Detection sensor suitable for photovoltaic welding strip tailing reduction

Abstract

The utility model belongs to the technical field of photovoltaic module production, and particularly relates to a detection sensor suitable for photovoltaic welding strip tailing reduction, which comprises a support part, a detection part, a detection part, a detection part and a control part, and is characterized in that the support part is rotatably connected to a fixed shaft which is fixedly mounted on an unwinding device; the welding strip detection part is fixedly connected to the end, away from the fixed shaft, of the support part, the welding strip detection part is arranged corresponding to the position, wound with the welding strip, of the winding roll, the welding strip detection part makes contact with the winding roll, the winding roll is detachably connected to the unwinding shaft, and the unwinding shaft is installed on the unwinding device; the welding strip detection device can detect whether a welding strip exists on the winding roll or not, the situation that an alarm is given when part of the welding strip exists on the winding roll is avoided, and waste of the welding strip is effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic component production, and in particular relates to a detection sensor suitable for reducing photovoltaic welding ribbon tails. Background Art

[0002] Photovoltaic welding ribbon is an important component of photovoltaic modules. It is an electrical connection component used in the series or parallel connection of photovoltaic cells, playing an important role in conducting electricity and gathering electricity to increase the output voltage and power of photovoltaic modules. Photovoltaic welding ribbon is commonly known as tin-coated copper ribbon. It is mainly divided into bus welding ribbon (bus welding ribbon) and interconnect welding ribbon (interconnect strip) according to its use.

[0003] The photovoltaic cell automatic welding machine needs to use an unwinding device to provide the welding tape. The photovoltaic welding tape is wound on the winding reel. The photovoltaic cell automatic welding machine consumes the welding tape on the winding reel during the welding process. After the welding tape is consumed, the winding reel needs to be replaced manually. The existing automatic welding machine for cells usually has a sensor to detect whether there is a welding tape. When the welding tape on the reel detects that the welding tape exposes an empty shaft, the equipment will stop working and remind employees to replace the reel. However, the length of the winding reel is much larger than the detection width of the sensor. During use, there is a situation where one end of the winding reel is wound with welding tape and the other end is in an optical axis state. At this time, if the sensor is located at the optical axis end, it will be judged that the welding tape has been used up, and there is a waste of welding tape tails. Utility Model Content

[0004] The utility model aims to provide a detection sensor suitable for reducing photovoltaic welding ribbon tail material to solve the above-mentioned problem.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] A detection sensor suitable for reducing photovoltaic ribbon tailings, comprising:

[0007] The bracket part is rotatably connected to the fixed shaft, and the fixed shaft is fixedly installed on the unwinding device;

[0008] A welding tape detection unit is fixedly connected to an end of the bracket unit away from the fixed axis, the welding tape detection unit is arranged corresponding to the position where the welding tape is wound on the winding roll, the welding tape detection unit is arranged in contact with the winding roll, the winding roll is detachably connected to the unwinding shaft, and the unwinding shaft is installed on the unwinding device;

[0009] The solder strip detection portion includes a connection box fixedly connected to the bracket portion, a solder strip detection probe is fixedly connected to one end of the connection box away from the bracket portion, the solder strip detection probe is arranged in contact with the winding reel, an electromagnetic coil is installed in the solder strip detection probe, the electromagnetic coil is electrically connected to a circuit chip, the circuit chip is fixedly installed in the connection box, the circuit chip is electrically connected to a cable, and the cable is electrically connected to an external control system.

[0010] Preferably, the bracket portion comprises:

[0011] A connecting block, rotatably connected to the outer side wall of the fixed shaft;

[0012] A first connecting rod, fixedly connected to the connecting block, wherein one end of the first connecting rod away from the connecting block is fixedly connected to the connecting box;

[0013] A torque mechanism and a limiting mechanism are arranged between the connecting block and the fixed shaft.

[0014] Preferably, a groove is provided at one end of the first connecting rod away from the connecting block, and the groove is located on the bottom surface of the first connecting rod. A first countersunk groove is provided on the first connecting rod, and the small end of the first countersunk groove passes through the top surface of the groove. The connecting box is located in the groove, and a second countersunk groove is provided on the connecting box, and the small end of the second countersunk groove is arranged corresponding to the small end of the first countersunk groove. Bolts are passed through the first countersunk groove and the second countersunk groove, and the first connecting rod and the connecting box are fixedly connected by the bolts.

