CN110694852A - Positive and negative pressure impregnation equipment and method for porous material - Google Patents
Positive and negative pressure impregnation equipment and method for porous material Download PDFInfo
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- CN110694852A CN110694852A CN201911055845.XA CN201911055845A CN110694852A CN 110694852 A CN110694852 A CN 110694852A CN 201911055845 A CN201911055845 A CN 201911055845A CN 110694852 A CN110694852 A CN 110694852A
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- impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/09—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles
Abstract
The invention relates to the technical field of vacuum impregnation, in particular to positive and negative pressure impregnation equipment and a positive and negative pressure impregnation method for a porous material. The utility model provides a porous material positive negative pressure impregnation equipment, including the flooding jar, drive arrangement and positive negative pressure device, the flooding jar is including corresponding cavity and the top cap that sets up, drive arrangement includes cylinder and slide bar, cylinder and slide bar connection, the slide bar passes top cap and top cap sliding connection, the bottom of slide bar is connected with the flooding net, positive negative pressure device includes measuring device, the connecting pipe, measuring device includes barometer and trachea, the barometer is connected with the trachea, trachea and flooding jar intercommunication, connecting pipe and trachea intercommunication, connecting pipe one end and vacuum pump connection, the other end and the air compressor of connecting pipe are connected. The positive and negative pressure impregnation equipment and the method for the porous material solve the problems of poor combination effect and long impregnation time of the impregnation solution and the porous material.
Description
Technical Field
The invention relates to the technical field of vacuum impregnation, in particular to positive and negative pressure impregnation equipment and a positive and negative pressure impregnation method for a porous material.
Background
The porous material is commonly used in an impregnation process, the common method is normal pressure impregnation or negative pressure adsorption impregnation, a large amount of air is in gaps of the porous material under normal pressure, and the impregnation solution is difficult to be fully impregnated. The existing negative pressure impregnation is to promote impregnation solution filling by means of capillary force of pores of a material and the pressure difference between negative pressure and atmospheric pressure, the negative pressure of vacuum of common equipment is often below 1pa, namely, the negative pressure is close to the limit and can only be infinitely close to 0pa, so that the pressure difference between the negative pressure and the atmospheric pressure is not large, when the porous material is faced with small pore diameter and deep pores, or the viscosity of the impregnation solution is large, the impregnation solution is difficult to deeply penetrate into the pores, the impregnation is insufficient, the bonding effect of the impregnation solution and the material is poor, or the required impregnation time is long.
Disclosure of Invention
Technical problem to be solved
The invention provides positive and negative pressure impregnation equipment and a method for a porous material, and aims to solve the problems of poor combination effect and long impregnation time of the porous material and an impregnation solution.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
the invention provides a positive and negative pressure impregnation device for porous materials, which comprises an impregnation tank, a driving device and a positive and negative pressure device, wherein the impregnation tank is provided with a plurality of impregnation holes;
the impregnation tank comprises a cavity and a top cover which are correspondingly arranged;
the driving device comprises an air cylinder and a sliding rod, the air cylinder is connected with the sliding rod, the sliding rod penetrates through the top cover to be connected with the top cover in a sliding mode, and the bottom end of the sliding rod is connected with an impregnation net;
the positive and negative pressure device comprises a measuring device and a connecting pipe;
the measuring device comprises a barometer and an air pipe, the barometer is connected with the air pipe, the air pipe is communicated with the impregnation tank, the connecting pipe is communicated with the air pipe, one end of the connecting pipe is connected with a vacuum pump, and the other end of the connecting pipe is connected with an air compressor.
According to the invention, the top end of the cavity and the bottom end of the top cover are correspondingly provided with annular sealing grooves, and annular sealing rings are arranged in the sealing grooves.
According to the invention, a sliding rod sealing ring is arranged at the joint of the sliding rod and the top cover.
According to the invention, the cylinder and the slide bar are connected by a connecting buckle.
According to the invention, the thickness of the impregnation net is 1mm-3mm, and the pore diameter of the impregnation net is 4mm-10 mm.
According to the invention, the annular sealing ring and the sliding rod sealing ring are made of polyurethane.
According to the invention, the material of the impregnation tank, the slide bar and the impregnation mesh is one of steel 304, 304L, 316, 309, 316 and 317.
The invention also provides a positive and negative pressure impregnation method of the porous material, which comprises the following steps:
s1, opening a top cover of the dipping tank, and adding a dipping solution into the cavity;
s2, starting a driving device, enabling an air cylinder to pull the slide rod to ascend until the impregnation net is positioned above the impregnation solution, uniformly placing a porous material on the impregnation net, and fastening a plurality of bolts for connecting the top cover and the cavity;
s3, opening a vacuum pump, vacuumizing to keep the air pressure value in the impregnation tank in a negative pressure state, and discharging the gas in the pores of the porous material;
s4, starting a driving device to enable the cylinder to push the sliding rod to slide downwards until the porous material on the dipping net is dipped into the dipping solution;
and S5, closing the vacuum pump, opening the air compressor to keep the air pressure value in the impregnation tank in a positive pressure state, and fully immersing the impregnation solution into the gaps of the porous material under the action of the positive pressure to finish the impregnation.
