CN109931425B - Leak protection emptying devices - Google Patents
Leak protection emptying devices Download PDFInfo
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- CN109931425B CN109931425B CN201711364827.0A CN201711364827A CN109931425B CN 109931425 B CN109931425 B CN 109931425B CN 201711364827 A CN201711364827 A CN 201711364827A CN 109931425 B CN109931425 B CN 109931425B
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- leak
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- 239000007788 liquid Substances 0.000 claims abstract description 101
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims description 13
- 239000012528 membrane Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005303 weighing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention relates to a protection device, in particular to a leakage-proof emptying device, which is arranged at the lower part of a tank body, a valve body, a liquid-proof soft film, a valve core and a biasing force piece, when the biasing force is larger than the pressure of the liquid channel, the valve core moves towards the direction of the liquid channel, and the liquid-blocking soft film deforms under the action of the biasing force and/or the pressure in the gas channel so as to open the gas channel; conversely, the valve core moves reversely to close the gas channel. The invention aims to solve the technical problems that the leak-proof emptying device for gas feeding in the prior art has a complex structure and high manufacturing cost, and further provides the leak-proof emptying device with a simple structure and low manufacturing cost.
Description
Technical Field
The invention relates to a protection device, in particular to a leakage-proof emptying device.
Background
The Chinese patent document CN206407631U discloses an automatic feeding device for constant pressure feeding system, and it is including first jar of body, second jar of body, weighing device and main control unit, the output interface of the second jar of body passes through the pipeline connection with the input interface of the first jar of body and is equipped with automatically controlled feed valve on this pipeline, be equipped with first air inlet on the first jar of body, be equipped with the second air inlet on the second jar of body, first air inlet and second air inlet are used for switching in compressed air respectively, the output interface of the first jar of body is connected with output pipeline, be equipped with automatically controlled discharge valve on the output pipeline, weighing device, automatically controlled feed valve and automatically controlled discharge valve are electric connection respectively in main control unit, the weighing device is located to the first jar of body, weighing device is used for measuring the weight data of the first jar of body to send this weight data to main control unit in the form of signal of telecommunication.
In the prior art, the high-pressure gas is filled into the tank body, the liquid level is pressurized by the high-pressure gas to enable the feed liquid to be fed out of the discharge pipe, but in order to prevent the high-pressure gas from being discharged into a later process from the discharge pipe after the feed liquid is used, whether the feed liquid in the tank body is used up or not is measured through devices such as a weighing device, an electric control discharge valve and a main controller in the prior art, when the liquid level of the feed liquid in the tank body reaches an output interface, the weighing device feeds back weight, the main controller controls the electric control discharge valve to be closed, but the prior art is complex in structure and high in manufacturing cost.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is that the leakage-proof emptying device for gas feeding in the prior art has a complex structure and high manufacturing cost, and further provides the leakage-proof emptying device with a simple structure and low manufacturing cost.
In order to solve the technical problems, the invention provides a leak-proof emptying device arranged at the lower part of a tank body, which comprises
The valve body is formed with a valve cavity, and a liquid channel communicated with the valve cavity and a gas channel communicated with the inside and the outside of the tank body through the valve cavity are formed on the valve body;
the liquid-blocking soft film is arranged between the gas channel and the liquid channel and is used for sealing and separating the valve cavity into a liquid side valve cavity and a gas side valve cavity; and
the valve core is arranged in the liquid side valve cavity and is matched with the liquid blocking soft film and the inner side wall of the valve cavity to open or close the gas channel;
the biasing member is arranged in the gas side valve cavity, and applies biasing force towards opening the gas channel to the valve core through the liquid blocking soft film;
when the biasing force is larger than the pressure of the liquid channel, the valve core moves towards the direction of the liquid channel, and the liquid-blocking soft film deforms under the action of the biasing force and/or the pressure in the gas channel so as to open the gas channel; conversely, the valve core moves reversely to close the gas channel.
The pressure regulating device is connected with the biasing force piece and used for regulating the biasing force applied by the biasing force piece to the valve core.
The pressure regulating device is a screw rod, is in threaded connection with the valve body and stretches into the gas side valve cavity to be connected with the biasing force piece, the biasing force piece is a spring, and the screw rod is rotated to be used for regulating the compression amount of the spring.
