Cold and hot rolled steel surface residual oil sampling device and method

Abstract

The invention provides a cold hot rolled steel surface residual oil sampling device and method, the sampling device comprises a frame body and a rectangular brush body, and an effective gap is arranged in the frame body; the rectangular brush body is connected with the frame body in a sliding mode, the brush face is flush with the bottom face of the frame body, and the frame body is made of glass silica gel materials. The rectangular brush body comprises a brush body, a brush head is arranged at the bottom of the brush body, and a handle is arranged at the top end of the brush body; the sampling device is simple in structure, convenient to operate and short in single-time sampling time, the sampling time is greatly shortened, residual oil samples on the surface of the steel can be rapidly obtained, the detection efficiency is improved, the downtime is greatly shortened, waste materials generated by downtime are reduced, production raw materials are saved, after sampling, a solubility test is carried out in a laboratory, and the production cost is reduced. Meanwhile, on-site chemical operation is avoided, and the safety of operators is effectively protected.

Description

Technical Field

[0001] The present invention relates to the technical field of galvanizing and aluminizing production lines, and more particularly, to a device and method for sampling residual oil on the surface of cold-rolled and hot-rolled steel. Background Art

[0002] The TKAS galvanizing production line and aluminizing production line can produce galvanized (GI / GA) products and aluminum (AS) products with a full range of specifications from 0.38 to 3.5 in thickness. It includes products such as hot-rolled base, automotive outer panels, high-strength, and hot-forming sheets. Especially for high-grade sheet products such as automotive outer panels, customers have extremely high requirements for the surface quality of the sheets. The surface residual oil of the production raw materials needs to be detected every 8 hours during production, and special products need to be inspected every 2 hours. Among them, the surface cleanliness (residual oil and residual iron) components have a greater impact on the surface adhesion and defect state. During production, manual sampling at regular intervals is required.

[0003] In the traditional sampling process, it is necessary to carry instruments to demarcate the unit area, and at the same time carry test consumables such as dissolving liquids. Two people need to work on-site simultaneously, and the downtime needs to meet more than 60 minutes. The downtime operation time is long, resulting in a large amount of waste and low sampling efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for sampling residual oil on the surface of cold-rolled and hot-rolled steel, aiming to solve the problems of long downtime operation time, a large amount of waste, and low sampling efficiency in the existing sampling operation.

[0005] The present invention is achieved through the following technical solutions: It includes a frame body and a rectangular brush body. There is an effective gap inside the frame body; the rectangular brush body is slidably connected to the frame body, and the brush surface is flush with the bottom surface of the frame body.

[0006] To better implement the present invention, further, the dimensions of the frame body are 330 mm ± 2 mm in length, 260 mm ± 2 mm in width, and 30 mm ± 1 mm in height.

[0007] To better implement the present invention, further, the material of the frame body is glass silicone material.

[0008] To better implement the present invention, further, the rectangular brush body includes: a brush body, a brush head is provided at the bottom of the brush body, and a handle is provided at the top of the brush body.

[0009] To better implement the present invention, further, the gap inside the frame body 1 is adapted to the size of the wiping paper.

[0010] A method for sampling residual oil on the surface of cold-rolled and hot-rolled steel, the sampling method includes the following steps:

[0011] Step 1: Before the strip cleaning process section

[0012] a. During the strip steel downtime gap, place the frame body on the strip steel surface;

[0013] b. Lay the wiping paper flat in the effective gap within the frame;

[0014] c. Use a rectangular brush body to brush flatly, remove the wiping paper for encapsulation, and obtain the residual oil amount per unit area of the strip steel before cleaning;

[0015] Step 2: After the strip steel cleaning process section

[0016] d. Use a new wiping paper and repeat the above steps a - c to obtain the residual oil amount per unit area of the strip steel after cleaning;

[0017] Step 3: Laboratory analysis

[0018] e. Add extraction agent to dissolve the residual oil amounts on the two wiping papers respectively, measure the difference in the oil amounts of the wiping papers through the equipment, and determine the cleanliness of the material surface.

[0019] To better implement the present invention, further, the extraction agent in Step 3 is n - hexane.

[0020] To better implement the present invention, further, the equipment in Step 3 uses an ultraviolet spectrophotometer or a gas chromatograph to measure the oil amount.

[0021] The beneficial effects of the present invention are as follows: The sampling device of the present invention has a simple structure, is convenient to operate, has a short single - sampling time, greatly shortens the sampling time, can quickly obtain the residual oil sample on the steel surface, improves the detection efficiency, greatly shortens the downtime, reduces the waste generated during downtime, saves production raw materials, conducts the solubility test through sampling and then operates in the laboratory, and at the same time avoids on - site chemical operations, effectively protecting the safety of operators. Brief Description of the Drawings

[0022] To more clearly illustrate the technical solutions of the present invention, the following will briefly introduce the drawings required in the present invention. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the frame body in the present invention;

[0024] Figure 2 is Figure 1 a schematic diagram of the cross - sectional result of

