A moisture measuring instrument for coal product moisture detection

Abstract

This invention discloses a moisture measuring instrument for detecting the moisture content of coal products, belonging to the field of coal product testing. The device includes: a furnace body, a furnace cover, and a material tray. The furnace body has a weighing platform inside, and the furnace cover is connected to a support plate that supports the material tray. When the furnace cover is closed to the furnace body, the material tray is placed on the weighing platform via the support plate, and the support plate does not apply any vertical force to the material tray at this time. The furnace cover is connected to a turning mechanism that turns the material in the material tray. This invention integrates the turning mechanism with the furnace cover, and allows the support plate to automatically separate during weighing. It achieves dynamic turning and accurate real-time weighing during the drying process simultaneously in a closed space, completely breaking the limitations of traditional static drying, accelerating the evaporation of moisture from the coal product, solving the problems of long drying time and low efficiency, significantly improving the speed and accuracy of moisture detection, and reducing energy costs.

Description

Technical Field

[0001] This invention relates to the field of coal product testing, and in particular to a moisture measuring instrument for detecting the moisture content of coal products. Background Technology

[0002] Coal products are mainly used as fuel and chemical raw materials. During the coal mining process, the moisture content of coal is relatively high. Therefore, when using coal as an energy source, it is necessary to test the moisture content of the coal products in order to ensure the full release of heat.

[0003] In existing technologies, when testing the moisture content of coal products, the drying and weighing method is usually used. This involves weighing the total weight of the coal product, heating it to separate the moisture from the coal product as steam, and then weighing the dried coal product again. The moisture content is determined by the weight difference.

[0004] The existing measurement method has certain drawbacks: for example, the coal product needs to be placed in a sealed drying oven for drying during the test, which makes it impossible to turn the coal product over during the drying process. In this case, the surface moisture of the coal product can be dried, but the inside of the coal product often cannot be dried quickly. It is necessary to increase the drying time to ensure that the drying is sufficient. As a result, this test method is not only time-consuming, but also consumes a lot of energy. It is not only inefficient, but also costly. Summary of the Invention

[0005] This invention provides a moisture meter for detecting the moisture content of coal products. By using a turning mechanism connected to the furnace cover, the material in the tray is turned over, which solves the problems of low measurement efficiency and high measurement cost in the prior art where coal products are placed in a closed drying oven and cannot be turned over, resulting in slow drying of internal moisture.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution: A moisture measuring instrument for detecting the moisture content of coal products includes: a furnace body, a furnace cover, and a material holding tray. The furnace body has a weighing platform inside, and the furnace cover is connected to a support plate for supporting the material holding tray. When the furnace cover is closed with the furnace body, the material holding tray is placed on the weighing platform via the support plate, and at this time, the support plate does not apply a vertical force to the material holding tray, thereby achieving weighing via the weighing platform. The furnace cover is also connected to a material turning mechanism for turning over the material in the material holding tray.

[0007] As a preferred embodiment of the present invention, the furnace body is connected to a lifting assembly, which is connected to the furnace cover and is used to drive the furnace cover to move up and down, thereby realizing the opening and closing between the furnace body and the furnace body.

[0008] As a preferred embodiment of the present invention, the pallet has an annular structure and the upper edge of the material tray has an outwardly facing flange for the pallet to support the lower surface of the flange. After the material tray is placed on the weighing platform, the pallet separates from the flange.

[0009] As a preferred embodiment of the present invention, the material turning mechanism includes a transmission shaft rotatably connected to the furnace cover and a drive device 1 fixedly connected to the furnace cover; the upper end of the transmission shaft is connected to the drive device 1, and the lower end of the transmission shaft is connected to a material-pushing crossbar, which is used to turn the material in the material tray by driving the material-pushing crossbar to rotate.

[0010] As a preferred embodiment of the present invention, the rotation center of the material-pushing crossbar is coaxially arranged with the material-holding tray, and the material-pushing crossbar is arranged radially along the material-holding tray; the material-pushing crossbar is evenly connected with vertically arranged material-pushing rods, which are used to extend into the material-holding tray through the lower end of the material-pushing rods, and the material-pushing rods are used to turn over the material in the material-holding tray by rotating the material-pushing crossbar.

