Coal lithofacies detection device and method

Abstract

The invention discloses a coal lithofacies detection device and method, and relates to the technical field of maceral detection, the coal lithofacies detection method comprises the steps of coal rock X-ray plate preparation and microscopic observation, in the coal rock X-ray plate preparation step, crushing, screening, mixing, shaping and surface treatment are performed on a coal sample to form a coal rock X-ray plate; in the microscopic observation step, microscopic components and mineral substances in the coal rock polished section are observed and analyzed to judge the lithofacies type of the coal. According to the coal lithofacies detection device and method provided by the invention, the metamorphism degree, the combustion characteristic, the chemical reactivity, the processability and the like of coal are evaluated by analyzing the maceral components, the mineral components and the contents of the maceral components and the mineral components of the coal; in the coking process, coal blending is carried out based on the lithofacies of the coal, so that the proportions of different coal types can be more accurately blended, the optimal coal blending scheme is selected, combustion is more economical and effective, the calorific value of the coal and the yield of coke are increased, and the ash content and the sulfur content of the coke are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of microscopic component detection, and in particular to a coal petrographic detection device and method. Background Art

[0002] In coal petrology, coal is considered to be composed of a variety of different microscopic components. These microscopic components lead to differences in coal's appearance, optical properties and microstructure, which in turn lead to differences in coal's physical, chemical and process properties.

[0003] For example, the patent document entitled "A Method for Observing Microscopic Components of High-Rank Coal," with authorization publication number CN103217381B and publication date April 27, 2016, includes the following steps: placing a selected lump of coal on a piece of paper; photographing the lump of coal using a photographic device; and combining microscopic and submicroscopic observations to determine the signatures and relative contents of the coal's microscopic components. This patent, combined with microscopic observations, effectively and continuously identifies the submicroscopic distribution characteristics of high-rank coal's microscopic components, determines the spatial contact relationships of the components, and improves the efficiency of coal composition observation.

[0004] The lithologic composition of coal is relatively complex and has obvious heterogeneity, which has a profound impact on coal quality as well as its combustion and processing utilization. Summary of the Invention

[0005] The purpose of the present invention is to provide a coal petrographic detection device and method to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A coal petrographic detection method, comprising:

[0008] Coal rock slice preparation, which involves crushing, screening, mixing, shaping and surface treatment of coal samples to form coal rock slices;

[0009] Microscopic observation: observe and analyze the microscopic components and minerals in the coal rock sections to determine the petrographic type of the coal.

[0010] A coal petrographic detection device is used to implement the surface treatment step in the above-mentioned coal petrographic detection method, comprising a main body and a lifting platform, wherein the main body is provided with a grinding station and a polishing station, and the lifting platform is provided with a limiting disk for limiting the coal rock light film.

[0011] The above-mentioned coal petrographic detection device, the limiting disk includes a fixed disk limited on the lifting platform and a movable disk placed on the grinding station, the movable disk is constructed with a plurality of placement grooves adapted to the coal rock light sheet, the placement groove is slidably connected with a limiting plate, and the movable disk is provided with a first elastic member for forcing the limiting plate to approach the placement groove.

[0012] In the above-mentioned coal petrographic detection device, a connecting groove communicating with the placement groove is constructed on the movable disk, and the limiting plate is slidably connected in the connecting groove.

[0013] In the above-mentioned coal petrographic detection device, a protrusion is constructed on the movable disk, and two ends of the first elastic member are respectively fixed to the protrusion and the limiting plate.

[0014] In the above-mentioned coal petrographic detection device, the top of the placement tank is constructed to be open.

[0015] In the above-mentioned coal petrographic detection device, a first trapezoidal portion is constructed on the limiting plate, a movable groove is constructed on the fixed disk, and a second trapezoidal portion is constructed in the movable groove.

[0016] In the above-mentioned coal rock phase detection device, when the lifting platform descends, the first trapezoidal part relatively enters the movable groove. During the process, the first trapezoidal part approaches the second trapezoidal part under the action of the first elastic member. In the process of the first trapezoidal part crossing the second trapezoidal part, the limiting plate first moves away from the placement groove and then approaches the placement groove to limit the coal rock light sheet.

[0017] In the above-mentioned coal petrographic detection device, when the first trapezoidal portion passes over the second trapezoidal portion, the relative positions of the fixed plate and the movable plate can be restricted by the first trapezoidal portion and the second trapezoidal portion.

