CN116077996B - Continuous vacuum defoaming machine and defoaming method - Google Patents
Continuous vacuum defoaming machine and defoaming method Download PDFInfo
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- CN116077996B CN116077996B CN202310364367.0A CN202310364367A CN116077996B CN 116077996 B CN116077996 B CN 116077996B CN 202310364367 A CN202310364367 A CN 202310364367A CN 116077996 B CN116077996 B CN 116077996B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0042—Degasification of liquids modifying the liquid flow
- B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0036—Flash degasification
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Degasification And Air Bubble Elimination (AREA)
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Abstract
The invention relates to the technical field of coating finishing, and particularly discloses a continuous vacuum defoaming machine and a defoaming method, which can perform online liquid feeding and continuous defoaming operation, and comprise a sealed box, wherein a vacuum pump is externally connected through an extraction opening; the defoaming tank is provided with an opening at the upper end and is arranged in the sealing box and is used for containing materials to perform defoaming operation; the upper end of the buffer tank is provided with an opening, the buffer tank is arranged in the sealing box and is communicated with the defoaming tank through a communication pipeline, the bottom of the buffer tank is connected with a liquid discharge pipeline, and an electromagnetic valve is arranged in the communication pipeline; the spiral stirring mechanism comprises a stirring shaft, a spiral stirring blade and a first power mechanism, wherein the stirring shaft is rotatably and hermetically arranged at the top of the sealing box, the spiral stirring blade is arranged at the lower part of the stirring shaft and stretches into the defoaming tank, and the first power mechanism drives the stirring shaft to rotate; the sealing pressurizing mechanism comprises a sealing cover which is matched with the stirring shaft and the inner wall of the defoaming tank in a sliding sealing manner, and a second power mechanism which is arranged in the sealing box and used for driving the sealing cover to ascend and descend, and the sealing cover is connected with the liquid inlet pipeline.
Description
Technical Field
The invention relates to the technical field of coating finishing, in particular to a continuous vacuum defoaming machine and a defoaming method.
Background
The coating finishing is to uniformly coat one or more layers of polymer compound coating agent with special functions on one or both surfaces of the fabric surface, thereby obtaining the fabric with special appearance or special functions. The coating slurry is formulated and vacuum defoamed prior to finishing the coating to remove residual air entrained during agitation.
Chinese published patent document (CN 102514209 a) discloses a defoaming method comprising the steps of: placing a containing barrel for containing a mixture of resin and curing agent into a vacuum defoaming box; closing an air inlet of the vacuum defoaming box, and pumping air from an air outlet of the vacuum defoaming box to vacuum; maintaining the pressure for 5-30 minutes; closing the air outlet, opening the air inlet, and recovering the pressure in the vacuum defoaming box; and opening a material port, and taking out the defoamed mixture. However, such defoaming device needs frequent air suction and air intake, the influence of frequent start of a vacuum pump on the service life of the device is bad, and the material barrel needs manual in and out every time, especially in actual operation, stirring blades are added in the defoaming box to stir and mechanically defoam the resin, and the in and out are unchanged due to the existence of the stirring blades, so that continuous production cannot be realized.
Disclosure of Invention
The invention aims to provide a continuous vacuum defoaming machine which can perform online liquid feeding and continuous defoaming operation.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
a continuous vacuum defoaming machine comprises
The sealed box is externally connected with a vacuum pump through an extraction opening;
the defoaming tank is provided with an opening at the upper end and is arranged in the sealing box and is used for containing materials to perform defoaming operation;
the upper end of the buffer tank is provided with an opening, the buffer tank is arranged in the sealing box and is communicated with the defoaming tank through a communication pipeline, the bottom of the buffer tank is connected with a liquid discharge pipeline, and an electromagnetic valve is arranged in the communication pipeline;
the spiral stirring mechanism comprises a stirring shaft, a spiral stirring blade and a first power mechanism, wherein the stirring shaft is rotatably and hermetically arranged at the top of the sealing box, the spiral stirring blade is arranged at the lower part of the stirring shaft and stretches into the defoaming tank, and the first power mechanism drives the stirring shaft to rotate;
the sealing pressurizing mechanism comprises a sealing cover which is matched with the stirring shaft and the inner wall of the defoaming tank in a sliding sealing manner, and a second power mechanism which is arranged in the sealing box and used for driving the sealing cover to ascend and descend, and the sealing cover is connected with the liquid inlet pipeline.
