CN211400528U - Suck-back prevention vacuum drying oven - Google Patents
Suck-back prevention vacuum drying oven Download PDFInfo
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- CN211400528U CN211400528U CN202020090978.2U CN202020090978U CN211400528U CN 211400528 U CN211400528 U CN 211400528U CN 202020090978 U CN202020090978 U CN 202020090978U CN 211400528 U CN211400528 U CN 211400528U
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Abstract
The utility model relates to the field of drying equipment, in particular to a suck-back prevention vacuum drying oven, which comprises an oven body, a vacuum pump, a vacuum tube and a suck-back prevention oven; a vacuum tube is communicated in the box body, and the other end of the vacuum tube is communicated with a vacuum pump; the vacuum pipe between the box body and the vacuum pump is communicated with a suck-back prevention box, a lifting sealing seat which ascends and descends in the vertical direction is arranged in the suck-back prevention box, a plurality of supporting springs are fixedly mounted on the bottom of the lifting sealing seat, a main communication port is formed in the center of the bottom of the lifting sealing seat, a horizontal side communication port is communicated with the top of the main communication port, and an opening corresponding to the side communication port is formed in the side wall of the suck-back prevention box. The utility model discloses a set up the case of preventing suck-back between box and vacuum pump, make the lift seal receptacle rapidly rebound under supporting spring's effect after the outage, make the side intercommunication mouth and the opening switch-on the lift seal receptacle to guarantee the atmospheric pressure rapid increase in the vacuum chamber.
Description
Technical Field
The utility model relates to a drying equipment field specifically is a prevent suck-back vacuum drying oven.
Background
The vacuum drying box is a common instrument in chemical experiments of industrial and mining enterprises, medical institutions and scientific research units, and is mainly used for drying and heating objects under a vacuum condition. The vacuum drying oven is particularly suitable for quickly and efficiently drying heat-sensitive, easily decomposed and easily oxidized substances and complex-component objects.
The existing vacuum drying box basically adopts a mains supply to supply power, if power failure occurs suddenly in the using process, the vacuum pump can stop working immediately, the interior of the drying box is still negative pressure, the suck-back condition occurs in the vacuum pump, the pollution is caused to articles in the drying box, and the working process is influenced. Therefore, it is necessary to design a vacuum drying oven capable of preventing suck-back.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a prevent suck-back vacuum drying oven to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a suck-back prevention vacuum drying oven comprises an oven body, a vacuum pump, a vacuum tube and a suck-back prevention oven; a vacuum tube is communicated in the box body, the other end of the vacuum tube is communicated with a vacuum pump, the box body is vacuumized through the vacuum pump, the vacuum in the vacuum tube is kept, and the vacuum drying in the vacuum tube is realized; a back suction prevention box is communicated with a vacuum tube between the box body and the vacuum pump, the vacuum tube is positioned at the bottom of the back suction prevention box, and gas in the box body passes through the bottom of the back suction prevention box during vacuum pumping; the anti-suck-back box is of a cuboid structure and is vertically arranged, a lifting sealing seat which ascends and descends in the vertical direction is arranged in the anti-suck-back box, the lifting sealing seat is sealed with the inner wall of the anti-suck-back box, the interior of the anti-suck-back box is divided into a lower vacuum cavity and an upper normal pressure cavity, the vacuum cavity is communicated with the vacuum tube and is vacuumized through the vacuum cavity, the normal pressure cavity is the same as the external normal pressure, so that the lifting sealing seat is pressed downwards to enable the lifting sealing seat to move downwards, a plurality of supporting springs are fixedly arranged on the bottom of the lifting sealing seat, the lower ends of the supporting springs are fixedly connected to the bottom of the anti-suck-back box, and the lifting sealing seat is supported through the supporting springs, so that a space of the vacuum cavity is still arranged below the lifting sealing; a main communicating port is formed in the center of the bottom of the lifting sealing seat and communicated with the lower vacuum cavity; the top of the main communicating port is communicated with a horizontal side communicating port which extends towards the left side and the right side of the lifting sealing seat, so that the vacuum cavity can be communicated with the outside, and the pressure in the vacuum cavity is increased; an opening corresponding to the side communication port is formed in the side wall of the suck-back preventing box.
