Anti-loosening buckle of wiring terminal

Abstract

The utility model relates to a wiring terminal anti-loosening buckle, comprising a CT secondary circuit wiring terminal and a buckle inserted and installed on the CT secondary circuit wiring terminal, the CT secondary circuit wiring terminal is composed of a pedestal, and a test wire jack and a terminal strip connecting sheet which are respectively arranged on the installation surface of the pedestal; wherein the number of the test wire jacks is two, the two test wire jacks are respectively arranged at the two sides of the mounting surface of the base, a terminal strip connecting sheet is arranged between the two test wire jacks, the end parts of the two sides of the mounting surface of the base are respectively provided with mounting holes, wire fastening screws are arranged in the mounting holes, one surface, close to a CT secondary circuit wiring terminal, of the buckle is an assembling surface, and the other surface of the buckle is an assembling surface. The assembling surface is provided with a recessed connecting sheet plug, and two ends of the assembling surface are respectively provided with a wiring terminal insertion column with a slot. The utility model has the advantages of simple and reasonable structure, practicability, safety and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch three-phase synchronization monitoring devices, relates to a wire terminal anti-loosening buckle, and specifically relates to a temperature-sensitive anti-loosening buckle for wiring terminals. Background Technique

[0002] Before the CT secondary circuit of electrical equipment is connected to relay protection, automatic devices, measurement and control devices, etc., it needs to be first connected to the current wiring terminal in the switch cabinet and then introduced into the sampling board of the device through internal wiring. If the device needs to measure the current of primary equipment more, then the CT secondary circuit wiring terminals in the switch cabinet will also be correspondingly configured more. These wiring terminals are fixed on the guide rail, such as the safety control and machine cutting device, the fault recorder device, the transmitter screen, etc. The more CT secondary circuits there are, the more likely CT secondary circuit faults will occur at the wiring terminal row. The external circuit of the CT secondary circuit generally uses 4m² or 6m² hard wire to connect to the wiring terminal. Although the terminals have been tightened during commissioning, since the fixing screws of the wiring terminals generally do not have a locking function, the tightening screws of the wiring terminal row during operation are affected by vibration, thread wear, thermal expansion and contraction of materials, and improper use of the tightening torque, etc., which may cause the tightening screws to loosen, resulting in an open circuit problem in the CT secondary circuit. In the lightest case, it will cause equipment tripping and unit shutdown accidents, and in the most serious case, it will cause equipment burnout and fire accidents. In addition, poor maintenance quality, aging of the terminal row, and harsh operating environment, etc., may all cause an open circuit fault in the CT secondary circuit during operation.

[0003] To detect such potential safety hazards in a timely manner, the common practice is to regularly carry out infrared imaging inspections. However, due to the large number of devices and the relatively long maintenance cycle, the open circuit problem of the CT secondary circuit cannot be detected during daily inspections, resulting in the gradual development of such potential safety hazards into open circuit faults of the CT secondary circuit. In addition, some power enterprises also install infrared monitoring devices inside the protection switch cabinet to check the heating condition of the wiring terminals in real time, but due to the existence of inspection dead angles and high cost, it has not been widely used.

[0004] Therefore, a wiring terminal anti-loosening buckle is designed to overcome the above problems. Content of the Utility Model

[0005] The purpose of the present utility model is to overcome the deficiencies existing in the prior art, and to provide a wiring terminal anti-loosening buckle with simple and reasonable structure, practical and safe, which is used to prevent open circuit faults caused by loosening of the fastening screws of the CT secondary circuit wiring terminals. The buckle is installed on the wiring terminal, tightly wrapping the whole wiring terminal, and the temperature-sensitive material is closely attached to the conductive part, having the functions of temperature sensing and preventing the sliding piece of the wiring terminal from loosening. When the fastening screws of the CT secondary circuit wiring terminal row are loose, the contact resistance appears in the circuit at the terminal crimping place, and the wiring terminal gets hot significantly. Through the change of color, it reminds the operating personnel to find problems in time and improves the reliability of the operation of the CT secondary circuit.

[0006] The present utility model is realized by the following technical solutions: A wiring terminal anti-loosening buckle includes a CT secondary circuit wiring terminal and a buckle inserted and installed on the CT secondary circuit wiring terminal. The CT secondary circuit wiring terminal consists of a base and a test wire jack and a terminal row connecting piece respectively arranged on the mounting surface of the base. Among them, there are two test wire jacks respectively arranged on both sides of the mounting surface of the base, and a terminal row connecting piece is arranged between the two test wire jacks. Installation holes are respectively arranged at both ends of the mounting surface of the base, and wire fastening screws are installed in the installation holes. The side of the buckle close to the CT secondary circuit wiring terminal is an assembly surface. A sunken connecting piece plug is arranged on this assembly surface, and a wiring terminal plug post with a slot is respectively arranged at both ends of the assembly surface. The two wiring terminal plug posts match the two test wire jacks on the mounting surface of the base, and the connecting piece plug matches the terminal row connecting piece. When each test wire jack inserts the wiring terminal plug post, the connecting piece plug is embedded and installed on the terminal row connecting piece, realizing the installation and fixation between the buckle and the CT secondary circuit wiring terminal.

