CN219701169U

CN219701169U - Defoaming equipment

Info

Publication number: CN219701169U
Application number: CN202320739722.3U
Authority: CN
Inventors: 李忠华; 张珂; 周中心
Original assignee: Lanjun New Energy Technology Co ltd
Current assignee: Lanjun New Energy Technology Co ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-09-19
Anticipated expiration: 2033-03-31

Abstract

The utility model belongs to the technical field of lithium battery production, and discloses defoaming equipment. The defoaming equipment comprises a vacuum barrel, a feeding device and a discharging device, wherein the feeding device and the discharging device are both communicated with a vacuum chamber, the feeding device comprises a first relay chamber, the two ends of the first relay chamber are provided with a first inlet and a first outlet, the first inlet is connected with the outside, the first outlet is connected with the vacuum chamber, the discharging device comprises a second relay chamber, the two ends of the second relay chamber are provided with a second inlet and a second outlet, the second inlet is connected with the vacuum chamber, the second outlet is connected with the outside, at least one of the first inlet and the first outlet is in a closed state in the feeding process, at least one of the second inlet and the second outlet is in a closed state in the discharging process, in actual use, the feeding action and the discharging action are synchronously performed, so that the volume of slurry in the vacuum barrel can reach dynamic balance, the vacuum degree in the vacuum barrel can be ensured, a good defoaming effect can be ensured, and the vacuum degree in the vacuum barrel can be effectively prevented from being damaged.

Description

Defoaming equipment

Technical Field

The utility model relates to the technical field of lithium battery production, in particular to defoaming equipment.

Background

In the manufacturing process of the lithium ion battery, the stirring of the anode slurry and the cathode slurry is to mix powder, solvent and solution so as to achieve a relatively stable suspension state. Because the powder is provided with gas in the process of stirring, and the stirring process is provided with strong shearing and turning, the gas is easily brought into the slurry in the process, particularly the slurry of the cathode, the main materials are graphite and water, the two materials are difficult to infiltrate each other, the gas (bubbles) is more easily entrained in the slurry after the stirring is finished, in the coating process, the bubbles are entrained in the slurry and coated on the surface of a substrate, the bubbles burst after being dried, annular concave pits are generated on the surface of a pole piece, and the defects, particularly if appearing at the cathode, can cause serious safety problems of a lithium battery.

In the prior art, some mixers are used for solving the problem of bubbles by vacuumizing in the slurry stirring process, but the mixers have large capacity and limited vacuumizing effect; some foam removers with centrifugal discs are used for defoaming mixed slurry to a certain extent, but the foam removal effect is poor because of the difficulty in realizing the function of high vacuum.

Accordingly, there is a need for a defoaming apparatus to solve the above problems.

Disclosure of Invention

The utility model aims to provide a defoaming device which has a good defoaming effect and can ensure the usability and safety of a lithium battery.

To achieve the purpose, the utility model adopts the following technical scheme:

defoaming apparatus, said defoaming apparatus comprising:

a vacuum tub having a vacuum chamber;

the feeding device is connected with the vacuum chamber, the feeding device feeds unit volume of slurry into the vacuum chamber through feeding action, the feeding device comprises a first relay chamber, the first relay chamber is provided with a first inlet connected with the outside and a first outlet connected with the vacuum chamber, and in the feeding process, at least one of the first inlet and the first outlet is in a closed state;

the discharging device is connected with the vacuum chamber, and discharges the slurry in unit volume from the vacuum chamber through discharging action, and comprises a second relay chamber, wherein the second relay chamber is provided with a second inlet connected with the vacuum chamber and a second outlet connected with the outside, and in the discharging process, at least one of the second inlet and the second outlet is in a closed state;

wherein, in the unit time period, the times of the feeding actions are the same as the times of the discharging actions.

As an optional technical scheme, the feeding device further comprises a first piston and a first driving piece, wherein the first piston is slidably arranged in the first relay chamber, the first driving piece is in transmission connection with the first piston, the first driving piece can drive the first piston to slide along the first relay chamber so as to enable the volume of the first relay chamber to change, when the volume of the first relay chamber is increased, slurry enters the first relay chamber through the first inlet, and when the volume of the first relay chamber is reduced, slurry enters the vacuum chamber through the first outlet;

the discharging device further comprises a second piston and a second driving piece, the second piston is arranged in the second relay chamber in a sliding mode, the second driving piece is in transmission connection with the second piston, the second driving piece can drive the second piston to slide along the second relay chamber so as to enable the volume of the second relay chamber to change, when the volume of the second relay chamber is increased, slurry enters the second relay chamber through the second inlet, and when the volume of the second relay chamber is reduced, the slurry is discharged through the second outlet;

wherein the volume change state of the first relay chamber is opposite to the volume change state of the second relay chamber.

