A nitrogen cooling device for welding ribbon

Abstract

The present invention discloses a nitrogen cooling device for soldering ribbons, comprising: a cavity defined by a box body and at least one shock-absorbing wall; the shock-absorbing wall divides the cavity into at least two compartments, with air paths communicating between the compartments; the cavity cools the soldering ribbon using nitrogen gas filled therein. The nitrogen gas exchanges heat with the moving soldering ribbon, cooling the tin layer on the ribbon's surface, increasing the condensation rate of the tin layer and shortening the cooling and condensation time of the ribbon. The shock-absorbing wall eliminates the effect of nitrogen gas circumferential flow on the ribbon, resulting in a more even distribution of the tin layer on the ribbon's surface and improving the ribbon's surface finish.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic soldering ribbons, and in particular to all tin-coated soldering ribbon products. Background Art

[0002] Photovoltaic welding ribbon, also known as tin-coated copper ribbon, is a copper ribbon of a certain size covered with a layer of uniform tin-based solder of a certain thickness. The key function of photovoltaic welding ribbon is to transmit and converge the current generated by the solar cell.

[0003] Currently, during the tinning process, cold air is required to cool the surface of the solder ribbon to ensure a stable weld between the copper and tin layers. This is due to the high production speed of the existing tinning process, coupled with the low efficiency of cold air cooling, which results in a slow condensation of the tin layer. Furthermore, direct blowing of the cold air causes the semi-molten tin to randomly disperse, resulting in an uneven tin layer distribution. During the subsequent winding process, the surface tin layer easily rubs against the contact guide roller, causing tin layer scratches and affecting the quality of the solder ribbon. Consequently, existing solder ribbon cooling devices have low cooling efficiency, an uneven tin layer, and are prone to scratches.

[0004] Therefore, it is urgent to propose a new cooling device to solve the above problems. Summary of the Invention

[0005] The invention discloses a nitrogen cooling device for a welding strip, which can effectively shorten the cooling and condensation time of the welding strip, ensure the stable production of the welding strip, and improve the quality of the welding strip.

[0006] The present invention provides the following solutions:

[0007] A nitrogen cooling device for a welding ribbon comprises: a cavity defined by a box body and at least one shock-absorbing wall located in the cavity;

[0008] The shock-absorbing wall is used to separate the cavity into at least two compartments, and the air paths between the compartments are connected;

[0009] The cavity is provided with a nitrogen inlet for cooling the welding strip to be cooled in the cavity by utilizing the nitrogen filled therein.

[0010] Optionally, the welding ribbon nitrogen cooling device further comprises a welding ribbon inlet and a welding ribbon outlet provided on the cavity and a winding device provided outside the box body;

[0011] The welding ribbon is arranged between the welding ribbon inlet and the welding ribbon outlet;

[0012] The winding device is used to wind the welding ribbon coming out of the welding ribbon outlet to drive the welding ribbon to move in the cavity.

[0013] Preferably, the nitrogen cooling device for the welding strip further comprises: at least one limiting guide wheel disposed in the cavity;

[0014] The limiting guide wheel is arranged between the welding strip inlet and the welding strip outlet, and is used to limit the welding strip to be cooled in a direction perpendicular to the traveling direction.

[0015] Preferably, the position limiting guide wheels are in N groups, and each group includes two position limiting guide wheels;

[0016] The two limiting guide wheels in each group are staggered and arranged on both sides of the welding strip.

[0017] Preferably, the box body includes an upper cover plate and a lower shell, and the upper cover plate and the lower shell form a sealed cavity.

[0018] Preferably, the welding strip is cooled by nitrogen, and each of the shock-absorbing walls is provided with a through hole to achieve gas communication between the compartments;

[0019] The welding strip to be cooled passes through the welding strip inlet and the through hole in sequence to the welding strip outlet.

[0020] Preferably, the lower shell includes a bottom surface and side surfaces surrounding the bottom surface, and the shock-absorbing wall is connected to the bottom surface and has a height flush with that of the side surfaces.