[0015] Preferably, the torque mechanism comprises:

[0016] A torsion spring, sleeved on the fixed shaft and located on one side of the connecting block, one end of the torsion spring being fixedly connected to the fixed shaft;

[0017] The limiting protrusion is fixedly connected to one side of the connecting block close to the torsion spring, and the limiting protrusion abuts against the other end of the torsion spring.

[0018] Preferably, the limiting mechanism comprises:

[0019] A mounting hole is provided on the outer side wall of the fixed shaft;

[0020] A spring, one end of which is fixedly connected to the bottom of the mounting hole;

[0021] A limiting ball is slidably connected in the mounting hole, one end of the limiting ball is fixedly connected to the other end of the spring, and the limiting ball extends out of the mounting hole;

[0022] A limiting groove is provided on the inner side wall of the connecting block and is arranged corresponding to the limiting ball, and the limiting groove is adapted to the limiting ball.

[0023] Preferably, an auxiliary roller is rotatably connected to the bottom surface of the welding ribbon detection probe, the auxiliary roller is arranged along the length direction of the welding ribbon detection probe, and the auxiliary roller is in rolling contact with the winding roll.

[0024] Preferably, the external control system includes:

[0025] A PLC controller is electrically connected to the circuit chip through the cable.

[0026] Compared with the prior art, the utility model has the following advantages and technical effects:

[0027] In the utility model, the bracket part is rotatably connected to the fixed shaft of the unwinding device, and the welding tape detection part is fixedly connected to the bracket part and is arranged in contact with the winding roll. When working, the electromagnetic coil in the welding tape detection probe generates an alternating electromagnetic field. When the welding tape is located in the magnetic field, eddy currents will be generated in the welding tape. This eddy current will absorb the energy of the oscillator, causing the oscillation to weaken or stop. By detecting this change, the welding tape detection probe can determine whether the welding tape exists, thereby detecting whether the welding tape is used up. When the welding tape is used up, the external control system controls the equipment to stop working, and sends an alarm to remind the staff to replace the new winding roll.

[0028] The utility model can detect whether there is a welding strip on the winding roll, and will not sound an alarm when part of the welding strip still exists on the winding roll, thereby effectively avoiding the waste of the welding strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor:

[0030] Figure 1 It is an overall schematic diagram of the utility model;

[0031] Figure 2 It is the front view of the utility model;

[0032] Figure 3 It is a top view of the utility model;

[0033] Figure 4 This is a schematic diagram of the structure of the welding strip detection probe in the utility model;

[0034] Figure 5 for Figure 2 A partial enlarged view of the middle A;

[0035] Figure 6 for Figure 2 A partial enlarged view of point B in the middle;

[0036] Among them, 1. unwinding device; 2. first connecting rod; 3. fixed shaft; 4. torsion spring; 5. unwinding shaft; 6. winding roll; 7. welding tape detection probe; 8. connecting box; 9. connecting block; 10. limiting protrusion; 11. limiting groove; 12. limiting ball; 13. mounting hole; 14. spring; 15. first countersunk groove; 16. second countersunk groove; 17. bolt; 18. circuit chip; 19. cable; 20. electromagnetic coil; 21. auxiliary roller. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] Reference Figures 1 to 6 The utility model discloses a detection sensor suitable for reducing photovoltaic welding ribbon tails, comprising:

[0040] The bracket part is rotatably connected to the fixed shaft 3, and the fixed shaft 3 is fixedly mounted on the unwinding device 1;

[0041] The welding tape detection part is fixedly connected to the end of the bracket part away from the fixed shaft 3. The welding tape detection part is arranged corresponding to the position of the welding tape wound on the winding roll 6. The welding tape detection part is arranged in contact with the winding roll 6. The winding roll 6 is detachably connected to the unwinding shaft 5. The unwinding shaft 5 is installed on the unwinding device 1;

[0042] The solder strip detection part includes a connection box 8 fixedly connected to the bracket part, a solder strip detection probe 7 is fixedly connected to one end of the connection box 8 away from the bracket part, the solder strip detection probe 7 is arranged in contact with the winding roll 6, an electromagnetic coil 20 is installed in the solder strip detection probe 7, the electromagnetic coil 20 is electrically connected to a circuit chip 18, the circuit chip 18 is fixedly installed in the connection box 8, the circuit chip 18 is electrically connected to a cable 19, and the cable 19 is electrically connected to an external control system.

