A leakage circuit breaker time delay characteristic testing device

Abstract

The utility model relates to the technical field of leakage circuit breaker test, concretely is a leakage circuit breaker time delay characteristic testing device, the utility model discloses for testing circuit breaker, including the shell, the inside fixed mounting of shell near the middle part position is delayed and is big, the fixed frame is fixedly installed to the shell inner wall and is located the position fixed mounting of delayed and is big above, be provided with conveying mechanism on the shell, and conveying mechanism includes conveying belt one, conveying belt two and conveying belt three, and conveying belt one and conveying belt two all fixed mounting are in the shell outer side wall position, and conveying belt three fixed mounting is in conveying belt one away from conveying belt two one side position, and conveying belt three passes through the shell setting, the utility model releases the laborer from the complicated production procedure, can guarantee the high accuracy of product test, high reliability, thereby strictly control product quality, need not the tedious operation of manual work and can fast batch production, greatly save the manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of residual current circuit breaker testing technology, specifically a device for testing the delay characteristics of residual current circuit breakers. Background Technology

[0002] The short-delay characteristic of a circuit breaker refers to its ability to trip after a certain delay when faced with a short-circuit current. This characteristic is very important for protecting equipment that generates transient overcurrents during startup, such as transformers and large motors, because the current during startup of these devices may far exceed their normal operating current. However, this overcurrent is temporary and does not require immediate circuit disconnection. Currently, in the switchgear industry, time-delay characteristic testing machines are indispensable as a device for testing key technical performance indicators of circuit breakers.

[0003] Common testing equipment involves manually opening and closing circuit breakers, clamping and placing products, observing and recording their tripping time and other delay characteristic data under different current conditions. Existing production technology is not only labor-intensive and inefficient, but also has high production costs. In such a production environment, it is easily affected by human factors, such as the proficiency of the testing personnel and observation errors, so product quality is difficult to guarantee. Utility Model Content

[0004] The purpose of this invention is to provide a device for testing the delay characteristics of a residual current circuit breaker, so as to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions: A time delay characteristic testing device for residual current circuit breakers is used to test circuit breakers. It includes a housing, a time delay plate is fixedly installed near the center inside the housing, a fixing frame is fixedly installed on the inner side wall of the housing above the time delay plate, and a conveying mechanism is provided on the housing. The conveying mechanism includes conveyor belt one, conveyor belt two, and conveyor belt three. Conveyor belt one and conveyor belt two are fixedly installed on the outer side wall of the outer shell. Conveyor belt three is fixedly installed on the side of conveyor belt one away from conveyor belt two, and conveyor belt three is installed through the outer shell. Cooling ducts are fixedly installed on the outer walls of conveyor belt two and conveyor belt three.

[0006] Preferably, each of the two cooling ducts has a plurality of cooling fans installed on its outer wall, and the plurality of cooling fans are distributed at equal distances.

[0007] Preferably, a robotic arm is installed inside the housing and near the conveyor belt, and a gripping head is installed at one end of the robotic arm.

[0008] Preferably, a material distribution mechanism is installed on the outer wall of the second conveyor belt near the side of the robotic arm, and several covers are provided inside the second conveyor belt near the side of the material distribution mechanism.

[0009] Preferably, a lifting mechanism is fixedly installed on the bottom surface of the delay plate, and a gate clamp is provided at the output end of the lifting mechanism and above the conveyor belt.

[0010] Preferably, a feed blocking mechanism is provided inside the conveyor belt near one of the circuit breakers, a control panel is installed on the outer wall of the housing, and a recalibration chain is installed on the upper surface of the delay plate away from the fixed frame.

[0011] The beneficial effects of this utility model are: 1. This utility model liberates workers from complicated production processes by employing various transmission, guidance, positioning, handling, clamping, and detection systems, which can ensure high precision and high reliability of product testing, thereby strictly controlling product quality.

[0012] 2. This utility model utilizes automated mechanisms and testing technology to facilitate convenient switching between various specifications and models, such as single-pole and multi-pole products, and products with different current amperages. It eliminates the need for cumbersome manual operations and enables rapid mass production, greatly saving manufacturing costs and improving production efficiency and product quality. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the structure of the time-delay plate and the lifting mechanism in this utility model; Figure 5 This is a schematic diagram of the structure of the conveyor belt and the lifting mechanism in this utility model; Figure 6 This utility model Figure 5 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of the lifting mechanism and robotic arm in this utility model.

[0014] The attached figures are labeled as follows: 1. Outer shell; 2. Delay plate; 3. Conveyor belt one; 4. Opening and closing clamp; 5. Cover; 6. Cooling duct; 7. Robotic arm; 8. Fixture; 11. Feed blocking mechanism; 12. Lifting mechanism; 13. Conveyor belt two; 14. Cooling fan; 15. Recalibration chain; 16. Material distribution mechanism; 17. Gripper head; 18. Control panel; 19. Circuit breaker; 20. Conveyor belt three. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] A device for testing the time delay characteristics of a residual current circuit breaker, such as Figures 1-7 As shown, the circuit breaker 19 is used for testing and includes a housing 1. A time-delay board 2 is fixedly installed near the center inside the housing 1. A mounting bracket 8 is fixedly installed on the inner side wall of the housing 1 above the time-delay board 2. The mounting bracket 8 is used to suspend current transformers and other testing modules, forming a double-layer test circuit layout with the time-delay board 2 to shorten the wire distance and reduce signal interference. A conveying mechanism is provided on the housing 1 for transporting products. The conveying mechanism includes a first conveyor belt 3, a second conveyor belt 13, and a third conveyor belt 20. The first conveyor belt 3 and the second conveyor belt 13 are both fixedly installed on the outer side wall of the housing 1. The third conveyor belt 20 is fixedly installed on the side of the first conveyor belt 3 away from the second conveyor belt 13 and passes through the housing 1. Cooling ducts 6 are fixedly installed on the outer walls of the second conveyor belt 13 and the third conveyor belt 20.

