Cutting fluid condition detection apparatus

Abstract

The application relates to the technical field of machining, and discloses a cutting fluid state detection device. The detection device is used for detecting the state of cutting fluid stored in a liquid storage pool. The detection device comprises a liquid taking assembly, a temperature circulation control assembly and a gas detection assembly. The liquid taking assembly comprises a liquid pumping piece and a sampling pipe. The liquid pumping piece and the liquid storage pool are both communicated with the sampling pipe, the liquid pumping piece pumps the cutting fluid in the liquid storage pool to the sampling pipe, and the sampling pipe is provided with a gas outlet. The temperature circulation control assembly controls the temperature of the cutting fluid in the sampling pipe. The gas detection assembly is provided with an air inlet, the air inlet is communicated with the gas outlet, and the gas concentration of the cutting fluid in the sampling pipe is detected. The detection device is used, and the detection cost is reduced.

Description

Technical Field

[0001] This application relates to the field of cutting fluid technology, and in particular to a cutting fluid condition detection device. Background Technology

[0002] In machining processes, the performance of cutting fluid directly affects machining accuracy, machining life, and production efficiency. However, with increased usage time, cutting fluid deteriorates due to factors such as contamination, oxidation, and microbial growth, leading to a decline in its cooling, lubrication, and rust-preventing properties. Therefore, regularly assessing the condition of the cutting fluid is crucial for ensuring machining quality.

[0003] Currently, the commonly used assessment method is to use bacterial test strips to test the bacterial and fungal content in cutting fluids. Although this method is simple to operate, it has significant drawbacks: the test strips are disposable and cannot be reused, resulting in high testing costs and failing to meet the daily testing requirements of production equipment. Utility Model Content

[0004] In view of this, this application provides a cutting fluid condition testing device that has low testing cost and meets the daily testing requirements of production equipment.

[0005] One embodiment of this application provides a cutting fluid condition detection device. The detection device is used to detect the condition of cutting fluid stored in a reservoir. The detection device includes: a fluid extraction component, a temperature circulation control component, and a gas detection component. The fluid extraction component includes a suction element and a sampling tube. Both the suction element and the reservoir are connected to the sampling tube. The suction element extracts the cutting fluid from the reservoir into the sampling tube, and the sampling tube has a gas outlet. The temperature circulation control component controls the temperature of the cutting fluid in the sampling tube. The gas detection component has an inlet connected to the outlet to detect the concentration of gas generated by the cutting fluid in the sampling tube.

[0006] In the aforementioned cutting fluid condition testing equipment, the cutting fluid in the storage tank is drawn into the sampling tube using the extraction component, achieving automatic sampling and improving sampling efficiency. Furthermore, the temperature of the cutting fluid in the sampling tube is controlled by a temperature circulation control component to prevent temperature changes from affecting the test results, ensuring the accuracy of the results. Additionally, a gas detection component detects the gas concentration generated by the cutting fluid in the sampling tube and assesses the cutting fluid condition based on the gas concentration. Throughout the testing process, the gas detection component can perform multiple cyclic tests, reducing the consumable cost of the testing equipment and minimizing downtime for replacing detection components, thus improving testing efficiency and meeting the daily testing requirements of production equipment.

[0007] In some embodiments of this application, the gas detection component includes an alarm element that issues an alarm when the gas concentration is detected to be greater than a preset threshold.

[0008] Issuing an alarm when the gas concentration is detected to be greater than a preset threshold improves the detection efficiency of the detection equipment.

[0009] In some embodiments of this application, the temperature circulation control component includes a circulation element and a temperature control element. The circulation element includes a circulation tank storing heat exchange medium and a heat exchange medium pipeline. The sampling tube is provided with a circulation pipe, which is connected to the circulation tank through the heat exchange medium pipeline. The temperature control element controls the temperature of the heat exchange medium in the circulation tank. The heat exchange medium circulates between the circulation tank and the circulation pipe through the heat exchange medium pipeline to control the temperature of the cutting fluid in the sampling tube.

[0010] By setting a temperature circulation control component in the testing equipment, the circulation pipe is connected to the circulation tank through the heat exchange medium pipeline, so that the heat exchange medium pipeline can circulate between the circulation tank and the circulation pipe, thereby controlling the temperature of the cutting fluid in the sampling tube in real time. This ensures the stability of the temperature of the cutting fluid in the sampling tube, avoids the problem of inaccurate test results caused by temperature changes, and improves the accuracy of the cutting fluid status detected by the testing equipment.

