CN111804531A - Feeding device capable of eliminating pulses and using method thereof - Google Patents
Feeding device capable of eliminating pulses and using method thereof Download PDFInfo
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- CN111804531A CN111804531A CN202010683163.XA CN202010683163A CN111804531A CN 111804531 A CN111804531 A CN 111804531A CN 202010683163 A CN202010683163 A CN 202010683163A CN 111804531 A CN111804531 A CN 111804531A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
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Abstract
The invention discloses a feeding device for eliminating pulses and a using method thereof, and relates to the field of lithium battery coating, including but not limited to lithium battery diaphragm production, lithium battery pole piece production and lithium battery pole piece surface treatment, wherein the feeding device comprises a pulse suppressor and a feeding channel, the pulse suppressor comprises a closed container, a feeding pipe and a discharging pipe, the upper end of an inner cavity of the closed container is provided with an air chamber, the lower end of the inner cavity of the closed container is provided with a liquid chamber, a piston capable of sliding up and down is arranged between the air chamber and the liquid chamber, the feeding pipe is communicated with the liquid chamber, the discharging pipe is communicated with the liquid chamber and is connected with the feeding channel, the pulse suppressor further comprises an air inlet pipe and an air outlet pipe, one end of the air inlet pipe is communicated with the air chamber. The invention can eliminate the pulse flow generated by the peristaltic pump and ensure the uniform coating of the surface of the coated product.
Description
Technical Field
The invention relates to the technical field of lithium battery coating, in particular to a feeding device for eliminating pulses and a using method thereof.
Background
The peristaltic pump is a fluid conveying device capable of controlling flow rate, and consists of a driver, a pump head and a hose. The peristaltic pump works on the following principle: such as pinching a fluid-filled hose with a finger, the fluid will flow forward as the finger slides forward. The peristaltic pump is powered by a driver, the pump head runs, the rollers in the pump head replace fingers, and the peristaltic pump works by means of pumping efficiency generated by alternately extruding and releasing a plurality of rollers along an elastic hose. The fluid extruded in the hose generates flow output, the hose recovers deformation after pressure disappears, the volume is increased to generate vacuum, and fluid is sucked in, so that repeated feeding is realized.
In the feeding process, the fluid is isolated in the pump pipe and does not contact the pump body, so that the pollution caused by the contact of the fluid and the pump body is effectively avoided. Meanwhile, the peristaltic pump also has the advantages of low shearing force, good sealing performance, simple maintenance, reversible fluid, dry running and the like. Therefore, the peristaltic pump is widely applied to the chemical industry and the pharmaceutical industry.
However, when the peristaltic pump is in operation, the rotating wheel needs to be alternately released, and liquid suck-back is generated at the moment of release, so that the discharged liquid is suddenly reduced, and the pulse delivered by the peristaltic pump is generated. In the coating process of the lithium battery pole piece, coating slurry is conveyed by a peristaltic pump, and due to the influence of pulse flow, the feeding is intermittent and periodic, so that the surface of a slurry roller on a micro-concave roller also has a periodic intermittent phenomenon, and a coating layer generates periodic stripes.
The prior solution to peristaltic pump pulse flow is as follows: 1. the number of the rollers is increased; 2. a pulse suppressor is used. The number of rollers increases and correspondingly the flow rate decreases. The pulse suppressor eliminates the buffer on the basis of the principle that air is more compressible than liquid. The specific structure of the pulse suppressor can be found in a coating material curtain coating machine with the publication number of CN103691618B and a using method thereof. The pulse suppressor comprises a closed cavity, wherein the lower end of the closed cavity is provided with a liquid chamber, and the upper end of the closed cavity is provided with an air chamber. After the fluid enters the pulse suppressor, the volume of a gas chamber on the liquid is reduced when the pulse flow wave crest, and redundant fluid is absorbed; when the pulse flows to the wave trough, the volume of the air chamber is increased, and redundant fluid is released to play a role in eliminating the pulse.
