754162B CN 114754162 B CN114754162 B CN 114754162B CN 202210394421 A CN202210394421 A CN 202210394421A CN 114754162 B CN114754162 B CN 114754162B
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- pipe
- inlet pipe
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- 238000007789 sealing Methods 0.000 claims abstract description 83
- 238000010790 dilution Methods 0.000 claims description 5
- 239000012895 dilution Substances 0.000 claims description 5
- 239000002609 medium Substances 0.000 description 41
- 239000000243 solution Substances 0.000 description 5
- 238000007865 diluting Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012897 dilution medium Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0673—Composite packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0689—Packings between housing and plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/205—Sealing effected by the flowing medium
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to the technical field of valves, in particular to a low-temperature ball valve which comprises a valve body, a ball valve core, a valve rod, a pressure relief unit, a sealing assembly, an upper valve cover and a lower valve cover; one end of the valve body is an inlet pipe, the other end of the valve body is an outlet pipe, the spherical valve core is arranged in the middle of the valve body and used for isolating or communicating the inlet pipe with the outlet pipe, and the valve body penetrates into the valve body and is connected with the spherical valve core; the pressure relief unit is arranged in the valve body; the sealing component is arranged in the valve body and is communicated with the pressure relief unit to receive part of pressure relief medium; the upper valve cover is fixed on the top of the valve body in a sealing way; the lower valve cover is fixed at the bottom of the valve body in a sealing way and is communicated with the pressure relief unit or the spherical valve core; the ball valve is provided with the pressure relief unit, and the cavity is arranged in the lower valve cover, so that the cavity can be communicated with the inlet pipe and the outlet pipe, and part of medium is discharged to be decompressed in the cavity or discharged through the cavity under the condition of high pressure of medium expansion.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a low-temperature ball valve.
Background
With the development of chemical engineering projects in recent years, more and more technological processes need to be carried out at low temperature, such as petrochemical industry, coal chemical industry, refrigeration industry and other industries. These cryogenic medium supplies are typically flammable and explosive media such as liquefied petroleum gas, liquefied natural gas, and the like, and these media expand rapidly in volume or gasify to facilitate leakage and explosion when the temperature is increased.
In the technical standard of the low-temperature valve, the requirement of installing a pressure relief hole on the valve is not proposed. However, since there is a risk of leakage and explosion of the gasified medium, the pressure relief design is performed in some valve bodies in the prior art, but the stored medium is directly discharged through the pressure relief hole to pollute the environment, and the sealing property of the valve core is affected when the medium expands, so that we hope to reduce the leakage and expansion of the medium with the purpose of pressure relief, and reuse the medium dredged by pressure relief to the sealing of the valve core to improve the sealing property of the valve body, and thus, the low-temperature ball valve is provided.
Disclosure of Invention
The invention aims to solve the problems of explosion and leakage existing in medium expansion and provides a low-temperature ball valve.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a low-temperature ball valve comprises a valve body, a ball valve core, a valve rod, a pressure relief unit, a sealing assembly, an upper valve cover and a lower valve cover;
the ball valve core is arranged in the middle of the valve body and used for isolating or communicating the inlet pipe with the outlet pipe, and the valve body penetrates into the valve body and is connected with the ball valve core; the pressure relief unit is arranged in the valve body and used for reducing or relieving pressure of the preservation medium; the sealing component is arranged in the valve body and is in contact with the spherical valve core, and is communicated with the pressure relief unit and used for receiving part of pressure relief medium; the upper valve cover is fixed on the top of the valve body in a sealing way and penetrated by the valve rod; the lower valve cover is fixed at the bottom of the valve body in a sealing way, and is communicated with the pressure relief unit or the spherical valve core and used for reducing pressure during sealing or diluting a medium during exhausting.
Further, a first limit groove and a second limit groove are respectively formed in the ball cavity of the valve body and close to the inlet pipe and the outlet pipe, the first limit groove is communicated with the interior of the inlet pipe, and the second limit groove is communicated with the interior of the outlet pipe.
