Coal crushing device and coal quality detection device

Abstract

The utility model relates to coal quality detection technical field discloses a coal crushing device and coal quality detection device, including casing, screening subassembly, flow guide seat, grinding block and air heater. The casing is equipped with feed inlet and discharge gate. Screening subassembly divides the casing into intercommunicating first chamber and second chamber, the first chamber communicates with the feed inlet, and the second chamber communicates with the discharge gate. The flow guide seat is located in the downside of feed inlet. The grinding block is located in the flow guide seat, and the clearance between the peripheral wall of grinding block and the inner wall of flow guide seat, and the grinding block can rotate relative to the flow guide seat. The air heater is connected with the casing, and the air outlet of air heater is communicated to the second chamber. The coal is crushed through the grinding block, and the crushed coal is collected to the second chamber, and the coal in the second chamber is dried through the air heater, and the crushing and drying of coal are completed in the casing, the operation of manual sample transfer is reduced, the detection error is reduced, the process is saved, and the detection efficiency is improved.

Description

Technical Field

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

[0002] In the operation of thermal power plants, the quality of incoming coal directly affects power generation efficiency, cost control, and the safe and stable operation of equipment. Incoming coal inspection is a crucial step in ensuring that coal quality meets the production requirements of thermal power plants. This includes sampling, sample preparation, and testing. Sample preparation typically involves crushing, screening, mixing, and reduction. Because coal contains a significant amount of moisture, it needs to be dried during sample preparation to remove this moisture. Insufficient drying directly affects the results of ash content, volatile matter, and calorific value measurements, leading to inaccurate test data. In related technologies, coal crushing and drying are usually carried out separately, requiring manual sample transfer. This not only increases the testing cycle but also easily introduces human error, reducing testing efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a coal crushing device and a coal quality testing device that can shorten the operation process of coal quality testing, reduce manual operation steps, improve work efficiency, and reduce testing errors.

[0004] To achieve the above objectives, this utility model provides a coal crushing device, comprising:

[0005] A housing, wherein the housing is provided with an inlet and an outlet;

[0006] A screening component is disposed within the housing and divides the housing into a first chamber and a second chamber that are interconnected. The first chamber is connected to the inlet, and the second chamber is connected to the outlet.

[0007] A flow guide seat is disposed in the first chamber and located below the feed inlet;

[0008] A grinding block is disposed inside the flow guide seat, and there is a gap between the peripheral wall of the grinding block and the inner wall of the flow guide seat. The grinding block can rotate relative to the flow guide seat to crush coal.

[0009] A hot air blower is connected to the housing, and the air outlet of the hot air blower is connected to the second chamber.

[0010] According to one embodiment of the present invention, the hot air blower is disposed on the peripheral wall of the second chamber.

[0011] According to one embodiment of the present invention, the coal crushing device further includes a drive shaft, which passes through the first chamber and the second chamber, and both ends of the drive shaft are rotatably connected to the housing, and the grinding block is connected to the drive shaft.

[0012] According to one embodiment of the present invention, the coal crushing device further includes a stirring blade, which is disposed in the second chamber and connected to the drive shaft.

[0013] According to one embodiment of the present invention, the bottom wall of the second chamber is an inclined surface, and it is inclined toward the side where the discharge port is located.

[0014] According to one embodiment of the present invention, the coal crushing device further includes a cleaning brush, which is disposed in the first chamber and connected to the drive shaft, and the bristles of the cleaning brush are in contact with the side of the screening component facing the first chamber.

[0015] According to one embodiment of the present invention, the screening assembly includes a first sieve plate and a second sieve plate. The second sieve plate is disposed on the side of the first sieve plate facing the second chamber. The first sieve plate is provided with a first sieve hole, and the second sieve plate is provided with a second sieve hole communicating with the first sieve hole. The first sieve plate is connected to the housing, and the second sieve plate is rotatable relative to the first sieve plate.

[0016] According to one embodiment of the present invention, the screening assembly further includes a worm and a worm wheel, the worm wheel being connected to the worm, the worm being connected to the housing, and the worm wheel being fixedly connected to the second sieve plate.

[0017] According to one embodiment of the present invention, the screening assembly further includes an adjusting handwheel, which is connected to one end of the worm gear and is located on the outside of the housing.