[0011] In some embodiments of this application, the circulation chamber is equipped with a temperature measuring element to monitor the temperature of the heat exchange medium inside the circulation chamber and to send the temperature to the temperature control element, which is beneficial to accurately control the temperature of the heat exchange medium inside the circulation chamber within a preset temperature range.

[0012] In some embodiments of this application, the circulation box is equipped with a heating element to heat the heat exchange medium inside the circulation box.

[0013] By installing a heating element in the circulation tank, the temperature of the heat exchange medium inside the circulation tank can be effectively controlled.

[0014] In some embodiments of this application, the liquid sampling assembly further includes a liquid pipeline connected between the sampling tube and the storage tank. The liquid pipeline is equipped with a control valve. When the control valve is in the activated state, the cutting fluid flowing out of the storage tank flows into the sampling tube via the liquid pipeline.

[0015] By setting a one-way valve, backflow of cutting fluid can be effectively prevented, ensuring sampling accuracy. At the same time, it can avoid detection deviation caused by backflow, ensuring detection accuracy.

[0016] In some embodiments of this application, the bottom wall of the liquid storage tank is provided with a liquid outlet, which is connected to the liquid pipeline.

[0017] By placing the outlet on the bottom wall of the storage tank, the problem of the cutting fluid being present in the storage tank but not being able to be extracted by the extraction component is avoided.

[0018] In some embodiments of this application, the liquid sampling assembly further includes a liquid detection element, which is installed between the liquid pipeline and the sampling tube to detect the flow rate and / or pressure of the cutting fluid entering the sampling tube.

[0019] Monitoring the pressure of cutting fluid in a liquid pipeline using a liquid detection device can improve the safety and flow stability of the liquid pipeline, thereby ensuring sampling accuracy.

[0020] In some embodiments of this application, the liquid sampling assembly further includes a drain pipe, and the sampling tube is also provided with a drain port. The drain pipe is connected to the drain port so that the cutting fluid in the sampling tube flows out along the drain pipe.

[0021] The cutting fluid in the sampling tube can be quickly discharged to the outside through the drainage pipeline, thereby improving the efficiency of cutting fluid replacement.

[0022] In some embodiments of this application, the liquid storage tank is equipped with a liquid level sensor to detect the height of the cutting fluid in the liquid storage tank, which is beneficial for accurately controlling the amount of cutting fluid in the liquid storage tank. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a detection device in one embodiment of this application.

[0024] Figure 2 This is a partial schematic diagram of the detection device in one embodiment of this application.

[0025] Figure 3 This is another partial schematic diagram of the detection device in one embodiment of this application.

[0026] Explanation of main component symbols 100 - Detection equipment; 10 - Storage tank; 11 - First storage chamber; 12 - Outlet; 13 - Liquid level sensor; 20 - Liquid sampling assembly; 21 - Sampling tube; 210 - First suction port; 211 - Drain port; 212 - Gas outlet; 213 - Liquid inlet; 214, 214a - Circulation pipe; 2140 - Inlet; 2141 - Outlet; 2142 - Chamber; 2143 - First vertical section; 2144 - Horizontal section; 2145 - Second vertical section; 22 - Liquid extraction component; 220 - Second liquid extraction port; 23 - Liquid pipeline; 230 - Control valve; 24 - Liquid detection component; 240 - Flow meter; 241 - Sensor; 25 - Drainage pipeline; 250 - Switch valve; 30 - Temperature circulation control component; 31 - Circulation component; 310 - Circulation tank; 3100 - Second liquid storage chamber; 3101 - Pressure relief valve; 3102 - Temperature measuring component; 3103 - Heating component; 311 - Heat exchange medium pipeline; 32 - Temperature control component; 40 - Gas detection component; 41 - Air inlet; 42 - Alarm component; 43 - Side leakage pipeline.

[0027] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0030] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] Please also refer to Figures 1 to 3 One embodiment of this application provides a cutting fluid condition detection device 100. The detection device 100 is used to detect the condition of the cutting fluid stored in a reservoir 10. The detection device 100 assesses the condition of the cutting fluid by analyzing the concentration of gases produced by bacteria and fungi in the cutting fluid.

