CN109581159B - Insulating liquid state, gaseous state and gas-liquid mixture state dielectric property test chamber - Google Patents
Insulating liquid state, gaseous state and gas-liquid mixture state dielectric property test chamber Download PDFInfo
- Publication number
- CN109581159B CN109581159B CN201811451469.1A CN201811451469A CN109581159B CN 109581159 B CN109581159 B CN 109581159B CN 201811451469 A CN201811451469 A CN 201811451469A CN 109581159 B CN109581159 B CN 109581159B
- Authority
- CN
- China
- Prior art keywords
- cavity
- insulating
- gas
- liquid
- insulating block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses an insulating liquid state, gas state and gas-liquid mixed state dielectric property testing cavity which comprises a cavity barrel, a cavity cover arranged at the top of the cavity barrel and a supporting frame arranged at the bottom of the cavity barrel, wherein a high-voltage electrode, a testing electrode, a first insulating block, a second insulating block, a third insulating block and a fourth insulating block are arranged in the cavity barrel; the testing electrode is sleeved outside the high-voltage electrode, an annular testing cavity is formed between the testing electrode and the high-voltage electrode, the testing cavity is used for containing a medium to be tested, a heating source for heating the medium is arranged inside the high-voltage electrode, the rest part inside the cavity barrel is filled with all the insulating blocks, a gas-state testing hole and a liquid-state testing hole which are communicated with the testing cavity are formed in the side wall of the cavity barrel, and the top and the bottom of the cavity barrel are also respectively connected with a liquid regulating pipe and a gas regulating pipe; the dielectric characteristic test cavity has the advantages that the miniaturization of the volume of the dielectric characteristic test cavity and the comprehensiveness of functions are realized, the maximum liquid requirement amount of a single test can be reduced, and the functions of vacuum, liquid regulation, pressure measurement, pressure regulation, temperature control, temperature measurement and observation can be realized.
Description
Technical Field
The invention relates to the technical field of dielectric property testing of insulating liquid, in particular to a liquid, gas and gas-liquid mixed dielectric property testing cavity of insulating liquid.
Background
The phase-change cooling technology relies on a low-boiling-point fluorinated liquid product and is mature to be applied to a heat dissipation technology. Compared with the traditional chlorofluorocarbon, hydrochlorofluorocarbon or even hydrofluorocarbon, the fluorinated liquid developed by companies such as 3M and Kemu has the characteristics of non-flammability, non-toxicity, high insulation, low GWP (Global Warming potential) and low ODP (ozone Depletion potential), and has become one of the first-choice schemes for heat dissipation of power electronic devices and equipment.
However, when the device is applied to high-power electronic devices and equipment, the insulation problem caused by the high-voltage working condition of the device is urgently examined.
Therefore, it is a technical problem to be solved by those skilled in the art to provide a liquid-based dielectric property testing chamber, a gas-based dielectric property testing chamber and a gas-liquid mixed dielectric property testing chamber for electrical property research of low boiling point media such as fluorinated liquid.
Disclosure of Invention
The invention aims to provide an insulating liquid state, gas state and gas-liquid mixed state dielectric property testing cavity, which solves the problems in the prior art, realizes the miniaturization of the volume of the dielectric property testing cavity and the comprehensiveness of functions, can reduce the maximum liquid demand of a single test, and can realize the functions of vacuum, liquid regulation, pressure measurement, pressure regulation, temperature control, temperature measurement and observation.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an insulating liquid state, gas state and gas-liquid mixed state dielectric property testing cavity which comprises a cavity barrel, a cavity cover arranged at the top of the cavity barrel and a supporting frame arranged at the bottom of the cavity barrel, wherein a high-voltage electrode, a testing electrode, a first insulating block, a second insulating block, a third insulating block and a fourth insulating block are arranged in the cavity barrel;
the test electrode sleeve is arranged outside the high-voltage electrode, and an annular test cavity is reserved between the test electrode and the high-voltage electrode; the high-voltage electrode is internally provided with a heating source, the high-voltage electrode is connected to an external test loop through a high-voltage electrode leading-out terminal, and the test electrode is connected with the external test loop through a test electrode leading-out terminal;
the first insulating block is sleeved outside the test electrode, and an observation space is respectively reserved between two sides of the first insulating block and the cavity barrel; the second insulating block is arranged at the top end of the high-voltage electrode, the third insulating block is sleeved outside the second insulating block, a first shielding ring which is integrally arranged with the cavity cover is arranged between the second insulating block and the third insulating block, the fourth insulating block is arranged at the bottom end of the high-voltage electrode, a second shielding ring is arranged between the fourth insulating block and the first insulating block, and the second shielding ring is integrally arranged with a sealing groove block at the bottom of the fourth insulating block;
the top and the bottom of the rear end of the cavity barrel are respectively provided with a gas state testing hole and a liquid state testing hole, the gas state testing hole sequentially penetrates through the side wall of the cavity barrel, the observation space at the rear end of the cavity barrel, the third insulating block and the first shielding ring to be communicated with the testing cavity, and the liquid state testing hole sequentially penetrates through the side wall of the cavity barrel, the observation space at the rear end of the cavity barrel, the third insulating block and the second shielding ring to be communicated with the testing cavity; the two thermocouples are respectively inserted into the gas state test hole and the liquid state test hole in a penetrating way, and test probes of the two thermocouples extend into the test cavity; one sides of the two thermocouples, which are close to the cavity barrel, are respectively provided with a pressure transmitter;
the top and the bottom of the front end in the cavity barrel are respectively provided with a first through hole and a second through hole, the first through hole is opposite to the gas-state testing hole, the first through hole is formed in the third insulating block and the first shielding ring, the second through hole is opposite to the liquid-state testing hole, the second through hole is formed in the third insulating block and the second shielding ring, and the first through hole and the second through hole can enable the testing cavity to be communicated with the observation space at the front end;
the top and the bottom of chamber bucket still are provided with air transfer pipe and liquid transfer pipe respectively, air transfer pipe and front end survey the space intercommunication, liquid transfer pipe and rear end survey the space intercommunication.
