CN215856290U

CN215856290U - Annular air knife

Info

Publication number: CN215856290U
Application number: CN202121377066.4U
Authority: CN
Inventors: 王兴娜
Original assignee: Zhejiang Jingyuan Photoelectric Technology Co ltd
Current assignee: Zhejiang Jingyuan Photoelectric Technology Co ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-02-18
Anticipated expiration: 2031-06-21

Abstract

The utility model relates to the technical field of air knives, and discloses an annular air knife which comprises an upper shell, a lower shell and an air inlet pipe, wherein the upper shell is provided with a downward opening, the lower shell is hermetically connected with the upper shell, the air inlet pipe is arranged on the outer annular wall of the upper shell, the top wall of the upper shell is integrally extended downwards to form a cone part, a compression cavity communicated with the air inlet pipe is formed between the outer conical surface of the cone part and the inner wall of the upper shell, a conical groove in clearance fit with the outer conical surface of the cone part is concavely arranged on the lower shell, an air passage is formed between the conical groove and the cone part, the tip of the cone part is provided with a first through hole, the tip of the conical groove is provided with a second through hole, an air knife edge communicated with the air passage is formed between the first through hole and the second through hole, and an automatic pressure relief structure is arranged in the compression cavity, this annular air knife reduces annular air knife internal pressure when guaranteeing the stability that the air knife mouth blew out the air current, promotes the security.

Description

Annular air knife

Technical Field

The utility model relates to the technical field of air knives, in particular to an annular air knife.

Background

The photovoltaic solder strip is also called as a tinned copper strip or a tinned copper strip, a branch confluence strip and an interconnector are applied to the connection of photovoltaic module battery pieces, the tinned copper strip takes tin as a coating material, the calendered and annealed copper strip passes through a tin bath containing completely dissolved liquid tin to enable the surface of the copper strip to be covered with tin liquid, then the tin liquid is drawn out, the redundant tin is scraped back into the liquid tin bath through the shaping of an air knife, the residual tin attached to the copper strip is rapidly cooled and solidified immediately after the shaping of the air knife, the tinned copper strip meets the required size standard, but the existing air knife has the defects that the surface of the tinned copper strip is not uniform after the shaping of the air knife due to the fact that the wind power on one side of the tinned copper strip is larger and the wind power on other sides is relatively smaller, the conductivity of the tinned copper strip is poor after the shaping of the air knife, and therefore, an annular air knife appears.

Chinese patent with application number CN202020911035.1 discloses a tinned photovoltaic solder strip ring shape air knife, including last casing and the lower casing that links firmly with last casing seal, lower casing connection has the air-supply line, the casing has central convex part down, the internal compression chamber that centers on central convex part and feed through intake pipe that has of lower casing, the top of central convex part has upwards casing direction extension and inside shrinkage formation cone portion, central convex part has the inner chamber that is located casing bottom surface side opening down, the cone portion tip has the through-hole of switch-on inner chamber, it has the bell jar that matches with the cone portion external conical surface to go up the casing, the bell jar top has the air knife mouth coaxial with the through-hole, form the gas collecting chamber between bell jar lower part and the central convex part, be equipped with the stationary flow piece that can step down the speed reduction to the air inlet between compression chamber and the gas collecting chamber.

This annular air knife of tin-plated photovoltaic solder strip circle is through setting up annular wind edge of a knife, and the wind-force that circumference received when making the photovoltaic solder strip through the through-hole is unanimous, guarantees that the photovoltaic solder strip surface is even, and this annular air knife sets up the steady flow piece in airflow flow channel to this reduces the wind pressure wind speed, but along with the reduction of the air wind pressure wind speed that gets into the gas collection chamber, the air pressure crescent that the air accumulation made the compression intracavity in the compression intracavity, has the potential safety hazard when making annular air knife use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an annular air knife, which ensures the stability of air flow blown out from an air knife opening, limits the maximum bearing pressure of a compression cavity and improves the safety of the compression cavity.

In order to achieve the purpose, the utility model provides the following technical scheme: an annular air knife comprises an upper shell with a downward opening, a lower shell connected with the upper shell in a sealing mode and capable of opening or closing the upper shell, and an air inlet pipe arranged on the outer annular wall of the upper shell and communicated with the interior of the upper shell, wherein a cone portion extends downwards and integrally from the top wall of the upper shell, a compression cavity communicated with the air inlet pipe is formed between the outer conical surface of the cone portion and the inner wall of the upper shell, a conical groove in clearance fit with the outer conical surface of the cone portion is concavely arranged on the lower shell, an air passing channel is formed between the conical groove and the outer conical surface of the cone portion, a first through hole communicated with the upper end face of the upper shell is coaxially arranged at the tip of the cone portion and the cone portion, a second through hole communicated with the lower end face of the lower shell is coaxially arranged at the tip of the conical groove and the first through hole, an air knife edge communicated with the air passing channel is formed between the first through hole and the second through hole, and an air discharging is arranged in the compression cavity when the air pressure in the compression cavity is higher than a preset value or stopping when the pressure in the compression cavity is lower than the preset value Automatic pressure relief structure of exhaust.

