Corrosion resistance testing device for low-voltage anode foil for lead-free electrolytic capacitor

Abstract

The utility model belongs to the technical field of corrosion resistance testing of low-voltage anode foils, and particularly relates to a corrosion resistance testing device of a low-voltage anode foil for a lead-free electrolytic capacitor, which comprises a reaction container, a discharge valve is mounted at the bottom of the reaction container, and a motor, a clamping frame, a copper rod and an exhaust valve are mounted at the top of the reaction container. The motor is in transmission connection with an outer sleeve through a belt transmission assembly, the outer sleeve is rotationally clamped on the reaction container, a foil rod is inserted in the inner side of the outer sleeve and is clamped on a clamping frame in a matched mode, the outer sleeve comprises a connecting pipe, the bottom end of the connecting pipe is connected with a lower pipe body, an overflow groove is formed in the top side of the lower pipe body, and the foil rod is clamped on the clamping frame in a matched mode. The lower side of the inner wall of the lower pipe body is connected with a connecting frame, and the connecting frame is connected with paddles through connecting rods. When the paddle in the outer sleeve rotates, the reaction liquid can flow from bottom to top to wash and remove an air pocket attached to the surface of the foil rod, so that the foil rod is in full and uniform contact with the reaction liquid, and the test accuracy is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage anode foil corrosion resistance testing, in particular to a low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors. Background Art

[0002] In the existing technology, during the production process of low-voltage anode foil, due to process deviations, the corrosion resistance of the low-voltage anode foil will be different. Before the low-voltage anode foil leaves the factory, the corrosion resistance of the low-voltage anode foil needs to be tested to prevent defective products from flowing into the market and damaging the reputation of the merchants. Therefore, a low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors is needed.

[0003] When testing the corrosion resistance of low-voltage anode foil, the foil rod must be partially immersed in the reaction solution. The weight change before and after the reaction is measured to determine the corrosion resistance. Some technologies use a stirring mechanism to improve the uniformity of contact between the foil rod and the reaction solution. However, in actual testing, there is a problem: during the reaction, hydrogen is generated on the surface of the foil rod. This gas pocket adheres to the surface of the foil rod, preventing sufficient contact between the foil rod and the reaction solution, thereby negatively affecting the accuracy of the test. Utility Model Content

[0004] In response to the above problems, the purpose of the present utility model is to provide a low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors, which solves the problem that when the existing low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors is used, hydrogen is generated by the reaction on the surface of the foil rod, and the gas bag adheres to the surface of the foil rod, which affects the sufficient contact between the foil rod and the reaction liquid, thereby adversely affecting the accuracy of the test.

[0005] To achieve the above objectives, the utility model adopts the following technical solution: a low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors, comprising a reaction vessel, a discharge valve being installed at the bottom of the reaction vessel, a motor, a clamping frame, a copper rod and an exhaust valve being installed at the top of the reaction vessel, the motor being connected to an outer sleeve through a belt drive assembly, the outer sleeve being rotatably clamped on the reaction vessel, a foil rod being inserted into the inner side of the outer sleeve, the foil rod being adapted to be clamped on the clamping frame, the outer sleeve comprising a connecting pipe, the bottom end of the connecting pipe being connected to a lower tube body, an overflow groove being provided on the top side of the lower tube body, a connecting frame being connected to the lower side of the inner wall of the lower tube body, and the connecting frame being connected to a paddle through a connecting rod.

[0006] The beneficial effect of the utility model is that when the blades in the outer sleeve rotate, the reaction liquid can flow from bottom to top to flush away the air pockets attached to the surface of the foil rod, so that the foil rod and the reaction liquid are fully and evenly contacted, thereby ensuring the accuracy of the test.

