CN116642926A - Insulating oil moisture detection device - Google Patents
Insulating oil moisture detection device Download PDFInfo
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- CN116642926A CN116642926A CN202310926895.0A CN202310926895A CN116642926A CN 116642926 A CN116642926 A CN 116642926A CN 202310926895 A CN202310926895 A CN 202310926895A CN 116642926 A CN116642926 A CN 116642926A
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- sampling tube
- sampler
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- storage cavity
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- 238000001514 detection method Methods 0.000 title claims abstract description 111
- 238000005070 sampling Methods 0.000 claims abstract description 122
- 239000013078 crystal Substances 0.000 claims abstract description 27
- 230000010355 oscillation Effects 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 238000009413 insulation Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 20
- 239000003921 oil Substances 0.000 description 76
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 230000003749 cleanliness Effects 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000010735 electrical insulating oil Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
Abstract
The application relates to an insulating oil-water separation detection device, which comprises a device body, an oscillation frequency counter, a detection cavity, a crystal oscillator, a sampler and a control circuit, wherein the sampler is detachably connected with the device body and is internally provided with at least two non-communicated sample storage cavities, and a heating wire and a temperature sensor are arranged in one sample storage cavity; the bottom of the sampler is provided with a temporary storage cavity which is communicated with the sample storage cavity, an on-off valve is arranged at the communicating part, the bottom end of the sampler is also provided with a sampling tube which is communicated with the temporary storage cavity, one end of the sampling tube, which is far away from the temporary storage cavity, is used for being communicated with the detection cavity, and the sampler is also provided with a pressure regulating mechanism for pressurizing the sample storage cavity; the side wall of the sampler is provided with a recoil nozzle joint communicated with the temporary storage cavity, the recoil nozzle joint is communicated with an external compressed air source, and the recoil nozzle joint is provided with a one-way valve only for medium to circulate from outside to the temporary storage cavity. The application has the effect of detecting the water content of insulating oil in different batches with high efficiency and high detection accuracy.
Description
Technical Field
The application relates to the technical field of oil-water detection equipment, in particular to an insulating oil-water separation detection device.
Background
Insulating oil is filled in the oil immersed transformer, and the insulating oil can play roles in insulation, heat dissipation and arc extinction. The moisture source of the transformer is mainly that moisture in the atmosphere invades into the oil from outside the equipment, and moisture adsorbed by cellulose of the insulating material permeates into the oil, or moisture generated by aging decomposition of cellulose enters into the oil. In the operation of the transformer, only a trace amount of moisture exists in the insulating oil, which causes great harm to the electrical property and the physicochemical property of the insulating medium. The moisture can lead to reduced breakdown voltage of the insulating oil, increased dielectric loss factors and accelerated aging of the insulating oil, and the more important effect is that the paper insulation is permanently damaged, so that the operation reliability and service life of the oil-filled electrical equipment are reduced, and even insulation accidents are caused. Therefore, the periodic measurement of moisture in insulating oil is of great importance.
The related art Chinese patent with publication number CN109060953A proposes an electric insulation oil-water content charged detection device, comprising: an oscillation frequency counter, an oil sample constant temperature detection cavity and a crystal oscillator; the crystal oscillator is coated with a hydrophilic coating on the surface, is arranged in the oil sample constant temperature detection cavity, and is used for generating oscillation frequency and transmitting the oscillation frequency to an oscillation frequency counter; the oil sample constant temperature detection cavity is internally provided with a crystal oscillator for containing electric insulating oil; and the oscillation frequency counter is connected with the crystal oscillator and used for recording the oscillation frequency generated by the crystal oscillator and acquiring the content of the electric insulation oil and water according to the change of the oscillation frequency generated by the crystal oscillator. The application can rapidly, conveniently and accurately quantitatively detect the moisture content in the electrical insulating oil under the condition of taking the oil sample on site of the electrical equipment.
The related art in the above has the following drawbacks: when carrying out the moisture content to insulating oil and detecting, generally not only need detect the insulating oil of normal atmospheric temperature state, also need detect insulating oil heating to electrical equipment operating temperature simultaneously to ensure the accurate detection effect to insulating oil, and need sample repeatedly and clean detecting the chamber when the test generally, undoubtedly lead to detection efficiency greatly reduced, influence electrical equipment's quality identification.
