阅读说明：本技术 一种断路器压力传感器在线检定装置与检定方法 (Online calibrating device and method for circuit breaker pressure sensor ) 是由 辛伟峰 王栋 张道乾 马伟 李志敏 张卓 王磊 王斌 闫庆方 张海星 马德英 于 2019-10-10 设计创作，主要内容包括：本发明涉及一种断路器压力传感器在线检定装置及方法,在待检测的压力传感器所对应的合闸壳体或分闸壳体上安装上专用在线检定装置；待专用在线检定装置安装好后,施力驱动器开始工作,推动检定板向靠近压力传感器方向的一侧移动,此时,标准传感器与压力传感器均会检测到施力驱动器施加给检定板的压力；将标准传感器与压力传感器检测的数据进行对比分析。本发明通过检定组件与施力组件的配合,利用施力组件对标准传感器施压从而对比标准传感器与压力传感器的检测数据,从而实现了对压力传感器的在线检测,非常的方便。(The invention relates to an online calibrating device and a method for a pressure sensor of a circuit breaker, wherein a special online calibrating device is arranged on a closing shell or an opening shell corresponding to the pressure sensor to be detected; after the special online calibrating device is installed, the force application driver starts to work to push the calibrating plate to move towards one side close to the direction of the pressure sensor, and at the moment, the standard sensor and the pressure sensor can detect the pressure applied to the calibrating plate by the force application driver; and comparing the data detected by the standard sensor and the pressure sensor for analysis. The pressure sensor detection device provided by the invention has the advantages that the calibration assembly is matched with the force application assembly, and the force application assembly is utilized to apply pressure to the standard sensor so as to compare the detection data of the standard sensor and the pressure sensor, so that the online detection of the pressure sensor is realized, and the convenience is very high.)

1. an online calibrating device for a circuit breaker pressure sensor is characterized in that the circuit breaker pressure sensor (1) arranged at a moving end or a static end is connected with a closing spring or an opening spring (2), a working pull rod (4) is positioned in the closing spring or the opening spring (2), and the upper end of the working pull rod (4) penetrates through the pressure sensor (1) and then is connected with a fixing plate (5); the method is characterized in that:

The online calibrating device comprises a calibrating plate (7), a standard sensor (6) and a force application assembly;

A standard sensor (6) is fixed on one side of the detection plate (7) facing the pressure sensor (1);

one side of the standard sensor (6) is connected with the other side of the fixing plate (5) through a coupler (8), and the other side of the standard sensor (6) is fixedly connected with one side of the detection plate (7);

the one side that examines and decide board (7) keep away from pressure sensor (1) installs the application of force subassembly, the application of force subassembly action promotes to examine and decides the board and remove to the one side that is close to the pressure sensor direction, detects the pressure of applying for examining and decide the board through standard sensor and pressure sensor.

2. The on-line verification device for the pressure sensor of the circuit breaker according to claim 1, wherein:

and the closing spring or the opening spring (2) is respectively arranged in the closing shell or the opening shell (3).

3. The on-line verification device for the pressure sensor of the circuit breaker according to claim 2, wherein:

The lower end of the working pull rod (4) is fixedly connected with the lower end of the switching-on or switching-off mechanism body (3).

4. The on-line verification device for the pressure sensor of the circuit breaker according to claim 3, wherein:

The force application assembly comprises a force application driver (9) and a reaction plate (10), wherein the force application driver (9) is opposite to the detection plate (7) in the force application direction and pushes the detection plate (7) to act during force application; one side of the force application driver (9) far away from the detection plate (7) is connected with a reaction plate (10), and the reaction plate (10) is fixedly connected with a switching-on or switching-off mechanism body (2) provided with a switching-on spring or a switching-off spring (2).

5. The on-line verification device for the pressure sensor of the circuit breaker according to claim 4, wherein:

The force application driver (9) adopts driving mechanisms such as an air cylinder, a hydraulic cylinder and an electric cylinder to realize the force application of the standard sensor (6).

