Insulating edge clamping strip of cathode plate for electrolysis

Abstract

A cathode plate insulation edge clamping strip for electrolysis comprises a clamping groove for clamping a cathode plate and a circular groove for containing an expansion rod, the directions of groove openings of the clamping groove and the circular groove are opposite, the clamping groove is a straight groove, the range of a groove cavity of the circular groove is larger than a semicircle, the clamping groove and the circular groove share a groove bottom, and symmetric planes in the groove width direction of the clamping groove and the circular groove are coplanar; the whole groove wall of the groove bottom section of the clamping groove is an equal-thickness groove wall, the groove wall of the groove middle section of the clamping groove is gradually and slowly thinned from the groove cavity to the groove wall of the groove opening, and the groove wall of the groove opening section of the clamping groove is sharply thinned from the groove cavity to the groove opening; the whole groove wall of the circular groove is equal in thickness; the joint of the outer wall face of the groove wall of the circular groove and the outer wall face of the groove bottom section groove wall and the outer wall face of the groove middle section groove wall of the clamping groove smoothly extends in an inwards-concave mode. According to the technical scheme, the stability and reliability of tightly clamping the negative plate by the edge clamping strip are improved, the smoothness of the edges of the two sides of a finished product plate obtained through electrolysis is improved, and electrolysis flaws are reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of copper electrolysis equipment, and particularly relates to an insulating edge strip for a cathode plate for electrolysis. BACKGROUND

[0002] The electrolysis process of copper is a process of extracting high-purity copper from an anode plate and a cathode plate in an electrolytic cell, wherein the anode plate is prepared by fire refining and casting of crude copper; the cathode plate has two types, one of which is a titanium plate or a stainless steel plate as a cathode, and the other of which is a titanium plate as a cathode plate to prepare a seed plate, also known as a cathode plate. The former is a reusable cathode plate, and the latter is a seed plate together with the copper on the seed plate as a commodity copper.

[0003] The titanium plate or the stainless steel plate as the reusable cathode plate needs to be provided with an insulating edge strip on both side edges; when the titanium plate is used as the cathode plate to prepare the seed plate, the insulating edge strip is provided on the bottom edge in addition to the two side edges of the cathode plate, so as to obtain a seed plate with required quality and appearance.

[0004] A patent document with the title of "An electrolytic cathode plate high-tightness co-extrusion composite insulating edge strip" (document number CN208250434U, hereinafter referred to as document 1) discloses a technical solution, which includes a pear-shaped insulating edge strip main body with a top end provided with a long slot and an oval fastening slot at the bottom, and an oval cross-section fastening rod inserted into the oval fastening slot.

[0005] A patent document with the title of "An insulating edge strip for a wet copper refining cathode plate" (document number CN208250435U, hereinafter referred to as document 2) discloses a technical solution, which includes an insulating edge strip main body provided with a tapered slot at the front and a circular arc slot at the back along the length direction, and a tensioning round rod capable of being clamped in the circular arc slot; the cross-section shape of the insulating edge strip main body is an isosceles trapezoid with a tapered slot at the bottom, a circular arc slot at the top, and four circular arc corners, and the width of the bottom is smaller than that of the top.

[0006] The cross section of the insulating edge strip body 1 disclosed in document 1 is a symmetrical pear shape with a long slot 4 at the top end and an oval fastening groove 5 at the bottom, which causes the slot wall at the bottom of the long slot 4 to be too thick and the slot wall at the opening of the long slot 4 to be too thin. In addition, the oval shape of the fastening rod 2 contributes little to the support of the opening of the slot wall of the long slot 4, which makes it impossible to guarantee the tightness of the long slot 4 in clamping the cathode plate. In addition, similar to document 1, the cross-sectional profile of the insulating edge strip in CN202989306U, CN205420574U and CN111926350A is basically the same parabolic shape, and the problem of tight clamping of the cathode plate is common, and the material consumption is serious.

[0007] The schemes disclosed in documents 1 and 2 are to provide the edge strip only on both sides of the cathode plate, which belongs to the conventional scheme of preparing the copper product from the cathode plate that can be reused, and does not involve the preparation of the cathode plate for the initial plate. In fact, the structure scheme of the combination part of the insulating edge strip on the side stand of the cathode plate for preparing the initial plate in the prior art and the insulating edge strip on the bottom edge all have the problems of poor combination tightness and poor connection reliability and stability, which leads to the problem of mutual copper connection of the initial plate on the front and back surfaces of the cathode plate, and the problem of defects or even serious defects of the initial plate at the upper edge of the insulating edge strip on the bottom edge.

