Material division equipment

Abstract

The invention discloses material division equipment which comprises a control module, a base, a rack, a feeding hopper, a plurality of sample hoppers, a feeding pipe, a position monitoring block, a weight sensor and a variable frequency motor. The plurality of sample hoppers and a feed opening of the feed hopper are concentrically arranged, and the plurality of sample hoppers comprise at least one reserved sample hopper and more than two rejected sample hoppers. The upper end of the feeding pipe is pivotally connected with the feed opening, and the lower end of the feeding pipe extends towards the sample hopper; the control module can adjust the power of the variable frequency motor according to the preset reserved sample mass so as to adjust the rotating speed of the feeding pipe above the reserved sample hopper and the rejected sample hopper, so that the mass of a sample contained in the reserved sample hopper meets the requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of material reduction and division, and particularly to a material reduction and division device. Background Art

[0002] Coal sample preparation is a key link in coal detection and quality control. Through coal sample preparation (coal samples), a test sample representative of the entire batch of coal can be obtained, and comprehensive physical and chemical analyses can be performed on it to evaluate the quality and characteristics of the coal. When preparing coal samples, sample reduction and division is a relatively crucial step. The sample is distributed into multiple hoppers through a material reduction and division device for separate detection.

[0003] Existing reduction and division technologies include manual reduction and division and mechanical reduction and division. Manual reduction and division has the disadvantages of high labor intensity and easy generation of bias. Most mechanical reduction and division is fixed-ratio reduction and division, and the mass of coal samples in all hoppers is the same, so the mass of the target coal sample required for reduction and division cannot be accurately obtained. After removing the lower hopper, secondary weighing, addition or reduction are still required, and the work efficiency is low. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a new type of material reduction and division device. By presetting the retention mass in the retention hopper, the weighing sensor weighs the total mass of the sample poured into the feed hopper, and the control module automatically calculates the time required to stay at the retention mass, thereby correspondingly changing the power of the variable-frequency motor and adjusting the rotation speed of the lower end of the feed pipe above the retention hopper, so that the mass of the sample contained in the retention hopper meets the requirements, eliminating the need for secondary weighing, addition or reduction, and improving the work efficiency.

[0005] The technical solution of the present invention provides a material reduction and division device, including a control module, a base, a frame provided on the base, a feed hopper connected to the upper end of the frame, a plurality of sample hoppers evenly distributed along the circumferential direction on the base, a feed pipe for feeding materials to each sample hopper, a plurality of position monitoring blocks provided around each sample hopper and communicatively connected to the control module, a plurality of weight sensors provided on the top of the frame and communicatively connected to the control module, and a variable-frequency motor for driving the feed pipe to rotate;

[0006] A horizontally extending pressing plate is provided on the outer periphery of the feed hopper, and the pressing plate rests on the weight sensors;

[0007] The plurality of sample hoppers are concentrically arranged with the discharge opening of the feed hopper, wherein the plurality of sample hoppers include at least one retention hopper and two or more discard hoppers;

[0008] The upper end of the feed pipe is pivotally connected to the discharge opening, and the lower end of the feed pipe extends towards the sample hopper;

[0009] The control module can adjust the power of the variable-frequency motor according to the preset sample retention quality, so as to adjust the rotation speed of the feed pipe above the sample retention hopper and the reject sample hopper, so that the quality of the sample in the sample retention hopper meets the requirements.

[0010] In one of the alternative technical solutions, let: the total mass of the sample poured into the feed hopper be M 0 , and the material falling flow rate of the feed pipe be Q;

[0011] The total required mass of the sample in all the sample retention hoppers is M 1 , the number of the sample retention hoppers is n 1 , the number of the reject sample hoppers is n 2 , and the rotation radius of the lower end of the feed pipe is R;

[0012] The rotation speed of the lower end of the feed pipe above each sample retention hopper is V 1 , and the residence time is t 1 , and the power corresponding to the variable-frequency motor is P 1 ; the rotation speed of the lower end of the feed pipe above each reject sample hopper is V 2 , and the residence time is t 2 , and the power corresponding to the variable-frequency motor is P 2 ;

[0013] Then,

[0014] In one of the alternative technical solutions, a support rod is provided on one side of the top of the frame where the weight sensor is located;

[0015] When the weight sensor is compressed to the limit state, the pressing plate falls on the support rod.