Preferably, the side wall of the front end of the cavity barrel is further provided with an observation port communicated with the observation space at the front end of the cavity barrel, the observation port is provided with an observation window with liquid level scales, and the observation window is fixed on the cavity barrel through an observation window sealing frame.
Preferably, set up on the chamber bucket lateral wall gaseous state test hole with all install a temperature, pressure measurement integrated valve on the liquid state test hole, the test probe end of thermocouple passes temperature, pressure measurement integrated valve stretch into in the test chamber, pressure transmitter install in on the temperature, pressure measurement integrated valve, through the temperature, pressure measurement integrated valve measure hydraulic pressure and atmospheric pressure in the test chamber.
Preferably, a rod body of the thermocouple extending out of the other end of the temperature and pressure measuring integrated valve is further sleeved with a heat insulation pipe, one end of the heat insulation pipe extends into the temperature and pressure measuring integrated valve, the other end of the heat insulation pipe is sealed and fixed by a thermocouple sealing block, and the heat insulation pipe and the sealing block are both made of heat insulation materials.
Preferably, the top of the second insulating block is further provided with an insulating end which penetrates through the cavity cover and extends out of the cavity barrel, the high-voltage electrode leading-out terminal is arranged at the top of the high-voltage electrode, and the high-voltage electrode leading-out terminal penetrates through the insulating end and extends out of the cavity barrel.
Preferably, a connecting lug is transversely arranged at the top end of the test electrode, the bottom end of the test electrode leading-out terminal is inserted into the connecting lug, an insulating flange is installed in the cavity cover, a through hole opposite to the connecting lug is formed in the insulating flange, and the top end of the test electrode leading-out terminal penetrates through the third insulating block and the insulating flange and extends out of the cavity barrel.
Preferably, be provided with on the chamber lid and be used for the installation insulating flange's mounting groove, insulating flange bottom with be provided with the oil blanket between the tank bottom of mounting groove, the insulating flange top is fixed through the gland flange, just the end is drawn forth at the top of insulating flange the stretching out in the gland flange.
Preferably, the top of the cavity cover is further provided with a grounded shield electrode lead-out terminal.
Preferably, a sealing disc for sealing the sealing groove block is further arranged at the bottom of the cavity barrel, a through hole is formed in the middle of the fourth insulating block, the middle of the sealing groove block and the middle of the sealing disc, the heating source is a heating rod, the heating rod penetrates through the through hole and is inserted into the high-voltage electrode, and power is introduced into the heating rod through a heating rod leading-out wire at the bottom of the heating rod; the heating rod is also provided with a temperature feedback device.
Preferably, the support frame include the supporting seat with set up in the supporting leg of supporting seat bottom, the top of supporting seat is provided with the fixed slot, the tank bottom of fixed slot is provided with the through-hole, the bottom of chamber bucket is fixed in the fixed slot, the fourth insulating block sealed groove block with the through-hole at the middle part of sealed dish with through-hole on the supporting seat is concentric hole.
Preferably, O-ring seals are disposed between the top end surface of the second insulating block and the bottom end surface of the cavity cover, between the bottom end surface of the second insulating block and the top end surface of the high-voltage electrode, between the top end surface of the cavity barrel and the bottom end surface of the cavity cover, between the top end surface of the fourth insulating block and the bottom end surface of the high-voltage electrode, between the bottom end surface of the fourth insulating block and the top end surface of the sealing groove block, and between the bottom of the sealing groove block and the cavity barrel.
