Portable detection device for Hardgrove grindability index of coal

Abstract

The utility model discloses a portable detection device for Hardgrove grindability index of coal, the portable detection device is arranged in a box body, the box body comprises at least two cover plates which can be unfolded, a driving device, a support frame and a grinding device are arranged on a mounting plate, the grinding device comprises a grinding ring and a grinding bowl, the driving device comprises a liftable rack, and the support frame is arranged on the rack. A rotatable grinding ring is arranged at the end of the rack, a grinding bowl is arranged on the supporting frame, an opening of the grinding bowl faces upwards, a plurality of grinding balls are arranged in the grinding bowl, the grinding ring makes contact with the grinding balls when the portable detection device works, and the outer side of the upper portion of the grinding bowl is in pivot connection with the upper portion of the supporting frame. The mounting plate is further provided with a limiting and supporting assembly capable of limiting and supporting the bottom of the grinding bowl. Compared with the prior art, the whole detection device adopts a smaller design size and is arranged in a movable box body, so that the detection capability is ensured, the portability is very high, and the detection of detection personnel is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of coal characteristic detection technology, and in particular to a portable detection device for the Hardgrove grindability index of coal. Background Technology

[0002] The Hardgrove Grindability Index (HGA) tester is designed based on the grinding law. GB / T 2565-2014, "Determination of Grindability Index of Coal (Hardgrove Method)," is the only mandatory standard for HGA testing in China. It specifies the entire process from equipment requirements and sample preparation to result calculation, and is equivalent to the international standard ISO 5074:2008. The specific testing process includes placing the prepared coal sample (particle size 0.63~1.25mm) into a grinding bowl; grinding the coal sample with steel balls inside the bowl under a specified pressure; after grinding, sieving the coal sample through a sieve and weighing the sample that passes through the sieve; and then determining the HGA from a calibration chart drawn from a standard coal sample based on the mass of the sample that passes through the sieve.

[0003] Existing Hastings grindability index testers are mostly large, fixed-location devices. For some situations that require on-site testing, such devices obviously cannot meet the needs. Samples must be taken on-site and then brought back for testing. Therefore, it is necessary to design a testing device that can flexibly meet the needs of testing personnel. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by proposing a portable testing device for the Hardgrove grindability index of coal, which adopts the following technical solution.

[0005] A portable testing device for the Hardgrove grindability index of coal is disclosed. The portable testing device is housed in a box that is freely movable. The box contains a mounting plate and includes at least two unfoldable covers. The mounting plate is equipped with a drive device, a support frame, and a grinding device. The grinding device includes a grinding ring and a grinding bowl. The drive device includes a liftable frame with a rotatable grinding ring at one end. The support frame houses the grinding bowl, with its opening facing upwards. Multiple grinding balls are disposed within the grinding bowl. The grinding ring contacts the grinding balls during operation. The upper outer side of the grinding bowl is pivotally connected to the upper part of the support frame. The mounting plate also includes an electronic scale, a vibrating screen, and a limiting and supporting assembly for limiting and supporting the bottom of the grinding bowl.

[0006] Furthermore, the lifting frame includes a vertical frame and a horizontal frame, and a rotating motor is provided at the end of the horizontal frame, which is connected to the grinding ring.

[0007] Furthermore, when the portable testing device is working, a counterweight is installed on the horizontal frame, and a counterweight storage box is installed inside the box. When the portable testing device is not working, the counterweight is placed in the counterweight storage box.

[0008] Furthermore, the support frame includes two support plates arranged vertically relative to each other, and two connecting ears are provided on the upper outer side of the grinding bowl. The support plates are connected to the connecting ears of the grinding bowl by pins.

[0009] Furthermore, an air jet device is provided on the upper part of one of the support plates, the air jet device including a nozzle and a flexible air tube, and the box is also provided with an air pump.

[0010] Furthermore, the limiting support assembly includes a limiting support block and a locking device. The limiting support block is slidably mounted on the mounting plate via a slide rail. The bottom of the grinding bowl has a limiting groove arranged radially, and the limiting support block can slide into the limiting groove via the slide rail.

[0011] Furthermore, the locking device is securely connected to the slide rail by a set screw.

[0012] Furthermore, the box body is a rectangular box body, including a first cover and a second cover body rotatably mounted on the box body. The first cover and the second cover body are connected by a latch after being closed. The first cover and the second cover body are provided with handles.