[0018] In the above-mentioned coal rock phase detection device, vertical surfaces are constructed on the first trapezoidal part and the second trapezoidal part. When the lifting platform descends, the first trapezoidal part contacts the second trapezoidal part under the action of the first elastic member until the vertical surface of the first trapezoidal part exceeds the vertical surface of the second trapezoidal part. The lifting platform stops descending. At this time, the first elastic member forces the first trapezoidal part to pass over the second trapezoidal part, thereby driving the movable disk to rise and then forcing the limiting plate to contact the coal rock light sheet, so that the bottom end of the coal rock light sheet is exposed from the movable disk.

[0019] In the above technical solution, the present invention provides a coal petrographic detection device and method, which evaluates the degree of metamorphism, combustion characteristics, chemical reactivity and processing performance of coal by analyzing the microscopic components, mineral components and their contents of coal; in the coking process, coal blending based on the coal's petrographic phase can more accurately adjust the proportion of different types of coal, select the best coal blending scheme, make combustion more economical and efficient, help to improve the calorific value of coal and coke production, and reduce the ash and sulfur content of coke. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of a restriction disk provided in another embodiment of the present invention;

[0023] Figure 3 A schematic diagram of a movable disk structure provided by another embodiment of the present invention;

[0024] Figure 4 A schematic structural diagram of a first trapezoidal portion provided in yet another embodiment of the present invention;

[0025] Figure 5 A schematic structural diagram of a second trapezoidal portion provided in yet another embodiment of the present invention;

[0026] Figure 6 A schematic diagram of a limiting plate structure provided in another embodiment of the present invention;

[0027] Figure 7 A schematic diagram of the structure of a raised portion provided in another embodiment of the present invention;

[0028] Figure 8 A schematic diagram of the structure of a fixed disk provided in yet another embodiment of the present invention;

[0029] Figure 9 A schematic diagram of the brake plate structure provided in yet another embodiment of the present invention;

[0030] Figure 10 A schematic diagram of the wedge-shaped portion structure provided in yet another embodiment of the present invention;

[0031] Figure 11 A schematic diagram of a sliding rod structure provided in yet another embodiment of the present invention;

[0032] Figure 12 A schematic diagram of the interference rod structure provided in yet another embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Main body; 2. Lifting platform; 3. Limiting plate; 31. Fixed plate; 32. Movable plate; 4. Grinding plate; 5. Polishing plate; 6. Lifting rod; 7. Placement groove; 8. Limiting plate; 9. First elastic member; 10. Protrusion; 11. First trapezoidal portion; 12. Second trapezoidal portion; 13. Vertical surface; 14. Sliding rod; 15. Interference rod; 16. Second elastic member; 17. Braking plate; 18. Wedge-shaped portion; 19. Friction portion; 20. Third elastic member. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] Reference Figure 1-12 An embodiment of the present invention provides a coal petrographic detection method, including coal rock section preparation and microscopic observation steps. In the coal rock section preparation step, the coal sample is crushed, screened, mixed, shaped and surface-treated to form a coal rock section; in the microscopic observation step, the microscopic components and minerals in the coal rock section are observed and analyzed to determine the petrographic type of the coal carbon.

