Automatic machine tool cooling liquid supplementing device based on liquid level sensor

Abstract

The invention discloses an automatic machine tool cooling liquid supplementing device based on a liquid level sensor, which is applied to the technical field of automatic machine tool cooling liquid supplementing and comprises a liquid supplementing mechanism and a liquid level detection mechanism, the liquid level detection mechanism is arranged on one side of the liquid supplementing mechanism, and the liquid level detection mechanism is in pipeline connection with the liquid supplementing mechanism; the liquid supplementing mechanism comprises a machine body, a control cabinet and a four-way pipe, and the control cabinet is in signal connection with a liquid supplementing system; the liquid level detection mechanism comprises a circulating box, a fifth liquid supplementing pump, a liquid level sensor, a buffering assembly and a cleaning assembly, the buffering assembly and the cleaning assembly are both located in the fine filtrate area, and a concentration sensor is fixedly connected to the interior of the circulating box; the buffer assembly comprises two sets of limiting blocks and a plurality of fan wheels, the cleaning assembly comprises an air cylinder, a cleaning rod and a motor, the bottom of the cleaning rod is arranged to be in a semicircular shape matched with the radius of a floating ball of the liquid level sensor, and automatic and accurate control over cooling liquid can be achieved.

Description

Technical Field

[0001] This invention relates to the field of automatic machine tool coolant replenishment technology, specifically to an automatic machine tool coolant replenishment device based on a liquid level sensor. Background Technology

[0002] As core equipment in modern manufacturing, CNC machine tools directly impact machining accuracy, efficiency, and production costs. During the cutting process, coolant plays a crucial role, primarily functioning to cool the cutting tool and workpiece, lubricate the cutting area, and clean and remove chips. If the coolant level is too low, insufficient cooling can lead to accelerated tool wear, decreased workpiece quality, and even equipment malfunctions such as coolant pump burnout. Therefore, an automatic coolant replenishment system is needed to maintain the coolant level within a reasonable range to ensure the stable operation of these functions.

[0003] Existing automatic coolant replenishment devices typically consist of a level sensor, a controller, a replenishment pump, and a storage tank. The level sensor monitors changes in the coolant level in real time and transmits the signal to the controller. The controller then controls the start and stop of the replenishment pump based on a set level range, thus achieving automatic coolant replenishment. However, the float-type level sensors commonly used in existing automatic coolant replenishment devices are easily affected by impurities, oil, or cutting debris in the coolant, which may lead to false alarms or missed alarms, reducing the reliability and accuracy of level detection.

[0004] Therefore, it is necessary to provide an automatic machine tool coolant replenishment device based on a liquid level sensor to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic coolant replenishment device for machine tools based on a liquid level sensor, which can realize automatic and precise control of coolant and improve the stability of coolant level during machine tool operation, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic machine tool coolant replenishment device based on a liquid level sensor, comprising a replenishment mechanism and a liquid level detection mechanism, wherein the liquid level detection mechanism is disposed on one side of the replenishment mechanism and the liquid level detection mechanism is connected to the replenishment mechanism via a pipeline; The fluid replenishment mechanism includes a machine body, a control cabinet, and a four-way pipe. The control cabinet is connected to a fluid replenishment system. The fluid replenishment system is used to acquire the level and concentration of the coolant during machine tool processing and the level of the liquid in each tank inside the machine body. After data analysis, it automatically adjusts the level and concentration of the coolant during machine tool processing. The liquid level detection mechanism includes a circulation tank, a fifth replenishment pump, a liquid level sensor, a buffer assembly, and a cleaning assembly. The buffer assembly and the cleaning assembly are both located in the fine filtrate area. A concentration sensor is fixedly connected inside the circulation tank. The buffer assembly includes two sets of limiting blocks and several fan wheels. The cleaning assembly includes a cylinder, a cleaning rod, and a motor. The bottom of the cleaning rod is set to a semi-circle that matches the radius of the float ball of the liquid level sensor.

[0007] According to the above technical solution, the control cabinet is located on the top of the machine body, and the control cabinet is equipped with a cabinet door. The cabinet door is equipped with a human-machine interface and a display instrument. The human-machine interface is electrically connected to the display instrument, the liquid replenishment mechanism, and the sensors inside the liquid level detection mechanism.

[0008] According to the above technical solution, a water tank, a mixing tank, and a stock solution tank are arranged side by side inside the machine body. Three sets of first replenishment pumps and fourth replenishment pumps are fixedly connected to the top of the machine body. The first replenishment pump is provided with a first inlet end and a first outlet end. The first inlet end of the first replenishment pump is connected to the replenishment liquid corresponding to the water tank, the mixing tank, and the stock solution tank, respectively. The first outlet ends of the three sets of first replenishment pumps are connected to the inside of the water tank, the mixing tank, and the stock solution tank, respectively. The water tank and the original liquid tank are respectively connected to the mixing tank via pipelines. A second replenishing pump is installed on the pipeline connecting the water tank and the mixing tank, and a third replenishing pump is installed on the pipeline connecting the original liquid tank and the mixing tank.

