CN113009114B - Test device for generating, transmitting and monitoring temperature-controlled water vapor in soil body gradual humidification test - Google Patents
Test device for generating, transmitting and monitoring temperature-controlled water vapor in soil body gradual humidification test Download PDFInfo
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- CN113009114B CN113009114B CN202110258238.4A CN202110258238A CN113009114B CN 113009114 B CN113009114 B CN 113009114B CN 202110258238 A CN202110258238 A CN 202110258238A CN 113009114 B CN113009114 B CN 113009114B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 239000002689 soil Substances 0.000 title claims abstract description 12
- 238000012544 monitoring process Methods 0.000 title abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 238000005057 refrigeration Methods 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 description 10
- 239000011435 rock Substances 0.000 description 9
- 230000001808 coupling effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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- 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
- G01N33/24—Earth materials
Abstract
The invention discloses a test device for generating, transmitting and monitoring temperature-controlled water vapor in a soil body gradual humidification test, which comprises a humidification control system, a temperature control system and an acquisition control system; the humidifying control system and the temperature control system are respectively connected with the acquisition control system; the humidification control system comprises a primary humidification control box and a secondary humidifier; the temperature control system comprises a temperature control box; a first air outlet of the primary humidification control box is communicated with the temperature control box, the secondary humidifier is arranged in the temperature control box, a spiral copper pipe is spirally arranged on the inner wall of the temperature control box, and a temperature sensor is arranged in the temperature control box; the temperature control box is communicated with the refrigeration compressor through a fan; an air outlet pipe of the temperature control box is communicated with the air blast pump, and moisture flows into the sample through the air blast pump; the acquisition control system comprises a control computer which is respectively electrically connected with the humidification control system and the temperature control system.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering tests, and particularly relates to a test device for generating, transmitting and monitoring temperature-controlled water vapor in a soil body gradual humidification test.
Background
The earth-rock dam has the advantages of strong terrain adaptability, local materials, simple construction technology and the like, and is one of common dam types in dam construction. The recent earth-rock dam technology has been greatly developed since the 60's of the 20 th century, and has contributed to the construction of a batch of face-plate rock-fill dams and high earth-rock dams. A large number of researches show that the later deformation of the earth-rock dam is the main cause of damage to the earth-rock dam, wherein one of the main factors influencing the later deformation is soaking and humidifying deformation, such as primary water storage of the earth-rock dam, change of water level in the operation period and rainfall infiltration into the dam body. The change in humidity affects the strength and deformation of the damming material and also affects the additional settlement of the dam body. The coupling effect of temperature and stress conditions also exists in the actual operation process of the earth-rock dam, and the later deformation of the earth-rock dam can be influenced. Therefore, on the premise of accurately controlling the temperature and humidity changes, stress-strain characteristics of the dam material under the complex coupling action are discussed, the prediction precision of the deformation of the dam body and the core wall is improved, and the method has important significance for the safe operation of the earth-rock dam.
The existing conventional geomechanics test equipment changes the dry and wet conditions of a sample by soaking or sprinkling water for saturation in the test process, generally does not have the functions of controlling the humidity of a test material and automatically and gradually humidifying, and particularly cannot control the temperature of water vapor while humidifying.
Disclosure of Invention
The invention aims to provide a test device for generating, transmitting and monitoring temperature-controlled water vapor for a soil body gradual humidification test, aiming at overcoming the defects in the prior art and solving the problem that the prior art does not have the function of automatically and gradually humidifying test materials.
In order to achieve the purpose, the invention adopts the technical scheme that:
a test device for generating, transmitting and monitoring temperature-controlled water vapor in a soil body gradual humidification test comprises a humidification control system, a temperature control system and an acquisition control system; the humidifying control system and the temperature control system are respectively connected with the acquisition control system;
the humidification control system comprises a primary humidification control box and a secondary humidifier; the temperature control system comprises a temperature control box; a first air outlet of the primary humidification control box is communicated with the temperature control box, the secondary humidifier is arranged in the temperature control box, a spiral copper pipe is spirally arranged on the inner wall of the temperature control box, and a temperature sensor is arranged in the temperature control box; the temperature control box is communicated with the refrigeration compressor through a fan; an air outlet pipe of the temperature control box is communicated with the air blast pump, and moisture flows into the sample through the air blast pump; the acquisition control system comprises a control computer which is respectively electrically connected with the humidification control system and the temperature control system.
