Concrete mixing plant

Abstract

The application relates to the field of engineering machinery and discloses a concrete mixing device, which comprises a hydraulic power unit, a discharge door driving assembly, a hydraulic lubricating device and a controller. The hydraulic lubricating device comprises a grease conveying pipeline, an on-off valve and a driving pipeline assembly. The grease conveying pipeline is connected to the bearing position of the discharge door of the concrete mixing device. The on-off valve is arranged on the grease conveying pipeline and is used for conducting or cutting off the grease conveying pipeline. The driving pipeline assembly is connected to the hydraulic power unit and is used for driving the on-off valve to open or close. The controller is configured to determine that the concrete mixing device is in a mixing function mode, determine that the concrete mixing device has completed discharging, control the discharge door driving assembly to drive the discharge door to close, and control the driving pipeline assembly to drive the on-off valve to open so that the lubricating grease lubricates the bearing position of the discharge door. The concrete mixing device can automatically lubricate the bearing position of the discharge door, which is favorable for reducing labor intensity and improving lubricating efficiency.

Description

Technical Field

[0001] This application belongs to the field of engineering machinery technology, and specifically relates to a concrete mixing equipment. Background Technology

[0002] Concrete mixing equipment is a machine that mixes cement, sand and gravel aggregates and water to produce concrete mixture. Because of its harsh working environment, the sealing devices at the end of the main shaft, the end of the drive shaft, or other parts must be effectively sealed and protected.

[0003] Current technology for lubricating unconventional lubrication points such as the discharge gate bearing of concrete mixing equipment relies on manual lubrication. In actual operation, due to the large number of lubrication points, their scattered distribution, and the difficulty in controlling the amount of grease used, manual observation of the lubrication points is required to check whether grease has been effectively added. In addition, to ensure the personal safety of operators, the concrete mixing equipment must be stopped when lubricating the discharge gate bearing and other locations. Therefore, the above methods have problems such as high labor intensity, long time consumption, easy omission of lubrication or untimely lubrication, and will also significantly affect the working efficiency and service life of concrete mixing equipment. Summary of the Invention

[0004] The purpose of this application is to provide a concrete mixing device with a simple structure that can automatically lubricate the bearing position of the discharge gate, which helps to reduce labor intensity and improve lubrication efficiency.

[0005] To achieve the above objectives, this application provides a concrete mixing device, which includes:

[0006] Hydraulic power unit;

[0007] The discharge gate drive assembly is connected to the hydraulic power unit and is used to drive the discharge gate of the concrete mixing plant to open or close.

[0008] The hydraulic lubrication device includes a grease delivery pipeline for conveying lubricating grease, a switching valve and a drive pipeline assembly. The grease delivery pipeline is connected to the bearing position of the discharge gate of the concrete mixing equipment. The switching valve is installed on the grease delivery pipeline and is used to open or close the grease delivery pipeline. The drive pipeline assembly is connected to a hydraulic power unit and is used to drive the switching valve to open or close.

[0009] The controller is configured as follows:

[0010] Ensure the concrete mixing equipment is in mixing mode;

[0011] Confirm that the concrete mixing equipment has completed unloading;

[0012] The unloading gate drive assembly controls the unloading gate to close.

[0013] The control drive pipeline assembly drives the switching valve to open, allowing grease to lubricate the unloading gate bearing position.

[0014] Placement.

[0015] In an embodiment of the present invention, the concrete mixing equipment is provided with a first discharge gate bearing position and a second discharge gate bearing position. The switching valve is provided with a first driving end, a second driving end, a first oil outlet end, and a second oil outlet end. The first oil outlet end is connected to the first discharge gate bearing position and opens after being driven by the first driving end. The second oil outlet end is connected to the second discharge gate bearing position and opens after being driven by the second driving end. The controller is further configured to:

[0016] After confirming that the unloading gate is closed, the control drive pipeline assembly alternately drives the first drive end and the second drive end so that the grease alternately lubricates the bearing positions of the first unloading gate and the bearing positions of the second unloading gate.

[0017] In an embodiment of the present invention, the switching valve is further provided with a third oil outlet connected to the lubrication position at the end of the mixing spindle of the concrete mixing equipment. The third oil outlet opens after being driven by the first driving end or the second driving end.

[0018] In an embodiment of the present invention, the controller is further configured to:

[0019] Determine the preset closing time of the unloading gate;

[0020] The control drive pipeline assembly alternately drives the first drive end or the second drive end of the switching valve.

[0021] In an embodiment of the present invention, the concrete mixing equipment further includes multiple overflow valves, all of which are disposed on the grease conveying pipeline and respectively near the bearing positions of the first discharge gate, the bearing positions of the second discharge gate, and the lubrication position at the end of the mixing main shaft; the controller is further configured to:

[0022] If the concrete mixing equipment is confirmed to be in mixing mode, determine the cumulative number of times the discharge gate is opened.

