CN111579342B - Gas-containing sample preparation device for coal rock experiment - Google Patents
Gas-containing sample preparation device for coal rock experiment Download PDFInfo
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- CN111579342B CN111579342B CN202010489876.2A CN202010489876A CN111579342B CN 111579342 B CN111579342 B CN 111579342B CN 202010489876 A CN202010489876 A CN 202010489876A CN 111579342 B CN111579342 B CN 111579342B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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
- G01N1/36—Embedding or analogous mounting of samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a preparation device of a gas-containing sample for coal and rock experiments, which comprises an upper hydraulic cylinder (A1), a forming die (B) and a lower hydraulic cylinder (A2) which are sequentially arranged on a symmetrical upright post (2) from top to bottom; a first die (10) is embedded in the forming die, a second die (9) is embedded in the first die (10), and a third die (7) is embedded in the second die (9); the first compression bar (1) of the upper hydraulic cylinder extends downwards into the upper part of the forming die (B) through the perforation of the upper cover plate (8); the second compression bar (14) of the lower hydraulic oil cylinder upwards extends into the lower part of the forming die (B) through the perforation of the lower cover plate (12), the first compression bar (1) and the second compression bar (14) are coaxially installed, and the side wall of the forming die (B) is provided with an air inlet pipe (11) communicated with an adsorption air source. The invention has the technical effects that: the compression molding of coal rock samples with various sizes and gas-containing states is realized.
Description
Technical Field
The invention belongs to the technical field of coal rock experiments, and particularly relates to a gas-containing sample preparation device for coal rock experiments.
Background
The coal mine safety production relates to national energy supply, and the basic research of the physical and mechanical properties of coal and rock is necessarily carried out. When researching the extensive and different-deformation structural coal with different development degrees in China, the coal seam is softer and is often difficult to cut and process by taking a large sample, so that coal dust or rock dust is usually pressed into blocks to facilitate the relevant work of unfolding.
The existing coal rock experiment sample pressing method is mainly divided into two types of uniaxial pressing and triaxial pressing. The uniaxial pressing coal rock experimental sample applies unidirectional force to the crushed coal rock sample so as to solidify and shape the sample, but the sample is possibly stressed unevenly, is not easy to take out and can only be prepared into a sample with one size, so that the subsequent experimental result is influenced. The triaxial compression method is to apply pressure from three directions so as to solidify and shape the coal rock sample, but the triaxial compression method has complex operation and complex device, and can only realize the sample compression process with a single size.
The existing coal rock sample pressing technology has the following main problems: 1. the influence of gas in the coal rock forming process is ignored, the coal rock experimental sample is difficult to prepare by adopting a2, single-shaft pressing or three-shaft pressing mode, and particularly, the cuboid experimental sample is difficult to press and form by adopting the three-shaft pressing method.
Disclosure of Invention
Aiming at the problems existing in the prior art, the technical problem to be solved by the invention is to provide the gas-containing sample preparation device for the coal rock experiment, which can replace uniaxial or triaxial loading conditions to realize the compression molding of coal rock samples with various sizes and gas-containing states, and is convenient and quick to compress and mold.
The technical problem to be solved by the invention is realized by the technical scheme that the device comprises an upper hydraulic cylinder, a forming die and a lower hydraulic cylinder which are sequentially arranged from top to bottom, wherein the upper hydraulic cylinder, the forming die and the lower hydraulic cylinder are fixed on at least two symmetrical upright posts; the forming die comprises a shell, an upper cover plate and a lower cover plate, wherein the shell is fixed at the middle section of the upright post, the upper cover plate and the lower cover plate cover the upper surface and the lower surface of the shell and are sealed by a second sealing ring, lugs at the edge of the cover plate are sleeved on the upright post in a sliding manner and are compressed by nuts, and a first die is embedded in the shell; the first die is internally embedded with a second die, and the second die is internally embedded with a third die;
the first compression bar of the upper hydraulic cylinder downwards extends into the upper part of the forming die through the perforation of the upper cover plate; the second compression bar of the lower hydraulic cylinder upwards extends into the lower part of the forming die through the perforation of the lower cover plate, the first compression bar and the second compression bar are coaxially arranged, and a first sealing ring is arranged in the perforation of the upper cover plate and the perforation of the lower cover plate; an air inlet pipe is arranged on the side wall of the forming die and communicated with an adsorption air source.