Furthermore, a temperature sensor and a humidity sensor are arranged on the air inlet pipeline and the air outlet pipeline of the temperature control box.
Furthermore, the lower part of the primary humidification control box is provided with a plurality of square well structures, a first water tank and a first ultrasonic generator are arranged in each well, the bottoms of the first water tanks are communicated, and the water levels are the same.
Further, the first water tank is communicated with an automatic water replenishing pipe, and an electromagnetic valve is installed on the automatic water replenishing pipe; a liquid level sensor is arranged at the bottom of the first water tank.
Furthermore, the top of the primary humidification control box is conical, and the first air outlet is formed in the top of the conical.
Furthermore, an air inlet is formed in the upper part of the first water tank in the primary humidification control box, and an air blast pump and a humidity controller are installed at the air inlet.
Furthermore, an exhaust port is arranged above the first water tank in the primary humidification control box, and a pressure gauge and an electromagnetic valve are installed at the exhaust port.
Furthermore, the lower part of the secondary humidifier is provided with a second ultrasonic generator, and the upper part of the secondary humidifier is provided with a second water tank.
The test device for generating, transmitting and monitoring temperature-controlled water vapor in the soil body gradual humidification test has the following beneficial effects:
the invention can provide temperature and humidity control water vapor for the samples of any types of geomechanical tests (such as triaxial compression test, lateral confinement compression test, rheological test and the like), changes the temperature and humidity conditions of the samples, and the temperature and humidity control water vapor directly acts on the samples, has higher control precision, further obtains the stress-strain characteristic of the damming material under the complex coupling action, and can provide an effective test means for the research of deformation and intensity change rules of the earth material under the coupling action of temperature, humidity and stress conditions.
Drawings
FIG. 1 is a diagram of a test device for a temperature-controlled water vapor generation, transmission and monitoring test of a soil body gradual humidification test.
FIG. 2 is a schematic structural diagram of a primary humidification control box of a test device for temperature-controlled water vapor generation, transmission and monitoring in a soil body gradual humidification test.
FIG. 3 is a schematic structural diagram of a secondary humidifier of the temperature-controlled water vapor generation, transmission and monitoring test device for the soil body gradual humidification test.
Wherein, 1, a primary humidifying control box; 2. a first air outlet; 3. a temperature sensor; 4. a humidity sensor; 5. a temperature control box; 6. a spiral copper pipe; 7. a refrigeration compressor; 8. a fan; 9. a temperature sensor; 10. a humidity sensor; 11. a secondary humidifier; 12. an air outlet pipe; 13. a blast pump; 14. a temperature sensor; 15. a humidity sensor; 16. a control computer; 17. a device case; 18. an exhaust port; 19. a pressure gauge; 20. a first water tank; 21. automatic water supply pipe; 22. a first ultrasonic generator; 23. a liquid level sensor; 24. an air inlet; 25. a blast pump; 26. a second air outlet; 27. a second ultrasonic generator; 28. a second water tank; 29. a humidity controller.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
According to one embodiment of the application, referring to fig. 1, the test device for temperature-controlled water vapor generation, transmission and monitoring of soil body gradual humidification test comprises a humidification control system, a temperature control system and an acquisition control system which are installed in a device box body.
The humidification control system and the temperature control system are electrically connected with the acquisition control system, monitoring data of other systems can be acquired through the acquisition control system, and feedback control is performed on the other systems according to the acquired data.
Each system will be described in detail below
Humidification control system
The humidification control system comprises a primary humidification control box 1 and a secondary humidifier 11, wherein the secondary humidifier 11 is arranged in a temperature control box 5 of the temperature control system.
Referring to fig. 2, the first outlet 2 of the primary humidification control box 1 communicates with a temperature control box 5, and a temperature sensor 3 and a humidity sensor 4 are installed on the communicated pipes.
The lower part of the primary humidifying control box 1 is provided with a plurality of square well structures, and a humidifying device consisting of a first ultrasonic generator 22 and a first water tank 20 is arranged in each well. The upper part of the first water tank 20 is of a conical structure, the caliber of the first water tank is gradually reduced, and the top of the conical structure is provided with a first air outlet 2.
The bottoms of the first water tanks 20 are communicated with each other to ensure that the water levels of all the first water tanks 20 in the primary humidification control box 1 are the same.
The bottom of the first water tank 20 is provided with a liquid level sensor 23, when the water level of the first water tank 20 reaches the lowest limit, the electromagnetic valve at the position of the automatic water replenishing pipe 21 is automatically opened to automatically replenish water into the first water tank 20, and when the water level reaches the highest limit, the electromagnetic valve at the position of the automatic water replenishing pipe 21 is automatically closed.