[0023] When the number of times the unloading gate has been opened reaches the first preset number and the unloading gate is in the closed state, the control drive pipeline assembly drives the switching valve to open.

[0024] Determine the cumulative number of times the hydraulic lubrication system performs its lubrication function;

[0025] If the cumulative number of times the hydraulic lubrication device performs the lubrication function reaches the second preset number, determine that any one of the multiple relief valves will overflow.

[0026] Control the drive pipeline assembly to stop driving the switching valve.

[0027] In an embodiment of the present invention, the concrete mixing equipment further includes an alarm module for issuing an alarm signal; the controller is further configured to:

[0028] If the cumulative number of times the hydraulic lubrication device performs the lubrication function reaches the second preset number, and multiple overflow valves do not overflow, then the cumulative number of times the hydraulic lubrication device performs the lubrication function reaches the third preset number, and the third preset number is greater than the second preset number.

[0029] It was confirmed that none of the multiple relief valves overflowed;

[0030] The concrete mixing equipment has been determined to be malfunctioning.

[0031] The alarm control module sends out an alarm signal.

[0032] In an embodiment of the present invention, the controller is further configured to:

[0033] If the cumulative number of times the hydraulic lubrication device performs the lubrication function is greater than the second preset number and less than the third preset number, then it is determined that any one of the multiple relief valves will overflow.

[0034] Determine that the hydraulic power unit is in an abnormal operating state;

[0035] Adjust the working pressure of the hydraulic power unit according to the cumulative number of times the hydraulic lubrication device performs the lubrication function, so that the hydraulic power unit can be restored to normal working condition.

[0036] In embodiments of the present invention, the hydraulic lubrication device further includes an operating handle for manually applying driving force to the first drive end or the second drive end.

[0037] In an embodiment of the present invention, the hydraulic lubrication device further includes a vent valve disposed on the grease delivery pipeline and used to discharge air from inside the grease delivery pipeline.

[0038] In embodiments of the present invention, the hydraulic lubrication device further includes a pressure regulating relief valve disposed on the grease delivery pipeline and used to regulate the pressure inside the grease delivery pipeline.

[0039] As can be seen from the above technical solution, the concrete mixing equipment includes a hydraulic power unit, a discharge gate drive assembly, a hydraulic lubrication device, and a controller. The hydraulic lubrication device includes a grease delivery pipeline, a switching valve, and a drive pipeline assembly. The grease delivery pipeline is connected to the bearing position of the discharge gate of the concrete mixing equipment. The switching valve is located on the grease delivery pipeline and is used to open or close the grease delivery pipeline. The drive pipeline assembly is connected to the hydraulic power unit and is used to drive the switching valve to open or close. Both the discharge gate drive assembly and the hydraulic lubrication device of the concrete mixing equipment are connected to the hydraulic power unit and are driven by the hydraulic power unit to perform their respective functions. The system is functional, simple in structure, low in cost, and stable and reliable. The controller is configured to: determine that the concrete mixing equipment is in the mixing function mode; determine that the concrete mixing equipment has completed unloading; control the unloading gate drive assembly to drive the unloading gate to close; and control the drive pipeline assembly to drive the switch valve to open, so as to lubricate the bearing position of the unloading gate with grease. It can automatically supply grease to lubricate the bearing position of the unloading gate without stopping the concrete mixing equipment, which reduces labor intensity, ensures the working efficiency of the concrete mixing equipment, avoids safety hazards, and has high and regular lubrication efficiency, which also helps to extend the service life of the concrete mixing equipment.

[0040] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0041] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0042] Figure 1 This is a schematic diagram of the structure of the concrete mixing equipment in an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the hydraulic lubrication device in an embodiment of the present invention;

[0044] Figure 3 This is a flowchart illustrating the main control process of the concrete mixing equipment in this embodiment of the invention.

[0045] Explanation of reference numerals in the attached figures

[0046] Detailed Implementation

[0047] The specific embodiments of this application 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 this application.

[0048] To achieve the above objectives, this application provides a concrete mixing device, such as... Figures 1-2 As shown, the concrete mixing equipment includes:

[0049] Hydraulic power unit 1;

[0050] The unloading gate drive assembly 2 is connected to the hydraulic power unit 1 and is used to drive the unloading gate of the concrete mixing equipment to open or close.

[0051] The hydraulic lubrication device 3 includes a grease delivery pipeline 301 for delivering lubricating grease, a switching valve and a drive pipeline assembly 302. The grease delivery pipeline 301 is connected to the bearing position of the discharge gate of the concrete mixing equipment. The switching valve is installed on the grease delivery pipeline 301 and is used to open or close the grease delivery pipeline 301. The drive pipeline assembly 302 is connected to the hydraulic power unit 1 and is used to drive the switching valve to open or close.

[0052] Controller, such as Figure 3 As shown, the controller is configured to perform the following steps:

[0053] Step S101: Determine that the concrete mixing equipment is in mixing function mode;

[0054] Step S102: Confirm that the concrete mixing equipment has completed unloading;

[0055] Step S103: Control the unloading gate drive assembly 2 to drive the unloading gate to close;

[0056] Step S104: Control the drive pipeline assembly 302 to open the drive switch valve to allow the grease to be released.

