A non-contact air knife

Abstract

This invention relates to a non-contact air knife, belonging to the technical field of dust removal equipment. The invention includes an air knife housing, within which are relatively independent blowing and suction chambers. The air knife housing has a blowing chamber inlet and an air chamber outlet communicating with the blowing chamber. The blowing chamber inlet is for receiving compressed gas, and the blowing chamber outlet is for expelling the compressed gas to the product surface to remove dust. The air knife housing also has a suction chamber inlet and a suction chamber outlet communicating with the suction chamber. The suction chamber outlet is connected to the inlet of a negative pressure suction device, allowing external gas and dust to be drawn into the suction chamber through the suction chamber inlet and discharged through the suction chamber outlet. The air knife housing includes a first housing and a second housing. The second housing is located inside the first housing, and its inner cavity forms the blowing chamber. The space between the first and second housings forms a suction chamber surrounding the outer side of the blowing chamber.

Description

Technical Field

[0001] This invention relates to the field of dust removal equipment technology, and in particular to a non-contact air knife. Background Technology

[0002] During product processing, it is often necessary to remove dust from the product surface. The common method of dust removal is to use air blowing equipment to blow away the dust on the product surface. Air knives are commonly used air blowing equipment in the industry, which have functions such as water removal, dust removal, cleaning, and drying. They are widely used in the automotive, electronics, chemical, printing, metal, rubber and plastics, food and pharmaceutical industries.

[0003] However, existing air knives have limited functionality, typically only providing air blowing. For example, the high-speed tinning machine uniform air-blowing air knife disclosed in patent CN202558920U includes an air-blowing air knife body and an inert gas connecting pipe, as well as a honeycomb-shaped baffle set in the air cavity of the air knife body. In this patent, the inert gas can be evenly blown onto the copper strip after tinning through the honeycomb-shaped baffle, solving the problem of uneven air blowing in traditional air-blowing air knives, which leads to uneven tinning of the copper strip and affects product quality. However, the air knife provided by this patent only blows away dust from the product, and the blown dust floats in the air and disperses, adversely affecting the working environment. Summary of the Invention

[0004] This invention provides a non-contact air knife to solve the technical problem that existing air knives remove dust from products by blowing air, which causes dust to float and has an adverse impact on the working environment.

[0005] To solve the above problems, the present invention provides a non-contact air knife with the following technical solution:

[0006] A non-contact air knife, comprising:

[0007] The air knife housing has relatively independent blowing chamber and suction chamber.

[0008] The air knife housing is provided with an air chamber inlet and an air chamber outlet that communicate with the air chamber. The air chamber inlet is used to allow compressed gas to enter, and the air chamber outlet is used to allow the compressed gas to be blown out to the product surface to blow up the dust on the product surface.

[0009] The air knife housing is provided with an air chamber inlet and an air chamber outlet that communicate with the air chamber. The air chamber outlet is used to connect with the inlet of the negative pressure air suction device so that external gas and dust are drawn into the air chamber through the air chamber inlet and discharged from the air chamber outlet.

[0010] The beneficial effects of the above technical solution are as follows: the air knife housing has a blowing chamber and a suction chamber. After blowing air from the outlet of the blowing chamber toward the product surface, the dust on the product surface can be blown up. Then, the dust is sucked into the suction chamber through the inlet of the suction chamber and discharged. Compared with the prior art, which only removes dust from the product surface by blowing air, it can avoid dust from escaping into the air and causing pollution to the production environment, and avoid dust from being blown onto the surface of other equipment and causing adverse effects on other equipment.

[0011] Furthermore, the air knife housing includes a first housing and a second housing, the second housing is located inside the first housing, the inner cavity of the second housing forms the blowing chamber, and the space between the first housing and the second housing forms the suction chamber surrounding the outer side of the blowing chamber.

[0012] The beneficial effects of the above technical solution are: the second housing is located inside the first housing, which reduces the space occupied by the air knife compared to setting the first housing and the second housing separately, making the air knife structure more compact.

[0013] Furthermore, the bottom of the first housing is provided with a first strip-shaped channel communicating with the suction chamber. There is a gap between the two inner sidewalls of the first strip-shaped channel and the second housing, and the gaps at these two locations form two suction chamber inlets.