[0013] Furthermore, the enclosure is equipped with a pull rod, rollers, and a power interface.

[0014] Furthermore, the mounting plate is provided with a vibrating screen that can slide relative to the grinding bowl, the vibrating screen has a screen mesh, and the mounting plate is also provided with an electronic scale.

[0015] The beneficial effects of this utility model are as follows: The detection device of this utility model integrates grinding, screening, and load-bearing devices into a movable box, which greatly facilitates the handling of the detection device, meets the on-site detection needs in some situations, and improves the convenience of operation; at the same time, the grinding bowl of this detection device adopts a rotatable design with the support, so the grinding bowl does not need to be disassembled when pouring the ground coal, making operation more convenient. In addition, a limiting support component with supporting and limiting functions is set at the bottom of the grinding bowl. Through the cooperation of the limiting support block and the limiting groove at the bottom of the grinding bowl, it can be ensured that the grinding bowl will not shake when subjected to the action of the grinding ring, and at the same time, it can bear the vertical force applied by the grinding ring; in addition, an air jet device is also set on the support frame for easy cleaning of the grinding bowl. The residual sample in the grinding bowl can be cleaned by blowing air. This utility model has the characteristics of convenient mobility, multiple functions, and convenient sample processing.

[0016] Other technical effects of this utility model are further illustrated in the embodiments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0018] Figure 1 The overall shape of the portable testing device of this utility model Figure 1 ;

[0019] Figure 2 The overall shape of the portable testing device of this utility model Figure 2 ;

[0020] Figure 3 The overall internal layout of the portable testing device of this utility model Figure 1 ;

[0021] Figure 4 The overall internal layout of the portable testing device of this utility model Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the internal structure of the portable testing device of this utility model;

[0023] Figure 6 This is a cross-sectional view of the grinding film device of the portable testing device of this utility model;

[0024] Figure 7 This is a structural diagram of the limiting support component of the portable detection device of this utility model;

[0025] Figure 8 This is a schematic diagram of one working state of the portable testing device of this utility model.

[0026] Explanation of reference numerals in the attached drawings: 10-box body; 11-first cover; 12-second cover; 13-counterweight storage box; 20-drive device; 30-grinding device; 31-grinding bowl; 32-grinding ring; 33-grinding ball; 40-limiting support assembly; 41-limiting support block; 42-locking device; 50-electronic scale; 60-vibrating screen; 70-counterweight block; 80-mounting plate; 90-support frame; 91-air jet device. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] It should be noted that all connection relationships mentioned in this article do not refer to direct connection of components, but rather to the ability to form a better connection structure by adding or removing connecting accessories according to specific implementation conditions. Where there is no conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other. Furthermore, the terms "first," "second," "upper end," "lower end," "inner end," and "outer end," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0029] A portable device for testing the Hardgrove grindability index of coal, such as Figures 1-8 As shown, the portable testing device is housed within a housing 10, which is freely movable and can be made entirely of metal. An installation plate 80 is provided inside the housing 10 and is fixedly connected to it. The housing 10 includes at least two unfoldable covers for opening the housing 10 and operating the internal equipment. A drive device 20, a support frame 90, and a grinding device 30 are mounted on the installation plate 80. The grinding device 30 includes a grinding ring 32 and a grinding bowl 31. The drive device 20 includes a liftable frame, with a rotatable grinding ring 32 at one end of the frame. The support frame 90 is... The device includes a grinding bowl 31 with its opening facing upwards. Multiple grinding balls 33 are disposed within the grinding bowl 31. A liftable frame drives a grinding ring 32 to rise and fall, thus cooperating with the grinding bowl 31. The grinding ring 32 contacts the grinding balls 33 when the portable testing device is in operation. The upper outer side of the grinding bowl 31 is pivotally connected to the upper part of a support frame 90. An electronic scale 50, a vibrating screen 60, and a limiting support assembly 40 that limits and supports the bottom of the grinding bowl 31 are also disposed on the mounting plate 80. The electronic scale 50 is used to weigh the coal sample before and after crushing and screening, and the vibrating screen 60 is used to screen the ground coal sample.

[0030] Furthermore, such as Figure 4 As shown, the lifting frame includes a vertical frame and a horizontal frame. A rotating motor is provided at the end of the horizontal frame. The rotating motor is connected to the grinding ring 32 and is used to drive the grinding ring 32 to rotate.