[0011] As a preferred embodiment of the present invention, a row of comb bars is arranged in a radial array on the inner bottom wall of the material holding tray, and the comb bars and the material feeding rods are staggered one by one; the tray plate is provided with several limiting slots, and the outer wall of the material holding tray is fixedly connected with a locking block that cooperates with the limiting slots one by one, which is used to limit the rotation of the material holding tray in the circumferential direction, and the material feeding rod is driven to rotate by the material feeding crossbar, and the material feeding rod cooperates with the comb bars to realize the crushing of large-volume materials.

[0012] As a preferred embodiment of the present invention, the material turning mechanism further includes a tray cover, which is connected to the furnace cover via a connecting rod. The tray cover is used to close the material in the material holding tray when the material is turned over by the material turning rod. The tray cover is rotatably connected to a connecting shaft, the material turning crossbar is connected to the lower end of the connecting shaft, and the connecting shaft is connected to the transmission shaft.

[0013] In a preferred embodiment of the present invention, the connecting rod is a lead screw, and the furnace cover is fixedly connected to a second driving device that is connected to the connecting shaft; the tray cover is fixedly connected to a mounting bracket, and the mounting bracket is connected to a nut that cooperates with the connecting shaft, for rotating the connecting shaft and driving the tray cover to move up and down through the nut, thereby realizing the opening and closing between the tray and the material holding tray; wherein, the mounting bracket is rotatably connected to a bushing, the bushing is connected to the drive shaft through a sliding key, and the bushing is connected to the connecting shaft through a transmission connection.

[0014] As a preferred embodiment of the present invention, the mounting frame is movably interspersed with several guide rods, and a mounting plate is fixedly connected to the several guide rods. The mounting plate is located below the mounting frame, and the nut is fixedly connected to the mounting plate. When the tray cover and the material holding tray are closed, the connecting shaft continues to rotate, causing the nut to drive the mounting plate to move down and separate from the mounting frame, thereby realizing the overall weighing of the tray cover and the material holding tray.

[0015] As a preferred embodiment of the present invention, the furnace body is further provided with an air inlet, and the furnace cover is connected to an exhaust outlet.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention has a turning mechanism connected to the furnace cover, which turns the material in the tray during the drying process of the coal product in the drying furnace. This helps to improve the evaporation efficiency of the internal moisture of the coal product, ensures that the coal product can be dried quickly, effectively reduces the drying time and energy consumption required for measurement, improves the measurement efficiency, and reduces the overall measurement cost.

[0017] 2. This invention features a row of comb-tooth bars arranged radially along the bottom wall of the material tray, with the comb-tooth bars and the material-pulling bars staggered one by one. The material-pulling bar drives the material-pulling bars to rotate. By cooperating with the comb-tooth bars, the material-pulling bars can not only turn over the material in the material tray, but also crush larger materials, thereby further improving the evaporation rate of moisture and enhancing the measurement efficiency. Attached Figure Description

[0018] Figure 1 This invention provides a schematic diagram of a moisture measuring instrument for detecting moisture in coal products. Figure 2 for Figure 1 The main view; Figure 3 for Figure 2 Top view; Figure 4 for Figure 3 Sectional view at point AA; Figure 5 This is a structural diagram of the furnace cover and support plate; Figure 6 A structural diagram of the pallet, the material tray, and the tray cover; Figure 7 Exploded view of the furnace lid, material tray, and tray cover; Figure 8 This is a schematic diagram of the tray cover structure; Figure 9 This is a structural diagram of the nut and mounting plate; Figure 10 This is a schematic diagram of the structure of the material holding tray; Figure 11 This is a schematic diagram of the material feeding rod and comb rod during crushing; Figure 12 This is a schematic diagram showing the structure when both the furnace lid and the tray lid are open. Figure 13 This is a schematic diagram of the structure when the pallet cover and the material tray are closed. Figure 14 for Figure 13 The front view; Figure 15 This is a schematic diagram of the structure during weighing; Figure 16 This is a schematic diagram of the structure during drying.