[0009] According to the above technical solution, the four-way pipe is provided with three second inlet ends and one second outlet end. The three second inlet ends of the four-way pipe are respectively connected to the water tank, the mixing tank, and the raw liquid tank pipeline. The second outlet end of the four-way pipe is connected to the fourth replenishment pump pipeline. A first valve is provided on the pipeline connecting the water tank and the second inlet end of the four-way pipe. A second valve is provided on the pipeline connecting the mixing tank and the second inlet end of the four-way pipe. A third valve is provided on the pipeline connecting the raw liquid tank and the second inlet end of the four-way pipe.

[0010] According to the above technical solution, a filter port is fixed on the top of the circulation tank, a coarse filter screen is detachably installed inside the filter port, and a fine filter screen is detachably installed inside the circulation tank. The fine filter screen divides the inside of the circulation tank into a coarse filtrate area and a fine filtrate area. The coarse filtrate area is located below the coarse filter screen, and the fine filtrate area is located on the side of the fine filter screen away from the coarse filtrate area. The circulation tank has a liquid inlet at the bottom side, which is located in the fine filtrate area and close to the fine filter screen. The liquid inlet is connected to the fourth replenishment pump. According to the above technical solution, the fifth replenishing pump is fixed on the top of the circulation tank, the fifth replenishing pump is located above the fine filtrate area, the fifth replenishing pump is provided with a third inlet end and a third outlet end, the third inlet end is located at the bottom of the fine filtrate area, and the third outlet end is connected to the machine tool coolant delivery pipeline. The liquid level sensor is fixed inside the circulation tank, and both the liquid level sensor and the concentration sensor are located in the fine filtrate area.

[0011] According to the above technical solution, the two sets of limiting blocks are respectively fixed to the top and bottom of the circulation box. The two sets of limiting blocks are respectively provided with a number of sliding grooves. The number of sliding grooves on the two sets of limiting blocks is the same and their positions correspond. A slider and two sets of springs are provided inside the sliding groove. The two sets of springs are respectively located on both sides of the slider. The ends of the two sets of springs near the slider are fixedly connected to the slider, and the other ends of the two sets of springs are fixedly connected to the limiting block. A rotating rod is fixedly connected to the top of the fan wheel. A number of second through slots are provided on the limiting block located at the top of the circulation box, and a first through slot is provided at the corresponding position on the top of the circulation box. The positions and numbers of the second through slots correspond to those of the sliding groove. The rotating rod passes through the first through slot and the second through slot in sequence and extends into the sliding groove. The number of fan wheels is the same as the number of sliding grooves on the same set of limit blocks and their positions correspond. The two ends of the fan wheels are respectively connected to the slider bearings on the two sets of limit blocks.