However, the above pulse suppressors have the following technical drawbacks: because the air chamber is closed and the gas quality is constant, the air pressure is also changed after the volume of the air chamber is changed, so that the pressure acting on the fluid in the liquid chamber is not constant, the outflow speed of the fluid is not constant, and a certain pulse phenomenon still exists. That is, the existing pulse suppressors can slow down the pulse flow, but cannot completely eliminate the pulse flow, and the improvement is needed.
Disclosure of Invention
In view of the above technical drawbacks, it is an object of the present invention to provide a pulsation-eliminating feeding device, which can completely eliminate the pulsation generated by a peristaltic pump,
in order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an eliminate feedway of pulse, includes pulse suppressor and feed passage, the pulse suppressor includes closed container, inlet pipe and discharging pipe, closed container inner chamber upper end is air chamber, lower extreme and is the liquid chamber, the piston that can slide from top to bottom separates between air chamber and the liquid chamber, inlet pipe and liquid chamber intercommunication, the discharging pipe communicates with the liquid chamber and is connected with feed passage, the pulse suppressor still includes intake pipe and outlet duct, intake pipe one end is connected with gas holder, middle part with air chamber intercommunication, the other end and is connected with the admission valve, the outlet duct just is connected with the air outlet valve with the air chamber intercommunication.
By adopting the technical scheme, on one hand, the opening and closing of the air inlet valve and the air outlet valve can be used for adjusting the pressure in the air chamber, so that the air pressure acting on the slurry is constant, the outflow rate of the slurry is further ensured to be constant, the pulse flow is eliminated, and the surface of a coated product is ensured to be uniformly coated; on the other hand, the pressure inside the air chamber can be controlled, so that the slurry outflow rate can be adjusted to meet different coating requirements.
The invention is further configured to: still include control system and first pressure sensor, first pressure sensor installs in the air chamber inner wall, admission valve, air outlet valve and first pressure sensor all are connected with the control system electricity.
Through adopting above-mentioned technical scheme, pressure in the air chamber is sensed to first pressure sensor, gives control system with signal transmission, and control system regulates and control the switching of admission valve and air outlet valve automatically, and then guarantees that pressure is invariable or goes up and down to required numerical value in the air chamber.
The invention is further configured to: the discharge pipe is connected with a flow regulating valve and a flowmeter which are electrically connected with a control system.
By adopting the technical scheme, the flow regulating valve can also regulate the outflow rate of the slurry, and the regulating range is enlarged; the flow meter feeds back a slurry outflow rate signal to the control system, and the control system regulates and controls the pressure in the air chamber until the flow rate of the slurry reaches a required value.
The invention is further configured to: the air chamber inner wall is provided with the holding ring, it is provided with second pressure sensor to go up the holding ring downside, the liquid chamber inner wall is provided with down the holding ring, the holding ring upside is provided with third pressure sensor down, second pressure sensor and third pressure sensor all are connected with control system electricity.
By adopting the technical scheme, the slurry flows into the liquid chamber until the piston props against the second pressure sensor, and then the feeding is stopped; when feeding, the piston is lowered continuously until it is against the third pressure sensor, so stopping feeding and feeding again.
The invention is further configured to: the air inlet pipe and the air outlet pipe are both positioned at the upper part of the upper positioning ring; and the feeding pipe and the discharging pipe are both positioned at the lower part of the lower positioning ring.
Through adopting above-mentioned technical scheme, second pressure sensor is difficult for receiving the impact force that flows in gas, and third pressure sensor is difficult for receiving the impact force that flows in the thick liquids, avoids the mistake feedback.
The invention is further configured to: the upper positioning ring and the lower positioning ring are arranged in an inclined mode in opposite directions, and the upper side and the lower side of the edge of the piston are connected with the extrusion strips.
By adopting the technical scheme, on one hand, the contact area between the piston and the closed container is increased by the extrusion strip, and the up-and-down sliding guide effect is good; on the other hand, the second pressure sensor and the third pressure sensor are not easily affected by fluid, and error feedback is avoided.
The invention is further configured to: the top of the closed container is connected with a pressure gauge.
