CN211122993U

CN211122993U - AC/DC voltage divider

Info

Publication number: CN211122993U
Application number: CN201921922704.9U
Authority: CN
Inventors: 陈国光; 李镇浩
Original assignee: Guangzhou Gaotie Metrology And Test Co ltd
Current assignee: Guangzhou Gaotie Metrology And Test Co ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-07-28
Anticipated expiration: 2029-11-08

Abstract

The utility model relates to a voltage measurement field specifically discloses an alternating current-direct current voltage divider, including the voltage divider main part, the upper end of voltage divider main part is provided with high-pressure wiring mouth, the equalizer ring is installed to the lower extreme of high-pressure wiring mouth, the insulator spindle is installed to the lower extreme of equalizer ring, the ground connection port is installed to unable adjustment base's upper end, and one side of unable adjustment base is connected with the sense terminal interface, the one end of sense terminal interface is connected with the digital display voltmeter through the wire, the front end of digital display voltmeter is provided with adjust knob, the manometer is installed to one side of insulator spindle. The pressure gauge and the insulating cylinder are communicated, high-pressure compressed gas is filled into the device through the compressed gas pipe connector, the stability of the capacitance value of the voltage divider is improved, the dielectric loss is reduced, the capacitance value cannot be easily influenced by surrounding objects, the pressure change in the voltage divider can be observed at any time through the pressure gauge, and the filling amount of the internal gas is increased at any time.

Description

AC/DC voltage divider

Technical Field

The utility model relates to a voltage measurement field specifically is an alternating current-direct current divider.

Background

The voltage divider is composed of voltage divider and measuring instrument, and is a balanced equipotential shielding structure, and high-quality electronic elements are used in the completely sealed insulating cylinder, so that the whole device has accurate test, good linearity and stable performance.

However, the ac/dc voltage divider in the market is externally connected with high voltage, so that the internal temperature of the voltage divider is increased due to internal resistance under high voltage during use, and thus, the measurement accuracy is easily reduced and the service life of the device is easily reduced in long-term use. Accordingly, one skilled in the art provides a dc/ac voltage divider to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an alternating current-direct current divider to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an alternating current-direct current voltage divider, includes the voltage divider main part, the upper end of voltage divider main part is provided with high-pressure wiring mouth, the equalizer ring is installed to the lower extreme of high-pressure wiring mouth, the insulating cylinder is installed to the lower extreme of equalizer ring, unable adjustment base is installed to the bottom of insulating cylinder, install mounting flange between unable adjustment base and the insulating cylinder, the ground connection port is installed to unable adjustment base's upper end, and one side of unable adjustment base is connected with the sense terminal interface, the one end of sense terminal interface is connected with the digital display voltmeter through the wire, the front end of digital display voltmeter is provided with adjust knob, the manometer is installed to one side of.

As a further aspect of the present invention: the inboard of an insulating cylinder is provided with segmentation equipotential shielding pipe, and the inboard middle-end of an insulating cylinder installs insulating round pipe, a plurality of resistance lines have been cup jointed in insulating round pipe's the outside, be provided with the flange mounting groove between unable adjustment base and the mounting flange.

As a further aspect of the present invention: the outside of resistance line is provided with the cooling tube, the outside of insulating cylinder is installed the compression trachea interface.

As a further aspect of the present invention: the compressed air pipe connector is communicated with the insulating cylinder, and condensate is filled in the inner side of the radiating pipe.

As a further aspect of the present invention: the insulating winding pipe is rotatably connected with the insulating cylinder, and a rubber pad is arranged on the inner side of the flange mounting groove.

As a further aspect of the present invention: the pressure gauge is in through connection with the insulating cylinder, the grading ring is in rotating connection with the insulating cylinder, and the mounting flange is fixedly connected with the insulating cylinder.

As a further aspect of the present invention: the digital display voltmeter is connected with the detection end interface through an electric wire, the grounding port is grounded through an electric wire, and the high-voltage wiring port is rotatably connected with the grading ring.