[0037] Specifically, the composition of coal is an important characteristic of coal and is of great significance for understanding the nature, origin and utilization of coal. Through microscopic observation or chemical analysis and other methods, the composition of coal can be studied and calculated in detail. In the existing technology, the microscopic detection system of coal generally includes a surface treatment device and a limit observation device for the coal rock film, which is convenient for direct observation after the coal rock film is processed. However, the existing technology generally only observes the microscopic components of coal and ignores the mineral components in the coal. The innovation of the embodiment of the present invention is that in the step of preparing coal rock slices, the collected coal samples are crushed, screened and mixed, and the mixed coal samples are placed in a mold for shaping (such as the patent with application number 2024117986469, entitled A method for preparing coal rock slices, which records a method for preparing coal rock slices). The shaped coal samples are generally cylindrical or flaky, and then the ends of the coal samples are surface-treated (grinded and polished) to form coal rock slices; in the step of microscopic observation, the prepared coal rock slices are observed and analyzed under a microscope to identify the microscopic components (such as vitrinite, inertinite and exinite, etc., the determination of microscopic components is an existing technology, such as reflected light, transmitted light and fluorescence, etc., which are not described in detail here) and mineral components (such as limestone, pyrite, quartz, etc., the determination of mineral components is an existing technology, such as reflected light, transmitted light and fluorescence, etc., which are not described in detail here), by revealing the microscopic components of the coal. The composition, mineral components and their contents in the coal can be analyzed to evaluate the degree of metamorphism, combustion characteristics, chemical reactivity and processing performance of the coal; based on the contents of the microscopic components and mineral components in the coal, the coal can be divided into different lithologic types, such as vitrinite coal (i.e., the coal contains a large amount of vitrinite), inertinite coal (i.e., the coal contains a large amount of inertinite), and exosite coal (i.e., the coal contains a large amount of exosite), etc.; the advantage of such a setting is that after analyzing the types and contents of the microscopic components and mineral components in the coal, the appropriate utilization method and equipment can be selected according to the lithologic phase, combustion characteristics and chemical reactivity of the coal, and in the process of using coal for coking, the proportion of different coal types can be more accurately adjusted by blending based on the lithologic phase of the coal, and the best coal blending scheme can be selected to make combustion more economical and efficient, which is helpful to improve the calorific value of the coal and the coke yield, and the ash and sulfur content of the coke can be effectively reduced by regulating the coal blending ratio based on the content of the mineral components in the coal.

[0038] In another embodiment of the present invention, a coal petrographic detection device is provided, which is used to implement the coal rock slice surface treatment step in the above-mentioned coal petrographic detection method, including a main body 1 and a lifting platform 2. The main body 1 is provided with a grinding station and a polishing station, and the lifting platform 2 is provided with a limiting disk 3 for limiting the coal rock slice. Specifically, a grinding disk 4 and a polishing disk 5 are rotatably connected to the main body 1 (two power sources can be provided on the main body 1 to respectively drive the grinding disk 4 and the polishing disk 5 to rotate. This is a prior art and will not be described here). The grinding disk 4 is at the grinding station, and the polishing disk 5 is at the polishing station. Sandpaper can be provided on the grinding disk 4 to grind the coal rock slice, and polishing cloth can be provided on the polishing disk 5 to polish the ground coal rock slice; a lifting slot is constructed on the main body 1, and a lifting rod 6 adapted thereto is provided in the lifting slot. The lifting platform 2 is fixed to the top of the lifting rod 6. Such a configuration enables the lifting rod 6 to be able to The lifting platform 2 is lifted or rotated in the lifting groove, thereby driving the lifting platform 2 to lift or rotate. A locking structure can be set on the main body 1 to lock the height and angle of the lifting rod 6, so that the user can manually adjust the height and angle of the lifting rod 6; a lifting mechanism and a rotating mechanism can also be set on the main body 1 to drive the lifting rod 6 to lift and rotate (the lifting mechanism can use the cylinder structure in the existing technology, and the rotating mechanism can use the motor structure in the existing technology. The combination of the two is the existing technology and is not described here and is not shown in the figure); a clamping claw structure can be set on the limiting disk 3 to clamp the coal rock light sheet. The advantage of such a setting is that after the coal rock slice is restricted by the limiting disk 3, the limiting disk 3 is driven by the lifting rod 6 and the lifting platform 2 to move to the grinding disk 4 for grinding (the grinding disk 4 can be rotated relative to the coal rock slice for grinding), and then the limiting disk 3 is driven by the lifting rod 6 to move to the polishing disk 5 for polishing (the polishing disk 5 can be rotated relative to the coal rock slice for polishing), so that the surface of the end of the coal rock slice remains flat, without protrusions and dents, so that the boundary line between the microscopic group and the mineral component is clearly displayed, which is convenient for the determination of the petrographic phase of the coal.

