Raw material crushing and grinding equipment and method for biscuit production

Abstract

The invention relates to the technical field of food processing machinery, and discloses raw material crushing and grinding equipment and method for biscuit production. The raw material crushing and grinding equipment for biscuit production comprises an equipment main body, a crushing mechanism, a blockage cleaning mechanism and a controller, a crushing chamber is arranged in the equipment main body, and a discharge hopper is arranged below the crushing chamber; the crushing mechanism is arranged in the crushing chamber and comprises a rotor rotationally mounted in the crushing chamber, a plurality of groups of hammers mounted on the rotor, a screen surrounding the periphery of the rotor and a rotary driving assembly. According to the blockage cleaning mechanism, accurate positioning and targeted cleaning of a screen blockage area can be achieved, the pressure difference value change of each static pressure cavity is captured in real time through a pressure difference monitoring unit, and a controller can rapidly lock the blockage area and drive a telescopic scraper assembly at the corresponding position to stretch out for scraping and sweeping within a specific angle range; after cleaning is completed, the scraper is immediately shrunk and reset, and abrasion between the scraper and the screen is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of food processing machinery technology, and more specifically, to a raw material crushing and grinding equipment and method for biscuit production. Background Technology

[0002] In the biscuit production process, high-oil-content nuts such as walnuts and almonds typically need to be ground into powder. Currently, hammer mills are a commonly used raw material grinding and pulverizing equipment. However, existing grinding equipment has a common problem in practical application: after high-oil-content raw materials are ground, the oil and fine powder easily form sludge, which adheres to the sieve holes of the semi-circular screen, causing screen blockage. If the screen blockage is severe, it will lead to a sharp decrease in sieving efficiency, uneven product particle size, and a significant reduction in production capacity. In existing technologies, there are two main traditional solutions to the problem of screen clogging. One is manual cleaning after machine shutdown, which not only severely impacts production continuity but also involves high labor intensity. The other is to install an integrated scraping cleaning mechanism around the filter screen, using a driven scraper to remove blockages from the screen surface. While this method effectively solves the clogging problem, during the scraping cleaning process, the scraper and screen have extensive contact throughout, resulting in significant ineffective contact in areas where the screen is not clogged, thus causing faster wear on both the scraper and the screen. Summary of the Invention

[0003] The purpose of this invention is to provide a raw material crushing and grinding equipment and method for biscuit production, in order to solve the above-mentioned technical problems.

[0004] The present invention solves the above-mentioned technical problems through the following technical solutions: In a first aspect, the present invention provides a raw material crushing and grinding equipment for biscuit production, comprising: a main body of the equipment, a crushing mechanism, a blockage clearing mechanism, and a controller; The main body of the equipment is equipped with a crushing chamber, and a discharge hopper is located below the crushing chamber; The crushing mechanism is located in the crushing chamber and includes a rotor rotatably mounted in the crushing chamber, multiple sets of hammers mounted on the rotor, a screen surrounding the rotor, and a rotation drive assembly. The blockage clearing mechanism includes a differential pressure monitoring unit and a clearing unit; The differential pressure monitoring unit includes a static pressure chamber located on the outside of the screen. The static pressure chamber contains multiple independent static pressure cavities that are evenly distributed along the rotor axis. Each static pressure cavity is sealed and connected to the corresponding outer area of ​​the screen. Each static pressure cavity is equipped with a micro differential pressure sensor. The cleaning unit includes multiple telescopic scraper assemblies integrated and mounted on the rotor along the axial direction. The axial position of each telescopic scraper assembly corresponds to a static pressure chamber, and each telescopic scraper assembly has a first working position retracted away from the inner wall of the screen and a second working position extended to contact the corresponding inner wall of the screen. The controller is electrically connected to both the micro differential pressure sensor and the telescopic scraper assembly, and is configured as follows: Obtain the real-time pressure difference value of each static pressure chamber; Based on the comparison between the real-time differential pressure value and the preset benchmark differential pressure value, determine whether there is a blocked zone and lock the blocked zone number; Obtain the real-time rotation angle of the rotor; When the telescopic scraper assembly corresponding to the blockage zone number rotates with the rotor to enter the screen area, the telescopic scraper assembly is controlled to extend from the first working position to the second working position to scrape and clear the blockage of the screen zone. When the telescopic scraper assembly rotates with the rotor to leave the screen area, the telescopic scraper assembly is controlled to retract from the second working position back to the first working position.

