Crimping-free self-locking terminal integrated with temperature measurement function

Abstract

The invention discloses a crimping-free self-locking terminal integrated with a temperature measurement function. The crimping-free self-locking terminal comprises a terminal head and a conductive plug connector connected with the terminal head, a wire pressing part matched with a wire is arranged in the conductive plug connector; an elastic element is arranged between the conductive plug connector and the conductive plug connector; the inner wall of the conductive plug connector is provided with a temperature measurement sensor probe which is insulated and isolated from the conductive plug connector. And the wire pressing part transmits the heat of the wire to the probe of the temperature measuring sensor. The temperature measurement sensor probe is integrated on the inner wall of the conductive plug connector of the terminal self-locking structure, and accurate measurement of the temperature of the wire in the wire passing cavity is realized while crimping-free self-locking is realized by utilizing the heat conduction and electric conduction characteristics of the wire pressing part.

Description

Technical Field

[0001] The invention relates to the technical field of power transmission and distribution equipment, and in particular to a crimp-free self-locking terminal with an integrated temperature measurement function. Background Art

[0002] In recent years, with the rapid growth of my country's electricity demand, the load level of power lines has risen sharply, and accordingly, the failure rate has also increased significantly. In particular, the frequent connection failures at the power line terminals have become the focus of industry attention. In this context, solving the problem of reliable connection between hard round conductors and terminals in 10kV and below voltage level lines and achieving continuous and stable electrical connections are particularly important for improving the stability and safety of the entire power transmission and distribution system.

[0003] Traditional temperature measurement technology has obvious limitations when facing closed environments and high voltage and high current application scenarios. For example, direct contact temperature measurement methods are often not suitable for such environments, while infrared temperature measurement technology is easily affected by environmental factors and has shortcomings such as low measurement accuracy and low efficiency. In the actual operation of the power system, electrical equipment is often in a high voltage and high current working state. Potential defects inside the equipment (such as poor contact, aging, etc.) will cause abnormal temperature rise of components, which will in turn trigger a positive feedback loop between temperature and contact resistance. In severe cases, it may cause major safety accidents such as equipment burning and explosion.

[0004] It is particularly noteworthy that during long-term operation, key joints such as contacts and busbar connections of electrical equipment will gradually heat up due to factors such as material aging and increased contact resistance, forming a vicious cycle and exacerbating the safety risks of the equipment. At the same time, due to the exposed high voltage and narrow space inside the switch cabinet, manual regular inspections and temperature measurements become extremely difficult or even impossible, which further highlights the limitations of existing monitoring technologies. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a crimp-free self-locking terminal with an integrated temperature measurement function to adapt to high voltage and high current environments and to accurately and efficiently monitor the temperature of the connection points of electrical equipment.

[0006] In order to solve the above technical problems, the present invention provides a crimp-free self-locking terminal with integrated temperature measurement function, comprising:

[0007] A terminal head and a conductive connector connected to the terminal head;

[0008] The conductive connector is provided with a wire pressing portion adapted to the wire;

[0009] An elastic element is arranged between the conductive connector and the conductive connector;

[0010] A temperature sensor probe insulated from the conductive connector is disposed on the inner wall of the conductive connector;

[0011] The wire pressing part transfers the heat of the wire to the temperature sensor probe.

[0012] Preferably, a first cavity with a tapered side wall is provided inside the conductive connector, the first cavity is connected to a wire insertion port, and the wire insertion port is a reduced diameter end of the first cavity.

[0013] Preferably, the wire pressing portion is disposed in the first cavity and is matched with the tapered side wall.

[0014] Preferably, a second cavity is coaxially connected to the first cavity, the elastic element is arranged in the second cavity, one end of the elastic element abuts against the terminal head, and the other end abuts against the wire pressing portion.