6. The online calibrating device for the pressure sensor of the circuit breaker according to claim 4 or 5, wherein:

The online calibrating device further comprises a pair of connecting lifting lugs (11) and a pair of connecting pull rods (12), the pair of connecting lifting lugs (11) are symmetrically arranged on the outer side of the brake shell or the brake separating shell (3), each connecting lifting lug (11) is fixed to the lower end of one connecting pull rod (12), and a reaction plate (10) is fixed between the upper ends of the two connecting pull rods (12).

7. the on-line verification device for the pressure sensor of the circuit breaker according to claim 6, wherein:

The upper end and the lower end of the connecting pull rod (12) are both provided with external thread structures, the reaction plate (10) and the connecting lifting lug (11) are both provided with internal thread structures matched with the connecting pull rod (12), and the two ends of the connecting pull rod (12) respectively penetrate through the connecting lifting lug (11) and the reaction plate (10) and then are locked through the locking nut (13).

8. an online verification method for a pressure sensor of a circuit breaker based on the online verification device as claimed in any one of claims 1 to 7, wherein the online verification method comprises the following steps:

Step 1: on-line installation calibrating device

An online detection device is arranged on a switching-on shell or a switching-off shell to which a pressure sensor to be detected belongs, and a standard sensor in the online detection device is connected with a sensor fixing plate for fixing the pressure sensor to be detected through a coupler;

Step 2: the force application component works to push the detection plate to move towards one side close to the direction of the pressure sensor to be detected, and the standard sensor and the pressure sensor to be detected both detect the pressure applied to the detection plate by the force application component and transmit data to the display module for displaying;

and step 3: and comparing and analyzing the pressure data detected by the standard sensor and the pressure sensor to be detected, if the relative difference value of the two data is within an allowable range, the detection result of the pressure sensor to be detected is still accurate, and if the relative difference value exceeds the allowable range, the detection result of the pressure sensor to be detected is inaccurate, and the pressure sensor needs to be replaced.

9. The on-line verification method for circuit breaker pressure sensor according to claim 8, characterized in that

In step 3, the allowable range of the relative difference is 1%.

Technical Field

The invention belongs to the field of circuit breakers, and particularly relates to an online calibrating device and method for a circuit breaker pressure sensor.

background

A circuit breaker (english name: circuit-breaker, circuit breaker) refers to a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and closing, carrying, and opening/closing a current under an abnormal circuit condition for a prescribed time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, and the function of the circuit breaker is equivalent to the combination of a fuse type switch, an over-under-heat relay and the like. Furthermore, no parts need to be changed after breaking the fault current. At present, it has been widely used. Distribution of electricity is an extremely important link in the generation, transmission and use of electricity. The distribution system comprises a transformer and various high-low voltage electrical equipment, and the low-voltage circuit breaker is an electrical appliance with a large using amount.

At present, in the use process of a circuit breaker, in order to ensure smooth switching on and off, a switching-off spring and a switching-on spring need to be divided, and the traditional method is to add a pressure sensor at the switching-off spring and the switching-on spring for detecting the acting force of the switching-off spring and the switching-on spring. However, due to the particularity of the circuit breaker, the circuit breaker is a high-voltage and high-current product, and the sensor belongs to an electronic product, so that the sensor is easily affected by high voltage and high current, and the data detected by the pressure sensor is inaccurate, even the pressure sensor fails, so that whether the circuit breaker successfully completes the switching-on operation or not is not possible, and further the misjudgment of personnel on the current state of the circuit breaker is affected.

