An extraction device for coal quality testing

Abstract

This utility model relates to the field of extraction device technology, and specifically discloses an extraction device for coal quality testing. A mixing chamber is slidably connected inside a crushing chamber. Two crushing rollers are rotatably connected inside the crushing chamber, and a drive shaft is rotatably connected inside the mixing chamber. Power transmission components are provided on the outer surfaces of the two crushing rollers and the drive shaft. A funnel-shaped feeding hopper is sleeved inside the crushing chamber, located at the upper end of the mixing chamber. A drive motor is fixedly connected to the outer surface of the crushing chamber. Through the integrated design of the crushing chamber and the mixing chamber, the coal material falls into the mixing chamber immediately after crushing, and the crushing rollers synchronously drive the operation of the drive shaft. Rotational power is transmitted simultaneously with crushing to achieve mixing. This not only saves the time required for extraction but also reduces the need for a power source. The integrated design of the crushing chamber and the mixing chamber also saves the overall space occupied by the device, facilitating efficient and convenient extraction operations.

Description

Technical Field

[0001] This utility model relates to the field of extraction device technology, and in particular to an extraction device for coal quality testing. Background Technology

[0002] In the field of coal quality testing, accurately obtaining representative coal sample extracts is crucial for the reliability of test results. Coal extraction devices, as key equipment for obtaining coal sample extracts, are widely used in coal mining enterprises, coal testing institutions, and other locations to extract coal powder samples for testing from raw coal blocks. Currently, coal extraction devices for practical applications typically require the following technologies:

[0003] 1. High-efficiency crushing technology: It can efficiently crush lumpy coal into coal powder particles suitable for testing, ensuring the uniformity and representativeness of coal samples.

[0004] 2. Thorough mixing technology: The crushed coal powder is thoroughly mixed to ensure that the coal powder used for testing can fully represent the quality of the coal block being tested.

[0005] 3. Rational spatial layout technology: While ensuring the extraction function, optimize the device structure, reduce space occupation, and improve the applicability of the equipment.

[0006] 4. Convenient maintenance technology: Facilitates daily maintenance and parts replacement, reduces equipment failure rate, and extends equipment lifespan.

[0007] Currently, there are various types of extraction devices for coal quality testing on the market. Some devices adopt a split design, with the crushing and mixing functions set in two separate devices, while others use manual stirring to mix the crushed coal sample.

[0008] However, the above method has a prominent problem: the split equipment separates crushing and mixing into two processing steps. Although this design can achieve the crushing and mixing of coal samples, in actual operation, the process of transferring the coal sample from the crushing equipment to the mixing equipment is quite cumbersome. This not only increases the operation time, but may also lead to coal sample loss or external contamination, affecting the accuracy of the test results. Moreover, the two independent devices require a large amount of space, and the transfer process is not conducive to efficient processing. Utility Model Content

[0009] To address the shortcomings of existing technologies, this utility model provides an extraction device for coal quality testing. It solves the problem that while the design of split-type equipment that separates crushing and mixing into two processing steps can achieve both crushing and mixing of coal samples, the process of transferring the coal sample from the crushing equipment to the mixing equipment is cumbersome in actual operation. This not only increases the operation time but may also lead to coal sample loss or external contamination, affecting the accuracy of the test results. Moreover, the two independent devices require a large amount of space, and the transfer process is not conducive to efficient processing.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] An extraction device for coal quality testing includes a crushing box, a mixing box slidably connected inside the crushing box, two crushing rollers rotatably connected inside the crushing box, a drive shaft rotatably connected inside the mixing box, power transmission components provided on the outer surfaces of the two crushing rollers and the drive shaft, a funnel-shaped feeding hopper sleeved inside the crushing box, the funnel-shaped feeding hopper being located at the upper end of the mixing box, a drive motor fixedly connected to the outer surface of the crushing box, and the two crushing rollers being disposed on the outer surface of the drive motor.

[0012] Preferably, both of the crushing rollers have spur gears fitted onto their outer surfaces, and the two spur gears mesh with each other.

[0013] Preferably, the upper end of the mixing box is fixedly connected to two dovetail-shaped sliders, both of which are slidably connected inside the crushing box, and the lower end of the mixing box is provided with a discharge valve.

[0014] Preferably, both the crushing box and the mixing box are threadedly connected with a set of fixing bolts, and the mixing box is rotatably connected with a stirring rod.

