A resistor flaw detection device used on a production line

Abstract

The present invention discloses a resistor flaw detection device for a production line, comprising: a conveyor belt; a blocking component, a spray component, n positioning components and an air-drying component sequentially arranged along the conveying direction of the conveyor belt; n flaw detection mechanisms located above the positioning components, the flaw detection mechanisms comprising a detection probe, a rotating component for driving the detection probe to rotate, and a lifting component for driving the rotating component to rise and fall; the present invention uses the detection probe to detect resistor flaws, uses the lifting component to drive the detection probe to rise and fall, and enables the detection probe to be attached to the surface of the resistor for detection, uses the rotating component to drive the detection probe to rotate, and enables the detection probe to cover the surface of the resistor, and uses n groups of flaw detection mechanisms to enable the movement trajectory of the detection probe to completely cover the surface of the resistor, thereby realizing resistor flaw detection.

Description

Technical Field

[0001] The invention belongs to the technical field of resistor flaw detection, and in particular relates to a resistor flaw detection device used on a production line. Background Art

[0002] Zinc oxide varistor is a nonlinear resistor composed of zinc oxide as the main material. Its nonlinearity originates from its ceramic grain boundary. It is a very successful electronic ceramic that utilizes the ceramic grain boundary effect. Due to its nonlinear volt-ampere characteristic, zinc oxide varistor exhibits low resistance when subjected to overvoltage, thereby limiting the voltage between the arrester terminals, and exhibits high resistance under normal power frequency voltage. Zinc oxide varistor used in metal oxide arresters (referred to as arresters) is also called zinc oxide resistor sheet.

[0003] Zinc oxide resistors are the core components of metal oxide arresters. To some extent, their electrical properties determine the electrical properties of the arrester. As arresters gradually develop towards ultra-high voltage and tank-type miniaturization, zinc oxide resistors are gradually developing towards low cost, low residual voltage, high energy, high gradient, and AC / DC universality. At present, domestic ultra-high voltage power grid projects urgently need ultra-high voltage arrester products with advanced parameters, excellent performance, and high reliability. Resistors are generally made of powder pressed and sintered. In this process, some resistors will have defects such as cavities inside, which will affect the performance of the resistors. Therefore, after the production of the resistors is completed, it is necessary to perform flaw detection on the inside of the resistors to select the defective resistors inside. The existing practice is usually to use a manual handheld flaw detector to manually perform flaw detection on the resistors.

[0004] A Chinese utility model patent with publication number CN209486093U discloses a resistor specification detection device, including a workbench, a first box body fixedly connected to the left side of the bottom of the workbench, support blocks fixedly connected to the four corners of the bottom of the first box body, a second box body located on the right side of the first box body fixedly connected to the bottom of the workbench, and support legs fixedly connected to the front and rear ends of the right side of the bottom of the workbench.

[0005] This resistor specification detection device still requires manual labor to hold the flaw detector probe and place it on the surface of the resistor, moving it back and forth for detection. During the detection, the probe may not cover some places properly, resulting in missed detection. The detection consistency is poor and it is time-consuming and labor-intensive. Summary of the invention

[0006] The object of the present invention is to provide a resistor flaw detection device for use in a production line to solve at least one of the above-mentioned technical problems.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A resistor flaw detection device for a production line, comprising:

[0009] Conveyor belt, used to convey resistor sheets;

[0010] A blocking component, a spray component, n positioning components and an air drying component are sequentially arranged along the conveying direction of the conveyor belt, wherein n≥2, the blocking component is used to block the resistor; the spray component is used to spray water on the resistor on the conveyor belt to wet the surface of the resistor for easy flaw detection; the positioning component is used to position the resistor; and the air drying component is used to air dry the wetted resistor;

[0011] n flaw detection mechanisms are located above the positioning assembly in a one-to-one correspondence, the flaw detection mechanisms comprising a detection probe, a rotating assembly for driving the detection probe to rotate, and a lifting assembly for driving the rotating assembly to rise and fall;

[0012] Among them, the detection areas of the n detection probes on each of the resistor sheets are coaxially arranged with the resistor sheet, any two adjacent detection areas among the n detection areas on each of the resistor sheets are not spaced apart, the outer radius of the outermost detection area on each of the resistor sheets is not larger than the outer radius of the resistor sheet, and the innermost detection area on each of the resistor sheets is a solid circle.