[0018] This utility model also provides a coal quality testing device, comprising:

[0019] The coal crushing device described above;

[0020] A laboratory instrument, which is connected to the discharge port.

[0021] Compared with the prior art, the coal crushing device and coal quality testing device of this utility model have the following advantages:

[0022] The coal crushing device of this embodiment crushes and grinds coal using grinding blocks, and collects the crushed coal into a second chamber. A hot air blower is connected to the second chamber to supply hot air and dry the coal. This coal crushing device completes the crushing and drying processes without the need for manual sample transfer, reducing detection errors, saving steps, and improving detection efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the coal quality testing device provided in this embodiment of the utility model.

[0024] Figure 2 This is a cross-sectional view of the coal quality testing device provided in this embodiment of the utility model.

[0025] Figure 3 This is a schematic diagram of the internal structure of the coal crushing device provided in this embodiment of the utility model.

[0026] Figure 4 This is a partial structural schematic diagram of the coal crushing device provided in this embodiment of the utility model.

[0027] Figure 5 This is a schematic diagram of the structure of the screening component provided in an embodiment of this utility model.

[0028] Figure label:

[0029] 100. Coal crushing equipment;

[0030] 110. Shell; 111. Inlet; 112. Outlet; 113. First chamber; 114. Second chamber; 115. Observation window;

[0031] 120. Screening assembly; 121. First sieve plate; 1211. First sieve hole; 122. Second sieve plate; 1221. Second sieve hole; 123. Worm gear; 124. Worm wheel; 125. Adjusting handwheel; 126. Support component; 127. Sealing box;

[0032] 130. Flow guide seat; 140. Drive motor; 141. Drive shaft; 142. Grinding block; 143. Stirring blade; 144. Cleaning brush; 150. Hot air blower; 200. Laboratory instrument. Detailed Implementation

[0033] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0034] In the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] like Figure 1 As shown in the figure, a coal quality testing device according to an embodiment of the present invention includes a laboratory 200 and a coal crushing device 100 as described below. The coal crushing device 100 can process coal to meet testing requirements. The laboratory 200 is connected to the discharge port 112 of the coal crushing device 100, and can perform testing on the coal processed by the coal crushing device 100. The laboratory 200 can be a 5E-MAC IV infrared rapid coal quality analyzer or an XKY-500B carbon, hydrogen, and nitrogen element analyzer.

[0038] like Figure 2 and Figure 3 As shown, a coal crushing device 100 according to an embodiment of the present invention includes a shell 110, a screening component 120, a flow guide seat 130, a grinding block 142 and a hot air blower 150.

[0039] Specifically, the housing 110 is provided with an inlet 111 and an outlet 112. A screening assembly 120 is disposed within the housing 110, dividing the interior of the housing 110 into a first chamber 113 and a second chamber 114 that are interconnected. The screening assembly 120 has sieve holes to connect the first chamber 113 and the second chamber 114. The first chamber 113 is connected to the inlet 111, and the second chamber 114 is connected to the outlet 112. The second chamber 114 is located below the first chamber 113. A flow guide seat 130 is disposed within the first chamber 113 and is located below the inlet 111. A grinding block 142 is disposed within the flow guide seat 130. A gap exists between the peripheral wall of the grinding block 142 and the inner wall of the flow guide seat 130. The grinding block 142 can rotate relative to the flow guide seat 130 to crush and grind the coal within the flow guide seat 130. The hot air blower 150 is connected to the housing 110, and the air outlet of the hot air blower 150 is connected to the second chamber 114.