[0021] Optionally, the nitrogen cooling device for the welding ribbon further comprises: a liquid nitrogen storage device located outside the box body and a vaporizer provided in the at least one compartment and communicating with the gas path of the compartment;

[0022] The liquid nitrogen in the liquid nitrogen storage device is transported to the vaporizer through the nitrogen inlet, and is gasified by the vaporizer to form the nitrogen gas which is then filled into the cavity.

[0023] Optionally, the liquid nitrogen storage device is provided with a solenoid valve and a flow valve;

[0024] The solenoid valve is used to control the flow valve according to the temperature in the cavity, so as to adjust the flow rate of the liquid nitrogen delivered by the liquid nitrogen storage device to the vaporizer.

[0025] Optionally, the nitrogen cooling device for the welding strip further includes: a temperature detection device provided on the cavity, for detecting the real-time temperature in the cavity and converting the temperature data into a signal to transmit to the solenoid valve.

[0026] Optionally, the welding ribbon nitrogen cooling device further comprises: a pressure relief valve and a connecting pipe;

[0027] The pressure relief valve is in communication with the air path of the cavity through the communicating pipe, and is used to open and relieve pressure when the pressure value in the cavity exceeds a preset pressure value.

[0028] Optionally, the nitrogen cooling device for the welding strip further includes: a pressure detection device provided on the cavity, for detecting the real-time pressure in the cavity and converting the pressure data into a signal to transmit to the pressure relief valve.

[0029] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0030] In the present application, the cooling device uses nitrogen to cool the soldering ribbon in the cavity. The nitrogen temperature is low, and cooling the soldering ribbon can quickly cool the tin layer on the surface of the soldering ribbon, thereby increasing the condensation rate of the tin layer, so that the cooling of the soldering ribbon can match the high production speed of the soldering ribbon in the tin coating process, thereby improving the overall production efficiency of the soldering ribbon. Moreover, the nitrogen cooling gas is not blown directly, which avoids the random dispersion of the tin liquid and the uneven distribution of the tin layer caused by direct blowing, making the tin layer on the surface of the soldering ribbon more evenly distributed and improving the surface finish of the soldering ribbon. The tin layer is evenly distributed and cools quickly, thereby reducing the strain on the tin layer on the surface of the soldering ribbon caused by friction with the guide wheel in the subsequent winding process, and also eliminating the burns caused by the high-temperature soldering ribbon to other parts of the equipment.

[0031] At least one shock-absorbing wall is set in the cavity, which divides the cavity into at least two compartments. The existence of the compartment slows down the flow rate of nitrogen and reduces the nitrogen vortex, thereby effectively reducing the vibration of the welding ribbon caused by the nitrogen vortex. The welding ribbon is more stable in the cavity, and the tin liquid will not be dispersed or dropped due to vibration, so that the tin layer on the surface of the welding ribbon is more evenly distributed, the surface finish of the welding ribbon is improved, and the strain caused by the friction between the tin layer on the surface of the welding ribbon and the guide wheel in the subsequent winding process is further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 1 is a schematic structural diagram of a nitrogen cooling device for a welding ribbon provided by one embodiment of the present invention;

[0034] Figure 2 1. It is a top view of a nitrogen cooling device for a welding ribbon provided by one embodiment of the present invention;

[0035] Figure 3 This is a connection diagram of a liquid nitrogen storage device of a nitrogen cooling device for welding strips provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0037] It should be noted that the descriptions of directions such as "left," "right," "left end," "right end," "upper," "lower," "top," and "bottom" in the present invention are defined based on the orientations or positions shown in the accompanying drawings. These are intended solely to facilitate the description of the present invention and to simplify the description. They do not indicate or imply that the structure described must be constructed and operated in a specific orientation and are therefore not to be construed as limiting the present invention. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0038] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0039] This application aims to provide a nitrogen cooling device for soldering ribbons. Within the cooling cavity, a nitrogen buffering shock-absorbing wall is installed to slow down nitrogen movement and reduce nitrogen circumferential flow. By utilizing the characteristics of nitrogen gas, such as low temperature, rapid cooling, no direct blowing, and minimal circumferential flow, the device reduces the scattering of the soldering ribbon tin layer and the possibility of it falling due to vibration, thereby achieving rapid cooling, uniform distribution, and a smooth finish for the soldering ribbon tin layer.

