CN118499481B - Vacuum extraction valve on vacuum tank capable of realizing self-locking and working method thereof - Google Patents
Vacuum extraction valve on vacuum tank capable of realizing self-locking and working method thereof Download PDFInfo
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- CN118499481B CN118499481B CN202410955495.7A CN202410955495A CN118499481B CN 118499481 B CN118499481 B CN 118499481B CN 202410955495 A CN202410955495 A CN 202410955495A CN 118499481 B CN118499481 B CN 118499481B
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
The invention discloses a vacuum extraction valve on a vacuum tank capable of realizing self-locking and a working method thereof, which solve the problems of weak air tightness, complex structure and difficult operation of the existing vacuum extraction valve, and belong to the technical field of valves; a vacuum valve body seat is arranged on a vacuum tank body, a movable valve core is arranged in the vacuum valve body seat, a valve core central air suction channel is arranged at the upper part of the movable valve core, a valve body air suction channel is arranged at the lower part of the vacuum valve body seat, an annular communication groove is arranged in the middle of an inner cavity of the vacuum valve body seat, the annular communication groove is communicated with the upper end of the valve body air suction channel at the lower part of the valve body seat, a plurality of horizontal communication air channels with different heights are arranged between the valve core central air suction channel and the valve core outer side wall, so that each air suction port of the horizontal communication air channel on the valve core outer side wall is spirally arranged, and an vacuumizing air channel comprising the valve core central air suction channel, the horizontal communication air channel, the annular communication groove and the valve body air suction channel which are sequentially communicated is constructed; simple structure, the gas tightness is strong.
Description
Technical Field
The invention relates to a vacuum extraction valve on a vacuum tank, in particular to a vacuum extraction valve capable of realizing self-locking of the vacuum degree in the vacuum tank in the vacuumizing process and a working method thereof, and belongs to the technical field of vacuum valves.
Background
In the production process of chemical enterprises, various closed vacuum tanks are used, and the vacuum degree requirements on the same vacuum tank are different according to different production process requirements, so that the vacuum tank needs to be vacuumized on site; the existing vacuum tank is generally provided with a fixed vacuumizing port, the vacuum pump is connected with the vacuumizing port through a vacuumizing pipeline, and vacuumizing operation is carried out, when the vacuum degree in the vacuum tank reaches the requirement, the vacuumizing pipeline is required to be dismantled, and the vacuumizing port is sealed; the prior art also has the defects that the vacuum valve is arranged on the vacuumizing port, but the vacuum valve on the existing vacuum tank has the defects of weak air tightness, poor wear resistance of sealing parts, short service life, complex structure and difficult maintenance; how to develop a vacuum extraction valve which has strong air tightness, simple structure and convenient use, can realize self-locking of the vacuum extraction valve and keep the vacuum degree in the tank stable, and has become a difficult problem to be solved on site.
Disclosure of Invention
The invention provides a vacuum extraction valve on a vacuum tank capable of realizing self-locking and a working method thereof, which solve the technical problems of weak air tightness, complex structure and difficult operation of the existing vacuum extraction valve.
The invention solves the technical problems by the following technical proposal:
the present general inventive concept: a vacuum valve body seat is arranged on a vacuum tank body, a movable valve core is arranged in the vacuum valve body seat, a sealing ring is arranged between the inner cavity of the vacuum valve body seat and the valve core, a valve core central air suction channel is arranged at the upper part of the movable valve core, a valve body air suction channel is arranged at the lower part of the vacuum valve body seat, an annular communication groove is arranged in the middle of the inner cavity of the vacuum valve body seat, the annular communication groove is communicated with the upper end of the valve body air suction channel at the lower part of the valve body seat, a plurality of horizontal communication air channels with different heights are arranged between the valve core central air suction channel and the outer side wall of the valve core, and all air suction port connecting lines of the horizontal communication air channels on the outer side wall of the valve core are spirally arranged to construct a valve core central air suction channel, a horizontal communication air channel, an annular communication groove and an air suction channel of the valve body air suction channel which are sequentially communicated; in the vacuumizing process, the valve core moves towards the in-tank direction along with the improvement of the vacuumizing degree in the tank under the action of external air pressure, so that the vacuumizing channel is cut off by dislocation of the vacuumizing opening of the horizontal communication air channel on the valve core and the annular communication groove, the self-locking function of the vacuumizing valve is realized, and the vacuum degree in the tank is kept in a designed stable value state.
