CN216082395U - Real-time measuring device for dissolution rate of coal seam water injection osmotic stick - Google Patents
Real-time measuring device for dissolution rate of coal seam water injection osmotic stick Download PDFInfo
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- CN216082395U CN216082395U CN202123252284.8U CN202123252284U CN216082395U CN 216082395 U CN216082395 U CN 216082395U CN 202123252284 U CN202123252284 U CN 202123252284U CN 216082395 U CN216082395 U CN 216082395U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 238000004090 dissolution Methods 0.000 title claims abstract description 80
- 230000003204 osmotic effect Effects 0.000 title claims abstract description 64
- 238000002347 injection Methods 0.000 title claims abstract description 54
- 239000007924 injection Substances 0.000 title claims abstract description 54
- 239000003245 coal Substances 0.000 title claims abstract description 25
- 239000000523 sample Substances 0.000 claims abstract description 92
- 239000000243 solution Substances 0.000 claims abstract description 46
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 19
- 239000012496 blank sample Substances 0.000 claims abstract description 18
- 238000011897 real-time detection Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000004364 calculation method Methods 0.000 claims abstract description 8
- 238000005070 sampling Methods 0.000 claims description 20
- 239000002351 wastewater Substances 0.000 claims description 11
- 238000002835 absorbance Methods 0.000 claims description 10
- 230000031700 light absorption Effects 0.000 claims description 10
- 230000035515 penetration Effects 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 4
- 239000012466 permeate Substances 0.000 claims description 2
- 230000035699 permeability Effects 0.000 claims 3
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 239000012086 standard solution Substances 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 4
- 239000012085 test solution Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 235000013405 beer Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002357 osmotic agent Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model discloses a real-time determination device for the dissolution rate of a coal seam water injection osmotic stick, which comprises a dissolution device, wherein the osmotic stick is placed in the dissolution device, the dissolution device is respectively communicated with a water injection device and a measurement device, the water injection device can inject water with different pressures into the dissolution device, and the osmotic stick solution in the dissolution device is dissolved by pressure water to form a solution which enters the measurement device; the measuring device comprises a sample cell frame, a blank sample cell, a standard sample cell and a test sample cell are arranged on the sample cell frame, the osmotic rod solution flows through the test sample cell, and the real-time detection device can detect the dissolution rate of the test sample cell in real time and transmit the dissolution rate to the data processing and display device; the data processing and displaying device displays the concentration of the solution and the dissolution rate of the osmotic stick in real time through calculation. The real-time measuring device simulates the field water injection environment, measures the dissolution rate of the osmotic stick in the flowing water state with different pressures, and is simple to operate; the real-time detection of the dissolution rate of the osmotic stick is realized, and the detection precision is higher.
Description
Technical Field
The utility model relates to the technical field of coal seam water injection dustproof and dissolution rate measuring devices, in particular to a real-time measuring device for the dissolution rate of a coal seam water injection penetration rod.
Background
In recent years, with the increasing mechanization level of coal mines, the concentration of underground dust is increased, and the occupational health safety of operators is seriously affected. Coal seam water injection dust reduction is the most active and effective technical measure, but in the practical application process, the water injection effect is poor due to the hydrophobicity of coal and the rapid evaporation of injected water, and in order to solve the problem, domestic scholars propose that a penetration rod is added in the water injection process to improve the penetration and wetting effects of water injection. The osmotic stick is a stick chemical osmotic agent in nature, and has been popularized and applied in a plurality of domestic mines due to the simple filling process and the good wetting effect. The dissolution rate of the osmotic stick is one of the most critical parameters for evaluating the application performance of the osmotic stick, and is directly related to the effective acting time of the osmotic stick in the water injection process.
Through investigation, currently, for the determination of the dissolution rate of the osmotic stick, the osmotic stick is generally put into water, taken out after a certain time, dried and weighed, and the dissolution rate of the osmotic stick is obtained by calculating the mass loss of the osmotic stick.
