CN108918337A - It is a kind of based in seal chamber continuously plus release gas experimental rig and test method - Google Patents
It is a kind of based in seal chamber continuously plus release gas experimental rig and test method Download PDFInfo
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- CN108918337A CN108918337A CN201811085396.9A CN201811085396A CN108918337A CN 108918337 A CN108918337 A CN 108918337A CN 201811085396 A CN201811085396 A CN 201811085396A CN 108918337 A CN108918337 A CN 108918337A
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- 238000010998 test method Methods 0.000 title claims abstract description 15
- 239000003245 coal Substances 0.000 claims abstract description 78
- 239000003921 oil Substances 0.000 claims abstract description 55
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 238000012544 monitoring process Methods 0.000 claims abstract description 27
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 25
- 238000013480 data collection Methods 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims abstract description 11
- 230000008859 change Effects 0.000 claims abstract description 8
- 239000000446 fuel Substances 0.000 claims abstract description 4
- 239000002817 coal dust Substances 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 14
- 239000000565 sealant Substances 0.000 claims description 8
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims 2
- 230000001681 protective effect Effects 0.000 abstract description 3
- 238000005065 mining Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect 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
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003519 ventilatory effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000005303 weighing Methods 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
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a kind of based on the gas experimental rig and test method that continuously add release in seal chamber, which includes seal cavity plus discharge mechanism, gas for giving control system, gas flow dynamic monitoring and data collection system；The seal cavity is a round outside but spuare inside column structure, and one cube of intracoelomic cavity is dug inside cylindrical body, is made of a cube intracoelomic cavity, sealing cover, air inlet, gas outlet, oil inlet, oil discharge outlet, steel plate bed course；Described plus discharge mechanism is made of electric-controlled hydraulic pumping plant, oil pipe, elastic hydraulic oil pocket, changes coal body pressure by controlling to elastic hydraulic oil pocket fuel delivery；The gas is connected for giving control system, gas flow dynamic monitoring system and the air inlet of seal cavity, gas outlet by steel gas pipeline；When analog coal body ambient pressure of the present invention changes, internal structure change situation and Gas Flow characteristic provide theory support for mine protective coat extracted and raising pressure relief gas pumping mining efficiency.
Description
Technical field
The present invention relates to mine protective coat extracteds and gas drainage technical field.
Background technique
The most of coal seams in China have the characteristics that poor air permeability, gas pressure are lower, coal seam is strong to gas adsorption ability,
The difficult larger and inefficiency of direct draining coal seam gas in the lower situation of coal seam permeability.Coal seam pressure is to influence coal seam hole
The major reason of gap cranny development and permeability height.Currently, acting on primitive coalbed by release by external power effect
And change coal body internal void fissured structure, improving coal seam permeability is to solve gas to threaten and improve having for gas drainage efficiency
One of efficacious prescriptions method.But the effect of gas pressure device to hole gap cranny development is also very important inside coal body, after coal seam pressure relief,
Under gas pressure effect, hole crack will expand deformation, and then influence Gas Flow.Previous laboratory gas tests dress
The Gas Flow inside when can not achieve simulation coal body pressure change is set, coal body pressure and gas pressure coupling can not be also simulated
Gas Flow feature under effect.Circulation plus release condition can be not only provided for coal body therefore, it is necessary to a kind of, but also can be provided not
With the experimental rig of mash gas balancing pressure, realize between coal body internal pressure, coal gas pressure, coal gas flowing three
The research of relationship ensures mine peace to provide theoretical foundation for mine protective coat extracted and raising pressure relief gas pumping mining efficiency
Overall height effect production.
Summary of the invention
It is an object of the invention to overcome laboratory to have gas experimental rig not simulating coal body pressure and gas pressure
When variation inside coal body Gas Flow deficiency, provide in a kind of seal chamber continuously plus the gas experimental rig of release and test
Method realizes the simulation and experimental study influenced when coal body pressure and gas pressure variation on coal body inside Gas Flow.
To achieve the goals above, the technical solution adopted by the present invention is as follows：
It is a kind of based on continuously plus the gas experimental rig and test method of release, including seal cavity, plus being unloaded in seal chamber
Carry set, gas is for giving control system, gas flow dynamic monitoring and data collection system；The seal cavity is an outer circle
Interior square body structure digs one cube of intracoelomic cavity in column body；Described plus discharge mechanism is by electric-controlled hydraulic pumping plant, oil pipe, elasticity
Hydraulic fluid chamber composition；The gas is for giving control system, gas flow dynamic monitoring and data collection system and seal cavity
Air inlet, gas outlet is tightly connected by steel gas pipeline.