Disclosure of Invention
In order to solve the problem that the detection device is low in efficiency when detecting insulating oil at normal temperature and working temperature, the application provides an insulating oil moisture detection device.
The application provides an insulating oil-water separation detection device which adopts the following technical scheme:
the insulating oil-water separation detection device comprises a device body, an oscillation frequency counter, a detection cavity and a crystal oscillator, wherein the oscillation frequency counter, the detection cavity and the crystal oscillator are arranged in the detection cavity, the crystal oscillator is coated with a hydrophilic coating and used for generating oscillation frequency and transmitting the oscillation frequency to the oscillation frequency counter, the sampler is detachably connected with the device body, at least two sample storage cavities which are not communicated are arranged in the sampler, and a heating wire and a temperature sensor are arranged in one sample storage cavity;
the bottom of the sampler is provided with a temporary storage cavity which is communicated with the sample storage cavity, an opening and closing valve is arranged at the communicating part, the bottom end of the sampler is also provided with a sampling tube which is communicated with the temporary storage cavity, one end of the sampling tube, which is far away from the temporary storage cavity, is used for being communicated with the detection cavity, and the sampler is also provided with a pressure regulating mechanism which is used for pressurizing the sample storage cavity;
the side wall of the sampler is provided with a recoil nozzle joint communicated with the temporary storage cavity, the recoil nozzle joint is used for being communicated with an external compressed air source, and the recoil nozzle joint is provided with a one-way valve only for medium to circulate from the outside to the temporary storage cavity.
Furthermore, a heat insulation plate is arranged between the cavity wall of the sample storage cavity provided with the electric heating wire and the cavity walls of the other sample storage cavities.
Further, a long hole for sliding the sampling tube is formed in the bottom end of the sampler, a sealing cover with the size larger than that of the long hole is fixedly connected to one end, extending into the temporary storage cavity, of the sampling tube, an elastic piece is connected between the sampling tube and the sampler, and a plurality of through holes communicated with the hollow part of the sampling tube are formed in the periphery of one end, close to the sealing cover, of the sampling tube;
when the elastic piece is in an initial state, the through hole is embedded into the long hole;
the device body is provided with a propping platform at the opening of the detection cavity, and when the sampler is connected with the device body, the sampling tube moves upwards under the propping action of the propping platform.
Still further, a plurality of strip holes have been seted up to the one end week side that the sampling tube kept away from the closing cap, the sampling tube with the sampler moves with and is connected, support the platform with be equipped with between the sampling tube and be used for realizing the sampling tube follows when the sampler rotates makes the sampling tube is in the regulation structure that goes up and down in the sampler.
Furthermore, the adjusting structure comprises a plurality of bulges fixedly connected to the propping platform and a plurality of shifting blocks fixedly connected to the periphery of the sampling tube, the shifting blocks are arranged in one-to-one correspondence with the bulges, and the protruding peaks are also connected with guide slopes fixedly connected to the propping platform; the strip hole is arranged on one side of the shifting block, which is away from the sealing cover.
Furthermore, a push rod is fixedly connected to the inner bottom wall of the detection cavity, a rubber plug is arranged at the top of the push rod, and the crystal oscillator is arranged on one side of the push rod; when the sampling tube is connected with the sampler, the rubber plug is abutted against the bottom opening of the sampling tube; when the sampling tube rotates to the position that the shifting block is abutted against the bulge, the rubber plug breaks away from blocking the sampling tube.
Furthermore, the upper end face of the rubber plug is provided with a conical surface, and the bottom end of the sampling tube is provided with a flaring shape matched with the conical surface.
Further, an oil drain pipe communicated with the detection cavity is arranged on the device body, a valve is arranged on the oil drain pipe, and a guide inclined plane for guiding residual oil into the oil drain pipe is arranged in the detection cavity.
Furthermore, the sampling tube is also detachably connected with a sampling needle, and the sampling needle seals a plurality of strip holes after the upper part of the sampling needle is connected with the bottom end of the sampling tube in a plugging manner.
Still further, set up on the device body with the caulking groove of sampler bottom grafting adaptation, set up a plurality of arc grooves on the caulking groove perisporium, set up on the device body a plurality of edges caulking groove depth direction sets up and with a plurality of the slot that the arc groove one-to-one set up, the rigid coupling has a plurality of with a plurality of on the sampler perisporium the inserted block that the slot one-to-one set up, the inserted block with the slot with the equal grafting adaptation of arc groove, the arc groove length is greater than protruding with the extension length of direction slope.
