CN109931424B - Pneumatic feeding system - Google Patents
Pneumatic feeding system Download PDFInfo
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- CN109931424B CN109931424B CN201711364467.4A CN201711364467A CN109931424B CN 109931424 B CN109931424 B CN 109931424B CN 201711364467 A CN201711364467 A CN 201711364467A CN 109931424 B CN109931424 B CN 109931424B
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- 239000007788 liquid Substances 0.000 claims abstract description 184
- 239000012528 membrane Substances 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 16
- 239000011521 glass Substances 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
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Abstract
The invention relates to a feeding system, in particular to a pneumatic feeding system and a method thereof, which are suitable for continuous feeding of liquid, in particular to continuous feeding of feed liquid with high viscosity. The device comprises a gas supply tank, a gas discharge tank and a gas discharge device, wherein the gas supply tank is used for containing feed liquid, a high-pressure gas filling channel and a feed liquid discharge channel are arranged on the gas supply tank, and the feed liquid flows out of the feed liquid discharge channel under the pushing action of the high-pressure gas; the leakage-proof emptying device is arranged at the lower part of the gas supply tank, is communicated with the gas supply tank and the external atmosphere when the liquid level of the feed liquid is lower than a set height and is used for reducing the pressure in the gas supply tank. The invention aims to solve the technical problems that the pneumatic feeding system in the prior art is complex in structure and high in manufacturing cost, and further provides the pneumatic feeding system with simple structure and low manufacturing cost.
Description
Technical Field
The invention relates to a feeding system, in particular to a pneumatic feeding system which is suitable for continuous feeding of liquid, in particular to continuous feeding of feed liquid with high viscosity.
Background
The Chinese patent document CN206407631U discloses an automatic feeding device for a constant pressure feeding system, which comprises a first tank body, a second tank body, a weighing device and a main controller, wherein an output interface of the second tank body is connected with an input interface of the first tank body through a pipeline, an electric control feeding valve is arranged on the pipeline, a first air inlet is arranged on the first tank body, a second air inlet is arranged on the second tank body, the first air inlet and the second air inlet are respectively used for accessing compressed air, the output interface of the first tank body is connected with an output pipeline, an electric control discharging valve is arranged on the output pipeline, the weighing device, the electric control feeding valve and the electric control discharging valve are respectively and electrically connected with the main controller, the first tank body is arranged on the weighing device, and the weighing device is used for measuring weight data of the first tank body and sending the weight data to the main controller in an electric signal mode.
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.
In addition, in the prior art, when the material liquid in the first tank is depleted, the feeding valve is opened, the electronic pressure regulating valve is regulated at the same time, so that the air pressure in the second tank is higher than the pressure in the first tank, the pressure in the first tank is reduced, and the material liquid in the second tank flows into the first tank, and at the moment, if the air pressure in the first tank is reduced, the pressure of the feeding direction pipeline and the filling position is inevitably influenced; in addition, the pressure is increased to the second tank, the feed liquid continuously flows into the first tank, and for the first tank, on one hand, continuous feed is needed, and on the other hand, the feed liquid level in the tank is increased, the two-direction variables, namely, the pressure supply in the two tanks, are changed, and in the technical scheme, only the gravity detection of the first tank is not described, and the comparison operation in the detection and control aspects of the pressure are not described, so that the constant feed pressure and the constant pressure state are difficult to ensure, and the filling work of the feed target position is necessarily influenced.
Disclosure of Invention
Therefore, the first technical problem to be solved by the invention is that the pneumatic feeding system in the prior art has a complex structure and high manufacturing cost, and further provides a pneumatic feeding system with a simple structure and low manufacturing cost.
The second technical problem to be solved by the invention is that the pneumatic feeding system in the prior art is difficult to ensure the constant feeding pressure, and further provides a pneumatic feeding system with more constant feeding pressure.
