Sand making machine and sand making production line

Abstract

The application discloses a sand making machine and a sand making production line. The sand making machine comprises a sand making device, a discharging device and a detection device. The sand making device is used for crushing aggregates. The discharging device comprises a discharging bin and a valve assembly. The discharging bin is used for bearing the crushed aggregates from the sand making device. The bottom of the discharging bin is formed with a main discharging channel and an auxiliary discharging channel. The valve assembly is arranged on the discharging bin and is used for opening and closing the auxiliary discharging channel. The detection device is arranged in the discharging bin and is used for detecting the aggregate accumulation height in the discharging bin, so that the valve assembly can be controlled to be opened and closed according to the detection result. The sand making machine can effectively avoid the machine jamming failure caused by the blockage phenomenon, thereby achieving the purposes of maintaining the normal production efficiency of the sand making production line and prolonging the service life of the equipment.

Description

Technical Field

[0001] This invention belongs to the field of concrete production technology, specifically relating to a sand making machine and a sand making production line. Background Technology

[0002] Sand and gravel aggregates are widely used building materials in the construction industry. Due to the ban and restriction on mining, the use of traditional natural sand has gradually decreased, and manufactured sand has been replaced, becoming the mainstream material used in the sand and gravel aggregate industry. Sand making machines are used to process ≤40mm crushed stone into ≤5mm manufactured sand. They are key equipment in manufactured sand production lines. Their discharge devices have a large material flow rate and complex particle size composition, resulting in a significant amount of powdery material after crushing, which can easily cause poor material flow. High moisture content in the raw materials exacerbates this problem. If not detected and addressed promptly, this can lead to a reduction in the discharge device's flow rate, causing continuous accumulation of crushed aggregate. When this affects rotor operation, it can overload the drive motor, leading to emergency shutdowns and machine stalling, thus impacting the production efficiency of the manufactured sand production line and the service life of the sand making machine. Summary of the Invention

[0003] To address the aforementioned defects or deficiencies, this invention provides a sand making machine and a sand making production line, aiming to solve the technical problem that existing sand making machines cannot promptly clear clogged crushed aggregates, leading to drive motor stalling.

[0004] To achieve the above objectives, the present invention provides a sand making machine, wherein the sand making machine includes a sand making device, a discharge device, and a detection device; the sand making device is used to crush aggregates; the discharge device includes a discharge hopper and a valve assembly, the discharge hopper is used to carry the crushed aggregates from the sand making device, and a main discharge channel and an auxiliary discharge channel are formed at the bottom of the discharge hopper; the valve assembly is located on the discharge hopper and is used to open and close the auxiliary discharge channel; the detection device is located inside the discharge hopper and is used to detect the aggregate accumulation height inside the discharge hopper, so that the valve assembly can be opened and closed according to the detection results.

[0005] In this embodiment of the invention, the sand making machine further includes a controller communicatively connected to the detection device, the controller being configured to:

[0006] The detection results from the detection device are acquired in real time, and the time points at different aggregate accumulation heights are recorded.

[0007] The required opening degree of the valve assembly is determined based on the time point;

[0008] The control valve assembly is opened to adjust the opening degree.

[0009] In this embodiment of the invention, the detection device includes two level sensors that are communicatively connected to the controller. The two level sensors are arranged at intervals from bottom to top at a first preset height and a second preset height in the discharge hopper. The device acquires the detection results in real time and records the time points at different aggregate accumulation heights, including:

[0010] When the aggregate accumulation height reaches the first preset height, record the current time as the first time point;

[0011] When the aggregate accumulation height reaches the second preset height, record the current time as the second time point.

[0012] In this embodiment of the invention, determining the opening degree to be adjusted of the valve assembly based on a time point includes:

[0013] Calculate the time interval between the first time point and the second time point;

[0014] If the time interval is less than the first preset duration, the opening to be adjusted is set to 50%; and

[0015] If the time interval is greater than or equal to the first preset duration, the opening to be adjusted is set to 100%.

