CN215955048U

CN215955048U - Temperature measuring voltage transformer

Info

Publication number: CN215955048U
Application number: CN202121432157.3U
Authority: CN
Inventors: 李泽胤
Original assignee: Tianjin Tailai Electric Power Equipment Technical Co ltd
Current assignee: Tianjin Tailai Electric Power Equipment Technical Co ltd
Priority date: 2021-06-27
Filing date: 2021-06-27
Publication date: 2022-03-04
Anticipated expiration: 2031-06-27

Abstract

The utility model relates to the technical field of transformers, in particular to a temperature measurement voltage transformer which comprises a base, wherein a shell is arranged at the upper end of the base, primary wiring terminals are fixedly arranged on two sides of the top end of the shell respectively, a transformer coil group is arranged in the shell and is arranged on the upper surface of the base, a terminal strip is arranged on one side of the shell and is provided with a plurality of wiring components, and the input end and the output end of the transformer coil group are connected with one end, positioned in the shell, of the wiring component through wires respectively. According to the temperature control device, in the long-term use process of the device, the temperature of the mutual inductor coil group is sensed through the temperature sensor and then is transmitted to the inside of the temperature controller through the lead to be displayed, so that a user can know the temperature inside the device at any time, the temperature control device is more convenient for the user to cool, the safety of the device and the user is better protected, and the device is simpler and more convenient to use.

Description

Temperature measuring voltage transformer

Technical Field

The utility model relates to the technical field of transformers, in particular to a temperature measurement voltage transformer.

Background

In the process of electric power engineering construction, the safety and reliability of power grid operation are the keys for ensuring the economic growth of electric power enterprises; meanwhile, the equipment maintenance force is also the basis for the efficient operation of the power system. The power transformation operation safety management and equipment maintenance of the power system are key factors for ensuring the safe transmission of electric energy by a power grid.

The mutual inductor is also called instrument transformer, and is a general name of a voltage mutual inductor and a current mutual inductor. Its function is mainly to convert high voltage or large current into standard low voltage (100V) or standard small current (5A or 1A, both referring to rated value) in proportion so as to realize standardization and miniaturization of measuring instrument, protection equipment and automatic control equipment. Meanwhile, the mutual inductor can be used for isolating a high-voltage system so as to ensure the safety of people and equipment.

The mutual inductor is matched with a measuring instrument and a metering device, can measure the voltage, the current and the electric energy of a primary system, is matched with a relay protection and automatic device, and can form electric protection and automatic control on various faults of a power grid. The performance and the running state of the mutual inductor directly affect the accuracy of measurement and measurement of the power system and the reliability of the action of the relay protection device, and are important conditions for ensuring the normal running of the power grid.

However, the mutual inductor generates heat during operation, which may cause the mutual inductor to generate heat and be damaged, and the main reasons are as follows:

1. the overload running time of the user is long, so that the mutual inductor is heated and burnt out.

2. The secondary short circuit of the voltage transformer is opened, and large-voltage high voltage is generated, so that the iron core of the voltage transformer is burnt out after saturation.

3. The oxidation of the primary connection contact surface of the voltage transformer is too heavy, and the contact resistance is too large, so that the voltage transformer is burnt out due to heating.

4. The voltage transformer has overlong service life, is insulated and aged, and is locally punctured or discharged to generate overvoltage, so that the voltage transformer is heated and burnt out.

5. A short circuit is arranged in the voltage transformer winding, and the input voltage is too high; the abnormal frequency of the power supply or the load harmonic, the external short circuit and the like can cause the overheating of the iron core of the voltage transformer, and the temperature rise of the winding can be abnormal.

6. When a resonance phenomenon occurs in a circuit system, the iron core of the voltage transformer generates heat to burn out insulation, and voltage breakdown between primary and secondary is caused.

Therefore, it is necessary to monitor the temperature of the voltage transformer in real time.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a temperature measurement voltage transformer which can effectively solve the problems in the background technology.