[0016] In one of the alternative technical solutions, a support plate is provided in the frame;

[0017] The feed pipe includes a main pipe extending vertically, an inclined pipe connected to the lower end of the main pipe and extending obliquely downward, and a blanking pipe connected to the lower end of the inclined pipe and extending toward the sample hopper;

[0018] The upper end of the main pipe is pivotally connected to the blanking port, the main pipe passes through the support plate and is axially fixed to the support plate, and the main pipe can rotate relative to the support plate;

[0019] The variable-frequency motor is installed on the support plate, and the variable-frequency motor is connected to the main pipe through a transmission assembly.

[0020] In one of the alternative technical solutions, the transmission assembly includes a first gear disposed on the rotating shaft of the variable-frequency motor and a second gear disposed on the main pipe. The diameter of the first gear is smaller than that of the second gear, and the first gear meshes with the second gear.

[0021] In one of the alternative technical solutions, the discharge port is connected with a connecting pipe extending downward, and the connecting pipe is inserted into the main pipe;

[0022] The upper port of the main pipe is provided with a flange for sealing the gap;

[0023] A limiting ring for stopping the lower end of the connecting pipe is provided in the main pipe;

[0024] A pipe wall groove is formed on the inner surface of the main pipe between the flange and the limiting ring.

[0025] In one of the alternative technical solutions, the support plate is slidably connected to the frame, and the support plate can slide up and down relative to the frame;

[0026] An adjustment driving mechanism for driving the up-and-down adjustment of the support plate is provided between the frame and the support plate.

[0027] In one of the alternative technical solutions, two sets of the adjustment driving mechanisms are connected between the frame and the support plate, and the two sets of the adjustment driving mechanisms are located on opposite sides of the main pipe.

[0028] In one of the alternative technical solutions, positioning grooves are formed on the base corresponding to the positions of each of the sample hoppers, and the bottom of each of the sample hoppers is located in the positioning groove.

[0029] In one of the alternative technical solutions, any two adjacent sample hoppers are adjacent to each other.

[0030] Adopting the above technical solution, the following beneficial effects are achieved:

[0031] For the material reduction equipment provided by the present invention, a frame is provided on the base, the feed hopper is connected to the upper end of the frame, and a plurality of sample hoppers are evenly distributed on the base along the circumference, and the plurality of sample hoppers are concentrically arranged with the discharge port of the feed hopper. The upper end of the feeding pipe is pivotally connected to the discharge port, and the feeding pipe is driven by a variable-frequency motor to rotate, so as to feed materials to each of the sample hoppers below. The sample hoppers are divided into at least a retained sample hopper and a plurality of discarded sample hoppers, and the samples in the retained sample hopper are used for inspection.

[0032] During feeding, the feeding flow rate in the feeding pipe remains unchanged. Therefore, by presetting the retained sample mass in the retained sample hopper and weighing the total mass of the sample poured into the feeding hopper by the weighing sensor, the control module will automatically calculate the time required to stay at the retained sample mass, and then correspondingly change the power of the variable-frequency motor to adjust the rotation speed of the lower end of the feeding pipe above the retained sample hopper, so that the mass of the sample contained in the retained sample hopper meets the requirements, eliminating the need for secondary weighing, addition or subtraction, and improving work efficiency. Brief Description of the Drawings

[0033] Referring to the drawings, the disclosure of the present invention will become more readily understood. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0034] Figure 1 is a cross-sectional view of the material reduction equipment provided by an embodiment of the present invention;

[0035] Figure 2 is Figure 1 an enlarged view of part B in

[0036] Figure 3 is Figure 1 an enlarged view of part C in

[0037] Figure 4 is a schematic diagram of the connection of the adjustment drive mechanism, variable-frequency motor, transmission component, main pipe, support plate and frame;

