箱变高压侧电缆头绝缘检测装置
The simplified operation of the high-voltage side cable head insulation detection device for transformer substations utilizes a transmission pressure block and a temperature sensor to simultaneously detect the cable insulation and temperature, solving the problems of complex assembly and poor detection effect of existing devices, and realizing convenient cable insulation and temperature monitoring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CLP EQUIP DENGFENG WIND POWER CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing insulation testing devices are complex to assemble, involve numerous steps, and are ineffective in detecting insulation performance and local temperature changes after cable damage.
An insulation detection device for the high-voltage side cable head of a box-type transformer was designed. By simply opening and closing the box and the cover, the transmission block is brought close to the cable body by the transmission pressure block, so that the detection circuit and the temperature sensor work synchronously to monitor insulation and temperature.
It enables simple assembly of the cable body, timely detection of leakage and high temperature conditions, and improves the effectiveness of insulation testing and the accuracy of temperature monitoring.
Smart Images
Figure CN224518889U_ABST
Abstract
Claims
1. A transformer substation high-voltage side cable head insulation testing device, comprising a transformer substation and several testing module heads acting on the transformer substation and used for insulation testing of the cable body (114), characterized in that: Several inspection module heads can be spliced horizontally and vertically onto the cable body (114); Each of the detection module headers includes: Box body (211); Box lid (212); A through slot (214) is formed in the middle of the housing (211) for the cable body (114) to pass through. Transmission blocks (216) are respectively mounted on both sides of the housing (211) via pins (215) and can be deflected relative to each other. Each transmission block (216) is provided with a detection circuit. And a transmission pressure block located at the bottom of the box cover (212), wherein a temperature sensor (222) is provided at the bottom of the transmission pressure block. When the cover (212) is assembled with the box body (211), the transmission pressure block is used to bring the two transmission blocks (216) closer to each other and wrap the cable body (114). When the detection circuit is attached to the insulation layer of the cable body (114) and performs insulation detection, the temperature sensor (222) is close to the surface of the cable body (114) and performs temperature monitoring.
2. The insulation testing device for the high-voltage side cable head of the transformer substation according to claim 1, characterized in that: The transformer box includes: Box (111); A transformer (112) is installed inside the enclosure (111), and several high-voltage bushings (115) are installed on the transformer (112). And a number of conduits (113) provided on the side wall of the enclosure (111) for the passage of a number of cable bodies (114).
3. The insulation testing device for the high-voltage side cable head of the transformer substation according to claim 2, characterized in that: The transmission pressure block includes: The pressure block body (219) is fixed at the bottom of the box cover (212), wherein the temperature sensor (222) is assembled in the middle of the pressure block body (219), and the detection circuit is assembled at both ends of the pressure block body (219); And a reset spring ring (218) fixed at the bottom of the box (211) and in contact with the two transmission blocks (216). When the box cover (212) is assembled with the box (211), the reset spring ring (218) squeezes the two transmission blocks (216) toward the cable body (114) and wraps the insulation layer of the cable body (114).
4. The insulation testing device for the high-voltage side cable head of the transformer substation according to claim 3, characterized in that: Each of the detection circuits includes: A conductive plate (217) is disposed inside the transmission block (216) and can be attached to the outer wall of the cable body (114). A first wire (220) is provided in the transmission block (216), wherein one end of the first wire (220) is electrically connected to the conductive plate (217), and the other end is close to the pressure block body (219) and provided with a first mating terminal; And a second pair of wire terminals (221) installed at the end of the pressure block body (219) and aligned with the first mating terminal.
5. The insulation testing device for the high-voltage side cable head of the transformer substation according to claim 4, characterized in that: The top of the cover (212) is also provided with a mounting base (223) and a sound and light alarm (224) arranged in a ring on the top of the mounting base (223). The bottom of the mounting base (223) is provided with a first line for electrical connection between the sound and light alarm (224) and two second pairs of wire terminals (221). The mounting base (223) has a second line on its side wall for electrically connecting the audible and visual alarm (224) and the high-voltage bushing (115). When the first line and the second line form a closed circuit, the audible and visual alarm (224) will issue a leakage alarm.
6. The insulation testing device for the high-voltage side cable head of the transformer substation according to claim 5, characterized in that: The first line includes: A first wire (220) is provided in the mounting base (223) and connected to the audible and visual alarm (224); And two second wires are provided in the pressure block body (219), wherein the opposite ends of the two second wires extend to both ends of the pressure block body (219) and are electrically connected to two second pairs of wire terminals (221) respectively, and the opposite ends of the two wires converge towards the middle of the pressure block body (219) and are electrically connected to the end of the first wire (220) away from the sound and light alarm (224).
7. The insulation testing device for the high-voltage side cable head of the transformer substation according to claim 5, characterized in that: The second line includes: A third wire (225) is provided on the mounting base (223) and connected to the audible and visual alarm (224); And a conductive clamp installed on the end of the third wire (225) away from the audible and visual alarm (224) for connection to the high-voltage bushing (115).
8. The insulation testing device for the high-voltage side cable head of the transformer substation according to claim 5, characterized in that: A buzzer (226) is also provided on the top of the mounting base (223); The mounting base (223) is provided with a third circuit inside, the third circuit including a fourth wire, wherein the two ends of the fourth wire are electrically connected to a buzzer (226) and a temperature sensor (222) respectively.
9. The insulation testing device for the high-voltage side cable head of the transformer substation according to claim 2, characterized in that: The side wall of the box (111) is provided with two first slide rails (230) corresponding to several detection module heads, and two first slide bars (229) fixed to the side wall of the box (211) located on the inside. Two second slide rails (227) and two second slide bars (228) are installed between two adjacent boxes (211), wherein the two first slide bars (229) are adapted to be installed with the two boxes (211), and the two second slide rails (227) are adapted to be connected with the two second slide bars (228).
10. The insulation testing device for the high-voltage side cable head of the transformer substation according to claim 1, characterized in that: A latch (213) is provided in a ring between the box body (211) and the box cover (212).