Plum blossom contact with temperature measuring device

Abstract

The utility model relates to a tulip contact with a temperature measuring device. The problems that an existing temperature measuring device for the tulip contact is troublesome to install and fix and short in service life are solved. The device comprises a support which is provided with a mounting groove; the moving contact piece is arranged in the mounting groove of the bracket and is used for being connected with the static contact; the number of the movable contact pieces is multiple, different movable contact pieces are arranged on the support in an annular circumferential surrounding mode, and the different movable contact pieces are matched with one another to form a contact cavity. And the temperature measuring device is embedded on the movable contact piece and is used for temperature detection. The utility model has the beneficial effects that the temperature measuring device is directly embedded on the movable contact piece, the structure is simple, the installation is convenient, the movable contact piece can be detached for direct maintenance or replacement during maintenance, and the influence on equipment is small. The utility model also has the advantages of simple structure, convenience in assembly, reliable action, long service life and the like.

Description

Technical Field

[0001] This utility model relates to the field of power temperature monitoring technology, specifically to a plum blossom contact with a temperature measuring device. Background Technology

[0002] With the development of the power industry, various electrical equipment has increasingly higher requirements for the stability of the power system. As an important part of the system, switchgear is prone to problems such as aging and increased resistance of the contact parts of the circuit breaker's sprite contacts due to long-term operation. In severe cases, this can lead to breakdown or even fire, causing safety accidents. Therefore, it is necessary to monitor the temperature of the sprite contacts in real time.

[0003] Currently, wireless temperature measurement devices using plum blossom contacts are available in the industry. These devices involve installing signal collection devices inside or outside the switchgear, transmitting the signals collected by the wireless temperature measurement device wirelessly to the collection device for feedback to the system. However, existing wireless temperature measurement devices using plum blossom contacts have various installation and fixing problems. Most wireless temperature measurement devices are fixed using standard parts such as bolts and nuts or watchband-style fixing. Standard part fixing typically uses standard parts to fix the wireless temperature measurement device to the plum blossom contact or bracket. The disadvantages of standard part fixing are poor vibration resistance, numerous parts, and the tendency for standard parts to loosen or fall off during the contact and removal process between the plum blossom contact and the stationary contact, posing a significant safety hazard. Additionally, watchband-style wireless temperature measurement devices are usually located on the radial outer side of the moving contact surface. Their disadvantages include poor stability, and the watchband is prone to breakage, detachment, and displacement during use. Of course, there are also methods that embed the wireless temperature measuring device on the contact arm, with the plum blossom contact located at one end of the contact arm and driven by the contact arm to reciprocate. The disadvantage of this method is that it is troublesome to replace, requiring the entire moving contact piece to be removed for repair and replacement, which is time-consuming and laborious, and the measurement accuracy is poor. Utility Model Content

[0004] To address the problems of cumbersome installation and short service life of existing plum blossom contact temperature measuring devices in the background art, this utility model provides a plum blossom contact equipped with a temperature measuring device.

[0005] The technical solution of this utility model is: a plum blossom contactor equipped with a temperature measuring device, comprising:

[0006] The bracket is provided with a mounting groove.

[0007] The moving contact piece is located in the mounting groove of the bracket and is used to connect with the stationary contact. There are multiple moving contact pieces, which are arranged in a ring around the bracket, and the different moving contact pieces cooperate with each other to form a contact cavity.

[0008] The temperature measuring device is embedded in the moving contact plate and is used for temperature detection.

[0009] As a further improvement of this utility model, it also includes an inlay groove, which is located in the middle of the moving contact piece, and the temperature measuring device is inlaid in the inlay groove of the moving contact piece.

[0010] As a further improvement of this utility model, the temperature measuring device is adhered to the moving contact piece by adhesive.

[0011] As a further improvement of this utility model, the movable contact piece is formed by two pieces forming a movable contact piece group, the bracket is provided with multiple groups of movable contact pieces, and there are multiple temperature measuring devices, with different temperature measuring devices set on different groups of movable contact pieces.

