CN214589296U - Connection lug and cable with connection lug - Google Patents
Connection lug and cable with connection lug Download PDFInfo
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- CN214589296U CN214589296U CN202023345409.7U CN202023345409U CN214589296U CN 214589296 U CN214589296 U CN 214589296U CN 202023345409 U CN202023345409 U CN 202023345409U CN 214589296 U CN214589296 U CN 214589296U
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- cable core
- mutual inductance
- signal transmitter
- lug
- power supply
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Abstract
The application provides a lug and possess cable of lug, lug include cable core connection end portion, still include: the package is at the outside fixed casing of cable core link, the inside signal transmitter of fixed casing, temperature sensor and mutual inductance power supply unit of package, temperature sensor's induction part and cable core link temperature sensing contact, and be connected with signal transmitter electricity, the outside of cable core link is located to the mutual inductance device cover of supplying power, and be connected with signal transmitter electricity, mutual inductance power supply unit is used for producing mutual inductance current under the excitation that cable core link inner current produced the magnetic field, mutual inductance current is used for sending the power supply for signal transmitter, temperature sensor is used for detecting the temperature of cable core link, signal transmitter is used for outside transmission temperature data. This scheme can realize the temperature of accurate measurement cable core connection end portion, and guarantees that the lug is in same electric potential, avoids appearing electrical breakdown.
Description
Technical Field
The application relates to the technical field of power distribution, and more particularly relates to a lug and a cable with the lug.
Background
In the technical field of power distribution, electric energy is output to a switch cabinet after being subjected to voltage reduction through a high-voltage transformer substation, and is further subjected to voltage reduction and then is transmitted to a user.
The switch cabinet belongs to secondary distribution electrical equipment, and an outlet terminal is used as an output interface of the switch cabinet and is generally connected with a cable by means of a cable shoe. The part of the outgoing line terminal connected with the cable shoe is easy to generate high temperature due to poor contact, the connection part is overheated for a long time to cause insulation breakdown, and the tab causes large-area power failure accidents.
Therefore, monitoring the temperature of the outlet terminal and the cable connection part of the switch cabinet is a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The application provides a lug and possess the cable of lug, aims at providing one kind and can accurately measure the temperature scheme of cable core connection tip.
In a first aspect, the present application provides a lug comprising: cable core connection end portion, lug still includes: the device comprises a fixed shell, a signal transmitter, a temperature sensor and a mutual inductance power supply device, wherein the fixed shell is packaged outside the connecting end part of a cable core;
the sensing part of the temperature sensor is in temperature sensing contact with the connecting end part of the cable core and is electrically connected with the signal transmitter;
the mutual inductance power supply device is sleeved outside the connecting end part of the cable core and is electrically connected with the signal transmitter.
Optionally, the mutual inductance power supply device comprises a magnet in a ring shape and a mutual inductance coil;
the magnet is encapsulated in the fixed shell, the magnet is sleeved outside the connecting end part of the cable core, and the mutual inductance coil is wound on the magnet;
the mutual inductor has two power supply line terminals and is connected to a signal transmitter, respectively.
Optionally, the temperature sensor, the signal transmitter, and the mutual inductance power supply device are integrally provided with the fixed housing.
Optionally, the signal transmitter comprises a temperature sensing signal processing unit and a wireless unit; the temperature sensing signal processing unit is respectively connected with the temperature sensor and the wireless unit.
In a second aspect, the present application provides a cable comprising: the cable comprises a cable core and an insulator coated outside the cable core; the cable further includes: a wire lug;
wherein, lug includes: the cable core connecting end part is connected with the cable core, and the fixed shell is packaged outside the cable core connecting end part;
the lug also includes: the signal transmitter, the temperature sensor and the mutual inductance power supply device are encapsulated in the fixed shell;
the sensing part of the temperature sensor is in temperature sensing contact with the connecting end part of the cable core and is electrically connected with the signal transmitter;
the mutual inductance power supply device is sleeved outside the cable core and is electrically connected with the signal transmitter.
