Multi-area double-line lubricating system based on equipment function classification and cooperative control method

Abstract

The invention relates to the technical field of centralized lubrication of industrial equipment, and discloses a multi-area double-line lubrication system based on equipment function classification and a cooperative control method. The regional control valve groups are communicated with the central lubrication pump station, are isolated from one another and are respectively communicated with lubrication points of different equipment; the central lubrication pump station and the regional control valve group form a double-line lubrication system, and the central lubrication pump station sets lubrication oil pumping parameters according to different equipment functions. The central lubrication pump station is communicated with the regional control valve groups to form a double-line lubrication system, and the central lubrication pump station sets lubricating oil pumping parameters corresponding to equipment functions so as to control the corresponding regional control valve groups to be communicated with the corresponding lubrication points; and the lubricating oil injection amounts of different devices are different, and the oil pumping periods of different devices are different, so that precise lubrication coordinated with the working logic of a roller line, a jacking table and a centering piece in the steel plate warehousing production line is realized.

Description

Technical Field

[0001] This invention relates to the field of centralized lubrication technology for industrial equipment, specifically to a multi-zone dual-line lubrication system and a collaborative control method based on equipment function classification. Background Technology

[0002] Centralized lubrication systems are crucial for maintaining reliable operation of modern large-scale machinery. Existing technologies have focused on addressing the problem of uneven oil demand at various lubrication points. For example, Chinese patent document CN114542933A proposes a "lubrication method with independently adjustable grease discharge in different zones." This method divides lubrication points into different zones based on their oil demand (fixed, variable, or large), and combines a fixed-displacement dual-line distributor with a progressive distributor whose operating time is adjustable. This allows for flexible proportional adjustment of the total oil output in different zones, effectively overcoming the limitations of relying solely on the distributor's own structure to adjust the discharge volume.

[0003] However, the inventors' in-depth research revealed that the "zoning" logic of existing technologies, represented by this scheme, is essentially still an optimization allocation of the physical output of lubricating grease, with the core control focusing on solving the problem of "how much to supply." For complex automated production lines integrating multiple functional devices (such as continuously conveying roller conveyors, intermittently heavy-duty lifting platforms, and high-precision centering mechanisms), this zoning method based on oil demand has significant shortcomings. The lubrication requirements of different types of equipment are not only reflected in the difference in "quantity," but more fundamentally in the lubrication strategy, timing, and reliability requirements. For example, lifting platforms require lubrication at specific stages of each operation cycle, rather than simply timed and quantitative lubrication; high-precision mechanisms have much higher requirements for lubrication stability and cleanliness than ordinary conveyor lines. Existing centralized lubrication systems (including the above-mentioned scheme) use a unified, time- or pressure-based control logic, which cannot adapt to these differentiated lubrication strategy requirements determined by the inherent functions of the equipment. This leads to the system potentially providing insufficient lubrication to critical equipment or excessive lubrication to non-critical equipment, failing to achieve precise lubrication that coordinates with the working logic of equipment with different functions on the production line.

[0004] Existing technologies have failed to systematically partition and control architecture design from the perspective of "equipment functions," which restricts the development of intelligent and refined lubrication levels in complex production lines (such as steel plate warehousing production lines). Summary of the Invention

[0005] To address the problem that existing centralized lubrication systems cannot achieve precise lubrication in coordination with the working logic of equipment with different functions in a production line, this invention provides a multi-zone dual-line lubrication system and a coordinated control method based on equipment function classification. The specific technical solution is as follows: A multi-zone dual-line lubrication system based on equipment function classification includes: a central lubrication pump station; several zone control valve groups connected to the central lubrication pump station, the zone control valve groups being isolated from each other and respectively connected to the lubrication points of different equipment; the central lubrication pump station and the zone control valve groups form a dual-line lubrication system, and the central lubrication pump station sets corresponding lubricating oil pumping parameters according to the functional characteristics of different equipment.

[0006] Furthermore, the lubrication pipeline includes a main pipeline and branch pipelines. The central lubrication pump station is connected to the control valve groups of each area through the main pipeline, and the control valve groups of each area are connected to the lubrication points of different equipment through branch pipelines. The central lubrication pump station includes a controller and dual-line lubrication pumps. The controller sets corresponding oil pumping strategies according to the functional characteristics of different equipment to control the dual-line lubrication pumps to execute corresponding lubricating oil pumping commands. The zone control valve assembly includes a high-pressure solenoid valve connected to a branch line. The controller can control the opening and closing of the high-pressure solenoid valve to control the on / off state of the branch line.