By adopting the scheme, compared with the prior art that air pressure in the compression cavity is gradually increased as the air pressure and the air speed of air entering the gas collection cavity are reduced, and potential safety hazards exist when the annular air knife is used, the scheme is that the photovoltaic welding strip passes through the second through hole and the first through hole, air flow enters the compression cavity through the air inlet pipe, and then is accelerated through the air channel to form the air knife to shape the photovoltaic welding strip, the automatic pressure relief structure is additionally arranged, the air pressure in the compression cavity can be automatically adjusted according to the change of the air pressure in the compression cavity to be lower than a preset value, the use safety of the annular air knife is ensured, when the air pressure in the compression cavity is higher than the preset value, the air pressure in the compression cavity is discharged through the automatic pressure relief structure, so that the air pressure in the compression cavity is reduced, when the air pressure in the compression cavity is reduced to be lower than the preset value, the automatic air discharge and pressure relief device stops discharging, and ensures that the air pressure in the compression cavity is always under the preset pressure, thereby defining the maximum pressure of the air knife.

Furthermore, the automatic pressure relief structure comprises a yielding groove formed in the inner wall of the compression cavity, an exhaust pipe formed in the side wall of the yielding groove and communicated with the outer portion of the upper shell or the outer portion of the lower shell, a sealing element which slides in the yielding groove in a sealing mode and can open or close the exhaust pipe, and a spring arranged between the sealing element and the yielding groove, wherein the exhaust pipe is closed when the spring is in an initial state.

By adopting the scheme, when the air pressure inside the compression cavity is greater than the preset value, the sealing element slides under the action of the air pressure to enable the exhaust pipe to be communicated with the compression cavity, air is exhausted from the compression cavity through the air exhaust pipe through the abdicating groove, and after the air pressure in the compression cavity is reduced to be lower than the preset value, the exhaust pipe is blocked by the sealing element under the action of the spring force.

Furthermore, the automatic pressure relief structure is provided with at least one group in the compression cavity at uniform intervals.

By adopting the scheme, a set of automatic adjustment capable of realizing the pressure in the compression cavity is arranged, and a plurality of sets of speeds capable of improving the pressure adjustment are arranged, so that the air pressure in the compression cavity is fast and stable, and the stability of the air flow blown out from the air knife edge is further improved.

Furthermore, one end of the exhaust pipe, which is far away from the compression cavity, is provided with a protection structure, and the protection structure comprises an air bag which is detachably arranged on the exhaust pipe and is communicated with the exhaust pipe.

Adopt above-mentioned scheme, because the atmospheric pressure in the compression intracavity is higher, through the exhaust pipe combustion gas velocity of flow great, it is can make operating personnel on every side be injured if direct emission, consequently set up the gasbag and can make exhaust air temporarily store in the gasbag, and operating personnel can judge the atmospheric pressure in the compression intracavity according to the gasbag change, if the gasbag lasts the increase, then explain the atmospheric pressure in the compression intracavity too big, need adjust the gas flow that intake pipe department got into the compression chamber this moment, guarantee the security, if gasbag intermittent type nature increase, then explain the inside atmospheric pressure in compression chamber and carrying out automatically regulated, the air knife mouth blows off the air current and is in steady state, only need dismantle the gasbag of grow this moment and install the installation after the gassing and reset.

Furthermore, a detachable structure is arranged between the air bag and the exhaust pipe, and the detachable structure comprises a connecting pipe which is fixedly and hermetically arranged at the opening of the air bag and is in interference fit with the exhaust pipe after being inserted into the exhaust pipe.

By adopting the scheme, the connecting pipe is pulled out from the exhaust pipe by external force, the connecting pipe is inserted into the exhaust pipe after the air bag is deflated, the sealing is realized by the interference fit of the connecting pipe and the exhaust pipe, and air enters the air bag from the compression cavity through the abdicating groove and the exhaust pipe during automatic pressure relief.

Furthermore, the upper end surface of the upper shell is provided with a conical groove which is coaxial with the first through hole in a downward concave mode.

Adopt above-mentioned scheme, waste material or the greasy dirt that the air knife mouth produced after the work probably adhere on the inner wall of first through-hole, because first through-hole diameter is less, can lead to being difficult to clean if the length overlength, can lead to blockking up for a long time, the length of first through-hole has been shortened greatly to the toper recess, the cleanness of being convenient for, increase of service life.