[0012] According to the above technical solution, a fixing block is fixedly connected to the top of the circulation box, the cylinder is fixed to the side of the fixing block, a stop block is fixedly connected to the output end of the cylinder, a first magnetic element is provided on the stop block, a fixing groove is fixedly connected to the top of the inside of the circulation box, a locking block is slidably arranged inside the fixing groove, and the cleaning rod is fixed to the bottom of the locking block. According to the above technical solution, a fixed base is fixedly connected to the bottom of the circulation tank. The fixed base is located around the liquid level sensor. A rotating base is rotatably connected to the fixed base. A slot is provided on the rotating base. The slot matches the shape and size of the card block. A limiting groove is provided on the top of the card block. The two ends of the limiting groove are open. A limiting protrusion is fixedly connected to the top of the fixed base. According to the above technical solution, the motor is fixed to the top of the circulation box, and the output end of the motor is connected to the top bevel gear of the rotating seat. Both the circulation box and the fixed seat are provided with drive slots, and the drive slots are located at the transmission point between the motor output end and the top bevel gear of the rotating seat.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention, through the design of setting a buffer component, can effectively reduce the impact of liquid on the fine filter liquid area during replenishment, avoid the direct impact of high-speed liquid flow on the liquid level sensor and concentration sensor, protect the precision sensor, prevent detection interference caused by violent liquid surface fluctuations, improve the stability and durability of the system, and at the same time, the rotation of the fan wheel can not only buffer and agitate, but also drive the liquid to backwash the fine filter screen, effectively delay the clogging speed of the fine filter screen, reduce the frequency of downtime cleaning, and reduce maintenance intensity and time costs; By incorporating a cleaning component, the float of the liquid level sensor can be automatically cleaned to prevent oil and debris from adhering, ensuring the long-term accuracy and reliability of the liquid level detection data and avoiding system malfunctions caused by sensor false alarms. At the same time, when the cleaning rod is used to fix the position of the float, abnormal fluctuations in the liquid level can be used to realize a simple self-test function. By setting up a replenishment system, it is possible to determine whether replenishment is needed based on the detected actual liquid level and concentration deviation, and to calculate the amount of stock solution or water required for replenishment. The system can then precisely add the liquid by controlling the opening and closing of valves, ensuring that the coolant concentration in the processing area remains stable within the optimal process range, directly improving processing quality and tool life. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial rear view schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the pipeline connection of the fluid replenishment mechanism of the present invention; Figure 4 This is a cross-sectional schematic diagram of the liquid level detection mechanism of the present invention; Figure 5 This is a top view schematic diagram of the liquid level detection mechanism of the present invention; Figure 6 This is a top cross-sectional view of the liquid level detection mechanism of the present invention; Figure 7 This is the invention Figure 4 Enlarged structural diagram of region A in the middle; Figure 8 This is the invention Figure 4 Enlarged structural diagram of region B in the middle; In the diagram: 1. Liquid replenishment mechanism; 11. Main body; 12. Control cabinet; 13. Human-machine interface; 14. Display instrument; 15. Water tank; 16. Mixing tank; 17. Stock solution tank; 18. First liquid replenishment pump; 19. Second liquid replenishment pump; 110. Third liquid replenishment pump; 111. First valve; 112. Second valve; 113. Third valve; 114. Four-way pipe; 115. Fourth liquid replenishment pump; 2. Liquid level detection mechanism; 21. Circulation tank; 22. Filter port; 23. Coarse filter screen; 24. Fine filter screen; 25. Fifth replenishment pump; 26. Liquid level sensor; 27. Liquid inlet; 28. First through-channel; 3. Buffer assembly; 31. Limiting block; 32. Slide groove; 33. Slider; 34. Fan wheel; 35. Spring; 36. Rotating rod; 4. Cleaning component; 41. Fixing block; 42. Cylinder; 43. Fixing groove; 44. Abutment block; 45. Locking block; 46. Cleaning rod; 47. Fixing seat; 48. Rotating seat; 49. Locking groove; 410. Limiting protrusion; 411. Limiting groove; 412. Motor; 413. Drive groove. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-8 The present invention provides a technical solution: an automatic machine tool coolant replenishment device based on a liquid level sensor, comprising a replenishment mechanism 1 and a liquid level detection mechanism 2. The liquid level detection mechanism 2 is disposed on one side of the replenishment mechanism 1 and is connected to the replenishment mechanism 1 by a pipeline. The liquid level detection mechanism 2 is used to filter the coolant during the machine tool processing and to detect the liquid level and concentration of the filtered coolant. The replenishment mechanism 1 is used to intelligently replenish the coolant and adjust the coolant concentration according to the detection results.

[0017] Specifically, such as Figures 1-3 As shown, the coolant replenishment mechanism 1 includes a body 11, a control cabinet 12, and a four-way pipe 114. The control cabinet 12 is located on the top of the body 11 and has a door. A human-machine interface 13 and a display instrument 14 are installed on the door. The human-machine interface 13 is electrically connected to the display instrument 14, the sensors inside the coolant replenishment mechanism 1, and the liquid level detection mechanism 2. The control cabinet 12 is connected to a coolant replenishment system. The coolant replenishment system is used to acquire the coolant level and concentration during machine tool processing and the liquid level in each tank inside the body 11. After data analysis, it automatically adjusts the coolant level and concentration during machine tool processing.

[0018] Furthermore, inside the body 11, a water tank 15, a mixing tank 16, and a stock solution tank 17 are arranged side by side. Three sets of first replenishment pumps 18 and fourth replenishment pumps 115 are fixedly connected to the top of the body 11. The first replenishment pump 18 is provided with a first inlet end and a first outlet end. The first inlet end of the first replenishment pump 18 is connected to the replenishment liquid corresponding to the water tank 15, the mixing tank 16, and the stock solution tank 17, respectively. The first outlet ends of the three sets of first replenishment pumps 18 are connected to the inside of the water tank 15, the mixing tank 16, and the stock solution tank 17, respectively. When the three sets of first replenishment pumps 18 are started, they can inject the replenishment liquid corresponding to the water tank 15, the mixing tank 16, and the stock solution tank 17 into their respective tanks, thereby replenishing the amount of liquid inside the water tank 15, the mixing tank 16, and the stock solution tank 17. Water tank 15 and raw liquid tank 17 are respectively connected to mixing tank 16 by pipeline. A second replenishing pump 19 is installed on the pipeline connecting water tank 15 and mixing tank 16, and a third replenishing pump 110 is installed on the pipeline connecting raw liquid tank 17 and mixing tank 16. By controlling the start, stop and flow rate of the second replenishing pump 19 and the third replenishing pump 110, the mixture can be automatically proportioned and formed to meet the concentration requirements inside mixing tank 16.