The vacuum extraction valve comprises a tank wall of the vacuum tank, wherein a valve body installation through hole is formed in the tank wall, a valve body seat is arranged in the valve body installation through hole, a valve core movable embedded inner cavity is formed in the valve body seat, and the valve core movable embedded inner cavity is used for communicating the inner cavity of the vacuum tank with the atmosphere outside the tank body; the valve core is movably embedded in the valve core movable embedded cavity, a valve core central air suction channel is arranged at the upper part of the valve core, a valve seat body upper vacuumizing channel is arranged at the lower part of the valve body seat, an annular communication air channel groove is arranged at the middle part of the valve core movable embedded cavity of the valve body seat, horizontal communication air channels are arranged between the valve core central air suction channel and the outer cylindrical vertical surface of the valve core at equal intervals along the central axis direction of the valve core, each horizontal communication air channel air port on the outer cylindrical vertical surface of the valve core is spirally arranged, and the valve core central air suction channel, the horizontal communication air channels, the annular communication air channel groove and the valve seat body upper vacuumizing channel are sequentially communicated to form a vacuumizing air channel; a pressure spring is arranged between the lower end of the valve core movable embedded inner cavity and the valve core.
The outer end of the valve core is provided with an annular outer eave, the outer port of the central air extraction channel of the valve core is connected with a vacuum pump connecting hose in a screwed manner, and the other end of the vacuum pump connecting hose is connected with a vacuum pump.
A first valve core sealing ring embedding groove is formed in the outer cylindrical elevation of the valve core above the air port, a second valve core sealing ring embedding groove is formed in the outer elevation of the valve core below the air port, a first valve core sealing ring is arranged in the first valve core sealing ring embedding groove, and a second valve core sealing ring is arranged in the second valve core sealing ring embedding groove; the valve core of the valve body seat is movably embedded into the lower end of the inner cavity, a pressure spring limiting step is arranged on the pressure spring limiting step, and the upper end of the pressure spring is propped against the valve core limiting step at the lower end of the valve core.
A valve body limiting annular step is arranged on the outer side port of the valve body mounting through hole, a valve seat annular outer eave is arranged at the outer side end of the valve body seat, the valve seat annular outer eave is embedded into the valve body limiting annular step, and a gasket and a valve seat fixing nut are respectively arranged at the inner side end of the valve body seat; the valve seat sealing ring embedding groove is formed in the outer side wall of the valve body seat, and the valve seat sealing ring is arranged in the valve seat sealing ring embedding groove; four vacuum-pumping channels are arranged on the lower part of the valve body seat at equal intervals and radian and are parallel to each other.
A third valve core sealing ring embedding groove is formed in the outer vertical surface of the valve core above the first valve core sealing ring embedding groove, and a third valve core sealing ring is arranged in the third valve core sealing ring embedding groove; the outer annular eave of the outer end of the valve core is provided with a handle.
The working method of the vacuum extraction valve on the vacuum tank capable of realizing self-locking comprises the following steps:
the method comprises the steps that firstly, the connecting end of a vacuum pump connecting hose is connected to an outer side port of a central air extraction channel of a valve core through connecting threads, and an air port of an innermost horizontal communication air channel on the outer side elevation of the valve core is communicated with an annular communication air channel groove;
Starting a vacuum pump, wherein the vacuum pump sequentially passes through a vacuum pump connecting hose, a valve core central air extraction channel, an innermost horizontal communication air channel, an air port of the innermost horizontal communication air channel, an annular communication air channel groove and a vacuum extraction channel on a valve seat body, and vacuumizing the inner cavity of the vacuum tank;
Thirdly, gradually increasing the vacuum degree of the inner cavity of the vacuum tank, enabling the atmospheric pressure outside the vacuum tank to move towards the inner cavity of the vacuum tank along the valve core movable embedded inner cavity of the valve body seat through the annular outer eave of the outer end of the valve core, and compressing the pressure spring; along with the inward movement of the valve core, the communication area between the innermost air port of the innermost horizontal communication air path and the annular communication air path groove is gradually reduced, in the process, the second air port of the second horizontal communication air path above the innermost horizontal communication air path is communicated with the annular communication air path groove, the communication area is gradually increased, and then the communication area is gradually reduced; repeating the above processes through the air port on the third inner side of the third horizontal communication air path above the second horizontal communication air path, so as to realize continuous vacuumizing of the inner cavity of the vacuum tank;
And fourthly, when the outermost air port of the outermost horizontal communication air channel is gradually communicated with the annular communication air channel groove, the communication area is increased, then the communication area is gradually reduced, when the communication area is reduced to 0, the movement of the valve core into the vacuum tank is stopped, the vacuumizing operation on the inner cavity of the vacuum tank is completed, at the moment, the communication paths of the annular communication air channel groove and the horizontal communication air channel are blocked, and the self-locking of the vacuum degree of the inner cavity of the vacuum tank is realized.