[0008] The name of the cathode plate insulating edge strip for the metallurgical industry (document number CN201169646Y, hereinafter referred to as document 3) is composed of an upper edge 2, a lower arm 5 and a bottom pin 4, which are all composed of ABS-PVC copolymer material. This cathode plate insulating edge strip has a groove 3 along its longitudinal direction, so that the two edges of the groove 3 can be clamped on the cathode plate 1. This scheme has the following obvious defects: first, the groove 3 is a closed slot cavity with a concave surface, which causes a large area of separation between the slot wall and the cathode plate 1. If there is a clamping part between the groove edge and the cathode plate 1, the electrolyte will be immersed on the surface of the cathode plate 1 in the slot cavity or even the electrolytic copper on both sides of the cathode plate 1; second, the common slot bottom of the groove 3 and the circular slot for accommodating the bottom pin 4 is too thick, which causes the tightening moment of the bottom pin 4 to the lower arm 5 to be unable to be transmitted to the slot wall and the slot opening of the groove 3, and the setting of the pin 4 cannot achieve the purpose of clamping the cathode plate. SUMMARY

[0009] The present application provides an electrolytic cathode plate insulating edge strip, which improves the stability and reliability of the cathode plate clamped by the edge strip, improves the flatness of the two side edges of the finished plate obtained by electrolysis and reduces the electrolysis defects.

[0010] The utility model provides an insulating edge strip for cathode plate of electrolysis, and the insulating edge strip comprises a clamping groove for clamping the cathode plate and a circular groove for accommodating a tensioning rod, the clamping groove and the circular groove are opposite in groove opening direction, the groove cavity of the circular groove is larger than a semicircle, the clamping groove and the circular groove share a groove bottom wall, and the symmetrical planes of the clamping groove and the circular groove in the groove width direction are coplanar, characterized in that the clamping groove is a straight groove, the groove wall of the groove bottom section of the clamping groove is an equal-thickness groove wall, the groove wall of the middle section of the clamping groove gradually and slowly thins from the groove cavity to the groove opening, and the groove wall of the groove opening section of the clamping groove sharply thins from the groove cavity to the groove opening; the groove wall of the circular groove is an equal-thickness groove wall; and the outer wall surface of the groove wall of the circular groove is smoothly and continuously connected to the outer wall surface of the groove bottom section and the middle section of the clamping groove in a concave manner.

[0011] The above scheme first solves the reliability and stability of the tight clamping of the clamping groove on the cathode plate, and the setting scheme that the outer wall surface of the groove wall of the circular groove is smoothly and continuously connected to the outer wall surface of the groove bottom section and the middle section of the clamping groove in a concave manner not only saves material consumption but also is beneficial to the outer expansion force of the groove wall of the circular groove as a bending moment trend to make the groove wall of the clamping groove in a folded state to obtain a stable clamping force. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic diagram of the utility model;

[0013] Figure 2 is Figure 1 a partial enlarged view of the groove opening section and the groove along section of the clamping groove;

[0014] Figure 3 is a front view of the cathode plate on which the insulating edge strip is installed;

[0015] Figure 4 is a perspective view of the cathode plate on which the insulating edge strip is installed;

[0016] Figure 5 is Figure 4 a partial enlarged view of the lower right corner of the cathode plate;

[0017] Figure 6 , 7 is a perspective view of the insulating edge strip in the utility model when the insulating edge strip is disassembled;

[0018] Figure 8 is a structural schematic diagram of the combination of the insulating edge strip at the standing edge of the cathode plate and the insulating edge strip at the bottom edge of the cathode plate. DETAILED DESCRIPTION