[0040] Example 1

[0041] In the soldering ribbon cooling process, the method of using cold air to cool the soldering ribbon is inefficient and has poor cooling effect. The present invention proposes a first embodiment of a nitrogen cooling device for soldering ribbon, which uses nitrogen to cool the soldering ribbon in a cavity, and uses nitrogen to exchange heat with the soldering ribbon, which has high cooling efficiency. At the same time, a shock-absorbing wall is provided to slow down the impact of excessive nitrogen flow on the soldering ribbon, making the soldering ribbon more stable, thereby ensuring a uniform tin layer. Figure 1 and Figure 3 As shown, the cooling device is a box structure, the box body 50 has a cavity 300, and the solder strip 100 to be cooled is located in the cavity 300. Nitrogen is filled into the cavity 300 through the nitrogen inlet 15 provided on the cavity 300 to cool the solder strip 100. At least one shock-absorbing wall (such as Figure 1315, 325, 335, 345), the shock absorbing wall divides the cavity 300 into at least two compartments (such as Figure 1 310, 320, 330, 340, 350), the air paths between the compartments are connected.

[0042] The temperature of nitrogen is low, and using nitrogen to cool the soldering ribbon 100 can quickly cool the tin layer on the surface of the soldering ribbon, thereby increasing the condensation rate of the tin layer. This allows the cooling of the soldering ribbon 100 to match the high production speed of the soldering ribbon 100 in the tin coating process, thereby increasing the overall production efficiency of the soldering ribbon 100. The nitrogen inlet 15 allows nitrogen to be filled into the cavity at a balanced rate, thereby avoiding the problem of uneven gas distribution caused by direct nitrogen filling and improving the stability of nitrogen flow. Multiple shock-absorbing walls block the rapid flow of nitrogen, reduce nitrogen circumference, reduce vibration to the soldering ribbon 100, and avoid the random dispersion of tin liquid and uneven distribution of the tin layer caused by direct nitrogen blowing, thereby making the tin layer on the surface of the soldering ribbon 100 more evenly distributed and improving the surface finish of the soldering ribbon 100.

[0043] Preferably, the number of nitrogen inlets and damping walls is determined by the volume of cavity 300. The number of nitrogen inlets and damping walls can be increased based on practical needs. Adding nitrogen inlets effectively increases the nitrogen content within cavity 300, accelerating the cooling of solder ribbon 100. Adding damping walls strengthens the barrier against rapid nitrogen flow, reduces nitrogen evaporation, and minimizes vibration to solder ribbon 100. This prevents tin dispersion caused by direct nitrogen blowing, resulting in a more evenly distributed tin layer on the surface of solder ribbon 100 and improving the surface finish of solder ribbon 100.

[0044] The box body and cavity in the present application can be set to various shapes as needed, such as rectangular, circular, cylindrical, etc.

[0045] Example 2

[0046] The soldering strip is cooled in the cavity, and the soldering strip needs to be placed in the cavity first. In this application, when there is a small amount of soldering strip, the soldering strip can be placed in the cavity manually and taken out after cooling. However, under normal circumstances, the soldering strip is moved and wound after being tinned and cooled, that is, the tinned soldering strip in continuous movement needs to be cooled. In order to make the soldering strip form a relatively fixed moving route, the present invention proposes Example 2 of a nitrogen cooling device for soldering strip. On the basis of Example 1, a soldering strip inlet and outlet is added to the cavity 300, and a winding device is added outside the cavity to drive the soldering strip to move. Figure 1As shown, the chamber 300 is equipped with a welding ribbon inlet 800, a welding ribbon outlet 900, and a winding device (not shown) located outside the chamber 300. When the cooling device is not in operation, the welding ribbon 100 is threaded between the welding ribbon inlet 800 and the welding ribbon outlet 900 by a machine or manually, and the end of the welding ribbon exiting the welding ribbon outlet 900 is wound around the winding device. When in operation, the winding device winds the welding ribbon 100, driving the welding ribbon 100 from the welding ribbon inlet 800 to the welding ribbon outlet 900 within the chamber 300.

