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 connected with the hydraulic power unit and used for driving a discharge door of the concrete mixing device to open or close, and a lubricating device comprising a grease conveying pipeline used for conveying lubricating grease, an on-off valve and a driving pipeline assembly, the grease conveying pipeline being connected with a shaft end sealing position of the concrete mixing device, the on-off valve being arranged on the grease conveying pipeline and used for conducting or cutting off the grease conveying pipeline, and the driving pipeline assembly being connected with the hydraulic power unit and used for driving the on-off valve to open or close. The concrete mixing device has the advantages of simple structure, low cost and the ability to avoid the waste of lubricating grease caused by continuous grease supply.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, and particularly relates to a concrete mixing device. BACKGROUND

[0002] The concrete mixing device is a machine for mixing cement, sand and gravel aggregates and water into concrete mixture, which is provided with a mixing main shaft and a mixing cylinder. In the working state, a movement gap will appear at the supporting part of the mixing main shaft and the mixing cylinder. If the sealing is not in place, the concrete will seep out of the mixing cylinder along this part, causing the problems of oil and slurry leakage at the shaft end, which directly affects the working performance of the concrete mixer.

[0003] In the prior art, an electric centralized lubrication system is generally used to solve the above problems. The grease is injected into the gap between the shaft end part and the relative rotating part of the concrete mixer by the electric lubricating pump, and the grease filled in the gap is used to isolate the external environment to prevent the invasion of concrete slurry. However, the electric centralized lubrication system has a high cost and is generally used in a continuous oil supply environment. When the electric centralized lubrication system performs periodic intermittent oil supply, the motor needs to be frequently turned on, which will seriously affect the service life of the motor. In addition, the electric lubricating pump of the electric centralized lubrication system is a fixed displacement pump, and the oil output cannot be adjusted according to the working conditions. Moreover, as the plunger rod wears and the plunger spring stiffness decreases, the oil output of the electric lubricating pump will become less and less. SUMMARY

[0004] The purpose of the present application is to provide a concrete mixing device which has the advantages of simple structure, low cost and can avoid the waste of grease caused by continuous grease supply.

[0005] In order to achieve the above purpose, the present application provides a concrete mixing device, which comprises:

[0006] a hydraulic power unit;

[0007] a discharge door driving assembly connected with the hydraulic power unit and used for driving the discharge door of the concrete mixing device to open or close;

[0008] a lubricating device comprising a grease conveying pipeline for conveying grease, an on-off valve and a driving pipeline assembly, the grease conveying pipeline being connected at a shaft end sealing position of the concrete mixing device, the on-off valve being arranged on the grease conveying pipeline and used for conducting or cutting off the grease conveying pipeline, and the driving pipeline assembly being connected with the hydraulic power unit and used for driving the on-off valve to open or close.

[0009] In the embodiment of the present application, the concrete mixing device further comprises a controller configured to:

[0010] determine that the concrete mixing device is in a mixing function mode;

[0011] determine that the concrete mixing plant is unloaded;

[0012] control the discharge door driving assembly to drive the discharge door to close;

[0013] control the driving pipeline assembly to drive the on-off valve to open, so that the lubricating grease lubricates the shaft end sealing position.

[0014] In an embodiment of the present application, the controller is further configured to:

[0015] determine that the discharge door is closed for a preset time;

[0016] control the driving pipeline assembly to drive the on-off valve to open, so that the lubricating grease lubricates the shaft end sealing position.

[0017] In an embodiment of the present application, the concrete mixing plant further comprises a flow sensor for detecting the flow of the lubricating grease flowing to the shaft end sealing position; the controller is further configured to:

[0018] acquire the flow;

[0019] determine that the flow is within a preset flow range;

[0020] control the driving pipeline assembly to increase the number of times of driving the on-off valve to open within a preset period of time.

[0021] In an embodiment of the present application, the concrete mixing plant further comprises a flow sensor for detecting the flow of the lubricating grease flowing to the shaft end sealing position; the controller is further configured to:

[0022] acquire the flow;

[0023] determine that the flow is within a preset flow range;

[0024] increase the displacement of the hydraulic power unit to increase the opening degree of the on-off valve in the open state.