[0014] The bottom of the second housing is provided with a second strip-shaped channel, the projection of the second strip-shaped channel on the first strip-shaped channel is located inside the first strip-shaped channel, and the second strip-shaped channel forms the outlet of the blowing chamber;

[0015] The top of the first housing is provided with a first through hole communicating with the suction chamber, and the first through hole forms the inlet of the suction chamber. The top of the second housing is provided with a second through hole communicating with the blowing chamber. The top of the first housing is provided with a through hole coaxial with the second through hole, and the through hole and the second through hole form the inlet of the blowing chamber.

[0016] The beneficial effects of the above technical solution are as follows: a first strip channel is set up so that the inner side wall of the first strip channel and the outer side wall of the corresponding second shell form an air suction chamber inlet, and a second strip channel is set up to form an air blowing chamber outlet, so that there is an air suction chamber inlet on each side of the air blowing chamber outlet. When the air blown out from the air blowing chamber outlet blows up the dust on the product surface, the air suction chamber inlets on both sides can suck up the blown dust, resulting in a better dust removal effect.

[0017] Furthermore, the second housing includes two side baffles, which are located on both sides of the second strip channel and on the inner side of the first strip channel. A gap is provided between the bottom end of the side baffle and the inner wall of the corresponding first strip channel to form the air intake chamber inlet.

[0018] Furthermore, the bottom end of the side baffle extends to be flush with the bottom surface of the first housing.

[0019] The beneficial effect of the above technical solution is that it makes the inlet size of the suction chamber narrower, preventing most of the gas discharged from the outlet of the blowing chamber from entering the suction chamber through the inlet and making it difficult to blow to the product surface.

[0020] Furthermore, an exhaust nozzle is connected to the bottom of the second housing, and the exhaust nozzle has an exhaust channel that communicates with the second strip channel.

[0021] The beneficial effects of the above technical solution are: setting exhaust nozzles can pressurize and process the air blown out of the blower chamber outlet, changing the state of the air blown out of the blower chamber outlet, so that the air outlet state is more in line with the working conditions.

[0022] Furthermore, the exhaust nozzle includes two nozzle components, which are located on both sides of the second strip channel, with a gap between them. A groove is provided on the side of the two nozzle components that are close to each other, and the space between the two nozzle components forms the exhaust channel.

[0023] Furthermore, the cross-section of the groove is a right-angled triangle, and the grooves on the two nozzle components form an inverted cone-shaped exhaust vent.

[0024] The beneficial effects of the above technical solution are: setting an inverted cone-shaped exhaust vent can compress the gas blown out of the blower chamber outlet, increase the exhaust pressure, and make the exhaust air more concentrated.

[0025] Furthermore, the nozzle assembly is provided with an adjusting elongated hole, the length direction of which is perpendicular to the length direction of the second strip channel. The second housing is provided with threaded holes on both sides of the second strip channel. The connecting bolt passes through the adjusting elongated hole and is threadedly connected to the corresponding threaded hole to connect the nozzle assembly to the second housing.

[0026] The beneficial effects of the above technical solution are: by opening an adjustment elongated hole on the nozzle assembly, the installation position of the nozzle assembly can be adjusted, thereby adjusting the distance between the two nozzle assemblies, thus making the air volume adjustable.

[0027] Furthermore, a mounting bracket is connected to the air knife housing, which is used for mounting and connecting the electrostatic processor.

[0028] The beneficial effects of the above technical solution are: by connecting and mounting brackets on the air knife housing, an electrostatic processor can be installed on the non-contact air knife, thereby removing the static electricity between dust and the product before dust removal, making it easier for dust to detach from the product. Attached Figure Description

[0029] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the invention are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0030] Figure 1 A schematic diagram of the structure of a non-contact air knife provided by the present invention. Figure 1 ;

[0031] Figure 2 A schematic diagram of the structure of a non-contact air knife provided by the present invention. Figure 2 ;

[0032] Figure 3 A schematic diagram of the structure of a non-contact air knife provided by the present invention. Figure 3 ;