[0047] The design of the solder ribbon inlet 800 and outlet 900 facilitates the solder ribbon 100's entry and exit from the cavity 300, providing a standardized path that aligns with the actual production process of moving and rewinding the tin-coated solder ribbon, thereby improving production efficiency. Furthermore, the solder ribbon 100 moves more smoothly within the cavity 300, reducing the risk of the solder ribbon 100 accumulating in the cavity 300 after cooling.

[0048] Preferably, multiple sets of paired welding ribbon inlets and welding ribbon outlets can be provided, so that multiple welding ribbons can be cooled simultaneously, thereby improving the carrying capacity of the cooling device.

[0049] The positions of the welding ribbon inlet 800 and the welding ribbon outlet 900 in this application can be set as needed. Figure 1 As shown, the ribbon inlet 800 and the ribbon outlet 900 can be positioned on two opposing sides of the cavity 300 in the longitudinal direction, allowing the ribbon 100 to move in a straight line. Alternatively, the ribbon inlet 800 and the ribbon outlet 900 can be positioned on adjacent sides, allowing the ribbon 100 to move in a curved manner. For easier control, the ribbon inlet 800 and the ribbon outlet 900 can be positioned on one side and one top of the cavity 300, allowing the ribbon 100 to curve and exit from the top surface of the cavity 300. To achieve this, steering wheels can be positioned within the cavity 300.

[0050] Example 3

[0051] When the welding strip moves in the cavity, if it encounters a rapid nitrogen flow, the welding strip is easily blown by the nitrogen and causes unstable vibration. The present invention proposes a third embodiment of a nitrogen cooling device for welding strips. Based on the second embodiment, a limiting guide wheel is provided between the welding strip inlet and outlet provided on the cavity. Figure 2 As shown, a limited guide wheel (such as Figure 2 610, 710 shown), the limiting guide wheel is located between the welding strip inlet 800 and the welding strip outlet 900, and is used to limit the welding strip 100 in a direction perpendicular to the traveling direction.

[0052] The limiting guide wheel 610 limits the welding strip 100 so that the welding strip 100 runs at a set position during movement, preventing the welding strip 100 from being deflected during movement, and allowing the welding strip to stably exit from the center of the welding strip outlet 900.

[0053] Furthermore, the limiting guide wheels 610 in the cavity 300 can be set as N groups, each group including two limiting guide wheels (such as Figure 2 600, 700 shown). Each group of two limiting guide wheels (such as Figure 2 The illustrated guide wheels 610 and 620 are staggered on both sides of the welding ribbon 100 to limit the position of the adjacent opposite sides of the welding ribbon 100. Multiple sets of limiting guide wheels limit the welding ribbon 100 multiple times, ensuring that the welding ribbon 100 remains in the set position during movement, avoiding unstable operation of the welding ribbon and improving the stability of the production process.

[0054] Example 4

[0055] After nitrogen is introduced into the cavity, it will leak out from the top of the cavity, resulting in a low nitrogen content in the cavity, low cooling efficiency, and easy frostbite to operators. The present invention proposes a fourth embodiment of a nitrogen cooling device for welding strips. Based on the third embodiment, a cover plate is provided on the top of the cavity to solve the problem of nitrogen leakage. Figure 1 As shown, the box body 50 includes an upper cover plate 150 and a lower shell 200 , which are assembled and tightly closed to form a cavity 300 .

[0056] The design of the upper cover 150 makes the cavity 300 airtight, and the nitrogen is not easily dispersed from the top of the box body 50, thereby improving the utilization rate of the nitrogen and the stability of the nitrogen circulation in the cavity 300.

[0057] Furthermore, a sealing gasket is provided between the upper cover plate 150 and the lower shell 200 to further improve the sealing of the cavity 300 and prevent inefficiency and frostbite caused by nitrogen leakage.

