Rolling oil conductivity on-line detection device

Abstract

The utility model discloses a rolling oil conductivity on-line detection device, and belongs to the technical field of aluminum foil production equipment. The device comprises a detection box, a control module, a pressurizing pipe, an oil inlet pipe, an oil outlet pipe, a pipeline filter, an electromagnetic valve, a detection cavity, a conductivity meter, a flow valve and a flow meter, the control module, the pressurizing pipe, the oil inlet pipe, the oil outlet pipe, the pipeline filter, the electromagnetic valve, the detection cavity, the conductivity meter, the flow valve and the flow meter are arranged in the detection box. The tail end of the oil inlet pipe is connected with the bottom of the detection cavity, a pipeline filter, an electromagnetic valve and a pressurizing pipe are sequentially arranged on the oil inlet pipe, the starting end of the oil outlet pipe is connected with the upper part of the detection cavity, a flow valve and a flowmeter are arranged on the oil outlet pipe, and the pressurizing pipe is connected with a compressed air supply structure through a pipeline; and the electromagnetic valve and the conductivity meter are electrically connected with the control module. The purity of the rolling oil is judged according to the electric conductivity of the rolling oil, fire caused by too pure rolling oil is avoided, and production safety is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum foil production equipment, and particularly relates to an online detection device for the conductivity of rolling oil. Background Art

[0002] Aluminum sheets with a thickness of less than 0.2mm are usually called aluminum foil. The thickness of aluminum foil ranges from 0.005mm to 0.2mm. Due to its excellent light-shielding, moisture-proof, good gas barrier and flavor retention properties, it is widely used in various fields such as food, medicine and electronics. In recent years, the domestic aluminum processing industry has flourished and has become a major aluminum processing production country.

[0003] At present, aluminum foil production adopts rolling process. In the production process, rolling oil made of base oil refined from petroleum products and active additives is used for cooling, lubrication and cleaning. Due to the friction in the rolling process, aluminum powder falls off and enters the rolling oil tank after being flushed by rolling oil, making the initial pure and transparent rolling oil black. The black rolling oil will affect the rolling lubrication and surface quality of aluminum foil. Due to the high cost of rolling oil, manufacturers generally use rolling oil circulation filtration to recycle rolling oil.

[0004] The filtration of rolling oil in the aluminum foil industry is mainly based on plate filters. A certain proportion of filter aids (diatomaceous earth and kaolin) is added to the filter batching tank. The diatomaceous earth and kaolin are mixed and added to the filter to intercept the aluminum powder or other particles in the rolling oil, thereby achieving the purpose of cleaning and recycling the rolling oil.

[0005] For example, the patent application number CN202111676452.8 discloses a method for filtering rolling oil of a battery aluminum foil rolling mill, which method includes the following steps:

[0006] (1) Put diatomaceous earth and activated clay into a mixing box, wherein, based on the total weight of the diatomaceous earth and the activated clay being 100 parts by weight, the diatomaceous earth is 55-60 parts by weight, and the activated clay is 40-45 parts by weight.

[0007] (2) Add rolling oil into a mixing box, stir and mix the diatomaceous earth and the activated clay, and then use a plate filter to set parameters, with the soil suction execution time being 7-12 seconds and the intermediate interval time being 12-21 seconds.

[0008] (3) During production rolling, replace the filter paper after 10-16 hours.

[0009] For example, the patent application number CN201210027828.7 discloses a method for filtering rolling oil of an aluminum foil rolling mill, comprising the steps of:

[0010] A: Select diatomaceous earth and clay in a weight ratio of 4:1.

[0011] B: Evenly mix the diatomaceous earth and white clay with the rolling oil to be filtered.

[0012] C: The mixture of diatomaceous earth, clay and rolling oil is spread on filter paper for filtering.

[0013] The applicant discovered in the actual production process that the purer the filtered rolling oil is, the better. If the rolling oil is too pure, static electricity fires are likely to occur during production. Summary of the invention

[0014] In order to solve the above problems, the embodiment of the utility model provides an online detection device for the conductivity of rolling oil, which can judge the purity of rolling oil by the conductivity of rolling oil, avoid fire caused by rolling oil being too pure, and ensure production safety. The technical solution is as follows:

