CN103217245A - Clamping force measurement device used for isolating switch - Google Patents

Abstract

The invention relates to a clamping force measuring device for an isolating switch, which comprises a first extruding part and a second extruding part, each extruding part is a cylindrical body with a bow-shaped cross section, and the bowstring parts of the two extruding parts are A pressure sensor is arranged opposite to each other, and the two force-bearing ends of the pressure sensor are respectively fixedly connected with the first extruding part and the second extruding part, and the signal output end of the pressure sensor is connected with a pressure display. The device has simple structure and high reliability, so that the user can directly read the pressure value through the display, which facilitates the operation and improves the measurement efficiency and accuracy.

Description

Clamping force measuring device for isolating switch

technical field

The invention belongs to the technical field of high-voltage electrical appliances, and relates to a clamping force measuring device for a scissor-type isolating switch and a clamp-type isolating switch.

Background technique

Due to the rapid development of the national electric power industry, the output of isolating switches has increased significantly, and the original clamping force measuring device cannot meet the measurement requirements. However, in the actual operation of high-voltage AC isolating switches, it is necessary to ensure reliable contact between the moving and static contacts. It is required that the moving contact has a sufficient force on the static contact, which is an important indicator to measure the reliable contact of the moving and static contact. According to the requirements of the user and the design, the magnitude of the force must be tested before the product leaves the factory to meet the product performance requirements. At present, the clamping force testing devices commonly used for scissor-type isolating switches and clamp-testing isolating switches generally have complex structures, insufficient measurement accuracy, low reliability, and inconvenient operation. For example, the existing Chinese patent with the authorized announcement number CN101710010B titled "Clamping Force Test Device for Dynamic and Static Contacts of Disconnectors" discloses a clamping force test device for dynamic and static contacts of disconnectors. The measurement process of this device is relatively complicated. The operation is inconvenient and the measurement efficiency is low, which is an urgent problem to be solved by the clamping force measuring device for disconnectors.

Contents of the invention

The object of the present invention is to provide a clamping force measuring device for a disconnector to solve the problems of complicated measuring process, inconvenient operation and low measuring efficiency of the clamping force measuring device.

In order to achieve the above object, the solution of the present invention is: a clamping force measuring device for a disconnector, comprising a first extruding part and a second extruding part, each extruding part is a cylinder with an arcuate cross section, The bowstring parts of the two extruding parts are arranged oppositely, and a pressure sensor is arranged between them. The two force-bearing ends of the pressure sensor are respectively fixedly connected with the first extruding part and the second extruding part. With pressure monitor.

The pressure sensor, the first extruding part and the second extruding part are fixed by screws.

Both ends of the first extruding part are provided with limiting blocks for limiting the axial movement of the second extruding part along the first extruding part.

When the isolating switch clamping force measuring device of the present invention is in use, when the isolating switch is closed, the movable contacts on both sides generate a pair of acting forces with the same size and opposite directions on the two extruding parts at the same time, and this acting force is transmitted to the On the pressure sensor connected to the two extrusion parts, the pressure sensor transmits the value to the pressure display through the data line to display the pressure value in real time. The installation or testing personnel can adjust the corresponding adjustment device according to the displayed force value, and then meet the design requirements. clamping force. The device of the invention has simple structure and high reliability, so that the user can directly read the pressure value through the display, which facilitates the operation and improves the measurement efficiency and accuracy. The two extruding parts are connected together by a pressure sensor, and its outer peripheral surface basically constitutes a cylindrical surface, which is used to simulate the shape of a static contact, so that when the moving contacts on both sides apply pressure to the two extruding parts, it is closer to the real situation. The contact squeezes the static contact, which can also force the pressure sensor uniformly and improve the measurement accuracy.