[0015] Preferably, both the fixing bolt and the outer surface of the stirring rod are fitted with bevel gears, and the two bevel gears mesh with each other.

[0016] Preferably, the crushing box is equipped with a sieve plate inside and a collection box is provided on the outer surface of the crushing box.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through the integrated design of the crushing box and the mixing box, the coal material will fall into the mixing box as soon as it is crushed. The operation of the transmission shaft is synchronously driven by the crushing roller, and the rotational power is transmitted at the same time to realize the mixing operation. This not only saves the time required for the extraction operation, but also reduces the setting of the power source. The integrated design of the crushing box and the mixing box will save the overall space occupied by the device, which is conducive to completing the extraction operation efficiently and conveniently.

[0019] 2. When the device needs maintenance, unscrew a set of fixing bolts, then remove the power transmission component sleeved on the drive shaft surface. The mixing box can then be slid out to achieve disassembly. The disassembly design makes maintenance operations more convenient. Attached Figure Description

[0020] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is an exploded view of the mixing box connection of this utility model;

[0023] Figure 3 This is an exploded view of the stirring rod connection of this utility model;

[0024] Figure 4 This is an exploded view of the sieve plate connection of this utility model.

[0025] Legend: 11. Crushing box; 12. Mixing box; 13. Crushing roller; 14. Drive shaft; 15. Power transmission assembly; 16. Funnel-shaped feed hopper; 17. Drive motor; 18. Spur gear; 19. Dovetail slider; 21. Discharge valve; 22. Fixing bolt; 23. Stirring rod; 24. Bevel gear; 25. Screen plate; 26. Collection box. Detailed Implementation

[0026] This application provides a coal quality testing extraction device that effectively solves the problem of separate equipment that divides crushing and mixing into two processing steps. While this design can achieve both crushing and mixing of coal samples, the process of transferring the coal sample from the crushing equipment to the mixing equipment is cumbersome in actual operation. This not only increases operation time but may also lead to coal sample loss or external contamination, affecting the accuracy of the test results. Moreover, two independent devices require a large amount of space, and the transfer process is not conducive to efficient processing. Through the integrated design of the crushing box and the mixing box, the coal material falls into the mixing box as soon as it is crushed. The crushing roller synchronously drives the operation of the transmission shaft, transmitting rotational power while crushing to achieve the mixing operation. This not only saves the time required for extraction but also reduces the need for a power source. The integrated design of the crushing box and the mixing box also saves the overall footprint of the device, which is conducive to completing the extraction operation efficiently and conveniently.

[0027] Example

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this application embodiment effectively solves the problem that while the design of split-type equipment that divides crushing and mixing into two processing steps can achieve crushing and mixing of coal samples, in actual operation, the process of transferring the coal sample from the crushing equipment to the mixing equipment is cumbersome. This not only increases the operation time but may also lead to coal sample loss or external contamination, affecting the accuracy of the test results. Moreover, the two independent devices require a large amount of space, and the transfer process is not conducive to efficient processing. The overall idea is as follows: A coal quality testing extraction device includes a crushing box 11, a mixing box 12 slidably connected inside the crushing box 11, two crushing rollers 13 rotatably connected inside the crushing box 11, a drive shaft 14 rotatably connected inside the mixing box 12, a power transmission component 15 provided on the outer surface of the two crushing rollers 13 and the drive shaft 14, a funnel-shaped feeding hopper 16 sleeved inside the crushing box 11, the funnel-shaped feeding hopper 16 located at the upper end of the mixing box 12, and a drive motor 17 fixedly connected to the outer surface of the crushing box 11. Two crushing rollers 13 are mounted on the outer surface of the drive motor 17. Spur gears 18 are fitted onto the outer surfaces of both crushing rollers 13, and the two spur gears 18 mesh with each other. Two dovetail sliders 19 are fixedly connected to the upper end of the mixing box 12, and both dovetail sliders 19 are slidably connected inside the crushing box 11. A discharge valve 21 is provided at the lower end of the mixing box 12. A set of fixing bolts 22 are threaded into both the crushing box 11 and the mixing box 12. The crushing box 11 and the mixing box 12 are assembled by sliding connection. After assembly, the fixing bolts 22 are tightened to secure the device. The support leg at the lower end of the crushing box 11 has a slot that matches the outer diameter of the drive shaft 14. When maintenance is required, the fixing bolts 22 are tightened and removed. The power transmission assembly 15 fitted onto the surface of the drive shaft 14 (the drive shaft 14 and the power transmission assembly 15 are connected by a spline) can then be removed, allowing the mixing box 12 to be slid out and disassembled. This detachable design facilitates maintenance operations.