[0005] Preferably, the telescopic scraper assembly includes a sealing guide seat fixed on the rotor, a scraper body slidably disposed on the sealing guide seat, and a telescopic drive component installed in the sealing guide seat; the telescopic drive component is used to drive the scraper body to extend from the first working position to the second working position.

[0006] Preferably, the telescopic drive includes an electromagnetic drive device and a return spring sleeved on the scraper body. The return spring is used to drive the scraper body to return from the second working position to the first working position after the electromagnetic drive device is de-energized.

[0007] Preferably, the preload of the reset spring is greater than 1.5 times the centrifugal force experienced by the scraper body at the highest rotor speed.

[0008] Preferably, the end of the scraper body is provided with an arc-shaped cutting edge that matches the screen, and the arc-shaped cutting edge is provided with a comb-like structure corresponding to the screen hole position.

[0009] Preferably, the static pressure chamber is divided into multiple independent static pressure chambers by multiple axial partitions, and each static pressure chamber has a discharge port at the bottom that gradually narrows from top to bottom, and the discharge port is connected to the discharge hopper below.

[0010] Preferably, the controller includes an absolute encoder mounted on the rotor, which is used to acquire the real-time rotation angle of the rotor and transmit it to the controller.

[0011] Preferably, the controller is further configured to: The blockage level is determined based on the comparison between the real-time differential pressure value and the preset baseline differential pressure value. When the real-time differential pressure value exceeds the first preset threshold, the corresponding telescopic scraper is controlled to perform the first scraping action; When the real-time differential pressure value exceeds the first preset threshold but is lower than the second preset threshold, the corresponding telescopic scraper is controlled to perform more than the first scraping action, and the rotary drive component is controlled to reduce the feeding speed.

[0012] Secondly, the present invention also provides a method for clearing and controlling blockages in the raw material grinding and pulverizing equipment for biscuit production, comprising the following steps: S1. Real-time monitoring: The real-time differential pressure value Pi of each static pressure chamber is obtained through the differential pressure monitoring unit, and the real-time rotation angle of the rotor is obtained through the encoder. S2. Blockage Judgment: Compare the real-time pressure difference value Pi of each static pressure chamber with the preset reference pressure difference value P0. If any Pi ≥ P0 × K, where K is a blockage judgment coefficient greater than 1, then the static pressure chamber is determined to be blocked, and the blockage zone number is locked. S3. Targeted positioning: Match the telescopic scraper corresponding to the axial position of the static pressure chamber according to the locked blockage zone number; S4. Angle Interlock and Unblocking Execution: Based on the real-time rotation angle of the rotor, when the telescopic scraper corresponding to the blocked zone rotates with the rotor to the point where it is about to enter the screen area, the telescopic scraper is controlled to extend from the first working position to the second working position, so that it contacts the inner wall of the blocked screen zone and scrapes it; when the telescopic scraper rotates with the rotor to leave the screen area, the telescopic scraper is controlled to retract from the second working position back to the first working position. S5. Effect evaluation and reset: After the unblocking action is completed, the real-time differential pressure value Pi of the static pressure chamber is obtained again. If Pi returns to the normal range, the unblocking is completed. If Pi is still higher than the blockage judgment threshold, step S4 is repeated until the unblocking is successful or the preset alarm condition is triggered.

