High-precision general calibration tool for circuit breaker test system

Abstract

The utility model discloses a high-precision general calibration tool for a circuit breaker test system, which comprises a calibration machine table, and a first force calibration group, a second force calibration group, a third force calibration group and a displacement calibration group are arranged on the calibration machine table. The three force calibration sets comprise calibration mechanical sensors which are arranged on a calibration machine table in a sliding mode, buffer protection pieces are arranged between the installation ends of the calibration mechanical sensors and the calibration machine table, and the calibration mechanical sensors of the first force calibration set and the second force calibration set can slide in the X-axis direction. The test end of the first force calibration group and the test end of the second force calibration group are both in the horizontal direction and are opposite, the calibration mechanical sensor of the third force calibration group can slide in the Z-axis direction, and the test end of the first force calibration group and the test end of the second force calibration group are arranged upwards; the displacement calibration group comprises a measuring block. According to the utility model, the mechanical sensor and the displacement sensor in the circuit breaker test equipment can be calibrated, the calibration process is simple, and the efficiency is high.

Description

Technical Field

[0001] The utility model relates to the field of calibration, in particular to a high-precision general calibration tool for a breaker test system. Background Art

[0002] In a low-voltage power distribution system, a breaker is commonly used as a terminal switch or a branch switch to replace the commonly used fuses and knife switches in the past. The breaker has two-stage protection functions of long-time overload and instantaneous short-circuit, and can also be used in combination with leakage protectors, measuring devices, electric operators, etc. A suitable breaker can provide the following effective guarantees: (1) personal safety; (2) protection of electrical lines and equipment; (3) reliable and uninterrupted power supply. Therefore, a breaker with excellent technical indicators is crucial for electrical safety.

[0003] During the production process of a breaker, strict quality control must be carried out. Usually, a special breaker test system is used to detect various indicators of the breaker. For this purpose, a calibration tool must be used to calibrate the test system. The accuracy of the calibration tool directly affects the accuracy of the test system, and thus affects the detection accuracy of the breaker products.

[0004] The existing calibration method is to randomly select a qualified breaker as the calibration tool regularly, which makes the parameters of the calibration tool have great randomness and inconsistency. In addition, when calibrating the force sensor, it is necessary to remove the force sensor from the device, take it to the laboratory for calibration and then reinstall it on the device. The calibration process is very cumbersome and inefficient.

[0005] The existing calibration method for a breaker test system is to randomly select a qualified breaker to calibrate the test system regularly. Since the qualified breakers used to calibrate the test system cannot be completely the same, it is impossible to ensure that the test system has a unified calibration reference. In addition, since the breaker is generally a molded case breaker, its stability is poor, so that the stability of the calibration reference is poor. Using a breaker for calibration does not have a protection function for the force sensor in the test system, and it is easy to damage the force sensor in the test system. Summary of the Utility Model

[0006] To overcome the above-mentioned drawbacks, the purpose of the utility model is to provide a high-precision general calibration tool for a breaker test system, which can calibrate the mechanical sensor and displacement sensor in the breaker test equipment without removing the force sensor from the device, with a simple and efficient calibration process and the ability to protect the force sensor.

[0007] To achieve the above object, one of the technical solutions adopted by the present utility model is: a high-precision general calibration tool for a circuit breaker test system, including a calibration machine table, on which a first force calibration group, a second force calibration group, a third force calibration group and a displacement calibration group are provided; each of the three force calibration groups includes a calibration mechanical sensor slidably arranged on the calibration machine table, and a buffer protection member is arranged between the installation end of the calibration mechanical sensor and the calibration machine table. The calibration mechanical sensors of the first force calibration group and the second force calibration group can both slide along the X-axis direction, and the test ends of the first force calibration group and the second force calibration group are both in the horizontal direction and opposite to each other. The calibration mechanical sensors of the third force calibration group can all slide along the Z-axis direction, and the test ends of the first force calibration group and the second force calibration group are arranged upward; the displacement calibration group includes a mounting plate vertically arranged on the upper end surface of the calibration machine table, and a measuring block is detachably mounted on the mounting plate.

[0008] Preferably, the three force calibration groups are located on the same side of the upper end surface of the calibration machine table. The second force calibration group is located between the first force calibration group and the third force calibration group. The test end of the first force calibration group faces the other side of the calibration machine table, and the test end of the second force calibration group faces the outside of the calibration machine table.