[0033] Figure 4 A schematic diagram of the structure of a non-contact air knife provided by the present invention. Figure 4 ;

[0034] Figure 5 A schematic diagram of the structure of a non-contact air knife provided by the present invention. Figure 5 ;

[0035] Figure 6 A schematic diagram of the structure of one type of exhaust nozzle in a non-contact air knife provided by the present invention;

[0036] Figure 7 This is a schematic diagram of another exhaust nozzle in a non-contact air knife provided by the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. First top plate; 2. Vertical side plate; 3. Bottom inclined plate; 4. Connecting block; 5. Arc plate; 6. Inclined side plate; 601. Threaded hole; 7. Side baffle; 8. Nozzle assembly; 801. Oblong hole; 9. Connecting bolt; 10. Blowing chamber; 11. Suction chamber; 12. Blowing chamber outlet; 13. Suction chamber inlet; 14. Second top plate; 15. Suction chamber outlet; 16. Blowing chamber inlet; 17. Exhaust duct; 18. Exhaust duct connector; 19. Inlet duct connector. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] The following is one embodiment of a non-contact air knife provided by the present invention:

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, a non-contact air knife includes an air knife housing, which comprises a first housing and a second housing. The first housing is in the shape of a square tube. The length direction of the first housing is defined as the front-to-back direction. The first housing includes a first top plate 1, two vertical side plates 2, and two bottom inclined plates 3. The width direction of the first top plate 1 is defined as the left-to-right direction. The two vertical side plates 2 are vertically connected to the left and right ends of the first top plate 1, respectively. The two bottom inclined plates 3 are connected to the bottom ends of the two vertical side plates 2 and located between them. The two bottom inclined plates 3 approach each other from bottom to top, and a gap is provided between them, forming a first strip-shaped channel.

[0042] The second housing is located within the cavity of the first housing. The second housing includes a second top plate 14, two arc-shaped plates 5, and two inclined side plates 6. The two arc-shaped plates 5 are respectively connected to the left and right ends of the first top plate 1, with their arc-shaped openings facing each other. The two inclined side plates 6 are respectively connected to the bottom ends of the two arc-shaped plates 5, and are close to each other from top to bottom. The inner wall of the second top plate 14 is tangent to the inner walls of the two arc-shaped plates 5, and the inner walls of the two inclined side plates 6 are also tangent to the inner walls of the two arc-shaped plates 5. A gap is provided between the bottom ends of the two inclined side plates 6 to form a second strip-shaped channel, which forms the air-blowing chamber outlet 12 on the second housing. The width of the second strip-shaped channel is smaller than the width of the first strip-shaped channel, and the second strip-shaped channel is located directly above the middle position of the first strip-shaped channel. A connecting block 4 connects the first top plate 1 and the second top plate 14 to connect the first housing and the second housing into a single unit. The inner cavity of the second housing forms a blowing chamber 10, and the space between the inner side wall of the first housing and the outer side wall of the second housing forms a suction chamber 11.

[0043] The aforementioned inclined side plate 6 has a horizontal bottom mounting surface. A side baffle 7 is vertically connected to the side of the bottom mounting surface opposite to the second strip-shaped channel. The bottom end of the side baffle 7 extends to the bottom surface of the bottom inclined plate 3. A gap is provided between the side baffle 7 and the bottom inclined plate 3, which forms the suction chamber inlet 13. There is a suction chamber inlet 13 on each side of the blowing chamber outlet 12. Here, because the width of the suction chamber inlet 13 is relatively narrow, the gas entering the suction chamber 11 from the suction chamber inlet 13 will encounter a certain resistance. Therefore, the gas blown out from the blowing chamber outlet 12 can be smoothly blown to the product surface, and will not be completely sucked into the suction chamber 11 through the suction chamber inlet 13, ensuring that the non-contact air knife can achieve dust removal.