[0013] Preferably, the blockage determination coefficient K in step S2 includes a first coefficient K1 and a second coefficient K2, and K2>K1>1; in step S4, when Pi≥P0×K2, the corresponding telescopic scraper is controlled to perform multiple scraping operations, and a deceleration signal is synchronously output to the rotary drive component to reduce the feeding speed.

[0014] The beneficial effects of this invention are as follows: The blockage-clearing mechanism of this invention can accurately locate and target the blockage area of ​​the screen, effectively avoiding the large-area ineffective contact between the scraper and the screen in traditional integral scraping blockage-clearing mechanisms. By capturing the pressure difference value changes of each static pressure chamber in real time through the differential pressure monitoring unit, the controller can quickly lock the blockage zone and drive the telescopic scraper assembly at the corresponding position to extend and scrape within a specific angle range. After cleaning, it immediately retracts and resets, greatly reducing the wear of the scraper and the screen and extending the service life of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a raw material crushing and grinding equipment for biscuit production according to the present invention; Figure 2 This is a top view of a raw material crushing and grinding device for biscuit production according to the present invention; Figure 3 This is the present invention. Figure 2 Cross-sectional view of plane AA; Figure 4 This is the present invention. Figure 3 A magnified view of a portion of point a; Figure 5 This is the present invention. Figure 2 Cross-sectional view of the BB plane.

[0016] In the diagram: 10. Main body of the equipment; 101. Crushing chamber; 102. Discharge hopper; 20. Crushing mechanism; 201. Rotor; 202. Hammer blades; 203. Rotary drive assembly; 30. Blockage removal mechanism; 301. Static pressure chamber; 302. Static pressure cavity; 303. Micro differential pressure sensor; 304. Sealing guide seat; 305. Scraper body; 306. Electromagnetic drive device; 307. Return spring. Detailed Implementation

[0017] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0018] Please refer to the following: Figures 1 to 5 A raw material crushing and grinding equipment for biscuit production mainly includes a main body 10, a crushing mechanism 20, a blockage clearing mechanism 30, and a controller.

[0019] The main body of the equipment 10 is equipped with a crushing chamber 101. A feed inlet is provided above the crushing chamber 101, and a discharge hopper 102 is provided below the crushing chamber 101 for collecting the crushed material.

[0020] The crushing mechanism 20 is disposed within the crushing chamber 101, and includes a rotor 201 rotatably mounted within the crushing chamber 101, multiple sets of hammers 202 mounted on the rotor 201, a semi-circular screen surrounding the rotor 201, and a rotary drive assembly 203. The rotary drive assembly 203 is connected to the rotor 201 for transmission and is used to drive the rotor 201 to rotate at high speed, so that the multiple sets of hammers 202 can crush the material, and the qualified fine powder of the crushed raw material can be directly discharged through the screen into the discharge hopper 102.

[0021] The clogging removal mechanism 30 is mainly used for the automatic and precise removal of clogging materials from the screen to prevent clogging. Specifically, the main clogging removal mechanism 30 includes a differential pressure monitoring unit and a cleaning unit.

[0022] The differential pressure monitoring unit includes a static pressure chamber 301 located outside the screen. The static pressure chamber 301 is internally divided into multiple independent static pressure cavities 302, evenly distributed along the axial direction of the rotor 201, by multiple axial partitions. In this embodiment, a number of static pressure cavities 302 are correspondingly provided, each covering multiple rows of screen holes. The top of each static pressure cavity 302 is sealed and connected to the corresponding outer area of ​​the screen, ensuring that there is no cross-contamination between the cavities.

[0023] Each static pressure chamber 302 is equipped with a micro differential pressure sensor 303. One pressure detection port of the micro differential pressure sensor 303 is connected to the static pressure chamber 302, and the other pressure detection port is connected to the inside of the crushing chamber 101 through a pipeline. The micro differential pressure sensor 303 can capture the minute pressure difference changes caused by screen blockage in real time.