[0019] Explanation of reference numerals in the attached figures: 1-Furnace body, 2-Furnace cover, 3-Material tray, 4-Drive shaft, 5-Tray cover, 101-Weighing platform, 102-Lifting assembly, 103-Air inlet, 201-Pattern, 202-Limiting slot, 203-Exhaust port, 301-Flanged edge, 302-Comb bar, 303-Card block, 401-Drive device one, 402-Material guide bar, 403-Material guide rod, 404-Shaft sleeve, 501-Connecting rod, 502-Connecting shaft, 503-Drive device two, 504-Mounting bracket, 505-Thread nut, 506-Guide rod, 507-Mounting plate. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] Example 1 In the moisture detection of coal products, the drying and weighing method is the standard approach. Existing equipment places the coal product in a sealed drying oven for heating, but during the entire drying process, the coal product remains in a static, piled-up state. This results in rapid evaporation of moisture from the surface layer, while the moisture in the inner layer, being encased and covered, cannot escape quickly, requiring extended drying time to ensure complete evaporation. This method not only consumes a lot of energy and time per test, but also significantly slows down the overall detection efficiency and increases testing costs.

[0022] like Figures 1 to 4 As shown, in order to solve the above-mentioned technical problems, the present invention provides a moisture measuring instrument for detecting the moisture content of coal products, including a furnace body 1, a furnace cover 2 and a material tray 3. The furnace body 1 has a weighing platform 101 inside, which is used to weigh the material in real time (such as by using a weighing sensor). This is the prior art and will not be described in detail in this embodiment.

[0023] The furnace cover 2 is connected to a support plate 201, which is used to support the material tray 3. When the furnace cover 2 is closed with the furnace body 1, the material tray 3 is placed on the weighing platform 101 through the support plate 201. At this time, the support plate 201 does not apply vertical force to the material tray 3, so that the material tray 3 can be weighed through the weighing platform 101.

[0024] In order to ensure that the pallet 201 can support the material tray 3 without interfering with the weighing of the material tray 3, it is necessary to ensure that the pallet 201 can separate from the material tray 3 when the material tray 3 is placed on the weighing platform 101 for weighing, so as not to exert a force on the material tray 3 in the vertical direction. At this time, it can be ensured that the weight weighed by the weighing platform 101 is only the sum of the weight of the material tray 3 and the coal product inside it.

[0025] Therefore, such as Figure 5 and Figure 7 As shown, the pallet 201 has an annular structure, and the upper edge of the material tray 3 has an outwardly facing flange 301, which is used to support the entire material tray 3 by placing the material tray 3 inside the pallet 201 and using the pallet 201 to support the lower surface of the flange 301.

[0026] Furthermore, after the furnace cover 2 is closed with the furnace body 1, the material tray 3 is placed on the weighing platform 101. The position of the pallet 201 is lower than the flange 301, that is, the pallet 201 is separated from the flange 301, so that the material tray 3 is no longer subjected to the vertical force of the pallet 201, ensuring the accuracy of the measurement.

[0027] The furnace cover 2 is also connected to a material-turning mechanism, which is used to turn the material in the material tray 3. At the same time, since the furnace cover 2 itself has a certain weight, and the furnace cover 2, the tray 201 and the material tray 3 are a whole, moving up and down synchronously with the opening and closing of the furnace cover 2, it is necessary to ensure the ease of opening and closing of the furnace cover 2, and at the same time, it is necessary to ensure that no large shaking occurs during the opening and closing of the furnace cover 2, so as to avoid the coal product from spilling out.

[0028] Therefore, a lifting assembly 102 is connected to the furnace body 1. The lifting assembly 102 can be directly made of a cylinder. The telescopic rod of the cylinder is connected to the furnace cover 2 and is used to drive the furnace cover 2 to move smoothly up and down, so as to open and close with the furnace body 1.

[0029] Its working process and principle are as follows: Filling and closing: such as Figure 12As shown, the lifting assembly 102 raises the furnace cover 2. The operator places the material tray 3 containing coal products onto the pallet 201, which is supported by the flange 301 on the upper edge of the material tray 3. Subsequently, the lifting assembly 102 drives the furnace cover 2 to descend, and the material tray 3 first enters the furnace body 1 along with the furnace cover 2.

[0030] After the bottom of the material tray 3 contacts the weighing platform 101, the furnace cover 2 continues to descend a certain distance, and the pallet 201 gradually separates from the flange 301 of the material tray 3. Figure 4 and Figure 15 As shown. At this time, the material tray 3 is completely placed on the weighing platform 101, and the pallet 201 does not exert any vertical force on it. The weighing platform 101 begins to independently and accurately weigh the initial weight of the coal product.

