CN111579378A - Device for monitoring surface temperature change during loading and cracking of gas-containing coal rock - Google Patents
Device for monitoring surface temperature change during loading and cracking of gas-containing coal rock Download PDFInfo
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- CN111579378A CN111579378A CN202010645018.2A CN202010645018A CN111579378A CN 111579378 A CN111579378 A CN 111579378A CN 202010645018 A CN202010645018 A CN 202010645018A CN 111579378 A CN111579378 A CN 111579378A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/307—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
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- G01N2203/0044—Pneumatic means
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Abstract
The invention discloses a device for monitoring surface temperature change when gas-containing coal rock is loaded and broken, which comprises an external treatment box body, a data collection and collection box body, a gas supply assembly, an upper crushing assembly and a temperature detection assembly, wherein a controller is installed on the external treatment box body; the outer intercommunication of sealed experiment cylinder base has gas air feed subassembly, should gas air feed subassembly effectively treats quantitative transport gas in the coal petrography sample of detecting, the lower terminal surface of sealed experiment cylinder base evenly arranges and is equipped with multiunit temperature detect subassembly, temperature detect subassembly carries out data monitoring to the temperature variation real-time supervision of coal petrography sample contact surface area within range to the data collection box through fixing terminal surface under the outer processing box.
Description
Technical Field
The invention relates to the technical field of coal rock surface layer monitoring devices, in particular to a device for monitoring surface temperature change of gas-containing coal rock when the coal rock is loaded and broken.
Background
The mechanical property test of the coal rock sample is the most basic method for researching the stability problem of the mine rock mass, the yield failure of the mine rock mass is a dynamic process under the combined action of ground stress and mining stress, the mechanical property test parameters of the collected rock sample are measured under the laboratory condition, and the dynamic evolution characteristics of cracks under the compression state are obtained, which has important guiding significance for the prediction and forecast of the stability of the mine rock mass, and the coal rock also needs to be monitored, the prior art is used for an experimental device for monitoring the temperature change when the outer surface of the coal rock is broken, the temperature measurement is collected step by step through fixed-point collection and is influenced by the experimental environment, so that the obtained temperature value has larger deviation relatively, and the temperature monitoring of the gas coal rock can not be carried out in the true sense, therefore, a monitoring device for the surface temperature change when the gas coal rock is broken under load is necessary to be provided, to solve the above problems.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: a monitoring device for surface temperature change of gas-containing coal rock when loaded and broken comprises an external processing box body, a data collection and collection box body, a gas supply component, an upper crushing component and a temperature detection component, wherein two box doors are hermetically connected to the side surface of the external processing box body and used for sending or taking out a coal rock sample, a controller is installed on the external processing box body, a sealed experiment cylinder seat is fixedly arranged in the external processing box body, the upper crushing component is vertically arranged on the inner side of the upper end surface of the external processing box body,
the upper crushing assembly provides crushing loading force for the coal rock sample to be detected in the sealed experiment cylinder seat, so that the loaded fracture of the coal rock sample is compared with the internal fracture condition of the surface coal rock stratum;
the outer part of the sealing experiment cylinder seat is communicated with a gas supply component which effectively and quantitatively conveys gas in a coal rock sample to be detected,
the lower terminal surface of sealed experiment cylinder base evenly arranges and is equipped with multiunit temperature detect assembly, temperature detect assembly carries out data monitoring to the temperature variation real-time supervision of coal petrography sample contact surface area within range to terminal surface's data collection box under the outer processing box body through fixing.
As a preferred technical scheme of the invention, the upper crushing assembly comprises a telescopic cylinder, a guide seat, a buffer spring, a supporting upright post and a stamping plate, wherein the telescopic cylinder is vertically fixed at the central position of the upper end surface of the outer treatment box body, one end of the telescopic cylinder hermetically and slidably extends into the sealed experiment cylinder seat,
the output end of the telescopic cylinder is sleeved with a support upright post in a relatively sliding manner and is fixedly connected with the stamping plate through the support upright post, so that when the telescopic cylinder performs stamping operation, the stamping plate initially contacts with a coal rock sample to be detected and provides breaking force for the stamping plate through the support upright post;
the support post overcoat is equipped with the guide holder, should the guide holder is two sections collapsible formula structures, and its other end is connected fixedly with telescopic cylinder's output, parallel arrangement is equipped with a plurality of buffer spring in the guide holder.
