CN210720022U

CN210720022U - Composite insulator buckling detection device

Info

Publication number: CN210720022U
Application number: CN201921298460.1U
Authority: CN
Inventors: 魏邦钦
Original assignee: Yichang Hengyuan Technology Co ltd
Current assignee: Yichang Hengyuan Technology Co ltd
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-06-09
Anticipated expiration: 2029-08-12

Abstract

The buckling detection device for the composite insulator comprises a base, wherein a torque sensor, an axial limiting seat, a radial limiting seat and a mounting seat are fixedly mounted on the base; the axial limiting seat comprises a shell and a support fixedly connected with the shell, a rotary table is arranged in the shell, and a connecting shaft penetrates through the shell and is fixedly connected with the rotary table; one end of the connecting shaft is connected with the torque sensor through a coupler; a square hole is arranged in the radial limiting seat, and a square shaft is arranged in the square hole; a first oil cylinder is arranged on the mounting seat, and the first oil cylinder and the square shaft are respectively connected to two sides of the force measuring sensor; hardware fittings at two ends of the composite insulator to be tested are respectively and fixedly connected with the connecting shaft and the square shaft; a rocker arm is fixedly connected to the connecting shaft, and one end of the rocker arm is hinged to the base through a second oil cylinder. The utility model discloses simulate composite insulator at the tensile and torsional load of hanging net galloping in-process, detect composite insulator and wave buckling characteristic to at device simple structure, low in manufacturing cost is honest and clean.

Description

Composite insulator buckling detection device

Technical Field

The utility model relates to a composite insulator bucking detection device.

Background

The composite insulator is a long rod-shaped non-breakdown composite insulator, and the core rod is a glass fiber epoxy resin drawing rod with high tensile strength. The outside is coated with a layer of silicon rubber sheath with excellent insulating property, so that the core rod is protected from atmospheric corrosion. In order to ensure the quality of the interface between the sheath and the core rod, the production process requires that the connection interface between the sheath and the core rod is tight and the bonding strength is high. However, the composite insulator is often subjected to bending stress when being waved by strong wind during operation in a power grid. The composite insulator can be subjected to larger tangential force along with the swinging of the electric wire in the actual working process, the composite insulator is often subjected to torsional failure in a power grid to cause larger accidents, and before the produced composite insulator is put into field application, a buckling test method is required to be adopted to carry out spot inspection on the composite insulator. The buckling detection devices in the prior art mainly include a stretching method and a twisting method, for example: the patent number is CN 102914474B, the name is composite insulator torsion resistance test tool, which is a torsion method; the patent number is CN 101750255B, the name is a composite insulator bending fatigue detection device, and a stretching method is adopted; in the actual work of the insulator, the insulator is subjected to two forces of torsion and tension at the same time, so that the two unilateral detections are not comprehensive enough; based on this, some prior patents combine the above two testing methods, for example, patent No. CN 106018099B, entitled "a method for detecting the crimping quality of end fittings of composite insulators", the device structure includes a servo motor, a hydraulic station, a lathe and a plurality of oil cylinders, the structure is complex, the manufacturing cost is high, and the device is very suitable for scientific research unit experiments requiring accurate data, such as research institutes, design institutes and electric power laboratories; for enterprises, the requirement on data of a buckling test of a spot-check composite insulator is higher than the national standard (for example, GB/T19519-2004) and the procurement requirement of power enterprises (for example, Q/JDL 1.309-200610 kV composite insulator technical specification) is met, so that the development of a buckling detection device which is simple in structure, low in manufacturing cost and convenient to maintain is necessary.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide composite insulator bucking detection device, simulate composite insulator at the tensile and torsional load of hanging net galloping in-process, detect composite insulator and gallop the buckling characteristic to at device simple structure, low in manufacturing cost is honest and clean.