[0039] As an alternative to providing a clamping claw on the above-mentioned limiting plate 3 to limit the position of the coal rock light sheet, preferably, the limiting plate 3 includes a fixed plate 31 limited on the lifting platform 2 and a movable plate 32 placed on the grinding station, and the movable plate 32 is constructed with a plurality of placement grooves 7 adapted to the coal rock light sheet, and a limiting plate 8 is slidably connected in the placement groove 7, and the movable plate 32 is provided with a first elastic member 9 for forcing the limiting plate 8 to approach the placement groove 7. Specifically, a rotating structure (not shown) can be provided on the lifting platform 2 to drive the fixed disk 31 to rotate on the lifting platform 2, thereby cooperating with the grinding disk 4 or the polishing disk 5 to improve the efficiency of surface treatment; the inner diameter of the placement groove 7 is slightly larger than the outer diameter of the coal rock light sheet, so that multiple coal rock light sheets can be placed in multiple placement grooves 7 respectively; the first elastic member 9 can use an elastic telescopic rod or spring structure in the existing technology to force the limiting plate 8 to approach the placement groove 7 through the first elastic member 9, thereby resisting the coal rock light sheet in the placement groove 7 through the limiting plate 8, thereby limiting the position of the coal rock light sheet; a clamping structure can be provided between the fixed disk 31 and the movable disk 32 to limit the relative position of the fixed disk 31 and the movable disk 32 after multiple coal rock light sheets are placed in the movable disk 32, so that the movable disk 32 can move with the lifting platform 2 and the fixed disk 31 to simultaneously perform surface treatment on multiple coal rock light sheets. The advantage of such a setting is that the coal rock sheet can be passively restricted in the placement groove 7 through the limiting plate 8, and then the relative position of the fixed disk 31 and the movable disk 32 can be restricted to drive multiple coal rock sheets to move through the lifting platform 2, so as to move multiple coal rock sheets to the grinding station or polishing station for surface treatment, thereby effectively improving the efficiency of the surface treatment of the coal rock sheet.

[0040] Preferably, the movable disk 32 is configured with a connecting groove that communicates with the placement groove 7, and the limiting plate 8 is slidably connected within the connecting groove. The movable disk 32 is configured with a protrusion 10, and the ends of the first elastic member 9 are respectively fixed to the protrusion 10 and the limiting plate 8. The top of the placement groove 7 is configured to be open. Specifically, the movable disk 32 is constructed with multiple connecting grooves, and the multiple connecting grooves are respectively connected to the multiple placement grooves 7. A limiting plate 8 is slidably connected in a connecting groove, and the limiting plate 8 has a certain sliding stroke in the connecting groove, so that the limiting plate 8 can approach or move away from the placement groove 7 along the connecting groove (that is, the limiting plate 8 can move into the placement groove 7 to interfere with the coal rock light sheet or be retracted into the connecting groove to relieve the interference with the coal rock light sheet); the protrusion 10 is arranged along the central axis of the movable disk 32, and there are multiple groups of first elastic members 9. The first elastic member 9 is preferably a spring structure, one end of which is fixed on the outer wall of the protrusion 10, and the other end is fixed on the corresponding limiting plate 8, so as to force the limiting plate 8 to move into the placement groove 7 through the first elastic member 9; the limiting plate 8 is constructed in an arc shape on the side close to the placement groove 7, and the top of the limiting plate 8 is constructed as a chamfered structure to match the opening at the top of the placement groove 7, so as to facilitate the placement of the coal rock light sheet into the placement groove 7. The advantage of such a setting is that the coal rock light sheet can abut the limiting plate 8 when placed in the placement groove 7, so that the limiting plate 8 moves into the connecting groove until the coal rock light sheet is placed in the placement groove 7. The limiting plate 8 abuts against the outer wall of the coal rock light sheet under the action of the first elastic member 9 to limit the position of the coal rock light sheet.