In order to achieve the purpose, the utility model adopts the technical scheme that:

temperature measurement voltage transformer, the on-line screen storage device comprises a base, base upper end installation casing, binding post is once fixed mounting respectively to casing top both sides, the inside mutual-inductor coil assembly that is equipped with of casing, mutual-inductor coil assembly installs in the base upper surface, casing one side is equipped with the terminal row, be equipped with a plurality of wiring subassemblies on the terminal row, mutual-inductor coil assembly's input and output are located the inside one end interconnect of casing through wire and wiring subassembly respectively, it has temperature sensor to encapsulate through the resin on the mutual-inductor coil assembly, temperature sensor is located the inside one end interconnect of casing through wire and wiring subassembly, is connected with temperature sensor wiring subassembly outside one end interconnects through wire and temperature controller.

Preferably, the terminal strip is installed inside the limiting groove in a penetrating mode, the limiting groove is arranged in the middle of one side of the shell in a penetrating mode, one end, located inside the shell, of the terminal strip is close to a limiting plate fixedly installed at one end of the transformer coil assembly, and the limiting plate is connected with the shell through bolts.

Preferably, each of the terminal assemblies includes a connector, each of the connector sections is installed at the upper and lower ends of the terminal block, and a sliding groove is respectively formed in the middle of each of the two ends of one side of each of the connectors, which is far away from the terminal block.

Preferably, one end of a sliding block is movably mounted inside each sliding groove, the other end of each sliding block is connected with one end of a semicircular limiting block, and a limiting groove penetrates through the middle of the opposite surface of each semicircular limiting block.

Preferably, each of the retaining grooves is engaged with each other.

Preferably, two ends of the opposite surface of each semicircular limiting block, which are close to one side of the sliding block, are movably penetrated with mounting screws through threads respectively, and the screws are parallel to each other.

Compared with the prior art, the utility model has the following beneficial effects:

(1) according to the temperature control device, in the long-term use process of the device, the temperature of the mutual inductor coil group is sensed through the temperature sensor and then is transmitted to the inside of the temperature controller through the lead to be displayed, so that a user can know the temperature inside the device at any time, the temperature control device is more convenient for the user to cool, the safety of the device and the user is better protected, and the device is simpler and more convenient to use.

(2) According to the terminal block, the wires are not required to be welded and arranged at one end of the terminal block, each wire can be conveniently arranged and replaced at a later stage, a worker can conveniently use the terminal block, finally, the semicircular limiting blocks are re-arranged through the threads by screws, each wire is not prone to falling off after being arranged, and the safety of the terminal block and the worker can be better protected.

The advantage of this is that on the one hand, the probe of temperature sensor can be fixed, and on the other hand can ensure that the temperature sensor probe is contacted with the product steadily, guarantees the accuracy of detection, makes measurement, control terminal can in time accurately carry out control and protection action.

Drawings

FIG. 1 is a schematic view of the overall structure of a temperature measuring voltage transformer according to the present invention;

FIG. 2 is a schematic structural diagram of a transformer coil assembly and a temperature sensor of the thermometric voltage transformer of the present invention;

FIG. 3 is a schematic diagram of a top view structure of a terminal block of the temperature measuring voltage transformer of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3 of the thermometric voltage transformer of the present invention;