[0057] Lubrication point at the bearing location of the unloading gate.

[0058] Specifically, the concrete mixing equipment in this embodiment can be a twin-shaft concrete mixer and includes a mixing cylinder and a mixing mechanism. The mixing cylinder has a mixing chamber inside, and a feeding port and a discharging port are also formed on the mixing cylinder. The feeding port is located at the top of the mixing cylinder and is used to feed various types of materials (such as cement, sand and gravel aggregates, and water) into the mixing chamber. The mixing mechanism is rotatably arranged in the mixing chamber and is used to mix various materials in the mixing chamber. The discharging port is used to discharge the concrete formed after mixing. The discharge gate is detachably located at the location of the discharge port. The hydraulic lubrication device 3 also includes a grease tank 308 for storing lubricating grease. One end of the grease conveying pipeline 301 is connected to the grease tank 308, and the other end of the grease conveying pipeline 301 is connected to the bearing position of the discharge gate of the concrete mixing equipment. The bearing position of the discharge gate is a non-conventional lubrication position on the concrete mixing equipment.

[0059] The unloading gate drive assembly 2 includes a telescopic cylinder 201, a first hydraulic pipe 202, and a second hydraulic pipe 203. The telescopic end of the telescopic cylinder 201 is connected to the unloading gate drive. One end of the first hydraulic pipe 202 is connected to the first oil port of the telescopic cylinder 201, and the other end of the first hydraulic pipe 202 is connected to the first port of the hydraulic power unit 1 through a first solenoid valve 7. One end of the second hydraulic pipe 203 is connected to the second oil port of the telescopic cylinder 201, and the other end of the second hydraulic pipe 203 is connected to the second port of the hydraulic power unit 1 through the first solenoid valve 7. The concrete mixing equipment also includes a hydraulic oil tank for storing hydraulic oil. The hydraulic power unit 1 can be a hydraulic pump, which can draw hydraulic oil from the hydraulic oil tank and pump it to the first hydraulic pipe 202 or the second hydraulic pipe 203.

[0060] The first solenoid valve 7 is communicatively connected to the controller. The controller opens or closes the first solenoid valve 7, correspondingly connecting or disconnecting the first hydraulic pipe 202 and the second hydraulic pipe 203, thereby controlling the opening and closing or extension / retraction of the telescopic cylinder 201. The unloading gate opens or closes under the drive of the telescopic cylinder 201. If the controller controls the first solenoid valve 7 to open, the hydraulic pump pumps hydraulic oil into the first hydraulic pipe 202. The hydraulic oil enters the first oil chamber of the telescopic cylinder 201 from the first oil port. The hydraulic oil in the second oil chamber of the telescopic cylinder 201 flows out through the second oil port and enters the second hydraulic pipe 203. The telescopic end of the telescopic cylinder 201 extends and drives the unloading gate to open. If the controller controls the first solenoid valve 7 to perform a reversing operation, the hydraulic pump pumps hydraulic oil into the second hydraulic pipe 203. The hydraulic oil enters the second oil chamber of the telescopic cylinder 201 from the second oil port. The hydraulic oil in the first oil chamber of the telescopic cylinder 201 flows out through the first oil port and enters the first hydraulic pipe 202. The telescopic end of the telescopic cylinder 201 retracts and drives the unloading gate to close.

[0061] The drive pipeline assembly 302 includes a drive pipeline and a second solenoid valve 3023. The second solenoid valve 3023 is communicatively connected to the controller. The first end of the drive pipeline is connected to the hydraulic pump through the second solenoid valve 3023, and the second end of the drive pipeline is connected to the drive end of the switching valve. The controller can control the second solenoid valve 3023 to open or close, thereby realizing the conduction or cutoff control of the drive pipeline.

[0062] The concrete mixing equipment performs mixing operations in the mixing function mode. This mixing operation includes the following steps: starting the mixing mechanism, adding materials into the mixing chamber, mixing the materials, opening the discharge gate, discharging the mixed concrete from the discharge port, and closing the discharge gate after the concrete discharge is complete (i.e., the concrete mixing equipment has finished discharging). In this embodiment, the concrete mixing equipment also includes a mixing function button (which can be a physical button or a virtual touch button) that is communicatively connected to the controller. After the operator presses the mixing function button, the button sends a corresponding signal to the controller. Upon receiving the signal, the controller determines that the concrete mixing equipment is in the mixing function mode.