[0029] Inside the mixing chamber 12, a stirring rod 23 is rotatably connected. Both the fixing bolt 22 and the outer surface of the stirring rod 23 are fitted with bevel gears 24. The two bevel gears 24 mesh. During the crushing, stirring, and extraction of the sample, the drive motor 17 is activated as the power source. The output shaft of the drive motor 17 drives one crushing roller 13 to rotate. At this time, the two crushing rollers 13 will rotate in opposite directions through the meshing of spur gears 18 fitted on their surfaces. The opposing rotation of the two crushing rollers 13 crushes the coal block. During rotation, the crushing roller 13 not located outside the output shaft of the drive motor 17 will drive the transmission shaft 14 to rotate through the power transmission assembly 15 on its surface. The power transmission assembly 15 includes two synchronous pulleys and a synchronous belt. The two synchronous pulleys are respectively fitted with… The timing belt is attached to the outer surfaces of the crushing roller 13 and the drive shaft 14, and is sleeved on the outer surfaces of the two timing pulleys. When the crushing roller 13 rotates to perform the crushing operation, it will synchronously drive the drive shaft 14 to rotate. The rotation of the drive shaft 14 will drive the stirring rod 23 to rotate to perform the mixing operation through the meshing of two bevel gears 24. Through the integrated design of the crushing box 11 and the mixing box 12, the coal material will fall into the mixing box 12 after being crushed, and the operation of the drive shaft 14 will be synchronously driven by the crushing roller 13. The rotational power is transmitted at the same time as crushing to achieve the mixing operation. This not only saves the time required for the extraction operation, but also reduces the setting of the power source. The integrated design of the crushing box 11 and the mixing box 12 will save the overall area occupied by the device, which is conducive to completing the extraction operation efficiently and conveniently.

[0030] The crushing box 11 is equipped with a screen plate 25 inside and a collection box 26 on its outer surface. A batch of finished coal blocks to be tested is fed into the crushing box 11 through the feeding hopper at the top. After being crushed and processed in the crushing box 11, fine coal powder is obtained. The coal powder falls into the mixing box 12 through the funnel-shaped feeding hopper 16 at the bottom of the crushing box 11. The funnel-shaped feeding hopper 16 guides and conveys the coal powder from the crushing box 11 into the mixing box 12. The coal powder is then transported to the mixing box 12. After being placed in the crushing box 12, the coal powder is stirred and mixed by the rotating stirring rod 23. The extracted coal powder will be discharged through the opening of the discharge valve 21 for testing. The extraction process of crushing and stirring ensures that the coal powder used for testing can fully represent the quality of the coal block being tested, and improves the uniformity of the sampling operation. The inclined screen plate 25 in the crushing box 11 will screen the crushed material. The larger materials will roll outward along the inclined screen plate 25 to the collection box 26 for collection and storage.

[0031] To address the problems existing in the prior art, this utility model provides an extraction device for coal quality testing. Through the integrated design of the crushing box 11 and the mixing box 12, the coal material falls into the mixing box 12 as soon as it is crushed. The crushing roller 13 synchronously drives the operation of the transmission shaft 14, transmitting rotational power at the same time as crushing to achieve the stirring and mixing operation. This not only saves the time required for the extraction operation but also reduces the need for a power source. The integrated design of the crushing box 11 and the mixing box 12 also saves the overall area occupied by the device, which is conducive to completing the extraction operation efficiently and conveniently.

[0032] Working principle:

[0033] The first step involves feeding a batch of finished coal blocks to be tested into the crushing box 11 via the feeding hopper at the top. After crushing and processing within the crushing box 11, fine coal powder is obtained. The coal powder then falls into the mixing box 12 via the funnel-shaped feeding hopper 16 at the bottom of the crushing box 11. The funnel-shaped feeding hopper 16 guides the coal powder from the crushing box 11 into the mixing box 12. After being transported into the mixing box 12, the coal powder is stirred and mixed by the rotating stirring rod 23. The extracted coal powder is then discharged through the opening of the discharge valve 21 for testing. The crushing and stirring extraction process ensures that the coal powder used for testing can fully represent the quality of the coal blocks being tested, improving the uniformity of the sampling operation. The inclined screen plate 25 inside the crushing box 11 screens the crushed material. Larger materials will roll outward along the inclined screen plate 25 to the collection box 26 for collection and storage.

