Concrete mixing plant discharge system and concrete mixing plant

Abstract

The utility model relates to the field of mixing station discloses a concrete mixing station unloading system, include: unloading area and install in unloading area's monitoring device and display device, be provided with the material hopper and mixer truck in unloading area, the mixer truck sets up in the below of material hopper, the mixer truck is configured to move the mixer truck through the mixer truck driver, make the material hopper of mixer truck and material hopper align, the material hopper is used for connecting with the mixing host that is equipped with concrete, to transport concrete to the material hopper, monitoring device is used for monitoring the alignment state of material hopper and material hopper and the conveying state of material hopper to the material hopper conveying concrete, display device and monitoring device signal connection, to show the monitoring information of monitoring device to the mixer truck driver, through above technical scheme, the mixer truck driver can directly and fastly align the material hopper with material hopper and connect, has improved the work efficiency of unloading, can also reduce the operating personnel of participating in unloading work.

Description

Technical Field

[0001] This utility model relates to the field of batching plant technology, specifically to a concrete batching plant unloading system. Furthermore, this utility model also relates to a concrete batching plant. Background Technology

[0002] A concrete mixing plant is generally a production equipment for ready-mixed concrete. It is usually equipped with a mixing host, a discharge system, etc. Raw materials of different proportions are put into the mixing host in a certain order and mixed evenly to form concrete. The discharge system is used to unload the concrete in the mixing host onto a mixer truck, which then transports the concrete to the work site.

[0003] The main problem with existing unloading systems is their low unloading efficiency, the need for a large number of operators to participate in unloading, which affects the working efficiency of the mixing plant and its automated production. Utility Model Content

[0004] The purpose of this invention is to overcome the technical problems of low unloading efficiency and the need for a large number of operators in the existing technology, and to provide a concrete mixing plant unloading system. This unloading system can improve unloading efficiency and reduce the number of operators involved in the unloading work, thereby improving the working efficiency of the mixing plant and helping the mixing plant to achieve fully automated production.

[0005] To achieve the above objectives, this utility model provides a concrete mixing plant unloading system comprising: an unloading area, wherein a hopper and a mixer truck located below the hopper are provided within the unloading area; the mixer truck is configured such that its receiving hopper is aligned with the hopper by a mixer truck driver; the hopper is connected to a concrete mixing host to deliver concrete to the receiving hopper; a monitoring device installed within the unloading area to monitor the alignment status of the hopper and the receiving hopper, as well as the delivery status of concrete from the hopper to the receiving hopper; and a display device installed within the unloading area and signal-connected to the monitoring device to display monitoring information from the monitoring device to the mixer truck driver.

[0006] In some embodiments, the display device includes a display screen disposed in the unloading area, the display screen being signal-connected to the monitoring device, and the display screen being positioned in front of the mixer truck driver's field of vision.

[0007] In some embodiments, the unloading system includes a control device for the mixer truck driver to control the conveying state of the concrete from the hopper to the receiving hopper.

[0008] In some embodiments, the control device includes a control unit with a control box disposed in the unloading area, the control box including an alignment confirmation button.

[0009] In some embodiments, the control box includes a discharge gate switch knob for controlling the opening degree of the discharge gate of the mixing host.

[0010] In some embodiments, the control device includes a telescopic unit with one end fixed to the unloading area and the other end connected to the control box. The control unit includes a distance sensor for detecting the distance between the distance sensor and the mixer truck. The telescopic unit is configured to extend and reduce the distance between the control box and the mixer truck when the distance sensor detects that the distance between the distance sensor and the mixer truck remains unchanged and the distance is greater than a preset distance.

[0011] In some embodiments, the control unit includes a through-beam photoelectric sensor having a transmitter and a receiver disposed opposite to each other, the transmitter or the receiver being disposed close to the distance sensor, the through-beam photoelectric sensor being configured to activate the distance sensor when the mixer truck passes between the transmitter and the receiver.

[0012] In some embodiments, the distance sensor is installed at a height no higher than the lower edge of the side window of the mixer truck.

[0013] In some embodiments, the control box also includes a dust cover for protecting the alignment confirmation button.

[0014] Based on this, the present invention also provides a concrete mixing plant, including the aforementioned concrete mixing plant unloading system.