in the figure: 1. a housing; 101. a limiting groove; 2. a base; 3. a primary wiring terminal; 4. a terminal block; 401. a limiting plate; 402. a bolt; 5. a wiring assembly; 501. a joint; 502. a chute; 503. a screw; 504. a slider; 505. a semicircular limiting block; 506. a limiting groove; 6. a temperature controller; 7. a transformer coil assembly; 8. a temperature sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1-4, the temperature measurement voltage transformer comprises a base 2, a housing 1 is installed at the upper end of the base 2, primary wiring terminals 3 are respectively and fixedly installed at two sides of the top end of the housing 1, a transformer coil group 7 is arranged inside the housing 1, the transformer coil group 7 is installed on the upper surface of the base 2, a terminal strip 4 is arranged on one side of the housing 1, a plurality of wiring components 5 are arranged on the terminal strip 4, the input end and the output end of the transformer coil group 7 are respectively connected with one end of the wiring components 5 inside the housing 1 through wires, a temperature sensor 8 is packaged on the transformer coil group 7 through resin, the temperature sensor 8 is connected with one end of the wiring components 5 inside the housing 1 through wires, and one end of the outer side of the wiring components 5 connected with the temperature sensor 8 is connected with a temperature controller 6 through wires.

Through the technical scheme, when the device is used, the transformer coil group 7 consists of a primary winding and a secondary winding, the primary wiring terminal 3 is connected with two ends of the primary winding, the upper end of the primary wiring terminal 3 is connected with a high-voltage wire, the lower end of the primary wiring terminal is connected with the transformer coil group 7, when the device is used, voltage enters the transformer coil group 7 through the primary wiring terminal 3, then the transformer coil group 7 outputs the converted power, the temperature sensor 8 monitors the temperature of the transformer coil group 7, meanwhile, the temperature data is transmitted to the inside of the temperature controller 6 through the wiring components 5 and the terminal row 4 to be displayed, a worker can better control the internal temperature of the transformer coil group 7, meanwhile, two of the wiring components 5 are connected with the input end of the transformer coil group 7, and two are connected with the output end of the transformer coil group 7, leave two and interconnect through wire and temperature controller 6, make things convenient for this device to work more, simultaneously when installing the wire, can drive spacing groove 506 through semicircle stopper 505 and install the wire, avoided when installing the wire, through welded mounting in terminal row 4 upper ends, cause and be difficult for changing the wire in the later stage, can install in dismantling terminal row 4 through bolt 402 and limiting plate 401's cooperation simultaneously, make things convenient for the staff to detect this device inside in the later stage more, this device of protection and staff's of change safety.

When specifically setting up, terminal row 4 runs through and installs inside spacing groove 101, and spacing groove 101 runs through and locates casing 1 one side in the middle of, and terminal row 4 is located casing 1 inside one end and is close to mutual-inductor coil group 7 one end fixed mounting limiting plate 401, and limiting plate 401 is through bolt 402 and casing 1 interconnect. When terminal row 4 needs to be installed, terminal row 4 is installed in limiting groove 101, limiting plate 401 is used for limiting the clamping length of terminal row 4, terminal row 4 is better installed, and terminal row 4 is connected with housing 1 through bolt 402, so that terminal row 4 is kept stable, and the terminal row 4 can work better.

When specifically setting up, every wiring subassembly 5 is including connecting 501, and every connects 501 subsection and installs both ends about terminal row 4, and every connects 501 to keep away from terminal row 4 one side both ends in the middle of being equipped with spout 502 respectively, and the inside movable mounting slider 504 one end respectively of every spout 502, the other end of every slider 504 respectively with semicircle stopper 505 one end interconnect, run through respectively in the middle of every semicircle stopper 505 opposite face and be equipped with spacing groove 506. When needs are installed the wire, dismantle screw 503 through the screw earlier, then the staff promotes semicircle stopper 505 to both sides, slider 504 removes supplementary semicircle stopper 505 in spout 502 inside simultaneously, then install the wire in connecting 501 inside, then promote semicircle stopper 505 and drive spacing groove 506 and remove to the centre, carry out spacing fixed to the wire, make the wire need not through welded mounting in the one end of terminal row 4, it installs in the change to make things convenient for every wire in the later stage more, make things convenient for the staff to use more.