In order to solve the technical problems, the pneumatic feeding system comprises a gas feeding tank, a high-pressure gas filling channel and a feed liquid discharging channel, wherein the gas feeding tank is used for containing feed liquid, and the feed liquid flows out of the feed liquid discharging channel under the pushing action of the high-pressure gas;
The leakage-proof emptying device is arranged at the lower part of the gas supply tank, when the liquid level of the feed liquid is lower than the set height, the leakage-proof emptying device is communicated with the gas supply tank and the external atmosphere and used for reducing the pressure in the gas supply tank, and compared with the prior art, the leakage-proof emptying device saves a plurality of parts, and has simpler structure and lower manufacturing cost.
The leak-proof emptying device 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 gas supply tank 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 liquid 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. In addition, through the use of leak protection emptying devices, do not influence the feed pressure in other gas feed jar, guarantee that the pressure of whole pneumatic feed system is invariable, the operation is also very simple.
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 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 liquid inlet of the liquid channel is 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 anti-leakage emptying device also comprises an exhaust pipeline, wherein a pipe orifice extending out of one end of the exhaust pipeline is always higher than the liquid level of the feed liquid in the gas feed tank, and the other end of the exhaust pipeline is communicated with the gas channel, so that the independent action of the feed liquid and high-pressure gas on the anti-leakage emptying device is ensured, and the feed liquid cannot enter the gas channel.
The leakage-proof emptying device is arranged on the circumferential side wall of the gas supply tank, and the liquid side valve cavity and the gas side valve cavity are horizontally distributed and are convenient to install.
The leakage-proof emptying device is arranged on the bottom wall of the gas supply tank, the liquid side valve cavity and the gas side valve cavity are distributed up and down, and in another arrangement mode, liquid is closed when the liquid is used up in the arrangement mode, the waste of the liquid is small, the liquid is parallel to the previous embodiment, the liquid can be selected according to actual conditions, and the adaptability is strong.
The feed liquid discharge channel is arranged at the bottom of the gas feed tank, and compared with the prior art that the feed liquid is stretched into the bottom of the gas feed tank through a pipe, the feed liquid is more completely used, and less waste is caused.
The gas supply tanks are more than two, the high-pressure gas charging channels and the feed liquid discharging channels on the gas supply tanks are respectively provided with a control valve, the control valves are connected with a controller, and the controller controls the opening and closing of the control valves.
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 a schematic view of a pneumatic feed system according to an embodiment of the present invention;
FIG. 2 is an axial cross-sectional view of the leak-proof evacuation device in an embodiment of the invention in a closed position;
FIG. 3 is an axial cross-sectional view of an embodiment of the invention in an open position;
Fig. 4 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: the device comprises a 1-gas supply tank, a 11-first gas supply tank, a 12-second gas supply tank, a 21-tank body, a 22-sealing end cover, a 3-locking hand valve, a 4-pressure display meter, a 5-pressure regulating valve, a 6-spiral scraper view mirror 7-leak-proof emptying device, a 71-valve body, a 711-valve cavity, a 7111-liquid side valve cavity, a 7112-gas side valve cavity, a 712-liquid channel, a 713-gas channel, a 7131-inner connecting channel, a 7132-outer connecting channel, a 7133-annular groove, a 72-liquid-blocking soft film, a 73-valve core, a 74-valve cover, a 75-pressure regulating device, a 76-biasing force piece, an 8-feed liquid discharge channel, a 90-throttle valve, a 91-one-way stop valve, a 10-controller and a 20-exhaust pipeline.
Detailed Description
Fig. 1 shows a pneumatic feeding system according to the present embodiment, which includes a gas feeding tank 1 and a leak-proof emptying device 7, wherein the gas feeding tank 1 is used for containing a feed liquid, a high-pressure gas charging channel and a feed liquid discharging channel 8 are arranged on the gas feeding tank 1, and the feed liquid flows out from the feed liquid discharging channel 8 under the pushing action of the high-pressure gas; the leakage-proof emptying device 7 is arranged at the lower part of the gas supply tank 1, when the liquid level of the feed liquid is lower than the set height, the leakage-proof emptying device 7 is communicated with the gas supply tank 1 and the external atmosphere and used for reducing the pressure in the gas supply tank 1, and compared with the prior art, the leakage-proof emptying device 7 saves a plurality of parts, and has simpler structure and lower manufacturing cost.