Further: the pressure in the vacuum cavity is reduced, the side communication port is opposite to the opening when the supporting spring supports the lifting sealing seat to move to the highest position, so that the air pressure in the vacuum cavity is rapidly the same as the external normal pressure, the pressure in the vacuum cavity is improved, and the suck-back of the vacuum pump is avoided.
Further: and a circle of sealing ring is fixedly arranged on the outer edge of the side communication port to keep the side communication port sealed.
Further: the outer side of the upper part of the suck-back prevention box is fixedly covered with a dust cover, and the opening is covered in the dust cover.
Further: the filter screen is installed in the embedding on the lateral wall of dust cover, and the outside intercommunication of filter screen reduce the dust and enter into the vacuum chamber through the filter screen to the filtration of entering.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a setting prevents suck-back case between box and vacuum pump, makes the lift seal receptacle rapid rebound under supporting spring's effect after the outage, makes the side intercommunication mouth and the opening switch-on the lift seal receptacle to guarantee the atmospheric pressure rapid increase in the vacuum chamber, block the box in to the suck-back of vacuum pump, make the device safety and stability use.
Drawings
Fig. 1 is a schematic structural view of a suck-back prevention vacuum drying oven.
Fig. 2 is a schematic structural view of a lifting seal seat in a suck-back prevention vacuum drying oven.
Fig. 3 is a schematic structural view of the communication port and the opening in the vacuum drying oven for preventing back suction.
In the figure: the device comprises a box body 1, a vacuum pump 2, a vacuum tube 3, an anti-suck-back box 4, a lifting sealing seat 5, a support spring 6, a main communicating port 7, a side communicating port 8, an opening 9, a vacuum cavity 10, a normal pressure cavity 11, a dust cover 12, a filter screen 13 and a sealing ring 14.
Detailed Description
Example 1
Referring to the drawings, in the embodiment of the present invention, an anti-suck-back vacuum drying oven includes an oven body 1, a vacuum pump 2, a vacuum tube 3 and an anti-suck-back oven 4; the vacuum tube 3 is communicated in the box body 1, the other end of the vacuum tube 3 is communicated with the vacuum pump 2, the vacuum pump 2 is used for vacuumizing the box body 1, the vacuum in the vacuum tube 3 is kept, and the vacuum drying in the vacuum tube 3 is realized.
A back suction prevention box 4 is communicated with a vacuum tube 3 between the box body 1 and the vacuum pump 2, the vacuum tube 3 is positioned at the bottom of the back suction prevention box 4, and gas in the box body passes through the bottom of the back suction prevention box 4 during vacuumizing; the anti-suck-back box 4 is of a cuboid structure and is vertically arranged, a lifting sealing seat 5 which can lift in the vertical direction is arranged in the anti-suck-back box 4, the lifting sealing seat 5 is sealed with the inner wall of the anti-suck-back box 4, a vacuum cavity 10 which is arranged below the anti-suck-back box 4 is separated from an upper normal pressure cavity 11, the vacuum cavity 10 is communicated with the vacuum tube 3, the anti-suck-back box is vacuumized through the vacuum cavity 10, the normal pressure cavity 11 is the same as the external normal pressure, so that the lifting sealing seat 5 is pressed downwards to enable the lifting sealing seat 5 to move downwards, a plurality of supporting springs 6 are fixedly arranged on the bottom of the lifting sealing seat 5, the lower ends of the supporting springs 6 are fixedly connected to the bottom of the anti-suck-back box 4, the lifting sealing seat 5 is supported through the supporting springs 6, and the space of the vacuum cavity 10 is still reserved below the lifting sealing seat 5 after; a main communicating port 7 is formed in the center of the bottom of the lifting sealing seat 5, and the main communicating port 7 is communicated with the inside of a lower vacuum cavity 10; a horizontal side communication port 8 is communicated with the top of the main communication port 7, and the side communication port 8 extends towards the left side and the right side of the lifting sealing seat 5, so that the vacuum cavity 10 can be communicated with the outside, and the pressure in the vacuum cavity 10 can be increased; an opening 9 corresponding to the side communication port 8 is formed in the side wall of the suck-back preventing box 4, and the side communication port 8 is opposite to the opening 9 when the pressure in the vacuum cavity 10 is reduced and the supporting spring 6 supports the lifting sealing seat 5 to move to the highest position, so that the air pressure in the vacuum cavity 10 is rapidly the same as the external normal pressure, the pressure in the vacuum cavity 10 is improved, and the suck-back of the vacuum pump 2 is avoided; a circle of sealing ring 14 is fixedly arranged on the outer edge of the side communication port 8 to keep the side communication port 8 sealed.