Further, the pressure relief grooves communicated with the outside are formed in the upper side and the lower side of the valve body, the first annular pipeline is formed in the inlet pipe, the second annular pipeline is formed in the outlet pipe, and the first annular pipeline and the second annular pipeline are respectively communicated with the adjacent pressure relief grooves.
Further, the pressure relief unit comprises a pressure valve and an electromagnetic valve; the pressure valve is arranged on the inlet pipe and is controlled to be communicated with the first annular pipeline, and the electromagnetic valve is arranged on the outlet pipe and is controlled to be communicated with the second annular pipeline.
Further, the pressure valve comprises a sealing rod and a spring; the sealing rod penetrates through the first annular pipeline and penetrates through the pipe wall of the inlet pipe, and the spring is fixed on the outer side of the sealing rod and is fixed with the outer wall of the inlet pipe.
Further, the sealing assembly comprises a sealing strip and a sealing air bag, the sealing strip is arranged inside the first limiting groove, the sealing air bag is communicated with the second limiting groove and the pressure relief groove, and the sealing air bag is filled with fluffy matters which enable the sealing air bag to expand.
Further, a cavity is formed in the lower valve cover, pressure sensors are mounted at the upper end and the lower end of the cavity, a piston plate is movably arranged in the cavity, holes are formed in the side edges of the cavity and are communicated with the pressure relief groove, and an inflation tube is communicated with the bottom of the lower valve cover.
Further, still include a pipe throat subassembly, pipe throat subassembly is used for controlling the medium velocity of flow when the ball valve is opened to including sleeve pipe, pipe throat board, the import pipe outside is located to the sleeve pipe cover, the ring channel has been seted up to the sleeve pipe inside, pipe throat board slope sets up one end through with slider and ring channel inner wall swing joint, the other end penetrates the import intraduct.
Further, a first limiting hole is arranged at the bottom end of the spherical valve core, and a one-way valve is arranged in the limiting hole.
Further, a second limiting hole communicated with the first limiting hole is formed in the lower valve cover, and the end part of the second limiting hole is connected with the air inlet pipe.
Compared with the prior art, the invention provides paper cup bowl detection equipment, which has the following beneficial effects:
1. the ball valve is provided with the pressure relief unit, the cavity is arranged in the lower valve cover, so that the cavity can be communicated with the inlet pipe and the outlet pipe, and in a medium expansion high-pressure state, partial medium is discharged into the cavity for pressure relief, so that the medium is prevented from being directly discharged to the outside to cause pollution, and the medium can be discharged from the outlet pipe.
2. According to the invention, the sealing strip and the sealing air bag are arranged in the valve body, the spherical valve core is subjected to double-layer sealing to provide tightness under the closing of the ball valve, the sealing air bag is filled with fluffy matters to realize expansion and contact with the spherical valve core, and a pressure release medium is introduced to increase friction force on the spherical valve core, so that the sealing effect is enlarged.
3. According to the invention, the pipe throat plate is obliquely inserted into the inlet pipe, the length of the pipe throat plate extending towards the interior of the inlet pipe is controlled by the sleeve, the distribution of the medium in the interior of the inlet pipe is increased through the pipe throat plate in the opening state of the ball valve, the negative pressure value of the medium passing through the ball valve core is increased, the dilution gas is sucked into the first limiting hole at the ball valve core, the dilution discharge of the medium is realized, and the explosion of a high-concentration medium is avoided.