Compared with the prior art, the invention has the following beneficial technical effects:
the insulating liquid state, gas state and gas-liquid mixed state dielectric property test cavity provided by the invention realizes a broadband research test scheme for the dielectric property, dielectric loss property and conductive property of the liquid state, gas state and gas-liquid mixed state of the insulating liquid aiming at the electrical property research of a low boiling point medium; meanwhile, the miniaturization of the volume of the dielectric characteristic testing cavity and the comprehensiveness of functions are realized, the maximum liquid requirement of a single test can be reduced, and the functions of vacuum, liquid regulation, pressure measurement, pressure regulation, temperature control, temperature measurement and observation can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a perspective view of a dielectric property testing chamber for liquid, gas and gas-liquid mixture of insulating liquid according to the present invention;
FIG. 2 is another perspective view of the dielectric constant measuring chamber of the present invention in liquid, gas and gas-liquid mixture state;
FIG. 3 is a top view of the dielectric property testing chamber for liquid, gas and gas-liquid mixture of the insulating liquid according to the present invention;
FIG. 4 is a sectional view taken along line A-A of FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a partial enlarged view of FIG. 4 at B;
FIG. 7 is a sectional view taken along line B-B of FIG. 3;
FIG. 8 is a front view of the cavity barrel of the present invention;
FIG. 9 is a cross-sectional view taken along line C-C of FIG. 8;
FIG. 10 is a rear view of the cavity barrel of the present invention;
FIG. 11 is a perspective view of the stand of the present invention;
in the figure: 1-cavity barrel, 2-cavity cover, 3-support frame, 4-high voltage electrode, 5-test electrode, 6-first insulating block, 7-second insulating block, 8-third insulating block, 9-fourth insulating block, 10-test cavity, 11-test electrode leading-out terminal, 12-high voltage electrode leading-out terminal, observation space at front end of 13-cavity barrel, observation space at rear end of 14-cavity barrel, 15-first shielding ring, 16-second shielding ring, 17-shielding electrode leading-out terminal, 18-connecting lug, 19-insulating flange, 20-oil seal, 21-gland flange, 22-sealing groove block, 23-sealing disc, 24-heating rod, 25-heating rod leading-out wire, 26-gas testing hole, 27-liquid testing hole, 28-a first through hole, 29-a second through hole, 30-a thermocouple, 31-a pressure transmitter, 32-a temperature and pressure measurement integrated valve, 33-a heat insulation pipe, 34-a thermocouple sealing block, 35-an observation window, 36-an observation window sealing frame, 37-a gas regulating pipe, 38-a liquid regulating pipe, 39-a supporting seat, 40-a supporting leg and 41-a fixing groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
The invention aims to provide a dielectric property testing cavity for insulating liquid state, gas state and gas-liquid mixed state, which aims to solve the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The embodiment provides an insulating liquid state, gas state and gas-liquid mixture state dielectric property testing cavity, as shown in fig. 1-10, which comprises a cavity barrel 1, a cavity cover 2 fixed on the top of the cavity barrel 1 through a positioning pin and a bolt, and a support frame 3 arranged at the bottom of the cavity barrel 1, wherein the cavity barrel 1, the cavity cover 2 and the support frame 3 are all made of stainless steel, and a high-voltage electrode 4, a testing electrode 5, a first insulating block 6, a second insulating block 7, a third insulating block 8 and a fourth insulating block 9 are arranged inside the cavity barrel 1;
in the embodiment, the test electrode 5 and the high-voltage electrode 4 are made of high-heat-conduction materials such as copper or stainless steel, the test electrode 5 is sleeved outside the high-voltage electrode 4, and the inner aperture of the test electrode 5 is larger than the outer diameter of the high-voltage electrode 4, so that an annular test cavity 10 is reserved between the test electrode 5 and the high-voltage electrode 4; a heating source is arranged in the high-voltage electrode 4, and heats a medium in the testing cavity 10 (electrode gap) through the high-voltage electrode 4;
the high-voltage electrode 4 is connected to an external test loop through a high-voltage electrode leading-out terminal 12, and the test electrode 5 is connected with the external test loop through a test electrode leading-out terminal 11;
each insulating block is made of insulating filling materials and is mainly used for isolating electrode potentials, realizing the standard distance between electrodes, fixing the high-voltage electrode leading-out terminal 12 and the test electrode leading-out terminal 11 and filling the space outside the electrodes in the cavity barrel 1 so as to reduce the liquid demand of single test; specifically, the first insulating block 6 is sleeved outside the test electrode 5, and the front side and the rear side of the first insulating block 6 are partially longitudinally cut, so that an observation space (an observation space 13 at the front end of the cavity barrel and an observation space 14 at the rear end of the cavity barrel) is respectively reserved between the two sides of the first insulating block 6 and the cavity barrel 1; the second insulating block 7 is arranged at the top end of the high-voltage electrode 4, the third insulating block 8 is sleeved outside the second insulating block 7, a first shielding ring 15 made of stainless steel and integrally arranged with the cavity cover 2 is arranged between the second insulating block 7 and the third insulating block 8, the fourth insulating block 9 is arranged at the bottom end of the high-voltage electrode 4, a second shielding ring 16 is arranged between the fourth insulating block 9 and the first insulating block 6, the second shielding ring 16 is made of stainless steel and integrally arranged with a sealing groove block 22 at the bottom of the fourth insulating block 9; correspondingly, a grounded shielding electrode leading-out terminal 17 is arranged at the top of the cavity cover 2, and the uneven electric fields at the edges of the two ends of the high-voltage electrode 4 and the test electrode 5 are shielded by the first shielding ring 15 and the second shielding ring 16.