Furthermore, two air inlet pipes are symmetrically arranged on the outer annular wall of the upper shell.

By adopting the scheme, two air flows which can enter the compression cavity from the air inlet pipe are symmetrically arranged, so that the stability of the air flow at the air knife edge is further improved.

Compared with the prior art, the utility model has the following beneficial effects:

1. the automatic pressure relief structure is additionally arranged, so that the air pressure in the compression cavity can be automatically adjusted to be lower than a preset value according to the change of the air pressure in the compression cavity, the use safety of the annular air knife is ensured, and the automatic pressure relief structure ensures that the air pressure in the compression cavity is always in a stable state, so that the stability of air flow blown out from an air knife opening is ensured.

2. Add protective structure, when avoiding operating personnel injured, still can judge the atmospheric pressure of compression intracavity according to the gasbag change to carry out follow-up regulation, through 2 above-mentioned advantages, reduce annular air knife internal pressure when guaranteeing the air current is blown out to the wind edge of a knife, promote the security.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is an isometric view of an annular air knife of example 1;

FIG. 2 is a plan view of an annular air knife in embodiment 1;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is a schematic half-sectional view of an annular air knife in example 2.

In the figure: 1. an upper housing; 2. a lower housing; 3. an air inlet pipe; 4. a cone portion; 5. a compression chamber; 6. a tapered groove; 7. a gas passage; 8. a first through hole; 9. a second through hole; 10. a wind blade edge; 11. a yielding groove; 12. an exhaust duct; 13. a seal member; 14. a spring; 15. an air bag; 16. a connecting pipe; 17. a tapered recess.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

An annular air knife, referring to fig. 1 to 4, comprises an upper shell 1 with a downward opening, a lower shell 2 connected with the upper shell 1 in a sealing way and capable of opening or closing the upper shell 1, an air inlet pipe 3 communicated with the inside of the upper shell 1 is arranged on the outer annular wall of the upper shell 1, a cone part 4 is arranged on the top wall of the upper shell 1 and extends downwards integrally, a compression cavity 5 communicated with the air inlet pipe 3 is formed between the outer conical surface of the cone part 4 and the inner wall of the upper shell 1, a conical groove 6 in clearance fit with the outer conical surface of the cone part 4 is concavely arranged on the lower shell 2, an air passage 7 is formed between the conical groove 6 and the outer conical surface of the cone part 4, a first through hole 8 communicated with the upper end surface of the upper shell 1 is coaxially arranged at the tip of the cone part 4 and the cone part 4, a second through hole 9 communicated with the lower end surface of the lower shell 2 is coaxially arranged at the tip of the conical groove 6 and the first through hole 8, an air knife opening 10 communicated with the air passing channel 7 is formed between the first through hole 8 and the second through hole 9, an automatic pressure relief structure for exhausting and relieving pressure when the air pressure in the compression cavity 5 is higher than a preset value (the preset value is the air pressure in the compression cavity 5 when the air speed of the air knife reaches the preset value, at the moment, a sealing element 13 just blocks an exhaust pipe 12 under the action of the air pressure and the elasticity of a spring 14) or stopping exhausting when the air pressure in the compression cavity 5 is lower than the preset value is arranged in the compression cavity 5, the automatic pressure relief structure comprises a abdicating groove 11 arranged on the inner wall of the compression cavity 5, an exhaust pipe 12 arranged on the side wall of the abdicating groove 11 and communicated with the outside of the upper shell 1 or the lower shell 2, a sealing element 13 capable of opening or closing the exhaust pipe 12 and a spring 14 arranged between the sealing element 13 and the abdicating groove 11, at least one group of the automatic pressure relief structure is uniformly arranged in the compression cavity 5 at intervals, in this embodiment, a set of air inlet pipes is provided, the upper end surface of the upper casing 1 is provided with a conical groove 17 which is recessed downward and is coaxial with the first through hole 8, and two air inlet pipes 3 are symmetrically provided on the outer circumferential wall of the upper casing 1.

The photovoltaic solder strip passes through the first through hole 8 and the second through hole 9, the airflow enters the compression cavity 5 through the air inlet pipe 3, the space between the air passage 7 is greatly reduced, the air speed is greatly increased after the airflow passes through the air passage 7, an air knife is formed to shape the surface of the photovoltaic solder strip through being scraped out by the air knife opening 10, due to the large narrowing of the air passage 7, air accumulates in the compression chamber 5 to increase the air pressure inside the compression chamber 5, when the air pressure in the compression cavity 5 is larger than the preset value, the sealing element 13 slides under the action of the air pressure to enable the exhaust pipe 12 to be communicated with the compression cavity 5, the air is exhausted from the compression cavity 5 through the air exhaust pipe 12 through the abdicating groove 11, after the air pressure in the compression cavity 5 is reduced to be lower than the preset value, the sealing element 13 blocks the exhaust pipe 12 again under the action of the elastic force of the spring 14, the exhaust stops, and the air pressure in the compression cavity 5 is always in a stable state, so that the stability of the air flow blown out from the air knife opening 10 is ensured.