[0012] As a further improvement of this utility model, the inlay groove is provided on the side of the moving contact piece and extends through the group of moving contact pieces along the thickness direction of the moving contact piece.

[0013] As a further improvement of this utility model, the cross-sectional area of ​​the movable contact piece for current flow at the inlay groove is not less than the cross-sectional area of ​​the narrowest part of the movable contact piece for current flow.

[0014] As a further improvement of this utility model, the moving contact piece is provided with a locking block and an arc-shaped part. The locking block and the arc-shaped part are respectively provided on both sides of the moving contact piece, and the arc-shaped parts of different moving contact pieces are all arranged facing the stationary contact. The area of ​​the contact cavity formed at the arc-shaped part of different moving contact pieces is larger than the area of ​​the contact cavity formed at different locking blocks.

[0015] As a further improvement of this utility model, the bracket includes a first frame and a second frame, the first frame and the second frame are connected by a connecting column, and the movable contact piece is disposed between the first frame and the second frame.

[0016] As a further improvement of this utility model, the movable contact piece is provided with a slot, the locking block is located below the first frame and facing the contact cavity for vertical positioning of the movable contact piece, and the slot is engaged with the second frame for positioning of the movable contact piece.

[0017] As a further improvement of this utility model, the movable contact piece is provided with a receiving groove, and an elastic element is provided in the receiving groove. The elastic element surrounds the outside of the movable contact piece and has a tendency to drive the movable contact piece to move inward to reduce the contact cavity.

[0018] As a further improvement of this utility model, the receiving groove is arranged in an arc shape, and two receiving grooves are arranged as a group, and at least four receiving grooves are arranged in two groups at the upper and lower ends of the moving contact piece respectively.

[0019] The advantages of this invention are that the temperature measuring device is directly embedded in the moving contact plate, resulting in a simple structure, convenient installation, and the ability to disassemble and directly repair or replace the moving contact plate during maintenance with minimal impact on the equipment. This invention also boasts advantages such as simple structure, easy assembly, reliable operation, and long service life. Attached Figure Description

[0020] Appendix Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0021] Appendix Figure 2 This is an exploded structural diagram of an embodiment of the present invention.

[0022] Appendix Figure 3 This is an exploded structural diagram of the moving contact piece in an embodiment of the present invention.

[0023] In the figure, 1 is the bracket; 11 is the mounting groove; 12 is the first frame; 13 is the second frame; 14 is the connecting column; 2 is the moving contact piece; 21 is the contact cavity; 22 is the inlay groove; 23 is the locking block; 24 is the arc-shaped part; 25 is the locking groove; 26 is the receiving groove; 3 is the temperature measuring device; and 4 is the elastic element. Detailed Implementation

[0024] The embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0025] Depend on Figure 1 Combination Figure 2-3 As shown, a plum blossom contactor equipped with a temperature measuring device includes:

[0026] The bracket 1 is provided with a mounting groove 11;

[0027] The movable contact 2 is disposed in the mounting groove 11 of the bracket and is used to connect with the stationary contact. There are multiple movable contact 2 pieces, and different movable contact 2 pieces are arranged in a ring around the bracket 1. The different movable contact 2 pieces cooperate with each other to form a contact cavity 21.

[0028] Temperature measuring device 3 is embedded in the moving contact 2 and is used for temperature detection. The advantages of this invention are that by directly embedding the temperature measuring device in the moving contact, the structure is simple, installation is convenient, and the moving contact can be disassembled for direct repair or replacement during maintenance, minimizing impact on the equipment. This invention also has the advantages of simple structure, convenient assembly, reliable operation, and long service life.