Through adopting above-mentioned technical scheme, the staff of being convenient for sees the inside pressure of air chamber directly perceivedly, does the comparison with first pressure sensor, prevents that first pressure sensor can not in time discover after damaging, avoids the trouble of control inefficacy.
The invention is further configured to: the pulse suppressors are provided with at least two.
By adopting the technical scheme, when one pulse suppressor supplies materials, the other pulse suppressor supplies materials, and the plurality of pulse suppressors work alternately, so that uninterrupted material supply is ensured, and the efficiency is improved.
It is another object of the invention to provide a method of using a feed device with pulse cancellation.
A method of using a feed device for pulse cancellation, comprising the steps of:
s1 pre-feeding: opening an air outlet valve, closing a flow regulating valve, feeding the slurry supplied by a peristaltic pump into a liquid chamber through a feed pipe, and stopping feeding after the slurry reaches a certain height;
s2 pre-intake: closing the air outlet valve, opening the air inlet valve, and allowing the compressed air to enter the air chamber through the air inlet pipe until the pressure of the air chamber reaches a certain value;
s3 feeding: and opening the flow regulating valve, and simultaneously controlling the opening and closing of the air inlet valve and the air outlet valve by the control system to ensure that the pressure of the air chamber is constant, and the slurry flows out of the discharge pipe at a constant speed and then flows into the feeding channel.
By adopting the technical scheme, the whole feeding process is basically automatically controlled by the control system, time and labor are saved, and feeding is stable.
The invention is further configured to: also comprises the following steps:
s4 Prep: the other pulse suppressor which is not supplied carries out the S1 pre-feeding and the S2 pre-air-charging for standby;
s5 switching: after the slurry of the feeding pulse suppressor is lowered to a certain height, the S1 pre-feeding and the S2 pre-air-charging are carried out, and the pulse suppressor which finishes the S4 pre-preparation carries out S3 feeding, so that seamless switching is realized.
By adopting the technical scheme, the pulse suppressors work alternately, uninterrupted feeding is guaranteed, and efficiency is improved.
In conclusion, the invention has the following beneficial effects:
1. the internal pressure of the air chamber is automatically regulated and controlled by a control system, so that the pulse generated by a peristaltic pump is completely eliminated, the flow rate of slurry is ensured to be constant, the coating uniformity of a coating product is improved, and the application range comprises but is not limited to lithium battery diaphragm production, lithium battery pole piece production and lithium battery pole piece surface treatment;
2. the pulse suppressors work alternately to ensure uninterrupted feeding and have high efficiency.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
FIG. 2 is a schematic structural view of the second embodiment;
FIG. 3 is a schematic illustration of the surface of a lithium battery pole piece prior to pulse elimination;
FIG. 4 is a schematic illustration of the surface of a lithium battery pole piece after the pulse is removed.
Description of reference numerals: 1. a pulse suppressor; 11. a closed container; 111. a piston; 112. an upper positioning ring; 113. a lower positioning ring; 114. extruding the strip; 12. a feed pipe; 13. a discharge pipe; 14. an air inlet pipe; 15. an air outlet pipe; 16. a pressure gauge; 17. an intake valve; 18. an air outlet valve; 19. a flow regulating valve; 2. a feed channel; 3. an air chamber; 4. a liquid chamber; 5. a flow meter; 6. a first pressure sensor; 7. a second pressure sensor; 8. a third pressure sensor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
a feed device for pulse elimination, as shown in fig. 1, comprises a control system (not shown in the drawing), two pulse suppressors 1 and a feed channel 2. The pulse suppressor 1 is automatically controlled by the control system to receive the slurry supplied by the peristaltic pump and to eliminate its pulse stream for further delivery into the feed channel 2.
As shown in fig. 1, the pulse suppressor 1 includes a cylindrical closed vessel 11, the upper end of the inner cavity of the closed vessel 11 is a gas chamber 3, the lower end is a liquid chamber 4, a piston 111 for completely separating the gas chamber 3 and the liquid chamber 4 is provided between the gas chamber 3 and the liquid chamber 4, and the piston 111 is in a disk shape and is attached to the inner wall of the closed vessel 11 so as to be slidable up and down.