[0038] Figure 5 is Figure 1 a cross-sectional view along the A-A direction;

[0039] Figure 6 is a top view of the base;

[0040] Figure 7 is Figure 6 a cross-sectional view along the D-D direction;

[0041] Figure 8 is a schematic diagram of the communication connection of each electrical component;

[0042] Figure 9 is a schematic diagram of the receiving end with position monitoring blocks provided on both sides of each sample hopper;

[0043] Figure 10 is a schematic diagram of the transmitting end with a position monitoring block provided at the lower end of the feeding pipe. Detailed Description of the Embodiment

[0044] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component, respectively.

[0045] As Figure 1 . Figures 4 - 5 and Figures 8 - 10 shown, a material splitting device provided by an embodiment of the present invention includes a control module 10, a base 1, a frame 2 provided on the base 1, a feed hopper 5 connected to the upper end of the frame 2, a plurality of sample hoppers 6 evenly distributed on the base 1 along the circumferential direction, a feed pipe 7 for feeding materials to each sample hopper 6, a plurality of position monitoring blocks 20 provided around each sample hopper 6 and communicatively connected to the control module 10, a plurality of weight sensors 8 provided on the top of the frame 1 and communicatively connected to the control module 10, and a variable frequency motor 4 for driving the feed pipe 8 to rotate.

[0046] A horizontally extending pressing plate 53 is provided on the outer periphery of the feed hopper 5, and the pressing plate 53 rests on the weight sensors 8.

[0047] The plurality of sample hoppers 6 are concentrically arranged with the discharge opening 51 of the feed hopper 5. Among them, the plurality of sample hoppers 6 include at least one retained sample hopper 61 and more than two discarded sample hoppers 62.

[0048] The upper end of the feed pipe 7 is pivotally connected to the discharge opening 51, and the lower end of the feed pipe 7 extends towards the sample hopper 6.

[0049] The control module 10 can adjust the power of the variable frequency motor 4 according to a preset retained sample quality to adjust the rotation speed of the feed pipe 7 above the retained sample hopper 61 and the discarded sample hopper 62, so that the quality of the sample contained in the retained sample hopper 61 meets the requirements.

[0050] The material splitting device provided by the present invention is used for splitting coal samples, that is, evenly dividing the coal samples to be detected into multiple portions for coal sample detection with various testing instruments. Ensure that the sample has sufficient cutting times (the coal sample preparation standard generally requires that the cutting times of general analysis samples are not less than 60 times). Calculate the residence time ratio of the lower end of the feed pipe 7 in the retained sample hopper 61 and the discarded sample hopper 62 according to the quality of the coal sample to be split and the quality of the target coal sample after splitting. Through the above operations, the sample to be split can be accurately split to the required quality.

[0051] The material splitting device includes a base 1, a frame 2, a variable frequency motor 4, a feed hopper 5, a plurality of sample hoppers 6, a feed pipe 7, weight sensors 8, a control module 10, position monitoring blocks 20, etc.

[0052] The base 1 can be a rectangular base or a circular base, which is used to be placed on the ground. Support legs can be provided at the bottom thereof, and rollers are configured on the support legs for movement.

[0053] The frame 2 can be a box structure, a cylindrical structure or a structure composed of multiple columns. The lower end of the frame 2 is fixed on the base 1, and can be welded or connected by bolts.

[0054] The variable-frequency motor 4 can adjust the power and is installed on the frame 2. The variable-frequency motor 4 is used to drive the feeding pipe 7 to rotate.