[0040] like Figure 3 The feed inlet 111 is located at the top of the housing 110, and the discharge outlet 112 is located on the bottom side of the peripheral wall of the housing 110. The screening assembly 120 is located inside the housing 110, dividing the interior of the housing 110 into a first chamber 113 and a second chamber 114 distributed vertically. A flow guide seat 130 can be welded to the inner wall of the housing 110. The flow guide seat 130 is located below the feed inlet 111 and has through holes extending vertically through both ends, the through holes being funnel-shaped, wider at the top and narrower at the bottom. A grinding block 142 is located inside the flow guide seat 130, the shape of the grinding block 142 matching the shape of the through holes in the flow guide seat 130, and there is a gap between the grinding block 142 and the flow guide seat 130. For example, in... Figure 2 and Figure 3In the example, the lower end of the grinding block 142 is conical, and the upper end is cylindrical. The gap between the upper end of the grinding block 142 and the guide seat 130 is larger than the gap between its lower end and the guide seat 130. Coal can enter the gap between the grinding block 142 and the guide seat 130, and is crushed and ground by the rotation of the grinding block 142 relative to the guide seat 130. The screening component 120 is located below the guide seat 130. After being crushed and ground between the guide seat 130 and the grinding block 142, the coal falls onto the screening component 120 and then into the second chamber 114 for collection. The coal in the second chamber 114 is conveyed to the analyzer 200 through the discharge port 112 for the next process. The discharge port 112 is connected to the analyzer 200 through a feeding pipe, and a solenoid valve is provided at the discharge port 112 to control the opening of the discharge port 112. In some embodiments, an observation window 115 is provided in the middle of the housing 110, and the observation window 115 is provided with transparent glass so that the crushing condition of the coal inside the housing 110 can be observed through the observation window 115. A hot air blower 150 is disposed on the peripheral wall of the second chamber 114, and the air outlet of the hot air blower 150 is connected to the second chamber 114 to deliver hot air at a temperature higher than room temperature into the second chamber 114, thereby drying the coal powder inside the second chamber 114. This reduces the manual sample transfer operation between the coal crushing and drying steps, reduces detection errors, saves steps, and improves detection efficiency. The hot air blower 150 can be disposed on the peripheral wall on the side opposite to the discharge port 112.

[0041] According to the coal crushing device 100 of this utility model embodiment, coal is crushed and ground by grinding blocks 142, and the crushed coal is collected into a second chamber 114. A hot air blower 150 is connected to the second chamber 114 to deliver hot air to the second chamber 114 to dry the coal. The coal crushing and drying process is completed by the coal crushing device 100, eliminating the need for manual sample transfer, reducing detection errors, saving steps, and improving detection efficiency.

[0042] like Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, the coal crushing device 100 further includes a drive shaft 141, which passes through the first chamber 113 and the second chamber 114, and both ends of the drive shaft 141 are rotatably connected to the housing 110, respectively. The grinding block 142 is connected to the drive shaft 141. Specifically, the upper end of the drive shaft 141 is rotatably connected to the top of the housing 110 via a bearing, and the lower end is rotatably connected to the bottom of the housing 110 via a bearing. The grinding block 142 is connected to the drive shaft 141. A drive motor 140 is connected to the upper end of the drive shaft 141. The drive motor 140 drives the drive shaft 141 to rotate, and the drive shaft 141 drives the grinding block 142 to rotate relative to the guide seat 130, so as to squeeze and crush the coal.

[0043] According to some embodiments of the present invention, the coal crushing device 100 further includes a stirring blade 143, which is disposed in the second chamber 114 and connected to the drive shaft 141. Specifically, the stirring blade 143 can be fixed to the drive shaft 141 by bolts or other fasteners. The drive shaft 141 drives the stirring blade 143 to rotate, thereby stirring the coal in the second chamber 114. There can be multiple stirring blades 143, which are distributed circumferentially along the drive shaft 141. In some embodiments, the bottom wall of the second chamber 114 is an inclined surface, and it is inclined towards the side where the discharge port 112 is located, that is, the side of the bottom wall of the second chamber 114 near the discharge port 112 is lower than the side away from the discharge port 112, which is beneficial for the coal to accumulate towards the discharge port 112. Figure 2 As shown, the discharge port 112 is connected to the analyzer 200 through a feeding pipe. The feeding pipe extends downward at an incline and may be equipped with a spiral feeding device (not shown in the figure) to transport the coal accumulated at the discharge port 112 into the analyzer 200.