According to different requirements of vacuum degree of the inner cavity of the vacuum tank, pressure springs with different pressures are selected.
When the vacuum environment of the inner cavity of the vacuum tank needs to be relieved, the valve core is pulled outwards through the handle, the blocking of the communication paths of the annular communication air channel groove and the horizontal communication air channel is relieved, and the air port of the horizontal communication air channel is communicated with the annular communication air channel groove.
The invention combines the vacuum extraction valve on the tank wall of the vacuum tank, skillfully utilizes the pressure difference between the inside and the outside of the tank in the vacuum extraction process, and enables the valve core to move towards the direction in the tank under the action of the pressure difference, and in the moving process of the valve core, each horizontal communication gas path in the valve core is communicated with the annular communication gas path groove in a relay manner, thereby realizing the continuous communication of the gas paths in the vacuum extraction process, and when the vacuum degree in the vacuum tank meets the design requirement, the gas port of the horizontal communication gas path at the outermost side is misplaced with the annular communication gas path groove, thereby realizing the blocking of the vacuum extraction gas path, achieving the self-locking of the vacuum extraction valve body and keeping the vacuum degree in the tank stable; the invention has simple structure, strong air tightness and convenient operation and use.
Drawings
FIG. 1 is a schematic view of the structure of the present invention prior to evacuation;
in the figure, the lower part of the tank wall 1 is in the vacuum tank, and the upper part of the tank wall 1 is outside the vacuum tank;
FIG. 2 is a schematic view of the structure of the invention after the evacuation is completed;
Fig. 3 is a schematic perspective view of the valve body seat 4 of the present invention;
fig. 4 is a longitudinal sectional view of the valve body seat 4 of the present invention;
fig. 5 is a schematic perspective view of the valve element 14 of the present invention;
Reference numerals: 1-tank wall, 2-valve body mounting hole, 3-valve body spacing annular step, 4-valve body seat, 5-valve seat sealing washer, 6-valve seat annular outer eaves, 7-gasket, 8-valve seat fixation nut, 9-inner chamber, 10-valve seat upper vacuumizing channel, 11-annular communication gas circuit recess, 12-first valve core sealing washer, 13-second valve core sealing washer, 14-valve core, 15-valve core central pumping channel, 16-pressure spring spacing step, 17-pressure spring, 18-valve core outer end annular outer eaves, 19-horizontal communication gas circuit, 20-vacuum pump connecting hose, 21-handle, 22-valve seat sealing washer embedding recess, 23-first valve core sealing washer embedding recess, 24-second valve core sealing washer embedding recess, 25-third valve core sealing washer embedding recess, 26-third valve core sealing washer, 27-gas port, 28-valve core spacing step.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
the vacuum extraction valve comprises a tank wall 1 of a vacuum tank, wherein a valve body installation through hole 2 is formed in the tank wall 1, a valve body seat 4 is arranged in the valve body installation through hole 2, a valve element movable embedded inner cavity 9 is formed in the valve body seat 4, and the valve element movable embedded inner cavity 9 communicates the inner cavity of the vacuum tank with the atmosphere outside the tank body; a valve core 14 is movably arranged in a valve core movable embedded cavity 9 of a valve body seat 4, the valve core 14 can move up and down in the valve core movable embedded cavity 9, a valve core central air suction channel 15 is arranged at the upper part of the valve core 14, the valve core central air suction channel 15 is arranged at the central axis position of the upper part of the valve core 14, a valve seat body upper vacuumizing channel 10 is arranged at the lower part of the valve body seat 4, namely the valve seat body upper vacuumizing channel 10 is arranged in the seat wall of the lower part of the valve body seat 4, an annular communication air channel groove 11 is arranged at the middle part of the valve core movable embedded cavity 9 of the valve body seat 4, horizontal