Cooling liquid overflow detection system and method

Abstract

The invention provides a cooling liquid overflow detection system and method. The cooling liquid overflow detection system comprises a cooling water tank, and two liquid level monitoring assemblies are detachably connected into the cooling water tank; a water inlet pipe is arranged at the side part of the cooling water tank; an electromagnetic valve I and a flow meter II are mounted in the water inlet pipe; an overflow pipe is arranged on the side portion of the cooling water tank, and a first flow meter is installed in the overflow pipe. A drainage pipe is arranged in the cooling water tank and is connected with a water pump; a flow meter III is arranged in the drainage pipe; the liquid level monitoring assembly is connected with the electromagnetic relay; the electromagnetic relay is connected with the remote CC-LINK device, and the remote CC-LINK device is connected with the PLC control unit; the PLC control unit is connected with a man-machine conversation device; the first flow meter, the second flow meter and the third flow meter are connected with a PLC control unit. According to the invention, the problem of cooling liquid overflow is effectively solved, and the crossing from passive alarm to active early warning, from manual troubleshooting to intelligent diagnosis, and from manual cleaning to automatic maintenance is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial cooling systems, in particular to a cooling liquid overflow detection system and method. BACKGROUND

[0002] With the rapid development of electronic technology, TFT-LCD (Thin Film Transistor-Liquid Crystal Display) has been widely used in various electronic products such as smart phones, televisions, tablet computers, etc. The manufacturing core of TFT-LCD display screen is TFT-LCD glass substrate, which requires extremely high surface flatness and usually needs to be processed by high-precision grinding machines.

[0003] During the grinding process, the grinding wheel generates a large amount of heat, which must be continuously cooled by a reliable cooling water supply system to prevent thermal deformation of the glass substrate and damage to the grinding wheel. The system usually includes a source water supply system, a cooling liquid quantitative supply system, a cooling water constant pressure supply system, a cooling water tank and an electrical control unit, responsible for completing the synchronous quantitative mixing and constant pressure supply of cooling liquid and source water.

[0004] Currently, the cooling water tank in this field has the following technical pain points: first, the liquid level monitoring usually uses a single sensor, which has insufficient reliability and is prone to false alarms or missed alarms due to sensor jamming or failure; second, when the liquid level is too high, the system can only indicate that the liquid level is high, but cannot automatically diagnose and indicate the root cause (such as whether the water inlet valve is faulty and cannot be closed or whether the overflow pipeline is blocked), greatly prolonging the troubleshooting time and maintenance downtime; third, the grinding debris and oil stains in the cooling liquid are easily attached to the surface of the monitoring element, affecting its sensitivity and accuracy, and frequent manual cleaning is required; in addition, the sediment at the bottom of the cooling water tank is difficult to effectively automatically discharge, and the traditional manual cleaning method is time-consuming and labor-intensive, affecting production efficiency; finally, the existing overflow system is simple in design, and the overflow speed is often lower than the water supply speed, still cannot completely avoid the risk of cooling liquid overflowing from the top of the water tank, and the overflowing cooling liquid not only wastes resources, but also may cause equipment short circuit and deterioration of production environment.

[0005] Therefore, there is an urgent need for an efficient cooling liquid overflow detection and management solution that integrates intelligent monitoring, fault self-diagnosis, automatic cleaning and maintenance functions to solve the above problems and ensure the continuous, stable and efficient operation of TFT-LLCD glass substrate production lines. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application aims to provide a cooling liquid overflow detection system and method that can solve the existing problems.

[0007] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0008] The application is achieved by the technical scheme as follows: a cooling liquid overflow detection system, comprising:

[0009] The cooling water tank is provided with a cover plate at the top end, and two liquid level monitoring assemblies are detachably connected in the cooling water tank; a water inlet pipe is arranged on the side of the cooling water tank, and an electromagnetic valve one and a flow meter two are installed in the water inlet pipe; an overflow pipe is arranged on the side of the cooling water tank, and a flow meter one is installed in the overflow pipe; a drain pipe is arranged in the cooling water tank, and the drain pipe is connected with a water pump; a flow meter three is arranged in the drain pipe;

[0010] The two liquid level monitoring assemblies are used for monitoring the water level in the cooling water tank, and the liquid level monitoring assemblies are connected with electromagnetic relays; the electromagnetic relays are connected with a remote CC-LINK device, and the remote CC-LINK device is connected with a PLC control unit; the PLC control unit is connected with a man-machine dialogue device; the PLC control unit adopts "and" / "or" logic to judge whether both of the liquid level monitoring assemblies are triggered, and if so, an alarm is given through the man-machine dialogue device; any one triggering gives a pre-warning through the man-machine dialogue device.