In summary, the beneficial technical effects of the application are as follows:
1. when the insulating oil is detected, after the sampler is mounted on the device body, a valve on the oil discharge pipe is opened, the recoil nozzle joint is communicated with the compressed air source, and by means of the kinetic energy of high-pressure air flow, on one hand, the insulating oil reserved in the temporary storage cavity in the sampling stage can be discharged into the detection cavity, so that the insulating oil washes the cavity wall of the detection cavity, and the influence on the detection result caused by the fact that the insulating oil sampled in the previous batch remains in the detection cavity after detection can be obviously reduced; on the other hand, after the insulating oil is washed, compressed air which is introduced into the detection cavity from the temporary storage cavity can carry out air washing on the inner wall of the detection cavity and the crystal oscillator surface, so that the cleanliness in the detection cavity is improved, and the influence on the detection accuracy of the detection device is reduced as much as possible; after the arrangement is adopted, the rapid detection effect of the same oil product at different temperatures can be achieved; meanwhile, different oil products can be continuously detected, and the recoil nozzle joint is communicated with a compressed air source only when the oil is changed in the sampling process so as to clean the temporary storage cavity; after the number of the sample storage cavities is increased, the application scene of the application in actual detection can be further expanded;
2. when the compressed air introduced through the recoil nozzle joint cleans, the sampling tube is rotated, the guide slope pushes the sampling tube to move upwards or downwards through the shifting block, the penetration degree of the strip holes in the detection cavity is changed, the compressed air introduced through the recoil nozzle joint can be sprayed out from the bottom end opening of the sampling tube, the compressed air can be sprayed out through a plurality of strip holes, the inner peripheral wall of the detection cavity can be flushed by the air flow sprayed out through the strip holes, and the sweeping effect of the air flow sprayed out from the strip holes on the inner peripheral wall of the detection cavity can be realized along with the lifting of the sampling tube, so that the cleaning effect of the cavity wall of the detection cavity is greatly improved.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of an embodiment of the present application;
FIG. 2 is an enlarged schematic view of a portion A of FIG. 1;
FIG. 3 is a schematic view of an embodiment of the present application primarily for use in illustrating a projection and guide ramp;
fig. 4 is a schematic view of the structure of the rubber stopper according to the embodiment of the present application when the groove is provided.
Reference numerals illustrate: 1. a device body; 11. a detection chamber; 111. an oil drain pipe; 112. a valve; 113. a guide slope; 12. a crystal oscillator; 13. abutment; 14. a connection hole;
2. a sampler; 21. a sample storage cavity; 22. a heating wire; 23. a temperature sensor; 24. a temporary storage cavity; 25. opening and closing the valve; 26. a backflushing nozzle joint; 27. a heat insulating plate;
3. a sampling tube; 31. a conducting bar; 32. a guide groove;
41. a long hole; 42. a cover; 43. an elastic member; 44. a through hole; 45. a strip hole;
51. a protrusion; 52. a shifting block; 53. a guiding slope;
61. a push rod; 62. a rubber stopper; 63. a ring groove;
81. a caulking groove; 82. an arc groove; 83. a slot; 84. inserting blocks; 85. a rubber ring.
Description of the embodiments
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment of the application discloses an insulating oil-water separation detection device. Referring to fig. 1 and 2, an insulating oil moisture detecting device includes a device body 1, an oscillation frequency counter provided in the device body 1, a detecting chamber 11, and a crystal oscillator 12 provided in the detecting chamber 11, the crystal oscillator 12 being coated with a hydrophilic coating and used for generating an oscillation frequency and transmitting to the oscillation frequency counter; the bottom of the device body 1 is provided with an oil drain pipe 111 communicated with the detection cavity 11, a valve 112 is arranged on the oil drain pipe 111, and a guiding inclined plane 113 for guiding residual oil into the oil drain pipe 111 is arranged in the detection cavity 11.