Compared with the existing coal rock sample preparation device, the invention has the following technical effects:
because the forming die comprises a plurality of cavities, the press forming of the loose coal rock samples with various sizes and gas-containing states can be realized, the sample preparation function under the single-axis or triaxial coal rock experimental loading condition can be met, the success rate of experimental sample preparation is ensured, and the influence of gas on the coal rock forming process is considered.
Drawings
The drawings of the present invention are described as follows:
FIG. 1 is a schematic diagram of the structure of the device of the present invention;
FIG. 2 is a perspective view of the device of the present invention;
FIG. 3 is a schematic structural view of a molding die;
FIG. 4 is a schematic structural view of a platen assembly
Fig. 5 is a view of a lower oil delivery pipe equipped with a cross-shaped pipe.
In the figure, A1, an upper hydraulic cylinder; a2, a lower hydraulic cylinder; 1. a first compression bar; 2. a column; 3. a connecting block; 4. a cylindrical pressure head; 5. an upper oil delivery pipe; 51. a lower oil delivery pipe; 6. a first seal ring; 13. a nut; 14. a second compression bar;
B. a forming die; 7. a third mold; 8. an upper cover plate; 9. a second mold; 10. a first mold; 11. an air inlet pipe; 12. a lower cover plate; 15. A second seal ring; 16. a third briquetting; 17. a second briquetting; 18. and a first briquetting.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1 and 2, the invention comprises an upper hydraulic cylinder A1, a forming die B and a lower hydraulic cylinder A2 which are sequentially arranged from top to bottom; the upper hydraulic cylinder A1, the forming die B and the lower hydraulic cylinder A2 are fixed on at least two symmetrical upright posts 2,
the forming die B comprises a shell, an upper cover plate 8 and a lower cover plate 12, wherein the shell is fixed at the middle section of the upright post 2, the upper cover plate 8 and the lower cover plate 12 are covered on the upper surface and the lower surface of the shell and are sealed by a second sealing ring 15, lugs at the edge of the cover plate are sleeved on the upright post in a sliding way and are compressed by nuts, and a first die 10 is embedded in the shell; as shown in fig. 3, the first mold 10 is internally embedded with the second mold 9, and the second mold 9 is internally embedded with the third mold 7;
the first compression bar 1 of the upper hydraulic cylinder extends downwards into the upper part of the forming die B through the perforation of the upper cover plate 8; the second pressure rod 14 of the lower hydraulic oil cylinder extends upwards into the lower part of the forming die B through the perforation of the lower cover plate 12, the first pressure rod 1 and the second pressure rod 14 are coaxially arranged, and the first sealing ring 6 is arranged in the perforation of the upper cover plate 8 and the perforation of the lower cover plate 12; the side wall of the forming die B is provided with an air inlet pipe 11 communicated with an adsorption air source.
The shell of the forming die B is a cylinder body with the diameter of 50cm and the height of 30 cm; as shown in fig. 3, the first mold 10 is a slot cylinder with a diameter of 40cm and a height of 25 cm; the second die 9 is a notch cube with the length of 20cm multiplied by the width of 20cm multiplied by the height of 25 cm; the third die 7 is used for closing two core plates, wherein the length of each core plate is 10cm, the width of each core plate is 5cm, the height of each core plate is 25cm, the top surface of each core plate is provided with a semicircular column groove with the radius of 2.5cm and the depth of 10cm, and the lower bottom surfaces of the two core plates are provided with square grooves with the length of 5cm, the width of 2.5cm and the height of 10 cm; after the two core plates are assembled, the upper top surface synthesizes a cylindrical groove with the bottom surface diameter of 5cm and the height of 10 cm; the two core plates are turned over and combined into a square groove with the bottom surface of 5 multiplied by 5cm and the height of 10cm, and the square groove is matched with a third pressing plate.
The two core plates of the third die 7 are turned over to form a square groove die cavity by combining the two core plates, a cuboid sample with the length of 5 multiplied by 10cm can be pressed, the upper hydraulic cylinder A1 is combined with the pressing plate for active pressing, and the lower hydraulic cylinder A2 is matched and fixed in an auxiliary mode.
As shown in fig. 1 and 4, an upper hydraulic cylinder A1 is fixedly mounted at the top end of the upright column by a nut 13, a first compression bar 1 of the upper hydraulic cylinder further comprises a connecting block 3 and a cylindrical pressure head 4, the first compression bar 1 is connected with the cylindrical pressure head 4 through the connecting block 3, the cylindrical pressure head 4 penetrates through an upper cover plate 8, an upper oil delivery pipe 5 is communicated with a central hole of the cylindrical pressure head 4, and a lower oil delivery pipe 51 is connected with a central hole of the bottom surface of the cylindrical pressure head 4.
