CN220194061U - Defoaming equipment - Google Patents

Abstract

The utility model belongs to the technical field of defoaming, and discloses defoaming equipment. The defoaming equipment comprises a pull cylinder, a sealing device and a vacuumizing piece, wherein the pull cylinder comprises a pull cylinder body and a flange part, the pull cylinder body forms a containing space, the flange part is formed by extending the upper edge of the pull cylinder body outwards, and the sealing device comprises a driving piece and a sealing mechanism; the sealing mechanism comprises a sealing cover and a sealing assembly, the sealing cover is connected with the output end of the driving piece, the sealing assembly comprises a plurality of sealing rings which are concentrically arranged, and the sealing rings are all arranged on the lower side of the sealing cover; the driving piece can drive the sealing cover to move along the vertical direction so that the sealing cover is covered on the pull cylinder, and at least one sealing ring is abutted against the flange part; the sealing cover is provided with a vacuumizing opening, and when the sealing cover and the pulling cylinder are in a buckling state, the vacuumizing piece is communicated with the accommodating space through the vacuumizing opening. Can adapt to the drawing cylinders with different diameter sizes, and the sealing cover is convenient to open and put down, and the alignment with the drawing cylinders is quick.

Description

Defoaming equipment

Technical Field

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

Background

In the process of manufacturing the glue for coating, the main glue and the auxiliary agents are firstly poured into a drawing cylinder, and the preparation is completed by high-speed stirring by using a stirrer, so that a large number of bubbles are formed in the glue; the direct coating of the adhesive surface has bubbles, which cause defects such as bubbles on the adhesive surface, light-transmitting points and the like; for high viscosity of the glue, the natural defoaming is very slow when the glue is stood; so that bubbles can be rapidly discharged through the vacuuming operation of the defoaming device.

Firstly, the glue is prepared by using a stirrer, and after the preparation is finished, the glue is pulled to a vacuumizing defoaming machine for vacuumizing and defoaming.

The conventional defoaming apparatus has the following problems:

1. the sealing cover for covering the drawing cylinders in the defoaming equipment is fixed in size, different sizes of drawing cylinders are required to be selected for preparing different glue amounts, and one defoaming equipment cannot simultaneously meet the requirements of drawing cylinders of various sizes;

2. when the sealing cover of the defoaming device is opened, the sealing cover is required to be lifted by an additional lifting device, and when the sealing cover is lifted and put down, the matching speed is also often influenced because of poor instability alignment of the lifting device.

Disclosure of Invention

The utility model aims to provide defoaming equipment which can be adapted to drawing cylinders with different diameter sizes, is convenient to open and put down a sealing cover, and is fast in alignment with the drawing cylinders.

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

defoaming equipment, including drawing jar, sealing device and evacuation spare, above-mentioned drawing jar is including drawing jar body and flange portion, and above-mentioned drawing jar body forms the accommodation space, and above-mentioned flange portion is outwards extended by the upper edge of above-mentioned drawing jar body and is formed, and above-mentioned sealing device includes:

the driving piece can output motion along the vertical direction;

the sealing mechanism comprises a sealing cover and a sealing assembly, the sealing cover is connected with the output end of the driving piece, the sealing assembly comprises a plurality of sealing rings which are concentrically arranged, and the sealing rings are all arranged on the lower side of the sealing cover; the driving piece can drive the sealing cover to move along the vertical direction so that the sealing cover is covered on the pulling cylinder, and at least one sealing ring is abutted against the flange part;

and when the sealing cover and the pulling cylinder are in a buckling state, the vacuumizing piece is communicated with the accommodating space through the vacuumizing opening.

Optionally, the sealing mechanism further includes a stirring assembly, where the stirring assembly includes:

the support piece is arranged at the output end of the driving piece;

a stirring driving member mounted on the supporting member;

and the stirring piece is in transmission connection with the output end of the stirring driving piece and pivoted with the sealing cover, and the stirring driving piece can drive the stirring piece to rotate so as to stir materials.