[0015] Preferably, the wire pressing portion is formed by a plurality of trapezoidal pressing sheets enclosed to form a truncated cone, a wire passing cavity for the wire is formed between the center of the upper bottom surface and the lower bottom surface of the truncated cone, and a plurality of trapezoidal pressing sheets at one end of the upper bottom surface shrink or rebound radially toward the central axis of the wire passing cavity.

[0016] Preferably, a first insulating connecting sleeve is provided at the connection between the terminal head and the conductive connector and outside the conductive connector.

[0017] Preferably, at one end close to the wire insertion port, a second insulating connecting sleeve is axially installed to prevent the cable from loosening.

[0018] Preferably, a folded plate extending radially toward the center is circumferentially arranged at the open end of the second insulating connecting sleeve.

[0019] Preferably, an electric control board and a coil are arranged in the area between the opening of the second insulating connecting sleeve and the wire insertion port, close to the wire insertion port.

[0020] Preferably, a single-chip microcomputer, a power module and a wireless module are arranged on the electric control board, the output end of the temperature sensor probe is connected to the first input end of the single-chip microcomputer, the output end of the coil is connected to the input end of the power module, and the output end of the power module is connected to the second input end of the single-chip microcomputer.

[0021] The implementation of the present invention has the following beneficial effects: the present invention integrates a temperature sensor probe on the inner wall of the conductive connector of the terminal self-locking structure, and utilizes the thermal and electrical conductivity of the wire pressing part to achieve accurate measurement of the temperature of the wire in the wire cavity. The power supply of the temperature measurement circuit adopts the principle of electromagnetic induction. The magnetic field induced by the current of the exposed wire in the second insulating connecting sleeve induces current in the coil to charge the power module, thereby providing a stable energy source for the temperature measurement circuit. In addition, the design of the shielding structure enhances the anti-interference ability and ensures the accuracy of the measurement data. The temperature data collected by the electric control board is wirelessly sent to the terminal through the wireless module, which realizes the real-time monitoring of the terminal temperature and improves the safety and reliability of the power line terminal connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The present invention is a schematic diagram of the assembly structure of a crimp-free self-locking terminal with an integrated temperature measurement function according to an embodiment of the present invention.

[0024] Figure 2 The present invention is a schematic cross-sectional structure diagram of a crimp-free self-locking terminal with an integrated temperature measurement function according to an embodiment of the present invention.

[0025] Figure 3 It is a schematic diagram of the combination of the temperature measurement circuit and the terminal structure in an embodiment of the present invention.

[0026] Figure 4 Schematic diagram of the module structure of the temperature measurement circuit in the embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following descriptions of the embodiments are with reference to the accompanying drawings to illustrate specific embodiments in which the present invention can be implemented. In the description of the present invention, it should be understood that the terms "longitudinal", "length", "circumferential", "front", "rear", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0028] Please also refer to Figure 1-3 As shown, an embodiment of the present invention provides a crimp-free self-locking terminal with an integrated temperature measurement function, comprising:

[0029] A terminal head 1 and a conductive connector 2 connected to the terminal head 1;

[0030] The conductive connector 2 is provided with a wire pressing portion 3 adapted to the wire;

[0031] An elastic element is provided between the conductive connector 2;

[0032] A temperature sensor probe 4 insulated from the conductive connector 2 is disposed on the inner wall of the conductive connector 2;

[0033] The wire pressing part 3 transfers the heat of the wire to the temperature sensor probe 4 .

[0034] Specifically, in the embodiment of the present invention, a first cavity 21 with a tapered side wall is provided inside the conductive connector 2, and the first cavity 21 is connected to the wire insertion port 23, which is the reduced diameter end of the first cavity 21. A wedge-shaped wire pressing portion 3 that is adapted to the tapered side wall and can conduct electricity is provided inside the first cavity 21. An elastic element is provided in the second cavity 22 that is coaxially connected to the first cavity 21. As an example, the elastic element is specifically a compression spring 24. One end of the compression spring 24 abuts against the terminal head 1, and the other end abuts against the wedge-shaped wire pressing portion 3. The wedge-shaped wire pressing portion 3 is formed into a truncated cone by a plurality of trapezoidal pressing sheets, and a wire passing cavity 31 for the wire is formed between the upper bottom surface and the center of the lower bottom surface of the truncated cone, and a plurality of trapezoidal pressing sheets at one end of the upper bottom surface can radially shrink or rebound toward the central axis of the wire passing cavity 31.