Drawings
FIG. 1 is a schematic view of the whole sectional structure in embodiment 1 of the present invention;
FIG. 2 is a schematic diagram showing the split structure of the valve stem, the upper valve cover, the lower valve cover, etc. after the whole cross section in embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of a pressure relief unit according to the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 2A according to the present invention;
FIG. 5 is a schematic view of a seal assembly according to the present invention;
FIG. 6 is a schematic cross-sectional view of a sealed airbag of the present invention;
FIG. 7 is a schematic diagram showing the cross-section and related assembly structure of the lower valve cover in embodiment 1 of the present invention;
FIG. 8 is a schematic cross-sectional view of a valve body in embodiment 1 of the present invention;
FIG. 9 is a schematic view showing the overall sectional structure in embodiment 2 of the present invention;
FIG. 10 is a schematic view showing the overall sectional structure of the pipe larynx assembly according to embodiment 2 of the present invention after movement;
FIG. 11 is a schematic view showing the structure of a lower valve cover and pipe throat assembly according to embodiment 2 of the present invention;
FIG. 12 is a schematic overall sectional structure of embodiment 3 of the present invention;
fig. 13 is a schematic view showing the structure of a lower valve cover in a cross-section according to embodiment 3 of the present invention.
The reference numerals in the figures illustrate: 100. a valve body; 101. an inlet pipe; 102. an outlet tube; 103. a first limit groove; 104. the second limit groove; 105. a pressure relief groove; 106. a first annular duct; 107. a second annular duct; 200. a ball valve core; 201. a first limiting hole; 202. a one-way valve; 300. a valve stem; 400. a pressure relief unit; 401. a pressure valve; 402. an electromagnetic valve; 403. a sealing rod; 404. a spring; 500. a seal assembly; 501. a sealing strip; 502. sealing the air bag; 600. an upper valve cover; 700. a lower valve cover; 701. a cavity; 702. a pressure sensor; 703. a piston plate; 704. an inflation tube; 705. a second limiting hole; 706. an air inlet pipe; 800. a tube throat assembly; 801. a sleeve; 802. a throat plate; 803. an annular groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is further described below with reference to examples.
Example 1:
a low-temperature ball valve comprises a valve body 100, a spherical valve core 200 and a valve rod 300;
one end of the valve body 100 is provided with an inlet pipe 101, one end of the valve body 100 is provided with an outlet pipe 102, the spherical valve core 200 is arranged in the middle of the valve body 100 and used for isolating or communicating the inlet pipe 101 with the outlet pipe 102, and the valve body 100 penetrates into the valve body 100 to be connected with the spherical valve core 200;
a pressure relief unit 400 installed inside the valve body 100 for reducing or relieving pressure of the preservation medium;
the seal assembly 500 is arranged in the valve body 100 and is contacted with the ball-shaped valve core 200, the seal assembly 500 is communicated with the pressure relief unit 400, and part of pressure relief medium is received;
an upper bonnet 600 sealingly fixed to the top of the valve body 100 and penetrated by the valve stem 300;
the lower valve cover 700 is fixed at the bottom of the valve body 100 in a sealing way, and the lower valve cover 700 is communicated with the pressure relief unit 400 or the ball-shaped valve core 200 and is used for diluting a medium during exhaust in sealing.
Some embodiments of the present application are described in detail below with reference to the attached drawing figures:
referring to fig. 1-2, in the embodiment of the present application, the middle part of the valve body 100 is a ball valve cavity and is provided with a ball valve core 200, two symmetrical sides of the valve body 100 are communicated with the outside and are fixed with an inlet pipe 101 and an outlet pipe 102, the upper end and the lower end of the valve body 100 are opened, the upper end and the lower end of the valve body 100 are respectively fixed with an upper valve cover 600 and a lower valve cover 700 to seal the ball valve cavity, the middle part of the upper valve cover 600 of one valve rod 300 penetrates into the valve body 100 to be engaged with the ball valve core 200, and the rotation of the ball valve core 200 is realized by controlling the valve rod 300, so that the opening and closing of the ball valve are realized, namely, the isolation or the communication between the inlet pipe 101 and the outlet pipe 102 is realized.