[0034] In the second step, during the crushing, stirring, and extraction of the sample, the drive motor 17 is activated as the power source. The output shaft of the drive motor 17 drives one crushing roller 13 to rotate. At this time, the two crushing rollers 13 will rotate in opposite directions through the meshing of spur gears 18 sleeved on their surfaces. The opposing rotation of the two crushing rollers 13 crushes the coal block. During the rotation, the crushing roller 13 that is not outside the output shaft of the drive motor 17 will drive the transmission shaft 14 to rotate through the power transmission component 15 on its surface. The power transmission assembly 15 includes two synchronous pulleys and a synchronous belt. The two synchronous pulleys are respectively sleeved on the outer surfaces of the crushing roller 13 and the drive shaft 14, and the synchronous belt is sleeved on the outer surfaces of the two synchronous pulleys. When the crushing roller 13 rotates to perform the crushing operation, it synchronously drives the drive shaft 14 to rotate. The rotation of the drive shaft 14, in turn, drives the stirring rod 23 to rotate to perform the mixing operation through the meshing of two bevel gears 24. Through the integrated design of the crushing box 11 and the mixing box 12, the coal material falls into the mixing box 12 as soon as it is crushed, and is then transported by the crushing roller. The operation of the drive shaft 14 is synchronized with the operation of the crushing roller 13, which transmits rotational power while crushing to achieve mixing. This not only saves the time required for extraction but also reduces the number of power sources. The integrated design of the crushing box 11 and the mixing box 12 saves the overall area occupied by the device, which is conducive to completing the extraction operation efficiently and conveniently. It should be noted that after the two crushing rollers 13 rotate to crush, the drive motor 17 should be kept running for a period of time to ensure that all coal powder materials are fully mixed. The crushing box 11 and the mixing box 12 are assembled by sliding connection. After assembly, they are fixed by tightening the fixing bolts 22. The support leg at the lower end of the crushing box 11 has a slot that matches the outer diameter of the drive shaft 14. When the device needs maintenance, tighten and remove a set of fixing bolts 22. At this time, remove the power transmission component 15 sleeved on the surface of the drive shaft 14 (the drive shaft 14 and the power transmission component 15 are sleeved and installed by spline). The mixing box 12 can then be slid out to achieve disassembly. The disassembly design makes maintenance more convenient.

[0035] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An extraction device for coal quality testing, comprising a crushing chamber (11), wherein a mixing chamber (12) is slidably connected inside the crushing chamber (11), characterized in that, The crushing box (11) has two crushing rollers (13) rotatably connected inside, and the mixing box (12) has a drive shaft (14) rotatably connected inside. The outer surfaces of the two crushing rollers (13) and the drive shaft (14) are provided with a power transmission assembly (15). The crushing box (11) has a funnel-shaped feeding hopper (16) sleeved inside, and the funnel-shaped feeding hopper (16) is located at the upper end of the mixing box (12). The outer surface of the crushing box (11) is fixedly connected to a drive motor (17), and the two crushing rollers (13) are arranged on the outer surface of the drive motor (17).

2. The extraction device for coal quality testing as described in claim 1, characterized in that, Both of the crushing rollers (13) have spur gears (18) fitted onto their outer surfaces; The two spur gears (18) mesh with each other.

3. The extraction device for coal quality testing as described in claim 2, characterized in that, Two dovetail sliders (19) are fixedly connected to the upper end of the mixing box (12), and both dovetail sliders (19) are slidably connected inside the crushing box (11); The mixing box (12) is equipped with a discharge valve (21) at its lower end.

4. The extraction device for coal quality testing as described in claim 3, characterized in that, Both the crushing box (11) and the mixing box (12) are internally connected with a set of fixing bolts (22); The mixing box (12) is rotatably connected to a stirring rod (23).

5. The extraction device for coal quality testing as described in claim 4, characterized in that, Both the fixing bolt (22) and the stirring rod (23) have bevel gears (24) sleeved on their outer surfaces; The two bevel gears (24) mesh with each other.

6. The extraction device for coal quality testing as described in claim 5, characterized in that, The crushing box (11) is equipped with a screen plate (25); The outer surface of the crushing box (11) is provided with a collection box (26).

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