[0016] In this embodiment of the invention, after the control valve assembly is opened to the desired opening degree, it further includes:

[0017] After a second preset time interval, the control valve assembly closes the discharge auxiliary channel;

[0018] The detection results of the detection device are obtained, and the sand making device is stopped when the aggregate accumulation height reaches the first preset height.

[0019] In this embodiment of the invention, the sand making machine further includes a reminder device, and the controller is further configured to:

[0020] When the aggregate accumulation height reaches the first preset height, the control and reminder device will issue a reminder signal.

[0021] In this embodiment of the invention, the valve assembly includes a valve plate and a telescopic drive. The valve plate is laterally slidable onto the discharge auxiliary channel corresponding to the opening of the discharge auxiliary channel. The telescopic drive is located on the outside of the discharge hopper and drives the valve plate to open and close the opening of the discharge auxiliary channel.

[0022] In this embodiment of the invention, two supporting guide rails are provided on the two side walls of the discharge auxiliary channel in a corresponding manner, and a pull-out port corresponding to the same end of the two supporting guide rails is also provided on the discharge auxiliary channel. The first end of the valve plate can extend into the discharge auxiliary channel from the pull-out port, and the opposite sides of the valve plate slide into the two supporting guide rails in a corresponding manner. The telescopic drive component is driven to connect with the second end of the valve plate located on the outer side.

[0023] In this embodiment of the invention, the discharge bin includes a discharge hopper and a guide section located at the lower end of the discharge hopper. The upper end of the discharge hopper is connected to the crushing device. The main discharge channel is inclined outward from the corner of the lower end of the guide section in a downward direction. The projection of the outlet of the discharge hopper in the inclined direction of the main discharge channel falls into the inner cavity of the main discharge channel. The auxiliary discharge channel is located on one side of the main discharge channel and is set directly opposite the outlet of the discharge hopper.

[0024] To achieve the above objectives, the present invention also provides a sand making production line, wherein the sand making production line includes the aforementioned sand making machine.

[0025] Through the above technical solutions, the sand making machine provided in the embodiments of the present invention has the following beneficial effects:

[0026] When using the aforementioned sand making machine, the aggregate, after being crushed by the sand making device, enters the discharge hopper. Under normal operating conditions, the valve assembly is normally closed, and the crushed aggregate can only be discharged along the main discharge channel. When blockage occurs in the discharge hopper, the crushed aggregate cannot be discharged from the main discharge channel in time and will gradually accumulate in the discharge hopper. The detection device is used to detect the height of aggregate accumulation in the discharge hopper. Based on the detection results, the valve assembly can be controlled to open or close the auxiliary discharge channel. After the valve assembly opens the auxiliary discharge channel, some crushed aggregate can be discharged from the auxiliary discharge channel, thereby increasing the discharge speed of the equipment and achieving the purpose of solving the blockage problem. By setting up the discharge device and the detection device, machine stalling caused by blockage can be effectively avoided, maintaining the normal production efficiency of the sand making production line and improving the service life of the sand making device.

[0027] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0028] The accompanying drawings are provided to illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of a sand making machine according to an embodiment of the present invention;

[0030] Figure 2 This is a detailed structural diagram of a sand making machine according to an embodiment of the present invention;

[0031] Figure 3 This is a side view of a valve assembly according to an embodiment of the present invention;

[0032] Figure 4 This is a top view of a valve assembly according to an embodiment of the present invention;

[0033] Figure 5 This is a diagram illustrating the execution steps of a controller according to an embodiment of the present invention;

[0034] Figure 6 yes Figure 5 Detailed execution steps of step S200;

[0035] Figure 7 This is a control flowchart of a controller according to an embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures

[0037] 1. Sand making device 11. First feed pipe

[0038] 12 Feed hopper 13 Second feed pipe

[0039] 14 Crushing chamber 15 Surrounding guard plate

[0040] 16 Rotor 17 Frame

[0041] 18 Drive motor 19 V-belt

[0042] 2 Discharge device 21 Discharge bin

[0043] 211 Main discharge channel 212 Auxiliary discharge channel

[0044] 213 Discharge hopper 214 Material guide section

[0045] 215 Valve body 22 Valve assembly

[0046] 221 Valve plate 222 Telescopic drive component

[0047] 223 Support rail 3 Detection device

[0048] 31. Level sensor 4. Controller Detailed Implementation

[0049] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0050] The sand making machine of the present invention will now be described with reference to the accompanying drawings.