[0011] The flow meter one, the flow meter two and the flow meter three are connected with the PLC control unit, and a diagnosis program is built in the PLC control unit to diagnose the root cause of the triggering alarm or pre-warning state according to the monitoring values of the flow meter one, the flow meter two and the flow meter three.

[0012] Further, the bottom end of the cooling water tank is inclined, a drain pipe is arranged at the inclined bottom end of the cooling water tank, and an electromagnetic valve two is installed in the drain pipe; the water pump and the electromagnetic valve one and the electromagnetic valve two are connected with the PLC control unit, and the opening and closing of the water pump and the electromagnetic valve one and the electromagnetic valve two are controlled by the PLC control unit.

[0013] Further, the man-machine dialogue device includes an alarm and a touch screen, and the PLC control unit is further connected with indicator lights; the indicator lights include a power indicator light, a running indicator light, a high liquid level indicator light and a low liquid level indicator light.

[0014] Further, the liquid level monitoring assembly includes a liquid level float ball switch, an outer sheath pipe, a cleaning cover, a mounting plate, a fixing assembly and a cleaning channel; the bottom end of the mounting plate is fixed with the outer sheath pipe, and the bottom end of the outer sheath pipe is of an open structure; the inner part of the outer sheath pipe is provided with the liquid level float ball switch; the side of the outer sheath pipe is provided with the fixing assembly, which is used for fixing the liquid level monitoring assembly on the surface of the cover plate; the inner part of the outer sheath pipe is provided with the cleaning cover, which is sleeved on the outer side of the liquid level float ball switch; the inner part of the cleaning cover is provided with the cleaning channel, and the cleaning channel is communicated with an external pipe.

[0015] Further, the cleaning channel adopts an inclined structure, and the cleaning channels are arranged in a ring array and are in communication with each other.

[0016] Further, the fixing assembly comprises a pressing block, a connecting plate, a baffle and a spring; the outer sheath pipe adopts a sandwich structure, and the sandwich structure is provided with a spring; one end of the spring is connected with the connecting plate, one end of the side portion of the connecting plate is connected with the pressing block, and the other end of the side portion of the connecting plate is connected with the baffle.

[0017] Further, the cross section of the pressing block adopts a rectangular structure, and the cross section of the baffle adopts a triangular structure; the length of the pressing block is greater than the length of the baffle.

[0018] Further, the inside of the cooling water tank is provided with a cleaning assembly, the cleaning assembly comprises a motor, a driving gear, a first plate tooth, an outer frame, a first brush and a second plate tooth; the outer frame is rotatably connected in the cooling water tank, and the outer frame adopts a structure that the two ends are circular rings and the middle is connected by a vertical rod; the first brush is arranged at the vertical rod of the outer frame and opposite to the inner wall of the cooling water tank; the first plate tooth is arranged at the top circular ring of the outer frame and connected with the driving gear; the driving gear is connected with the motor; the second plate tooth is arranged at the bottom circular ring of the outer frame.

[0019] Further, the second plate tooth is connected with a cleaning assembly, the cleaning assembly comprises a driven gear, a rotating shaft, a support rod, a linkage rod, a sliding block, a swing rod and a second brush; the second plate tooth is engaged with the driven gear, and the center of the driven gear is connected with the rotating shaft; the rotating shaft is installed on the side portion of the support rod, and the rotating shaft is rotatably connected with the support rod; the other end of the rotating shaft is connected with the linkage rod, and the other end of the linkage rod is rotatably connected with the sliding block; the sliding block is slidably connected with a sliding groove on the outside of the swing rod, and the other end of the swing rod is rotatably connected with the cooling water tank; the side portion of the swing rod is provided with the second brush.