[0032] The liquid storage tank 10 is provided with a first liquid storage chamber 11 for storing cutting fluid. The first liquid storage chamber 11 is used to store the cutting fluid to be tested. The bottom wall surface of the liquid storage tank 10 is provided with a liquid outlet 12. The liquid outlet 12 is connected to the first liquid storage chamber 11. By placing the liquid outlet 12 on the bottom wall surface of the liquid storage tank 10, the problem of cutting fluid not being able to be extracted by the pumping unit 22 when there is cutting fluid in the liquid storage tank 10 is avoided.

[0033] The storage tank 10 is also equipped with a sensor 241 and a liquid level sensor 24113 to detect the height of the cutting fluid in the storage tank 10, which is beneficial for accurately controlling the amount of cutting fluid in the storage tank 10.

[0034] See Figure 1 As shown, the detection device 100 includes a liquid sampling component 20, a temperature circulation control component 30, and a gas detection component 40. The temperature circulation control component 30 controls the temperature of the cutting fluid in the liquid sampling component 20, and the gas detection component 40 is connected to the liquid sampling component 20.

[0035] In practical applications, the temperature of the cutting fluid in the sampling assembly 20 is controlled by the temperature cycle control component 30 to avoid the influence of temperature changes on the test results, thus ensuring the accuracy of the test results. Furthermore, the gas detection component 40 detects the concentration of gas generated by the cutting fluid in the sampling tube 21 and assesses the state of the cutting fluid based on the gas concentration. Throughout the testing process, the gas detection component 40 can perform multiple cyclic tests, reducing the consumable cost of the testing equipment and minimizing the downtime for replacing the detection components, thereby improving testing efficiency and meeting the daily testing requirements of the production equipment.

[0036] Further integration Figure 2 As shown, the liquid sampling assembly 20 includes a sampling tube 21. The sampling tube 21 is connected to the liquid storage tank 10. The sampling tube 21 is also provided with a liquid inlet 213. The liquid inlet 213 is connected to the first liquid storage chamber 11, so that the cutting fluid in the first liquid storage chamber 11 flows out to the sampling tube 21. By using the liquid storage tank 10 to store the cutting fluid for sampling by the sampling tube 21, the liquid sampling efficiency of the liquid sampling assembly 20 is improved.

[0037] In some embodiments, the liquid sampling assembly 20 further includes a liquid extraction component 22. Both the liquid extraction component 22 and the liquid storage tank 10 are connected to the sampling tube 21. The liquid extraction component 22 extracts the cutting fluid from the liquid storage tank 10 into the sampling tube 21 for detection by the gas detection assembly 40.

[0038] In practical applications, by using the liquid extraction component 22 to extract the cutting fluid in the liquid storage tank 10 to the sampling tube 21, automatic sampling is achieved, which improves sampling efficiency.

[0039] In some embodiments, the sampling tube 21 is provided with a first extraction port 210. The extraction component 22 has a second extraction port 220. The storage tank 10, the first extraction port 210 and the second extraction port 220 are sequentially connected along the flow direction of the cutting fluid to form an extraction channel, so that the extraction component 22 can extract the cutting fluid in the storage tank 10 along the extraction channel to the sampling tube 21, thereby realizing automatic sampling and improving sampling efficiency.

[0040] In some embodiments, the liquid sampling assembly 20 further includes a liquid conduit 23. The liquid conduit 23 connects the sampling tube 21 and the liquid storage tank 10. The liquid conduit 23 is provided with a control valve 230. When the control valve 230 is in the activated state, the cutting fluid flowing out of the liquid storage tank 10 flows into the sampling tube 21 via the liquid conduit 23.

[0041] In some embodiments, the control valve 230 can be a one-way valve. By setting a one-way valve, the backflow of cutting fluid can be effectively prevented, ensuring sampling accuracy. At the same time, the detection deviation caused by backflow can be avoided, ensuring detection accuracy.

[0042] In some embodiments, the liquid sampling assembly 20 further includes a liquid detection element 24, which is installed between the liquid pipeline 23 and the sampling tube 21 to detect the flow rate and / or pressure of the cutting fluid entering the sampling tube 21. Monitoring the pressure of the cutting fluid in the liquid pipeline 23 by using the liquid detection element 24 helps improve the safety and flow stability of the liquid pipeline 23, thereby ensuring sampling accuracy.

