Temperature warning device for outdoor isolation knife switch contact

Abstract

The utility model relates to the field of electrical early warning, in particular to a temperature warning device for an outdoor isolation knife switch contact, which comprises a device body and a temperature-sensing deformation sheet, the device body is provided with an installation space and an opening communicated with the installation space, the installation space is provided with an indication board, and the temperature-sensing deformation sheet is arranged on the indication board. The temperature-sensing deformation sheet is connected with the device body in a limiting manner; the temperature sensing deformation piece and the opening are located on the two sides of the indication board respectively, the temperature sensing deformation piece can deform to abut against and push the indication board to move towards the opening, and the indication board can move in and / or move out of the opening; the device body is attached to the contact of the isolation switch, the indicator is pushed through deformation of the temperature sensing deformation piece, the indicator is moved out of the installation space from the opening, operation and maintenance personnel can determine the temperature condition of the contact by observing the state of the indicator, the fault recognition and diagnosis efficiency of the operation and maintenance personnel is remarkably improved, and the fault diagnosis efficiency is improved. And the operation reliability of the outdoor high-voltage isolation switch is effectively enhanced.

Description

Technical Field

[0001] The utility model relates to the field of electrical early warning, in particular to a temperature warning device for outdoor isolation knife switch contacts. Background Art

[0002] High-voltage isolation switches are mainly used for circuit isolation and safety inspection in 10KV outdoor high-voltage transmission and distribution lines and substations. When the isolation switch is closed, the moving contact and the static contact are in close contact to form a conductive path. When the switch is open, the moving contact and the static contact are separated to cut off the circuit. Due to the long-term operation of outdoor high-voltage isolation switches and frequent switching, the moving contact and the static contact are often opened and closed, resulting in surface wear of the moving contact and the static contact, reduced contact area and increased contact resistance. In severe cases, the contact surfaces of the moving contact / static contact may be eroded, welded and have arc faults.

[0003] However, abnormal contact points of moving contacts / static contacts are difficult to detect through routine visual inspection. Although existing technologies such as remote online monitoring systems for outdoor isolation switches and body health monitoring can provide certain monitoring support, their actual application is limited in mountainous and hilly areas with complex terrain and insufficient network signal coverage, and the construction cost of online monitoring systems is high.

[0004] Therefore, there is an urgent need for a technical solution to solve the technical problem that the abnormality of the moving contact / static contact is difficult to monitor in areas where network signal coverage is insufficient. Utility Model Content

[0005] The purpose of the utility model is to provide a temperature warning device for outdoor isolation knife switch contacts to solve the technical problem that abnormal contact points of moving contacts / static contacts are difficult to monitor in areas with insufficient network signal coverage.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A temperature warning device for outdoor isolation knife switch contacts, comprising a device body and a temperature-sensitive deformation sheet, wherein the device body is provided with an installation space and an opening communicating with the installation space, the installation space is provided with an indication sign, and the temperature-sensitive deformation sheet is limitedly connected to the device body;

[0008] The temperature-sensitive deformation sheet and the opening are respectively located on two sides of the indicator plate. The temperature-sensitive deformation sheet can be deformed to push the indicator plate to move toward the opening, and the indicator plate can be moved into and / or out of the opening.

[0009] The utility model discloses a temperature warning device for outdoor isolation knife switch contacts. The device body is fitted at the contact of the isolation knife switch. The temperature-sensitive deformation sheet can be deformed by the temperature change of the contact under the action of thermal radiation. The deformed temperature-sensitive deformation sheet pushes the indicator board to move the indicator board out of the installation space from the opening, so that the operation and maintenance personnel can observe the content on the indicator board through visual inspection and determine the temperature of the contact from the state of the indicator board, which significantly improves the efficiency of the operation and maintenance personnel in identifying and diagnosing faults and effectively enhances the operating reliability of the outdoor high-voltage isolation knife switch.

[0010] As a preferred solution of the utility model, a rotating shaft is arranged in the installation space, and the sign is slidably arranged on the rotating shaft. The rotating shaft can guide the sliding direction of the sign, and the sign can slide to the opening and fall out of the installation space by sliding the sign along the axial direction of the rotating shaft.

[0011] As a preferred solution of the utility model, the sign includes a circular plate, the circular plate is eccentrically arranged with respect to the rotating shaft, and the rotating shaft is rotatably connected with the circular plate. The circular plate can rotate around the rotating shaft, and the eccentric arrangement enables the circular plate to fall out of the installation space through the opening.

[0012] As a preferred solution of the utility model, an extension part is provided along the radial direction of the circular plate, and the rotation shaft passes through the extension part. The extension part is provided to connect the rotation shaft, so that the display range of the circular plate is larger, which is convenient for operators to observe.