[0007] Preferably, the zone control valve assembly also includes a pressure sensor connected to the main pipeline. The pressure sensor can detect the pressure in the main pipeline and is electrically connected to the controller to transmit pressure signals in real time.

[0008] Preferably, the area control valve group further includes an adjustable metering distributor connected to a high-pressure solenoid valve. A single high-pressure solenoid valve is connected to several adjustable metering distributors through a branch pipeline. A single adjustable metering distributor is connected to a single lubrication point. The adjustable metering distributor forms an adjustment mechanism that can finely adjust the oil output.

[0009] Preferably, the lubricating oil pumping parameters include the lubricating oil pumping dosage per reversal of the dual-line lubricating pump, the number of internal reversals, and the pumping cycle for the same equipment.

[0010] A collaborative control method includes the following steps: Based on the preset lubrication strategy, determine the lubricating oil pumping parameters corresponding to the target lubrication area; Based on the lubricating oil pumping parameters, control the start of the dual-line lubricating pump to increase the oil pressure in the main pipeline. Obtain real-time oil pressure data of the main pipeline, generate oil pressure change curve 1 based on the real-time oil pressure data, and perform matching analysis with the preset standard pressure change curve 1. When the matching analysis result meets the first preset condition, the high-pressure solenoid valve connected to the target lubrication area is opened to perform an oil pumping operation on the area. After a single pumping operation is completed, oil pressure data is continuously acquired to generate an oil pressure change curve two, which is then matched and analyzed with a preset standard pressure change curve two. When the matching analysis results meet the reversal conditions, control the dual-line lubrication pump to perform a reversal operation; The pumping and reversing operations are performed cyclically until the operation completion conditions specified in the lubricating oil pumping parameters are met.

[0011] Furthermore, the lubrication strategy is determined by the lubricating oil consumption rate of the lubricated equipment collected during the production process; standard pressure change curve one or two are both determined by the oil pressure change curve established by manually injecting a fixed amount of lubricating oil.

[0012] Preferably, the matching analysis step includes: analyzing the average rise rate of oil pressure change curve one or two; when its average rise rate is lower than the lowest value of the average rise rate of standard pressure change curve one or two, generating an alarm message indicating leakage; when its average rise rate is higher than the highest value of the average rise rate of standard pressure change curve one or two, generating an alarm message indicating blockage.

[0013] Preferably, the first preset condition refers to the average rate of rise of the collected oil pressure change curve falling between the minimum and maximum values ​​of the average curvature of the standard pressure change curve.

[0014] Preferably, the reversal condition refers to the average rate of rise of the collected oil pressure change curve II falling between the minimum and maximum values ​​of the average curvature of the standard pressure change curve II.

[0015] As can be seen from the above technical solution, the present invention has the following beneficial effects: This invention establishes a dual-line lubrication system by setting up a central lubrication pump station that connects multiple isolated regional control valve groups. The central lubrication pump station sets corresponding lubricating oil pumping parameters according to the working logic of different equipment, thereby controlling the regional control valve groups for specific equipment to connect to corresponding lubrication points. This results in differences in the amount of lubricating oil injected into different equipment and differences in the pumping cycle of different equipment during a single pumping task, thereby achieving precise lubrication that coordinates with the working logic of the roller line, lifting platform, and centering parts in the steel plate warehousing production line. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the lubrication system of the present invention.

[0017] In the diagram: 1. Central lubrication pump station; 11. Controller; 12. Dual-line lubrication pump; 2. Area control valve group; 21. High-pressure solenoid valve; 22. Pressure sensor; 3. Adjustable quantitative distributor; 4. Lubrication pipeline; 41. Main pipeline; 42. Branch pipeline; 5. Roller conveyor; 6. Lifting platform; 7. Alignment component. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0020] Example 1 like Figure 1 As shown, this embodiment is a multi-zone dual-line lubrication system based on equipment function classification, which includes: a central lubrication pump station 1; several zone control valve groups 2 connected to the central lubrication pump station 1, the zone control valve groups 2 being isolated from each other and respectively connected to the lubrication points of different equipment; the central lubrication pump station 1 and the zone control valve groups 2 form a dual-line lubrication system, and the central lubrication pump station 1 sets corresponding lubricating oil pumping parameters according to the functional characteristics of different equipment.

