Gamma-shaped wire clamp device with temperature measurement function

Abstract

An inverted L-shaped wire clamp device with a temperature measurement function comprises an inverted L-shaped wire clamp body (1), a temperature monitoring device (2) and an inverted L-shaped wire clamp body insulation sleeve. The inverted-L-shaped wire clamp body insulation sleeve wraps the inverted-L-shaped wire clamp body and the temperature monitoring device. The inverted-L-shaped wire clamp body is of a right-angle inverted-L-shaped structure formed by bending a long-strip rectangular copper plate, two sets of screw holes are formed in the middle portions of the two ends of the right-angle rectangular copper plate in the length direction respectively, the two screw holes in one set are screw holes (4) fixedly connected with a switch disconnecting link, and the two screw holes in the other set are screw holes (5) connected with a cable terminal. The temperature monitoring device is internally provided with a bimetal structure and a red alarm marking rod (3), and the bimetal structure and the red alarm marking rod are matched in a normal temperature state and are mutually fixed and locked. According to the inverted L-shaped wire clamp device, the over-temperature monitoring device is adopted, so that over-temperature of the wire clamp can be found in time through extension of a red alarm marking rod during inspection, quick maintenance is achieved, power failure is reduced, and power failure time is shortened.

Description

Technical Field

[0001] This utility model relates to a Г-type wire clamp device with temperature measurement function, belonging to the field of power connection hardware technology. Background Technology

[0002] In recent years, the country has been advocating high-quality development, and all sectors of society have made significant progress, leading to a growing demand for electricity. To ensure the safe and reliable operation of the power grid, countless power grid workers have made continuous efforts to guarantee the long-term safe power supply.

[0003] However, during long-term operation of the power grid, there are issues such as unreliable connections between line disconnect switches and cable heads, incorrect wiring methods, and overheating of connection points during high-current operation, leading to fires and burnt cable terminals, causing power outages and losses for customers. Furthermore, cable joints are prone to overheating due to thermal expansion and contraction during long-term operation, but this is difficult to detect visually during inspections.

[0004] Traditionally, the connection between disconnect switches and cable lines involves two methods: direct connection between the cable and the disconnect switch, and a flexible connector using an insulated wire. Field findings revealed that direct connections suffer from several drawbacks: excessive cable bending can cause the cable's protective sheath to flip; large cables are difficult and time-consuming to install, and the stress on them during bending can easily damage the disconnect switch connection. Flexible connectors, often using aluminum insulated wire to bridge the copper cable and equipment, are prone to overheating during operation and are not very effective. Summary of the Invention

[0005] The purpose of this utility model is to solve the problems of unreliable connection between line disconnection switches and cable heads, incorrect wiring methods, overheating of connection points during high current operation, and even burning of cable terminals in traditional power grids. This invention discloses a Г-type clamp device with temperature measurement function.

[0006] The technical solution of this utility model is as follows: a Г-type wire clamp device with temperature measurement function, comprising a Г-type wire clamp body, a temperature monitoring device, and an insulating sleeve for the Г-type wire clamp body; the Г-type wire clamp body is a right-angled Г-shaped structure bent from a long rectangular copper plate, with two screw holes respectively opened in the middle of the two ends of the right-angled rectangular copper plate along its length; the temperature monitoring device is installed on both sides of the screw hole at one end of the Г-type wire clamp body; the temperature monitoring device is provided with a bimetallic structure and a red alarm indicator rod. Under normal temperature conditions, the bimetallic structure and the red alarm indicator rod cooperate and are locked together. After the temperature rises to a preset temperature, the bimetallic sheet will deform, and the cooperation between it and the red alarm indicator rod will automatically loosen. Under the action of a spring, the red alarm indicator rod will be ejected by force; the insulating sleeve for the Г-type wire clamp body wraps around the Г-type wire clamp body and the temperature monitoring device.

[0007] The insulating sleeve of the Г-type clamp body is Г-shaped, with an inlet and an outlet at each end; the two narrow sides of the Г-type clamp body are respectively provided with cable terminal connection window and switch knife switch connection window, and both windows are provided with sealing covers.