[0019] It should be noted that, Figure 3 The intermediate water tank 15 is used to store water, the mixing tank 16 is used to store a mixture of standard concentration coolant and water, and the stock solution tank 17 is used to store undiluted coolant stock solution. In actual use, the types of liquids actually stored in the water tank 15, mixing tank 16, and stock solution tank 17 can be adjusted according to actual needs.

[0020] The four-way pipe 114 has three second inlet ends and one second outlet end. The three second inlet ends of the four-way pipe 114 are respectively connected to the water tank 15, the mixing tank 16, and the raw liquid tank 17. The second outlet end of the four-way pipe 114 is connected to the fourth replenishment pump 115. A first valve 111 is installed on the pipe connecting the water tank 15 and the second inlet end of the four-way pipe 114. A second valve 112 is installed on the pipe connecting the mixing tank 16 and the second inlet end of the four-way pipe 114. A third valve 113 is installed on the pipe connecting the raw liquid tank 17 and the second inlet end of the four-way pipe 114. The first valve 111, the second valve 112, and the third valve 113 are respectively controlled to open. At the same time, the fourth replenishment pump 115 is started, which can pump the liquid inside the water tank 15, the mixing tank 16, and the raw liquid tank 17 into the liquid level detection mechanism 2, and adjust the liquid level and concentration of the coolant in the liquid level detection mechanism 2.

[0021] Specifically, such as Figures 4-8As shown, the liquid level detection mechanism 2 includes a circulation tank 21, a fifth replenishment pump 25, a liquid level sensor 26, a buffer assembly 3, and a cleaning assembly 4. A filter port 22 is fixed on the top of the circulation tank 21. A coarse filter screen 23 is detachably installed inside the filter port 22. A fine filter screen 24 is detachably installed inside the circulation tank 21. The fine filter screen 24 divides the inside of the circulation tank 21 into a coarse filtrate area and a fine filtrate area. The coarse filtrate area is located below the coarse filter screen 23, and the fine filtrate area is located on the side of the fine filter screen 24 away from the coarse filtrate area. The coarse filter screen 23 is used for preliminary coarse filtration of the coolant after machine tool processing, and the fine filter screen 24 is used for further fine filtration of the coolant. The buffer assembly 3 and the cleaning assembly 4 are both located in the fine filtrate area. The buffer assembly 3 is used to slow down the flow rate of the liquid entering the liquid level detection mechanism 2 from the replenishment mechanism 1, while promoting the flow of liquid in the fine filtrate area. It can also clean the fine filter screen 24. The cleaning assembly 4 is used to automatically clean the liquid level sensor 26 to ensure the accuracy of the liquid level detection result of the liquid level sensor 26. The bottom side of the circulation tank 21 is provided with a liquid inlet 27. The liquid inlet 27 is located in the fine filtrate area and close to the fine filter screen 24. The liquid inlet 27 is connected to the fourth replenishment pump 115. After the fourth replenishment pump 115 is started, it can pump the liquid inside the water tank 15, the mixing tank 16, and the original liquid tank 17 into the fine filtrate area of ​​the circulation tank 21. The fifth replenishing pump 25 is fixed on the top of the circulation tank 21. The fifth replenishing pump 25 is located above the fine filtrate zone. The fifth replenishing pump 25 is provided with a third inlet end and a third outlet end. The third inlet end is located at the bottom of the fine filtrate zone, and the third outlet end is connected to the machine tool coolant delivery pipeline. The liquid level sensor 26 is fixed inside the circulation tank 21. The liquid level sensor 26 is located in the fine filtrate area and is used to detect the liquid level of the coolant in the fine filtrate area. A concentration sensor is also fixedly connected inside the circulation tank 21. The concentration sensor is located in the fine filtrate zone and is used to detect the concentration of the coolant in the fine filtrate zone.

[0022] It should be noted that the concentration sensor is preferably an online refractometer with an automatic cleaning function.