[0041] As an alternative to the above-mentioned method of limiting the relative position of the fixed disk 31 and the movable disk 32 by the clamping structure, it is preferred that a first trapezoidal portion 11 is constructed on the limiting plate 8, a movable groove is constructed on the fixed disk 31, and a second trapezoidal portion 12 is constructed in the movable groove. When the lifting platform 2 descends, the first trapezoidal portion 11 relatively enters the movable groove. During the process, the first trapezoidal portion 11 approaches the second trapezoidal portion 12 under the action of the first elastic member 9. In the process of the first trapezoidal portion 11 passing over the second trapezoidal portion 12, the limiting plate 8 first moves away from the placement groove 7 and then approaches the placement groove 7 to limit the coal rock light sheet. When the first trapezoidal portion 11 passes over the second trapezoidal portion 12, the relative position of the fixed disk 31 and the movable disk 32 can be limited by the first trapezoidal portion 11 and the second trapezoidal portion 12. Specifically, in this embodiment, the cross-section of the protrusion 10 is polygonal (if there are six placement grooves 7, the cross-section of the protrusion 10 is hexagonal), and the movable groove is configured to be a shape that matches the protrusion 10 and can be inserted and moved by the first trapezoidal portion 11 (the shape of the movable groove is as follows Figure 8As shown), after multiple coal rock light sheets are placed in the movable disk 32, the protrusion 10 is aligned with the movable groove and the lifting rod 6 is driven to descend so that the protrusion 10 is relatively inserted into the movable groove; the cross-sections of the first trapezoidal portion 11 and the second trapezoidal portion 12 are both constructed as trapezoids, both of which have a plane (vertical plane), and both sides of the plane are connected with inclined surfaces (that is, a parallel side and two inclined sides of the trapezoid); the first trapezoidal portion 11 and the second trapezoidal portion 12 are arranged opposite to each other, and when the protrusion 10 relatively enters the movable groove, the first trapezoidal portion 11 moves into the movable groove with the protrusion 10, and the relative inclined surfaces on the first trapezoidal portion 11 and the second trapezoidal portion 12 will conflict with each other, thereby forcing the limiting plate 8 to overcome the elastic force of the first elastic member 9 and move away from the placement groove 7, thereby releasing the restriction on the coal rock light sheet in the placement groove 7 (as shown Figure 5 until the fixed disk 31 and the movable disk 32 approach each other to a certain distance, the first trapezoidal portion 11 relatively passes over the second trapezoidal portion 12, so that the limiting plate 8 can be reset under the action of the first elastic member 9, thereby again limiting the coal rock light sheet in the placement groove 7. At this time, the top of the protrusion 10 contacts the inner wall of the movable groove, and the second trapezoidal portion 12 is in the moving stroke of the first trapezoidal portion 11, so that the relative position of the fixed disk 31 and the movable disk 32 can be limited.

[0042] In this way, after multiple coal rock light sheets are placed in the corresponding placement grooves 7, the lifting platform 2 is driven down to make the fixed plate 31 close to the movable plate 32, so that the protrusion 10 is relatively inserted into the movable groove. During the process, the first trapezoidal portion 11 and the second trapezoidal portion 12 conflict with each other until the protrusion 10 conflicts with the inner wall of the movable groove, and the first trapezoidal portion 11 passes over the second trapezoidal portion 12 to limit the relative position of the fixed plate 31 and the movable plate 32 under the action of the first elastic member 9. During the process, the limiting plate 8 first moves away from the placement groove 7 and then approaches the placement groove 7. The advantage is that, in the process of the fixed disk 31 approaching the movable disk 32, the limiting plate 8 first moves away from the placement groove 7, so that the coal rock light sheet in the placement groove 7 can be attached to the grinding disk 4 or the polishing disk 5 under the action of gravity, and then the limiting plate 8 approaches the placement groove 7 to limit the position of the coal rock light sheet, and in the process of the limiting plate 8 approaching the placement groove 7, the first trapezoidal portion 11 passes over the second trapezoidal portion 12, so that the two can limit the relative position of the fixed disk 31 and the movable disk 32; after the surface treatment of the coal rock light sheet, manually limiting the position of the movable disk 32 and then driving the fixed disk 31 to rise can make the first trapezoidal portion 11 pass over the second trapezoidal portion 12 again (the interference of the inclined surfaces between the first trapezoidal portion 11 and the second trapezoidal portion 12 can overcome the action of the first elastic member 9, so that the first trapezoidal portion 11 is moved out of the movable groove), so as to release the restriction on the relative position of the fixed disk 31 and the movable disk 32.