As an alternative technical scheme, the first driving piece is a first crankshaft, the first crankshaft is provided with a first journal, the first journal is rotatably provided with a first connecting rod, the first connecting rod is connected with the first piston, and the first crankshaft is used for driving the first piston to reciprocate along the first relay chamber;

the second driving piece is a second crankshaft, the second crankshaft is provided with a second journal, a second connecting rod is rotatably arranged on the second journal, the second connecting rod is connected with the second piston, and the second crankshaft is used for driving the second piston to reciprocate along the second relay chamber.

As an optional technical scheme, the first crankshaft and the second crankshaft are integrally arranged to form a main crankshaft, the first shaft neck and the second shaft neck are respectively positioned at two ends of the main crankshaft, and the arrangement angles of the first shaft neck and the second shaft neck are different by 180 degrees.

As an optional technical scheme, the first inlet is a first one-way valve, the first outlet is a second one-way valve, the second inlet is a third one-way valve, and the second outlet is a fourth one-way valve.

As an optional technical scheme, the first check valve is a first electric ball valve, the second check valve is a second electric ball valve, a switching assembly is arranged on the main crankshaft and used for switching the opening and closing states of the first electric ball valve and the second electric ball valve.

As an optional technical scheme, the switching component includes correlation inductor and shielding piece, correlation inductor includes transmitter and receiver, shielding piece set up in main bent axle, and be located between the transmitter with the receiver, shielding piece is provided with the arch, protruding with can shelter from the light that the transmitter sent for first electric ball valve with the switching of the open-close state of second electric ball valve.

As an optional technical scheme, the defoaming device further comprises a centrifugal disc and a main shaft, wherein the centrifugal disc is rotatably arranged inside the vacuum chamber through the main shaft.

As an alternative solution, the main shaft is in driving connection with the main crankshaft.

As an optional technical scheme, the bottom of the vacuum barrel is funnel-shaped.

The utility model has the beneficial effects that:

the utility model discloses defoaming equipment, which comprises a vacuum barrel, a feeding device and a discharging device, wherein the feeding device and the discharging device are communicated with a vacuum chamber, the feeding device comprises a first relay chamber with a first inlet and a first outlet at two ends, the first inlet is connected with the outside, the first outlet is connected with the vacuum chamber, the discharging device comprises a second relay chamber with a second inlet and a second outlet at two ends, the second inlet is connected with the vacuum chamber, the second outlet is connected with the outside, at least one of the first inlet and the first outlet is in a closed state in the feeding process, and at least one of the second inlet and the second outlet is in a closed state in the discharging process. In actual use, the feeding action and the discharging action are synchronous, so that the volume of slurry in the vacuum barrel can reach dynamic balance, the vacuum degree in the vacuum barrel is further ensured, the defoaming effect is ensured, at least one of the first inlet and the first outlet is in a closed state in the feeding process, the external gas can not enter the vacuum barrel through the feeding pipeline to influence the vacuum degree, the defoaming effect is further reduced, at least one of the second inlet and the second outlet is in a closed state in the discharging process, the stability of the vacuum degree in the vacuum barrel is further improved, the defoaming effect of the defoaming equipment is improved, and the defoaming effect can be ensured, and continuous discharging can be ensured.

Drawings

FIG. 1 is a schematic diagram of the structure of a defoaming apparatus according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1A;

fig. 3 is a schematic view of the structure of a shield according to an embodiment of the present utility model.