[0051] like Figure 1 As shown, the present invention provides a sand making machine, wherein the sand making machine includes:

[0052] Sand making device 1 is used to crush aggregates;

[0053] The discharge device 2 includes a discharge bin 21 and a valve assembly 22. The discharge bin 21 is used to carry crushed aggregate from the sand making device 1. The bottom of the discharge bin 21 forms a main discharge channel 211 and a secondary discharge channel 212. The valve assembly 22 is located on the discharge bin 21 and is used to open and close the secondary discharge channel 212.

[0054] The detection device 3 is installed in the discharge hopper 21 and is used to detect the height of aggregate accumulation in the discharge hopper 21 so that the valve assembly 22 can be opened and closed according to the detection results.

[0055] When using the aforementioned sand making machine, the aggregate, after being crushed by the sand making device 1, enters the discharge hopper 21. Under normal operating conditions, the valve assembly 22 is normally closed, and the crushed aggregate can only be discharged along the main discharge channel 211. When blockage occurs in the discharge hopper 21 and the main discharge channel 211, the crushed aggregate cannot be discharged from the main discharge channel 211 in time and will gradually accumulate in the discharge hopper 21. The detection device 3 is used to detect the aggregate accumulation height in the discharge hopper 21. Based on the detection result of the detection device 3, the valve assembly 22 can be controlled to open or close the auxiliary discharge channel 212. After the valve assembly 22 opens the auxiliary discharge channel 212, some of the crushed aggregate can be discharged from the auxiliary discharge channel 212, thereby increasing the discharge speed of the equipment and achieving the purpose of solving the blockage problem. By setting the discharge device 2 and the detection device 3, the machine blockage caused by the blockage can be effectively avoided, the normal production efficiency of the sand making production line can be maintained, and the service life of the sand making device 1 can be improved.

[0056] Specifically, the structure of the sand making device 1 is as follows: Figure 2 As shown, the sand making device 1 includes a first feed pipe 11, a feed bin 12, and a crushing bin 14 arranged sequentially from top to bottom. The first feed pipe 11 is connected to an external feeding device. The feed bin 12 and the crushing bin 14 are connected by a second feed pipe 13. The feed bin 12 has a certain capacity and can temporarily store aggregates to prevent aggregate overflow caused by the aggregate feeding speed exceeding the processing capacity of the sand making device 1. The crushing bin 14 includes two compartments separated by an upper and lower partition. The upper compartment contains a rotor 16 and multiple peripheral guard plates 15 arranged around the rotor 16. The connecting shaft of the rotor 16 extends into the lower compartment. A frame 17 and a drive motor 18 are arranged on the outside of the crushing bin 14. The sand making device 1 is mounted and fixed on a concrete or other steel structure platform via the frame 17. The drive motor 18 is connected to the connecting shaft via a V-belt 19. The controller 4 is connected to the detection device 3 and the valve assembly 22 via cables to read data and transmit control commands. The working process of the sand making device 1 is as follows:

[0057] Aggregate enters the crushing chamber 14 through the second feed pipe 13. The rotor 16 rotates at high speed under the action of the drive motor 18. The aggregate entering the rotor 16 is ejected from the rotor 16's discharge port under centrifugal force, colliding with the surrounding guard plates 15 evenly distributed throughout the crushing chamber 14. This causes the aggregate to be crushed, achieving the effect of sand making. The crushed aggregate is discharged from the discharge hopper 21 to enter the next process of the sand making production line.