Optionally, the stirring piece includes:

one end of the extension rod is in transmission connection with the output end of the stirring driving piece and pivoted with the sealing cover;

and the stirring paddle is arranged at the other end of the extension rod and is used for stirring the materials.

Optionally, the above stirring assembly further comprises:

the limiting piece is connected with the supporting piece, and the driving piece can drive the limiting piece to move along the vertical direction;

the limit switch is in communication connection with the driving piece, and the limit piece can trigger the limit switch at a preset position so as to stop driving of the driving piece.

Optionally, the defoaming device further includes a liquid storage member, the liquid storage member is provided with an air inlet, an air outlet and a liquid flowing port, the gas mixed with the volatile solvent enters the liquid storage member from the air inlet, the volatile solvent is liquefied in the liquid storage member, the gas is discharged from the air outlet and enters the vacuumizing member, and the liquid flowing port is provided with a first valve.

Optionally, the defoaming device further includes a pull cylinder limiting assembly, where the pull cylinder limiting assembly includes:

at least two guide members arranged at intervals along a first direction, wherein the guide members extend along a second direction, and the first direction is perpendicular to the second direction;

and the limiting blocks are arranged at the same end of each guide piece, and the bottoms of the pulling cylinders are respectively in sliding fit with at least two guide pieces and can be limited on the limiting blocks so that the pulling cylinders are positioned under the sealing cover plates.

Optionally, the guide piece is a guide groove, the pull cylinder further comprises a base and universal wheels, the pull cylinder body is mounted on the base, the universal wheels are mounted below four corners of at least the base respectively, the universal wheels are in sliding fit with the corresponding guide groove, and the universal wheels and/or the side edges of the base can be in butt joint with the limiting blocks.

Optionally, a second valve is arranged on a pipeline connected with the vacuumizing port;

and/or the sealing cover is also provided with a pressure stabilizing tube, and the pressure stabilizing tube is provided with a pressure stabilizing valve.

Optionally, a pressure gauge is arranged on the sealing cover.

Optionally, the sealing cover is further provided with a visible window, the visible window is pivoted with a cleaning member, the cleaning member is attached to the inner surface of the visible window, and the cleaning member can be rotated to wipe the visible window.

The utility model has the beneficial effects that:

the utility model provides defoaming equipment, which is characterized in that a plurality of concentric sealing rings are arranged on the lower side of a sealing cover, a flange part is arranged on a drawing cylinder, when the diameters of a drawing cylinder body and the flange part are changed, the sealing rings with corresponding diameters are matched with the sealing rings, namely, at least one sealing ring is arranged on the flange part on flanges with different diameters, so that the effect that one sealing cover is matched with a drawing cylinder with various diameters is achieved; furthermore, this defoaming equipment passes through the setting of driving piece for sealed lid can be under the drive of driving piece along vertical direction motion, on the one hand, need not to install the hoist and mount piece temporarily when needs uncap, on the other hand, the moving trajectory of driving piece is along vertical direction, can guarantee sealed accurate opening part that falls to the drawing cylinder, realizes through the driving piece in the lock between drawing cylinder and the sealed lid, has saved the setting of the part of fixed drawing cylinder and sealed lid equally, and the operation is accurate and simple, quick.

Drawings

Fig. 1 is a schematic structural diagram of a defoaming device according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a partial structure of a defoaming device according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a pull cylinder limiting assembly according to an embodiment of the present utility model.

In the figure:

10. pulling a cylinder; 11. a pulling cylinder body; 12. a flange portion; 13. a base; 14. a universal wheel;

20. a sealing device; 21. a driving member;

22. a sealing mechanism; 221. sealing cover; 2211. a vacuum pumping port; 222. a seal assembly; 2221. a seal ring;

223. a stirring assembly; 2231. a limit switch; 2232. a stirring driving member; 2233. a stirring member; 22331. an extension rod; 22332. stirring paddles; 2234. a conveyor belt; 2235. a limiting piece; 22351. a main body portion; 22352. a trigger part;

224. a pressure stabilizing valve; 225. a pressure gauge; 226. a visual window; 227. a cleaning member; 228. a voltage stabilizing tube;

23. a second valve;

30. a vacuum pumping member;

40. a liquid storage member; 41. an air inlet; 42. an air outlet; 43. a liquid outlet; 44. a first valve;

50. a pull cylinder limiting assembly; 51. a guide member; 52. a limiting block; 60. an air inlet pipe; 70. and an air outlet pipe.