[0024] In addition, each static pressure chamber 302 has a discharge port at the bottom that gradually narrows from top to bottom. This discharge port is connected to the discharge hopper 102 below. The discharge port has two functions: first, it allows a small amount of fine powder that passes through the screen and enters the static pressure chamber 302 to be discharged, preventing material accumulation; second, it uses the damping effect of the small aperture on the airflow to form a pneumatic low-pass filter, effectively isolating the pressure fluctuations on the side of the discharge hopper 102, ensuring that the air pressure in the static pressure chamber 302 is relatively stable, thereby ensuring the measurement accuracy of the micro differential pressure sensor 303.

[0025] The cleaning unit includes multiple telescopic scraper assemblies integrated and mounted on the rotor 201 along the axial direction; the number of telescopic scraper assemblies is the same as the number of static pressure chambers 302, both being one, and the axial position of each telescopic scraper assembly corresponds one-to-one with a static pressure chamber 302.

[0026] Each telescopic scraper assembly includes a sealing guide seat 304, a scraper body 305, an electromagnetic drive device 306, and a return spring 307. Specifically, the sealing guide seat 304 is fixed to the rotor 201. The scraper body 305 is slidably disposed on the sealing guide seat 304, and its top end is provided with an arc-shaped cutting edge that matches the curvature of the screen. The arc-shaped cutting edge is provided with a comb-like structure corresponding to the screen hole position, and the comb teeth are aligned with the screen hole, and the gap between the teeth is aligned with the ribs of the screen, ensuring that the scraping only acts on the blocked screen hole and avoids ineffective friction with the screen ribs.

[0027] The electromagnetic drive device 306 is installed inside the sealed guide seat 304, and generally adopts a DC sealed push-pull electromagnet. The electromagnetic drive device 306 is electrically connected to the controller and is used to drive the scraper body 305 to extend outward.

[0028] A return spring 307 is sleeved on the scraper body 305 and is used to drive the scraper body 305 to retract and reset inward after the electromagnetic drive device 306 is de-energized. The preload of the return spring 307 must be at least 1.5 times greater than the centrifugal force experienced by the scraper body 305 at the highest speed of the rotor 201, to ensure that the scraper body 305 will not be accidentally thrown out due to centrifugal force under any operating condition.

[0029] In actual use, the telescopic scraper assembly has two stable working positions. In the first working position, the electromagnetic drive device 306 is de-energized, and the scraper body 305 retracts to a position away from the inner wall of the screen under the action of the return spring 307. At this time, the top of the scraper body 305 is 2-3mm lower than the top of the hammer 202, completely within the rotation radius of the rotor 201, and does not affect the normal crushing operation. In the second working position, the electromagnetic drive device 306 is energized, and the scraper body 305 extends outward against the elastic force of the return spring 307, with its top contacting the inner wall of the screen. The contact interference is 0.2-0.5mm to ensure effective removal of blockages.

[0030] The controller, typically an industrial PLC (Programmable Logic Controller), includes an absolute encoder located at the non-drive end of rotor 201 to acquire the real-time rotation angle of rotor 201 and transmit it to the controller. The controller can employ a contactless wireless power supply and signal transmission module.

[0031] The controller is electrically connected to the differential pressure sensor 303, the electromagnetic drive device 306, the rotary drive assembly 203, and the absolute encoder, and is configured to execute the following logic: a. Core Congestion Clearing Logic Normal monitoring: The equipment is running normally, all telescopic scraper components are in the first working position (retracted state), the micro differential pressure sensor 303 collects the differential pressure value Pi of each static pressure chamber 302 in real time, and the absolute value encoder uploads the rotor angle θ in real time.

[0032] Blockage detection: The controller compares the real-time differential pressure value Pi of each static pressure chamber 302 with the preset reference differential pressure value P0 (the differential pressure value under no-load or normal operating conditions). If any Pi ≥ P0 × K (K is a blockage detection coefficient greater than 1, for example, K = 1.2), it is determined that the screen section corresponding to that static pressure chamber 302 is blocked, and the blocked section number is locked.