[0021] Specifically, this embodiment is used for lubrication of a steel plate warehousing conveyor line. The steel plate warehousing conveyor line includes a roller conveyor 5 for conveying steel plates, a lifting platform 6 for lifting steel plates for centering, and a centering component 7 for centering along the width direction of the steel plates. The roller conveyor 5 includes several rollers that need lubrication, the lifting platform 6 includes several rollers that need lubrication and roll along the width direction of the steel plates, and the centering component 7 includes several slide rails and other parts that need lubrication to achieve centering movement. The figure only shows all the lubrication points of the roller conveyor 5, all the lubrication points of the lifting platform 6, and all the lubrication points of the centering component 7. The lifting platform 6 needs to bear weight and provide stable lifting. It includes 52 lubrication points and requires high-frequency and high-volume lubricating oil pumping parameters to ensure that the lifting structure is always adequately lubricated. For example, it is pumped once every 3 days, and the lubricating oil pumping dosage is set according to the site requirements. The centering component 7 requires high precision and includes 21 lubrication points to push the steel plate to the center position of the roller line 5. It requires low frequency and medium oil volume to ensure accurate centering of the centering structure. For example, it is pumped once every 7 days, and the lubricating oil pumping dosage is set according to the site requirements. The roller line 5 needs to operate continuously and includes 94 lubrication points. It requires medium frequency and large oil volume to ensure stable and continuous operation of the rollers. For example, it is pumped once every 2 days, and the lubricating oil pumping dosage is set according to the site requirements.

[0022] Secondly, this embodiment includes a central lubrication pump station 1, which is connected to an oil tank for outputting and recovering lubricating oil. The central lubrication pump station 1 is connected to three zone control valve groups 2, which are respectively connected to the lubrication points of the roller conveyor 5, the lifting platform 6, and the centering component 7. The roller conveyor 5, the lifting platform 6, and the centering component 7 play different roles in the steel plate warehousing conveyor line, and therefore the lubricating oil consumption rate is different. This makes each zone control valve group 2 a switch connecting the central lubrication pump station 1 to the roller conveyor 5, the lifting platform 6, or the centering component 7, so that it can control the amount or frequency of lubricating oil pumped to the roller conveyor 5, the lifting platform 6, or the centering component 7, thereby providing appropriate lubricating oil to the lubrication points of the roller conveyor 5, the lifting platform 6, or the centering component 7, thereby achieving precise lubrication and ensuring the stability, accuracy, and service life of the roller conveyor 5, the lifting platform 6, or the centering component 7.

[0023] Secondly, the central lubrication pump station 1 and the area control valve group 2 form a dual-line lubrication system. The dual-line lubrication system is a conventional lubrication method in this field. It provides timed, quantitative, differentiated and monitorable automatic lubrication to each lubrication point of the equipment through two main pipelines 41 that alternately supply pressure and drive the parallel quantitative distributor. The central lubrication pump station 1 pumps out a fixed and precise amount of oil in one cycle. The amount of oil pumped out in one cycle and the number of cycles is the total amount of lubricating oil pumped out by the central lubrication pump station 1, which enables the area control valve group 2 to deliver a precise total amount of lubricating oil to the roller line 5, the lifting platform 6 or the centering component 7.

[0024] Furthermore, the lubrication pipeline 4 includes a main pipeline 41 and branch pipelines 42. The central lubrication pump station 1 is connected to each area control valve group 2 through two main pipelines 41, and the area control valve group 2 is connected to the lubrication points of different equipment through two branch pipelines 42. The central lubrication pump station 1 includes a controller 11 and a dual-line lubrication pump 12. The controller 11 sets corresponding oil pumping strategies according to the functional characteristics of different equipment to control the dual-line lubrication pump 12 to execute corresponding lubricating oil pumping commands. The area control valve group 2 includes a high-pressure solenoid valve 21 connected to the branch pipeline 42. The controller 11 can control the opening and closing of the high-pressure solenoid valve 21 to control the on / off of the branch pipeline 42.