[0017] Several cooling fans 14 are installed on the outer walls of both cooling ducts 6, and the cooling fans 14 are evenly distributed. The cooling ducts 6 are forced to circulate air through the evenly distributed cooling fans 14 to reduce the surface temperature of the circuit breaker after the test and avoid heat accumulation affecting subsequent tests.

[0018] A robotic arm 7 is installed inside the outer casing 1 and near the side of the conveyor belt 3. A gripping head 17 is installed at one end of the robotic arm 7. The robotic arm 7, in conjunction with the gripping head 17, can grab the product and put it into the test fixture.

[0019] A material sorting mechanism 16 is installed on the outer wall of conveyor belt 2 13 and near the robotic arm 7. The material sorting mechanism 16 is used to sort products, leaving space for gripping. Based on the PLC judgment result, the material sorting mechanism 16 controls the direction of the baffle through the solenoid valve to realize the automatic sorting of good and bad products. Several covers 5 are set inside conveyor belt 2 13 and on one side of the material sorting mechanism 16. The covers 5 cover the top of conveyor belt 2 13 to prevent products from falling during sorting and to isolate noise.

[0020] A lifting mechanism 12 is fixedly installed on the bottom surface of the delay plate 2. The lifting mechanism 12 consists of a cylinder and a guide rail. A gate opening and closing clamp 4 is set at the output end of the lifting mechanism 12 and above the conveyor belt 3. The gate opening and closing clamp 4 is used for automatic gate opening and closing of the product.

[0021] Inside the conveyor belt 3, near one of the circuit breakers 19, there is a feeding blocking mechanism 11. A control panel 18 is installed on the outer wall of the outer casing 1. The control panel 18 integrates a touch screen, which can set the current value and delay threshold, and display the tripping time curve and yield statistics in real time. A calibration chain 15 is installed on the upper surface of the delay plate 2 away from the fixed frame 8. The calibration chain 15 drives the opening and closing clamp 4 to perform a cycle of closing, current flow and tripping operations.

[0022] The testing system of this testing device uses a PLC as its core for computation. Parameters are set and test data is stored through the touch screen on the control panel 18, and the constant current source output automatically adjusts the required test current.

[0023] During use, the circuit breaker 19 to be tested is horizontally fed into the housing 1 via conveyor belt 20 and positioned by the feeding blocking mechanism 11. Then, the gripping head 17 of the robotic arm 7 grabs and transfers it to the opening and closing clamp 4 on conveyor belt 3. After the test is completed, qualified products are output by conveyor belt 2 13, and defective products are kicked into the independent recycling channel by the sorting mechanism 16, such as a pneumatic push rod. The lifting mechanism 12 lifts the opening and closing clamp 4 from below, so that the circuit breaker is in close contact with the test electrode on the delay plate 2. The PLC outputs the set current through the constant current source. The cooling duct 6 uses equidistantly distributed cooling fans 14 to force convection, reducing the surface temperature of the circuit breaker after testing and preventing heat accumulation from affecting subsequent tests.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A time delay characteristic testing device for a residual current circuit breaker (19), comprising a housing (1), characterized in that, A delay plate (2) is fixedly installed inside the outer shell (1) near the middle position. A fixing frame (8) is fixedly installed on the inner side wall of the outer shell (1) above the delay plate (2). A conveying mechanism is provided on the outer shell (1). The conveying mechanism includes a first conveyor belt (3), a second conveyor belt (13), and a third conveyor belt (20). The first conveyor belt (3) and the second conveyor belt (13) are both fixedly installed on the outer side wall of the outer shell (1). The third conveyor belt (20) is fixedly installed on the side of the first conveyor belt (3) away from the second conveyor belt (13), and the third conveyor belt (20) passes through the outer shell (1). Cooling ducts (6) are fixedly installed on the outer walls of the second conveyor belt (13) and the third conveyor belt (20).

2. The device for testing the delay characteristics of a residual current circuit breaker according to claim 1, characterized in that, Both cooling ducts (6) have several cooling fans (14) installed on their outer walls, and the cooling fans (14) are distributed at equal distances.

3. The leakage current circuit breaker delay characteristic testing device according to claim 2, characterized in that, A robotic arm (7) is installed inside the outer casing (1) and near the side of the conveyor belt (3). A gripper (17) is installed at one end of the robotic arm (7).

4. The device for testing the delay characteristics of a residual current circuit breaker according to claim 3, characterized in that, A material distribution mechanism (16) is installed on the outer wall of the second conveyor belt (13) and near the side of the robotic arm (7). Several covers (5) are provided inside the second conveyor belt (13) and on the side of the material distribution mechanism (16).

5. The device for testing the delay characteristics of a residual current circuit breaker according to claim 1, characterized in that, The bottom surface of the delay plate (2) is fixedly installed with a lifting mechanism (12), and the output end of the lifting mechanism (12) and located above the conveyor belt (3) is provided with a gate opening and closing clamp (4).

6. The device for testing the delay characteristics of a residual current circuit breaker according to claim 5, characterized in that, The conveyor belt (3) is provided with a feeding blocking mechanism (11) located near one of the circuit breakers (19) inside. The outer wall of the outer shell (1) is equipped with a control panel (18). The upper surface of the delay plate (2) is equipped with a recalibration chain (15) located away from the fixing frame (8).

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