[0013] The present invention uses a detection probe for resistor flaw detection, uses a lifting assembly to drive the detection probe to lift, so that the detection probe can be close to the surface of the resistor for detection, and uses a rotating assembly to drive the detection probe to rotate so that the detection probe can cover the surface of the resistor. By setting n groups of flaw detection mechanisms, the movement trajectory of the detection probe can completely cover the surface of the resistor, thereby realizing resistor flaw detection. When multiple groups of flaw detection mechanisms are set, the movement radii of the detection probes of the multiple groups of flaw detection mechanisms are different, so that the surface of the resistor is completely covered by the detection probe.

[0014] Specifically, the lifting assembly includes a first mounting cylinder, a second mounting cylinder and a first cylinder. The first mounting cylinder is installed above the corresponding positioning assembly in the vertical direction, the second mounting cylinder is slidably installed in the first mounting cylinder, the first cylinder is installed in the first mounting cylinder and is connected to the second mounting cylinder to drive the second mounting cylinder to rise and fall. The first mounting cylinder is used to install the second mounting cylinder and the first cylinder, and the first cylinder is used to drive the second mounting cylinder to rise and fall along the length direction of the first mounting cylinder, so that the detection probe can be lifted and lowered, so that the detection probe can be attached to the surface of the resistor for flaw detection.

[0015] Specifically, the rotating assembly includes a rotating motor, a first connecting rod and a mounting plate. The rotating motor is vertically installed in the second mounting tube. The end of the output shaft of the rotating motor is coaxially connected to the first connecting rod, and the mounting plate is coaxially fixed to the bottom end of the first connecting rod. The detection probe is fixed to the bottom surface of the mounting plate. The rotating motor is arranged to drive the mounting plate to rotate, and then drive the detection probe to rotate, so that the detection probe can move along a circular trajectory along the surface of the resistor sheet. The area covered by the detection probe on the surface of the resistor sheet each time is circular or annular.

[0016] Furthermore, the rotating motor and the first connecting rod are fixedly connected via a connecting block, and the connecting block is rotatably connected to the inner wall of the second mounting tube via a bearing. The connecting rod and the second mounting tube are rotatably connected via the provided connecting block, thereby enhancing the stability of the movement of the detection probe.

[0017] Specifically, the positioning assembly includes a second cylinder, a second connecting rod and a V-shaped baffle for positioning the resistor. The second cylinder is installed on one side of the conveyor belt. The second cylinder is connected to the V-shaped baffle through the second connecting rod to drive the V-shaped baffle to rise and fall. The V-shaped baffle is located above the conveyor belt, and its opening is away from the transmission direction of the conveyor belt. When the resistor moves to the bottom of the mounting plate, it is stuck by the V-shaped baffle to facilitate subsequent flaw detection.

[0018] Specifically, the blocking assembly includes a third cylinder installed on one side of the conveyor belt and a blocking needle fixed to the push rod of the third cylinder. The third cylinder is used to drive the blocking needle to extend and retract. The blocking needle is arranged in a horizontal direction and is perpendicular to the direction of movement of the resistor. When the blocking needle is extended, it can block the resistor and prevent it from moving forward. After the blocking needle is retracted, the resistor can continue to move forward and move to the V-shaped baffle.

[0019] Specifically, the spray assembly includes a spray head, the spray direction of the spray head is toward the conveyor belt, and the spray head is used to spray water toward the surface of the resistor to make the surface of the resistor wet, which is convenient for flaw detection.

[0020] Specifically, the air-drying component includes an air nozzle, the blowing direction of the air nozzle is toward the conveyor belt, the air nozzle is connected to an external air source, and the arranged air nozzle is used to blow away the water on the resistor sheet and the water on the conveyor belt passing under the air nozzle.

[0021] Furthermore, a water trough is provided under the conveyor belt, and a water pump is provided at the bottom of the water trough. The water outlet of the water pump is connected with the spray head to spray the water in the water trough from the spray head; the spray head and the air nozzle are both located above the water trough. The water trough is provided for storing water, and the water pump is used to pump the water in the water trough to the spray head. The water trough is also used to catch the water sprayed from the spray head and the water dripping on the conveyor belt. The air nozzle also blows the water on the resistor and the conveyor belt into the water trough.