In order to solve the above problem, the to-be-solved technical scheme of the utility model is:

the buckling detection device for the composite insulator comprises a base, wherein a torque sensor, an axial limiting seat, a radial limiting seat and a mounting seat are fixedly mounted on the base; the axial limiting seat comprises a shell and a support fixedly connected with the shell, a rotary table is arranged in the shell, and a connecting shaft penetrates through the shell and is fixedly connected with the rotary table; one end of the connecting shaft is connected with the torque sensor through a coupler; a square hole is arranged in the radial limiting seat, and a square shaft is arranged in the square hole; a first oil cylinder is arranged on the mounting seat, and the first oil cylinder and the square shaft are respectively connected to two sides of the force measuring sensor; hardware fittings at two ends of the composite insulator to be tested are respectively and fixedly connected with the connecting shaft and the square shaft; a rocker arm is fixedly connected to the connecting shaft, and one end of the rocker arm is hinged to the base through a second oil cylinder.

Two plane bearings are arranged in the shell and are respectively arranged on two sides of the turntable.

The control system comprises a PLC controller, a touch screen and two electromagnetic valves for respectively controlling the first oil cylinder and the second oil cylinder, the torque sensor and the force measuring sensor are connected with the input end of the PLC controller, the electromagnetic valves are connected with the output end of the PLC controller, and the touch screen is in communication connection with the PLC controller.

The technical effects of the utility model are that: the first oil cylinder pushes the composite insulator to compress or stretch, and simultaneously, the second oil cylinder pushes the composite insulator to twist back and forth, so that the stretching and twisting loads of the composite insulator in the net hanging galloping process are simulated, the galloping buckling characteristic of the composite insulator is detected, the detection of the mechanical strength of the composite insulator, the quality of the sheath and core rod interfaces and the bonding quality of the sheath and the umbrella skirt is realized, the delivery quality of the composite insulator is ensured, and the device has the advantages of simple structure, low manufacturing cost and convenience in maintenance and use.

Drawings

The invention will be further explained with reference to the drawings:

FIG. 1 is a schematic view of the front view structure of the present invention,

figure 2 is a schematic top view of the present invention,

FIG. 3 is a schematic view of the enlarged partial structure of the present invention,

figure 4 is a circuit diagram of the present invention,

fig. 5 is a schematic diagram of the hydraulic system of the present invention.

In the figure: the device comprises a torque sensor 1, a coupler 2, an axial limiting seat 3, a connecting shaft 4, a composite insulator 6, a base 5, a square shaft 7, a radial limiting seat 8, a force measuring sensor 9, a mounting seat 10, a first oil cylinder 11, a second oil cylinder 12, a rocker arm 13, a shell 31, a support 32, a turntable 33 and a plane bearing 34.

Detailed Description

As shown in fig. 1 to 5, the buckling detection device for the composite insulator comprises a base 5, wherein a torque sensor 1, an axial limiting seat 3, a radial limiting seat 8 and a mounting seat 10 are fixedly mounted on the base 5; the axial limiting seat 3 comprises a shell 31 and a support 32 fixedly connected with the shell 31, a turntable 33 is arranged in the shell 31, and the connecting shaft 4 penetrates through the shell 31 and is fixedly connected with the turntable 33; one end of the connecting shaft 4 is connected with the torque sensor 1 through the coupler 2; a square hole is arranged in the radial limiting seat 8, and a square shaft 7 is arranged in the square hole; a first oil cylinder 11 is arranged on the mounting seat 10, and the first oil cylinder 11 and the square shaft 7 are respectively connected to two sides of the force measuring sensor 9; hardware fittings at two ends of the composite insulator to be tested 6 are respectively and fixedly connected with the connecting shaft 4 and the square shaft 7; a rocker arm 13 is fixedly connected to the connecting shaft 4, one end of the rocker arm 13 is hinged to the base 5 through a second oil cylinder 12, when the first oil cylinder 11 drives the composite insulator 6 to stretch and bend in the use process, the second oil cylinder 12 pushes the composite insulator 6 to twist, and because the rotary disc 33 in the shell 31 axially limits the connecting shaft 4, when the first oil cylinder 11 pushes the composite insulator 6 to bend, the pushing force of the first oil cylinder 11 does not affect the second oil cylinder 12 and the torque sensor 1; when the second oil cylinder 12 drives the composite insulator 6 to twist, the output torque of the second oil cylinder 12 cannot influence the first oil cylinder 11 due to the limit of the square hole on the square shaft 7; in addition, in order to reduce the influence of the sliding friction between the rotary table 33 and the housing 31 and between the square hole and the square shaft 7 on the data measured by the torque sensor 1 and the load cell 9, grease needs to be applied between the rotary table 33 and the housing 31 and between the square hole and the square shaft 7.