The sampler 2 is detachably connected with the device body 1, at least two non-communicated sample storage cavities 21 are arranged in the sampler 2, a heating wire 22 and a temperature sensor 23 are arranged in one sample storage cavity 21, a heat insulation plate 27 is arranged between the cavity wall of the sample storage cavity 21 provided with the electric heating wire 22 and the cavity walls of other sample storage cavities 21, and the heat insulation plate 27 is particularly arranged around the cavity wall of the sample storage cavity 21; in the present embodiment, two sample storage chambers 21 are provided, and a temperature sensor 23 is connected with the heating wire 22 in a control manner, so that the heating wire 22 is controlled to stop heating when the insulating oil in the sample storage chamber 21 is heated to a set temperature, thereby ensuring the constant temperature effect in the sample storage chamber 21.
Meanwhile, referring to fig. 1 and 2, a temporary storage cavity 24 is arranged at the bottom of the sampler 2, the temporary storage cavity 24 is communicated with a plurality of sample storage cavities 21, and an on-off valve 25 is arranged at a communicating part of the sample storage cavities 21 and the temporary storage cavity 24, wherein the on-off valve 25 can be a mechanical valve with a control end located outside the sampler 2 or an electrically controllable electromagnetic valve, and the on-off valve 25 is set as the electromagnetic valve in the embodiment. The bottom end of the sampler 2 is also provided with a sampling tube 3 communicated with the temporary storage cavity 24, one end of the sampling tube 3 away from the temporary storage cavity 24 is used for being communicated with the detection cavity 11, and the sampler 2 is also provided with a pressure regulating mechanism (not shown in the figure) for pressurizing the sample storage cavity 21; the pressure regulating mechanism can be an air tap communicated with an external air source or a piston structure, and in the embodiment, the pressure regulating mechanism is arranged into the piston structure, and one sample storage cavity 21 corresponds to one piston structure. In addition, the sampling tube 3 is detachably connected with a sampling needle (not shown).
On the other hand, referring to fig. 1, the side wall of the sampler 2 is provided with a back flushing nozzle joint 26 communicated with the temporary storage cavity 24, the back flushing nozzle joint 26 is used for communicating with an external compressed air source, and a one-way valve for only allowing medium to flow into the temporary storage cavity 24 from the outside is arranged on the back flushing nozzle joint 26.
After the arrangement, when the water content of the insulating oil in the electrical equipment is detected, the sampler 2 can be moved out from the device body 1, then the sampling needle is arranged on the sampling tube 3, the sampling needle extends into the electrical equipment, the two on-off valves 25 are opened simultaneously, the insulating oil in the electrical equipment is sucked through the piston structure, the sucked insulating oil firstly enters the temporary storage cavity 24 and is respectively sucked into the two sample storage cavities 21 to be stored; before the sampler 2 is mounted to the apparatus body 1, the insulating oil in one of the sample storage chambers 21 may be heated by the heating wire 22 until the oil temperature detected by the temperature sensor 23 reaches a set temperature, i.e., the heating is stopped.
And then the sampler 2 is arranged on the device body 1, the valve 112 on the oil discharge pipe 111 is opened, the recoil nozzle joint 26 is communicated with a compressed air source, and by means of the kinetic energy of high-pressure air flow, on one hand, insulating oil reserved in the temporary storage cavity 24 in the sampling stage can be discharged into the detection cavity 11, so that the insulating oil washes the cavity wall of the detection cavity 11, particularly the crystal oscillator 12, and therefore the influence of the insulating oil in the previous batch on the detection result caused by the fact that the insulating oil in the detection cavity 11 remains after detection can be obviously reduced. On the other hand, after the insulating oil is washed, compressed air introduced into the detection cavity 11 from the temporary storage cavity 24 can perform air washing on the inner wall of the detection cavity 11 and the surface of the crystal oscillator 12, so that the cleanliness in the detection cavity 11 is improved, and the influence on the detection accuracy of the detection device is reduced as much as possible.
In the formal detection, the valve 112 on the oil drain pipe 111 is closed, then the on-off valve 25 corresponding to the sample storage cavity 21 of the insulating oil at normal temperature is opened, the pressure in the sample storage cavity 21 is increased through the pressure regulating mechanism, so that the insulating oil in the sample storage cavity 21 flows into the detection cavity 11 through the temporary storage cavity 24 until the insulating oil completely passes through the crystal oscillator 12, the on-off valve 25 corresponding to the sample storage cavity 21 is closed, and at the moment, the crystal oscillator 12 can acquire the content of the electric insulating oil according to the change of the oscillation frequency generated by the crystal oscillator 12 during operation.