[0043] The liquid detection element 24 may include a flow meter 240. The flow meter 240 monitors the flow rate of the cutting fluid in the liquid line 23, specifically the amount of cutting fluid flowing out of the circulation tank 310 and the amount entering the sampling tube 21. Monitoring the flow rate changes of the cutting fluid in the liquid line 23 via the flow meter 240 helps control the amount of cutting fluid flowing out of the circulation tank 310, thereby ensuring the stability of the amount of cutting fluid in the circulation tank 310.

[0044] The liquid detection component 24 may also include a sensor 241. The sensor 241 monitors the pressure of the cutting fluid in the liquid line 23. The sensor 241 can be a pressure sensor 241, which can detect changes in the pressure of the cutting fluid in the liquid line 23, and promptly determine whether there is a blockage or leakage of cutting fluid in the liquid line 23, thereby improving the safety of the liquid line 23.

[0045] In some embodiments, the liquid sampling assembly 20 further includes a drain pipe 25. The sampling tube 21 is also provided with a drain port 211. The drain pipe 25 is connected to the drain port 211 so that the cutting fluid in the sampling tube 21 flows out along the drain pipe 25. The cutting fluid in the sampling tube 21 can be quickly discharged to the outside through the drain pipe 25, thereby improving the cutting fluid replacement efficiency.

[0046] The drain port 211 is located at the bottom of the sampling tube 21, which helps to improve the degree of drainage of cutting fluid in the sampling tube 21 and reduce the risk of cutting fluid residue in the sampling tube 21.

[0047] The drain line 25 is equipped with a switch valve 250. The switch valve 250 can be a solenoid valve. It controls the opening and closing of the drain line 25 by electromagnetic force. The solenoid valve is not only fast-responding, but also precise and controllable, energy-saving and safe.

[0048] In practical applications, when the cutting fluid in the sampling tube 21 needs to be replaced, the switch valve 250 is opened, and the detection device 100 can quickly discharge the cutting fluid in the sampling tube 21 to the outside through the drain pipe 25, shortening the discharge time of the cutting fluid in the sampling tube 21 and further improving the working efficiency of the detection device 100.

[0049] Further integration Figure 3 As shown, the temperature circulation control assembly 30 includes a circulation component 31 and a temperature control component 32. The circulation component 31 includes a circulation tank 310 storing heat exchange medium and a heat exchange medium pipeline 311. The sampling tube 21 is provided with a circulation pipe 214. The circulation pipe 214 is connected to the circulation tank 310 through the heat exchange medium pipeline 311.

[0050] In some embodiments, the circulation tank 310 is provided with a second liquid storage chamber 3100. The second liquid storage chamber 3100 stores the heat exchange medium, which may be water, a water-based solution, synthetic oil, etc. The circulation pipe 214 has an inlet 2140, an outlet 2141, and a chamber 2142 connecting the inlet 2140 and the outlet 2141. Both the inlet 2140 and the outlet 2141 are connected to the heat exchange medium pipeline 311.

[0051] Understandably, the water inlet 2140, water outlet 2141, second liquid storage chamber 3100, and heat exchange medium pipeline 311 form a circulation loop. The heat exchange medium in the second liquid storage chamber 3100 circulates along the circulation loop to control the temperature of the cutting fluid in the sampling tube 21, ensuring the uniformity and stability of the temperature of the cutting fluid in the sampling tube 21, so that the subsequent testing equipment 100 can perform performance testing on the cutting fluid in the sampling tube 21.

[0052] In some embodiments, the circulation pipe 214 can be a U-shaped pipe 214a. The U-shaped pipe 214a includes a first vertical section 2143, a horizontal section 2144, and a second vertical section 2145 connected in sequence. The inlet 2140 is located on the horizontal section 2144 near the bottom of the first vertical section 2143. The outlet 2141 is located on the second vertical section 2145 near the top. By setting the installation position of the outlet 2141 higher than that of the inlet 2140, on the one hand, the backflow of the heat exchange medium caused by siphon phenomenon can be avoided, ensuring that the heat exchange medium remains stable when the machine is stopped. On the other hand, the higher position of the outlet 2141 helps air bubbles in the U-shaped pipe to rise and be discharged naturally, reducing air resistance and improving the circulation efficiency of the heat exchange medium.

[0053] In some embodiments, the circulation chamber 310 is provided with a temperature measuring element 3102 to monitor the temperature of the heat exchange medium in the circulation chamber 310 and send the temperature to the temperature control element 32, which is beneficial to accurately control the temperature in the circulation chamber 310 to be within a preset temperature range.