Preferably, the first end of the communicating pipeline is communicated with the bottom end of the inner cavity of the defoaming tank, the second end of the communicating pipeline is communicated with the upper end of the inner cavity of the buffer tank, and the first end of the communicating pipeline is higher than the second end.
Preferably, the shape of the sealing cover is matched with that of the defoaming tank, the first sealing component is pressed on the peripheral surface of the sealing cover, and the second sealing component is arranged on the sealing cover in a matched position with the stirring shaft.
The invention also provides a defoaming method, which adopts a continuous vacuum defoaming machine to execute the following steps:
s1, closing an electromagnetic valve, descending a sealing cover to seal the defoaming tank, and starting liquid inlet to a designated liquid level;
s2, operating a vacuum pump to enable the sealing box to reach a specified vacuum degree and keep the vacuum degree;
s3, lifting and resetting the sealing cover to open the defoaming tank;
s4, stirring is started, bubbles in the materials are driven to rise by using spiral stirring blades, and defoaming is carried out under the negative pressure effect of a sealing box outside the defoaming tank;
s5, stopping stirring and descending the sealing cover after defoaming is completed, so that the interior of the defoaming tank is pressurized to a positive pressure state and is maintained for a period of time;
s6, switching on an electromagnetic valve, wherein the negative pressure of the buffer tank and the positive pressure in the defoaming tank enable the defoamed material to flow to the buffer tank through a communicating pipeline, and further removing bubbles by utilizing a negative pressure sealing box in the flow-discharging process;
s7, after the drainage is completed, closing the electromagnetic valve, and at the moment, the interior of the defoaming tank is in a negative pressure state;
s8, lifting the sealing cover to be above a specified liquid level, maintaining the sealing cover, and starting liquid inlet;
and S9, after the liquid is fed in place, circularly and repeatedly executing the ascending steps S3-S8.
Preferably, the sealing cover is rapidly lifted in the step S3.
Preferably, the specified vacuum degree of the seal box is-0.03 MPa to-0.05 MPa.
Compared with the prior art, the invention has the following beneficial effects:
the vacuum defoaming machine comprises a defoaming tank and a buffer tank, wherein the buffer tank is used for receiving materials which are subjected to defoaming in the defoaming tank, and when a user uses the materials, the materials can be continuously taken from the buffer tank without waiting for defoaming, and the defoaming quality can be further improved by utilizing the vacuum negative pressure effect in the sealing box in the process of draining to the buffer tank.
According to the invention, a plurality of functions are realized by changing different working heights or working positions of the sealing cover: when the defoaming tank is opened in the ascending reset position, the defoaming tank and the sealing box keep the same vacuum degree, defoaming is realized, and the defoaming effect is convenient to be intuitively known through the observation window; when the sealed defoaming tank is lowered and positioned at a second working height position above the upper limit of the liquid level of the defoaming tank, the communication pipeline is closed, so that on one hand, online liquid feeding is realized in a limited space in the defoaming tank, a box opening and lifting stirring mechanism is not needed, and rapid liquid feeding can be assisted by utilizing a primary negative pressure state of secondary liquid feeding, on the other hand, the pressure difference inside and outside the defoaming tank is increased along with the rising of the liquid level and occupation of the space of the defoaming tank, so that after the sealing cover is rapidly raised and reset, the material in the defoaming tank is rapidly depressurized, and the defoaming effect of promoting the floating of bubbles in the material is also realized; the sealing cover further descends before discharging, the limited space of the defoaming tank is compressed to achieve the pressurizing effect, and the pressurizing does not bring extra air, so that extra bubbles cannot be generated in the material besides the effect of accelerating discharging, and meanwhile, the negative pressure defoaming in the open cache tank is facilitated to be completed by accelerating discharging.
According to the invention, the defoaming tank is opened in the defoaming process, and the material at the bottom layer and bubbles can be driven to the liquid level under the combined action of the vacuum negative pressure of the sealing box and the spiral stirring blade in stirring, so that the defoaming time is shortened, and the working efficiency is improved.
The vacuum degree in the sealing box is kept unchanged, and the work load of the vacuum pump is reduced.