Fig. 2 illustrates the leak-proof emptying device 7 in this embodiment, which is disposed at the lower part of the gas supply tank 11 and includes a valve body 71, a liquid-blocking flexible film 72, a valve core 73 and a biasing member 76, wherein the valve body 71 is formed with a valve cavity 711, and the valve body 71 is formed with a liquid channel 712 communicating with the valve cavity 711 and a gas channel 713 communicating with the inside and the outside of the tank 21 through the valve cavity 711; the liquid-blocking flexible film 72 is disposed between the gas channel 713 and the liquid channel 712, and seals the valve cavity 711 into a liquid-side valve cavity 7111 and a gas-side valve cavity 7112, that is, the liquid-side valve cavity 7111 and the gas-side valve cavity 7112 are not mutually in air or liquid communication by the arrangement of the liquid-blocking flexible film 72; the valve core 73 is arranged in the liquid side valve cavity 7111, and is matched with the liquid blocking soft film 72 and the inner side wall of the valve cavity 711 to open or close the gas channel 713; a biasing member 76 is provided in the liquid-side valve chamber 7111, and biases the valve body 73 toward opening the gas passage 713 through a liquid-blocking soft film 72; when the biasing force is greater than the pressure of the liquid passage 712, the valve body 73 moves toward the liquid passage 712, and the liquid blocking flexible film 72 deforms under the biasing force and/or the pressure in the gas passage 713 to open the gas passage 713; conversely, the spool 73 moves in the opposite direction to close the gas passage 713, as shown in fig. 3.
In addition, in the leak-proof emptying device 7 in this embodiment, a pressure regulating device 75 may be further provided, where the pressure regulating device 75 is connected to the biasing force member 76, and is used to regulate the magnitude of the biasing force applied by the biasing force member 76 to the valve core 73, so that the leak-proof emptying device is applicable to a material liquid without viscosity, and is widely applicable. The pressure adjusting device 75 is a screw, is in threaded connection with the valve body 71 and extends into the gas side valve cavity 7112 to be connected with the biasing force member 76, the biasing force member 76 is a spring, and the screw is rotated to adjust the compression amount of the spring.
The gas passage 713 includes an inner communication passage 7131 for communicating with the inside of the tank 21 and an outer communication passage 7132 for communicating with the outside of the tank 21, and the gas-side valve chamber 7112 connects the inner communication passage 7131 and the outer communication passage 7132.
In addition, an annular groove 7133 communicating with the inner communicating channel 7131 may be formed on the inner side wall of the valve chamber 711, and the annular groove 7133 cooperates with the liquid blocking flexible film 72 and the valve core 73 to open or close the gas passage 713.
The valve core 73 in this embodiment is a sphere. A slope inclined in a direction that is advantageous for the valve body 73 to open the gas passage 713 may be formed in the inner side wall of the valve chamber 711 on a path that the valve body 73 opens or closes the gas passage 713.
The valve body 71 includes a valve seat in which the valve cavity 711 is formed, and a valve cover 74 in which the gas passage 713 is formed, and the liquid passage 712 is formed in the valve cover 74. The liquid channel 712 is a liquid inlet formed on the valve cover 74, 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 7111, so that the liquid is easier to enter and exit.
The liquid-blocking flexible membrane 72 is a cup-shaped flexible membrane, a circumferential side wall of the cup-shaped flexible membrane is used for disconnecting the communication between the gas channel 713 and the outside, a bottom wall of the cup-shaped flexible membrane is abutted to the biasing force piece 76, an opening of the cup-shaped flexible membrane faces the liquid channel 712, and the valve core 73 moves in the cup-shaped flexible membrane. Of course, the liquid-blocking flexible film 72 may have other shapes as long as separation between the gas passage 713 and the liquid passage 712 is achieved.
The opening of the cup-shaped flexible membrane may also be provided with an outwardly radially extending edge which is sandwiched between the valve seat and the valve cover 74 for better securing and sealing.