In the figure:

10. a vacuum barrel; 11. a vacuum chamber; 12. a vacuum port; 13. an exhaust port;

21. a centrifugal disc; 22. a main shaft;

31. a feed line; 32. a first electrically operated ball valve; 33. a second electric ball valve; 34. a first plunger pump;

41. a discharge pipeline; 42. a third one-way valve; 43. a fourth one-way valve; 44. a second plunger pump;

50. a main crankshaft; 51. a first journal; 511. a first link; 52. a second journal; 521. a second link; 53. a switching assembly; 531. a transmitter; 532. a receiver; 533. a shield; 5331. sharp corners.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1, the present embodiment provides a defoaming apparatus including a vacuum tank 10, a separate feeding device and a discharge device, the vacuum tank 10 having a vacuum chamber 11; the feeding device feeds a unit volume of slurry into the vacuum chamber 11 through feeding action, and comprises a first relay chamber, wherein the first relay chamber is provided with a first inlet connected with the outside and a first outlet connected with the vacuum chamber 11, and in the feeding process, at least one of the first inlet and the first outlet is in a closed state; the discharging device is connected with the vacuum chamber 11, the discharging device discharges the slurry in unit volume from the vacuum chamber 11 through discharging action, the discharging device comprises a second relay chamber, the second relay chamber is provided with a second inlet connected with the vacuum chamber 11 and a second outlet connected with the outside, and in the discharging process, at least one of the second inlet and the second outlet is in a closed state; wherein, in the unit time period, the times of feeding actions are the same as the times of discharging actions. Specifically, in this embodiment, in the unit time period, the number of times of feeding actions is the same as the number of times of discharging actions, so that the volume of slurry in the vacuum barrel 10 can reach dynamic balance, and then the vacuum degree in the vacuum barrel 10 is ensured, the defoaming effect is ensured, and in the feeding process, at least one of the first inlet and the first outlet is in a closed state, the influence of the external air on the vacuum degree in the vacuum barrel 10 can be avoided, and then the defoaming effect is reduced, and in the discharging process, at least one of the second inlet and the second outlet is in a closed state, the stability of the vacuum degree in the vacuum barrel 10 is further improved, the defoaming effect of the defoaming equipment is improved, and the defoaming equipment can ensure the defoaming effect and can also ensure continuous discharging. Optionally, in this embodiment, the feeding action and the discharging action are performed synchronously, so that the volume of the slurry in the vacuum chamber 11 is always kept consistent, and the defoaming effect is ensured.

Optionally, in this embodiment, the feeding device further includes a feeding pipeline 31, the feeding pipeline penetrates through a top wall of the vacuum barrel 10, the first relay chamber is disposed on the feeding pipeline 31, the discharging device further includes a discharging pipeline 41, the discharging pipeline 41 penetrates through a bottom wall of the vacuum barrel 10, and the second relay chamber is disposed on the discharging pipeline 41.

Further, the feeding device further comprises a first piston and a first driving piece, the first piston is arranged in the first relay chamber in a sliding mode, the first driving piece is in transmission connection with the first piston, the first driving piece can drive the first piston to slide along the first relay chamber so as to enable the volume of the first relay chamber to change, when the volume of the first relay chamber is increased, slurry enters the first relay chamber through the first inlet, and when the volume of the first relay chamber is reduced, the slurry enters the vacuum chamber 11 through the first outlet; the discharging device further comprises a second piston and a second driving piece, the second piston is arranged in the second relay chamber in a sliding mode, the second driving piece is in transmission connection with the second piston, the second driving piece can drive the second piston to slide along the second relay chamber so as to enable the volume of the second relay chamber to change, when the volume of the second relay chamber is increased, slurry enters the second relay chamber through the second inlet, and when the volume of the second relay chamber is reduced, the slurry is discharged through the second outlet; wherein the volume change state of the first relay chamber is opposite to the volume change state of the second relay chamber. Specifically, in this embodiment, the feeding process includes a first feeding process and a second feeding process, where the first feeding process is a process in which external slurry enters the first relay chamber, at this time, the first inlet is opened, the first outlet is closed, the volume of the first relay chamber is gradually increased, the slurry enters the first relay chamber through the first inlet, the second feeding process is a process in which the slurry of the first relay chamber enters the vacuum chamber 11, at this time, the second inlet is opened, the first inlet is closed, the volume of the first relay chamber is gradually decreased, and the slurry in the first relay chamber enters the vacuum chamber 11 through the first outlet; the discharging process comprises a first discharging process and a second discharging process, wherein the first discharging process is a process that slurry in the vacuum chamber 11 enters the second relay chamber, at the moment, the second inlet is opened, the second outlet is closed, the volume of the second relay chamber is gradually increased, the defoamed slurry enters the second relay chamber through the second inlet, the second discharging process is a process that the slurry in the second relay chamber is discharged outside, during the period, the second inlet is closed, the second outlet is opened, the volume of the second relay chamber is gradually reduced, and the slurry in the second relay chamber flows out through the second outlet to finish discharging; in this embodiment, the volume change state of the first relay chamber is opposite to the volume change state of the second relay chamber, that is, when the slurry which is not defoamed enters the vacuum chamber 11 through the first outlet, the slurry which is defoamed enters the second relay chamber through the second inlet at the same time, so that the volume of the slurry in the vacuum barrel 10 is ensured to be invariable all the time, the vacuum degree in the vacuum barrel 10 can be ensured not to be influenced, and the defoaming effect of the defoaming device is ensured. Specifically, in this embodiment, the first relay chamber and the second relay chamber have the same volume.