SUMMERY OF THE UTILITY MODEL
The utility model provides a real-time measuring device for the dissolution rate of a coal seam water injection penetration rod, and the existing penetration rod dissolution rate measurement has the following problems that the method steps are complicated, the real-time detection cannot be realized, and the condition of inaccurate measurement caused by quality loss often exists.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
the embodiment of the utility model provides a real-time determination device for the dissolution rate of a coal seam water injection osmotic stick, which is characterized by comprising a dissolution device, wherein the osmotic stick is placed in the dissolution device, an inlet and an outlet of the dissolution device are respectively communicated with a water injection device and a measurement device, the water injection device can inject water with different pressures into the dissolution device, and an osmotic stick solution in the dissolution device is dissolved by pressure water to form a solution which enters the measurement device;
the measuring device comprises a real-time detection device and a movable sample pool frame, wherein the real-time detection device can detect the dissolution rate of the osmotic stick in real time, a blank sample pool, a standard sample pool and a test sample pool are arranged on the sample pool frame, the osmotic stick solution flows through the test sample pool, the sample pool frame is moved, and the real-time detection device can respectively detect the dissolution rates of the blank sample pool, the standard sample pool and the test sample pool in real time and transmit the dissolution rates to a data processing and displaying device;
a sampling device is arranged at the water outlet of the dissolving device;
the data processing and displaying device displays the concentration of the solution and the dissolution rate of the osmotic stick in real time through calculation.
Preferably, the measuring device comprises a measuring device box body, the sample pool frame is installed in the measuring device box body, light absorption plates are respectively arranged on two sides of the sample pool frame in the measuring device box body, a monochromator is installed between one light absorption plate and the sample pool frame, and a detector is installed between the other light absorption plate and the sample pool frame;
the light emitted by the monochromator passes through the sample cell on the sample cell rack to be received by the detector, and the detector records the absorbance of the solution with different concentrations in real time and transmits the data to the data processing and displaying device for calculation and analysis.
Preferably, the test sample pool is a transparent square groove pipe, two ends of the transparent square groove pipe are respectively connected with a hose, the hose at one end is connected with the water outlet of the dissolving device, and the hose at the other end extends out of the box body of the measuring device.
Preferably, the sampling device is including the intercommunication the sampling tube of dissolving device's delivery port be provided with the valve on the sampling tube the below of the sample connection of sampling tube is provided with the sampling cell.
Preferably, the lower part of one side of the dissolving device is provided with a water inlet, the upper part of the other side of the dissolving device is provided with a water outlet, the top of the dissolving device is provided with a dissolving device cover connected with the dissolving device through a hinge, the dissolving device cover is provided with a handrail, and a water-proof and permeable rubber strip is arranged between the dissolving device cover and the dissolving device.
Preferably, the widths of the blank sample cell, the standard sample cell and the test sample cell are equal.
Preferably, the water injection device comprises a water injection pump, the water injection pump pumps water from the water tank and then conveys the water into the dissolving device through a pipeline, a flow regulating valve and a water flow meter are mounted on the pipeline, and the water injection pump is regulated to convey water with different pressures into the dissolving device.
Preferably, the monochromator emits light with different frequencies, the sample cell is respectively tested under the illumination with different frequencies to obtain the frequency with the highest solution absorptivity, and the monochromator continuously emits the light with the frequency with the highest solution absorptivity.
Preferably, grooves are formed in two sides of the inside of the measuring device box, a slide rail is installed in each groove, a sample cell rack is installed on each slide rail, a push-pull button is installed on each sample cell rack, a button end of each push-pull button penetrates through the measuring device box and is exposed outside the measuring device box, and the button end of each push-pull button is pushed and pulled to push the sample cell rack to move along the slide rail, so that one of a blank sample cell, a standard sample cell and a test sample cell on the sample cell rack is moved to a position between the monochromator and the detector.