In response to this phenomenon, it is necessary to periodically detect the pressure sensors to ensure the accuracy of the measurement results of the pressure sensors. The traditional detection method is that after dismantling pressure sensor from the position that corresponds on the circuit breaker earlier, reuse check out test set to detect pressure sensor, if it is still normal to detect pressure sensor, then adorn pressure sensor again and continue to use on the circuit breaker, if it is unusual or has become invalid to detect pressure sensor testing result, then need to be renewed pressure sensor and install again on the circuit breaker, detect at every turn and all need constantly dismantle and install pressure sensor, operate very loaded down with trivial details, it is not very convenient.

Disclosure of Invention

in order to solve the problems in the prior art, the invention provides an online calibrating device and an online calibrating method for a pressure sensor of a circuit breaker, which can realize the detection of the sensor without disassembling the pressure sensor.

the invention specifically adopts the following technical scheme.

An online calibrating device for a circuit breaker pressure sensor is characterized in that a circuit breaker pressure sensor 1 arranged at a movable end or a static end is connected with a closing spring or an opening spring 2, a working pull rod 4 is positioned in the closing spring or the opening spring 2, and the upper end of the working pull rod 4 penetrates through the pressure sensor 1 and then is connected with a fixed plate 5; the method is characterized in that:

the online calibrating device comprises a calibrating plate 7, a standard sensor 6 and a force application component;

A standard sensor 6 is fixed on one side of the detection plate 7 facing the pressure sensor 1;

One side of the standard sensor 6 is connected with the other side of the fixing plate 5 through a coupler 8, and the other side of the standard sensor 6 is fixedly connected with one side of the assay plate 7;

the one side that the pressure sensor 1 was kept away from to the assay board 7 installs application of force subassembly, application of force subassembly action promotes the assay board and moves to the one side that is close to the pressure sensor direction, detects the pressure of applying for the assay board through standard sensor and pressure sensor.

the present invention further includes the following preferred embodiments.

And the closing spring or the opening spring 2 is respectively arranged in the closing shell or the opening shell 3.

The lower end of the working pull rod 4 is fixedly connected with the lower end of the switching-on or switching-off mechanism body 3.

The force application component comprises a force application driver 9 and a counter force plate 10, wherein the force application driver 9 is opposite to the detection plate 7 in the force application direction and pushes the detection plate 7 to act during force application; one side of the force application driver 9, which is far away from the detection plate 7, is connected with a reaction plate 10, and the reaction plate 10 is fixedly connected with a switching-on or switching-off mechanism body 3 provided with a switching-on spring or a switching-off spring 2.

The force application driver 9 adopts driving mechanisms such as an air cylinder, a hydraulic cylinder and an electric cylinder to realize the force application of the standard sensor 6.

The online calibrating device further comprises a pair of connecting lifting lugs 11 and a pair of connecting pull rods 12, the pair of connecting lifting lugs 11 are symmetrically arranged on the outer side of the brake shell or the brake separating shell 3, each connecting lifting lug 11 is fixed to the lower end of one connecting pull rod 12, and a reaction plate 10 is fixed between the upper ends of the two connecting pull rods 12.

The upper end and the lower end of the connecting pull rod 12 are both provided with external thread structures, the reaction plate 10 and the connecting lifting lug 11 are both provided with internal thread structures matched with the connecting pull rod 12, and the two ends of the connecting pull rod 12 are respectively locked through locking nuts 13 after penetrating through the connecting lifting lug 11 and the reaction plate 10.

The invention also discloses an online detection method of the circuit breaker pressure sensor based on the online detection device, which is characterized by comprising the following steps:

Step 1: on-line installation calibrating device

An online detection device is arranged on a switching-on shell or a switching-off shell to which a pressure sensor to be detected belongs, and a standard sensor in the online detection device is connected with a sensor fixing plate for fixing the pressure sensor to be detected through a coupler;

Step 2: the force application component works to push the detection plate to move towards one side close to the direction of the pressure sensor to be detected, and the standard sensor and the pressure sensor to be detected both detect the pressure applied to the detection plate by the force application component and transmit data to the display module for displaying;