One side of the lower end of the closed container 11 is fixedly connected with a feeding pipe 12 communicated with the liquid chamber 4, the bottom of the closed container is fixedly connected with a discharging pipe 13 communicated with the liquid chamber 4, the feeding pipe 12 is connected with a peristaltic pump, the discharging pipe 13 is connected with the feeding channel 2, and the discharging pipe 13 is connected with a flow regulating valve 19 and a flow meter 5. The slurry supplied by the peristaltic pump flows from the feed pipe 12 into the liquid chamber 4 and via the discharge pipe 13 into the feed channel 2.
The opposite two sides of the upper end of the closed container 11 are respectively connected with an air inlet pipe 14 and an air outlet pipe 15 which are communicated with the air chamber 3, the air inlet pipe 14 is connected with an air storage tank (not shown in the attached drawing) and the middle part is connected with an air inlet valve 17, and the air outlet pipe 15 is connected with an air outlet valve 18. The inner wall of the upper end of the air chamber 3 is fixedly provided with a first pressure sensor 6, and the top of the closed container 11 is connected with a pressure gauge 16. And the air inlet valve 17, the air outlet valve 18, the first pressure sensor 6, the flow regulating valve 19 and the flowmeter 5 are all electrically connected with the control system. The control system controls the air inlet valve 17 and the air outlet valve 18 to be opened and closed according to the air pressure signal of the first pressure sensor 6, so that the internal pressure of the air chamber 3 is constant, the flow rate of the slurry is controlled to be constant, the pulse flow is eliminated, and the surface of a coating product is uniformly coated. The two pulse suppressors 1 work alternately, so that uninterrupted feeding is ensured, and the efficiency is improved. The application range of the feeding device comprises but is not limited to lithium battery diaphragm production, lithium battery pole piece production and lithium battery pole piece surface treatment.
The using method comprises the following steps:
s1 pre-feeding: opening an air outlet valve 18, closing a flow regulating valve 19, enabling the slurry supplied by the peristaltic pump to enter a liquid chamber 4 through a feed pipe 12, and stopping feeding after the slurry reaches three quarters of the height of the closed container 11 according to preset time;
s2 pre-intake: closing the air outlet valve 18, opening the air inlet valve 17, and allowing the compressed air to enter the air chamber 3 through the air inlet pipe 14 until the pressure intensity of the air chamber 3 reaches a certain value;
s3 feeding: the flow regulating valve 19 is opened, and the control system controls the opening and closing of the air inlet valve 17 and the air outlet valve 18, so that the pressure of the air chamber 3 is constant, and the slurry flows out of the discharge pipe 13 at a constant speed and then flows into the feeding channel 2.
S4 Prep: the other pulse suppressor 1, which is not fed, performs the above-described S1 pre-feeding and S2 pre-air-charging, for standby;
s5 switching: according to the preset time, after the slurry of the pulse suppressor 1 which is being fed is lowered to the quarter height of the closed container 11, the S1 pre-feeding and the S2 pre-air charging are carried out, and the pulse suppressor 1 which finishes the S4 pre-preparation carries out the S3 feeding, so that the seamless switching is realized.
Example two:
as shown in fig. 2, the difference from the first embodiment is that the position of the piston 111 is changed from the predetermined time control to the pressure-sensitive control. An upper positioning ring 112 is fixedly connected to the inner wall of the air chamber 3, and a plurality of second pressure sensors 7 are fixedly connected to the lower side of the upper positioning ring 112. The inner wall of the liquid chamber 4 is fixedly connected with a lower positioning ring 113, the upper side of the lower positioning ring 113 is fixedly connected with a plurality of third pressure sensors 8, and the second pressure sensor 7 and the third pressure sensors 8 are electrically connected with a control system. The air inlet pipe 14 and the air outlet pipe 15 are both positioned at the upper part of the upper positioning ring 112; the feed pipe 12 and the discharge pipe 13 are both located below the lower locating ring 113. The upper positioning ring 112 is located at three quarters of the height of the closed vessel 11, and the lower positioning ring 113 is located at one quarter of the height of the closed vessel 11.