[0023] Furthermore, such as Figures 4-7 As shown, the buffer assembly 3 includes two sets of limiting blocks 31 and several fan wheels 34. The two sets of limiting blocks 31 are fixed to the top and bottom of the circulation box 21 respectively. Several sliding grooves 32 are respectively provided on the two sets of limiting blocks 31. The number of sliding grooves 32 on the two sets of limiting blocks 31 is the same and their positions are corresponding. A slider 33 and two sets of springs 35 are provided inside the sliding groove 32. The two sets of springs 35 are located on both sides of the slider 33 respectively. The end of the two sets of springs 35 near the slider 33 is fixedly connected to the slider 33, and the other end of the two sets of springs 35 is fixedly connected to the limiting block 31. A rotating rod 36 is fixedly connected to the top of the fan wheel 34. A number of second through slots are provided on the limiting block 31 located at the top of the circulation box 21. A first through slot 28 is provided at the corresponding position on the top of the circulation box 21. The positions and numbers of the second through slots correspond to those of the sliding groove 32. The rotating rod 36 passes through the first through slot 28 and the second through slot in sequence and extends into the sliding groove 32. The number of fan wheels 34 is the same as the number of sliding grooves 32 on the same set of limit blocks 31 and their positions correspond. The two ends of the fan wheels 34 are respectively connected to the slider 33 bearings on the two sets of limit blocks 31.

[0024] It should be noted that the fan blades of the fan wheel 34 are set in an arc shape and bend towards the liquid inlet 27.

[0025] Supplementary explanation based on the above structure: Since the inlet 27 is located in the fine filtrate area and close to the fine filter screen 24, when the fourth replenishment pump 115 starts and pumps the liquid inside the water tank 15, mixing tank 16, and original liquid tank 17 into the fine filtrate area, the liquid will impact the blades of the fan wheel 34, causing the fan wheel 34 to drive the sliders 33 at both ends to move away from the inlet 27 in the slide groove 32. The spring 35 on the side of the slider 33 close to the inlet 27 is stretched, and the spring 35 on the side of the slider 33 away from the inlet 27 is compressed, so that the spring 35 can absorb part of the impact force of the liquid. The impact of the liquid entering the fine filtrate zone on the blades of the fan wheel 34 will also drive the fan wheel 34 to rotate, reducing the flow rate of the liquid entering the fine filtrate zone. This prevents the liquid from entering the fine filtrate zone at a high flow rate when the liquid level is low, which would impact the liquid level sensor 26 and affect its detection accuracy and service life. Since the inlet 27 is located at the bottom of the circulation tank 21, it can also promote the flow of coolant at the bottom of the fine filtrate zone. By rotating the fan wheel 34, it drives the flow of coolant in the middle and upper layers of the fine filtrate zone, thereby improving the uniformity of coolant inside the fine filtrate zone. In this process, the rotation of the fan wheel 34 and the flow of coolant in the middle and upper layers of the fine filtrate zone can also backwash the fine filter screen 24, realizing the self-cleaning of the fine filter screen 24. When the fine filter screen 24 is clogged, the liquid pressure generated by the rapid rise in the liquid level in the fine filtrate zone can also be used to reverse the action on the fine filter screen 24, flushing down the impurities accumulated in the coarse filtrate zone, increasing the time for the fine filter screen 24 to perform fine filtration at one time, and reducing the labor intensity of workers to clean the fine filter screen 24 frequently.

[0026] Furthermore, such as Figure 4 , Figure 7 and Figure 8As shown, the cleaning assembly 4 includes a cylinder 42, a cleaning rod 46, and a motor 412. A fixing block 41 is fixedly connected to the top of the circulation tank 21. The cylinder 42 is fixed to the side of the fixing block 41. A stop block 44 is fixedly connected to the output end of the cylinder 42. A first magnetic element is provided on the stop block 44. A fixing groove 43 is fixedly connected to the top of the inside of the circulation tank 21. A locking block 45 is slidably arranged inside the fixing groove 43. The cleaning rod 46 is fixed to the bottom of the locking block 45. The bottom of the cleaning rod 46 is set as a semi-circle matching the radius of the float ball of the liquid level sensor 26. The first magnetic element can change its magnetism when energized. The magnetic component that generates magnetism when energized is preferably a metal material that can be attracted by the magnetic component. Alternatively, a magnet can be fixed inside the block 45 so that the block 45 can be attracted by the first magnetic component. When the cylinder 42 starts to extend, the abutment 44 can push the block 45 in the fixing groove 43 to move closer to the liquid level sensor 26. Conversely, when the cylinder 42 starts to retract, the first magnetic component generates or changes its magnetism to attract the block 45, so that the abutment 44 attracts the block 45 and drives the block 45 in the fixing groove 43 to move away from the liquid level sensor 26. A fixed base 47 is fixedly connected to the bottom of the circulation tank 21. The fixed base 47 is located around the liquid level sensor 26. A rotating base 48 is rotatably connected to the fixed base 47. A slot 49 is provided on the rotating base 48. The slot 49 matches the shape and size of the block 45. A limiting groove 411 is provided on the top of the block 45. The two ends of the limiting groove 411 are open. A limiting protrusion 410 is fixedly connected to the top of the fixed base 47. The position and size of the limiting protrusion 410 match the limiting groove 411. The limiting protrusion 410 is notched at the slot 49. The limiting protrusion 410 is used to cooperate with the limiting groove 411 to limit the position of the block 45 and prevent the block 45 from falling off the rotating base 48. The motor 412 is fixed to the top of the circulation tank 21. The output end of the motor 412 is connected to the top bevel gear of the rotating seat 48. Both the circulation tank 21 and the fixed seat 47 are provided with drive slots 413. The drive slots 413 are located at the transmission point between the output end of the motor 412 and the top bevel gear of the rotating seat 48. When the motor 412 is started, it can drive the rotating seat 48 to rotate on the fixed seat 47 through the bevel gear transmission, thereby driving the cleaning rod 46 on the card block 45 to clean the float of the liquid level sensor 26.