[0055] The feed hopper 5 is in the shape of a funnel with a wider upper part and a narrower lower part. It is installed at the top of the frame 2. The main body part of the feed hopper 5 is inside the frame 2. The feed inlet of the feed hopper 5 is above the frame 2. The lower end of the feed hopper 5 has a circular discharge opening 51, and the central axis of the discharge opening 51 is the 0-0 axis. The sample hopper 6 can be cylindrical or square-shaped, with an open top for feeding. A plurality of sample hoppers 6 are evenly distributed on the base 1. The plurality of sample hoppers 6 are arranged in a ring on the base 1. The circle where the plurality of sample hoppers 6 are located is coaxially arranged with the discharge opening 51 of the feed hopper 5. That is, the centers of the sample hoppers 6 are on a circle concentric with the 0-0 axis. Or, if the intersection point of the 0-0 axis and the base 1 is M, then the plurality of sample hoppers 6 are evenly arranged with M as the center. The distance between the sample hopper 6 and the center of the circle is much larger than the radius of the discharge opening 51.

[0056] Among the plurality of sample hoppers 6, there are at least one retained sample hopper 61 and more than two discarded sample hoppers 62. The samples in the retained sample hopper 61 are used for inspection, and the samples in the discarded sample hopper 62 are used to be discarded. In order to ensure that there are enough times of quartering, that is, the mass of the samples poured into the feed hopper 5 is large enough, so generally a retained sample hopper 61 and a plurality of discarded sample hoppers 62 will be configured. The retained sample hopper 61 and the discarded sample hopper 62 can use hoppers with the same shape and volume. Preferably, the plurality of discarded sample hoppers 62 are arranged adjacent to each other. If there are multiple retained sample hoppers 61, then the multiple retained sample hoppers 61 are also arranged adjacent to each other, avoiding the staggered arrangement of the plurality of discarded sample hoppers 62 and the retained sample hoppers 61. The feeding pipe 7 is a bent pipe or has a bending part. The upper end of the feeding pipe 7 is pivotally connected to the discharge opening 51, specifically through a bearing connection. The lower end of the feeding pipe 7 is used to feed materials to each sample hopper 6 below. When the feeding pipe 7 is driven by the variable-frequency motor 4 to rotate, the lower end of the feeding pipe 7 can pass above each sample hopper 6. The time when the lower end of the feeding pipe 7 passes above a sample hopper 6 is defined as the residence time. Since the feeding flow rate Q in the feeding pipe 7 remains unchanged during the feeding process, therefore, as long as the residence time of the lower end of the feeding pipe 7 above the retained sample hopper 61 is calculated, the mass of the samples loaded in the retained sample hopper 61 can be obtained.

[0057] The weight sensor 8 is provided at the top of the frame 1 and is used to weigh the total mass M of the samples added to the feed hopper 5 0, and transmit the quality signal to the control module 10. According to the sample mass M required for the experiment 1 to determine the sample mass M required in each retained sample hopper 61 1 / n 1 , n 1 , where n is the number of retained sample hoppers 61. Taking one retained sample hopper 61 as an example, the introduction is as follows:

[0058] The sample mass carried in all waste sample hoppers 62 is M 0 -M 1 . Then, the residence time t of the lower end of the feed pipe 7 above the retained sample hopper 61 1 = M 1 / Q. And the circumference L of one rotation of the lower end of the feed pipe 7 0 = 2πR, where R is the rotation radius of the lower end of the feed pipe 7. Then the arc length d that the lower end of the feed pipe 7 passes through each sample hopper 6 is d = L 0 / n, where n is the number of sample hoppers 6. From this, it can be deduced that the speed V of the lower end of the feed pipe 7 passing through the retained sample hopper 61 is V = dQ / M 1 . In this operation, the torque on the variable-frequency motor 4 can be regarded as constant. Therefore, the power of the variable-frequency motor 4 is proportional to the speed. According to the formula P = Fv, the current required motor power P 1 can be calculated to meet the speed and time when the lower end of the feed pipe 7 passes above the retained sample hopper 61. Of course, the transmission ratio of the transmission system between the variable-frequency motor 4 and the feed pipe 7 also needs to be considered in this process. The content of calculating the motor power according to the speed is a solution in the prior art and will not be elaborated here.

[0059] The control module 10 can adopt unit modules such as a computer, a controller, a processor, a chip, etc. that can realize automatic calculation.