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", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, 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.

The present embodiment provides a defoaming apparatus capable of adapting to pull cylinders 10 of different diameter sizes, and the sealing cap 221 is convenient to open and put down, and is fast in alignment with the pull cylinders 10. As shown in fig. 1 and 2, the defoaming apparatus includes a pull cylinder 10, a sealing device 20 and a vacuum pumping member 30, the pull cylinder 10 includes a pull cylinder body 11 and a flange portion 12, the pull cylinder body 11 forms a receiving space, the flange portion 12 is formed by extending outward an upper edge of the pull cylinder body 11, the sealing device 20 includes a driving member 21 and a sealing mechanism 22, and the driving member 21 can output movement in a vertical direction; the sealing mechanism 22 comprises a sealing cover 221 and a sealing assembly 222, the sealing cover 221 is connected with the output end of the driving piece 21, the sealing assembly 222 comprises a plurality of sealing rings 2221 which are concentrically arranged, and the sealing rings 2221 are all arranged on the lower side of the sealing cover 221; the driving piece 21 can drive the sealing cover 221 to move along the vertical direction so that the sealing cover 221 covers the pull cylinder 10, and at least one sealing ring 2221 abuts against the flange part 12; the sealing cover 221 is provided with a vacuum-pumping port 2211, and when the sealing cover 221 and the pull cylinder 10 are in a buckled state, the vacuum-pumping piece 30 is communicated with the accommodating space through the vacuum-pumping port 2211.

In the defoaming device, the flange part 12 is arranged on the drawing cylinder 10 by arranging the plurality of concentric sealing rings 2221 on the lower side of the sealing cover 221, and when the diameters of the drawing cylinder body 11 and the flange part 12 are changed, the sealing rings 2221 with corresponding diameters are matched with each other, that is, at least one sealing ring 2221 of flanges with different diameters falls on the flange part 12, so that the effect of adapting one sealing cover 221 to the drawing cylinder 10 with various diameters is achieved; moreover, this defoaming equipment passes through the setting of driving piece 21 for sealed lid 221 can follow vertical direction motion under the drive of driving piece 21, on the one hand, need not the temporary mounting hoist and mount piece when uncapping, on the other hand, the orbit of driving piece 21 is along vertical direction, can guarantee that sealed lid 221 is accurate to fall to the opening part of drawing jar 10, realizes through driving piece 21 in the lock between drawing jar 10 and the sealed lid 221, has saved the setting of the part of fixed drawing jar 10 and sealed lid 221 equally, and the operation is accurate and simple, quick.

In this embodiment, the driving member 21 is a cylinder, and the cylinder has the advantages of rapid response and low cost. In other embodiments, the driving member 21 may be other elements that can output linear motion, such as a linear module or a screw nut mechanism, which is not limited herein.

Preferably, as shown in fig. 1, the sealing mechanism 22 further comprises a stirring assembly 223, the stirring assembly 223 comprising a support member (hidden, not labeled) mounted at the output end of the driver 21, a stirring driver 2232, and a stirring member 2233; the stirring driver 2232 is mounted to the support; the stirring member 2233 is in transmission connection with the output end of the stirring driving member 2232 and pivoted with the sealing cover 221, and the stirring driving member 2232 can drive the stirring member 2233 to rotate so as to stir the materials. Through the above arrangement, the inside of the pull cylinder 10 is vacuumized while stirring the stirring member 2233, which is advantageous for rapid floating of bubbles and can accelerate the speed of bubble removal. At the same time, the support and seal cap 221 assembly is also connected by a connector.