The seal cavity is by a cube intracoelomic cavity, sealing cover, air inlet, gas outlet, oil inlet, oil return opening, steel plate bed course
Composition, described cube of intracoelomic cavity are used to coal dust being pressed into lump coal sample；Air inlet and air outlet are respectively placed in a seal cavity left side
Right monosymmetric center, oil inlet and oil return opening are placed in the symmetrical center in seal cavity front and rear sides；The steel
Plate bed course is placed in inner cavity above coal dust, makes coal dust uniform force by bed course.
Described plus discharge mechanism is made of electric-controlled hydraulic pumping plant, oil pipe, elastic hydraulic oil pocket, and elastic hydraulic oil pocket is located at coal
Body center, oil inlet, the oil return opening of oil pipe and seal cavity are tightly connected, by control fuel delivery number can be achieved continuously to follow
Ring adjusts pressure value, and pressure is passed to coal body by elastic hydraulic oil pocket, changes the born pressure of coal body to realize.
The gas includes that high pressure gas tank, pressure regulator valve, steel gas pipeline, gas pipeline are opened for giving control system
It closes, be serially connected between all parts by steel gas pipeline and be connected and sealed with the air inlet of seal cavity.
The gas flow dynamic monitoring and data collection system include delicate flow meter, data acquisition computer, gas
Pressure gauge, steel gas pipeline are serially connected between all parts by steel gas pipeline, and with seal cavity gas outlet into
Row is tightly connected, and data acquisition computer is connected with delicate flow meter by USB interface.
Based on the test method for the gas experimental rig for continuously adding release in seal chamber, include the following steps：
A. device is installed：
By seal cavity with plus after discharge mechanism connect, coal dust is placed in cube intracoelomic cavity and is pressed into lump coal sample, it is stubborn
Then top cover labyrinth supplies that gas gives control system and gas flow dynamic monitoring and data collection system and seal cavity is close
Envelope connection.
B. device seals：
Sealing cover is connected by sealing screw thread with seal washer with seal cavity；Air inlet, gas outlet and oil inlet, oil return
It is tightly connected at mouthful by sealing screw thread and sealant, and each interface sealing effect of close inspection.
C. gas adsorption and flowing：
High pressure gas tank and gas pipeline switch are opened, watt in seal cavity lump coal sample is flowed by pressure regulation valve regulation
This pressure value persistently leads to constant pressure gas for 24 hours, makes the abundant adsorbed gas of lump coal sample, then opens and switchs at gas outlet, makes lump coal
Sample reaches Dynamic Adsorption balance, monitors gas pressure and gas flow speed, and monitors after subsequent plus release before and after dynamic equilibrium
Gas pressure, gas flow speed and gas flow etc..
D. continuously add release：
The present invention is carried out using mode below to lump coal sample plus release：
Elastic hydraulic oil pocket is placed in lump coal sample central part, and original oil pressure value is consistent with lump coal sample reset pressure, when
After lump coal sample gas reaches dynamic equilibrium, by electric-controlled hydraulic pumping plant change to elastic hydraulic oil pocket fuel delivery number control
Its pressure applied to lump coal sample is made, achievees the purpose that lump coal sample adds release, so that it is flat to change lump coal sample gas dynamic
Weighing apparatus.
F, flow monitoring and data acquisition：
During the entire test of lump coal sample, gas pressure table, delicate flow meter and data acquisition computer are always
It is in running order, pass through gas flow, gas pressure, gas in data collection and analysis software real-time dynamic monitoring lump coal sample
The data such as speed.
Beneficial functions effect of the invention：
1. having sealing screw thread and seal washer on the inside of sealing cover of the present invention, it can be tightly connected with cavity, sealing means letter
List and good airproof performance；Steel plate bed course is close to guarantee lump coal sample uniform stressed below sealing cover and above lump coal sample；Air inlet
It is connected at gas outlet, oil inlet and oil return opening by sealing thread seal, and breaks sealant on the outside of interface, sealing effect
Well；At seal cavity air inlet and air outlet inner wall be equipped with combination metallic sieve, it can be achieved that lump coal sample face ventilatory function.
2. the present invention can by adding discharge mechanism, continuously recycle lump coal sample is carried out plus release and can be constant
It is maintained at a certain pressure value, realizes the analog simulation for adding release situation to the coal seam in mine actual production.
