A kind of testing equipment for thermistor quality inspection

Abstract

The invention discloses a detection device for quality inspection of thermistors, and relates to the technical field of quality inspection of thermistors, including an explosion-proof mechanism, and also including: an impact isolation mechanism, which is installed on the explosion-proof mechanism and is used to isolate the impact of a problematic resistor on the detection environment of other resistors during the detection process; a detection mechanism, which is installed on the explosion-proof mechanism and is used to detect the resistance value of the resistor and obtain the change of the resistor during the detection process; the invention installs the impact isolation mechanism and sets a detection groove in a thermal insulation material to isolate the thermistors to achieve batch testing in a separate environment, and the resistor with thermal runaway is separated from the resistor detection group and falls into a water tank to be extinguished, so as to avoid the bad resistor from thermal runaway igniting nearby resistors during the detection process, and also avoid the temperature generated by the thermal runaway resistor causing the surrounding temperature of other resistors to rise, thereby causing the resistance value of the resistor to be abnormal and affecting the detection data.

Description

Technical Field

[0001] The present invention relates to the technical field of thermistor quality inspection, and in particular to a detection device for thermistor quality inspection. Background Art

[0002] A thermistor is a sensor resistor whose resistance value changes with temperature.

[0003] After thermistors are produced, they need to be tested in a variety of ways, including current resistance testing. The resistance value of the resistor is obtained by inputting currents of different currents to determine the quality of the resistor. However, due to the different quality of the resistors, poor quality resistors will experience thermal runaway due to the increase in current during the test. Thermal runaway of thermistors refers to the abnormal temperature rise of thermistors under specific conditions. It is usually due to the self-heating effect caused by overcurrent, which makes the temperature of the thermistor exceed the melting point of its substrate, resulting in "substrate melting" and fire and explosion. The production process requires a large number of resistors that need to be tested in batches. During the batch testing process, the thermal runaway of a resistor will affect the testing of the surrounding resistors, causing the external environment temperature of the resistor to rise, thereby causing the resistance value of the resistor to change, affecting the data of the current input resistance detection, resulting in abnormal test results, and severely igniting the surrounding resistors, causing damage to normal resistors. Summary of the invention

[0004] The present invention provides a thermistor quality inspection device to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A detection device for quality inspection of a thermistor, comprising an explosion-proof mechanism, and further comprising:

[0007] Impact isolation mechanism, which is installed on the explosion-proof mechanism and is used to isolate the impact of problematic resistors on other resistor detection environments during the detection process;

[0008] A detection mechanism, which is installed on the explosion-proof mechanism and is used to detect the resistance value of the resistor and obtain the change of the resistor during the detection process;

[0009] A material receiving mechanism, which is installed on the explosion-proof mechanism and is used to unload the resistors that have been successfully tested;

[0010] A cleaning mechanism, which is installed on the explosion-proof mechanism and is used to clean the waste residue and smoke generated by the damage;

[0011] A driving mechanism, which is connected to the material receiving mechanism and the cleaning mechanism, and is used to drive the material receiving mechanism and the cleaning mechanism to operate;

[0012] The temperature reduction mechanism is installed on the explosion-proof mechanism and is used to reduce the temperature of the detection position of the damaged resistor.

[0013] Furthermore, the explosion-proof mechanism includes a water tank, the interior of which is filled with liquid, a pull-out mesh plate is slidably mounted on one side of the water tank, and a support frame is fixed on the top of the water tank.

[0014] Furthermore, the impact isolation mechanism includes a thermal insulation plate fixed on the inner walls on both sides of the support frame, a plurality of detection slots are opened through the thermal insulation plate, a plurality of movable baffles corresponding to the detection slots are arranged at the bottom of the thermal insulation plate, two inner rods are sleeved inside the movable baffle, a spring is sleeved outside the inner rod, one end of the spring is fixedly connected to the movable baffle, a mounting frame is fixed on the top of the water tank, one side of the mounting frame is fixedly connected to the other end of the spring and one end of the inner rod, an iron block is fixed to one side of the movable baffle, an electromagnet is arranged on one side of the iron block, and the electromagnet is fixedly connected to the mounting frame.

[0015] Furthermore, the detection mechanism includes a cylinder fixed on the top of the support frame, a pressure plate is fixed on the output end of the cylinder, a connector is fixed on the top of the pressure plate, a plurality of probe groups are electrically connected below the connector, the probe groups include power supply probes and measurement probes, the probe groups are fixed through the inside of the pressure plate, a plurality of mounting grooves corresponding to the detection grooves are opened at the bottom of the pressure plate, and a smoke sensor and a thermostat are fixed on the top inner wall of the mounting groove.