In order to fix and insulate the high-voltage electrode leading-out terminal 12 and the test electrode leading-out terminal 11, in this embodiment, for the high-voltage electrode leading-out terminal 12, the top of the second insulating block 7 is further provided with an insulating end which penetrates through the cavity cover 2 and extends out of the cavity barrel 1, the insulating end is of a hollow round rod structure, the high-voltage electrode leading-out terminal 12 is arranged at the top of the high-voltage electrode 4, and the high-voltage electrode leading-out terminal 12 extends out of the cavity barrel 1 through the insulating end; for the test electrode leading-out terminal 11, a connecting lug 18 is transversely arranged at the top end of the test electrode 5, the bottom end of the test electrode leading-out terminal 11 is inserted into the connecting lug 18, an insulating flange 19 is arranged in the cavity cover 2, a through hole opposite to the connecting lug 18 is formed in the insulating flange 19, and the top end of the test electrode leading-out terminal 11 extends out of the cavity barrel 1 through the third insulating block 8 and the insulating flange 19; specifically, the cavity cover 2 is provided with a mounting groove for mounting the insulating flange 19, a leakage-proof oil seal 20 is arranged between the bottom of the insulating flange 19 and the bottom of the mounting groove, the top of the insulating flange 19 is fixed through a gland flange 21, the leading-out end at the top of the insulating flange 19 extends out of the gland flange 21, and a gland is fixedly connected with the cavity cover 2 through a flange bolt.
Specifically, in this embodiment, the bottom of the cavity barrel 1 is further provided with a sealing disc 23 for sealing the sealing groove block 22, the middle parts of the fourth insulating block 9, the sealing groove block 22 and the sealing disc 23 are provided with through holes, the heating source is a heating rod 24, the heating rod 24 penetrates through the through holes and is inserted into the high-voltage electrode 4, and the heating rod 24 introduces power through a heating rod outgoing line 25 at the bottom; the heating rod 24 is also provided with a temperature feedback device; the temperature feedback device is a device for maintaining the surface temperature of the high-voltage electrode 4 at the target temperature by utilizing the temperature-sensitive characteristic of the self resistance of the heating rod 24 or the temperature feedback of an external measuring thermocouple wire.
Temperature control and temperature and pressure measurement:
in this embodiment, the heating rod 24 heats the medium in the testing chamber 10 through the high voltage electrode 4, and the temperature of the surface of the high voltage electrode 4 is maintained at the target temperature by using the temperature-sensitive characteristic of the resistance of the heating rod 24 itself or the temperature feedback of the external measurement thermocouple.
In this embodiment, a gas state test hole 26 and a liquid state test hole 27 are further respectively formed in the top and the bottom of the rear end of the cavity barrel 1, the gas state test hole 26 sequentially penetrates through the side wall of the cavity barrel 1, the observation space 14 in the rear end of the cavity barrel, the third insulating block 8 and the first shielding ring 15 to be communicated with the test cavity 10, and the liquid state test hole 27 sequentially penetrates through the side wall of the cavity barrel 1, the observation space 14 in the rear end of the cavity barrel, the third insulating block 8 and the second shielding ring 16 to be communicated with the test cavity 10; the top and the bottom of the front end in the cavity barrel 1 are respectively provided with a first through hole 28 and a second through hole 29, the first through hole 28 is opposite to the gas-state testing hole 26, the first through hole and the gas-state testing hole are coaxial holes and have the same diameter, and the first through hole 28 is arranged on the third insulating block 8 and the first shielding ring 15; the second through hole 29 is opposite to the liquid test hole 27, the two are coaxial holes and have the same diameter, the second through hole 29 is arranged on the third insulating block 8 and the second shielding ring 16, and the first through hole 28 and the second through hole 29 can enable the test cavity 10 to be communicated with the observation space 13 at the front end of the cavity barrel.
In specific operation, the outer diameter of the bottom end of the second insulating block 7 is set to be smaller than that of the top end, so that a gap communicated with the test cavity 10 is formed between the bottom end of the second insulating block 7 and the first shielding ring 15, and the gaseous test hole 26 and the first through hole 28 can be communicated with the test cavity 10 after penetrating through the first shielding ring 15; similarly, the top outer diameter of the fourth insulating block 9 is set to be smaller than the bottom outer diameter, so that a gap communicated with the test chamber 10 also exists between the top end of the fourth insulating block 9 and the second shielding ring 16, and the liquid test hole 27 and the second through hole 29 can be communicated with the test chamber 10 after passing through the second shielding ring 16.