[0035] When the exposed end of the wire 10 of the cable 100 is inserted into the wire insertion port 23, the wedge-shaped wire pressing part 3 is pushed to move in the direction of the compression spring 24. After being inserted into the top, the exposed wire is moved in the opposite direction to drive the reduced diameter end or the upper bottom surface of the wedge-shaped wire pressing part 3 to extend out of the wire insertion port 23. The wire insertion port 23 limits the squeezing of the moving wedge-shaped wire pressing part 3, and the trapezoidal pressing piece of the wedge-shaped wire pressing part 3 squeezes the exposed wire, so that the cable can only enter the conductive connector 2 in one direction, and the cable 100 will be locked when it is withdrawn.

[0036] The wedge-shaped wire-pressing portion 3 is made of a heat-conducting material. A temperature sensor probe 4 insulated and isolated from the conductive connector 2 is provided on the inner wall of the wire insertion port 23, and is in contact with the wedge-shaped wire-pressing portion 3. The heat of the exposed wire in the wire cavity 31 is transferred to the temperature sensor probe 4 through the wedge-shaped wire-pressing portion 3. Preferably, a notch is provided at the wire insertion port 23, and the temperature sensor probe 4 is completely embedded to form a smooth conical side wall of the first cavity 21. A groove is provided on the conical inner wall of the first cavity 21, and the temperature sensor probe 4 can be embedded in the groove and is insulated and isolated from the conductive connector 2. A lead-out wire is punched through a hole in the axial direction of the wire cavity 31 to connect to the temperature measuring circuit. Figure 3As shown, the conductive connector 2, the insulating sleeve, and the temperature sensor probe 4 in the insulating sleeve can be bonded to each other. Or a baffle (not shown) is set at the end of the plug port 23 to abut against the temperature sensor probe 4, so that it is embedded in the groove inside the first cavity 21. It can be understood that the temperature sensor probe 4 is specifically a negative temperature coefficient NTC (Negative Temperature Coefficient) sensor. The NTC sensor can measure the ambient temperature because its resistance changes with the change of temperature. The resistance of the NTC gradually decreases as the temperature rises. The material of the temperature sensor probe 4 is platinum, soft magnetic alloy material, thermistor, etc.

[0037] A first insulating connection sleeve 51 is provided at the connection between the terminal head 1 and the conductive connector 2 and on the outside of the conductive connector 2. At one end close to the wire insertion port 23, a second insulating connection sleeve 52 is installed along the axial direction to prevent the cable 100 from loosening. The open end of the second insulating connection sleeve 52 is designed with circumferential folding plates 521, which extend radially toward the center, so that the cable 100 can smoothly enter the terminal's wire passage cavity 31 in one direction, and provide necessary resistance when the cable 100 exits the wire passage cavity 31. In the area between the opening of the second insulating connection sleeve 52 and the wire insertion port 23, in the cavity except for the wire passing position, an electric control board 40 and a coil 41 are arranged near the wire insertion port 23. The electric control board 40 and the coil 41 can be separated and fixed from the wire passing position by a retaining wall (not shown).