Preferably, the real-time measuring device further comprises a wastewater tank, the wastewater tank is arranged below the hose extending out of the measuring device box, and the penetrating rod solution flows into the wastewater tank.
The scheme of the utility model at least comprises the following beneficial effects:
in the scheme, a water injection device of the real-time measuring device can inject water with different pressures into the dissolving device, the water enters the dissolving device provided with the osmotic stick, the osmotic stick is dissolved, and the osmotic stick solution obtained by dissolving the osmotic stick solution flows into the measuring device to detect the dissolution rate of the osmotic stick in real time; the real-time measuring device simulates the field water injection environment, measures the dissolution rate of the osmotic stick in the flowing water state with different pressures, and is simple to operate; the real-time detection of the dissolution rate of the osmotic stick is realized, and the detection precision is higher.
Drawings
FIG. 1 is a schematic structural diagram of a device for measuring the dissolution rate of a coal seam flooding penetration rod in real time according to the present invention;
FIG. 2 is a left side view of a dissolving device of the device for measuring the dissolving rate of the coal seam water injection osmotic rod in real time.
FIG. 3 is a left side view of a measuring device of the device for real-time determination of dissolution rate of the coal seam water injection osmotic stick of the present invention.
Reference numerals:
1. a water injection device; 11. a water tank; 12. a water injection pump; 13. a flow regulating valve; 14. a water flow meter;
2. a dissolving device; 21. a water inlet; 22. a water outlet; 23. a permeate bar support frame; 24. a dissolving device cover; 241. a handrail; 242. a hinge; 243. waterproof adhesive tape;
3. a sampling port; 31. a valve; 32. a sampling pool;
4. a measuring device; 41. a light absorbing plate; 42. a monochromator; 43. a detector; 44. a slide rail; 441. a groove; 45. a sample cell holder; 451. push-pull buttons; 46. a blank sample cell; 47. a standard sample cell; 48. a test sample cell; 481. a hose; 482. an opaque tube;
5. a data processing and display device;
6. a wastewater tank.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1 to fig. 3, the present embodiment provides a device for determining a dissolution rate of a coal seam water injection osmotic rod in real time, which includes a dissolving device 2, an osmotic rod is placed in the dissolving device 2, an inlet and an outlet 22 of the dissolving device 2 are respectively communicated with a water injection device 1 and a measuring device 4, the water injection device 1 can inject water with different pressures into the dissolving device 2, and an osmotic rod solution in the dissolving device 2 is dissolved by pressure water to form a solution, which enters the measuring device 4; the measuring device 4 comprises a real-time detection device for detecting the dissolution rate of the osmotic stick in real time and a movable sample pool frame 45, a blank sample pool 46, a standard sample pool 47 and a test sample pool 48 are arranged on the sample pool frame 45, the osmotic stick solution flows through the test sample pool 48, the sample pool frame 45 is moved, and the real-time detection device can respectively detect the dissolution rates of the blank sample pool 46, the standard sample pool 47 and the test sample pool 48 in real time and transmit the dissolution rates to the data processing and display device 5; a sampling device is arranged at the water outlet 22 of the dissolving device 2; the data processing and displaying device 5 displays the concentration of the solution and the dissolution rate of the osmotic stick in real time through calculation. The water injection device 1 of the real-time measuring device can inject water with different pressures into the dissolving device 2, the water enters the dissolving device 2 provided with the osmotic stick, and the osmotic stick is dissolved to obtain an osmotic stick solution; the osmotic stick solution flows into the measuring device 4 to detect the dissolving rate of the osmotic stick in real time. The real-time measuring device simulates an on-site water injection environment, measures the dissolution rate of the osmotic stick in flowing water states with different pressures, and is simple to operate; the real-time detection of the dissolution rate of the osmotic stick is realized, and the detection precision is higher.