[0029] This utility model also includes an inlay groove 22, located in the middle of the moving contact piece 2, and the temperature measuring device 3 is inlaid in the inlay groove 22 of the moving contact piece 2. Specifically, the temperature measuring device 3 is adhered to the moving contact piece 2 with adhesive. In this utility model, the temperature measuring device is inlaid in the inlay groove and then sealed with adhesive, resulting in a simple structure, convenient and reliable fixing, and without protruding beyond the plum blossom contact, thus not affecting other components or heat dissipation. Specifically, the temperature measuring device can be a wireless temperature measuring device, such as an RFID temperature measurement and acquisition device (sensor). Specifically, the RFID temperature measurement and acquisition device can be an RFID passive temperature sensor of model CLMD-800RF produced by Zhejiang Chenlu Electric Power Technology Co., Ltd. (our company). Usually, the receiver of the RFID passive temperature sensor is set on the cabinet wall, and the data received by the receiver is fed back to the system. Of course, passive temperature sensors produced by other companies can also be used. Other types of sensors, such as tuning fork temperature sensors and ceramic anti-metal temperature sensors, can also be used.

[0030] The movable contact piece 2 is arranged in pairs to form a movable contact piece group. Multiple groups of movable contact pieces are mounted on the bracket 1. Multiple temperature measuring devices 3 are present, with different devices mounted on different groups of movable contact pieces. Specifically, the inlay groove 22 is located on the side of the movable contact piece 2 and extends through the group of movable contact pieces along its thickness. This design does not affect the structure and installation of the movable contact piece, avoids protruding beyond the perforated contact head and affecting other components, and does not impede heat dissipation. The structure is simple and easy to assemble and disassemble. When a temperature measuring device is damaged, the movable contact piece can be removed and replaced with a new one to restore its use, avoiding the time and effort required to remove the contact arm. In actual production, temperature measuring devices can typically be installed at intervals between groups of movable contact pieces, or each group of movable contact pieces can be equipped with a temperature measuring device.

[0031] The cross-sectional area A of the movable contact 2 at the slot 22 for current flow is not less than the cross-sectional area B of the narrowest part of the movable contact 2 for current flow. (See Appendix) Figure 3 This ensures that even if the temperature sensing device is embedded inside the plum blossom contact (moving contact), it will not affect the conductivity of the copper busbar. Because the cross-sectional area A used for current conduction in the removed portion (the embedded slot) is larger than the cross-sectional area B of the narrowest current conduction point, according to the skin effect, the current will flow quickly from the side and will not affect the conductivity of the product.

[0032] The movable contact 2 is provided with a locking block 23 and an arc-shaped portion 24. The locking block 23 and the arc-shaped portion 24 are respectively located on both sides of the movable contact 2. The arc-shaped portions 24 of different movable contact 2 are all oriented towards the stationary contact. The area of ​​the contact cavity 21 formed at the arc-shaped portions 24 of different movable contact 2 (the area of ​​the contact cavity enclosed by the arc-shaped portions 24 of different movable contact 2) is larger than the area of ​​the contact cavity 21 formed (enclosed) at the locking block. This structure makes the arc-shaped portions of the movable contact close to the central axis of the plum blossom contact, so as to provide reliable contact when in contact with the stationary contact and avoid poor contact.

[0033] The bracket 1 includes a first frame 12 and a second frame 13, which are connected by a connecting column 14. The movable contact piece 2 is located between the first frame 12 and the second frame 13. Specifically, the movable contact piece 2 has a slot 25, and a locking block 23 is located below the first frame 12 and facing the contact cavity to vertically limit the movable contact piece 2. The slot 25 engages with the second frame 13 to limit the movable contact piece 2. This structure makes the movable contact piece easy to install, reliably limits its position, and prevents displacement. In actual use, the movable contact piece can only move slightly within the mounting slot of the bracket, facilitating reliable contact with the moving contact. The slot design makes reasonable use of the movable contact piece's structure, serving as a limiting element, while also making the arc-shaped portion closer to the central axis of the plum blossom contact than the locking block.