[0054] The temperature sensing element 3102 can be immersed in the cutting fluid to obtain the core temperature data of the cutting fluid in real time, avoiding external environmental interference and ensuring measurement accuracy.

[0055] The number of temperature sensing elements 3102 can be multiple. On the one hand, distributing multiple temperature sensing elements 3102 at different locations in the circulation chamber 310, such as installing them near the bottom of the circulation chamber 310 or in dead corners of the flow, allows for monitoring of the lowest temperature or the temperature of areas prone to accumulation, further ensuring measurement accuracy. On the other hand, it avoids the problem of not being able to measure the temperature inside the circulation chamber 310 due to the failure of one temperature sensing element 3102, thus improving the reliability of the measurement.

[0056] Temperature sensing element 3102 can be a temperature detector, which can monitor the temperature of the cutting fluid.

[0057] In some embodiments, the circulation tank 310 is provided with a heating element 3103. The heating element 3103 is used to heat the heat exchange medium inside the circulation tank 310.

[0058] In some embodiments, the heating element 3103 may be installed inside the circulation tank 310. For example, it may be installed at the bottom of the circulation tank 310 to facilitate heating of the cutting fluid inside the circulation tank 310. The heating element 3103 may be a resistance heating device or an electromagnetic heating device, etc.

[0059] Understandably, since the heating element 3103 is located inside the circulation tank 310 and the circulation tank 310 has a large installation space, production and installation personnel can increase the number or length of the heating element 3103 to improve the heating effect of the heating element 3103 on the cutting fluid.

[0060] In practical applications, when the testing equipment 100 needs to test the cutting fluid, the heating element 3103 first heats the heat exchange medium in the second liquid storage chamber 3100 to a preset temperature range, wherein the preset temperature range can be 27°C to 30°C. The heated heat exchange medium flows out from the second liquid storage chamber 3100 to the heat exchange medium pipeline 311, flows through the heat exchange medium pipeline 311 to the inlet 2140 of the circulation pipe 214, and flows along the inlet 2140 to the circulation pipe 214. Then, it flows back from the outlet 2141 of the circulation pipe 214 to the second liquid storage chamber 3100 through the heat exchange medium pipeline 311, and the heat exchange medium circulates in this way.

[0061] In some embodiments, the temperature circulation control assembly 30 further includes a temperature controller 32. The temperature controller 32 controls the temperature of the heat exchange medium within the circulation tank 310. The heat exchange medium circulates between the circulation tank 310 and the circulation pipe 214 via the heat exchange medium pipeline 311 to control the temperature of the cutting fluid in the sampling pipe 21.

[0062] In some embodiments, the heating element 3103 and the temperature measuring element 3102 are both electrically connected to the temperature control element 32. In practical applications, when the temperature measuring element 3102 detects that the temperature in the circulation tank 310 is not within the preset temperature range, the temperature measuring element 3102 sends a temperature control signal to the temperature control element 32. The temperature control element 32 turns the heating element 3103 on or off according to the received temperature control signal, accurately adjusts the cutting fluid in the circulation tank 310, and controls the temperature of the cutting fluid within the preset range, so as to avoid the temperature being too high or too low and affecting the accuracy and reliability of the test results.

[0063] In some embodiments, the circulation tank 310 is further provided with a pressure relief valve 3101. The pressure relief valve 3101 releases gas from inside the second reservoir 3100 when the heating element 3103 heats the cutting fluid. When the heating element 3103 heats the heat exchange medium, the temperature of the heat exchange medium rises, the air inside the second reservoir 3100 expands due to heat, and is discharged to the external environment through the pressure relief valve 3101.

[0064] By setting the pressure relief valve 3101, the detection device 100 automatically discharges the gas inside the second liquid storage chamber 3100 to the external environment, so as to ensure that the pressure inside the second liquid storage chamber 3100 is always kept within a safe range, which helps to improve the safety of the detection device 100.

[0065] In some embodiments, the gas detection assembly 40 is provided with an air inlet 41. The sampling tube 21 is provided with an air outlet 212. The air inlet 41 and the air outlet 212 are connected to each other so that the gas detection assembly 40 can detect the concentration of gas generated by the cutting fluid.

[0066] Understandably, the gas detection component 40 detects the concentration of gases produced by bacteria and fungi in the cutting fluid, and assesses the condition of the cutting fluid based on the gas concentration. Throughout the testing process, the gas detection component 40 can perform multiple cyclic tests, reducing the consumable cost of the testing equipment and minimizing downtime for replacing the detection component, thus improving testing efficiency and meeting the daily testing requirements of the production equipment.