When the moisture of the insulating oil at the working temperature is detected, the recoil nozzle joint 26 is communicated with a compressed air source according to the steps so as to clean the temporary storage cavity 24, the detection cavity 11 and the crystal oscillator 12; then, the on-off valve 25 corresponding to the sample storage cavity 21 provided with the heating wire 22 is opened, and the high-temperature insulating oil in the sample storage cavity 21 is circulated into the detection cavity 11 through the temporary storage cavity 24 by the pressure regulating mechanism, so as to carry out detection.
Therefore, after the arrangement is adopted, the rapid detection effect of the same oil product at different temperatures can be achieved; meanwhile, the continuous detection can be carried out on different oil products, and the recoil nozzle joint 26 is communicated with a compressed air source only when the oil is changed in the sampling process so as to clean the temporary storage cavity 24; and after the number of the sample storage cavities 21 is increased, the application scene of the application in actual detection can be further expanded.
Specifically, referring to fig. 1 and 2, it is further configured that a long hole 41 for sliding the sampling tube 3 is provided at the bottom end of the sampler 2, a cover 42 with a size larger than the aperture of the long hole 41 is fixedly connected to one end of the sampling tube 3 extending into the temporary storage cavity 24, an elastic member 43 is connected between the sampling tube 3 and the sampler 2, and a plurality of through holes 44 communicated with the hollow portion of the sampling tube 3 are provided at the periphery of one end of the sampling tube 3 close to the cover 42; when the elastic member 43 is in the initial state, the through hole 44 is fitted into the long hole 41.
Referring to fig. 1 and 3, the device body 1 is provided with a support 13 at the opening of the detection chamber 11, a connecting hole 14 for inserting the lower part of the sampling tube 3 is provided in the middle of the support 13, and when the sampler 2 is connected with the device body 1, the sampling tube 3 moves up under the support action of the support 13. Specifically, a plurality of strip holes 45 are formed in the periphery of one end, far away from the sealing cover 42, of the sampling tube 3, the plurality of strip holes 45 are arranged at intervals on the axis of the sampling tube 3, the strip holes 45 can be horizontally arranged or can be connected with the sampling tube 3 and the sampling device 2 in a same way, specifically, a guide strip 31 arranged along the length direction of the outer wall of the sampling tube 3 is fixedly connected with the outer wall of the sampling tube 3, and a guide groove 32 which is in sliding fit with the guide strip 31 is formed in the wall of the long hole 41; and an adjusting structure for enabling the sampling tube 3 to lift in the sampler 2 when the sampling tube 3 rotates along with the sampler 2 is arranged between the abutment 13 and the sampling tube 3.
Referring to fig. 1 and 3, the adjusting structure includes a plurality of protrusions 51 fixedly connected to the abutment 13 and a plurality of shifting blocks 52 fixedly connected to the periphery of the sampling tube 3, the plurality of shifting blocks 52 are arranged in one-to-one correspondence with the plurality of protrusions 51 and are distributed in an equidistant circumferential array on the axis of the sampling tube 3, and the peaks of the protrusions 51 are also connected with guide slopes 53 fixedly connected to the abutment 13; in the actual arrangement, the guide slopes 53 may be provided only on one side of the boss 51, or the guide slopes 53 may be provided on both sides of the boss 51, and in this embodiment, the guide slopes 53 are provided on both sides of the boss 51. When the dial 52 on the peripheral side of the sampling tube 3 abuts against the peak of the boss 51, the bar hole 45 is fitted into the connecting hole 14 in the middle of the abutment 13. The strip hole 45 is arranged on one side of the shifting block 52, which is away from the sealing cover 42, so as to be communicated with the detection cavity 11, the elastic piece 43 is arranged between the shifting block 52 and the bottom wall of the sampler 2 and is arranged as a spring sleeved on the periphery of the sampling tube 3, and the connection mode of the sampler 2 and the device body 1 is rotary clamping.