[0031] Furthermore, when the portable testing device is working, a counterweight 70 is installed on the horizontal frame to provide downward pressure for the grinding ring 32 when grinding the coal sample. A counterweight storage box 13 is provided inside the box 10, which can serve as an internal partition for the box 10. When the portable testing device is not working, the counterweight 70 is placed in the counterweight storage box 13. The counterweight storage box 13 is equipped with a baffle to prevent the counterweight 70 from falling off during the movement of the box 10.

[0032] Furthermore, such as Figure 6 As shown, the support frame 90 includes two support plates arranged vertically relative to each other. The upper outer side of the grinding bowl 31 is provided with two connecting ears. The support plates are connected to the connecting ears of the grinding bowl 31 by pins, which can realize the rotation of the grinding bowl 31 relative to the support plates, so as to facilitate the removal of the coal sample after grinding.

[0033] Furthermore, an air jet device 91 is provided on the upper part of one of the support plates. The air jet device 91 includes a nozzle and a flexible air pipe. The box 10 is also provided with an air pump. The air jet device 91 can be used to blow air to clean the grinding bowl 31 after the coal sample is poured out, so as to ensure the accuracy of the initial weight of the coal sample in the next test.

[0034] Furthermore, such as Figure 5 , Figure 7 As shown, the limiting support assembly 40 includes a limiting support block 41 and a locking device 42. The limiting support block 41 is slidably mounted on the mounting plate 80 via a slide rail. The bottom of the grinding bowl 31 has a limiting groove arranged radially. The limiting support block 41 can slide into the limiting groove via the slide rail on the mounting plate 80. After entering the bottom of the grinding bowl 31, the distance between the limiting support block 41 and the top surface of the limiting groove is 1mm-2mm. This margin will gradually decrease after the grinding ring 32 presses down on the grinding ball 32, so that the limiting support block 41 contacts the top surface of the limiting groove, thereby undertaking the supporting role. The side also undertakes the role of preventing the grinding bowl 31 from rotating.

[0035] Furthermore, the locking device 42 is fastened to the slide rail by a set screw.

[0036] Furthermore, the box 10 is a rectangular box with 6 sides, including a first cover 11 and a second cover 12 rotatably mounted on the box 10. The first cover 11 is rotatably connected to the rear cover, and the second cover 12 is rotatably connected to the bottom cover. After the first cover 11 and the second cover 12 are closed, they are connected by a latch to ensure that the box 10 will not be opened during transportation. The first cover 11 and the second cover 12 are provided with handles to facilitate opening the covers.

[0037] Furthermore, the housing 10 is equipped with a pull rod, rollers, and a power interface.

[0038] Furthermore, the mounting plate 80 is provided with a vibrating screen 60 that can slide relative to the grinding bowl 31, such as... Figure 5 As shown, the bottom of the vibrating screen 60 is mounted on the mounting plate 80 via a slide rail. When the grinding bowl 31 is grinding, the vibrating screen 60 slides to the side away from the grinding bowl 31 to avoid contact with it. When it is necessary to transfer the crushed coal sample in the grinding bowl 31 to the vibrating screen 60, the vibrating screen 60 slides close to the grinding bowl 31. After the limiting support component 40 is disengaged from the grinding bowl, the drive device 50 lifts the grinding ring 32 to the highest position, thereby tilting the grinding bowl 31 to facilitate the operator to transfer the coal sample in the grinding bowl 31 to the vibrating screen 60. The vibrating screen 60 has a screen, and the mounting plate 80 is also equipped with an electronic scale 50.

[0039] In use: Place the prepared coal sample (particle size 0.63-1.25mm) into the grinding bowl 31. Add a certain weight of coal sample into the grinding bowl 31 using the electronic scale 50. Then, the lifting frame of the drive device 20 drives the grinding ring 32 to descend and contact the grinding balls 33. Apply a counterweight 70 to the horizontal frame above the grinding ring 32. Then, move the limiting support component 40 to the lower part of the grinding bowl 31. The grinding ring 32 in the grinding bowl 31 drives the grinding balls 33 to rotate, thereby grinding the coal sample. After grinding, remove the limiting support component 40. The lifting frame drives the grinding ring 32 to the top. Then, tilt the grinding bowl 31 and pour the coal sample onto the vibrating screen 60. The coal sample is sieved through the screen, and the mass of the sieved coal sample is measured using the electronic scale. Based on the mass of the sieved coal sample, the Hardy Grindability Index is obtained from the calibration chart drawn from the standard coal sample.