[0013] As a preferred solution of the utility model, the installation space includes a bottom wall, a side wall and a top wall, the opening passes through the side wall, and the bottom wall is provided with the temperature-sensitive deformation sheet. The indicator board can abut against the side wall of the installation space, so that the indicator board is not easy to fall out of the installation space; the temperature-sensitive deformation sheet provided on the bottom wall pushes the indicator board, so that the indicator board is separated from the side wall and can fall out of the installation space from the opening.

[0014] As a preferred solution of the utility model, a mounting groove is provided on the bottom wall, and the temperature-sensitive deformation sheet is embedded in the mounting groove. When the temperature-sensitive deformation sheet is radiated with high temperature, the temperature-sensitive deformation sheet can be deformed so that the temperature-sensitive deformation sheet protrudes from the mounting groove and can push the indicator plate to move toward the opening side.

[0015] As a preferred solution of the utility model, the installation slot includes a through slot, and the through slot passes through the device body. The temperature-sensitive deformation sheet is in direct contact with the isolation knife switch, and the temperature-sensitive deformation sheet can more sensitively sense the temperature change of the contact of the isolation knife switch.

[0016] As a preferred solution of the utility model, a torsion spring is provided on the rotating shaft, one end of the torsion spring is connected to the indicator sign, and the other end is connected to the device body. When the indicator sign is set in the installation space, under the action of the torsion spring, the edge of the indicator sign can abut against the side wall of the installation space, and the indicator sign is not easy to loosen from the installation space through the action of friction; when the temperature-sensitive deformation sheet pushes the indicator sign to the opening, the torsion spring can push the indicator sign to pop out of the opening; the end of the torsion spring is set to a smooth surface, so that the torsion spring can slide on the device body; the torsion spring is suitable for installation in a narrow space, and the connecting ring can slide along the axial direction of the rotating shaft; in some embodiments, no torsion spring is provided, the indicator sign is in clearance with the installation space, and when the indicator sign is pushed to the opening, it moves out of the opening under the action of gravity.

[0017] As a preferred solution of the utility model, the opening comprises a strip-shaped opening, the width of which is greater than the thickness of the sign, so that the sign can be moved into or out of the strip-shaped opening.

[0018] As a preferred solution of the utility model, the temperature-sensitive deformation sheet includes a rectangular structure, and both sides of the rectangular structure in the length direction are provided with limiting parts, and the limiting parts are connected to the device body in a limiting manner. By fixing both sides of the rectangular structure in the length direction on the device body, when the temperature-sensitive deformation sheet is deformed, the middle part of the rectangular structure protrudes to push the indicator plate.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0020] 1. The utility model discloses a temperature warning device for outdoor isolation knife switch contacts. The device body is fitted at the contact of the isolation knife switch. The temperature-sensitive deformation sheet can be deformed by the temperature change of the contact under the action of thermal radiation. The deformed temperature-sensitive deformation sheet pushes the indicator board, so that the indicator board is moved out of the installation space from the opening, so that the operation and maintenance personnel can observe the content on the indicator board through visual inspection and determine the temperature of the contact from the state of the indicator board, which significantly improves the efficiency of the operation and maintenance personnel in identifying and diagnosing faults and effectively enhances the operational reliability of the outdoor high-voltage isolation knife switch.

[0021] 2. The utility model provides a temperature warning device for outdoor isolation knife switch contacts, which has a simple structure, is easy to manufacture, and is convenient to use. It gets rid of excessive reliance on complex remote online monitoring systems and significantly reduces cost investment. Operation and maintenance personnel can accurately determine whether the isolation knife switch contacts have abnormal conditions such as overheating and oxidation by visually checking the indicator signs. By adopting a temperature warning device for outdoor isolation knife switch contacts, it not only helps to significantly improve the efficiency of operation and maintenance personnel in identifying and diagnosing faults, but also effectively enhances the operational reliability of the isolation knife switch, effectively prevents and reduces power outages caused by contact failures, and ensures the stable operation of the power system. It has good economic value and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a temperature warning device for outdoor isolation knife switch contacts in Example 1;

[0023] Figure 2 is a schematic diagram of the structure of the signboard of Example 1;

[0024] Figure 3 is a schematic cross-sectional structural diagram of the device body of Example 1;

[0025] Figure 4 is a schematic cross-sectional structural diagram of the device body of Example 1;

[0026] Figure 5 is a schematic diagram of the installation position of the temperature-sensitive deformation sheet of Example 1;

[0027] Figure 6 is a schematic structural diagram of a torsion spring of Example 1;

[0028] Figure 7 3 is a schematic structural diagram of a temperature warning device for outdoor isolation knife switch contacts in Example 3;

[0029] Figure 8 It is a schematic diagram of the structure of the signboard of Example 3.