[0022] Furthermore, the radius of the resistor sheet is R, and the diameter of the detection probe is D, wherein D≤2R, (n-1)D<R≤nD.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention uses a detection probe for resistor flaw detection, uses a lifting assembly to drive the detection probe to lift, so that the detection probe can be close to the surface of the resistor for detection, and uses a rotating assembly to drive the detection probe to rotate so that the detection probe can cover the surface of the resistor. By setting n groups of flaw detection mechanisms, the movement trajectory of the detection probe can completely cover the surface of the resistor, thereby realizing resistor flaw detection. When multiple groups of flaw detection mechanisms are set, the movement radii of the detection probes of the multiple groups of flaw detection mechanisms are different, so that the surface of the resistor is completely covered by the detection probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a resistor flaw detection device used on a production line in this embodiment;

[0026] Figure 2 This is a cross-sectional view of the flaw detection mechanism in this embodiment;

[0027] Figure 3 This is a diagram showing the relationship between the positioning assembly and the conveyor belt position in this embodiment;

[0028] In the figure: 1. frame; 2. mounting plate; 3. conveyor belt; 4. blocking assembly; 401. third cylinder; 402. stopper needle; 5. spray assembly; 501. spray head; 502. water tank; 6. positioning assembly; 601. second cylinder; 602. second connecting rod; 603. V-shaped baffle; 7. air drying assembly; 701. air nozzle; 8. flaw detection mechanism; 801. detection probe; 802. first mounting tube; 803. second mounting tube; 804. first cylinder; 805. rotating motor; 806. first connecting rod; 807. mounting plate; 808. connecting block; 809. bearing. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1 As shown, this embodiment provides a resistor film flaw detection device for use on a production line, including a conveyor belt 3, a blocking component 4, a spray component 5, n positioning components 6, an air-drying component 7 and n flaw detection mechanisms 8, the blocking component 4, the spray component 5, the positioning component 6 and the air-drying component 7 are arranged in sequence along the conveying direction of the conveyor belt 3, the conveyor belt 3 is installed through a frame 1, and a horizontal mounting plate 2 is arranged above the conveyor belt 3 for installing the flaw detection mechanism 8.

[0031] Specifically, the blocking assembly 4 includes a third cylinder 401 installed on one side of the conveyor belt 3 and a blocking needle 402 fixed to the push rod of the third cylinder 401. The third cylinder 401 is fixed on the frame 1. The third cylinder 401 is used to drive the blocking needle 402 to extend and retract. The blocking needle 402 is arranged in a horizontal direction and is perpendicular to the direction of movement of the resistor. When the blocking needle 402 is extended, it can block the resistor and prevent it from moving forward. After the blocking needle 402 is retracted, the resistor can continue to move forward.

[0032] Specifically, Figure 3 As shown, the positioning assembly 6 includes a second cylinder 601, a second connecting rod 602 and a V-shaped baffle 603 for positioning the resistor. The second cylinder 601 is installed on one side of the conveyor belt 3. The second cylinder 601 is connected to the V-shaped baffle 603 through the second connecting rod 602 to drive the V-shaped baffle 603 to rise and fall. The V-shaped baffle 603 is located above the conveyor belt 3, and its opening is away from the transmission direction of the conveyor belt 3. When the resistor moves to the V-shaped baffle 603, it is stuck by the V-shaped baffle 603 to facilitate subsequent flaw detection.

[0033] Specifically, the spray assembly 5 includes a spray head 501, which is fixed on the frame 1. The spray direction of the spray head 501 is toward the conveyor belt 3. A water tank 502 is provided below the conveyor belt 3. The water tank 502 is rectangular and has an opening at the top. The length direction of the water tank 502 is consistent with the length direction of the conveyor belt 3. A water pump is provided at the bottom of the water tank 502. The water outlet of the water pump is connected with the spray head 501 through a water pipe to spray the water in the water tank 502 from the spray head 501; the spray head 501 is used to spray water toward the surface of the resistor to moisten the surface of the resistor for easy flaw detection; the spray head 501 is located above the water tank 502. The water tank 502 is provided for storing water, and the water in the water tank 502 is pumped to the spray head 501 in cooperation with the water pump. The water tank 502 is also used to catch the water sprayed by the spray head 501 and the water dripping on the conveyor belt 3.

[0034] Specifically, the air-drying component 7 includes an air nozzle 701, which is fixed by the frame 1. The blowing direction of the air nozzle 701 is toward the conveyor belt 3. The air nozzle 701 is connected to the external air source. The air nozzle 701 is located above the water tank 502. The air nozzle 701 blows the water on the resistor and the conveyor belt 3 into the water tank 502.

[0035] The flaw detection mechanisms 8 are located above the V-shaped baffles 603 in a one-to-one correspondence, such as Figure 2 As shown, the flaw detection mechanism 8 includes a detection probe 801, a rotating component for driving the detection probe 801 to rotate, and a lifting component for driving the rotating component to lift and lower. The detection probe 801 is a detection probe 801 of an ultrasonic flaw detector, which performs flaw detection on the inside of the resistor sheet by ultrasonic waves, wherein the detection areas of n detection probes 801 on each resistor sheet are coaxially arranged with the resistor sheet, any two adjacent detection areas among the n detection areas on each resistor sheet are not spaced apart, the outer radius of the outermost detection area on each resistor sheet is not greater than the outer radius of the resistor sheet, preferably, the outer radius of the outermost detection area on each resistor sheet is equal to the outer radius of the resistor sheet, and the innermost detection area on each resistor sheet is a solid circle.