Compared with the prior art, the beneficial effects of the utility model are that: the pressure gauge and the insulating cylinder are arranged preferably, high-pressure compressed gas is filled into the device through the compressed gas pipe connector, the compressed gas is filled, the capacitance value of the voltage divider is accurate and stable, the dielectric loss is low, the shielding effect can be achieved, the capacitance value cannot be easily influenced by surrounding objects, the voltage divider is stable in performance and quick in reaction in measurement, the pressure change in the voltage divider can be observed at any time through the pressure gauge, the filling amount of the internal gas is increased at any time, the stability of the internal capacitance value is ensured, meanwhile, the traditional situation that the voltage divider is wound on the insulating pipe in a positive and negative mode through a Karma wire or a constantan wire is avoided, the situation that transformer oil leaks due to the structure of the voltage divider immersed in the insulating cylinder filled with the transformer oil is avoided, the service life of the voltage divider is ensured, and the size of the voltage divider is reduced by the compressed gas, make the voltage divider main part portable more, a plurality of resistance lines have intrinsic inductance and contact resistance of establishing ties through parallel connection and in addition, parallelly connected insulation resistance equipment, consequently can greatly reduce high thermal problem than traditional voltage divider, and the inside of voltage divider still is provided with the heat dissipation that the condenser pipe can help the resistance line to the life and the measurement accuracy of voltage divider have been increased.

Drawings

FIG. 1 is a schematic diagram of an AC/DC voltage divider;

FIG. 2 is a cross-sectional view of a voltage divider in an AC/DC voltage divider;

fig. 3 is a top view of an insulating cylinder in an ac/dc voltage divider.

In the figure: 1. a voltage divider body; 2. an insulating cylinder; 3. a grading ring; 4. a high-voltage wiring port; 5. a fixed base; 6. a ground port; 7. a digital display voltmeter; 8. adjusting a knob; 9. a detection end interface; 10. installing a flange; 11. a pressure gauge; 101. a segmented equipotential shielding pipe; 102. insulating the winding tube; 103. a resistance wire; 104. a radiating pipe; 105. a compressed air pipe interface; 501. and (4) mounting a flange.

Detailed Description

Please refer to fig. 1-3, in an embodiment of the present invention, an ac/dc voltage divider includes a voltage divider main body 1, a high voltage wiring port 4 is disposed at an upper end of the voltage divider main body 1, a grading ring 3 is disposed at a lower end of the high voltage wiring port 4, an insulating cylinder 2 is disposed at a lower end of the grading ring 3, a fixing base 5 is disposed at a bottom end of the insulating cylinder 2, a mounting flange 10 is disposed between the fixing base 5 and the insulating cylinder 2, a grounding port 6 is disposed at an upper end of the fixing base 5, a detection port interface 9 is connected to one side of the fixing base 5, one end of the detection port interface 9 is connected to a digital display voltmeter 7 through a wire, an adjusting knob 8 is disposed at a front end of the digital display voltmeter 7, and a manometer 11 (ac.

In fig. 1, 2, 3: the inner side of the insulating cylinder 2 is provided with a segmented equipotential shielding pipe 101, the middle end of the inner side of the insulating cylinder 2 is provided with an insulating winding pipe 102, the outer side of the insulating winding pipe 102 is sleeved with a plurality of resistance wires 103, a flange mounting groove 501 is arranged between the fixed base 5 and the mounting flange 10, the outer side of each resistance wire 103 is provided with a radiating pipe 104, the outer side of the insulating cylinder 2 is provided with a compressed air pipe interface 105, the compressed air pipe interface 105 is communicated with the insulating cylinder 2, the inner side of the radiating pipe 104 is filled with condensate, the insulating winding pipe 102 is rotatably connected with the insulating cylinder 2, the number of the resistance wires 103 is at least three, and the resistance wires are connected in parallel, the outer side of each resistance wire 103 is connected in parallel with an insulating resistance device, the inner side of the flange mounting groove 501 is provided with a rubber pad, a pressure gauge 11 is communicated with the, the digital display voltmeter 7 is connected with the detection end interface 9 through an electric wire, the grounding port 6 is grounded through an electric wire, and the high-voltage wiring port 4 is rotationally connected with the grading ring 3.

In fig. 1: pressure gauge 11 is used for observing the inside pressure value size of insulating cylinder 2, thereby utilize compressed gas pipe interface 105 to pour into compressed gas into, cooling tube 104 can absorb the heat that its produced in the use of resistance line 103, the inside thermal giving off of help insulating cylinder 2, thereby increase the life-span of receiving of voltage divider main part 1 and guarantee the measurement accuracy to the voltage value, flange mounting groove 501 sets up in mounting flange 10's installation, the connection stability of insulating cylinder 2 has been guaranteed, can prevent simultaneously that insulating cylinder 2 and unable adjustment base 5 from installing the unstable measurement accuracy that can influence insulating cylinder 2.