[0016] Furthermore, the material receiving mechanism includes a reciprocating screw rotatably connected to one side of the support frame, a one-way gear is installed at one end of the reciprocating screw, a material receiving tray is sleeved on the external thread of the reciprocating screw, a guide rod is sleeved on the other side of the material receiving tray, and one end of the guide rod is fixedly connected to one side of the support frame.

[0017] Furthermore, the cleaning mechanism includes two reciprocating screws that penetrate and are rotatably connected to the inside of the support frame, one end of the two reciprocating screws is equipped with two one-way gears, the external thread sleeve of the two reciprocating screws is provided with a movable frame, the interior of the movable frame is provided with two guide rods, one end of the two guide rods is rotatably connected to the support frame, the movable frame is rotatably connected to a brush roller, the movable frame is fixed with a motor, and the output end of the motor is fixedly connected to one end of the brush roller.

[0018] Furthermore, the driving mechanism includes a second motor fixed to one side of the support frame, a gear is fixed to the output end of the second motor, one side of the gear is meshed with a one-way gear one, and the other side of the gear is meshed with a one-way gear two.

[0019] Furthermore, the cooling mechanism includes an air pump fixed on one side of the support frame, one side of the mounting groove is connected to an air pipe, a plurality of the air pipes are connected to the air pump, and the air pump is connected to the cylinder.

[0020] Furthermore, a controller is fixed on one side of the water tank, and the controller is electrically connected to the air pump, motor 1, thermostat, smoke sensor, cylinder and connector.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention installs an explosion-proof mechanism to control the resistance of thermal runaway through liquid to avoid explosion and air pollution;

[0023] 2. The present invention installs an impact isolation mechanism and sets a detection slot in the insulation material to isolate the thermistor to achieve batch testing in a separate environment, and the thermal runaway resistor is separated from the resistor detection group and falls into the water tank to extinguish, so as to avoid the thermal runaway of the bad resistor during the detection process to ignite the nearby resistors, and also avoid the temperature generated by the thermal runaway resistor to increase the surrounding temperature of other resistors, thereby causing abnormal resistance value of the resistor and affecting the detection data;

[0024] 3. The present invention cleans the detection environment by installing a cleaning mechanism to remove smoke and slag generated by thermal runaway, thereby ensuring the sensitivity of the detection device and the cleanliness of the detection environment, and ensuring the reliability of the detection;

[0025] 4. The present invention cools down the detection environment of the thermal runaway resistor by installing a cooling mechanism, so that the detection temperature drops rapidly, thereby preventing temperature diffusion from affecting the detection data of surrounding resistors and ensuring the accuracy of detection of other resistors. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a thermistor quality inspection device proposed by the present invention from a first perspective.

[0027] Figure 2 This is a schematic diagram of the structure from a second viewing angle of a thermistor quality inspection device proposed by the present invention.

[0028] Figure 3 This is a first-perspective structural schematic diagram of an impact isolation mechanism of a thermistor quality inspection detection device proposed by the present invention.

[0029] Figure 4 This is a schematic structural diagram from a second perspective of an impact isolation mechanism of a thermistor quality inspection detection device proposed by the present invention.

[0030] Figure 5 The present invention provides a schematic diagram of a movable baffle structure of a thermistor quality inspection detection device.

[0031] Figure 6 The present invention provides a schematic diagram of the structure of a detection mechanism of a thermistor quality inspection detection device.

[0032] In the figure: 1. explosion-proof mechanism; 11. water tank; 12. pull-out mesh plate; 13. support frame; 2. impact isolation mechanism; 21. mounting frame; 22. inner rod; 23. spring; 24. movable baffle; 25. electromagnet; 26. iron block; 27. insulation board; 28. detection tank; 3. detection mechanism; 31. cylinder; 32. pressure plate; 33. connector; 34. probe group; 35. mounting tank; 36. thermostat; 37. Smoke sensor; 4. Material receiving mechanism; 41. Reciprocating screw 1; 42. One-way gear 1; 43. Material receiving tray; 44. Guide rod 1; 5. Cleaning mechanism; 51. Reciprocating screw 2; 52. One-way gear 2; 53. Moving frame; 54. Guide rod 2; 55. Brush roller; 56. Motor 1; 6. Driving mechanism; 61. Motor 2; 62. Gear; 7. Cooling mechanism; 71. Air pump; 72. Air pipe. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0036] Example: Refer to Figure 1-Figure 6 : A thermistor quality inspection detection device, comprising an explosion-proof mechanism 1;