3. the present invention uses gas flow dynamic monitoring and data collection system, can real-time dynamic monitoring lump coal sample gas
Changes in flow rate, data acquisition is convenient, high degree of automation.
4. the present invention can calculate the deflection of lump coal sample by the volume change of spherical shaped elastomeric hydraulic fluid chamber, can
For the coupled relation between Study on Coal stressor layer, gas pressure, hole crack.
Detailed description of the invention
Fig. 1 is that a kind of structure based on the gas experimental rig and test method that continuously add release in seal chamber of the present invention is shown
It is intended to
Fig. 2 is seal cavity and the structural schematic diagram for adding discharge mechanism in Fig. 1
Fig. 3 is cavity sealing cover and seal cavity top view in Fig. 1
In figure：1- high pressure gas tank；2- pressure regulator valve；3- steel gas pipeline；4A- gas pipeline switch；4B- air inlet is opened
It closes；The gas outlet 4C- switch；5- gas pressure table；6- delicate flow meter；7- air inlet；8- seal cavity；9- lump coal sample；10-
Elastic hydraulic oil pocket；11- combines metallic sieve；The gas outlet 12-；13A, 13B, 13C- seal screw thread；14- seal washer；15- steel
Plate bed course；16- sealing cover；17- data acquisition computer；18- electric-controlled hydraulic pumping plant；19- oil inlet pipe；20- oil return pipe；21- into
Hydraulic fluid port；22- oil return opening；23- hydraulic oil；24- cubes of intracoelomic cavity.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in more detail.
As shown in Figure 1, Figure 2 and Figure 3, a kind of based on the gas experimental rig and the test side that continuously add release in seal chamber
Method, including seal cavity plus discharge mechanism, gas are for giving control system, gas flow dynamic monitoring and data collection system.
The seal cavity 8 is a round outside but spuare inside column structure；It is described to add discharge mechanism by electric-controlled hydraulic pumping plant 18, oil inlet pipe 19, return
Oil pipe 20, elastic hydraulic oil pocket 10 form；The gas is for giving control system, gas flow dynamic monitoring system and seal chamber
The air inlet 7 of body, gas outlet 12 are tightly connected by steel gas pipeline 3.
The seal cavity 8 be a round outside but spuare inside column structure, seal cavity 8 include cube intracoelomic cavity 24, air inlet 7,
Gas outlet 12, steel plate bed course 15, sealing cover 16, oil inlet 21, oil return opening 22.12 interface steel of the air inlet 7 and gas outlet
Gas pipeline processed is provided with sealing screw thread 13A, is tightly connected after swathing certain thickness raw material band with air inlet 7, gas outlet 12, and
Sealant sealing is played on the outside of interface, sealing effect is good；It is oily inside and outside the oil inlet 21, oil return opening 22 and seal cavity
Pipe plays sealant sealing by sealing screw thread 13C connection on the outside of interface, and sealing effect is good；Described cube of intracoelomic cavity
Coal dust is placed in 24, steel plate bed course 15 is placed on coal dust, by applying certain time constant pressure on 15 top of steel plate bed course,
Coal dust is made into lump coal sample 9；Sealing cover 8 and seal cavity 16 are connected by sealing screw thread 13B and the connection sealing of seal washer 14
It connects；The seal cavity air inlet 7,12 inner wall of gas outlet are equipped with combination metallic sieve 11, it can be achieved that the face of lump coal sample is ventilated
Effect.
The gas is located on the left of seal cavity for giving control system, including high pressure gas tank 1, pressure regulator valve 2, steel watt
This pipeline 3, gas switch 4A are serially connected between all parts by steel gas pipeline 3, and with seal cavity air inlet 7
It is tightly connected, watt of lump coal sample 9 in gas flow and the seal cavity in steel gas pipeline 3 is controlled by pressure regulator valve 2
This adsorption equilibrium pressure.
Described plus discharge mechanism includes electric-controlled hydraulic pumping plant 18, oil inlet pipe 19, oil return pipe 20, elastic hydraulic oil pocket 10, is led to
Cross hydraulic oil 23 in control elastic hydraulic oil pocket 10 number control output pressure, pressure is passed by elastic hydraulic oil pocket 10
Lump coal sample 9 is passed, the oil pipe end inside and outside oil inlet 21, oil return opening 22 and seal cavity is provided with sealing screw thread 13C,
The tubing seal of oil inlet 21, oil return opening 22 with inside and outside can be made to connect, break sealant on the outside of interface, sealing effect is good
It is good.When test, first coal dust is placed in cube intracoelomic cavity 24, then steel plate bed course 15 is covered and is pressed on coal dust, by steel
15 top of plate bed course applies certain time constant pressure (pressure applied and oil pressure value one in elastic hydraulic oil pocket 10 at this time
Cause), coal dust is pressed into lump coal sample 9, finally connect sealing cover 16 with seal cavity 8.