[0020] A cooling liquid overflow detection method, comprising:

[0021] S1, monitoring the water level height in the cooling water tank through the liquid level float ball switches in the two liquid level monitoring assemblies; the trigger signal of the liquid level float ball switches is sent to the electromagnetic relay, and the signal is transmitted to the PLC control unit through the remote CC-LINK device;

[0022] S2, the PLC control unit receives the signal and judges the state of the two liquid level float ball switches using the "and" / "or" logic:

[0023] If any one of the liquid level float ball switches is triggered, the PLC control unit determines that it is in a pre-warning state, and sends a pre-warning instruction to the man-machine dialogue device;

[0024] If both liquid level float ball switches are triggered, the PLC control unit determines that it is an alarm state and sends an alarm instruction to the man-machine dialogue device;

[0025] S3, after the man-machine dialogue device receives the instruction, the corresponding level of sound and light warning is issued through the alarm of the man-machine dialogue device, and the pre-warning or alarm information is displayed on the touch screen of the man-machine dialogue device;

[0026] S4, the flow meter one, the flow meter two and the flow meter three monitor the flow data in the overflow pipe, the water inlet pipe and the drain pipe in real time, and send the data to the PLC control unit;

[0027] S5, the PLC control unit runs the built-in diagnostic program, and based on the value combination relationship of the three flow meters, the root cause of triggering the alarm or the pre-warning is diagnosed;

[0028] S6, the PLC control unit generates a control instruction according to the liquid level state and the diagnosis result:

[0029] The opening and closing of the electromagnetic valve one is controlled to realize automatic water replenishment or stop of the cooling water tank;

[0030] The start and stop of the water pump are controlled to supply or stop the supply of the coolant.

[0031] Compared with the prior art, the beneficial effects of the present application include:

[0032] The present application realizes redundancy design by setting two liquid level monitoring components and using the "and" / "or" logic of PLC, effectively avoids system malfunction or refusal caused by single sensor failure, and improves the reliability and accuracy of monitoring. The hierarchical pre-warning (pre-warning / alarm) mechanism facilitates the operator to distinguish the emergency degree of the event and intervene in advance. By integrating the flow meter one, the flow meter two and the flow meter three, and using the built-in diagnostic program of the PLC to analyze the flow data combination, the system can automatically diagnose the root cause of "water inlet valve failure", "overflow pipe blockage" or "water pump abnormality", and display the result directly on the man-machine dialogue interface. This greatly shortens the troubleshooting time of maintenance personnel, reduces the unplanned downtime, and improves the production efficiency.

[0033] The unique cleaning cover and cleaning channel design of the present application can automatically flush the liquid level float ball switch regularly through an external air or water source, prevent dirt from adhering, ensure the long-term monitoring sensitivity and accuracy, and reduce the frequency and intensity of manual cleaning. The design of the cleaning assembly and the cleaning assembly can automatically brush the inner wall and inclined bottom of the cooling water tank through the motor-driven brush one and brush two, and combined with the inclined bottom plate and the drain pipe controlled by the electromagnetic valve two, the sediment can be automatically discharged regularly, completely solving the water tank internal cleaning problem and maintaining the cleanliness of the coolant.

[0034] The application can be seamlessly integrated into the automatic network of the whole factory by connecting PLC through remote CC-LINK devices, remote monitoring and centralized management of data are realized, the development trend of industry 4.0 and intelligent factory is met, and the intelligent level of production management is improved.

[0035] To sum up, the application not only effectively solves the problem of cooling liquid overflow, but also realizes the leap from passive alarm to active early warning, from manual troubleshooting to intelligent diagnosis, from manual cleaning to automatic maintenance through a series of innovative designs, and comprehensively improves the automation degree, operation reliability and comprehensive economic benefit of the TFT-LCD glass substrate grinding production line. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0037] Figure 1 It is a structure schematic diagram of the cooling liquid overflow detection system of the application;

[0038] Figure 2 It is a structure schematic diagram of A in the application; Figure 1

[0039] Figure 3 It is a structure schematic diagram of the cleaning cover of the embodiment of the application;

[0040] Figure 4 It is a structure schematic diagram of B in the embodiment of the application; Figure 1

[0041] Figure 5 It is a system block diagram of the control system of the application;