[0037] The explosion-proof mechanism controls the resistance of thermal runaway through liquid to avoid explosion and air pollution;

[0038] Also includes:

[0039] The impact isolation mechanism 2 is installed on the explosion-proof mechanism 1 and is used to isolate the impact of the problematic resistor on the detection environment of other resistors during the detection process;

[0040] The impact isolation mechanism isolates the thermistors by setting up a detection slot in the insulation material to achieve batch testing in a separate environment, and the thermal runaway resistors are separated from the resistor detection group and dropped into the water tank to extinguish, so as to avoid the bad resistors from thermal runaway igniting nearby resistors during the detection process, and also to avoid the temperature generated by the thermal runaway resistors causing the surrounding temperature of other resistors to rise, thereby causing abnormal resistance values ​​of the resistors and affecting the detection data;

[0041] The detection mechanism 3 is installed on the explosion-proof mechanism 1 and is used to detect the resistance value of the resistor and obtain the change of the resistor during the detection process;

[0042] The testing agency conducts resistance value testing and environmental monitoring on thermistors to ensure the testing environment of the resistors;

[0043] A material receiving mechanism 4, which is installed on the explosion-proof mechanism 1 and is used to feed the resistors that have been successfully tested;

[0044] The material receiving mechanism unloads the resistors that have passed the test, which makes unloading convenient and shortens the unloading time;

[0045] A cleaning mechanism 5, which is installed on the explosion-proof mechanism 1 and is used to clean the waste residue and smoke generated by the damage;

[0046] The cleaning mechanism cleans the testing environment and removes the smoke and slag generated by thermal runaway to ensure the sensitivity of the testing device and the cleanliness of the testing environment, thereby ensuring the reliability of the test;

[0047] A driving mechanism 6, which is connected to the material receiving mechanism 4 and the cleaning mechanism 5, and is used to drive the material receiving mechanism 4 and the cleaning mechanism 5 to operate;

[0048] The cooling mechanism 7 is installed on the explosion-proof mechanism 1 and is used to cool the detection position of the damaged resistor.

[0049] The cooling mechanism cools down the detection environment of the thermal runaway resistor, causing the detection temperature to drop rapidly, thereby preventing temperature diffusion from affecting the detection data of surrounding resistors and ensuring the accuracy of detection of other resistors.

[0050] The explosion-proof mechanism 1 comprises a water tank 11, the interior of the water tank 11 is filled with liquid, a pull-out mesh plate 12 is slidably mounted on one side of the water tank 11, a support frame 13 is fixed on the top of the water tank 11, and the pull-out mesh plate 12 catches the damaged resistors for easy collection.

[0051] The impact isolation mechanism 2 includes a thermal insulation plate 27 fixed to the inner walls on both sides of the support frame 13, and a plurality of detection grooves 28 are opened through the thermal insulation plate 27. A plurality of movable baffles 24 corresponding to the detection grooves 28 are arranged at the bottom of the thermal insulation plate 27. Two inner rods 22 are sleeved inside the movable baffle 24, and a spring 23 is sleeved outside the inner rod 22. One end of the spring 23 is fixedly connected to the movable baffle 24. A mounting frame 21 is fixed to the top of the water tank 11, and one side of the mounting frame 21 is fixedly connected to the other end of the spring 23 and one end of the inner rod 22. An iron block 26 is fixed to one side of the movable baffle 24, and an electromagnet 25 is arranged on one side of the iron block 26. The electromagnet 25 is fixedly connected to the mounting frame 21.

[0052] The detection mechanism 3 includes a cylinder 31 fixed on the top of the support frame 13, a pressure plate 32 is fixed on the output end of the cylinder 31, a connector 33 is fixed on the top of the pressure plate 32, and a plurality of probe groups 34 are electrically connected below the connector 33. The probe groups 34 include power supply probes and measurement probes. The probe groups 34 are fixed through the inside of the pressure plate 32. A plurality of mounting grooves 35 corresponding to the detection grooves 28 are provided at the bottom of the pressure plate 32, and a smoke sensor 37 and a thermostat 36 are fixed on the top inner wall of the mounting groove 35.

[0053] The material receiving mechanism 4 includes a reciprocating screw 41 rotatably connected to one side of the support frame 13, one end of the reciprocating screw 41 is installed with a one-way gear 42, the external thread of the reciprocating screw 41 is sleeved with a material receiving tray 43, the other side of the material receiving tray 43 is sleeved with a guide rod 44, and one end of the guide rod 44 is fixedly connected to one side of the support frame 13.