[0025] In an embodiment of the present application, the controller is further configured to:

[0026] determine that the flow is less than or equal to a preset flow threshold;

[0027] determine that the hydraulic power unit is in an abnormal working state;

[0028] adjust the working pressure of the hydraulic power unit to restore the hydraulic power unit to a normal working state.

[0029] In an embodiment of the present application, the concrete mixing plant further comprises a first alarm module for issuing a first alarm signal of an abnormal situation of the concrete mixing plant; the controller is further configured to:

[0030] In a case that the flow rate is within a preset flow rate range or the flow rate is less than a preset flow rate threshold, it is determined that the abnormal situation of the concrete mixing plant occurs.

[0031] The first alarm module is controlled to send the first alarm signal.

[0032] In the embodiment of the present application, the concrete mixing plant further comprises a second alarm module for sending a second alarm signal of a failure of the concrete mixing plant; and the controller is further configured to perform the following steps:

[0033] The number of times that the first alarm module sends the first alarm signal is accumulated.

[0034] It is determined that the number of times exceeds a preset number of times.

[0035] It is determined that the concrete mixing plant fails.

[0036] The second alarm module is controlled to send the second alarm signal.

[0037] In the embodiment of the present application, the lubricating device further comprises an operation handle for manually driving the on-off valve to open or close.

[0038] In the embodiment of the present application, the lubricating device further comprises:

[0039] A gas discharge valve is arranged on the grease delivery pipeline and used for discharging air inside the grease delivery pipeline;

[0040] A pressure regulating overflow valve is arranged on the grease delivery pipeline and used for regulating the pressure inside the grease delivery pipeline.

[0041] According to the above technical solution, the concrete mixing plant comprises a hydraulic power unit, a discharge door driving assembly and a lubricating device, the lubricating device comprises a grease delivery pipeline, an on-off valve and a driving pipeline assembly, the grease delivery pipeline is connected to a shaft end sealing position of the concrete mixing plant, the on-off valve is arranged on the grease delivery pipeline and used for conducting or cutting off the grease delivery pipeline, and the driving pipeline assembly is connected to the hydraulic power unit and used for driving the on-off valve to open or close. The discharge door driving assembly and the lubricating device of the concrete mixing plant are connected to the hydraulic power unit and driven by the hydraulic power unit to perform respective functions. Compared with the electric centralized lubricating system in the prior art, the concrete mixing plant has simple structure, low cost, stability and reliability, and is not prone to the situations that key components are easily damaged and the lubricating effect becomes worse with the increase of use time.

[0042] Other features and advantages of the embodiments of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings are included to provide a further understanding of embodiments of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain embodiments of the application, but are not intended to limit the present application in any manner. For purposes of explanation and nontimitation, specific structures are set forth in the accompanying drawings and are described in the claims. It is understood that the foregoing is a detailed description of the present application and is not intended to limit the broad aspects of the present application to what is set forth in the detailed description. Further, the purposes served by the various elements of the application will become apparent from context as this description proceeds in connection with the accompanying drawings.

[0044] Figure 1 Fig. 1 is a structural schematic diagram of a concrete mixing device in an embodiment of the present application;

[0045] Figure 2 Fig. 2 is a structural schematic diagram of a lubricating device in an embodiment of the present application;

[0046] Figure 3 Fig. 3 is a main flow schematic diagram of the concrete mixing device in an embodiment of the present application.

[0047] Legend of Reference Signs

[0048] DETAILED DESCRIPTION

[0049] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to explain and illustrate the present application, and are not intended to limit the present application.

[0050] An embodiment of the present application provides a new type of concrete mixing device, as shown in Fig. 1, which comprises: Figures 1-2 a hydraulic power unit 1;

[0051] a hydraulic power unit 1;

[0052] a hydraulic power unit 1;

[0053] a lubricating device 3, which comprises a grease conveying pipeline 302, a switch valve and a driving pipeline assembly 303, the grease conveying pipeline 302 is connected to a shaft end sealing position of the concrete mixing device, the switch valve is arranged on the grease conveying pipeline 302 and is used to open or close the grease conveying pipeline 302, and the driving pipeline assembly 303 is connected to the hydraulic power unit 1 and is used to drive the switch valve to open or close.

