CN113138069A

CN113138069A - Mechanical indication electric meter main shaft fastening detection device

Info

Publication number: CN113138069A
Application number: CN202110369857.0A
Authority: CN
Inventors: 张乃龙; 刘熙辰
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-07-20

Abstract

The invention relates to a mechanical indication electric meter pointer main shaft fastening detection device, which is used for detecting the tightness of a mechanical indication electric meter pointer main shaft. The fixed plate is fixed on the base to form a main body support of the detection device, and the ammeter clamping device is used for isolating vibration and fixing the position of the ammeter and comprises a damping shock absorber, a supporting plate, a positioning tool and a cylinder. The automatic knocking device comprises a knocking hammer, and the knocking hammer is used for continuously knocking the side face of the electric meter. Automatic data acquisition device is used for automatic acquisition ammeter pointer vibration amplitude, including support, little damping bumper shock absorber, sensor fixed plate, laser displacement sensor, and laser displacement sensor gathers ammeter pointer vibration amplitude, and the amplitude of gathering compares with the standard value after the analysis, can be used for judging the elasticity condition of main shaft fastening.

Description

Mechanical indication electric meter main shaft fastening detection device

Technical Field

The invention belongs to the field of mechanical indication electric meter manufacturing, and relates to a mechanical indication electric meter pointer main shaft fastening detection device which is mainly used for detecting the tightness of a mechanical indication electric meter pointer main shaft.

Technical Field

The mechanical indicating electric meter is an electric meter which uses electromagnetic force to make the movable part of the measuring mechanism produce mechanical action so as to reflect the measured size. The mechanical pointer electricity meter is widely used due to its strong adaptability and high stability. The fastening of the pointer main shaft directly influences the stability and reliability of the pointer during measurement. If the pointer spindle is fastened too tightly, the end part of the spindle is likely to be directly crushed, and the ammeter cannot work normally; if the main shaft is fastened too loosely, the main shaft is easy to jump out of the bracket when the ammeter is impacted or vibrates too much, or the jitter amplitude of the pointer is large, so that the measurement precision is influenced. Whether the main shaft fastening is suitable is mainly judged through the manual work to strike the ammeter side at present and observe pointer swing and vibration amplitude, so the turnover fastening detects that the ability and the experience requirement to personnel are higher, and detects and varies from person to person, and the error is big. Therefore, the design of the device with the automatic detection function has important significance in reducing personnel dependence and increasing production efficiency and product stability.

Disclosure of Invention

The invention aims to improve the reliability and stability of ammeter detection, solve the problem of mechanical indication of ammeter pointer spindle fastening detection, and design an automatic detection device.

The automatic detection device mainly comprises a main body support, an electric meter clamping device, an automatic knocking device and an automatic data acquisition device. In order to achieve the purpose, the technical scheme of the invention is as follows:

the fixed plate (2) is fixed on the base (1) to form a main body bracket of the detection device,

ammeter clamping device is used for the vibration isolation and fixed ammeter position, including damping bumper shock absorber (3), layer board (4), location frock (11) and cylinder (12), four angles of layer board (4) are fixed in on fixed plate (2) through installing damping bumper shock absorber (3), on location frock (11) and cylinder (12) are fixed in layer board (4), cylinder (12) are used for exerting pressure and make the ammeter hug closely (11) in the location frock. The positioning tool can be replaced according to the specification of the electric meter.

The automatic knocking device comprises a knocking hammer (6), and the knocking hammer (6) is arranged on the supporting plate (4) and used for continuously knocking the side face of the electric meter.

The automatic data acquisition device is used for automatically acquiring the vibration amplitude of the pointer of the electric meter and comprises a bracket (5), a small damping shock absorber (7), a sensor fixing plate (8) and a laser displacement sensor (9); the laser position sensor (9) is sequentially arranged on the support (5) through the sensor fixing plate (8) and the small damping shock absorber (7), the support (5) is fixedly arranged on the fixing plate (2), the laser displacement sensor (9) collects the vibration amplitude of the pointer of the electric meter, the collected amplitude is compared with a standard value after analysis, and the tightness of the fastening of the spindle can be judged.