When the leak-proof evacuation device 7 in the present embodiment is applied to the gas supply tank 1, the gas supply tank 1 includes a tank body 21, the leak-proof evacuation device 7 is disposed on a lower circumferential side wall of the tank body 21, and the liquid-side valve chamber 7111 and the gas-side valve chamber 7112 are horizontally distributed, that is, horizontally disposed. An exhaust pipe 20 is arranged at one end of the gas channel 713 in the leakage-proof emptying device 7, which is close to the inner side of the tank body 21, and the pipe opening of the exhaust pipe 20 is always higher than the liquid level of the liquid in the tank body 21.
As an alternative embodiment, the leak-proof emptying device 7 may be replaced by being disposed on the bottom wall of the tank 21, and the liquid side valve cavity 7111 and the gas side valve cavity 7112 are vertically distributed, so that the liquid is closed when the liquid is used up, and the waste of the liquid is less. The spool 73 may be replaced by a cylinder or a cone, the axis of which is arranged in the same direction as the moving direction thereof, as shown in fig. 4.
In use, as shown in fig. 2, the gas supply tank 1 is filled with liquid, the orifice of the exhaust pipe 20 extends higher than the liquid level of the liquid in the tank 21, high-pressure gas is filled into the gas supply tank 1, the supply pipe extends into the gas supply tank 1 to the bottom or is connected from the bottom, the gas pushes the liquid in the gas supply tank 1 to continuously discharge from the supply pipe, at this time, the liquid channel 712 pushes the valve core 73 from the right side, the biasing force member 76 pushes the valve core 73 from the left side, so that the valve core 73 is in a static state, the valve core 73 blocks the outlet of the inner communicating channel 7131 in the valve cavity 711, namely, the annular groove 7133, when the liquid level of the liquid is lower than that of the liquid channel 712 in the leak-proof emptying device 7, namely, no liquid flows into the liquid channel 712, only the left side biasing force is saved, so that the valve core 73 moves rightwards, and when the valve core 73 moves and breaks away from the supporting function of the liquid blocking soft membrane 72, the gas in the gas channel is pushed to the liquid blocking soft membrane 72 from the right side, so that the gas in the gas channel is compressed to the liquid blocking soft membrane 72 from the right side, so that the gas channel is compressed to deform from the inner side of the valve core 73, and the gas channel 7131 is not compressed, and the gas is discharged from the outer side of the valve cavity 713 to the working procedure 32, and the working procedure is not influenced by the high pressure, and the pressure channel is discharged from the outer side of the gas channel 71channel 711.
In order to ensure that the feed liquid and the high-pressure gas act on the leak-proof emptying device 7 independently, the feed liquid does not enter the gas channel 713, and the embodiment further comprises an exhaust pipe 20, wherein a pipe orifice extending out of one end of the exhaust pipe 20 is always higher than the liquid level of the feed liquid in the gas feed tank 1, and the other end of the exhaust pipe is communicated with the gas channel 713.
The feed liquid discharge channel 8 is arranged at the bottom of the gas feed tank 1, and compared with the prior art that the feed liquid is stretched into the bottom of the gas feed tank through a pipe, the feed liquid is more completely used, and less waste is caused. Of course, it is also possible to replace the ducts extending from the top to the bottom in the prior art.
For convenience of coordination and control, when the number of the gas supply tanks 1 is more than two, control valves are respectively arranged on the high-pressure gas charging channel and the feed liquid discharging channel 8 on each gas supply tank 1, the control valves are connected with a controller 10, and the controller 10 controls the opening and closing of the control valves.
The gas supply tank 1 comprises a tank body 21 and a sealing end cover 22 sealed at the top of the tank body 21. The sealing end cover 22 is provided with a pressure display meter and a pressure regulating valve 5 which are respectively connected with the controller 10. The lower part of the tank body 21 can be also provided with a spiral scraper sight glass 6 for observing the liquid level of the feed liquid in the tank body 21.