Drawings
FIG. 1 is a schematic view showing the structure of the vacuum defoaming machine in a first working height state of a sealing cover.
FIG. 2 is a schematic view showing the structure of the vacuum defoaming machine in the second working height state of the sealing cover.
FIG. 3 is a schematic view showing the structure of the vacuum defoaming machine in the third working height state of the sealing cover.
The marks in the figure: 10. a seal box; 20. a defoaming tank; 30. a cache tank; 40. a communication pipe; 41. an electromagnetic valve; 51. spiral stirring blades; 52. a first power mechanism; 61. sealing cover; 62. a second power mechanism; 63. a liquid inlet pipe; 64. a control valve; 611. a first seal assembly; 612. and a second seal assembly.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, the present embodiment provides a continuous vacuum defoaming machine including a seal box 10, a defoaming tank 20, a buffer tank 30, a screw stirring mechanism, and a seal pressurizing mechanism. Wherein, defoaming jar 20 and buffer tank 30 all set up inside seal box 10, and defoaming jar 20 is used for the splendid attire material to carry out defoaming operation, and buffer tank 30 is used for receiving the material that defoaming jar 20 defoaming was accomplished and can follow the continuous material of getting in buffer tank 30 when the user uses the material, the drain line is connected to buffer tank 30 bottom.
In this embodiment, the seal box 10 is provided with an air extraction opening and an air exhaust opening, the air extraction opening is externally connected with a vacuum pump through a pipeline, and the vacuum pump is utilized to make the seal box 10 have a certain vacuum degree, and the vacuum degree is generally set to be-0.03 MPa to-0.05 MPa. A vacuum gauge is arranged in the sealing box 10, and the air tightness and the vacuum state of the sealing box 10 can be observed in real time through the vacuum gauge. The exhaust port is used for communicating the sealing box 10 with the external environment, so that the sealing box 10 is restored to normal pressure, and is in a closed state in the defoaming operation of the invention. In addition, in order to facilitate the operator to observe the defoaming progress, the seal box 10 of this embodiment further has an observation window, which is made of transparent glass and is hermetically disposed.
In this embodiment, the defoaming tank 20 and the buffer tank 30 are both opened at the upper ends, so that the same vacuum degree as that of the sealing box 10 can be maintained in the opened state, and an operator can directly and intuitively connect the defoaming progress of the material liquid level from the upper opening through the observation window.
In this embodiment, the buffer tank 30 is connected to the defoaming tank 20 through a communication pipe 40, a first end of the communication pipe 40 is connected to the bottom end of the inner cavity of the defoaming tank 20, a second end of the communication pipe 40 is connected to the upper end of the inner cavity of the buffer tank 30, the first end of the communication pipe 40 is higher than the second end, an electromagnetic valve 41 is installed in the communication pipe 40, and the electromagnetic valve 41 is electrically connected to the PLC controller. When the electromagnetic valve 41 is opened, the communicating pipeline 40 is communicated, and the material in the defoaming tank 20 leaks into the buffer tank 30 under the action of the positive pressure pushing action of the defoaming tank 20 and the vacuum negative pressure suction action of the buffer tank 30.
In this embodiment, the spiral stirring mechanism includes a stirring shaft installed at the top of the sealing box 10 in a rotating and sealing manner, a spiral stirring blade 51 installed at the lower part of the stirring shaft and extending into the defoaming tank 20, and a first power mechanism 52 for driving the stirring shaft to rotate, wherein the first power mechanism 52 preferably adopts a stirring motor, the stirring shaft and the spiral stirring blade 51 can be rotated by starting the first power mechanism 52, and the spiral stirring blade 51 is helpful for driving the material and bubbles at the bottom layer to the liquid level.
In this embodiment, the sealing pressurizing mechanism includes a sealing cover 61 that is slidably and sealingly engaged with the stirring shaft and the inner wall of the defoaming tank 20, and a second power mechanism 62 installed in the sealing box 10 and used for driving the sealing cover 61 to move up and down, the power mechanism 62 preferably adopts a lifting cylinder, the sealing cover 61 is connected with a liquid inlet pipe 63, and the liquid inlet pipe 63 has a flexible pipe section and has a control valve 64 for controlling the on-off of the liquid inlet pipe 63. The shape of the sealing cover 61 is matched with that of the defoaming tank 20, a first sealing component 611 is pressed on the peripheral surface of the sealing cover 61, a second sealing component 612 is arranged on the position of the sealing cover 61 matched with the stirring shaft in a matched mode, the sealing isolation state of the defoaming tank 20 is ensured to be presented at the upper end opening of the defoaming tank 20 when the sealing cover 61 descends into the defoaming tank 20 through the first sealing component 611 and the second sealing component 612, and conditions are created for pressurizing in the limited space of the defoaming tank 20 without influencing the fluctuation of the vacuum degree of the sealing box 10.