[0054] Specifically, the concrete mixing device in the embodiment can be a double-horizontal-shaft concrete mixer and comprises a mixing drum and a mixing mechanism. The mixing drum has a mixing cavity formed in the inside thereof, and a feeding opening and a discharging opening are formed on the mixing drum. The feeding opening is arranged at the top of the mixing drum and is used for feeding various types of materials (such as cement, sand and gravel aggregates, and water) into the mixing cavity. The mixing mechanism is rotatably arranged in the mixing cavity and is used for mixing the various types of materials in the mixing cavity. The discharging opening is used for discharging the concrete formed after mixing. A discharge door is arranged at the position of the discharging opening in an openable and closable manner. The lubricating device 3 further comprises a grease tank 301 for storing lubricating grease. One end of a grease delivery pipeline 302 is connected to the grease tank 301, and the other end of the grease delivery pipeline 302 is connected to the shaft end sealing position of the concrete mixing device. In the embodiment, the shaft end sealing position refers to the movement gap position between the main shaft of the mixing mechanism and the supporting part of the mixing drum.

[0055] The discharge door driving assembly 2 comprises a telescopic oil cylinder 201, a first hydraulic pipe 202, and a second hydraulic pipe 203. The telescopic end of the telescopic oil cylinder 201 is drivingly connected to the discharge door. One end of the first hydraulic pipe 202 is connected to the first oil port of the telescopic oil 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 the first electromagnetic valve 4. One end of the second hydraulic pipe 203 is connected to the second oil port of the telescopic oil 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 electromagnetic valve 4. The concrete mixing device further comprises a hydraulic oil tank for storing hydraulic oil. The hydraulic power unit 1 can be a hydraulic pump which can suck the hydraulic oil from the hydraulic oil tank and pump the hydraulic oil to the first hydraulic pipe 202 or the second hydraulic pipe 203.

[0056] The concrete mixing device further comprises a controller and the first electromagnetic valve 4 which is in communication connection with the controller. The controller opens or closes the first electromagnetic valve 4, which can correspondingly turn on or turn off the first hydraulic pipe 202 and the second hydraulic pipe 203, so as to realize the start-stop control or telescopic control of the telescopic oil cylinder 201, and the discharge door is opened or closed under the driving of the telescopic oil cylinder 201. If the controller controls the first electromagnetic valve 4 to be opened, the hydraulic pump pumps the hydraulic oil to the first hydraulic pipe 202, the hydraulic oil enters the first oil cavity of the telescopic oil cylinder 201 from the first oil port, the hydraulic oil in the second oil cavity of the telescopic oil cylinder 201 flows out from the second oil port and enters the second hydraulic pipe 203, and the telescopic end of the telescopic oil cylinder 201 extends and drives the discharge door to be opened. If the controller controls the first electromagnetic valve 4 to perform a reversing operation, the hydraulic pump pumps the hydraulic oil to the second hydraulic pipe 203, the hydraulic oil enters the second oil cavity of the telescopic oil cylinder 201 from the second oil port, the hydraulic oil in the first oil cavity of the telescopic oil cylinder 201 flows out from the first oil port and enters the first hydraulic pipe 202, and the telescopic end of the telescopic oil cylinder 201 retracts and drives the discharge door to be closed.

[0057] The driving pipeline assembly 303 comprises a first driving pipeline 3031, a second driving pipeline 3032 and a second electromagnetic valve 3033, the second electromagnetic valve 3033 is in communication connection with the controller, the first end of the first driving pipeline 3031 and the first end of the second driving pipeline 3032 are both connected with the hydraulic pump through the second electromagnetic valve 3033, the second end of the first driving pipeline 3031 is connected with the first driving end 3034 of the switch valve, the second end of the second driving pipeline 3032 is connected with the second driving end 3035 of the switch valve, the controller can control the second electromagnetic valve 3033 to open or close, thereby realizing the on or off control of the first driving pipeline 3031 and the second driving pipeline 3032;