[0031] Drying and Turning: After the furnace cover 2 is fully closed, the furnace body 1 begins heating and drying. During the drying process, the turning mechanism is activated, and its lower part extends into the material tray 3 to turn the coal product. The turning action turns the coal product that was originally pressed at the bottom to the surface, so that all parts of the coal product are heated evenly, the dehydration rate is consistent, and the evaporation of internal moisture is accelerated.

[0032] Real-time weighing and judgment: Weighing platform 101 continuously monitors weight changes during the drying process. When the weight stops decreasing within a set time, it indicates that the moisture has been completely evaporated, and drying can be stopped at this point. Based on the weight taken at this time and the weight before drying, the moisture content is calculated, and the moisture measurement is completed.

[0033] It should be emphasized that the core improvement of this embodiment lies in integrating the material turning mechanism with the furnace cover 2 and designing a mechanical structure for automatic separation of the pallet 201. This enables the equipment to simultaneously achieve dynamic material turning and interference-free, accurate, real-time weighing during the drying process within a confined space. This completely breaks through the limitations of traditional static drying methods, significantly accelerates the evaporation of internal moisture in the coal product, solves the problems of long drying time and low efficiency, significantly improves the speed and accuracy of moisture detection, and reduces energy consumption costs.

[0034] It should be noted that, such as Figure 1 As shown, the furnace body 1 is also provided with an air inlet 103 for introducing dry protective gas (such as nitrogen) or air. The furnace cover 2 is connected to an exhaust port 203 for timely discharge of evaporated water vapor from the furnace body 1, maintaining a dry atmosphere inside the furnace, which is beneficial for accelerating moisture evaporation.

[0035] Example 2 Based on Example 1, the material in the material tray 3 is turned over by a turning mechanism. The simplest way is to turn over the coal products inside by rotating the material tray 3 along the circumference.

[0036] Therefore, the material turning mechanism includes a drive shaft 4 rotatably connected to the furnace cover 2, and a drive device 401 fixedly connected to the furnace cover 2. The upper end of the drive shaft 4 is connected to the drive device 401, and the lower end of the drive shaft 4 is connected to a material-pushing crossbar 402, which is used to turn the material in the material tray 3 by driving the material-pushing crossbar 402 to rotate.

[0037] However, if only the structure of the material-pushing crossbar 402 is used, since the material-pushing crossbar 402 is a whole rod, its rotation may push the coal product to move together, causing the coal product to accumulate at the position of the material-pushing crossbar 402. The moisture of the coal product accumulated here still evaporates slowly.

[0038] like Figure 4 , Figure 7 and Figure 8 As shown, the rotation center of the material-dispensing crossbar 402 is coaxially arranged with the material-holding tray 3, and the material-dispensing crossbar 402 is arranged radially along the material-holding tray 3. Vertically arranged material-dispensing rods 403 are evenly distributed and connected to the material-dispensing crossbar 402, forming a rake-like structure. The lower ends of the material-dispensing rods 403 extend into the material-holding tray 3, and by rotating the material-dispensing crossbar 402, the material-dispensing rods 403 agitate the material within the material-holding tray 3, resulting in a more thorough and uniform agitation of the coal products contained within the material-holding tray 3.

[0039] Understandably, in the above scheme, the material turning mechanism turns the coal product in the holding tray 3 by means of the material turning rod 403. However, during the rotation and turning of the material turning rod 403, coal product particles may be turned out of the edge of the holding tray 3 and fall into the furnace body 1, which not only causes sample loss and affects measurement accuracy, but may also contaminate the furnace.

[0040] Meanwhile, if the material-pushing crossbar 402 in the material-turning mechanism is completely exposed to rotate within the furnace space, pulverized coal may also splash into various parts of the furnace.

[0041] To address the aforementioned issues of preventing material spills and splashes, such as Figure 4 , Figures 6 to 8 As shown, the material-turning mechanism also includes a tray cover 5. The tray cover 5 is connected to the furnace cover 2 via a connecting rod 501, so that it is positioned directly above the material-holding tray 3.