As shown in fig. 5, the lower oil delivery pipe 51 is detachably attached with a cross-shaped pipe having a length of 8cm, and spray nozzles are provided at the ends of the cross-shaped pipe to extend into the forming die B. The cross pipeline is suitable for the mold cavity of 20cm multiplied by 20cm, the oil delivery pipe at the lower part of the straight pipe can not uniformly spray lubricating oil on the inner surface of the square forming mold, and the cross is more uniform.
As shown in fig. 4 and 5, a lower oil delivery pipe 51 connected to the bottom surface of the cylindrical pressure head 4 is sleeved with a pressure plate assembly matched with the forming mold, the pressure plate assembly comprises a first pressure plate 18, a second pressure plate 17 and a third pressure plate 16, the first pressure plate 18 is nested with the second pressure plate 17 in an inner frame, the second pressure plate 17 is nested with the third pressure plate 16 in an inner frame, and a groove on the top surface of the third pressure plate is matched with the cylindrical pressure head 4. The pressing plate components are overlapped together and can be detached, and the pressing plate with corresponding size is selected to be matched with the die cavity of the forming die B during use. The three pressing plates are matched with the three square die cavities of the forming die B, and the cylindrical pressing head 4 is matched with a cylindrical groove after the die assembly of the third die 7. The upper hydraulic cylinder A1 provides acting force downwards through a cylindrical pressing head, the cylindrical pressing head is attached to a pressing plate, the acting force is transmitted to the pressing plate with the corresponding size selected below, the pressing plate is directly contacted with crushed coal rock materials, and the pressing plate is pressed and formed.
The diameter of the bottom surface of the cylindrical pressing head 4 is 5cm, the first pressing plate 18 is a square with the length of 20cm multiplied by the width of 20cm multiplied by the height of 3cm, and a square groove with the side length of 10cm and the depth of 2mm is formed above the first pressing plate to be matched with the second pressing plate; the second pressing plate 17 is a square with the length of 10cm multiplied by the width of 10cm multiplied by the height of 3cm, and a square groove with the side length of 5cm and the depth of 2mm is formed above the second pressing plate to be matched with the third pressing plate; the third pressing plate 16 is a square block with the length of 5cm multiplied by the width of 5cm multiplied by the height of 3cm, and a right circular groove with the diameter of 5cm and the depth of 2mm is formed above the third pressing plate to be matched with a cylindrical pressing head; all the platen central openings allow the lower oil delivery pipe 51 to pass through.
The lower hydraulic cylinder A2 is fixedly arranged at the bottom end of the upright post by a nut 13; the function of the lower hydraulic cylinder A2 and the second presser 14 is: 1. only the pressing of the upper hydraulic cylinder A1 can cause the loosening of the lower part of a coal sample with the size of 20cm multiplied by 20cm, so that the lower hydraulic cylinder A2 is required to exert force mutually; 2. after the coal sample is made, the lower hydraulic cylinder A2 is needed to jack the die.
The process for preparing the coal rock test sample by using the device comprises the following steps:
step 1, selecting and assembling matched forming dies, and selecting sample manufacturing dies with the required experimental size for assembling, wherein a third die is provided with an inner cavity for preparing a cylindrical sample with the diameter of 5cm multiplied by 10cm and a cuboid sample with the length of 5cm multiplied by 10cm, a first die is provided with an inner cavity for preparing a cubic coal rock sample with the length of 20cm multiplied by 20cm, and a second die is provided with an inner cavity for preparing a cubic coal rock sample with the length of 10cm multiplied by 25 cm;
step 2, installing a pressing plate assembly, an upper oil delivery pipe and a lower oil delivery pipe, selecting a pressing plate corresponding to a die to be installed on the bottom surface of a cylindrical pressing head, and connecting the corresponding oil delivery pipe to uniformly spray a small amount of oil to the inner wall of the die;
step 3, loose coal dust or rock powder required by the prepared experiment is put into a mould, the lower oil delivery pipe is utilized to stir the material uniformly, and the lower oil delivery pipe is taken down;
and 4, fixing the upper cover plate and the lower cover plate by nuts, and filling the adsorption gas from the gas filling holes to stabilize the pressure to 1MPa and stabilizing for 30min.
