GIS direct-acting circuit breaker opening and closing friction force measuring device and use method thereof

Abstract

The invention discloses a GIS direct-acting circuit breaker opening and closing friction force measuring device and a use method thereof. The GIS direct-acting circuit breaker opening and closing friction force measuring device comprises a supporting frame, an electric push rod, a tension and compression sensor, a connecting base and a controller. A mounting plate is fixed at one end of the support frame, the mounting plate can be bolted on the circuit breaker, and the mounting plate is provided with a through hole through which a sealing connecting rod of the corresponding circuit breaker penetrates; a shell of the electric push rod is fixed to the other end of the supporting frame, and a lead screw of the electric push rod and the sealing connecting rod are coaxially arranged. The tension-compression sensor is fixed at the telescopic end of the screw rod; one end of the connecting seat is fixed with the tension-compression sensor, and the other end can be fastened with one end of the sealing connecting rod away from the circuit breaker; the controller is electrically connected with the electric push rod and is in communication connection with the tension and compression sensor. According to the invention, the torque value of the GIS direct-acting circuit breaker during opening and closing can be accurately measured, recorded and stored, the operation is simple and convenient, and the consistency of the friction torque of a product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-voltage circuit breakers, in particular to a GIS direct-acting circuit breaker opening and closing friction force measuring device and a using method thereof. BACKGROUND

[0002] The gas-insulated metal-enclosed switchgear (GIS) is a metal-enclosed switchgear and control device that at least partially uses a gas pressure higher than atmospheric pressure as an insulating medium. It is a kind of equipment that all kinds of electrical equipment in a substation except transformers, circuit breakers, disconnectors, grounding switches, voltage transformers, current transformers, busbars, etc. are assembled in a metal shell and filled with 0.4-0.5 MPa SF6 gas to realize reliable insulation of high-voltage conductors to the shell, phase-to-phase and gap. Due to its small footprint, compact structure and reliable operation, it has become one of the important components of the substation.

[0003] As one of the important components of GIS equipment, the reliability of the circuit breaker has an important influence on the safe and stable operation of the power grid. Therefore, the reliability of the circuit breaker needs to be continuously improved and verified. Through the measurement and analysis of the transmission torque of the circuit breaker, the corresponding improvement design and improvement can effectively improve the consistency of the opening and closing parameters of the circuit breaker. This has a significant effect on the improvement of the transmission failure, refusal to open and refusal to close of the circuit breaker in the process of mass production of the first batch of new products and the gradual increase of the operation years of the old equipment.

[0004] At present, for the measurement of the opening and closing friction of the direct-acting GIS circuit breaker, the moving contact opening and closing gap is pulled for measurement after the arc extinguishing gap is disassembled and placed on a fixed platform. This kind of measurement method has the problems of large error and complicated operation.

[0005] Therefore, how to provide a device capable of accurately measuring the torque value of the GIS direct-acting circuit breaker during opening and closing is a problem that needs to be solved by those skilled in the art. SUMMARY

[0006] Therefore, the present application provides a GIS direct-acting circuit breaker opening and closing friction force measuring device and a using method thereof, which can accurately measure the torque value of the GIS direct-acting circuit breaker during opening and closing, record and store, and is simple to operate, thereby improving the consistency of the product friction torque.

[0007] In order to achieve the above purpose, the present application adopts the following technical solutions: A GIS direct-acting circuit breaker opening and closing friction force measuring device, comprising: A support frame has one end fixed with a mounting plate, the mounting plate can be bolted on the circuit breaker, and the mounting plate is provided with a through hole corresponding to the sealing connecting rod; An electric push rod has its shell fixed at the other end of the support frame, and the screw rod of the electric push rod is coaxially arranged with the sealing connecting rod; A tension sensor is fixed at the telescopic end of the screw rod; A connecting seat has one end fixed with the tension sensor and the other end fastened with the end of the sealing connecting rod away from the circuit breaker; A controller is electrically connected with the electric push rod and communicatively connected with the tension sensor.