[0015] Through the above technical solution, a monitoring device is installed in the unloading area. This device monitors the alignment of the collecting hopper and the receiving hopper, as well as the conveying status of concrete from the collecting hopper to the receiving hopper. This conveying status includes the start and end of concrete conveying, and the speed of concrete conveying. A display device is installed in the unloading area and connected to the monitoring device, allowing the truck driver to see the monitoring information. Therefore, after the truck enters the unloading area, the driver can directly and quickly align the collecting hopper and the receiving hopper via the display device, without requiring other personnel to instruct the driver. This improves unloading efficiency and reduces the number of personnel involved in the unloading process, contributing to the full automation of the mixing plant. Furthermore, the truck driver can also use the display device to determine the conveying status of concrete from the collecting hopper to the receiving hopper and take appropriate measures to prevent overflow from the receiving hopper.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the concrete mixing plant unloading system provided by this utility model; Figure 2 This is a schematic diagram of one embodiment of the control device provided by this utility model.

[0018] Explanation of reference numerals in the attached figures 1-Unloading area; 2-Monitoring device; 3-Display screen; 4-Collecting hopper; 5-Receiving hopper; 6-Mixer truck; 7-Control box; 8-Mixer host; 9-Unloading door; 10-Control room; 11-Control system; 12-Telescopic unit; 13-Unloading door switch knob; 14-Alignment confirmation button; 15-Distance sensor; 16-Transmitter; 17-Receiver; 18-Dust cover; 19-Side window; 20-Initial position; 21-Extended position. Detailed Implementation

[0019] The specific embodiments of this utility model 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 scope of this utility model.

[0020] In this utility model, unless otherwise stated, the terms "upper," "lower," "left," "right," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In this utility model, the descriptions using terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. 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.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 utility model according to the specific circumstances.

[0023] A concrete mixing plant is generally a production facility for ready-mixed concrete. It typically includes a mixing unit and a discharge system. The discharge system is used to unload the concrete from the mixing unit onto a mixer truck. Currently, the process of unloading concrete from the mixing unit onto the mixer truck is usually as follows: The mixer truck driver drives the truck into the discharge area. Relying on the rearview mirror and driving experience, the driver reverses to align the receiving hopper and the aggregate hopper. However, due to the driver's experience and other factors, reversing can easily result in misalignment, causing the receiving hopper and aggregate hopper to fail to align. Therefore, in some existing technologies, a camera is installed in the discharge area. The camera transmits the image information captured in the discharge area to a control room outside the discharge area. The control room is usually separated from the discharge area by a wall. Operators in the control room observe the alignment of the receiving hopper and aggregate hopper through the monitoring video. When the mixer truck driver fails to align properly, the operator uses a loudspeaker or microphone to instruct the driver to reverse until the receiving hopper and aggregate hopper are aligned. In this method, the mixer truck driver can only indirectly obtain information about the alignment of the receiving hopper and the collecting hopper through the operator, which can easily lead to inaccurate alignment and a low tolerance for errors in the alignment process. Alternatively, existing technologies employ visual recognition combined with machine learning to locate the centers of the receiving and collecting hoppers and determine alignment by judging the distance between these two centers. However, this approach still requires the operator to inform the mixer truck driver whether the receiving and collecting hoppers are aligned, thus failing to reduce the operator's workload.

[0024] This utility model mainly addresses the technical problems of low unloading efficiency and the need for a large number of operators in existing unloading systems, and provides a concrete mixing plant unloading system. (See [reference]) Figure 1As shown, the unloading system includes: an unloading area 1, a monitoring device 2 installed within the unloading area 1, and a display device. The unloading area 1 contains a hopper 4 and a mixer truck 6. The mixer truck 6 is located below the hopper 4. The mixer truck 6 is configured so that the mixer truck driver moves the mixer truck 6 to align its receiving hopper 5 with the hopper 4. The hopper 4 is connected to a concrete mixing host 8 to deliver concrete to the receiving hopper 5. The monitoring device 2 monitors the alignment status of the hopper 4 and the receiving hopper 5, as well as the delivery status of concrete from the hopper 4 to the receiving hopper 5. The display device is signal-connected to the monitoring device 2 to display the monitoring information from the monitoring device 2 to the mixer truck driver.