[0036] The lifting assembly includes a first mounting cylinder 802, a second mounting cylinder 803 and a first cylinder 804. The first mounting cylinder 802 is installed above its corresponding V-shaped baffle 603 in the vertical direction. Specifically, the first mounting cylinder 802 is installed on the bottom surface of the mounting plate 2, and the second mounting cylinder 803 is slidably installed in the first mounting cylinder 802. The first cylinder 804 is installed in the first mounting cylinder 802 and connected to the second mounting cylinder 803 to drive the second mounting cylinder 803 to rise and fall. The first mounting cylinder 802 is used to install the second mounting cylinder 803 and the first cylinder 804. The first cylinder 804 is used to drive the second mounting cylinder 803 to rise and fall along the length direction of the first mounting cylinder 802, so that the detection probe 801 can be lifted and lowered, so that the detection probe 801 can be attached to the surface of the resistor for flaw detection.

[0037] Specifically, the rotating assembly includes a rotating motor 805, a first connecting rod 806 and a mounting plate 807. The rotating motor 805 is vertically mounted in the second mounting tube 803. The output shaft end of the rotating motor 805 is coaxially connected to the first connecting rod 806. The bottom end of the first connecting rod 806 is coaxially fixed with the mounting plate 807. The size of the mounting plate 807 is consistent with that of the resistor. The mounting plate 807 is located directly above the V-shaped baffle 603. When the V-shaped baffle 603 fixes the resistor, the mounting plate 807, the first connecting rod 806 and the rotating motor 805 are vertically mounted in the second mounting tube 803. The output shaft of the rotating motor 805 is concentric with the resistor sheet; the detection probe 801 is fixed to the bottom surface of the mounting plate 807, and the rotating motor 805 is used to drive the mounting plate 807 to rotate, thereby driving the detection probe 801 to rotate, so that the detection probe 801 can move along a circular trajectory along the surface of the resistor sheet, and the area covered by the detection probe 801 on the surface of the resistor sheet each time is circular or ring-shaped; the radius of the resistor sheet is R, in centimeters, and the diameter of the detection probe 801 is D, in centimeters, wherein D≤2R, (n-1)D<R≤nD.

[0038] Furthermore, the rotating motor 805 is fixedly connected to the first connecting rod 806 via a connecting block 808, and the connecting block 808 is rotatably connected to the inner wall of the second mounting cylinder 803 via a bearing 809. The connecting block 808 is set to rotatably connect the connecting rod to the second mounting cylinder 803, thereby enhancing the stability of the movement of the detection probe 801.

[0039] The present invention uses a detection probe 801 for resistor flaw detection, and uses a lifting component to drive the detection probe 801 to rise and fall, so that the detection probe 801 can be close to the surface of the resistor for detection. The rotating component is used to drive the detection probe 801 to rotate, so that the detection probe 801 can cover the surface of the resistor. By setting n groups of flaw detection mechanisms 8, the movement trajectory of the detection probe 801 can completely cover the surface of the resistor, thereby realizing resistor flaw detection. When multiple groups of flaw detection mechanisms 8 are set, the movement radii of the detection probes 801 of the multiple groups of flaw detection mechanisms 8 are different, so that the surface of the resistor is completely covered by the detection probe 801.

[0040] Working principle: The resistor is transported by the conveyor belt 3. When the resistor moves to the V-shaped baffle 603, it is stuck by the V-shaped baffle 603. The lifting component drives the detection probe 801 to descend until the detection probe 801 is pressed against the surface of the resistor. The rotating component drives the detection probe 801 to rotate. The detection probe 801 sticks to the surface of the resistor to detect the place where it passes. After the detection component rotates one circle, the detection ends; the second cylinder 601 is started to drive the V-shaped baffle 603 to rise. Because the resistor is pressed against by the detection probe 801, the resistor is separated from the V-shaped baffle 603; the lifting component drives the detection probe 801 to rise again, and the conveyor belt 3 drives the resistor to continue to move to the next V-shaped baffle 603, and it is detected again by the detection probe 801 here. The movement radius of the detection probe 801 here is different from the movement radius of the previous detection probe 801, and the positions covered by the two on the surface of the resistor are also different. Through multiple detections, the surface of the resistor can be detected.