In the implementation process, in order to realize the tightness of the ball valve when the ball valve is closed, the sealing assembly 500 is designed and provided, but before the second time, the first limit groove 103, the second limit groove 104 and the pressure relief groove 105 are formed in the valve body 100; wherein the first limiting groove 103 and the second limiting groove 104 are respectively arranged at positions close to the inlet pipe 101 and the outlet pipe 102. The pressure relief grooves 105 are symmetrically installed at the bottom of the valve body 100 and are used for circulating pressure relief and discharging media in a sealed state, wherein one end of the pressure relief groove 105 is directly communicated with the outside of the valve body 100, and the pressure relief media are directly discharged to the outside or collected for treatment.
Referring to fig. 5-6, a seal assembly 500 includes a seal strip 501, a seal bladder 502, etc.; the sealing strip 501 is used as a first sealing line and is installed inside the first limiting groove 103, and the sealing effect of the sealing strip 501 is improved through interference fit with the spherical valve core 200.
And the sealing air bag 502 is arranged in the second limiting groove 104 as a second sealing line, and the sealing effect of the sealing air bag 502 is improved through interference fit with the ball-type valve core 200. It should be noted, however, that the interior of the sealing bladder 502 is hollow, and is naturally inflated by filling with an inflatable material, such as a sponge, cotton wool, etc., when installed, and is in an interference fit with the ball-type valve cartridge 200 when inflated. In addition, the sealing air bag 502 is also communicated with the pressure relief groove 105, and medium discharged by pressure relief is introduced to continuously expand, so that the friction effect is enlarged.
In some embodiments, the pressure relief groove 105 may be communicated to the interior of the sealing bladder 502 where it is vented outwardly from the sealing bladder 502 under conditions where the pressure relief medium flow is small. The maintenance seal balloon 502 continues to expand.
In some embodiments, under the condition of large flow of the pressure release medium, the sealing air bag 502 is communicated with the pressure release groove 105 through the branch pipe, and a small amount of pressure release body is collected to complete continuous expansion of the sealing air bag 502.
Referring to fig. 3-4, in the embodiment of the application, a relief unit 400 of the ball valve is disposed on the inlet pipe 101 and the outlet pipe 102. The pressure relief unit 400 here includes a pressure valve 401, a solenoid valve 402, etc.; first, the first annular pipeline 106 and the second annular pipeline 107 are distributed inside the inlet pipe 101 and the outlet pipe 102 at positions close to the valve body 100. The upper side and the lower side of the inlet pipe 101 are both provided with pressure valves 401, the pressure valves 401 are utilized to block the first annular pipeline 106 from being communicated with the inlet pipe 101, if the pressure in the inlet pipe 101 is increased in a ball valve closed state, the pressure valves 401 are pressed and deformed, the first annular pipeline 106 is communicated with the inlet pipe 101, pressure release mediums flow into the first annular pipeline 106, and the pressure release mediums are discharged outwards through the pressure release grooves 105. The electromagnetic valves 402 are installed on the upper side and the lower side of the outlet pipe 102, wherein a control unit is installed on the electromagnetic valves 402, and the communication and the pattern between the second annular pipeline 107 and the outlet pipe 102 can be automatically controlled.
The pressure valve 401 is composed of a sealing rod 403, a spring 404 and the like, the sealing rod 403 passes through the first annular pipeline 106 from the outside and protrudes to the inner wall of the inlet pipe 101, the sealing rod 403 is fixed on the outer side of the sealing rod 403 and is fixed with the outer wall of the inlet pipe 101 by the spring 404, and the sealing rod 403 is supported by the spring 404 to be flush with the inner wall protruding to the inlet pipe 101. After the end of the sealing rod 403 is pressed, it slides outwards and deforms the spring 404.
Referring to fig. 7, it should be noted that, after one end of the lower pressure relief groove 105 is communicated with the first annular pipeline 106 or the second annular pipeline 107, the other end includes a first branch groove, a second branch groove, and a third branch groove, where the first branch groove is communicated with the air pipe of the sealing air bag 502, the second branch groove is communicated with the outside of the valve body (100), but in a sealed state in implementation, and the third branch groove is communicated with the cavity 701. The pressure release groove 105 above one end and the first annular pipeline 106 or the second annular pipeline 107 after being communicated, the other end comprises a first branch groove and a second branch groove, the first branch groove is communicated with the air pipe of the sealing air bag 502, and the second branch groove is communicated with the outside of the valve body (100), but is in a sealing state in implementation.