As a preferred technical scheme of the invention, the stamping plate comprises a main compaction plate, reinforcing ribs, a plurality of elastic pressing panels and controllable telescopic parts, wherein the plurality of elastic pressing panels are uniformly distributed on the lower end face of the main compaction plate, the upper surface of the coal rock sample is provided with a stamping pressure through each elastic pressing panel, the controllable telescopic parts are symmetrically arranged on the left side and the right side of the upper end face of each elastic pressing panel, the other ends of the controllable telescopic parts are fixedly connected with the main compaction plate, and the cross section of each elastic pressing plate during stamping is effectively controlled to be in a shape through the telescopic state of the controllable telescopic parts;
and a plurality of reinforcing ribs are vertically arranged between the main compaction plate and the elastic compaction panel.
As a preferable technical solution of the present invention, the contact surface of the pressing panel is provided with a plurality of convex spheres.
As a preferred technical scheme of the invention, the temperature detection assembly comprises a detection probe, a signal converter, a fastener, a hydraulic telescopic rod, a conveying cable and detection panels, wherein a plurality of detection panels are arranged on the inner side of the lower end surface of the sealed experiment cylinder seat, each detection panel is contacted and attached with a coal and rock sample to be detected, and the surface temperature change of the coal and rock sample in the detection range is monitored;
a plurality of detection probes are arranged in the detection panel in a relatively sliding manner in the vertical direction, the other ends of the detection probes are fixedly connected with a signal converter, and the signal converter converts the temperature value detected by the detection probes into an electric signal and transmits the electric signal to the conveying cable through a fastening piece; the conveying cable is connected with the data collection box body;
a plurality of hydraulic telescopic rods are arranged between the detection panel and the signal converter in parallel, and the hydraulic telescopic rods are in an extending state in an initial state, so that the end part of the detection probe is fixed in the detection panel.
As a preferred technical solution of the present invention, an induction member is disposed in the detection panel and can slide up and down relatively, and a return spring is fixedly connected between the induction member and the detection panel, and the return spring returns the induction member into the detection panel through spring force after the detection probe ejects the induction member out of the detection panel for temperature detection;
the response piece includes upper end, side elastic diaphragm and connecting seat, be provided with the roof pressure notch with test probe looks adaptation on the connecting seat, just coaxial being provided with the upper end on the connecting seat, this the upper end is effectively with the coal petrography sample contact face after breaking to peripheral roof pressure for side elastic diaphragm on its lateral wall is abundant with the coal petrography sample contact, and passes through side elastic diaphragm temperature to test probe.
As a preferred technical scheme of the invention, the gas supply assembly comprises a conveying pipe fitting, an exhaust valve seat, an electric telescopic rod and an airflow nozzle, wherein a bearing seat is arranged in the sealed experimental cylinder seat, the conveying pipe fittings are symmetrically arranged on the left side and the right side of the bearing seat and communicated with an external gas supply pump,
a convection pipe is vertically communicated and fixed on the conveying pipe fitting through an exhaust valve seat, a plurality of airflow nozzles are vertically arranged on the pipe wall of the convection pipe, and the airflow nozzles are naturally arranged from the middle part of the convection pipe according to the length;
the exhaust valve seat is of a two-section telescopic structure, and an electric telescopic rod is fixedly connected between the convection tube and the bearing seat, so that the airflow nozzle can freely stretch into the reserved notch of the coal rock sample.
As a preferable technical scheme of the invention, the cylinder wall of the sealing experiment cylinder seat is also provided with an exhaust port.