The embodiment of the application provides a lug and possess cable of lug, and the lug includes: the temperature sensor detects in real time to obtain a temperature signal of a wiring lug and transmits the temperature signal to the signal transmitter, and the signal transmitter transmits the temperature data of the wiring lug to the outside. The mutual inductance power supply device is sleeved outside the connecting end part of the cable core and is electrically connected with the signal transmitter. When the connecting end part of the cable core of the lug is connected with the cable core and alternating current flows through the lug, mutual inductance current is generated in the mutual inductance power supply device and is used for supplying power to the signal transmitter. The self-power supply is realized through the mutual inductance power supply device without introducing a low-voltage power supply circuit. And a low-voltage signal output circuit is not required to be introduced, and the signal transmitter transmits temperature data outwards in a wireless mode, so that all parts in the wiring lug are positioned at the same potential, the voltage drop in the wiring lug is small, and no electric breakdown exists.
Drawings
FIG. 1 is a schematic diagram of an electrical energy delivery system according to an embodiment of the present disclosure;
fig. 2 is a schematic perspective view of a lug according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of a cable according to another embodiment of the present application.
Reference numerals:
1-a generator set; 2-an ultra high voltage transmission line; 3-primary electric energy distribution circuit; 4-secondary power distribution lines; 100-lug connection; 101-cable core connection end; 102-a temperature sensor; 103-a signal transmitter; 104-mutual inductance power supply device; 20-a cable; 201-a cable core; 202-insulator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings of the present application.
As shown in fig. 1, the electric power transmission line includes an extra-high voltage transmission line 2, a primary electric power distribution line 3, and a secondary electric power distribution line 4; the electric energy generated by the generator set 1 is boosted by a transformer in the high-voltage transmission line 2 and then transmitted; the high-voltage transmission line 2 supplies power to the primary electric energy distribution line 3, and a transformer in the primary electric energy distribution line 3 reduces the voltage and then performs multi-path transmission; the primary electric energy distribution circuit 3 supplies power to the secondary electric energy distribution circuit 4, the secondary electric energy distribution circuit 4 divides and multiplexes the electric energy, and the secondary electric energy distribution circuit is directly connected to users.
The switch cabinet is used as equipment in a secondary power distribution line 4, and the outlet terminal of the switch cabinet is connected with a cable so as to supply power to users. The connection part of the outgoing line terminal and the cable is easy to generate high temperature due to poor contact, and the insulation breakdown is caused by long-term overheating of the connection part, so that a large-area power failure accident is caused. Therefore, monitoring the temperature of the outlet terminal and the cable connection part of the switch cabinet is a technical problem to be solved urgently.
The application provides a lug and possess cable of lug, aims at providing the temperature scheme that can accurately obtain the lug. The invention conception of the application is as follows: the terminal lug serves as a connection end for the cable, on which the temperature sensor 102, the signal sensor 104 and the mutual inductance supply device 104 are arranged. The sensing part of the temperature sensor 102 is in temperature sensing contact with the connecting end part of the cable core, and the temperature of the connecting end part of the cable core is accurately measured. The cable core connecting end portion is located inside the mutual inductance power supply device 105, when the cable core connecting end portion is connected with the cable core, high-voltage current is introduced into the cable core connecting end portion, a magnetic field generated by the high-voltage current excites mutual inductance current in the mutual inductance power supply device 104, the mutual inductance current supplies power to the signal transmitter, a low-voltage power supply circuit does not need to be introduced, and self power supply inside the wiring lug is achieved. After the temperature sensor 102 detects and obtains the temperature signal, the temperature data is wirelessly output to the outside through the signal transmitter 104 without introducing a low-voltage signal output circuit. All devices in the wiring lug can be at the same potential, the voltage drop in the wiring lug is small, and the electrical breakdown cannot occur.
As shown in fig. 2, a lug 100 according to one embodiment of the present application is shown. The lug 100 includes a cable core connection end 101, a fixed housing (not shown), a temperature sensor 102, a signal transmitter 103, and a mutual inductance power supply 104.