[0008] The electric push rod, the tension sensor and the connecting seat form a measurement main body, the connecting seat is fixed with the sealing connecting rod, the telescopic operation of the screw rod of the electric push rod drives the sealing connecting rod to operate, the tension sensor quickly and accurately feeds back the friction force value in the opening and closing process in real time, and thus the opening and closing torque of the circuit breaker can be known.

[0009] Preferably, the support frame comprises oppositely arranged connecting plates and end plates, the mounting plate is arranged on the side of the connecting plate away from the end plate, the connecting plate is provided with a through hole corresponding to the through hole, the shell is fixed on the surface of the end plate, and the screw rod penetrates through the through hole and is fixed with the tension sensor. The connecting plates and the end plates ensure the coaxiality of the screw rod of the electric push rod and the sealing connecting rod.

[0010] Preferably, a plurality of first support columns are fixed between the opposite surfaces of the connecting plate and the mounting plate, and a plurality of second support columns are fixed between the opposite surfaces of the connecting plate and the end plate. The first support columns are connected in series with the connecting plate and the mounting plate, the second support columns are connected in series with the connecting plate and the end plate, the stability of the entire measurement device during the friction force measurement is ensured, the axis of the screw rod and the sealing connecting rod is ensured to coincide during the measurement process, and the accuracy of the measurement result is ensured.

[0011] Preferably, the upper end of the connecting plate is fixed with a lifting plate. The lifting plate realizes the overall lifting of the measurement device.

[0012] Preferably, the controller is provided with a display screen. The display screen can set the measurement parameters and generate the friction force measurement curve.

[0013] The application further provides a use method of the GIS direct-acting circuit breaker opening and closing friction force measuring device. S1, connecting the mounting plate and the end face of the circuit breaker through bolts, and sealing the connecting rod to pass through the through hole into the frame body of the support frame; S2, connecting the end of the sealing connecting rod through the connecting seat; S3, setting the speed of the electric push rod and the measurement range of the tension and compression sensor, and starting the electric push rod to drive the sealing connecting rod to open and close; S4, the controller generates a friction force measurement curve during the opening and closing process, and determines whether the friction force during the opening and closing process of the circuit breaker is within a reasonable range through the friction force measurement curve.

[0014] Preferably, during the measurement process, if the sealing connecting rod cannot return to the original point or temporarily adjust the measurement range, the electric push rod can be set to a jog mode.

[0015] Through the above technical solution, compared with the prior art, the application discloses a GIS direct-acting circuit breaker opening and closing friction force measuring device and a use method thereof, which realizes uniform speed opening and closing of the circuit breaker by uniformly pulling or pushing the sealing connecting rod of the circuit breaker through the electric push rod, and the tension and compression sensor quickly and accurately feeds back the friction force value in the opening and closing process in real time, while the device can automatically draw a friction torque curve and store records, realizing visual display of the friction torque and data traceability. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only embodiments of the application, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0017] Figure 1 The measuring device structure schematic diagram provided by the application; Figure 2 The front view of the measuring device provided by the application.

[0018] Among them, 1-circuit breaker; 11-sealing connecting rod; 2-mounting plate; 3-connecting seat; 4-tension and compression sensor; 5-electric push rod; 6-connection plate; 7-end plate; 8-first support column; 9-second support column; 10-hoisting plate; 11-sealing connecting rod. DETAILED DESCRIPTION

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1 Currently, the measurement of the opening and closing friction of direct-acting GIS circuit breakers is usually carried out after the arc-extinguishing chamber is assembled, placed on a fixed platform, and the moving contact is pulled to open and close the break for measurement. This measurement method requires interrupting the product assembly process and measuring after fixing on the measuring platform. The operation is cumbersome, and the measurement error is very likely to be too large when there is a deviation in the centering.