[0060] The position monitoring block 20 is used to monitor whether the lower end of the feeding pipe 7 passes above the sample retaining hopper 61 and the rejected sample hopper 62. The position monitoring block 20 can be a monitor or a position sensor. In one solution, the position monitoring block 20 includes a transmitting end 201 and multiple receiving ends 202. The transmitting end 201 and the receiving ends 202 are respectively connected to the control module 10 through wires to achieve signal transmission. The transmitting end 201 is provided on the side wall of the lower end of the feeding pipe 7, specifically on the side wall of the following blanking pipe 72. One receiving end 202 is provided on each of the opposite sides of each sample hopper 6. The receiving end 202 is preferably provided outside the top opening of the sample hopper 6. The line connecting the two receiving ends 202 is on the rotation trajectory of the lower end of the feeding pipe 7. The receiving ends 202 on each sample retaining hopper 61 and each rejected sample hopper 62 are numbered respectively. When the lower end of the feeding pipe 7 rotates above the sample retaining hopper 61 or the rejected sample hopper 62, one receiving end 202 first receives the signal transmitted from the transmitting end 201 and transmits the signal to the control module 10, indicating that the lower end of the feeding pipe 7 has reached or is about to rotate above the sample retaining hopper 61 or the rejected sample hopper 62. Another receiving end 202 then receives the signal transmitted from the transmitting end 201 and transmits the signal to the control module 10, indicating that the lower end of the feeding pipe 7 has reached or is about to rotate away from above the sample retaining hopper 61 or the rejected sample hopper 62. In summary, for the material reduction equipment provided by the present invention, a frame 2 is provided on the base 1, the feeding hopper 5 is connected to the upper end of the frame 2, and multiple sample hoppers 6 are evenly distributed along the circumference on the base 1. The multiple sample hoppers 6 are concentrically arranged with the blanking port 51 of the feeding hopper 5. The upper end of the feeding pipe 7 is pivotally connected to the blanking port 51, and the feeding pipe 7 is driven by a variable frequency motor 4 to rotate, so as to feed each sample hopper 6 below. The sample hopper 6 is divided into at least a sample retaining hopper 61 and multiple rejected sample hoppers 62, and the samples in the sample retaining hopper 61 are used for inspection.

[0061] During feeding, the feeding flow rate in the feeding pipe 7 remains unchanged. Therefore, by presetting the retained sample mass in the sample retaining hopper 61 and weighing the total mass of the samples poured into the feeding hopper 5 by the weighing sensor 8, the control module 10 will automatically calculate the time required to stay at the retained sample mass, and thus correspondingly change the power of the variable frequency motor 4 to adjust the rotation speed of the lower end of the feeding pipe 7 above the sample retaining hopper 61, so that the mass of the samples contained in the sample retaining hopper 61 meets the requirements, without the need for secondary weighing, increasing or decreasing, improving the work efficiency.

[0062] In one embodiment, it is set that: the total mass of the samples poured into the feeding hopper is M 0 , and the blanking flow rate of the feeding pipe is Q;

[0063] The total mass of all the samples required in all the sample retaining hoppers is M 1 , and the number of the sample retaining hoppers is n 1, the number of the sample - discarding hoppers is n 2 , the rotation radius of the lower end of the feeding pipe is R;

[0064] The rotation speed of the lower end of the feeding pipe above each of the sample - retaining hoppers is V 1 , and the residence time is t 1 , the power corresponding to the frequency - conversion motor is P 1 ; the rotation speed of the lower end of the feeding pipe above each of the sample - discarding hoppers is V 2 , and the residence time is t 2 , the power corresponding to the frequency - conversion motor is P 2 ;

[0065] Then,

[0066] As long as P 1 、P 2 is within the rated power range of the frequency - conversion motor 4, the above - mentioned adjustment can be achieved.

[0067] In one embodiment, as Figures 1 - 2 shown, a support rod 22 is provided on one side of the weight sensor 8 at the top of the frame 2. When the weight sensor 8 is compressed to the limit state, the pressure plate 53 lands on the support rod 22 to prevent the weight sensor 8 from being damaged.

