A crushing device for concrete production and a control method

Abstract

The application discloses a kind of crushing device and control method for concrete production, crushing device includes crushing component, for crushing concrete;Driving assembly, including driving motor and speed reducer structure, driving motor has two gears of low speed block and high speed block, and speed reducer structure has three gears of positive rotation gear, reverse rotation gear, neutral gear;Guide plate has first position and second position;Distance measuring structure is used to send distance early warning signal to control component;Temperature measuring structure is used to send temperature early warning signal to control component;Contact structure is used to send contact early warning signal to control component;Control component controls the action of speed reducer structure according to distance early warning signal, control component controls the action of driving motor according to temperature early warning signal, and control component controls the action of guide plate according to contact early warning signal.The crushing device and control method for concrete production according to the application can effectively reduce the failure of equipment, thereby prolonging the service life of equipment.

Description

Technical Field

[0001] This invention relates to the field of crushing equipment technology, and in particular to a crushing device and control method for concrete production. Background Technology

[0002] Construction waste is generated during construction projects. In order to reuse construction waste and prevent it from polluting the environment, crushing equipment is usually used to crush and recycle it. However, because construction waste comes in various shapes and materials and has different sizes, current crushing equipment is prone to malfunction or damage, which seriously reduces its service life. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a crushing device for concrete production, which can effectively reduce the failure rate and extend the service life of the crushing device.

[0004] The present invention also proposes a control method for the above-mentioned crushing device.

[0005] A concrete crushing apparatus according to a first aspect of the present invention includes:

[0006] The base frame is provided with a first mounting hole, a second mounting hole, and a backing plate;

[0007] The crushing assembly includes a first crushing roller and a second crushing roller that cooperate with each other. The first crushing roller is rotatably mounted in the first mounting hole about its own axis, and the second crushing roller is rotatably mounted in the second mounting hole about its own axis. The second crushing roller can slide along the length direction of the second mounting hole.

[0008] An elastic structure is installed on the base frame, with its two ends abutting against the second crushing roller and the abutment plate, respectively.

[0009] A collection chamber, located below the crushing component, includes a first chamber body and a second chamber body;

[0010] A guide plate is disposed between the crushing component and the collection chamber for guiding the crushed concrete blocks; the guide plate has a first position for guiding the crushed concrete blocks into the first chamber and a second position for guiding the crushed concrete blocks into the second chamber.

[0011] The drive assembly includes a drive motor and a reducer structure. The drive motor is connected to the crushing assembly via the reducer structure. The drive motor has a low-speed gear and a high-speed gear, and the reducer structure has three gears: forward gear, reverse gear, and neutral gear.

[0012] The control component is used to control the drive motor to switch between low speed and high speed, to control the reducer structure to switch between forward, reverse and neutral, and to control the guide plate to switch between the first position and the second position.

[0013] According to some embodiments of the present invention, the base frame is equipped with a contact structure, which is disposed on the sliding path of the second crushing roller;

[0014] Within a unit of time, the second crushing roller makes regular contact with the contact structure and reaches a set number of times, and the contact structure sends a distance warning signal to the control component.

[0015] According to some embodiments of the present invention, after the contact structure contacts the second crushing roller and reaches a set delay time, the contact structure sends a contact warning signal to the control component.

[0016] According to some embodiments of the present invention, the base frame is provided with a first stop and a second stop arranged at intervals, the contact structure is slidably installed between the first stop and the second stop, and a first spring is provided between the contact structure and the second stop;

[0017] The sliding direction of the contact structure is parallel to the length direction of the second mounting hole.

[0018] According to some embodiments of the present invention, the contact structure includes a second spring, a contact piece, and a contact button, wherein the contact button is connected to the contact piece via the second spring;

[0019] When the second crushing roller slides along the length of the second mounting hole until it abuts against the contact button and continues to slide, the second crushing roller pushes the contact button to connect with the contact piece.