[0044] An installation space is formed between the two side baffles 7 and the two bottom mounting surfaces for installing exhaust nozzles. Each exhaust nozzle includes two nozzle assemblies 8, both elongated in shape. Each nozzle assembly 8 has an adjusting elongated hole 801 extending laterally and penetrating vertically. Correspondingly, the two inclined side plates 6 have threaded holes 601 extending vertically. A connecting bolt 9 passes through the adjusting elongated hole 801 on the nozzle assembly 8 and is threaded into the threaded hole 601 to fix the nozzle assembly 8 to the inclined side plate 6. A gap exists between the two nozzle assemblies 8; the gap can be adjusted by adjusting the position of the connecting bolt 9 within the adjusting elongated hole 801 on the nozzle assembly.

[0045] Exhaust nozzles are available in various models, such as compression exhaust nozzles and agitation exhaust nozzles, such as... Figure 6 As shown, the two nozzle components 8 in the compression exhaust nozzle have grooves with right-angled triangular cross-sections on their adjacent sides, forming an inverted conical exhaust port 17 after assembly. This compresses and pressurizes the exhaust gas, resulting in more concentrated and higher-pressure exhaust gas. Figure 7 As shown, the two nozzle components 8 in the disturbance-type exhaust nozzle have a groove with a circular arched cross-section on one side that is close to each other. This creates an exhaust slot 17 with an elongated oval cross-section after assembly. The elongated oval exhaust slot 17 disturbs the exhaust gas, allowing it to disperse in all directions and be relatively gentle. Different models of exhaust nozzles can be replaced by removing the connecting bolts 9.

[0046] The first top plate 1 has two first through holes spaced apart in the front-to-back direction. These first through holes communicate with the suction chamber 11, forming the suction chamber outlet 15 of the suction chamber 11. The second top plate 14 has two second through holes spaced apart in the front-to-back direction. These second through holes communicate with the blowing chamber 10. The first top plate 1 has a perforation coaxial with and communicating with the second through holes. The second through holes and the corresponding perforation form the blowing chamber inlet 16 of the blowing chamber 10. Figure 4 As shown, an air outlet duct connector 18 is connected to the air intake chamber outlet 15. The air outlet duct connector 18 is used to connect to the inlet of the negative pressure air intake equipment. Figure 5 As shown, an air inlet pipe connector 19 is connected to the air blowing chamber inlet 16, which is used to connect to the outlet of the air blowing equipment. The diameter of the first through hole is larger than that of the second through hole and the perforation, so as to facilitate the distinction between the air blowing chamber inlet 16 and the air suction chamber outlet 15 when connecting the air knife to the air blowing equipment and the negative pressure suction equipment.

[0047] Each of the first and second housings has a sealing end cap at its front and rear ends. The sealing end cap has a sealing groove on the side facing the first and second housings, the shape of which matches the cross-sectional shape of the first and second housings. An O-ring is placed in the sealing groove, the O-ring being made of silicone. The sealing end cap is fixed to the ends of the first and second housings by connecting screws. The sealing end cap is not shown in the figure.

[0048] One of the vertical side plates 2 is equipped with a mounting bracket. The mounting bracket includes two connecting rods, which are arranged at intervals in the front-to-back direction. Each connecting rod includes a vertical connecting rod segment and an inclined rod end connected to the bottom end of the vertical connecting rod segment. The inclined rod segment is inclined from top to bottom in a direction away from the corresponding vertical side plate 2. The bottom ends of the two inclined rod segments are used to connect an electrostatic processor. The electrostatic processor is located diagonally below the aforementioned air knife housing. This mounting bracket is not shown in the figure.

[0049] The first shell, the second shell, the connecting block 4, and the side baffle 7 are an integral structure, specifically made of aluminum profiles manufactured through processes such as melting and casting, casting, extrusion, and surface treatment.

[0050] In use, the present invention first connects the blowing device and the negative pressure suction device to the air knife, and then starts the blowing device and the negative pressure suction device. The outlet 12 of the blowing chamber of the air knife faces the product surface. The air blown out of the outlet 12 of the blowing chamber blows up the dust on the product surface, separating the dust from the product. The inlet 13 of the suction chamber draws in the blown dust, sucking it into the suction chamber 11 and discharging it from the outlet 15 of the suction chamber, thus achieving dust removal from the product surface. When it is necessary to adjust the exhaust state of the outlet 12 of the blowing chamber according to the actual working conditions, the connecting bolt 9 can be removed and a suitable exhaust nozzle can be replaced. When it is necessary to adjust the air volume, the connecting bolt 9 can be loosened and the connection position of the nozzle assembly 8 can be adjusted, thereby adjusting the distance between the two nozzle assemblies 8.