The measuring device 4 of this embodiment includes a measuring device 4 box, a sample cell rack 45 is installed in the measuring device 4 box, light absorption plates 41 are respectively arranged on two sides of the sample cell rack 45 in the measuring device 4 box, a monochromator 42 is installed between one light absorption plate 41 and the sample cell rack 45, a detector 43 is installed between the other light absorption plate 41 and the sample cell rack 45, the detector 43 is preferably a photomultiplier, light emitted by the monochromator 42 passes through a sample cell on the sample cell rack 45 and is received by the detector 43, the detector 43 records absorbance of solutions with different concentrations in real time, and transmits data to the data processing and displaying device 5 for calculation and analysis, and the data processing and displaying device 5 can process, display solution concentration and osmotic stick dissolution rate in real time through built-in software. In particular, the detection number may be transmitted to the data processing and display device 5 through a data line. The monochromator 42 emits light of different frequencies, the sample cell is tested under the illumination of different frequencies respectively to obtain the frequency with the highest solution absorptivity, and the monochromator 42 continuously emits light of the frequency with the highest solution absorptivity. As shown in fig. 3, grooves 441 are provided on both sides in the case of the measuring apparatus 4, slide rails 44 are installed in the grooves 441, a sample cell holder 45 is installed on the slide rails 44, a push-pull button 451 is installed on the sample cell holder 45, a button end of the push-pull button 451 passes through the case of the measuring apparatus 4 and is exposed to the outside of the case of the measuring apparatus 4, and a button end of the push-pull button 451 is allowed to push the sample cell holder 45 to move along the slide rails 44, so as to move one of a blank sample cell 46, a standard sample cell 47, and a test sample cell 48 on the sample cell holder 45 between the monochromator 42 and the detector 43. The movement of the sample cell is controlled by pushing and pulling the button 451, and the absorbance of different solutions in the blank sample cell 46, the standard sample cell 47 and the test sample cell 48 is sequentially measured by the irradiation range of the monochromator 42, respectively. The absorbance recorded by the detector 43 is transmitted to a data processing and display device, and the concentration of the solution is calculated. The detector 43 is used for measuring and analyzing the absorbance of different solution concentrations, the detector 43 has the function of recording data, and the detector 43 transmits the detection data to the data processing and displaying device 5 for data storage, calculation and display.
Specifically, the blank sample cell 46 and the standard sample cell 47 are transparent square grooves 441 with open upper sides, and the blank sample cell 46, the standard sample cell 47 and the test sample cell 48 have the same width. The test sample cell 48 is a transparent square groove 441 tube, two ends of the transparent square groove 441 tube are respectively connected with a hose 481, the hose 481 at one end is connected with the water outlet 22 of the dissolving device 2, the water outlet 22 is communicated with the hose 481 through an opaque tube 482, and the hose 481 at the other end extends out of the box body of the measuring device 4. The hose 481 is arranged such that the test cell 48 can follow the cell holder 45. The box of the measuring device 4 is made of opaque material, and the opaque material and the light absorption plate 41 are arranged to prevent the interference of an external light source on the experimental result.
The lower part of one side of dissolving device 2 of this embodiment is provided with water inlet 21, the upper portion of opposite side is provided with delivery port 22, the top of dissolving device 2 has dissolving device lid 24 of being connected with dissolving device 2 through hinge 242, as shown in fig. 2, install handrail 241 on dissolving device lid 24, be provided with the waterproof adhesive tape 243 between dissolving device lid 24 and dissolving device 2, avoid the problem that the experimental process leads to leaking because dissolving device lid 24 is sealed untight. Three U-shaped penetrating rod supporting frames 23 are arranged in the dissolving device 2, and the U-shaped penetrating rod supporting frames 23 are used for fixing and supporting the penetrating rods. In particular, the dissolving device 2 is a transparent cylinder made of high-strength pressure-resistant plastic, preferably with a diameter of 40-80 mm.
The water injection device 1 of the embodiment includes a water injection pump 12, the water injection pump 12 pumps water from the water tank 11 and then conveys the water to the dissolving device 2 through a pipeline, a flow regulating valve 13 and a water flow meter 14 are installed on the pipeline, the flow regulating valve 13 regulates and controls the water flow, and the water flow is read out through the water flow meter 14. The water injection pump 12 is adjusted to deliver water at different pressures into the dissolving device 2.