[0025] In the concrete mixing plant unloading system of this utility model, a monitoring device 2 and a display device are installed in the unloading area 1. When the mixer truck 6 enters the unloading area 1, the monitoring device 2 can monitor the alignment status of the receiving hopper 5 and the collecting hopper 4. The mixer truck driver can observe the alignment status of the receiving hopper 5 and the collecting hopper 4 through the display device, and then operate the mixer truck 6 to quickly align the receiving hopper 5 and the collecting hopper 4, thereby improving the unloading efficiency. Moreover, during the unloading process, the mixer truck driver can directly observe the alignment status of the receiving hopper 5 and the collecting hopper 4, eliminating the need for operators in the control room to direct the mixer truck driver, reducing the difficulty of the mixer truck driver's reversing alignment operation; it also reduces the number of personnel involved in the unloading work, laying the foundation for unmanned and automated production of the mixing plant. In addition, the mixer truck driver can also observe the conveying status of concrete from the collecting hopper 4 to the receiving hopper 5 through the display device, so as to judge the risk of overflow or if overflow has already occurred in the receiving hopper, and thus take subsequent operations to avoid overflow.

[0026] In the unloading system of this utility model, the display device can be configured in various ways. In one embodiment, the display device includes a display screen installed in the cab of the mixer truck 6. The display screen is equipped with a mobile network module. A mobile network signal module is generally installed in the mixing plant. The display screen in the cab can be connected to the monitoring device 2 via a network signal, thereby enabling the display screen in the cab to display the monitoring information of the monitoring device 2 to the mixer truck driver.

[0027] In a preferred embodiment, the display device includes a display screen 3 disposed within the unloading area 1. The display screen 3 is signal-connected to the monitoring device 2 and is positioned in front of the mixer truck driver's field of vision. Therefore, when the mixer truck driver drives the mixer truck 6 into the unloading area 1, during the reversing process, he can directly observe the monitoring information from the monitoring device 2 through the display screen 3 in front of his field of vision, thereby observing the alignment status of the receiving hopper 5 and the collecting hopper 4, and thus achieving rapid alignment.

[0028] In some embodiments, the monitoring device 2 includes a camera that can capture monitoring information, such as monitoring video, of the receiving hopper 5 and the collecting hopper 4, and transmit the monitoring video to a display device so that the mixer truck driver can observe it.

[0029] In some implementations, the unloading system includes a control device for the mixer truck driver to control the conveying status of concrete from the hopper 4 to the receiving hopper 5, such as the start and end of the concrete conveying operation, the concrete conveying speed, etc., thereby reducing the workload of the operator and helping to achieve automated production throughout the entire process.

[0030] In one embodiment, the control device includes a touch screen installed in the cab of the mixer truck 6. The touch screen has a mobile network signal module and virtual buttons, such as the "alignment confirmation" and "unloading gate switch" virtual buttons described below. The mixer truck driver controls the conveying status of the concrete from the hopper 4 to the receiving hopper 5 by operating the virtual buttons.

[0031] In another embodiment, the control device includes a controller with a Bluetooth / wireless routing module. The mixer truck driver can use a mobile phone to connect to the signal transmitted by the Bluetooth / wireless routing module. After the connection is successful, a webpage with a fixed IP address can be opened. By operating the virtual buttons on the webpage, the driver can control the conveying status of the concrete from the hopper 4 to the receiving hopper 5.

[0032] Or, in a preferred embodiment, see [link to preferred embodiment]. Figure 1 and Figure 2 As shown, the control device includes a control unit, which includes a control box 7 located in the unloading area 1. The control box 7 includes an alignment confirmation button 14. After the mixer truck driver observes through the display device that the receiving hopper 5 and the collecting hopper 4 are aligned, he presses the alignment confirmation button 14. Then, the control system 11 located in the control room 10 automatically controls the unloading gate 9 of the mixer host 8 to open for unloading.