[0038] like Figure 4 As shown, a single-chip microcomputer 42, a power module and a wireless module 43 are arranged on the electric control board 40. The principle of electromagnetic induction is used to inductively draw power through a primary current flowing through the terminal contacts. The change of the current on and off generates a magnetic field, and the coil draws power through the electromagnetic field generated by the current of the exposed wire in the second insulating connecting sleeve 52. The induced current in the coil charges the power module to provide normal operation of the internal single-chip microcomputer and the wireless module. The temperature sensor probe 4 is connected to the single-chip microcomputer through a lead wire, and the detected temperature is converted into an electrical signal. The single-chip microcomputer sends the temperature electrical signal to the wireless module, and the collected temperature data is transmitted to the wireless temperature transmitter or the main control background in real time through wireless.

[0039] It can be seen from the above description that compared with the prior art, the beneficial effect brought by the embodiments of the present invention is that: the present invention integrates a temperature sensor probe on the inner wall of the conductive connector of the terminal self-locking structure, and utilizes the thermal and electrical conductivity of the wire pressing part to achieve accurate measurement of the temperature of the wire in the wire cavity. The power supply of the temperature measurement circuit adopts the principle of electromagnetic induction. The magnetic field induced by the current of the exposed wire in the second insulating connecting sleeve induces current in the coil to charge the power module, thereby providing stable energy for the temperature measurement circuit. In addition, the design of the shielding structure enhances the anti-interference ability and ensures the accuracy of the measurement data. The temperature data collected by the electric control board is wirelessly sent to the terminal through the wireless module, which realizes the real-time monitoring of the terminal temperature and improves the safety and reliability of the power line terminal connection.

[0040] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A crimp-free self-locking terminal with integrated temperature measurement function, characterized in that: include: A terminal head and a conductive connector connected to the terminal head; The conductive connector is provided with a wire pressing portion adapted to the wire; An elastic element is arranged between the conductive connector and the conductive connector; A temperature sensor probe insulated from the conductive connector is disposed on the inner wall of the conductive connector; The wire pressing part transfers the heat of the wire to the temperature sensor probe.

2. The crimp-free self-locking terminal according to claim 1, characterized in that: A first cavity with a tapered side wall is arranged inside the conductive connector. The first cavity is connected to a wire insertion port, and the wire insertion port is a reduced diameter end of the first cavity.

3. The crimp-free self-locking terminal according to claim 2, characterized in that: The wire pressing portion is arranged in the first cavity and is matched with the tapered side wall.

4. The crimp-free self-locking terminal according to claim 2, characterized in that: A second cavity is coaxially connected to the first cavity, the elastic element is arranged in the second cavity, one end of the elastic element abuts against the terminal head, and the other end abuts against the wire pressing portion.

5. The crimp-free self-locking terminal according to claim 1, characterized in that: The wire pressing part is formed by a plurality of trapezoidal pressing sheets enclosed to form a truncated cone, a wire passing cavity is formed between the upper bottom surface and the center of the lower bottom surface of the truncated cone, and a plurality of trapezoidal pressing sheets at one end of the upper bottom surface shrink or rebound radially toward the central axis of the wire passing cavity.

6. The crimp-free self-locking terminal according to claim 1, characterized in that: A first insulating connection sleeve is provided at the connection between the terminal head and the conductive plug connector and outside the conductive plug connector.

7. The crimp-free self-locking terminal according to claim 6, characterized in that: At one end close to the wire insertion port, a second insulating connecting sleeve is installed along the axial direction to prevent the cable from loosening.

8. The crimp-free self-locking terminal according to claim 7, characterized in that: The opening end of the second insulating connecting sleeve is circumferentially provided with a folded plate extending radially toward the center.

9. The crimp-free self-locking terminal according to claim 8, characterized in that: In the area between the opening of the second insulating connecting sleeve and the wire insertion port, an electric control board and a coil are arranged near the wire insertion port.

10. The crimp-free self-locking terminal according to claim 9, characterized in that: A single-chip microcomputer, a power module and a wireless module are arranged on the electric control board; the output end of the temperature sensor probe is connected to the first input end of the single-chip microcomputer; the output end of the coil is connected to the input end of the power module; and the output end of the power module is connected to the second input end of the single-chip microcomputer.

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