After setting up like this, when sampler 2 is installed to device body 1 by rotatory joint, the shifting block 52 moves up under the pushing action of supporting platform 13, and the through-hole 44 on the sampling tube 3 communicates with the cavity of keeping in 24, and the cavity of keeping in 24 communicates with detecting cavity 11 through sampling tube 3 this moment, and the insulating oil in the cavity of keeping in 24 can flow into detecting cavity 11 under pressure regulating mechanism's effect. In the process of introducing compressed air through the recoil nozzle joint 26 to clean the detection cavity 11, the sampler 2 can be reciprocally rotated under the condition that the sampler 2 is kept not to be separated from the device body 1, so that the shifting block 52 on the sampling tube 3 reciprocally slides between the guide slope 53 and the peak of the bulge 51, and thus, the reciprocal lifting of the sampling tube 3 in the long hole 41 can be realized, and the lower end of the sampling tube 3 can have the following forms:
first, when the shifting block 52 on the sampling tube 3 is abutted against the peak of the bulge 51, the strip hole 45 on the sampling tube 3 is embedded into the connecting hole 14, and at this time, the compressed air introduced through the recoil nozzle joint 26 is sprayed out only through the bottom end opening of the sampling tube 3, so that the cavity wall of the detection cavity 11 below the bottom end of the sampling tube 3 can be flushed strongly.
Secondly, when the shifting block 52 on the sampling tube 3 slides on the guiding slope 53, the strip holes 45 on the sampling tube 3 are exposed in the detection cavity 11, and along with the rotation of the sampling tube 3, the guiding slope 53 pushes the sampling tube 3 to move upwards or downwards, at this time, the penetration degree of the strip holes 45 in the detection cavity 11 changes, compressed air introduced through the recoil nozzle joint 26 can be sprayed out from the bottom end opening of the sampling tube 3, and also can be sprayed out through a plurality of strip holes 45, air flow sprayed out through the strip holes 45 can flush the inner peripheral wall of the detection cavity 11, and along with the lifting of the sampling tube 3, the sweeping effect of the air flow sprayed out by the strip holes 45 on the inner peripheral wall of the detection cavity 11 can be realized, so that the cleaning effect on the cavity wall of the detection cavity 11 is greatly improved.
In order to further improve the cleaning effect of the plurality of strip holes 45 on the cavity wall of the detection cavity 11, referring to fig. 1, a push rod 61 is fixedly connected to the inner bottom of the detection cavity 11, a rubber plug 62 is mounted on the top of the push rod 61, and the crystal oscillator 12 is mounted on one side of the push rod 61; when the sampling tube 3 is connected with the sampler 2, the rubber stopper 62 is inserted into the sampling tube 3; when the sampling tube 3 rotates until the shifting block 52 is abutted against the bulge 51, the rubber plug 62 breaks away from the blocking of the sampling tube 3; meanwhile, the upper end surface of the rubber plug 62 is set to be a conical surface, and the bottom end of the sampling tube 3 is set to be a flaring shape matched with the conical surface.
After the arrangement, when the shifting block 52 of the sampling tube 3 slides on the abutment 13 or the guide slope 53, the opening at the bottom of the sampling tube 3 is blocked or slightly blocked, so that the air flow in the sampling tube 3 is ejected from the strip holes 45 at the periphery side of the sampling tube 3 as much as possible, and the cleaning effect of the strip holes 45 on the periphery wall of the detection cavity 11 is ensured. In the process, a fan-shaped air outlet can be formed in a gap between the end part of the sampling tube 3 and the conical surface of the rubber plug 62, and a certain cleaning effect on the inner wall of the detection cavity 11 can be realized.
In another possible embodiment, referring to fig. 4, a ring groove 63 adapted to the bottom end of the sampling tube 3 in a plugging manner may be further formed on the top of the rubber plug 62, and the bottom end of the sampling tube 3 is always embedded in the ring groove 63 in the process of sliding the dial 52 on the guiding slope 53, so as to achieve the effect of always sealing the bottom end of the sampling tube 3 in this state.
In other possible embodiments, multiple groups of strip holes 45 may be disposed along the axial direction of the sampling tube 3, and the adjacent two groups of strip holes 45 are disposed in a staggered manner along the axial direction of the sampling tube 3, so as to further optimize the width of the strip Kong Qingsao.
And when specifically setting up, it should also be noted that, after the sampling needle upper portion is spliced with sampling tube 3 bottom, the sampling needle shutoff a plurality of strip holes 45 to ensure pressure regulating mechanism's suction effect.