[0020] Within a unit of time, when the contact button and the contact piece are connected and the set number of times are reached, the contact structure sends a distance warning signal to the control component;

[0021] After the contact button and the contact piece are connected and the set delay time is reached, the contact structure sends a contact warning signal to the control component.

[0022] According to some embodiments of the present invention, the contact structure further includes a delay switch, which is connected to the contact piece and is used to set the delay duration.

[0023] According to some embodiments of the present invention, the drive motor is provided with a temperature measuring structure, which is used to detect the housing temperature of the drive motor;

[0024] The temperature measuring structure is preset with a warning temperature. If the temperature of the drive motor housing exceeds the warning temperature, the temperature measuring structure sends a temperature warning signal to the control component.

[0025] According to some embodiments of the present invention, the reducer structure has a first gear and a second gear, the first gear being drivenly connected to the first crushing roller, and the second gear being drivenly connected to the second crushing roller through a transmission component;

[0026] The drive assembly further includes a tensioning structure that abuts against the transmission member and is used to tension the transmission member.

[0027] According to a second aspect of the present invention, the control method is applicable to the above-described crushing device, and the control method comprises:

[0028] The control component executes a control strategy based on the distance warning signal, and the control strategy controls the reducer structure to switch between forward gear, reverse gear, and neutral gear.

[0029] The control component controls the drive motor to switch from high speed to low speed based on the temperature warning signal;

[0030] The control component controls the guide plate to switch from the first position to the second position based on the contact warning signal.

[0031] According to some embodiments of the present invention, the control strategy is as follows:

[0032] The reducer structure switches from forward gear to reverse gear and operates for a first set time.

[0033] If the reducer switches to forward gear and operates for a second set time, and the control component receives the distance warning signal within the second set time, the reducer switches to neutral gear and the control component issues an audible and visual alarm.

[0034] The concrete crushing device and control method according to embodiments of the present invention have at least the following beneficial effects:

[0035] The temperature measurement structure sends a temperature warning signal, and the contact structure sends a distance warning signal and a contact warning signal to the control component. The control component adopts different control methods according to different warning signals, which can effectively reduce equipment failures and extend the service life of the equipment.

[0036] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0038] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0039] Figure 2 for Figure 2 Enlarged view of point A in the middle;

[0040] Figure 3 for Figure 2 A schematic diagram of the contact structure in the middle;

[0041] Figure 4 This is a schematic diagram showing the connection between the crushing component and the driving component in an embodiment of the present invention.

[0042] Icon labels:

[0043] Base frame 100, first mounting hole 110, second mounting hole 120, abutment plate 130, ranging structure 131, first stop block 140, second stop block 150, first spring 151, pressure measuring structure 160;

[0044] Crushing assembly 200, first crushing roller 210, first central shaft 211, second crushing roller 220, second central shaft 221, abutment sleeve 222;

[0045] Reducer structure 300, transmission component 310, tensioning structure 320, tensioning wheel 321, and clamping spring 322;

[0046] 400 elastic structure;

[0047] Collection chamber 500, first chamber 510, second chamber 520, guide plate 530;

[0048] Contact structure 600, contact button 610, button cover 611, extension rod 612, contact piece 620, second spring 630, time delay switch 640, housing 650. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0050] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0051] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0052] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0053] Reference Figures 1 to 4 An embodiment of the present invention provides a concrete crushing device for concrete production, comprising a base frame 100, a crushing component 200, a drive component, and a collection chamber 500. The crushing component 200 is installed on the base frame 100, and the collection chamber 500 is disposed below the crushing component 200. The crushing component 200 is used to crush and recycle construction waste, the drive component is used to drive the crushing component 200 to operate, and the collection chamber 500 is used to collect the construction waste after it has been crushed by the crushing component 200.