Further, the first driving member is a first crankshaft, the first crankshaft is provided with a first journal 51, the first journal 51 is rotatably provided with a first connecting rod 511, the first connecting rod 511 is connected with a first piston, and the first crankshaft is used for driving the first piston to reciprocate along the first relay chamber; the second driving member is a second crankshaft, the second crankshaft has a second journal 52, the second journal 52 is rotatably provided with a second connecting rod 521, the second connecting rod 521 is connected with a second piston, and the second crankshaft is used for driving the second piston to reciprocate along the second relay chamber. Specifically, in this embodiment, a first journal 51 is disposed on a first crankshaft, a first connecting rod 511 is rotatably disposed on the first journal 51, the first connecting rod 511 is connected with a first piston, and when the first crankshaft rotates, the first connecting rod 511 can drive the first piston to reciprocate along a first relay chamber, so that the volume of the first relay chamber changes, and the slurry is pumped and discharged; the second crankshaft is provided with a second journal 52, the second connecting rod 521 is rotatably arranged on the second journal 52, the second connecting rod 521 is connected with the second piston, and when the second crankshaft rotates, the second connecting rod 521 can drive the second piston to reciprocate along the second relay chamber, so that the volume of the second relay chamber changes, and further, the suction and discharge of the defoamed slurry are realized. Specifically, in this embodiment, the rotation angle of the first crankshaft and the second crankshaft is 180 ° different, so that the feeding and discharging of the slurry can be ensured to be synchronous, the dimensions of the first crankshaft and the second crankshaft are the same, and the feeding volume and the discharging volume can be ensured to be the same. Optionally, the first relay chamber and the first piston in the embodiment are the first plunger pump 34, the second relay chamber and the second piston are the second plunger pump 34, and the plunger pump has advantages of high rated pressure, compact structure, high efficiency, convenient flow adjustment and the like, and can ensure defoaming efficiency and defoaming effect.

Further, the first crankshaft and the second crankshaft are integrally arranged to form a main crankshaft 50, the first journal 51 and the second journal 52 are respectively positioned at two ends of the main crankshaft 50, and the arrangement angles of the first journal 51 and the second journal 52 are 180 degrees different. Specifically, in this embodiment, the first crankshaft and the second crankshaft are integrally arranged to form the main crankshaft 50, the first journal 51 and the second journal 52 are respectively located at two ends of the main crankshaft 50, and the setting angles of the first journal 51 and the second journal 52 are different by 180 °, so that the running frequencies of the first piston and the second piston can be ensured to be the same, the volume of the slurry entering the vacuum barrel 10 and the volume of the slurry discharged are further ensured to be consistent, the vacuum degree in the vacuum barrel 10 is ensured, and the defoaming effect is ensured.

Further, the first inlet is a first one-way valve, the first outlet is a second one-way valve, the second inlet is a third one-way valve 42, and the second outlet is a fourth one-way valve 43. Specifically, in this embodiment, the first check valve and the second check valve are disposed along the feeding direction, when the volume of the first relay chamber gradually increases, the air pressure in the first relay chamber gradually decreases, the first check valve is opened, the second check valve is closed, external slurry enters the first relay chamber through the first check valve, when the volume of the first relay chamber gradually decreases, the air pressure in the first relay chamber gradually increases, the first check valve is closed, the second check valve is opened, and the slurry in the first relay chamber enters the vacuum chamber 11 through the second check valve; the third check valve 42 and the fourth check valve 43 are arranged along the discharging direction, when the volume of the second relay chamber gradually increases, the air pressure in the second relay chamber gradually decreases, the third check valve 42 is opened, the fourth check valve 43 is closed, the slurry in the vacuum chamber 11 enters the second relay chamber through the third check valve 42, when the volume of the second relay chamber gradually decreases, the air pressure in the second relay chamber gradually increases, the third check valve 42 is closed, the fourth check valve 43 is opened, and the slurry in the second relay chamber is discharged through the fourth check valve 43. The one-way valve is adopted in the embodiment, so that the purpose that only one side valve can allow slurry to pass through in the pumping and discharging process is achieved, and the phenomenon of air leakage is avoided.