[0021] like Figure 1 and 2 As shown, a GIS direct-acting circuit breaker opening and closing friction force measuring device according to an embodiment of the present invention can accurately measure, record and store the torque value of the GIS direct-acting circuit breaker during opening and closing, and is easy to operate, improving the consistency of product friction torque. It includes a support frame, an electric push rod 5, a tension / compression sensor 4, a connecting seat 3, and a controller. One end of the support frame is fixed with a mounting plate 2, which can be bolted to the circuit breaker 1. The mounting plate 2 has a through hole through which the sealing connecting rod 11 of the circuit breaker 1 passes. The housing of the electric push rod 5 is fixed to the other end of the support frame, and the lead screw of the electric push rod 5 is coaxially arranged with the sealing connecting rod 11. The tension / compression sensor 4 is fixed to the extension end of the lead screw. One end of the connecting seat 3 is fixed to the tension / compression sensor 4, and the other end can be fastened to the end of the sealing connecting rod 11 away from the circuit breaker 1. The controller is electrically connected to the electric push rod 5 and communicatively connected to the tension / compression sensor 4.

[0022] like Figure 1 As shown, the measuring device in this embodiment can perform measurements after the circuit breaker is assembled, without interrupting the assembly process. By using an electric push rod to pull or push the circuit breaker's sealing link at a constant speed, the circuit breaker can achieve uniform opening and closing. The tension / compression sensor provides rapid and accurate real-time feedback of the friction force values ​​during the opening and closing process. Operation is simple, and the support frame ensures the alignment of the lead screw of the electric push rod with the sealing link (i.e., the axes of the lead screw and the sealing link coincide). This measuring device can be widely applied in the production and assembly process of GIS direct-acting circuit breakers, improving the consistency of product characteristic parameters, ensuring reliable and stable product operation, and achieving significant economic benefits.

[0023] In order to further optimize the above technical solutions, realize the installation of the electric push rod on the support frame, and ensure that the screw rod of the electric push rod is coaxially arranged with the sealing connecting rod, the support frame comprises a connecting plate 6 and an end plate 7 arranged oppositely, and the mounting plate 2 is arranged on the side of the connecting plate 6 away from the end plate 7; a through hole corresponding to the through hole is formed in the plate surface of the connecting plate 6; the shell is fixed on the plate surface of the end plate 7, and the screw rod penetrates through the through hole and is fixed with the tension and pressure sensor 4.

[0024] In order to further optimize the above technical solutions, ensure the stability during the measurement, and ensure that the screw rod and the sealing connecting rod do not deform relatively during the measurement, a plurality of first supporting columns 8 are fixed between the opposite plate surfaces of the connecting plate 6 and the mounting plate 2; a plurality of second supporting columns 9 are fixed between the opposite plate surfaces of the connecting plate 6 and the end plate 7.

[0025] The electric push rod, the tension and pressure sensor and the connecting seat in the embodiment form a measurement main body, the mounting plate, the first supporting column, the connecting plate, the second supporting column and the end plate form a support frame, and the measurement main body is located in the support frame. In actual use, the mounting plate is bolted with the circuit breaker, the sealing connecting rod enters the support frame, and the sealing connecting rod is connected by the connecting seat for measurement. The measurement device of the embodiment has the advantages of simple structure, low cost and convenient operation.

[0026] In other specific embodiments, the upper end of the connecting plate 6 is fixed with a hoisting plate 10, which facilitates the transfer of the measurement device.

[0027] In order to further optimize the above technical solutions, a display screen is arranged on the controller. The speed of the electric push rod and the measurement range of the tension and pressure sensor can be set through the display screen. After the signal of the tension and pressure sensor is fed back to the controller, the controller can generate a friction force measurement curve and display it on the display screen. Whether the friction force of the circuit breaker is within a reasonable range can be determined according to the friction force measurement curve. In addition, the controller of the embodiment also has data storage and data export functions, and can store the friction force data and export the data when needed.