[0042] ​​As shown in the figure: 100, cooling water tank; 101, cover plate; 200, overflow pipe; 201, flowmeter one; 300, water inlet pipe; 301, electromagnetic valve one; 302, flowmeter two; 400, liquid level monitoring assembly; 401, liquid level float switch; 402, outer sheath pipe; 403, cleaning cover; 404, mounting plate; 405, pressing block; 406, connecting plate; 407, baffle; 408, spring; 409, cleaning channel; 500, cleaning assembly; 501, motor; 502, driving gear; 503, plate tooth one; 504, outer frame; 505, brush one; 506, plate tooth two; 600, cleaning assembly; 601, driven gear; 602, rotating shaft; 603, support rod; 604, linkage rod; 605, sliding block; 606, swing rod; 607, brush two; 700, drain pipe; 701, flowmeter three; 702, water pump; 800, blowdown pipe; 801, electromagnetic valve two. DETAILED DESCRIPTION

[0043] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] The present application provides a cooling liquid overflow detection system and method, as shown in the figure, comprising: Figures 1-5 As shown in the figure, comprising:

[0045] The cooling water tank 100 is provided with a cover plate 101 at the top end, and two liquid level monitoring assemblies 400 are detachably connected in the cooling water tank 100; the two liquid level monitoring assemblies 400 are the same in structure, the side of the cooling water tank 100 is provided with a water inlet pipe 300, the water inlet pipe 300 is provided with an electromagnetic valve one 301 and a flowmeter two 302, the electromagnetic valve one 301 is used for controlling water inlet of the water inlet pipe 300, and the flowmeter two 302 is used for monitoring the amount of water inlet; the side of the cooling water tank 100 is provided with an overflow pipe 200, the inside of the overflow pipe 200 is provided with a flowmeter one 201, and the flowmeter one 201 is used for monitoring the amount of overflow of the overflow pipe 200; the inside of the cooling water tank 100 is provided with a drain pipe 700, and the drain pipe 700 is connected with a water pump 702; the inside of the drain pipe 700 is provided with a flowmeter three 701, and the flowmeter three 701 is used for recording the amount of discharge of the drain pipe 700;

[0046] Two liquid level monitoring components 400 are used to monitor the water level in the cooling water tank 100, and the liquid level monitoring components 400 are connected to electromagnetic relays; the electromagnetic relays are connected to a remote CC-LINK device, and the remote CC-LINK device is connected to a PLC control unit; the PLC control unit is connected to a man-machine dialogue device; the PLC control unit uses "and" / "or" logic to determine whether both liquid level monitoring components 400 are triggered, and if so, an alarm is given through the man-machine dialogue device; any one trigger gives a warning through the man-machine dialogue device; this greatly improves the reliability and fault tolerance of the system, and avoids system failure caused by single point failure, which is a significant progress in critical industrial processes. The man-machine dialogue device includes an alarm and a touch screen, and the PLC control unit is also connected to an indicator light; the indicator light includes a power indicator light, a running indicator light, a high liquid level indicator light, and a low liquid level indicator light.

[0047] The flow meter one 201, the flow meter two 302, and the flow meter three 701 are connected to the PLC control unit, and a built-in diagnostic program in the PLC control unit diagnoses the root cause of the trigger alarm or warning state according to the monitoring values of the flow meter one 201, the flow meter two 302, and the flow meter three 701. When the system is in a warning state, the PLC control unit starts the diagnostic program simultaneously. For example, if a liquid level warning is detected and the flow meter two 302 shows continuous water inflow (the electromagnetic valve one 301 command is closed), the PLC can diagnose "water inflow electromagnetic valve fault jamming" in advance and issue a warning, prompting the operator to intervene before the liquid level high alarm occurs, realizing the leap from passive alarm to active warning.

[0048] For example, when the liquid level high alarm occurs, if the liquid inflow flow meter two 302 > 0, the overflow flow meter one 201 ≈ 0, and the drain pipe 700 is not started, then the flow meter three 701 ≈ 0, which is judged as "overflow pipe blockage", at this time the overflow pipe 200 can be dredged by draining through the drain pipe 700 or closing the electromagnetic valve one 301.

[0049] When the liquid level high alarm occurs, if the liquid inflow flow meter two 302 > 0 and the overflow flow meter one 201 > 0, and the drain pipe 700 is not started, then the flow meter three 701 ≈ 0, but the liquid level is still rising, which is judged as "excessive liquid inflow and insufficient overflow capacity". At this time, the overflow pipe 200 can be dredged by draining through the drain pipe 700 or reducing the liquid inflow.