The stationary housing is enclosed outside the cable core attachment end 101, the cable core attachment end 101 being for connection with a cable core. Preferably, the cable core connection end 101 is cylindrical. When connecting the cable core connection end portion 101 and the cable core, the cable core is inserted into the cable core connection end portion 101, and the cable core connection end portion is clamped with a tool.
The temperature sensor 102, the signal transmitter 103 and the mutual inductance power supply device 104 are packaged in the fixed shell, and the temperature sensing contact between the sensing part of the temperature sensor 102 and the cable core connecting end part 101 is ensured. The sensing part of the temperature sensor 102 is in contact with the cable core connection end part 101, so that the temperature signal of the cable core connection end part 101 can be accurately detected and obtained.
The mutual inductance power supply device 104 is sleeved outside the cable core connecting end part 101, when the wiring lug 100 is connected with a cable core, alternating current with amplitude exceeding 10kV is introduced into the wiring lug 100, and the mutual inductance power supply device 105 generates mutual inductance current like a mutual inductor under the excitation of a magnetic field generated by current in the cable core connecting end part 101. The mutual inductance power supply device 105 is electrically connected to the signal transmitter 104, and generates a mutual inductance current as a power source of the signal transmitter 104.
The temperature sensor 103 is electrically connected with the signal transmitter 104, the temperature sensor 103 transmits the temperature signal to the signal transmitter 104 after detecting and obtaining the temperature signal of the cable core connecting end 101, and the signal transmitter 104 is used for performing analog/digital conversion on the temperature signal to generate temperature data, packaging the temperature data into a temperature data packet through a corresponding transmission protocol, and transmitting the temperature data packet to the outside.
The working principle of the lug for temperature detection is described as follows: the sensing part of the temperature sensor 102 is in temperature sensing contact with the cable core connection end part 101, and directly detects and obtains a temperature signal of the cable core connection end part. When the connecting end part of the cable core of the lug is connected with the cable core, alternating current exceeding 10kV is introduced into the lug, so that the lug is also under high voltage. If a low-voltage circuit is introduced into the lug, for example: the low-voltage power supply circuit, the low-voltage signal transmission circuit and other circuits can cause the wiring lug to have the condition of electrical breakdown. In the embodiment, the mutual inductance power supply device 105 supplies power, alternating current is introduced into the cable core connecting end portion 101 to generate low-voltage mutual inductance current in the mutual inductance power supply device 105, the mutual inductance power supply device 105 is electrically connected with the signal transmitter 104, and the mutual inductance current generated by the mutual inductance power supply device 105 is used as a power supply of the signal transmitter 104, so that self-power supply in a wiring lug is realized. In addition, when detecting and acquiring the temperature signal of the cable core connection end, the temperature sensor 102 transmits the temperature signal of the cable core connection end to the signal transmitter 104, the signal transmitter 104 converts the temperature signal of the cable core connection end into temperature data, and transmits the temperature data to the outside in a wireless mode, and the lug is enabled to be at the same potential without introducing a low-voltage signal transmission circuit.
In the above embodiment, the temperature sensor, the signal transmitter and the mutual inductance power supply device are packaged in the fixed shell, the sensing part of the temperature sensor is in temperature sensing contact with the connecting end part of the cable core, the temperature of the connecting end part of the cable core is accurately detected, the mutual inductance power supply device generates mutual inductance current under the excitation of current in the connecting end part of the cable core, and the mutual inductance current is used for supplying power to the signal transmitter, so that the signal transmitter converts the temperature signal into temperature data and transmits the temperature data outwards in a wireless mode. Through the arrangement, the wiring lug is positioned under the equal potential, and is small in internal voltage drop and free from electrical breakdown like a bird standing on a high-voltage line.
The lug 100 of another class of embodiments of the present application is described below, the lug 100 including a cable core attachment end 101, a stationary housing, a temperature sensor 102, a signal transmitter 103, and a mutually inductive power supply 104.
