Liquid absorption roller, photovoltaic cell transmission device and wet processing equipment

Abstract

The utility model discloses a liquid absorbing roller, a photovoltaic cell transmission device and wet processing equipment, the liquid absorbing roller is provided with a hollow inner cavity, the outer periphery of the liquid absorbing roller is provided with a plurality of liquid absorbing holes, the liquid absorbing holes are communicated with the hollow inner cavity, the shaft end part of at least one side of the liquid absorbing roller is provided with a negative pressure access port, and the negative pressure access port is communicated with the hollow inner cavity. And the negative pressure access port is communicated with the hollow inner cavity, so that liquid can be sucked into the hollow inner cavity through the liquid suction hole under the action of negative pressure. The photovoltaic cell piece passes through the liquid absorption roller in the conveying process after wet processing, the negative pressure introduced into the liquid absorption roller can absorb liquid on the surface of the photovoltaic cell piece, and the liquid carrying amount of the photovoltaic cell piece is reduced, so that the processing difficulty is reduced when the photovoltaic cell piece is conveyed to the next process for processing, the process flow is simplified, and the processing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic cell production field, concretely relates to a kind of liquid suction roller, photovoltaic cell's transmission device and the wet process equipment of photovoltaic cell. BACKGROUND

[0002] Photovoltaic cell production process usually needs to be treated by wet method, currently, transmission device composed of multiple transmission rollers is generally used to horizontally transmit photovoltaic cell into or out of treatment tank, chemical medicine is contained in treatment tank, and photovoltaic cell is chemically treated by contacting liquid when passing through treatment tank. After photovoltaic cell passes through treatment tank, some liquid will inevitably be attached to it, which is taken out of the treatment tank, not only causing the medicine in the treatment tank to be consumed quickly, resulting in waste of medicine and the need for frequent replenishment, but also affecting the difficulty of removing the medicine on the photovoltaic cell during subsequent process. Therefore, it is necessary to design a new transmission device to solve the above problems. SUMMARY

[0003] The utility model aims at providing a kind of liquid suction roller, photovoltaic cell's transmission device and the wet process equipment of photovoltaic cell, to solve one or more problems of prior art.

[0004] The first aspect of the utility model provides a kind of liquid suction roller, the liquid suction roller has hollow inner cavity, a plurality of liquid suction holes are arranged on the outer side of the liquid suction roller The circumferential part, the liquid suction hole is interconnected with the hollow inner cavity, at least one side shaft end of the liquid suction roller is provided with negative pressure inlet, the negative pressure inlet is communicated with the hollow inner cavity, so that liquid can be sucked into the hollow inner cavity under the action of negative pressure through the liquid suction hole.

[0005] In some embodiments, the liquid suction hole pipe includes a hollow roller body and an outer tube fixedly covered on the outer side of the roller body, the hardness of the outer tube is less than the hardness of the roller body, and the liquid suction hole penetrates the outer tube and the roller body.

[0006] In some embodiments, the liquid suction hole pipe further includes an end plug and a mandrel, the end plug is fitted on the outer side of the mandrel, and one end of the end plug is fitted and inserted into the inner cavity of the roller body from one end of the roller body,

[0007] Wherein, the mandrel is provided with a hollow channel penetrating in the axial direction, one end of the hollow channel is communicated with the inner cavity of the roller body, and the other end of the hollow channel forms the negative pressure inlet.

[0008] In some embodiments, the centerline of the mandrel extends collinearly with the centerline of the roller body, and both the roller body and the mandrel are made of corrosion-resistant material; the end plug is sealed between the roller body and the mandrel.

[0009] In some embodiments, the length of the end plug is less than the length of the mandrel. The end plug includes a plug body and a plug cap. The outer diameter of the plug body is smaller than the outer diameter of the plug cap. The plug body is fitted into the inner cavity of the roller body and is sealed to the inner peripheral wall of the roller body. The end face of the plug cap abuts against the side shaft end face of the roller body and the outer tube. The outer diameter of the plug cap is the same as the outer diameter of the outer tube.

[0010] In some embodiments, the end face of the end plug inserted into the inner cavity of the roller body is a conical surface; and / or, the end face of the mandrel facing the inner cavity of the roller body is a conical surface.

[0011] In some embodiments, the negative pressure inlet is provided on both ends of the suction roller, and a partition is fixedly provided in the hollow inner cavity of the suction roller. The partition divides the hollow inner cavity into two non-communicating sub-chambers, and the two sub-chambers are respectively connected to the negative pressure inlet on their respective sides.

