Composite plating device for inner surface and outer surface of tubular workpiece
By designing a composite plating device for inner and outer surfaces for tubular workpieces, using circulating plating solution and rotary shaking design, the problems of insufficient cations of the plating solution and single equipment functions in the prior art are solved, and the uniformity of the plating layer and the convenience of the equipment are achieved. .
Patent Information
- Application Number
- CN202420666267.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The prior art is difficult to meet the structural characteristics of the tubular workpiece with large lengths and slender inner holes. Especially when the anode is too thin during inner plating, the cation in the plating solution is too few, resulting in a long plating time and uneven inner surface plating, and the equipment function is single. , which covers a large area and is inconvenient to operate.
Design a composite plating device on the inner and outer surfaces. By sharing the circulation plating solution with the outer plating and inner plating, the cation content in the plating solution is increased, and the design is rotating and shaking of the anode rod to ensure uniform plating. The equipment integrates the inner and outer plating functions to reduce the land occupation. , improve operational convenience.
The problem of poor electroplating effect on the inner surface of the thin cylindrical structure is solved, the balance and quality of the inner and outer surface plating is improved, the equipment space is reduced, and the operation convenience and uniformity of the plating are improved.
Smart Images
Figure CN222182506U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of production of oil pumping tubular workpieces, in particular to a composite plating device for inner and outer surfaces of tubular workpieces. Background Art
[0002] The oil pump works in the high-temperature, high-pressure, corrosive formation fluid in the wellbore for a long time, and reciprocates several times per minute. The outer surface of the tubular workpiece on the oil pump needs to have high corrosion resistance, and the inner surface needs to have high wear resistance and corrosion resistance.
[0003] To this end, manufacturers improve the above performance by forming a coating on the surface of the workpiece. At present, the electroplating and chemical plating processes used are difficult to meet the structural characteristics of the tubular workpiece with a large length and a slender inner hole. In particular, during the internal plating, the anode penetrates the tubular workpiece and is immersed in the plating solution. Since the anode is too thin, there are too few cations in the plating solution, resulting in a long electroplating time, and the internal coating cannot be evenly attached, and even some areas have no coating;
[0004] In addition, the current equipment has a single function and can only coat the inner surface and the outer surface of the workpiece respectively through different processes and different equipment. Therefore, the equipment occupies a large area and is inconvenient to use and operate. Utility Model Content
[0005] The purpose of the utility model is to address the defects of the prior art and provide a composite plating device for the inner and outer surfaces of a tubular workpiece. The device can perform electroplating operations on the outer and inner surfaces of the tubular workpiece, and increase the cation content in the plating solution by sharing a circulating plating solution for the outer and inner electroplating, thereby solving the problem of poor electroplating effect on the inner surface of a thin cylindrical structure.
[0006] The technical solution of the utility model is: a composite plating device for inner and outer surfaces of a tubular workpiece, comprising a plating tank, an outer plating tank and an inner plating tank are arranged above the plating tank;
[0007] The two ends of the outer plating tank are separated into a cathode chamber and a liquid outlet chamber by a first partition and a second partition respectively, and a plating chamber is formed in the middle, a cathode terminal is provided in the cathode chamber, an anode plate is provided in the plating chamber, and a coaxially arranged U-shaped first slot and a second slot are provided on the first partition and the second partition;
[0008] Conductive shafts placed in the first slot and the second slot for fixing the two ends of the tubular workpiece are symmetrically arranged on both sides of the outer plating tank, the outer diameter of the conductive shaft is adapted to the second slot, the outer diameter of the tubular workpiece is adapted to the first slot, the tail of the conductive shaft is rotatably connected to the cathode terminal, the head of the conductive shaft is provided with a plug connected to the inner hole of the tubular workpiece, and the outer plating tank is provided with a first rotating mechanism for driving one of the conductive shafts;
[0009] There are two symmetrically distributed inner plating tanks, which are divided into an anode bin, a liquid inlet bin and a liquid return bin by a third partition plate and a fourth partition plate. A slide table is provided in the anode bin for transverse sliding connection, and an anode terminal is provided on the top of the slide table. A transport mechanism for driving the slide table to move back and forth is provided on one of the inner plating tanks;
[0010] The third partition plate, the fourth partition plate and the adjacent slot walls of the two inner plating slots are respectively provided with a coaxially arranged U-shaped third slot, a fourth slot and a fifth slot, the fourth slot and the fifth slot are rotatably connected with sleeves for connecting the ends of the tubular workpiece, and an anode rod is mounted in the two third slots, and the two ends of the anode rod are respectively coaxially passed through the sleeves on both sides and rotatably connected with the anode terminals on both sides;
[0011] A cathode rotating seat for electrically connecting to the outer peripheral surface of the tubular workpiece and a second rotating mechanism for driving the tubular workpiece to rotate are provided between the two inner plating tanks;
[0012] A circulation pump is provided in the plating liquid tank, and the outlet end of the circulation pump is connected to the electroplating tank and one of the liquid inlet tanks through two liquid outlet pipes respectively. The cathode tank, the liquid return tank and the other liquid inlet tank are connected to the plating liquid tank through the liquid return pipes respectively.
[0013] Preferably, the outer sliding sleeve of the conductive shaft is provided with a first blocking piece matched with the first slot, and the outer sliding sleeve of the sleeve is provided with a second blocking piece matched with the fourth slot.
[0014] Preferably, the bottom of the anode bin is connected to an overflow pipe which is in communication with the plating solution tank.
[0015] Preferably, the first rotating mechanism and the second rotating mechanism both include a first motor and a gear set, the gear set of the first rotating mechanism is used for transmission between the first motor and the conductive shaft, and the gear set of the second rotating mechanism is used for transmission between the first motor and the sleeve or tubular workpiece.
[0016] Preferably, the first rotating mechanism and the second rotating mechanism both include a first motor and a friction wheel mounted on the output shaft of the first motor, the first rotating mechanism drives the conductive shaft through the friction wheel, and the second rotating mechanism drives the sleeve or tubular workpiece through the friction wheel.
[0017] Preferably, the transport mechanism comprises a second motor and a crank-connecting rod assembly, and the second motor drives the slide to move via the crank-connecting rod assembly.
[0018] Preferably, a temperature detector, a pH detector and a liquid level detector are also provided for detecting the plating liquid contained in the plating liquid tank.
[0019] Preferably, a constant temperature heater is provided for controlling the temperature of the plating solution contained in the plating solution tank.
[0020] Preferably, the plating liquid tank is also provided with a rotating stirrer for stirring the plating liquid contained therein, and the electroplating chamber is provided with a pneumatic stirrer.
[0021] Compared with the prior art, the utility model has the following advantages:
[0022] The metal ions required for the coating are generated by the anode metal of the external plating tank and enter the circulating plating solution. They are used not only for the external plating process but also for the internal plating process. This method is suitable for the tubular workpiece, which has a long and slender inner cavity space and is not suitable for arranging large-sized anode metals. This method solves the problem of inconsistent metal content and materials in the internal and external plating layers of the workpiece and improves the balance of the anti-corrosion performance of the internal and external plating layers.
[0023] By rotating the tubular workpiece and mixing the inner cavity during the electroplating process, the uniform generation of the coating is improved;
[0024] In particular, the design of shaking and mixing the inner cavity of the tubular workpiece by swinging the anode rod can, on the one hand, improve the mixing uniformity of additives inside the plating solution, thereby improving the quality of the coating; on the other hand, the effect of the anode rod swinging can quickly remove the hydrogen generated in the electroplating process to avoid affecting the coating.
[0025] The utility model contacts the inner surface or outer surface of the tubular workpiece in a circulating flow manner to produce a coating. Compared with the traditional electroplating method, the coating is more uniform and the structure is more stable. In addition, the utility model has the functions of switching between inner plating operation, outer plating operation and inner and outer simultaneous operation, which is more convenient to use and suitable for different process requirements.
[0026] The utility model integrates the equipment for inner plating and outer plating of tubular workpieces, the equipment occupies a small space, is convenient for plating solution configuration, and monitors and controls various process parameters such as acidity, pH value and temperature. The plating solution tank, the outer plating tank and the inner plating tank are arranged separately and interconnected, which is convenient for heating and stirring the plating solution, and separately plating the inner surface of the tubular workpiece and the outer surface of the tubular workpiece. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of the utility model;
[0028] Figure 2 This is a schematic diagram of the use state of the utility model;
[0029] Figure 3 It is a schematic diagram of the structure of the outer plating tank;
[0030] Figure 4 It is a schematic diagram of the structure of the inner plating tank;
[0031] Figure 5 It is a schematic diagram of the bottom structure of the outer plating tank and the inner plating tank;
[0032] Figure 6 It is a schematic diagram of the conductive shaft, anode rod and sleeve structure;
[0033] In the figure: 1, plating tank, 2, outer plating tank, 3, inner plating tank, 4, second partition, 5, first partition, 6, liquid outlet bin, 7, cathode terminal, 8, cathode bin, 9, anode plate, 10, plug;
[0034] 11. first baffle, 12. conductive shaft, 13. first slot, 14. second slot, 15. first rotating mechanism, 16. gear set, 17. first motor, 18. electroplating chamber, 19. transport mechanism, 20. second motor;
[0035] 21. crank connecting rod assembly, 22. anode bin, 23. slide, 24. liquid inlet bin, 25. liquid return bin, 26. anode terminal, 27. third partition plate, 28. fourth partition plate, 29. fifth slot, 30. fourth slot;
[0036] 31. third slot, 32. outer plated tubular workpiece, 33. inner plated tubular workpiece, 34. second rotating mechanism, 35. anode rod, 36. cathode rotating seat, 37. sleeve, 38. second baffle, 39. liquid outlet pipe, 40. circulating pump;
[0037] 41. Liquid return pipe, 42. Overflow pipe. DETAILED DESCRIPTION
[0038] The utility model is further described below with reference to the accompanying drawings and embodiments. Example 1
[0039] like Figure 1 and Figure 2 A composite plating device for inner and outer surfaces of a tubular workpiece comprises a plating tank 1, above which an outer plating tank 2 and an inner plating tank 3 are arranged.
[0040] like Figure 3 and Figure 6 The two ends of the outer plating tank 2 are separated into a cathode chamber 8 and a liquid outlet chamber 6 by a first partition plate 5 and a second partition plate 4 respectively. A plating chamber 18 is formed in the middle of the outer plating tank 2, and a cathode terminal 7 is provided in the cathode chamber 8.
[0041] An anode plate 9 is arranged in the electroplating chamber 18 , and a first U-shaped slot 13 and a second U-shaped slot 14 which are coaxially arranged are arranged on the first partition plate 5 and the second partition plate 4 .
[0042] Conductive shafts 12 are symmetrically arranged on both sides of the outer plating tank 2 and are placed in the first slot 13 and the second slot 14 for fixing the two ends of the tubular workpiece. The outer diameter of the conductive shaft 12 is adapted to the second slot 14, and the outer diameter of the tubular workpiece is adapted to the first slot 13.
[0043] The tail of the conductive shaft 12 is rotatably connected to the cathode terminal 7. Specifically, the top of the cathode terminal 7 is provided with an arc-shaped groove opening upward for supporting the conductive shaft 12. The head of the conductive shaft 12 is provided with a plug 10 connected to the inner hole of the tubular workpiece. The outer plating tank 2 is provided with a first rotating mechanism 15 for driving one of the conductive shafts 12.
[0044] like Figure 4 and Figure 6 There are two symmetrically distributed inner plating tanks 3, and the inner plating tank 3 is divided into an anode tank 22, a liquid inlet tank 24 and a liquid return tank 25 by a third partition plate 27 and a fourth partition plate 28.
[0045] Among them, a slide table 23 is provided in the anode bin 22 and is connected with the slide table 23 in a transverse sliding manner. An anode terminal 26 is provided on the top of the slide table 23. A transport mechanism 19 for driving the slide table 23 to move back and forth is provided on one of the inner plating tanks 3.
[0046] A coaxially arranged U-shaped third slot 31 , a fourth slot 30 and a fifth slot 29 are respectively provided on the third partition plate 27 , the fourth partition plate 28 and the adjacent slot walls of the two inner plating tanks 3 .
[0047] A sleeve 37 for connecting the end of a tubular workpiece is rotatably connected in the fourth slot 30 and the fifth slot 29 .
[0048] An anode rod 35 is mounted in the two third slots 31 , and both ends of the anode rod 35 coaxially pass through the sleeves 37 on both sides and are rotatably connected to the anode terminals 26 on both sides. The top of the anode terminal 26 is provided with an arc-shaped groove opening upward to facilitate supporting the anode rod 35 .
[0049] A cathode rotating seat 36 for electrically connecting to the outer peripheral surface of the tubular workpiece and a second rotating mechanism 34 for driving the tubular workpiece to rotate are provided between the two inner plating tanks 3 .
[0050] like Figure 5 A circulation pump 40 is provided in the plating tank 1, and the outlet end of the circulation pump 40 is connected to the electroplating tank 18 and one of the liquid inlet tanks 24 through two liquid outlet pipes 39 respectively, and the cathode tank 8, the liquid return tank 25 and the other liquid inlet tank 24 are connected to the plating tank 1 through the liquid return pipe 41 respectively.
[0051] When working:
[0052] The outer plated tubular workpiece 32 is connected between the two conductive shafts 12 through the plug 10, and the plating solution is pumped into the electroplating chamber 18 through the circulation pump 40, and then overflows to the liquid outlet chamber 6 through the first slot 13, and then flows back to the plating solution tank 1 to form a cycle;
[0053] During the electroplating operation, the cathode terminal 7 and the cathode rotating seat 36 are connected to the cathode wire, and the anode terminal 26 and the anode plate 9 are connected to the anode wire;
[0054] The first rotating mechanism 15 drives the externally plated tubular workpiece 32 to rotate slowly, thereby forming a plating layer with uniform thickness on the outer wall of the externally plated tubular workpiece 32 .
[0055] Connect the inner plated tubular workpiece 33 to the sleeves 37 on both sides, then pass the anode rod 35 through one end of the inner plated tube and out the other end, and then rotate and connect the two ends of the anode rod 35 to the anode terminals 26 on both sides;
[0056] The plating solution is pumped into one of the liquid inlet bins 24 by a circulation pump 40, and then the plating solution flows from the annular gap between the inner plated tubular workpiece 33 and the anode rod 35 to the liquid inlet bin 24 on the other side, and then flows back to the plating solution tank 1 to form a cycle;
[0057] When the plating solution flows into the annular space between the inner plated tubular workpiece 33 and the anode rod 35 in the liquid inlet bin 24, part of the plating solution will overflow from the fourth slot 30 to the adjacent liquid return bin 25, and then be guided to the plating solution tank 1 through the liquid return pipe 41 at the bottom of the liquid return bin 25;
[0058] During the electroplating operation, the second rotating mechanism 34 is used to drive the inner-plated tubular workpiece 33 to rotate slowly, thereby forming a coating with uniform thickness on the inner wall of the inner-plated tubular workpiece 33. At the same time, the anode rod 35 is driven by the transport mechanism 19 to move back and forth along the axis in the inner-plated tubular workpiece 33, forming a shaking mixing effect, thereby avoiding the problem of additive precipitation in the plating solution flowing through the inner-plated tubular workpiece 33, which affects the quality of the coating, and further ensuring that a coating with uniform thickness is formed on the inner wall of the inner-plated tubular workpiece 33. In addition, the shaking effect of the anode rod 35 helps to quickly remove the hydrogen generated during the electroplating process of the inner-plated tubular workpiece 33, thereby avoiding gas accumulation and achieving a better electroplating effect.
[0059] In the traditional electroplating operation, due to the small inner diameter of the tubular workpiece, the anode size is small and cannot provide enough cations, resulting in uneven coating thickness and long electroplating operation hours. However, the utility model generates metal ions required for coating through the anode metal of the outer plating tank 2, and enters the circulating plating solution, which is used not only for the outer plating process but also for the inner plating process. It is suitable for the characteristics of the tubular workpiece that the inner cavity space is slender and it is not suitable to arrange large-sized anode metals. It solves the problem of inconsistent metal content and materials in the inner and outer plating layers of the workpiece, and improves the balance of the anti-corrosion performance of the inner and outer plating layers.
[0060] The utility model contacts the inner surface or outer surface of the tubular workpiece in a circulating flow manner to produce a coating. Compared with the traditional immersion electroplating method, the coating is more uniform and the structure is more stable. In addition, the utility model has the functions of switching between inner plating operation, outer plating operation and inner and outer simultaneous operation, which is more convenient to use and suitable for different process requirements. Example 2
[0061] This embodiment is further optimized on the basis of the above embodiment, specifically:
[0062] like Figure 3 and 6 A first baffle 11 that cooperates with the first slot 13 is slidably mounted on the outer side of the conductive shaft 12. The distance between the first baffle 11 and the first slot 13 is adjusted by sliding the position of the first baffle 11, thereby adjusting the flow rate of the plating solution here, and further controlling the height of the liquid level in the electroplating chamber 18.
[0063] like Figure 4 and 6 The outer sliding sleeve of the sleeve 37 is provided with a second baffle 38 that cooperates with the fourth slot 30. The distance from the fourth slot 30 is adjusted by sliding the position of the second baffle 38, thereby adjusting the flow rate of the plating solution here, and then the liquid level height in the liquid inlet tank 24 can be controlled.
[0064] In addition, an overflow pipe 42 connected to the plating solution tank 1 is connected to the bottom of the anode bin 22. The overflow pipe 42 is added to prevent the plating solution from overflowing into the anode bin 22 when the flow of the circulation pump 40 is too large or when the inner plated tubular workpiece 33 is blocked, and then discharged back to the plating solution tank 1 through the overflow pipe 42. Example 3
[0065] This embodiment is further optimized on the basis of the above embodiment, specifically:
[0066] like Figure 3 and Figure 4 The first rotating mechanism 15 and the second rotating mechanism 34 both include a first motor 17 and a gear set 16 .
[0067] The gear set 16 of the first rotating mechanism 15 is used for transmission between the first motor 17 and the conductive shaft 12 , and the gear set of the second rotating mechanism 34 is used for transmission between the first motor and the sleeve 37 or the tubular workpiece.
[0068] In addition, the gear set 16 may be replaced by a friction wheel, which is mounted on the output shaft of the first motor 17 to drive the tubular workpiece or the drive sleeve to rotate by friction transmission.
[0069] like Figure 4The transport mechanism 19 includes a second motor 20 and a crank-connecting rod assembly 21 , and the second motor 20 drives the slide 23 to move through the crank-connecting rod assembly 21 . Example 4
[0070] This embodiment is further optimized on the basis of the above embodiment, specifically:
[0071] In this embodiment, a temperature detector, a pH detector and a liquid level detector are also provided for detecting the plating liquid contained in the plating tank 1. The temperature, pH value and liquid level in the plating tank 1 can be monitored in real time through the above detectors. The detection signals of each detector can be collected in conjunction with the currently used liquid detection system, and the alarm values of temperature, pH value and liquid level can be preset by the liquid detection system to issue an early warning.
[0072] A constant temperature heater is also provided to control the temperature of the plating solution contained in the plating solution tank 1 so as to keep the plating solution at a constant temperature.
[0073] In addition, the plating tank 1 is provided with a rotating stirrer for stirring the plating solution contained therein, and the electroplating chamber 18 is provided with a pneumatic stirrer to avoid the deposition of additives in the plating solution and improve the electroplating effect.
[0074] The present invention is not limited to the above-mentioned embodiments. Within the knowledge scope of those skilled in the art, various changes can be made without departing from the purpose of the present invention. The changed contents still belong to the protection scope of the utility model.
Claims
1. A composite plating device for inner and outer surfaces of a tubular workpiece, comprising a plating bath, characterized in that: An outer plating tank and an inner plating tank are provided above the plating tank; The two ends of the outer plating tank are separated into a cathode chamber and a liquid outlet chamber by a first partition and a second partition respectively, and a plating chamber is formed in the middle, a cathode terminal is provided in the cathode chamber, an anode plate is provided in the plating chamber, and a coaxially arranged U-shaped first slot and a second slot are provided on the first partition and the second partition; Conductive shafts placed in the first slot and the second slot for fixing the two ends of the tubular workpiece are symmetrically arranged on both sides of the outer plating tank, the outer diameter of the conductive shaft is adapted to the second slot, the outer diameter of the tubular workpiece is adapted to the first slot, the tail of the conductive shaft is rotatably connected to the cathode terminal, the head of the conductive shaft is provided with a plug connected to the inner hole of the tubular workpiece, and the outer plating tank is provided with a first rotating mechanism for driving one of the conductive shafts; There are two symmetrically distributed inner plating tanks, which are divided into an anode bin, a liquid inlet bin and a liquid return bin by a third partition plate and a fourth partition plate. A slide table is provided in the anode bin for transverse sliding connection, and an anode terminal is provided on the top of the slide table. A transport mechanism for driving the slide table to move back and forth is provided on one of the inner plating tanks; The third partition plate, the fourth partition plate and the adjacent slot walls of the two inner plating slots are respectively provided with a coaxially arranged U-shaped third slot, a fourth slot and a fifth slot, the fourth slot and the fifth slot are rotatably connected with sleeves for connecting the ends of the tubular workpiece, and an anode rod is mounted in the two third slots, and the two ends of the anode rod are respectively coaxially passed through the sleeves on both sides and rotatably connected with the anode terminals on both sides; A cathode rotating seat for electrically connecting to the outer peripheral surface of the tubular workpiece and a second rotating mechanism for driving the tubular workpiece to rotate are provided between the two inner plating tanks; A circulation pump is provided in the plating liquid tank, and the outlet end of the circulation pump is connected to the electroplating tank and one of the liquid inlet tanks through two liquid outlet pipes respectively. The cathode tank, the liquid return tank and the other liquid inlet tank are connected to the plating liquid tank through the liquid return pipes respectively.
2. The device for composite plating the inner and outer surfaces of a tubular workpiece according to claim 1, characterized in that: The outer sliding sleeve of the conductive shaft is provided with a first blocking piece matched with the first slot, and the outer sliding sleeve of the sleeve is provided with a second blocking piece matched with the fourth slot.
3. The composite plating device for inner and outer surfaces of a tubular workpiece according to claim 1, characterized in that: The bottom of the anode bin is connected with an overflow pipe which is in communication with the plating liquid tank.
4. The device for composite plating the inner and outer surfaces of a tubular workpiece according to claim 1, characterized in that: The first rotating mechanism and the second rotating mechanism both include a first motor and a gear set. The gear set of the first rotating mechanism is used for transmission between the first motor and the conductive shaft, and the gear set of the second rotating mechanism is used for transmission between the first motor and the sleeve or the tubular workpiece.
5. The device for composite plating inner and outer surfaces of a tubular workpiece according to claim 1, characterized in that: The first rotating mechanism and the second rotating mechanism both include a first motor and a friction wheel mounted on the output shaft of the first motor. The first rotating mechanism drives the conductive shaft through the friction wheel, and the second rotating mechanism drives the sleeve or tubular workpiece through the friction wheel.
6. The device for composite plating inner and outer surfaces of a tubular workpiece according to claim 1, characterized in that: The transport mechanism comprises a second motor and a crank-connecting rod assembly, and the second motor drives the slide to move via the crank-connecting rod assembly.
7. The device for composite plating inner and outer surfaces of a tubular workpiece according to claim 1, characterized in that: A temperature detector, a pH detector and a liquid level detector are also provided for detecting the plating liquid contained in the plating liquid tank.
8. The device for composite plating inner and outer surfaces of a tubular workpiece according to claim 1, characterized in that: A constant temperature heater is also provided for controlling the temperature of the plating solution contained in the plating solution tank.
9. The device for composite plating inner and outer surfaces of a tubular workpiece according to claim 1, characterized in that: The plating liquid tank is also provided with a rotating stirrer for stirring the plating liquid contained therein, and the electroplating warehouse is provided with a pneumatic stirrer.