Referring to fig. 2 and 8, in the embodiment of the present application, the lower valve cover 700 is used to store or drain the pressure relief medium in addition to sealing the bottom of the valve body 100. Therefore, the lower valve cover 700 is thickened, a cavity 701 is formed in the lower valve cover 700, grooves are formed in the middle of the upper end and the lower end of the cavity 701, a pressure sensor 702 is arranged in the grooves, a piston plate 703 is movably arranged in the cavity 701, the bottom end of the cavity 701 is communicated with an inflation tube 704 at a position staggered with the pressure sensor 702 below, and the side edge of the cavity 701 is provided with holes. After the lower bonnet 700 is fixed to the valve body 100, the cavity 701 communicates with the relief grooves 105 on both sides. Wherein the piston plate 703 delaminates the cavity 701 and separates the charge gas from the exhaust medium.
The decompression principle in the above is as follows: after the air pressure in the inlet pipe 101 increases, the sealing rod 403 which is moved under pressure allows the first annular duct 106 to communicate with the inlet pipe 101, discharges the medium into the first annular duct 106 and diffuses outwards through the pressure release groove 105, but does not directly discharge to the outside, but flows into the sealing bladder 502 in a small amount, and remains inside the cavity 701.
Wherein, a medium is injected into the cavity 701 through the air charging pipe 704, the piston plate 703 is lifted to the highest point and pressed to the pressure sensor 702 at the upper side, and after maintaining a certain pressure in the cavity 701, the air charging pipe 704 is sealed by a pressure sensing valve. After the pressure relief medium flows into the top of the cavity 701, the piston plate 703 is continuously extruded, and after the air pressure below the piston plate 703 reaches the pressure sensing valve threshold, the filled medium is gradually discharged. If the piston plate 703 is moved down to the bottommost point, the cavity 701 is still inflated, the lower pressure sensor 702 is advanced to set the exhaust threshold, where the solenoid valve 402 is opened, medium in the cavity 701 flows out of the outlet tube 102, and the solenoid valve 402 is closed after the lower pressure sensor 702 should be below the exhaust threshold.
Example 2:
a low-temperature ball valve comprises a valve body 100, a spherical valve core 200 and a valve rod 300;
one end of the valve body 100 is provided with an inlet pipe 101, one end of the valve body 100 is provided with an outlet pipe 102, the spherical valve core 200 is arranged in the middle of the valve body 100 and used for isolating or communicating the inlet pipe 101 with the outlet pipe 102, and the valve body 100 penetrates into the valve body 100 to be connected with the spherical valve core 200;
an upper bonnet 600 sealingly fixed to the top of the valve body 100 and penetrated by the valve stem 300;
the lower valve cover 700 is fixed at the bottom of the valve body 100 in a sealing way, and the lower valve cover 700 is communicated with the pressure relief unit 400 or the ball-shaped valve core 200 and is used for diluting a medium during exhaust in sealing;
the tube throat assembly 800 is used to control the media flow rate when the ball valve is open.
Some embodiments of the present application are described in detail below with reference to the attached drawing figures:
referring to fig. 9-11, in embodiment 2, based on embodiment 1, but different therefrom, the inlet pipe 101 of the valve body 100 is provided with a throat assembly 800, and the throat assembly 800 is used to change the flow rate of the medium passing through the middle of the valve body 100 for the purpose of medium dilution.