[0012] In some embodiments, the suction hole is a straight hole that extends linearly along the radial direction of the suction roller; or, the suction roller is an oblique hole that extends obliquely along the radial direction of the suction roller.

[0013] In some embodiments, the cross-section of the liquid suction hole is circular, and a plurality of liquid suction holes are densely distributed on the outer periphery of the liquid suction roller; or, the liquid suction hole is elongated, and a plurality of liquid suction holes are distributed at intervals along the length extension direction of the liquid suction roller, and are distributed at intervals or staggered in the circumferential direction.

[0014] A second aspect of this invention provides a photovoltaic cell transport device, the transport device comprising a plurality of transport rollers for continuously transporting photovoltaic cells; at least one of the transport rollers is provided above a liquid suction roller to remove liquid from the upper surface of the photovoltaic cell, and / or, at least one of the transport rollers is replaced by a liquid suction roller to remove liquid from the lower surface of the photovoltaic cell, wherein the liquid suction roller is as described above.

[0015] In some embodiments, the transmission device further includes a support base, and the liquid suction roller is adjustablely positioned on the support base in the vertical direction so that the distance between the liquid suction roller and the surface of the photovoltaic cell can be adjusted.

[0016] In some embodiments, a first gear is fixedly provided at one end of the suction roller, wherein:

[0017] A second gear is provided on the conveying roller arranged vertically above the liquid suction roller, and the first gear and the second gear mesh with each other;

[0018] Alternatively, the transmission device may further include a drive gear driven to rotate by a drive motor, the drive gear meshing with the first gear.

[0019] In some embodiments, the conveying device further includes a liquid-blocking roller, at least one of the conveying rollers is disposed above the liquid-blocking roller, and a liquid-blocking channel is formed between the liquid-blocking roller and the conveying roller. When the photovoltaic cell is conveyed through the liquid-blocking channel, the liquid-blocking roller flexibly scrapes the surface of the photovoltaic cell to remove liquid from the surface of the photovoltaic cell.

[0020] In this configuration, along the transport direction of the photovoltaic cell, the liquid-absorbing roller is located behind at least one of the liquid-blocking rollers.

[0021] In some embodiments, the liquid-absorbing roller is disposed above the conveying roller, wherein the vertical distance between the liquid-blocking roller and the conveying roller is smaller than the vertical distance between the liquid-absorbing roller and the conveying roller.

[0022] In some embodiments, the number of liquid-blocking rollers is greater than the number of liquid-absorbing rollers, and the liquid-absorbing rollers are provided in one manner or in two or more consecutive arrangements.

[0023] In some embodiments, rotary joints are connected to the two ends of the suction roller, and air pipes are connected to the rotary joints. The negative pressure inlet is connected to the lumen of the air pipe through the rotary joints, and the other end of the air pipe is connected to a negative pressure source.

[0024] A third aspect of this utility model provides a wet processing apparatus for photovoltaic cells, comprising:

[0025] The processing tank includes a tank body with a cavity, through which the photovoltaic cells are transported horizontally;

[0026] As described above, in the transmission direction of the photovoltaic cells, the liquid-absorbing roller is located above the rear part of the groove cavity or behind the groove body;

[0027] The vacuum generating device has a negative pressure suction channel, and an air pipe is connected between the negative pressure inlet of the liquid suction roller and the negative pressure suction channel.

[0028] In some embodiments, the wet treatment apparatus further includes a pumping device having a branch line, a side branch line being provided on the branch line, a Venturi jet being provided on the side branch line, and a gas pipe being connected to the Venturi jet.

[0029] In some embodiments, a regulating valve is also provided on the branch pipeline to adjust the pressure of the liquid flow entering the bypass pipeline;

[0030] And / or, a filter screen is also provided on the side branch pipeline;

[0031] And / or, the outlet of the branch pipe is connected to the cavity.

[0032] In some embodiments, the vacuum generating device includes a vacuum blower and a gas-liquid separator, the gas-liquid separator having an air inlet pipe, an exhaust pipe and a drain pipe, wherein the air inlet pipe is connected to the negative pressure inlet of the liquid suction roller, and the exhaust pipe is connected to the air inlet of the vacuum blower.

[0033] In some embodiments, the vacuum generating device includes a vacuum pump and a circulation tank, wherein the suction port of the vacuum pump is connected to the negative pressure inlet of the liquid suction roller, and the discharge port and inlet of the vacuum pump are respectively connected to the circulation tank.