[0033] Targeted positioning: Based on the locked blockage partition number, the controller matches the telescopic scraper assembly corresponding to the axial position of the static pressure chamber 302 (for example, if static pressure chamber 302 is blocked, then the telescopic scraper assembly 3 is matched).

[0034] Angle Interlocking and Unblocking Execution: Based on the rotor 201 angle θ fed back by the absolute encoder, the controller tracks the position of the telescopic scraper assembly in real time. When it is predicted that the telescopic scraper assembly is about to enter the screen coverage area with the rotor 201, the controller immediately sends a power-on command to the electromagnetic drive device 306 of the telescopic scraper assembly. The electromagnetic drive device 306 actuates instantaneously, driving the scraper body 305 to extend from the first working position to the second working position. As the rotor 201 rotates, the extended scraper body 305 performs targeted scraping of the inner wall of the screen in the designated area. When the telescopic scraper assembly leaves the screen area, the controller immediately cuts off the power, and the scraper body 305 quickly retracts back to the first working position under the action of the return spring 307.

[0035] Effectiveness Evaluation: After the unblocking action is completed, the controller reads the differential pressure value Pi of the static pressure chamber 302 again. If Pi returns to the normal range (e.g., less than P0×1.1), the unblocking is complete. If Pi is still higher than the blockage determination threshold, the above scraping action is repeated until the unblocking is successful or an alarm is triggered.

[0036] b. Tiered congestion clearing logic To address varying degrees of congestion, the controller is also configured with a tiered congestion clearing strategy: Slight blockage: When Pi≥P0×1.2 (first preset threshold), it is judged as a slight blockage. The corresponding telescopic scraper assembly is controlled to perform 1-3 scraping actions without linking the feeding system.

[0037] Severe clogging: When Pi≥P0×1.5 (second preset threshold), it is determined to be severe clogging. The corresponding telescopic scraper assembly is controlled to perform 3-5 scraping actions, and a deceleration signal is simultaneously output to the rotary drive assembly 203 to reduce the feeding speed by 20%-30% to alleviate the degree of clogging and improve the success rate of clearing clogging.

[0038] Multi-zone blockage: When two or more zones reach the blockage threshold at the same time, the telescopic scraper components of the corresponding zones are controlled to move synchronously to clear the blockage in sequence.

[0039] Example 2 In addition, as another embodiment of the present invention, a method for clearing blockages in the above-mentioned raw material crushing and grinding equipment is also provided, the specific steps of which are as follows: S1. Real-time monitoring: The real-time differential pressure value Pi of each static pressure chamber 302 is obtained through the differential pressure monitoring unit, and the real-time rotation angle of the rotor 201 is obtained through the absolute value encoder.

[0040] S2. Blockage judgment: Compare the real-time pressure difference value Pi of each static pressure chamber 302 with the preset reference pressure difference value P0; if any Pi ≥ P0 × K (K is the blockage judgment coefficient, K = 1.2 in this embodiment), then the static pressure chamber 302 is determined to be blocked, and the blockage zone number is locked.

[0041] S3. Targeted positioning: Based on the locked blockage partition number, match the telescopic scraper assembly corresponding to the axial position of the static pressure chamber 302.

[0042] S4. Angle Interlock and Unblocking Execution: Based on the real-time rotation angle of rotor 2011, when the telescopic scraper assembly corresponding to the blocked zone rotates with rotor 201 to the point where it is about to enter the screen area, the telescopic scraper assembly is controlled to extend from the first working position to the second working position, so that it contacts the inner wall of the blocked screen zone and scrapes it; when the telescopic scraper assembly rotates with rotor 201 to leave the screen area, the telescopic scraper assembly is controlled to retract from the second working position back to the first working position.

