A dual-rotor hammer crusher and crushing method for barite crushing

Abstract

This invention discloses a dual-rotor hammer crusher and crushing method for barite crushing, relating to the field of stone crushing. The proposed solution includes: a main shell with a feed hopper fixed at the top and a gravity baffle hinged at the bottom; the main shell contains a first crushing chamber and a second crushing chamber that are interconnected, and both the first and second crushing chambers are rotatably connected to crushing hammers for crushing materials; a reversing guide plate rotatably connected to the main shell; and an electric actuator fixed to the main shell, with its output end hinged to the reversing guide plate. By rotatably connecting the reversing guide plate within the main shell and driving it to rotate via the electric actuator, the feed hopper can be switched to communicate with either the first or second crushing chamber, changing the initial feeding of stone into either chamber. Simultaneously, changing the rotation direction of the second motor alters the impact surface of the crushing hammers, ensuring crushing efficiency.

Description

Technical Field

[0001] This invention relates to the field of stone crushing, and in particular to a dual-rotor hammer crusher and crushing method for barite crushing. Background Technology

[0002] In the mining and mineral processing industry, barite plays an important role due to its wide range of applications in drilling, radiation protection, and the manufacture of heavy concrete. The process of extracting and processing barite from ore involves multiple steps, among which crushing and jigging are key steps.

[0003] Currently, hammer crushers are generally used for crushing barite. Hammer crushers are divided into single-rotor crushers and double-rotor crushers. Compared with single-rotor crushers, double-rotor crushers produce more uniform crushed particles.

[0004] For example, the patent with authorization announcement number CN209829122U discloses a dual-rotor single-stage hammer crusher, which includes a frame, and the frame supports two oppositely arranged rotors and a number of staggered turntables arranged on the two rotors. Each turntable is evenly provided with a number of hammers.

[0005] It uses a turntable to drive the hammers to rotate and crush the stone. However, current dual-rotor crushers have some problems. In current dual-rotor crushers, the stone first enters one crushing chamber and is crushed by contact with the first turntable, and then enters another crushing chamber and is crushed by contact with the second turntable. The movement trajectory of the stone is relatively fixed, and the hammers only hit the stone on one side. After long-term operation, the hammers will cause slow crushing due to wear and other reasons. When used for barite crushing, there is a lot of dust from the barite crushing. Long-term crushing will cause the filter plate to become clogged. Both of these situations will affect the crushing efficiency. If the hammering surface of the hammers is not replaced in time or the filter plate is not repaired, it may even cause damage to the entire equipment. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide a dual-rotor hammer crusher and crushing method for barite crushing, so as to realize self-inspection of the crushing state during crushing and facilitate the replacement of the hammer impact surface of the crusher hammer.

[0007] To achieve the above-mentioned technical objectives, the present invention provides a dual-rotor hammer crusher for barite crushing:

[0008] include:

[0009] The main shell has a feed hopper fixed at the top for quantitative feeding and a gravity baffle hinged at the bottom. The main shell has a first crushing chamber and a second crushing chamber that are interconnected. Both the first crushing chamber and the second crushing chamber are rotatably connected to a crushing hammer for crushing materials.

[0010] The guide plate is rotatably connected to the main housing and is used to switch the connection between the feed hopper and the first crushing chamber or the second crushing chamber.

[0011] An electric actuator is fixed to the main housing, and the output end of the electric actuator is hinged to the switching guide plate for driving the switching guide plate to rotate.

[0012] The first data acquisition module is used to obtain the duration of two consecutive openings of the gravity baffle;

[0013] The second data acquisition module is used to acquire the sound frequencies in the first and second crushing chambers.

[0014] The breakage state recognition module takes the duration value and sound frequency as input to the trained breakage state recognition model and outputs the breakage state category.

[0015] The analysis module determines whether to generate a conversion instruction based on the type of breakage.