The number of the gas supply tanks 1 can be selected according to actual production, in this embodiment, a feeding system composed of the double gas supply tanks 1 is adopted, in fig. 1, the first gas supply tank 11 and the second gas supply tank 12 connect the feed liquid discharge channels 8 under the two tanks 21 together through three-way pipe fittings, and can be used as feed liquid power sources to feed materials to pipelines, in this embodiment, a control valve on each branch feed liquid discharge channel 8 is a throttle valve 90, and the selection control is performed through the throttle valve 90. A spiral scraper sight glass 6 and a leakage-proof emptying device 7 are respectively arranged below each tank body 21. Each can 21 is provided with a sealing end cap 22. A pressure display gauge 44 and a pressure regulating valve 5 are provided on the seal cover 22.
In the production process, two gas feed tanks 1 are simultaneously filled with the feed liquid with higher viscosity, and the liquid level of the feed liquid can not exceed the upper opening of the exhaust pipeline 20 of the leakage-proof emptying device 7. The sealing end cap 22 is covered, and all the locking hand valves 3 on each tank body 21 are locked at the same time.
The controller 10 as shown in the figures controls the operation of the pneumatic feed system according to the present invention based on control signals provided by the production line.
The control valve is a one-way stop valve 91, when in use, the controller 10 sends a signal, the one-way stop valve 91 on the first gas supply tank 11 is opened to supply gas into the first gas supply tank 11, meanwhile, the pressure regulating valve 5 on the first gas supply tank 11 is regulated to ensure that the pressure in the first gas supply tank 11 reaches the set supply pressure, the throttle valve 90 on the feed liquid discharge channel 8 on the first gas supply tank 11 is opened, the feed liquid in the first gas supply tank 11 starts to continuously supply feed liquid to the filling station, and the pressure in the tank 21 is stable due to the continuous and stable supply of the gas pressure in the gas supply tank 1, so the supply pressure at the filling station is also constant.
When the residual material liquid in the first gas supply tank 11 is little or used up, the pressure of the material liquid (especially viscous material liquid) acting on the leakage-proof emptying device 7 is reduced, and the gas in the tank body 21 can be rapidly discharged through the exhaust pipeline 20 on the leakage-proof emptying device 7, so that the detection pressure of the pressure display gauge is rapidly reduced and fed back to the controller 10; the controller 10 can timely close the one-way stop valve 91 and the throttle valve 90 on the feed liquid discharge channel 8 to stop the air supply; simultaneously, the one-way stop valve 91 in the second gas supply tank 12 is opened to supply gas to the second gas supply tank 12, the following process is the same as the feeding operation method of the first gas supply tank 11, after the material liquid in the second gas supply tank 12 is used up, the material liquid is switched back to the first gas supply tank 11 to start feeding work, thereby ensuring the continuity of the material liquid in the filling station of the production line, namely, the pressure supplied to the first gas supply tank and the second gas supply tank is constant, when the material liquid in the first gas supply tank is used up, the pressure in the tank is opened to the atmospheric pressure, the material liquid in the first gas supply tank is ensured not to enter gas in the material liquid discharge channel 8 due to the loss of the pressure, and meanwhile, the one-way stop valve 91 for supplying the material liquid to the second gas supply tank is opened, and the material liquid is simultaneously supplied to the first gas supply tank and the second gas supply tank for a small period of time, and the pressure is kept constant, so that the pressure fluctuation is small during the switching.
Because the viscous liquid has strong adhesiveness, the inner wall of the sight glass can be used for drying the liquid, and the amount of the liquid in the tank body 21 cannot be observed from the outside, so that the residual amount of the liquid in the tank body 21 can be observed by manually operating the screw rod to scrape the liquid on the inner wall of the sight glass in the production process. By applying the principle of a communicating vessel, the liquid level in the spiral scraper sight glass 6 is the same as the liquid level in the tank body 21, and when the spiral scraper is turned, if the liquid level is higher than the spiral scraper sight glass 6, the material liquid can rapidly fill the area behind the scraper after the scraper is scraped; if the liquid level is the same as or lower than the mirror transparent area, the scraper scrapes the rear view mirror transparent area, the mirror transparent area appears, and the internal structure is observed.