Further, the first check valve is a first electric ball valve 32, the second check valve is a second electric ball valve 33, a switching component 53 is arranged on the main crankshaft 50, and the switching component 53 is used for switching the open and closed states of the first electric ball valve 32 and the second electric ball valve 33. Specifically, in this embodiment, since the feeding pipeline 31 has a feeding requirement, and the vacuum barrel 10 is in a negative pressure environment, the first electric ball valve 32 and the second electric ball valve 33 are adopted more tightly, so that external slurry or gas can be prevented from entering the vacuum barrel 10 to damage the vacuum environment in the vacuum barrel 10, and the defoaming effect is ensured. The main crankshaft 50 is provided with a switching unit 53 for switching the on/off states of the first and second electrically operated ball valves 32 and 33.

Further, as shown in fig. 2 and 3, the switching component 53 includes an opposite-reflection sensor and a shielding member 533, the opposite-reflection sensor includes an emitter 531 and a receiver 532, the shielding member 533 is disposed on the main crankshaft 50 and between the emitter 531 and the receiver 532, and the shielding member 533 is provided with a protrusion capable of shielding the light emitted from the emitter 531, so that the states of the first electrically-operated ball valve 32 and the second electrically-operated ball valve 33 are switched. Specifically, in the present embodiment, the shielding member 533 has the sharp corner 5331 and is capable of rotating synchronously with the main crankshaft 50, the emitter 531 and the receiver 532 of the opposite-flow sensor are fixedly disposed on an external structure, such as a bracket, etc., the shielding member 533 is disposed between the emitter 531 and the receiver 532, and when the sharp corner 5331 rotates between the emitter 531 and the receiver 532, the light emitted by the emitter 531 is shielded by the sharp corner 5331, and the switching of the open and closed states of the first electric ball valve 32 and the second electric ball valve 33 is completed. Specifically, in this embodiment, the sharp corner 5331 of the shroud 533 is pointed 180 ° from the first journal 51. Specifically, in this embodiment, the first electric ball valve 32 and the second electric ball valve 33 are driven by a driving structure, the driving structure is connected to a controller, the controller is electrically connected to a correlation sensor, and the controller in this embodiment is a relay.

Further, the defoaming apparatus further includes a centrifugal disk 21 and a main shaft 22, and the centrifugal disk 21 is rotatably provided inside the vacuum chamber 11 by the main shaft 22. Specifically, in the present embodiment, the spindle 22 is rotatably disposed at the center of the centrifugal disk 21, and the end of the feed pipe 31 is located above the centrifugal disk 21 and near the center of the centrifugal disk 21, so that the distance of the slurry moving radially along the centrifugal disk 21 is large, ensuring the defoaming effect. The slurry falls onto the centrifugal disk 21 through the feeding pipeline 31, when the centrifugal disk 21 rotates, the slurry is thrown to the edge of the centrifugal disk 21 under the action of centrifugal force and forms a film on the centrifugal disk 21, because the film is very thin, bubbles cannot be maintained, and the vacuum piece enables a certain vacuum degree in the vacuum barrel 10, so that the defoaming effect is further ensured, the slurry can be thrown to the inner wall of the vacuum barrel 10, flows downwards to the barrel bottom of the vacuum barrel 10 along the inner wall of the vacuum barrel 10, and flows out through the discharging pipeline 41. And the outlet of the feed line should be as small as possible from the centrifugal disk, so that more bubbles are avoided when dripping onto the centrifugal disk 21 via the feed line 31.

Further, the main shaft 22 is in driving connection with the main crankshaft 50. Specifically, in this embodiment, the main shaft 22 is in transmission connection with the main crankshaft 50 through a belt pulley or a gear box, when the main shaft 22 rotates, the main crankshaft 50 rotates along with the main shaft, and this arrangement can make the main shaft 22 and the main crankshaft 50 rotate synchronously, ensure that the centrifugal disc 21 and the feeding and discharging materials are synchronously performed in the defoaming process, avoid generating the idle running of the defoaming device, avoid generating waste, and the arrangement can complete the driving only by one driving piece, also can reduce the use of the driving piece, and simplify the structure.