[0016] The control module controls the extension and retraction of the electric actuator based on conversion commands.

[0017] Preferably, a partition plate and a filter plate are fixed inside the main housing, which divide the main housing into a first crushing chamber and a second crushing chamber, and the bottom of the filter plate is uniformly provided with screen holes;

[0018] The outer periphery of the reversing guide plate abuts against the inner wall of the main housing and the outer surface of the partition plate, respectively.

[0019] Preferably, a second motor is fixed to the outer surface of the main housing, and the output end of the second motor is fixedly connected to the breaker hammer;

[0020] A guide plate is fixed inside the feeding hopper, a receiving wheel is rotatably connected inside the main housing, and a first motor is fixed on the outer surface of the feeding hopper. The output end of the first motor is fixedly connected to the receiving wheel.

[0021] Preferably, a first guide plate and a second guide plate are rotatably connected inside the main housing, and the first guide plate and the second guide plate are respectively located on both sides of the partition plate.

[0022] Preferably, the guide plate is coaxially fixedly connected to a first cam, the output end of the electric actuator is hinged to a connecting rod, the end of the connecting rod away from the electric actuator is hinged to a lever, the outer surface of the lever is rotatably connected to a connecting post, and the connecting post is fixed to the main housing, one end of the lever is slidably connected to the first cam, and the other end of the lever is slidably connected to a synchronizing rod.

[0023] Preferably, the two ends of the synchronizing rod are respectively hinged to a third cam and a second cam, and the second cam and the third cam are respectively coaxially fixedly connected to the first guide plate and the second guide plate.

[0024] A crushing method for barite crushing, based on the aforementioned dual-rotor hammer crusher for barite crushing, includes the following steps: acquiring crushing characteristic data, including duration values ​​and sound frequencies; inputting the crushing characteristic data into a trained crushing state recognition model and outputting a crushing state category; determining whether to generate a conversion command based on the crushing state category; controlling the extension and retraction of an electric push rod to adjust the rotation of a guide plate based on the conversion command, thereby changing the material input into the first crushing chamber or the second crushing chamber; and controlling a second motor to change its rotation direction based on the conversion command.

[0025] Preferably, the training method for the broken state recognition model is as follows:

[0026] Multiple sets of historical fracture feature data were obtained under experimental conditions. Each set of historical fracture feature data was assigned a corresponding actual label based on the fracture state category at the time of collection: label 1 for normal fracture, label 2 for blocked fracture, and label 3 for slow fracture. Each set of historical fracture feature data was used as input to a machine learning model. The machine learning model outputs the predicted label for each set of historical fracture feature data, uses the actual label as the prediction target, and minimizes the sum of prediction accuracies for all historical fracture feature data as its training objective. The machine learning model was trained until the sum of prediction accuracies converged. Training was then stopped, and the trained machine learning model was used as the fracture state recognition model. The machine learning model was either a Naive Bayes model or a Support Vector Machine model.

[0027] Preferably, the method for determining whether to generate a conversion instruction based on the type of breakage includes:

[0028] If the crushing state category is normal crushing, no conversion command is generated; if the crushing state category is blocked crushing, no conversion command is generated, and a shutdown maintenance command is generated; if the crushing state category is slow crushing, a conversion command is generated.

[0029] Preferably, the method for obtaining the duration of two consecutive openings of the gravity baffle includes:

[0030] The rotation angle value of the gravity baffle is collected and compared with the preset rotation angle threshold. If the rotation angle value is less than the preset rotation angle threshold, the gravity baffle is determined to be in a closed state. If the rotation angle value is greater than or equal to the preset rotation angle threshold, the gravity baffle is determined to be in an open state. n time values ​​are collected for n open states, where n is an integer greater than or equal to 2. The absolute value of the difference between two adjacent time values ​​is taken as the duration value.