[0050] When the liquid level is normal, if the liquid inflow flow meter two 302 > 0 (and the electromagnetic valve command is closed), it is judged as "water inflow electromagnetic valve internal leakage / fault".

[0051] The system can directly display the diagnostic results on the touch screen, such as "alarm reason: overflow pipe blockage", which greatly shortens the maintenance time.

[0052] The design of multiple flow meters gives the system diagnostic capabilities, not only to find symptoms, but also to locate the cause, which is a significant step in intelligence.

[0053] The liquid level monitoring assembly 400 adopts a detachable structure, specifically, the liquid level monitoring assembly 400 comprises a liquid level float ball switch 401, an outer sheath pipe 402, a cleaning cover 403, a mounting plate 404, a fixing assembly and a cleaning channel 409; the bottom end of the mounting plate 404 is fixed with the outer sheath pipe 402, and the bottom end of the outer sheath pipe 402 is of an open structure; the outer sheath pipe 402 can preliminarily isolate the liquid level float ball switch 401 from external impurities, so as to avoid the influence of impurities on the sensitivity of the liquid level float ball switch 401; the inner part of the outer sheath pipe 402 is provided with the liquid level float ball switch 401; the side part of the outer sheath pipe 402 is provided with the fixing assembly, which is used for fixing the liquid level monitoring assembly 400 on the surface of the cover plate 101; the inner part of the outer sheath pipe 402 is provided with the cleaning cover 403, which is sleeved outside the liquid level float ball switch 401; the inner part of the cleaning cover 403 is provided with the cleaning channel 409, which is communicated with an external pipe. The cleaning channel 409 adopts an inclined structure, and a plurality of cleaning channels 409 are arranged in an annular array and communicated with each other. By connecting the cleaning liquid through the external pipe, the outer surface of the liquid level float ball switch 401 can be cleaned when needed, so as to improve the sensitivity of the liquid level float ball switch 401.

[0054] The fixing assembly comprises a pressing block 405, a connecting plate 406, a baffle 407 and a spring 408; the outer sheath pipe 402 adopts a sandwich structure, and the sandwich structure is provided with the spring 408; one end of the spring 408 is connected with the connecting plate 406, one end of the side part of the connecting plate 406 is connected with the pressing block 405, and the other end of the side part of the connecting plate 406 is connected with the baffle 407. The cross section of the pressing block 405 adopts a rectangular structure, and the cross section of the baffle 407 adopts a triangular structure; the length of the pressing block 405 is greater than the length of the baffle 407. When installing the liquid level monitoring assembly 400, only the whole liquid level monitoring assembly 400 needs to be aligned with the hole on the surface of the cover plate 101 and inserted, until the baffle 407 is pressed, the spring 408 is compressed, and the baffle 407 continues to extend into the cooling water tank 100; at this time, the baffle 407 is reset under the action of the spring 408, and the baffle 407 and the pressing block 405 are clamped at both ends of the cover plate 101, thereby completing the installation of the whole liquid level monitoring assembly 400.

[0055] In order to clean the cooling water tank 100, and discharge the clean liquid; the bottom end of the cooling water tank 100 is inclined, and a drain pipe 800 is arranged at the inclined bottom end of the cooling water tank 100, and an electromagnetic valve two 801 is arranged in the drain pipe 800; the water pump 702 and the electromagnetic valve one 301 and the electromagnetic valve two 801 are connected with a PLC control unit, and the opening and closing of the water pump 702 and the electromagnetic valve one 301 and the electromagnetic valve two 801 are controlled by the PLC control unit.

[0056] In order to realize the overall cleaning of the cooling water tank 100, a cleaning assembly 500 is arranged in the cooling water tank 100, the cleaning assembly 500 comprises a motor 501, a driving gear 502, a plate tooth one 503, an outer frame 504, a brush one 505 and a plate tooth two 506; the outer frame 504 is rotatably connected in the cooling water tank 100, and the outer frame 504 adopts a structure that the two ends are circular rings and the middle part is connected by a vertical rod; the brush one 505 is arranged at the vertical rod of the outer frame 504 and opposite to the inner wall of the cooling water tank 100; the plate tooth one 503 is arranged at the top end circular ring of the outer frame 504, and the plate tooth one 503 is connected with the driving gear 502; the driving gear 502 is connected with the motor 501; the plate tooth two 506 is arranged at the bottom end circular ring of the outer frame 504. When the motor 501 is started, the motor 501 drives the driving gear 502 to rotate, and then drives the whole outer frame 504 to rotate, and the brush one 505 is used to clean the inner wall of the cooling water tank 100.