And step 3: and comparing and analyzing the pressure data detected by the standard sensor and the pressure sensor to be detected, if the relative difference value of the two data is within an allowable range, the detection result of the pressure sensor to be detected is still accurate, and if the relative difference value exceeds the allowable range, the detection result of the pressure sensor to be detected is inaccurate, and the pressure sensor needs to be replaced.

in step 3, the allowable range of the relative difference is 1%.

the invention has the advantages that: according to the online detection method, the detection data of the standard sensor and the pressure sensor are compared by matching the detection assembly with the force application assembly and applying pressure to the standard sensor through the force application assembly, so that online detection of the pressure sensor is realized, the pressure sensor does not need to be detached, and the online detection method is very convenient.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic diagram of the on-line calibration apparatus specifically used in the present invention.

Detailed Description

The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention and are not intended to limit the scope of the embodiments described herein.

As shown in fig. 1, a pressure sensor 1 is connected to a closing spring or an opening spring 2, the closing spring or the opening spring 2 is respectively installed in a closing housing or an opening housing 3, the pressure sensor 1 is fixed at a moving end of the closing spring or the opening spring 2, a working pull rod 4 is further fixedly installed in the closing housing or the opening housing 3, the working pull rod 4 is located in the closing spring or the opening spring 2, and the other end of the working pull rod 4 is connected to a sensor fixing plate 5 after passing through the pressure sensor 1.

The on-line verification device comprises

The calibration assembly comprises a calibration plate 7 arranged on one side of the closing shell or the opening shell 3 close to the pressure sensor 1, a standard sensor 6 is further arranged on one side of the calibration plate 7 close to the pressure sensor 1, and the standard sensor 6 is connected with the sensor fixing plate 5 through a connector 8.

a force application assembly comprising a force application driver 9 mounted on the side of the assay plate 7 remote from the reference sensor 6.

The force application driver 9 is fixedly connected with the closing shell or the opening shell 3, and the connection is as follows: one side of the force application driver 9, which is far away from the standard sensor 6, is connected with a reaction plate 10, a pair of connecting lugs 11 are arranged on the outer side of the switching-on shell or the switching-off shell 3, the reaction plate 10 is fixedly connected with the connecting lugs 11 through a pair of connecting pull rods 12, both ends of each connecting pull rod 12 are provided with an external thread structure, the reaction plate 10 and the connecting lugs 11 are provided with internal thread structures matched with the connecting pull rods 12, and both ends of each connecting pull rod 12 penetrate through the connecting lugs 11 respectively and are locked through locking nuts 13 after penetrating through the reaction plate 10. In this configuration, the biasing actuator 9 may be a driving mechanism such as an air cylinder, a hydraulic cylinder, or an electric cylinder to bias the reference sensor 6.

The on-line detection method of the circuit breaker pressure sensor comprises the following steps

Step one, a calibrating device is installed: firstly, a special online calibrating device is installed on a closing shell or an opening shell corresponding to a pressure sensor to be detected.

step two, pressure detection: after the special online calibrating device is installed, the force application driver 9 starts to work to push the calibrating plate 7 to move towards one side close to the direction of the pressure sensor 1, at the moment, the standard sensor 6 and the pressure sensor 1 can detect the pressure applied to the calibrating plate 7 by the force application driver 9, and transmit data to respective display modules for display.

S3: and (4) comparing the results: the data detected by the standard sensor 6 and the pressure sensor 1 are compared and analyzed by a manual or computer terminal, if the two data are the same, the detection result of the pressure sensor 1 is still accurate, and if the two data are different, the detection result of the pressure sensor 1 is inaccurate, and the pressure sensor needs to be replaced.

According to the online detection method, the detection data of the standard sensor and the pressure sensor are compared by matching the detection assembly with the force application assembly and applying pressure to the standard sensor through the force application assembly, so that online detection of the pressure sensor is realized, the pressure sensor does not need to be detached, and the online detection method is very convenient.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.