The upper positioning ring 112 and the lower positioning ring 113 are both arranged obliquely, the upper side and the lower side of the edge of the piston 111 are both fixedly connected with extrusion strips 114 attached to the inner wall of the closed container 11, the extrusion strips 114 are annular and have triangular sections, and the extrusion strips 114 can extend into the included angle between the upper positioning ring 112 or the lower positioning ring 113 and the inner wall of the closed container 11. The slurry flows into the liquid chamber 4 until the piston 111 abuts against the second pressure sensor 7, and feeding is stopped; when feeding, the piston 111 is lowered continuously until it abuts against the third pressure sensor 8, so that feeding is stopped and feeding is resumed.
The using method comprises the following steps:
a method of using a feed device for pulse cancellation, comprising the steps of:
s1 pre-feeding: opening the air outlet valve 18, closing the flow regulating valve 19, feeding the slurry supplied by the peristaltic pump into the liquid chamber 4 through the feeding pipe 12, and stopping feeding after the second pressure sensor 7 senses the pressure at the top of the extrusion strip 114;
s2 pre-intake: closing the air outlet valve 18, opening the air inlet valve 17, and allowing the compressed air to enter the air chamber 3 through the air inlet pipe 14 until the pressure intensity of the air chamber 3 reaches a certain value;
s3 feeding: the flow regulating valve 19 is opened, and the control system controls the opening and closing of the air inlet valve 17 and the air outlet valve 18, so that the pressure of the air chamber 3 is constant, and the slurry flows out of the discharge pipe 13 at a constant speed and then flows into the feeding channel 2.
S4 Prep: the other pulse suppressor 1, which is not fed, performs the above-described S1 pre-feeding and S2 pre-air-charging, for standby;
s5 switching: after the third pressure sensor 8 of the feeding pulse suppressor 1 senses the pressure of the falling extrusion strip 114, the pre-feeding of S1 and the pre-air intake of S2 are performed, and the feeding of S3 is performed by the pulse suppressor 1 which completes the pre-preparation of S4, so that seamless switching is realized.
And (3) effect testing:
taking the application of coating the lithium battery pole piece as an example, as shown in fig. 3 and 4, after the feeding device of the first embodiment and the second embodiment is used to eliminate the pulse to the slurry, the surface of the lithium battery pole piece becomes smooth and flat.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides an eliminate feedway of pulse, includes pulse suppressor (1) and feed channel (2), pulse suppressor (1) includes airtight container (11), inlet pipe (12) and discharging pipe (13), airtight container (11) inner chamber upper end is air chamber (3), lower extreme is liquid chamber (4), it has piston (111) that can slide from top to bottom to separate between air chamber (3) and liquid chamber (4), inlet pipe (12) and liquid chamber (4) intercommunication, discharging pipe (13) and liquid chamber (4) intercommunication and be connected its characterized in that with feed channel (2): pulse inhibitor (1) still includes intake pipe (14) and outlet duct (15), intake pipe (14) one end and air chamber (3) intercommunication, the other end are connected with the gas holder, the middle part is connected with admission valve (17), outlet duct (15) and air chamber (3) intercommunication just are connected with air outlet valve (18).
2. A feed device for pulse cancellation according to claim 1, characterised in that: still include control system and first pressure sensor (6), first pressure sensor (6) are installed in air chamber (3) inner wall, admission valve (17), air outlet valve (18) and first pressure sensor (6) all are connected with control system electricity.
3. A feed device for pulse cancellation according to claim 2, characterised in that: the discharge pipe (13) is connected with a flow regulating valve (19) and a flowmeter (5) which are electrically connected with a control system.