The gas flow dynamic monitoring and data collection system are located at left and right sides of seal cavity, including steel gas pipe
Road 3, gas pressure table 5, delicate flow meter 6, data acquisition computer 17 pass through 3 phase of steel gas pipeline between all parts
Mutually series connection, and be connected and sealed with seal cavity gas outlet 12, data acquisition computer 17 and delicate flow meter 6 pass through USB
Connector connection, can real-time monitoring record flow through the gas pressure of lump coal sample, gas in steel gas pipeline and seal cavity
Flow and gas flow speed changing value.
Based on the test method for the gas experimental rig for continuously adding release in seal chamber, include the following steps：
A. device is installed：
After first elastic hydraulic oil pocket 10, oil inlet pipe 19, oil return pipe 20 and oil inlet 21, oil return opening 22 are tightly connected, then
Coal dust is placed in cube intracoelomic cavity 24, steel plate bed course 15 is placed on coal dust and applies certain pressure, is pressed into lump coal sample
9, sealing cover 16 and seal cavity 8 are connected, finally again gas for giving control system and gas flow dynamic monitoring and number
It is tightly connected according to acquisition system and seal cavity 8.
B. device seals：
Sealing cover 16 and seal cavity 8 are connected by sealing screw thread 13B and seal washer 14；Air inlet 7,12 and of gas outlet
Pass through sealing screw thread 13A, 13C at oil inlet 21, oil return opening 22 respectively and sealant is tightly connected, and each interface of close inspection
Sealing effect.
C. gas adsorption and flowing：
High pressure gas tank 1 and gas pipeline switch 4A are opened, gas pressure value is adjusted by pressure regulator valve 2, opens air inlet
Switch 7, close gas outlet switch 12, make gas flow through gas pressure table 5, delicate flow meter 6, combination metallic sieve 11 entrance it is close
Lump coal sample 9 in cavity is sealed, persistently leads to constant pressure gas for 24 hours, makes the abundant adsorbed gas of lump coal sample 9, gas outlet is then opened and opens
12 are closed, until lump coal sample 9 reaches Dynamic Adsorption balance, monitoring record gas pressure and flow velocity, and monitoring record is subsequent plus unloads
Gas pressure, gas flow speed and gas flow after pressure before and after dynamic equilibrium etc..
D. continuously add release：
The present invention is carried out using mode below to lump coal sample plus release：
Elastic hydraulic oil pocket 10 is placed in 9 central part of lump coal sample, 9 reset pressure one of original oil pressure value and lump coal sample
It causes, after 9 gas of lump coal sample reaches dynamic equilibrium, is changed by electric-controlled hydraulic pumping plant 18 to hydraulic in elastic hydraulic oil pocket 10
Oil 23 number control the pressure that its applies lump coal sample 9, achieve the purpose that lump coal sample 9 plus release, to change
The gas dynamic equilibrium of lump coal sample 9, adds stress-relief process controllable, continuously can add release according to certain gradient.
F, flow monitoring and data acquisition：
During the entire test to lump coal sample 9, gas pressure table 5, delicate flow meter 6 and data acquisition computer
17 is in running order always, passes through gas flow, gas pressure in data collection and analysis software real-time dynamic monitoring lump coal sample 9
The data such as power, gas speed.Meanwhile it can be calculated inside lump coal sample 9 by the changing value of 10 volume of elastic hydraulic oil pocket
The deflection of structure.
Claims (7)
1. a kind of based on the gas experimental rig and test method that continuously add release in seal chamber, wherein the experimental rig packet
Seal cavity plus discharge mechanism, gas are included for giving control system, gas flow dynamic monitoring and data collection system；It is described
Seal cavity is a round outside but spuare inside column structure, and one cube of intracoelomic cavity is dug inside cylindrical body；Described plus discharge mechanism is by automatically controlled
Hydraulic power unit, oil pipe, elastic hydraulic oil pocket composition；The gas is for giving control system, gas flow dynamic monitoring and data
The air inlet of acquisition system and seal cavity, gas outlet are tightly connected by steel gas pipeline.