[0031] As can be seen from the above technical solutions, this application has the following beneficial effects:

[0032] 1: By rotating a guide plate inside the main housing and driving the guide plate to rotate via an electric actuator, the connection between the feed hopper and the first or second crushing chamber can be switched, changing whether the stone is fed into the first or second crushing chamber first. At the same time, by changing the rotation direction of the second motor, the hammering surface of the breaker can be changed, thus ensuring crushing efficiency.

[0033] 2: By obtaining the opening duration of two consecutive gravity baffles, the length of time it takes for material to fall onto the gravity baffle can be determined, thereby analyzing whether there is slow crushing or filter plate blockage. Combined with the analysis of sound frequencies in the first and second crushing chambers, the particle size range of stone that has been crushed for a long time in the first or second crushing chamber can be determined, and then it can be determined whether the slow crushing is due to wear of the hammer surface or the filter plate blockage affecting the material falling, so as to deal with different situations in a timely manner. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0035] Figure 1 This invention provides an overall structural schematic diagram of a dual-rotor hammer crusher for barite crushing.

[0036] Figure 2 This is a rear view structural schematic diagram of a dual-rotor hammer crusher for barite crushing provided by the present invention.

[0037] Figure 3 This is a cross-sectional structural schematic diagram of a dual-rotor hammer crusher for barite crushing provided by the present invention.

[0038] Figure 4 A schematic diagram of the switching position structure of the guide plate of a dual-rotor hammer crusher for barite crushing provided by the present invention.

[0039] Figure 5 A schematic diagram of the gravity baffle in the open state of a dual-rotor hammer crusher for barite crushing provided by the present invention.

[0040] Figure 6 A schematic diagram of the overall structure of the switching guide plate and electric push rod of a dual-rotor hammer crusher for barite crushing provided by the present invention.

[0041] Figure 7 The flowchart of the analysis module provided by this invention.

[0042] Figure descriptions: 1. Main housing; 11. Feed hopper; 111. Guide plate; 112. Receiving wheel; 113. First motor; 12. Gravity baffle; 101. First crushing chamber; 102. Second crushing chamber; 2. Divider plate; 3. Filter plate; 4. Crusher; 5. Diverting guide plate; 51. First cam; 52. First guide plate; 521. Second cam; 53. Second guide plate; 531. Third cam; 6. Electric actuator; 61. Connecting rod; 62. Pulley; 621. Connecting pile; 63. Synchronizing rod; 7. Second motor. Detailed Implementation

[0043] The following description is exemplary in nature and is not intended to limit the scope, application, or use of this disclosure. It should be understood that in all these figures, the same or similar reference numerals indicate the same or similar parts and features. The figures are merely schematic representations of the concept and principles of embodiments of this disclosure and do not necessarily show the specific dimensions and scale of the various embodiments of this disclosure. Certain details or structures of embodiments of this disclosure may be exaggerated in particular portions of certain figures.

[0044] Example 1

[0045] See Figure 1 , Figure 3 and Figure 5 As shown in this embodiment, a dual-rotor hammer crusher for barite crushing includes a main housing 1, a gravity baffle 12, a filter plate 3, a crushing hammer 4, and a second motor 7. The crushing hammer 4 includes a rotor and hammer blocks fixed on the rotor. The rotor is rotatably connected inside the main housing 1. The second motor 7 is fixedly connected to the main housing 1, and the output end of the second motor 7 is fixedly connected to the rotor to drive the rotor to rotate, i.e., the crushing hammer 4 rotates. The filter plate 3 is fixed inside the main housing 1 and located below the crushing hammer 4. The bottom of the filter plate 3 is evenly provided with screen holes for filtering stone. After the stone is crushed by the impact of the crushing hammer 4, the qualified stone particles filtered out by the filter plate 3 fall onto the gravity baffle 12. Unqualified stone continues to be crushed. The gravity baffle 12 is hinged to the bottom of the main housing 1. When the stone loaded on the gravity baffle 12 reaches the set weight, the gravity baffle 12 automatically opens, and the stone can be discharged from the bottom of the main housing 1.