[0058] Further, in the embodiment, the controller sends a control signal to the second electromagnetic valve 3033, and the second electromagnetic valve 3033 is turned on or off the first driving pipeline 3031 and the second driving pipeline 3032 after receiving the control signal, so that the hydraulic pump can alternately input hydraulic oil to the first driving pipeline 3031 and the second driving pipeline 3032, that is, when the hydraulic pump pumps hydraulic oil into the first driving pipeline 3031, the hydraulic oil can reach the second end of the first driving pipeline 3031, and the hydraulic oil in the second driving pipeline 3032 flows out, at this time the first driving end 3034 of the switch valve can be subjected to a preset pressure; on the contrary, when the hydraulic pump pumps hydraulic oil into the second driving pipeline 3032, the hydraulic oil can reach the second end of the second driving pipeline 3032, and the hydraulic oil in the first driving pipeline 3031 flows out, at this time the second driving end 3035 of the switch valve can be subjected to a preset pressure, so that the first driving end 3034 and the second driving end 3035 of the switch valve are alternately subjected to a preset pressure and continuously turned on the grease delivery pipeline 302, so that the lubricating grease in the grease tank 301 flows to the shaft end sealing position of the concrete mixing equipment through the grease delivery pipeline 302, thereby realizing the grease lubrication of the shaft end sealing position.

[0059] Compared with the electric central lubrication system in the prior art, the discharging door driving assembly 2 and the lubricating device 3 of the concrete mixing equipment in the embodiment are powered by the same hydraulic power unit 1 (i.e. without the need to provide a power unit such as a motor for the lubricating device 3), that is, the opening or closing of the discharging door and the on or off of the grease delivery pipeline 302 can be realized, without consuming additional energy, thereby reducing the overall energy consumption of the concrete mixing equipment and saving energy. In addition, the structure of the concrete mixing equipment is simpler and the cost is lower, and it is stable and reliable during use, and the key components are not easy to be damaged and have a short service life, and the flow of lubricating grease is not easy to decrease with the increase of use time.

[0060] In one embodiment of the present invention, the concrete mixing equipment is provided with multiple shaft end sealing positions (in this embodiment, the number of shaft end sealing positions is preferably four). The lubrication device 3 also includes a distributor 307 disposed on the grease delivery pipeline 302 and located downstream of the switch valve. The distributor 307 includes an inlet end and multiple outlet ends. The grease delivery pipeline 302 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 301 and the inlet end of the distributor 307. The switch valve is disposed on the first pipe section. The first ends of the multiple second pipe sections are respectively connected to the multiple outlet ends of the distributor 307 one by one. The second ends of the multiple second pipe sections are respectively connected to the multiple shaft end sealing positions one by one. This allows the lubrication device 3 to simultaneously supply grease to the multiple shaft end sealing positions on the concrete mixing equipment, thereby improving the efficiency of the lubrication device 3 and expanding the application range of the lubrication device 3.

[0061] In one embodiment of the present invention, the lubrication device 3 further includes a filter 5 disposed on the grease delivery pipeline 302 for filtering the grease in the grease delivery pipeline 302 to prevent impurities in the grease from causing premature seal failure at the shaft end sealing position.

[0062] In one embodiment of the present invention, the concrete mixing equipment further includes a controller, such as... Figure 3 As shown, the controller is configured to perform the following steps:

[0063] Step S101: Determine that the concrete mixing equipment is in mixing function mode;

[0064] Step S102: Confirm that the concrete mixing equipment has completed unloading;

[0065] Step S103: Control the unloading gate drive assembly 2 to drive the unloading gate to close;

[0066] Step S104: Control the drive pipeline assembly 303 to open the drive switch valve so that the grease lubricates the shaft end seal position.

[0067] Specifically, 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 (this is the discharge process of the concrete mixing equipment), and closing the discharge gate after the concrete discharge is complete (i.e., the discharge process of the concrete mixing equipment is complete). 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.

[0068] 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.

[0069] After the controller determines that the concrete mixing equipment has completed unloading, it opens the first solenoid valve 4 so that the hydraulic pump pumps hydraulic oil into the first hydraulic pipe 202, 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 3033 so that the hydraulic pump can alternately input hydraulic oil into the first drive pipe 3031 and the second drive pipe 3032, thereby causing the first drive end 3034 and the second drive end 3035 of the switching valve to be alternately subjected to preset pressure and continuously conduct the grease delivery pipe 302. The grease in the grease tank 301 can then flow through the grease delivery pipe 302 to the shaft end seal position of the concrete mixing equipment and provide grease lubrication to the shaft end seal position.