[0054] Reference Figure 1As shown, the base frame 100 in this embodiment is provided with a first mounting hole 110, a second mounting hole 120, and a backing plate 130. The first mounting hole 110 is a cylindrical hole, and the second mounting hole 120 is a strip-shaped hole, located between the first mounting hole 110 and the backing plate 130. The crushing assembly 200 includes a first crushing roller 210 and a second crushing roller 220 that cooperate with each other. The first crushing roller 210 is rotatably mounted in the first mounting hole 110 about its own axis, and the second crushing roller 220 is rotatably mounted in the second mounting hole 120 about its own axis. The second crushing roller 220 can slide along the length direction of the second mounting hole 120. Specifically, the outer peripheral surface of the first crushing roller 210 is provided with a first crushing structure protruding from its surface, and the outer peripheral surface of the second crushing roller 220 is provided with a second crushing structure protruding from its surface. The first crushing structure and the second crushing structure cooperate with each other to achieve the crushing of construction waste. Two first mounting holes 110 are provided, and the two first mounting holes 110 are arranged opposite each other; similarly, two second mounting holes 120 are provided, and the two second mounting holes 120 are arranged opposite each other; the first crushing roller 210 has a first central shaft 211, and the second crushing roller 220 has a second central shaft 221. The two ends of the length direction of the first central shaft 211 are respectively rotatably inserted through the two first mounting holes 110 around their own axis, and the two ends of the length direction of the second central shaft 221 are respectively rotatably inserted through the two second mounting holes 120 around their own axis; since the second central shaft 221 can slide along the second mounting hole 120, the second crushing roller 220 can move closer to or further away from the first crushing roller 210. When the second crushing roller 220 slides away from the first crushing roller 210, the crushed construction waste particles will increase in size.

[0055] In an embodiment of the present invention, a collection chamber 500 is disposed below the crushing component 200 and includes a first chamber 510 and a second chamber 520. The first chamber 510 is used to collect smaller particles after crushing, and the second chamber 520 is used to collect larger particles after crushing. The second chamber 520 is connected to a conveying device, which can re-convey the particles in the second chamber 520 to the top of the crushing component 200 for secondary crushing. To facilitate the guidance of the crushed particles, the crushing device in this embodiment also includes a guide plate 530, which is disposed between the crushing component 200 and the collection chamber 500 for guiding the crushed concrete blocks. The guide plate 530 has a first position for guiding the crushed concrete blocks to the first chamber 510 and a second position for guiding the crushed concrete blocks to the second chamber 520. The guide plate 530 switches between the first position and the second position to guide the particles to different chambers. Figure 1 The middle guide plate 530 is in the second position.

[0056] In an embodiment of the present invention, the crushing device further includes an elastic structure 400, which is mounted on the base frame 100. Both ends of the elastic structure 400 abut against the second crushing roller 220 and the abutment plate 130, respectively. Specifically, an abutment sleeve 222 is sleeved at the end of the second central shaft 221 of the second crushing roller 220, and both ends of the elastic structure 400 abut against the abutment sleeve 222 and the abutment plate 130, respectively. The elastic structure 400 is preferably a spring. The elastic structure 400 applies a force to the second crushing roller 220, causing it to slide towards the first crushing roller 210. This allows the crushing device in this embodiment to not only crush construction waste but also prevent damage to the first crushing roller 210 or the second crushing roller 220 caused by hard steel bars or other structures mixed in the construction waste, thus extending the service life of the first crushing roller 210 and the second crushing roller 220.

[0057] In embodiments of the present invention, the crushing device further includes a drive assembly and a control assembly. The drive assembly includes a drive motor and a reducer structure 300. The drive motor is connected to the crushing assembly 200 via the reducer structure 300. The drive motor has a low-speed gear and a high-speed gear, and the reducer structure 300 has three gears: forward gear, reverse gear, and neutral gear. The control assembly is used to control the drive motor to switch between the low-speed gear and the high-speed gear, and to control the reducer structure 300 to switch between the forward gear, the reverse gear, and the neutral gear. The control assembly can also be used to control the guide plate 530 to switch between the first position and the second position. The control assembly is preferably electrically connected to the drive motor, the reducer structure 300, and the guide plate 530, but wireless connection or other methods can also be used. Various methods are provided in the prior art for controlling the motor speed; any one of the existing technologies can be used depending on the actual situation, and will not be elaborated here. The reducer structure 300 includes multiple gears, and many similar technical solutions are disclosed in the prior art. The specific solution of the reducer structure 300 in this embodiment can adopt the solution of the prior art, and will not be limited further here.