Example 2

In this embodiment, compared with embodiment 1, the difference is that, referring to fig. 5, a protection structure is disposed at an end of the exhaust pipe 12 away from the compression cavity 5, the protection structure includes an air bag 15 detachably disposed on the exhaust pipe 12 and communicated with the exhaust pipe 12, a detachable structure is disposed between the air bag 15 and the exhaust pipe 12, and the detachable structure includes a connecting pipe 16 fixedly disposed at an opening of the air bag 15 and hermetically inserted into the exhaust pipe 12 and then in interference fit with the exhaust pipe 12.

Because the air pressure in the compression cavity 5 is high, the air flow speed discharged through the exhaust pipe 12 is high, if the air is directly discharged, surrounding operators can be injured, the air bag 15 is arranged, the discharged air can be temporarily stored in the air bag 15, the operators can judge the air pressure in the compression cavity 5 according to the change of the air bag 15, if the air bag 15 is continuously increased, the air pressure in the compression cavity 5 is over high, the air flow entering the compression cavity 5 from the air inlet pipe 3 needs to be adjusted, the safety is ensured, if the air bag 15 is increased intermittently, the air pressure in the compression cavity 5 is automatically adjusted, the air flow blown out by the air knife edge 10 is in a stable state, and at the moment, the air bag 15 which is enlarged only needs to be detached and is installed and reset after being deflated.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an annular air knife, including last casing (1) that the opening set up downwards, with last casing (1) sealing connection can open or close the lower casing (2) of last casing (1) and set up on the outer rampart of last casing (1) with air-supply line (3) of the inside intercommunication of last casing (1), its characterized in that: the top wall of the upper shell (1) extends downwards to form a cone part (4), a compression cavity (5) communicated with the air inlet pipe (3) is formed between the outer conical surface of the cone part (4) and the inner wall of the upper shell (1), a conical groove (6) in clearance fit with the outer conical surface of the cone part (4) is concavely arranged on the lower shell (2), an air passing channel (7) is formed between the conical groove (6) and the outer conical surface of the cone part (4), a first through hole (8) communicated with the upper end face of the upper shell (1) is coaxially arranged at the tip of the cone part (4) and the cone part (4), a second through hole (9) communicated with the lower end face of the lower shell (2) is coaxially arranged at the tip of the conical groove (6) and the first through hole (8), an air knife edge (10) communicated with the air passing channel (7) is formed between the first through hole (8) and the second through hole (9), and exhaust and pressure relief or exhaust pressure relief or air passing when the pressure in the compression cavity (5) is higher than a preset value is formed in the compression cavity (5) is arranged in the compression cavity (5) ) The automatic pressure relief structure stops exhausting when the internal air pressure is lower than a preset value.

2. The annular air knife of claim 1, wherein: the automatic pressure relief structure comprises a yielding groove (11) formed in the inner wall of the compression cavity (5), an exhaust pipe (12) formed in the side wall of the yielding groove (11) and communicated with the outside of the upper shell (1) or the lower shell (2), a sealing element (13) which can open or close the exhaust pipe (12) and is arranged in the yielding groove (11) in a sealing sliding mode, and a spring (14) arranged between the sealing element (13) and the yielding groove (11), wherein the exhaust pipe (12) is closed when the spring (14) is in an initial state.

3. The annular air knife of claim 2, wherein: the automatic pressure relief structure is provided with at least one group in the compression cavity (5) at uniform intervals.

4. The annular air knife of claim 1, wherein: one end of the exhaust pipe (12) far away from the compression cavity (5) is provided with a protection structure, and the protection structure comprises an air bag (15) which is detachably arranged on the exhaust pipe (12) and is communicated with the exhaust pipe (12).

5. The annular air knife of claim 4, wherein: a detachable structure is arranged between the air bag (15) and the exhaust pipe (12), and the detachable structure comprises a connecting pipe (16) which is fixedly and hermetically arranged at the opening of the air bag (15), inserted into the exhaust pipe (12) and then in interference fit with the exhaust pipe (12).

6. The annular air knife of claim 1, wherein: the upper end surface of the upper shell (1) is provided with a conical groove (17) which is coaxial with the first through hole (8) in a downward concave mode.

7. The annular air knife of claim 1, wherein: two air inlet pipes (3) are symmetrically arranged on the outer annular wall of the upper shell (1).