[0067] In some embodiments, the gas detection assembly 40 includes an alarm element 42. The alarm element 42 issues an alarm when it detects that the gas concentration is greater than a preset threshold.

[0068] In some embodiments, the alarm element 42 can be a gas detector. By monitoring the gas concentration through the gas detector and combining it with the pre-established correspondence between the gas concentration and the preset threshold, the state of the cutting fluid is evaluated, and it is determined whether the gas concentration generated by the cutting fluid reaches the warning value. If the gas detector detects that the gas concentration is greater than the preset threshold, it is determined that the state of the cutting fluid is abnormal, and the gas detector issues an alarm. The cutting fluid in the storage tank 10 needs to be replaced or treated in time, thus ensuring the timeliness of the detection by the detection device 100.

[0069] In some embodiments, the gas detection component 40 is detachably connected to the sampling tube 21. In practical applications, different gas detection components 40 are required depending on the composition of the cutting fluid. By detachably connecting the gas detection component 40 to the sampling tube 21, it is easier to replace and maintain the gas detection component 40, reducing maintenance costs and improving the flexibility of the testing equipment.

[0070] In some embodiments, the gas detection assembly 40 further includes a side-leakage conduit 43. Before detecting gas, the gas detection assembly 40 can perform side-leakage detection on the conduit in the liquid sampling assembly 20 and the gas detection assembly 40 to avoid gas leakage that could affect the test results.

[0071] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and substance of the technical solutions of this application.

Claims

1. A cutting fluid condition detection device, used to detect the condition of cutting fluid stored in a storage tank, characterized in that, The detection equipment includes: The liquid extraction assembly includes a liquid extraction component and a sampling tube. Both the liquid extraction component and the liquid storage tank are connected to the sampling tube. The liquid extraction component extracts the cutting fluid from the liquid storage tank into the sampling tube. The sampling tube is provided with an air outlet. A temperature circulation control component controls the temperature of the cutting fluid in the sampling tube; The gas detection component is provided with an air inlet, which is connected to the air outlet to detect the gas concentration generated by the cutting fluid in the sampling tube.

2. The detection device according to claim 1, characterized in that, The gas detection component includes: An alarm device will issue an alarm when the gas concentration is detected to be greater than a preset threshold.

3. The detection device according to claim 1, characterized in that, The temperature circulation control component includes a circulation element and a temperature control element. The circulation element includes a circulation tank storing heat exchange medium and a heat exchange medium pipeline. The sampling tube is provided with a circulation pipe, which is connected to the circulation tank through the heat exchange medium pipeline. The temperature control element controls the temperature of the heat exchange medium in the circulation tank. The heat exchange medium circulates between the circulation tank and the circulation pipe through the heat exchange medium pipeline to control the temperature of the cutting fluid in the sampling tube.

4. The detection device according to claim 3, characterized in that, The circulation chamber is equipped with a temperature measuring device to monitor the temperature of the heat exchange medium inside the circulation chamber and to send the temperature to the temperature control device.

5. The detection device according to claim 3, characterized in that, The circulation box is equipped with a heating element to heat the heat exchange medium inside the circulation box.

6. The detection device according to claim 1, characterized in that, The liquid sampling assembly further includes a liquid pipeline connected between the sampling tube and the liquid storage tank. The liquid pipeline is equipped with a control valve. When the control valve is in the activated state, the cutting fluid flowing out of the liquid storage tank flows into the sampling tube through the liquid pipeline.

7. The detection device according to claim 6, characterized in that, The bottom wall of the storage tank is provided with a liquid outlet, which is connected to the liquid pipeline.

8. The detection device according to claim 6, characterized in that, The liquid sampling assembly further includes a liquid detection element, which is installed between the liquid pipeline and the sampling tube to detect the flow rate and / or pressure of the cutting fluid entering the sampling tube.

9. The detection device according to claim 1, characterized in that, The liquid sampling assembly further includes a drain pipe, and the sampling tube is provided with a drain port. The drain pipe is connected to the drain port so that the cutting fluid in the sampling tube flows out along the drain pipe.

10. The detection device according to claim 1, characterized in that, The storage tank is equipped with a liquid level sensor to detect the height of the cutting fluid in the storage tank.

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