communication air channels 19 are arranged between the valve core central air suction channel 15 and the outer cylindrical elevation of the valve core 14 at equal intervals along the central axis direction of the valve core 14, the horizontal communication air channels 19 are arranged in the radial direction of the cylindrical valve core, the horizontal communication air channels 19 communicate the valve core central air suction channel 15 with the outer cylindrical elevation of the valve core 14, each horizontal communication air channel 19 is arranged in a shape, and two adjacent air ports 27 are partially overlapped in space, and the central air suction channel 15, the horizontal communication air channels 19, the annular communication air channels 11 and the annular air inlets 10 are communicated with each other in sequence; a pressure spring 17 is arranged between the lower end of the valve core movable embedded cavity 9 of the valve body seat 4 and the valve core 14; after the jacking force of the pressure spring 17 and the downward movement friction force between the valve core 14 and the valve core movable embedded cavity 9 are overlapped, a pair of reverse balance forces are formed with the external air pressure of the valve core 14, when the external air pressure of the valve core 14 is greater than the jacking force of the pressure spring 17, the valve core 14 moves towards the tank, and when the external air pressure of the valve core 14 is equal to the jacking force of the pressure spring 17, the valve core 14 stops moving towards the tank.
The outer end of the valve core 14 is provided with a valve core outer end annular outer eave 18, so that the pressure of atmospheric pressure to the valve core 14 towards the tank internal pressure is increased, a vacuum pump connecting hose 20 is connected to the outer port of a valve core central air extraction channel 15 of the valve core 14 in a screwed mode, the other end of the vacuum pump connecting hose 20 is connected with a vacuum pump, and the vacuum pump connecting hose 20 moves downwards along with the valve core 14 in the vacuumizing process.
A first spool sealing ring embedding groove 23 is formed in the outer cylindrical elevation of the spool 14 above the air port 27, a second spool sealing ring embedding groove 24 is formed in the outer cylindrical elevation of the spool 14 below the air port 27, a first spool sealing ring 12 is arranged in the first spool sealing ring embedding groove 23, and a second spool sealing ring 13 is arranged in the second spool sealing ring embedding groove 24; the lower end of the valve core movable embedded cavity 9 of the valve body seat 4 is provided with a pressure spring limiting step 16, the pressure spring limiting step 16 is provided with a pressure spring 17, and the upper end of the pressure spring 17 is propped against a valve core limiting step 28 at the lower end of the valve core 14; through the setting of each sealing washer to guarantee the gas tightness in the vacuum tank.
The valve body limiting annular step 3 is arranged on the outer side port of the valve body mounting through hole 2, the valve seat annular outer eave 6 is arranged at the outer side end of the valve body seat 4, the valve seat annular outer eave 6 is embedded into the valve body limiting annular step 3, and the gasket 7 and the valve seat fixing nut 8 are respectively arranged at the inner side end of the valve body seat 4, so that the valve body is convenient to assemble and replace; a valve seat sealing ring embedding groove 22 is arranged on the outer side wall of the valve body seat 4, and a valve seat sealing ring 5 is arranged in the valve seat sealing ring embedding groove 22; four valve seat body upper vacuumizing channels 10 are arranged at the lower part of the valve body seat 4 in parallel at equal intervals in radian, and the four valve seat body upper vacuumizing channels 10 are communicated with an annular communication gas path groove 11.
A third spool sealing ring embedding groove 25 is arranged on the outer cylindrical elevation of the spool 14 above the first spool sealing ring embedding groove 23, and a third spool sealing ring 26 is arranged in the third spool sealing ring embedding groove 25; the handle 21 is provided on the outer annular flange 18 of the valve core, and the valve core 14 is moved up and down by manually pulling or pressing the outer annular flange 18 of the valve core.