[0057] In order to realize the synchronous cleaning of the bottom end of the cooling water tank 100, the plate tooth two 506 is connected with a cleaning assembly 600, the cleaning assembly 600 comprises a driven gear 601, a rotating shaft 602, a support rod 603, a linkage rod 604, a sliding block 605, a swing rod 606 and a brush two 607; the plate tooth two 506 is engaged with the driven gear 601, and the center of the driven gear 601 is connected with the rotating shaft 602; the rotating shaft 602 is arranged on the side of the support rod 603, and the rotating shaft 602 is rotatably connected with the support rod 603; the other end of the rotating shaft 602 is connected with the linkage rod 604, and the other end of the linkage rod 604 is rotatably connected with the sliding block 605; the sliding block 605 is slidably connected with the sliding groove outside the swing rod 606, and the other end of the swing rod 606 is rotatably connected with the cooling water tank 100; the side of the swing rod 606 is provided with the brush two 607. When the motor 501 is started, the rotation of the outer frame 504 synchronously drives the rotation of the driven gear 601, the rotation of the driven gear 601 drives the rotation of the linkage rod 604, the rotation of the linkage rod 604 pulls the sliding block 605 to slide on the surface of the swing rod 606, and at the same time, the swing rod 606 swings, and the brush two 607 at the bottom end of the swing rod 606 cleans the bottom end of the cooling water tank 100.

[0058] In use of the present application, firstly, the installation of the liquid level monitoring assembly 400 is carried out, only the whole liquid level monitoring assembly 400 is inserted into the hole on the surface of the cover plate 101, the baffle 407 is inserted, the spring 408 is compressed, until the baffle 407 continues to extend into the cooling water tank 100, at this time the baffle 407 resets under the action of the spring 408, the baffle 407 is clamped with the pressing block 405 at both ends of the cover plate 101, and the installation of the whole liquid level monitoring assembly 400 is completed.

[0059] The water level in the cooling water tank 100 is monitored by the two liquid level monitoring assemblies 400, the PLC control unit adopts the "and" / "or" logic to judge whether both of the liquid level monitoring assemblies 400 are triggered, and if so, the alarm is given through the man-machine dialogue device; any one triggers the early warning through the man-machine dialogue device; at the same time, the PLC control unit has a built-in diagnosis program to diagnose the root cause of the triggered alarm or early warning state according to the monitoring values of the flow meter one 201, the flow meter two 302 and the flow meter three 701.

[0060] When the cooling water tank 100 is cleaned, the cleaning liquid is connected through the external pipe, and the outer surface of the liquid level float ball switch 401 can be cleaned when needed to improve the sensitivity of the liquid level float ball switch 401. The motor 501 is started, when the motor 501 is started, the driving gear 502 is rotated, and the whole outer frame 504 is rotated, and the inner wall of the cooling water tank 100 is cleaned by the brush one 505. When the motor 501 is started, the outer frame 504 rotates, the driven gear 601 rotates, the linkage rod 604 rotates, the linkage rod 604 pulls the sliding block 605 to slide on the surface of the swing rod 606, and at the same time, the swing rod 606 swings, so that the brush two 607 at the bottom end of the swing rod 606 cleans the bottom end of the cooling water tank 100.

[0061] The present application also provides a cooling liquid overflow detection method, comprising:

[0062] S1, the water level in the cooling water tank 100 is monitored by the liquid level float ball switch 401 in the two liquid level monitoring assemblies 400; the trigger signal of the liquid level float ball switch 401 is sent to the electromagnetic relay, and the signal is transmitted to the PLC control unit through the remote CC-LINK device;

[0063] S2, the PLC control unit receives the signal, and judges the state of the two liquid level float ball switches 401 by using the "and" / "or" logic:

[0064] If any one of the liquid level float ball switches 401 triggers, the PLC control unit determines that it is in an early warning state, and sends an early warning instruction to the man-machine dialogue device;

[0065] If both liquid level float ball switches 401 are triggered, the PLC control unit determines that it is in an alarm state and sends an alarm instruction to the man-machine dialogue device;