[0058] like Figure 5 As shown, in this embodiment of the invention, the sand making machine further includes a controller 4 that is communicatively connected to the detection device 3. The controller 4 is configured to:

[0059] Step S100: Acquire the detection results of the detection device 3 in real time and record the time points of different aggregate accumulation heights;

[0060] Specifically, during the crushing process, crushed stone aggregate produces powdery materials. When the moisture content is high, these materials tend to clump together in the discharge hopper 21 and the main discharge channel 211, causing the discharge opening to narrow and resulting in poor material flow. Depending on the degree of clumping, the blockage situation varies. If the clumping is mild, the weight of the crushed aggregate accumulated at the clumping site increases as it falls. When the weight of the crushed aggregate exceeds a certain value, the clumps will break or fall off the inner wall of the discharge hopper 21, thus alleviating the blockage problem and reducing the aggregate accumulation height. If the clumping is severe, the crushed aggregate will accumulate at the clumping site for a long time, further aggravating the clumping problem and making the blockage more serious, and the aggregate accumulation height will gradually increase. By recording the time points of different aggregate accumulation heights, the actual material blockage situation inside the crushing chamber can be further determined. Only when the material blockage problem gradually becomes serious will subsequent steps be controlled. Compared with the judgment method that relies solely on the results of a single test, this avoids repeatedly opening and closing the valve assembly 22, allowing the crushed aggregate to exit the main material channel 211 as much as possible.

[0061] Step S200: Determine the opening degree to be adjusted for valve assembly 22 based on the time point;

[0062] In step S300, the control valve assembly 22 is opened to adjust the opening degree.

[0063] like Figure 2 and Figure 6 As shown, in this embodiment of the invention, the detection device 3 includes two level sensors 31 that are communicatively connected to the controller 4. The two level sensors 31 are arranged at intervals from bottom to top at a first preset height and a second preset height of the discharge hopper 21, acquiring the detection results of the detection device 3 in real time and recording the time points of different aggregate accumulation heights, including:

[0064] Step S110: When the aggregate accumulation height reaches the first preset height, record the current time as the first time point;

[0065] Step S120: When the aggregate accumulation height reaches the second preset height, record the current time as the second time point;

[0066] Specifically, when material blockage occurs in the discharge hopper 21, the crushed aggregate will gradually accumulate in the discharge hopper 213. The faster the accumulation speed, the slower the discharge speed of the crushed aggregate, which indicates a more severe blockage. The controller 4 can then determine the degree of blockage based on the time interval between the first and second time points. Step S200, determining the adjustment opening of the valve assembly 22 based on the time point, further includes: calculating the time interval between the first and second time points, and determining the adjustment opening of the valve assembly 22 based on the time interval.

[0067] In this embodiment of the invention, determining the opening degree to be adjusted of the valve assembly 22 based on the time interval includes: determining the opening degree to be adjusted to 50% when the time interval is less than a first preset duration; and determining the opening degree to be adjusted to 100% when the time interval is greater than or equal to the first preset duration. Specifically, the value of the first preset duration is determined according to the operating parameters of the sand making device 1.

[0068] Two level sensors 31 detect the aggregate height in the discharge hopper 213. When the level sensor 31 at the first preset height sends a detection signal, it indicates that a blockage has occurred in the discharge hopper 21. The controller 4 records the current time point as the first time point. Afterward, three scenarios may occur: First, the aggregate height drops below the first preset height, indicating a minor blockage that can naturally resolve with the sand-making process; the controller 4 does not need to control the valve assembly 22. Second, the aggregate accumulation height continues to increase and reaches the second preset height. At this time, the level sensor 31 at the second preset height sends a detection signal, and the controller 4 records... The current time point is the second time point, and the time interval between the first and second time points is less than the first preset duration, indicating that the blockage is moderate and cannot be relieved naturally. In this case, the controller 4 controls the valve assembly 22 to open to 50%. The third scenario is that the aggregate accumulation height continues to increase and reaches the second preset height. In this case, the level sensor 31 located at the second preset height sends a detection signal, and the controller 4 records the current time point as the second time point. Furthermore, the time interval between the first and second time points is greater than or equal to the first preset duration, indicating that the blockage is severe. In this case, the controller 4 controls the valve assembly 22 to open to 100%. The controller 4 executes different control strategies according to the degree of blockage, ensuring that the crushed aggregate is discharged from the main discharge channel 211 as much as possible while resolving the blockage problem, thus guaranteeing normal production.