The gas channel comprises an inner side connecting channel used for being communicated with the inside of the tank body and an outer side connecting channel used for being communicated with the outside of the tank body, and the gas side valve cavity is connected with the inner side connecting channel and the outer side connecting channel.
An annular groove communicated with the inner side communication channel is formed in the inner side wall of the valve cavity, and the annular groove is matched with the liquid blocking soft film and the valve core to open or close the gas channel.
The valve core is a sphere.
And a slope inclined in the direction beneficial to the valve core to open the gas channel is formed in the inner side wall of the valve cavity on the path of the valve core to open or close the gas channel.
The valve core is a cylinder or a cone with the shape matched with that of the valve cavity, and the axis of the cylinder or the axis of the cone are arranged in the same direction as the moving direction of the cylinder or the axis of the cone.
The liquid blocking soft film is a cup-shaped soft film, the circumferential side wall of the cup-shaped soft film is used for disconnecting the communication between the gas channel and the outside, the bottom wall of the cup-shaped soft film is abutted to the biasing force piece, the opening of the cup-shaped soft film faces the liquid channel, and the valve core moves in the cup-shaped soft film.
The valve body comprises a valve seat and a valve cover, the valve cavity is formed in the valve seat, the gas channel is formed on the valve seat, and the liquid channel is formed on the valve cover.
The opening of the cup-shaped soft film is also provided with an edge which radially expands outwards, and the edge is clamped between the valve seat and the valve cover.
The liquid channel is a liquid inlet formed on the valve cover.
The lowest end of the liquid inlet of the liquid channel is the same as or slightly lower than the lower end of the inner side wall of the liquid side valve cavity.
The above technical solution of the invention has the following advantages over the prior art,
1. in the leak-proof emptying device, a valve body, a liquid-blocking soft film, a valve core and a biasing force piece are arranged at the lower part of a tank body, the valve body is formed with a valve cavity, and a liquid channel communicated with the valve cavity and a gas channel communicated with the inside and the outside of the tank body through the valve cavity are formed on the valve body; the liquid-blocking soft film is arranged between the gas channel and the liquid channel and seals and separates the valve cavity into a liquid side valve cavity and a gas side valve cavity; the valve core is arranged in the liquid side valve cavity and is matched with the liquid blocking soft film and the inner side wall of the valve cavity to open or close the gas channel; the biasing member is arranged in the gas side valve cavity, and applies biasing force towards opening the gas channel to the valve core through the liquid blocking soft film; when the biasing force is larger than the pressure of the liquid channel, the valve core moves towards the direction of the liquid channel, and the liquid-blocking soft film deforms under the action of the biasing force and/or the pressure in the gas channel so as to open the gas channel; on the contrary, the valve core moves reversely to close the gas channel, namely, the gas channel and the liquid channel are separated through the liquid blocking soft film, the gas channel is opened and closed through the matching of the valve core and the valve cavity, so that when the material liquid is used, the gas channel can react immediately, the pressure in the tank body is reduced, and the leakage-proof emptying device can realize the technical effect achieved by the combined action of a plurality of parts in the prior art, and has the advantages of simple structure and low manufacturing cost.
2. The leakage-proof emptying device further comprises a pressure regulating device connected with the biasing force piece and used for regulating the biasing force applied by the biasing force piece to the valve core, so that the leakage-proof emptying device can be suitable for feed liquid without viscosity, and can be widely applied according to feed liquid with different viscosities.
3. In the leakage-proof emptying device, the pressure regulating device is a screw rod, is in threaded connection with the valve body and extends into the gas side valve cavity to be connected with the biasing force piece, the biasing force piece is a spring, and the screw rod is rotated to regulate the compression amount of the spring, so that the leakage-proof emptying device is simple in structure and further reduces the production cost.
4. In the leakage-proof emptying device, the valve core is a sphere, a slope which is inclined in the direction of opening the gas channel by the valve core is formed in the inner side wall of the valve cavity on the path of opening or closing the gas channel by the valve core, when the feed liquid is used, the valve body can open the gas channel more easily under the action of the slope, and the viscosity of the viscous feed liquid can be overcome more easily in the use environment of the viscous feed liquid.