[0041] It should be noted that although the present invention is disclosed as above by specific embodiments, the above embodiments are not intended to limit the present invention. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A resistor flaw detection device used in a production line, characterized in that: include: Conveyor belts; A blocking component, a spray component, n positioning components and an air drying component are sequentially arranged along the conveying direction of the conveyor belt, wherein n≥2; n flaw detection mechanisms are located above the positioning assembly in a one-to-one correspondence, the flaw detection mechanisms include a detection probe, a rotating assembly for driving the detection probe to rotate, and a lifting assembly for driving the rotating assembly to lift and lower, the detection probe can move along a circular trajectory along the surface of the resistor sheet, and the area covered by the detection probe on the surface of the resistor sheet each time is circular or annular; The detection areas of the n detection probes on each resistor sheet are coaxially arranged with the resistor sheet, any two adjacent detection areas among the n detection areas on each resistor sheet are not arranged at intervals, the outer radius of the outermost detection area on each resistor sheet is not greater than the outer radius of the resistor sheet, and the innermost detection area on each resistor sheet is a solid circle. When multiple groups of the flaw detection mechanisms are provided, the movement radii of the detection probes of the multiple groups of the flaw detection mechanisms are different; The positioning assembly includes a second cylinder, a second connecting rod, and a V-shaped baffle for positioning the resistor, wherein the second cylinder is installed on one side of the conveyor belt, and the second cylinder is connected to the V-shaped baffle through the second connecting rod to drive the V-shaped baffle to rise and fall, and the V-shaped baffle is located above the conveyor belt, and its opening is away from the transmission direction of the conveyor belt; The resistor is transported by the conveyor belt. When the resistor moves to the V-shaped baffle, it is stuck by the V-shaped baffle. The lifting assembly drives the detection probe to descend until the detection probe is pressed against the surface of the resistor. The rotating assembly drives the detection probe to rotate. The detection probe sticks to the surface of the resistor to detect the place where it passes. After the detection probe rotates one circle, the detection ends. The second cylinder is started to drive the V-shaped baffle to rise. Because the resistor is pressed against by the detection probe, the resistor is separated from the V-shaped baffle. The lifting assembly drives the detection probe to rise again. The conveyor belt drives the resistor to continue to move to the next V-shaped baffle and is detected again by the detection probe here. The movement radius of the detection probe here is different from the movement radius of the previous detection probe, and the positions covered by the two on the resistor surface are also different. Through multiple detections, the surface of the resistor can be detected.

2. The resistor flaw detection device for a production line according to claim 1 is characterized in that: The lifting assembly includes a first mounting cylinder, a second mounting cylinder and a first cylinder. The first mounting cylinder is installed above the corresponding positioning assembly in the vertical direction, the second mounting cylinder is slidably installed in the first mounting cylinder, and the first cylinder is installed in the first mounting cylinder and connected to the second mounting cylinder to drive the second mounting cylinder to rise and fall.

3. The resistor flaw detection device for a production line according to claim 2 is characterized in that: The rotating assembly includes a rotating motor, a first connecting rod and a mounting plate. The rotating motor is vertically installed in the second mounting tube. The end of the output shaft of the rotating motor is coaxially connected to the first connecting rod, the bottom end of the first connecting rod is coaxially fixed to the mounting plate, and the detection probe is fixed to the bottom surface of the mounting plate.

4. The resistor flaw detection device for a production line according to claim 3 is characterized in that: The rotating motor is fixedly connected to the first connecting rod via a connecting block, and the connecting block is rotatably connected to the inner wall of the second mounting cylinder via a bearing.

5. The resistor flaw detection device for a production line according to claim 1 is characterized in that: The blocking assembly includes a third cylinder installed on one side of the conveyor belt and a blocking needle fixed to a push rod of the third cylinder.

6. The resistor flaw detection device for a production line according to claim 1, characterized in that: The spray assembly includes a spray head, and the spray direction of the spray head is toward the conveyor belt.

7. The resistor flaw detection device for a production line according to claim 6, characterized in that: The air-drying component includes an air nozzle, the air blowing direction of the air nozzle is toward the conveyor belt, and the air nozzle is connected to an external air source.

8. The resistor flaw detection device for a production line according to claim 7, characterized in that: A water tank is provided below the conveyor belt, a water pump is provided at the bottom of the water tank, and a water outlet of the water pump is connected with the spray head to spray the water in the water tank from the spray head; the spray head and the air nozzle are both located above the water tank.

9. The resistor flaw detection device for a production line according to claim 1, characterized in that: The radius of the resistor sheet is R, and the diameter of the detection probe is D, wherein D≤2R, (n-1)D<R≤nD.

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