[0025] Specifically, in this embodiment, the controller 11 is a PLC. When the oil level in the central lubrication pump station 1 is lower than the normal value, the low oil level sensor installed on the oil tank sends a low oil level alarm signal to the controller 11. The controller 11 then sends an alarm to the operator via an alarm device, reminding the operator to replenish the lubricating oil in the tank in time. Secondly, the central lubrication pump station 1 is connected to three zone control valve groups 2 via the main pipeline 41. The three zone control valve groups 2 are respectively connected to the roller conveyor 5, the lifting platform 6, and the centering component 7 via branch pipelines 42. The high-pressure solenoid valve 21 is connected to both the branch pipeline 42 and the main pipeline 41. The high-pressure solenoid valve 21 is a three-position four-way solenoid directional valve with a three-dimensional sealing structure, mainly used for on / off control of fluid under high pressure. The high-pressure solenoid valve 21 is connected to the controller 11 via two main pipelines 41, enabling the controller 11 to control the on / off state of the high-pressure solenoid valve 21, thereby controlling the connection state between the main pipeline 41 and the branch pipeline 42. The controller 11 is a control element that controls the dual-line lubrication pump 12 and the high-pressure solenoid valve 21. The operator sets lubrication pumping commands for the roller line 5, the lifting platform 6, and the centering component 7 based on their functions and the lubrication oil consumption efficiency obtained in actual production. This ensures that the dual-line circulation pump and the single high-pressure solenoid valve 21 can provide sufficient and non-overflowing lubrication oil to the roller line 5, the lifting platform 6, and the centering component 7, thus preventing wear or lubrication oil spillage that pollutes the environment and improving their service life.

[0026] Furthermore, the zone control valve assembly 2 also includes a pressure sensor 22 connected to the main pipeline 41. The pressure sensor 22 can detect the pressure inside the main pipeline 41, and the pressure sensor 22 is electrically connected to the controller 11 to transmit pressure signals in real time.

[0027] Specifically, the single-area control valve group 2 includes a single pressure sensor 22. When the high-pressure solenoid valve 21 is in the open state, the pressure sensor 22 measures the oil pressure in the main pipeline 41 and then transmits the measurement data to the controller 11 for comparison with the preset working pressure range. The operator sets the normal working pressure range based on actual production experience, so that the controller 11 can know whether the main pipeline 41 is leaking or blocked through the pressure sensor 22. Secondly, when a high-pressure solenoid valve 21 is in the open state, the pressure sensor 22 connected to the open high-pressure solenoid valve 21 can measure the oil pressure in the main pipeline 41 and the corresponding branch pipeline 42, and then transmit the measurement results to the controller 11, so that the controller 11 can know whether the lubricating oil injection of the corresponding roller line 5, lifting platform 6 or centering component 7 has been completed, or whether the corresponding branch pipeline 42 is leaking or blocked through the pressure sensor 22.

[0028] Furthermore, the area control valve group 2 also includes an adjustable metering distributor 3 connected to the high-pressure solenoid valve 21. A single high-pressure solenoid valve 21 is connected to several adjustable metering distributors 3 through a branch pipeline 42. A single adjustable metering distributor 3 is connected to a single lubrication point. The adjustable metering distributor 3 forms an adjustment mechanism that can finely adjust the oil output.

[0029] Specifically, when the high-pressure solenoid valve 21 controls the connection between the branch pipe 42 and the main pipe 41 at the corresponding position, the lubricating oil in the branch pipe 42 flows out through the adjustable metering distributor 3 under high pressure. The adjustable metering distributor 3 corresponds to the lubrication point one by one, and it includes a valve body, a dosage piston, a screw fine-tuning adjustment mechanism, a reversing valve core, and a piston indicator rod. The valve body is connected to the branch pipe 42, and the dual-line lubrication system outputs lubricating oil with different flow directions to the valve body and the dosage piston, thereby pushing the dosage piston to output a metered amount of lubricating oil to the lubrication point. Then, the screw is adjusted to adjust the stroke of the dosage piston, thereby fine-tuning the amount of lubricating oil output in one cycle. The number of lubricating oil cycles at different lubrication points of the same branch pipe 42 is the same, thereby accurately setting the final oil output of each lubrication point.

[0030] Furthermore, the lubricating oil pumping parameters include the lubricating oil pumping dosage per reversal of the dual-line lubricating pump, the number of internal reversals, and the pumping cycle for the same equipment.