The control system comprises a PLC (programmable logic controller), a touch screen, a computer and two electromagnetic valves for respectively controlling the first oil cylinder 11 and the second oil cylinder 12, the torque sensor 1 and the force measuring sensor 9 are connected with the input end of the PLC, the electromagnetic valves are connected with the output end of the PLC, and the touch screen is in communication connection with the PLC.

Two flat bearings 34 are provided in the housing 31, and the two flat bearings 34 are provided on both sides of the turntable 33. The flat bearing 34 changes the sliding friction applied by the dial 33 to the housing 31 into rolling friction, and reduces the influence of the dial 33 friction on the torque sensor 1.

The utility model discloses a use method does: after the composite insulator 6 is assembled, the following method can be adopted for detection;

s1, when the first oil cylinder 11 pushes the composite insulator 6 to bend, the load cell 9 transmits the monitored signal to the PLC controller, and when the load cell 9 monitors that the applied torque reaches a preset torque, the PLC controller controls the first oil cylinder 11 to stop loading; and then the second oil cylinder 12 drives the composite insulator 6 to repeatedly twist forwards and backwards for multiple times, the twisting moment is monitored by the torque sensor 1 in real time, after the detection is finished, the PLC controls the two three-position four-way electromagnetic valves to return to the middle position, the first oil cylinder 11 and the second oil cylinder 12 discharge oil, and the composite insulator 6 returns to the normal state.

And S2, pulling the composite insulator 6 to be straight by the first oil cylinder 11, repeatedly twisting the composite insulator 6 forwards and backwards by the second oil cylinder 12 for multiple times, unloading oil from the first oil cylinder 11 and the second oil cylinder 12, and recovering the composite insulator 6 to be normal.

S3: and (3) detaching the composite insulator 6, detecting the mechanical strength of the composite insulator 6, dissecting the composite insulator 6, and checking the interface quality of the sheath and the core rod, the bonding quality of the sheath and the umbrella skirt, and the crimping quality of the hardware fitting and the core rod.

Claims

1. Composite insulator bucking detection device, including base (5), its characterized in that: a torque sensor (1), an axial limiting seat (3), a radial limiting seat (8) and a mounting seat (10) are fixedly arranged on the base (5); the axial limiting seat (3) comprises a shell (31) and a support (32) fixedly connected with the shell (31), a turntable (33) is arranged in the shell (31), and the connecting shaft (4) penetrates through the shell (31) and is fixedly connected with the turntable (33); one end of the connecting shaft (4) is connected with the torque sensor (1) through the coupler (2); a square hole is arranged in the radial limiting seat (8), and a square shaft (7) is arranged in the square hole; a first oil cylinder (11) is arranged on the mounting seat (10), and the first oil cylinder (11) and the square shaft (7) are respectively connected to two sides of the force measuring sensor (9); hardware fittings at two ends of the composite insulator to be tested (6) are respectively and fixedly connected with the connecting shaft (4) and the square shaft (7); a rocker arm (13) is fixedly connected to the connecting shaft (4), and one end of the rocker arm (13) is hinged to the base (5) through a second oil cylinder (12).

2. The composite insulator buckling detection device of claim 1, wherein: two plane bearings (34) are arranged in the shell (31), and the two plane bearings (34) are respectively arranged on two sides of the turntable (33).

3. The composite insulator buckling detection device according to any one of claims 1 or 2, wherein: the hydraulic control system is characterized by further comprising a control system, the control system comprises a PLC (programmable logic controller), a touch screen and two electromagnetic valves, the two electromagnetic valves are used for respectively controlling the first oil cylinder (11) and the second oil cylinder (12), the torque sensor (1) and the force measuring sensor (9) are connected with the input end of the PLC, each electromagnetic valve is connected with the output end of the PLC, and the touch screen is in communication connection with the PLC.