Description of drawings

1 is a schematic diagram of a clamping force measuring device assembly according to an embodiment of the present invention;

Fig. 2 is a bottom view of the first extrusion part in Fig. 1;

Fig. 3 is a schematic diagram of the structure of the clamping force measuring device;

Fig. 4 is the left view of Fig. 3;

Fig. 5 is a cross-sectional view of the connection between the extruded part and the pressure sensor in Fig. 1;

Fig. 6 is a schematic structural view of the first extrusion part in Fig. 1;

Fig. 7 is A-A sectional view of Fig. 6;

Fig. 8 is a schematic structural view of the second extrusion part in Fig. 1;

Fig. 9 is a B-B sectional view of Fig. 8 .

Detailed ways

As shown in Figures 3 and 4 are the state diagrams of use, the two moving contacts 5 of the scissor-type isolating switch are clamped, clamping the clamping force measuring device 6 of this embodiment, and the clamping force F is shown in Figure 4 . The force sensing part of the clamping force measuring device simulates the shape of the static contact—the overall shape is cylindrical. The force sensing part of the clamping force measuring device is composed of two parts, as shown in Figure 2, the first extrusion part 2 and The second extruding part 3, the first extruding part and the second extruding part are all bow-shaped cylinders in cross-section, and the bowstring part is a corresponding plane, and a pressure sensor 1 is arranged between them, and the pressure sensor is connected to the display. When the two extruding parts are combined together, the outer peripheral surface of the arched part is basically formed into a cylindrical shape.

Take the measurement of the clamping force of the movable contact of the GW46 series scissor-type high-voltage AC disconnector as an example. For the force of the same size and opposite direction, this force is transmitted to the pressure sensor connected to it, and the pressure sensor transmits the force value to the pressure display connected to it through the data line, and the pressure display displays the force value on the display screen in real time , the installation or inspection personnel can adjust the corresponding adjustment device according to the displayed force value, and then obtain the clamping force that meets the design requirements.

As an implementation, as shown in Figure 1 and Figure 2, a pressure sensor 1 is fixed at the left and right ends between the two extrusion parts, and the signal output end of the pressure sensor 1 is connected to a pressure sensor capable of displaying the pressure value. monitor4. The small black dots in FIG. 2 represent the connecting screws 9 between the pressure sensor 1 and the first extrusion part 2 .

Figures 6 and 7 are structural schematic diagrams of the first extrusion part, and Figures 8 and 9 are structural schematic diagrams of the second extrusion part.

As shown in FIG. 5 , the connection between the first extruding part 2 and the second extruding part 3 in the figure is through the connector and threaded hole of the pressure sensor itself. The assembly method is to firstly fix the sensor on the first extruding part 2, and then fix the second extruding part 3 on the other end of the pressure sensor 4 with screws.

The outer peripheral surfaces of the first extrusion part and the second extrusion part form a circle, which simulates the shape of the static contact, so that when the moving contacts on both sides apply pressure to the two extrusion parts, the moving contacts are closer to the real situation. Squeezing the static contact can also force the pressure sensor uniformly and improve the measurement accuracy.

In order to avoid relative sliding between the first extrusion part and the second extrusion part due to the longitudinal force during the extrusion process, a limiting structure may be provided between the two extrusion parts. As shown in FIG. 6 , limit blocks 8 are provided at both ends of the first extruding portion toward the second extruding portion to prevent the axial movement of the second extruding portion relative to the first extruding portion.

Claims (3)

1. disconnector clamping force measurement mechanism, it is characterized in that: comprise first press section and second press section, each press section is xsect and is arc cylinder, the bowstring of two press sections partly is oppositely arranged, between be provided with pressure transducer, fixedly connected with first press section, second press section respectively in two force sides of this pressure transducer, the signal output part of this pressure transducer is connected with pressure display unit.

2. a kind of disconnector clamping force measurement mechanism according to claim 1 is characterized in that: set firmly pressure transducer and first press section, second press section by screw.

3. a kind of disconnector clamping force measurement mechanism according to claim 1 is characterized in that: the described first press section two ends are provided with spacing second press section along the axially movable limited block of first press section.

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