[0034] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The liquid suction roller, the photovoltaic cell transmission device and the wet processing equipment of this utility model, in the process of conveying the photovoltaic cell after wet processing, pass through the liquid suction roller. The negative pressure introduced into the liquid suction roller can remove the liquid on the surface of the photovoltaic cell, reduce the amount of liquid on the photovoltaic cell, thereby reducing the processing difficulty when the photovoltaic cell is sent to the subsequent process, simplifying the process flow and improving the processing efficiency. Attached Figure Description

[0035] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a three-dimensional structural diagram of a liquid suction roller assembly according to an embodiment of the present invention;

[0037] Figure 2 for Figure 1 A schematic diagram of the liquid suction roller assembly from another perspective;

[0038] Figure 3This is a cross-sectional schematic diagram of a liquid-absorbing roller according to an embodiment of the present invention;

[0039] Figure 4 for Figure 3 Enlarged diagram of section A in the middle;

[0040] Figure 5 This is a schematic diagram of the cross-sectional structure of the liquid suction roller;

[0041] Figure 6 This is a schematic diagram of the cooperation structure between the suction roller and the conveyor roller;

[0042] Figure 7 This is a schematic diagram of another embodiment of the liquid suction roller;

[0043] Figure 8 A schematic diagram of another embodiment of the liquid suction roller;

[0044] Figure 9 This is a partial structural diagram of a conveying device with a liquid suction roller;

[0045] Figure 10 This is a schematic diagram of one possible distribution of the liquid suction roller, conveying roller, and liquid blocking roller in a transmission device.

[0046] Figure 11 This is a schematic diagram of another distribution of the suction roller, conveying roller, and liquid blocking roller in a transmission device;

[0047] Figure 12 This is a schematic diagram of another distribution of the suction roller, conveying roller, and liquid blocking roller in a transmission device;

[0048] Figure 13 This is a schematic diagram showing the connection relationship between the liquid suction roller and the vacuum generating device in one embodiment;

[0049] Figure 14 This is a schematic diagram showing the connection relationship between the liquid suction roller and the vacuum generating device in another embodiment;

[0050] Figure 15 This is a schematic diagram showing the connection relationship between the liquid suction roller and the vacuum generating device in another embodiment;

[0051] in:

[0052] 1. Suction roller; 11. Suction hole; 12. Roller body; 13. Outer tube; 14. Mandrel; 141. Hollow channel; 142. Conical surface; 15. End plug; 151. Plug body; 152. Plug cap; 153. Conical surface; 16. Partition;

[0053] 2. Rotary joint; 3. Support base; 31. Mounting hole; 32. Adjustment groove;

[0054] 4. First gear; 5. Conveyor roller; 6. Second gear; 7. Liquid-blocking roller; 8. Air pipe;

[0055] 9. Vacuum generator; 90. Venturi jet injector; 91. Branch pipeline; 92. Bypass pipeline; 93. Filter; 94. Control valve; 95. Pressure gauge; 96. Gas-liquid separator; 961. Inlet pipe; 962. Drain pipe; 963. Exhaust pipe; 97. Vacuum fan; 98. Vacuum pump; 981. Inlet; 982. Drain port; 983. Inlet; 99. Circulation tank;

[0056] 10. Photovoltaic cells. Detailed Implementation

[0057] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is for the purpose of aiding understanding the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0058] See Figures 1 to 8 The suction roller assembly shown, and as shown Figures 9 to 12 The photovoltaic cell transmission device shown includes a liquid suction roller 1, which has a hollow inner cavity. A plurality of liquid suction holes 11 are provided on the outer periphery of the liquid suction roller, and the liquid suction holes 11 are interconnected with the hollow inner cavity of the liquid suction roller 1. A negative pressure inlet is provided on at least one side shaft end of the liquid suction roller 1, and the negative pressure inlet is also interconnected with the hollow inner cavity of the liquid suction roller 1.

[0059] When the liquid suction roller 1 is working, it is connected to a negative pressure source through the negative pressure inlet. Under the action of negative pressure, the liquid on the surface of the photovoltaic cell 10 is sucked into the hollow inner cavity of the liquid suction roller 1 through the liquid suction hole 11, so that the liquid on the surface of the photovoltaic cell 10 is sucked away, significantly reducing the amount of liquid on the surface of the photovoltaic cell 10. Under the continuous action of negative pressure, the liquid sucked into the hollow inner cavity of the liquid suction roller 1 is further drawn away through the negative pressure inlet. The sucked-away liquid can be further recycled or discarded.

