A fixed temperature measuring device for a wye contact

Abstract

The utility model relates to a kind of fixed temperature measuring device for plum blossom contact, include bottom plate, U-shaped base being arranged at the bottom of bottom plate, temperature sensor being arranged at the top of bottom plate;The periphery of the bottom plate is provided with multiple mounting holes;The U-shaped base is in U shape, is provided with the mounting groove being communicated with the top of U-shaped base;The top of the U-shaped base is also respectively provided with the threaded hole corresponding with mounting hole on the both sides of mounting groove;The bottom of the U-shaped base is provided with the avoidance slot in one end;The U-shaped base and bottom plate form after installation back-shaped structure;The utility model fixes and installs temperature sensor on the contact finger of plum blossom contact by bottom plate and U-shaped base, not only installation firm, it is applicable to plum blossom contact of different manufacturers, and after installation, it does not exceed the maximum outer edge size of plum blossom contact.

Description

Technical Field

[0001] This utility model relates to the field of temperature sensor technology, and specifically to a fixed temperature measuring device for a plum blossom contact. Background Technology

[0002] The function of the plum blossom contact is to provide electrical connection between the moving and stationary contact arms of the switchgear circuit breaker and to provide a current path.

[0003] The load current in the switchgear needs to flow through the L-shaped contact. One end of the L-shaped contact is connected to the moving contact arm, and the other end to the stationary contact arm. Due to contact resistance, under the influence of a large load current, localized heating occurs at the connection point between the L-shaped contact and the moving and stationary contact arms, causing the temperature of the L-shaped contact to be significantly higher than that of other components within the switchgear. The L-shaped contact is the hottest component inside the switchgear and is the primary focus of temperature monitoring. Monitoring the temperature of the L-shaped contact has always been the core task of switchgear temperature monitoring.

[0004] Currently, there are numerous temperature measurement products and technologies available on the market for plum blossom-shaped contact points, such as... Temperature sensors described in CN220367873U, CN222652386U, and CN222027811U, etc., have the following consequences: when these temperature sensors are installed on the sprite contact, the body of the temperature sensor will exceed the original maximum outer edge of the sprite contact. This results in a shortened insulation distance between the sprite contact and the contact insulation sleeve, a decrease in insulation performance, and a huge safety hazard to the equipment.

[0005] Some temperature sensors achieve the goal of not exceeding the maximum outer edge size of the pentagonal contact, such as the bracket and switch cabinet temperature sensing device and pentagonal contact disclosed in the prior art CN202322529416.X. However, due to the elasticity of the two clamping arms when mounted on the contact fingers, the installation firmness cannot be guaranteed, and there is a risk that the sensor may become loose or even fall off. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fixed temperature measuring device for plum blossom contacts.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a fixed temperature measuring device for plum blossom contacts, comprising a base plate, a U-shaped base disposed at the bottom of the base plate, and a temperature sensor disposed at the top of the base plate; The base plate has multiple mounting holes around its perimeter; The U-shaped base is U-shaped and has a mounting groove that connects to the top of the U-shaped base; the top of the U-shaped base also has threaded holes on both sides of the mounting groove that correspond to the mounting holes; the bottom end of the U-shaped base has a clearance groove; after the U-shaped base and the base plate are installed, they form a U-shaped structure.

[0008] Preferably, a groove is provided in the middle of the top of the U-shaped base; The temperature sensor is fixed in the groove; The mounting holes are symmetrically arranged on both sides of the groove.

[0009] Preferably, the depth of the groove is 0.3mm to 0.5mm, and the width is slightly wider than the width of the temperature sensor.

[0010] Preferably, the temperature sensor includes a ceramic antenna and a temperature sensor chip; the temperature sensor chip is fixed on the ceramic antenna; the overall height of the ceramic antenna does not exceed 3mm.

[0011] Preferably, the temperature sensor chip is a passive temperature chip.

[0012] Preferably, the ceramic antenna is a dipole antenna and adopts an omnidirectional radiation mode.

[0013] Preferably, the length of the mounting groove is not less than 7mm.

[0014] Preferably, the mounting groove depth is set in two ways, one of which is less than 10.45 mm and the other is less than 12 mm.