[0008] The temperature monitoring device includes a base, a stainless steel bracket, a bimetallic strip, a spring, and a warning bar sleeve, all housed within a rectangular shell. The base is a U-shaped structure with varying heights; the warning bar sleeve is mounted on the left side, and the bimetallic strip and stainless steel bracket are mounted on the right side. The warning bar sleeve is a cylindrical structure with holes at both ends. One end is spring-loaded onto the cylinder on the left side of the base, and the other end is press-fitted to an indicator cover. The warning bar sleeve and indicator cover together form a red alarm indicator. The end of the warning bar sleeve furthest from the base is truncated cone-shaped, with the larger end having a larger cross-sectional diameter than the warning bar sleeve, forming a small step with the outer wall of the sleeve. The smaller end of the cone has a cross-sectional diameter equal to the warning bar sleeve's cross-sectional diameter. Near the warning bar sleeve on the right side of the base, a stainless steel bracket and bimetallic strip structure are installed. The stainless steel bracket secures the bimetallic strip, and one end extends laterally to connect with the step at one end of the warning bar sleeve, forming a latch that restricts movement of the warning bar sleeve under spring pressure.

[0009] The beneficial effects of this utility model are as follows: The wire clamp device uses a Г-type wire clamp connection method, changing the original method of directly connecting the cable to the line disconnect switch and using an insulated wire with a flexible connection between the cable and the line disconnect switch. This avoids the phenomenon of cable terminal burnout due to unreliable connections, reducing the occurrence of power outages. The over-temperature monitoring device used in this Г-type wire clamp device can promptly detect over-temperature of the wire clamp during inspections by extending the red alarm indicator rod, enabling rapid maintenance, reducing power outages, and shortening outage time.

[0010] This utility model's wire clamp device adopts a Г-type connection. During construction, the disconnecting switch can be connected before installation, and only bolts are needed for connection to the cable. It eliminates the need for bending cables and making flexible connections, reducing time by 50% compared to previous connection methods. This significantly improves on-site work efficiency. This utility model can be applied to power distribution network construction projects and power emergency repair work. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the Г-type wire clamp device of this utility model;

[0012] Figure 2 This is a schematic diagram of the outer casing of the Г-type wire clamp device of this utility model;

[0013] Figure 3 This is a schematic diagram of the temperature monitoring device.

[0014] In the diagram, 1 is the G-type clamp body; 2 is the temperature monitoring device; 3 is the red alarm indicator rod; 4 is the screw hole for connection and fixation with the switch; 5 is the screw hole for connection with the cable terminal; 6 is the insulating sleeve of the G-type clamp body; 7 is the outlet from which the two red alarm indicator rods pop out; 8 is the inlet; 9 is the outlet; 10 is the cable terminal connection window; 11 is the switch connection window; 21 is the base; 22 is the stainless steel bracket; 23 is the bimetallic strip; 24 is the spring; 25 is the warning rod sleeve; 26 is the cover; and 27 is the warning rod cover. Detailed Implementation

[0015] The specific embodiments of this utility model are shown in the accompanying drawings.

[0016] A Г-type wire clamp device with temperature measurement function includes a Г-type wire clamp body 1, a temperature monitoring device 2, and a Г-type wire clamp body insulating sleeve 6.

[0017] like Figure 1 As shown, the Г-type clamp body 1 of this embodiment is a right-angled Г-shaped structure formed by bending a long rectangular copper plate. Two sets of screw holes are respectively opened at the middle of both ends of the right-angled rectangular copper plate along its length. One set of two screw holes is for connection and fixation with the switch knife switch 4, and the other set of two screw holes is for connection with the cable terminal 5. The temperature monitoring device 2 of this embodiment is installed on both sides of the screw hole 5 at one end of the Г-type clamp body 1 that connects to the cable terminal. The temperature monitoring device 2 contains a bimetallic structure and a red alarm indicator rod 3. Under normal temperature conditions, the bimetallic structure and the red alarm indicator rod cooperate and are locked together. When the temperature rises to a preset temperature, the bimetallic sheet deforms, and the cooperation between it and the red alarm indicator rod 3 automatically loosens. Under the action of a spring, the red alarm indicator rod 3 will be ejected.