[0069] In other embodiments of the present invention, a correspondence function between the opening degree to be adjusted and the time interval can be established, and the controller 4 can calculate the precise value of the opening degree to be adjusted based on the actual negative time interval and the function.

[0070] In this embodiment of the invention, after step S300, controlling the valve assembly 22 to open to the desired opening degree, further includes:

[0071] After a second preset time interval, control valve assembly 22 closes the discharge auxiliary channel 212;

[0072] The detection results of the detection device 3 are obtained, and the sand making device 1 is stopped when the aggregate accumulation height reaches the first preset height.

[0073] Specifically, since the discharge auxiliary channel 212 is only used to alleviate the material blockage problem and should not be kept open for a long time, the controller 4 is configured to control the valve assembly 22 to close the discharge auxiliary channel 212 at intervals of a second preset time. After the discharge auxiliary channel 212 is closed, the material level sensor 31 located at a first preset height will detect the aggregate accumulation height again. If the aggregate accumulation height is lower than the preset height, it means that the material blockage problem has been solved. If the aggregate accumulation height is higher than or equal to the first preset height, it means that the material blockage is extremely serious and it is difficult to solve the material blockage problem by simply opening the discharge auxiliary channel 212. In this case, the controller 4 will control the sand making device 1 to stop and the material blockage problem will be solved by manual intervention.

[0074] In this embodiment of the invention, the sand making machine also includes a reminder device, and the controller 4 is further configured to: when the aggregate accumulation height reaches a first preset height, control the reminder device to issue a reminder signal to prompt the operator to perform timely maintenance on the sand making machine after production. Specifically, the reminder device may be a signal light, a display screen, etc.

[0075] Specifically, see Figure 7 The control flow of controller 4 is as follows:

[0076] Obtain the aggregate height measured by the detection device;

[0077] Determine whether the aggregate accumulation height is greater than or equal to the first preset height; if not, control the sand making device 1 to execute the normal production mode; if yes, execute the subsequent steps.

[0078] Record the time point at which the aggregate accumulation height reaches the first preset height;

[0079] Determine whether the aggregate accumulation height is greater than or equal to the second preset height; if not, control the sand making device 1 to execute the normal production mode; if yes, execute the subsequent steps.

[0080] Record the time point at which the aggregate accumulation height reaches the second preset height;

[0081] Determine whether the time interval is less than the first preset duration; if yes, control valve assembly 22 to open to 100% of the opening to be adjusted; otherwise, control valve assembly 22 to open to 50% of the opening to be adjusted.

[0082] like Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment of the invention, the valve assembly 22 includes a valve plate 221 and a telescopic drive member 222. The valve plate 221 is laterally slidable onto the discharge auxiliary channel 212, corresponding to the opening of the discharge auxiliary channel 212. The telescopic drive member 222 is located on the outside of the discharge bin 21 and is connected to the valve plate 221 to drive the valve plate 221 to open and close the opening of the discharge auxiliary channel 212. The opening degree of the valve plate 221 can be controlled by controlling the stroke of the telescopic drive member 222.

[0083] Specifically, two supporting guide rails 223 are correspondingly arranged on the two opposite side walls of the discharge auxiliary channel 212, and a pull-out opening corresponding to the same end of the two supporting guide rails 223 is also provided on the discharge auxiliary channel 212. The first end of the valve plate 221 can extend into the discharge auxiliary channel 212 through the pull-out opening, and the opposite sides of the valve plate 221 slide into the two supporting guide rails 223 respectively. The telescopic drive member 222 is drivenly connected to the second end of the valve plate 221 located on the outer side. On the one hand, the supporting guide rails 223 provide guidance for the movement of the valve plate 221, improving the stability of the valve plate 221's pull-out movement. On the other hand, when the valve plate 221 is closed or the discharge auxiliary channel 212 is closed, the crushed aggregate will partially accumulate on the valve plate 221, and the supporting guide rails 223 can provide support for the valve plate 221, preventing the valve plate 221 from being deformed by pressure.