[0066] S3, after receiving the instruction, the man-machine dialogue device issues a corresponding level of sound and light warning through its alarm, and displays the pre-warning or alarm information on its touch screen;

[0067] S4, the flow meter 201, the flow meter 302 and the flow meter 701 monitor the flow data in the overflow pipe 200, the water inlet pipe 300 and the drain pipe 700 in real time, and send the data to the PLC control unit;

[0068] S5, the PLC control unit runs the built-in diagnostic program, and based on the numerical combination relationship of the three flow meters, diagnoses the root cause of triggering the alarm or pre-warning;

[0069] S6, the PLC control unit generates a control instruction according to the liquid level state and the diagnosis result:

[0070] Control the opening and closing of the electromagnetic valve 301 to realize automatic water replenishment or stop water replenishment of the cooling water tank 100;

[0071] Control the start and stop of the water pump 702 to supply or stop supplying the coolant.

[0072] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of the examples have been described in the above description in general terms. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present disclosure.

[0073] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0074] In several embodiments provided herein, it should be understood that the disclosed system, apparatus and method can be implemented in other manners. For example, the apparatus embodiments described above are merely schematic, and the division of units is merely logical function division, and there can be other division manners in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be electric, mechanical or other forms.

[0075] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they can be located in one place or distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments provided herein.

[0076] In addition, each functional unit in each embodiment herein can be integrated into a processing unit, or each unit can be physically present separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0077] The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, the technical solutions herein, essentially or in the form of a contribution to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment herein. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, and various other media that can store program codes.

[0078] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0079] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A coolant overflow detection system, characterized in that, include A cooling water tank (100) is provided with a cover plate (101) at the top and two liquid level monitoring components (400) are detachably connected inside the cooling water tank (100); a water inlet pipe (300) is provided on the side of the cooling water tank (100), and a solenoid valve (301) and a flow meter (302) are installed inside the water inlet pipe (300); an overflow pipe (200) is provided on the side of the cooling water tank (100), and a flow meter (201) is installed inside the overflow pipe (200); a drain pipe (700) is provided inside the cooling water tank (100), and the drain pipe (700) is connected to a water pump (702); a flow meter (701) is provided inside the drain pipe (700). Two liquid level monitoring components (400) are used to monitor the water level in the cooling water tank (100), and the liquid level monitoring components (400) are connected to electromagnetic relays; the electromagnetic relays are connected to a remote CC-LINK device, and the remote CC-LINK device is connected to a PLC control unit; the PLC control unit is connected to a human-machine interface device; the PLC control unit uses "AND" / "OR" logic to determine whether both liquid level monitoring components (400) are triggered, and if so, an alarm is triggered through the human-machine interface device; if either is triggered, a warning is triggered through the human-machine interface device. The flow meter 1 (201), flow meter 2 (302) and flow meter 3 (701) are connected to the PLC control unit. The PLC control unit has a built-in diagnostic program that diagnoses the root cause of the alarm or warning state based on the monitoring values ​​of the flow meter 1 (201), flow meter 2 (302) and flow meter 3 (701).

2. The coolant overflow detection system according to claim 1, characterized in that: The bottom of the cooling water tank (100) is inclined, and a drain pipe (800) is opened at the inclined bottom of the cooling water tank (100). A second solenoid valve (801) is installed in the drain pipe (800). The water pump (702) and the first solenoid valve (301) and the second solenoid valve (801) are connected to a PLC control unit, and the opening and closing of the water pump (702) and the first solenoid valve (301) and the second solenoid valve (801) are controlled by the PLC control unit.

3. The coolant overflow detection system according to claim 1, characterized in that: The human-machine interface device includes an alarm and a touch screen, and the PLC control unit is also connected to indicator lights; the indicator lights include a power indicator light, a running indicator light, a high liquid level indicator light, and a low liquid level indicator light.

4. The coolant overflow detection system according to claim 1, characterized in that: The liquid level monitoring component (400) includes a liquid level float switch (401), an outer sheath (402), a cleaning cover (403), a mounting plate (404), a fixing component, and a cleaning channel (409). The bottom end of the mounting plate (404) is fixed to the outer sheath (402), and the bottom end of the outer sheath (402) is an open structure. The liquid level float switch (401) is provided inside the outer sheath (402). The fixing component is provided on the side of the outer sheath (402), and the fixing component is used to fix the liquid level monitoring component (400) to the surface of the cover plate (101). The cleaning cover (403) is provided inside the outer sheath (402), and the cleaning cover (403) is sleeved on the outside of the liquid level float switch (401). A cleaning channel (409) is opened inside the cleaning cover (403), and the cleaning channel (409) is connected to the outer pipe.