[0070] In existing technologies, centralized electric lubrication systems control the start and stop of the electric lubrication pump via a programmable controller, supplying oil quantitatively at fixed intervals without considering the working state of the mixing unit. This leads to excessive or insufficient grease supply to the shaft end seal during standby or insufficient grease replenishment during load conditions, resulting in poor shaft end sealing and / or easy damage to the seals. In contrast, the concrete mixing equipment in this embodiment automatically lubricates the shaft end seal during mixing mode. This lubrication method better matches the actual operating conditions of the concrete mixing equipment, avoiding grease waste caused by continuous lubrication, further improving the sealing effect at the shaft end seal, and extending the service life of the seals.

[0071] In one embodiment of the invention, the controller is further configured to perform the following steps:

[0072] Step S201: Determine that the concrete mixing equipment is in mixing function mode;

[0073] Step S202: Control the hydraulic power unit 1 to start the working mode;

[0074] Step S203: Determine that the concrete mixing equipment is in non-mixing function mode;

[0075] Step S204: Control the hydraulic power unit 1 to shut down the working mode.

[0076] Specifically, the controller only controls the hydraulic power unit 1 to start working when the concrete mixing equipment is in the mixing function mode. That is, the hydraulic pump can only pump hydraulic oil into the first hydraulic pipe 202, the second hydraulic pipe 203, the first drive pipe 3031, or the second drive pipe 3032 when the concrete mixing equipment is in the mixing function mode. This ensures that the lubrication device 3 can only automatically supply grease lubrication to the shaft end seal position when the concrete mixing equipment is in the mixing function mode. If the concrete mixing equipment is in the non-mixing function mode, the controller controls the hydraulic power unit 1 to shut down the working mode, and the lubrication device 3 cannot supply grease lubrication to the shaft end seal position. The above settings ensure that the grease supply lubrication function of the lubrication device 3 is synchronized with the mixing function of the concrete mixing equipment, further avoiding the situation of excessive grease at the shaft end seal position.

[0077] In one embodiment of the invention, the controller is further configured to perform the following steps:

[0078] Step S301: Determine the preset closing time of the unloading gate;

[0079] Step S302: Control the drive pipeline assembly 303 to drive the switch valve to open, so that the grease lubricates the shaft end seal position.

[0080] Specifically, after the concrete mixing equipment finishes unloading, the controller closes the second solenoid valve 3033 and opens the first solenoid valve 4, 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 opening or closing; after the unloading gate closes for a preset time (e.g., 5s or 10s), the controller closes the first solenoid valve 4 and opens the second solenoid valve 3033, so that the hydraulic pump can only pump hydraulic oil into the first drive pipe 3031 or the second drive pipe 3032, to ensure that the first drive end 3034 or the second drive end 3035 of the switching valve is subjected to a preset pressure, thereby ensuring that the lubrication device 3 can stably supply grease lubrication to the shaft end sealing position, which helps to improve the stability and reliability of the concrete mixing equipment.

[0081] In one embodiment of the invention, the concrete mixing equipment further includes a flow sensor for detecting the flow rate of grease flowing to the shaft end seal location; the controller is also configured to perform the following steps:

[0082] Step S401: Obtain traffic;

[0083] Step S402: Determine that the flow rate is within the preset flow rate range;

[0084] Step S403: Control the drive pipeline assembly 303 to increase the number of times the drive switch valve is opened within a preset periodic time.

[0085] Specifically, the flow sensor is installed on the grease delivery pipeline 302 and near the shaft end seal position, and the controller and the flow sensor are communicatively connected; further, in this embodiment, the preset cycle time period refers to the time interval between two adjacent unloading operations performed by the concrete mixing equipment; the duration of a single grease supply lubrication at the shaft end seal position by the lubrication device 3 is a preset duration, which is less than half of the preset cycle time period.