The real-time measuring device of the embodiment further comprises a wastewater pool 6, the wastewater pool 6 is arranged below the hose 481 extending out of the box body of the measuring device 4, and the solution of the permeation rod flows into the wastewater pool 6 to realize the discharge of wastewater.
The sampling device of this embodiment includes the sampling tube of the delivery port 22 of intercommunication dissolving device 2, is provided with valve 31 on the sampling tube, is provided with sample cell 32 in the below of the sample connection 3 of sampling tube. The solution in the sample cell 32 may be removed to facilitate analysis of other properties of the solution.
The working process of the device for measuring the dissolution rate of the coal seam water injection osmotic stick in real time is as follows:
preparing a certain amount of standard solution, and putting the standard solution into a standard sample cell 47;
a certain amount of water is taken and put into a blank sample cell 46;
opening the monochromator 42, the receiving plate and the data processing and displaying device 5, respectively testing the standard sample cell 47 and the blank sample cell 46 under the illumination of different frequencies, comparing to obtain the frequency with the highest solution absorption rate, and setting the monochromator 42 to continuously emit the light with the frequency;
open water injection pump 12, adjust flow control valve 13 and make the slow steady flow of solution, open dissolving device 2 upper cover through handrail 241, slowly put into the osmotic stick on osmotic stick support frame 23 with the osmotic stick, close dissolving device 2 upper cover, treat that the osmotic stick begins to dissolve after stable, data processing and display device 5 accessible calculate the dissolution rate of real-time display solution concentration and osmotic stick.
The processing procedure for calculating the dissolution rate of the osmotic stick is as follows:
under the condition of a certain wavelength, the concentration of the substance in the solution has a certain proportional relation with the attenuation degree of the light energy, and the absorbance of the solution is obtained from the beer law
In the formula (I), the compound is shown in the specification,
is the absorbance of the standard solution;
is the transmitted light intensity;
is the intensity of the incident light;
is the absorption coefficient;
is the sample cell width;
is the standard solution concentration.
By comparing the absorbances of the standard solution and the test solution, the solution concentration of the test solution can be obtained as
In the formula (I), the compound is shown in the specification,
to test solution concentration;
to test solution absorbance.
The concentration of the solution is regarded as constant in a short time, and the dissolution rate of the obtained osmotic rod is
In the formula (I), the compound is shown in the specification,
is the rate of osmotic stick dissolution;
is the change in mass of the osmotic stick;
is the dissolution time;
is composed of
Water yield in time;
is the water flow.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. The device for measuring the dissolution rate of the coal seam water injection osmotic stick in real time is characterized by comprising a dissolution device, wherein the osmotic stick is placed in the dissolution device, an inlet and an outlet of the dissolution device are respectively communicated with a water injection device and a measurement device, water with different pressures can be injected into the dissolution device by the water injection device, and an osmotic stick solution in the dissolution device is dissolved by pressure water to form a solution which enters the measurement device;
the measuring device comprises a real-time detection device and a movable sample pool frame, wherein the real-time detection device can detect the dissolution rate of the osmotic stick in real time, a blank sample pool, a standard sample pool and a test sample pool are arranged on the sample pool frame, the osmotic stick solution flows through the test sample pool, the sample pool frame is moved, and the real-time detection device can respectively detect the dissolution rates of the blank sample pool, the standard sample pool and the test sample pool in real time and transmit the dissolution rates to a data processing and displaying device;
a sampling device is arranged at the water outlet of the dissolving device;
the data processing and displaying device displays the concentration of the solution and the dissolution rate of the osmotic stick in real time through calculation.