[0019] Reference Figures 1-6As shown, an electrolysis cathode plate insulation edge strip, the edge strip 10 includes a clamping groove 11 clamping the cathode plate 1 and a circular groove 12 accommodating the expansion rod 2, the clamping groove 11 and the circular groove 12 are opposite in direction of the groove opening, the cavity range of the circular groove 12 is greater than half a circle, the clamping groove 11 and the circular groove 12 share a groove bottom wall 13 and the symmetrical plane of the groove width direction of the clamping groove 11 and the circular groove 12 is coplanar, characterized in that: the clamping groove 11 is a straight groove, the groove bottom section groove wall 111 of the clamping groove 11 is an equal-thickness groove wall as a whole, the groove middle section groove wall 112 of the clamping groove 11 gradually and slowly thins from the cavity to the groove opening, and the groove opening section groove wall 113 of the clamping groove 11 sharply thins from the cavity to the groove opening; the groove wall 121 of the circular groove 12 is an equal-thickness groove wall as a whole; the outer wall surface of the groove wall of the circular groove 12 and the outer wall surface of the groove bottom section groove wall 111 and the groove middle section groove wall 112 of the clamping groove 11 are smoothly and continuously connected in a concave manner.

[0020] The above scheme first solves the reliable clamping of the cathode plate 1 by the clamping groove 11, based on the fact that the groove bottom section groove wall 111 of the clamping groove 11 is an equal-thickness groove wall as a whole and the groove middle section groove wall 112 of the clamping groove 11 gradually and slowly thins from the cavity to the groove opening, most of the groove wall of the clamping groove 11 from the bottom to the opening has reliable strength to maintain its basic shape, so that the inner wall surface of the clamping groove 11 and the cathode plate 1 achieve a large-area adhering state to obtain the pressure between the adhering surfaces, which not only solves the insulation problem between the two side plate surfaces of the cathode plate 1 but also avoids the possibility of the edge strip sliding downward, and the thinning of the groove wall at the opening of the clamping groove 11 is conducive to the good elastic deformation capacity of the groove wall at the opening, so that the tightness of the clamping groove 11 clamping the cathode plate 1 can be maintained; after the expansion rod 2 is accommodated in the circular groove 12, the groove wall of the circular groove 12 has a tendency to expand outward, and when this deformation tendency is transmitted to the smooth concave surface part of the connection between the outer wall surface of the groove wall of the circular groove 12 and the outer wall surface of the groove bottom section groove wall 111 and the groove middle section groove wall 112 of the clamping groove 11, the concave surface part is further squeezed to transmit the bending moment to the outer wall surface of the groove wall of the clamping groove 11, and the cavity of the clamping groove 11 has a stable tendency to contract to improve the tightness, reliability and stability of clamping the cathode plate 1.

[0021] Referring to Figure 1 In the embodiment shown, the cavity depth of the groove bottom section groove wall 111 is 1 / 3-2 / 5 of the cavity depth of the clamping groove 11, the cavity depth of the groove middle section groove wall 112 is 2 / 5-1 / 2 of the cavity depth of the clamping groove 11, and the thickness of the groove bottom wall 13 is consistent with the thickness of the groove bottom section groove wall 111.

[0022] The groove depth h1 of the bottom section groove wall 111 is 1 / 3 to 2 / 5 of the groove depth H of the clamping groove 11, and the groove depth h2 of the middle section groove wall 112 is 2 / 5 to 1 / 2 of the groove depth H. The groove depth h1 of the bottom section groove wall 111 has a basically uniform wall thickness, which ensures the basic strength of the clamping groove 11. In specific implementation, the wall thickness of the bottom section groove wall 111 should be slightly greater than the groove width of the clamping groove 11, and the groove depth h2 of the middle section groove wall 112 should be slightly greater than the groove depth h1 of the bottom section groove wall 111. Wall 112 occupies most of the height of the groove wall, so the overall groove wall of the clamping groove 11 has reliable strength; the thickness of the bottom wall 13 is the same as the thickness of the bottom section groove wall 111, that is, the wall thickness of the two can be basically the same, or the thickness of the bottom wall 13 can be slightly greater or less than the thickness of the bottom section groove wall 111. This not only realizes the complete connection structure between the circular groove 12 and the clamping groove 11, but also ensures that the outward bending moment on the groove wall of the circular groove 12 is transferred to the bottom section groove wall 111 and even to the entire groove wall of the clamping groove 11. At the same time, the material used for the entire clamping strip can be significantly saved.