The rotational engagement between the sampler 2 and the apparatus body 1 is as follows: the device body 1 is provided with a caulking groove 81 which is in plug-in fit with the bottom end of the sampler 2, the peripheral wall of the caulking groove 81 is provided with a plurality of arc grooves 82, the device body 1 is provided with a plurality of slots 83 which are arranged along the depth direction of the caulking groove 81 and are arranged in one-to-one correspondence with the plurality of arc grooves 82, the peripheral wall of the sampler 2 is fixedly connected with a plurality of plug blocks 84 which are arranged in one-to-one correspondence with the plurality of slots 83, the plug blocks 84 are in plug-in fit with the slots 83 and the arc grooves 82, and the groove length of the arc grooves 82 is larger than the total extension length of the bulges 51 and the guide slopes 53 at two sides of the bulges. Meanwhile, in consideration of the sealing connection effect between the sampler 2 and the apparatus body 1, a rubber ring 85 is further provided at the bottom wall of the caulking groove 81, and when the insert block 84 slides in the arc groove 82, the rubber ring 85 is abutted by the sampler 2.
Thus, the rotary clamping effect between the sampler 2 and the device body 1 can be realized, and the sliding effect of the shifting block 52 on the sampling tube 3 on the protrusion 51 and the guide slope 53 can be ensured after the sampler 2 is clamped with the device body 1.
The implementation principle of the insulating oil moisture detection device provided by the embodiment of the application is as follows: the sampler 2 is arranged on the device body 1, the valve 112 on the oil discharge pipe 111 is opened, the recoil nozzle joint 26 is communicated with a compressed air source, and by means of the kinetic energy of high-pressure air flow, insulating oil reserved in the temporary storage cavity 24 in the sampling stage can be discharged into the detection cavity 11 on the one hand, so that the insulating oil washes the cavity wall of the detection cavity 11, and the influence of the insulating oil in the previous batch on the detection result caused by the fact that the insulating oil in the detection cavity 11 remains after detection can be obviously reduced. On the other hand, after the insulating oil is washed, compressed air introduced into the detection cavity 11 from the temporary storage cavity 24 can perform air washing on the inner wall of the detection cavity 11 and the surface of the crystal oscillator 12, so that the cleanliness in the detection cavity 11 is improved, and the influence on the detection accuracy of the detection device is reduced as much as possible.
After the arrangement is adopted, the rapid detection effect of the same oil product at different temperatures can be achieved; meanwhile, the continuous detection can be carried out on different oil products, and the recoil nozzle joint 26 is communicated with a compressed air source only when the oil is changed in the sampling process so as to clean the temporary storage cavity 24; and after the number of the sample storage cavities 21 is increased, the application scene of the application in actual detection can be further expanded.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (10)
1. The insulation oil-water separation detection device comprises a device body (1), an oscillation frequency counter, a detection cavity (11) and a crystal oscillator (12) arranged in the detection cavity (11), wherein the oscillation frequency counter, the detection cavity (11) and the crystal oscillator (12) are arranged in the device body (1), the surface of the crystal oscillator (12) is coated with a hydrophilic coating and is used for generating oscillation frequency and transmitting the oscillation frequency to the oscillation frequency counter, and the insulation oil-water separation detection device is characterized by further comprising a sampler (2) which is detachably connected with the device body (1), at least two non-communicated sample storage cavities (21) are arranged in the sampler (2), and a heating wire (22) and a temperature sensor (23) are arranged in one sample storage cavity (21);
the bottom of the sampler (2) is provided with a temporary storage cavity (24), the temporary storage cavity (24) is communicated with the sample storage cavity (21), an opening and closing valve (25) is arranged at a communicating part, the bottom end of the sampler (2) is also provided with a sampling tube (3) communicated with the temporary storage cavity (24), one end, far away from the temporary storage cavity (24), of the sampling tube (3) is used for being communicated with the detection cavity (11), and the sampler (2) is also provided with a pressure regulating mechanism for pressurizing the sample storage cavity (21);
the side wall of the sampler (2) is provided with a recoil nozzle joint (26) communicated with the temporary storage cavity (24), the recoil nozzle joint (26) is used for being communicated with an external compressed air source, and the recoil nozzle joint (26) is provided with a one-way valve only for medium to circulate from the outside to the temporary storage cavity (24).
2. An insulating oil-water separation detection device according to claim 1, characterized in that a heat insulation plate (27) is arranged between the cavity wall of the sample storage cavity (21) provided with the electric heating wire (22) and the cavity walls of other sample storage cavities (21).