[0068] The weight sensor 8 is an existing device, and its working principle will not be elaborated here. When the weight sensor 8 is pressed down by the pressure plate 53, it will shrink downward.

[0069] The support rod 22 is provided at the top of the frame 2 and is inside the weight sensor 8. When the weight sensor 8 is in the initial state, the support rod 22 is lower than the top surface of the weight sensor 8. When the weight sensor 8 is pressed down to the limit shrinkage state, the support rod 22 is equal to or slightly higher than the top surface of the weight sensor 8, so as to support the pressure plate 53 and prevent the weight sensor 8 from being damaged.

[0070] In one embodiment, as Figure 1 and Figure 4 shown, a support plate 3 is provided in the frame 2.

[0071] The feeding pipe 7 includes a main pipe 71 extending vertically, an inclined pipe 72 connected to the lower end of the main pipe 71 and extending obliquely downward, and a feeding pipe 73 connected to the lower end of the inclined pipe 72 and extending towards the sample hopper 6.

[0072] The upper end of the main pipe 71 is pivotally connected to the feeding port 51, the main pipe 71 passes through the support plate 3 and is axially fixed to the support plate 3, and the main pipe 71 can rotate relative to the support plate 3.

[0073] The variable-frequency motor 4 is installed on the support plate 3, and the variable-frequency motor 4 is connected to the main pipe 71 through the transmission assembly 41. In this embodiment, a support plate 3 is provided in the frame 2 for supporting the variable-frequency motor 4, the feeding pipe 7, etc.

[0074] The feeding pipe 7 includes a main pipe 71, an inclined pipe 72, and a blanking pipe 73 that are connected in sequence. The main pipe 71 is vertically arranged, and the main pipe 71 is pivotally connected to the blanking port 51, and the main pipe 71 can rotate relative to the blanking port 51. The main pipe 71 and the blanking port 51 can be connected through a bearing. The main pipe 71 passes through the through hole 31 of the support plate 3, and the main pipe 71 and the support plate 3 are axially fixed through a bearing 32, and the main pipe 71 can rotate relative to the support plate 3.

[0075] The inclined pipe 72 is integrally connected to the lower end of the main pipe 71. The inclined pipe 72 is inclined toward one side of the main pipe 71 and extends obliquely downward. The slope of the inclined pipe 72 can be set as needed.

[0076] The blanking pipe 73 is integrally connected to the lower end of the inclined pipe 72, and the blanking pipe 73 extends downward. Thus, the blanking pipe 73 is offset to one side of the main pipe 71. The distance between the center of the blanking pipe 73 and the axis 0-0 of the blanking port 51 is D1, the distance between the inner edge of the sample hopper 6 and the axis 0-0 of the blanking port 51 is D2, and the distance between the outer edge of the sample hopper 6 and the axis 0-0 of the blanking port 51 is D3. Then, D3 > D1 > D2. Therefore, the blanking pipe 73 is located between the inner edge and the outer edge of the lower sample hopper 6, so that it can feed materials to the lower sample hopper 6.

[0077] The variable-frequency motor 4 is connected to the main pipe 71 through the transmission assembly 41. The variable-frequency motor 4 can drive the main pipe 71 to rotate, and then drive the inclined pipe 72 and the blanking pipe 73 to rotate around the 0-0 axis. When the feeding pipe 7 is driven to rotate by the variable-frequency motor 4, the eccentrically arranged blanking pipe 73 can pass over each sample hopper 6, so as to feed materials into each sample hopper 6.

[0078] In one of the embodiments, as Figure 4 shown, the transmission assembly 41 includes a first gear 411 provided on the rotating shaft of the variable-frequency motor 4 and a second gear 412 provided on the main pipe 71. The diameter of the first gear 411 is smaller than that of the second gear 412, and the first gear 411 meshes with the second gear 412.

[0079] In this embodiment, the gear transmission method is adopted, which can improve the transmission stability. The diameter of the first gear 411 is smaller than that of the second gear 412, which plays a role in deceleration.