[0058] Example 5

[0059] In order to allow the welding strip and nitrogen to pass between the compartments, the present invention proposes a fifth embodiment of a nitrogen cooling device for welding strips. Based on the fourth embodiment, a through hole is set on each shock-absorbing wall to facilitate the welding strip to pass through, and the nitrogen flows between the compartments through the through hole. Figure 1 As shown, each shock-absorbing wall is provided with a through hole (such as Figure 1 The illustrated 316, 326, 336, 346) realize the air path communication between the compartments. During the movement of the soldering ribbon 100 in the cavity 300, the soldering ribbon 100 passes through the soldering ribbon inlet 800 and each through hole in sequence to the soldering ribbon outlet 900.

[0060] The through-hole design improves the efficiency of nitrogen flow between the compartments, limiting the nitrogen flow rate and preventing excessive nitrogen flow from causing vibration to the soldering ribbon 100. This ensures smoother operation of the soldering ribbon 100 within the cavity and a more uniform tin layer on the surface. The through-hole also acts as a position limiter for the soldering ribbon 100, ensuring it remains centered when passing through the through-hole, avoiding friction with the damping wall and improving its operational stability.

[0061] Preferably, the hole diameter of the through hole can be set to 1.2 to 1.5 times the width of the solder strip 100, so that the solder strip 100 can pass through the through hole unimpeded, and the smaller hole diameter can make the nitrogen gas have less impact on the tin liquid on the surface of the solder strip 100 when passing through the through hole, avoiding the situation where the nitrogen gas flow rate is too fast and blows away the tin liquid.

[0062] Furthermore, the lower shell 200 includes a bottom surface and side surfaces surrounding the bottom surface. The shock-absorbing wall is connected to the bottom surface and its height is flush with the side surface. That is, when the upper cover plate 150 is closed, the bottom surface of the upper cover plate 150 is completely in contact with the top surface of the shock-absorbing wall 315, and nitrogen cannot pass through the top surface, thereby avoiding the uneven distribution of nitrogen in the compartment caused by the dispersion of nitrogen, further improving the stability of nitrogen circulation, and improving the cooling efficiency.

[0063] Example 6

[0064] The nitrogen filled into the cavity can be directly supplied from the nitrogen storage tank, that is, the nitrogen inlet 15 ( Figure 3 As shown in the figure, nitrogen can be introduced directly from the outside. Due to the limited volume of the nitrogen storage tank and the weak continuous gas supply capacity, the present invention proposes a sixth embodiment of a nitrogen cooling device for welding strips. Based on the fifth embodiment, a liquid nitrogen storage device is used to supply liquid to the cooling device, and the liquid nitrogen is gasified into nitrogen gas by the vaporizer in the cooling device and filled into the cavity. Figure 2 and Figure 3 As shown, a liquid nitrogen storage device (not shown) is provided outside the box body 50. A vaporizer 400 is provided within the compartment, and the vaporizer 400 is in gas communication with the compartment. Liquid nitrogen within the liquid nitrogen storage device is transported to the vaporizer 400 via the nitrogen inlet 15. After being vaporized by the vaporizer 400, the nitrogen gas is filled into the cavity 300 through the vaporization outlet 450. In this embodiment, the nitrogen inlet 15 is fed with liquid nitrogen from the outside, rather than directly with nitrogen gas.

[0065] The liquid nitrogen storage device provides a large amount of liquid nitrogen to the cooling device to ensure the continuous operation of the cooling process. The vaporizer 400 is located in the compartment and is connected to the compartment gas path. Nitrogen can be directly charged into the cavity 300, avoiding the problem of nitrogen loss during transmission and improving the utilization rate of nitrogen.

[0066] Preferably, there can be multiple gasifiers 400. Multiple gasifiers accelerate the speed of nitrogen generation and improve the efficiency of nitrogen cooling.

[0067] Preferably, a liquid nitrogen nozzle 10 is provided in the vaporizer 400 for spraying liquid nitrogen into the vaporizer 400, so as to facilitate the vaporizer 400 to perform a vaporization operation on the dispersed water droplet-like liquid nitrogen and improve the cooling efficiency.