[0031] Specifically, the dual-line lubrication pump 12 completes one cycle with each reversal, so the number of reversals is the number of cycles. The amount of oil pumped per cycle is a set value. Each reversal completes two single oil pumping cycles, making the amount of oil pumped per cycle twice the amount of oil pumped per single cycle, which is also a set value. Thus, the product of the amount of oil pumped per cycle and the number of cycles is the total amount of oil pumped by the dual-line lubrication pump 12 to the roller line 5, the lifting platform 6, or the centering component 7 in one cycle. Secondly, the oil pumping cycle refers to the interval between the oil pumping tasks of the dual-line lubrication pump 12 for a specific piece of equipment.

[0032] Example 2 A collaborative control method based on Embodiment 1 includes the following steps: determining the lubricating oil pumping parameters corresponding to the target lubrication area according to a preset lubrication strategy. Specifically, the lubrication strategy is determined by the lubricating oil consumption rate of the lubricated equipment collected during the production process and the local time, thereby determining the lubricating oil consumption rate of different equipment at different time periods. Based on this, the operator formulates different lubricating oil pumping dosages, internal reversal times, and different pumping cycles for different equipment, and inputs them into the controller 11 so that the controller 11 can inject lubricating oil into the roller line 5, the lifting platform 6, or the centering component 7 accordingly.

[0033] Furthermore, based on the lubricating oil pumping parameters, the dual-line lubrication pump 12 is started to increase the oil pressure in the main pipeline 41. Specifically, the controller 11 determines the type of equipment requiring oil injection based on the lubricating oil pumping cycle of the roller line 5, the lifting platform 6, or the centering component 7, and controls the dual-line lubrication pump 12 to inject a fixed amount of lubricating oil into the main pipeline 41. Because the main pipeline 41 is a closed space, the oil pressure in the main pipeline 41 increases.

[0034] Furthermore, real-time oil pressure data of the main pipeline 41 is obtained, and an oil pressure change curve 1 is generated based on the real-time oil pressure data. This curve is then matched and analyzed with a preset standard pressure change curve 1. Specifically, the controller 11 obtains real-time oil pressure data within the main pipeline 41 through the pressure sensor 22 and establishes a curve showing the change in oil pressure over time, thus forming the first oil pressure change curve of the main pipeline 41.

[0035] Furthermore, when the matching analysis result meets the first preset condition, the high-pressure solenoid valve 21 connected to the target lubrication area is opened to perform an oil pumping operation on the area. Specifically, the first preset condition refers to the average rise rate of the collected oil pressure change curve 1 falling between the lowest and highest values ​​of the average rise curvature of the standard pressure change curve 1. The standard pressure change curve 1 is generated by manually injecting the single pumping dose of lubricating oil into the main pipeline 41 multiple times under normal conditions, and recorded and generated by the pressure sensor 22 and the controller 11. Its average rise rate is calculated based on the total oil pressure rise rate after a single injection. Due to errors or factors such as measuring tools, the oil pressure fluctuates, and therefore the average rise rate fluctuates, i.e., the lowest and highest values. Therefore, the controller 11 compares and analyzes the average rise rate of the collected oil pressure change curve 1 with the standard pressure change curve 1 to determine whether the average rise rate of the oil pressure change curve 1 meets the first preset condition, and then determines that the main pipeline 41 can be used normally. Then, it controls the high-pressure solenoid valve 21 of the corresponding branch pipeline 42 to open, so that the dual-line lubricating pump 12 injects the single pumping dose of lubricating oil into the designated equipment through the connected branch pipeline 42 according to the lubricating oil pumping parameters, and then begins to inject lubricating oil into it.