The position relationship and the connection relationship of each component in the lug are already described in detail in the above embodiments, and are not described again here.
The temperature sensor 102 may be a resistance temperature sensor, a thermocouple temperature sensor, a bimetal sensor, or the like.
With continued reference to fig. 2, the mutual inductance power supply device 104 includes a ring-shaped magnet and a mutual inductance coil, the magnet is located in the fixed housing and sleeved outside the connection end portion of the cable core, the mutual inductance coil is wound around the magnet, and two terminals of the mutual inductance coil are respectively connected with the signal transmitter to realize power supply to the signal transmitter 103.
When the lug 100 is connected to the cable core, a current flows in the cable core connection end 101, the cable core connection end 101 serves as a primary coil, electromagnetic energy is transmitted through the magnet, a mutual inductance current is generated in the mutual inductance coil, and the mutual inductance current is supplied to the signal transmitter 103.
The signal transmitter 103 includes a temperature sensing signal processing unit and a wireless unit, the temperature sensing signal processing unit and the wireless unit are electrically connected, the temperature sensing signal processing unit is used for performing analog/digital conversion on the temperature signal detected by the temperature sensor 103 to generate temperature data, and the wireless unit is used for transmitting a temperature data packet to the outside.
Preferably, the temperature sensing signal processing unit and the wireless unit in the signal transmitter 103 are integrated on a circuit board to form a wireless transmitting circuit board, the temperature sensor 102 and the mutual inductance power supply device 104 are both connected to the wireless transmitting circuit board, and then the wireless transmitting circuit board connected with the temperature sensor 102 and the mutual inductance power supply device 104 and the fixed shell are integrated into an integrated structure by using a pouring process. It should be noted that: the sensing part of the temperature sensor is ensured to be in temperature sensing contact with the cable core connecting end part 101.
The working principle of the lug for temperature detection is described as follows: the sensing part of the temperature sensor 102 is in temperature sensing contact with the cable core connection end part 101, and directly detects and obtains the temperature of the cable core connection end part. When the lug is connected with the cable core, alternating current with the amplitude exceeding 10kV flows into the lug 100, the alternating current can generate an alternating magnetic field around the cable core connecting end part 101, electromagnetic energy is transferred through the magnet in the mutual inductance power supply device 105, mutual inductance current is generated in the mutual inductance coil of the mutual inductance power supply device, and the mutual inductance current generated by the mutual inductance power supply device 105 is used as a power supply of the signal transmitter 104. The temperature sensor 102 monitors the temperature of the cable core connection end 101 to obtain a temperature signal of the cable core connection end 101. The temperature signal at the cable core connection end is transmitted by the temperature sensor 102 to the signal transmitter 104. The temperature-sensitive signal processing unit in the signal transmitter 104 performs analog/digital conversion on the temperature signal to generate temperature data, and the wireless unit wirelessly transmits the temperature data to the outside.
Preferably, the temperature sensing signal processing unit in the signal transmitter 104 is configured to process the temperature signals detected at multiple times to obtain temperature data packets, and transmit the temperature data packets to the outside. By packaging and then sending a plurality of temperature signals outwards, the power consumption of the signal transmitter 104 is reduced, the power supplied by the mutual inductance power supply device 105 is reduced, the size of the mutual inductance power supply device 105 is further reduced, and the influence of the mutual inductance power supply device 105 on a lug structure is reduced.
In the above embodiment, the cable core connecting end portion is used as a primary coil, and the mutual inductance current is generated in the mutual inductance coil in the mutual inductance power supply device by alternating current excitation in the cable core end portion, and the mutual inductance current is used for providing the mutual inductance current for the signal transmitter, so that self power supply in the lug is realized, and the low-voltage power supply circuit is prevented from being introduced, and the lug is at the same potential. In addition, the signal transmitter packs the temperature signals acquired at a plurality of times into a temperature data packet, so that the working power of the signal transmitter can be reduced, the size of the mutual inductance power supply device can be further reduced, the influence of the mutual inductance power supply device on a wiring lug structure is reduced, and the reliability of the wiring lug is improved.