[0060] Specifically, the liquid-absorbing roller 1 includes a hollow roller body 12 and an outer tube 13 fixedly covering the outer periphery of the roller body 12. The hardness of the outer tube 13 is less than that of the roller body 12. The liquid-absorbing holes 11 penetrate both the outer tube 13 and the roller body 12. The roller body 12 can be made of a corrosion-resistant material, such as SUS316 stainless steel, to withstand prolonged contact with chemical solutions without corrosion. The outer tube 13 is made of a soft material, such as PP, which allows it to directly contact the surface of the photovoltaic cell 10, reducing the risk of breakage. During manufacturing, the outer tube 13 is coaxially fixedly covered onto the outer periphery of the roller body 12, and then through holes are opened on the outer periphery of the integral tube formed by the two to form multiple liquid-absorbing holes 11.

[0061] The roller body 12 is specifically a hollow cylindrical tube. The liquid suction roller 1 also includes an end plug 15 and a mandrel 14. The end plug 15 is fitted onto the outer periphery of the mandrel 14, and one end of the end plug 15 is inserted into the inner cavity of the roller body 12 from one end of the roller body 12. The mandrel 14 has a hollow channel 141 that extends axially. One end of the hollow channel 141 is connected to the inner cavity of the roller body 12, and the other end of the hollow channel 141 forms the negative pressure inlet of the liquid suction roller 1.

[0062] Both the core 14 and the end plug 15 have two sets respectively disposed on the two shaft ends of the roller body 12. The arrangement of the end plug 15 and the core 14 serves two purposes: firstly, the core 14 is fixedly installed on the shaft end of the roller body 12, which facilitates the rotational connection of the liquid suction roller 1 with external components and the connection with the negative pressure source; secondly, it also closes the inner cavity of the roller body 12 at the shaft end and forms a negative pressure inlet that communicates with the inner cavity of the roller body 12. This makes the overall manufacturing of the liquid suction roller 1 more convenient and easier to realize.

[0063] Specifically, the axis of the mandrel 14 extends collinearly with the axis of the roller body 12. Both the mandrel 14 and the roller body 12 are made of corrosion-resistant material, and both can be made of SUS316 stainless steel tubing. The end plug 15 is sealed between the roller body 12 and the mandrel 14. The end plug 15 can also be made of a soft material, such as PP material, which can be sealed between the mandrel 14 and the roller body 12 to achieve good fixing and sealing effects.

[0064] In this embodiment, the length of the end plug 15 is less than the length of the mandrel 14, and the part of the mandrel 14 not covered by the end plug 15 is used to connect external components. The end plug 15 specifically includes a plug body 151 and a plug cap 152. The outer diameter of the plug body 151 is smaller than the outer diameter of the plug cap 152. The plug body 151 is inserted into the inner cavity of the roller body 12 and is sealed to the inner peripheral wall of the roller body 12. The end face of the plug cap 152 abuts against the shaft end face of the roller body 12 and the outer tube 13. The outer diameter of the plug cap 152 is the same as the outer diameter of the outer tube 13, so that the end plugs 15 at both ends and the outer tube 13 in the middle appear to be a single component.

[0065] See Figure 3 , Figure 4 As shown, the end face of the end plug 15 inserted into the inner cavity of the roller body 12 is a conical surface 153, and the end face of the spindle 14 facing the inner cavity of the roller body 12 is also a conical surface 142. This conical surface design allows the liquid to enter the inner cavity of the roller body 12 more smoothly and be discharged outward through the negative pressure inlet, thus avoiding the accumulation of liquid droplets in the inner cavity of the roller body 12.

[0066] In this embodiment, hollow channels 141 are provided on both sides of the spindle 14 and negative pressure inlets are formed. A partition 16 is also fixedly provided in the hollow inner cavity of the liquid suction roller 1. The partition 16 divides the hollow inner cavity of the liquid suction roller 1 into two non-communicating sub-chambers. The two sub-chambers are respectively connected to the negative pressure inlets on their respective sides, so that they are connected to the negative pressure source. The partition 16 makes the negative pressure adsorption forces on both sides independent and does not interfere with each other.

[0067] See Figure 5 As shown, the suction hole 11 can be configured as a straight hole as shown in Figure (a), which extends in a straight line along the radial direction of the suction roller 1; the suction hole 11 can also be configured as an oblique hole as shown in Figure (b), which extends obliquely along the radial direction of the suction roller 1, with an oblique angle α of about 10°, such as 12° in this case. In this way, when the suction roller 1 contacts the surface of the photovoltaic cell 10, the suction hole 11 will not be blocked by the surface of the photovoltaic cell 10, and can absorb liquid on the surface near the contact area between the suction roller 1 and the photovoltaic cell 10, making it easier to remove liquid from the surface of the photovoltaic cell 10.