Compared with the prior art, the invention provides a device for monitoring surface temperature change of gas-containing coal rock when loaded and cracked, which has the following beneficial effects:
according to the invention, the sealing experiment cylinder seat is fixed in the external treatment box body, and has high sealing property and bearing property, so that gas in the coal rock sample is prevented from leaking, and the use safety of the coal rock sample is ensured; the upper crushing assembly provides crushing loading force for the coal rock sample to simulate the internal fracture condition of the surface coal rock stratum, the elastic pressing panel can adjust the shape of the cross section of the crushing working through the controllable telescopic pieces on the two sides of the elastic pressing panel, so that various situations of punching the coal rock stratum by concentrated crushing pressure or dispersed crushing pressure under real conditions can be simulated, data collection is carried out on the temperature change of the outer surface of the coal rock stratum under each condition, and the monitoring authenticity and the monitoring universality are improved; moreover, the lower end face of the sealing experiment cylinder seat is provided with a plurality of groups of temperature detection assemblies, so that the temperature of each region range can be effectively detected in time, convenience and rapidness are realized, the temperature difference values of each fault and each gap can be effectively collected under the simulation condition, and higher accuracy is realized; the left side and the right side of the sealed experiment cylinder seat are also provided with gas supply assemblies which can fill gas into the coal rock sample in real time and effectively control the gas concentration of the coal rock sample.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the upper crushing assembly of the present invention;
FIG. 3 is a schematic view of a stamped plate of the present invention;
FIG. 4 is a schematic structural diagram of a temperature detecting assembly according to the present invention;
FIG. 5 is a cross-sectional view of the sensing element of the present invention;
FIG. 6 is a partial schematic view of a gas supply assembly according to the present invention;
in the figure: the device comprises an external treatment box body 1, a 2 gas air supply assembly, a 201 conveying pipe fitting, a 202 exhaust valve seat, a 203 airflow nozzle, a 204 convection pipe, a 205 electric telescopic rod, a 3 upper crushing assembly, a 301 telescopic cylinder, a 302 supporting upright post, a 303 guide seat, a 304 buffer spring, a 4 sealing experiment tube seat, a 401 bearing seat, a 5 temperature detection assembly, a 501 detection probe, a 502 hydraulic telescopic rod, a 503 signal converter, 504 fasteners, 505 conveying cables, a 6 data collection and collection box body, a 7 stamping plate, a 701 main compacting plate, a 702 elastic pressing panel, 703 reinforcing ribs, 704 controllable telescopic pieces, 705 convex spheres, 8 detection panels, 9 exhaust ports, 801 return springs, 802 connecting seats, 803 side elastic membranes and 804 upper end heads.
Detailed Description
Referring to fig. 1, the present invention provides a technical solution: a device for monitoring surface temperature change of gas-containing coal rock when loaded and broken comprises an external treatment box body 1, a data collection and collection box body 6, a gas supply component 2, an upper crushing component 3 and a temperature detection component 5, wherein two box doors (not shown in the figure) are hermetically connected to the side surface of the external treatment box body 1 and used for feeding or taking out a coal rock sample, a controller is installed on the external treatment box body 1, a sealed experiment cylinder seat 4 is fixedly arranged in the external treatment box body 1, the upper crushing component 3 is vertically arranged on the inner side of the upper end surface of the external treatment box body 1, and the sealed experiment cylinder seat has high sealing property and bearing property, prevents gas in the coal rock sample from leaking, and ensures the use safety of the coal rock sample;
the upper crushing component 3 provides crushing loading force for the coal rock sample to be detected in the sealed experiment cylinder seat 4, so that the loaded fracture of the coal rock sample is similar to the internal fracture condition of the surface coal rock stratum; the contact surface of the upper crushing component and the coal rock sample is formulated as the interior of a mine, and the contact surface of the temperature detection component and the coal rock sample is formulated as the surface of the mine;
the sealing experiment cylinder seat 4 is externally communicated with a gas supply component 2, the gas supply component 2 effectively and quantitatively conveys gas in a coal rock sample to be detected,
the lower terminal surface of sealed experiment cylinder seat 4 evenly arranges and is equipped with multiunit temperature detect assembly 5, each temperature detect assembly 5 carries out data monitoring to the temperature variation in the coal petrography sample contact surface area scope to through fixing the data collection box 6 of handling box 1 lower extreme face outward, can effectively carry out effective collection to the temperature variation value of each fault, break gap department, have higher accuracy.
Referring to fig. 2, in the present embodiment, the upper crushing assembly 3 includes a telescopic cylinder 301, a guide seat 303, a buffer spring 304, a support pillar 302, and a stamping plate 7, wherein the telescopic cylinder 301 is vertically fixed at a central position of an upper end surface of the outer processing box 1, and one end of the telescopic cylinder extends into the sealed experiment tube seat 4 in a sealing and sliding manner,
the support upright post 302 is sleeved outside the output end of the telescopic cylinder 301 in a relatively sliding manner, and is fixedly connected with the stamping plate 7 through the support upright post 302, so that when the telescopic cylinder 301 performs stamping operation, after the stamping plate 7 initially contacts with a coal rock sample to be detected, a breaking force is provided for the stamping plate 7 through the support upright post 302;
Referring to fig. 3, in this embodiment, the stamping plate 7 includes a main compacting plate 701, a reinforcing rib 703, a plurality of elastic pressing panels 702 uniformly arranged on a lower end surface of the main compacting plate 701, and each of the elastic pressing panels 702 provides a stamping force on an upper surface of a coal rock sample, the controllable elastic members 704 are symmetrically arranged on left and right sides of an upper end surface of each of the elastic pressing panels 702, and another end of each of the controllable elastic members 704 is fixedly connected to the main compacting plate 701, and effectively controls a cross section of the elastic pressing plate 702 during stamping through a stretching state;
a plurality of reinforcing ribs 703 are vertically arranged between the main compacting plate 701 and the elastic panel 702, so that the internal supporting strength of the elastic panel can be effectively improved.