[0086] With the valve open, the flow sensor continuously monitors the flow rate to detect the amount of grease flowing from the grease tank 301 to the shaft end seal. After detection, the flow sensor sends the result to the controller, which then obtains the flow rate of the grease at the shaft end seal. The controller compares this flow rate with a pre-stored flow range. If the flow rate exceeds the upper limit of the pre-stored range, the grease delivered by the grease delivery pipeline 302 meets the lubrication requirements at the shaft end seal. If the flow rate is within the pre-stored range, the grease delivered by the grease delivery pipeline 302 does not meet the lubrication requirements at the shaft end seal. To meet the lubrication requirements, the controller increases the operating frequency of the second solenoid valve 3033 within a preset periodic time, thereby increasing the number of times the drive pipeline assembly 303 drives the switching valve to open within that preset periodic time (e.g., changing the drive pipeline assembly 303 driving the switching valve to open once within a preset periodic time to twice within a preset periodic time). This increases the number of times the lubrication device 3 supplies grease to the shaft end seal within the preset periodic time, extending the total duration of grease supply lubrication at the shaft end seal within the preset periodic time, thus meeting the lubrication requirements at the shaft end seal and ensuring the sealing effect at the shaft end seal. Furthermore, in this embodiment, the preset flow rate range is 0.5 ml / min - 1 ml / min.

[0087] In another embodiment of the invention, the concrete mixing equipment further includes a flow sensor for detecting the flow rate of grease flowing to the shaft end seal location; the controller is also configured to perform the following steps:

[0088] Step S501: Obtain traffic;

[0089] Step S502: Determine that the flow rate is within the preset flow rate range;

[0090] Step S503: Increase the displacement of hydraulic power unit 1 to increase the opening degree of the switching valve in the open state.

[0091] If the grease delivered by the grease delivery pipeline 302 cannot meet the lubrication requirements at the shaft end seal, the total amount of grease delivered to the shaft end seal by the lubrication device 3 within a preset time can be increased by increasing the opening degree of the switch valve in the open state. This ensures the lubrication requirements at the shaft end seal and guarantees the sealing effect. Specifically, in this embodiment, the opening degree of the switch valve can be adjusted. The greater the pressure on the first drive end 3034 or the second drive end 3035 of the switch valve when it reaches the preset pressure, the greater the opening degree of the switch valve, and the more grease flows to the shaft end seal per unit time. Therefore, when the flow rate is within the preset flow rate range, the controller controls the hydraulic pump to increase its displacement (in this embodiment, the hydraulic pump displacement can be increased by increasing the speed of the hydraulic pump). The more hydraulic oil the hydraulic pump pumps to the first drive pipeline 3031 or the second drive pipeline 3032 per unit time, the greater the pressure of the hydraulic oil flowing to the first drive end 3034 or the second drive end 3035 of the switch valve, thereby increasing the opening degree of the switch valve in the open state.

[0092] In one embodiment of the invention, the controller is further configured to perform the following steps:

[0093] Step S601: Determine that the flow rate is less than or equal to a preset flow rate threshold;

[0094] Step S602: Determine that the hydraulic power unit 1 is in an abnormal working state;

[0095] Step S603: Adjust the working pressure of the hydraulic power unit 1 to restore the hydraulic power unit 1 to normal working condition.

[0096] Specifically, the preset flow rate threshold ranges from 0 ml / min to 0.2 ml / min; further, in this embodiment, the preset flow rate threshold is preferably 0 ml / min. If the controller compares the flow rate detected by the flow sensor with the preset flow rate threshold and finds that the flow rate is less than or equal to the preset flow rate threshold, it indicates that the hydraulic power unit 1 is in an abnormal working state (in this embodiment, the 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 amount drawn, or it refers to the state where the hydraulic power unit 1 cannot draw oil normally). At this time, the controller needs to adjust the working pressure of the hydraulic power unit 1 (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 returns to the normal working state, and the hydraulic power unit 1 can normally draw hydraulic oil from the hydraulic oil tank and alternately pump the hydraulic oil to the first drive pipeline 3031 or the second drive pipeline 3032, thereby enabling the lubrication device 3 to normally perform the grease supply lubrication function.

[0097] In one embodiment of the present invention, the concrete mixing equipment further includes a first alarm module for issuing a first alarm signal indicating that an abnormality has occurred in the concrete mixing equipment; the controller is also configured to perform the following steps:

[0098] Step S701: If the flow rate is within the preset flow rate range or less than the preset flow rate threshold, determine that an abnormal situation has occurred in the concrete mixing equipment;

[0099] Step S702: Control the first alarm module to send out the first alarm signal.