[0033] It should be noted that due to the different models of mixer trucks and the varying sizes of the receiving hoppers, using the same set of automatic unloading parameters can easily lead to overflow and spillage problems in the receiving hopper, contaminating the unloading area and causing material shortages in the mixing plant. Furthermore, cleaning the unloading area requires manpower and time, further increasing production costs. Existing technologies mainly employ two solutions to address the overflow and spillage problem in the receiving hopper. Solution 1: Adding a manual control knob to the unloading gate in the control room, operated by the operator. The operator can see through video monitoring that there is a risk of overflow or that overflow has already occurred. By rotating the knob, the opening of the unloading gate decreases, the unloading flow rate decreases, and the receiving hopper stops overflowing. This solution requires the operator to constantly monitor the video and control the unloading process, increasing the operator's workload. Option 2: Using visual recognition and machine learning, the edges of the liquid surface and the hopper are identified during the unloading process. When the edge of the liquid surface approaches the edge of the hopper, the opening of the unloading gate is automatically reduced, thereby controlling the flow rate of the unloading material and preventing overflow. However, since the hoppers are of different sizes, professional personnel are required to label and learn different hoppers, which is costly and technically challenging.

[0034] This utility model addresses the problem of material overflow and spillage from the receiving hopper. In a preferred embodiment, it refers to... Figure 2 As shown, the control box 7 includes a discharge gate switch knob 13, which controls the opening degree of the discharge gate 9 of the mixing host 8. Therefore, when the mixer truck driver observes through the display device that the concrete conveying speed is too fast and overflow is imminent, he can manually rotate the discharge gate switch knob 13 in the control box 7 to reduce the opening degree of the discharge gate 9, thereby decreasing the concrete conveying speed and preventing overflow. Thus, by adopting the preferred embodiment of this utility model, the problem of overflow in the receiving hopper can be avoided, while also having a lower technical threshold and cost. Moreover, by assigning the "alignment confirmation" and "discharge gate switch" control inputs to the mixer truck driver, the workload of the operator is further reduced, and even the operator's position can be eliminated, laying the foundation for unmanned production.

[0035] Furthermore, in some implementations, reference is made to... Figure 2As shown, the control device includes a telescopic unit 12. One end of the telescopic unit 12 is connected to a fixed component in the unloading area 1, and the other end is connected to the control box 7. The fixed component can be, for example, a wall or column in the unloading area 1. That is, one end of the telescopic unit 12 is fixed, and the other end is connected to the control box 7. The telescopic unit 12 performs telescopic movements, thereby driving the control box 7 to perform telescopic movements. The control unit includes a distance sensor 15, which is used to detect the distance between the distance sensor 15 and the mixer truck 6. The telescopic unit 12 is configured such that when the distance sensor 15 detects that its distance from the mixer truck 6 remains unchanged, the control system determines that the mixer truck 6 has stopped in place, that is, the receiving hopper 5 and the collecting hopper 4 are aligned. Further, if the distance between the distance sensor 15 and the mixer truck 6 is greater than a preset distance, the telescopic unit 12 extends, reducing the distance between the distance sensor 15 and the mixer truck 6. Preferably, the telescopic unit 12 extends so that the distance between the distance sensor 15 and the mixer truck 6 is less than or equal to a preset distance. When the distance between the distance sensor 15 and the mixer truck 6 reaches the preset distance, it is convenient for the mixer truck driver to operate the buttons on the control box 7 on the mixer truck 6 without having to get off the truck.

[0036] In one embodiment, the distance sensor 15 is located outside the control box 7, such as on a wall or column in the unloading area 1, and close to the control box 7. Therefore, the distance between the distance sensor 15 and the mixer truck 6 is approximately equal to the distance between the control box 7 and the mixer truck 6. The control system 11 determines the extension distance of the telescopic unit 12 based on the difference between this distance and a preset distance. Alternatively, in a preferred embodiment, see... Figure 2 As shown. The control distance sensor 15 is installed in the control box 7. When the telescopic unit 12 extends, the control box 7 and the distance sensor 15 move closer to the mixer truck 6. By using the distance data detected in real time by the distance sensor 15, the control system 11 determines whether the telescopic unit 12 needs to continue to extend, thereby improving the accuracy of adjusting the distance between the control box 7 and the mixer truck 6.