[0054] The cleaning mechanism 5 includes a reciprocating screw 51 which is rotatably connected to the inside of the support frame 13, a one-way gear 52 is installed at one end of the reciprocating screw 51, a movable frame 53 is sleeved on the external thread of the reciprocating screw 51, a guide rod 54 is sleeved inside the movable frame 53, one end of the guide rod 54 is rotatably connected to the support frame 13, a brush roller 55 is rotatably connected to the movable frame 53, a motor 56 is fixed to the movable frame 53, and the output end of the motor 56 is fixedly connected to one end of the brush roller 55.

[0055] The driving mechanism 6 includes a second motor 61 fixed to one side of the support frame 13 , and a gear 62 is fixed to the output end of the second motor 61 . One side of the gear 62 is meshed with the one-way gear 1 42 , and the other side of the gear 62 is meshed with the one-way gear 2 52 .

[0056] The cooling mechanism 7 includes an air pump 71 fixed to one side of the support frame 13 , and an air pipe 72 is connected to one side of the mounting groove 35 . A plurality of air pipes 72 are connected to the air pump 71 , and the air pump 71 is connected to the cylinder 31 .

[0057] A controller is fixed on one side of the water tank 11 , and the controller is electrically connected to the air pump 71 , the motor 56 , the thermostat 36 , the smoke sensor 37 , the cylinder 31 and the connector 33 .

[0058] Working principle:

[0059] The resistor is placed inside the detection slot 28 as specified, and the cylinder 31 and the air pump 71 are started by the controller, so that the piston rod of the cylinder 31 pushes the pressure plate 32 and other structures downward to cover the top of the detection slot 28, so that the tops of multiple detection slots 28 are sealed to prevent multiple detection slots 28 from being connected, resulting in temperature series connection affecting the detection data of each resistor;

[0060] After the pressure plate 32 covers the top of the detection tank 28, the thermostat 36 is started to keep the temperature in the detection tank 28 at 25 degrees. 25 degrees is the detection environment standard of the thermistor. The probe group 34 will contact the pin of the resistor to obtain the resistance value of the resistor at this temperature, and then the power probe inputs current to the pin, and the measuring probe measures the resistance value of the pin. As the current gradually increases, the resistance value of the thermistor changes accordingly. The smoke sensor 37 obtains the smoke in the detection tank 28. When the current rises, the thermistor with quality problems cannot withstand the high current and will have thermal runaway. After obtaining the smoke data, the smoke sensor 37 transmits the signal to the controller, and the controller controls the iron block 2 on one side of the movable baffle 24 under the detection tank 28 6 The corresponding electromagnet 25 is started, so that the electromagnet 25 attracts the iron block 26, and the iron block 26 pulls the movable baffle 24 to move so that the bottom of the detection slot 28 is opened. After the resistor is no longer supported, it will fall due to its own gravity and fall out of the detection slot 28 into the water in the water tank 11 below. The water will extinguish it, and the out-of-control resistor will be separated from the detection slot 28 and other resistors being detected. Then, the air pump 71 is started to blow air into the inside of the detection slot 28 through the air pipe 72 to cool the wall of the detection slot 28, so as to prevent the heat of the thermistor with thermal runaway from spreading outward and affecting the detection temperature of other thermistors. The resistance value of the thermistor will change due to the external temperature, which will affect the resistance value test of the current input, thereby ensuring the test environment of other thermistors;

[0061] After the detection is completed, the motor 2 61 is started to drive the gear 62 to rotate forward. The forward rotation of the gear 62 satisfies the direction of the rotation of the one-way gear 1 42 to drive the reciprocating screw 1 41, so that the reciprocating screw 1 41 drives the receiving tray 43 to move to the wire tail of the reciprocating screw 1 41, so that the receiving tray 43 is located at the bottom of the movable baffle 24, and then all the electromagnets 25 are started to suck the iron block 26 to move the movable baffle 24 away, so that the thermistor after the detection is completed falls on the receiving tray 43, and then the reciprocating screw 1 41 continues to rotate to reset the receiving tray 43, and then the resistor is taken out of the receiving tray 43, and then the cylinder 31 is controlled to pull the pressing plate 32 upward to reset;

[0062] The starting motor 2 61 drives the gear 62 to reverse to meet the direction of the one-way gear 2 52 driving the reciprocating screw 2 51 to rotate, so that the moving frame 53 drives the brush roller 55 to move between the pressure plate 32 and the insulation plate 27. The diameter of the brush roller 55 is greater than the height between the pressure plate 32 and the insulation plate 27, so the brush of the brush roller 55 will be inserted into the inside of the detection groove 28 and the installation groove 35. Then the starting motor 1 56 drives the brush roller 55 to rotate. The brush roller 55 separates the smoke and slag generated by thermal runaway in the detection groove 28 and the installation groove 35, ensuring the sensitivity of the detection environment and the detection device and avoiding affecting the detection data. Then the moving frame 53 moves to the tail of the reciprocating screw 2 51 and drives the brush roller 55 to return to the original position to complete the cleaning.