[0058] In an embodiment of the present invention, the drive motor is equipped with a temperature measuring structure for detecting the casing temperature of the drive motor. The temperature measuring structure has a preset warning temperature. If the casing temperature of the drive motor exceeds the warning temperature, the temperature measuring structure sends a temperature warning signal to the control component. The warning temperature can be set according to actual conditions. If the load on the drive motor is large, it will cause the temperature of the drive motor to rise. Measuring the casing temperature of the drive motor is mainly to prevent the drive motor from being overloaded.

[0059] In an embodiment of the present invention, the reducer structure 300 has a first gear and a second gear. The first gear is drivenly connected to the first crushing roller 210, and the second gear is drivenly connected to the second crushing roller 220 via a transmission member 310. The drive assembly further includes a tensioning structure 320, which abuts against the transmission member 310 and is used to tension the transmission member 310. Specifically, refer to... Figure 4 As shown, the reducer structure 300 has an output shaft, and the first gear and the second gear are both sleeved on the output shaft; the first central shaft 211 and the second central shaft 221 are both sleeved with gears, the first gear directly meshes with the gear on the first central shaft 211, and the second gear is connected to the gear on the second central shaft 221 through a transmission component 310, which can be a chain, belt or other structure.

[0060] Furthermore, the tensioning structure 320 includes a tensioning wheel 321 and a clamping spring 322. The tensioning wheel 321 abuts against the transmission component 310, and the two ends of the clamping spring 322 abut against the base frame 100 and the tensioning wheel 321, respectively. The clamping spring 322 is always in a compressed state.

[0061] In an embodiment of the present invention, the base frame 100 is equipped with a contact structure 600, which is disposed on the sliding path of the second crushing roller 220; specifically, refer to Figure 2 , Figure 3 As shown, the base frame 100 is provided with a first stop 140 and a second stop 150 spaced apart. The contact structure 600 is slidably installed between the first stop 140 and the second stop 150. A first spring 151 is provided between the contact structure 600 and the second stop 150. The sliding direction of the contact structure 600 is parallel to the length direction of the second mounting hole 120. When the second crushing roller 220 slides away from the first crushing roller 210 until the abutment sleeve 222 contacts the contact structure 600 and continues to slide, the abutment sleeve 222 can drive the first contact structure 600 to slide synchronously away from the first crushing roller 210, while compressing the first spring 151.

[0062] In an embodiment of the present invention, the second crushing roller 220 contacts the contact structure 600 regularly and a set number of times within a unit time period, and the contact structure 600 sends a distance warning signal to the control component. The contact structure 600 operates on a set unit time period as one cycle, with extremely short intervals between multiple cycles; for example, if the unit time is one minute, the contact structure 600 operates on a one-minute cycle, and immediately begins the next cycle after one minute, with almost no interval between two adjacent cycles. If the contact structure 600 contacts the abutment sleeve 222 multiple times within a cycle, and the contact is regularly repeated and reaches the set number of times, the contact structure 600 sends a distance warning signal to the control component. For example, if the set number is three, then within one minute, if the contact structure 600 contacts the abutment sleeve 222 once every 10 seconds, and this contact is repeated three times, that is, after 30 seconds, the contact structure 600 will send a distance warning signal to the control component.

[0063] Furthermore, the number of cycles can be set according to actual conditions, and the preferred cycle time is the duration of 3 to 8 rotations of the second crushing roller 220. The distance warning signal is mainly to detect whether an impurity is stuck on the first crushing roller 210 or the second crushing roller 220, causing the distance between the first crushing roller 210 and the second crushing roller 220 to increase regularly.