[0042] The tray cover 5 is rotatably connected to a connecting shaft 502, and a material-shifting crossbar 402 is connected to the lower end of the connecting shaft 502. The connecting shaft 502 is also connected to the drive shaft 4 via a chain drive. The material-shifting crossbar 402 is rotatably connected to the connecting shaft 502 below the tray cover 5. When the material in the holding tray 3 is turned over by the material-shifting rod 403, the tray cover 5 closes to the holding tray 3.

[0043] The working process is as follows: During the closing of the furnace cover 2, the tray cover 5 descends along with the furnace cover 2 and finally closes on the port of the material tray 3. In the subsequent drying and turning process, the drive shaft 4 drives the connecting shaft 502 to rotate, which in turn drives the material-pushing crossbar 402 to rotate within the closed cavity formed by the tray cover 5 and the material tray 3, causing the material-pushing rod 403 to turn the coal product. The presence of the tray cover 5 effectively prevents the coal product from being thrown out or splashed out of the material tray 3 during turning, ensuring the integrity of the sample quantity and the accuracy of the measurement during the drying process.

[0044] It should be emphasized that the core improvement of this embodiment is that a tray cover 5 that rises and falls synchronously with the furnace cover 2 is added to the material turning mechanism. When turning the material, the tray 3 is closed, which solves the technical problem of material splashing and loss during dynamic turning and ensures the reliability of the weighing data.

[0045] However, the above solution still has some drawbacks. Although the pallet cover 5 seals the material tray 3 to prevent coal products from splashing, this locks the evaporating moisture between the pallet cover 5 and the material tray 3, preventing it from detaching quickly and affecting the evaporation of moisture.

[0046] Therefore, when designing the scheme, it should be possible to close the material tray 3 by flipping the tray cover 5. After flipping, the tray cover 5 and the material tray 3 need to be separated and opened so that the material tray 3 is open and the moisture can escape quickly.

[0047] Specifically, the connecting rod 501 is a lead screw, and the furnace cover 2 is fixedly connected to a drive device 503 that is connected to the connecting shaft 502. The tray cover 5 is welded or screwed to a mounting bracket 504, and the mounting bracket 504 is connected to a nut 505 that mates with the connecting shaft 502. This nut 505 is used to drive the tray cover 5 to move up and down through the rotation of the connecting shaft 502, thereby opening and closing the tray cover 5 with the material holding tray 3.

[0048] like Figure 15 As shown, when it is necessary to turn the coal product, the drive device 503 drives the connecting rod 501 to rotate, and the thread nut 505 drives the tray cover 5 to move downward and close with the material tray 3, thereby sealing the material tray 3. At this time, the bushing 404 drives the connecting shaft 502 to drive the coal product, thereby turning it over.

[0049] like Figure 16 As shown, after the flipping is completed, the drive device 2 503 drives the connecting rod 501 to reverse, the tray cover 5 moves upward and separates from the material tray 3. At this time, the material tray 3 is open, which facilitates the drying of coal products.

[0050] The method of lifting the pallet cover 5 also brings new problems. For example, since the pallet cover 5 needs to be lifted, and the connecting shaft 502 is located on the pallet cover 5 in the above scheme, but the transmission between the transmission shaft 4 and the connecting shaft 502 needs to be satisfied, the traditional simple transmission method cannot flexibly adapt to the transmission under this working condition.

[0051] Therefore, such as Figure 6 , Figure 8 , Figure 15 and Figure 16 As shown, the mounting bracket 504 is rotatably connected to the bushing 404. The bushing 404 is connected to the drive shaft 4 via a sliding key, so that the bushing 404 and the drive shaft 4 can be relatively fixed in the axial direction and also limited in the circumferential direction. The bushing 404 is connected to the connecting shaft 502 through a transmission connection, so that the drive shaft 4 drives the bushing 404 to rotate, and the bushing 404 drives the connecting shaft 502 to rotate. When the tray cover 5 is raised or lowered, the mounting bracket 504 can drive the bushing 404 to move synchronously, thereby meeting the above design requirements and the desired technical effect.

[0052] Example 3 In Example 2, the method of turning the coal product by the material-dispensing rod 403 to improve moisture evaporation and the method of covering the material tray 3 with the tray cover 5 to prevent coal product from splashing are both achieved. However, in actual use, it was found that there are still some drawbacks. After the material-dispensing rod 403 turns the coal product and the tray cover 5 moves up and separates from the material tray 3, some coal product will stick to the material-dispensing rod 403. This part of the coal product will detach from the material tray 3, which will result in the weight measured after drying being less than the actual weight, thus affecting the accuracy of moisture measurement.