Further, the bottom of the vacuum tub 10 is funnel-shaped. In particular, in the present embodiment, such an arrangement can facilitate the accumulation of the defoamed slurry to the bottom of the vacuum tub 10, facilitating the outflow of the slurry.

Optionally, in this embodiment, the vacuum barrel 10 has a vacuum port 12 and an air outlet 13, the vacuum port 12 is used for connecting an external vacuum component, the vacuum component in this embodiment may be a common vacuum pumping device, which is not described herein, and the air outlet 13 is used for facilitating external air to enter the vacuum chamber 11 after the defoaming device stops running.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. Defoaming equipment, its characterized in that, defoaming equipment includes:

-a vacuum tub (10), the vacuum tub (10) having a vacuum chamber (11);

the feeding device is connected with the vacuum chamber (11), the feeding device feeds slurry in unit volume into the vacuum chamber (11) through feeding action, the feeding device comprises a first relay chamber, the first relay chamber is provided with a first inlet connected with the outside and a first outlet connected with the vacuum chamber (11), and in the feeding process, at least one of the first inlet and the first outlet is in a closed state;

the discharging device is connected with the vacuum chamber (11), discharges the slurry in unit volume from the vacuum chamber (11) through discharging action, and comprises a second relay chamber, wherein the second relay chamber is provided with a second inlet connected with the vacuum chamber (11) and a second outlet connected with the outside, and at least one of the second inlet and the second outlet is in a closed state in the discharging process;

2. The defoaming device according to claim 1, characterized in that the feeding means further comprise a first piston and a first driving member, the first piston being slidably arranged in the first relay chamber, the first driving member being in driving connection with the first piston, the first driving member being capable of driving the first piston to slide along the first relay chamber so as to change the volume of the first relay chamber, the slurry entering the first relay chamber via the first inlet when the volume of the first relay chamber increases, and the slurry entering the vacuum chamber (11) via the first outlet when the volume of the first relay chamber decreases;

3. The defoaming device according to claim 2, characterized in that said first driving element is a first crankshaft having a first journal (51), said first journal (51) being provided with a first connecting rod (511) in rotation, said first connecting rod (511) being connected to said first piston, said first crankshaft being intended to drive the reciprocating movement of said first piston along said first relay chamber;

the second driving piece is a second crankshaft, the second crankshaft is provided with a second journal (52), the second journal (52) is rotatably provided with a second connecting rod (521), the second connecting rod (521) is connected with the second piston, and the second crankshaft is used for driving the second piston to reciprocate along the second relay chamber.

4. A defoaming device according to claim 3, characterized in that the first crankshaft is arranged integrally with the second crankshaft forming a main crankshaft (50), the first journal (51) and the second journal (52) are located at both ends of the main crankshaft (50), respectively, and the first journal (51) and the second journal (52) are arranged at 180 ° different angles.

5. The defoaming apparatus according to claim 4, wherein the first inlet is a first one-way valve, the first outlet is a second one-way valve, the second inlet is a third one-way valve (42), and the second outlet is a fourth one-way valve (43).

6. The defoaming device according to claim 5, characterized in that the first one-way valve is a first electrically-operated ball valve (32), the second one-way valve is a second electrically-operated ball valve (33), a switching assembly (53) is arranged on the main crankshaft (50), and the switching assembly (53) is used for switching the open and closed states of the first electrically-operated ball valve (32) and the second electrically-operated ball valve (33).

7. The defoaming device according to claim 6, characterized in that said switching assembly (53) comprises a correlation sensor comprising a transmitter (531) and a receiver (532) and a shutter (533) arranged between said main crankshaft (50) and said receiver (532), said shutter (533) being provided with a protrusion capable of blocking the light emitted by said transmitter (531) so that the open and closed states of said first electric ball valve (32) and said second electric ball valve (33) are switched.

8. The de-foaming apparatus according to claim 4, further comprising a centrifugal disc (21) and a spindle (22), the centrifugal disc (21) being rotatably arranged inside the vacuum chamber (11) by means of the spindle (22).

9. The defoaming device according to claim 8, characterized in that said main shaft (22) is in driving connection with said main crankshaft (50).

10. The defoaming device according to any one of claims 1 to 9, characterized in that the bottom of the vacuum tank (10) is funnel-shaped.