CN215041155U - Offset printing on-line low-pressure air knife - Google Patents
Offset printing on-line low-pressure air knife Download PDFInfo
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- CN215041155U CN215041155U CN202121192320.3U CN202121192320U CN215041155U CN 215041155 U CN215041155 U CN 215041155U CN 202121192320 U CN202121192320 U CN 202121192320U CN 215041155 U CN215041155 U CN 215041155U
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Abstract
The utility model relates to an offset printing online low-pressure air knife, which comprises an upper layer structure and a lower layer structure; the upper layer structure is provided with a primary pressure equalizing space, and the lower layer structure is provided with a secondary pressure equalizing space; a pressure equalizing plate is arranged between the primary pressure equalizing space and the secondary pressure equalizing space; the pressure equalizing plate is provided with a throttling hole, and a flow blocking plate is arranged above the pressure equalizing plate; excessive and uneven-pressure airflow generated by the air pressure source is retained in the main pressure-equalizing space to perform primary airflow pressure equalization, then enters the secondary pressure-equalizing space from the throttling hole of the pressure-equalizing plate through the spoiler, and is retained in the secondary pressure-equalizing space to perform secondary airflow pressure equalization and then is blown out from the air knife edge. The utility model utilizes the change adjustment of the area of the gas flow path to lead the excessive and uneven-pressure gas flow to be successively retained in the primary and secondary pressure-equalizing spaces to reach a balanced gas pressure and then output; the phenomenon that the air curtain pressure is uneven easily generated under the condition of low pressure of the whole length of the air knife is solved; the cost of setting, operating and maintaining the air supply equipment is reduced.
Description
Technical Field
The utility model belongs to the technical field of offset printing on-line measuring technique and specifically relates to an online low pressure type air knife of offset printing.
Background
The common air knife adopts compressed air as an air pressure source, the air knife gap (namely the knife edge width) is generally not more than 0.1mm, the use pressure is generally about 0.5MPa, and the air pressure blown out by the air knife in the full length is average under higher pressure.
If the fan is used as an air pressure source, because the characteristics of the fan are that the air pressure is low (about 0.01-0.03 MPa), the air volume is large, and the air pressure is completely opposite to the high air pressure and the low flow of compressed air, a common air knife cannot be adopted, the ink just printed is gelatinized by the over-high air flow, the ink can be used only after being reduced in pressure, and the low-pressure air knife is not common.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the utility model provides an online low pressure type air knife of offset printing, solved offset printing on-line measuring system and adopted the fan to blow the problem of exhibition flat when adopting the air supply unable air knife.
The utility model provides a technical scheme that its technical problem adopted is: an offset printing online low-pressure air knife comprises an upper layer structure and a lower layer structure; the upper layer structure is provided with a primary pressure equalizing space, and the lower layer structure is provided with a secondary pressure equalizing space; a pressure equalizing plate is arranged between the primary pressure equalizing space and the secondary pressure equalizing space; the pressure equalizing plate is provided with a throttling hole, and a flow blocking plate is arranged above the pressure equalizing plate; excessive and uneven-pressure airflow generated by the air pressure source is retained in the main pressure-equalizing space to perform primary airflow pressure equalization, then enters the secondary pressure-equalizing space from the throttling hole of the pressure-equalizing plate through the spoiler, and is retained in the secondary pressure-equalizing space to perform secondary airflow pressure equalization and then is blown out from the air knife edge.
Furthermore, the upper layer structure of the utility model also comprises an airflow channel, and two ends of the airflow channel are connected with an air pressure source; the air flow channel is internally provided with an air flow guide plate, and the main pressure equalizing space is arranged between the air flow channel and the pressure equalizing plate.
Further, the inferior pressure-equalizing space of the utility model is arranged between the air knife edge and the pressure-equalizing plate.
Furthermore, the air pressure source of the present invention is a fan, an air pump or an air compressor.
Furthermore, the clearance of the air knife edge of the air knife of the utility model is 0.5 mm-2.5 mm.
Furthermore, the airflow channel of the utility model is connected with an air pressure source through an air inlet pipe; the air inlet pipe extends horizontally or vertically to enter air.
Furthermore, the arrangement mode of the throttling holes of the utility model is single row arrangement.
The utility model has the advantages that the defects in the background technology are solved, and the excessive air flow with uneven pressure is successively retained in the primary and secondary pressure-equalizing spaces to achieve a balanced air pressure and then output by utilizing the change adjustment of the air flow path area; the phenomenon that the air curtain pressure is uneven easily generated under the condition of low pressure of the whole length of the air knife is solved; the cost of setting, operating and maintaining the air supply equipment is reduced.
Drawings
Fig. 1-3 are schematic structural views of the present invention;
in the figure: 1. an upper layer structure; 2. a lower layer structure; 3. a pressure equalizing plate; 4. an air flow channel; 5. an airflow guide plate; 6. a primary pressure-equalizing space; 7. a secondary pressure-equalizing space; 8. an air knife edge; 9. entering an air pipe; 10. an orifice; 11. a spoiler.
Detailed Description
The invention will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
An offset printing on-line low pressure type air knife as shown in fig. 1-3 comprises an upper layer structure 1 and a lower layer structure 2; the upper layer structure 1 and the lower layer structure 2 are both of cavity structures; the superstructure 1 has a primary pressure equalizing space 6 and the substructure 2 has a secondary pressure equalizing space 7.