[0023] Preferably, the angle α between the outer wall of the middle section of the groove wall 112 and the bottom wall 13 is 75±3°, and the angle β between the outer wall of the groove opening section of the groove wall 113 and the bottom wall 13 is 40±3°. Here, the bottom wall 13 should be based on the bottom 131 of the groove cavity. Therefore, the wall thickness change process of the middle section of the groove wall 112 is relatively slow, while the wall thickness change process of the groove opening section of the groove wall 113 is relatively drastic. This ensures that the groove opening section of the groove wall 113 has sufficient overall wall thickness before transitioning to the groove edge 114, providing reliable support for the groove edge.

[0024] Reference Figure 1 , 2 The preferred embodiment shown has a groove edge 114 perpendicular to the groove depth direction at the top of the outer wall of the groove section 113. The groove edge 114 is formed by the tangent surface of the inner and outer walls of the groove section 113, with the inner side having a small radius (r) and the outer side having a large radius (R). Given that the thickness of the cathode plate 1 is approximately 3 mm, the dimension of the groove edge 114 in the groove width direction is selected to be approximately 0.2 mm, and the thickness of the bottom of the groove section 113 in the groove width direction is approximately 1.5 mm. The groove edge 114 constructed in the above embodiment can ensure the flatness of the edge shape of the finished plate to improve its edge quality. The small radius (r) chamfer transition of the inner wall improves the smoothness of the operation of the clamping strip to clamp the cathode plate 1. At the same time, the small radius (r) chamfer transition of the inner wall also facilitates the uniform compression of the inner side of the groove edge 114 towards the plate surface of the cathode plate 1 after the circular groove 12 is tightened, improving the sealing of the fit. The tangent surface formed by the large R chamfer transition on the outer wall and the small R chamfer on the inner wall restricts the shape of the finished plate edge, greatly reducing burrs on the finished plate edge and thus saving time for subsequent manual processing.

[0025] Preferably, referring to Figure 1 As shown in the figure, the groove range of the circular groove 12 is 2 / 3 of the circumference, and the groove width of the clamping groove 11 is 1 / 4-1 / 3 of the diameter of the groove cavity of the circular groove 12.

[0026] The groove range of the circular groove 12 being 2 / 3 of the circumference enables the expansion rod 2 to provide sufficient torque by expanding the groove wall of the circular groove 12 after being installed in the circular groove 12, and the remaining 1 / 3 of the circumference range facilitates the installation of the expansion rod 2. The groove width of the clamping groove 11 being 1 / 4-1 / 3 of the diameter of the groove diameter of the circular groove 12 facilitates the provision of sufficient bending moment to extrude the outer wall surface of the groove wall of the circular groove 12 after the expansion of the circular groove 12, and the outer wall surface of the groove wall 111 of the groove bottom section and the groove wall 112 of the groove middle section of the clamping groove 11 forms a concave area, thereby providing reliable clamping force for the clamping of the cathode plate 1 by the clamping groove 11.

[0027] More preferably, referring to Figure 1 As shown in the figure, the width of the groove cavity bottom 131 of the clamping groove 11 is consistent with the thickness of the cathode plate 1, and the slot width is 0.02-0.03 mm less than the thickness of the cathode plate 1.

[0028] The width of the groove cavity bottom 131 of the clamping groove 11 being consistent with the thickness of the cathode plate 1 enables the plate edge of the cathode plate 1 to be closely attached to the groove cavity bottom 131 of the clamping groove 11, and the plate surface on the side of the plate edge of the cathode plate 1 to be closely attached to the inner wall surface of the groove wall of the clamping groove 11, thereby ensuring the overall insulation effect at the plate edge of the cathode plate 1; the slot width of the clamping groove 11 being 0.02-0.03 mm less than the thickness of the cathode plate 1 enables the clamping groove 11 to apply effective clamping to the cathode plate 1 in a pre-tightened state before the expansion rod 2 is inserted.

[0029] Referring to Figure 1 As shown in the figure, the thickness of the groove wall 111 of the groove bottom section of the clamping groove 11 is 0.5-0.8 mm greater than the thickness of the cathode plate 1, and the thickness of the groove wall of the circular groove 12 is consistent with the thickness of the cathode plate 1. After selecting the above preferred parameters, an optimal solution is achieved in terms of the performance, material consumption, and processing cost of the clamping edge strip.