[0025] Figure 3 It is a schematic structural diagram of the rectangular brush body in the present invention;

[0026] Figure 4 Side view structure schematic diagram of Figure 3

[0027] Icon: 1. Frame body; 2. Rectangular brush body; 21. Brush body; 22. Brush head; 23. Handle. Specific implementation mode

[0028] The technical solutions in the present invention will be described below with reference to the accompanying drawings in the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0030] Example 1 (Sampling of hot-rolled steel),

[0031] Please refer to Figures 1-4 , a device and method for sampling residual oil on the surface of hot and cold rolled steel provided by the present invention. The sampling device includes a frame body 1 and a rectangular brush body 2. An effective gap is provided inside the frame body 1; the rectangular brush body 2 is slidably connected to the frame body 1, and the brush surface is flush with the bottom surface of the frame.

[0032] Furthermore; the size of the frame body is 330 mm ± 2 mm in length, 260 mm ± 2 mm in width, and 30 mm ± 1 mm in height. The material of the frame body 1 is glass silicone material. The rectangular brush body 2 includes: a brush body 21, a brush head 22 is provided at the bottom of the brush body 21, and a handle 23 is provided at the top of the brush body 21. The gap inside the frame body 1 is adapted to the size of the wiping paper.

[0033] In this embodiment, by providing a frame body 1, wherein the size of the frame body 1 is 330 mm ± 2 mm in length, 260 mm ± 2 mm in width, and 30 mm ± 1 mm in height, a gap groove is provided on the inner side of the bottom of the frame body 1. By placing the wiping paper in the gap groove, the two are adapted to each other, which is convenient to press the wiping paper on the strip surface through the frame body 1 to ensure that the wiping paper is flat and adheres to the strip. By providing a rectangular brush body 2, wherein the rectangular brush body 2 includes a brush body 21, a brush head 22 and a handle 23, the brush head 22 is used to brush flat on the wiping paper. By providing a handle 23, it is convenient for the staff to hold the handle 23, which is convenient for the staff to operate.

[0034] A method for sampling residual oil on the surface of hot and cold rolled steel, the sampling method includes the following steps:

[0035] Step 1: Before the strip cleaning process section

[0036] ​a. The strip stop gap, place the frame body 1 on the strip surface;

[0037] b. Lay the wiping paper flat in the effective gap inside the frame;

[0038] c. Use the rectangular brush body 2 to brush flatly, remove the encapsulated wiping paper, and obtain the residual oil amount per unit area of the strip before cleaning;

[0039] Step 2: After the strip cleaning process section

[0040] d. Use a new wiping paper, repeat the above steps a - c, and obtain the residual oil amount per unit area of the strip after cleaning;

[0041] Step 3: Laboratory analysis

[0042] e. Add the extractant to dissolve the residual oil amounts of the two wiping papers respectively, measure the difference in the oil amounts of the wiping papers through the equipment, and determine the surface cleanliness.

[0043] In Step 3, the extractant is n - hexane.

[0044] In Step 3, the equipment uses an ultraviolet spectrophotometer or a gas chromatograph to measure the oil amount.

[0045] In this embodiment, select a high - temperature - resistant wiping paper adapted according to the process section, lay the wiping paper flat in the gap of the frame body, and ensure that the wiping paper completely covers the gap;

[0046] Fixing device: Use the frame body to closely fit on the surface of the steel, so that the wiping paper contacts the surface of the steel;

[0047] Wiping operation: Use the cuboid brush body to brush back and forth flatly on the wiping paper 5 - 10 times with a fixed pressure of 0.5 - 1 kg, ensuring that the residual oil is fully transferred to the wiping paper; Sample collection: Collect the wiping paper with residual oil and mark the process section and the sampling position;

[0048] Laboratory analysis: Place the wiping paper in a centrifuge tube, add a special extractant, shake to dissolve the residual oil, measure the oil amount through an ultraviolet spectrophotometer or a gas chromatograph, calculate the residual oil amount per unit area, and evaluate the surface cleanliness by comparing with the cleanliness standard.

[0049] Example 2 (Sampling of cold - rolled steel),

[0050] Please refer to Figures 1-4 , A device and method for sampling residual oil on the surface of hot - rolled and cold - rolled steel provided by the present invention. The sampling device includes a frame body 1 and a rectangular brush body 2. The frame body 1 is internally provided with an effective gap; the rectangular brush body 2 is slidably connected to the frame body 1, and the brush surface is flush with the bottom surface of the frame.

[0051] Furthermore, the dimensions of the frame body are 330 mm ± 2 mm in length, 260 mm ± 2 mm in width, and 30 mm ± 1 mm in height. The material of the frame body 1 is glass silicone. The rectangular brush body 2 includes a brush body 21, with a brush head 22 provided at the bottom of the brush body 21 and a handle 23 provided at the top of the brush body 21. The gap inside the frame body 1 is adapted to the size of the wiping paper.