[0043] S5. Effect evaluation and reset: After the unblocking action is completed, the real-time differential pressure value Pi of the static pressure chamber 302 is obtained again; if Pi recovers to a range less than P0×K, the unblocking is completed; if Pi is still higher than the blockage judgment threshold, step S4 is repeated until the unblocking is successful or the preset alarm condition is triggered (e.g., it does not recover after 5 consecutive scrapings).

[0044] As a further optimization of this method, the blockage determination coefficient K in step S2 may include a first coefficient K1=1.2 and a second coefficient K2=1.5; in step S4, when Pi ≥ P0 × K2, the corresponding telescopic scraper is controlled to perform multiple scraping operations (such as 3-5 times), and a deceleration signal is simultaneously output to the rotary drive component 203 to reduce the feeding speed.

[0045] This invention, through the aforementioned equipment and method, enables precise positioning and targeted cleaning of screen blockage areas, effectively avoiding the large-area ineffective contact between the scraper and the screen in traditional integral scraping-type unblocking mechanisms. By capturing real-time pressure difference changes in each static pressure chamber 302 through a differential pressure monitoring unit, the controller can quickly lock onto the blockage zone and drive the corresponding telescopic scraper assembly to extend and scrape within a specific angle range. After cleaning, the scraper immediately retracts and resets, greatly reducing wear between the scraper and the screen and extending the equipment's service life. Simultaneously, the graded unblocking logic automatically adjusts the number of scraping operations and the feeding speed according to the degree of blockage, further improving production continuity and stability while ensuring unblocking effectiveness and reducing production efficiency losses caused by frequent shutdowns for cleaning. Furthermore, the equipment's overall structure is compact, and the components work together precisely and efficiently, providing reliable technical support for the crushing and grinding process of biscuit raw materials.

[0046] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A raw material crushing and grinding equipment for biscuit production, characterized in that, include: The main body of the equipment consists of a crushing mechanism, a blockage clearing mechanism, and a controller. The main body of the equipment is equipped with a crushing chamber, and a discharge hopper is located below the crushing chamber; The crushing mechanism is located in the crushing chamber and includes a rotor rotatably mounted in the crushing chamber, multiple sets of hammers mounted on the rotor, a screen surrounding the rotor, and a rotation drive assembly. The blockage clearing mechanism includes a differential pressure monitoring unit and a clearing unit; The differential pressure monitoring unit includes a static pressure chamber located on the outside of the screen. The static pressure chamber contains multiple independent static pressure cavities that are evenly distributed along the rotor axis. Each static pressure cavity is sealed and connected to the corresponding outer area of ​​the screen. Each static pressure cavity is equipped with a micro differential pressure sensor. The cleaning unit includes multiple telescopic scraper assemblies integrated and mounted on the rotor along the axial direction. The axial position of each telescopic scraper assembly corresponds to a static pressure chamber, and each telescopic scraper assembly has a first working position retracted away from the inner wall of the screen and a second working position extended to contact the corresponding inner wall of the screen. The controller is electrically connected to both the micro differential pressure sensor and the telescopic scraper assembly, and is configured as follows: Obtain the real-time pressure difference value of each static pressure chamber; Based on the comparison between the real-time differential pressure value and the preset benchmark differential pressure value, determine whether there is a blocked zone and lock the blocked zone number; Obtain the real-time rotation angle of the rotor; When the telescopic scraper assembly corresponding to the blockage zone number rotates with the rotor to enter the screen area, the telescopic scraper assembly is controlled to extend from the first working position to the second working position to scrape and clear the blockage of the screen zone. When the telescopic scraper assembly rotates with the rotor to leave the screen area, the telescopic scraper assembly is controlled to retract from the second working position back to the first working position.

2. The raw material crushing and grinding equipment for biscuit production according to claim 1, characterized in that, The telescopic scraper assembly includes a sealing guide seat fixed on the rotor, a scraper body slidably disposed on the sealing guide seat, and a telescopic drive component installed in the sealing guide seat; the telescopic drive component is used to drive the scraper body to extend from the first working position to the second working position.