[0064] In an embodiment of the present invention, after the contact structure 600 contacts the abutment sleeve 222 and reaches a set delay time, the contact structure 600 sends a contact warning signal to the control component. Sending the contact warning signal to the control component via the contact structure 600 is mainly used to determine the distance between the first crushing roller 210 and the second crushing roller 220. If the control component receives the contact warning signal, it indicates that the distance between the first crushing roller 210 and the second crushing roller 220 is large, and the control component controls the guide plate 530 to switch to the second position; if the control component does not receive the contact warning signal, it indicates that the distance between the first crushing roller 210 and the second crushing roller 220 is small, and the control component controls the guide plate 530 to remain in the first position.

[0065] Reference Figure 3As shown, the contact structure 600 includes a second spring 630, a contact piece 620, and a contact button 610. The contact button 610 and the contact piece 620 are connected by the second spring 630. When the second crushing roller 220 slides along the length of the second mounting hole 120 until it abuts against the contact button 610 and continues to slide, the second crushing roller 220 pushes the contact button 610 to conduct with the contact piece 620. Specifically, within a unit of time, when the contact button 610 and the contact piece 620 conduct for a set number of times, the contact structure 600 sends a distance warning signal to the control component; after the contact button 610 and the contact piece 620 conduct for a set delay time, the contact structure 600 sends a contact warning signal to the control component.

[0066] In an embodiment of the present invention, the contact structure 600 further includes a housing 650, and the contact button 610, the contact piece 620, and the second spring 630 are all installed in the housing 650. The contact button 610 includes a button cover 611 and an extension rod 612. The button cover 611 and the extension rod 612 are fixedly connected. The extension rod 612 extends toward the contact piece 620, and the second spring 630 is sleeved on the outer periphery of the extension rod 612. When the second crushing roller 220 slides away from the first crushing roller 210, the abutting sleeve 222 will first contact the button cover 611. At this time, the second crushing roller 220 continues to slide away from the first crushing roller 210, and the abutting sleeve 222 will compress the second spring 630, so that the extension rod 612 contacts the contact piece 620 and conducts electricity. If the second crushing roller 220 continues to slide away from the first crushing roller 210, the abutting sleeve 222 will drive the box body 650 to slide towards the abutment plate 130 and compress the first spring 151. The elastic coefficient of the first spring 151 is less than that of the second spring 630, that is, the second spring 630 is easier to compress than the first spring 151.

[0067] Furthermore, refer to Figure 3 As shown, the contact structure 600 also includes a delay switch 640, which is connected to the contact piece 620 and is used to set the delay duration. The delay switch can be based on existing technology and will not be described in detail here.

[0068] In summary, if the extension rod 612 and the contact piece 620 make regular contact a set number of times within a unit time, the contact structure 600 sends a distance warning signal; if the extension rod 612 and the contact piece 620 continue to make contact for a delay period, the contact structure 600 sends a contact warning signal. The sensitivity of the distance warning signal and the contact warning signal can be adjusted by changing the set position of the first baffle; therefore, it is preferable that the first baffle is detachably connected to the base frame 100.

[0069] In another embodiment of the present invention, the abutment 130 is equipped with a ranging structure 131, and a distance warning signal is sent to the control component through the ranging structure 131. Specifically, the ranging structure 131 cyclically measures the axial length of the elastic structure 400 per unit time; if the ranging structure 131 measures a specific value of a certain axial length that occurs regularly and reaches a set number of times within a unit time, the ranging structure 131 sends a distance warning signal to the control component. (Refer to...) Figure 2 As shown, the ranging structure 131 is installed on the side of the abutment plate 130 facing the elastic structure 400. The ranging structure 131 can be a laser ranging device, etc. The axial length of the elastic structure 400 can indirectly reflect the distance between the first crushing roller 210 and the second crushing roller 220. If the axial length of the elastic structure 400 increases, it means that the distance between the first crushing roller 210 and the second crushing roller 220 decreases, and the crushed construction waste particles are small; if the axial length of the elastic structure 400 decreases, it means that the distance between the first crushing roller 210 and the second crushing roller 220 increases, and the crushed construction waste particles are large.