According to the present invention, the negative pressure value at which the pressure value in the impregnation tank is maintained in a negative pressure state is 0.1pa to 1 pa.
According to the present invention, the pressure value in the impregnation tank is maintained at a positive pressure of 800kpa to 1000 kpa.
(III) advantageous effects
The invention has the beneficial effects that:
the positive and negative pressure impregnation equipment for the porous material, provided by the invention, has the advantages that the air cylinder is adopted to push the sliding rod to slide up and down, the operation is simple and convenient, the annular sealing ring is arranged between the top cover and the cavity, the air tightness in the impregnation tank is improved, the capacity of bearing the gas pressure in the impregnation tank is improved, and the impregnation effect of the porous material is improved.
According to the positive and negative pressure impregnation method for the porous material, the porous material is immersed into the impregnation solution in a negative pressure state, then positive pressure is applied, the impregnation solution and the porous material are fully filled or reacted, the impregnation time is shortened, and the impregnation effect of the porous material in the impregnation solution is further enhanced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the porous material positive and negative pressure impregnation equipment of the present invention;
FIG. 2 is a side view of A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a top view of B-B of FIG. 2 according to the present invention;
FIG. 4 is a scanning electron micrograph of a pre-impregnated porous material of the present invention;
FIG. 5 is a scanning electron micrograph of an impregnated porous material according to the present invention.
[ description of reference ]
1: a barometer; 2: an air tube; 3: a connecting pipe; 4: a first valve; 5: a second valve;
6: a top cover; 7: a cavity; 8: a slide bar; 9: a connecting buckle; 10: a sliding rod sealing ring;
11: impregnating the web; 12: a lower seal groove; 13: an upper seal groove; 14: an annular seal ring.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
As shown in fig. 1-2, the present embodiment provides a porous material positive and negative pressure impregnation apparatus, which includes an impregnation tank, a driving device, and a positive and negative pressure device, wherein the impregnation tank includes a cavity 7 and a top cover 6, the driving device includes an air cylinder and a slide bar 8, the air cylinder is connected to the slide bar 8, the slide bar 8 penetrates through the top cover 6 and is slidably connected to the top cover 6, the slide bar 8 keeps a seal when sliding up and down, and the bottom end of the slide bar 8 is connected to an impregnation net 11.
Positive and negative pressure device includes measuring device and connecting pipe 3, measuring device includes barometer 1 and trachea 2, barometer 1 is connected with trachea 2, trachea 2 and impregnation tank intercommunication, connecting pipe 3 and trachea 2 intercommunication, 3 one end of connecting pipe and vacuum pump connection, the other end and the air compressor of connecting pipe 3 are connected, wherein cavity 7 and top cap 6 pass through the bolt can dismantle the connection, barometer 1 can realize the atmospheric pressure under the positive and negative pressure state, one side of connecting pipe 3 is equipped with the switch that first valve 4 is used for controlling the vacuum pump, the opposite side of connecting pipe 3 is equipped with the switch that second valve 5 is used for controlling the air compressor.
Furthermore, an upper sealing groove 13 which is formed by upwards concave arranging the bottom end of the top cover 6 and a lower sealing groove 12 which is formed by downwards concave arranging the top end edge of the cavity 7 are correspondingly arranged to form an annular sealing groove, an annular sealing ring 14 is arranged in the annular sealing groove, so that high air pressure in the impregnation tank can be kept constant for a long time, namely, vacuum or high air pressure is kept unchanged, and the impregnation effect of the porous material is improved.
Further, a sliding rod sealing ring 10 is arranged at the joint of the sliding rod 8 and the top cover 6, and when the sliding rod 8 works, the sliding rod sealing ring 10 can keep good air tightness in the impregnation tank.
The annular sealing ring 14 and the sliding rod sealing ring 10 are made of polyurethane.
In practical application, the cylinder and the slide rod 8 are connected by a connecting buckle 9, but may be connected by other means, such as a connecting key.
As shown in FIG. 3, the thickness of the dipping net 11 is 1mm to 3mm, and the pore diameter of the dipping net 11 is 4mm to 10 mm. In the embodiment, the impregnation net 11 is used for bearing the porous material and permeating the impregnation solution to immerse the porous material in the impregnation solution, in practical application, the thickness and the pore diameter of the impregnation net 11 are obtained through multiple use tests, the impregnation net 11 is thick in thickness and strong in bearing capacity, the pore diameter of the impregnation net 11 is large, so that the impregnation solution can be conveniently permeated, and the manufacturing and the processing are convenient.