A working method of a vacuum extraction valve capable of realizing vacuum degree self-locking on a vacuum tank comprises the following steps of:
The first step, connecting the end part of a vacuum pump connecting hose (20) on the outer port of a valve core central air extraction channel (15) through matching threads, and communicating an air port (27) of an innermost horizontal communicating air channel (19) on the outer vertical surface of a valve core (14) with an annular communicating air channel groove (11);
Secondly, starting a vacuum pump, wherein the vacuum pump sequentially passes through a vacuum pump connecting hose 20, a valve core central air extraction channel 15, an innermost horizontal communication air channel 19, an air port 27 of the innermost horizontal communication air channel 19, an annular communication air channel groove 11 and a vacuum extraction channel 10 on a valve seat body, and vacuum is extracted from the inner cavity of the vacuum tank;
Thirdly, along with the gradual increase of the vacuum degree of the inner cavity of the vacuum tank, the atmospheric pressure outside the vacuum tank moves towards the inner tank direction of the vacuum tank along the valve core movable embedded inner cavity 9 of the valve body seat 4 by the annular outer eave 18 of the valve core outer end, and the pressure spring 17 is compressed; as the valve core 14 moves inward, the communication area between the innermost air port 27 of the innermost horizontal communication air path 19 and the annular communication air path groove 11 is gradually reduced, in the process, the second air port 27 of the second horizontal communication air path 19 above the innermost horizontal communication air path 19 is gradually communicated with the annular communication air path groove 11, the communication area is increased, and then the communication area is gradually reduced; then, the process is repeated by the air port 27 on the third inner side of the third horizontal communication air passage 19 above the second horizontal communication air passage 19, so that the continuous vacuumizing of the inner cavity of the vacuum tank is realized; the air ports 27 horizontally communicated with the outer side end of the air passage 19 are spirally arranged on the cylindrical outer vertical surface of the valve core 14, and the two adjacent air ports 27 are partially overlapped in space so as to ensure that the vacuumizing air passage is communicated in the process of moving the valve core 14 into the vacuum tank;
fourth, when the outermost air port 27 of the outermost horizontal communication air channel 19 is gradually communicated with the annular communication air channel groove 11, the communication area is increased, and finally the communication area is gradually reduced, when the communication area is reduced to 0, the valve core 14 is stopped moving inwards, so that the vacuumizing operation of the inner cavity of the vacuum tank is completed, at the moment, the communication between the annular communication air channel groove 11 and the horizontal communication air channel 19 is blocked, and the self-locking of the vacuumizing air channel in the vacuumizing valve is realized.
According to different requirements of vacuum degree of the inner cavity of the vacuum tank, the compression springs 17 with different pressures can be replaced; different compression springs 17 have different deformation elasticity, and under the condition that the air pressure outside the tank is the same, the extraction of different vacuum degrees in the tank can be realized; of course, the vacuum tank may be placed in a pressure environment with larger air pressure, for example, the pressure springs 17 with different deformation elasticity may be calculated and selected according to the requirement of the vacuum degree in the vacuum tank.
When the vacuum environment of the inner cavity of the vacuum tank needs to be relieved, the vacuum pump connecting hose 20 is removed firstly, then the valve core 14 is pulled outwards through the handle 21, the blocking of the communication paths of the annular communication air channel groove 11 and the horizontal communication air channel 19 is relieved, the air port 27 of the horizontal communication air channel 19 is communicated with the annular communication air channel groove 11, and the atmosphere outside the vacuum tank enters the vacuum tank through the vacuumizing air channel.