[0070] Furthermore, the ranging structure 131 measures in a set unit time cycle, with the intervals between multiple cycles being extremely short to almost negligible. For example, if the unit time is one minute, the ranging structure 131 measures the axial length of the elastic structure 400 in one-minute cycles. After one minute, the ranging structure 131 immediately begins the next cycle to measure the axial length of the elastic structure 400, with almost no interval between two adjacent cycles. If the ranging structure 131 detects a specific value of a certain axial length repeating itself regularly within a cycle, reaching a set number of repetitions, then the ranging structure 131 sends a distance warning signal to the control component. For example, if the set number of repetitions is three, the specific value of a certain axial length is 0.5m, and the unit time is also one minute, then if the ranging structure 131 detects a length value of 0.5m appearing every 10 seconds within one minute, repeating three times, that is, after 30 seconds, the ranging structure 131 will send a distance warning signal to the control component.

[0071] Furthermore, the number of times can be set according to the actual situation; the ranging structure 131 can be preset with a preset length value, then the specific value of a certain axial length must be greater than the preset length value, and the specific value of a certain axial length must appear regularly and reach the set number of times within a unit time before the ranging structure 131 sends a distance warning signal to the control component; the preset length value can be zero, and the duration of the unit time is preferably the duration of the second crushing roller 220 rotating 5 to 20 times.

[0072] In another embodiment of the present invention, a contact warning signal is also sent to the control component via the ranging structure 131. The ranging structure 131 has a preset warning length and a preset warning time. If the ranging structure 131 detects that the actual axial length of the elastic structure 400 is consistently less than the preset warning length within the preset warning time, then the ranging structure 131 sends a contact warning signal to the control component. The preset warning length cannot be zero, and the preset warning time should be at least greater than the time required for the second crushing roller 220 to rotate one revolution.

[0073] As described above, both the contact structure 600 and the ranging structure 131 can simultaneously send distance warning signals and contact warning signals to the control component. This means that the contact structure 600 and the ranging structure 131 can serve as backups and verifications for each other, preventing damage to the crushing device due to a failure in either structure. It is conceivable that in actual production, one could choose to activate only the contact structure 600 or the ranging structure 131, or activate both simultaneously as backups.

[0074] In an embodiment of the present invention, reference is made to Figure 2 As shown, the base frame 100 is also equipped with a pressure measuring structure 160, which is preferably a pressure sensor. When the second central shaft 221 slides to contact the end wall of the second mounting hole 120 away from the first mounting hole 110, the abutment sleeve 222 abuts against the pressure measuring structure 160. The pressure measuring structure 160 is preset with a warning pressure. If the pressure value detected by the pressure measuring structure 160 exceeds the warning pressure, the pressure measuring structure 160 sends a pressure warning signal to the control component. After receiving the pressure warning signal, the control component will control the reducer structure 300 to switch between forward gear, reverse gear, and neutral gear. If the control component receives a pressure warning signal from the pressure measuring structure 160, it indicates that even after the distance between the first crushing roller 210 and the second crushing roller 220 reaches its maximum, the distance between them is still insufficient. This results in the second crushing roller 220 still having to withstand significant pressure, indicating that the construction waste to be crushed exceeds the applicable range of the crushing device in this embodiment. If operation continues, it may easily lead to damage to the first crushing roller 210 or the second crushing roller 220. Therefore, the pressure measuring structure 160 is provided to send a pressure warning signal to the control component, thereby protecting the crushing device in this embodiment.