Furthermore, the material of the impregnation tank, the slide bar 8 and the impregnation net 11 is one of steel 304, steel 304L, steel 316, steel 309, steel 316 and steel 317, and the impregnation tank has strong corrosion resistance and high strength, and can maintain high air pressure in the impregnation tank for a long time.
In another aspect, the present invention provides a method for impregnating a porous material under positive and negative pressure, including the following steps:
s1, opening the top cover 6 of the dipping tank, and adding dipping solution into the cavity 7;
s2, starting a driving device to enable the sliding rod 8 to ascend, enable the dipping net 11 to be located above the dipping solution, evenly place the porous material on the dipping net 11, and fasten a plurality of bolts for connecting the top cover 6 and the cavity 7;
s3, opening a vacuum pump, vacuumizing to keep the air pressure value in the impregnation tank in a negative pressure state, and discharging the gas in the pores of the porous material;
s4, starting a driving device to enable the cylinder to push the sliding rod 8 to slide downwards until the porous material on the dipping net 11 is dipped into the dipping solution;
and S5, closing the vacuum pump, opening the air compressor to keep the air pressure value in the impregnation tank in a positive pressure state, and fully immersing the impregnation solution into the gaps of the porous material under the action of the positive pressure to finish the impregnation.
Specifically, the pressure value of the normal atmospheric pressure is 101kpa, the pressure value below the normal atmospheric pressure is negative, the pressure value above the normal atmospheric pressure is positive, the pressure value of the pressure inside the impregnation tank is maintained at the negative pressure state, and the negative pressure value is 0.1pa to 1pa, in the embodiment, the negative pressure value is 0.1pa, and the negative pressure value inside the impregnation tank is mainly determined by the performance of the vacuum pump and the sealing of the tank body. In practical applications, the volume of the impregnation solution is determined according to the amount, size, etc. of the porous material.
Specifically, the pressure value in the impregnation tank is maintained at a positive pressure of 800kpa to 1000 kpa. The positive pressure value in the impregnating tank is limited by the sealing and pressure bearing capacity of the impregnating tank, air leakage and even bursting can be caused by excessive pressure, in practical application, the selected positive pressure value is 850kpa, the positive pressure is used for transmitting the pressure to the impregnating solution through gas, and the impregnating solution is promoted to be filled in pores of the porous material more quickly and sufficiently.
As shown in fig. 4, which is a scanning electron microscope image of the porous material before impregnation in this embodiment, it can be seen that the porous material before impregnation has many and complicated pores and different pore sizes and depths.
As shown in fig. 5, which is a scanning electron microscope image of the porous material after being impregnated in this embodiment, it can be seen that the surface of the porous material after being impregnated has no obvious pores, and the pores are fully filled with the impregnating solution, so that the filling effect is good.
In the embodiment, the negative pressure is kept before the porous material is soaked, air is sufficiently exhausted, the porous material is soaked in the soaking solution in the negative pressure state, then the positive pressure is applied, the soaking solution and the porous material are sufficiently filled or reacted, and the soaking effect of the porous material and the soaking solution is enhanced. In the embodiment, the negative pressure is maintained and then the positive pressure is increased, and the pressure difference between the positive pressure and the atmospheric pressure is far greater than that between the negative pressure and the atmospheric pressure, so that the promotion effect on filling pores by the impregnating solution is stronger.
According to the positive and negative pressure impregnation equipment for the porous material, the air cylinder is adopted to push the sliding rod 8 to slide up and down, the operation is simple and convenient, the annular sealing ring 14 is arranged between the top cover 6 and the cavity 7, the air tightness in the impregnation tank is improved, the capacity of bearing the air pressure in the impregnation tank is improved, and the impregnation effect of the porous material is improved.
According to the positive and negative pressure impregnation method for the porous material, the porous material is immersed into the impregnation solution in a negative pressure state, then positive pressure is applied, the impregnation solution and the porous material are fully filled or reacted, the impregnation time is shortened, and the impregnation effect of the porous material in the impregnation solution is further enhanced.
It should be understood that the above description of specific embodiments of the present invention is only for the purpose of illustrating the technical lines and features of the present invention, and is intended to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, but the present invention is not limited to the above specific embodiments. It is intended that all such changes and modifications as fall within the scope of the appended claims be embraced therein.