[0037] In some implementations, refer to Figure 2 As shown, the control unit also includes a through-beam photoelectric sensor. The light source of the through-beam photoelectric sensor can be, but is not limited to, infrared light, visible light, laser, etc. The through-beam photoelectric sensor includes a transmitter 16 and a receiver 17 arranged opposite to each other. The mixer truck 6 passes between the transmitter 16 and the receiver 17. The transmitter 16 and the receiver 17 can be respectively installed in the wall or column within the unloading area 1. See also Figure 2As shown, in one embodiment, the transmitter 16 and the distance sensor 15 are disposed inside the control box 7 and below the alignment confirmation button 14. The receiver 17 is disposed opposite to the transmitter 16 on the wall of the unloading area 1. When the mixer truck 6 passes between the transmitter 16 and the receiver 17, the light signal emitted by the transmitter 16 is blocked by the mixer truck 6. The control system 11 powers on the distance sensor 15, causing the distance sensor 15 to start detecting the distance between the distance sensor 15 and the mixer truck 6. When this distance is greater than a preset distance, the telescopic unit 12 begins to extend, causing the control box 7 to move toward the mixer truck 6. Through the synergistic effect of the through-beam photoelectric sensor and the distance sensor 15, the extension and retraction of the telescopic unit 12 can be controlled more precisely, making it less likely for the telescopic unit 12 to be falsely triggered. Moreover, the distance sensor 15 only starts working when the mixer truck 6 enters the unloading area 1 and blocks the through-beam photoelectric sensor, so the distance sensor 15 does not need to be continuously powered, thereby saving energy. In one variant, the transmitter 16 and receiver 17 are respectively disposed on opposite walls within the unloading area 1, with the transmitter 16 or receiver 17 positioned close to the distance sensor 15.

[0038] In some implementations, the preset distance is set to no more than 35cm, for example, a preset distance of 35cm ± 5cm, to facilitate the operation of the control box 7 by the mixer truck driver. See also Figure 2 As shown, before the telescopic unit 12 is activated, the control box 7 is in the initial position 20. When the distance sensor 15 detects that the distance between it and the mixer truck 6 is greater than a preset distance, the telescopic unit 12 extends until the distance between the control box 7 and the mixer truck 6 reaches the preset distance, at which point the telescopic unit 12 stops extending and is in the extended position 21. After unloading is completed, the mixer truck 6 leaves the unloading area 1, and the receiver 17 receives the light signal emitted by the transmitter 16 again. The telescopic unit 12 then drives the control box 7 to retract back to the initial position 20.

[0039] In some embodiments, the telescopic unit 12 may adopt, but is not limited to, a motor-driven telescopic structure, a pneumatic-driven telescopic structure, a hydraulic-driven telescopic structure, etc. The specific structure and principle of the above-mentioned telescopic structure for telescopic extension are well known to those skilled in the art and are not part of the core improvement of this utility model, so they will not be described in detail here.

[0040] In some embodiments, as described above, one end of the telescopic unit 12 is fixedly connected to the wall in the unloading area 1, and the other end is fixedly connected to the control box 7, thereby improving the stability of the telescopic unit 12 and ensuring that the control box 7 does not undergo vertical displacement during the telescopic unit 12's extension and retraction.

[0041] In the unloading system of this utility model, the distance sensor 15 includes, but is not limited to, ultrasonic sensors, laser sensors, radar sensors, etc.

[0042] In some embodiments, the control box 7 further includes a separator disposed between the alignment confirmation button 14 and the distance sensor 15 and the through-beam photoelectric sensor. See also Figure 2 As shown, the alignment confirmation button 14 and the unloading gate switch knob 13 are located on the upper part of the control box 7, while the transmitter 16 of the through-beam photoelectric sensor and the distance sensor 15 are located on the lower part of the control box 7. A separator is provided in the middle of the control box 7 to separate the alignment confirmation button 14 from the distance sensor 15 and the through-beam photoelectric sensor, thus preventing interference to the distance sensor 15 when the mixer truck driver operates the alignment confirmation button 14. The separator includes, but is not limited to, steel plates, stainless steel plates, iron plates, etc.

[0043] In some embodiments, the installation height of the distance sensor 15 and / or the transmitter 16 of the through-beam photoelectric sensor is not higher than the lower edge of the side window 19 of the mixer truck 6, so as to avoid the glass of the side window 19 affecting the detection results of the distance sensor 15 or the through-beam photoelectric sensor.