[0009] Preferably, a first horizontal reference plane is provided on the upper end surface of the calibration machine table in the direction of the test end of the first force calibration group, and a first vertical reference plane is provided at the end of the horizontal reference plane. The first horizontal reference plane is located between the first vertical reference plane and the calibration mechanical sensor of the first force calibration group; the measuring block is located between the first horizontal reference plane and the calibration mechanical sensor of the first force calibration group.

[0010] Preferably, a second horizontal reference plane is provided above the calibration mechanical sensor of the second force calibration group, and the second horizontal reference plane is fixedly connected to the calibration machine table.

[0011] Preferably, a receiving groove is provided on the upper end surface of the calibration machine table, and measuring blocks of different sizes are placed in the receiving groove.

[0012] Preferably, a plurality of relief grooves and at least one positioning block are provided on the upper end surface of the calibration machine table. The relief grooves and the positioning block are matched with the test equipment; a plurality of limit grooves are provided on the west end surface of the calibration machine table. The cooperation of the relief grooves, the positioning block and the limit grooves is used to match the test equipment, so that the calibration machine table can be limited on the test equipment and will not move during calibration, and can ensure the smooth progress of the calibration operation.

[0013] Preferably, a cavity is provided inside the calibration machine table, and three connecting plugs are provided on the side wall of the calibration machine table for connecting the calibration force sensor to an external meter head.

[0014] Preferably, the calibration machine platform includes a detachable upper machine platform shell and a lower machine platform shell. The upper machine platform shell and the lower machine platform shell are detachably connected. Upper cavities and lower cavities are respectively arranged on the end faces of the upper machine platform shell and the lower machine platform shell facing each other. The upper cavities and the lower cavities form the cavity, and the three connection plugs are arranged on the side wall of the upper machine platform shell or the side wall of the lower machine platform shell.

[0015] Preferably, the calibration machine platform is made of lightweight alloy. Using lightweight alloy to make the calibration tool, the tool is light and easy to operate. Instead of a plastic shell, the reference is more stable, and the calibration tool has good stability, is lightweight and easy to use.

[0016] Preferably, the buffer protection member is a spring. It is used to protect the calibration force sensor and prevent over-range.

[0017] The beneficial effects of the high-precision general calibration tool for the circuit breaker test system of the present utility model are as follows: integrating a force sensor makes force calibration more convenient and time-saving. There is no need to remove the force sensor from the device, take it to the laboratory for calibration and then reinstall it on the device. The calibration process is simple, overcoming the problems of inconsistent reference, poor stability, and easy damage to the high-precision force sensor in the existing circuit breaker test system calibration tool, and the calibration efficiency is high; a buffer protection member is designed as a protection mechanism for the calibration force sensor, protecting the high-precision force sensor. Description of the Drawings

[0018] Figure 1 is a three-dimensional view of the first angle of this embodiment;

[0019] Figure 2 is a three-dimensional view of the second angle of this embodiment;

[0020] Figure 3 is a three-dimensional view of the upper machine platform shell of this embodiment;

[0021] Figure 4 is a three-dimensional view of the first angle of the lower machine platform shell of this embodiment;

[0022] Figure 5 is a three-dimensional view of the second angle of the lower machine platform shell of this embodiment.

[0023] In the figure:

[0024] 1. Calibration machine platform; 1a. Upper machine platform shell; 1b. Lower machine platform shell; 2. Calibration force sensor; 3. Buffer protection member; 4. Mounting plate; 5. Measuring block; 6. First horizontal reference plane; 7. First vertical reference plane; 8. Second horizontal reference plane; 9. Accommodation groove; 10. Relief groove; 11. Positioning block; 12. Connection plug; 13. Upper cavity; 14. Lower cavity; 15. Limiting groove;

[0025] S1, the first force calibration group; S2, the second force calibration group; S3, the third force calibration group; S4, the displacement calibration group. Detailed implementation

[0026] The following will elaborate on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.

