Temperature sensor suitable for wedged contact

Abstract

The utility model relates to a temperature sensor suitable for a wedged contact. The temperature sensor comprises a mounting base, an outer cover and a temperature sensor body, the mounting base is made of a metal material and is fixed on the wedged contact through a bolt or a buckle structure of the wedged contact; the outer cover is made of a non-metal material and is fixed on the mounting base; the temperature sensor body is arranged in the outer cover and comprises a temperature sensor chip and an antenna; the temperature sensor chip adopts a passive temperature sensing chip; according to the utility model, the mounting base can be fixed on the wedge-shaped contact through the bolt or buckle structure of the wedge-shaped contact, so that the structure is simple, the mounting is simple and convenient, the hidden danger of collision with the wedge-shaped contact in the mounting process is avoided, and the temperature monitoring of the wedge-shaped contact is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature sensors, in particular to a temperature sensor suitable for a wedge-type contact. Background Art

[0002] Contacts are important parts of circuit breakers. Their function is to connect the moving contact arm and the stationary contact arm, providing an electrical connection channel between the two. Common forms of contacts include knife-type contacts, butt-type contacts, wedge-shaped (contact finger) contacts, and plug-in (plum blossom) contacts. These contacts have their own advantages and are suitable for different usage scenarios.

[0003] Wedge-shaped contacts, also known as finger contacts, have a simple structure, low cost, and high current tolerance. They are widely used in early medium and high voltage switchgear, such as Siemens' KYN18 series, and outdoor disconnectors, such as the GW4 series disconnectors.

[0004] At present, there is no dedicated temperature measuring device for wedge-shaped contacts on the market, and conventional contact temperature measuring devices are all designed around plum blossom contacts and are not suitable for wedge-shaped contacts, such as the temperature sensor based on CT power supply technology described in CN 210571056 U, where the CT power supply technology requires induction power supply from the main circuit through a closed-loop coil to power the temperature measurement circuit. Therefore, this temperature sensor based on CT power supply technology must clamp the power supply ring on the monitored object. In this way, the installation requires the power supply ring to be clamped on the wedge-shaped contact, and the wedge-shaped contact is open. Once the insertion position of the moving (static) contact docking with the wedge-shaped contact deviates, it will cause the contact and the CT power supply temperature sensor to collide, which will not only damage the temperature sensor, but also damage the docking contact, causing equipment failure. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a temperature sensor suitable for a wedge-type contact.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a temperature sensor adapted for a wedge-type contact, comprising a mounting base, an outer cover and a temperature sensor body;

[0007] The mounting base is made of metal and is fixed on the wedge-shaped contact by bolts or snap-on structures provided by the wedge-shaped contact;

[0008] The outer cover is made of non-metallic material and is fixed on the mounting base;

[0009] The temperature sensor body is arranged in the outer cover, and comprises a temperature sensor chip and an antenna; the temperature sensor chip is a passive temperature sensing chip.

[0010] Preferably, the mounting base is in the form of a sheet, and two fixing holes are arranged on its surface; the mounting base is fixed to the top surface of the wedge-shaped contact by means of bolts provided by the wedge-shaped contact passing through the two fixing holes; the outer cover and the temperature sensor body are arranged on the mounting base, and are staggered with the two fixing holes.

[0011] Preferably, the mounting base is L-shaped, including a horizontal portion and a vertical portion; two fixing holes are provided on the surface of the horizontal portion; the horizontal portion is fixed to the top surface of the wedge-shaped contact by means of bolts provided by the wedge-shaped contact passing through the two fixing holes; the outer cover and the temperature sensor body are arranged on the vertical portion.

[0012] Preferably, the mounting base is in an inverted U-shape, and inwardly bent barbed hooks are provided on both sides of the bottom; the mounting base is snap-connected with the wedge-shaped contacts through the barbed hooks on both sides; the outer cover and the temperature sensor body are arranged on the mounting base.

[0013] Preferably, the temperature sensor chip is an RFID temperature sensing chip or a SAW temperature sensing chip.

[0014] Preferably, the temperature sensor chip is welded on any one side of the length, width and height of the antenna.

[0015] Preferably, the antenna is a printed antenna, and the antenna substrate is made of a plate with a high dielectric constant and low loss.

[0016] Preferably, the outer cover is made of flame retardant, insulating and high temperature resistant material.

[0017] Preferably, the outer cover is bonded to the mounting base by glue; the bonding glue is conductive glue.

[0018] Preferably, the outer cover is directly fixed to the mounting base by means of rubber encapsulation.