[0075] According to a second aspect of the present invention, the control method is applicable to the above-described crushing device, and the method comprises:

[0076] The control component executes a control strategy based on the distance warning signal, and the control strategy controls the reducer structure 300 to switch between forward gear, reverse gear, and neutral gear; specifically, refer to... Figure 1As shown, in this embodiment of the crushing device, the first crushing structure on the first crushing roller 210 and the second crushing structure on the second crushing roller 220 are both directional. When the reducer structure 300 is in forward gear, the first crushing roller 210 and the second crushing roller 220 are used to crush the construction waste between them. When the reducer structure 300 is in reverse gear, the first crushing roller 210 and the second crushing roller 220 can push out some of the construction waste located between them. When the reducer structure 300 is in neutral gear, both the first crushing roller 210 and the second crushing roller 220 stop rotating. The control strategy is as follows:

[0077] 1. The reducer structure 300 switches from forward gear to reverse gear and operates for a first set time. The first set time can be set according to the actual situation. Preferably, the first set time is set to the time when the second crushing roller 220 rotates 3 to 10 times, so as to push out part of the construction waste located between the first crushing roller 210 and the second crushing roller 220.

[0078] 2. The reducer structure 300 switches to forward gear and operates for a second set time. If the control component receives a distance warning signal within the second set time, the reducer structure 300 switches to neutral gear and the control component issues an audible and visual alarm. The second set time can be set to be equal to or different from the first set time. The second set time is also preferably set to the time for the second crushing roller 220 to rotate 3 to 10 times.

[0079] If the control component does not receive a distance warning signal within the second set time period, the reducer structure 300 will continue to operate in forward gear and exit the control strategy. After exiting the control strategy, if the control component receives a distance warning signal again, it will re-execute the control strategy.

[0080] As described above, the distance warning signal is mainly used to detect whether an impurity is stuck on the first crushing roller 210 or the second crushing roller 220, causing the distance between the first crushing roller 210 and the second crushing roller 220 to increase regularly. If the reducer structure 300 is in reverse gear, the first crushing roller 210 and the second crushing roller 220 can push out the impurity between them, and the control component will not receive the distance warning signal within the second set time period, and the crushing device in this embodiment will continue to be used. If the reducer structure 300 is in reverse gear, the first crushing roller 210 and the second crushing roller 220 fail to push out the impurity between them, and the control component will receive the distance warning signal within the second set time period. The reducer structure 300 will switch to neutral gear, causing the first crushing roller 210 and the second crushing roller 220 to stop rotating. The control component will issue an audible and visual alarm to remind personnel to check and handle the situation.

[0081] It should be noted that the second set duration should be no less than the unit time required for measuring the distance warning signal.

[0082] In an embodiment of the present invention, the control component controls the drive motor to switch from high speed to low speed according to the temperature warning signal; specifically, generally speaking, when the drive motor is in low speed, the rotation speed of the first crushing roller 210 and the second crushing roller 220 is relatively low, and when the drive motor is in high speed, the rotation speed of the first crushing roller 210 and the second crushing roller 220 is relatively high. If the control component receives a temperature warning signal, it will control the drive motor to switch from high speed to low speed and operate for a third set time.

[0083] If the temperature of the drive motor drops below the warning temperature within the third set time period, the temperature warning signal disappears, and the drive motor switches from low speed to high speed.

[0084] If the temperature of the drive motor remains above the warning temperature within the third set time period, the control component will issue an audible and visual alarm to remind personnel to check and handle the situation.

[0085] In an embodiment of the present invention, the control component controls the guide plate 530 to switch from a first position to a second position according to the contact warning signal. Specifically, when the control component receives the contact warning signal, it controls the guide plate 530 to switch to the second position; if the contact warning signal disappears, the control component controls the guide plate 530 to remain in the first position.

[0086] It is conceivable that when the control component receives a contact warning signal, it can also control the drive motor to switch from high speed to low speed accordingly.

[0087] In an embodiment of the present invention, when the control component receives a pressure warning signal, the control component drives the reducer structure 300 to switch from forward gear to reverse gear and operate for a fourth set time, and then switches to neutral gear. At the same time, the control component issues an audible and visual alarm.