And 5, pressurizing the two sides of the upper pressing plate and the lower pressing plate by using the upper hydraulic oil cylinder and the lower hydraulic oil cylinder, so that the pressed coal and rock sample is formed by adopting constant-pressure pressing or displacement control according to experimental requirements.
And 6, releasing gas, opening an upper cover plate, ejecting the sample out of the die by using a lower hydraulic cylinder, and completing sampling and preparation of the gas-containing sample.
Claims (3)
1. The utility model provides a gas sample preparation facilities of coal petrography experiment which characterized in that: comprises an upper hydraulic cylinder (A1), a forming die (B) and a lower hydraulic cylinder (A2) which are sequentially arranged from top to bottom; the upper hydraulic oil cylinder (A1), the forming die (B) and the lower hydraulic oil cylinder (A2) are fixed on at least two symmetrical upright posts (2);
the forming die (B) comprises a shell, an upper cover plate (8) and a lower cover plate (12), wherein the shell is fixed at the middle section of the upright post (2), the upper cover plate (8) and the lower cover plate (12) are covered on the upper surface and the lower surface of the shell and sealed by a second sealing ring (15), lugs at the edge of the cover plate are sleeved on the upright post (2) in a sliding manner and are tightly pressed by nuts, a first die (10) is embedded in the shell, a second die (9) is embedded in the first die (10), and a third die (7) is embedded in the second die (9);
the first compression bar (1) of the upper hydraulic cylinder extends downwards into the upper part of the forming die (B) through the perforation of the upper cover plate (8); a second pressure rod (14) of the lower hydraulic oil cylinder extends upwards into the lower part of the forming die (B) through a perforation of the lower cover plate (12), the first pressure rod (1) and the second pressure rod (14) are coaxially arranged, and a first sealing ring (6) is arranged in the perforation of the upper cover plate (8) and the perforation of the lower cover plate (12); an air inlet pipe (11) is arranged on the side wall of the forming die (B) and is communicated with an adsorption air source;
the shell of the forming die (B) is a cylinder; the first die (10) is a notch cylinder, the second die (9) is a notch cube, two core plates of the third die (7) are assembled, a semicircular column groove is formed in the top surface of each core plate, square grooves are formed in the lower bottom surfaces of the two core plates, after the two core plates are assembled, the upper top surface is combined into a cylindrical groove, the two core plates are turned over and combined into a square groove die cavity, an upper hydraulic cylinder is combined with a pressing plate for active pressing, and a lower hydraulic cylinder is matched and fixed in an auxiliary manner;
the first compression bar (1) of the upper hydraulic cylinder further comprises a connecting block (3) and a cylindrical pressure head (4), the first compression bar (1) is connected with the cylindrical pressure head (4) through the connecting block (3), the cylindrical pressure head (4) penetrates through the upper cover plate (8), the upper oil delivery pipe (5) is communicated with a central hole of the cylindrical pressure head (4), and the central hole of the bottom surface of the cylindrical pressure head (4) is connected with the lower oil delivery pipe (51);
the lower oil delivery pipe (51) is detachably connected with a cross-shaped pipeline, and spray nozzles are arranged at the end parts of the cross-shaped pipeline and extend into the forming die (B);
the lower part oil delivery pipe (51) that cylinder pressure head (4) bottom surface is connected wears to overlap to have with forming die complex clamp plate subassembly, clamp plate subassembly is including first clamp plate (18), second clamp plate (17) and third clamp plate (16), first clamp plate (18) inside casing nested second clamp plate (17), second clamp plate (17) inside casing nested third clamp plate (16), third clamp plate top surface recess agrees with cylinder pressure head (4), three clamp plates cooperate with forming die B's three square die cavity, cylinder pressure head (4) cooperate with the cylinder groove after the compound die of third mould (7).
2. The gas-containing sample preparation device for coal rock experiments according to claim 1, wherein the gas-containing sample preparation device is characterized in that: the shell of the forming die (B) is a cylinder body with the diameter of 50cm and the height of 30 cm; the first die (10) is a notch cylinder with the diameter of 40cm and the height of 25cm, the second die (9) is a notch cube with the length of 20cm, the width of 20cm and the height of 25cm, the third die (7) is used for clamping two core plates, the length of 10cm, the width of 5cm and the height of 25cm are respectively used for clamping two core plates, semicircular column grooves with the radius of 2.5cm and the depth of 10cm are respectively formed in the top surface of each core plate, square grooves with the length of 5cm, the width of 2.5cm and the height of 10cm are respectively formed in the bottom surface of the two core plates, after the two core plates are clamped, cylindrical grooves with the diameter of 5cm and the height of 10cm are respectively formed in the upper top surface of the two core plates, and the two core plates are combined into square grooves with the bottom surface of 5cm, the bottom surface of 5cm and the height of 10cm are respectively used for overturning.