[0046] For example, in this embodiment, the gravity baffle 12 can be opened and closed by electromagnetic control or by elastic force control. In the electromagnetic control method, the end of the gravity baffle 12 is fixed by an electromagnet, and a pressure sensor is installed on the gravity baffle 12 to obtain the pressure on it. When the pressure value reaches a pressure threshold set by those skilled in the art, the electromagnet is energized and de-energized, causing the gravity baffle 12 to open. In the elastic control method, a torsion spring is installed at the hinge point between the gravity baffle 12 and the main housing 1. When the material carried on the gravity baffle 12 is greater than the elastic force applied to the gravity baffle 12 by the torsion spring, the gravity baffle 12 can open. The purpose is to avoid the bottom of the main housing 1 always being open, preventing crushing dust from constantly escaping from the bottom of the main housing 1, and to determine the crushing efficiency based on the opening and closing frequency of the gravity baffle 12. For example, when setting the same gravity parameters for opening and closing, a fast opening and closing frequency indicates high crushing efficiency, while a slow opening and closing frequency indicates low crushing efficiency.

[0047] For further details, please refer to [link / reference]. Figure 2 , Figure 3 and Figure 5 As shown, a feeding hopper 11 is fixed to the top of the main housing 1 for quantitative feeding. The feeding hopper 11 is vertically connected and communicates with the inner cavity of the main housing 1. A guide plate 111 is fixed inside the feeding hopper 11, and a receiving wheel 112 is provided on the side of the guide plate 111. The receiving wheel 112 is located inside the main housing 1 and is rotatably connected to the main housing 1. A material trough is evenly opened on the surface of the receiving wheel 112. After adding stone from the top of the feeding hopper 11, the stone falls from the guide plate 111 into the material trough. As the receiving wheel 112 rotates, the stone can be poured into the main housing 1. A first motor 113 is fixed to the outer surface of the feeding hopper 11. The output end of the first motor 113 is fixedly connected to the receiving wheel 112 for driving the receiving wheel 112 to rotate. By controlling the rotation speed of the first motor 113, the quantitative feeding frequency can be controlled.

[0048] By quantitative feeding, the accuracy of evaluating the crushing efficiency and crushing state of the dual rotor hammer crusher in this embodiment can be further improved. For example, if the amount of stone added to the main housing 1 is the same within a certain period of time, and if the crushing hammer 4 crushes normally and the filter plate 3 has no clogging problem, then the amount of stone that falls onto the gravity baffle 12 and is crushed is within the normal range. In this case, the crushing efficiency and crushing state of the dual rotor hammer crusher are normal. Otherwise, the crushing efficiency and crushing state of the dual rotor hammer crusher are abnormal.

[0049] Furthermore, see Figure 3As shown, a partition plate 2 is fixed inside the main housing 1. The partition plate 2 and the filter plate 3 divide the main housing 1 into a first crushing chamber 101 and a second crushing chamber 102 that are interconnected. A crushing hammer 4 is provided in both the first crushing chamber 101 and the second crushing chamber 102.

[0050] For details, please refer to Figure 3 and Figure 4 As shown, a switching guide plate 5 is rotatably connected inside the main housing 1, and an electric push rod 6 is fixed on the outer surface of the main housing 1. The output end of the electric push rod 6 is hinged to the switching guide plate 5 and is used to drive the switching guide plate 5 to rotate. The outer periphery of the switching guide plate 5 abuts against the inner wall of the main housing 1 and the outer surface of the partition plate 2 respectively. By rotating the switching guide plate 5, the feed hopper 11 is switched to communicate with the first crushing chamber 101 or the second crushing chamber 102.