[0053] The most direct way to solve this problem is to weigh the pallet cover 5 together with the material holding pallet 3 during weighing. This way, even if some coal products stick to the material feeding rod 403, the weighing pallet cover 5 and the material holding pallet 3 are a whole, which will not affect the overall measurement result.

[0054] To achieve the above design objectives, the pallet cover 5 must remain freely placed on the material tray 3 during weighing, meaning that the pallet cover 5 must not be subjected to any vertical forces other than those acting on the material tray 3.

[0055] Therefore, such as Figure 6 , Figure 8 , Figure 9 and Figure 14As shown, the mounting frame 504 has four guide rods 506 that are movably inserted, and a mounting plate 507 is fixedly connected to the four guide rods 506. The mounting plate 507 is located below the mounting frame 504, and the nut 505 is fixedly connected to the mounting plate 507, which restricts the circumferential rotation of the nut 505. It can only move axially through the guide rods 506. When the tray cover 5 and the material tray 3 are closed, the connecting shaft 502 continues to rotate, causing the nut 505 to drive the mounting plate 507 to move down and separate from the mounting frame 504, so as to realize the overall weighing of the tray cover 5 and the material tray 3.

[0056] The specific work process is divided into two stages: Material turning stage: Drive device 2 503 drives the connecting rod 501 to rotate through the transmission mechanism. The nut 505 moves downward along the connecting rod 501, driving the mounting frame 504 and the tray cover 5 to descend as a whole until the tray cover 5 is pressed tightly onto the material holding tray 3.

[0057] Weighing decoupling stage: After the tray cover 5 is closed, the connecting rod 501 continues to rotate. At this time, the nut 505 will continue to move downward along the connecting rod 501. The continued downward movement of the nut 505 will drive the mounting plate 507 to slide downward along the guide rod 506 and gradually separate from the mounting bracket 504.

[0058] When the mounting plate 507 is completely detached from the mounting bracket 504, that is, the tray cover 5 will not be subjected to the vertical force exerted on it by the mounting plate 507, at this time the weight of the tray cover 5, the connecting shaft 502, the mounting bracket 504, the material feeding crossbar 402, the material feeding rod 403 and the bushing 404 will be fully applied to the material holding tray 3.

[0059] like Figure 15 As shown, the pallet cover 5 and the material holding tray 3 are weighed as a whole before drying. After turning and drying, the pallet cover 5 and the material holding tray 3 are weighed as a whole again. At this time, even if the coal product sticks to the feeding rod 403, it is still weighed as a whole, so as not to affect the overall measurement result.

[0060] It should be emphasized that the core improvement of this embodiment lies in the design of a mechanical decoupling mechanism. Through the continuous rotation of the connecting rod 501, the tray cover 5 is first closed, and then the mounting plate 507 is further driven to separate from the mounting frame 504, so that the weight of all components of the flipping mechanism is completely separated from the weighing link. The problem of weighing interference in the covered flipping system is solved with ingenious mechanical action, ensuring high-precision real-time weighing.

[0061] Example 4 Understandably, during the material turning process in Examples 2 and 3, the coal product, under the combined effects of heating and turning, may agglomerate into coal lumps of varying sizes due to uneven local moisture distribution. This agglomeration is particularly pronounced for certain coal types, or the coal sample itself may be in lumps or large granular form. In such cases, simply turning the coal with the material-turning rod can only change the position of the coal lumps but cannot break them up. The moisture inside the coal lumps remains difficult to evaporate, leading to inaccurate judgment of the drying endpoint or a forced extension of the drying time.

[0062] To address the problem of coal product agglomeration and breakage during the material handling process, such as... Figure 4 , Figure 8 , 10 and Figure 11 As shown, a row of comb bars 302 is arranged in a radial array on the inner bottom wall of the material tray 3. Correspondingly, the material pushing bar 403 connected to the material pushing crossbar 402 is arranged in a radially staggered manner with the comb bars 302, forming a structure similar to the staggered arrangement of comb teeth.