In this embodiment, the contact surface of the pressing panel 702 is provided with a plurality of convex spheres 705, so that the coal rock sample can be conveniently and rapidly cracked.
Referring to fig. 4, in this embodiment, the temperature detection assembly 5 includes a detection probe 501, a signal converter 503, a fastener 504, a hydraulic telescopic rod 502, a conveying cable 505, and detection panels 8, wherein a plurality of detection panels 8 are disposed on an inner side of a lower end surface of the sealed experiment tube seat 4, each detection panel 8 contacts and is attached to a coal rock sample to be detected, and the surface temperature change of the coal rock sample in a detection range is monitored;
a plurality of detection probes 501 are arranged in the detection panel 8 in a relatively sliding manner in the vertical direction, a signal converter 503 is fixedly connected to the other end of each detection probe 501, and the signal converter 503 converts the temperature value detected by the detection probes 501 into an electric signal and transmits the electric signal to a transmission cable 505 through a fastener 504; the conveying cable 505 is connected with the data collection box 6;
a plurality of hydraulic telescopic rods 502 are arranged in parallel between the detection panel 8 and the signal converter 503, and the hydraulic telescopic rods 502 are in an extending state in an initial state, so that the end part of the detection probe 501 is fixed in the detection panel 8, wherein each temperature detection assembly averagely divides the coal rock sample into a plurality of detection areas, and each area can comprise a complete fracture layer, a partial fracture layer and an unbroken layer, so that the temperature monitoring is performed on the coal rock surface under various conditions, and the universality is high.
Referring to fig. 5, in this embodiment, an induction element is disposed in the detection panel 8 and can slide up and down relatively, and a return spring is fixedly connected between the induction element and the detection panel 8, and the return spring 801 returns the induction element into the detection panel 8 through spring force after the detection probe 501 ejects the induction element out of the detection panel 8 for temperature detection;
the sensing piece comprises an upper end 804, a side elastic membrane 803 and a connecting seat 802, wherein a jacking notch matched with the detection probe 501 is formed in the connecting seat 802, the upper end 804 is coaxially arranged on the connecting seat 802, and the upper end 804 effectively jacks the contact surface of a broken coal rock sample to the periphery, so that the side elastic membrane 803 on the side wall of the upper end is fully contacted with the coal rock sample and conducts heat to the detection probe 501 through the side elastic membrane 803.
Referring to fig. 6, in this embodiment, the gas supply assembly 2 includes a conveying pipe 2012, an exhaust valve seat 202, an electric telescopic rod 205 and an airflow nozzle 203, wherein a bearing seat 401 is disposed in the sealed experimental tube seat 4, the conveying pipe 201 is symmetrically disposed on the left and right sides of the bearing seat 401, the conveying pipe 201 is communicated with an external gas supply pump,
a convection pipe 204 is vertically communicated and fixed on the conveying pipe fitting 201 through an exhaust valve seat 202, a plurality of airflow nozzles 203 are vertically arranged on the pipe wall of the convection pipe 204, and the airflow nozzles 203 are naturally arranged from the middle part of the convection pipe according to length; after carrying out the gas air feed to the coal petrography sample, gas can be from the middle part to both sides diffusion for it distributes evenly, exhaust valve seat 202 is two sections retractable structures, just, convection tube 204 and bear and be connected between the seat 401 and be fixed with electric telescopic handle 205, make air current shower nozzle 203 freely stretches out and draws back to the reservation notch of coal petrography sample in.
In this embodiment, the wall of the sealed experiment cylinder seat 4 is further provided with an exhaust port 9, so that gas can be rapidly exhausted.