[0051] For example, such as Figure 3 As shown, the stone enters from the feed hopper 11 and falls into the first crushing chamber 101. While the crushing hammer 4 in the first crushing chamber 101 rotates clockwise to impact and crush the stone, some of the stone will enter the second crushing chamber 102 from the connection between the first crushing chamber 101 and the second crushing chamber 102 due to inertia. The crushing hammer 4 in the second crushing chamber 102 rotates clockwise to catch the stone and continue to impact and crush it. At this time, the hammering surface of the crushing hammer 4 is surface A.

[0052] If a decrease in crushing efficiency is detected, it indicates severe wear on surface A of the breaker 4. In this case, the working surface of the breaker 4 needs to be replaced, i.e., replaced with surface B. This is achieved by flipping the breaker using the guide plate 5 and switching the rotation direction using the second motor 7. Figure 4 As shown, the stone enters from the feed hopper 11 and falls into the second crushing chamber 102. While the crusher 4 in the second crushing chamber 102 rotates counterclockwise to impact and crush the stone, some of the stone will enter the first crushing chamber 101 from the connection between the second crushing chamber 102 and the first crushing chamber 101. The crusher 4 in the first crushing chamber 101 rotates counterclockwise to catch the stone and continue to impact and crush it. At this time, the hammering surface of the crusher 4 is surface B.

[0053] For further details, please refer to [link / reference]. Figure 3 and Figure 4 As shown, a first guide plate 52 and a second guide plate 53 are rotatably connected inside the main housing 1. The first guide plate 52 and the second guide plate 53 are located on both sides of the partition plate 2, respectively. The first guide plate 52 and the second guide plate 53 are located between the partition plate 2 and the filter plate 3, and play a role in guiding the stone drop point. The first guide plate 52 and the second guide plate 53 can be rotated simultaneously with the reversing guide plate 5.

[0054] For details, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, a first cam 51 is coaxially fixedly connected to the reversing guide plate 5. A connecting rod 61 is hinged to the output end of the electric push rod 6. A lever 62 is hinged to the end of the connecting rod 61 away from the electric push rod 6. A connecting post 621 is rotatably connected to the outer surface of the lever 62, and the connecting post 621 is fixed to the main housing 1. Both ends of the lever 62 have oval holes. One end of the lever 62 is slidably connected to the first cam 51 through the oval hole, and the other end of the lever 62 is slidably connected to a synchronizing rod 63 through the oval hole. The two ends of the synchronizing rod 63 are respectively hinged to a third cam 531 and a second cam. Wheel 521, and the second cam 521 and the third cam 531 are coaxially fixedly connected to the first guide plate 52 and the second guide plate 53 respectively. By pushing and pulling the connecting rod 61 through the electric push rod 6, the connecting rod 61 can drive the lever 62 to rotate on the connecting post 621. The connecting post 621 can drive the first cam 51 to rotate and the synchronizing rod 63 to slide respectively. When the first cam 51 rotates, it can drive the reversing guide plate 5 to flip. When the synchronizing rod 63 slides, it can drive the first guide plate 52 and the second guide plate 53 to flip respectively through the third cam 531 and the second cam 521.

[0055] The purpose is to quickly and simultaneously switch the rotation of the guide plate 5, the first guide plate 52, and the second guide plate 53 to change the feeding direction into the first crushing chamber 101 or the second crushing chamber 102.

[0056] Example 2

[0057] See Figure 3 and Figure 7 As shown, based on the above embodiments, the improvement of this embodiment is that the dual rotor hammer crusher further includes a first data acquisition module, a second data acquisition module, a crushing state identification module, an analysis module, and a control module, and the modules are connected to each other by wired and / or wireless means.

[0058] The first data acquisition module is used to acquire the duration of two consecutive openings of the gravity baffle 12; the second data acquisition module is used to acquire the sound frequencies in the first crushing chamber 101 and the second crushing chamber 102; the crushing state recognition module inputs the duration and sound frequencies into the trained crushing state recognition model and outputs the crushing state category; the analysis module determines whether to generate a conversion command based on the crushing state category; the control module controls the extension and retraction of the electric push rod 6 and controls the second motor 7 to switch the rotation direction based on the conversion command.