Claims (6)
1. The vacuum extraction valve comprises a tank wall (1) of a vacuum tank, wherein a valve body installation through hole (2) is formed in the tank wall (1), a valve body seat (4) is arranged in the valve body installation through hole (2), a valve core movable embedded inner cavity (9) is formed in the valve body seat (4), and the valve core movable embedded inner cavity (9) is used for communicating the inner cavity of the vacuum tank with the atmosphere outside the tank body; the valve is characterized in that a valve core (14) is movably embedded in a valve core movable embedded cavity (9), a valve core central air suction channel (15) is arranged at the upper part of the valve core (14), a valve seat body upper vacuumizing channel (10) is arranged at the lower part of a valve body seat (4), an annular communication air channel groove (11) is formed in the middle part of the valve core movable embedded cavity (9) of the valve body seat (4), horizontal communication air channels (19) are formed between the valve core central air suction channel (15) and the outer cylindrical vertical surface of the valve core (14) at equal intervals along the central axis direction of the valve core (14), and air ports (27) of each horizontal communication air channel (19) on the outer cylindrical vertical surface of the valve core (14) are arranged in a spiral shape, and the valve core central air suction channel (15), the horizontal communication air channels (19), the annular communication air channel groove (11) and the valve seat body upper vacuumizing channel (10) are sequentially communicated to form a vacuumizing air channel; a pressure spring (17) is arranged between the lower end of the valve core movable embedded inner cavity (9) and the valve core (14); the outer end of the valve core (14) is provided with an annular outer eave (18) at the outer end of the valve core, a vacuum pump connecting hose (20) is connected on the outer port of a valve core central air suction channel (15) of the valve core (14) in a screwed manner, and the other end of the vacuum pump connecting hose (20) is connected with a vacuum pump; a first valve core sealing ring embedding groove (23) is formed in the outer cylindrical vertical surface of the valve core (14) above the air port (27), a second valve core sealing ring embedding groove (24) is formed in the outer vertical surface of the valve core (14) below the air port (27), a first valve core sealing ring (12) is arranged in the first valve core sealing ring embedding groove (23), and a second valve core sealing ring (13) is arranged in the second valve core sealing ring embedding groove (24); the lower end of a valve core movable embedded cavity (9) of the valve body seat (4) is provided with a pressure spring limiting step (16), the pressure spring limiting step (16) is provided with a pressure spring (17), and the upper end of the pressure spring (17) is propped against a valve core limiting step (28) at the lower end of the valve core (14); when the vacuumizing operation of the inner cavity of the vacuum tank is finished, the communication area between the outermost air port (27) of the outermost horizontal communication air channel (19) and the annular communication air channel groove (11) is reduced to 0, the valve core (14) moves inwards to stop, and the communication between the annular communication air channel groove (11) and the horizontal communication air channel (19) is blocked.
2. The vacuum extraction valve on the vacuum tank capable of realizing self-locking according to claim 1, wherein a valve body limiting annular step (3) is arranged on an outer side port of a valve body mounting through hole (2), a valve seat annular outer eave (6) is arranged at an outer side end of a valve body seat (4), the valve seat annular outer eave (6) is embedded into the valve body limiting annular step (3), and a gasket (7) and a valve seat fixing nut (8) are respectively arranged at an inner side end of the valve body seat (4); a valve seat sealing ring embedding groove (22) is formed in the outer side wall of the valve body seat (4), and a valve seat sealing ring (5) is arranged in the valve seat sealing ring embedding groove (22); four vacuum-pumping channels (10) parallel to each other are arranged at equal intervals and radian at the lower part of the valve body seat (4).
3. The vacuum extraction valve on the vacuum tank capable of realizing self-locking according to claim 2, wherein a third valve core sealing ring embedding groove (25) is arranged on the outer side elevation of the valve core (14) above the first valve core sealing ring embedding groove (23), and a third valve core sealing ring (26) is arranged in the third valve core sealing ring embedding groove (25); a handle (21) is arranged on the annular outer eave (18) at the outer end of the valve core.