[0068] The cross-section of the suction hole 11 can be circular, such as... Figures 1 to 6 As shown, the outer periphery of the liquid suction roller 1 is densely covered with a plurality of such liquid suction holes 11. During the rotation of the liquid suction roller 1, different liquid suction holes 11 face the surface of the photovoltaic cell 10, and along the length extension direction of the liquid suction roller 1, the liquid suction holes 11 at different positions correspond to the surfaces of multiple different photovoltaic cells 10 or different areas on the same photovoltaic cell 10, so that the liquid on the surface of the photovoltaic cell 10 is sucked away.

[0069] In other embodiments, the suction holes 11 can also be elongated, with multiple elongated suction holes distributed at intervals along the length extension direction of the suction roller 1, and arranged circumferentially at intervals or in a staggered manner, such as... Figure 7 , Figure 8 As shown. Of course, the pore diameter, longitudinal density, circumferential density, position, length, etc. of the suction hole 11 can be adjusted according to the actual process requirements.

[0070] See Figures 9 to 12As shown, the liquid suction roller 1 is disposed in the photovoltaic cell transmission device. The transmission device also includes a conveying roller 5, which has a plurality of rollers arranged sequentially at intervals. The axis of the plurality of conveying rollers 5 is arranged in the horizontal direction and is perpendicular to the transmission direction of the photovoltaic cell 10. The photovoltaic cell 10 is supported on the plurality of conveying rollers 5 and is transmitted along the transmission direction.

[0071] The centerline of the liquid suction roller 1 is parallel to the centerline of the conveying roller 5, and a liquid suction roller 1 is provided above at least one conveying roller 5 for absorbing liquid from the upper surface of the photovoltaic cell 10, and / or, at least one conveying roller 5 is replaced by a liquid suction roller 1 for absorbing liquid from the lower surface of the photovoltaic cell 10.

[0072] The transmission device also includes a support base 3. The liquid-absorbing roller 1 is vertically adjustable on the support base 3 so that the distance between the liquid-absorbing roller 1 and the surface of the photovoltaic cell 10 can be adjusted. Specifically, a support base 3 is provided on both ends of the liquid-absorbing roller 1. The support bases 3 at both ends can be adjusted simultaneously so that the axis of the liquid-absorbing roller 1 is at different heights. Specifically, the support base 3 has a mounting hole 31 and an adjustment groove 32. The end of the conveying roller 5, which is arranged vertically with the liquid-absorbing roller 1, can be installed in the mounting hole 31. Then, the mandrel 14 at the end of the liquid-absorbing roller 1 is installed in the adjustment groove 32. By adjusting the position of the mandrel 14 in the adjustment groove 32, the position of the liquid-absorbing roller 1 on the support base 3 can be adjusted, thereby adjusting the distance between it and the surface of the photovoltaic cell 10.

[0073] A first gear 4 is fixedly mounted on one end of the suction roller 1, and a second gear 6 is mounted on the conveyor roller 5 arranged vertically above the suction roller 1. The first gear 4 and the second gear 6 mesh with each other. In this way, the suction roller 1 is driven to rotate by the gears, which can prevent the photovoltaic cells 10 from being adsorbed onto the suction roller 1 and causing damage or jamming. When the suction roller 1 and the conveyor roller 5 are arranged side by side to remove liquid from the lower surface of the photovoltaic cells 10, the conveying device is also equipped with a drive gear (not shown in the figure) driven by a drive motor. This drive gear meshes with the first gear 4, thereby driving the suction roller 1 to rotate.

[0074] The transmission device also includes a liquid-blocking roller 7. At least one conveying roller 5 is positioned above the liquid-blocking roller 7, with its axis parallel to the axis of the conveying roller 5. A liquid-blocking channel is formed between the liquid-blocking roller 7 and the conveying roller 5. When the photovoltaic cell 10 is conveyed through the liquid-blocking channel, the liquid-blocking roller 7 flexibly scrapes against the surface of the photovoltaic cell 10 to remove liquid from its surface. Specifically, the outer circumferential surface of the liquid-blocking roller 7 is provided with a flexible material, such as sponge, foam, rubber, or silicone. When the photovoltaic cell 10 is conveyed through the liquid-blocking channel, its upper and lower surfaces contact the liquid-blocking roller 7 and the conveying roller 5 respectively. The liquid-blocking roller 7 flexibly scrapes against the surface of the photovoltaic cell 10, significantly removing liquid from its surface.

[0075] Along the transport direction of the photovoltaic cell, the liquid suction roller 1 is located behind at least one liquid blocking roller 7. After most of the liquid on the surface of the photovoltaic cell 10 is removed by the liquid blocking roller 7, the liquid suction roller 1 removes the remaining liquid on the surface of the photovoltaic cell 10, further reducing the amount of liquid carried out from the surface of the photovoltaic cell 10.