[0063] The concrete unloading process is continuously preset for a duration (e.g., 25 seconds). The concrete mixing equipment also includes a timer connected to the controller. The timer counts the unloading time of the concrete mixing equipment. When the accumulated time of the timer reaches the preset unloading duration, it sends a signal to the controller. Upon receiving the signal, the controller can determine that the unloading of the concrete mixing equipment is complete. Alternatively, the concrete mixing equipment also includes an image acquisition module for acquiring images of the mixing chamber and an image recognition module for recognizing the image information acquired by the image acquisition module. The image acquisition module sends the acquired images to the image recognition module, which recognizes the images and sends the recognition results to the controller. If the controller receives the recognition result from the image recognition module indicating that the unloading of the concrete mixing equipment is complete, it can determine that the unloading of the concrete mixing equipment is complete.

[0064] After the controller determines that the concrete mixing equipment has completed unloading, it opens the first solenoid valve 7 and controls its operation so that the hydraulic pump pumps hydraulic oil into the second hydraulic pipe 203, thereby causing the telescopic cylinder 201 to drive the unloading gate to close. After the unloading gate closes, the controller sends a control signal to the second solenoid valve 3023 so that the hydraulic pump can pump hydraulic oil into the drive pipeline, thereby causing the drive end of the switch valve to be subjected to a preset pressure and opening the grease delivery pipeline 301. The grease in the grease tank 308 can then flow through the grease delivery pipeline 301 to the bearing position of the unloading gate of the concrete mixing equipment and provide grease lubrication to the bearing position.

[0065] Existing technologies rely on manual lubrication of the discharge gate bearing (an unconventional lubrication point), which is labor-intensive, time-consuming, and prone to problems such as untimely lubrication and component damage. Furthermore, this method requires the equipment to be shut down, impacting the efficiency of the concrete mixing plant. In contrast, the concrete mixing plant in this embodiment automatically lubricates the discharge gate bearing while in mixing mode, reducing labor intensity, shortening lubrication time, and providing high and consistent lubrication efficiency (the lubrication pattern of the hydraulic lubrication device 3 is correlated with the closing pattern of the discharge gate). Moreover, this lubrication method better suits the actual operating conditions of the concrete mixing plant, preventing component damage due to untimely lubrication, ensuring the efficiency of the concrete mixing plant, and extending its service life.

[0066] In one embodiment of the present invention, the concrete mixing equipment is provided with a first discharge gate bearing position and a second discharge gate bearing position. The switching valve is provided with a first drive end 303, a second drive end 304, a first oil outlet end 305, and a second oil outlet end 306. The first oil outlet end 305 is connected to the first discharge gate bearing position and opens after the first drive end 303 is driven. The second oil outlet end 306 is connected to the second discharge gate bearing position and opens after the second drive end 304 is driven. The controller is further configured to perform the following steps:

[0067] Step S201: After confirming that the unloading gate is closed, control the drive pipeline assembly 302 to alternately drive the first drive end 303 and the second drive end 304 so that the grease alternately lubricates the bearing positions of the first unloading gate and the bearing positions of the second unloading gate.

[0068] Specifically, there are multiple drive lines, including a first drive line 3021 and a second drive line 3022. The first end of the first drive line 3021 and the first end of the second drive line 3022 are both connected to the hydraulic pump through a second solenoid valve 3023. The second end of the first drive line 3021 is connected to the first drive end 303 of the switching valve, and the second end of the second drive line 3022 is connected to the second drive end 304 of the switching valve. The controller controls the second solenoid valve 3023 to open or close, thereby realizing the conduction or cutoff control of the first drive line 3021 and the second drive line 3022.

[0069] Furthermore, in this embodiment, the controller sends a control signal to the second solenoid valve 3023. After receiving the control signal, the second solenoid valve 3023 opens or closes the first drive line 3021 and the second drive line 3022, so that the hydraulic pump can alternately input hydraulic oil into the first drive line 3021 and the second drive line 3022. That is, when the hydraulic pump pumps hydraulic oil into the first drive line 3021, the hydraulic oil can reach the second end of the first drive line 3021, while the hydraulic oil in the second drive line 3022 flows out. At this time, the first drive end 303 of the switching valve can be subjected to a preset pressure; conversely, when the hydraulic pump pumps hydraulic oil into the second drive line 302 ... When hydraulic oil is pumped in the pipeline 3022, the hydraulic oil can reach the second end of the second drive pipeline 3022, while the hydraulic oil in the first drive pipeline 3021 flows out. At this time, the second drive end 304 of the switch valve can be subjected to a preset pressure. Therefore, the first drive end 303 and the second drive end 304 of the switch valve are alternately subjected to the preset pressure, and the first oil outlet end 305 and the second oil outlet end 306 of the switch valve are alternately opened. The lubricating grease in the grease tank 308 flows alternately to the first unloading gate bearing position and the second unloading gate bearing position through the grease delivery pipeline 301, thereby realizing intermittent lubrication of the first unloading gate bearing position and the second unloading gate bearing position.

[0070] In one embodiment of the present invention, the switching valve is further provided with a third oil outlet 307 connected to the lubrication position at the end of the mixing spindle of the concrete mixing equipment. The third oil outlet 307 opens after being driven by the first driving end 303 or the second driving end 304.