In the leak-proof emptying device 7 adopted in the embodiment, when the feed liquid in the gas feed tank 1 is higher than the emptying valve, the feed liquid is fully acted on the sphere of the emptying valve under the action of the air pressure above the liquid level, the sphere of the emptying valve moves towards the small end of the cone body, and the exhaust pipeline 20 is blocked by the sealing rubber sleeve of the emptying valve, so that the continuous and stable pressure in the gas feed tank 1 is ensured; when the liquid level is lower than the leakage-proof emptying device 7, the feed liquid at the rear end of the emptying valve ball flows downwards, the acting force is reduced, the high-pressure gas in the tank body 21 can push the liquid-resistant soft film (72) through the exhaust pipeline 20, the liquid is rapidly discharged outwards, and the pressure in the gas feed tank 1 is rapidly reduced. Therefore, the high-pressure gas in the tank body 21 can be prevented from being downwards strung into the feeding pipeline, and the feeding management from the breakdown throttle valve 90 to the filling station end of the production line can be prevented, so that the continuity of the subsequent feeding and filling can be prevented.
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 (16)
1. The pneumatic feeding system is characterized by comprising a gas feeding tank (1) for containing feed liquid, wherein a high-pressure gas charging channel and a feed liquid discharging channel (8) are arranged on the gas feeding tank, and the feed liquid flows out of the feed liquid discharging channel (8) under the pushing action of the high-pressure gas; the leakage-proof emptying device (7) is arranged at the lower part of the gas supply tank (1), and when the liquid level of the feed liquid is lower than a set height, the leakage-proof emptying device (7) is communicated with the gas supply tank (1) and the external atmosphere and is used for reducing the pressure in the gas supply tank (1); the leak-proof emptying device (7) comprises: a valve body (71) provided with a valve cavity (711), wherein a liquid channel (712) communicated with the valve cavity (711) and a gas channel (713) communicated with the inside and the outside of the gas feed tank (1) through the valve cavity (711) are formed on the valve body (71); a liquid blocking soft film (72) disposed between the gas passage (713) and the liquid passage (712) and sealing and separating the valve chamber (711) into a liquid-side valve chamber (7111) and a gas-side valve chamber (7112); the valve core (73) is arranged in the liquid side valve cavity (7111) and is matched with the liquid blocking soft film (72) and the inner side wall of the valve cavity (711) to open or close the gas channel (713); a biasing member (76) provided in the gas-side valve chamber (7112) and configured to apply a biasing force to the valve body (73) toward opening the gas passage (713) through a liquid blocking soft film (72); when the biasing force is larger than the pressure of the liquid channel (712), the valve core (73) moves towards the direction of the liquid channel (712), and the liquid-blocking soft film (72) deforms under the action of the biasing force and/or the pressure in the gas channel (713) so as to open the gas channel (713); conversely, the spool (73) moves in the opposite direction to close the gas passage (713); the device also comprises an exhaust pipeline (20), wherein a pipe orifice extending out of one end of the exhaust pipeline (20) is always higher than the liquid level of the feed liquid in the gas feed tank (1), and the other end of the exhaust pipeline is communicated with the gas channel (713); the leakage-proof emptying device (7) is arranged on the bottom wall of the gas supply tank (1), and the liquid side valve cavity (7111) and the gas side valve cavity (7112) are distributed up and down; or the leakage-proof emptying device (7) is arranged on the circumferential side wall of the gas supply tank (1), and the liquid side valve cavity (7111) and the gas side valve cavity (7112) are horizontally distributed.
2. A pneumatic feed system as claimed in claim 1, further comprising pressure regulating means (75) connected to said biasing member (76) for regulating the amount of biasing force applied by said biasing member (76) to said spool (73).
3. Pneumatic feed system according to claim 2, characterized in that the pressure regulating device (75) is a screw, which is screwed with the valve body (71) and extends into the gas-side valve chamber (7112) to be connected with the biasing force member (76), the biasing force member (76) being a spring, rotating the screw for regulating the compression of the spring.
4. A pneumatic feed system as claimed in any one of claims 1-3, wherein the gas passage (713) comprises an inner side passage (7131) for communicating with the interior of the tank (21) of the gas feed tank (1) and an outer side passage (7132) for communicating with the exterior of the tank (21), the gas side valve chamber (7112) connecting the inner side passage (7131) and the outer side passage (7132).