The defoaming tank 20 is internally provided with a liquid level sensor, the liquid level sensor is electrically connected with the PLC, and liquid feeding is automatically stopped when liquid feeding reaches the upper limit of the liquid level defined by the liquid level sensor.
The invention also provides a defoaming method, which adopts a continuous vacuum defoaming machine to execute the following steps: s1, closing the electromagnetic valve 41, and lowering the sealing cover 61 to the second working height H 2 And sealing the defoaming tank 20, starting the liquid inlet to a designated liquid level H 0 ，H 2 Greater than H 0 As shown in fig. 2; s2, operating a vacuum pump to enable the sealing box 10 to reach a specified vacuum degree and keep the vacuum degree; s3, the sealing cover 61 is lifted and reset to the first working height H 1 And the defoaming tank 20 is opened; s4, stirring is started, and the spiral stirring blade 51 is utilized to drive bubbles in the material to rise and foam is removed under the negative pressure of the sealing box 10 outside the foam removing tank 20; s5, stopping stirring after defoaming is completed and lowering the sealing cover 61 to a third working height H 3 The third working height Yu Zuishang Fang Luoxuan is the installation height of the stirring vane, as shown in fig. 3, so that the inside of the defoaming tank 20 is pressurized to a positive pressure state and maintained for a while; s6, switching on the electromagnetic valve 41, wherein the negative pressure of the buffer tank 30 and the positive pressure in the defoaming tank 20 enable the defoamed material to drain to the buffer tank 30 through the communicating pipeline 40, andfurther bubble removal during the bleed-off process using the negative pressure seal box 10; s7, after the drainage is completed, closing the electromagnetic valve 41, and at the moment, the interior of the defoaming tank 20 is in a negative pressure state; s8, the sealing cover 61 is lifted to be above the designated liquid level and kept at the second working height H 2 Starting liquid inlet; and S9, after the liquid is fed in place, circularly and repeatedly executing the ascending steps S3-S8. Preferably, the step S3 is to rapidly raise the sealing cover 61 so that the pressure of the defoaming tank 20 suddenly changes to promote the rise of bubbles in the material. Step S5, firstly, quickly reducing the working height to a second working height H 2 Then slowly descend to the third working height H 3 。
While the basic principles and main features of the invention and advantages of the invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing description merely illustrate the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (10)
1. The continuous vacuum defoaming machine is characterized by comprising
The sealed box is externally connected with a vacuum pump through an extraction opening;
the defoaming tank is provided with an opening at the upper end and is arranged in the sealing box and is used for containing materials to perform defoaming operation;
the upper end of the buffer tank is provided with an opening, the buffer tank is arranged in the sealing box and is communicated with the defoaming tank through a communication pipeline, the bottom of the buffer tank is connected with a liquid discharge pipeline, and an electromagnetic valve is arranged in the communication pipeline;
the spiral stirring mechanism comprises a stirring shaft, a spiral stirring blade and a first power mechanism, wherein the stirring shaft is rotatably and hermetically arranged at the top of the sealing box, the spiral stirring blade is arranged at the lower part of the stirring shaft and stretches into the defoaming tank, and the first power mechanism drives the stirring shaft to rotate;
the sealing pressurizing mechanism comprises a sealing cover which is matched with the stirring shaft and the inner wall of the defoaming tank in a sliding sealing manner, and a second power mechanism which is arranged in the sealing box and used for driving the sealing cover to ascend and descend, and the sealing cover is connected with the liquid inlet pipeline; the sealing cover is provided with a first working height of the open defoaming tank, a second working height of the sealed defoaming tank which is higher than the liquid inlet level and a third working height of the sealed defoaming tank which is higher than the uppermost Fang Luoxuan stirring blade;
the vacuum degree in the sealing box is kept unchanged in the continuous defoaming operation; the negative pressure of the buffer tank and the positive pressure in the defoaming tank enable the defoamed material to flow to the buffer tank through the communicating pipeline, and the negative pressure sealing box is utilized to further remove bubbles in the flow discharging process.