4. The method of operating a vacuum pump-out valve on a vacuum tank capable of achieving self-locking as claimed in claim 1, characterized by the steps of:
the method comprises the steps that firstly, the connecting end of a vacuum pump connecting hose (20) is connected to the outer side port of a valve core central air extraction channel (15) through connecting threads, an inner thread is arranged at the outer side port of the valve core central air extraction channel (15), and an outer thread is arranged at the connecting end of the vacuum pump connecting hose (20); and, make the air port (27) of the horizontal communicating air path (19) of the innermost on the cylindrical elevation of outside of the valve core (14) communicate with annular communicating air path recess (11) together;
Secondly, starting a vacuum pump, wherein the vacuum pump sequentially passes through a vacuum pump connecting hose (20), a valve core central air extraction channel (15), an innermost horizontal communication air channel (19), an air port (27) of the innermost horizontal communication air channel (19), an annular communication air channel groove (11) and a vacuum extraction channel (10) on a valve seat body, and vacuumizing an inner cavity of a closed vacuum tank;
Thirdly, along with the gradual increase of the vacuum degree of the inner cavity of the vacuum tank, the atmospheric pressure outside the vacuum tank moves towards the inner cavity (9) of the vacuum tank along the movable embedding of the valve core (14) of the valve body seat (4) by the annular outer eave (18) at the outer end of the valve core, and the pressure spring (17) is compressed; along with the inward movement of the valve core (14), the communication area between the innermost air port (27) of the innermost horizontal communication air channel (19) and the annular communication air channel groove (11) is gradually reduced, in the process, the second air port (27) of the second horizontal communication air channel (19) above the innermost horizontal communication air channel (19) is communicated with the annular communication air channel groove (11), the communication area is gradually increased, and then the communication area is gradually reduced; then, the process is repeated through an air port (27) on the inner side of a third air port (19) above the second horizontal communication air path (19), so that continuous vacuumizing of the inner cavity of the vacuum tank is realized;
fourth step, when the outmost gas port (27) of the outmost horizontal communication gas path (19) is gradually communicated with the annular communication gas path groove (11), the communication area is increased, then the communication area is gradually reduced, when the communication area is reduced to 0, the movement of the valve core (14) into the vacuum tank is stopped, the vacuumizing operation on the inner cavity of the vacuum tank is completed, at the moment, the communication path between the annular communication gas path groove (11) and the horizontal communication gas path (19) is blocked, and the self-locking of the vacuumizing gas path in the vacuumizing valve is realized.
5. The method according to claim 4, wherein the pressure springs (17) with different pressures are selected according to different requirements of the vacuum degree of the inner cavity of the vacuum tank.
6. The working method of the vacuum extraction valve on the vacuum tank capable of realizing self-locking according to claim 5, wherein when the vacuum environment of the inner cavity of the vacuum tank needs to be relieved, the valve core (14) is pulled outwards through the handle (21), the blocking of the communication path between the annular communication air channel groove (11) and the horizontal communication air channel (19) is relieved, and the air port (27) of the horizontal communication air channel (19) is communicated with the annular communication air channel groove (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410955495.7A CN118499481B (en) | 2024-07-17 | 2024-07-17 | Vacuum extraction valve on vacuum tank capable of realizing self-locking and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410955495.7A CN118499481B (en) | 2024-07-17 | 2024-07-17 | Vacuum extraction valve on vacuum tank capable of realizing self-locking and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118499481A CN118499481A (en) | 2024-08-16 |
| CN118499481B true CN118499481B (en) | 2024-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410955495.7A Active CN118499481B (en) | 2024-07-17 | 2024-07-17 | Vacuum extraction valve on vacuum tank capable of realizing self-locking and working method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08135820A (en) * | 1994-11-04 | 1996-05-31 | Sekisui Chem Co Ltd | Vacuum valve |
| CN101358665A (en) * | 2008-09-12 | 2009-02-04 | 刘永杰 | Miniature passive bidirectional vacuum valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE116824T1 (en) * | 1990-10-22 | 1995-01-15 | Solich Gmbh | CONTAINERS FOR STORING AND TRANSPORTING BIOLOGICAL SUBSTANCES, ESPECIALLY FOOD. |
| JP4258757B2 (en) * | 2003-04-21 | 2009-04-30 | 旭有機材工業株式会社 | Vacuum regulator |
| CN204664524U (en) * | 2014-12-31 | 2015-09-23 | 深圳市冠瑞达能源装备有限公司 | A kind of intake valve for exhaust end base of oil injection threaded bolt formula vavuum pump |
| CN207903086U (en) * | 2018-03-02 | 2018-09-25 | 黄山市锐翔包装股份有限公司 | Cylinder stealth valve vacuum tank |
| CN116876626A (en) * | 2023-06-26 | 2023-10-13 | 武汉长行机电科技有限公司 | Integrated vacuum one-way valve for airborne toilet |
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2024
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08135820A (en) * | 1994-11-04 | 1996-05-31 | Sekisui Chem Co Ltd | Vacuum valve |
| CN101358665A (en) * | 2008-09-12 | 2009-02-04 | 刘永杰 | Miniature passive bidirectional vacuum valve |
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| CN118499481A (en) | 2024-08-16 |
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