[0036] Furthermore, after a single pumping operation is completed, oil pressure data is continuously acquired to generate a second oil pressure change curve, which is then matched and analyzed with a preset standard pressure change curve. Specifically, after a single movement of the dual-line lubrication pump 12 injects a fixed amount of lubricating oil into the designated equipment, the oil pressure change in the corresponding branch pipeline 42 is similar to or the same as the oil pressure change in the main pipeline 41. The oil pressure change data measured by the pressure sensor 22 can also be the oil pressure change data in the connected branch pipeline 42, which is transmitted to the controller 11 to generate the second oil pressure change curve for the branch pipeline 42. The standard pressure change curve is generated by manually injecting lubricating oil into the main pipeline 41 and the corresponding connected branch pipeline 42 multiple times under normal conditions of the main pipeline 41, branch pipeline 42, adjustable metering distributor 3, and lubrication points using a dual-line lubrication pump 12. The oil pressure is recorded and generated by the pressure sensor 22 and controller 11. The average rise rate is calculated based on the total oil pressure rise rate after a single injection. Due to errors or factors such as measuring tools, the oil pressure fluctuates, and therefore the average rise rate fluctuates, i.e., the minimum and maximum values.

[0037] Furthermore, when the matching analysis results meet the reversal conditions, the dual-line lubrication pump 12 is controlled to perform a reversal operation; the pumping operation and reversal operation are performed cyclically until the operation completion conditions specified in the lubrication oil pumping parameters are met. Specifically, the reversal condition refers to the average rising rate of the collected oil pressure change curve 2 falling between the lowest and highest values ​​of the average rising curvature of the standard pressure change curve 2. The controller 11 compares the collected oil pressure change curve 2 with the standard pressure change curve 2 to determine whether the reversal condition is met. When the reversal condition is met, the controller 11 controls the dual-line lubrication pump 12 to reverse and pumps a fixed amount of lubricating oil to the lubrication point of the corresponding equipment again. At the same time, the pressure sensor 22 continues to collect oil pressure change data. The controller 11 continues to generate the corresponding change curve for the oil pressure change data pumped this time and continues to compare it. This ensures that after each pumping process of the dual-line lubrication pump 12, the controller 11 can detect in real time whether the lubricating oil is injected normally into the corresponding lubrication point, thereby ensuring its injection effect. This continues until the number of reversals of the dual-line lubrication pump 12 meets the corresponding lubricating oil pumping parameters, thus completing the pumping task of the roller line 5, the lifting platform 6, or the centering component 7 within one cycle.

[0038] Furthermore, the matching analysis steps include: analyzing the average rate of rise of oil pressure change curve one or two; when its average rate of rise is lower than the lowest value of the average rate of rise of standard pressure change curve one or two, generating an alarm message indicating leakage; when its average rate of rise is higher than the highest value of the average rate of rise of standard pressure change curve one or two, generating an alarm message indicating blockage.

[0039] Specifically, when the average rate of increase of the first oil pressure change curve is lower than the lowest value of the average rate of increase of the first standard pressure change curve, it indicates that there is a leak in the main pipeline 41, causing the lubricating oil to overflow. The controller 11 sends a leak alarm signal to the alarm, such as "leak, leak...", to notify the operator to check the main pipeline 41. When the average rate of increase of the first oil pressure change curve is higher than the highest value of the average rate of increase of the first standard pressure change curve, it indicates that the space in the main pipeline 41 that can hold the lubricating oil has decreased, that is, there is a blockage, which increases the average rate of increase of the oil pressure. The controller 11 sends a blockage alarm signal to the alarm, such as "blockage, blockage...", to notify the operator to check the main pipeline 41.

[0040] When the average rate of increase of the second oil pressure change curve is lower than the minimum value of the average rate of increase of the second standard pressure change curve, it indicates that there is a leak in the branch line 42, causing the lubricating oil to overflow. The controller 11 sends a leak alarm signal to the alarm, such as "leaking, leaking...", to notify the operator to check the branch line 42. When the average rate of increase of the second oil pressure change curve is higher than the maximum value of the average rate of increase of the second standard pressure change curve, it indicates that the lubricating oil in the branch line 42, the adjustable metering distributor 3, or the lubrication point cannot flow out at the normal flow rate, that is, there is a blockage point, which increases the average rate of increase of the oil pressure. The controller 11 sends a blockage alarm signal to the alarm, such as "blocked, blocked...", to notify the operator to check the branch line 42, the adjustable metering distributor 3, and the lubrication point.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0042] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A multi-zone two-line lubrication system based on device function classification, characterized in that, The lubricating system comprises: a central lubricating pump station (1); a plurality of area control valve groups (2) in communication with the central lubricating pump station (1), the area control valve groups (2) being isolated from each other and being in communication with lubricating points of different equipment respectively; the central lubricating pump station (1) and the area control valve groups (2) form a double-line lubricating system, and the central lubricating pump station (1) sets corresponding lubricating oil pumping parameters according to the functional characteristics of different equipment.