[0043] Preferably, the first trapezoidal portion 11 and the second trapezoidal portion 12 are both constructed with a vertical surface 13. When the lifting platform 2 descends, the first trapezoidal portion 11 contacts the second trapezoidal portion 12 under the action of the first elastic member 9 until the vertical surface 13 of the first trapezoidal portion 11 passes over the vertical surface 13 of the second trapezoidal portion 12, and the lifting platform 2 stops descending. At this time, the first elastic member 9 forces the first trapezoidal portion 11 to pass over the second trapezoidal portion 12, so as to drive the movable disk 32 to rise and then force the limiting plate 8 to contact the coal rock light sheet, so that the bottom end of the coal rock light sheet is exposed from the movable disk 32. Specifically, in this embodiment, the vertical surface 13 is the plane in the above embodiment, that is, the first trapezoidal portion 11 and the second trapezoidal portion 12 are both constructed with a vertical surface 13, and both sides of the vertical surface 13 are connected with inclined surfaces; in this embodiment, in the process of the protrusion 10 relatively entering the movable groove, when the vertical surface 13 of the first trapezoidal portion 11 passes over the vertical surface 13 of the second trapezoidal portion 12 (such as Figure 6 As shown), an inclined surface of the first trapezoidal portion 11 and an inclined surface of the second trapezoidal portion 12 conflict with each other, and the lifting platform 2 stops descending. At this time, the first elastic member 9 continues to force the first trapezoidal portion 11 close to the second trapezoidal portion 12, thereby driving the protrusion 10 to continue to insert into the movable groove. During the process, the coal rock light sheet stays on the grinding disk 4 or the polishing disk 5, and the movable disk 32 moves upward relative to the coal rock light sheet until the top of the protrusion 10 conflicts with the inner wall of the movable groove. The limiting plate 8 conflicts with the coal rock light sheet again, so that the bottom end of the coal rock light sheet is exposed from the movable disk 32 and the position of the coal rock light sheet is limited (as shown). Figure 7 The advantage of such a configuration is that when the lifting platform 2 is controlled to descend so that the fixed plate 31 and the movable plate 32 are engaged with each other, the fixed plate 31 descends to a specified height so that the vertical surfaces 13 of the first trapezoidal portion 11 and the second trapezoidal portion 12 are intertwined, and then the lifting platform 2 stops descending. At this time, the first elastic member 9 will passively operate to drive the protrusion 10 to continue to be inserted into the movable groove, so that the movable plate 32 rises and is engaged with the fixed plate 31 through the first trapezoidal portion 11 and the second trapezoidal portion 12. At the same time, the first elastic member 9 can also drive the limiting plate 8 to limit the position of the coal rock light sheet, so that the coal rock light sheet keeps the bottom end exposed from the movable plate 32, which is convenient for subsequent surface treatment of the end of the coal rock light sheet and avoids contact between the movable plate 32 and the grinding plate 4 or the polishing plate 5 when the surface treatment of the end of the coal rock light sheet is performed.

[0044] In another embodiment provided by the present invention, further, a sliding rod 14 is slidably connected to the fixed disk 31, a resistance rod 15 is slidably connected to the sliding rod 14, and a second elastic member 16 is provided on the sliding rod 14 for forcing the resistance rod 15 away from the sliding rod 14, and a brake plate 17 is slidably connected inside the fixed disk 31, one end of the brake plate 17 is constructed as a wedge-shaped portion 18 and extends into the second trapezoidal portion 12, and the other end is constructed as a friction portion 19 and extends to the sliding rod 14, and a third elastic member 20 is provided inside the fixed disk 31 for forcing the brake plate 17 away from the sliding rod 14. Specifically, a slide groove is constructed on the fixed plate 31, and the slide rod 14 is slidably connected in the slide groove. A telescopic groove is constructed in the slide rod 14, and the interference rod 15 is slidably connected in the telescopic groove. The second elastic member 16 adopts a spring structure, one end of which is fixed on the inner wall of the telescopic groove, and the other end is fixed on the end head of the interference rod 15, so that the interference rod 15 is forced away from the slide rod 14 through the second elastic member 16; a connecting groove connected to the movable groove and the slide groove is constructed in the fixed plate 31, and the brake plate 17 is slidably connected in the connecting groove, and the third elastic member 20 adopts a spring structure, one end of which is fixed on the inner wall of the connecting groove, and the other end is fixed on the brake plate 17, so as to pass through the third elastic member 20 Force the brake plate 17 to move away from the slide bar 14; the friction portion 19 is located on the side of the brake plate 17 close to the slide bar 14, and the friction portion 19 is arc-shaped. When the brake plate 17 is close to the slide groove, the friction portion 19 can resist the outer wall of the slide bar 14 to limit the position of the slide bar 14; the second trapezoidal portion 12 is configured with an interlocking groove, and the wedge-shaped portion 18 passes through the interlocking groove and extends to the movable groove. Under the action of the third elastic member 20, the wedge-shaped portion 18 protrudes from the second trapezoidal portion 12. When the wedge-shaped portion 18 is retracted into the interlocking groove, the wedge-shaped portion 18 is smoothly connected to the outer wall (inclined surface) of the second trapezoidal portion 12. At this time, the friction portion 19 resists the slide bar 14 to limit the position of the slide bar 14.