5. The coolant overflow detection system according to claim 4, characterized in that: The cleaning channel (409) adopts an inclined structure, and multiple cleaning channels (409) are arranged in a ring array and are interconnected.

6. The coolant overflow detection system according to claim 5, characterized in that: The fixing component includes a pressing block (405), a connecting plate (406), a baffle (407), and a spring (408); the outer sheath (402) adopts a sandwich structure, and the spring (408) is provided inside the sandwich structure; one end of the spring (408) is connected to the connecting plate (406), one side of the connecting plate (406) is connected to the pressing block (405), and the other side of the connecting plate (406) is connected to the baffle (407).

7. The coolant overflow detection system according to claim 6, characterized in that: The pressing block (405) has a rectangular cross-section, and the baffle (407) has a triangular cross-section; the length of the pressing block (405) is greater than the length of the baffle (407).

8. The coolant overflow detection system according to claim 1, characterized in that: The cooling water tank (100) is equipped with a cleaning assembly (500), which includes a motor (501), a drive gear (502), a first gear plate (503), an outer frame (504), a first brush (505), and a second gear plate (506). The outer frame (504) is rotatably connected inside the cooling water tank (100), and the outer frame (504) has a structure with two circular rings at both ends and connected by a vertical rod in the middle. The first brush plate (505) is provided on the side of the vertical rod of the outer frame (504) opposite to the inner wall of the cooling water tank (100). The first gear plate (503) is provided at the top circular ring of the outer frame (504), and the first gear plate (503) is connected to the drive gear (502). The drive gear (502) is connected to the motor (501). The second gear plate (506) is provided at the bottom circular ring of the outer frame (504).

9. The coolant overflow detection system according to claim 8, characterized in that: The second toothed plate (506) is connected to the cleaning assembly (600), which includes a driven gear (601), a rotating shaft (602), a support rod (603), a linkage rod (604), a slider (605), a rocker arm (606), and a second brush (607). The second toothed plate (506) meshes with the driven gear (601), and the rotating shaft (602) is connected to the center of the driven gear (601). The rotating shaft (602) is mounted on the support rod (603). 3) On the side, the rotating shaft (602) is rotatably connected to the support rod (603); the other end of the rotating shaft (602) is connected to the linkage rod (604), and the other end of the linkage rod (604) is rotatably connected to the slider (605); the slider (605) is slidably connected to the groove on the outside of the rocker arm (606), and the other end of the rocker arm (606) is rotatably connected to the cooling water tank (100); the side of the rocker arm (606) is provided with a second brush (607).

10. A method for detecting coolant overflow, characterized in that, include: S1. The water level in the cooling water tank (100) is monitored by the level float switch (401) in the two level monitoring components (400); the trigger signal of the level float switch (401) is sent to the electromagnetic relay and the signal is transmitted to the PLC control unit through the remote CC-LINK device. S2, the PLC control unit receives the signal and uses "AND" / "OR" logic to determine the status of the two liquid level float switches (401): If any level float switch (401) is triggered, the PLC control unit determines that it is in a warning state and sends a warning command to the human-machine interface device; If both level float switches (401) are triggered, the PLC control unit determines that an alarm state is being triggered and sends an alarm command to the human-machine interface device. S3. After receiving the instruction, the human-machine dialogue device will issue an audible and visual warning of the corresponding level through its alarm, and at the same time display the warning or alarm information on its touch screen. S4. Flow meter 1 (201), flow meter 2 (302) and flow meter 3 (701) monitor the flow data in the overflow pipe (200), inlet pipe (300) and drain pipe (700) in real time and send the data to the PLC control unit. The S5 and PLC control units run built-in diagnostic programs to diagnose the root cause of alarms or warnings based on the numerical combination relationship of the three flow meters. S6, the PLC control unit generates control commands based on the liquid level status and diagnostic results: The opening and closing of the solenoid valve 1 (301) is controlled to automatically replenish or stop replenishing water to the cooling water tank (100); Control the start and stop of the water pump (702) to supply or stop the supply of coolant.

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