Preferably, the stirring assembly 223 further comprises a conveyor belt 2234 (the supporting member is shielded by the conveyor belt 2234), the conveyor belt 2234 is tensioned by two rollers, one roller is connected to the output end of the stirring driver 2232, and the other roller is coaxially fixed to one end of the stirring driver 2233.

Further, as shown in fig. 1, the stirring member 2233 includes an extension rod 22331 and a stirring paddle 22332, and one end of the extension rod 22331 is in driving connection with the output end of the stirring driver 2232 and pivotally connected to the sealing cover 221; a stirring paddle 22332 is mounted at the other end of the extension rod 22331, the stirring paddle 22332 being used to stir the material. Through the above arrangement, the material in the drawing cylinder 10 is fully stirred.

Still further, the stirring paddle 22332 includes at least two stirring blades 223321, at least two rotating blades being spaced apart in the circumferential direction of the other end of the extension rod 22331. That is, the number of the stirring blades 223321 may be two, three or more, and is not limited herein. In other embodiments, the stirring paddle is not limited to a paddle type, but may be a turbine type, an anchor type or a screw type, and the stirring paddle can fully stir the material, so that the air bubbles quickly float, which is not limited herein.

Since the stroke of the driving member 21 is generally relatively large, after the driving member 21 stops driving, the stirring paddle 22332 is separated from the pull cylinder 10 by a relatively long distance, which is not only unnecessary, but also makes the sealing mechanism 22 difficult to implement under conditions such as maintenance as the lifting is too high.

In order to solve the above problems, as shown in fig. 1, the stirring assembly 223 further includes a stopper 2235 and a stopper switch 2231, the stopper 2235 is connected to the supporting member, and the driving member 21 can drive the stopper 2235 to move in the vertical direction; the limit switch 2231 is communicatively connected to the driving member 21, and the limit member 2235 can trigger the limit switch 2231 at a predetermined position to stop driving the driving member 21. With the above arrangement, the limit member 2235 triggers the limit switch 2231 at the preset position, i.e., when the height of the stirring paddle 22332 is higher than the height of the pull cylinder 10, so that the driving member 21 stops driving, and the output end of the driving member 21 is prevented from extending to an excessive stroke.

Specifically, as shown in fig. 1, the limiter 2235 includes a main body 22351 and a trigger 22352 connected to each other, the main body 22351 extends in a vertical direction, one end is connected to the support, the other end is connected to the trigger 22352, the trigger 22352 protrudes from the main body 22351 in a horizontal direction, the limiter 2231 has a lever portion toward the limiter 2235, and the protrusion can contact the lever portion during the movement of the limiter 2235 in the vertical direction, so that the lever portion is triggered to stop the driving of the driver 21.

In the prior art, in the process of vacuumizing the drawing cylinder 10, the vacuumizing piece 30 is generally communicated through an air inlet pipe, that is, one end of the air inlet pipe is connected with the vacuumizing port 2211, and the other end of the air inlet pipe is connected with the vacuumizing piece 30, however, the volatilized solvent is mixed in the pumped air, and the volatilized solvent enters the vacuumizing piece 30 to pollute the vacuumizing piece 30.

In order to solve the above problem, as shown in fig. 1, the defoaming device further includes a liquid storage member 40, the liquid storage member 40 is provided with an air inlet 41, an air outlet 42 and a liquid flowing port 43, the gas mixed with the volatile solvent enters the liquid storage member 40 from the air inlet 41, the volatile solvent is liquefied in the liquid storage member 40, the gas is discharged from the air outlet 42 and enters the vacuumizing member 30, and the liquid flowing port 43 is provided with a first valve 44. It will be appreciated that in this embodiment, in addition to the air inlet pipe 60 being provided between the air inlet 41 and the vacuum suction port 2211, an air outlet pipe 70 is provided between the air outlet 42 and the vacuum suction member 30, so that the volatile solvent is collected in the liquid storage member 40, and further the air discharged from the air outlet pipe 70 is purified, and the vacuum suction member 30 is prevented from being polluted. The air intake pipe 60 is a hose, and other parts do not interfere with the air intake pipe 60 when the driving element 21 is operated.