[0030] icon:

[0031] 1-device body, 2-indicator plate, 3-opening, 4-installation space, 5-rotation axis, 6-installation slot, 7-torsion spring, 8-temperature-sensitive deformation sheet, 9-abutment member, 41-bottom wall, 42-side wall, 43-top wall. DETAILED DESCRIPTION

[0032] The utility model is described in detail below in conjunction with the accompanying drawings.

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] Example 1

[0035] like Figure 1-Figure 6 A temperature warning device for outdoor isolation knife switch contacts is shown, comprising a device body 1 and a temperature-sensitive deformation piece 8, wherein the device body 1 is provided with an installation space 4 and an opening 3 connected to the installation space 4, the installation space 4 is provided with an indicator sign 2, and the temperature-sensitive deformation piece 8 is limitedly connected to the device body 1;

[0036] The temperature-sensitive deformation sheet 8 and the opening 3 are respectively located on two sides of the sign 2 . The temperature-sensitive deformation sheet 8 can be deformed to push the sign 2 toward the opening 3 , and the sign 2 can be moved into and / or out of the opening 3 .

[0037] The device body 1 is fitted at the contact of the isolating knife switch. The temperature-sensitive deformable sheet 8 can be deformed by the temperature change of the contact under the action of thermal radiation. The deformed temperature-sensitive deformable sheet 8 pushes the indicator sign 2, so that the indicator sign 2 is moved out of the installation space 4 from the opening 3, so that the operation and maintenance personnel can observe the content on the indicator sign 2 through visual inspection, and determine the temperature of the contact from the state of the indicator sign 2, which significantly improves the efficiency of the operation and maintenance personnel in identifying and diagnosing faults and effectively enhances the operating reliability of the outdoor high-voltage isolating knife switch.

[0038] Specifically, the device body 1 is a cylindrical box body, in which a cylindrical installation space 4 is arranged, and the sign 2 is constructed as a circular plate, the edge of the circular plate abuts against the side wall 42 of the installation space 4, so that the circular plate is clamped in the installation space 4 to prevent the circular plate from loosening.

[0039] Specifically, a rotating shaft 5 is arranged in the installation space 4, and the rotating shaft 5 penetrates the circular plate along the axial direction of the circular plate, and the setting position of the rotating shaft 5 on the circular plate is far away from the center of the circular plate, so that the circular plate can display more content after falling out of the installation space 4, so that the operation and maintenance personnel can more easily observe the changes in the usage status of the temperature warning device of the outdoor isolation knife switch contact; the circular plate can slide on the rotating shaft 5 along the axial direction of the rotating shaft 5, so that the temperature-sensitive deformation sheet 8 can push the circular plate so that the circular plate is located toward the opening 3.

[0040] Specifically, the installation space 4 includes a bottom wall 41, a top wall 43 and a side wall 42, the opening 3 is a strip-shaped opening, the strip-shaped opening is opened on the side wall 42, so that the length of the opening 3 of the strip-shaped opening is greater than the diameter of the circular plate, the width of the strip-shaped opening is greater than the thickness of the sign 2, and the strip-shaped opening needs to ensure that the circular plate has sufficient rotation range so that the circular plate can display the warning content; an installation groove 6 is opened on the bottom wall 41, and the installation groove 6 is a through groove that penetrates the box body, so that one side of the temperature-sensitive deformation sheet 8 contacts the isolation knife gate and the other side abuts the circular plate, so that the temperature-sensitive deformation sheet 8 isolates the knife gate The temperature-sensitive deformation piece 8 is more sensitive to temperature changes; a temperature-sensitive deformation piece 8 is adapted to be arranged in the installation groove 6, so that the temperature-sensitive deformation piece 8 is detachably connected to the box body; the temperature-sensitive deformation piece 8 is a rectangular structural member, and limiting parts are arranged on both sides of the length direction of the rectangular structural member. The limiting parts are fixed to the box body by bolts, so that the middle part of the rectangular structural member is embedded in the through groove. When the temperature-sensitive deformation piece 8 is affected by high temperature, the middle part of the temperature-sensitive deformation piece 8 will bulge toward the side where the circular plate is arranged, thereby pushing the circular plate to move toward the side of the top wall 43, so that the circular plate is moved out from the opening 3 arranged on the side of the top wall 43.