In this embodiment, two thermocouples 30 are respectively inserted into the gas test hole 26 and the liquid test hole 27, and the test probes of the two thermocouples 30 extend into the test chamber 10; one sides of the two thermocouples 30 close to the cavity barrel 1 are respectively provided with a pressure transmitter 31;
specifically, a temperature and pressure measuring integrated valve 31 is installed on a gas state testing hole 26 and a liquid state testing hole 27 which are formed in the side wall of the cavity barrel 1, a testing probe end of a thermocouple 30 penetrates through the temperature and pressure measuring integrated valve 31 and extends into the testing cavity 10, a pressure transmitter 31 is installed on the temperature and pressure measuring integrated valve 32, hydraulic pressure and air pressure in the testing cavity 10 are measured through the temperature and pressure measuring integrated valve 32, the thermocouple 30 extends out of a rod body at the other end of the temperature and pressure measuring integrated valve 32, a heat insulation pipe 33 is further sleeved on the rod body at the other end of the heat insulation pipe 33, one end of the heat insulation pipe 33 extends into the temperature and pressure measuring integrated valve 32, the other end of the heat insulation pipe is sealed and fixed through a thermocouple sealing block 34, and the heat insulation pipe 33 and the.
The thermocouple 30 is of a full stainless steel structure, a thermocouple wire is arranged in the thermocouple 30, and the outer metal of the thermocouple wire is in direct contact with the thermocouple wire to influence the heat conduction process of the thermocouple wire on the shell of the thermocouple 30, so that errors are generated between temperature data measured by the thermocouple 30 and the temperature of a test point at the end part of a probe, and therefore, a thermocouple sealing block 34 for fixing the thermocouple 30 and a heat insulation pipe 33 are both made of heat insulation materials, direct thermal contact with the cavity barrel 1 is avoided, and temperature test errors are prevented.
For the medium quality observation and control aspects:
in this embodiment, the front end side wall of the cavity barrel 1 is further provided with an observation port communicated with the observation space 13 at the front end of the cavity barrel, the observation port is provided with an observation window 35 with liquid level scales, the observation window 35 is a quartz observation window, the observation window 35 is fixed on the cavity barrel 1 through an observation window sealing frame 36, and the observation window sealing frame 36 is fixed with the cavity barrel 1 through a bolt circumferentially arranged.
In this embodiment, the medium in the test chamber 10 is an actual measured object, and the gas-liquid ratio caused by the form and evaporation of the medium cannot be observed due to shielding of the electrodes, and the electrode gap is usually only 2-3mm, so that it is not easy to integrate relatively large measurement probe devices such as the thermocouple 30 and the pressure transmitter 31 under a sealed condition. Therefore, the test chamber 10 is communicated with the observation space 13 at the front end of the chamber barrel through the first through hole 28 and the second through hole 29 at the front end, and the liquid level in the two spaces can be ensured to be equipotential, and the liquid level can be observed and read through the observation window 35 on the chamber barrel 1 and the surface scale thereof. The gas state testing hole 26 and the liquid state testing hole 27 which are communicated with the rear end are used for communicating the testing cavity 10 with the observation space 14 at the rear end of the cavity barrel, the pressure transmitter 31 can measure the hydraulic pressure and the air pressure on the same pressure surface, and meanwhile, the thermocouple 30 extends into the space between the electrodes through the gas state testing hole 26 and the liquid state testing hole 27 to reach the position of the measured medium most accurately
For media control aspects:
in this embodiment, the top and the bottom of the cavity barrel 1 are respectively provided with an air adjusting pipe 37 and a liquid adjusting pipe 38, the air adjusting pipe 37 is communicated with the observation space 13 at the front end of the cavity barrel, and the liquid adjusting pipe 38 is communicated with the observation space 14 at the rear end of the cavity barrel; the cavity barrel 1 can be vacuumized and injected with liquid through the liquid regulating pipe 38 at the bottom of the cavity barrel 1 or the gas regulating pipe 37 on the cavity cover 2, and after the medium is heated and evaporated, the liquid is pumped through the liquid regulating pipe 38 or the gas regulating pipe 37 is connected with a compression tank to regulate and control the liquid amount and the air pressure in the cavity, so that the saturation state of the medium can be flexibly controlled. After the experiment is finished, the air pressure in the cavity can be recovered through the air adjusting pipe 37, and the sample liquid can be pumped out through the liquid adjusting pipe 38.
For the sealing performance of the chamber barrel 1:
in this embodiment, O-ring seals are disposed between the top end surface of the second insulating block 7 and the bottom end surface of the chamber cover 2, between the bottom end surface of the second insulating block 7 and the top end surface of the high voltage electrode 4, between the top end surface of the chamber barrel 1 and the bottom end surface of the chamber cover 2, between the top end surface of the fourth insulating block 9 and the bottom end surface of the high voltage electrode 4, between the bottom end surface of the fourth insulating block 9 and the top end surface of the seal groove block 22, and between the bottom of the seal groove block 22 and the chamber barrel 1.
As for the specific structure of the supporting frame 3, as shown in fig. 11, in this embodiment, the supporting frame 3 includes a supporting base 39 and a supporting leg 40 disposed at the bottom of the supporting base 39, a fixing groove 41 is disposed at the top of the supporting base 39, a through hole is disposed at the bottom of the fixing groove 41, the bottom of the cavity barrel 1 is fixed in the fixing groove 41, and the bottom of the fixing groove 41 is fixedly connected to the cavity barrel 1 through a bolt circumferentially disposed; and the through holes in the middle of the fourth insulating block 9, the sealing groove block 22 and the sealing disc 23 are concentric with the through hole in the support seat 39.