[0068] Preferably, the nitrogen inlet 15 is a one-way valve, which avoids the problem of liquid nitrogen backflow after entering the vaporizer 400 and ensures the stability of the liquid nitrogen supply into the vaporizer 400.

[0069] Preferably, one end of the nitrogen inlet 15 is connected to the delivery pipe 20, and the end away from the delivery pipe 20 is connected to the liquid nitrogen nozzle 10. Liquid nitrogen passes through the delivery pipe 20 and the nitrogen inlet 15 directly into the liquid nitrogen nozzle 10, thereby avoiding loss of liquid nitrogen in the vaporizer and improving the efficiency of liquid nitrogen vaporization.

[0070] Furthermore, the liquid nitrogen storage device is provided with a solenoid valve 30 and a flow valve 35. The solenoid valve 30 controls the flow valve 35 according to the temperature in the cavity 300 to adjust the flow rate of liquid nitrogen delivered by the liquid nitrogen storage device to the vaporizer 400. This can effectively avoid the problem of poor cooling effect of the welding strip caused by unstable temperature in the cavity 300, and improve the stability of the nitrogen cooling process.

[0071] Furthermore, the cavity 300 is provided with a temperature detection device 1100 for detecting the real-time temperature in the cavity 300 and converting the temperature data into a signal to transmit to the solenoid valve 30 , which can accurately measure the temperature in the cavity 300 and provide timely feedback.

[0072] Preferably, there can be multiple temperature detection devices 1100, which are arranged at different positions of the cavity 300. The average value of the temperature data detected by each device is converted into a signal and transmitted to the solenoid valve 30. Multiple data sampling improves the accuracy of the temperature data.

[0073] Example 7

[0074] Excessive pressure in the cavity can damage the equipment and even cause explosion. For this reason, the present invention proposes a seventh embodiment of a nitrogen cooling device for welding strips. Based on the sixth embodiment, a pressure relief valve is provided on the cavity to relieve pressure in time when the cavity pressure is too high. Figure 2 As shown, the pressure relief valve 500 is connected to the pressure relief valve 500 through the connecting pipe (such as Figure 2 The valves 510, 520, and 530 shown are in gas communication with the cavity 300 and are opened to release pressure when the pressure in the cavity 300 exceeds a preset pressure value.

[0075] The pressure relief valve 500 is combined with the connecting pipe. When the pressure in the cavity 300 is too high, the valve is opened in time to exhaust the air, avoiding the situation where the pressure in the cavity 300 is too high and the gas pressurization damages the equipment, thereby ensuring the stability of the air pressure in the cavity 300.

[0076] Preferably, there can be multiple communicating tubes, and all of the communicating tubes are connected to the cavity 300 , which can increase the speed of pressure relief and ensure the stability of the air pressure in the cavity 300 .

[0077] Furthermore, the cavity 300 is provided with a pressure detection device 1000 for detecting the real-time pressure in the cavity 300 and converting the pressure data into a signal to be transmitted to the pressure relief valve 500 .

[0078] Preferably, there can be multiple pressure detection devices 1000, which are arranged at different positions of the cavity 300. The average value of the pressure data detected by each device is converted into a signal and transmitted to the pressure relief valve 500. The sampling of multiple data improves the accuracy of the pressure data.

[0079] Example 8

[0080] Embodiment 8 of the present invention provides a nitrogen cooling device for a welding strip and its operating process:

[0081] like Figure 1 、 Figure 2 、 Figure 3 As shown, the cooling device includes a box body 50 having an upper cover plate 150 and a lower shell 200. The upper cover plate 150 and the lower shell 200 are tightly assembled to form a cavity 300. Shock-absorbing walls separate the cavity 300 into multiple compartments, such as a first shock-absorbing wall 315 and a second shock-absorbing wall 325, which separate the cavity 300 into a first compartment 310 and a second compartment 320. Each shock-absorbing wall has a through-hole, such as shock-absorbing wall 315 having a through-hole 316. A welding ribbon inlet 800 and a welding ribbon outlet 900 are provided on opposite sides of the cavity 300. A winding device is provided on the outside of the cooling device for winding the cooled welding ribbon 100. The welding ribbon inlet 800, the welding ribbon outlet 900, and the through-holes of each shock-absorbing wall are aligned. In a preferred embodiment, the diameters of the welding ribbon inlet 800 and the welding ribbon outlet 900 are equal to or slightly larger than the diameter of the tube through-hole, facilitating the stable passage of the welding ribbon 100. There are also multiple sets of limiting guide wheels (such as Figure 2 610, 620, 710, 720 shown), the two limiting guide wheels in each group are staggered and arranged on both sides of the welding strip 100, such as left and right or up and down, so that the welding strip 100 does not touch the inner wall of the tube perforation, thereby achieving the limitation of the adjacent opposite side of the welding strip 100.