[0030] Preferably, referring to Figures 2-6 As shown in the figure, the abutting ends of the clamping edge strip 10 clamped on the two side edges and the bottom edge of the cathode plate 1 are connected in a mortise and tenon type.

[0031] When producing different kinds of finished plates, such as commodity copper and starting plate, the insulation requirements of the edge of the cathode plate 1 are different. For example, when preparing the starting plate, the bottom edge of the cathode plate 1 needs to be insulated. However, a large amount of insoluble impurities will be generated in the copper electrolysis process, and the insoluble impurities are easy to accumulate on the outer wall surface of the edge clamping strip 10 at the bottom edge of the cathode plate 1, thereby causing the edge clamping strip 10 at the bottom edge of the cathode plate 1 to fall off. By connecting the edge clamping strip 10 at the bottom edge of the cathode plate 1 and the edge clamping strip 10 at the two side edges of the cathode plate 1 through the abutting end mortise and tenon connection, the edge clamping strip at the bottom edge of the cathode plate 1 can be stably clamped on the bottom edge of the cathode plate 1.

[0032] Specific embodiments refer to Figures 2-6 As shown in the drawings, the recessed notch 14 is arranged on the clamping groove 11 at the lower end of the edge clamping strip 10 at the side edge of the cathode plate 1, and the missing part 15 is arranged at the circular groove 12 at the two ends of the edge clamping strip 10 at the bottom edge of the cathode plate 1. The clamping groove 11 at the two ends of the edge clamping strip 10 at the bottom edge of the cathode plate 1 is inserted into the recessed notch 14 arranged on the clamping groove 11 at the lower end of the edge clamping strip 10 at the side edge of the cathode plate 1.

[0033] The recessed notch 14 is arranged on the clamping groove 11, and the missing part 15 is arranged on the circular groove 12, which ensures the integrity of the insulation performance of the joint between the edge clamping strip at the side edge of the cathode plate 1 and the edge clamping strip at the bottom edge of the cathode plate 1. The recessed notch 14 and the missing part 15 are connected through mortise and tenon connection, thereby ensuring the stability of the connection between the edge clamping strip 10 at the bottom edge of the cathode plate 1 and the edge clamping strip 10 at the side edge of the cathode plate 1, and especially the surplus clamping force of the edge clamping strip at the side edge contributes to the edge clamping strip at the bottom edge, thereby ensuring the stability and reliability of the insulation and clamping state of the two sides and the bottom edge of the cathode plate 1.

[0034] In combination Figure 8 When the edge clamping strip 10 at the side edge and the edge clamping strip 10 at the bottom edge are riveted, the groove cavity bottoms 131 in the groove cavities of the two clamping grooves 11 intersect with each other, which completely blocks the electrical connection path between the starting plates between the two plate surfaces of the cathode plate 1, thereby obtaining two completely independent starting plates in the electrolysis of the two plate surfaces of the cathode plate 1.

[0035] Further, the depth of the recessed notch 14 is greater than or equal to the groove depth of the clamping groove 11, the size of the groove length direction of the missing part 15 is less than or equal to the depth of the recessed notch 14, and the groove cavity bottom 131 in the groove cavity of the clamping groove 11 of the edge clamping strip 10 at the bottom edge extends to the end face of the clamping groove 11. This scheme completely solves the reliable insulation between the side edge and the bottom edge of the cathode plate 1, that is, the insulation at the corner of the two lower edges of the cathode plate 1 is reliably achieved.

[0036] The edge clamping strip in the present application is made of modified PPO material, and the technical scheme provided in the present application also ensures that the edge clamping strip has the advantage of small creep after being soaked in electrolyte, thereby improving the service life of the edge clamping strip.

Claims

1. An electrolysis cathode plate insulation edge strip, the edge strip (10) comprising a clamping groove (11) clamping a cathode plate (1) and a circular groove (12) accommodating a tensioning rod (2), the clamping groove (11) and the circular groove (12) have opposite slot opening directions, the slot cavity range of the circular groove (12) is greater than half a circle, the clamping groove (11) and the circular groove (12) share a slot bottom wall (13), and the symmetrical planes of the clamping groove (11) and the circular groove (12) in the slot width direction are coplanar, characterized in that: The clamping groove (11) is a straight groove, the groove bottom section groove wall (111) of the clamping groove (11) is an equal-thickness groove wall as a whole, the groove middle section groove wall (112) of the clamping groove (11) gradually and slowly thins from the groove cavity to the groove opening, and the groove opening section groove wall (113) of the clamping groove (11) sharply thins from the groove cavity to the groove opening; the groove wall (121) of the circular groove (12) is an equal-thickness groove wall as a whole; the groove wall outer wall surface of the circular groove (12) and the outer wall surface of the groove bottom section groove wall (111) and the groove middle section groove wall (112) of the clamping groove (11) are in smooth and smooth connection in a concave manner.

2. The cathode plate insulation edge strip for electrolysis according to claim 1, characterized in that: The groove cavity depth of the groove bottom section groove wall (111) is 1 / 3-2 / 5 of the groove cavity depth of the clamping groove (11), the groove cavity depth of the groove middle section groove wall (112) is 2 / 5-1 / 2 of the groove cavity depth of the clamping groove (11), and the groove bottom wall (13) thickness is consistent with the groove bottom section groove wall (111) thickness.

3. The cathode plate insulation edge strip for electrolysis according to claim 1, characterized in that: The angle between the outer wall of the groove middle section groove wall (112) and the groove bottom wall (13) is 75±3°, and the angle between the outer wall of the groove opening section groove wall (113) and the groove bottom wall (13) is 40±3°.

4. The cathode plate insulation edge strip for electrolysis according to claim 2 or 3, characterized in that: The outer wall of the groove opening section groove wall (113) has a groove along (114) perpendicular to the groove depth direction, and the groove along (114) is a tangent surface formed by the arc surface chamfer transition of the inner and outer walls of the groove opening section groove wall (113).

5. The cathode plate insulation edge strip for electrolysis according to claim 1 or 2 or 3, characterized in that: The groove domain range of the circular groove (12) is 2 / 3 of the circumference, and the groove width of the clamping groove (11) is 1 / 4-1 / 3 of the groove cavity diameter of the circular groove (12).

6. The cathode plate insulation edge strip for electrolysis according to claim 5, characterized in that: The groove cavity bottom (131) width of the clamping groove (11) is consistent with the cathode plate (1) thickness, and the groove opening width is 0.02-0.03 mm less than the cathode plate (1) thickness.

7. The cathode plate insulation edge strip for electrolysis according to claim 5, characterized in that: The groove bottom section groove wall (111) thickness of the clamping groove (11) is 0.5-0.8 mm greater than the cathode plate (1) thickness, and the groove wall thickness of the circular groove (12) is consistent with the cathode plate (1) thickness.

8. The cathode plate insulation edge strip for electrolysis according to claim 1 or 2 or 3, characterized in that: The abutting ends of the clamping edge strips (10) clamped on the two side edges and the bottom edge of the cathode plate (1) are in a mortise and tenon type connection.

9. The cathode plate insulation edge strip for electrolysis according to claim 8, characterized in that: The clamping groove (11) at the lower end of the clamping edge strip (10) at the side edge of the cathode plate (1) is provided with a concave notch (14), the circular groove (12) parts at the two ends of the clamping edge strip (10) at the bottom edge of the cathode plate (1) have a missing part (15), and the clamping groove (11) at the two ends of the clamping edge strip (10) at the bottom edge of the cathode plate (1) is inserted into the concave notch (14) provided in the clamping groove (11) at the lower end of the clamping edge strip (10) at the side edge of the cathode plate (1).

10. The cathode plate insulation edge strip for electrolysis according to claim 9, characterized in that: When the clamping edge strips (10) at the side edge and the clamping edge strips (10) at the bottom edge are in a riveting state, the groove cavity bottoms (131) in the groove cavities of the two clamping grooves (11) intersect with each other.

11. The cathode plate insulation edge strip for electrolysis according to claim 10, characterized in that: The depth of the concave notch (14) is greater than or equal to the groove depth of the clamping groove (11), the groove length direction size of the missing part (15) is less than or equal to the depth of the concave notch (14), and the groove cavity bottom (131) in the groove cavity of the clamping groove (11) of the clamping edge strip (10) at the bottom edge continues to the end face of the clamping groove (11).

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