[0044] In some implementations, see Figure 2 As shown, the control box 7 also includes a dust cover 18 for protecting the alignment confirmation button 14. The dust cover 18 is located outside the alignment confirmation button 14 and covers the alignment confirmation button 14 and the unloading door switch knob 13. It is understood that the distance sensor 15 and the through-beam photoelectric sensor have an open design and are not covered by the dust cover 18 to prevent the dust cover 18 from interfering with the normal operation of the distance sensor 15 and the through-beam photoelectric sensor. In one embodiment, the top of the dust cover 18 is hinged to the top of the control box 7, and the dust cover 18 can be flipped upwards to open it, facilitating the operation of the buttons in the control box 7 by the mixer truck driver. The dust cover 18 can be made of acrylic material to prevent the alignment confirmation button 14 and the unloading door switch knob 13 from being contaminated by concrete, dust, etc., thus reducing their service life.

[0045] In addition, this utility model also provides a concrete mixing plant, including the above-mentioned concrete mixing plant unloading system.

[0046] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including the combination of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A concrete mixing plant unloading system, characterized in that, include: The unloading area (1) is provided with a material collection hopper (4) and a mixer truck (6) located below the material collection hopper (4). The mixer truck (6) is configured to be moved by the mixer truck driver so that the receiving hopper (5) of the mixer truck (6) is aligned with the material collection hopper (4). The material collection hopper (4) is used to connect to the mixing host (8) containing concrete to deliver concrete to the receiving hopper (5). Monitoring device (2), which is installed in the unloading area (1) and is used to monitor the alignment of the collecting hopper (4) and the receiving hopper (5) and the conveying status of concrete from the collecting hopper (4) to the receiving hopper (5); and, The display device is installed in the unloading area (1) and is connected to the monitoring device (2) to display the monitoring information of the monitoring device (2) to the mixer truck driver.

2. The concrete mixing plant unloading system according to claim 1, characterized in that, The display device includes a display screen (3) located in the unloading area (1), the display screen (3) being signal-connected to the monitoring device (2), and the display screen (3) being located in front of the driver of the mixer truck.

3. The concrete mixing plant unloading system according to claim 1, characterized in that, The unloading system includes a control device for the mixer truck driver to control the conveying state of the concrete from the hopper (4) to the receiving hopper (5).

4. The concrete mixing plant unloading system according to claim 3, characterized in that, The control device includes a control unit, which includes a control box (7) disposed in the unloading area (1), and the control box (7) includes an alignment confirmation button (14).

5. The concrete mixing plant unloading system according to claim 4, characterized in that, The control box (7) includes a discharge door switch knob (13), which is used to control the opening degree of the discharge door (9) of the mixing host (8).

6. The concrete mixing plant unloading system according to claim 4, characterized in that, The control device includes a telescopic unit (12) with one end fixed in the unloading area (1) and the other end connected to the control box (7). The control unit includes a distance sensor (15) for detecting the distance between the distance sensor (15) and the mixer truck (6). The telescopic unit (12) is configured to extend and reduce the distance between the control box (7) and the mixer truck (6) when the distance sensor (15) detects that the distance between the distance sensor (15) and the mixer truck (6) remains unchanged and the distance is greater than a preset distance.

7. The concrete mixing plant unloading system according to claim 6, characterized in that, The control unit includes a through-beam photoelectric sensor having a transmitter (16) and a receiver (17) disposed opposite to each other, the transmitter (16) or the receiver (17) being disposed close to the distance sensor (15), the through-beam photoelectric sensor being configured to activate the distance sensor (15) when the mixer truck (6) passes between the transmitter (16) and the receiver (17).

8. The concrete mixing plant unloading system according to claim 6, characterized in that, The distance sensor (15) is installed at a height no higher than the lower edge of the side window (19) of the mixer truck (6).

9. The concrete mixing plant unloading system according to any one of claims 4-8, characterized in that, The control box (7) also includes a dust cover (18) for protecting the alignment confirmation button (14).

10. A concrete mixing plant, characterized in that, Includes the concrete mixing plant unloading system according to any one of claims 1-9.

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