[0088] According to the concrete production crushing device and control method of the present invention, the control component adopts different control methods according to different warning signals, which can effectively reduce equipment failures and thus extend the service life of the equipment.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0090] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A crushing device for concrete production, characterized in that, include: The base frame is provided with a first mounting hole, a second mounting hole, and a backing plate; The crushing assembly includes a first crushing roller and a second crushing roller that cooperate with each other. The first crushing roller is rotatably mounted in the first mounting hole about its own axis, and the second crushing roller is rotatably mounted in the second mounting hole about its own axis. The second crushing roller can slide along the length direction of the second mounting hole. An elastic structure is installed on the base frame, with its two ends abutting against the second crushing roller and the abutment plate, respectively. A collection chamber, located below the crushing component, includes a first chamber body and a second chamber body; A guide plate is disposed between the crushing component and the collection chamber for guiding the crushed concrete blocks; the guide plate has a first position for guiding the crushed concrete blocks into the first chamber and a second position for guiding the crushed concrete blocks into the second chamber. The drive assembly includes a drive motor and a reducer structure. The drive motor is connected to the crushing assembly via the reducer structure. The drive motor has a low-speed gear and a high-speed gear, and the reducer structure has three gears: forward gear, reverse gear, and neutral gear. The control component is used to control the drive motor to switch between low speed and high speed, to control the reducer structure to switch between forward, reverse and neutral, and to control the guide plate to switch between the first position and the second position. The base frame is equipped with a contact structure, which is located on the sliding path of the second crushing roller. Within a unit of time, the second crushing roller regularly contacts the contact structure and reaches a set number of times. The contact structure then sends a distance warning signal to the control component. The base frame is provided with a first stop and a second stop that are spaced apart. The contact structure is slidably installed between the first stop and the second stop. A first spring is provided between the contact structure and the second stop. The sliding direction of the contact structure is parallel to the length direction of the second mounting hole.

2. The concrete crushing device according to claim 1, characterized in that: After the contact structure contacts the second crushing roller and reaches the set delay time, the contact structure sends a contact warning signal to the control component.

3. The concrete crushing device according to claim 2, characterized in that: The contact structure includes a second spring, a contact piece, and a contact button, wherein the contact button is connected to the contact piece via the second spring; When the second crushing roller slides along the length of the second mounting hole until it abuts against the contact button and continues to slide, the second crushing roller pushes the contact button to connect with the contact piece. Within a unit of time, when the contact button and the contact piece are connected and the set number of times are reached, the contact structure sends a distance warning signal to the control component; After the contact button and the contact piece are connected and the set delay time is reached, the contact structure sends a contact warning signal to the control component.

4. The concrete crushing device according to claim 3, characterized in that: The contact structure also includes a delay switch, which is connected to the contact piece and is used to set the delay duration.

5. The concrete crushing device according to claim 1, characterized in that: The drive motor is equipped with a temperature measuring structure, which is used to detect the temperature of the drive motor housing. The temperature measuring structure is preset with a warning temperature. If the temperature of the drive motor housing exceeds the warning temperature, the temperature measuring structure sends a temperature warning signal to the control component.

6. The concrete crushing device according to claim 1, characterized in that: The reducer structure has a first gear and a second gear. The first gear is connected to the first crushing roller, and the second gear is connected to the second crushing roller through a transmission component. The drive assembly further includes a tensioning structure that abuts against the transmission member and is used to tension the transmission member.

7. A method for controlling a crushing device, applicable to the crushing device for concrete production as described in any one of claims 1 to 6, characterized in that, The control method is as follows: The control component executes a control strategy based on the distance warning signal, and the control strategy controls the reducer structure to switch between forward gear, reverse gear, and neutral gear. The control component controls the drive motor to switch from high speed to low speed based on the temperature warning signal; The control component controls the guide plate to switch from the first position to the second position based on the contact warning signal.

8. The crushing device control method according to claim 7, characterized in that: The control strategy is as follows: The reducer structure switches from forward gear to reverse gear and operates for a first set time. If the reducer switches to forward gear and operates for a second set time, and the control component receives the distance warning signal within the second set time, the reducer switches to neutral gear and the control component issues an audible and visual alarm.

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