[0063] Meanwhile, to prevent the material tray 3 from rotating during material feeding, such as Figure 5 , Figure 7 and Figure 15 As shown, at least one limiting slot 202 is provided on the pallet 201, and a corresponding locking block 303 is fixedly connected to the outer wall of the material tray 3. When the material tray 3 is placed on the pallet 201, the locking block 303 engages in the limiting slot 202, thereby limiting the circumferential rotation of the material tray 3.

[0064] Its working principle is as follows: Figure 11 As shown, when the feeding crossbar 402 drives the feeding rod 403 to rotate, the fixed comb rod 302 remains stationary. Pushed by the feeding rod 403, the coal block moves to the position of the comb rod 302, where it is clamped between the rotating feeding rod 403 and the fixed comb rod 302, and is crushed by forced shearing and compression. This process is completed automatically during the tumbling process, requiring no additional operation.

[0065] It should be emphasized that the core improvement of this embodiment lies in the following: a fixed comb bar is set at the bottom of the tray, which forms a shearing pair with the rotating material feeding bar. While turning the tray, it can crush agglomerated coal products or materials with large volume, thus solving the problem of internal moisture evaporation being hindered due to agglomeration during the drying process of coal products, further accelerating the drying process and improving the detection efficiency.

[0066] Based on the moisture measuring instrument for detecting the moisture content of coal products in the above embodiments, the present invention specifically includes the following steps when measuring the moisture content of coal products: Step 1: Filling and closing the lid; as follows Figure 12As shown, the lifting assembly 102 lifts the furnace cover 2 and rotates it via the connecting rod 501, causing the tray cover 5 to move upward and separate from the material tray 3, thus fully opening the material tray 3.

[0067] like Figure 13 and Figure 14 As shown, the coal sample to be tested is loaded into the material tray 3. The connecting rod 501 reverses, causing the tray cover 5 to move down and close with the material tray 3. This also causes the mounting plate 507 to move down and separate from the mounting frame 504.

[0068] like Figure 15 As shown, the furnace cover 2 is then driven to descend by the lifting assembly 102. After the bottom of the material tray 3 contacts the weighing platform 101, the tray plate 201 separates from the tray flange 301. After the furnace cover 2 is fully closed, the initial weight of the weighing platform 101 is recorded.

[0069] Step Two: Turning and Drying the Material; as follows Figure 16 As shown, the drive device 2 503 is started, causing the tray cover 5 to rise and separate from the material tray 3, so that the material tray 3 is open, and then the furnace body 1 is heated and dried.

[0070] like Figure 4 As shown, when moisture evaporation slows down, the tray cover 5 moves down and closes with the material tray 3. Then, the drive shaft 4 and connecting shaft 502 drive the material-pushing crossbar 402 to rotate. The material-pushing bar 403 flips the coal product and cooperates with the comb bar 302 to crush and break up the lumpy coal product. After flipping, the tray cover 5 is moved up again to continue drying.

[0071] Step 3: Endpoint Determination and Shutdown; Weighing platform 101 monitors weight changes in real time. When the reading on weighing platform 101 stops decreasing within a set time, it indicates that the moisture has completely evaporated. At this point, the tray cover 5 is moved down again, and the weighing process in Step 1 is repeated. The weight at this time is recorded. Finally, the heating is turned off, the lifting assembly 102 raises the furnace cover 2, and the material tray 3 is removed. The moisture content of the coal product is measured using the weight difference between the two measurements, thus completing the test.

[0072] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. A moisture measuring instrument for detecting the moisture content of coal products, comprising a furnace body (1), a furnace cover (2), and a material tray (3), characterized in that, The furnace body (1) has a weighing platform (101) inside. The furnace cover (2) is connected to a support plate (201) for supporting the material tray (3) through the support plate (201). When the furnace cover (2) is closed with the furnace body (1), the material tray (3) is placed on the weighing platform (101) through the support plate (201). At this time, the support plate (201) does not apply a vertical force to the material tray (3), so that the weighing is carried out through the weighing platform (101). The furnace cover (2) is also connected to a material turning mechanism, which is used to turn the material in the material tray (3) over.

2. The moisture measuring instrument for detecting moisture in coal products as described in claim 1, characterized in that, The furnace body (1) is connected to a lifting assembly (102), which is connected to the furnace cover (2) to drive the furnace cover (2) to move up and down, thereby opening and closing with the furnace body (1).