[0027] Supplementary explanation based on the above structure: When the liquid level sensor 26 detects a low liquid level in the fine filtrate zone, the cylinder 42 extends, causing the stop block 44 to push the locking block 45 within the fixed groove 43 towards the side closer to the liquid level sensor 26, until the locking block 45 engages in the locking groove 49 on the rotating seat 48. At this time, the cleaning rod 46 contacts the float of the liquid level sensor 26. Then, the motor 412 starts, driving the rotating seat 48 to rotate via bevel gear transmission. The limiting protrusion 410 engages in the limiting groove 411, allowing the cleaning rod 46 to rotate and clean the liquid level sensor 26, removing any adhering substances. Simultaneously, since the semi-circular position on the cleaning rod 46 is fixed, when the cleaning rod 46 contacts the liquid level sensor 26, it can also forcibly limit the liquid level sensor 26. During this process, if the liquid level detected by the liquid level sensor 26 fluctuates significantly, the liquid level sensor 26 needs to be calibrated.

[0028] How the fluid replacement system operates: The replenishment system monitors the liquid levels inside the water tank 15, mixing tank 16, and stock solution tank 17. When the liquid level in the mixing tank 16 is less than the set level, the replenishment system controls the second replenishment pump 19 and the third replenishment pump 110 to start, injecting the liquid from the water tank 15 and stock solution tank 17 into the mixing tank 16, ensuring that the coolant in the mixing tank 16 reaches the standard concentration requirement. In other cases, the replenishment system issues an alarm, and the operator controls the corresponding first replenishment pump 18 to start and replenish the corresponding liquid. The parameters used in the replenishment system to determine the liquid levels in the water tank 15, mixing tank 16, and stock solution tank 17 need to be manually set.

[0029] The coolant replenishment system is equipped with a standard coolant concentration range for normal machine tool operation, a coolant level range inside the circulation tank 21, a single replenishment time threshold, and a replenishment time coefficient. The coolant concentration range is denoted as... , Minimum coolant concentration, The maximum coolant concentration is denoted as the liquid level range. , This is the minimum liquid level. When this level is reached, liquid needs to be replenished. The highest liquid level is reached, and replenishment stops when this level is reached. The single replenishment time threshold is denoted as T. The maximum allowable replenishment time is denoted as n. During normal machine operation, the fourth replenishment pump 115 starts to replenish the coolant in the circulation tank 21 from the lowest liquid level to the highest liquid level. The coolant consumption during normal machine operation is also taken into account. The replenishment time coefficient is denoted as n. When the fine filter 24 is severely blocked and the coolant cannot flow normally from the coarse filtration area to the fine filtration area, the time required for the coolant to rise from the lowest liquid level to the highest liquid level by relying entirely on the fourth replenishment pump 115 to directly replenish the fine filtration area is the ratio of the normal circulation replenishment time threshold.

[0030] The replenishment system records the concentration of the fine filtrate zone obtained by the concentration sensor as follows: The liquid level obtained by the liquid level sensor 26 is recorded as h.

[0031] when At this time, the coolant level and concentration in the circulation tank 21 are both in normal condition, and no replenishment or concentration adjustment is required; when At this time, the coolant level in the circulation tank 21 is low, and the coolant concentration is in normal condition. It is necessary to replenish the coolant, but no concentration adjustment is required. when The coolant level in the circulation tank 21 is low and the coolant concentration in the circulation tank 21 is abnormal, so it is necessary to add coolant and adjust the concentration at the same time. when If the coolant level in the circulation tank 21 is normal, but the coolant concentration in the circulation tank 21 is abnormal, only concentration adjustment is needed.

[0032] Liquid replenishment operation: Control the fourth liquid replenishment pump 115 to start, open the second valve 112, and directly inject the standard concentration of coolant in the mixing tank 16 into the circulation tank 21.

[0033] Concentration adjustment procedure: In When the coolant concentration in the circulation tank 21 is low, it is necessary to add coolant to raise the concentration to the standard concentration. Based on the actual concentration difference, the amount of coolant stock needed to be added is calculated, and the fourth replenishment pump 115 is started, and the third valve 113 is opened, injecting the coolant stock from the stock tank 17 into the circulation tank 21 to increase the coolant concentration. When the coolant concentration in the circulation tank 21 is high, water needs to be added to reduce the concentration to the standard concentration. The amount of water to be added is calculated based on the actual concentration difference. The fourth replenishment pump 115 is started and the first valve 111 is opened to inject water from the water tank 15 into the circulation tank 21 to reduce the coolant concentration.