[0063] The electromagnet 25 is turned off to allow the compressed spring 23 to push the movable baffle 24 to return to its original position, and the next round of testing is carried out.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A thermistor quality inspection detection device, including an explosion-proof mechanism, characterized in that: Also includes: Impact isolation mechanism, which is installed on the explosion-proof mechanism and is used to isolate the impact of problematic resistors on other resistor detection environments during the detection process; A detection mechanism, which is installed on the explosion-proof mechanism and is used to detect the resistance value of the resistor and obtain the change of the resistor during the detection process; A material receiving mechanism, which is installed on the explosion-proof mechanism and is used to unload the resistors that have been successfully tested; A cleaning mechanism, which is installed on the explosion-proof mechanism and is used to clean the waste residue and smoke generated by the damage; A driving mechanism, which is connected to the material receiving mechanism and the cleaning mechanism, and is used to drive the material receiving mechanism and the cleaning mechanism to operate; A cooling mechanism, which is installed on the explosion-proof mechanism and is used to cool the detection position of the damaged resistor; The explosion-proof mechanism comprises a water tank, the interior of which is filled with liquid, a drawable mesh plate is slidably mounted on one side of the water tank, and a support frame is fixed on the top of the water tank; The impact isolation mechanism includes a thermal insulation plate fixed to the inner walls on both sides of the support frame, a plurality of detection slots are opened through the thermal insulation plate, a plurality of movable baffles corresponding to the detection slots are arranged at the bottom of the thermal insulation plate, two inner rods are sleeved inside the movable baffle, a spring is sleeved outside the inner rod, one end of the spring is fixedly connected to the movable baffle, a mounting frame is fixed to the top of the water tank, one side of the mounting frame is fixedly connected to the other end of the spring and one end of the inner rod, an iron block is fixed to one side of the movable baffle, an electromagnet is arranged on one side of the iron block, and the electromagnet is fixedly connected to the mounting frame; The detection mechanism includes a cylinder fixed on the top of the support frame, a pressure plate is fixed on the output end of the cylinder, a connector is fixed on the top of the pressure plate, a plurality of probe groups are electrically connected below the connector, the probe groups include power supply probes and measurement probes, the probe groups are fixed inside the pressure plate, a plurality of mounting grooves corresponding to the detection grooves are opened at the bottom of the pressure plate, and a smoke sensor and a thermostat are fixed on the top inner wall of the mounting groove; The material receiving mechanism comprises a reciprocating screw rod rotatably connected to one side of the support frame, one end of the reciprocating screw rod is installed with a one-way gear rod, the external thread of the reciprocating screw rod is sleeved with a material receiving tray, the other side of the material receiving tray is sleeved with a guide rod rod, and one end of the guide rod rod is fixedly connected to one side of the support frame; The cleaning mechanism includes two reciprocating screws that penetrate and are rotatably connected to the inside of the support frame, one end of the two reciprocating screws is equipped with two one-way gears, the external thread sleeve of the two reciprocating screws is provided with a moving frame, the interior of the moving frame is provided with two guide rods, one end of the two guide rods is rotatably connected to the support frame, the moving frame is rotatably connected to a brush roller, the moving frame is fixed with a motor, and the output end of the motor is fixedly connected to one end of the brush roller.

2. A thermistor quality inspection detection device according to claim 1, characterized in that: The driving mechanism comprises a second motor fixed on one side of the support frame, a gear is fixed on the output end of the second motor, one side of the gear is meshed with a first one-way gear, and the other side of the gear is meshed with a second one-way gear.

3. A thermistor quality inspection detection device according to claim 2, characterized in that: The cooling mechanism comprises an air pump fixed on one side of the support frame, one side of the mounting groove is connected with an air pipe, a plurality of the air pipes are connected with the air pump, and the air pump is connected with the air cylinder.

4. A thermistor quality inspection testing device according to claim 3, characterized in that: A controller is fixed on one side of the water tank, and the controller is electrically connected to the air pump, motor 1, thermostat, smoke sensor, cylinder and connector.

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