An air inlet 24 is arranged in the primary humidification control box 1, the air inlet 24 is connected with a pipeline at the top of the sample, and an air blast pump 25 is arranged at the air inlet 24 so as to pump out pore air with the temperature and humidity to be regulated from the sample. The air inlet 24 is provided with a humidity controller 29. When the value of the humidity sensor 4 is smaller than the target value, a plurality of sets of humidifying equipment can be started to provide water vapor together; when the value of the humidity sensor 4 is greater than its target value, the number of humidification apparatuses activated is reduced, and the humidity is lowered by the humidity controller 29.
The lower left in fig. 1 is the upper part of the test sample, i.e. at the air inlet 24; the top right hand corner of the figure represents the bottom of the sample, at the gas outlet 12.
The primary humidification control box 1 is provided with an exhaust port 18, a pressure gauge 19 is arranged at the exhaust port 18, when the pressure in the primary humidification control box 1 meets the requirement range, an electromagnetic valve at the exhaust port 18 is closed, and when the pressure does not meet the requirement, the electromagnetic valve at the exhaust port 18 is opened to adjust the pressure in the primary humidification control box 1.
Referring to fig. 3, the second ultrasonic generator 27 is disposed at the lower portion of the secondary humidifier 11, the second water tank 28 is disposed at the upper portion thereof, and the second air outlet 26 is disposed at the top surface thereof. The secondary humidifier 11 slightly adjusts the humidity of the water vapor according to the value of the humidity sensor 10 and the set value thereof, and the second water tank 28 is set to a fixed capacity, so that the requirement of one test can be met.
The moisture from the secondary humidifier 11 enters the temperature control box 1 to adjust the humidity of the air in the temperature control box 1, and then flows into the sample through the air outlet pipe 12 of the temperature control box 1 via the air blast pump 25.
The humidification control system adopts the combination of the primary humidification control box 1 and the secondary humidifier 11 to control the humidity of water vapor, firstly, the relative humidity of air is preliminarily humidified to a certain range through the primary humidification control box 1, and then the relative humidity is further adjusted through the secondary humidifier 11, so that the humidity control precision is improved.
Temperature control system
The inner wall of a temperature control box 5 of the temperature control system is provided with a spiral copper pipe 6 and a temperature sensor 9, and a refrigeration compressor 7 is connected with the temperature control box 5 through a fan 8.
The steam generated by the primary humidification control box 1 flows into the temperature control box 5 from the first air outlet 2 to be subjected to air temperature regulation, and after the humidity is further regulated by the secondary humidifier 11 in the temperature control box 5, the generated steam with controlled temperature and humidity is supplied to a required sample through the air outlet pipe 12 by the blower pump 13.
Acquisition control system
The acquisition control system comprises an acquisition control computer 16, and humidity sensors (4, 10, 15) and temperature sensors (5, 9, 14) which are arranged in the pipeline, the humidification control system and the temperature control system, and can acquire the readings of the sensors in real time and control the humidification control system, the temperature control system, the air blowing and exhausting system and the like.
The acquisition control system performs feedback control by an acquisition control computer 16 according to the real-time temperature in the temperature control box 5 measured by the temperature sensor 9, and adjusts the temperature in the temperature control box 5 by heating the spiral copper pipe 6 and the refrigeration compressor 7
The testing device can provide temperature and humidity controlled water vapor for samples of any type of geomechanical test.
According to one embodiment of the application, the test device of the scheme can be connected with a large-scale three-axis rheometer;
the air outlet pipe 12 is connected with a permeable plate of a rheometer chassis, the air inlet 24 is connected with a pipeline at the top of the sample, and pore air in the sample is circularly controlled to provide temperature and humidity controlled water vapor for a triaxial rheological test, change the temperature and humidity of the sample and study the rheological characteristics of the test material under the complex condition.
Before the test, the first water tank 20 in the primary humidification control tank 1 and the second water tank 28 in the secondary humidifier 11 were filled.
According to the test protocol, target values of the humidity sensor 4, the humidity controller 10, and the temperature sensor 9 are set.
And (3) developing a triaxial rheological test according to a preset flow, and after the rheological test is performed to a certain stage, providing temperature and humidity controlled water vapor from the bottom of the sample through the test system.