5. In the leak-proof emptying device, the liquid-blocking soft film is a cup-shaped soft film, the circumferential side wall of the cup-shaped soft film is used for disconnecting the communication between the gas channel and the outside, the bottom wall of the cup-shaped soft film is abutted with the biasing force piece, the opening of the cup-shaped soft film faces the liquid channel, and the valve core moves in the cup-shaped soft film.
6. In the leak-proof emptying device, the opening of the cup-shaped soft film is also provided with the edge which radially expands outwards, the edge is clamped between the valve seat and the valve cover, the structure is simple, the sealing is easier to realize, and the effect is better.
7. In the leakage-proof emptying device, the lowest end of the liquid inlet of the liquid channel is the same as or slightly lower than the lower end of the inner side wall of the liquid side valve cavity, even if the liquid is easier to flow into and out of the liquid channel and the liquid side valve cavity through the liquid inlet.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
FIG. 1 is an axial cross-sectional view of a leak-proof evacuation device in accordance with an embodiment of the present invention in a closed position;
FIG. 2 is an axial cross-sectional view of an embodiment of the leak-proof evacuation apparatus of the present invention in an open position;
fig. 3 is an axial cross-sectional view of the leak-proof evacuation apparatus of one embodiment of the present invention disposed on the bottom wall of the canister in an open condition.
The reference numerals in the drawings are as follows: 1-valve body, 11-valve cavity, 111-liquid side valve cavity, 112-gas side valve cavity, 12-liquid channel, 13-gas channel, 131-inner connecting channel, 132-outer connecting channel, 133-annular groove, 2-liquid-blocking soft film, 3-valve core, 4-valve cover, 5-pressure regulating device, 6-biasing member, 7-tank body and 8-exhaust pipeline.
Detailed Description
Fig. 1 illustrates the leak-proof emptying device in this embodiment, which is disposed at the lower part of the tank 7 and includes a valve body 1, a liquid-blocking flexible film 2, a valve core 3 and a biasing member 6, wherein the valve body 1 is formed with a valve cavity 11, and the valve body 1 is formed with a liquid channel 12 communicating with the valve cavity 11 and a gas channel 13 communicating with the inside and the outside of the tank 7 through the valve cavity 11; the liquid-blocking flexible film 2 is arranged between the gas channel 13 and the liquid channel 12, and the valve cavity 11 is hermetically separated into a liquid-side valve cavity 111 and a gas-side valve cavity 112, that is, the liquid-side valve cavity 111 and the gas-side valve cavity 112 are not mutually in gas or liquid communication through the arrangement of the liquid-blocking flexible film 2; the valve core 3 is arranged in the liquid side valve cavity 111 and is matched with the liquid blocking soft film 2 and the inner side wall of the valve cavity 11 to open or close the gas channel 13; the biasing member 6 is disposed in the gas-side valve chamber 112, and applies a biasing force toward opening the gas passage 13 to the valve element 3 through the liquid-blocking flexible film 2; when the biasing force is larger than the pressure of the liquid channel 12, the valve core 3 moves towards the direction of the liquid channel 12, and the liquid-blocking soft film 2 deforms under the action of the biasing force and/or the pressure in the gas channel 13 so as to open the gas channel 13; conversely, the spool 3 moves in the reverse direction to close the gas passage 13.
In addition, in the leak-proof emptying device in this embodiment, a pressure regulating device 5 may be further provided, where the pressure regulating device 5 is connected to the biasing force member 6, and is used to regulate the magnitude of the biasing force applied by the biasing force member 6 to the valve core 3, so that the leak-proof emptying device is applicable to a material liquid without viscosity, and is widely applicable.
The pressure regulating device 5 is a screw rod, is in threaded connection with the valve body 1 and extends into the gas side valve cavity 112 to be connected with the biasing force piece 6, the biasing force piece 6 is a spring, and the screw rod is rotated to regulate the compression amount of the spring.
The gas passage 13 includes an inner side connecting passage 131 for communicating with the inside of the tank 7 and an outer side connecting passage 132 for communicating with the outside of the tank 7, and the gas side valve chamber 112 connects the inner side connecting passage 131 and the outer side connecting passage 132.