[0007] As a preference: A protruding connecting piece open circuit prevention plug is arranged on the buckle assembly surface between the connecting piece plug and the wiring terminal plug post. The connecting piece open circuit prevention plug is directly opposite to the gap between the test wire jack and the terminal row connecting piece on the mounting surface of the base and matches the gap. When the buckle is installed and fixed with the CT secondary circuit wiring terminal, the connecting piece open circuit prevention plug is inserted into the gap between the test wire jack and the terminal row connecting piece, which is used to prevent open circuit faults caused by loosening of the wire fastening screws of the CT secondary circuit wiring terminal.

[0008] As a preference: A locking mechanism is arranged at the bottom of the side of the connecting piece open circuit prevention plug close to the connecting piece plug, which is used to lock through the locking mechanism after the buckle is installed in place with the CT secondary circuit wiring terminal.

[0009] As a preference: The buckle is made of temperature-sensitive material. The buckle is installed on the CT secondary circuit wiring terminal, tightly wrapping the whole wiring terminal, and the temperature-sensitive material is closely attached to the conductive part of the terminal row.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] The anti-loosening buckle of the terminal of the present utility model is used to prevent the open-circuit fault caused by the loosening of the fastening screw of the CT secondary circuit terminal. The buckle is installed on the terminal, tightly wrapping the entire terminal. The temperature-sensitive material of the buckle is closely attached to the conductive part, with the functions of temperature sensing and preventing the sliding piece of the terminal from loosening. When the fastening screw of the CT secondary circuit terminal block loosens, a contact resistance appears in the circuit at the terminal crimping place, and the terminal gets significantly heated. Through the color change, it reminds the operating personnel to discover the problem in time, improving the reliability of the operation of the CT secondary circuit. Description of the Drawings

[0012] Figure 1 is the overall structural schematic diagram of the present utility model;

[0013] Figure 2 is the structural schematic diagram after installation of the present utility model;

[0014] Figure 3 is the side view of the CT secondary circuit terminal in the present utility model. Detailed Embodiment Modes

[0015] To enable those of ordinary skill in the art to more clearly understand the purpose, technical solution and advantages of the present utility model, the following further elaborates the present utility model in conjunction with the drawings and embodiments.

[0016] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", "vertical", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than indicating or implying that the device or component referred to must have a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model.

[0017] The following will introduce the present utility model in detail with reference to the drawings: As Figure 1-2As shown in the figure, a wire terminal anti-loosening buckle includes a CT secondary circuit wire terminal 1 and a buckle 2 inserted and installed on the CT secondary circuit wire terminal 1. The CT secondary circuit wire terminal 1 is composed of a base 3, a test wire jack 4 and a terminal row connecting piece 5 respectively arranged on the installation surface of the base 3. Among them, there are two test wire jacks 4 respectively arranged on both sides of the installation surface of the base 3. A terminal row connecting piece 5 is arranged between the two test wire jacks 4. Installation holes 6 are respectively arranged at both end parts of the installation surface of the base 3. A wire fastening screw 11 is installed in the installation hole 6. One side of the buckle 3 close to the CT secondary circuit wire terminal is an assembly surface 7. A sunken connecting piece plug 8 is arranged on the assembly surface 7. And a wire terminal insertion post 10 with a slot 9 is respectively arranged at both ends of the assembly surface 7. The two wire terminal insertion posts 10 are matched with the two test wire jacks 4 on the installation surface of the base 3. The slot 9 is used for convenient installation. The connecting piece plug 8 is matched with the terminal row connecting piece 5. When each test wire jack 4 inserts the wire terminal insertion post 10, the connecting piece plug 8 is embedded and installed on the terminal row connecting piece 5 to realize the installation and fixation between the buckle 2 and the CT secondary circuit wire terminal 1.

[0018] In the utility model, the connecting piece plug is installed on the terminal connecting piece, and its size fits perfectly with the terminal connecting piece. On the one hand, it can monitor the temperature of the connecting piece, and on the other hand, it exerts an external pressure on the terminal connecting piece to make it in close contact with the conductive part of the wire terminal.

[0019] The buckle of the utility model is integrally made of a reversible temperature-sensitive material. When the temperature exceeds the set temperature, obvious color change occurs at the high-temperature part. When it is less than the set temperature, it returns to the initial state. In addition, this material also has characteristics such as high insulation, high temperature resistance, and corrosion prevention. The buckle is installed on the CT secondary circuit wire terminal and is close to the conductive part, and is used to monitor whether there is a heating phenomenon at the CT secondary circuit wire terminal. When the fastening screw of the CT secondary circuit terminal row is loose or the contact at the CT secondary circuit wire terminal is not good, a contact resistance appears in the circuit at the terminal crimping part, and the wire terminal heats up significantly. Through the color change, it reminds the operating personnel to discover the problem in time. Its wire terminal insertion post is inserted into the test wire jack of the wire terminal, which can not only play a fixing role, but also prevent maintenance personnel from accidentally short-circuiting or accidentally cross-connecting the operating CT secondary circuit wire terminal.