[0100] Specifically, when the flow rate is within the preset flow rate range, it indicates that the grease delivered by the grease delivery pipeline 302 cannot meet the lubrication requirements at the shaft end seal position, which is an abnormal situation. When the flow rate is less than the preset flow rate threshold, it indicates that the hydraulic power unit 1 is in an abnormal working state, which is also an abnormal situation. When the controller determines that an abnormal situation has occurred in the concrete mixing equipment, it controls the first alarm module to issue a first alarm signal (such as issuing an audible "Concrete mixing equipment has experienced an abnormal situation" sound or illuminating a yellow light) so that the operator can quickly notice that the concrete mixing equipment has experienced an abnormal situation and handle the above-mentioned abnormal situation.

[0101] In one embodiment of the present invention, the concrete mixing equipment further includes a second alarm module for issuing a second alarm signal indicating a malfunction of the concrete mixing equipment; the controller is also configured to perform the following steps:

[0102] Step S801: Accumulate the number of times the first alarm module sends the first alarm signal;

[0103] Step S802: Determine that the number of attempts exceeds the preset number;

[0104] Step S803: Determine that the concrete mixing equipment has malfunctioned;

[0105] Step S804: Control the second alarm module to send out a second alarm signal.

[0106] Specifically, after the first alarm module issues the first alarm signal, the controller accumulates the number of times the first alarm module issues the first alarm signal. When the number exceeds a preset number (e.g., 5 or 10 times), it indicates that the concrete mixing equipment is experiencing an abnormality too frequently, which will affect the performance of the concrete mixing equipment (e.g., a decrease in the sealing effect at the shaft end seal). Therefore, it is determined that the concrete mixing equipment has malfunctioned. At this time, the controller controls the second alarm module to issue a second alarm signal (e.g., issuing an audible "Concrete mixing equipment has malfunctioned" sound or illuminating a red light) so that the operator can quickly notice the malfunction and repair the concrete mixing equipment, allowing the malfunction to be eliminated as soon as possible. In this embodiment, the first alarm module and the second alarm module can be integrated into one unit. The setting of the first alarm module and the second alarm module enables the concrete mixing equipment to automatically detect abnormal conditions or malfunctions, improving the automation level and reliability of the concrete mixing equipment.

[0107] In one embodiment of the present invention, the lubrication device 3 further includes an operating handle 304 disposed on the grease delivery pipeline 302 for manually driving the switching valve to open or close. When the operator applies force to the operating handle 304 in a first direction, the operating handle 304 drives the switching valve to open; when the operator applies a second force to the operating handle 304 in a second direction (opposite to the first direction), the operating handle 304 drives the switching valve to close. The operating handle 304 allows the operator to still supply grease lubrication to the shaft end seal position via the lubrication device 3 even when the concrete mixing equipment is stopped, when the hydraulic power unit 1 malfunctions, or when a larger amount of grease is required.

[0108] In one embodiment of the present invention, the lubrication device 3 further includes an air release valve 305 disposed on the grease delivery pipeline 302 and used to discharge air inside the grease delivery pipeline 302. Specifically, when the grease is exhausted and air is drawn into the grease delivery pipeline 302, or when the grease delivery pipeline 302 cannot output grease for a long time due to other reasons, the operator can adjust the air release valve 305 to discharge the air inside the grease delivery pipeline 302 so that the lubrication device 3 can perform the grease supply and lubrication function normally. After the air inside the grease delivery pipeline 302 has been discharged, the operator locks the air release valve 305.