[0007] In order to firmly hold the foil stick;

[0008] As a further improvement of the above technical solution: the clamping frame includes an L-shaped rod, which is installed on the top of the reaction vessel. One end of the L-shaped rod is connected to a sleeve, and the foil rod is slidably inserted in the sleeve. The side of the sleeve is provided with an internal threaded through hole structure for threaded connection with a tightening bolt along the radial direction of the sleeve.

[0009] The beneficial effect of this improvement is that the operator can screw the tightening bolt so that the end of the tightening bolt presses against the side of the foil rod, thereby firmly fixing the foil rod in the sleeve.

[0010] In order to make the reaction liquid flowing from bottom to top flow evenly along the surface of the foil rod;

[0011] As a further improvement of the above technical solution: the axis of the sleeve is collinear with the axes of the blade and the lower tube.

[0012] The beneficial effect of this improvement is that the reaction liquid transported by the blades can flow upward evenly along the curved side of the foil rod, while flushing away the air pockets attached to the surface of the foil rod and making the surface of the foil rod evenly contact with the reaction liquid.

[0013] In order to ensure the stability of the blade installation and enable the reaction liquid to flow smoothly upward;

[0014] As a further improvement of the above technical solution: the connecting frame is a cross-shaped plate structure.

[0015] The beneficial effect of this improvement is that the four ends of the connecting frame can be firmly connected to the inner wall of the lower tube body, thereby providing stable support for the connecting rod and the blades installed on the connecting rod, and allowing the reaction liquid to flow smoothly upward.

[0016] In order to effectively prevent the foil rod from falling into the outer sleeve;

[0017] As a further improvement of the above technical solution: when the bottom end of the foil rod contacts the top surface of the connecting frame, the top end of the foil rod is not lower than the top end of the sleeve.

[0018] The beneficial effect of this improvement is that, under the support of the connecting frame, the top end of the foil rod is always not lower than the sleeve, thereby preventing the foil rod from falling into the inner part of the outer sleeve and being inconvenient to remove.

[0019] In order to allow the reaction liquid to smoothly overflow from the lower tube body and realize circulation;

[0020] As a further improvement of the above technical solution: there are multiple overflow grooves, which are equidistantly spaced around the axis of the lower tube body.

[0021] The beneficial effect of this improvement is that the reaction liquid can be discharged smoothly through multiple overflow grooves when it flows upward under the push of the blades.

[0022] In order to prevent the reaction liquid on the foil rod surface from dripping onto the belt drive assembly during the process of extracting the foil rod after the reaction technology;

[0023] As a further improvement of the above technical solution: a collecting groove is provided at the top of the connecting pipe, and the collecting groove is a tapered groove structure that is wide at the top and narrow at the bottom.

[0024] The beneficial effect of this improvement is that the collection tank can effectively collect the reaction liquid that falls on the surface of the foil rod, thereby preventing the belt transmission component from being corroded.

[0025] In order to fully ensure the durability of the outer sleeve;

[0026] As a further improvement of the above technical solution: the connecting pipe and the lower pipe body are an integrally formed polytetrafluoroethylene tube structure, and the connecting frame, connecting rod and blades are all polytetrafluoroethylene structures.

[0027] The beneficial effect of this improvement is that the portion of the outer sleeve that is in contact with the reaction liquid for a long time is made of corrosion-resistant polytetrafluoroethylene, thereby effectively improving the durability of the outer sleeve.

[0028] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a cross-sectional structural diagram of the utility model;

[0030] Figure 2 It is a structural diagram of the utility model;

[0031] Figure 3 This is a schematic structural diagram of the outer sleeve of the utility model;

[0032] Figure 4 This is a schematic structural diagram of the clamping frame in the utility model;

[0033] Figure 5 It is an enlarged view of A in the present utility model;

[0034] In the figure: 1. reaction vessel; 2. motor; 3. belt drive assembly; 4. outer sleeve; 41. connecting pipe; 42. collecting tank; 43. lower tube body; 44. overflow tank; 45. connecting frame; 46. connecting rod; 47. paddle; 5. clamping frame; 51. L-shaped rod; 52. sleeve; 53. tightening bolt; 6. foil rod; 7. copper rod; 8. discharge valve; 9. exhaust valve. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0036] Example 1:

[0037] like Figure 1—5 shows: a low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors, comprising a reaction vessel 1, a discharge valve 8 being installed at the bottom of the reaction vessel 1, a motor 2, a clamping frame 5, a copper rod 7 and an exhaust valve 9 being installed at the top of the reaction vessel 1, the motor 2 being connected to an outer sleeve 4 through a belt transmission assembly 3, the outer sleeve 4 being rotatably clamped on the reaction vessel 1, a foil rod 6 being inserted into the inner side of the outer sleeve 4, the foil rod 6 being adapted to be clamped on the clamping frame 5, the outer sleeve 4 comprising a connecting pipe 41, the bottom end of the connecting pipe 41 being connected to a lower tube body 43, an overflow groove 44 being provided on the top side of the lower tube body 43, a connecting frame 45 being connected to the lower side of the inner wall of the lower tube body 43, and the connecting frame 45 being connected to the lower side of the inner wall of the lower tube body 43 by a connecting rod 46. It is connected to a paddle 47. When the paddle 47 in the outer sleeve 4 rotates, the reaction liquid can flow from bottom to top to flush away the air bags attached to the surface of the foil rod 6, so that the foil rod 6 is in full and uniform contact with the reaction liquid, thereby ensuring the accuracy of the test. The clamping frame 5 includes an L-shaped rod 51, which is installed on the top of the reaction vessel 1. One end of the L-shaped rod 51 is connected to a sleeve 52, and the foil rod 6 is slidably inserted into the sleeve 52. The side of the sleeve 52 is provided with an internal threaded through hole structure for threaded connection with a tightening bolt 53 along the radial direction of the sleeve 52. The operator can screw the tightening bolt 53 so that the end of the tightening bolt 53 presses against the side of the foil rod 6 to firmly fix the foil rod 6 in the sleeve 52. The axis of the sleeve 52 is aligned with the paddle 47 and the lower tube body. The axes of 43 are collinear, and the reaction liquid transported when the paddles 47 rotate can flow upward evenly along the curved side of the foil rod 6, while flushing and removing the air bags attached to the surface of the foil rod 6, so that the surface of the foil rod 6 is evenly in contact with the reaction liquid. The connecting frame 45 is a cross-shaped plate structure, and the four ends of the connecting frame 45 can be firmly connected to the inner wall of the lower tube body 43, thereby providing stable support for the connecting rod 46 and the paddles 47 installed on the connecting rod 46, and allowing the reaction liquid to flow upward smoothly. When the bottom end of the foil rod 6 contacts the top surface of the connecting frame 45, the top end of the foil rod 6 is not lower than the top end of the sleeve 52. Under the support of the connecting frame 45, the top end of the foil rod 6 is always not lower than the sleeve 52, thereby preventing the foil rod 6 from falling into the inner part of the outer sleeve 4 as a whole. To facilitate removal, there are multiple overflow grooves 44 and they are equidistantly spaced around the axis of the lower tube body 43. When the reaction liquid flows upward under the push of the paddle 47, it can be discharged smoothly through the multiple overflow grooves 44. The top of the connecting tube 41 is provided with a collecting groove 42. The collecting groove 42 is a tapered groove structure that is wide at the top and narrow at the bottom. The collecting groove 42 can effectively collect the reaction liquid that falls on the surface of the foil rod 6 to prevent the belt drive assembly 3 from being corroded. The connecting tube 41 and the lower tube body 43 are an integrally formed polytetrafluoroethylene tube structure. The connecting frame 45, the connecting rod 46, and the paddle 47 are all polytetrafluoroethylene structures. The parts of the outer sleeve 4 that are in contact with the reaction liquid for a long time are made of corrosion-resistant polytetrafluoroethylene, thereby effectively improving the durability of the outer sleeve 4.