Wherein, the first valve 44 is arranged to facilitate the outflow of the liquefied solvent.

Preferably, the sealing device 20 further comprises a second valve 23, the pipeline connected with the vacuum pumping port 2211 is provided with the second valve 23, and the second valve 23 is configured to prevent the liquefied volatile solvent from volatilizing therein when the vacuum pumping member 30 is not in operation, and then flows back into the pull cylinder 10 from the air inlet pipe 60.

Preferably, as shown in fig. 2, the sealing cover 221 is further provided with a pressure stabilizing tube 228, and the pressure stabilizing tube 228 is provided with a pressure stabilizing valve 224. With the above arrangement, after the evacuation operation is completed, the pressure inside and outside the cylinder 10 can be balanced by opening the pressure stabilizing valve 224.

Preferably, as shown in fig. 2, a pressure gauge 225 is provided on the sealing cover 221. The condition of the air pressure in the pull cylinder 10 can be clearly known so as to perform timely pressure relief operation.

Preferably, as shown in fig. 2, the sealing cover 221 is further provided with a visible window 226, the visible window 226 is pivoted with a cleaning member 227, the cleaning member 227 is attached to the inner surface of the visible window 226, the cleaning member 227 can be rotated to wipe the visible window 226, and when the interior of the pull cylinder 10 is fogged, water mist on the visible window 226 can be cleaned in time, so that the glue state in the pull cylinder 10 can be observed clearly.

Preferably, as shown in fig. 2 and 3, the defoaming device further includes a pull cylinder limiting assembly 50, the pull cylinder limiting assembly 50 includes at least two guide members 51 and a limiting block 52, the two guide members 51 are arranged at intervals along a first direction (X direction in fig. 3), the guide members 51 extend along a second direction (Y direction in fig. 3, the Y direction is perpendicular to the X direction), the limiting block 52 is mounted at the same end of each guide member 51, and the bottom of the pull cylinder 10 is respectively slidably matched with the at least two guide members 51 and can be limited by the limiting block 52 so that the pull cylinder 10 is located under the sealing cover 221 plate. By the arrangement, the pull cylinder 10 can slide along the guide piece 51 to the limiting block 52 to be limited, and then the pull cylinder is opposite to the sealing cover 221, and manual alignment is not needed.

In this embodiment, the guide member 51 is a guide groove, the pull cylinder 10 further includes a base 13 and a universal wheel 14, the pull cylinder body 11 is mounted on the base 13, the universal wheel 14 is mounted under at least four corners of the base 13, the universal wheel 14 is slidably matched with the corresponding guide groove, and the side edges of the universal wheel 14 and/or the base 13 can be abutted against the limiting block 52. Through the arrangement, when the diameter of the pull cylinder body 11 of each pull cylinder 10 is changed, the same base 13 and universal wheels 14 are adopted, and the pull cylinder body 11 is arranged at the central position of the base 13, so that after different pull cylinders 10 are limited by the limiting block 52, the pull cylinder bodies 11 are coaxial with the sealing covers 221, and the suitability of the pull cylinder limiting assembly 50 is improved.

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 (10)

1. Defoaming equipment, its characterized in that includes draw jar (10), sealing device (20) and evacuation spare (30), draw jar (10) including draw jar body (11) and flange portion (12), draw jar body (11) to form the accommodation space, flange portion (12) by draw jar upper edge outwards extension of body (11) forms, sealing device (20) include:

a driving member (21) capable of outputting a movement in a vertical direction;

the sealing mechanism (22) comprises a sealing cover (221) and a sealing assembly (222), the sealing cover (221) is connected with the output end of the driving piece (21), the sealing assembly (222) comprises a plurality of sealing rings (2221) which are concentrically arranged, and the sealing rings (2221) are all arranged on the lower side of the sealing cover (221); the driving piece (21) can drive the sealing cover (221) to move along the vertical direction so that the sealing cover (221) covers the pulling cylinder (10), and at least one sealing ring (2221) is abutted against the flange part (12);

the vacuum suction opening (2211) is formed in the sealing cover (221), and when the sealing cover (221) and the pulling cylinder (10) are in a buckling state, the vacuum suction piece (30) is communicated with the accommodating space through the vacuum suction opening (2211).