In addition, an annular groove 133 communicating with the inner connecting channel 131 may be formed on the inner side wall of the valve cavity 11, and the annular groove 133 cooperates with the liquid-blocking flexible membrane 2 and the valve core 3 to open or close the gas channel 13.
In this embodiment, the valve core 3 is a sphere. The inner side wall of the valve cavity 11 is positioned on the path of the valve core 3 for opening or closing the gas channel 13, and a slope inclined in the direction which is beneficial to the valve core 3 to open the gas channel 13 can be formed.
The valve body 1 comprises a valve seat and a valve cover 4, the valve cavity 11 is formed in the valve seat, the gas channel 13 is formed on the valve seat, and the liquid channel 12 is formed on the valve cover 4. The liquid passage 12 is a liquid inlet formed on the valve cover 4, and the lowest end of the liquid inlet is the same as or slightly lower than the lower end of the inner side wall of the liquid side valve cavity 111, so that the liquid is easier to enter and exit.
The liquid blocking soft film 2 is a cup-shaped soft film, the circumferential side wall of the cup-shaped soft film is used for disconnecting the communication between the gas channel 13 and the outside, the bottom wall of the cup-shaped soft film is abutted to the biasing force piece 6, the opening of the cup-shaped soft film faces the liquid channel 12, and the valve core 3 moves in the cup-shaped soft film. Of course, the liquid-blocking flexible film 2 may be of other shapes as long as separation of the gas channel 13 and the liquid channel 12 is achieved
The opening part of the cup-shaped soft film can be further provided with an edge which expands outwards and radially, the edge is clamped between the valve seat and the valve cover 4, and the fixing and sealing effects are better.
When the leak-proof emptying device in this embodiment is applied to a gas supply tank, the gas supply tank includes a tank body, the leak-proof emptying device is disposed on a circumferential side wall of a lower portion of the tank body 7, and the liquid-side valve cavity 111 and the gas-side valve cavity 112 are horizontally distributed, that is, horizontally disposed. An exhaust pipeline 8 is arranged at one end, close to the inner side of the tank body 7, of the gas channel 13 in the leakage-proof emptying device, and a pipe orifice extending out of the exhaust pipeline 8 is always higher than the liquid level of liquid in the tank body 7.
As an alternative embodiment, the leak-proof emptying device may be replaced by being disposed on the bottom wall of the tank 7, and the liquid side valve cavity 111 and the gas side valve cavity 112 are vertically distributed, so that the liquid is closed when the liquid is used up, and the waste of the liquid is less. The valve core 3 may be replaced by a cylinder or a cone, and the axis of the cylinder or the cone is arranged in the same direction as the moving direction of the cylinder or the cone, as shown in fig. 3.
In use, as shown in fig. 1, the gas supply tank is filled with liquid, the nozzle of the exhaust pipe 8 extends out of the liquid level of the liquid in the tank 7, high-pressure gas is filled into the gas supply tank, the supply pipe extends into the gas supply tank to the bottom of the gas supply tank, the gas pushes the liquid in the gas supply tank to continuously discharge from the supply pipe, at this time, the liquid channel 12 pushes the valve core 3 from the right side, the biasing force element 6 pushes the valve core 3 from the left side, so that the valve core 3 is in a static state, the valve core 3 blocks the outlet of the inner connecting channel 131 in the valve cavity 11, namely, the annular groove 133, when the liquid level of the liquid is lower than the liquid channel 12 in the leak-proof emptying device, i.e. no liquid flows into the liquid channel 12 to push the valve core 3, only the biasing force on the left side is saved, so that the valve core 3 moves rightwards, when the valve core 3 moves and breaks away from the supporting function of the liquid blocking soft membrane 2, under the action of the high-pressure gas, the gas in the gas channel 13 deforms the liquid blocking soft membrane 2, so that the valve core 3 blocks the outlet of the inner connecting channel 131 in the valve cavity 11, namely, the pressure of the gas flowing from the outer connecting channel is reduced from the inner connecting channel 131, and the working procedure is not affected.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (14)
1. The leakage-proof emptying device is arranged at the lower part of the tank body (7) and is characterized by comprising a valve body (1), wherein a valve cavity (11) is formed on the valve body (1), and a liquid channel (12) communicated with the valve cavity (11) and a gas channel (13) communicated with the inside and the outside of the tank body (7) through the valve cavity (11) are formed on the valve body (1);
the liquid-blocking soft film (2) is arranged between the gas channel (13) and the liquid channel (12) and is used for sealing and separating the valve cavity (11) into a liquid side valve cavity (111) and a gas side valve cavity (112); and
the valve core (3) is arranged in the liquid side valve cavity (111) and is matched with the liquid blocking soft film (2) and the inner side wall of the valve cavity (11) to open or close the gas channel (13);
a biasing member (6) provided in the gas side valve chamber (112) and applying a biasing force to the valve element (3) toward opening the gas passage (13) through the liquid blocking soft film (2);
when the biasing force is larger than the pressure of the liquid channel (12), the valve core (3) moves towards the direction of the liquid channel (12), and the liquid-blocking soft film (2) deforms under the action of the biasing force and/or the pressure in the gas channel (13) so as to open the gas channel (13); conversely, the valve core (3) moves reversely to close the gas channel (13).