[0018] like Figure 3 As shown, the temperature monitoring device 2 includes a base 21, a stainless steel bracket 22, a bimetallic strip 23, a spring 24, a warning bar sleeve 25, and a housing.

[0019] like Figure 3As shown, the temperature monitoring device in this embodiment includes a base 21, a stainless steel bracket 22, a bimetallic strip 23, a spring 24, and a warning bar sleeve 25. The device is installed inside a rectangular shell. The base is a U-shaped structure with unequal heights, with the left and right sides very close together. The warning bar sleeve is installed on the left side, and the bimetallic strip and stainless steel bracket are installed on the right side, in a vertical position. The base is installed inside the shell. The warning bar sleeve is a cylindrical structure with holes at both ends. One end is spring-loaded onto the cylinder on the left side of the base, and the other end is press-fitted to the indicator cover. The warning bar sleeve and the indicator cover form a red alarm indicator. The end of the warning bar sleeve furthest from the base is truncated cone-shaped, with the cross-sectional diameter of the larger end of the truncated cone larger than the cross-sectional diameter of the warning bar sleeve, forming a small step. The cross-sectional diameter of the smaller end of the truncated cone is equal to the cross-sectional diameter of the warning bar sleeve. The base is located on the right side. A stainless steel bracket and bimetallic strip structure are installed near the side of the warning bar sleeve. The stainless steel bracket is used to fix the bimetallic strip. One end of the stainless steel bracket extends laterally and connects to the step at one end of the warning bar sleeve to form a buckle, which restricts the movement of the warning bar sleeve under the action of the spring. When the bimetallic strip deforms due to heat, the buckle is affected by the deformation of the bimetallic strip and disengages from the step. The warning bar sleeve pushes out the indicator cover under the action of the spring. When the warning bar sleeve needs to be reset, simply press the protruding indicator cover lightly. The warning bar sleeve retracts, and the inclined surface of the truncated cone at the end of the warning bar sleeve presses against the buckle end of the stainless steel bracket until the buckle is locked in place by the horizontal elastic force of the stainless steel bracket.

[0020] like Figure 2 As shown, in this embodiment, the insulating sleeve 6 of the Г-type clamp body encloses the Г-type clamp body 1 and the temperature monitoring device 2.

[0021] The insulating sleeve 6 of the Г-type clamp body is Г-shaped, with an inlet 8 and an outlet 9 at each end. The wires that are connected and fixed to the switch knife switch are installed on the screw hole 4 through the inlet 8, and the cables that are connected to the cable terminal are installed on the screw hole 5 through the outlet 9.

[0022] The outer two narrow sides of the Г-type body insulation sleeve 6 are respectively provided with cable terminal connection window 10 and switch knife switch connection window 11. Both windows are equipped with sealing covers and are fixed by bolts. The Г-type clamp body insulation sleeve 6 can block rainwater intrusion and has a waterproof function.

[0023] In this embodiment, a switchable "door" can be provided between the inlet 8 and outlet 9 of the Г-type body insulating sleeve 6. When the Г-type clamp body needs to be replaced or repaired, simply remove the screws that close the "door" to open and remove it. When the Г-type clamp body is installed, tighten the screws that close the "door" and the sealing strip.