As shown in fig. 3, which is another specific embodiment of the present application, a cable 20 includes a cable core 201, an insulator 202, and a lug 100.
Wherein the end of the cable core 201 is mounted in the cable core connection end 101 of the lug 100, preferably the cable core connection end 101 is cylindrical, the cable core 201 is inserted into the cable core connection end 101, and the cable core 201 and the lug 100 are connected by clamping the cable core connection end 101 with a tool.
The structure of the wire connection lug has been described in detail in the above embodiments, and is not described in detail here.
When high-voltage current is introduced into the cable, the temperature sensor 102 positioned in the protective shell of the lug detects and obtains the temperature of the connecting end part of the cable core, the mutual inductance power supply device 104 supplies power to the signal transmitter 103 based on the principle of mutual inductors, and the signal transmitter 103 transmits temperature data outwards.
In the above embodiment, the sensing part of the temperature sensor is arranged at the connecting end part of the cable core, the signal transmitter outputs the temperature signal, the mutual inductance power supply device supplies power to the signal transmitter, and when the cable is connected with other electrical components through the wiring lug, the temperature at the connecting part of the wiring lug and other electrical components can be detected in real time.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application.
Claims (5)
1. A lug, comprising: cable core connection end portion, its characterized in that still includes: the fixed shell is packaged outside the connecting end part of the cable core, and the signal transmitter, the temperature sensor and the mutual inductance power supply device are packaged inside the fixed shell;
the sensing part of the temperature sensor is in temperature sensing contact with the connecting end part of the cable core and is electrically connected with the signal transmitter;
the mutual inductance power supply device is sleeved outside the connecting end part of the cable core and is electrically connected with the signal transmitter.
2. A lug according to claim 1, wherein: the mutual inductance power supply device comprises a magnet in a ring shape and a mutual inductance coil;
the magnet is packaged in the fixed shell, the magnet is sleeved outside the connecting end part of the cable core, and the mutual inductance coil is wound on the magnet;
the mutual inductor has two power supply line terminals and is connected to the signal transmitter, respectively.
3. A lug according to claim 1 or 2, wherein: the temperature sensor, the signal transmitter, the mutual inductance power supply device and the fixed shell are integrally arranged.
4. A lug according to claim 1 or 2, wherein: the signal transmitter comprises a temperature sensing signal processing unit and a wireless unit; the temperature sensing signal processing unit is respectively connected with the temperature sensor and the wireless unit.
5. An electrical cable, comprising: the cable comprises a cable core and an insulator coated outside the cable core; characterized in that the cable further comprises: a wire lug;
wherein the lug includes: the cable core connecting end part is connected with the cable core, and the fixed shell is packaged outside the cable core connecting end part;
the lug also includes: the signal transmitter, the temperature sensor and the mutual inductance power supply device are packaged in the fixed shell;
the sensing part of the temperature sensor is in temperature sensing contact with the connecting end part of the cable core and is electrically connected with the signal transmitter;
the mutual inductance power supply device is sleeved outside the cable core and is electrically connected with the signal transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023345409.7U CN214589296U (en) | 2020-12-31 | 2020-12-31 | Connection lug and cable with connection lug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023345409.7U CN214589296U (en) | 2020-12-31 | 2020-12-31 | Connection lug and cable with connection lug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214589296U true CN214589296U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023345409.7U Active CN214589296U (en) | 2020-12-31 | 2020-12-31 | Connection lug and cable with connection lug |
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|---|---|
| CN (1) | CN214589296U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803178A (en) * | 2020-12-31 | 2021-05-14 | 广州霍斯通电气股份有限公司 | Connection lug and cable with connection lug |
-
2020
- 2020-12-31 CN CN202023345409.7U patent/CN214589296U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803178A (en) * | 2020-12-31 | 2021-05-14 | 广州霍斯通电气股份有限公司 | Connection lug and cable with connection lug |
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