[0071] Specifically, in this embodiment, when either the first drive end 303 or the second drive end 304 is subjected to a preset pressure, the third oil outlet end 307 can be opened, and the grease in the grease tank 308 can flow to the lubrication position at the end of the stirring spindle through the grease delivery pipeline 301, thereby making the lubrication position at the end of the stirring spindle subject to progressive circulating lubrication.

[0072] Furthermore, there are multiple lubrication points at the end of the stirring spindle, including multiple floating seal ring positions at the end of the stirring spindle (in this embodiment, the number of floating seal ring positions at the end of the stirring spindle is preferably four) and multiple support bearing positions at the end of the stirring spindle (in this embodiment, the number of support bearing positions at the end of the stirring spindle is preferably four). The hydraulic lubrication device 3 also includes a distributor 8 disposed on the grease delivery pipeline 301 and located downstream of the switching valve. The distributor 8 includes an inlet end and multiple outlet ends. The grease delivery pipeline 301 includes a first pipe section and multiple second pipe sections. The two ends of the first pipe section are respectively connected to the grease tank 308 and the oil inlet end of the switching valve. The multiple second pipe sections include a first distribution pipe section, a second distribution pipe section, and a third distribution pipe section. The two ends of the first distribution pipe section are respectively connected to the first oil outlet end 305 of the switching valve and the bearing position of the first discharge gate, so as to supply grease lubrication to the bearing position of the first discharge gate. The two ends of the second distribution pipe section are respectively connected to the second oil outlet end 306 of the switching valve and the bearing position of the second discharge gate, so as to supply grease lubrication to the bearing position of the second discharge gate. The third distribution pipe section includes a first branch... The first section and multiple second sections are connected to the third oil outlet 307 of the switch valve and the inlet end of the distributor 8 at both ends, respectively. Multiple second sections are connected to multiple outlet ends of the distributor 8 one by one. The second ends of a number of second sections are connected to multiple floating seal ring positions at the ends of the mixing spindles (which are non-standard lubrication positions) one by one. The second ends of a number of second sections are connected to multiple support bearing positions at the ends of the mixing spindles (which are non-standard lubrication positions) one by one. This allows the hydraulic lubrication device 3 to simultaneously supply grease lubrication to multiple floating seal ring positions at the ends of the mixing spindles and multiple support bearing positions at the ends of the mixing spindles on the concrete mixing equipment, thereby improving the efficiency of grease lubrication of the hydraulic lubrication device 3 and expanding the application range of the hydraulic lubrication device 3.

[0073] In this embodiment, the hydraulic lubrication device 3 of the concrete mixing equipment can automatically lubricate multiple unconventional lubrication points, such as the bearing positions of the first discharge gate, the bearing positions of the second discharge gate, and the lubrication position at the end of the mixing main shaft, which are numerous and located in a dispersed manner. This solves the problem that manual lubrication is difficult and prone to omission in the existing lubrication methods.

[0074] In one embodiment of the invention, the controller is further configured to perform the following steps:

[0075] Step S301: Determine the preset closing time of the unloading gate;

[0076] Step S302: Control the drive pipeline assembly 302 to alternately drive the first drive end 303 or the second drive end 304 of the switching valve.

[0077] Specifically, after the concrete mixing equipment finishes unloading, the controller closes the second solenoid valve 3023 and opens the first solenoid valve 7, so that the hydraulic pump can only pump hydraulic oil into the first hydraulic pipe 202 or the second hydraulic pipe 203, to ensure the action accuracy (i.e., extension accuracy) of the telescopic cylinder 201, which in turn helps to ensure the accuracy of the unloading gate closing. After the unloading gate closes for a preset time (e.g., 5s or 10s), the controller closes the first solenoid valve 7 and opens the second solenoid valve 3023, so that the hydraulic pump can only pump hydraulic oil into the first drive pipe 3021 or the second drive pipe 3022, to ensure that the first drive end 303 or the second drive end 304 of the switching valve is subjected to a preset pressure, thereby ensuring that the hydraulic lubrication device 3 can stably supply grease lubrication to the lubrication position at the end of the mixing spindle and the lubrication position of the unloading gate bearing (i.e., the first unloading gate bearing position or the second unloading gate bearing position), which helps to improve the stability and reliability of the concrete mixing equipment.

[0078] In one embodiment of the present invention, the concrete mixing equipment further includes a plurality of overflow valves, all of which are disposed on the grease conveying pipeline 301 and respectively near the bearing positions of the first discharge gate, the bearing positions of the second discharge gate, and the lubrication position at the end of the mixing main shaft; the controller is further configured to perform the following steps:

[0079] Step S401: If the concrete mixing equipment is confirmed to be in mixing mode, determine the cumulative number of times the discharge gate is opened;

[0080] Step S402: When it is determined that the cumulative number of times the unloading gate has been opened has reached the first preset number and the unloading gate is in the closed state, the drive pipeline assembly 302 is controlled to drive the switching valve to open;

[0081] Step S403: Determine the cumulative number of times the hydraulic lubrication device 3 performs the lubrication function;

[0082] Step S404: If the cumulative number of times the hydraulic lubrication device 3 performs the lubrication function reaches the second preset number, determine that any one of the multiple relief valves overflows;

[0083] Step S405: Control drive pipeline assembly 302 to stop driving the switching valve.