Specifically, the pipe throat assembly 800 comprises a sleeve 801 and pipe throat plates 802, the sleeve 801 is sleeved outside the inlet pipe 101, a heat insulation layer is wrapped outside the sleeve 801, an annular groove 803 is formed in the sleeve 801, two pipe throat plates 802 are symmetrically arranged in the annular groove 803, one end of each pipe throat plate 802 is in sliding connection with the inner wall of the annular groove 803 through a sliding block, and the other end of each pipe throat plate 802 is inserted into the inlet pipe 101.
It should be noted that, the sleeve 801 is in interactive connection with the inlet pipe 101, in order to avoid air leakage at the sleeve 801, a slidable taper sleeve and sealing rubber strips are installed at two ends of the sleeve 801, the sealing rubber strips are attached to two sides of the edge of the strip sleeve 801, the sealing rubber strips are extruded when the two taper sleeves are close to the sleeve 801, and the sleeve 801 is fixed to be sealed through interference fit of the sealing rubber strips and the taper sleeve. And after the taper sleeve is removed to both sides, sleeve 801 is slidably adjusted.
It should be noted that the throat plate 802 is inserted into the inlet pipe 101 in an inclined manner, so that the throat plate 802 contacts the medium in an inclined manner, and the medium is restricted, not blocked.
When the moving sleeve 801 approaches the valve body 100, the throat plate 802 extends obliquely and continuously to the inside of the inlet pipe 101, and the two throat plates 802 extending to the inside of the inlet pipe 101 perform certain barrier to the medium, so that the air flow speed of the ball-shaped valve core 200 passing through is increased.
Wherein, the bottom end of the ball-shaped valve core 200 is provided with a first limiting hole 201, the lower valve cover 700 is provided with a second limiting hole 705 communicated with the first limiting hole 201, and the end part of the second limiting hole 705 is connected with an air inlet pipe 706.
In the specific implementation, the flow of the air passing through the ball-type valve core 200 is changed by using the pipe throat plate 802, so that the negative pressure value in the ball-type valve core 200 is increased, and the diluting medium is accelerated to be mixed into the middle of the ball-type valve core 200 upwards by the air inlet pipe 706.
In some embodiments, the check valve 202 may be installed inside the first limiting aperture 201. The initial control tube throat plate 802 does not extend toward the interior of the inlet tube 101, and the interior of the ball-type spool 200 flows through a steady negative pressure air flow. When dilution is required, the throat plate 802 extends to the inside of the inlet pipe 101, the negative pressure value in the ball valve core 200 is increased, and the check valve 202 is forced to be opened and is converged into the dilution medium.
Example 3:
referring to fig. 12-13, in its own embodiment, embodiment 1 is combined with embodiment 2. The middle part of the lower valve cover 700 is penetrated through an air inlet pipe 706, the piston plate 703 is in annular design, and the pressure sensor 702 is arranged in a staggered central position. Can realize sealing and pressure relief and can dilute the medium during the exhaust.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the protection scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. A low-temperature ball valve comprises a valve body (100), a spherical valve core (200) and a valve rod (300);
one end of the valve body (100) is an inlet pipe (101) and the other end is an outlet pipe (102), the spherical valve core (200) is arranged inside the valve body (100), and the valve body (100) penetrates into the valve body (100) to be connected with the spherical valve core (200);
characterized by further comprising:
the pressure relief unit (400) is arranged in the valve body (100) and is used for relieving pressure of a medium;
the sealing component (500) is arranged in the valve body (100) and is in contact with the ball-shaped valve core (200) for sealing the ball-shaped valve core (200), and the sealing component (500) is communicated with the pressure relief unit (400) to receive partial pressure relief medium;
an upper bonnet (600) sealingly secured to the top of the valve body (100) and penetrated by the valve stem (300);
the lower valve cover (700) is fixed at the bottom of the valve body (100) in a sealing way, and the lower valve cover (700) is communicated with the pressure relief unit (400) or the spherical valve core (200) and is used for medium pressure reduction during sealing or dilution during medium discharge;