The utility model discloses a theory of operation is: when voltage needs to be detected, the voltage divider main body 1 is taken out of the containing box, the fixing base 5 is fixed with the ground, the insulating cylinder 2 and the equalizing ring 3 are sequentially arranged, the ground wire is firmly connected to the ground port 6 on the fixing base 5, the measured high-voltage lead is firmly connected with the high-voltage wiring port 4 at the top end of the equalizing ring 3, one end of the cable is inserted into the detection port interface 9 at the lower end of the voltage divider main body 1, the other end of the cable is inserted into the voltage measuring hole of the digital display voltmeter 7, the position of the measuring instrument is selected through the adjusting knob 8 according to the high voltage to be measured, high voltage is loaded and data is recorded, after the voltage is reduced for a period of time, until the digital display voltmeter 7 shows zero, the test circuit can be removed, the traditional voltage divider is wound on an insulating tube by a Dammar wire or constantan wire in a positive and negative manner, and the structure immersed in the insulating cylinder filled with transformer oil can generate, the external high-voltage end contacts with the resistance wire 103 in the insulating cylinder 2 to generate heat, the high-pressure compressed gas is filled into the device through the compressed gas pipe connector 105, the capacitance value of the voltage divider main body 1 is accurate and stable through the filling of the compressed gas, the dielectric loss is small, the shielding effect can be achieved, the capacitance value cannot be easily influenced by surrounding objects, the voltage divider is stable in performance and quick in response during measurement, the pressure change in the voltage divider main body 1 can be observed at any time through the pressure gauge 11, the filling amount of the internal gas is increased at any time, the stability of the internal capacitance value is guaranteed, the heating condition of the resistance wire is reduced, the radiating pipe 104 is further arranged in the voltage divider main body 1, the heat generated by the resistance wire 103 can be absorbed in use, and the dissipation of the heat in the insulating cylinder 2 is facilitated, therefore, the service life of the voltage divider main body 1 is prolonged, the measurement precision of the voltage value is guaranteed, and the measurement efficiency is improved.

The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an alternating current-direct current voltage divider, includes the voltage divider main part, its characterized in that, the upper end of voltage divider main part is provided with high-pressure wiring mouth, the equalizer ring is installed to the lower extreme of high-pressure wiring mouth, the insulating cylinder is installed to the lower extreme of equalizer ring, unable adjustment base is installed to the bottom of insulating cylinder, install mounting flange between unable adjustment base and the insulating cylinder, the ground connection port is installed to unable adjustment base's upper end, and one side of unable adjustment base is connected with the sense terminal interface, the one end of sense terminal interface is connected with the digital display voltmeter through the wire, the front end of digital display voltmeter is provided with adjust knob, the manometer is installed to one side.

2. The AC/DC voltage divider according to claim 1, wherein a segmented equipotential shielding tube is disposed inside the insulating cylinder, an insulating winding tube is installed at the middle end inside the insulating cylinder, a plurality of resistance wires are sleeved outside the insulating winding tube, and a flange installation groove is disposed between the fixing base and the installation flange.

3. The AC/DC voltage divider as claimed in claim 2, wherein a heat pipe is disposed outside the resistance wire, and a compressed air pipe connector is mounted outside the insulating cylinder.

4. The AC/DC voltage divider as claimed in claim 3, wherein the compressed air pipe is connected to the insulating tube, and the heat dissipation tube is filled with condensate inside.

5. The AC/DC voltage divider according to claim 2, wherein the insulation winding tube is rotatably connected with the insulation cylinder, and a rubber pad is arranged inside the flange installation groove.

6. The AC-DC voltage divider according to claim 1, wherein the pressure gauge is connected with the insulating cylinder in a penetrating manner, the grading ring is rotatably connected with the insulating cylinder, and the mounting flange is fixedly connected with the insulating cylinder.

7. The AC/DC voltage divider according to claim 1, wherein the digital display voltmeter is connected with the interface of the detection terminal through a wire, the grounding port is grounded through a wire, and the high voltage connection port is rotatably connected with the grading ring.