[0082] The cavity 300 is provided with a nitrogen inlet 15 connected to an external liquid nitrogen storage device. A vaporizer 400 is provided in the compartment. The vaporizer is provided with a liquid nitrogen nozzle 10 connected to the nitrogen inlet 15. The vaporizer 400 is provided with a vaporization outlet 450 on the side facing the cavity 300.

[0083] The liquid nitrogen storage device is equipped with a solenoid valve 30 and a flow valve 35. The solenoid valve 30 controls the flow valve 35 based on the temperature within the cavity 300 to adjust the flow rate of liquid nitrogen delivered from the liquid nitrogen storage device to the vaporizer 400. The cavity 300, such as the fifth compartment 350, is equipped with a temperature detection device 1100 for detecting the real-time temperature within the cavity 300 and converting the temperature data into a signal that is transmitted to the solenoid valve 30.

[0084] The cavity 300 is provided with a pressure relief valve 500, which is connected to the pressure relief valve 500 through a connecting pipe (such as Figure 2 510, 520, and 530) are in air communication with the cavity 300. Specifically, the pressure relief valve 500 is in air communication with the second compartment 320, the third compartment 330, and the fourth compartment 340 via the first connecting pipe 510, the second connecting pipe 520, and the third connecting pipe 530, respectively. The first compartment 310 is equipped with a pressure detection device 1000, which is used to detect the real-time air pressure within the cavity 300 and convert the pressure data into a signal to transmit to the pressure relief valve 500, thereby controlling the opening and closing of the pressure relief valve 500.

[0085] During the cooling process, the upper cover 150 and lower housing 200 are closed, and the tinned solder ribbon 100 is inserted between the solder ribbon inlet 800 and the solder ribbon outlet 900. The liquid nitrogen cooling device is activated to supply liquid nitrogen into the cavity 300, and the vaporizer 400 is activated to vaporize the liquid nitrogen. The temperature detection device 1100 and the pressure detection device 1000 perform real-time monitoring.

[0086] Under the winding device, the welding ribbon 100 first enters the first compartment 310 for cooling from the welding ribbon entrance 800, passes through the first shock-absorbing wall 315 through the first through hole 316, then enters the second compartment 320 for cooling, passes through the second shock-absorbing wall 325 through the second through hole 326, and then enters the third compartment 330 for cooling. After being limited by the first set of limiting guide wheels 600, it passes through the third shock-absorbing wall 335 through the third through hole 336, then enters the fourth compartment 340 for cooling, passes through the fourth shock-absorbing wall 345 through the fourth through hole 346, and finally enters the fifth compartment 350 for cooling. After being limited by the second set of limiting guide wheels 700 again, it exits from the welding ribbon outlet 900.

[0087] Liquid nitrogen enters the vaporizer through the liquid nitrogen inlet 15 and reaches the cavity 300 through the vaporization outlet 450 after vaporization. The nitrogen that has just entered the cavity 300 is briefly distributed in the fourth compartment 340. Due to the presence of the through hole, the nitrogen gradually diffuses to the remaining four compartments. As time goes by, the nitrogen fills the entire cavity 300 and is distributed in the five compartments to cool the moving solder strip.