2. Leak-proof evacuation apparatus according to claim 1, further comprising pressure regulating means (5) connected to said biasing member (6) for regulating the magnitude of the biasing force exerted by said biasing member (6) on said valve cartridge (3).
3. The leakage-proof emptying device according to claim 2, characterized in that the pressure regulating device (5) is a screw, is in threaded connection with the valve body (1) and extends into the gas-side valve cavity (112) to be connected with the biasing force member (6), the biasing force member (6) is a spring, and the screw is rotated to regulate the compression amount of the spring.
4. A leak-proof evacuating device as claimed in any one of claims 1-3, wherein said gas passage (13) comprises an inner side connecting passage (131) for communicating with the inside of said tank (7) and an outer side connecting passage (132) for communicating with the outside of said tank (7), said gas side valve chamber (112) connecting said inner side connecting passage (131) and said outer side connecting passage (132).
5. The leak-proof evacuating device according to claim 4, wherein an annular groove (133) communicating with said inner communicating passage (131) is formed in an inner side wall of said valve chamber (11), and said annular groove (133) cooperates with said liquid-blocking soft film (2) and said valve core (3) to open or close said gas passage (13).
6. Leak-proof evacuation apparatus according to claim 4, wherein the valve element (3) is a sphere.
7. The leak-proof evacuating device according to claim 6, wherein a slope inclined in a direction in which the valve core (3) opens the gas passage (13) is formed in the inner side wall of the valve chamber (11) on a path in which the valve core (3) opens or closes the gas passage (13).
8. Leak-proof evacuation device according to claim 7, characterized in that the valve element (3) is a cylinder or cone with a shape adapted to the valve chamber (11), the axis of which is arranged in the same direction as the direction of movement.
9. Leak-proof evacuation apparatus according to claim 8, wherein the liquid-blocking flexible membrane (2) is a cup-shaped flexible membrane, the circumferential side wall of which is adapted to interrupt the communication of the gas passage (13) with the outside, the bottom wall of which is in abutment with the biasing force member (6), the opening of which is directed toward the liquid passage (12), and the valve cartridge (3) is movable in the cup-shaped flexible membrane.
10. Leak-proof evacuation device according to claim 9, wherein the valve body (1) comprises a valve seat and a valve cover (4), the valve chamber (11) being formed in the valve seat, the gas passage (13) being formed in the valve seat, the liquid passage (12) being formed in the valve cover (4).
11. Leak-proof evacuation apparatus according to claim 10, wherein the opening of the cup-shaped flexible membrane is further provided with an outwardly radially extending rim, which rim is sandwiched between the valve seat and the valve cover (4).
12. Leak-proof evacuation device according to claim 8, wherein the valve body (1) comprises a valve seat and a valve cover (4), the valve chamber (11) being formed in the valve seat, the gas passage (13) being formed in the valve seat, the liquid passage (12) being formed in the valve cover (4).