[0076] In a specific configuration, when the liquid-absorbing roller 1 is positioned above the conveying roller 5, the vertical distance between the liquid-blocking roller 7 and the conveying roller 5 is smaller than the vertical distance between the liquid-absorbing roller 1 and the conveying roller 5. This ensures that a certain gap exists between the photovoltaic cell 10 and the liquid-absorbing roller 1 when the roller passes through it, preventing the liquid-absorbing hole 11 from being blocked by the surface of the photovoltaic cell 10 and thus preventing the photovoltaic cell 10 from being fixedly adsorbed onto the liquid-absorbing roller 1. Alternatively, when the liquid-absorbing roller 1 is positioned between two adjacent conveying rollers 5 to remove liquid from the lower surface of the photovoltaic cell 10, the liquid-absorbing roller 1 can also be arranged below the lower surface of the photovoltaic cell 10.

[0077] In the conveying device, the number of liquid-blocking rollers 7 is greater than the number of liquid-absorbing rollers 1. The number of liquid-absorbing rollers 1 is one, or two or more are arranged consecutively. For example... Figure 10 In the illustrated embodiment, the liquid-absorbing roller 1 is arranged only above the conveying roller 5. After the liquid-blocking roller 7 removes most of the liquid from the surface of the photovoltaic cell 10, the liquid-absorbing roller 1 further removes the liquid from the upper surface of the photovoltaic cell 10. The liquid-absorbing roller 1 can also be configured in two or more sets, such as... Figure 12 In the illustrated embodiment, there are two suction rollers 1, and the two suction rollers 1 are arranged consecutively. For example... Figure 11 In the embodiment shown, a liquid suction roller 1 is arranged above one set of conveying rollers 5 to remove liquid from the upper surface of the photovoltaic cell 10. Another set of liquid suction rollers 1 is arranged adjacent to the conveying roller 5 to remove liquid from the lower surface of the photovoltaic cell 10. The two sets of liquid suction rollers 1 are arranged adjacent to each other.

[0078] Rotary joints 2 are connected to the ends of the shafts on both sides of the liquid suction roller 1. Air pipes 8 are connected to the rotary joints 2. The negative pressure inlet is connected to the lumen of the air pipe 8 through the rotary joints 2. The other end of the air pipe 8 is connected to a negative pressure source. During the operation of the liquid suction roller 1, the air pipe 8 and the negative pressure source remain stationary. The liquid suction roller 1 can rotate relative to the air pipe 8 through the rotary joints 2, so that multiple liquid suction holes 11 alternately pass over the surface of the photovoltaic cell 10.

[0079] Specifically, in the wet processing equipment for photovoltaic cells, such as electroplating and developing equipment, the processing equipment also includes a processing tank (not shown in the figure). The processing tank includes a tank body with a cavity, which is used to hold the processing solution. The photovoltaic cell 10 is transported horizontally through the cavity and comes into contact with the solution in the cavity to achieve chemical processing.

[0080] Along the conveying direction of the photovoltaic cell 10, the liquid-blocking roller 7 can be specifically located at the rear of the tank, that is, it removes most of the liquid on the surface of the photovoltaic cell 10 just before it leaves the tank cavity, and the removed liquid can fall directly into the tank cavity for recycling. The liquid-absorbing roller 1 is specifically located above the rear of the tank cavity or outside the tank cavity and behind the tank body.

[0081] The wet processing equipment also includes a vacuum generating device 9, which is used to form a negative pressure source. The vacuum generating device 9 has a negative pressure suction channel, and an air pipe 8 is connected between the negative pressure inlet of the liquid suction roller 1 and the negative pressure suction channel.

[0082] See Figure 13 In the illustrated embodiment, the wet processing equipment also includes a pumping device, which is mainly used to replenish liquid in the processing tank. The pumping device has a branch pipe 91, a side branch pipe 92 is provided on the branch pipe 91, and a Venturi jet 90 is provided on the side branch pipe 92. The air pipe 8 is connected to the Venturi jet 90. The liquid flowing through the branch pipe 91 generates suction when it passes through the Venturi jet 90, which can directly draw the liquid on the surface of the photovoltaic cell 10 into the air pipe 8 through the liquid suction roller 1, and further into the branch pipe 91.