2. The defoaming apparatus of claim 1, wherein the sealing mechanism (22) further comprises a stirring assembly (223), the stirring assembly (223) comprising:

a support member mounted to an output end of the driving member (21);

a stirring drive (2232) mounted to the support;

the stirring piece (2233) is in transmission connection with the output end of the stirring driving piece (2232) and pivoted with the sealing cover (221), and the stirring driving piece (2232) can drive the stirring piece (2233) to rotate so as to stir materials.

3. The defoaming apparatus according to claim 2, characterized in that said stirring element (2233) comprises:

one end of the extension rod (22331) is in transmission connection with the output end of the stirring driving piece (2232) and pivoted with the sealing cover (221);

and a stirring paddle (22332), wherein the stirring paddle (22332) is arranged at the other end of the extension rod (22331), and the stirring paddle (22332) is used for stirring the materials.

4. The defoaming apparatus of claim 2, wherein the stirring assembly (223) further comprises:

the limiting piece (2235) is connected with the supporting piece, and the driving piece (21) can drive the limiting piece (2235) to move along the vertical direction;

and the limit switch (2231) is in communication connection with the driving piece (21), and the limit piece (2235) can trigger the limit switch (2231) at a preset position so as to stop driving of the driving piece (21).

5. The defoaming device according to any one of claims 1 to 4, characterized in that it further comprises a liquid storage member (40), said liquid storage member (40) is provided with an air inlet (41), an air outlet (42) and a liquid outlet (43), the gas mixed with the volatile solvent enters said liquid storage member (40) from said air inlet (41), said volatile solvent is liquefied inside said liquid storage member (40), said gas is discharged from said air outlet (42) and enters said vacuuming member (30), and said liquid outlet (43) is provided with a first valve (44).

6. The defoaming apparatus of any one of claims 1-4, further comprising a pull cylinder stop assembly (50), the pull cylinder stop assembly (50) comprising:

at least two guide members (51) arranged at intervals along a first direction, the guide members (51) extending along a second direction, the first direction being perpendicular to the second direction;

the limiting blocks (52) are arranged at the same ends of the guide pieces (51), the bottoms of the pulling cylinders (10) are respectively in sliding fit with at least two guide pieces (51) and can be limited to the limiting blocks (52) so that the pulling cylinders (10) are located under the sealing cover (221) plate.

7. The defoaming device according to claim 6, wherein the guide (51) is a guide groove, the pull cylinder (10) further comprises a base (13) and universal wheels (14), the pull cylinder body (11) is mounted on the base (13), the universal wheels (14) are mounted below at least four corners of the base (13), the universal wheels (14) are in sliding fit with the corresponding guide grooves, and the universal wheels (14) and/or the sides of the base (13) can be abutted with the limiting blocks (52).

8. The defoaming device according to any one of claims 1 to 4, characterized in that a second valve (23) is provided on the line connecting the evacuation port (2211);

and/or the sealing cover (221) is also provided with a pressure stabilizing tube (228), and the pressure stabilizing tube (228) is provided with a pressure stabilizing valve (224).

9. A defoaming device according to any one of claims 1 to 4, characterised in that said sealing cover (221) is provided with a pressure gauge (225).

10. The defoaming device according to any one of claims 1 to 4, characterized in that the sealing cover (221) is further provided with a visual window (226), the visual window (226) is pivoted with a cleaning element (227), the cleaning element (227) is attached to the inner surface of the visual window (226), and the cleaning element (227) can be rotated to wipe the visual window (226).