[0019] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0020] The mounting base in the utility model can be fixed on the wedge-shaped contact by means of bolts or snap-on structures provided by the wedge-shaped contact. Not only is the structure simple and the installation is easy, but there is also no hidden danger of collision with the mating contact of the wedge-shaped contact during the installation process, thereby realizing temperature monitoring of the wedge-shaped contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0022] Attached Figure 1 This is an exploded view of the first embodiment of the present utility model;

[0023] Attached Figure 2This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0024] Attached Figure 3 This is a schematic diagram of the structure of the mounting base in the second embodiment of the present utility model;

[0025] Attached Figure 4 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0026] Attached Figure 5 This is a schematic diagram of the structure of the mounting base in the third embodiment of the present utility model;

[0027] Attached Figure 6 This is a schematic diagram of the structure of the third embodiment of the present invention.

[0028] Among them: 1. mounting base; 11. fixing hole; 12. horizontal part; 13. vertical part; 14. barb part; 2. outer cover; 3. temperature sensor chip; 4. antenna; 5. wedge-shaped contact; 51. bolt. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Example

[0030] Attached Figure 1-2 The temperature sensor adapted to the wedge-type contact of the utility model comprises a mounting base 1, an outer cover 2 and a temperature sensor body;

[0031] The mounting base 1 is made of metal (copper with silver plating is preferred for wedge-shaped contacts used indoors; copper with zinc plating is preferred for wedge-shaped contacts used outdoors). The mounting base 1 is in the form of a sheet, and two fixing holes 11 are provided on its surface. The mounting base 1 is fixed to the top surface of the wedge-shaped contact 5 through the two fixing holes 11 by bolts 51 provided by the wedge-shaped contact 5. The outer cover 2 and the temperature sensor body are arranged on the mounting base 1, and are staggered with the two fixing holes 11.

[0032] The outer cover 2 is made of non-metallic material and is fixed on the mounting base 1;

[0033] The temperature sensor body is arranged in the outer cover 2, and includes a temperature sensor chip 3 and an antenna 4; the temperature sensor chip 3 is a passive temperature sensing chip.

[0034] Furthermore, the temperature sensor chip 3 is an RFID temperature sensing chip or a SAW temperature sensing chip; preferably, the RFID temperature sensing chip.

[0035] Furthermore, the temperature sensor chip 3 is welded to any side of the length, width and height of the antenna 4 , and the welding position depends on the design of the antenna 4 .

[0036] Furthermore, the antenna 4 shown is a printed antenna, and the antenna substrate is selected from a plate with a high dielectric constant and low loss, preferably a ceramic substrate.

[0037] Furthermore, the outer cover 2 is made of a flame retardant, insulating, high temperature resistant material, preferably polyimide.

[0038] Furthermore, the outer cover 2 is bonded to the mounting base 1 by conductive adhesive; the inner space of the outer cover 2 is slightly larger than the sensor body and does not interfere with the sensor body after installation.

[0039] Furthermore, the outer cover 2 is directly fixed on the mounting base 1 by means of rubber coating, so that the outer cover 2 forms a whole.

[0040] Furthermore, the thickness of the mounting base 1 is as thin as possible while ensuring structural strength, preferably 0.5 mm.

[0041] Furthermore, the width of the mounting base 1 is slightly smaller than the width of the wedge-shaped contact 5 .

[0042] Furthermore, the length of the mounting base 1 is required to ensure that the sensor body does not interfere with the bolts 51 , washers and mounting tools of the wedge-shaped contacts 5 after installation.

[0043] Furthermore, the mounting base 1 is rounded on all sides to avoid tip discharge.

[0044] Furthermore, the position of the fixing hole 11 in the mounting base 1 matches the position of the bolt 51 provided on the wedge-shaped contact 5 .

[0045] Furthermore, the diameter of the fixing hole 11 of the mounting base 1 is at least 1 mm larger than the diameter of the bolt 51 of the wedge-shaped contact 5, so as to leave room for the expansion of the wedge-shaped contact 5 when docking.

[0046] Furthermore, the diameter of the central fixing hole 11 of the mounting base 1 is at least 2 mm smaller than the diameter of the fixing pad of the wedge-shaped contact 5 to ensure the force-bearing area.

[0047] Before installation, the sensor body and the outer cover 2 are first fixed on the mounting base 1 to form a complete sensor;

[0048] During installation, first remove the bolts 51 and gaskets of the wedge-shaped contacts 5, align the fixing holes 11 on the mounting base plate with the contact fastening bolt holes, insert the gaskets and bolts 51, and then tighten the bolts to complete the installation. Example

[0049] like Figure 3-4As shown, the difference from the first embodiment is that the mounting base 1 is L-shaped, including a horizontal portion 12 and a vertical portion 13; the two fixing holes 11 are arranged on the surface of the horizontal portion 12; the horizontal portion 12 is fixed to the top surface of the wedge-shaped contact 5 by means of bolts 51 provided by the wedge-shaped contact 5 passing through the two fixing holes 11; the outer cover 2 and the temperature sensor body are arranged on the vertical portion 13.