[0043] In the utility model, the bracket part is rotatably connected to the fixed shaft 3 of the unwinding device, and the welding tape detection part is fixedly connected to the bracket part and is arranged in contact with the winding roll 6. When working, the electromagnetic coil in the welding tape detection probe 7 generates an alternating electromagnetic field. When the welding tape is located in the magnetic field, eddy currents will be generated in the welding tape. This eddy current will absorb the energy of the oscillator, causing the oscillation to weaken or stop. By detecting this change, the welding tape detection probe 7 can determine whether the welding tape exists, thereby detecting whether the welding tape is used up. When the welding tape is used up, the external control system controls the equipment to stop working and sends an alarm to remind the staff to replace the new winding roll.

[0044] The winding coil 6 is made of non-metallic non-conductive material.

[0045] The working principle of the welding strip detection probe 7 is the same as that of the metal detector in the prior art, and this embodiment only briefly describes the principle.

[0046] The utility model can detect whether there is a welding strip on the winding roll, and will not sound an alarm when part of the welding strip still exists on the winding roll, thereby effectively avoiding the waste of the welding strip.

[0047] To further optimize the solution, the bracket part includes:

[0048] A connecting block 9 is rotatably connected to the outer side wall of the fixed shaft 3;

[0049] A first connecting rod 2 is fixedly connected to the connecting block 9, and one end of the first connecting rod 2 away from the connecting block 9 is fixedly connected to the connecting box 8;

[0050] A torque mechanism and a limiting mechanism are provided between the connecting block 9 and the fixed shaft 3 .

[0051] A further optimized solution is provided, in which a groove is provided at one end of the first connecting rod 2 away from the connecting block 9, and the groove is located on the bottom surface of the first connecting rod 2. A first countersunk groove 15 is provided on the first connecting rod 2, and the small end of the first countersunk groove 15 passes through the top surface of the groove. The connecting box 8 is located in the groove, and a second countersunk groove 16 is provided on the connecting box 8, and the small end of the second countersunk groove 16 is arranged corresponding to the small end of the first countersunk groove 15. Bolts 17 are passed through the first countersunk groove 15 and the second countersunk groove 16, and the first connecting rod 2 and the connecting box 8 are fixedly connected by the bolts 17.

[0052] Further optimization scheme, the torque mechanism includes:

[0053] A torsion spring 4 is sleeved on the fixed shaft 3 and is located on one side of the connecting block 9, and one end of the torsion spring 4 is fixedly connected to the fixed shaft 3;

[0054] The limiting protrusion 10 is fixedly connected to one side of the connecting block 9 close to the torsion spring 4 , and the limiting protrusion 10 abuts against the other end of the torsion spring 4 .

[0055] To further optimize the solution, the limit mechanism includes:

[0056] A mounting hole 13 is provided on the outer side wall of the fixed shaft 3;

[0057] A spring 14, one end of which is fixed to the bottom of the mounting hole 13;

[0058] The limiting ball 12 is slidably connected in the mounting hole 13, one end of the limiting ball 12 is fixedly connected to the other end of the spring 14, and the limiting ball 12 extends out of the mounting hole 13;

[0059] The limiting groove 11 is formed on the inner side wall of the connecting block 9 and is arranged corresponding to the limiting ball 12 . The limiting groove 11 is adapted to the limiting ball 12 .

[0060] According to a further optimization scheme, an auxiliary roller 21 is rotatably connected to the bottom surface of the welding strip detection probe 7 , and the auxiliary roller 21 is arranged along the length direction of the welding strip detection probe 7 , and the auxiliary roller 21 is in rolling contact with the winding roll 6 .

[0061] The auxiliary roller 21 can reduce the friction between the welding strip detection probe 7 and the welding strip.

[0062] To further optimize the solution, the external control system includes:

[0063] PLC controller, the PLC controller is electrically connected to the circuit chip 18 via a cable 19 .

[0064] Usage process:

[0065] One end of the torsion spring 4 is fixedly connected to the fixed shaft 3, and the other end is in contact with the limiting protrusion 10 on the connecting block 9, so that the welding strip detection probe 7 is closely attached to the welding strip wound on the winding roll 6, so as to detect the use of the welding strip;

[0066] When the solder strip detection probe 7 detects that the solder strip is used up, it transmits a signal to the PLC controller, and the PLC controller controls the equipment to stop working and sounds an alarm to remind the staff to replace the winding reel 6;

[0067] When replacing, pull the first connecting rod 2 upwards. When the limiting groove 11 moves to the limiting ball 12, the limiting ball 12 extends into the limiting groove 11 to complete the limiting. At this time, the first connecting rod 2 is separated from the winding reel 6, and the winding reel 6 can be replaced. After the replacement is completed, the first connecting rod 2 can be put down again.