During the test, the acquisition control computer 16 controls the first ultrasonic generator 22, the blower pump 25 and the humidity controller 29 in the primary humidification control box 1 according to the value and the target value of the humidity sensor 4. When the value of the humidity sensor 4 is smaller than the target value, more humidifying devices are started; when the value of the humidity sensor 4 is greater than the target value, dehumidification is performed by the humidity controller 29.
In the test process, if the water level detected by the liquid level sensor 23 reaches the lower limit, the electromagnetic valve at the automatic water replenishing pipe 21 is automatically started to replenish water, and when the water level detected by the liquid level sensor 23 reaches the upper limit, the electromagnetic valve of the automatic water replenishing pipe 21 is automatically closed to stop water replenishing. If the pressure detected by the pressure gauge 19 exceeds the allowable range, the electromagnetic valve at the exhaust port 18 is automatically opened to adjust the pressure in the primary humidification control box 1.
The steam generated by the primary humidification control box 1 flows into the temperature control box 5 through the first air outlet 2.
During the test, the acquisition control computer 16 adjusts the temperature in the temperature control box 5 according to the value and the target value of the temperature sensor 9. When the temperature in the temperature control box 5 is higher than the target value, the temperature of the spiral copper pipe 6 is reduced, and meanwhile, the refrigeration compressor 7 is started, and cold air is blown into the temperature control box 5 through the fan 8. When the temperature in the temperature control box 5 is lower than the target value, the temperature of the spiral copper pipe 6 is increased. The control computer 16 further adjusts the relative humidity of the water vapor through the secondary humidifier by means of the value and the target value of the humidity sensor 4.
The temperature and humidity controlled water vapor generated by the temperature control box 5 flows into the sample from the permeable plate of the sample chassis through the air outlet pipe 12 by the air blowing pump 13, the test material is gradually humidified, and when the temperature and humidity at the drainage pipe on the sample are the same as the temperature and humidity set by the test, the sample humidification process is considered to be completed. The deformation value of the sample in the humidifying process is collected through a triaxial rheometer, and the influence of temperature and humidity on the deformation characteristic of the sample is researched.
The invention can provide temperature and humidity control circulating water vapor for any type of sample in the geomechanical test, keep the pore pressure in the sample unchanged, change the temperature and humidity conditions of the sample, directly act on the sample by the temperature and humidity control water vapor, have higher control precision, further obtain the stress-strain characteristic of the dam building material under the complex coupling action, and provide an effective test means for the research of deformation and strength change rules of the earth stone material under the coupling action of the temperature, the humidity and the stress conditions.
While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (1)
1. The utility model provides a test device that experimental control by temperature change steam of soil body progressively humidifying generates, transmits and control which characterized in that: comprises a humidifying control system, a temperature control system and an acquisition control system; the humidification control system and the temperature control system are respectively connected with the acquisition control system;
the humidification control system comprises a primary humidification control box and a secondary humidifier; the temperature control system comprises a temperature control box; the first air outlet of the primary humidification control box is communicated with the temperature control box, the secondary humidifier is arranged in the temperature control box, a spiral copper pipe is spirally arranged on the inner wall of the temperature control box, and a temperature sensor is arranged in the temperature control box; the temperature control box is communicated with the refrigeration compressor through a fan; an air outlet pipe of the temperature control box is communicated with the air blast pump, and moisture flows into the sample through the air blast pump; the acquisition control system comprises a control computer which is respectively electrically connected with the humidification control system and the temperature control system;
a temperature sensor and a humidity sensor are respectively arranged on the air inlet pipeline and the air outlet pipeline of the temperature control box;
the lower part of the primary humidification control box is provided with a plurality of square well structures, a first water tank and a first ultrasonic generator are arranged in each well, the bottoms of the first water tanks are communicated, and the water levels are the same;
the first water tank is communicated with an automatic water replenishing pipe, and an electromagnetic valve is arranged on the automatic water replenishing pipe; a liquid level sensor is arranged at the bottom of the first water tank;
the top of the primary humidification control box is conical, and a first air outlet is formed in the conical top;
an air inlet is formed in the upper part of a first water tank in the primary humidification control box, and an air blast pump and a humidity controller are installed at the air inlet;
an air outlet is arranged above the first water tank in the primary humidification control box, and a pressure gauge and an electromagnetic valve are arranged at the air outlet;
the lower part of the secondary humidifier is provided with a second ultrasonic generator, and the upper part of the secondary humidifier is provided with a second water tank.
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