Polishing device

Abstract

The utility model relates to a polishing device which comprises a polishing pool, installation frames are arranged on the two sides of the top of the polishing pool respectively, lifting adjusting assemblies are arranged on the installation frames, a fixing base is further movably installed in the polishing pool, clamping assemblies are further arranged at the two ends of the fixing base, and conducting strips are arranged in the clamping assemblies. A cable is mounted at the top of the fixed seat through a sealing ring, and is electrically connected with the conducting strip; a liquid inlet pipe and a liquid discharge pipe are further arranged on the side wall of the polishing pool, and a filter part is further arranged on the liquid discharge pipe; compared with the prior art, improvement is conducted on the basis of existing polishing equipment, an electric polishing mode and an ultrasonic resonance mode are combined, meanwhile, the fixing base for assisting material changing is additionally arranged at the top of the polishing pool, auxiliary feeding and discharging operation can be effectively conducted, and the situation that due to slow feeding and discharging, the equipment downtime is long, and the production efficiency is improved is avoided. And the inner wall and the outer wall of the whole drill rod can be rapidly processed through cooperation with the polishing structure, use is more convenient, and the production efficiency is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting equipment technology, specifically to a polishing device. Background Technology

[0002] Oil drill pipe is an indispensable tool in the oil drilling process. The structure is mostly spliced, that is, multiple drill pipe sections are combined to make it suitable for oil extraction at various depths. The inside of the drill pipe is hollow to assist in the transportation of drilling fluid or to assist in the exploration of depth.

[0003] During the production of oil drill pipes, both the inner and outer surfaces of the drill pipe need to be polished. Existing polishing equipment mostly uses mechanical polishing. Although this polishing method can make the outer wall of the drill pipe smooth, the drill pipe body is long, and its inner wall cannot be effectively polished.

[0004] In addition, in existing polishing equipment, the drill rod requires manual assistance for loading and unloading, which causes the equipment to stop working during the material change process, thus affecting production efficiency. Utility Model Content

[0005] Based on the above description, this utility model provides a polishing device to solve the shortcomings of existing oil drill pipe polishing equipment, which mostly adopts mechanical polishing, which not only cannot effectively polish the inner and outer walls of the drill pipe, but also has a slow material changing speed, affecting production efficiency.

[0006] This utility model is achieved through the following technical solution:

[0007] A polishing device includes a polishing tank, with mounting brackets on both sides of the top of the polishing tank. Each mounting bracket has a lifting and adjusting assembly. A fixed base is movably mounted inside the polishing tank. The lifting and adjusting assembly extends vertically downwards and is fixedly connected to the four corners of the top surface of the fixed base, driving the fixed base to rise and fall vertically. Clamping assemblies are also provided at both ends of the fixed base. Conductive plates are provided inside the clamping assemblies. A cable is installed on the top of the fixed base via a sealing ring, and the cable is electrically connected to the conductive plates. An inlet pipe and an outlet pipe are also provided on the sidewalls of the polishing tank, with a filter element provided on the outlet pipe.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the fixing base is configured as a rectangular frame with multiple arc-shaped grooves on its surface. Each arc-shaped groove has several drainage holes on its bottom surface. The top surface of the polishing pool is also provided with a loading fixture and a unloading fixture on both sides. The loading fixture and the unloading fixture are provided with guide grooves and are arranged concentrically with the arc-shaped grooves. An electric push rod is also provided on one side of the loading fixture to push the workpiece into the fixing base.

[0010] Furthermore, the clamping assembly includes positioning rings disposed at both ends of the arc-shaped groove. The inner ring surface of the positioning ring is provided with an installation groove, and an airbag is embedded in the installation groove. The fixing seat is also provided with an air supply pipe that communicates with the airbag. The air supply pipe extends upward and is externally connected to an air pump.

[0011] Furthermore, both the front and rear ends of the inner wall of the airbag are corrugated, and multiple conductive sheets are arranged around the middle of the airbag body. The multiple conductive sheets are lifted by the airbag and closely adhere to the surface of the clamped component.

[0012] Furthermore, the positioning ring is provided with guide rollers on its annular end face, and multiple guide rollers are arranged in a circumferential array.

[0013] Furthermore, the lifting and adjusting assembly includes a winch fixedly installed on the mounting frame, on which a steel wire rope is installed. The steel wire rope extends vertically downward and is hoisted to the top surface of the fixed seat through the cooperation of a pulley block and a lifting ring.

[0014] Furthermore, the filter element includes a cylindrical body, and a filter cylinder is provided inside the filter element. The surface of the filter cylinder is surrounded by filter holes and covered with a filter membrane. A recovery pipe is provided on one side of the filter element and connected to the interior of the filter element. The other end of the recovery pipe is connected to a recovery tank.

[0015] Furthermore, the top and bottom of the filter cartridge extend to the outside of the filter element and form interfaces, wherein the interface at the top is connected to the drain pipe and a first solenoid valve is provided at the connection point, and the interface at the bottom is connected to the sewage pipe and a second solenoid valve is provided at the connection point.

[0016] Furthermore, an ultrasonic generator is provided at the bottom of the polishing tank, and the output end of the ultrasonic generator is fixedly connected to the bottom surface of the polishing tank.

[0017] Furthermore, the polishing tank is also equipped with an electric heater and a temperature sensor.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0019] This application improves upon existing polishing equipment by combining electropolishing and ultrasonic resonance, and adds an auxiliary material changing base to the top of the polishing tank. This not only effectively assists in loading and unloading operations, avoiding long downtime due to slow loading and unloading, but also works with the aforementioned polishing structure to quickly process the inner and outer walls of the entire drill rod, making it more convenient to use and effectively improving production efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the polishing tank in this embodiment;

[0021] Figure 2 This is a schematic diagram of the structure of the fixing base in this embodiment;

[0022] Figure 3 This is a schematic diagram of the positioning ring in this embodiment;

[0023] Figure 4 This is a schematic diagram of the airbag structure in this embodiment;

[0024] Figure 5 This is a schematic diagram of the filter element in this embodiment;

[0025] The components include: 1. Polishing tank; 11. Inlet pipe; 12. Drain pipe; 2. Mounting frame; 21. Lifting and adjusting assembly; 3. Fixing base; 31. Arc-shaped groove; 32. Drain hole; 4. Clamping assembly; 41. Positioning ring; 42. Mounting groove; 43. Airbag body; 44. Conductive sheet; 45. Guide roller; 5. Filter element; 51. Filter cartridge; 52. First solenoid valve; 53. Second solenoid valve. Detailed Implementation

[0026] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0027] 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.

[0028] Combination Figure 1-5 As shown, a polishing apparatus includes:

[0029] Polishing pool 1 is a pool used to hold electrolytic polishing liquid so that the entire drill rod can be immersed in it for electrolytic polishing. It has an inlet pipe 11 and an outlet pipe 12 on its side wall, and valves are provided on both pipes.

[0030] Mounting frame 2 is set on both sides of polishing pool 1 and forms a support structure on the top surface. A lifting adjustment component 21 is provided on the top surface to drive the drill rod into polishing pool 1 or to remove it.

[0031] The fixing seat 3 is slidably installed inside the polishing pool 1 to assist in fixing the drill rod;

[0032] The clamping component 4 is set on the fixed base 3. It clamps and fixes both ends of the drill rod by inflating it, and at the same time provides a certain support, so that the drill rod is lifted up and maintains a certain distance from the bottom surface of the fixed base 3, ensuring that the outer wall of the drill rod can be effectively electrolytically polished.

[0033] The filter element 5 is located at the bottom of the polishing tank 1. It separates the metal impurities in the liquid through filtration and then discharges the separated solution back into the polishing tank 1 for recycling.

[0034] Specifically, in this embodiment, the fixing base 3 is set as a rectangular frame, that is, made of multiple plastic materials or other non-conductive materials, and an arc-shaped groove 31 is provided on its top surface. Several drainage holes 32 are also provided through the bottom surface of the arc-shaped groove 31. Therefore, when the entire fixing base is immersed in the polishing liquid, the polishing liquid can quickly contact the outer wall of the drill rod through these drainage holes 32. When the fixing base 3 leaves the polishing liquid, the polishing liquid can quickly separate from the fixing base 3 through these drainage holes 32, thereby effectively avoiding water stains remaining on the fixing base 3.

[0035] In addition, loading and unloading fixtures are provided on both sides of the rectangular frame. The structures of the loading and unloading fixtures are the same as those of the rectangular frame and are arranged in a left-right alignment. An electric push rod should be provided on one side of the loading fixture to push the drill rods delivered to the fixture directly into the rectangular frame, thereby completing the auxiliary loading work. On the other side of the unloading fixture, a robotic arm or other auxiliary unloading structure can be provided to assist in unloading the drill rods that have been pushed out of the fixed seat 3. This greatly shortens the material change time for loading and unloading the drill rods on the fixed seat 3, allowing electrolytic polishing to be carried out continuously and greatly improving the production efficiency of the drill rods.

[0036] The clamping assembly 4 includes positioning rings 41 arranged on both sides of the arc-shaped groove 31 on the fixed base 3. The positioning rings 41 are integrally formed with the fixed base 3, and the inner ring surface of the positioning rings 41 is flush with the bottom surface of the arc-shaped groove 31. The inner ring surface of the positioning rings 41 is also provided with a mounting groove 42. The mounting groove 42 is filled with an airbag 43, and the air supply pipe of the airbag 43 extends upward and passes through to the outside of the fixed base 3 to connect to the air pump, and is equipped with an air valve.

[0037] Furthermore, a conductive structure, namely a conductive sheet 44 and a cable, is provided inside the fixed base 3. The conductive sheet 44 is fixedly installed on the airbag body 43. The conductive sheet 44 is made of a flexible conductive material, such as a graphene-polyimide composite conductive sheet 44. While maintaining the good flexibility of polyimide, it introduces the high conductivity of graphene. The cable passes through the airbag body 43 and is electrically connected to the conductive sheet 44. At the same time, after the airbag body 43 is fully inflated, it will quickly lift the conductive sheet 44, forcing it to fit tightly against the outer wall of the drill rod, thereby conducting the current in the cable into the drill rod, and performing electrolytic polishing in conjunction with the external polishing liquid.

[0038] When the conductive sheet 44 contacts the drill rod, a sealing is required at this point. Therefore, a corrugated sealing structure should be provided on the inner ring surface of the air bladder 43, and these corrugated structures are arranged on both sides of the conductive sheet 44. When the drill rod is clamped and fixed by the air bladder 43, these corrugated structures will fit tightly against the surface of the drill rod, and multiple sealing spaces will be formed by the corrugated structure fitting against the surface of the drill rod. This space is sealed by inflation to prevent external polishing fluid from entering and affecting normal conductivity.

[0039] In the above structure, since conductivity may cause the drill rod surface to heat up, the material of the air bladder 43 should be changed to a high-temperature resistant rubber material, such as silicone rubber or fluororubber, to avoid deformation of the rubber material due to heating, which would affect the clamping and sealing effect.

[0040] Since drill pipes are available in three types—R1 (18-22 feet), R2 (27-30 feet), and R3 (38-45 feet)—and have a slender structure, a guiding structure is needed to prevent the drill pipe sidewall from coming into contact with the inner wall of the arc-shaped groove 31 on the fixing seat 3, which would cause excessive friction when pushed into the fixing seat 3. This is achieved by equipping a guide roller 45 on the inner ring surface of the positioning ring 41. For example, [the following text is missing here, likely a continuation of the previous sentence]. Figure 3As shown, the guide roller 45 can effectively support the surface of the drill rod and also has a guiding function during the pushing process, making it very convenient to use. Based on this, the operator can appropriately increase the number of positioning rings 41 according to the actual length of the drill rod, or directly arrange the guide roller 45 on the inner wall of the arc-shaped groove 31 of the fixed seat 3 to avoid excessive friction between the drill rod and the fixed seat 3.

[0041] The lifting adjustment assembly 21 is a hoisting mechanism, such as the hoisting mechanism of a crane in the field of lifting machinery. Through the coordinated work of components such as the motor, coupling, brake, reducer, drum, and pulley block, it realizes the lifting and lowering of heavy objects (it can also be replaced by a lifting adjustment structure such as a cylinder, hydraulic cylinder, or electric telescopic rod). This allows the hoist to effectively use wire ropes and hooks to lift or lower the fixed seat 3, thereby achieving the lifting function. The hook and its matching lifting rings should be provided in four sets, located at the four corners of the fixed seat 3. If the fixed seat 3 is large, the number of the above-mentioned hoisting mechanisms can be appropriately increased to ensure sufficient power to pull the fixed seat 3.

[0042] A sliding groove is provided on the inner side wall of the polishing pool 1. The sliding groove is vertically arranged. A protrusion is provided on the outer side wall of the fixed seat 3 and is slidably inserted into the sliding groove. When the hoist pulls the fixed seat 3 to the highest position, the arc-shaped groove 31 on the fixed seat 3 is aligned with the external loading and unloading fixtures.

[0043] At the bottom of polishing tank 1, an ultrasonic generator is installed to drive the diffusion and mass transfer of ions in the electrolyte through ultrasonic resonance. In electropolishing, this helps to replenish ions consumed on the anode surface in a timely manner, maintaining the uniformity of ion concentration in the electrolyte, thus making the electropolishing process more stable and efficient. Simultaneously, the cavitation effect generated by the ultrasound can break down the viscous film on the anode surface, allowing fresh electrolyte to better contact the workpiece surface, promoting the anode dissolution reaction, and improving the electropolishing effect.

[0044] The filter element includes a cylindrical body, and a filter cylinder is provided inside the filter element 5. The surface of the filter cylinder is surrounded by filter holes and covered with a filter membrane. A recovery pipe is provided on one side of the filter element 5 and connected to the inside of the filter element 5. The other end of the recovery pipe is connected to the recovery tank. The top and bottom of the filter cylinder 51 extend to the outside of the filter element 5 and form interfaces. The interface at the top is connected to the drain pipe 12 and a first solenoid valve 52 is provided at the connection. The interface at the bottom is connected to the sewage pipe and a second solenoid valve 53 is provided at the connection. When the staff is removing impurities, they only need to open the solenoid valve periodically. There is no need to frequently disassemble and maintain it, which greatly improves the convenience of maintenance.

[0045] In addition, temperature sensors and electric heaters should be appropriately added inside the polishing tank 1. Multiple temperature sensors can be set to detect the temperature of the polishing fluid, while the electric heater is used to control the temperature of the material. For example, for stainless steel, the temperature of the electrolytic polishing fluid should be controlled at 50-80℃; for copper and copper alloys, the temperature of the electrolytic polishing fluid is usually controlled at 40-60℃; and for aluminum and aluminum alloys, the temperature of the polishing fluid is generally 20-40℃. The above structure is mainly used to facilitate the operator to control the temperature of the polishing fluid inside, ensuring that the drill rod is in the polishing fluid within the optimal temperature range.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A polishing apparatus, characterized in that, The polishing pool (1) includes a polishing tank (1), which has mounting brackets (2) on both sides of its top. The mounting brackets (2) are equipped with lifting and adjusting components (21). A fixed seat (3) is also movably installed inside the polishing pool (1). The lifting and adjusting components (21) extend vertically downward and are fixedly connected to the four corners of the top surface of the fixed seat (3) and drive the fixed seat (3) to rise and fall vertically. The fixed seat (3) is also equipped with clamping components (4) at both ends. The clamping components (4) are equipped with conductive sheets (44) inside. The top of the fixed seat (3) is equipped with a cable through a sealing ring. The cable is electrically connected to the conductive sheets (44). The side wall of the polishing pool (1) is also equipped with an inlet pipe (11) and an outlet pipe (12). The outlet pipe (12) is also equipped with a filter element (5).

2. The polishing apparatus according to claim 1, characterized in that, The fixed base (3) is set as a rectangular frame and has multiple arc-shaped grooves (31) on its surface. Each arc-shaped groove (31) has several drainage holes (32) on its bottom surface. The top surface of the polishing pool (1) is also provided with a loading fixture and a unloading fixture respectively. The loading fixture and the unloading fixture are provided with guide grooves and are arranged concentrically with the arc-shaped grooves (31). An electric push rod is also provided on one side of the loading fixture to push the workpiece into the fixed base (3).

3. The polishing apparatus according to claim 2, characterized in that, The clamping assembly (4) includes positioning rings (41) at both ends of the arc-shaped groove (31). The inner ring surface of the positioning ring (41) is provided with an installation groove (42). An airbag body (43) is embedded in the installation groove (42). The fixed base (3) is also provided with an air supply pipe that communicates with the airbag body (43). The air supply pipe extends upward and is connected to an air pump.

4. The polishing apparatus according to claim 3, characterized in that, The front and rear ends of the inner wall of the airbag body (43) are both corrugated. Multiple conductive sheets (44) are arranged around the middle position of the airbag body (43), and the multiple conductive sheets (44) are lifted by the airbag and closely attached to the surface of the clamped part.

5. The polishing apparatus according to claim 4, characterized in that, The positioning ring (41) is also provided with guide rollers (45) on its annular end face. Multiple guide rollers (45) are provided and arranged in a circular array.

6. The polishing apparatus according to claim 1, characterized in that, The lifting adjustment assembly (21) includes a hoist fixedly installed on the mounting frame (2), on which a wire rope is installed. The wire rope extends vertically downward and is hoisted to the top surface of the fixed seat (3) through the cooperation of pulley blocks and lifting rings.

7. The polishing apparatus according to claim 1, characterized in that, The filter element (5) includes a cylindrical body and a filter cylinder inside the filter element (5). The surface of the filter cylinder is surrounded by filter holes and covered with a filter membrane. A recovery pipe is provided on one side of the filter element (5) and connected to the inside of the filter element (5). The other end of the recovery pipe is connected to a recovery tank.

8. The polishing apparatus according to claim 7, characterized in that, The top and bottom of the filter cartridge (51) extend to the outside of the filter element (5) and form an interface. The interface at the top is connected to the drain pipe (12) and a first solenoid valve (52) is provided at the connection. The interface at the bottom is connected to the sewage pipe and a second solenoid valve (53) is provided at the connection.

9. The polishing apparatus according to claim 8, characterized in that, The bottom of the polishing pool (1) is also provided with an ultrasonic generator, and the output end of the ultrasonic generator is fixedly connected to the bottom surface of the polishing pool (1).

10. The polishing apparatus according to claim 1, characterized in that, The polishing tank (1) is also equipped with an electric heater and a temperature sensor.

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