When the positioning structure is specifically arranged, each limiting groove 506 is engaged relatively, two ends of the opposite surface of each semicircular limiting block 505, which are close to one side of the sliding block 504, penetrate through the mounting screws 503 through threads, and the screws 503 are parallel to each other. After semicircle stopper 505 is fixed the completion through slider 504 removal to the wire in that spout 502 is inside, make screw 503 install in semicircle stopper 505 inside again through the screw thread, fix the semicircle stopper 505 that every interlock is parallel mutually, make every wire install the completion back, be difficult for droing, this device of better protection and staff's safety.

The working principle of the temperature measurement voltage transformer is as follows:

when in use, when each conducting wire needs to be installed, firstly, the screw 503 is disassembled through threads, then a worker pushes the semicircular limiting blocks 505 to two sides, meanwhile, the sliding block 504 moves in the sliding groove 502 to assist the semicircular limiting blocks 505 to move, then, the conducting wires are installed in the connector 501, then, the semicircular limiting blocks 505 are pushed to drive the limiting grooves 506 to move towards the middle, the conducting wires are limited and fixed, then, after the semicircular limiting blocks 505 move in the sliding groove 502 through the sliding block 504 to fix the conducting wires, the screw 503 is reinstalled in the semicircular limiting blocks 505 through threads, each semicircular limiting block 505 which are mutually meshed and parallel is fixed, each conducting wire is not easy to fall off after being installed, and meanwhile, when the device works, the temperature sensor 8 monitors the temperature of the transformer coil group 7, and then transmits the temperature data to the inside of the temperature controller 6 for displaying through the wiring assembly 5 and the terminal block 4.

It should be noted that the specific model of the temperature controller 6 is as follows: AI-518/518P.

It should be noted that the specific types of the temperature sensor 8 are: PT100 platinum temperature sensor, temperature range: -50 ℃ to 200 ℃ and its resistance varies with temperature.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. Temperature measurement voltage transformer, including base (2), its characterized in that: a shell (1) is arranged at the upper end of the base (2), primary wiring terminals (3) are respectively and fixedly arranged at two sides of the top end of the shell (1), a mutual inductor coil group (7) is arranged in the shell (1), the mutual inductor coil group (7) is arranged on the upper surface of the base (2), a terminal strip (4) is arranged on one side of the shell (1), a plurality of wiring components (5) are arranged on the terminal strip (4), the input end and the output end of the mutual inductor coil group (7) are respectively connected with one end of the wiring component (5) positioned in the shell (1) through leads, a temperature sensor (8) is encapsulated on the mutual inductor coil group (7) through resin, the temperature sensor (8) is connected with one end of the wiring component (5) positioned in the shell (1) through a lead, one end of the outer side of the wiring component (5) connected with the temperature sensor (8) is connected with the temperature controller (6) through a lead.

2. The thermometric voltage transformer of claim 1, wherein: terminal row (4) run through and install inside spacing groove (101), spacing groove (101) run through locate casing (1) one side in the middle of, terminal row (4) are located casing (1) inside one end and are close to mutual-inductor coil assembly (7) one end fixed mounting limiting plate (401), limiting plate (401) are through bolt (402) and casing (1) interconnect.

3. The thermometric voltage transformer of claim 1, wherein: each wiring subassembly (5) is including connecting (501), every connect (501) install both ends about terminal row (4) in the subsection, every connect (501) keep away from terminal row (4) one side both ends centre and be equipped with spout (502) respectively.

4. The thermometric voltage transformer of claim 3, wherein: one end of a sliding block (504) is movably mounted in each sliding groove (502), the other end of each sliding block (504) is connected with one end of a semicircular limiting block (505) respectively, and a limiting groove (506) penetrates through the middle of the opposite surface of each semicircular limiting block (505) respectively.

5. The thermometric voltage transformer of claim 4, wherein: each limiting groove (506) is meshed oppositely.

6. The thermometric voltage transformer of claim 4, wherein: two ends of the opposite surface of each semicircular limiting block (505) close to one side of the sliding block (504) are movably penetrated with mounting screws (503) through threads respectively, and the screws (503) are parallel to each other.