[0051] This invention can both blow away dust from products and suck up and collect the blown dust, thus preventing the dust from escaping and effectively reducing the environmental pollution caused by the dust removal process.

[0052] In this embodiment, the second housing is disposed in the inner cavity of the first housing, the inner cavity of the second housing forms a blowing chamber, and the space between the outer side wall of the second housing and the inner side wall of the first housing forms a suction chamber. In other embodiments, the first housing and the second housing are independent of each other, and the entire inner cavity of the first housing forms a suction chamber.

[0053] In this embodiment, the connecting block is connected between the first top plate and the second top plate. In other embodiments, the connecting block may be connected between the arc-shaped plate and the vertical side plate, or between the inclined side plate and the vertical side plate.

Claims

1. A non-contact air knife, characterized in that, include: The air knife housing has relatively independent blowing chamber and suction chamber. The air knife housing is provided with an air chamber inlet and an air chamber outlet that communicate with the air chamber. The air chamber inlet is used to allow compressed gas to enter, and the air chamber outlet is used to allow compressed gas to be blown out to the product surface to blow up the dust on the product surface. The air knife housing is provided with an air chamber inlet and an air chamber outlet that communicate with the air chamber. The air chamber outlet is used to connect with the inlet of the negative pressure air suction device so that external gas and dust are drawn into the air chamber through the air chamber inlet and discharged from the air chamber outlet. The air knife housing includes a first housing and a second housing. The second housing is located inside the first housing. The inner cavity of the second housing forms the blowing chamber. The space between the first housing and the second housing forms the suction chamber surrounding the outside of the blowing chamber. The bottom of the first housing is provided with a first strip-shaped channel communicating with the air intake chamber. There are gaps between the two inner sidewalls of the first strip-shaped channel and the second housing, and these gaps form two air intake chamber inlets. The bottom of the second housing is provided with a second strip-shaped channel, the projection of the second strip-shaped channel on the first strip-shaped channel is located inside the first strip-shaped channel, and the second strip-shaped channel forms the outlet of the blowing chamber; The top of the first housing is provided with a first through hole communicating with the suction chamber, and the first through hole forms the outlet of the suction chamber. The top of the second housing is provided with a second through hole communicating with the blowing chamber. The top of the first housing is provided with a through hole coaxial with the second through hole, and the through hole and the second through hole form the inlet of the blowing chamber. The air knife housing is connected to a mounting bracket, which is used for mounting and connecting the electrostatic processor.

2. The non-contact air knife according to claim 1, characterized in that, The second housing includes two side baffles, which are located on both sides of the second strip channel and on the inside of the first strip channel. A gap is provided between the bottom end of the side baffle and the inner wall of the corresponding first strip channel to form the air intake chamber inlet.

3. A non-contact air knife according to claim 2, characterized in that, The bottom end of the side baffle extends to be flush with the bottom surface of the first housing.

4. A non-contact air knife according to any one of claims 1-3, characterized in that, The bottom of the second housing is connected to an exhaust nozzle, which has an exhaust channel that is connected to the second strip channel.

5. A non-contact air knife according to claim 4, characterized in that, The exhaust nozzle includes two nozzle components, which are located on both sides of the second strip channel. There is a gap between the two nozzle components, and a groove is provided on the side of the two nozzle components that are close to each other. The space between the two nozzle components forms the exhaust channel.

6. A non-contact air knife according to claim 5, characterized in that, The groove has a right-angled triangle cross-section, and the grooves on the two nozzle components form an inverted cone-shaped exhaust vent.

7. A non-contact air knife according to claim 6, characterized in that, The nozzle assembly is provided with an adjusting elongated hole, the length direction of which is perpendicular to the length direction of the second strip channel. The second housing is provided with threaded holes on both sides of the second strip channel. The connecting bolt passes through the adjusting elongated hole and is threadedly connected to the corresponding threaded hole to connect the nozzle assembly to the second housing.

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