An electrochemical polishing equipment for BPE pipeline fittings

Abstract

The present invention discloses an electrochemical polishing device for BPE pipeline fittings, belonging to the field of electrochemical polishing. An electrochemical polishing device for BPE pipeline fittings includes a bottom plate, on which an electrolytic cell is fixedly installed. It further includes: a top plate, fixedly installed at the upper end of the bottom plate through a pillar. A loading and unloading station is arranged at the left end of the bottom plate. A plurality of linearly distributed sprockets are rotatably installed at the bottom of the top plate, and the plurality of sprockets are connected by a chain. A driving source for intermittently rotating the sprockets is arranged at the upper end of the top plate; a plurality of fixing rings are all installed at the lower end of the chain through an automatic telescopic mechanism. A sleeve is rotatably installed in each of the plurality of fixing rings, and an electromagnet is fixedly installed in the inner wall of each of the plurality of sleeves. In the present invention, the chain will move the pipe fittings horizontally in the electrolyte, so that the electrolyte can contact the inner wall of the pipe fittings more fully, ensuring the polishing effect of the pipe fittings, and also enabling the efficient discharge of the electrolyte in the pipe fittings.

Description

Technical Field

[0001] The present invention relates to the technical field of electrochemical polishing, and particularly to an electrochemical polishing device for BPE pipeline fittings. Background Art

[0002] Electropolishing, also known as electrochemical polishing, is a method that mainly anodizes metal workpieces through electrolysis to improve the surface finish of metal workpieces. During electropolishing, the workpiece is used as the anode and a lead plate is used as the cathode. They are placed in the electrolyte together, and direct current is passed through. Under specific process conditions, the current density of the burrs and protrusions on the surface of the workpiece is relatively large, and the corresponding dissolution rate is also large. This non-uniform dissolution makes the protrusions dissolve quickly, thus playing a role in leveling and polishing.

[0003] When electrochemically polishing pipelines, it is difficult for the inner walls of thinner pipelines to come into full contact with the electrolyte in the electrolytic cell. Especially when processing BPE pipeline fittings, that is, sanitary fittings, the processing requirements are higher. If the surface smoothness of the pipeline is insufficient, pollutants are likely to remain in the pipeline for a long time during the use of BPE pipeline fittings. Therefore, it is necessary to design an electrochemical polishing device for BPE pipeline fittings that can achieve better polishing effect on the inner wall of the pipeline. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that it is difficult for the inner walls of thinner pipelines to come into full contact with the electrolyte in the electrolytic cell in the prior art, and to propose an electrochemical polishing device for BPE pipeline fittings.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An electrochemical polishing device for BPE pipeline fittings includes a bottom plate, on which an electrolytic cell is fixedly installed. It further includes: a top plate, which is fixedly installed at the upper end of the bottom plate through columns. Among them, a loading and unloading station is provided at the left end of the bottom plate. A plurality of linearly distributed sprockets are rotatably installed at the bottom of the top plate, and the plurality of sprockets are connected by a chain. A driving source for intermittently rotating the sprockets is provided at the upper end of the top plate; a plurality of fixing rings, all of which are installed at the lower end of the chain through an automatic telescoping mechanism. Among them, sleeves are rotatably installed in the plurality of fixing rings, and electromagnets are fixedly installed inside the inner walls of the plurality of sleeves.

[0007] Preferably, to drive the sleeves to move intermittently, the driving source includes a driving motor fixedly installed at the top of the top plate. Among them, an incomplete gear is fixedly installed on the output shaft of the driving motor, and a driven gear that cooperates with the incomplete gear is fixedly installed at the shaft end of one of the sprockets.

[0008] In order to drive the sleeve to be automatically immersed in the electrolyte, further, the automatic telescopic mechanism includes a sliding tube fixedly connected to the lower end of the chain through a bracket. A threaded rod rotatably connected to the chain is provided inside the sliding tube. Wherein, an internally threaded tube is threadedly connected to the outer wall of the threaded rod. The internally threaded tube is slidably connected inside the sliding tube, and the fixed ring is installed at the lower end of the internally threaded tube.