3. The insulation oil-water separation detection device according to claim 1, wherein a long hole (41) for sliding the sampling tube (3) is formed in the bottom end of the sampler (2), a sealing cover (42) with a size larger than that of the long hole (41) is fixedly connected to one end of the sampling tube (3) extending into the temporary storage cavity (24), an elastic piece (43) is connected between the sampling tube (3) and the sampler (2), and a plurality of through holes (44) communicated with the hollow part of the sampling tube (3) are formed in the periphery of one end, close to the sealing cover (42), of the sampling tube (3);
when the elastic member (43) is in an initial state, the through hole (44) is embedded in the long hole (41);
the device body (1) is provided with a propping platform (13) at the opening of the detection cavity (11), and when the sampler (2) is connected with the device body (1), the sampling tube (3) moves upwards under the propping action of the propping platform (13).
4. An insulating oil-water separation detection device according to claim 3, characterized in that a plurality of strip holes (45) are formed in the periphery of one end of the sampling tube (3) away from the sealing cover (42), the sampling tube (3) is connected with the sampler (2) in a synchronous manner, and an adjusting structure for enabling the sampling tube (3) to lift in the sampler (2) when the sampling tube (3) rotates along with the sampler (2) is arranged between the supporting table (13) and the sampling tube (3).
5. The insulation oil-water separation detection device according to claim 4, wherein the adjusting structure comprises a plurality of protrusions (51) fixedly connected to the supporting table (13) and a plurality of shifting blocks (52) fixedly connected to the periphery of the sampling tube (3), the shifting blocks (52) are arranged in one-to-one correspondence with the protrusions (51), and the peaks of the protrusions (51) are further connected with guide slopes (53) fixedly connected to the supporting table (13); the strip hole (45) is arranged on one side of the shifting block (52) away from the sealing cover (42).
6. The insulating oil-water separation detection device according to claim 5, wherein a push rod (61) is fixedly connected to the inner bottom wall of the detection cavity (11), a rubber plug (62) is arranged at the top of the push rod (61), and the crystal oscillator (12) is arranged at one side of the push rod (61); when the sampling tube (3) is connected with the sampler (2), the rubber plug (62) is abutted against the bottom opening of the sampling tube (3); when the sampling tube (3) rotates until the shifting block (52) is in contact with the protrusion (51), the rubber plug (62) is separated from the blocking of the sampling tube (3).
7. The insulating oil-water separation detection device according to claim 6, wherein the upper end face of the rubber plug (62) is a conical surface, and the bottom end of the sampling tube (3) is a flaring shape matched with the conical surface.
8. An insulating oil-water separation detection device according to claim 1, characterized in that an oil drain pipe (111) communicated with the detection cavity (11) is arranged on the device body (1), a valve (112) is arranged on the oil drain pipe (111), and a guiding inclined plane (113) for guiding residual oil into the oil drain pipe (111) is arranged in the detection cavity (11).
9. The insulation oil-water separation detection device according to claim 4, wherein the sampling tube (3) is further detachably connected with a sampling needle, and the sampling needle seals a plurality of strip holes (45) after the upper part of the sampling needle is connected with the bottom end of the sampling tube (3) in a plugging manner.
10. The insulation oil-water separation detection device according to claim 5, wherein the device body (1) is provided with a caulking groove (81) which is in plug-in fit with the bottom end of the sampler (2), the peripheral wall of the caulking groove (81) is provided with a plurality of arc grooves (82), the device body (1) is provided with a plurality of slots (83) which are arranged along the depth direction of the caulking groove (81) and are arranged in one-to-one correspondence with the arc grooves (82), the peripheral wall of the sampler (2) is fixedly connected with a plurality of plug blocks (84) which are arranged in one-to-one correspondence with the slots (83), the plug blocks (84) are in plug-in fit with the slots (83) and the arc grooves (82), and the groove length of the arc grooves (82) is larger than the extension length of the bulges (51) and the guide slopes (53).
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| CN202310926895.0A CN116642926B (en) | 2023-07-27 | 2023-07-27 | Insulating oil moisture detection device |
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| CN202310926895.0A CN116642926B (en) | 2023-07-27 | 2023-07-27 | Insulating oil moisture detection device |
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