[0059] By analyzing the duration and sound frequency, the crushing state of the dual rotor hammer crusher can be determined. If the duration increases significantly, it indicates that the crushing efficiency has slowed down. Since the duration is based on the opening time of two adjacent openings of the gravity baffle 12, and the opening time of the gravity baffle 12 depends on the amount and frequency of material falling from the first crushing chamber 101 and the second crushing chamber 102 onto the gravity baffle 12, if the duration increases significantly, two problems can be identified. First, the filter plate 3 is severely clogged, which affects normal filtration. At this time, the crushing state of the breaker hammer 4 is normal, so the proportion of small-sized stones accumulated in the first crushing chamber 101 and the second crushing chamber 102 is large.

[0060] Secondly, if the filter plate 3 is not severely clogged, that is, it does not affect normal filtration, then the crushing state of the breaker 4 is abnormal, and the hammer surface is severely worn. In this case, the proportion of large-sized stones accumulated in the first crushing chamber 101 and the second crushing chamber 102 is large.

[0061] The sound frequencies collected in the two cases are significantly different. Using these as feature data to train the broken state recognition model, the accuracy of the output broken state category is high.

[0062] Specifically, the training method for the broken state recognition model is as follows:

[0063] Multiple sets of historical fragmentation characteristic data were obtained under experimental conditions. The fragmentation characteristic data included duration values ​​and sound frequencies.

[0064] Each set of historical fracture feature data is labeled according to the fracture state category at the time of collection. The label is 1 for normal fracture, 2 for blocked fracture, and 3 for slow fracture. Each set of historical fracture feature data is used as input to a machine learning model, which outputs the predicted label for each set, uses the actual label as the prediction target, and aims to minimize the sum of the prediction accuracies of all historical fracture feature data. The prediction accuracy is calculated using the formula: zk = (ak - wk). 2 Where k is the number of the historical breakage feature data, zk is the prediction accuracy, ak is the predicted label value corresponding to the k-th group of historical breakage feature data, and wk is the actual label corresponding to the k-th group of historical breakage feature data; the machine learning model is trained until the sum of the prediction accuracies converges, then training is stopped and the trained machine learning model is used as the breakage state recognition model. The machine learning model is either a Naive Bayes model or a support vector machine model.

[0065] For further details, please refer to [link / reference]. Figure 5 As shown, the method for obtaining the duration of two consecutive openings of the gravity baffle 12 includes:

[0066] The rotation angle value of gravity baffle 12 is collected and compared with a preset rotation angle threshold. The preset rotation angle threshold is the angle value collected when gravity baffle 12 is open, which is used as the preset rotation angle value. (See reference...) Figure 5 As shown;

[0067] If the rotation angle value is less than the preset rotation angle value threshold, the gravity baffle 12 is determined to be in a closed state; if the rotation angle value is greater than or equal to the preset rotation angle value threshold, the gravity baffle 12 is determined to be in an open state.

[0068] Collect n time values ​​for n times when the device is in the on state, where n is an integer greater than or equal to 2. Take the absolute value of the difference between two adjacent time values ​​as the duration value. The purpose is to update the duration value in real time.

[0069] It should be noted that the second data acquisition module in this embodiment is a device capable of acquiring audio changes, such as a microphone or an audio analyzer, and is not limited here. The second data acquisition module can be fixed on the surface of the main housing 1 or the surface of the filter plate 3 (not shown) and is used to acquire the sound frequencies in the first crushing chamber 101 and the second crushing chamber 102. Taking a microphone as an example, the microphone acquires the original sound signal, converts it into a digital signal through a data acquisition card, and transmits it through a cable to the data processing system. The data processing system performs a series of processing and analysis on the received audio signal, such as spectrum analysis and peak analysis, and extracts parameters such as frequency and amplitude suitable for analysis in this embodiment. The first data acquisition module can be a sensor capable of acquiring shaft rotation changes, such as an encoder or a gyroscope. The first data acquisition module can be mounted on the hinge shaft between the gravity baffle 12 and the main housing 1. Taking an encoder as an example, the encoder is used to measure the position and speed changes of an object, including the rotation angle.