[0009] In order to automatically drive the threaded rod to rotate, furthermore, a lifting gear is fixedly installed at the upper end of the threaded rod. Wherein, a first rack and a second rack that cooperate with the lifting gear are fixedly installed at the lower end of the top plate. The first rack and the second rack are respectively located at both ends of the chain, and the first rack corresponds to the loading and unloading station.

[0010] In order to drive the sleeve to rotate in the electrolyte, furthermore, a fan blade is fixedly installed on the outer wall of the sleeve. The fan blade is composed of a plurality of blades distributed circumferentially.

[0011] In order to drive the sleeve to be perpendicular to the bottom plate, furthermore, the lower end of the internally threaded tube is rotatably connected to a right flat plate through a rotating shaft. Wherein, a left flat plate is connected to the side of the right flat plate through an elastic telescopic mechanism. The elastic telescopic mechanism is used to drive the right flat plate and the left flat plate to move away from and close to each other, and the fixed ring is fixedly connected to the left flat plate.

[0012] In order to automatically drive the sleeve to be perpendicular to the bottom plate, furthermore, a first driven gear is fixedly installed at the shaft end of the rotating shaft. A longitudinal rack that cooperates with the first driven gear is fixedly connected to the outer wall of the sliding tube.

[0013] In order to drive the sleeve to vibrate up and down, furthermore, the elastic telescopic mechanism includes a sliding rod fixedly connected to the side wall of the right flat plate. A sliding hole for the sliding rod to cooperate with is provided on the left flat plate. Wherein, the right flat plate and the left flat plate are elastically connected through a return spring. An L-shaped rod is fixedly connected to the side wall of the right flat plate, and the L-shaped rod corresponds to the blade on the fan blade.

[0014] In order to automatically drive the sleeve to rotate, furthermore, a second driven gear is fixedly installed on the outer wall of the sleeve. A third rack that cooperates with the second driven gear is fixedly installed at the lower end of the top plate. The third rack is close to the rear wall of the top plate.

[0015] In order to ensure perfect meshing between the second rack and the lifting gear, furthermore, the first rack is in the shape of a long strip, and the second rack is in the shape of an arc.

[0016] Compared with the prior art, the present invention provides an electrochemical polishing device for BPE pipeline fittings, which has the following beneficial effects:

[0017] 1. When the lifting gear meshes with the first rack internally in this electrochemical polishing equipment for BPE pipeline fittings, the pipe fittings and the sleeve will be automatically immersed in the electrolyte of the electrolytic cell, thus realizing the automatic feeding of the pipe fittings, greatly improving the degree of automation. On the other hand, the chain will make the pipe fittings move horizontally in the electrolyte, so that the electrolyte can contact the inner wall of the pipe fittings more fully, ensuring the polishing effect of the pipe fittings.

[0018] 2. In this electrochemical polishing equipment for BPE pipeline fittings, the upward-sliding internal thread pipe will drive the first driven gear on the rotating shaft to mesh with the longitudinal rack. The first driven gear will then drive the rotating shaft and the right flat plate to rotate. The right flat plate will drive the sleeve and the pipe fittings to be perpendicular to the bottom plate, so that the residual electrolyte in the pipe fittings can be efficiently poured into the electrolytic cell, reducing the waste of the electrolyte.

[0019] 3. When the sleeve moves horizontally in the electrolyte in this electrochemical polishing equipment for BPE pipeline fittings, the fan blades will drive the pipe fittings to rotate synchronously in the electrolyte under the action of the electrolyte, thus further improving the polishing efficiency of the pipe fittings. On the other hand, the third rack will drive the sleeve and the internal pipe fittings to rotate through the second driven gear, so that the pipe fittings can discharge the residual electrolyte inside more efficiently, further reducing the waste of the electrolyte.

[0020] 4. In this electrochemical polishing equipment for BPE pipeline fittings, the rotating fan blades will indirectly press against the L-shaped rod through the blades. Then the rotating fan blades will drive the sleeve to reciprocate up and down, so that the pipe fittings can shake off the electrolyte on the inner wall more efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Isometric structural schematic diagram of an electrochemical polishing equipment for BPE pipeline fittings proposed by the present invention;

[0022] Figure 2 Front view sectional structural schematic diagram of an electrochemical polishing equipment for BPE pipeline fittings proposed by the present invention;

[0023] Figure 3 Partial isometric structural schematic diagram of an electrochemical polishing equipment for BPE pipeline fittings proposed by the present invention;

[0024] Figure 4 Top plate isometric structural schematic diagram of an electrochemical polishing equipment for BPE pipeline fittings proposed by the present invention;

[0025] Figure 5 Of an electrochemical polishing equipment for BPE pipeline fittings proposed by the present invention Figure 2 Partial structural schematic diagram;

[0026] Figure 6For an electro - chemical polishing device of BPE pipeline fittings proposed by the present invention Figure 5 Enlarged view of part A in

[0027] Figure 7 Schematic axonometric view of the sleeve of an electro - chemical polishing device of BPE pipeline fittings proposed by the present invention.

[0028] In the figure: 1, bottom plate; 2, electrolytic cell; 3, support pillar; 4, top plate; 5, sprocket; 6, chain; 7, driving motor; 8, incomplete gear; 9, driven gear; 10, sliding tube; 11, bracket; 12, internally - threaded tube; 13, threaded rod; 14, fixing ring; 15, sleeve; 16, fan blade; 17, left flat plate; 18, right flat plate; 19, rotating shaft; 20, first driven gear; 21, first rack; 22, second rack; 23, second driven gear; 24, third rack; 25, loading and unloading station; 26, sliding rod; 27, sliding hole; 28, return spring; 29, L - shaped rod; 30, longitudinal rack; 31, lifting gear. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0031] Embodiment 1:

[0032] Refer to Figures 1 - 7, an electro-chemical polishing device for BPE pipeline fittings, comprising a bottom plate 1, on which an electrolytic cell 2 is fixedly installed. An electrolytic solution for polishing is provided in the electrolytic cell 2. The device further includes: a top plate 4, fixedly installed at the upper end of the bottom plate 1 through a support column 3. Among them, a loading and unloading station 25 is provided at the left end of the bottom plate 1, which is a station for loading and unloading. A plurality of linearly distributed sprockets 5 are rotatably installed at the bottom of the top plate 4. The plurality of sprockets 5 are connected by a chain 6. A driving source for intermittently rotating the sprockets 5 is provided at the upper end of the top plate 4; a plurality of fixing rings 14 are all installed at the lower end of the chain 6 through an automatic telescopic mechanism. Among them, a sleeve 15 is rotatably installed in each of the plurality of fixing rings 14, and an electromagnet is fixedly installed in the inner wall of each of the plurality of sleeves 15, which mainly clamps or adsorbs the pipe fittings in the sleeve 15. Other fixtures that can clamp the pipe fittings in the sleeve 15 can also be used.

[0033] During use, the driving source will intermittently drive the sprockets 5 to rotate, and the sprockets 5 will drive the chain 6 to intermittently convey and stop, thereby driving the plurality of sleeves 15 and the sliding pipes 10 at the lower end of the chain 6 to intermittently convey and stop. When the sliding pipe 10 is located at the loading and unloading station 25, the pipe fittings to be polished are placed into the sleeve 15, and the sleeve 15 adsorbs the pipe fittings through the internal electromagnet. At this time, the intermittently moving sleeve 15 will drive the internal pipe fittings to intermittently convey towards the electrolytic cell 2. When the pipe fittings and the sleeve 15 move above the electrolytic cell 2, the automatic telescopic mechanism will drive the sleeve 15 and the pipe fittings to be immersed in the electrolytic solution of the electrolytic cell 2, thereby realizing the automatic unloading work of the pipe fittings, greatly improving the degree of automation. When the sleeve 15 enters the electrolytic cell 2, the axis of the sleeve 15 will be the same as the moving direction of the chain 6. Then the chain 6 will make the pipe fittings move horizontally in the electrolytic solution, so that the electrolytic solution can more fully contact the inner wall of the pipe fittings, ensuring the polishing effect of the pipe fittings.

[0034] Furthermore, a fan blade 16 is fixedly installed on the outer wall of the sleeve 15. The fan blade 16 is mainly composed of a plurality of circumferentially distributed blades, similar to the rotating blades in an electric fan. When the sleeve 15 moves horizontally in the electrolytic solution, the fan blade 16 will drive the sleeve 15 to rotate in the fixing ring 14 under the action of the electrolytic solution, thereby driving the pipe fittings to rotate synchronously in the electrolytic solution, which can further improve the polishing efficiency of the pipe fittings.

[0035] Embodiment 2:

[0036] Refer to Figures 1 - 4 , which is basically the same as Embodiment 1. Furthermore, the specific implementation scheme of the driving source is specifically disclosed.

[0037] The drive source includes a drive motor 7 fixedly installed on the top of the top plate 4. Among them, an incomplete gear 8 is fixedly installed on the output shaft of the drive motor 7. The teeth on the incomplete gear 8 are incomplete, and there is a part where the teeth are missing. A driven gear 9 that cooperates with the incomplete gear 8 is fixedly installed at the shaft end of one of the sprockets 5.

[0038] During use, the drive motor 7 will intermittently drive the driven gear 9 and the sprocket 5 to rotate through the incomplete gear 8. The sprocket 5 will then drive the chain 6 to intermittently convey and stop, thereby driving the multiple sleeves 15 and the sliding pipe 10 at the lower end of the chain 6 to intermittently convey and stop.

[0039] Embodiment 3:

[0040] Refer to Figures 1 - 5 , which is basically the same as Embodiment 2. Further, a specific implementation scheme of the automatic telescopic mechanism is specifically disclosed.

[0041] The automatic telescopic mechanism includes a sliding pipe 10 fixedly connected to the lower end of the chain 6 through a bracket 11. A threaded rod 13 rotatably connected to the chain 6 is provided inside the sliding pipe 10. Among them, an internally threaded pipe 12 is threadedly connected to the outer wall of the threaded rod 13. The internally threaded pipe 12 is slidably connected inside the sliding pipe 10. A fixing ring 14 is installed at the lower end of the internally threaded pipe 12; a lifting gear 31 is fixedly installed at the upper end of the threaded rod 13. Among them, a first rack 21 and a second rack 22 that cooperate with the lifting gear 31 are fixedly installed at the lower end of the top plate 4. The first rack 21 and the second rack 22 are respectively located at both ends of the chain 6. The first rack 21 corresponds to the loading and unloading station 25, and the shape of the first rack 21 is strip-shaped, and the shape of the second rack 22 is arc-shaped.

[0042] During the process of the chain 6 conveying the pipe fittings, when the lifting gear 31 is internally meshed with the first rack 21, the lifting gear 31 will drive the threaded rod 13 to rotate. The threaded rod 13 will then drive the internally threaded pipe 12 to slide downward. The internally threaded pipe 12 will drive the lower-end sleeve 15 and the pipe fitting to move downward. When the pipe fitting and the sleeve 15 move above the electrolytic cell 2, the pipe fitting and the sleeve 15 will just be immersed in the electrolyte of the electrolytic cell 2, thereby realizing the automatic blanking work of the pipe fitting, greatly improving the degree of automation. When the sliding pipe 10 moves to the other end of the chain 6, the second rack 22 will be externally meshed with the lifting gear 31. The lifting gear 31 will drive the threaded rod 13 to rotate in the reverse direction. The internally threaded pipe 12 will drive the sleeve 15 and the pipe fitting to slide upward and leave the electrolyte, thereby automatically taking out the polished pipe fitting from the electrolyte.

[0043] Embodiment 4:

[0044] Refer to Figures 2 - 5 , which is basically the same as Embodiment 3. Further, a specific implementation scheme for making the sleeve 15 perpendicular to the bottom plate 1 is specifically added.

[0045] The lower end of the internally threaded tube 12 is rotatably connected to a right flat plate 18 through a rotating shaft 19. Among them, a left flat plate 17 is connected to the side of the right flat plate 18 through an elastic telescopic mechanism. The elastic telescopic mechanism is used to drive the right flat plate 18 and the left flat plate 17 to move away from and close to each other. The fixing ring 14 is fixedly connected to the left flat plate 17; a first driven gear 20 is fixedly installed at the shaft end of the rotating shaft 19, and a longitudinal rack 30 that cooperates with the first driven gear 20 is fixedly connected to the outer wall of the sliding tube 10.

[0046] When the internally threaded tube 12 slides upward and resets, the internally threaded tube 12 will drive the first driven gear 20 on the rotating shaft 19 to engage with the longitudinal rack 30. The first driven gear 20 will drive the rotating shaft 19 and the right flat plate 18 to rotate. The right flat plate 18 will drive the sleeve 15 and the pipe fitting to be perpendicular to the bottom plate 1, so that the residual electrolyte in the pipe fitting can be efficiently poured into the electrolytic cell 2, reducing the waste of the electrolyte. When the sleeve 15 slides downward again, the longitudinal rack 30 will drive the first driven gear 20 to reverse, so that the sleeve 15 and the pipe fitting are in a horizontal state again, ensuring the polishing efficiency of the pipe fitting. The elastic telescopic mechanism can drive the left flat plate 17 and the sleeve 15 to vibrate up and down, further improving the effect of shaking the electrolyte from the pipe fitting.

[0047] Example 5:

[0048] Refer to Figures 5 - 7 , which is basically the same as Example 4. Furthermore, the specific implementation scheme of the elastic telescopic mechanism is specifically disclosed.

[0049] The elastic telescopic mechanism includes a sliding rod 26 fixedly connected to the side wall of the right flat plate 18. A sliding hole 27 that cooperates with the sliding rod 26 is provided on the left flat plate 17. The sliding rod 26 can slide up and down in the sliding hole 27. Among them, the right flat plate 18 and the left flat plate 17 are elastically connected through a return spring 28. An L-shaped rod 29 is fixedly connected to the side wall of the right flat plate 18, and the L-shaped rod 29 corresponds to the blades on the fan blade 16; a second driven gear 23 is fixedly installed on the outer wall of the sleeve 15, and a third rack 24 that cooperates with the second driven gear 23 is fixedly installed at the lower end of the top plate 4. The third rack 24 is close to the rear wall of the top plate 4.

[0050] When the second driven gear 23 passes through the third rack 24, that is, during the rotation of the sleeve 15 to a position perpendicular to the bottom plate 1, the third rack 24 will rotate through the second driven gear 23, and the second driven gear 23 will drive the sleeve 15 and the internal pipe fittings to rotate, so that the pipe fittings can more efficiently discharge the residual electrolyte inside, further reducing the waste of electrolyte. When the sleeve 15 is in the longitudinal state and rotates, the sleeve will drive the fan blade 16 to rotate synchronously. The fan blade 16 can blow a small amount of electrolyte on the outer wall of the pipe fitting back into the electrolytic cell 2, reducing the waste of electrolyte. And the rotating fan blade 16 will indirectly press against the L-shaped rod 29 through the blade. Each time the blade of the fan blade 16 presses against the L-shaped rod 29, the fan blade 16 will drive the pipe fitting 15 and the left flat plate 17 to slide upward. When the blade of the fan blade 16 does not press, the left flat plate 17 will drive the sleeve 15 to slide downward and reset under the action of the return spring 28. Repeating this process, the rotating fan blade 16 will drive the sleeve 15 to reciprocate up and down, so that the pipe fitting can more efficiently shake off the electrolyte on the inner wall. When the fan blade 16 is in the electrolyte, the return spring 28 between the left flat plate 17 and the right flat plate 18 will keep the fan blade 16 away from the L-shaped rod 29. Therefore, when the fan blade 16 rotates, it will not touch the L-shaped rod 29, preventing the L-shaped rod 29 from affecting the rotation of the fan blade 16. When the sleeve 15 is perpendicular to the bottom plate 1, the weight of the sleeve 15 and the pipe fitting will drive the left flat plate 17 to press downward, so that the fan blade 16 will touch the L-shaped rod 29.

[0051] In the electrochemical polishing equipment for BPE pipeline pipe fittings, during use, the drive motor 7 will intermittently drive the driven gear 9 and the sprocket 5 to rotate through the incomplete gear 8. The sprocket 5 will intermittently convey and stop the chain 6, thereby driving the intermittent conveyance and stop of multiple sleeves 15 and sliding pipes 10 at the lower end of the chain 6. When the sliding pipe 10 is at the loading and unloading station 25, the pipe fitting to be polished is placed into the sleeve 15. The sleeve 15 adsorbs the pipe fitting through the internal electromagnet. At this time, the intermittently moving sleeve 15 will drive the internal pipe fitting to be intermittently conveyed towards the electrolytic cell 2. When the lifting gear 31 is in internal engagement with the first rack 21, the lifting gear 31 will drive the threaded rod 13 to rotate, and the threaded rod 13 will drive the internally threaded pipe 12 to slide downward. The internally threaded pipe 12 will drive the sleeve 15 and the pipe fitting at the lower end to move downward. When the pipe fitting and the sleeve 15 move above the electrolytic cell 2, the pipe fitting and the sleeve 15 will just be immersed in the electrolyte of the electrolytic cell 2, thus realizing the automatic feeding operation of the pipe fitting, greatly improving the degree of automation. When the sleeve 15 enters the electrolytic cell 2, the axis of the sleeve 15 will be in the same direction as the moving direction of the chain 6. Then the chain 6 will make the pipe fitting move horizontally in the electrolyte, so that the electrolyte can more fully contact the inner wall of the pipe fitting, ensuring the polishing effect of the pipe fitting.

[0052] When the sliding tube 10 moves to the other end of the chain 6, the second rack 22 will be in external meshing with the lifting gear 31. The lifting gear 31 will drive the threaded rod 13 to rotate in the reverse direction, and the internally threaded tube 12 will drive the sleeve 15 and the pipe fitting to slide upward and leave the electrolyte, so as to automatically take out the polished pipe fitting from the electrolyte. When the internally threaded tube 12 slides upward and resets, the internally threaded tube 12 will drive the first driven gear 20 on the rotating shaft 19 to mesh with the longitudinal rack 30. The first driven gear 20 will drive the rotating shaft 19 and the right flat plate 18 to rotate. The right flat plate 18 will drive the sleeve 15 and the pipe fitting to be perpendicular to the bottom plate 1, so as to efficiently pour the residual electrolyte in the pipe fitting into the electrolytic cell 2, reducing the waste of the electrolyte. When the sleeve 15 returns to the loading and unloading station 25 again, the electromagnet in the sleeve 15 loses power, and the pipe fitting will automatically slide downward from the sleeve 15. Then, the pipe fitting to be polished is placed into the sleeve 15 and can be attracted by the electromagnet. When the sleeve 15 slides downward again, the longitudinal rack 30 will drive the first driven gear 20 to reverse, so that the sleeve 15 and the pipe fitting are in a horizontal state again, ensuring the polishing efficiency of the pipe fitting.

[0053] The above is only the preferred specific implementation mode 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, according to the technical solution of the present invention and its inventive concept, makes equivalent substitution or change, and should be covered within the protection scope of the present invention.

Claims

1. An electrochemical polishing device for BPE pipeline fittings, comprising a bottom plate (1), and an electrolytic cell (2) is fixedly installed on the bottom plate (1), characterized in that, It further includes: A top plate (4), fixedly installed at the upper end of the bottom plate (1) through a support column (3). Among them, a loading and unloading station (25) is provided at the left end of the bottom plate (1), and a plurality of linearly distributed sprockets (5) are rotatably installed at the bottom of the top plate (4). A chain (6) is connected between the plurality of sprockets (5), and a driving source for intermittently rotating the sprockets (5) is provided at the upper end of the top plate (4). A plurality of fixing rings (14), all installed at the lower end of the chain (6) through an automatic telescopic mechanism. Among them, a sleeve (15) is rotatably installed inside each of the plurality of fixing rings (14), and an electromagnet is fixedly installed inside the inner wall of each of the plurality of sleeves (15). The automatic telescopic mechanism includes: A sliding tube (10) fixedly connected to the lower end of the chain (6) through a bracket (11). A threaded rod (13) rotatably connected to the chain (6) is provided inside the sliding tube (10). Among them, an internally threaded tube (12) is threadedly connected to the outer wall of the threaded rod (13). The internally threaded tube (12) is slidably connected inside the sliding tube (10), and the fixing ring (14) is installed at the lower end of the internally threaded tube (12). A lifting gear (31) is fixedly installed at the upper end of the threaded rod (13). Among them, a first rack (21) and a second rack (22) cooperating with the lifting gear (31) are fixedly installed at the lower end of the top plate (4). The first rack (21) and the second rack (22) are respectively located at both ends of the chain (6), and the first rack (21) corresponds to the loading and unloading station (25). A fan blade (16) is fixedly installed on the outer wall of the sleeve (15). The fan blade (16) is mainly composed of a plurality of circumferentially distributed blades. The lower end of the internally threaded tube (12) is rotatably connected to a right flat plate (18) through a rotating shaft (19). Among them, a left flat plate (17) is connected to the side of the right flat plate (18) through an elastic telescopic mechanism. The elastic telescopic mechanism is used to drive the right flat plate (18) and the left flat plate (17) to move away from and close to each other, and the fixing ring (14) is fixedly connected to the left flat plate (17). A first driven gear (20) is fixedly installed at the shaft end of the rotating shaft (19), and a longitudinal rack (30) cooperating with the first driven gear (20) is fixedly connected to the outer wall of the sliding tube (10). The elastic telescopic mechanism includes: A sliding rod (26) fixedly connected to the side wall of the right flat plate (18). A sliding hole (27) cooperating with the sliding rod (26) is provided on the left flat plate (17). Among them, the right flat plate (18) and the left flat plate (17) are elastically connected through a return spring (28). An L-shaped rod (29) is fixedly connected to the side wall of the right flat plate (18), and the L-shaped rod (29) corresponds to the blades on the fan blade (16). A second driven gear (23) is fixedly installed on the outer wall of the sleeve (15), and a third rack (24) cooperating with the second driven gear (23) is fixedly installed at the lower end of the top plate (4). The third rack (24) is close to the rear wall of the top plate (4).

2. The electro-chemical polishing equipment for BPE pipeline fittings according to claim 1, characterized in that, The driving source includes: A driving motor (7) fixedly installed on the top of the top plate (4); Wherein, an incomplete gear (8) is fixedly installed on the output shaft of the driving motor (7), and a driven gear (9) matched with the incomplete gear (8) is fixedly installed at the shaft end of one of the sprockets (5).

3. An electrochemical polishing device for BPE pipeline fittings according to claim 1, characterized in that, The first rack (21) is in a long strip shape, and the second rack (22) is in an arc shape.

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