4. A feed device for pulse cancellation according to claim 2, characterised in that: the air chamber (3) inner wall is provided with holding ring (112), it is provided with second pressure sensor (7) to go up holding ring (112) downside, liquid chamber (4) inner wall is provided with down holding ring (113), holding ring (113) upside is provided with third pressure sensor (8) down, second pressure sensor (7) and third pressure sensor (8) all are connected with the control system electricity.
5. A feed device for pulse cancellation according to claim 4, characterised in that: the air inlet pipe (14) and the air outlet pipe (15) are both positioned at the upper part of the upper positioning ring (112); the feeding pipe (12) and the discharging pipe (13) are both positioned at the lower part of the lower positioning ring (113).
6. A feed device for pulse cancellation according to claim 4, characterised in that: the upper positioning ring (112) and the lower positioning ring (113) are both arranged in an inclined mode, and the upper side and the lower side of the edge of the piston (111) are both connected with extrusion strips (114).
7. A feed device for pulse cancellation according to claim 1, characterised in that: the top of the closed container (11) is connected with a pressure gauge (16).
8. A feed device for pulse cancellation according to claim 1, characterised in that: the pulse suppressors (1) are provided with at least two.
9. A method of using the de-pulsing feed device of claim 1, comprising the steps of:
s1 pre-feeding: opening an air outlet valve (18), closing a flow regulating valve (19), enabling the slurry supplied by the peristaltic pump to enter a liquid chamber (4) through a feed pipe (12), and stopping feeding after the slurry reaches a certain height;
s2 pre-intake: closing the air outlet valve (18), opening the air inlet valve (17), and allowing compressed air to enter the air chamber (3) through the air inlet pipe (14) until the pressure of the air chamber (3) reaches a certain value;
s3 feeding: and opening the flow regulating valve (19), and simultaneously controlling the opening and closing of the air inlet valve (17) and the air outlet valve (18) by the control system to ensure that the pressure of the air chamber (3) is constant, and the slurry flows out from the discharge pipe (13) at a constant speed and then flows into the feeding channel (2).
10. Use of a feed device for pulse cancellation according to claim 9, characterised in that: also comprises the following steps:
s4 Prep: the other pulse suppressor (1) which is not supplied carries out the S1 pre-feeding and the S2 pre-air-charging for standby;
s5 switching: after the slurry of the pulse suppressor (1) which is being fed falls to a certain height, the S1 pre-feeding and the S2 pre-air-inlet are carried out, and the pulse suppressor (1) which finishes the S4 pre-preparation carries out S3 feeding, so that seamless switching is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010683163.XA CN111804531A (en) | 2020-07-15 | 2020-07-15 | Feeding device capable of eliminating pulses and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010683163.XA CN111804531A (en) | 2020-07-15 | 2020-07-15 | Feeding device capable of eliminating pulses and using method thereof |
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| CN111804531A true CN111804531A (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010683163.XA Pending CN111804531A (en) | 2020-07-15 | 2020-07-15 | Feeding device capable of eliminating pulses and using method thereof |
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| CN (1) | CN111804531A (en) |
Cited By (2)
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| CN116145500A (en) * | 2023-03-31 | 2023-05-23 | 徐州徐工养护机械有限公司 | Compensation system for rapidly balancing negative pressure |
| CN116946739A (en) * | 2023-07-05 | 2023-10-27 | 青岛黑猫新材料研究院有限公司 | Be applied to latex conveyor of wet process masterbatch production |
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|---|---|---|---|---|
| CN116145500A (en) * | 2023-03-31 | 2023-05-23 | 徐州徐工养护机械有限公司 | Compensation system for rapidly balancing negative pressure |
| CN116946739A (en) * | 2023-07-05 | 2023-10-27 | 青岛黑猫新材料研究院有限公司 | Be applied to latex conveyor of wet process masterbatch production |
| CN116946739B (en) * | 2023-07-05 | 2024-01-19 | 青岛黑猫新材料研究院有限公司 | Be applied to latex conveyor of wet process masterbatch production |
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Application publication date: 20201023 |
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| RJ01 | Rejection of invention patent application after publication |