[0034] The replenishment and concentration adjustment operations are carried out simultaneously: After calculating the amount of water or coolant that needs to be replenished based on the actual concentration difference, the second valve 112, the first valve 111, or the third valve 113 are alternately controlled to replenish the coolant in the circulation tank 21 and adjust the coolant concentration.

[0035] During the replenishment and concentration adjustment process, the replenishment system records the time t during which the fourth replenishment pump 115 starts and replenishes the fine filtrate from the lowest level to the highest level.

[0036] exist This indicates that the fluid resuscitation time is normal. exist If the replenishment time is too short, the fine filter 24 will become clogged, preventing the circulating coolant from entering the fine filter area. In this case, the replenishment will only be performed on the fine filter area of ​​the circulation tank 21, and the replenishment system will issue an alarm. exist This is because the fluid resuscitation time is too long. This is caused by excessive coolant carried by the parts during machine tool processing. This is caused by high temperatures and excessive moisture evaporation during machine tool processing. If the leak occurs, it is caused by a leak in the circulation pipeline between the circulation tank 21 and the machine tool, and the replenishment system will issue an alarm.

[0037] The above methods enable automatic and precise control of the coolant, and determine the cause of any abnormalities in the coolant replenishment based on the replenishment status, thereby improving the stability of the coolant level during machine tool operation and ultimately enhancing the reliability of the coolant replenishment device.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic machine tool coolant replenishment device based on a liquid level sensor, comprising a replenishment mechanism (1) and a liquid level detection mechanism (2), characterized in that, The liquid level detection mechanism (2) is located on one side of the liquid replenishment mechanism (1), and the liquid level detection mechanism (2) is connected to the liquid replenishment mechanism (1) by pipeline; The liquid replenishment mechanism (1) includes a machine body (11), a control cabinet (12) and a four-way pipe (114). The control cabinet (12) is connected to a liquid replenishment system. The liquid replenishment system is used to obtain the liquid level and concentration of the coolant during the machine tool processing and the liquid level of the liquid in each tank inside the machine body (11). After data analysis, it automatically adjusts the liquid level and concentration of the coolant during the machine tool processing. The liquid level detection mechanism (2) includes a circulation tank (21), a fifth replenishment pump (25), a liquid level sensor (26), a buffer assembly (3), and a cleaning assembly (4). The buffer assembly (3) and the cleaning assembly (4) are both located in the fine filtrate area. A concentration sensor is fixedly connected inside the circulation tank (21). The buffer assembly (3) includes two sets of limiting blocks (31) and several fan wheels (34). The cleaning assembly (4) includes a cylinder (42), a cleaning rod (46) and a motor (412). The bottom of the cleaning rod (46) is set to a semi-circle that matches the radius of the float of the liquid level sensor (26).

2. The automatic machine tool coolant replenishment device based on a liquid level sensor according to claim 1, characterized in that, The control cabinet (12) is located on the top of the body (11). The control cabinet (12) has a cabinet door. The cabinet door has a human-machine interface (13) and a display instrument (14). The human-machine interface (13) is electrically connected to the sensors inside the display instrument (14), the liquid replenishment mechanism (1), and the liquid level detection mechanism (2).

3. The automatic machine tool coolant replenishment device based on a liquid level sensor according to claim 2, characterized in that, Inside the body (11), a water tank (15), a mixing tank (16), and a stock solution tank (17) are arranged side by side. Three sets of first replenishment pumps (18) and fourth replenishment pumps (115) are fixedly connected to the top of the body (11). The first replenishment pump (18) is provided with a first inlet end and a first outlet end. The first inlet end of the first replenishment pump (18) is connected to the replenishment liquid corresponding to the water tank (15), the mixing tank (16), and the stock solution tank (17), respectively. The first outlet ends of the three sets of first replenishment pumps (18) are connected to the inside of the water tank (15), the mixing tank (16), and the stock solution tank (17), respectively. The water tank (15) and the original liquid tank (17) are respectively connected to the mixing tank (16) by pipeline. A second replenishing pump (19) is provided on the pipeline connecting the water tank (15) and the mixing tank (16), and a third replenishing pump (110) is provided on the pipeline connecting the original liquid tank (17) and the mixing tank (16).