3. The raw material crushing and grinding equipment for biscuit production according to claim 2, characterized in that, The telescopic drive includes an electromagnetic drive device and a reset spring sleeved on the scraper body. The reset spring is used to drive the scraper body to reset from the second working position to the first working position after the electromagnetic drive device is de-energized.

4. The raw material crushing and grinding equipment for biscuit production according to claim 3, characterized in that, The preload of the reset spring is greater than 1.5 times the centrifugal force experienced by the scraper body at the highest rotor speed.

5. The raw material crushing and grinding equipment for biscuit production according to claim 2, characterized in that, The scraper body has an arc-shaped cutting edge at its end that matches the screen, and the arc-shaped cutting edge has a comb-like structure corresponding to the screen hole position.

6. The raw material crushing and grinding equipment for biscuit production according to claim 1, characterized in that, The static pressure chamber is divided into multiple independent static pressure chambers by multiple axial partitions. Each static pressure chamber has a discharge port at the bottom that gradually narrows from top to bottom, and the discharge port is connected to the discharge hopper below.

7. The raw material crushing and grinding equipment for biscuit production according to claim 1, characterized in that, The controller includes an absolute encoder mounted on the rotor, which is used to acquire the real-time rotation angle of the rotor and transmit it to the controller.

8. The raw material crushing and grinding equipment for biscuit production according to claim 1, characterized in that, The controller is also configured to: The blockage level is determined based on the comparison between the real-time differential pressure value and the preset baseline differential pressure value. When the real-time differential pressure value exceeds the first preset threshold, the corresponding telescopic scraper is controlled to perform the first scraping action; When the real-time differential pressure value exceeds the second preset threshold which is higher than the first preset threshold, the corresponding telescopic scraper is controlled to perform more scraping actions than the first time, and the rotary drive component is controlled to reduce the feeding speed.

9. A method for clearing blockages in a raw material grinding and pulverizing equipment for biscuit production as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Real-time monitoring: The real-time differential pressure value Pi of each static pressure chamber is obtained through the differential pressure monitoring unit, and the real-time rotation angle of the rotor is obtained through the encoder. S2. Blockage Judgment: Compare the real-time pressure difference value Pi of each static pressure chamber with the preset reference pressure difference value P0. If any Pi ≥ P0 × K, where K is a blockage judgment coefficient greater than 1, then the static pressure chamber is determined to be blocked, and the blockage zone number is locked. S3. Targeted positioning: Match the telescopic scraper corresponding to the axial position of the static pressure chamber according to the locked blockage zone number; S4. Angle Interlock and Unblocking Execution: Based on the real-time rotation angle of the rotor, when the telescopic scraper corresponding to the blocked zone rotates with the rotor to the point where it is about to enter the screen area, the telescopic scraper is controlled to extend from the first working position to the second working position, so that it contacts the inner wall of the blocked screen zone and scrapes it; when the telescopic scraper rotates with the rotor to leave the screen area, the telescopic scraper is controlled to retract from the second working position back to the first working position. S5. Effect evaluation and reset: After the unblocking action is completed, the real-time differential pressure value Pi of the static pressure chamber is obtained again. If Pi returns to the normal range, the unblocking is completed. If Pi is still higher than the blockage judgment threshold, step S4 is repeated until the unblocking is successful or the preset alarm condition is triggered.

10. The method for clearing blockages in the raw material crushing and grinding equipment for biscuit production according to claim 9, characterized in that, The blockage determination coefficient K in step S2 includes a first coefficient K1 and a second coefficient K2, and K2>K1>1; In step S4, when Pi≥P0×K2, the corresponding telescopic scraper is controlled to perform multiple scraping operations, and a deceleration signal is simultaneously output to the rotary drive component to reduce the feeding speed.

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