Advantageous effects

The invention realizes the function of detecting the tightness of the main shaft according to the vibration condition of the pointer of the ammeter, solves the problem of detection mainly depending on manual experience at present, and improves the detection stability and consistency.

Drawings

FIG. 1 is an isometric view of the invention in its entirety

FIG. 2 is an isometric view of the inventive work table

In the figure, the device comprises a base 1, a base 2, a fixing plate 3, a damping shock absorber 4, a supporting plate 5, a bracket 6, a knocking hammer 7, a small damping shock absorber 8, a sensor fixing plate 9, a laser displacement sensor 10, an ammeter 11, a positioning tool 12 and a cylinder,

Detailed Description

The device finishes the working process in three steps, namely firstly placing the ammeter on a positioning tool, then starting the air cylinder to clamp the ammeter on the tool, finally starting the knocking hammer to knock the side face of the ammeter continuously, and meanwhile, carrying out data acquisition and analysis by the laser displacement sensor. The following is a detailed description based on the overall operation.

An ammeter 10 to be detected is arranged on a positioning tool 11, two sides of the ammeter 10 are close to positioning side faces of the positioning tool 11, a boss at the lower part of the positioning tool 11 is arranged in a clamping groove of a supporting plate 4 and is fixed on the supporting plate 4, four corners of the supporting plate 4 are installed on a fixing plate 2 through damping shock absorbers 3, the supporting plate 4 is enabled to be isolated from vibration of a base 1, the fixing plate 2 is fixed on the base 1, a cylinder 12 is installed on the supporting plate 4, the cylinder 12 is pushed out to clamp the ammeter 10 on the positioning tool 11 after being started, a knocking hammer 7 is installed on the supporting plate 4, the side face of the ammeter 10 is knocked at a fixed frequency after being electrified, the lower end of a support 5 is installed on the fixing plate 2, the upper end of the support is connected with a sensor fixing plate 8 through a small damping shock absorber 7, a laser displacement sensor 9 is installed on the sensor fixing plate 8, the sensor 9 is enabled to be separated from the support 5 in vibration, the pointer amplitude of the ammeter 10 is collected by the sensor 9, and the tightness state of a spindle is judged after being analyzed by a computer.

Claims

1. The utility model provides a mechanical type instructs ammeter main shaft fastening detection device which characterized in that: the damping shock absorber comprises a base (1), a fixing plate (2), a damping shock absorber (3), a supporting plate (4), a support (5), a knocking hammer (6), a small damping shock absorber (7), a sensor fixing plate (8), a laser displacement sensor (9), an electric meter (10), a positioning tool (11) and a cylinder (12); an ammeter (10) is arranged on a positioning tool (11), two sides of the ammeter (10) are close to the positioning side face of the positioning tool (11), a boss at the lower part of the positioning tool (11) is arranged in a clamping groove of a supporting plate (4) and fixed on the supporting plate (4), four corners of the supporting plate (4) are arranged on a fixing plate (2) through damping shock absorbers (3), the supporting plate (4) is isolated from the base (1) in a vibration mode, the fixing plate (2) is fixed on the base (1), an air cylinder (12) is arranged on the supporting plate (4), the air cylinder (12) pushes out the clamping ammeter (10) to be clamped on the positioning tool (11) after starting, a knocking hammer (6) is arranged on the supporting plate (4), the side face of the ammeter (10) is knocked at a fixed frequency after electrification, the lower end of a support (5) is arranged on the fixing plate (2), the upper end of the support is connected with a sensor fixing plate (8) through a small damping shock absorber (7), and a laser displacement sensor (9) is arranged on the sensor fixing plate (8), the sensor (9) and the bracket (5) are separated in a vibration mode, and the laser displacement sensor (9) is used for measuring the vibration amplitude of the pointer of the electricity meter.