[0028] Embodiment 2 According to the use method of the GIS direct-acting circuit breaker opening and closing friction force measurement device, the following steps are included: S1, connect the mounting plate 2 and the end face of the circuit breaker 1 through bolts, and pass the sealing connecting rod 11 through the through hole into the frame body of the support frame; S2, connect the connecting seat 3 and the end of the sealing connecting rod 11; S3, turn on the tension and pressure sensor and the electric push rod power supply, open the tension and pressure sensor display, enter the main interface of the display, reset the electric push rod to the origin, set the speed of the electric push rod 5 and the measurement range of the tension and pressure sensor 4, and start the electric push rod 5 to drive the sealing connecting rod 11 to operate the opening and closing of the circuit breaker; S4, the controller generates the friction measurement curve in the process of closing, and determines whether the friction in the process of closing and opening of the circuit breaker 1 is in a reasonable range through the friction measurement curve; S5, the controller automatically records the curve and value of the measurement process, and can be queried or exported in the history record when needed.

[0029] When measuring the friction in the process of closing and opening, the above operation steps can be completed, but if the sealing connecting rod of the circuit breaker is not restored to the original position or temporarily needs to be adjusted, the electric push rod can be set to the point mode, and the measurement is manually adjusted.

[0030] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for measuring the opening and closing friction force of a GIS direct-acting circuit breaker, characterized in that, include: A support frame, one end of which is fixed with a mounting plate (2), which can be bolted to the circuit breaker (1), and the mounting plate (2) has a through hole through which the sealing rod (11) of the circuit breaker (1) passes; Electric push rod (5), the housing of the electric push rod (5) is fixed to the other end of the support frame, and the lead screw of the electric push rod (5) is arranged coaxially with the sealing connecting rod (11); A tension / compression sensor (4) is fixed to the telescopic end of the lead screw; Connecting seat (3), one end of which is fixed to the tension / compression sensor (4), and the other end can be fastened to the end of the sealing rod (11) away from the circuit breaker (1); The controller is electrically connected to the electric push rod (5) and communicatively connected to the tension / compression sensor (4).

2. The GIS direct-acting circuit breaker opening and closing friction measuring device according to claim 1, characterized in that, The support frame includes a connecting plate (6) and an end plate (7) arranged opposite to each other. The mounting plate (2) is located on the side of the connecting plate (6) away from the end plate (7). A through hole corresponding to the through hole is opened on the plate surface of the connecting plate (6). The housing is fixed on the plate surface of the end plate (7) and the lead screw passes through the through hole and is fixed to the tension and compression sensor (4).

3. The GIS direct-acting circuit breaker opening and closing friction measuring device according to claim 2, characterized in that, Multiple first support columns (8) are fixed between the two opposite sides of the connecting plate (6) and the mounting plate (2); multiple second support columns (9) are fixed between the two opposite sides of the connecting plate (6) and the end plate (7).

4. The GIS direct-acting circuit breaker opening and closing friction measuring device according to claim 3, characterized in that, The upper end of the connecting plate (6) is fixed with a hoisting plate (10).

5. The device for measuring the opening and closing friction force of a GIS direct-acting circuit breaker according to claim 1, characterized in that, The controller is equipped with a display screen.

6. The method of using the GIS direct-acting circuit breaker opening and closing friction measuring device according to any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Connect the mounting plate (2) to the end face of the circuit breaker (1) with bolts, and the sealing rod (11) passes through the through hole and enters the frame of the support frame; S2. Connect the end of the sealing rod (11) to the connecting seat (3); S3. The controller sets the speed of the electric push rod (5) and the measurement range of the tension and compression sensor (4), and starts the electric push rod (5) to drive the sealing connecting rod (11) to perform opening and closing operations; S4. The controller generates friction force measurement curves during the opening and closing process, and determines whether the friction force of the circuit breaker (1) during the opening and closing process is within a reasonable range by using the friction force measurement curves.

7. The method of using the GIS direct-acting circuit breaker opening and closing friction measuring device according to claim 6, characterized in that, If the sealing rod (11) fails to return to the origin during the measurement process or the measurement range is temporarily adjusted, the electric push rod (5) can be set to jog mode.

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