13. Leak-proof evacuation apparatus according to claim 12, wherein the liquid inlet of the liquid channel (12) is formed in the valve cap (4).
14. The leak-proof draining apparatus according to claim 13, wherein the lowest end of the liquid inlet of the liquid passage (12) is the same as or slightly lower than the lower end of the inner side wall of the liquid-side valve chamber (111).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711364827.0A CN109931425B (en) | 2017-12-18 | 2017-12-18 | Leak protection emptying devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711364827.0A CN109931425B (en) | 2017-12-18 | 2017-12-18 | Leak protection emptying devices |
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| Publication Number | Publication Date |
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| CN109931425A CN109931425A (en) | 2019-06-25 |
| CN109931425B true CN109931425B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711364827.0A Active CN109931425B (en) | 2017-12-18 | 2017-12-18 | Leak protection emptying devices |
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| CN (1) | CN109931425B (en) |
Families Citing this family (1)
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| CN115784472B (en) * | 2022-12-23 | 2023-10-20 | 浙江荣凯科技发展股份有限公司 | Dosing device of sewage hard-removing treatment equipment |
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| DE2451305A1 (en) * | 1974-10-29 | 1976-05-06 | Leinemann Co Flammenfilter | Vessel overfilling protection device - has valve plug with float set to higher pressure than vent valve |
| SE9301459D0 (en) * | 1993-04-29 | 1993-04-29 | Itt Flygt Ab | DEVICE FOR ACHIEVING CIRCULATION IN PUMP STATIONS |
| ES2048996T3 (en) * | 1989-08-07 | 1994-04-01 | Bendix Espa A S A | DISCHARGE VALVE FOR HYDRAULIC CIRCUITS. |
| CN2315400Y (en) * | 1997-07-17 | 1999-04-21 | 周贵留 | Floating tube type liquid releasing valve |
| CN101235926A (en) * | 2007-02-01 | 2008-08-06 | 赵志根 | Automatic liquid-retarding air bleeder |
| CN101287940A (en) * | 2005-10-03 | 2008-10-15 | 株式会社美姿把 | Pressure control device |
| CN101722120A (en) * | 2009-12-16 | 2010-06-09 | 袁祥生 | Liquid storage and pressure output device |
| CN201580690U (en) * | 2009-10-27 | 2010-09-15 | 袁祥生 | Liquid storing and pressure output device |
| CN207893183U (en) * | 2017-12-18 | 2018-09-21 | 内蒙古蒙牛乳业（集团）股份有限公司 | A kind of leakproof emptier |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017132098A (en) * | 2016-01-27 | 2017-08-03 | セイコーエプソン株式会社 | Liquid injection device and control method for the same |
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2017
- 2017-12-18 CN CN201711364827.0A patent/CN109931425B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2451305A1 (en) * | 1974-10-29 | 1976-05-06 | Leinemann Co Flammenfilter | Vessel overfilling protection device - has valve plug with float set to higher pressure than vent valve |
| ES2048996T3 (en) * | 1989-08-07 | 1994-04-01 | Bendix Espa A S A | DISCHARGE VALVE FOR HYDRAULIC CIRCUITS. |
| SE9301459D0 (en) * | 1993-04-29 | 1993-04-29 | Itt Flygt Ab | DEVICE FOR ACHIEVING CIRCULATION IN PUMP STATIONS |
| CN2315400Y (en) * | 1997-07-17 | 1999-04-21 | 周贵留 | Floating tube type liquid releasing valve |
| CN101287940A (en) * | 2005-10-03 | 2008-10-15 | 株式会社美姿把 | Pressure control device |
| CN101235926A (en) * | 2007-02-01 | 2008-08-06 | 赵志根 | Automatic liquid-retarding air bleeder |
| CN201580690U (en) * | 2009-10-27 | 2010-09-15 | 袁祥生 | Liquid storing and pressure output device |
| CN101722120A (en) * | 2009-12-16 | 2010-06-09 | 袁祥生 | Liquid storage and pressure output device |
| CN207893183U (en) * | 2017-12-18 | 2018-09-21 | 内蒙古蒙牛乳业（集团）股份有限公司 | A kind of leakproof emptier |
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| CN109931425A (en) | 2019-06-25 |
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