Claims (10)
1. A porous material positive and negative pressure impregnation device is characterized by comprising an impregnation tank, a driving device and a positive and negative pressure device;
the impregnation tank comprises a cavity (7) and a top cover (6) which are correspondingly arranged;
the driving device comprises an air cylinder and a sliding rod (8), the air cylinder is connected with the sliding rod (8), the sliding rod (8) penetrates through the top cover (6) to be connected with the top cover (6) in a sliding mode, and the bottom end of the sliding rod (8) is connected with an impregnation net (11);
the positive and negative pressure device comprises a measuring device and a connecting pipe (3);
the measuring device comprises a barometer (1) and an air pipe (2), the barometer (1) is connected with the air pipe (2), the air pipe (2) is communicated with the impregnation tank, the connecting pipe (3) is communicated with the air pipe (2), one end of the connecting pipe (3) is connected with a vacuum pump, and the other end of the connecting pipe (3) is connected with an air compressor.
2. The positive and negative pressure impregnation equipment for porous materials according to claim 1, wherein the top end of the cavity (7) and the bottom end of the top cover (6) are provided with annular sealing grooves, and annular sealing rings (14) are arranged in the sealing grooves.
3. The positive and negative pressure impregnation equipment for porous materials according to claim 2, characterized in that a slide rod sealing ring (10) is arranged at the connection of the slide rod (8) and the top cover (6).
4. The apparatus for impregnation of porous material under positive and negative pressure according to claim 3, characterized in that the cylinder and the slide bar (8) are connected by a coupling buckle (9).
5. The apparatus for impregnation of porous material with positive and negative pressure according to claim 4, characterized in that the thickness of the impregnation mesh (11) is 1mm-3mm and the pore size of the impregnation mesh (11) is 4mm-10 mm.
6. The positive and negative pressure impregnation equipment for porous materials according to claim 5, characterized in that the material of the ring-shaped sealing ring (14) and the sliding rod sealing ring (10) is polyurethane.
7. The positive and negative pressure impregnation apparatus for porous materials according to claim 6, wherein the material of the impregnation tank, the slide bar (8) and the impregnation mesh (11) is one of steel 304, steel 304L, steel 316, steel 309, steel 316 and steel 317.
8. A positive and negative pressure impregnation method for a porous material is characterized by comprising the following steps:
s1, opening the top cover (6) of the dipping tank, and adding a dipping solution into the cavity (7);
s2, starting a driving device, enabling an air cylinder to pull the sliding rod (8) to ascend until the dipping net (11) is positioned above a dipping solution, uniformly placing a porous material on the dipping net (11), and fastening a plurality of bolts for connecting the top cover (6) and the cavity (7);
s3, opening a vacuum pump, vacuumizing to keep the air pressure value in the impregnation tank in a negative pressure state, and discharging the gas in the pores of the porous material;
s4: starting a driving device to enable an air cylinder to push the sliding rod (8) to slide downwards until the porous material on the dipping net (11) is immersed in the dipping solution;
s5: and (3) closing the vacuum pump, opening the air compressor, keeping the air pressure value in the impregnation tank in a positive pressure state, and fully immersing the impregnation solution into the gaps of the porous material under the action of the positive pressure to finish impregnation.
9. The positive-negative pressure impregnation method of the porous material as claimed in claim 8, wherein the negative pressure value of the impregnation tank in the negative pressure state is 0.1pa to 1 pa.
10. The positive-negative pressure impregnation method of the porous material according to claim 9, wherein the positive pressure value at which the pressure value in the impregnation tank is maintained in the positive pressure state is 800kpa to 1000 kpa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911055845.XA CN110694852A (en) | 2019-10-31 | 2019-10-31 | Positive and negative pressure impregnation equipment and method for porous material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911055845.XA CN110694852A (en) | 2019-10-31 | 2019-10-31 | Positive and negative pressure impregnation equipment and method for porous material |
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| CN110694852A true CN110694852A (en) | 2020-01-17 |
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| CN201911055845.XA Pending CN110694852A (en) | 2019-10-31 | 2019-10-31 | Positive and negative pressure impregnation equipment and method for porous material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112676100A (en) * | 2020-12-16 | 2021-04-20 | 刘青丽 | Multi-station vacuum impregnation device for preparing porous material |
| CN115340339A (en) * | 2022-09-20 | 2022-11-15 | 湖南科技大学 | Inorganic decorative plate and preparation method thereof |
| WO2023202715A1 (en) * | 2022-04-21 | 2023-10-26 | 苏州医本生命科技有限公司 | Posterior drug-loaded microsphere, drug loading method, drug loading device, and use |
-
2019
- 2019-10-31 CN CN201911055845.XA patent/CN110694852A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112676100A (en) * | 2020-12-16 | 2021-04-20 | 刘青丽 | Multi-station vacuum impregnation device for preparing porous material |
| WO2023202715A1 (en) * | 2022-04-21 | 2023-10-26 | 苏州医本生命科技有限公司 | Posterior drug-loaded microsphere, drug loading method, drug loading device, and use |
| CN115340339A (en) * | 2022-09-20 | 2022-11-15 | 湖南科技大学 | Inorganic decorative plate and preparation method thereof |
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