[0088] When the temperature in the cavity 300 is too high, the temperature detection device 1100 will promptly convert the temperature data into a control signal and transmit it to the solenoid valve 30. After receiving the signal instruction, the solenoid valve 30 controls the flow valve 35 to open the valve, and the supply of liquid nitrogen increases; when the temperature in the cavity is too low, the temperature detection device 1100 will promptly convert the temperature data into a control signal and transmit it to the solenoid valve 30. After receiving the signal instruction, the solenoid valve 30 controls the flow valve 35 to close the valve, and the supply of liquid nitrogen decreases.

[0089] When the air pressure in the cavity 300 is too high, the pressure detection device 1000 will promptly convert the pressure data into a control signal and transmit it to the pressure relief valve 500. After receiving the signal instruction, the pressure relief valve 500 opens the valve to release the nitrogen to relieve the pressure in time.

[0090] The technical solutions provided by the present invention have been described in detail above. Specific examples have been used herein to illustrate the structure and implementation of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will appreciate that the specific implementation and scope of application may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A nitrogen cooling device for a welding strip, characterized in that: include: A cavity defined by the box body and at least one shock-absorbing wall located in the cavity, wherein the cavity is provided with a welding ribbon inlet and a welding ribbon outlet; The shock-absorbing wall is used to separate the cavity into at least two compartments, and the air paths between the compartments are connected; The cavity is further provided with a nitrogen inlet for cooling the welding strip to be cooled in the cavity by using the nitrogen filled therein; N groups of limiting guide wheels are arranged in the cavity and located between the welding strip inlet and the welding strip outlet. Each group includes two limiting guide wheels and the two limiting guide wheels are staggered on both sides of the welding strip, which are used to limit the welding strip in a direction perpendicular to the travel direction.

2. The nitrogen cooling device for welding strip according to claim 1, characterized in that: It also includes a winding device arranged outside the box body; The welding ribbon is arranged between the welding ribbon inlet and the welding ribbon outlet; The winding device is used to wind the welding ribbon coming out of the welding ribbon outlet to drive the welding ribbon to move in the cavity.

3. The nitrogen cooling device for welding strip according to claim 1 or 2, characterized in that: The box body includes an upper cover plate and a lower shell body, and the upper cover plate and the lower shell body form a sealed cavity.

4. The nitrogen cooling device for welding strip according to claim 1 or 2, characterized in that: Each of the shock-absorbing walls is provided with a through hole to achieve air path communication between the compartments; The welding strip to be cooled passes through the welding strip inlet and the through hole in sequence to the welding strip outlet.

5. The nitrogen cooling device for welding strip according to claim 3, characterized in that: The lower shell includes a bottom surface and side surfaces arranged around the bottom surface. The shock-absorbing wall is connected to the bottom surface and has a height flush with that of the side surfaces.

6. The nitrogen cooling device for welding strip according to claim 1, characterized in that: It also includes: a liquid nitrogen storage device located outside the box body and a vaporizer located in the at least one compartment and communicating with the gas path of the compartment; The liquid nitrogen in the liquid nitrogen storage device is transported to the vaporizer through the nitrogen inlet, and is gasified by the vaporizer to form the nitrogen gas which is then filled into the cavity.

7. The nitrogen cooling device for welding strip according to claim 6, characterized in that: The liquid nitrogen storage device is provided with a solenoid valve and a flow valve; The solenoid valve is used to control the flow valve according to the temperature in the cavity, so as to adjust the flow rate of the liquid nitrogen delivered by the liquid nitrogen storage device to the vaporizer.

8. The nitrogen cooling device for welding strip according to claim 7, characterized in that: Also includes: The temperature detection device provided on the cavity is used to detect the real-time temperature in the cavity to generate temperature data, and convert the temperature data into a signal to be transmitted to the solenoid valve.

9. The nitrogen cooling device for welding strip according to claim 1, characterized in that: Also includes: Pressure relief valve and connecting pipe; The pressure relief valve is in communication with the air path of the cavity through the communicating pipe, and is used to open and relieve pressure when the pressure value in the cavity exceeds a preset pressure value.

10. The nitrogen cooling device for welding strip according to claim 9, characterized in that: Also includes: The pressure detection device provided on the cavity is used to detect the real-time pressure in the cavity to generate pressure data, and convert the pressure data into a signal to be transmitted to the pressure relief valve.

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