[0050] Furthermore, the width of the horizontal portion 12 is as wide as possible without causing interference, in order to enhance the firmness of the installation, while increasing the contact area with the contact fingers of the wedge-shaped contact 5 and more accurately conducting the heat on the contact fingers.

[0051] Furthermore, the height of the vertical portion 13 is slightly greater than that of the sensor cover 2 .

[0052] Furthermore, the width of the vertical portion 13 is the same as the width of the horizontal portion 12 .

[0053] Furthermore, the four corners of the vertical portion 13 and the horizontal portion 12 are chamfered to avoid sharp corners. Example

[0054] like Figure 5-6 As shown, the difference from the first embodiment is that the mounting base 1 is in an inverted U-shape, and inwardly bent hook portions 14 are provided on both sides of the bottom; the mounting base 1 is snap-connected with the wedge-shaped contact 5 through the hook portions 14 on both sides; the outer cover 2 and the temperature sensor body are arranged on the mounting base 1.

[0055] Furthermore, the length of the mounting base 1 is slightly smaller than the width of the wedge-shaped contact 5, ensuring that the two are in close contact after installation.

[0056] Furthermore, the width of the mounting base 1 is slightly wider than the width of the outer cover 2, so as to ensure normal encapsulation or installation of the outer cover 2.

[0057] Furthermore, the bending length of the barb portion 14 is not less than 5 mm.

[0058] The above are only specific application examples of the utility model, and do not constitute any limitation on the protection scope of the utility model. Any technical solution formed by equivalent transformation or equivalent replacement falls within the protection scope of the utility model.

Claims

1. A temperature sensor adapted for a wedge-type contact, characterized in that: It includes a mounting base, an outer cover and a temperature sensor body; The mounting base is made of metal and is fixed on the wedge-shaped contact by bolts or snap-on structures provided by the wedge-shaped contact; The outer cover is made of non-metallic material and is fixed on the mounting base; The temperature sensor body is arranged in the outer cover, and comprises a temperature sensor chip and an antenna; the temperature sensor chip is a passive temperature sensing chip.

2. The temperature sensor adapted for a wedge-type contact according to claim 1, characterized in that: The mounting base is in the form of a sheet, and two fixing holes are arranged on its surface; the mounting base is fixed to the top surface of the wedge-shaped contact by means of bolts provided by the wedge-shaped contact passing through the two fixing holes; the outer cover and the temperature sensor body are arranged on the mounting base, and are staggered with the two fixing holes.

3. The temperature sensor adapted for a wedge-type contact according to claim 1, characterized in that: The mounting base is L-shaped, including a horizontal portion and a vertical portion; two fixing holes are arranged on the surface of the horizontal portion; the horizontal portion is fixed to the top surface of the wedge-shaped contact by means of bolts provided by the wedge-shaped contact passing through the two fixing holes; the outer cover and the temperature sensor body are arranged on the vertical portion.

4. The temperature sensor adapted for a wedge-type contact according to claim 1, characterized in that: The mounting base is in an inverted U shape, and inwardly bent hooks are arranged on both sides of the bottom; the mounting base is snap-connected with the wedge-shaped contacts through the hooks on both sides; the outer cover and the temperature sensor body are arranged on the mounting base.

5. The temperature sensor adapted for a wedge-type contact according to any one of claims 1 to 4, characterized in that: The temperature sensor chip adopts an RFID temperature sensing chip or a SAW temperature sensing chip.

6. The temperature sensor adapted for a wedge-type contact according to claim 5, characterized in that: The temperature sensor chip is welded on any one side of the length, width and height of the antenna.

7. The temperature sensor adapted for a wedge-type contact according to any one of claims 1 to 4, characterized in that: The antenna shown is a printed antenna, and the antenna substrate is made of a high dielectric constant and low loss board.

8. The temperature sensor adapted for a wedge-type contact according to any one of claims 1 to 4, characterized in that: The outer cover is made of flame-retardant, insulating and high-temperature resistant material.

9. The temperature sensor adapted for a wedge-type contact according to claim 8, characterized in that: The outer cover is bonded to the mounting base by conductive adhesive.

10. The temperature sensor adapted for a wedge-type contact according to claim 8, characterized in that: The outer cover directly fixes the temperature sensor body on the mounting base in a rubber-wrapped manner.

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