[0070] Example 3

[0071] Based on the above embodiments, this embodiment describes a crushing method for barite crushing, the crushing method comprising:

[0072] Acquire fragmentation characteristic data, which includes duration and sound frequency;

[0073] Input the fracture feature data into the trained fracture state recognition model and output the fracture state category;

[0074] Whether to generate a conversion instruction is determined based on the type of breakage status;

[0075] Based on the conversion command, the electric push rod 6 is controlled to extend and retract, and the guide plate 5 is flipped to change the material input into the first crushing chamber 101 or the second crushing chamber 102.

[0076] The second motor 7 is controlled to change its rotation direction based on the conversion command.

[0077] The crushing method described in this embodiment allows for self-inspection of the dual-rotor hammer crusher. When the crushing state is abnormal, the working face of the breaker hammer 4 can be changed to ensure the crushing efficiency of the dual-rotor hammer crusher.

[0078] Furthermore, methods for determining whether to generate a conversion instruction based on the type of breakage state include:

[0079] If the breakage status category is normal breakage, no conversion instruction will be generated;

[0080] If the crushing state category is blockage crushing, no conversion command will be generated, but a shutdown maintenance command will be generated. Based on the shutdown maintenance command, the staff can clean or replace the filter plate 3.

[0081] If the crushing state category is slow crushing, a conversion instruction will be generated.

[0082] The exemplary implementation of the solution proposed in this disclosure has been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, which is determined by the appended claims.

Claims

1. A dual-rotor hammer crusher for barite crushing, characterized in that, include: The main housing (1) has a feed hopper (11) fixed at the top for quantitative feeding and a gravity baffle (12) hinged at the bottom. The main housing (1) has a first crushing chamber (101) and a second crushing chamber (102) that are interconnected inside. Both the first crushing chamber (101) and the second crushing chamber (102) are rotatably connected with a crushing hammer (4) for crushing materials. The guide plate (5) is rotatably connected to the main housing (1) and is used to switch the feed hopper (11) to communicate with the first crushing chamber (101) or the second crushing chamber (102); An electric actuator (6) is fixed on the main housing (1), and the output end of the electric actuator (6) is hinged to the switching guide plate (5) to drive the switching guide plate (5) to flip. The first data acquisition module is used to obtain the duration of two consecutive openings of the gravity baffle (12); The second data acquisition module is used to acquire the sound frequencies in the first crushing chamber (101) and the second crushing chamber (102); The breakage state recognition module takes the duration value and sound frequency as input to the trained breakage state recognition model and outputs the breakage state category. The analysis module determines whether to generate a conversion instruction based on the type of breakage. The control module controls the extension and retraction of the electric actuator (6) based on the conversion command.

2. A dual-rotor hammer crusher for barite crushing according to claim 1, characterized in that, The main housing (1) is fixed with a partition plate (2) and a filter plate (3). The partition plate (2) and the filter plate (3) divide the main housing (1) into a first crushing chamber (101) and a second crushing chamber (102). The bottom of the filter plate (3) is uniformly provided with sieve holes. The outer periphery of the guide plate (5) abuts against the inner wall of the main housing (1) and the outer surface of the partition plate (2), respectively.

3. A dual-rotor hammer crusher for barite crushing according to claim 1, characterized in that, The outer surface of the main housing (1) is fixed with a second motor (7), and the output end of the second motor (7) is fixedly connected to the breaker hammer (4); The feed hopper (11) is fixed with a guide plate (111) inside, and the main housing (1) is rotatably connected with a receiving wheel (112). The outer surface of the feed hopper (11) is fixed with a first motor (113), and the output end of the first motor (113) is fixedly connected to the receiving wheel (112).