3. The moisture measuring instrument for detecting moisture in coal products as described in claim 1 or 2, characterized in that, The pallet (201) has an annular structure, and the upper edge of the material tray (3) has an outwardly facing flange (301) for the pallet (201) to support the lower surface of the flange (301). After the material tray (3) is placed on the weighing platform (101), the pallet (201) and the flange (301) are separated.

4. The moisture measuring instrument for detecting moisture in coal products as described in claim 3, characterized in that, The material turning mechanism includes a transmission shaft (4) rotatably connected to the furnace cover (2) and a drive device (401) fixedly connected to the furnace cover (2). The upper end of the drive shaft (4) is connected to the drive device (401), and the lower end of the drive shaft (4) is connected to the material-pushing crossbar (402), which is used to rotate the material-pushing crossbar (402) to flip the material in the material tray (3).

5. The moisture measuring instrument for detecting moisture in coal products as described in claim 4, characterized in that, The rotation center of the material-pushing crossbar (402) is coaxially arranged with the material-holding tray (3), and the material-pushing crossbar (402) is arranged radially along the material-holding tray (3); The material-pushing crossbar (402) is evenly connected with vertically arranged material-pushing rods (403), which are used to extend to the material tray (3) through the lower end of the material-pushing rod (403). By rotating the material-pushing crossbar (402), the material-pushing rods (403) are used to turn the material in the material tray (3).

6. The moisture measuring instrument for detecting moisture in coal products as described in claim 5, characterized in that, The inner bottom wall of the material tray (3) is arranged with a row of comb bars (302) along the radial direction, and the comb bars (302) and the material feeding bars (403) are staggered one by one; The pallet (201) is provided with several limiting slots (202). The outer wall of the material holding tray (3) is fixedly connected with a locking block (303) that matches the limiting slot (202) one by one. This block is used to limit the rotation of the material holding tray (3) in the circumferential direction. The material pushing rod (403) is driven to rotate by the material pushing crossbar (402). The material pushing rod (403) is used in conjunction with the comb rod (302) to crush the material with a large volume.

7. The moisture measuring instrument for detecting moisture in coal products as described in claim 6, characterized in that, The material turning mechanism also includes a tray cover (5), which is connected to the furnace cover (2) via a connecting rod (501). When the material in the material holding tray (3) is turned over by the material turning rod (403), the tray cover (5) closes with the material holding tray (3). The tray cover (5) is rotatably connected to a connecting shaft (502), the material feeding crossbar (402) is connected to the lower end of the connecting shaft (502), and the connecting shaft (502) is connected to the transmission shaft (4).

8. The moisture measuring instrument for detecting moisture in coal products as described in claim 7, characterized in that, The connecting rod (501) is a lead screw, and the furnace cover (2) is fixedly connected to a second driving device (503) that is connected to the connecting shaft (502). The tray cover (5) is fixedly connected to a mounting bracket (504), and the mounting bracket (504) is connected to a nut (505) that cooperates with the connecting shaft (502). The nut (505) is used to rotate the connecting shaft (502) and drive the tray cover (5) to move up and down through the nut (505) to realize the opening and closing between the tray cover (5) and the material tray (3). The mounting bracket (504) is rotatably connected to a bushing (404), which is connected to the transmission shaft (4) via a sliding key, and is also connected to the connecting shaft (502) via a transmission connection.

9. The moisture measuring instrument for detecting moisture in coal products as described in claim 8, characterized in that, The mounting frame (504) has several guide rods (506) movably inserted, and a mounting plate (507) is fixedly connected to the guide rods (506). The mounting plate (507) is located below the mounting frame (504), and the nut (505) is fixedly connected to the mounting plate (507). When the tray cover (5) and the material tray (3) are closed, the connecting shaft (502) continues to rotate, so that the nut (505) drives the mounting plate (507) to move down and separate from the mounting frame (504), so as to realize the overall weighing of the tray cover (5) and the material tray (3).

10. The moisture measuring instrument for detecting moisture in coal products as described in claim 1, characterized in that, The furnace body (1) is also provided with an air inlet (103), and the furnace cover (2) is connected to an exhaust outlet (203).

Images