[0045] In the above embodiment, the lifting platform 2 stops descending after descending to the specified height, and then the movable disk 32 is passively raised to engage with the fixed disk 31, and at the same time, the bottom end of the coal rock light sheet is exposed from the movable disk 32. Subsequently, when the bottom end of the coal rock light sheet is subjected to surface treatment, the lifting platform 2 needs to be lowered to force the coal rock light sheet to fit the grinding disk 4 or the polishing disk 5 for surface treatment. In this embodiment, a sliding rod 14, a second elastic member 16 and a resistance rod 15 are provided on the fixed disk 31. When the first trapezoidal portion 11 relatively enters the movable groove, the resistance rod 15 enters the placement groove 7 to resist the corresponding coal rock light sheet (such as Figure 10 Then the first trapezoidal portion 11 relatively enters the movable groove to resist the wedge-shaped portion 18, so as to force the wedge-shaped portion 18 close to the slide bar 14 until the first trapezoidal portion 11 moves to Figure 11When the first trapezoidal portion 11 is in the middle position, the wedge-shaped portion 18 is squeezed to be received in the connecting groove. During the process, the friction portion 19 limits the position of the slide bar 14. After the interference rod 15 contacts the coal rock light sheet, the fixed plate 31 and the movable plate 32 approach each other to enable the interference rod 15 and the slide bar 14 to rise along the slide groove until the position of the slide bar 14 is restricted. The second elastic member 16 is squeezed and the interference rod 15 is received in the telescopic groove. Then the first trapezoidal portion 11 continues to enter the movable groove and continues to contact the wedge-shaped portion 18 through the inclined surface until the protrusion 10 contacts the inner wall of the movable groove. During this process, the interference rod 15 is further received in the telescopic groove (as shown in FIG. Figure 12 shown).

[0046] With such an arrangement, the resistance rod 15 can first be allowed to resist the top of the corresponding coal rock light sheet under the action of gravity. As the fixed plate 31 and the movable plate 32 approach, the position of the slide rod 14 is first restricted, and then the resistance rod 15 is forced into the telescopic groove until the first trapezoidal part 11 and the second trapezoidal part 12 restrict the position of the fixed plate 31 and the movable plate 32, the movable plate 32 and the grinding plate 4 or the polishing plate 5 are separated, and the bottom end of the coal rock light sheet resists the grinding plate 4 or the polishing plate 5, and the resistance rod 15 resists the top of the coal rock light sheet under the action of the second elastic member 16. The advantage is that, in this embodiment, the interference rod 15 can adapt to coal rock light sheets of different heights. When the slide rod 14 is not restricted by the friction portion 19, the fixed plate 31 and the movable plate 32 approach each other, and the slide rod 14 also moves in the slide groove until all the interference rods 15 are in contact with the top of the corresponding coal rock light sheet (the height of the coal rock light sheet is within a certain range, and the situation of uneven interference force of multiple interference rods 15 is avoided as much as possible). The position of the slide rod 14 is restricted by the friction portion 19, and then the fixed plate 31 and the movable plate 32 are moved closer to each other. The plates 32 are close to each other, which compresses the second elastic member 16 to store elastic potential energy, so as to force the coal rock sheet to be close to the grinding plate 4 or the polishing plate 5 during the grinding or polishing process. That is, in this embodiment, after the lifting platform 2 is lowered to the specified height, the fixed plate 31 and the movable plate 32 are engaged with each other, and then the surface treatment of the multiple coal rock sheets in the movable plate 32 can be performed directly, and in the process, the second elastic member 16 can force the coal rock sheet to fit on the grinding plate 4 or the polishing plate 5, thereby improving the efficiency of the surface treatment of the coal rock sheet.