[0027] Refer to Figures 1 - 5 As shown, this embodiment discloses a high-precision general calibration tool for a circuit breaker test system, including a calibration machine table 1. The calibration machine table 1 is made of lightweight alloy. On the calibration machine table 1, there are a first force calibration group S1, a second force calibration group S2, a third force calibration group S3, and a displacement calibration group S4. Each of the three force calibration groups includes a calibration mechanical sensor 2 slidably arranged on the calibration machine table 1. Between the installation end of the calibration mechanical sensor 2 and the calibration machine table 1, there is a buffer protection member 3. In this embodiment, the buffer protection member 3 is a spring. The calibration mechanical sensors 2 of the first force calibration group S1 and the second force calibration group S2 can both slide along the X-axis direction. The test ends of the first force calibration group S1 and the second force calibration group S2 are both in the horizontal direction and are opposite to each other. The calibration mechanical sensor 2 of the third force calibration group S3 can slide along the Z-axis direction. The test ends of the first force calibration group S1 and the second force calibration group S2 are upward. The displacement calibration group S4 includes a mounting plate 4 vertically arranged on the upper end surface of the calibration machine table 1. On the mounting plate 4, a measuring block 5 is detachably mounted. The measuring block 5 is used to calibrate the displacement sensor in the test equipment.

[0028] In this embodiment, the calibration mechanical sensors 2 of the first force calibration group S1, the second force calibration group S2, and the third force calibration group S can achieve sliding through high-precision guide rails.

[0029] The three force calibration groups are located on the same side of the upper end surface of the calibration machine table 1. The second force calibration group S2 is located between the first force calibration group S1 and the third force calibration group S3. The test end of the first force calibration group S1 faces the other side of the calibration machine table 1, and the test end of the second force calibration group S2 faces the outside of the calibration machine table 1.

[0030] On the upper end surface of the calibration machine table 1 in the direction of the test end of the first force calibration group S1, there is a horizontal reference plane 6 as a reference part, which is used as the reference part in the MN / MX displacement test. The calibration mechanical sensor 2 of the first force calibration group S1 serves as a force calibration component and is used for calibrating the MN / MX force sensor in the circuit breaker test equipment.

[0031] One end of the horizontal reference plane 6 is provided with a vertical reference plane 7. The horizontal reference plane 6 is located between the vertical reference plane 7 and the calibration mechanical sensor 2 of the first force calibration group S1; the measuring block 5 is located between the horizontal reference plane 6 and the calibration mechanical sensor 2 of the first force calibration group S1; above the calibration mechanical sensor 2 of the second force calibration group S2, a horizontal reference plane 8 is provided. The horizontal reference plane 8 is fixedly connected to the calibration machine table 1. The horizontal reference plane 8 serves as a reference part for assisting in finding the correct position of the circuit breaker Half moon; the calibration mechanical sensor 2 of the third force calibration group S3 serves as a calibration component for calibrating the Trip force sensor in the circuit breaker test equipment.

[0032] On the upper end surface of the calibration machine table 1, a receiving groove 9 is provided. Different-sized measuring blocks 5 are placed in the receiving groove 9, which is conducive to installing different-sized measuring blocks 5 on the mounting plate 4 to calibrate the displacement sensor on the test equipment.

[0033] On the upper end surface of the calibration machine table 1, a plurality of relief grooves 10 and at least one positioning block 11 are provided. The relief grooves 10 and the positioning block 11 are matched with the test equipment; on the lower end surface of the calibration machine table 1, a plurality of limiting grooves 15 are provided. Inside the calibration machine table 1, a cavity is provided. On the side wall of the calibration machine table 1, three connection plugs 12 are provided for connecting the calibration force sensor to an external meter head.

[0034] The calibration machine table 1 of this embodiment includes a detachable upper machine table shell 1a and a lower machine table shell 1b. The upper machine table shell 1a and the lower machine table shell 1b are detachably connected. On the opposite end faces of the upper machine table shell 1a and the lower machine table shell 1b, upper cavities 13 and lower cavities 14 are respectively provided. The upper cavities 13 and the lower cavities 14 form a cavity. The three connection plugs 12 are provided on the side wall of the upper machine table shell 1a or the side wall of the lower machine table shell 1b.

[0035] This embodiment consists of two parts: force calibration and displacement calibration. The force calibration part consists of a high-precision force sensor, a high-precision guide rail, and a force sensor protection mechanism (i.e., the buffer protection part 3). The force calibration part is to put the calibration tool into the test equipment for operation and compare the force value of the external meter with the force value on the test equipment; the displacement calibration part is to place the displacement reference part on the calibration tool to cause a displacement difference, and record the reading of the displacement sensor on the test equipment and compare it with the true value of the displacement reference part to calibrate the displacement. This high-precision general calibration tool for the circuit breaker test system overcomes problems such as inconsistent benchmarks, poor stability, and easy damage to high-precision force sensors in the existing circuit breaker test system calibration tools. This calibration tool uses a lightweight alloy material, making the calibration tool have good stability, be lightweight, and be easy to use. In addition, by adopting a specially designed force sensor protection mechanism, the force sensor in the test system is effectively protected.