[0084] Of course, the present invention is not limited to this. The valve assembly 22 can also adopt a rotating structure, including a flap and a rotating drive. The flap is rotatably disposed in the discharge auxiliary channel 212, and the rotating drive is disposed on the outside of the discharge bin 21 and drives the connecting valve plate 221. By controlling the rotation angle of the rotating drive, the opening degree of the flap can be controlled accordingly.

[0085] In this embodiment of the invention, the discharge bin includes a discharge hopper 213 and a guide section 214 located at the lower end of the discharge hopper 213. The upper end of the discharge hopper 213 is connected to the sand making device 1. The sand making machine is used in the sand making production line. The various equipment of the manufactured sand production line are arranged sequentially from top to bottom. The sand making machine is horizontally offset from the production equipment below. The main discharge channel 211 is inclined outward from the lower corner of the guide section 214 in a downward direction to connect with the production equipment below. The projection of the outlet of the discharge hopper 213 in the inclined direction of the main discharge channel 211 falls into the inner cavity of the main discharge channel 211, ensuring that the crushed aggregate can be smoothly discharged along the main discharge channel during normal production. The auxiliary discharge channel 212 is located on one side of the main discharge channel 211 and is set directly opposite the outlet of the discharge hopper 213. When a blockage occurs and the valve assembly 22 is opened, the crushed aggregate can be discharged vertically along the auxiliary discharge channel 212, with a fast discharge speed.

[0086] Specifically, the main discharge channel 211 and the auxiliary discharge channel 212 each have different conveying lines. The conveying line corresponding to the main discharge channel 211 is used to transport the crushed aggregate to the next process, while the conveying line corresponding to the auxiliary discharge channel 212 is used to reintroduce the crushed aggregate into the sand making device 1.

[0087] Furthermore, the main discharge channel 211 and the guide section 214 are integrally set, and the valve body 215, which forms the auxiliary discharge channel 212, is detachably connected to the lower end of the guide section 214. During maintenance, maintenance personnel can remove the valve body 215 to clean and maintain the inside of the sand making machine, as well as the support guide rail 223 and valve plate 221.

[0088] Furthermore, the discharge auxiliary channel 212 and the conveyor line below are spaced apart, allowing the crushed aggregate to fall vertically without the need for a guide pipe. The gap between the discharge auxiliary channel 212 and the conveyor line is also designed to allow operators to clean the inside of the sand making machine through the discharge auxiliary channel 212.

[0089] To achieve the above objectives, the present invention also provides a sand making production line, wherein the sand making production line includes the aforementioned sand making machine. Since the sand making production line adopts all the technical solutions of the above embodiments, it has the following beneficial effects:

[0090] The blockage of the discharge device 2 is automatically detected, analyzed and identified by the controller 4, which can promptly discover and solve the problem that is difficult or impossible for humans to observe in a confined space in the existing solution.

[0091] The system automatically assesses the degree of material blockage and outputs different strategies based on the degree of blockage. It also automatically runs a self-cleaning operation to avoid emergency shutdowns that could lead to machine malfunctions, resulting in high overall production line efficiency.

[0092] It has a high degree of automation, with the controller 4 automatically judging and processing the data. The judgment criteria are uniform, and human intervention is minimal, avoiding machine malfunctions caused by inconsistent human judgment criteria.

[0093] To avoid irreversible damage to the equipment caused by emergency shutdown under high load during the operation of the sand making device 1, and to improve the service life of the sand making device 1.