3. The gas-containing sample preparation device for coal rock experiments according to claim 1, wherein the gas-containing sample preparation device is characterized in that: the diameter of the bottom surface of the cylindrical pressing head (4) is 5cm, the first pressing plate (18) is a square with the length of 20cm multiplied by the width of 20cm multiplied by the height of 3cm, and a square groove with the side length of 10cm and the depth of 2mm is formed above the first pressing plate (18) to be matched with the second pressing plate; the second pressing plate (17) is a square with the length of 10cm multiplied by the width of 10cm multiplied by the height of 3cm, and a square groove with the side length of 5cm and the depth of 2mm is formed above the second pressing plate (17) to be matched with the third pressing plate; the third pressing plate (16) is a square block with the length of 5cm multiplied by the width of 5cm multiplied by the height of 3cm, and a right circular groove fit cylindrical pressing head (4) with the diameter of 5cm and the depth of 2mm is arranged above the third pressing plate (16); all the central openings of the pressing plates can pass through the lower oil delivery pipe (51).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010489876.2A CN111579342B (en) | 2020-06-02 | 2020-06-02 | Gas-containing sample preparation device for coal rock experiment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010489876.2A CN111579342B (en) | 2020-06-02 | 2020-06-02 | Gas-containing sample preparation device for coal rock experiment |
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| CN111579342A CN111579342A (en) | 2020-08-25 |
| CN111579342B true CN111579342B (en) | 2023-08-22 |
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| CN115508217B (en) * | 2022-08-12 | 2024-06-11 | 山东大学 | Multifunctional testing machine and method capable of realizing vacuum hot pressing and gas adsorption |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200988297Y (en) * | 2006-12-08 | 2007-12-12 | 群康科技(深圳)有限公司 | Rubber frame forming mould |
| CN105784450A (en) * | 2016-05-17 | 2016-07-20 | 重庆大学 | Manufacturing device and method for test pieces for coal rock engineering simulation experiment |
| CN205786005U (en) * | 2016-06-02 | 2016-12-07 | 河南理工大学 | A kind of for preventing the device of crack damage in moulded coal pressing process |
| CN106593369A (en) * | 2016-12-08 | 2017-04-26 | 重庆大学 | Simulating test method of CH4 layered displacement by CO2 in multi-layer superposed gas-containing system |
| CN108693315A (en) * | 2018-05-30 | 2018-10-23 | 中国矿业大学 | Multifunctional high-temperature high pressure displacement in situ and mining simulation experiment system and test method |
| CN108709783A (en) * | 2018-05-17 | 2018-10-26 | 长江大学 | Artificial cores preparation facilities and preparation method thereof |
| WO2020029606A1 (en) * | 2019-03-15 | 2020-02-13 | 山东科技大学 | Controllable joint-type rock-like casting mould apparatus and usage method |
-
2020
- 2020-06-02 CN CN202010489876.2A patent/CN111579342B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200988297Y (en) * | 2006-12-08 | 2007-12-12 | 群康科技(深圳)有限公司 | Rubber frame forming mould |
| CN105784450A (en) * | 2016-05-17 | 2016-07-20 | 重庆大学 | Manufacturing device and method for test pieces for coal rock engineering simulation experiment |
| CN205786005U (en) * | 2016-06-02 | 2016-12-07 | 河南理工大学 | A kind of for preventing the device of crack damage in moulded coal pressing process |
| CN106593369A (en) * | 2016-12-08 | 2017-04-26 | 重庆大学 | Simulating test method of CH4 layered displacement by CO2 in multi-layer superposed gas-containing system |
| CN108709783A (en) * | 2018-05-17 | 2018-10-26 | 长江大学 | Artificial cores preparation facilities and preparation method thereof |
| CN108693315A (en) * | 2018-05-30 | 2018-10-23 | 中国矿业大学 | Multifunctional high-temperature high pressure displacement in situ and mining simulation experiment system and test method |
| WO2020029606A1 (en) * | 2019-03-15 | 2020-02-13 | 山东科技大学 | Controllable joint-type rock-like casting mould apparatus and usage method |
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