4. A dual-rotor hammer crusher for barite crushing according to claim 1, characterized in that, The main housing (1) is rotatably connected to a first guide plate (52) and a second guide plate (53), which are located on both sides of the partition plate (2).

5. A dual-rotor hammer crusher for barite crushing according to claim 4, characterized in that, The guide plate (5) is coaxially fixedly connected to the first cam (51). The output end of the electric push rod (6) is hinged to the connecting rod (61). The end of the connecting rod (61) away from the electric push rod (6) is hinged to the lever (62). The outer surface of the lever (62) is rotatably connected to the connecting post (621), and the connecting post (621) is fixed on the main housing (1). One end of the lever (62) is slidably connected to the first cam (51), and the other end of the lever (62) is slidably connected to the synchronizing rod (63).

6. A dual-rotor hammer crusher for barite crushing according to claim 5, characterized in that, The two ends of the synchronizing rod (63) are respectively hinged to a third cam (531) and a second cam (521), and the second cam (521) and the third cam (531) are respectively coaxially fixedly connected to the first guide plate (52) and the second guide plate (53).

7. A crushing method for barite crushing, implemented based on a dual-rotor hammer crusher for barite crushing as described in any one of claims 1-6, characterized in that, The crushing method includes: Acquire fragmentation characteristic data, which includes duration and sound frequency; Input the fracture feature data into the trained fracture state recognition model and output the fracture state category; Whether to generate a conversion instruction is determined based on the type of breakage status; Based on the conversion command, the electric push rod (6) is controlled to extend and retract to adjust the reversing guide plate (5) to flip, changing the material input into the first crushing chamber (101) or the second crushing chamber (102); The second motor (7) is controlled by the conversion command to change the rotation direction.

8. A crushing method for barite crushing according to claim 7, characterized in that, The training method for the fracture state recognition model is as follows: Multiple sets of historical fracture feature data are pre-collected. For each set of historical fracture feature data, a corresponding actual label is generated based on the fracture state category at the time of collection. When the fracture state category is normal fracture, the actual label is 1; when the fracture state category is blocked fracture, the actual label is 2; and when the fracture state category is slow fracture, the actual label is 3. Each set of historical fracture feature data is used as input to a machine learning model. The machine learning model outputs the predicted label for each set of historical fracture feature data, uses the actual label as the prediction target, and aims to minimize the sum of the prediction accuracies of all historical fracture feature data as its training objective. The machine learning model is trained until the sum of prediction accuracies converges. Training is then stopped, and the trained machine learning model is used as the fracture state recognition model. The machine learning model is either a Naive Bayes model or a Support Vector Machine model.

9. A crushing method for barite crushing according to claim 8, characterized in that, Methods for determining whether to generate a conversion command based on the type of breakage state include: If the breakage status category is normal breakage, no conversion instruction will be generated; If the breakage condition is classified as blockage breakage, no conversion instruction will be generated; instead, a shutdown and maintenance instruction will be generated. If the crushing state category is slow crushing, a conversion instruction will be generated.

10. A crushing method for barite crushing according to claim 7, characterized in that, The methods for obtaining the duration of two consecutive openings of the gravity baffle (12) include: Collect the rotation angle value of the gravity baffle (12) and compare the rotation angle value with the preset rotation angle value threshold; If the rotation angle value is less than the preset rotation angle value threshold, it is determined that the gravity baffle (12) is in a closed state; If the rotation angle value is greater than or equal to the preset rotation angle value threshold, then the gravity baffle (12) is determined to be in the open state; Collect n time values ​​for n times when the device is in the on state, where n is an integer greater than or equal to 2, and take the absolute value of the difference between two adjacent time values ​​as the duration value.

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