[0109] In one embodiment of the present invention, the lubrication device 3 further includes a pressure regulating relief valve 306 disposed on the grease delivery pipeline 302 and used to regulate the pressure inside the grease delivery pipeline 302. Specifically, the pressure regulating relief valve 306 is communicatively connected to the controller; the grease delivery pipeline 302 is also provided with a pressure sensor for detecting the pressure inside the grease delivery pipeline 302 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 302 is too high. At this time, the controller controls the pressure regulating relief valve 306 to regulate the pressure inside the grease delivery pipeline 302 so that the pressure inside the grease delivery pipeline 302 is within a suitable range, so as to ensure that the lubrication device 3 can normally perform the grease supply lubrication function.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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 device, characterized in that, The concrete mixing equipment includes: Hydraulic power unit (1), wherein the hydraulic power unit (1) is a hydraulic pump; 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. The lubrication device (3) includes a grease delivery pipeline (302) for delivering lubricating grease, a switching valve, and a drive pipeline assembly (303). The grease delivery pipeline (302) is connected to the shaft end sealing position of the concrete mixing equipment. The switching valve is disposed on the grease delivery pipeline (302) and is used to open or close the grease delivery pipeline (302). The drive pipeline assembly (303) is connected to the hydraulic power unit (1) and is used to drive the switching valve to open or close. The drive pipeline assembly (303) includes a first drive pipeline (3031), a second drive pipeline (3032), and a third drive pipeline (3033). Two solenoid valves (3033) are connected to the hydraulic pump via the first end of the first drive line (3031) and the first end of the second drive line (3032). The second end of the first drive line (3031) is connected to the first drive end (3034) of the switching valve, and the second end of the second drive line (3032) is connected to the second drive end (3035) of the switching valve. Controlling the opening or closing of the second solenoid valve (3033) can realize the conduction or cutoff control of the first drive line (3031) and the second drive line (3032).

2. The concrete mixing equipment according to claim 1, characterized in that, The concrete mixing equipment also includes a controller, which is configured to: The concrete mixing equipment is confirmed to be in mixing mode. Confirm that the concrete mixing equipment has completed unloading; The unloading gate drive assembly (2) is controlled to drive the unloading gate to close; The drive pipeline assembly (303) is controlled to drive the switch valve to open so that the grease lubricates the shaft end seal.

3. The concrete mixing equipment according to claim 2, characterized in that, The controller is further configured to: Determine the preset closing time of the unloading gate; The drive pipeline assembly (303) is controlled to drive the switch valve to open so that the grease lubricates the shaft end seal.

4. The concrete mixing equipment according to claim 2, characterized in that, The concrete mixing equipment also includes a flow sensor for detecting the flow rate of grease flowing to the shaft end seal location; the controller is further configured to: Obtain the traffic; It is determined that the flow rate is within a preset flow rate range; The drive pipeline assembly (303) is controlled to increase the number of times the switching valve is driven to open within a preset periodic time.

5. The concrete mixing equipment according to claim 2, characterized in that, The concrete mixing equipment also includes a flow sensor for detecting the flow rate of grease flowing to the shaft end seal location; the controller is further configured to: Obtain the traffic; It is determined that the flow rate is within a preset flow rate range; Increase the displacement of the hydraulic power unit (1) to increase the opening degree of the switching valve in the open state.

6. The concrete mixing equipment according to claim 4 or 5, characterized in that, The controller is also configured to: Determine that the flow rate is less than or equal to a preset flow rate threshold; It is determined that the hydraulic power unit (1) is in an abnormal working state; Adjust the working pressure of the hydraulic power unit (1) to restore the hydraulic power unit (1) to normal working state.

7. The concrete mixing equipment according to claim 6, characterized in that, The concrete mixing equipment also includes a first alarm module for issuing a first alarm signal indicating an abnormality in the concrete mixing equipment; the controller is further configured to: If the flow rate is within the preset flow rate range, or if the flow rate is less than the preset flow rate threshold, it is determined that the concrete mixing equipment has experienced the abnormal situation. Control the first alarm module to issue the first alarm signal.

8. The concrete mixing equipment according to claim 7, characterized in that, The concrete mixing equipment also includes a second alarm module for issuing a second alarm signal indicating a malfunction of the concrete mixing equipment; the controller is further configured to: The total number of times the first alarm module issues the first alarm signal; It is determined that the number of times exceeds a preset number; It has been determined that the concrete mixing equipment has malfunctioned; Control the second alarm module to issue the second alarm signal.

9. The concrete mixing equipment according to claim 1, characterized in that, The lubrication device (3) also includes an operating handle (304) for manually driving the switching valve to open or close.

10. The concrete mixing equipment according to claim 1, characterized in that, The lubrication device (3) further includes: An air release valve (305) is provided on the grease delivery pipeline (302) and is used to release the air inside the grease delivery pipeline (302); A pressure regulating overflow valve (306) is provided on the grease delivery pipeline (302) and is used to regulate the pressure inside the grease delivery pipeline (302).

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