The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (10)
1. A dielectric property test chamber for insulating liquid state, gas state and gas-liquid mixed state is characterized in that: the testing device comprises a cavity barrel, a cavity cover arranged at the top of the cavity barrel and a supporting frame arranged at the bottom of the cavity barrel, wherein a high-voltage electrode, a testing electrode, a first insulating block, a second insulating block, a third insulating block and a fourth insulating block are arranged in the cavity barrel;
the test electrode sleeve is arranged outside the high-voltage electrode, and an annular test cavity is reserved between the test electrode and the high-voltage electrode; the high-voltage electrode is internally provided with a heating source, the high-voltage electrode is connected to an external test loop through a high-voltage electrode leading-out terminal, and the test electrode is connected with the external test loop through a test electrode leading-out terminal;
the first insulating block is sleeved outside the test electrode, and an observation space is respectively reserved between two sides of the first insulating block and the cavity barrel; the second insulating block is arranged at the top end of the high-voltage electrode, the third insulating block is sleeved outside the second insulating block, a first shielding ring which is integrally arranged with the cavity cover is arranged between the second insulating block and the third insulating block, the fourth insulating block is arranged at the bottom end of the high-voltage electrode, a second shielding ring is arranged between the fourth insulating block and the first insulating block, and the second shielding ring is integrally arranged with a sealing groove block at the bottom of the fourth insulating block;
the top and the bottom of the rear end of the cavity barrel are respectively provided with a gas state testing hole and a liquid state testing hole, the gas state testing hole sequentially penetrates through the side wall of the cavity barrel, the observation space at the rear end of the cavity barrel, the third insulating block and the first shielding ring to be communicated with the testing cavity, and the liquid state testing hole sequentially penetrates through the side wall of the cavity barrel, the observation space at the rear end of the cavity barrel, the third insulating block and the second shielding ring to be communicated with the testing cavity; the two thermocouples are respectively inserted into the gas state test hole and the liquid state test hole in a penetrating way, and test probes of the two thermocouples extend into the test cavity; one sides of the two thermocouples, which are close to the cavity barrel, are respectively provided with a pressure transmitter;
the top and the bottom of the front end in the cavity barrel are respectively provided with a first through hole and a second through hole, the first through hole is opposite to the gas-state testing hole, the first through hole is formed in the third insulating block and the first shielding ring, the second through hole is opposite to the liquid-state testing hole, the second through hole is formed in the third insulating block and the second shielding ring, and the first through hole and the second through hole can enable the testing cavity to be communicated with the observation space at the front end;
the top and the bottom of chamber bucket still are provided with air transfer pipe and liquid transfer pipe respectively, air transfer pipe and front end survey the space intercommunication, liquid transfer pipe and rear end survey the space intercommunication.
2. The insulating liquid, gas and gas-liquid mixed state dielectric property test chamber according to claim 1, wherein: the cavity barrel is characterized in that an observation port communicated with the observation space is further formed in the side wall of the front end of the cavity barrel, an observation window with liquid level scales is arranged on the observation port, and the observation window is fixed on the cavity barrel through an observation window sealing frame.
3. The insulating liquid, gas and gas-liquid mixed state dielectric property test chamber according to claim 1, wherein: set up and be in on the chamber bucket lateral wall gaseous state test hole with all install a temperature, pressure measurement integrated valve on the liquid state test hole, the test probe end of thermocouple passes temperature, pressure measurement integrated valve stretch into the test intracavity, pressure transmitter install in on the temperature, pressure measurement integrated valve, through temperature, pressure measurement integrated valve measure hydraulic pressure and atmospheric pressure in the test intracavity.
4. The insulating liquid, gas and gas-liquid mixed state dielectric property test chamber according to claim 3, wherein: the thermocouple is further sleeved with a heat insulation pipe on the rod body extending out of the other end of the temperature and pressure measurement integrated valve, one end of the heat insulation pipe extends into the temperature and pressure measurement integrated valve, the other end of the heat insulation pipe is sealed and fixed by a thermocouple sealing block, and the heat insulation pipe and the sealing block are made of heat insulation materials.
5. The insulating liquid, gas and gas-liquid mixed state dielectric property test chamber according to claim 1, wherein: the top of the second insulating block is also provided with an insulating end which penetrates through the cavity cover and extends out of the cavity barrel, the high-voltage electrode leading-out terminal is arranged at the top of the high-voltage electrode, and the high-voltage electrode leading-out terminal penetrates through the insulating end and extends out of the cavity barrel.
6. The insulating liquid, gas and gas-liquid mixed state dielectric property test chamber according to claim 1, wherein: the testing electrode comprises a cavity cover, a testing electrode leading-out terminal and a third insulating block, wherein the top end of the testing electrode is transversely provided with a connecting lug, the bottom end of the testing electrode leading-out terminal is inserted into the connecting lug, an insulating flange is installed in the cavity cover, a through hole opposite to the connecting lug is formed in the insulating flange, and the top end of the testing electrode leading-out terminal penetrates through the third insulating block and the insulating flange and stretches out of the cavity barrel.