[0052] In this embodiment, by providing a frame body 1, where the dimensions of the frame body 1 are 330 mm ± 2 mm in length, 260 mm ± 2 mm in width, and 30 mm ± 1 mm in height, and a gap groove is provided inside the bottom of the frame body 1. By placing the wiping paper in the gap groove, the two are mutually adapted, facilitating the pressing of the wiping paper on the strip surface through the frame body 1 to ensure that the wiping paper is flat and adheres to the strip. By providing a rectangular brush body 2, where the rectangular brush body 2 includes a brush body 21, a brush head 22, and a handle 23, the brush head 22 is used to brush flat on the wiping paper. By providing a handle 23, it is convenient for the staff to hold the handle 23, facilitating the operation of the staff.

[0053] A method for sampling residual oil on the surface of hot and cold rolled steel, the sampling method comprising the following steps:

[0054] Step 1: Before the strip cleaning process section

[0055] a. During the strip stop gap, place the frame body 1 on the strip surface;

[0056] b. Lay the wiping paper flat in the effective gap inside the frame;

[0057] c. Use the rectangular brush body 2 to brush flat, remove the wiping paper and package it to obtain the residual oil amount per unit area of the strip before cleaning;

[0058] Step 2: After the strip cleaning process section

[0059] d. Use a new wiping paper and repeat the above steps a - c to obtain the residual oil amount per unit area of the strip after cleaning;

[0060] Step 3: Laboratory analysis

[0061] e. Add an extraction agent to dissolve the residual oil amounts of the two wiping papers respectively, and measure the difference in the oil amounts of the wiping papers through equipment to determine the cleanliness of the material surface.

[0062] The extraction agent in Step 3 is n - hexane.

[0063] The equipment in Step 3 uses an ultraviolet spectrophotometer or a gas chromatograph to measure the oil amount.

[0064] In this embodiment, select a low - temperature - resistant wiping paper adapted according to the process section, lay the wiping paper flat in the gap of the frame body to ensure that the wiping paper completely covers the gap;

[0065] Fixing device: The frame body is closely attached to the surface of the steel, so that the wiping paper is in contact with the surface of the steel;

[0066] Wiping operation: Use a cuboid brush body to brush back and forth on the wiping paper 5 - 10 times with a fixed pressure. The fixed pressure is 0.5 - 1 kg to ensure that the residual oil is fully transferred to the wiping paper; Sample collection: Collect the wiping paper with residual oil and mark the process section and sampling location;

[0067] Laboratory analysis: Place the wiping paper in a centrifuge tube, add a special extraction agent, shake to dissolve the residual oil, measure the oil volume through an ultraviolet spectrophotometer or a gas chromatograph, calculate the residual oil volume per unit area, and evaluate the surface cleanliness by comparing with the cleanliness standard.

[0068] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A sampling device for residual oil on the surface of hot-rolled and cold-rolled steel, characterized in that, It includes a frame body (1) and a rectangular brush body (2). An effective gap is provided inside the frame body (1). The rectangular brush body (2) is slidably connected to the frame body (1), and the brush surface is flush with the bottom surface of the frame.

2. The surface residual oil sampling device for cold and hot rolled steel according to claim 1, wherein, The dimensions of the frame body are 330 mm ± 2 mm in length, 260 mm ± 2 mm in width, and 30 mm ± 1 mm in height.

3. The surface residual oil sampling device for cold and hot rolled steel according to claim 1, characterized in that, The frame body (1) is made of glass silicone material.

4. The surface residual oil sampling device for hot and cold rolled steel according to claim 1, characterized in that, The rectangular brush body (2) includes: a brush body (21), a brush head (22) is provided at the bottom of the brush body (21), and a handle (23) is provided at the top of the brush body (21).

5. A sampling device for residual oil on the surface of hot and cold rolled steel according to claim 1, characterized in that, The gap inside the frame body (1) is adapted to the size of the wiping paper.

6. A sampling method for residual oil on the surface of hot-rolled and cold-rolled steel, characterized in that, Using the device for sampling residual oil on the surface of hot-rolled and cold-rolled steel as described in any one of claims 1-5, the sampling method includes the following steps: Step 1: Before the strip cleaning process section a. During the strip stop gap, place the frame body (1) on the strip surface; b. Lay the wiping paper flat in the effective gap inside the frame; c. Use the rectangular brush body (2) to brush flat, remove the wiping paper package, and obtain the residual oil amount per unit area of the strip before cleaning; Step 2: After the strip cleaning process section d. Use a new wiping paper and repeat the above steps a-c to obtain the residual oil amount per unit area of the strip after cleaning; Step 3: Laboratory analysis e. Dissolve the residual oil amounts of the two wiping papers by adding an extraction agent respectively, and measure the difference in the oil amounts of the wiping papers through the equipment to determine the cleanliness of the material surface.

7. A method for sampling residual oil on the surface of hot and cold rolled steel according to claim 6, characterized in that: The extraction agent in step 3 is n-hexane.

8. A method for sampling residual oil on the surface of cold and hot rolled steel according to claim 6, characterized in that: The equipment in step 3 uses an ultraviolet spectrophotometer or a gas chromatograph to measure the oil amount.

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