CN-224203262-U - Insulation impedance test rogowski coil fixing tool

Abstract

The utility model provides a fixing tool for an insulation resistance test Rogowski coil, which relates to the technical field of insulation resistance test, and comprises a fixing tool, wherein the fixing tool is firstly placed on a steel rail surface, the steel rail is adsorbed by utilizing the magnetic force of a strong magnet, the Rogowski coil is placed at a corresponding position of the fixing tool, a clamping pin is positioned at the upper part of a groove of the tool and used for positioning the Rogowski coil, meanwhile, a screw is matched and locked with the positioning pin to prevent the Rogowski coil from shifting, then a positioning component is arranged at a preset position of the fixing tool, promote the ejector pad, first expansion spring drives movable block and locating plate and removes, through the cooperation in rotating block, first spacing groove and second spacing groove for ejector pad and locating plate reverse movement, after unclamping the ejector pad, the spring resilience makes the locating plate compress tightly the rogowski coil, ensures its fixed in position, realizes quick assembly disassembly and anti-vibration stability, to the accurate location and the stable clamp of rogowski coil, is applicable to the high accuracy measurement of railway insulation impedance.

Inventors

• SONG XIAOPING
• ZHU RENDE
• WANG CHUNNAN
• ZHU CHUNJIN
• YE ZHIPENG
• LIU XIAOLONG
• YUAN GUANGHUA
• DU FUJUN
• FENG GUIGANG

Assignees

• 上海仁昊电子科技有限公司

Dates

Publication Date

20260505

Application Date

20250519

Claims (6)

1. 1. Insulation resistance tests fixed frock of rogowski coil, including fixed frock (1), its characterized in that still includes: The fixing assembly (2), the fixing assembly (2) comprises a locating pin (23) arranged on the fixing tool (1), a screw (24) is connected to the fixing tool (1) in a threaded mode, the screw (24) is connected to the locating pin (23) in a threaded mode, and a strong magnet (25) is connected to the fixing tool (1); The positioning assembly (3), positioning assembly (3) is including setting up casing (31) in fixed frock (1) one side, sliding connection has ejector pad (32) in casing (31), be connected with first expansion spring (33) on ejector pad (32), the other end of first expansion spring (33) is connected with movable block (34), be connected with locating plate (35) on movable block (34), casing (31) internal rotation is connected with rotating block (36), first spacing groove (37) have been seted up on movable block (34), second spacing groove (38) have been seted up on ejector pad (32), the one end setting of rotating block (36) is in first spacing groove (37), the other end setting of rotating block (36) is in second spacing groove (38).
2. 2. The insulation resistance testing rogowski coil fixing tool according to claim 1, characterized in that a positioning groove (21) is formed in the fixing tool (1).
3. 3. The insulation resistance testing rogowski coil fixing tool according to claim 1, characterized in that the fixing tool (1) is connected with a reinforcing rib (22).
4. 4. The insulation resistance testing rogowski coil fixing tool according to claim 1, characterized in that a second telescopic spring (39) is arranged in the shell (31), one end of the second telescopic spring (39) is connected to the shell (31), and the other end of the second telescopic spring (39) is connected to the push block (32).
5. 5. The insulation resistance testing rogowski coil fixing tool according to claim 1, characterized in that the push block (32) is connected with a guide rod (310), and the guide rod (310) is slidably connected in the housing (31).
6. 6. The insulation resistance testing rogowski coil fixing tool according to claim 1, characterized in that a bolt (311) is connected to the shell (31) in a threaded manner, and the bolt (311) is connected to the reinforcing rib (22) in a threaded manner.

Description

Insulation impedance test rogowski coil fixing tool Technical Field The utility model relates to the technical field of insulation impedance testing, in particular to a fixing tool for a Rogowski coil for insulation impedance testing. Background Insulation impedance testing is an important link for ensuring the safety of electrical equipment, wherein a rogowski coil is widely applied to impedance testing, and in the existing rogowski coil testing method, a fixing tool often lacks stability and accuracy, so that test data errors are large, and therefore, a high-accuracy and stable fixing tool is developed, the testing efficiency and accuracy can be effectively improved, and the strict requirements of modern electrical equipment on impedance testing are met. However, in practical use, the existing insulation impedance test rogowski coil fixing tool still has the defects that for example, quick disassembly and assembly and vibration resistance stability cannot be realized, the existing insulation impedance test rogowski coil fixing tool is not suitable for high-precision measurement of railway insulation impedance due to the fact that accurate positioning and stable clamping functions are not available, the rogowski coil needs to be repeatedly adjusted after being installed, debugging time is increased, vibration exists in a railway environment, if the vibration resistance stability of the tool is insufficient, the rogowski coil can slightly move or displace to cause measurement reference deviation, errors are introduced, the rogowski coil measures current through an induction magnetic field, the position deviation of the rogowski coil changes the relative position with a measured circuit, the strength and distribution of the induced magnetic field change, the measured current value is caused to deviate, insulation impedance measurement is usually calculated based on parameters such as measured leakage current, the current measurement inaccuracy can directly cause larger error of an insulation impedance calculation result, and the insulation performance of a measured object cannot be truly reflected. Therefore, the utility model provides a fixing tool for testing the rogowski coil in insulation resistance, which solves the problems. Disclosure of utility model The utility model aims to solve the defects in the prior art and provides a fixing tool for an insulation impedance test rogowski coil. In order to achieve the purpose, the utility model adopts the following technical scheme that the insulation impedance testing rogowski coil fixing tool comprises a fixing tool and further comprises: The fixing assembly comprises a locating pin arranged on a fixing tool, a screw is connected to the fixing tool in a threaded mode, the screw is connected to the locating pin in a threaded mode, and a strong magnet is connected to the fixing tool; The positioning assembly comprises a shell arranged on one side of the fixed tool, a push block is connected in the shell in a sliding manner, a first telescopic spring is connected to the push block, the other end of the first telescopic spring is connected with a moving block, a positioning plate is connected to the moving block, a rotating block is connected to the inner side of the shell in a rotating manner, a first limiting groove is formed in the moving block, a second limiting groove is formed in the push block, one end of the rotating block is arranged in the first limiting groove, and the other end of the rotating block is arranged in the second limiting groove. Furthermore, a positioning groove is formed in the fixing tool. The positioning groove is matched with the shape of the Rogowski coil, the Rogowski coil is placed in the positioning groove when in use, the position of the Rogowski coil is precisely restrained by virtue of the limiting function of the positioning groove, the installation consistency of the Rogowski coil is ensured, the change of an induced magnetic field caused by installation deviation is avoided, and a foundation is provided for the follow-up accurate measurement of current. Further, the fixing tool is connected with a reinforcing rib. The reinforcing rib is connected to the fixed tool, the supporting point and the stress surface of the tool structure are increased, the integral rigidity and the integral strength of the tool are improved, and when the fixed tool is impacted or extruded by external force, the reinforcing rib disperses stress, so that the tool is prevented from deforming, and the stability of the fixing environment of the rogowski coil is ensured. Further, a second telescopic spring is arranged in the shell, one end of the second telescopic spring is connected to the shell, and the other end of the second telescopic spring is connected to the push block. The beneficial effect of adopting the further scheme is that one end of the second telescopic spring is connected with the shell, the other end of the second telescopic spring is c