Specifically, before monitoring the coal rock loading rupture temperature change, the coal rock sample is placed in a sealed experiment cylinder seat, an air flow spray head is controlled to stretch into a reserved notch of the coal rock sample through the flexibility of an electric telescopic rod, gas is conveyed quantitatively to the notch, the coal rock sample is withdrawn from the notch after the conveying is finished, and the coal rock sample is kept still for a period of time. After gas completely distributes to the coal petrography sample, adjust the cross section that suppresses the panel through controllable telescopic link and become the form, with the broken pressure impact condition of carrying in the simulation mine, promote main compacting plate downstream by telescopic cylinder, buffer spring in the guide holder effectively reduces preliminary impact load, and can continuously provide bounce-back impulsive force, with the inside fluctuation before the simulation coal petrography is carried and is broken, at this moment, test probe is with the ejecting panel of listening of response piece, and through response piece contact coal petrography surface temperature value test probe, signal converter converts the temperature value that test probe detected into the signal of telecommunication and transmits to the data collection box through the transmission cable, thereby monitor temperature variation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept within the technical scope of the present invention, and the technical solution and the inventive concept thereof should be covered by the scope of the present invention.
Claims (8)
1. The utility model provides a contain gas coal petrography when loading and breaking surface temperature change monitoring devices, its includes outer processing box (1), data collection box (6), gas air feed subassembly (2), goes up and crushes subassembly (3) and temperature detect subassembly (5), wherein, the box side sealing connection who handles box (1) outward has two chamber doors for send into or take out the coal petrography sample, install controller, its characterized in that on outer processing box (1): a sealing experiment cylinder seat (4) is fixedly arranged in the outer treatment box body (1), an upper crushing component (3) is vertically arranged on the inner side of the upper end surface of the outer treatment box body (1),
the upper crushing component (3) provides crushing load force for the coal rock sample to be detected in the sealed experiment cylinder seat (4), so that the loaded fracture of the coal rock sample is similar to the internal fracture condition of the surface coal rock stratum;
the sealing experiment cylinder seat (4) is communicated with a gas supply component (2), the gas supply component (2) effectively and quantitatively conveys gas in a coal rock sample to be detected,
the lower end face of the sealing experiment cylinder seat (4) is uniformly provided with a plurality of groups of temperature detection assemblies (5), the temperature detection assemblies (5) monitor the temperature change in the area range of the contact surface of the coal rock sample in real time, and data monitoring is carried out through a data collection box body (6) fixed on the lower end face of the external treatment box body (1).
2. The device for monitoring the surface temperature change of the gas-containing coal rock during loaded fracture according to claim 1, wherein: the upper crushing assembly (3) comprises a telescopic cylinder (301), a guide seat (303), a buffer spring (304), a support upright post (302) and a stamping plate (7), wherein the telescopic cylinder (301) is vertically fixed at the central position of the upper end surface of the outer processing box body (1), one end of the telescopic cylinder is hermetically and slidably extended into the sealed experiment cylinder seat (4),
the output end of the telescopic cylinder (301) is sleeved with a support upright post (302) in a relatively sliding manner, and the support upright post (302) is fixedly connected with the stamping plate (7), so that when the telescopic cylinder (301) is used for stamping, the stamping plate (7) is subjected to primary contact with a coal rock sample to be detected and then provides breaking impact force for the stamping plate (7) through the support upright post (302);
the supporting upright post (302) is sleeved with a guide seat (303), the guide seat (303) is of a two-section retractable structure, the other end of the guide seat is fixedly connected with the output end of the telescopic cylinder (301), and a plurality of buffer springs (304) are arranged in the guide seat (303) in parallel.
3. The device for monitoring the surface temperature change of the gas-containing coal rock during loaded fracture according to claim 2, wherein: the stamping plate (7) comprises a main compaction plate (701), reinforcing ribs (703), elastic pressing panels (702) and controllable telescopic pieces (704), wherein a plurality of elastic pressing panels (702) are uniformly distributed on the lower end face of the main compaction plate (701), impact pressure is provided for the upper surface of a coal rock sample through the elastic pressing panels (702), the controllable telescopic pieces (704) are symmetrically arranged on the left side and the right side of the upper end face of each elastic pressing panel (702), the other ends of the controllable telescopic pieces (704) are fixedly connected with the main compaction plate (701), and the shape of the cross section of each elastic pressing plate (702) during stamping work is effectively controlled through the telescopic state of the controllable telescopic pieces;
a plurality of reinforcing ribs (703) are vertically arranged between the main compacting plate (701) and the elastic compacting panel (702).