[0015] The embodiment of the utility model provides an online detection device for the conductivity of rolling oil, which includes a detection box 1 and a control module 13 therein, a pressurizing pipe 6, an oil inlet pipe 2, an oil outlet pipe 16, a pipeline filter 4, a solenoid valve 8, a detection chamber 11, a conductivity meter 12, a flow valve 14 and a flow meter 15, wherein the detection chamber 11 is vertically arranged, the conductivity meter 12 is arranged at the top of the detection chamber 11 and its probe extends into the middle or lower part of the detection chamber 11, the end of the oil inlet pipe 2 is connected to the bottom of the detection chamber 11 and the pipeline filter 4, the solenoid valve 8 and the pressurizing pipe 6 are arranged thereon in sequence, the starting end of the oil outlet pipe 16 is connected to the upper part of the detection chamber 11 and the flow valve 14 and the flow meter 15 are arranged thereon, the pressurizing pipe 6 is connected to the compressed air supply structure through a pipeline; the solenoid valve 8 and the conductivity meter 12 are electrically connected to the control module 13.

[0016] Specifically, the detection chamber 11 in the embodiment of the utility model is arranged in the middle of the detection box 1, the starting end of the oil inlet pipe 2 passes through the upper part of one side of the detection box 1, and the end of the oil outlet pipe 16 passes through the bottom of the other side of the detection box 1.

[0017] Specifically, the oil inlet pipe 2 in the embodiment of the utility model first extends vertically downward to the lower part of the detection box 1, then horizontally to the bottom of the detection chamber 11, and finally vertically upward to the bottom of the detection chamber 11; the pipeline filter 4 and the solenoid valve 8 are arranged on the descending section of the oil inlet pipe 2, and the pressurizing pipe 6 is arranged on the upper side of the horizontal section of the oil inlet pipe 2.

[0018] Preferably, the upper end of the pressurizing pipe 6 in the embodiment of the utility model is higher than the connection between the detection chamber 11 and the oil outlet pipe 16 .

[0019] Preferably, the rolling oil conductivity online detection device in the embodiment of the utility model also includes a first valve 3, a second valve 7, a third valve 9 and a bypass pipe 5, the first valve 3 is arranged on the oil inlet pipe 2 and is located upstream of the pipeline filter 4, the second valve 7 and the third valve 9 are both arranged on the pressurizing pipe 6; one end of the bypass pipe 5 is connected to the oil inlet pipe 2 and is located between the pipeline filter 4 and the solenoid valve 8, and the other end is connected to the pressurizing pipe 6 and is located between the second valve 7 and the third valve 9; during detection, the first valve 3, the second valve 7 and the third valve 9 are all opened.

[0020] Furthermore, in the embodiment of the utility model, a middle fixed frame 17 and a lower fixed frame 18 are respectively provided in the middle and lower parts of the detection box 1 in the embodiment of the utility model, the descending section is fixed on the middle fixed frame 17 and the lower fixed frame 18, the bypass pipe 5 is horizontally arranged and located between the middle fixed frame 17 and the lower fixed frame 18, the pipeline filter 4 is located above the middle fixed frame 17, the solenoid valve 8 is located between the middle fixed frame 17 and the lower fixed frame 18, the pressurized pipe 6 is vertically arranged and fixed on the middle fixed frame 17 and the lower fixed frame 18, the ascending section is fixed on the lower fixed frame 18, the detection chamber 11 is fixed on the middle fixed frame 17, the oil outlet pipe 16 is vertically arranged and fixed on the middle fixed frame 17 and the lower fixed frame 18, the flow meter 15 and the flow valve 14 are both located between the middle fixed frame 17 and the lower fixed frame 18, and the control module 13 is located at the upper part of the detection box 1.

[0021] Specifically, the conductivity meter 12 in the embodiment of the utility model is a CM-08B oil conductivity meter.

[0022] Specifically, the detection cavity 11 in the embodiment of the utility model is a cylindrical structure with a conical bottom, and is coaxially arranged with the probe of the conductivity meter 12 .

[0023] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0024] (1) The purity of rolling oil is determined by its conductivity to avoid fire caused by rolling oil being too pure (required to be greater than ≥200ps / m) to ensure production safety;

[0025] (2) Continuous testing of rolling oil;

[0026] (3) The rolling oil after testing can be reused to reduce waste;

[0027] (4) Compact structure;

[0028] (5) Pressurized delivery is adopted, and no pump is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1It is a structural schematic diagram of an online detection device for electrical conductivity of rolling oil in an embodiment of the utility model;

[0030] Figure 2 It is a principle block diagram of a rolling oil purification system with fire prevention function in an embodiment of the utility model.