[0083] The branch pipe 91 is also equipped with a regulating valve 94 to adjust the pressure of the liquid flow entering the bypass pipe 92, thereby adjusting the suction force generated at the Venturi ejector 90. The bypass pipe 92 is also equipped with a filter screen 93 to filter the liquid passing through it and prevent foaming. The outlet of the branch pipe 91 is connected to the cavity of the treatment tank, so that the liquid sucked into the branch pipe 91 can be directly sent back to the treatment tank for recycling, avoiding liquid waste. The branch pipe 91 is also equipped with a pressure gauge 95 to monitor the pressure of the liquid flow after adjustment by the regulating valve 94.

[0084] See Figure 14 In the illustrated embodiment, the vacuum generating device 9 includes a vacuum blower 97 and a gas-liquid separator 96. The gas-liquid separator 96 has an inlet pipe 961, an exhaust pipe 963, and a drain pipe 962. The inlet pipe 961 is connected to the negative pressure inlet of the suction roller 1, and the exhaust pipe 963 is connected to the air inlet of the vacuum blower 97. The vacuum blower 97 creates a negative pressure, and the gas-liquid mixture drawn in is separated by the gas-liquid separator 96. The liquid can be discharged or recovered through the drain pipe 962.

[0085] See Figure 15 In the embodiment shown, the vacuum generating device 9 includes a vacuum pump 98 and a circulation tank 99. The suction port 981 of the vacuum pump 98 is connected to the negative pressure inlet of the liquid suction roller 1. The discharge port 982 and the inlet port 983 of the vacuum pump 98 are respectively connected to the circulation tank 99. The sucked-in liquid will directly enter the circulation tank 99 and will not be recycled.

[0086] The liquid suction roller 1 of this utility model can be used to directly replace one or more rollers in an existing transmission device, and the rotary joints 2 are connected to both ends, and the negative pressure source is connected through the air pipe 8. The installation is very convenient and can be directly modified on the existing transmission device.

[0087] After the photovoltaic cell 10 undergoes wet processing in the processing tank, the liquid on the surface of the photovoltaic cell 10 can be removed during the process of passing through the liquid suction roller 1, which avoids liquid residue on the photovoltaic cell 10 and reduces the difficulty of subsequent processing.

[0088] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A liquid suction roller, characterized in that: The liquid suction roller has a hollow inner cavity, and a plurality of liquid suction holes are provided on the outer periphery of the liquid suction roller. The liquid suction holes are interconnected with the hollow inner cavity. A negative pressure inlet is provided on at least one side shaft end of the liquid suction roller. The negative pressure inlet is connected to the hollow inner cavity so that liquid can be sucked into the hollow inner cavity through the liquid suction holes under the action of negative pressure.

2. The liquid suction roller according to claim 1, characterized in that: The liquid suction hole tube includes a hollow roller body and an outer tube fixedly covering the outer periphery of the roller body. The hardness of the outer tube is less than that of the roller body, and the liquid suction hole penetrates both the outer tube and the roller body.

3. The liquid suction roller according to claim 2, characterized in that: The liquid suction tube also includes an end plug and a mandrel. The end plug is fitted onto the outer periphery of the mandrel, and one end of the end plug is inserted into the inner cavity of the roller body from one end of the roller body. The mandrel has a hollow channel extending axially through it. One end of the hollow channel is connected to the inner cavity of the roller body, and the other end of the hollow channel forms the negative pressure inlet.

4. The liquid suction roller according to claim 3, characterized in that: The centerline of the mandrel extends collinearly with the centerline of the roller body, and both the roller body and the mandrel are made of corrosion-resistant material; the end plug is sealed between the roller body and the mandrel.

5. The liquid suction roller according to claim 3, characterized in that: The length of the end plug is less than the length of the mandrel. The end plug includes a plug body and a plug cap. The outer diameter of the plug body is smaller than the outer diameter of the plug cap. The plug body is inserted into the inner cavity of the roller body and is sealed to the inner peripheral wall of the roller body. The end face of the plug cap abuts against the side shaft end face of the roller body and the outer tube. The outer diameter of the plug cap is the same as the outer diameter of the outer tube.

6. The liquid suction roller according to claim 3, characterized in that: The end face of the end plug inserted into the inner cavity of the roller body is a conical surface; and / or, the end face of the mandrel facing the inner cavity of the roller body is a conical surface.

7. The liquid suction roller according to claim 1, characterized in that: The negative pressure inlet is provided on both ends of the suction roller. A partition is also fixedly provided in the hollow inner cavity of the suction roller, which divides the hollow inner cavity into two non-communicating sub-cavities. The two sub-cavities are respectively connected to the negative pressure inlet on their respective sides.