4. The automatic machine tool coolant replenishment device based on a liquid level sensor according to claim 3, characterized in that, The four-way pipe (114) is provided with three second inlet ends and one second outlet end. The three second inlet ends of the four-way pipe (114) are respectively connected to the pipelines of the water tank (15), the mixing tank (16), and the raw liquid tank (17). The second outlet end of the four-way pipe (114) is connected to the pipeline of the fourth replenishment pump (115). A first valve (111) is provided on the pipeline connecting the water tank (15) and the second inlet end of the four-way pipe (114). A second valve (112) is provided on the pipeline connecting the mixing tank (16) and the second inlet end of the four-way pipe (114). A third valve (113) is provided on the pipeline connecting the raw liquid tank (17) and the second inlet end of the four-way pipe (114).

5. The automatic machine tool coolant replenishment device based on a liquid level sensor according to claim 4, characterized in that, The top of the circulation tank (21) is fixed with a filter port (22), and a coarse filter screen (23) is detachably installed inside the filter port (22). A fine filter screen (24) is detachably installed inside the circulation tank (21). The fine filter screen (24) divides the inside of the circulation tank (21) into a coarse filtrate area and a fine filtrate area. The coarse filtrate area is located below the coarse filter screen (23), and the fine filtrate area is located on the side of the fine filter screen (24) away from the coarse filtrate area. The bottom side of the circulation tank (21) is provided with an inlet (27), which is located in the fine filtrate area and close to the fine filter screen (24). The inlet (27) is connected to the fourth replenishment pump (115).

6. The automatic machine tool coolant replenishment device based on a liquid level sensor according to claim 5, characterized in that, The fifth replenishing pump (25) is fixed on the top of the circulation tank (21). The fifth replenishing pump (25) is located above the fine filtrate area. The fifth replenishing pump (25) is provided with a third inlet end and a third outlet end. The third inlet end is located at the bottom of the fine filtrate area. The third outlet end is connected to the machine tool coolant delivery pipeline. The liquid level sensor (26) is fixed inside the circulation tank (21), and both the liquid level sensor (26) and the concentration sensor are located in the fine filtrate area.

7. The automatic machine tool coolant replenishment device based on a liquid level sensor according to claim 6, characterized in that, The two sets of limiting blocks (31) are fixed to the top and bottom of the circulation box (21) respectively. The two sets of limiting blocks (31) are respectively provided with a number of sliding grooves (32). The number of sliding grooves (32) on the two sets of limiting blocks (31) is the same and their positions are corresponding. The sliding grooves (32) are provided with sliders (33) and two sets of springs (35) inside. The two sets of springs (35) are located on both sides of the slider (33). The ends of the two sets of springs (35) near the slider (33) are fixedly connected to the slider (33), and the other ends of the two sets of springs (35) are fixedly connected to the limiting blocks (31). The top of the fan wheel (34) is fixedly connected with a rotating rod (36). A number of second through slots are provided on the limiting block (31) located at the top of the circulation box (21), and a first through slot (28) is provided at the corresponding position on the top of the circulation box (21). The second through slots correspond to the position and number of the sliding groove (32). The rotating rod (36) passes through the first through slot (28) and the second through slot in sequence and extends into the sliding groove (32). The number of fan wheels (34) is the same as the number of sliding grooves (32) on the same set of limit blocks (31) and their positions correspond. The two ends of the fan wheels (34) are respectively connected to the sliders (33) bearings on the two sets of limit blocks (31).

8. The automatic machine tool coolant replenishment device based on a liquid level sensor according to claim 7, characterized in that, The top of the circulation box (21) is fixedly connected to a fixing block (41), the cylinder (42) is fixed to the side of the fixing block (41), the output end of the cylinder (42) is fixedly connected to a stop block (44), the stop block (44) is provided with a first magnetic element, the top of the inside of the circulation box (21) is fixedly connected to a fixing groove (43), a locking block (45) is slidably arranged inside the fixing groove (43), and the cleaning rod (46) is fixed to the bottom of the locking block (45).

9. The automatic machine tool coolant replenishment device based on a liquid level sensor according to claim 8, characterized in that, The bottom of the circulation tank (21) is fixedly connected to a fixed seat (47). The fixed seat (47) is located around the liquid level sensor (26). A rotating seat (48) is rotatably connected to the fixed seat (47). A slot (49) is provided on the rotating seat (48). The slot (49) matches the shape and size of the card block (45). A limiting groove (411) is provided on the top of the card block (45). The two ends of the limiting groove (411) are open. A limiting protrusion (410) is fixedly connected to the top of the fixed seat (47).

10. The automatic machine tool coolant replenishment device based on a liquid level sensor according to claim 9, characterized in that, The motor (412) is fixed on the top of the circulation box (21). The output end of the motor (412) is connected to the top bevel gear of the rotating seat (48). The circulation box (21) and the fixed seat (47) are both provided with drive grooves (413). The drive grooves (413) are located at the transmission point between the output end of the motor (412) and the top bevel gear of the rotating seat (48).

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