[0031] In the figure: 1 detection box, 2 oil inlet pipe, 3 first valve, 4 pipeline filter, 5 bypass pipe, 6 pressurized pipe, 7 second valve, 8 solenoid valve, 9 third valve, 10 air pipe joint, 11 detection chamber, 12 conductivity meter, 13 control module, 14 flow valve, 15 flow meter, 16 oil outlet pipe, 17 middle fixed bracket, 18 middle fixed bracket. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] See also Figure 1 Embodiment 1 provides an online detection device for the conductivity of rolling oil, which includes a detection box 1 and a control module 13 therein, a pressure pipe 6, an oil inlet pipe 2, an oil outlet pipe 16, a pipeline filter 4, an electromagnetic valve 8, a detection chamber 11, a conductivity meter 12, a flow valve 14 and a flow meter 15. Among them, the pressure pipe 6 is used to provide power for the rolling oil to be output by the detection chamber 11. The electromagnetic valve 8 is used to control the detection to proceed or end. The pipeline filter 4 is required to allow aluminum powder in the rolling oil to pass through, and is used to filter the rolling oil (remove larger impurities) to prevent larger particles from entering and blocking the pipeline. In addition, the pipeline filter 4 filters the rolling oil. Filtration may cause changes in conductivity before and after filtration. This embodiment can count a large number of detected conductivity, find the critical point that is easy to ignite, and form a corresponding relationship, that is, no matter what the actual conductivity of the rolling oil is, as long as the display is greater than a predetermined value (such as 200ps / m), it can be guaranteed that it is not easy to ignite. The detection chamber 11 and the conductivity meter 12 cooperate to realize the detection of the conductivity of the rolling oil. The control module 13 is used to control the entire device. The flow valve 14 and the flow meter 15 cooperate to control the flow rate of the detection to ensure that the top of the detection chamber 11 is compressed air.

[0035] The detection box 1 is specifically a vertically arranged rectangular box structure, on which an openable box door is arranged, and a middle fixing frame 17 and a lower fixing frame 18 are respectively arranged in the middle and lower parts thereof.

[0036] The detection chamber 11 is vertically arranged in the middle of the detection box 1 , and is a cylindrical structure (with an inner diameter greater than 1 cm) with a conical bottom (larger at the top and smaller at the bottom).

[0037] The conductivity meter 12 is disposed at the top of the detection chamber 11, and its probe extends into the middle or lower part of the detection chamber 11. It is coaxially arranged with the detection chamber 11, and can be specifically a CM-08B oil conductivity meter.

[0038] The starting end of the oil inlet pipe 2 passes through the upper part of one side of the detection box 1, and the end thereof is connected to the bottom of the detection chamber 11, on which a pipeline filter 4, a solenoid valve 8 and a pressurizing pipe 6 are arranged in sequence.

[0039] The starting end of the oil outlet pipe 16 is connected to the upper part of the detection chamber 11, and the end thereof passes through the bottom of the other side of the detection box 1, on which a flow valve 14 and a flow meter 15 are arranged (the flow valve 14 and the flow meter 15 are arranged in sequence along the conveying direction).

[0040] The pressurized pipe 6 is connected to the compressed air supply structure through a pipeline, and is used to deliver the tested rolling oil through the oil outlet pipe 16 .

[0041] The solenoid valve 8 and the conductivity meter 12 are electrically connected to the control module 13 through wires, and the control module 13 is used to power the solenoid valve 8 and the conductivity meter 12, control the on and off of the solenoid valve 8, and obtain the detection data of the conductivity meter 12. The control module 13 is a conventional structure (specifically, it can be a PLC), and a detailed description is omitted in this embodiment.

[0042] The oil inlet pipe 2, the oil outlet pipe 16 and the pressure pipe 6 in this embodiment are all metal pipes.

[0043] Specifically, see Figure 1 The oil inlet pipe 2 in the embodiment of the utility model first extends vertically downward to the lower part of the detection box 1 to form a descending section, then extends horizontally to the bottom of the detection chamber 11 to form a horizontal section, and finally extends vertically upward to the bottom of the detection chamber 11 to form an ascending section. The pipeline filter 4 and the solenoid valve 8 are arranged on the descending section of the oil inlet pipe 2. The pressurizing pipe 6 is arranged on the upper side of the horizontal section of the oil inlet pipe 2, which is located above the horizontal section. It is vertically arranged, and the air pipe joint 10 at its upper end is connected to the compressed air supply structure through a pipeline. Its upper end is higher than the connection between the detection chamber 11 and the oil outlet pipe 16 (to prevent the rolling oil from flowing out of the air pipe joint 10 when there is no compressed air supply from the compressed air supply structure).