[0040] This invention integrates grinding, screening, and load-bearing devices into a single movable housing, greatly facilitating the transport of the device and meeting on-site testing needs in various situations, thus improving operational convenience. Furthermore, the grinding bowl of this invention is rotatable from the support, eliminating the need to disassemble the bowl when emptying the ground coal, making operation more convenient. A limiting support component at the bottom of the grinding bowl provides both support and restraint. The limiting support block engages with the limiting groove at the bottom of the grinding bowl to prevent wobbling when subjected to the grinding ring, while also bearing the vertical force applied by the grinding ring. Additionally, an air jet device on the support frame facilitates cleaning of the grinding bowl, allowing residual samples to be thoroughly cleaned by blowing air. This invention is characterized by its portability, multifunctionality, and ease of sample processing.

[0041] It should be noted that the above embodiments are intended to illustrate the technical solutions of this utility model and are exemplary embodiments of the claims of this utility model, rather than limiting the claims. Although the above embodiments have described this utility model in detail, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A portable testing device for the Hardgrove grindability index of coal, characterized in that, The portable testing device is housed within a box that can be freely moved. The box contains a mounting plate and includes at least two unfoldable covers. The mounting plate is equipped with a drive unit, a support frame, and a grinding device. The grinding device includes a grinding ring and a grinding bowl. The drive unit includes a liftable frame with a rotatable grinding ring at one end. The support frame houses the grinding bowl, with its opening facing upwards. Multiple grinding balls are disposed within the grinding bowl. The grinding ring contacts the grinding balls during operation. The upper outer side of the grinding bowl is pivotally connected to the upper part of the support frame. The mounting plate also includes an electronic scale, a vibrating screen, and a limiting support assembly that limits and supports the bottom of the grinding bowl.

2. The portable testing device for the Hardgrove grindability index of coal as described in claim 1, characterized in that, The lifting frame includes a vertical frame and a horizontal frame. A rotating motor is installed at the end of the horizontal frame, and the rotating motor is connected to the grinding ring.

3. The portable testing device for the Hardgrove grindability index of coal as described in claim 2, characterized in that, When the portable testing device is working, a counterweight is installed on the horizontal frame, and a counterweight storage box is installed inside the box. When the portable testing device is not working, the counterweight is placed in the counterweight storage box.

4. The portable testing device for the Hardgrove grindability index of coal as described in claim 1, characterized in that, The support frame includes two support plates arranged vertically opposite each other. Two connecting ears are provided on the upper outer side of the grinding bowl. The support plates are connected to the connecting ears of the grinding bowl by pins.

5. The portable testing device for the Hardgrove grindability index of coal as described in claim 4, characterized in that, One of the support plates is equipped with an air jet device on its upper part. The air jet device includes a nozzle and a flexible air tube. The housing is also equipped with an air pump.

6. The portable testing device for the Hardgrove grindability index of coal as described in claim 5, characterized in that, The limiting support assembly includes a limiting support block and a locking device. The limiting support block is slidably mounted on the mounting plate via a slide rail. The bottom of the grinding bowl has a limiting groove arranged radially. The limiting support block can slide into the limiting groove via the slide rail.

7. The portable testing device for the Hardgrove grindability index of coal as described in claim 6, characterized in that, The locking device is fastened to the slide rail by a set screw.

8. The portable testing device for the Hardgrove grindability index of coal as described in claim 1, characterized in that, The box is a rectangular box, including a first cover and a second cover that are rotatably mounted on the box. The first cover and the second cover are connected by a latch when closed, and handles are provided on the first cover and the second cover.

9. The portable testing device for the Hardgrove grindability index of coal as described in claim 8, characterized in that, The enclosure is equipped with a pull rod, rollers, and a power interface.

10. The portable testing device for the Hardgrove grindability index of coal as described in any one of claims 1-9, characterized in that, The mounting plate is equipped with a vibrating screen that can slide relative to the grinding bowl. The vibrating screen has a screen mesh, and the mounting plate is also equipped with an electronic scale.

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