a first limit groove (103) and a second limit groove (104) are respectively formed in the ball cavity of the valve body (100) adjacent to the inlet pipe (101) and the outlet pipe (102), the first limit groove (103) and the second limit groove (104) are internally used for installing a sealing assembly (500), the first limit groove (103) is communicated with the interior of the inlet pipe (101), and the second limit groove (104) is communicated with the interior of the outlet pipe (102);
the inside of the upper side and the lower side of the valve body (100) are provided with pressure relief grooves (105), the inside of the inlet pipe (101) is provided with a first annular pipeline (106), the inside of the outlet pipe (102) is provided with a second annular pipeline (107), and the first annular pipeline (106) and the second annular pipeline (107) are respectively communicated with the adjacent pressure relief grooves (105);
the pressure relief unit (400) comprises a pressure valve (401) and an electromagnetic valve (402); the pressure valve (401) is arranged on the inlet pipe (101) to control the inlet pipe to be communicated with the first annular pipeline (106), and the electromagnetic valve (402) is arranged on the outlet pipe (102) to control the outlet pipe to be communicated with the second annular pipeline (107);
the pressure sensor is characterized in that a cavity (701) is formed in the lower valve cover (700), a pressure sensor (702) is arranged in the cavity (701), a piston plate (703) is movably arranged in the cavity (701), a side edge of the cavity (701) is provided with a hole and is communicated with the pressure relief groove (105), and an air charging pipe (704) capable of introducing air into the cavity (701) is arranged at the bottom of the lower valve cover (700);
the ball valve is characterized by further comprising a pipe throat assembly (800), wherein the pipe throat assembly (800) is used for controlling the flow rate of a medium when the ball valve is opened and comprises a sleeve (801) and a pipe throat plate (802), the sleeve (801) is sleeved outside the inlet pipe (101), an annular groove (803) is formed in the sleeve (801), one end of the pipe throat plate (802) is in sliding connection with the inclined inner wall of the annular groove (803) through a sliding block, and the other end of the pipe throat plate penetrates into the inlet pipe (101);
a first limiting hole (201) is formed in the bottom end of the spherical valve core (200), and a one-way valve (202) is arranged in the first limiting hole (201);
a second limiting hole (705) communicated with the first limiting hole (201) is formed in the lower valve cover (700), and the end part of the second limiting hole (705) is connected with an air inlet pipe (706).
2. A cryogenic ball valve according to claim 1, characterized in that the pressure valve (401) comprises a sealing rod (403), a spring (404); the sealing rod (403) penetrates through the first annular pipeline (106) and penetrates through the pipe wall of the inlet pipe (101), and the spring (404) is fixed on the outer side of the sealing rod (403) and is fixed with the outer wall of the inlet pipe (101).
3. The cryogenic ball valve of claim 1, wherein the sealing assembly (500) comprises a sealing strip (501) and a sealing airbag (502), the sealing strip (501) is installed inside the first limiting groove (103), the sealing airbag (502) is installed inside the second limiting groove (104), the sealing airbag (502) is communicated with the pressure relief groove (105) through an air pipe, and the sealing airbag (502) is filled with a fluffy matter which enables the sealing airbag to expand.
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| CN202210394421.1A CN114754162B (en) | 2022-04-15 | 2022-04-15 | Low-temperature ball valve |
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| CN202210394421.1A CN114754162B (en) | 2022-04-15 | 2022-04-15 | Low-temperature ball valve |
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| CN114754162B true CN114754162B (en) | 2024-02-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116336232B (en) * | 2023-03-08 | 2023-10-20 | 江苏麦科特种阀门科技有限公司 | Safety cut-off valve |
| CN117628222B (en) * | 2024-01-26 | 2024-04-12 | 四川省简阳市川力机械制造有限责任公司 | Ball valve |
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Denomination of invention: A low-temperature ball valve Granted publication date: 20240206 Pledgee: Industrial Bank Co.,Ltd. Wenzhou Ruian sub branch Pledgor: ZHEJIANG BEIER CONTROL VALVE Co.,Ltd. Registration number: Y2024980014820 |