[0084] Since the bearing positions of the first discharge gate, the second discharge gate, and the lubrication point at the end of the mixing shaft are all unconventional lubrication points, it is unnecessary to lubricate these points every time the concrete mixing equipment performs a mixing operation. Therefore, to make these unconventional lubrication points more aligned with actual lubrication needs, lubrication is performed only after the concrete mixing equipment performs a first preset number of mixing operations (in this embodiment, the discharge gate opens once every first preset number of mixing operations).

[0085] Specifically, in this embodiment, the controller controls the first solenoid valve 7 to drive the telescopic cylinder 201 to open the discharge gate. Therefore, the cumulative number of times the controller controls the first solenoid valve 7 can be used to determine the cumulative number of times the discharge gate has been opened. Then, the cumulative number is compared with a first preset number (e.g., 5 times). If the cumulative number is greater than or equal to the first preset number, it can be determined that the cumulative number has reached the first preset number. Alternatively, in this embodiment, the concrete mixing equipment also includes an opening / closing detector for detecting the opening / closing state of the discharge gate and communicating with the controller. After the opening / closing detector detects that the discharge gate is open, it records the result and sends the recorded result to the controller. After receiving the recorded result, the controller compares it with the first preset number. If the cumulative number is greater than or equal to the first preset number, it can be determined that the cumulative number has reached the first preset number.

[0086] Furthermore, since the hydraulic lubrication device 3 performs a lubrication function once for each preset number of mixing operations performed by the concrete mixing equipment, the controller can determine the cumulative number of times the hydraulic lubrication device 3 performs the lubrication function and the cumulative number of times the lubrication position at the end of the mixing shaft is lubricated based on the cumulative number of times the discharge gate is opened.

[0087] The grease delivery pipeline 301 has multiple pipeline ends, which are connected to multiple lubrication positions. Multiple overflow valves are correspondingly installed at the multiple pipeline ends. If the hydraulic lubrication device 3 performs the lubrication function a total of two preset times (e.g., 5 times), and any one of the multiple overflow valves overflows, it indicates that there is too much grease at the corresponding lubrication position and the grease supply is saturated. To avoid wasting grease, the controller stops the second solenoid valve 3023, the hydraulic pump stops pumping oil to the first drive pipeline 3021 or the second drive pipeline 3022, and the oil outlets of the switching valves are closed to stop grease supply to multiple non-standard lubrication positions such as the first unloading gate bearing position, the second unloading gate bearing position, and the lubrication position at the end of the stirring spindle.

[0088] In one embodiment of the present invention, the concrete mixing equipment further includes an alarm module for issuing an alarm signal; the controller is further configured to perform the following steps:

[0089] Step S501: If it is determined that the hydraulic lubrication device 3 has performed the lubrication function a total of a second preset number of times, and multiple overflow valves have not overflowed, then it is determined that the hydraulic lubrication device 3 has performed the lubrication function a total of a third preset number of times, and the third preset number of times is greater than the second preset number of times.

[0090] Step S502: Confirm that none of the multiple relief valves have overflowed;

[0091] Step S503: Determine that the concrete mixing equipment has malfunctioned;

[0092] Step S504: Control the alarm module to send an alarm signal.

[0093] Specifically, when the controller determines that the hydraulic lubrication device 3 has cumulatively performed lubrication functions a third preset number of times (e.g., 10 times), and none of the multiple overflow valves have overflowed, it indicates that the concrete mixing equipment has malfunctioned (e.g., a leak in the grease delivery pipeline 301). The controller then controls the alarm module to issue an alarm signal (e.g., an audible "Concrete mixing equipment has malfunctioned" sound or a red light), so that the operator can quickly notice the malfunction and repair it, allowing the malfunction to be resolved as soon as possible. In this embodiment, the alarm module enables the concrete mixing equipment to automatically detect malfunctions occurring at various non-standard lubrication points, improving automation and reliability.

[0094] In one embodiment of the invention, the controller is further configured to perform the following steps:

[0095] Step S601: If it is determined that the cumulative number of times the hydraulic lubrication device 3 performs the lubrication function is greater than the second preset number and less than the third preset number, determine that any one of the multiple overflow valves overflows;

[0096] Step S602: Determine that the hydraulic power unit 1 is in an abnormal working state;

[0097] Step S603: Adjust the working pressure of the hydraulic power unit 1 according to the cumulative number of times the hydraulic lubrication device 3 performs the lubrication function, so that the hydraulic power unit 1 returns to normal working condition.