Example 2
On the basis of the embodiment 1, the outer side of the upper part of the suck-back prevention box 4 is fixedly covered with a dust cover 12, and the opening 9 is covered in the dust cover 12; the side wall of the dust cover 12 is provided with a filter screen 13 in an embedded mode, the outer side of the filter screen 13 is communicated with the outside, the entering air is filtered through the filter screen 13, and dust entering the vacuum cavity 10 is reduced.
When drying is carried out in the box body 1, if the vacuum pump 2 is suddenly powered off, negative pressure is lost in the vacuum cavity 10 at the moment, the lifting sealing seat 5 is pushed to move upwards under the action of the supporting spring 6, the side communicating port 8 is communicated with the opening 9, and the pressure in the vacuum cavity 10 is increased, so that suck-back in the vacuum pump 2 is avoided, and liquid and the like are prevented from entering the box body 1 through the vacuum tube 3.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A suck-back prevention vacuum drying oven comprises an oven body (1), a vacuum pump (2), a vacuum tube (3) and a suck-back prevention oven (4); a vacuum tube (3) is communicated in the box body (1), and the other end of the vacuum tube (3) is communicated with a vacuum pump (2); the vacuum pump is characterized in that a back suction prevention box (4) is communicated with a vacuum tube (3) between the box body (1) and the vacuum pump (2), and the vacuum tube (3) is positioned at the bottom of the back suction prevention box (4); the anti-suck-back box (4) is of a cuboid structure and is vertically arranged, a lifting sealing seat (5) which can lift in the vertical direction is arranged in the anti-suck-back box (4), a vacuum cavity (10) which is arranged below and a normal pressure cavity (11) which is arranged above are separated in the anti-suck-back box (4), the vacuum cavity (10) is communicated with the vacuum tube (3), a plurality of supporting springs (6) are fixedly arranged on the bottom of the lifting sealing seat (5), and the lower ends of the supporting springs (6) are fixedly connected to the bottom of the anti-suck-back box (4); a main communicating port (7) is formed in the center of the bottom of the lifting sealing seat (5), and the main communicating port (7) is communicated with the inside of a vacuum cavity (10) below the main communicating port; a horizontal side communicating port (8) is communicated with the top of the main communicating port (7), and the side communicating port (8) extends towards the left side and the right side of the lifting sealing seat (5); an opening (9) corresponding to the side communication port (8) is formed in the side wall of the suck-back preventing box (4).
2. The suck-back prevention vacuum drying oven as claimed in claim 1, characterized in that: when the pressure in the vacuum cavity (10) is reduced, the supporting spring (6) supports the lifting sealing seat (5) to move to the highest position, and the side communication port (8) is opposite to the opening (9).
3. The suck-back prevention vacuum drying oven as claimed in claim 1, characterized in that: and a circle of sealing ring (14) is fixedly arranged on the outer edge of the side communication port (8).
4. The suck-back prevention vacuum drying oven as claimed in any one of claims 1 to 3, wherein: the outer side of the upper part of the suck-back prevention box (4) is fixedly covered with a dust cover (12), and the opening (9) is covered in the dust cover (12).
5. The suck-back prevention vacuum drying oven as claimed in claim 4, wherein: and a filter screen (13) is embedded in the side wall of the dust cover (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020090978.2U CN211400528U (en) | 2020-01-16 | 2020-01-16 | Suck-back prevention vacuum drying oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020090978.2U CN211400528U (en) | 2020-01-16 | 2020-01-16 | Suck-back prevention vacuum drying oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211400528U true CN211400528U (en) | 2020-09-01 |
Family
ID=72209295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020090978.2U Active CN211400528U (en) | 2020-01-16 | 2020-01-16 | Suck-back prevention vacuum drying oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211400528U (en) |
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2020
- 2020-01-16 CN CN202020090978.2U patent/CN211400528U/en active Active
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