[0044] Further, see Figure 1, the descending section in this embodiment is fixed (through a fixing member, the same below) on the middle fixing frame 17 and the lower fixing frame 18. The pipeline filter 4 is located above the middle fixing frame 17, the solenoid valve 8 is located between the middle fixing frame 17 and the lower fixing frame 18, the horizontal section is located below the lower fixing frame 18, the pressurizing pipe 6 is vertically arranged and fixed on the middle fixing frame 17 and the lower fixing frame 18, the ascending section is fixed on the lower fixing frame 18, the detection chamber 11 is fixed on the middle fixing frame 17, the oil outlet pipe 16 is vertically arranged and fixed on the middle fixing frame 17 and the lower fixing frame 18, the flow meter 15 and the flow valve 14 are both located between the middle fixing frame 17 and the lower fixing frame 18, and the control module 13 is located at the upper part of the detection box 1. Specifically, the middle fixing frame 17 and the lower fixing frame 18 are horizontally arranged fixed brackets.

[0045] Example 2

[0046] See also Figure 1 Embodiment 2 provides an online detection device for the conductivity of rolling oil, and its structure is basically the same as that of embodiment 1, except that: the online detection device for the conductivity of rolling oil in this embodiment also includes a first valve 3, a second valve 7, a third valve 9 and a bypass pipe 5. The first valve 3, the second valve 7, the third valve 9 and the bypass pipe 5 cooperate to realize the flushing of the pipeline. The first valve 3 is arranged on the oil inlet pipe 2 and is located upstream of the pipeline filter 4, and the second valve 7 and the third valve 9 are both arranged on the pressurizing pipe 6. One end (specifically, the left end) of the bypass pipe 5 is connected to the oil inlet pipe 2 and is located between the pipeline filter 4 and the solenoid valve 8, and the other end (specifically, the right end) is connected to the pressurizing pipe 6 and is located between the second valve 7 and the third valve 9. The third valve 9 is located above the bypass pipe 5, and the second valve 7 is located below the bypass pipe 5.

[0047] During testing, the solenoid valve 8, the first valve 3, the second valve 7 and the third valve 9 are all opened. During flushing, the corresponding valves are closed as needed. For example, when flushing the pipeline filter 4 and the pipeline where it is located, the solenoid valve 8 and the second valve 7 are closed; when flushing the solenoid valve 8 and the pipeline where it is located, the first valve 3 and the second valve 7 are closed; and so on.

[0048] Specifically, the bypass pipe 5 is arranged horizontally and is located between the middle fixing frame 17 and the lower fixing frame 18 , the first valve 3 is located above the middle fixing frame 17 , the third valve 9 is located above the middle fixing frame 17 , and the second valve 7 is located between the middle fixing frame 17 and the lower fixing frame 18 .

[0049] Example 3

[0050] See also Figure 1Embodiment 3 provides an online detection device for the conductivity of rolling oil, and its structure is basically the same as that of Embodiment 1, except that: the oil inlet pipe 2 in this embodiment is located in the left part of the detection box 1, and its starting end passes through the upper part of the left side of the detection box 1. The oil outlet pipe 16 is located in the right part of the detection box 1, and its end passes through the bottom of the right side of the detection box 1. The detection chamber 11 is located in the middle right part of the detection box 1. The pressurized pipe 6 is located in the middle left part of the detection box 1. The control module 13 is located in the upper right corner of the detection box 1.

[0051] Example 4

[0052] See also Figure 2 Embodiment 4 provides a rolling oil purification system with fire prevention function, which includes a dirty oil tank, a filtering device, a clean oil tank and any of the rolling oil conductivity online detection devices disclosed in Embodiments 1-3, etc. The dirty oil tank, the filtering device and the clean oil tank are connected in sequence through a pipeline (on which a conveying structure is arranged as needed). The dirty oil tank and the clean oil tank are used to store the rolling oil before and after filtration, respectively, and the filtering device can be specifically a plate filter. The starting end of the oil inlet pipe 2 is connected to the sampling port on the outlet of the filtering device through a pipeline, and the rolling oil flows into the rolling oil conductivity online detection device by gravity. The end of the oil outlet pipe 16 is connected to the dirty oil tank through a pipeline, and the rolling oil is pressurized and transported through the pressure pipe 6.