[0047] It should be noted that the elastic force of the first elastic member 9 is greater than the elastic force of the third elastic member 20, so that the first elastic member 9 can move the first trapezoidal portion 11 close to the second trapezoidal portion 12, so that the first trapezoidal portion 11 passes over the second trapezoidal portion 12 and resists the wedge-shaped portion 18 (such as Figure 12The friction portion 19 is preferably a deformable friction structure (such as a rubber friction pad). When the inclined surface of the first trapezoidal portion 11 contacts the wedge-shaped portion 18, the contact between the two may be loose, but the slight looseness does not affect the restriction of the friction portion 19 on the slide bar 14, and the slide bar 14 is prevented from moving freely in the slide groove as much as possible; the friction between the limiting plate 8 and the coal rock light sheet is less than the elastic force of the second elastic member 16, so that after the limiting plate 8 contacts the coal rock light sheet, the second elastic member 16 can force the coal rock light sheet to move along the placement groove 7 close to the grinding disc 4 or the polishing disc 5. ; In the process of the movable disk 32 moving from the grinding disk 4 to the polishing disk 5, the coal rock light sheet may be exposed from the placement groove 7 (that is, the second elastic member 16 forces the resistance rod 15 to resist the coal rock light sheet, so that the coal sample light sheet continues to be exposed from the placement groove 7), but after the movable disk 32 moves to the polishing disk 5, the fixed disk 31 and the movable disk 32 directly press downward to force the coal rock light sheet to be re-entered into the placement groove 7 and accept the elastic resistance of the resistance rod 15; and in the process, the limiting plate 8 can limit the coal rock light sheet to the corresponding placement groove 7.

[0048] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A coal petrographic detection method, characterized in that: include: Coal rock slice preparation, which involves crushing, screening, mixing, shaping and surface treatment of coal samples to form coal rock slices; Microscopic observation: observe and analyze the microscopic components and minerals in the coal rock sections to determine the petrographic type of the coal.

2. A coal petrographic detection device, used to implement the surface treatment step in the coal petrographic detection method described in claim 1, characterized in that: The utility model comprises a main body and a lifting platform, wherein the main body is provided with a grinding station and a polishing station, and the lifting platform is provided with a limiting disk for limiting the coal rock light sheet.

3. A coal petrographic detection device according to claim 2, characterized in that: The limiting plate includes a fixed plate limited on the lifting platform and a movable plate placed on the grinding station. The movable plate is constructed with a plurality of placement grooves adapted to the coal rock light sheet. A limiting plate is slidably connected in the placement groove. The movable plate is provided with a first elastic member for forcing the limiting plate to approach the placement groove.

4. A coal petrographic detection device according to claim 3, characterized in that: The movable disk is provided with a connecting groove which is in communication with the placement groove, and the limiting plate is slidably connected in the connecting groove.

5. The coal petrographic detection device according to claim 3, characterized in that: A protrusion is formed on the movable disk, and two ends of the first elastic member are respectively fixed to the protrusion and the limiting plate.

6. A coal petrographic detection device according to claim 3, characterized in that: The top of the placement groove is constructed to be open.

7. The coal petrographic detection device according to claim 3, characterized in that: A first trapezoidal portion is configured on the limiting plate, a movable groove is configured on the fixing plate, and a second trapezoidal portion is configured in the movable groove.

8. A coal petrographic detection device according to claim 7, characterized in that: When the lifting platform descends, the first trapezoidal portion relatively enters the movable groove. During the process, the first trapezoidal portion approaches the second trapezoidal portion under the action of the first elastic member. In the process of the first trapezoidal portion crossing the second trapezoidal portion, the limiting plate first moves away from the placement groove and then approaches the placement groove to limit the coal rock light sheet.

9. A coal petrographic detection device according to claim 8, characterized in that: When the first trapezoidal portion passes over the second trapezoidal portion, the relative positions of the fixed disk and the movable disk can be restricted by the first trapezoidal portion and the second trapezoidal portion.

10. The coal petrographic detection device according to claim 8, characterized in that: The first trapezoidal portion and the second trapezoidal portion are both constructed with vertical surfaces. When the lifting platform descends, the first trapezoidal portion contacts the second trapezoidal portion under the action of the first elastic member until the vertical surface of the first trapezoidal portion passes over the vertical surface of the second trapezoidal portion. The lifting platform stops descending. At this time, the first elastic member forces the first trapezoidal portion to pass over the second trapezoidal portion, thereby driving the movable disk to rise and then forcing the limiting plate to contact the coal rock light sheet, so that the bottom end of the coal rock light sheet is exposed from the movable disk.

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