[0024] The working principle of the temperature monitoring device in this embodiment is as follows: The temperature monitoring device includes a base 21, a spring-loaded stainless steel bracket 22, a bimetallic strip 23, a spring 24, and a warning bar sleeve 25. The base mainly serves to fix the accessories and provide support. The stainless steel bracket is used to fix the bimetallic strip and makes contact with the warning bar. The spring provides support for the indicator bar to pop up. In this mechanical temperature measuring device, a high-precision bimetallic strip is selected as the temperature measuring actuating element. When the temperature of the bimetallic strip increases with the increase of the current flowing through the coil, the bimetallic strip will deform to different degrees due to the different coefficients of metal expansion, triggering the mechanical mechanism stainless steel bracket to react. The operating principle of the pop-out mechanism is as follows: Under normal circumstances, the other end of the stainless steel bracket connected to the temperature-changing bimetallic strip is stuck at the top and tilted towards the limiting step at the bottom of the warning bar sleeve, so that the temperature-changing bimetallic strip abuts against the limiting step, and the warning sleeve will not pop out from the base sleeve due to the elastic force of the compressed spring. After the temperature of the online clamp rises, the thermochromic metal strip deforms, causing the buckle at the top of the stainless steel bracket connecting the thermochromic metal strip to separate from the limiting step at the bottom of the warning rod sleeve. As a result, the warning sleeve rod sleeve pops out from the base rod sleeve under the elastic force of the compression spring, thus serving as a warning.

[0025] The temperature monitoring device designed in this embodiment is intended to address the issue of high temperatures at the connection points between electrical equipment. These high temperatures can easily occur due to poor contact caused by large currents or thermal expansion and contraction, leading to increased resistance and heat generation. Furthermore, it is difficult for inspection personnel to detect these high temperatures. Therefore, by adding a measuring device, when the temperature exceeds a certain value, a red alarm indicator will activate, making it easy for inspection personnel to detect and take timely action.

Claims

1. A temperature measuring type of a Г type wire clamp device, characterized in that, The device includes a Г-type clamp body, a temperature monitoring device, and an insulating sleeve for the Г-type clamp body. The Г-type clamp body is a right-angled Г-shaped structure formed by bending a long rectangular copper plate. Two screw holes are respectively opened at the middle of both ends of the right-angled rectangular copper plate along its length. The temperature monitoring device is installed on both sides of the screw hole at one end of the Г-type clamp body. The temperature monitoring device is equipped with a bimetallic structure and a red alarm indicator rod. Under normal temperature conditions, the bimetallic structure and the red alarm indicator rod cooperate and lock together. When the temperature rises to a preset temperature, the bimetallic sheet will deform and automatically loosen its cooperation with the red alarm indicator rod. Under the action of a spring, the red alarm indicator rod will be popped out. The insulating sleeve for the Г-type clamp body encloses the Г-type clamp body and the temperature monitoring device.

2. The temperature measuring type of a Г type wire clamp device according to claim 1, wherein The insulating sleeve of the Г-type clamp body is Г-shaped, with an inlet and an outlet at each end; the two narrow sides of the Г-type clamp body are respectively provided with cable terminal connection window and switch knife switch connection window, and both windows are provided with sealing covers.

3. The temperature measuring type of a Г type wire clamp device according to claim 1, wherein The temperature monitoring device includes a base, a stainless steel bracket, a bimetallic strip, a spring, and a warning bar sleeve. The device is installed inside a rectangular shell. The base is a U-shaped structure with unequal heights. The warning bar sleeve is installed on the left side, and the bimetallic strip and stainless steel bracket are installed on the right side, with the left and right sides very close together. The warning bar sleeve is a cylindrical structure with holes at both ends. One end is spring-loaded onto the cylinder on the left side of the base, and the other end is press-fitted with the indicator bar cover. The end of the warning bar sleeve furthest from the warning bar sleeve is truncated cone-shaped. The cross-sectional diameter of the larger end of the truncated cone is larger than the cross-sectional diameter of the warning bar sleeve, forming a small step with the outer wall of the warning bar sleeve. The cross-sectional diameter of the smaller end of the truncated cone is equal to the cross-sectional diameter of the warning bar sleeve. A stainless steel bracket and bimetallic strip structure are installed on the right side of the base near the warning bar sleeve. The stainless steel bracket is used to fix the bimetallic strip. One end of the stainless steel bracket extends laterally and connects with the step at one end of the warning bar sleeve to form a buckle, which restricts the movement of the warning bar sleeve under the action of the spring.

4. The temperature measuring type of a Г type wire clamp device according to claim 3, wherein The warning bar sleeve and the indicator bar cover together form a red alarm indicator bar.

Images