[0068] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0069] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A detection sensor suitable for reducing photovoltaic welding ribbon tailings, characterized in that: include: A bracket portion, rotatably connected to a fixed shaft (3), wherein the fixed shaft (3) is fixedly mounted on the unwinding device (1); a welding tape detection unit, fixedly connected to an end of the bracket unit away from the fixed shaft (3), the welding tape detection unit being arranged corresponding to a position on the winding roll (6) where the welding tape is wound, the welding tape detection unit being arranged in contact with the winding roll (6), the winding roll (6) being detachably connected to the unwinding shaft (5), and the unwinding shaft (5) being mounted on the unwinding device (1); The solder strip detection unit comprises a connection box (8) fixedly connected to the bracket unit, a solder strip detection probe (7) is fixedly connected to one end of the connection box (8) away from the bracket unit, the solder strip detection probe (7) is arranged in contact with the winding roll (6), an electromagnetic coil (20) is installed in the solder strip detection probe (7), the electromagnetic coil (20) is electrically connected to a circuit chip (18), the circuit chip (18) is fixedly installed in the connection box (8), the circuit chip (18) is electrically connected to a cable (19), and the cable (19) is electrically connected to an external control system.

2. A detection sensor suitable for reducing photovoltaic welding ribbon tails according to claim 1, characterized in that: The bracket portion comprises: A connecting block (9) rotatably connected to the outer side wall of the fixed shaft (3); A first connecting rod (2) is fixedly connected to the connecting block (9), and one end of the first connecting rod (2) away from the connecting block (9) is fixedly connected to the connecting box (8); A torque mechanism and a limiting mechanism are provided between the connecting block (9) and the fixed shaft (3).

3. A detection sensor suitable for reducing photovoltaic welding ribbon tails according to claim 2, characterized in that: A groove is provided at one end of the first connecting rod (2) away from the connecting block (9), and the groove is located on the bottom surface of the first connecting rod (2). A first countersunk groove (15) is provided on the first connecting rod (2), and the small end of the first countersunk groove (15) passes through the top surface of the groove. The connecting box (8) is located in the groove. A second countersunk groove (16) is provided on the connecting box (8), and the small end of the second countersunk groove (16) is arranged corresponding to the small end of the first countersunk groove (15). Bolts (17) are inserted into the first countersunk groove (15) and the second countersunk groove (16), and the first connecting rod (2) and the connecting box (8) are fixedly connected by the bolts (17).

4. A detection sensor suitable for reducing photovoltaic welding ribbon tails according to claim 2, characterized in that: The torque mechanism comprises: a torsion spring (4), which is sleeved on the fixed shaft (3) and located on one side of the connecting block (9), and one end of the torsion spring (4) is fixedly connected to the fixed shaft (3); The limiting protrusion (10) is fixedly connected to one side of the connecting block (9) close to the torsion spring (4), and the limiting protrusion (10) abuts against the other end of the torsion spring (4).

5. A detection sensor suitable for reducing photovoltaic welding ribbon tails according to claim 2, characterized in that: The limiting mechanism comprises: A mounting hole (13) is provided on the outer side wall of the fixed shaft (3); A spring (14), one end of which is fixedly connected to the bottom of the mounting hole (13); A limiting ball (12) is slidably connected in the mounting hole (13), one end of the limiting ball (12) is fixedly connected to the other end of the spring (14), and the limiting ball (12) extends out of the mounting hole (13); A limiting groove (11) is provided on the inner side wall of the connecting block (9) and is arranged corresponding to the limiting ball (12); the limiting groove (11) is adapted to the limiting ball (12).

6. A detection sensor suitable for reducing photovoltaic welding ribbon tails according to claim 1, characterized in that: An auxiliary roller (21) is rotatably connected to the bottom surface of the welding strip detection probe (7); the auxiliary roller (21) is arranged along the length direction of the welding strip detection probe (7); and the auxiliary roller (21) is in rolling contact with the winding roll (6).

7. A detection sensor suitable for reducing photovoltaic welding ribbon tails according to claim 1, characterized in that: The external control system comprises: A PLC controller, wherein the PLC controller is electrically connected to the circuit chip (18) via the cable (19).

Images