A pressure equalizing plate 3 is arranged between the primary pressure equalizing space 6 and the secondary pressure equalizing space 7; the pressure equalizing plate 3 is provided with a throttling hole 10, and a spoiler 11 is arranged above the pressure equalizing plate 3; excessive and uneven-pressure airflow generated by the air pressure source is retained in the main pressure-equalizing space to perform primary airflow pressure equalization, then enters the secondary pressure-equalizing space from the throttling hole of the pressure-equalizing plate through the spoiler, and is retained in the secondary pressure-equalizing space to perform secondary airflow pressure equalization and then is blown out from the air knife edge.
The upper layer structure 1 comprises an airflow channel 4, and two ends of the airflow channel 4 are connected with an air pressure source through an air inlet pipe 9; the air inlet pipe extends horizontally or vertically. An airflow guide plate 5 is arranged in the airflow channel 4, the airflow channel 4 is provided with an opening, and a main pressure equalizing space 6 is arranged between the airflow channel 4 and the pressure equalizing plate 3; the excessive and uneven-pressure airflow generated by the air pressure source is introduced from the airflow channel, enters the main pressure equalizing space from the open hole through the airflow guide plate, and is retained in the main pressure equalizing space to perform primary airflow pressure equalization.
The lower layer structure 2 comprises an air knife edge 8, and the gap of the air knife edge 8 is 0.5-2.5 mm; a secondary pressure equalizing space 7 is arranged between the air knife edge 8 and the pressure equalizing plate 3; the air flow which is subjected to primary air flow pressure equalization in the primary pressure equalization space 6 enters the secondary pressure equalization space 7 through the guide plate and the pressure equalization plate, is retained in the secondary pressure equalization space 7, is subjected to secondary air flow pressure equalization, and is blown out from the air knife edge 8.
The utility model utilizes the change adjustment of the internal gas flow path area of the air knife to lead the excessive and uneven-pressure gas flow to be successively retained in the primary pressure-equalizing space and the secondary pressure-equalizing space, and the excessive and uneven-pressure gas flow is blown out from the air knife air port after reaching a balanced gas pressure, thereby solving the problem that the air curtain pressure is uneven under the condition of low pressure at the whole length of the air knife; the direction of the arrows in fig. 1-2 is the direction of the gas flow.
The air pressure source can be a fan, compressed air or the like; the hole diameter and the distance of the throttling holes of the pressure equalizing plate are calculated and verified, the throttling holes are arranged in a single row, and the throttling holes are circular or in other shapes. When the fan is used as an air pressure source, the air pressure of the fan is much smaller than the air pressure of compressed air, so that the opening degree of the air knife edge is properly increased when the fan is used compared with the gap of the air knife edge when the compressed air is used, so that similar wind power is obtained, and sufficient wind power output is ensured.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (7)
1. The utility model provides an online low pressure type air knife of offset printing which characterized in that: comprises an upper layer structure and a lower layer structure; the upper layer structure is provided with a primary pressure equalizing space, and the lower layer structure is provided with a secondary pressure equalizing space; a pressure equalizing plate is arranged between the primary pressure equalizing space and the secondary pressure equalizing space; the pressure equalizing plate is provided with a throttling hole, and a flow blocking plate is arranged above the pressure equalizing plate; excessive and uneven-pressure airflow generated by the air pressure source is retained in the main pressure-equalizing space to perform primary airflow pressure equalization, then enters the secondary pressure-equalizing space from the throttling hole of the pressure-equalizing plate through the spoiler, and is retained in the secondary pressure-equalizing space to perform secondary airflow pressure equalization and then is blown out from the air knife edge.
2. The offset printing in-line low pressure type air knife according to claim 1, wherein: the upper layer structure also comprises an airflow channel, and two ends of the airflow channel are connected with an air pressure source; the air flow channel is internally provided with an air flow guide plate, and the main pressure equalizing space is arranged between the air flow channel and the pressure equalizing plate.
3. The offset printing in-line low pressure type air knife according to claim 1, wherein: the secondary pressure equalizing space is arranged between the air knife edge and the pressure equalizing plate.
4. The offset printing in-line low pressure type air knife according to claim 1, wherein: the air pressure source is a fan, an air pump or an air compressor.
5. The offset printing in-line low pressure type air knife according to claim 1, wherein: the gap between the edges of the air knives is 0.5 mm-2.5 mm.
6. The offset printing in-line low pressure type air knife according to claim 2, wherein: the air flow channel is connected with an air pressure source through an air inlet pipe; the air inlet pipe extends horizontally or vertically to enter air.
7. The offset printing in-line low pressure type air knife according to claim 1, wherein: the arrangement mode of the throttling holes is single-row arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121192320.3U CN215041155U (en) | 2021-05-31 | 2021-05-31 | Offset printing on-line low-pressure air knife |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121192320.3U CN215041155U (en) | 2021-05-31 | 2021-05-31 | Offset printing on-line low-pressure air knife |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215041155U true CN215041155U (en) | 2021-12-07 |
Family
ID=79209346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121192320.3U Active CN215041155U (en) | 2021-05-31 | 2021-05-31 | Offset printing on-line low-pressure air knife |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215041155U (en) |
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2021
- 2021-05-31 CN CN202121192320.3U patent/CN215041155U/en active Active
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