2. The continuous vacuum defoamer of claim 1, wherein: the first end of the communication pipeline is communicated with the bottom end of the inner cavity of the defoaming tank, the second end of the communication pipeline is communicated with the upper end of the inner cavity of the cache tank, and the first end of the communication pipeline is higher than the second end.
3. The continuous vacuum defoamer of claim 1, wherein: the shape of the sealing cover is matched with that of the defoaming tank, the first sealing component is pressed on the peripheral surface of the sealing cover, and the second sealing component is arranged on the sealing cover in a matched position with the stirring shaft.
4. The continuous vacuum defoamer of claim 1, wherein: and a liquid level sensor is arranged in the defoaming tank.
5. The continuous vacuum defoamer of claim 1, wherein: and a vacuum gauge is arranged in the sealing box.
6. The continuous vacuum defoamer of claim 1, wherein: the seal box is provided with an observation window.
7. The continuous vacuum defoamer of claim 1, wherein: the seal box is also provided with an exhaust port.
8. A defoaming method, characterized by: the following steps are performed with the continuous vacuum defoamer of any of claims 1 to 7:
s1, closing an electromagnetic valve, descending a sealing cover to seal the defoaming tank, and starting liquid inlet to a designated liquid level;
s2, operating a vacuum pump to enable the sealing box to reach a specified vacuum degree and keep the vacuum degree;
s3, lifting and resetting the sealing cover to open the defoaming tank;
s4, stirring is started, bubbles in the materials are driven to rise by using spiral stirring blades, and defoaming is carried out under the negative pressure effect of a sealing box outside the defoaming tank;
s5, stopping stirring and descending the sealing cover after defoaming is completed, so that the interior of the defoaming tank is pressurized to a positive pressure state and is maintained for a period of time;
s6, switching on an electromagnetic valve, wherein the negative pressure of the buffer tank and the positive pressure in the defoaming tank enable the defoamed material to flow to the buffer tank through a communicating pipeline, and further removing bubbles by utilizing a negative pressure sealing box in the flow-discharging process;
s7, after the drainage is completed, closing the electromagnetic valve, and at the moment, the interior of the defoaming tank is in a negative pressure state;
s8, lifting the sealing cover to be above a specified liquid level, maintaining the sealing cover, and starting liquid inlet;
and S9, after the liquid is fed in place, circularly and repeatedly executing the ascending steps S3-S8.
9. The defoaming method according to claim 8, wherein: and step S3, the sealing cover is quickly lifted.
10. The defoaming method according to claim 8, wherein: the appointed vacuum degree of the sealing box is-0.03 MPa to-0.05 MPa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310364367.0A CN116077996B (en) | 2023-04-07 | 2023-04-07 | Continuous vacuum defoaming machine and defoaming method |
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| CN202310364367.0A CN116077996B (en) | 2023-04-07 | 2023-04-07 | Continuous vacuum defoaming machine and defoaming method |
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| CN116077996A CN116077996A (en) | 2023-05-09 |
| CN116077996B true CN116077996B (en) | 2023-06-09 |
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| CN117162318B (en) * | 2023-10-31 | 2024-01-26 | 江苏瑞斯达安全防护用品有限公司 | Raw material defoaming device for protective glove production |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204767629U (en) * | 2015-06-30 | 2015-11-18 | 九江雨纯生物科技有限公司 | Disconnect -type defoaming machine |
| JP2022176232A (en) * | 2017-11-02 | 2022-11-25 | 株式会社NejiLaw | Bubble refining/removing device, and charging device |
| CN213823561U (en) * | 2020-10-19 | 2021-07-30 | 浙江星华反光材料有限公司 | Equipment for removing bubbles in glue water in vacuum mode |
| CN217698041U (en) * | 2022-04-22 | 2022-11-01 | 上海富铭密封材料有限公司 | Adhesive vacuum defoaming device |
| CN218221863U (en) * | 2022-08-31 | 2023-01-06 | 深圳市泰睿科技有限公司 | Preparation device for reducing bubble tobacco tar |
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