[0080] In one of the embodiments, as Figure 3As shown, a blanking port 51 is connected with a connecting pipe 52 extending downward, and the connecting pipe 52 is inserted into a main pipe 71. A flange 711 for sealing the gap is provided at the upper port of the main pipe 71. A limiting ring 712 for stopping the lower end of the connecting pipe 52 is provided in the main pipe 71. A pipe wall groove 713 is formed on the inner surface of the main pipe 71 between the flange 711 and the limiting ring 712.

[0081] In this embodiment, an internal thread is provided on the inner surface of the blanking port 51, and an external thread is provided at the upper end of the connecting pipe 52. The upper end of the connecting pipe 52 is threadedly connected to the blanking port 51.

[0082] The lower end of the connecting pipe 52 is inserted into the main pipe 71. A flange 711 extending inward is provided in the upper port of the main pipe 71 for sealing the gap between it and the connecting pipe 52. A limiting ring 712 is also provided in the upper port of the main pipe 71 for stopping the lower end of the connecting pipe 52. A pipe wall groove 713 is formed on the inner surface of the main pipe 71, and the pipe wall groove 713 is formed between the flange 711 and the limiting ring 712 to reduce the contact surface with the connecting pipe 52 and reduce the friction between the two. As required, a bearing can be assembled in the pipe wall groove 713 to improve the rotation performance of the main pipe 71 relative to the connecting pipe 52.

[0083] In one of the embodiments, as Figure 1 and Figure 4 shown, the support plate 3 is slidably connected to the frame 2, and the support plate 3 can slide up and down relative to the frame 2.

[0084] An adjustment driving mechanism 9 for driving the support plate 3 to adjust up and down is provided between the frame 2 and the support plate 3.

[0085] In this embodiment, a variable-frequency motor 4 is installed on the support plate 3. A vertically extending slide rail is provided on the side of the frame 2. The end of the support plate 3 is connected to the slide rail of the frame 2. The support plate 3 can slide up and down relative to the frame 2, and then drive the feeding pipe 7 to adjust up and down, so as to adapt to the height of the sample hopper 6 below. In this embodiment, the distance between the flange 711 and the limiting ring 712 is the stroke that the support plate 3 can adjust up and down to keep the lower end of the connecting pipe 52 in the main pipe 71.

[0086] The adjustment driving mechanism 9 can adopt a piston driving mechanism, a motor lead screw driving mechanism, etc. The adjustment driving mechanism 9 is communicatively connected to the control module 10 and is controlled by the control module 10 to operate.

[0087] In one of the embodiments, as Figure 1 and Figure 4 shown, two sets of adjustment driving mechanisms 9 are connected between the frame 2 and the support plate 3, and the two sets of adjustment driving mechanisms 9 are located on opposite sides of the main pipe 71, improving the stability of the up and down adjustment of the support plate 3.

[0088] In one embodiment, as Figure 4 shown, the adjustment drive mechanism 9 includes an oil cylinder 91. The cylinder barrel 911 of the oil cylinder 91 is connected to the inner side of the frame 2 through a bracket 23, and the piston rod 912 of the oil cylinder 91 extends downward and is connected to the support plate 3. The structure of the oil cylinder 91 is reliable and has a long service life, which is suitable for use in the coal mine field.

[0089] In one embodiment, as Figure 1 and Figures 5 - 7 shown, positioning grooves 11 are formed in the base 1 at positions corresponding to each sample hopper 6, and the bottom of each sample hopper 6 is located in the positioning groove 11, which improves the stability of the sample hopper 6 arranged on the base 1.

[0090] In one embodiment, as Figure 5 shown, any two adjacent sample hoppers 6 are adjacent to each other, which can reduce the material from spilling onto the base 1.

[0091] In one embodiment, as Figure 1 and Figure 5 shown, an opening 21 is formed in the frame 2 at a position corresponding to the sample hopper 6 for taking and placing the sample hopper 6.

[0092] According to needs, the above technical solutions can be combined to achieve the best technical effect.