[0053] Specifically, the filtering device in the embodiment of the utility model is higher than the dirty oil tank and the clean oil tank, and the online detection device for the conductivity of the rolling oil is located next to the dirty oil tank.

[0054] Among them, "first", "second" and "third" in this embodiment only have a distinguishing function and have no other special meanings.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An online detection device for the conductivity of rolling oil, characterized in that: The invention comprises a detection box (1) and a control module (13) therein, a pressurizing pipe (6), an oil inlet pipe (2), an oil outlet pipe (16), a pipeline filter (4), a solenoid valve (8), a detection chamber (11), a conductivity meter (12), a flow valve (14) and a flow meter (15); the detection chamber (11) is arranged vertically; the conductivity meter (12) is arranged at the top of the detection chamber (11) and its probe extends into the middle or lower part of the detection chamber (11); the end of the oil inlet pipe (2) is connected to the bottom of the detection chamber (11) and a pipeline filter (4), a solenoid valve (8) and a pressurizing pipe (6) are arranged thereon in sequence; the beginning of the oil outlet pipe (16) is connected to the upper part of the detection chamber (11) and a flow valve (14) and a flow meter (15) are arranged thereon; the pressurizing pipe (6) is connected to a compressed air supply structure through a pipeline; the solenoid valve (8) and the conductivity meter (12) are electrically connected to the control module (13).

2. The rolling oil conductivity online detection device according to claim 1 is characterized in that: The detection chamber (11) is arranged in the middle of the detection box (1), the starting end of the oil inlet pipe (2) passes through the upper part of one side of the detection box (1), and the end of the oil outlet pipe (16) passes through the bottom of the other side of the detection box (1).

3. The rolling oil conductivity online detection device according to claim 2 is characterized in that: The oil inlet pipe (2) first extends vertically downward to the lower part of the detection box (1), then extends horizontally to the bottom of the detection chamber (11), and finally extends vertically upward to the bottom of the detection chamber (11); the pipeline filter (4) and the solenoid valve (8) are arranged on the descending section of the oil inlet pipe (2), and the pressurizing pipe (6) is arranged on the upper side of the horizontal section of the oil inlet pipe (2).

4. The rolling oil conductivity online detection device according to claim 3 is characterized in that: The upper end of the pressure pipe (6) is higher than the connection point between the detection chamber (11) and the oil outlet pipe (16).

5. The rolling oil conductivity online detection device according to claim 3 is characterized in that: The device further comprises a first valve (3), a second valve (7), a third valve (9) and a bypass pipe (5); the first valve (3) is arranged on the oil inlet pipe (2) and is located upstream of the pipeline filter (4); the second valve (7) and the third valve (9) are both arranged on the pressurizing pipe (6); one end of the bypass pipe (5) is connected to the oil inlet pipe (2) and is located between the pipeline filter (4) and the solenoid valve (8); the other end of the bypass pipe (5) is connected to the pressurizing pipe (6) and is located between the second valve (7) and the third valve (9); during detection, the first valve (3), the second valve (7) and the third valve (9) are all opened.

6. The rolling oil conductivity online detection device according to claim 5, characterized in that: A middle fixing frame (17) and a lower fixing frame (18) are respectively provided in the middle and lower parts of the detection box (1), a descending section of the oil inlet pipe (2) is fixed on the middle fixing frame (17) and the lower fixing frame (18), the bypass pipe (5) is arranged horizontally and is located between the middle fixing frame (17) and the lower fixing frame (18), the pipeline filter (4) is located above the middle fixing frame (17), the solenoid valve (8) is located between the middle fixing frame (17) and the lower fixing frame (18), and the pressurizing pipe (6) is arranged vertically. The detection box (1) is vertically arranged and fixed on a middle fixing frame (17) and a lower fixing frame (18); the ascending section of the oil inlet pipe (2) is fixed on the lower fixing frame (18); the detection chamber (11) is fixed on the middle fixing frame (17); the oil outlet pipe (16) is vertically arranged and fixed on the middle fixing frame (17) and the lower fixing frame (18); the flow meter (15) and the flow valve (14) are both located between the middle fixing frame (17) and the lower fixing frame (18); and the control module (13) is located on the upper part of the detection box (1).

7. The rolling oil conductivity online detection device according to claim 1 is characterized in that: The conductivity meter (12) is a CM-08B oil conductivity meter.

8. The rolling oil conductivity online detection device according to claim 7, characterized in that: The detection chamber (11) is a cylindrical structure with a conical bottom, and is coaxially arranged with a probe of the conductivity meter (12).

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