7. The insulating liquid, gas and gas-liquid mixed state dielectric property test chamber according to claim 6, wherein: the cavity cover is provided with a mounting groove for mounting the insulating flange, an oil seal is arranged between the bottom of the insulating flange and the bottom of the mounting groove, the top of the insulating flange is fixed through a gland flange, and the top leading-out end of the insulating flange extends out of the gland flange.
8. The insulating liquid, gas and gas-liquid mixed state dielectric property test chamber according to claim 1, wherein: and the top of the cavity cover is also provided with a grounded shielding electrode leading-out terminal.
9. The insulating liquid, gas and gas-liquid mixed state dielectric property test chamber according to claim 1, wherein: the bottom of the cavity barrel is also provided with a sealing disc for sealing the sealing groove block, the middle parts of the fourth insulating block, the sealing groove block and the sealing disc are provided with through holes, the heating source is a heating rod, the heating rod penetrates through the through holes and is inserted into the high-voltage electrode, and the heating rod introduces power through a heating rod leading-out wire at the bottom; the heating rod is also provided with a temperature feedback device.
10. The insulating liquid, gas and gas-liquid mixed state dielectric property test chamber according to claim 9, wherein: the supporting frame comprises a supporting seat and a supporting leg arranged at the bottom of the supporting seat, a fixing groove is formed in the top of the supporting seat, a through hole is formed in the bottom of the fixing groove, the bottom of the cavity barrel is fixed in the fixing groove, and the through holes in the middle of the fourth insulating block, the sealing groove block and the sealing disc and the through hole in the supporting seat are concentric holes;
o-shaped sealing rings are arranged between the top end face of the second insulating block and the bottom end face of the cavity cover, between the bottom end face of the second insulating block and the top end face of the high-voltage electrode, between the top end face of the cavity barrel and the bottom end face of the cavity cover, between the top end face of the fourth insulating block and the bottom end face of the high-voltage electrode, between the bottom end face of the fourth insulating block and the top end face of the sealing groove block, and between the bottom of the sealing groove block and the cavity barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451469.1A CN109581159B (en) | 2018-11-30 | 2018-11-30 | Insulating liquid state, gaseous state and gas-liquid mixture state dielectric property test chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451469.1A CN109581159B (en) | 2018-11-30 | 2018-11-30 | Insulating liquid state, gaseous state and gas-liquid mixture state dielectric property test chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109581159A CN109581159A (en) | 2019-04-05 |
| CN109581159B true CN109581159B (en) | 2020-01-21 |
Family
ID=65925577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811451469.1A Active CN109581159B (en) | 2018-11-30 | 2018-11-30 | Insulating liquid state, gaseous state and gas-liquid mixture state dielectric property test chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109581159B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110933780B (en) * | 2019-11-19 | 2022-01-11 | 中国科学院电工研究所 | Linear heat source safety assessment experiment platform |
| CN111044557A (en) * | 2019-11-19 | 2020-04-21 | 中国科学院电工研究所 | Superconducting cable heat source safety assessment experiment platform |
| CN111190082A (en) * | 2020-01-09 | 2020-05-22 | 华北电力大学 | Liquid steam dielectric strength testing arrangement |
| CN111190081A (en) * | 2020-01-09 | 2020-05-22 | 华北电力大学 | Liquid vapor dielectric strength test system and method |
| CN113933657A (en) * | 2020-07-24 | 2022-01-14 | 中国科学院电工研究所 | Dielectric insulation performance testing device |
| CN112327110A (en) * | 2020-10-19 | 2021-02-05 | 中国科学院电工研究所 | Wide-temperature-area liquid medium environment test device based on refrigerator conduction cooling |
| CN112630606A (en) * | 2020-11-16 | 2021-04-09 | 安徽省宁国天成电工有限公司 | Heating pipe insulation detection tank |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078692A (en) * | 2007-07-03 | 2007-11-28 | 四川大学 | Liquid or solid powder substance dielectric coefficient test device, and the test and calculation method |
| CN104237648A (en) * | 2013-06-24 | 2014-12-24 | 电子科技大学 | Novel method for testing microwave complex permittivity of high-loss liquid and powder materials |
| CN204479658U (en) * | 2015-03-13 | 2015-07-15 | 吉林大学 | A kind of portable fluid dielectric constant measurement pen |
| CN204515024U (en) * | 2015-01-19 | 2015-07-29 | 丹东丹联仪表检测技术研究有限公司 | A kind of hand-held gas, liquid dielectric tester |
| CN107860981A (en) * | 2017-10-20 | 2018-03-30 | 金华职业技术学院 | The method of testing of fluid sample dielectric property under a kind of condition of high voltage |