[0034] The movable contact 2 is provided with a receiving groove 26, and an elastic element 4 is provided inside the receiving groove 26. The elastic element 4 surrounds the outer side of the movable contact 2 and has a tendency to drive the movable contact 2 to move inward and reduce the contact cavity. Specifically, the receiving groove 26 is arc-shaped, with two receiving grooves 26 arranged as a group, and at least four receiving grooves 26 are arranged in two groups at the upper and lower ends of the movable contact 2 respectively. This structure facilitates the provision of restoring force for the movable contact, causing the movable contact to move towards the center, making the connection between the movable contact and the stationary contact convenient and reliable.

[0035] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modification that utilizes the inventive concept will be included within the scope of protection of this utility model patent.

Claims

1. A contact with a temperature measuring device, characterized in that: The utility model relates to a temperature measuring device for a movable contact piece of a contactor, which comprises: a bracket (1) provided with a mounting groove (11); a movable contact piece (2) arranged in the mounting groove (11) of the bracket and used for connecting with a static contact; the movable contact piece (2) has multiple pieces, and different movable contact pieces (2) are arranged in a ring shape and circumferentially around the bracket (1); different movable contact pieces (2) are matched to form a contact cavity (21); a temperature measuring device (3) inlaid in the movable contact piece (2) and used for temperature detection.

2. A contact according to claim 1, characterized in that The utility model further comprises an inlay groove (22) arranged in the middle of the movable contact piece (2), and the temperature measuring device (3) is inlaid in the inlay groove (22) of the movable contact piece (2).

3. The contact according to claim 1, characterized in that The temperature measuring device (3) is adhered in the movable contact piece (2) by adhesive.

4. The contact according to claim 2, characterized in that The movable contact piece (2) is formed into a movable contact piece group with two pieces as a group, the bracket (1) is provided with multiple movable contact piece groups, the temperature measuring device (3) has multiple pieces, and different temperature measuring devices (3) are arranged on different movable contact piece groups.

5. A contact according to claim 4, characterized in that The inlay groove (22) is arranged on the side surface of the movable contact piece (2) and penetrates the movable contact piece group in the thickness direction of the movable contact piece (2).

6. The contact according to claim 2, characterized in that The cross-sectional area A of the movable contact piece (2) for current flow at the inlay groove (22) is not less than the cross-sectional area B of the movable contact piece (2) for current flow at the narrowest position.

7. The temperature measuring device equipped with a wrench-shaped contact according to claim 1, characterized in that The movable contact piece (2) is provided with a clamping block (23) and an arc-shaped part (24), the clamping block (23) and the arc-shaped part (24) are arranged on the two sides of the movable contact piece (2) respectively, the arc-shaped parts (24) of different movable contact pieces (2) all face the static contact, and the area of the contact cavity (21) formed at the arc-shaped parts (24) of different movable contact pieces (2) is greater than the area of the contact cavity (21) formed at different clamping blocks.

8. A contact according to claim 7, characterized in that The bracket (1) comprises a first bracket body (12) and a second bracket body (13), the first bracket body (12) and the second bracket body (13) are connected through a connecting column (14), the movable contact piece (2) is arranged between the first bracket body (12) and the second bracket body (13), the movable contact piece (2) is provided with a clamping groove (25), the clamping block (23) is arranged below the first bracket body (12) and faces the contact cavity and is used for vertically limiting the movable contact piece (2), and the clamping groove (25) is clamped into the second bracket body (13) and is used for limiting the movable contact piece (2).

9. The temperature measuring device equipped with a contact according to claim 1, characterized in that The movable contact piece (2) is provided with a containing groove (26), the containing groove (26) is provided with an elastic element (4), the elastic element (4) is arranged on the outer side of the movable contact piece (2) and has a movement trend of driving the movable contact piece (2) to move inward and reduce the contact cavity.

10. A contact according to claim 9, characterized in that The containing groove (26) is arranged in an arc shape, two containing grooves (26) are arranged as a group, and at least four containing grooves (26) are arranged as two groups at the upper and lower ends of the movable contact piece (2).

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