2. according to claim 1 it is a kind of based in seal chamber continuously plus release gas experimental rig and test method,
It is characterized in that：The seal cavity includes cube intracoelomic cavity, sealing cover, air inlet, gas outlet, oil inlet, oil return opening, metal mat
Layer；Air inlet and air outlet are respectively placed in the medianly zygomorphic center of seal cavity, and oil inlet and oil return opening are placed in close
Seal the symmetrical center in cavity front and rear sides；The metal mat is placed on coal dust top；Sealing is provided on the inside of the sealing cover
Screw thread is simultaneously equipped with seal washer.
3. according to claim 1 it is a kind of based in seal chamber continuously plus release gas experimental rig and test method,
It is characterized in that：Described plus discharge mechanism, elastic hydraulic oil pocket are an elastic sphere, are placed in coal body center, oil inlet and oil return
Each component is threadedly coupled by sealing at mouthful, breaks sealant on the outside of interface.
4. according to claim 1 it is a kind of based in seal chamber continuously plus release gas experimental rig and test method,
It is characterized in that：The gas includes that high pressure gas tank, pressure regulator valve, steel gas pipeline, gas pipeline are opened for giving control system
It closes, is serially connected between all parts by steel gas pipeline, and be tightly connected with seal cavity air inlet.
5. it is according to claim 1 it is a kind of based in seal chamber continuously plus release gas experimental rig and test method,
It is characterized in that：The seal cavity air inlet is equipped with inner wall at gas outlet combines metallic sieve.
6. it is according to claim 1 it is a kind of based in seal chamber continuously plus release gas experimental rig and test method,
It is characterized in that：The gas flow dynamic monitoring and data collection system are located at left and right sides of seal cavity, including steel watt
This pipeline, gas pressure table, delicate flow meter, data acquisition computer, it is mutual by steel gas pipeline between all parts
Series connection, and be connected and sealed with seal cavity gas outlet, data acquisition computer and delicate flow meter are connected by USB interface
It connects.
7. based in seal chamber continuously plus release test method, using described in one of claim 1 to 6 based in seal chamber
Continuous plus release experimental rig, it is characterised in that：Include the following steps：
A. device is installed：
After being first tightly connected elastic hydraulic oil pocket, oil pipe and oil inlet, oil return opening, then coal dust is placed in cube intracoelomic cavity,
Steel plate bed course is placed on coal dust and applies certain pressure, is pressed into lump coal sample, sealing cover is connected with seal cavity, finally
Gas is tightly connected for giving control system and gas flow dynamic monitoring and data collection system and seal cavity again.
B. device seals：
Sealing cover is connected by sealing screw thread with seal washer with seal cavity；At air inlet, gas outlet and oil inlet, oil return opening
It is tightly connected by sealing screw thread and sealant, and each interface sealing effect of close inspection.
C. gas adsorption and flowing：
High pressure gas tank is opened, by pressure regulation valve regulation gas pressure value, air inlet switch is opened, closes gas outlet switch, make
Gas flows through gas pressure table, delicate flow meter, combination metallic sieve and enters lump coal sample in seal cavity, persistently leads to constant pressure watt
This makes the abundant adsorbed gas of lump coal sample for 24 hours, then opens gas outlet switch, until lump coal sample reaches Dynamic Adsorption balance,
Monitoring record gas pressure and gas flow speed, and the gas pressure after monitoring record is subsequent plus release before and after dynamic equilibrium, gas
Flow velocity and gas flow etc..
D. continuously add release：
The present invention is carried out using mode below to lump coal sample plus release：
Elastic hydraulic oil pocket is placed in lump coal sample central part, and original oil pressure value is consistent with coal body reset pressure, when lump coal sample
After interior gas reaches dynamic equilibrium, by electric-controlled hydraulic pumping plant change to elastic hydraulic oil pocket fuel delivery number it is right to control its
The pressure that lump coal sample applies.
F, flow monitoring and data acquisition：
During the entire test to lump coal sample, gas pressure table, delicate flow meter and data acquisition computer are located always
In working condition, pass through gas flow, gas pressure, gas speed in data collection and analysis software real-time dynamic monitoring sample etc.
Data, meanwhile, by the changing value of elastic hydraulic oil chamber volume, the deflection of lump coal sample internal structure is calculated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811085396.9A CN108918337A (en) | 2018-09-18 | 2018-09-18 | It is a kind of based in seal chamber continuously plus release gas experimental rig and test method |
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| CN201811085396.9A CN108918337A (en) | 2018-09-18 | 2018-09-18 | It is a kind of based in seal chamber continuously plus release gas experimental rig and test method |
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Application publication date: 20181130 |