| CN108680839A (en) * | 2018-05-29 | 2018-10-19 | 电子科技大学 | Coaxial resonant cavity complex dielectric permittivity high-temperature test system and method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100538374C (en) * | 2007-12-07 | 2009-09-09 | 中国计量科学研究院 | A kind of device of working sample dielectric property and assay method thereof and application |
| CN101308189B (en) * | 2008-06-24 | 2011-04-13 | 中国科学院电工研究所 | Medium insulation properties measuring apparatus for gas-liquid two-phase fluid state |
| WO2014048799A2 (en) * | 2012-09-25 | 2014-04-03 | Sony Corporation | Sensor arrangement for non-invasive measurements of dielectric permittivity of liquids |
| CN104101820B (en) * | 2014-07-17 | 2016-09-21 | 国网上海市电力公司 | A kind of transformer oil/Aging of Oil-paper Insulation in Oil experimental provision and experimental technique |
| CN104407233B (en) * | 2014-12-02 | 2017-10-27 | 中国科学院广州能源研究所 | Hydrate dielectric property test device in a kind of deposit |
| CN206740864U (en) * | 2017-05-24 | 2017-12-12 | 西安交通大学 | A kind of insulating materials time-frequency domain dielectric spectra measuring electrode system |
| CN107390033B (en) * | 2017-08-17 | 2023-04-18 | 南方电网科学研究院有限责任公司 | Composite insulating material frequency domain dielectric spectrum testing device |
-
2018
- 2018-11-30 CN CN201811451469.1A patent/CN109581159B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078692A (en) * | 2007-07-03 | 2007-11-28 | 四川大学 | Liquid or solid powder substance dielectric coefficient test device, and the test and calculation method |
| CN104237648A (en) * | 2013-06-24 | 2014-12-24 | 电子科技大学 | Novel method for testing microwave complex permittivity of high-loss liquid and powder materials |
| CN204515024U (en) * | 2015-01-19 | 2015-07-29 | 丹东丹联仪表检测技术研究有限公司 | A kind of hand-held gas, liquid dielectric tester |
| CN204479658U (en) * | 2015-03-13 | 2015-07-15 | 吉林大学 | A kind of portable fluid dielectric constant measurement pen |
| CN107860981A (en) * | 2017-10-20 | 2018-03-30 | 金华职业技术学院 | The method of testing of fluid sample dielectric property under a kind of condition of high voltage |
| CN108680839A (en) * | 2018-05-29 | 2018-10-19 | 电子科技大学 | Coaxial resonant cavity complex dielectric permittivity high-temperature test system and method |
Non-Patent Citations (2)
| Title |
|---|
| 《Electrophysical characteristics and testing of dielectric liquids》;R.G. Romanets等;《IEEE》;20020806;全文 * |
| 《液体介电常数测试方法研究与测试盒开发》;钱文虎等;《苏州科技学院学报（工程技术版）》;20130630;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109581159A (en) | 2019-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109581159B (en) | Insulating liquid state, gaseous state and gas-liquid mixture state dielectric property test chamber | |
| Gregory et al. | Traceable measurements of the static permittivity of dielectric reference liquids over the temperature range 5–50 C | |
| US7135870B2 (en) | Device for determining the composition of a fluid mixture | |
| CN108519545A (en) | It is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision and method | |
| KR100721227B1 (en) | Apparatus for measuring or estimating a voltage on wafer, and system for monitoring a dc bias voltage on a substrate and methode thereof | |
| US7403019B2 (en) | Apparatus and method of water absorption test for generator stator winding insulator using cross capacitance | |
| KR20110039250A (en) | Plasma-facing probe arrangement including vacuum gap for use in a plasma processing chamber | |
| JP2023549871A (en) | Mounting equipment for semiconductor heat treatment equipment and semiconductor heat treatment equipment | |
| EP3004832A1 (en) | Method and device for determining an average parameter of a fluid in a closable container | |
| US2849518A (en) | Temperature indicator | |
| Ramires et al. | The thermal conductivity of toluene and water | |
| CN109541408B (en) | Insulating liquid insulation characteristic test chamber of low boiling point | |
| Fernández et al. | Measurements of the relative permittivity of liquid water at frequencies in the range of 0.1 to 10 kHz and at temperatures between 273.1 and 373.2 K at ambient pressure | |
| CN208314123U (en) | It is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision | |
| JP5187828B2 (en) | Voltage probe | |
| CN109541019B (en) | Insulating medium breakdown strength experimental device under low-temperature and high-pressure environment | |
| US3200312A (en) | Capacitance probe for fluids | |
| Campos et al. | Investigation of thermal effects in coaxial probe method and dielectric characterization of glycerol up to 140 C | |
| Tanaka et al. | Anomalous microwave radiation at cyclotron resonance in partially ionized plasmas | |
| US2939070A (en) | Conductivity cell | |
| CN217005974U (en) | Non-contact power transformer oil level measuring device | |
| CN111226120B (en) | Detector | |
| US2805371A (en) | Capacitance sensing element | |
| CN212867542U (en) | Resistivity logging instrument | |
| US3300737A (en) | Coaxial electrical line attenuator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |