Electromagnetic clamping device for grinding and polishing and using method

Abstract

The invention discloses an electromagnetic clamping device for grinding and polishing. The device comprises a piece hanging disc, neodymium magnets, an upper cover plate, iron sheets and through grooves. Wherein a plurality of clamping grooves with different sizes and types are formed in the bottom surface of the hanging piece disc, and the clamping grooves are used for placing hanging pieces to be ground and polished; a neodymium magnet is arranged on the bottom surface of the upper cover plate; a through groove is formed between the lower surface of the upper cover plate and the upper surface of the hanging plate; and the through groove is used for placing an iron sheet. According to the device, the hanging pieces can be rapidly and conveniently mounted and dismounted, and the working efficiency can be conveniently improved. And in the polishing process, fingers can be protected from being abraded by using the device disclosed by the invention.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas anti-corrosion, and particularly to an electromagnetic clamping device for grinding and polishing and a using method thereof. Background Art

[0002] In the exploitation of oil and gas wells containing acidic gases, the oil and gas well casing is in a high-pressure and high-temperature environment, and at the same time comes into contact with acidic gases such as CO2 and H2S, resulting in serious corrosion of the oil and gas pipelines; in addition, in the middle and late stages of development, water injection or CO2 injection has been started or is already being used for development. Due to unqualified water injection quality or the presence of acidic gases, the anti-corrosion of the casing will also be affected. The corrosion of the casing will directly affect the wellbore integrity, shorten the life cycle and production of the oil and gas well, increase the development cost, and have a significant impact on the safety production of personnel and the oilfield.

[0003] The corrosion coupon method technology is one of the most commonly used corrosion experiment and test methods in oilfields at home and abroad. The corrosion coupon method is an experimental method used to study the corrosion behavior of metal materials. It is to first coat a layer of covering with a specific thickness (such as silver sheet, copper sheet, etc.) on the surface of the metal sample to be tested, and then place it in the corrosion medium for corrosion experiment. During the experiment, the covering on the surface of the metal sample will be corroded, forming one or more holes, thereby exposing a part of the surface of the metal sample. The morphology and position of these exposed surfaces can be used to evaluate the corrosion behavior of the metal. By conducting corrosion experiments on multiple samples, a series of corrosion behaviors under different corrosion conditions can be obtained, so as to better understand the corrosion performance of the metal.

[0004] Therefore, in the corrosion coupon experiment, the surface grinding and polishing treatment of the coupon is a very important process. At present, manual grinding and polishing are adopted, and the quality of grinding almost depends on the experience and technology of technicians. There are large fluctuations in the quality error of the polished samples, and there is inconsistency in the flatness of the polished sample surface, resulting in large data fluctuations in the experimental results and affecting the experimental results and the evaluation of the corrosion performance of the material. Summary of the Invention

[0005] The purpose of the present invention is to provide an electromagnetic clamping device for grinding and polishing and a using method thereof to solve the above technical problems.

[0006] To achieve the above purpose, the present invention provides an electromagnetic clamping device for grinding and polishing, and the device includes: a coupon disk, a neodymium magnet, an upper cover plate, an iron sheet, and a through groove;

[0007] Wherein, a plurality of card slots with different size types are arranged on the bottom surface of the coupon disk, and the card slots are used for placing the coupon to be ground and polished; a neodymium magnet is arranged on the bottom surface of the upper cover plate; a through groove is formed between the lower surface of the upper cover plate and the upper surface of the coupon disk; and the through groove is used for placing the iron sheet.

[0008] The present invention also provides an application of an electromagnetic clamping device for grinding and polishing, and an application of the electromagnetic clamping device for grinding and polishing in the anti-corrosion of oil casing.

[0009] The present invention also provides a method for using an electromagnetic clamping device for grinding and polishing, including:

[0010] Install the specimen to be ground and polished on the clamping groove on the bottom surface of the specimen disk;

[0011] Insert an iron sheet into the through groove, and use the neodymium magnet arranged on the bottom surface of the upper cover plate to attract the specimen to be ground and polished;

[0012] Hold the upper end of the upper cover plate and start grinding.

[0013] The technical effects and advantages of the present invention:

[0014] 1. The device of the present invention can quickly and conveniently install and disassemble the specimen, which is convenient for improving work efficiency.

[0015] 2. During the grinding process, using the device of the present invention can protect fingers from being abraded.

[0016] 3. The device of the present invention can effectively control the parallelism of the grinding fixture through a level, ensuring the surface quality of the specimen grinding.

[0017] Other features and advantages of the present invention will be described in the subsequent description, and part of them will be obvious from the description, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the description and the drawings. Description of the Drawings

[0018] Figure 1 It is an overall schematic diagram of the electromagnetic clamping device for grinding and polishing;

[0019] Figure 2 It is another overall schematic diagram of the electromagnetic clamping device for grinding and polishing;

[0020] Figure 3 It is a bottom view of the electromagnetic clamping device for grinding and polishing;

[0021] Figure 4 It is a cross-sectional view of the electromagnetic clamping device for grinding and polishing;

[0022] Figure 5 It is a left view of the electromagnetic clamping device for grinding and polishing;

[0023] Reference numerals: 1 - hanging piece; 2 - hanging piece disc; 3 - through slot; 4 - upper cover plate; 5 - neodymium magnet; 6 - level; 7 - iron-nickel-cobalt alloy sheet; 8 - iron sheet; 9 - installation groove; 10 - locking screw; 11 - vertical card slot; 12 - horizontal card slot. Detailed implementation

[0024] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings provided by the present invention. Moreover, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have technical substance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0026] First, introduce the working principle of an electromagnetic clamping device for grinding and polishing: Install the hanging piece 1 to be polished in the hanging piece disc 2, insert the iron sheet 8, and the neodymium magnet 5 magnetically attracts and corrodes the hanging piece 1. Hold the handle structure of the upper cover plate 4 and press it on the sandpaper for grinding. After grinding, pull out the iron sheet 8, insert the iron-nickel-cobalt alloy sheet 7 to effectively isolate the magnetic force, and take out the corroded hanging piece. The operation is simple and the efficiency is improved.

[0027] The present invention discloses an electromagnetic clamping device for grinding and polishing, as Figure 1 and 2 shown, the device includes: a hanging piece disc 2, a neodymium magnet 5, an upper cover plate 4, an iron sheet 8, and a through slot 3.

[0028] Among them, the upper cover plate 4 is arranged above the hanging piece disc 2.

[0029] Among them, a plurality of card slots of different size types are arranged on the bottom surface of the hanging piece disc 2, and the card slots are used for installing the corroded hanging piece 1 specimen.

[0030] The card slots include: a vertical card slot 11 and a horizontal card slot 12. Preferably, there are 2 vertical card slots 11 and 3 horizontal card slots 12. Among them, several corrosion coupons can be installed in the vertical card slot 11 and the horizontal card slot 12 at the same time, and multiple specimens can be ground and polished at one time, improving the grinding efficiency. Moreover, the depth of the horizontal card slot 12 is 1 / 2 of the thickness of the coupon 1, and when placed vertically, the depth of the vertical card slot 11 is 2 / 3 of the height of the coupon 1, which is used to ensure the safe installation of the coupon and achieve effective grinding. Of course, the depth of the card slot can also be set according to actual needs, such as Figure 3 as shown

[0031] Among them, neodymium magnets 5 are arranged on the bottom surface of the upper cover plate 4, and the number of neodymium magnets 5 is preferably 3, such as Figure 4 as shown

[0032] Among them, openings for accessing the through slot 3 are provided on both sides of the coupon disk 2 (preferably the left side is the first side), and the thickness of the through slot 3 is the same as the height of the iron-nickel-cobalt alloy sheet 7 and the iron sheet 8

[0033] Mounting grooves 9 are provided on two adjacent sides of the first side of the coupon disk 2, and the mounting grooves are in a concave state. Step platforms are provided on both bottom sides of the upper cover plate 4 corresponding to the two adjacent sides of the coupon disk 2, and the step platforms are matched with the concave mounting grooves 9

[0034] Locking screws 10 are installed at the matching position of the upper cover plate 4 and the coupon disk 2. Preferably, there are 5 locking screws. The locking screws are installed along the horizontal direction on both sides of the coupon disk, and the locking screws pass through the coupon disk and are screwed into the inside of the upper cover plate. When the iron-nickel-cobalt alloy sheet 7 and the iron sheet 8 are inserted into the through slot 3, the surfaces of the coupon disk 2 and the upper cover plate 4 can be effectively fitted, such as Figure 5 as shown

[0035] Among them, a level 6 is installed on the top of the upper cover plate 4, which can keep the coupon horizontal and stable during operation, so as to improve the consistency of the surface quality of the same batch of coupons

[0036] The present invention provides an electromagnetic clamping device for grinding and polishing. The device includes: a coupon disk 2, neodymium magnets 5, an upper cover plate 4, an iron sheet 8, and a through slot 3; among them, a plurality of different types of card slots are arranged on the bottom surface of the coupon disk 2, and the card slots are used to place the coupon 1 to be ground and polished; neodymium magnets 5 are arranged on the bottom surface of the upper cover plate 4; a through slot 3 is formed between the lower surface of the upper cover plate 4 and the upper surface of the coupon disk 2; the through slot 3 is used to place the iron sheet 8

[0037] The device of the present invention can install and disassemble the coupon quickly and conveniently, which is convenient for improving work efficiency. During the grinding process, the device of the present invention can protect fingers from being scratched. Moreover, the parallelism of the grinding pendant can be effectively controlled through the level, ensuring the surface quality of the coupon grinding

[0038] The present invention also provides an application, which is the application of the electromagnetic clamping device for grinding and polishing in the anti-corrosion of oil casing.

[0039] The present invention also provides a method for using an electromagnetic clamping device for grinding and polishing, including: installing the specimen coupon 1 to be ground and polished on the card slot on the bottom surface of the coupon disk 2; inserting an iron sheet 8 into the through slot 3, and using the neodymium magnet 5 provided on the bottom surface of the upper cover plate 4 to hold the specimen coupon 1 to be ground and polished; starting to grind by holding the upper end of the upper cover plate 4.

[0040] Wherein, the upper cover plate 4 is arranged above the coupon disk 2.

[0041] Wherein, a plurality of card slots of different size types are arranged on the bottom surface of the coupon disk 2, and the card slots are used for installing the corrosion coupon 1 specimens.

[0042] The card slots include: a vertical card slot 11 and a horizontal card slot 12. Preferably, there are 2 vertical card slots 11 and 3 horizontal card slots 12. Among them, the vertical card slot 11 and the horizontal card slot 12 can install several corrosion coupons at the same time, and grind and polish multiple specimens at one time, improving the grinding efficiency. Moreover, the depth of the horizontal card slot 12 is 1 / 2 of the thickness of the coupon 1, and when placed vertically, the depth of the vertical card slot 11 is 2 / 3 of the height of the coupon 1, which is used to ensure the safe installation of the coupon and achieve effective grinding. Of course, the depth of the card slot can also be set according to actual needs, as Figure 3 shown.

[0043] Wherein, a neodymium magnet 5 is arranged on the bottom surface of the upper cover plate 4, and the number of neodymium magnets 5 is preferably 3, as Figure 4 shown.

[0044] Wherein, on both sides of the coupon disk 2 (preferably the left side is the first side), there are openings for accessing the through slot 3, and the thickness of the through slot 3 is the same as the height of the iron-nickel-cobalt alloy sheet 7 and the iron sheet 8.

[0045] On the two adjacent sides of the first side of the coupon disk 2, there are installation grooves 9, and the installation grooves are in a concave state. On the two bottom sides of the upper cover plate 4 corresponding to the two adjacent sides of the coupon disk 2, there are step platforms, and the step platforms match the concave installation grooves 9.

[0046] Locking screws 10 are installed at the matching position of the upper cover plate 4 and the coupon disk 2, preferably 5 locking screws. The locking screws are installed along the horizontal direction on both sides of the coupon disk, and the locking screws pass through the coupon disk and are screwed into the inside of the upper cover plate. After the iron-nickel-cobalt alloy sheet 7 and the iron sheet 8 are inserted into the through slot 3, the surfaces of the coupon disk 2 and the upper cover plate 4 can be effectively attached, as Figure 5 shown.

[0047] Wherein, a level 6 is installed on the top of the upper cover plate 4, which can keep the coupon horizontal and stable during operation to improve the surface quality consistency of the same batch of coupons.

[0048] Finally, it should be noted that the above are only 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electromagnetic clamping device for grinding and polishing, characterized in that, The device includes: a hanging plate disc (2), neodymium magnets (5), an upper cover plate (4), an iron sheet (8), and a through groove (3); Among them, a plurality of card slots of different size types are arranged on the bottom surface of the hanging plate disc (2), and the card slots are used to place the hanging plates (1) to be ground and polished; neodymium magnets (5) are arranged on the bottom surface of the upper cover plate (4); a through groove (3) is formed between the lower surface of the upper cover plate (4) and the upper surface of the hanging plate disc (2); the through groove (3) is used to place the iron sheet (8).

2. The device according to claim 1, characterized in that, The card slots include: a vertical card slot (11) for vertically placing the hanging plate (1) and a horizontal card slot (12) for horizontally placing the hanging plate (1); Among them, the groove thickness of the vertical card slot (11) is 2 / 3 of the height of the hanging plate (1); the groove thickness of the horizontal card slot (12) is 1 / 2 of the thickness of the hanging plate (1).

3. The device according to claim 2, characterized in that, The number of the horizontal card slots (12) is 3, and they are arranged in parallel on the bottom surface of the hanging plate disc (2).

4. The device according to claim 3, characterized in that, The number of the neodymium magnets (5) is 3, and the neodymium magnets (5) correspond to the positions of the 3 horizontal card slots (12).

5. The device according to claim 1, characterized in that, The device further includes: a Fe-Ni-Co alloy sheet (7) for being placed in the through groove (3) to isolate magnetic force.

6. The device according to claim 5, characterized in that, The Fe-Ni-Co alloy sheet (7), the iron sheet (8) and the through groove (3) have the same thickness.

7. The device according to claim 2, characterized in that, A notch for placing the iron sheet (8) into the through groove (3) is arranged on the side surface of the hanging plate disc (2); Among them, the direction of the notch is perpendicular to the arrangement direction of the horizontal card slot (12).

8. The device according to claim 7, characterized in that, Sunken installation grooves (9) are respectively arranged on two adjacent sides of the first side of the hanging plate disc (2); stepped platforms are respectively arranged on two sides of the bottom of the upper cover plate (4) corresponding to the two adjacent sides of the hanging plate disc (2), and the stepped platforms are matched with the sunken installation grooves (9).

9. The device according to claim 8, characterized in that, The stepped platform and the sunken installation groove (9) are fixed with a locking screw (10).

10. The device according to claim 8, characterized in that, The device further includes: a level (6), and the level (6) is arranged on the top of the upper cover plate (4) to ensure that the hanging plate is horizontal and stable during operation.

11. An application of an electromagnetic clamping device for grinding and polishing, characterized in that, The application of the electromagnetic clamping device for grinding and polishing in the anti-corrosion of oil casing pipes.

12. A method of using the device according to any one of claims 1-10, characterized in that, Including: Install the hanging plate (1) to be ground and polished on the card slots on the bottom surface of the hanging plate disc (2); Insert the iron sheet (8) into the through groove (3), and use the neodymium magnets (5) arranged on the bottom surface of the upper cover plate (4) to attract the hanging plate (1) to be ground and polished; Hold the upper end of the upper cover plate (4) by hand and start grinding.

Images