[0044] like Figure 3 and Figure 5 As shown, according to some embodiments of the present invention, the screening component 120 includes a first screen plate 121 and a second screen plate 122. The second screen plate 122 is disposed on the side of the first screen plate 121 facing the second chamber 114. The first screen plate 121 has a first screen hole 1211, and the second screen plate 122 has a second screen hole 1221 communicating with the first screen hole 1211. The first screen plate 121 is connected to the housing 110, and the second screen plate 122 is rotatable relative to the first screen plate 121. Specifically, the first screen plate 121 can be welded to the inner wall of the housing 110. The second screen plate 122 is stacked with the first screen plate 121, and the second screen plate 122 is located on the side of the first screen plate 121 facing the second chamber 114. One end of the second screen hole 1221 at least partially overlaps with one end of the first screen hole 1211, so that the second screen hole 1221 communicates with the first screen hole 1211 to form a screening channel. The second screen plate 122 can rotate relative to the first screen plate 121. This rotation adjusts the size of the screening channel and the range of coal particles screened by the screening assembly 120, meeting different testing requirements. Both the first screen plate 121 and the second screen plate 122 are mounted on the drive shaft 141, but the drive shaft 141 does not rotate the first and second screen plates 121 or 122. For example, the first and second screen plates 121 and 122 can be supported by bearings mounted on the drive shaft 141. Figure 3 and Figure 4As shown, in some embodiments, the coal crushing device 100 further includes a cleaning brush 144, which is disposed in the first chamber 113 and connected to the drive shaft 141. The bristles of the cleaning brush 144 contact the side of the screening assembly 120 facing the first chamber 113. The drive shaft 141 may be provided with a threaded hole, and one end of the cleaning brush 144 is provided with a thread, so the cleaning brush 144 and the drive shaft 141 can be threadedly connected. The bristles of the driving cleaning brush 144 contact the first screen plate 121, so that the driving shaft 141 can drive the cleaning brush 144 to move relative to the first screen plate 121 during rotation, so as to clean the coal powder on the first screen plate 121 and prevent the first screen hole 1211 from being blocked. The bristles of the cleaning brush 144 may be made of a composite material of nylon 66 (PA66) and carbon fiber, which has the characteristics of wear resistance and antistatic properties, can prevent coal powder from adhering to the bristles, and is not easy to break.

[0045] According to some embodiments of this utility model, the screening assembly 120 further includes a worm 123 and a worm wheel 124. The worm wheel 124 is connected to the worm 123, the worm 123 is connected to the housing 110, and the worm wheel 124 is fixedly connected to the second screen plate 122. Specifically, the worm wheel 124 is located on the side of the second screen plate 122 opposite to the first screen plate 121. The worm wheel 124 and the second screen plate 122 can be fixedly connected by bolts or welded together. The worm 123 is connected to the peripheral wall of the housing 110 and meshes with the worm wheel 124. One end of the worm 123 is connected to a motor, which drives the worm 123 to rotate. The worm 123 drives the worm wheel 124 to rotate, thereby causing the second screen plate 122 to rotate relative to the first screen plate 121. In some embodiments, the coal crushing device 100 further includes a support member 126, which is an L-shaped plate. One end of the support member 126 is connected to the inner wall of the housing 110, forming a mounting groove between the support member 126 and the inner wall of the housing 110. The worm gear 124 is annular, and its peripheral wall is located within the mounting groove, so as to limit and support the worm gear 124 by means of the support member 126. There can be multiple support members 126, which are distributed along the circumference of the housing 110.

[0046] According to some embodiments of this utility model, the screening assembly 120 further includes an adjusting handwheel 125, which is connected to one end of the worm gear 123 and is located outside the housing 110. Specifically, the coal crushing device 100 also includes a sealing box 127, in which the worm gear 123 is disposed, and one end of the worm gear 123 extends out of the sealing box 127. The housing 110 has a through hole corresponding to the position of the worm wheel 124, which connects the interior and exterior of the housing 110. The sealing box 127 covers the through hole on the housing 110, and the worm gear 123 meshes with the worm wheel 124 through the through hole. The adjusting handwheel 125 is connected to the end of the worm gear 123 located outside the sealing box 127. The adjusting handwheel 125 can drive the worm gear 123 to rotate, thereby driving the worm wheel 124 to rotate, which in turn drives the second screen plate 122 to rotate relative to the first screen plate 121, thus adjusting the size of the screening channel.

[0047] The working process of this utility model is as follows: The coal sample to be processed enters the housing 110 through the feed inlet 111 and falls into the gap between the grinding block 142 and the guide seat 130. The drive motor 140 drives the drive shaft 141 to rotate, and the drive shaft 141 drives the grinding block 142 to rotate, so as to impact and crush the coal, thereby breaking the coal. The crushed coal falls onto the first screen plate 121, and under the action of the cleaning brush 144, coal powder and coal particles of a certain size fall into the second chamber 114 through the first screen hole 1211 and the second screen hole 1221. In the second chamber 114, the drive shaft 141 drives the stirring blade 143 to rotate, so as to agitate the coal, and the hot air blower 150 blows hot air to dry the coal. The dried coal is conveyed from the discharge port 112 to the analyzer 200 for testing.