[0098] Specifically, if the controller determines that the hydraulic lubrication device 3 has cumulatively performed lubrication functions between the second and third preset counts (e.g., 7 times), and any one of the multiple overflow valves overflows, it indicates that the concrete mixing equipment has not malfunctioned (e.g., the grease delivery pipeline 301 has not leaked), but the hydraulic power unit 1 is in an abnormal working state (in this embodiment, an abnormal working state refers to the state where the amount of hydraulic oil drawn from the hydraulic oil tank by the hydraulic power unit 1 per unit time is less than the preset drawing amount, or, the state where the hydraulic power unit 1 cannot draw oil normally). At this time, the controller needs to determine the cumulative lubrication functions performed by the hydraulic lubrication device 3. The adjustment ratio of the working pressure of the hydraulic power unit 1 is determined by the number of times the hydraulic lubrication device 3 performs the lubrication function. Then, the working pressure of the hydraulic power unit 1 is adjusted according to the above adjustment ratio k (in this embodiment, the more times the hydraulic lubrication device 3 performs the lubrication function, the larger the adjustment ratio k). (In this embodiment, the working pressure of the hydraulic power unit 1 can be adjusted by changing the parameters of the working pressure of the hydraulic power unit 1) so that the hydraulic power unit 1 can return to the normal working state. The hydraulic power unit 1 can normally draw hydraulic oil from the hydraulic oil tank and can alternately pump the hydraulic oil to the first drive line 3021 or the second drive line 3022, thereby enabling the hydraulic lubrication device to normally perform the grease supply lubrication function.

[0099] In one embodiment of the present invention, the hydraulic lubrication device 3 further includes an operating handle 4 for manually applying driving force to the first driving end 303 or the second driving end 304. When the operator applies force to the operating handle 4 in a first direction, the first driving end 303 of the switching valve is driven to open the first oil outlet end 305 and the third oil outlet end 307, and the bearing position of the first discharge gate and the lubrication position at the end of the stirring shaft are supplied with grease. When the operator applies force to the operating handle 4 in a second direction (the second direction is opposite to the first direction), the second driving end 304 of the switching valve is driven to open the second oil outlet end 306 and the third oil outlet end 307, and the bearing position of the second discharge gate and the lubrication position at the end of the stirring shaft are supplied with grease. The operation handle 4 allows the operator to still supply grease lubrication to the lubrication position at the end of the mixing spindle and the unloading gate bearing position (i.e., the first unloading gate bearing position or the second unloading gate bearing position) through the hydraulic lubrication device 3 when the concrete mixing equipment is stopped, when the hydraulic power unit 1 malfunctions, or when it is necessary to increase the amount of lubricating grease.

[0100] In one embodiment of the present invention, the hydraulic lubrication device 3 further includes an air vent valve 5 disposed on the grease delivery pipeline 301 and used to discharge air from inside the grease delivery pipeline 301. Specifically, when the grease is exhausted and air is drawn into the grease delivery pipeline 301, or when grease cannot be delivered from the grease delivery pipeline 301 for a long time due to other reasons, the operator can adjust the air vent valve 5 to discharge the air from inside the grease delivery pipeline 301 so that the hydraulic lubrication device 3 can perform the grease supply lubrication function normally; after the air inside the grease delivery pipeline 301 has been discharged, the operator then locks the air vent valve 5.

[0101] In one embodiment of the present invention, the hydraulic lubrication device 3 further includes a pressure regulating relief valve 6 disposed on the grease delivery pipeline 301 and used to regulate the pressure inside the grease delivery pipeline 301. Specifically, the pressure regulating relief valve 6 is communicatively connected to the controller; the grease delivery pipeline 301 is also provided with a pressure sensor for detecting the pressure inside the grease delivery pipeline 301 and communicatively connected to the controller. After the pressure sensor detects the pressure, it sends the pressure value to the controller. The controller compares the pressure value with a preset pressure value. If the pressure value is greater than the preset pressure value, it indicates that the pressure inside the grease delivery pipeline 301 is too high. At this time, the controller controls the pressure regulating relief valve 6 to regulate the pressure inside the grease delivery pipeline 301 so that the pressure inside the grease delivery pipeline 301 is within a suitable range, so as to ensure that the hydraulic lubrication device 3 can normally perform the grease supply lubrication function.

[0102] In one embodiment of the present invention, the concrete mixing equipment further includes an electric lubrication device 9 for supplying grease lubrication to the shaft end sealing position; the shaft end sealing position refers to the movement gap position between the main shaft of the mixing mechanism and the support part of the mixing cylinder, which is a conventional lubrication position. The hydraulic lubrication device 3 and the electric lubrication device 9 of the concrete mixing equipment cooperate with each other to achieve lubrication of multiple conventional lubrication positions and multiple unconventional lubrication positions. The lubrication efficiency is high and it is not easy to miss any parts, and the parts are not easily damaged, which helps to extend the service life of the concrete mixing equipment.

[0103] In the description of this application, 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0104] In this application, unless otherwise expressly 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 components; 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0105] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., 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 application. 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.