[0036] The above embodiments are only for illustrating the technical concept and features of the present utility model. The purpose is to enable those skilled in the art to understand the content of the present utility model and implement it, and it should not be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A high-precision general calibration tool for a circuit breaker test system, comprising a calibration machine table (1), characterized in that: The calibration machine table (1) is provided with a first force calibration group (S1), a second force calibration group (S2), a third force calibration group (S3) and a displacement calibration group (S4); Each of the three force calibration groups includes a calibration mechanical sensor (2) slidably arranged on the calibration machine table (1). A buffer protection member (3) is arranged between the mounting end of the calibration mechanical sensor (2) and the calibration machine table (1). The calibration mechanical sensors (2) of the first force calibration group (S1) and the second force calibration group (S2) can both slide along the X-axis direction. The test ends of the first force calibration group (S1) and the second force calibration group (S2) are both in the horizontal direction and opposite to each other. The calibration mechanical sensors (2) of the third force calibration group (S3) can all slide along the Z-axis direction. The test ends of the first force calibration group (S1) and the second force calibration group (S2) are arranged upwards; The displacement calibration group (S4) includes a mounting plate (4) vertically arranged on the upper end surface of the calibration machine table (1). A measuring block (5) is detachably mounted on the mounting plate (4).

2. The high-precision general calibration tool for a circuit breaker test system according to claim 1, wherein: The three force calibration groups are located on the same side of the upper end surface of the calibration machine table (1). The second force calibration group (S2) is located between the first force calibration group (S1) and the third force calibration group (S3). The test end of the first force calibration group (S1) faces the other side of the calibration machine table (1). The test end of the second force calibration group (S2) faces the outside of the calibration machine table (1).

3. The high-precision general calibration tool for a circuit breaker test system according to claim 2, characterized in that: A first horizontal reference plane (6) is arranged on the upper end surface of the calibration machine table (1) in the direction of the test end of the first force calibration group (S1). A first vertical reference plane (7) is arranged at the end of the first horizontal reference plane (6). The first horizontal reference plane (6) is located between the first vertical reference plane (7) and the calibration mechanical sensor (2) of the first force calibration group (S1); The measuring block (5) is located between the first horizontal reference plane (6) and the calibration mechanical sensor (2) of the first force calibration group (S1).

4. The high-precision universal calibration tool for the circuit breaker test system according to claim 2, characterized in that: A second horizontal reference plane (8) is arranged above the calibration mechanical sensor (2) of the second force calibration group (S2). The second horizontal reference plane (8) is fixedly connected to the calibration machine table (1).

5. The high-precision general calibration tool for a circuit breaker test system according to claim 1, wherein: A receiving groove (9) is arranged on the upper end surface of the calibration machine table (1). Measuring blocks (5) of different sizes are placed in the receiving groove (9).

6. The high-precision general calibration tool for the circuit breaker test system according to claim 1, characterized in that: A plurality of relief grooves (10) and at least one positioning block (11) are arranged on the upper end surface of the calibration machine table (1). The relief grooves (10) and the positioning block (11) are matched with the test equipment; A plurality of limiting grooves (15) are arranged on the lower end surface of the calibration machine table (1).

7. The high-precision general calibration tool for a circuit breaker test system according to claim 1, characterized in that: A cavity is arranged inside the calibration machine table (1). Three connecting plugs (12) are arranged on the side wall of the calibration machine table (1) for connecting the calibration force sensor to an external meter head.

8. The high-precision general calibration tool for the circuit breaker test system according to claim 7, characterized in that: The calibration machine (1) includes a detachable upper machine housing (1a) and a lower machine housing (1b). The upper machine housing (1a) and the lower machine housing (1b) are detachably connected. Upper cavities (13) and lower cavities (14) are respectively arranged on the end faces of the upper machine housing (1a) and the lower machine housing (1b) facing each other. The upper cavities (13) and the lower cavities (14) form the cavity. The three connection plugs (12) are arranged on the side wall of the upper machine housing (1a) or the side wall of the lower machine housing (1b).

9. The high-precision general calibration tool for the circuit breaker test system according to claim 1, characterized in that: The calibration machine (1) is made of lightweight alloy.

10. The high-precision general calibration tool for a circuit breaker test system according to claim 1, characterized in that: The buffer protection member (3) is a spring.

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