[0048] In summary, this utility model embodiment provides a coal crushing device 100 and a coal quality testing device. The coal crushing device 100 crushes and grinds the coal using grinding blocks 142, and collects the crushed coal into a second chamber 114. A hot air blower 150 is connected to the second chamber 114 to deliver hot air to the second chamber 114 to dry the coal. The coal crushing and drying process is completed by the coal crushing device 100, eliminating the need for manual sample transfer, reducing testing errors, saving steps, and improving testing efficiency. Furthermore, the size of the screening channel can be adjusted by rotating the second sieve plate 122 relative to the first sieve plate 121, achieving stepless adjustment and accommodating sample screening for different testing needs. Moreover, the second sieve plate 122 is driven to rotate by a worm gear 124 and a worm 123. The self-locking characteristic between the worm gear 124 and the worm 123 ensures that the second sieve plate 122 and the first sieve plate 121 do not experience relative displacement during operation, ensuring the stability of the screening channel.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate this utility model and are not intended to limit it. It should be pointed out that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A coal crushing device (100), characterized in that, include: A housing (110) is provided with an inlet (111) and an outlet (112); A screening component (120) is disposed inside the housing (110) and divides the housing (110) into a first chamber (113) and a second chamber (114) that are in communication with each other. The first chamber (113) is in communication with the feed inlet (111), and the second chamber (114) is in communication with the discharge outlet (112). A flow guide seat (130) is disposed in the first chamber (113) and located below the feed inlet (111); Grinding block (142), the grinding block (142) is disposed inside the flow guide seat (130), there is a gap between the peripheral wall of the grinding block (142) and the inner wall of the flow guide seat (130), the grinding block (142) can rotate relative to the flow guide seat (130) to crush coal; A hot air blower (150) is connected to the housing (110), and the air outlet of the hot air blower (150) is connected to the second chamber (114).

2. The coal crushing device (100) according to claim 1, characterized in that, The hot air blower (150) is located on the periphery of the second chamber (114).

3. The coal crushing device (100) according to claim 1, characterized in that, The coal crushing device (100) also includes a drive shaft (141), which passes through the first chamber (113) and the second chamber (114), and both ends of the drive shaft (141) are rotatably connected to the housing (110), and the grinding block (142) is connected to the drive shaft (141).

4. The coal crushing device (100) according to claim 3, characterized in that, The coal crushing device (100) also includes a stirring blade (143), which is disposed in the second chamber (114) and connected to the drive shaft (141).

5. The coal crushing device (100) according to claim 4, characterized in that, The bottom wall of the second chamber (114) is an inclined surface and is inclined toward the side where the discharge port (112) is located.

6. The coal crushing device (100) according to claim 3, characterized in that, The coal crushing device (100) also includes a cleaning brush (144), which is disposed in the first chamber (113) and connected to the drive shaft (141). The bristles of the cleaning brush (144) contact the side of the screening component (120) facing the first chamber (113).

7. The coal crushing device (100) according to claim 1, characterized in that, The screening assembly (120) includes a first sieve plate (121) and a second sieve plate (122). The second sieve plate (122) is disposed on the side of the first sieve plate (121) facing the second chamber (114). The first sieve plate (121) is provided with a first sieve hole (1211), and the second sieve plate (122) is provided with a second sieve hole (1221) communicating with the first sieve hole (1211). The first sieve plate (121) is connected to the housing (110), and the second sieve plate (122) is rotatable relative to the first sieve plate (121).

8. The coal crushing device (100) according to claim 7, characterized in that, The screening assembly (120) further includes a worm (123) and a worm wheel (124), the worm wheel (124) being connected to the worm (123), the worm (123) being connected to the housing (110), and the worm wheel (124) being fixedly connected to the second sieve plate (122).

9. The coal crushing device (100) according to claim 8, characterized in that, The screening assembly (120) further includes an adjusting handwheel (125), which is connected to one end of the worm gear (123) and is located outside the housing (110).

10. A coal quality testing device, characterized in that, include: The coal crushing apparatus (100) according to any one of claims 1 to 9; The analyzer (200) is connected to the discharge port (112).

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