[0094] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0095] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0096] 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 present 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0097] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sand making machine, characterized in that, The sand making machine includes: A sand making device (1) is used to crush aggregates; The discharge device (2) includes a discharge bin (21) and a valve assembly (22). The discharge bin (21) is used to carry crushed aggregate from the sand making device (1). The bottom of the discharge bin (21) forms a main discharge channel (211) and a secondary discharge channel (212). The valve assembly (22) is located on the discharge bin (21) and is used to open and close the secondary discharge channel (212). The detection device (3) is located in the discharge hopper (21) and is used to detect the aggregate accumulation height in the discharge hopper (21) so that the valve assembly (22) can be opened and closed according to the detection result. The sand making machine also includes a controller (4) that is communicatively connected to the detection device (3), and the controller (4) is configured to: The detection results of the detection device (3) are obtained in real time, and the time points of different aggregate accumulation heights are recorded; The degree of blockage is determined based on the time interval of different aggregate accumulation heights, and the corresponding valve assembly (22) opening to be adjusted is determined accordingly. The valve assembly (22) is controlled to open at the opening to be adjusted.

2. The sand making machine according to claim 1, characterized in that, The detection device (3) includes two level sensors (31) that are respectively connected to the controller (4). The two level sensors (31) are arranged at a first preset height and a second preset height of the discharge hopper (21) from bottom to top. The real-time acquisition of the detection results of the detection device (3) and the recording of different aggregate accumulation heights include: When the aggregate accumulation height reaches the first preset height, the current time is recorded as the first time point; When the aggregate accumulation height reaches the second preset height, the current time is recorded as the second time point.

3. The sand making machine according to claim 2, characterized in that, The step of determining the degree of blockage and the corresponding adjustment opening of the valve assembly (22) based on the time interval of different aggregate accumulation heights includes: Calculate the time interval between the first time point and the second time point; If the time interval is less than a first preset duration, the opening to be adjusted is set to 100%; and If the time interval is greater than or equal to the first preset duration, the opening to be adjusted is determined to be 50%.

4. The sand making machine according to claim 2, characterized in that, After the valve assembly (22) is opened to the desired opening degree, the method further includes: After a second preset time interval, the valve assembly (22) is controlled to close the discharge auxiliary channel (212). Obtain the detection results of the detection device (3), and control the sand making device (1) to stop when the aggregate accumulation height reaches the first preset height.

5. The sand making machine according to claim 2, characterized in that, The sand making machine also includes a reminder device, and the controller (4) is further configured to: When the aggregate accumulation height reaches the first preset height, the reminder device is controlled to issue a reminder signal.

6. The sand making machine according to any one of claims 1 to 5, characterized in that, The valve assembly (22) includes a valve plate (221) and a telescopic drive (222). The valve plate (221) is horizontally slidable on the discharge auxiliary channel (212) corresponding to the opening of the discharge auxiliary channel (212). The telescopic drive (222) is located on the outside of the discharge bin (21) and drives the valve plate (221) to open and close the opening of the discharge auxiliary channel (212).

7. The sand making machine according to claim 6, characterized in that, The discharge auxiliary channel (212) has two supporting guide rails (223) arranged on its two opposite side walls, and the discharge auxiliary channel (212) also has a pull-out opening that corresponds to the same end of the two supporting guide rails (223). The first end of the valve plate (221) can extend into the discharge auxiliary channel (212) from the pull-out opening, and the opposite sides of the valve plate (221) slide into the two supporting guide rails (223) respectively. The telescopic drive (222) is driven to connect with the second end of the valve plate (221) located on the outside.

8. The sand making machine according to any one of claims 1 to 5, characterized in that, The discharge bin (21) includes a discharge hopper (213) and a guide section (214) located at the lower end of the discharge hopper (213). The upper end of the discharge hopper (213) is connected to the sand making device (1). The main discharge channel (211) is inclined outward from the corner of the lower end of the guide section (214) in a downward direction. The projection of the outlet of the discharge hopper (213) in the inclined direction of the main discharge channel (211) falls into the inner cavity of the main discharge channel (211). The auxiliary discharge channel (212) is located on one side of the main discharge channel (211) and is set directly opposite the outlet of the discharge hopper (213).

9. A sand making production line, characterized in that, The sand making production line includes a sand making machine according to any one of claims 1 to 8.

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