2. The device for measuring the dissolution rate of the coal seam water injection penetration rod according to claim 1, wherein the measuring device comprises a measuring device box, the sample pool frame is arranged in the measuring device box, light absorption plates are respectively arranged on two sides of the sample pool frame in the measuring device box, a monochromator is arranged between one light absorption plate and the sample pool frame, and a detector is arranged between the other light absorption plate and the sample pool frame;
the light emitted by the monochromator passes through the sample cell on the sample cell rack to be received by the detector, and the detector records the absorbance of the solution with different concentrations in real time and transmits the data to the data processing and displaying device for calculation and analysis.
3. The device for measuring the dissolution rate of the coal seam water injection penetration rod according to claim 1, wherein the test sample pool is a transparent square groove pipe, two ends of the transparent square groove pipe are respectively connected with a hose, the hose at one end is connected with a water outlet of the dissolution device, and the hose at the other end extends out of the box body of the measurement device.
4. The device for measuring the dissolution rate of the coal seam water injection osmotic rod in real time as claimed in claim 1, wherein the sampling device comprises a sampling tube communicated with a water outlet of the dissolution device, a valve is arranged on the sampling tube, and a sampling pool is arranged below a sampling port of the sampling tube.
5. The device for measuring the dissolution rate of the coal seam water injection penetration rod according to claim 1, wherein a water inlet is formed in the lower part of one side of the dissolution device, a water outlet is formed in the upper part of the other side of the dissolution device, a dissolution device cover connected with the dissolution device through a hinge is arranged at the top of the dissolution device, a handrail is installed on the dissolution device cover, and a water-proof rubber strip is arranged between the dissolution device cover and the dissolution device.
6. The device for real-time determination of dissolution rate of a coal seam water injection permeate rod according to claim 1, wherein the widths of the blank sample cell, the standard sample cell and the test sample cell are equal.
7. The device for measuring the dissolution rate of the coal seam water injection osmotic rod according to claim 1, wherein the water injection device comprises a water injection pump, the water injection pump pumps water from a water tank and then conveys the water into the dissolution device through a pipeline, a flow regulating valve and a water flow meter are arranged on the pipeline, and the water injection pump is regulated to convey water with different pressures into the dissolution device.
8. The device for measuring the dissolution rate of the coal seam water injection permeability rod according to claim 2, wherein the monochromator emits light with different frequencies, the sample cell is respectively tested under the illumination with different frequencies to obtain the frequency with the highest solution absorption rate, and the monochromator continuously emits the light with the frequency with the highest solution absorption rate.
9. The device for real-time determination of dissolution rate of a coal seam water injection penetration rod according to claim 2, wherein grooves are formed on two sides in the measuring device box, slide rails are installed in the grooves, a sample cell rack is installed on the slide rails, a push-pull button is installed on the sample cell rack, a button end of the push-pull button penetrates through the measuring device box and is exposed outside the measuring device box, and a button end of the push-pull button is pushed and pulled to move the sample cell rack along the slide rails, so that one of a blank sample cell, a standard sample cell and a test sample cell on the sample cell rack is moved between the monochromator and the detector.
10. The device for real-time determination of dissolution rate of coal seam injection water permeability stick of claim 3, further comprising a waste water tank, wherein a waste water tank is disposed below the hose extending out of the measuring device case, and the solution of the permeability stick flows into the waste water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123252284.8U CN216082395U (en) | 2021-12-23 | 2021-12-23 | Real-time measuring device for dissolution rate of coal seam water injection osmotic stick |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123252284.8U CN216082395U (en) | 2021-12-23 | 2021-12-23 | Real-time measuring device for dissolution rate of coal seam water injection osmotic stick |
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| CN216082395U true CN216082395U (en) | 2022-03-18 |
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| CN202123252284.8U Expired - Fee Related CN216082395U (en) | 2021-12-23 | 2021-12-23 | Real-time measuring device for dissolution rate of coal seam water injection osmotic stick |
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- 2021-12-23 CN CN202123252284.8U patent/CN216082395U/en not_active Expired - Fee Related
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Granted publication date: 20220318 |