[0015] Preferably, the top two sides of the U-shaped base are provided with protrusions; the threaded hole is provided on the top of the protrusions.

[0016] Preferably, both the base plate and the U-shaped base are made of copper plated with silver.

[0017] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: 1. The combination structure of the base plate and the U-shaped base, secured with screws, ensures a firm and reliable installation, avoiding the risk of the sensor becoming loose or falling.

[0018] 2. The U-shaped base design has two installation depths, which can be used with four specifications of plum blossom contacts with contact plate heights of 10.45mm, 11mm, 12mm and 13mm. It has strong versatility and reduces production and inventory costs.

[0019] 3. The temperature sensor is welded into the groove of the base plate. The groove can standardize the welding position and reduce the overall installation height, ensuring that the maximum outer edge size of the plum blossom contact equalizing spring is not exceeded after installation, thus ensuring insulation safety.

[0020] 4. The overall structure is compact and the temperature monitoring is accurate, making it suitable for long-term stable temperature monitoring of the plum blossom contacts in switch cabinets. Attached Figure Description

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings: Appendix Figure 1 This is a schematic diagram of the fixed temperature measuring device for plum blossom contacts according to the present invention. Appendix Figure 2 This is a schematic diagram of the structure of the bottom plate in this utility model; Appendix Figure 3 This is a schematic diagram of the U-shaped base in this utility model; Appendix Figure 4 This is a schematic diagram of the temperature sensor in this utility model; Appendix Figure 5 This is a schematic diagram of the installation of the fixed temperature measuring device for the plum blossom contact described in this utility model.

[0022] The components include: 1. Base plate; 11. Mounting hole; 12. Groove; 2. U-shaped base; 21. Mounting slot; 22. Threaded hole; 23. Clearance slot; 3. Temperature sensor; 31. Ceramic antenna; 32. Temperature sensor chip; 4. Screw; 5. Torx contact; 51. Contact finger. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Appendix Figure 1 The fixed temperature measuring device for plum blossom contacts described in this utility model includes a base plate 1, a U-shaped base 2, and a temperature sensor 3.

[0025] like Figure 2 As shown, the base plate 1 is made of silver-plated copper, with a groove 12 in its center. The groove 12 has a depth of 0.3mm to 0.5mm (preferably 0.4mm) and a width of 9.2mm, slightly wider than the width of the temperature sensor 3 (9mm). The groove 12 serves two purposes: first, to reduce the overall height of the sensor after installation; and second, to regulate the orientation and position of the temperature sensor 3 during the soldering process between the temperature sensor 3 and the base plate 1, ensuring that it does not shift significantly after the solder melts, thus guaranteeing the consistency of the soldered product. The base plate 1 has four mounting holes 11 around its perimeter for fixing it to the U-shaped base 2 using screws 4.

[0026] like Figure 3 As shown, Figure 3As shown, the U-shaped base 2 is U-shaped and made of silver-plated copper. The U-shaped base 2 has four threaded holes 22 around its perimeter, which match the four mounting holes 11 on the base plate 1, and are connected by screws 4. The bottom of the U-shaped base 2 has a clearance groove 23 with a length of not less than 7mm (e.g., 8mm) to ensure that the U-shaped base 2 does not interfere with the stationary contact when the pendulum contact is inserted to a depth of 25mm. The mounting groove 21 of the U-shaped base 2 is 3mm wide, matching the width of the contact finger 51.

[0027] The mounting groove 21 of the U-shaped base 2 has two mounting depth designs: one is 10.3mm (or 10.2mm or other sizes slightly lower than 10.45mm), and the other is 11.9mm (or 11.8mm or other sizes slightly lower than 12mm). The former is suitable for pendant contacts with contact heights of 10.45mm and 11mm, while the latter is suitable for pendant contacts with contact heights of 12mm and 13mm.