2. The multi-zone two-line lubrication system of claim 1, wherein: The lubricating pipeline (4) comprises a main pipeline (41) and branch pipelines (42), the central lubricating pump station (1) is in communication with each of the area control valve groups (2) through the main pipeline (41), and each of the area control valve groups (2) is in communication with lubricating points of different equipment through the branch pipelines (42); the central lubricating pump station (1) comprises a controller (11) and a double-line lubricating pump (12), the controller (11) sets corresponding oil pumping strategies according to the functional characteristics of different equipment to control the double-line lubricating pump (12) to execute corresponding lubricating oil pumping instructions; the area control valve group (2) further comprises a high-pressure electromagnetic valve (21) in communication with the branch pipeline (42), and the controller (11) can control the high-pressure electromagnetic valve (21) to open and close to control the branch pipeline (42) to be on or off.

3. The multi-zone two-line lubrication system of claim 2, wherein: The area control valve group (2) further comprises a pressure sensor (22) in communication with the main pipeline (41), the pressure sensor (22) can detect the pressure in the main pipeline (41), and the pressure sensor (22) is electrically connected with the controller (11) to transmit pressure signals in real time.

4. The multi-zone, two-line lubrication system of claim 3, wherein: The area control valve group (2) further comprises an adjustable quantitative distributor (3) in communication with the high-pressure electromagnetic valve (21), a single high-pressure electromagnetic valve (21) is in communication with a plurality of adjustable quantitative distributors (3) through the branch pipeline (42), a single adjustable quantitative distributor (3) is in communication with a single lubricating point, and the adjustable quantitative distributor (3) forms an adjusting mechanism capable of adjusting the oil output.

5. The multi-zone, two-line lubrication system of claim 4, wherein: The lubricating oil pumping parameters comprise a lubricating oil pumping dose of the double-line lubricating pump (12) per reversing, a number of internal reversings, and a lubricating oil pumping period for the same equipment.

6. A method for coordinated control of a multi-zone two-line lubrication system according to claim 5, characterized in that The cooperative control method comprises the following steps: determining lubricating oil pumping parameters corresponding to a target lubricating area according to a preset lubricating strategy; controlling the double-line lubricating pump to start based on the lubricating oil pumping parameters to make the oil pressure in the main pipeline rise; obtaining real-time oil pressure data of the main pipeline and generating an oil pressure change curve I according to the real-time oil pressure data, and matching and analyzing the oil pressure change curve I with a preset standard pressure change curve I; when the matching and analyzing result meets a first preset condition, controlling a high-pressure electromagnetic valve in communication with the target lubricating area to open to execute a single lubricating oil pumping operation on the area; after the single lubricating oil pumping operation is completed, continuously obtaining oil pressure data to generate an oil pressure change curve II, and matching and analyzing the oil pressure change curve II with a preset standard pressure change curve II; when the matching and analyzing result meets a reversing condition, controlling the double-line lubricating pump to execute a reversing operation. The pumping operation and the reversing operation are repeatedly performed until a work completion condition specified in the lubricating oil pumping parameter is reached.

7. The collaborative control method of claim 6, wherein: The lubrication strategy is determined by a lubricating oil consumption rate of the lubricated equipment collected in the production process; and the one or two standard pressure variation curves are determined by an oil pressure variation curve established by manual quantitative injection of lubricating oil.

8. The collaborative control method of claim 7, wherein: The matching analysis step includes: analyzing the average rising rate of the one or two oil pressure variation curves, generating an alarm information of existence of a leak when the average rising rate is lower than the minimum value of the average rising rate of the one or two standard pressure variation curves, and generating an alarm information of existence of a blockage when the average rising rate is higher than the maximum value of the average rising rate of the one or two standard pressure variation curves.

9. The collaborative control method of claim 8, wherein: The first preset condition refers to that the average rising rate of the collected oil pressure variation curve one falls between the minimum value and the maximum value of the average rising rate of the standard pressure variation curve one.

10. The collaborative control method of claim 8, wherein: The reversing condition refers to that the average rising rate of the collected oil pressure variation curve two falls between the minimum value and the maximum value of the average rising rate of the standard pressure variation curve two.

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