8. The liquid suction roller according to claim 1, characterized in that: The liquid suction hole is a straight hole that extends linearly along the radial direction of the liquid suction roller; or, the liquid suction roller is an oblique hole that extends obliquely along the radial direction of the liquid suction roller.

9. The liquid suction roller according to claim 1, characterized in that: The liquid suction hole has a circular cross-section, and multiple liquid suction holes are densely distributed on the outer periphery of the liquid suction roller; or, the liquid suction hole is elongated, and multiple liquid suction holes are distributed at intervals along the length extension direction of the liquid suction roller, and are distributed at intervals or staggered in the circumferential direction.

10. A transmission device for photovoltaic cells, characterized in that, The conveying device includes multiple conveying rollers for continuously conveying photovoltaic cells; at least one of the conveying rollers is provided with a liquid-absorbing roller above it to remove liquid from the upper surface of the photovoltaic cells, and / or, at least one of the conveying rollers is replaced with a liquid-absorbing roller to remove liquid from the lower surface of the photovoltaic cells. The liquid suction roller is as described in any one of claims 1 to 9.

11. The photovoltaic cell transmission device according to claim 10, characterized in that: The transmission device also includes a support base, and the liquid suction roller is adjustablely positioned on the support base in the vertical direction so that the distance between the liquid suction roller and the surface of the photovoltaic cell can be adjusted.

12. The photovoltaic cell transmission device according to claim 10, characterized in that: A first gear is fixedly provided at one end of the suction roller shaft, wherein: A second gear is provided on the conveying roller arranged vertically above the liquid suction roller, and the first gear and the second gear mesh with each other; Alternatively, the transmission device may further include a drive gear driven to rotate by a drive motor, the drive gear meshing with the first gear.

13. The photovoltaic cell transmission device according to claim 10, characterized in that: The transmission device also includes a liquid-blocking roller, and at least one of the conveying rollers is provided above the liquid-blocking roller. A liquid-blocking channel is formed between the liquid-blocking roller and the conveying roller. When the photovoltaic cell is conveyed through the liquid-blocking channel, the liquid-blocking roller flexibly scrapes the surface of the photovoltaic cell to remove the liquid on the surface of the photovoltaic cell. Wherein, along the transport direction of the photovoltaic cell, the liquid-absorbing roller is located behind at least one of the liquid-blocking rollers; The liquid-absorbing roller is positioned above the conveying roller, and the vertical distance between the liquid-blocking roller and the conveying roller is smaller than the vertical distance between the liquid-absorbing roller and the conveying roller. The number of liquid-blocking rollers is greater than the number of liquid-absorbing rollers, and there is one liquid-absorbing roller or two or more continuously arranged; And / or, a rotary joint is connected to the two ends of the suction roller shaft, and an air pipe is connected to the rotary joint. The negative pressure inlet is connected to the lumen of the air pipe through the rotary joint, and the other end of the air pipe is connected to a negative pressure source.

14. A wet processing apparatus for photovoltaic cells, characterized in that, include: The processing tank includes a tank body with a cavity, through which the photovoltaic cells are transported horizontally; The transmission device, as described in any one of claims 10 to 13, wherein in the transmission direction of the photovoltaic cell, the liquid-absorbing roller is located above the rear part of the groove cavity or behind the groove body; The vacuum generating device has a negative pressure suction channel, and an air pipe is connected between the negative pressure inlet of the liquid suction roller and the negative pressure suction channel.

15. The wet processing equipment for photovoltaic cells according to claim 14, characterized in that: The wet treatment equipment also includes a pumping device, which has a branch pipeline, a side branch pipeline, and a Venturi jet injector. The gas pipe is connected to the Venturi jet injector.

16. The wet processing equipment for photovoltaic cells according to claim 15, characterized in that: The branch pipeline is also equipped with a regulating valve to adjust the pressure of the liquid flow entering the bypass pipeline; And / or, a filter screen is also provided on the side branch pipeline; And / or, the outlet of the branch pipe is connected to the cavity.

17. The wet processing equipment for photovoltaic cells according to claim 15, characterized in that: The vacuum generating device includes a vacuum blower and a gas-liquid separator. The gas-liquid separator has an air inlet pipe, an exhaust pipe, and a drain pipe. The air inlet pipe is connected to the negative pressure inlet of the liquid suction roller, and the exhaust pipe is connected to the air inlet of the vacuum blower.

18. The wet processing equipment for photovoltaic cells according to claim 15, characterized in that: The vacuum generating device includes a vacuum pump and a circulation tank. The suction port of the vacuum pump is connected to the negative pressure inlet of the liquid suction roller, and the discharge port and inlet of the vacuum pump are respectively connected to the circulation tank.

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