[0093] The above are only the principles and preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, based on the principles of the present invention, several other variations can also be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A material reduction device, characterized in that: The machine comprises a control module, a base, a frame arranged on the base, a feed hopper connected to the upper end of the frame, a plurality of sample hoppers uniformly distributed on the base along the circumferential direction, a feed pipe for feeding materials to each of the sample hoppers, a plurality of position monitoring blocks arranged around each of the sample hoppers and communicatively connected to the control module, a plurality of weight sensors arranged on the top of the frame and communicatively connected to the control module, and a variable frequency motor for driving the feed pipe to rotate; A horizontally extending pressing plate is provided on the outer periphery of the feed hopper, and the pressing plate falls on the weight sensor; The plurality of sample hoppers are arranged concentrically with the feed opening of the feed hopper, wherein the plurality of sample hoppers include at least one sample retaining hopper and more than two sample discarding hoppers; The upper end of the feeding tube is pivotally connected to the feeding port, and the lower end of the feeding tube extends toward the sample hopper; The control module can adjust the power of the variable frequency motor according to the preset sample quality to adjust the rotation speed of the feeding tube above the sample hopper and the sample discarding hopper so that the sample quality contained in the sample hopper meets the requirements.

2. The material reduction equipment according to claim 1, characterized in that: The total mass of the sample poured into the feed hopper is M0, and the material flow rate of the feed pipe is Q; The total mass of the samples required in all the sample hoppers is M1, the number of the sample hoppers is n1, the number of the discarded sample hoppers is n2, and the rotation radius of the lower end of the feeding tube is R; The rotation speed of the lower end of the feeding tube above each sample retaining hopper is V1, the residence time is t1, and the power corresponding to the variable frequency motor is P1; the rotation speed of the lower end of the feeding tube above each sample discarding hopper is V2, the residence time is t2, and the power corresponding to the variable frequency motor is P2; but, 3. The material reduction equipment according to claim 1, characterized in that: A support rod is provided on the top of the frame at one side of the weight sensor; When the weight sensor is compressed to a limit state, the pressure plate falls on the support rod.

4. The material reduction equipment according to claim 1, characterized in that: A support plate is provided in the frame; The feeding pipe includes a main pipe extending vertically, an inclined pipe connected to the lower end of the main pipe and extending obliquely downward, and a feeding pipe connected to the lower end of the inclined pipe and extending toward the sample hopper; The upper end of the main pipe is pivotally connected to the discharge port, the main pipe passes through the support plate and is axially fixed to the support plate, and the main pipe can rotate relative to the support plate; The variable frequency motor is mounted on the support plate, and the variable frequency motor is connected to the main pipe via a transmission assembly.

5. The material reduction equipment according to claim 4, characterized in that: The transmission assembly includes a first gear disposed on the rotating shaft of the variable frequency motor and a second gear disposed on the main pipe, the wheel diameter of the first gear is smaller than the wheel diameter of the second gear, and the first gear is meshed with the second gear.

6. The material reduction equipment according to claim 1, characterized in that: The feed opening is connected to a connecting pipe extending downward, and the connecting pipe is inserted into the main pipe; The upper port of the main pipe is provided with a flange for sealing the gap; The main pipe is provided with a stop ring for stopping the lower end of the connecting pipe; A pipe wall groove is formed on the inner surface of the main pipe between the flange and the limiting ring.

7. The material reduction equipment according to claim 4, characterized in that: The support plate is slidably connected to the frame, and the support plate can slide up and down relative to the frame; An adjustment driving mechanism for driving the support plate to adjust up and down is provided between the frame and the support plate.

8. The material reduction equipment according to claim 6, characterized in that: Two sets of the adjusting drive mechanisms are connected between the frame and the supporting plate, and the two sets of the adjusting drive mechanisms are located at opposite sides of the main pipe.

9. The material reduction equipment according to claim 1, characterized in that: A positioning groove is provided on the base corresponding to the position of each sample hopper, and the bottom of each sample hopper is located in the positioning groove.

10. The material reduction equipment according to claim 1, characterized in that: Any two adjacent sample hoppers are adjacent to each other.

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