[0038] The working principle of this technical solution is as follows: the foil rod 6 is slid through the sleeve 52 and vertically downwardly penetrated into the inner side of the outer sleeve 4, and the bottom end of the foil rod 6 is ensured not to contact the connecting frame 45. Then, the tightening bolt 53 is tightened so that the end of the tightening bolt 53 presses the foil rod 6 to fix the position of the foil rod 6. The power line is electrically connected to the copper rod 7 so that the copper rod 7 is energized to electrolyze the reaction liquid. The motor 2 is started so that the motor 2 drives the outer sleeve 4 to rotate on the reaction container 1 through the belt transmission assembly 3. The paddle 4 in the outer sleeve 4 is rotated. When 7 rotates, the reaction liquid below flows upward under the transport of the paddle 47, and the upward-flowing reaction liquid quickly washes away the air pockets attached to the surface of the foil rod 6, and then overflows through the overflow trough 44 and flows back into the reaction container 1. The gas is discharged through the connecting pipe 41 and the exhaust valve 9, thereby effectively preventing the air pockets from adhering to the surface of the foil rod 6 and affecting the full contact between the foil rod 6 and the reaction liquid. After the reaction is completed, the power supply of the copper rod 7 is disconnected, the foil rod 6 is removed, and the weight change of the foil rod 6 is measured.

[0039] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0040] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors, characterized by: The invention comprises a reaction container (1), wherein a discharge valve (8) is installed at the bottom of the reaction container (1), and a motor (2), a clamping frame (5), a copper rod (7) and an exhaust valve (9) are installed at the top of the reaction container (1). The motor (2) is connected to an outer sleeve (4) through a belt transmission assembly (3). The outer sleeve (4) is rotatably clamped on the reaction container (1). A foil rod (6) is inserted into the inner side of the outer sleeve (4), and the foil rod (6) is clamped on the clamping frame (5). The outer sleeve (4) comprises a connecting pipe (41), the bottom end of the connecting pipe (41) is connected to a lower tube body (43), the top side of the lower tube body (43) is provided with an overflow groove (44), the lower side of the inner wall of the lower tube body (43) is connected to a connecting frame (45), and the connecting frame (45) is connected to a paddle (47) through a connecting rod (46).

2. The low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors according to claim 1, characterized in that: The clamping frame (5) comprises an L-shaped rod (51), the L-shaped rod (51) being mounted on the top of the reaction vessel (1), one end of the L-shaped rod (51) being connected to a sleeve (52), the foil rod (6) being slidably inserted into the sleeve (52), and an internal threaded through hole structure for threadedly connecting a tightening bolt (53) being provided on the side surface of the sleeve (52) along the radial direction of the sleeve (52).

3. The low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors according to claim 2, characterized in that: The axis of the sleeve (52) is collinear with the axes of the blade (47) and the lower tube (43).

4. The low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors according to claim 1, characterized in that: The connecting frame (45) is a cross-shaped plate structure.

5. The low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors according to claim 1, characterized in that: When the bottom end of the foil rod (6) contacts the top surface of the connecting frame (45), the top end of the foil rod (6) is not lower than the top end of the sleeve (52).

6. The low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors according to claim 1, characterized in that: The overflow grooves (44) are multiple in number and are arranged at equal intervals around the axis of the lower tube body (43).

7. The low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors according to claim 1, characterized in that: A collecting groove (42) is provided at the top end of the connecting pipe (41), and the collecting groove (42) is a tapered groove structure that is wide at the top and narrow at the bottom.

8. The low-voltage anode foil corrosion resistance testing device for lead-free electrolytic capacitors according to claim 1, characterized in that: The connecting pipe (41) and the lower pipe body (43) are integrally formed polytetrafluoroethylene pipe structures, and the connecting frame (45), the connecting rod (46) and the blade (47) are all polytetrafluoroethylene structures.

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