5. A pneumatic feed system as claimed in claim 4, wherein an annular groove (7133) communicating with the inner communication channel (7131) is formed on the inner side wall of the valve chamber (711), and the annular groove (7133) cooperates with the liquid-blocking flexible membrane (72) and the valve core (73) to open or close the gas channel (713).
6. A pneumatic feed system as claimed in any one of claims 1 to 3, wherein the spool (73) is a sphere.
7. A pneumatic feed system as claimed in claim 6, wherein a slope inclined in a direction in which the valve body (73) opens the gas passage (713) is formed in an inner side wall of the valve chamber (711) on a path in which the valve body (73) opens or closes the gas passage (713).
8. A pneumatic feed system according to any one of claims 1-3, characterized in that the valve element (73) is a cylinder or cone which is adapted to the shape of the valve chamber (711), the axis of the cylinder or cone being arranged in the same direction as the direction of movement.
9. A pneumatic feed system as claimed in any one of claims 1 to 3, wherein the liquid-blocking flexible membrane (72) is a cup-shaped flexible membrane, the circumferential side wall of the cup-shaped flexible membrane being adapted to interrupt communication of the gas passage (713) with the outside, the bottom wall of the cup-shaped flexible membrane being in abutment with the biasing member (76), the opening of the cup-shaped flexible membrane being directed towards the liquid passage (712), the valve cartridge (73) being movable within the cup-shaped flexible membrane.
10. A pneumatic feed system according to claim 9, wherein the valve body (71) comprises a valve seat and a valve cover (74), the valve cavity (711) being formed in the valve seat, the gas passage (713) being formed in the valve seat, the liquid passage (712) being formed in the valve cover (74).
11. Pneumatic feed system according to claim 10, characterized in that the opening of the cup-shaped flexible membrane is further provided with an outwardly radially expanding rim, which rim is sandwiched between the valve seat and the valve cover (74).
12. A pneumatic feed system according to claim 1, wherein the valve body (71) comprises a valve seat and a valve cover (74), the valve cavity (711) being formed in the valve seat, the gas passage (713) being formed in the valve seat, the liquid passage (712) being formed in the valve cover (74).
13. A pneumatic feed system as claimed in any one of claims 10 to 12, wherein the inlet to the liquid passage (712) is formed in the valve cover (74).
14. A pneumatic feed system as claimed in claim 13, wherein the lowest end of the liquid inlet of the liquid passage (712) is the same as or slightly lower than the lower end of the inner side wall of the liquid side valve chamber (7111).
15. A pneumatic feed system as claimed in any one of claims 1 to 3, wherein the feed liquid discharge channel (8) is provided at the bottom of the gas feed tank (1).
16. A pneumatic feed system as claimed in any one of claims 1 to 3, wherein the number of gas feed tanks (1) is two or more, and each of the high pressure gas feed channels and feed liquid discharge channels (8) of the gas feed tanks (1) is provided with a control valve, the control valve is connected to a controller (10), and the controller (10) controls the opening and closing of the control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711364467.4A CN109931424B (en) | 2017-12-18 | 2017-12-18 | Pneumatic feeding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711364467.4A CN109931424B (en) | 2017-12-18 | 2017-12-18 | Pneumatic feeding system |
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| Publication Number | Publication Date |
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| CN109931424A CN109931424A (en) | 2019-06-25 |
| CN109931424B true CN109931424B (en) | 2024-05-28 |
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| CN201711364467.4A Active CN109931424B (en) | 2017-12-18 | 2017-12-18 | Pneumatic feeding system |
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| GB1346511A (en) * | 1970-11-26 | 1974-02-13 | Electrolux Ab | Valve for closing a container outlet |
| AU6245573A (en) * | 1973-11-18 | 1975-06-05 | Consolidated Foods Corporation | Carbonated beverage system |
| US5938409A (en) * | 1996-06-04 | 1999-08-17 | Spirax Sarco, Inc. | Gas powered fluid pump with exhaust assist valve |
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|---|---|
| CN109931424A (en) | 2019-06-25 |
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