[0041] Specifically, a torsion spring 7 is arranged on the rotating shaft 5, one end of the torsion spring 7 abuts against the device body 1, and the other end abuts against the circular plate; when the indicator sign 2 is set in the installation space 4, under the action of the torsion spring 7, the edge of the indicator sign 2 can abut against the side wall 42 of the installation space 4, and under the action of friction, the indicator sign 2 is not easily loosened from the installation space 4; when the temperature-sensitive deformation sheet 8 pushes the indicator sign 2 to the opening 3, the torsion spring 7 can push the indicator sign 2 to pop out of the opening 3; an abutment 9 is arranged on the circular plate, so that one end of the torsion spring 7 abuts against the abutment 9, and the other end abuts against the side wall 42 of the installation space 4.

[0042] Specifically, under normal operation, the deformable sheet fits tightly to the surface of the indicator sign 2, and the indicator sign 2 is held in the installation space 4 by the force of the torsion spring 7, ensuring that it will not fall out of the opening 3 due to unexpected circumstances; when the temperature of the isolating knife switch contact rises to a certain range, the temperature-sensitive deformable sheet 8 increases in volume and bends outward due to the thermal expansion effect, thereby abutting against the indicator sign 2 and moving toward the opening 3 until the indicator sign 2 is pushed out of the installation space 4, thereby realizing an intuitive alarm of temperature exceeding the limit.

[0043] Example 2

[0044] The temperature warning device for outdoor isolation knife switch contacts of this embodiment has a structure substantially the same as that of the embodiment 1. The difference from the embodiment 1 is that the torsion spring 7 is not provided on the rotating shaft 5.

[0045] Specifically, the installation space 44 cooperates with the gap of the circular plate to limit the position of the circular plate.

[0046] Specifically, the circular plate can be moved out of the opening 3 under the action of gravity.

[0047] Example 3

[0048] like Figure 7-Figure 8 The temperature warning device for outdoor isolation knife switch contacts shown in the figure has a structure substantially the same as that of Embodiment 1. The difference from Embodiment 1 is that a radial extension portion is provided on the circular plate, and the rotating shaft 5 passes through the extension portion.

[0049] Specifically, by providing the extension portion, the display range of the circular plate is expanded.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature warning device for outdoor isolation knife switch contacts, characterized in that: The device comprises a device body (1) and a temperature-sensitive deformation sheet (8), wherein the device body (1) is provided with an installation space (4) and an opening (3) communicating with the installation space (4), the installation space (4) is provided with an indication sign (2), and the temperature-sensitive deformation sheet (8) is position-limitingly connected to the device body (1); The temperature-sensitive deformable sheet (8) and the opening (3) are respectively located on two sides of the sign (2); the temperature-sensitive deformable sheet (8) can be deformed to push the sign (2) toward the opening (3); and the sign (2) can be moved into and / or out of the opening (3).

2. A temperature warning device for outdoor isolation knife switch contacts as claimed in claim 1, characterized in that: A rotating shaft (5) is arranged in the installation space (4), and the indicator board (2) is slidably arranged on the rotating shaft (5).

3. A temperature warning device for outdoor isolation knife switch contacts as claimed in claim 2, characterized in that: The sign (2) comprises a circular plate, the circular plate is eccentrically arranged with respect to the rotating shaft (5), and the rotating shaft (5) is rotatably connected with the circular plate.

4. A temperature warning device for outdoor isolation knife switch contacts as claimed in claim 3, characterized in that: An extension portion is provided along the radial direction of the circular plate, and the rotating shaft (5) passes through the extension portion.

5. A temperature warning device for outdoor isolation knife switch contacts as claimed in claim 1, characterized in that: The installation space (4) comprises a bottom wall (41), a side wall (42) and a top wall (43); the opening (3) passes through the side wall (42); and the temperature-sensitive deformation sheet (8) is provided on the bottom wall (41).

6. A temperature warning device for outdoor isolation knife switch contacts as claimed in claim 5, characterized in that: The bottom wall (41) is provided with a mounting groove (6), and the temperature-sensitive deformation sheet (8) is embedded in the mounting groove (6).

7. A temperature warning device for outdoor isolation knife switch contacts as claimed in claim 6, characterized in that: The installation groove (6) comprises a through groove, and the through groove passes through the device body (1).

8. A temperature warning device for outdoor isolation knife switch contacts as claimed in claim 2, characterized in that: The rotating shaft (5) is provided with a torsion spring (7), one end of the torsion spring (7) is connected to the indicator board (2), and the other end is connected to the device body (1).

9. A temperature warning device for outdoor isolation knife switch contacts as claimed in claim 1, characterized in that: The opening (3) comprises a strip-shaped opening, the width of which is greater than the thickness of the sign (2).

10. A temperature warning device for outdoor isolation knife switch contacts as claimed in claim 1, characterized in that: The temperature-sensitive deformation sheet (8) comprises a rectangular structural member, and limiting portions are provided on both sides of the rectangular structural member in the length direction, and the limiting portions are connected to the device body (1) in a limiting manner.

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