[0028] The reason for designing two installation depths is that the contact plate height has four specifications: 10.45mm, 11mm, 12mm, and 13mm. If the installation depth of the U-shaped base 2 is only made in one way, it can only be 10.3mm (or other dimensions slightly lower than 10.45mm). If the contact plate height is 13mm, then the exposed length of the mounting screw is 2.7mm. Since the mounting screw is an M1.6 screw, the exposed part is too long, which will affect the installation strength and pose a safety hazard. On the other hand, if each contact plate height is designed with one installation depth for the U-shaped base 2, it will cause trouble for production and inventory, and increase production costs. Therefore, designing two installation depths for the U-shaped base 2 balances the issues of installation strength and production cost.

[0029] like Figure 4 As shown, the temperature sensor 3 includes a ceramic antenna 31 and a temperature sensor chip 32. The temperature sensor chip 32 is soldered onto the ceramic antenna 31. The overall height of the ceramic antenna 31 does not exceed 3mm; it is a dipole antenna and uses an omnidirectional radiation mode. The temperature sensor chip 32 is a passive temperature chip, such as a surface acoustic wave (SAW) or RFID temperature chip.

[0030] The height of temperature sensor 3 shall not exceed 3mm. The thickness of the part of the base plate 1 where temperature sensor 3 is installed shall be 0.8mm. The maximum height after installation shall not exceed 3.8mm, which is 4mm lower than the height of the equalizing spring of the plum blossom contact. Ensure that after installation, temperature sensor 3 does not exceed the outer edge (equalizing spring) of the plum blossom contact 5. Figure 5 As shown.

[0031] During installation, select a U-shaped base 2 whose mounting groove 21 depth matches the height of the contact finger 51, and insert the mounting groove 21 of the U-shaped base 2 into the contact finger 51 of the plum blossom contact 5. Then, fasten the base plate 1 with the temperature sensor 3 to the U-shaped base 2 with screws 4. The entire sensor is fixed to the contact finger 51 by the U-shaped base 2, resulting in a stable structure, and the overall height is controlled within the equalizing spring, without affecting the insulation.

[0032] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. All technical solutions formed by equivalent transformations or equivalent substitutions fall within the scope of protection of this utility model.

Claims

1. A fixed temperature measuring device for a plum blossom contact, characterized in that: It includes a base plate, a U-shaped base at the bottom of the base plate, and a temperature sensor at the top of the base plate; The base plate has multiple mounting holes around its perimeter; The U-shaped base is U-shaped and has a mounting groove that connects to the top of the U-shaped base; the top of the U-shaped base also has threaded holes on both sides of the mounting groove that correspond to the mounting holes; the bottom end of the U-shaped base has a clearance groove; after the U-shaped base and the base plate are installed, they form a U-shaped structure.

2. The fixed temperature measuring device for a plum blossom contact as described in claim 1, characterized in that: A groove is provided in the middle of the top of the U-shaped base; The temperature sensor is fixed in the groove; The mounting holes are symmetrically arranged on both sides of the groove.

3. The fixed temperature measuring device for a plum blossom contact as described in claim 2, characterized in that: The groove has a depth of 0.3mm to 0.5mm and a width slightly wider than the temperature sensor width.

4. The fixed temperature measuring device for a plum blossom contact as described in claim 1, characterized in that: The temperature sensor includes a ceramic antenna and a temperature sensor chip; the temperature sensor chip is fixed on the ceramic antenna; the overall height of the ceramic antenna does not exceed 3mm.

5. The fixed temperature measuring device for a plum blossom contact as described in claim 4, characterized in that: The temperature sensor chip is a passive temperature chip.

6. The fixed temperature measuring device for a plum blossom contact as described in claim 4, characterized in that: The ceramic antenna is a dipole antenna and adopts an omnidirectional radiation mode.

7. The fixed temperature measuring device for a plum blossom contact as described in claim 1, characterized in that: The length of the mounting groove shall not be less than 7mm.

8. The fixed temperature measuring device for a plum blossom contact as described in claim 1, characterized in that: The mounting groove depth is set in two ways, one of which is less than 10.45mm and the other is less than 12mm.

9. The fixed temperature measuring device for a plum blossom contact as described in claim 1, characterized in that: The top two sides of the U-shaped base are provided with protrusions; the threaded hole is provided on the top of the protrusions.

10. The fixed temperature measuring device for a plum blossom contact as described in claim 1, characterized in that: Both the base plate and the U-shaped base are made of copper plated with silver.

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