[0020] Such as Figure 3As shown, between the connecting piece plug 8 and the terminal post 10 of the wiring terminal, there is a protruding connecting piece open - circuit prevention plug 12 on the assembly surface 7 of the buckle 2. The connecting piece open - circuit prevention plug 12 is opposite to the gap 13 between the test line jack 4 on the mounting surface of the base 3 and the terminal block connecting piece 5, and is matched with the gap 13. When the buckle 2 is installed and fixed to the CT secondary circuit wiring terminal 1, the connecting piece open - circuit prevention plug 12 is inserted into the gap 13 between the test line jack 4 and the terminal block connecting piece 5 to prevent the open - circuit fault caused by the loosening of the wire fastening screw 11 of the CT secondary circuit wiring terminal 1.

[0021] The connecting piece open - circuit prevention plug in the present utility model is used to prevent the terminal block connecting piece from being loosened and scratched during operation, resulting in an open - circuit fault in the CT secondary circuit and causing misoperation of the protection.

[0022] At the bottom of the side of the connecting piece open - circuit prevention plug 12, near the side of the connecting piece plug, there is a locking mechanism 14, which is used to lock after the buckle 2 and the CT secondary circuit wiring terminal 1 are installed in place. The locking mechanism of the present utility model can be a common door - lock structure. By inserting a key into the hole opened on the buckle and rotating the key, the locking tongue can be opened or closed, so as to realize the locking and opening of the whole buckle.

[0023] The buckle 2 is made of a temperature - sensitive material. The buckle 2 is installed on the CT secondary circuit wiring terminal 1, tightly wrapping the whole wiring terminal, and the temperature - sensitive material is closely attached to the conductive part 15 of the terminal block.

[0024] The specific embodiments described herein are only illustrative of the principles and effects of the present utility model, rather than limiting the present utility model. Any person familiar with this technology can modify or change the above - mentioned embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A terminal anti-loosening clip, comprising a CT secondary circuit terminal (1) and a clip (2) inserted and installed on the CT secondary circuit terminal (1), characterized in that: The CT secondary circuit terminal (1) is composed of a base (3) and a test line jack (4) and a terminal block connecting piece (5) respectively arranged on the mounting surface of the base (3), wherein the test line jack (4) is two and is respectively arranged on both sides of the mounting surface of the base (3), and a terminal block connecting piece (5) is arranged between the two test line jacks (4). The two side ends of the mounting surface of the base (3) are respectively provided with mounting holes (6), and wire fastening screws (11) are installed in the mounting holes (6). The side of the buckle (2) close to the CT secondary circuit terminal is an assembly surface (7), and the assembly surface A recessed connecting piece plug (8) is provided on the assembly surface (7), and a terminal plug post (10) with a slot (9) is provided at both ends of the assembly surface (7), the two terminal plug posts (10) match the two test line sockets (4) on the mounting surface of the base (3), and the connecting piece plug (8) matches the terminal block connecting piece (5). When the connecting piece plug post (10) is inserted into each test line socket (4), the connecting piece plug (8) is embedded and installed on the terminal block connecting piece (5), so as to realize the installation and fixation between the buckle (2) and the CT secondary circuit terminal (1).

2. The anti-loosening buckle of the terminal block according to claim 1, characterized in that: A protruding connecting piece anti-open circuit plug (12) is provided on the mounting surface (7) of the buckle (2) between the connecting piece plug (8) and the terminal plug post (10); the connecting piece anti-open circuit plug (12) is directly opposite to the gap (13) between the test line plug hole (4) and the terminal block connecting piece (5) on the mounting surface of the base (3) and matches the gap (13); when the buckle (2) and the CT secondary circuit terminal (1) are fixedly mounted, the connecting piece anti-open circuit plug (12) is inserted into the gap (13) between the test line plug hole (4) and the terminal block connecting piece (5) to prevent an open circuit fault caused by loosening of the wire fastening screw (11) of the CT secondary circuit terminal (1).

3. The anti-loosening buckle of the terminal block according to claim 2, characterized in that: A locking mechanism (14) is provided at the bottom of the side of the connecting piece anti-open circuit plug (12) near one side of the connecting piece plug, and is used to lock the buckle (2) and the CT secondary circuit terminal (1) through the locking mechanism (14) after they are installed in place.

4. The anti-loosening buckle of the terminal according to claim 1, characterized in that: The buckle (2) is made of a temperature-sensitive material. The buckle (2) is mounted on the CT secondary circuit terminal (1) to tightly wrap the entire terminal. The temperature-sensitive material is in close contact with the conductive part (15) of the terminal block.

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