4. The device for monitoring the surface temperature change of the gas-containing coal rock during loaded fracture according to claim 3, wherein: the contact surface of the elastic panel (702) is provided with a plurality of convex spheres (705).
5. The device for monitoring the surface temperature change of the gas-containing coal rock during loaded fracture according to claim 1, wherein: the temperature detection assembly (5) comprises a detection probe (501), a signal converter (503), a fastener (504), a hydraulic telescopic rod (502), a conveying cable (505) and detection panels (8), wherein the inner side of the lower end surface of the sealed experiment cylinder seat (4) is provided with a plurality of detection panels (8), each detection panel (8) is in contact fit with a coal rock sample to be detected, and the surface temperature change of the coal rock sample in a detection range is monitored;
a plurality of detection probes (501) are arranged in the detection panel (8) in a relatively sliding manner in the vertical direction, the other ends of the detection probes (501) are fixedly connected with a signal converter (503), and the signal converter (503) converts the temperature value detected by the detection probes (501) into an electric signal and transmits the electric signal to a conveying cable (505) through a fastener (504); the transmission cable (505) is connected with the data collection box body (6);
a plurality of hydraulic telescopic rods (502) are arranged between the detection panel (8) and the signal converter (503) in parallel, and the hydraulic telescopic rods (502) are in an extending state in an initial state, so that the end part of the detection probe (501) is fixed in the detection panel (8).
6. The device for monitoring the surface temperature change of the gas-containing coal rock during loaded fracture according to claim 5, wherein: the sensing part is arranged in the sensing panel (8) in a manner of relatively sliding up and down, a return spring is fixedly connected between the sensing part and the sensing panel (8), and the return spring (801) returns the sensing part into the sensing panel (8) through the elastic force of the spring after the sensing part is ejected out of the sensing panel (8) by the detection probe (501) for temperature detection;
the response piece includes upper end (804), side elastic diaphragm (803) and connecting seat (802), be provided with the roof pressure notch with test probe (501) looks adaptation on connecting seat (802), just coaxial upper end (804) that is provided with on connecting seat (802), this upper end (804) effectively will break the coal petrography sample contact face peripheral roof pressure after for side elastic diaphragm (803) on its lateral wall are abundant with the coal petrography sample contact, and pass through side elastic diaphragm (803) temperature transmission to test probe (501).
7. The device for monitoring the surface temperature change of the gas-containing coal rock during loaded fracture according to claim 1, wherein: the gas supply assembly (2) comprises a conveying pipe fitting (2012), an exhaust valve seat (202), an electric telescopic rod (205) and an air flow nozzle (203), wherein a bearing seat (401) is arranged in the sealed experiment tube seat (4), the conveying pipe fittings (201) are symmetrically arranged on the left side and the right side of the bearing seat (401), the conveying pipe fittings (201) are communicated with an external air supply pump,
a convection pipe (204) is vertically communicated and fixed on the conveying pipe fitting (201) through an exhaust valve seat (202), a plurality of airflow spray heads (203) are vertically arranged on the pipe wall of the convection pipe (204), and the airflow spray heads (203) are naturally arranged from the middle part of the convection pipe according to length;
the exhaust valve seat (202) is of a two-section telescopic structure, and an electric telescopic rod (205) is fixedly connected between the convection pipe (204) and the bearing seat (401), so that the air flow nozzle (203) can freely stretch into a reserved notch of a coal rock sample.
8. The device for monitoring the surface temperature change of the gas-containing coal rock during loaded fracture according to claim 1, wherein: and an exhaust port (9) is also arranged on the wall of the sealed experiment cylinder seat (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010645018.2A CN111579378B (en) | 2020-07-07 | 2020-07-07 | Device for monitoring surface temperature change during loading and cracking of gas-containing coal rock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010645018.2A CN111579378B (en) | 2020-07-07 | 2020-07-07 | Device for monitoring surface temperature change during loading and cracking of gas-containing coal rock |
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| Publication Number | Publication Date |
|---|---|
| CN111579378A true CN111579378A (en) | 2020-08-25 |
| CN111579378B CN111579378B (en) | 2023-01-24 |
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| CN202010645018.2A Active CN111579378B (en) | 2020-07-07 | 2020-07-07 | Device for monitoring surface temperature change during loading and cracking of gas-containing coal rock |
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