[0106] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A concrete mixing plant, characterized in that The concrete mixing equipment is provided with a first discharge gate bearing position and a second discharge gate bearing position and comprises: a hydraulic power unit (1); a discharge gate driving assembly (2) connected with the hydraulic power unit (1) and used for driving the discharge gate of the concrete mixing equipment to open or close; a hydraulic lubricating device (3) comprising a grease conveying pipeline (301) used for conveying lubricating grease, a switch valve and a driving pipeline assembly (302), the grease conveying pipeline (301) being connected with the discharge gate bearing position of the concrete mixing equipment, the switch valve being arranged on the grease conveying pipeline (301) and used for conducting or cutting off the grease conveying pipeline (301), the driving pipeline assembly (302) being connected with the hydraulic power unit (1) and used for driving the switch valve to open or close, the switch valve being provided with a first driving end (303), a second driving end (304), a first oil outlet end (305) and a second oil outlet end (306), the first oil outlet end (305) being connected with the first discharge gate bearing position and being opened after the first driving end (303) is driven, the second oil outlet end (306) being connected with the second discharge gate bearing position and being opened after the second driving end (304) is driven; a controller configured to: determine that the concrete mixing equipment is in a mixing function mode; determine that the concrete mixing equipment is finished with discharging; control the discharge gate driving assembly (2) to drive the discharge gate to close; after determining that the discharge gate is closed, control the driving pipeline assembly (302) to alternately drive the first driving end and the second driving end (304), so that the lubricating grease alternately lubricates the first discharge gate bearing position, the second discharge gate bearing position and a mixing spindle end lubricating position of the concrete mixing equipment. The switch valve is further provided with a third oil outlet end (307) connected with the mixing spindle end lubricating position of the concrete mixing equipment, the third oil outlet end (307) being opened after the first driving end (303) or the second driving end (304) is driven.

2. Concrete mixing plant according to claim 1, characterized in that The controller is further configured to:

3. The concrete mixing plant of claim 1, wherein determine that the discharge gate is closed for a preset time; control the driving pipeline assembly (302) to alternately drive the first driving end (303) or the second driving end (304) of the switch valve. The concrete mixing equipment further comprises a plurality of overflow valves, the plurality of overflow valves are arranged on the grease conveying pipeline (301) and are respectively close to the first discharge gate bearing position, the second discharge gate bearing position and the mixing spindle end lubricating position; the controller is further configured to:

4. The concrete mixing apparatus of claim 2, wherein, determine the number of times that the discharge gate is opened cumulatively under the condition that the concrete mixing equipment is in the mixing function mode; control the driving pipeline assembly (302) to drive the switch valve to open under the condition that the number of times that the discharge gate is opened cumulatively reaches a first preset number and the discharge gate is in a closed state; determine the number of times that the hydraulic lubricating device (3) performs a lubricating function cumulatively; ​ In a case where it is determined that the number of times the liquid-driven lubricating device (3) accumulatively performs the lubricating function reaches a second preset number of times, it is determined that any one of the plurality of overflow valves is in overflow. The controller controls the driving pipeline assembly (302) to stop driving the on-off valve.

5. Concrete mixing plant according to claim 4, characterized in that The concrete mixing equipment further comprises an alarm module configured to send an alarm signal; and the controller is further configured to: In a case where it is determined that the number of times the liquid-driven lubricating device (3) accumulatively performs the lubricating function reaches the second preset number of times and none of the plurality of overflow valves is in overflow, it is determined that the number of times the liquid-driven lubricating device (3) accumulatively performs the lubricating function reaches a third preset number of times, the third preset number of times being greater than the second preset number of times. It is determined that none of the plurality of overflow valves is in overflow. It is determined that the concrete mixing equipment is in failure. The controller controls the alarm module to send the alarm signal.

6. The concrete mixing plant of claim 5, wherein The controller is further configured to: In a case where it is determined that the number of times the liquid-driven lubricating device (3) accumulatively performs the lubricating function is greater than the second preset number of times and less than the third preset number of times, it is determined that any one of the plurality of overflow valves is in overflow. It is determined that the hydraulic power unit (1) is in an abnormal working state. The working pressure of the hydraulic power unit (1) is adjusted according to the number of times the liquid-driven lubricating device (3) accumulatively performs the lubricating function, so as to restore the hydraulic power unit (1) to a normal working state.

7. The concrete mixing apparatus of claim 1, wherein, The liquid-driven lubricating device (3) further comprises an operation handle (4) configured to manually apply driving force to the first driving end (303) or the second driving end (304).

8. Concrete mixing plant according to any of claims 1-7, characterized in that The liquid-driven lubricating device (3) further comprises an air discharge valve (5) arranged on the grease delivery pipeline (301) and configured to discharge air inside the grease delivery pipeline (301).

9. Concrete mixing plant according to any of claims 1-7, characterized in that The liquid-driven lubricating device (3) further comprises a pressure regulating overflow valve (6) arranged on the grease delivery pipeline (301) and configured to regulate the pressure inside the grease delivery pipeline (301).

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