Anode tool clamp for electrolytic corrosion of turbine guide blade casting

Abstract

The utility model relates to an anode tool clamp for electrolytic corrosion of a turbine guide vane casting, and belongs to the field of electrolytic machining. The electrolytic corrosion device solves at least one of the problems that an existing electrolytic corrosion device for the turbine guide blade casting is prone to under-corrosion or over-corrosion and poor in adaptability, the precision casting surface of a blade is prone to being scratched, and the blade is prone to shaking to affect the electrolytic effect. The anode tool clamp comprises an H-shaped main body bracket, a bracket and a blade positioning assembly, the main body support is mainly composed of supporting rods on the two sides and a cross beam connected with the supporting rods on the two sides. The lower ends of the supporting rods on the two sides are connected through a bracket. Each blade positioning assembly is mainly composed of a fixed part arranged on the cross beam and a movable part in threaded connection with the fixed part. The anode tool clamp provided by the utility model can adapt to turbine guide blades with different sizes, realizes stable clamping and uniform electrolytic corrosion treatment, and avoids scratching the precisely cast surfaces of the guide blades.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic processing, in particular to an anode fixture for electrolytic corrosion of turbine guide blade castings. Background Art

[0002] The grain size of turbine blade castings for aircraft engines and gas turbines is one of the most important metallurgical indicators of the product. Before the grain size test, the surface of the blade casting can be pre-treated by electrolytic corrosion. In the electrolytic corrosion processing of turbine blades, it is crucial to ensure that the conductivity of the anode (i.e., turbine blade casting) surface is uniform, which helps to avoid under-corrosion and over-corrosion. In existing electrolytic corrosion devices, the cathode usually adopts an annular structure, and the anode matches it and also adopts an annular structure. However, for guide blades that are larger in size and have large edge plate structural characteristics, existing electrolytic corrosion devices are difficult to ensure that the current is evenly and stably distributed on the surface of the guide blade to be corroded, and under-corrosion or over-corrosion is prone to occur. In addition, during the clamping process, the precision casting surface of the guide blade is easily scratched, or shaking occurs during electrolysis, affecting the uniformity of electrolysis. Utility Model Content

[0003] In view of the above analysis, the present invention aims to provide an anode fixture for electrolytic corrosion of turbine guide blade castings, so as to solve at least one of the following technical problems existing in the existing electrolytic corrosion devices for turbine guide blade castings: (1) under-corrosion or over-corrosion is likely to occur; (2) the adaptability to turbine guide blades of different sizes is poor; (3) the surface of the precision casting of the guide blades is likely to be scratched during the clamping process of the turbine guide blades; (4) the turbine guide blades are likely to shake or even fall off during the electrolysis process, thereby affecting the electrolysis effect.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] The utility model provides an anode fixture for electrolytic corrosion of turbine guide blade castings, the anode fixture comprising: an H-shaped main frame, a bracket, and a blade positioning assembly; wherein the main frame is mainly composed of support rods on both sides, namely a first support rod and a second support rod, and a crossbeam connecting the support rods on both sides; the lower ends of the support rods on both sides are connected by the bracket, and the upper ends of the first support rod and the second support rod respectively include a first anode hook portion and a second anode hook portion; a space for accommodating the guide blade is formed between the crossbeam and the bracket;

[0006] There are one or more blade positioning assemblies, each of which is mainly composed of a fixed part arranged on the beam and a movable part threadedly connected to the fixed part. The lower end of the movable part is used to abut the residual part of the upper edge plate of the guide blade.

[0007] Furthermore, the bracket is mainly composed of a rectangular outer frame and a plurality of metal strips arranged in parallel between two long sides of the rectangular outer frame.

[0008] Furthermore, each metal strip has a hole structure extending through the thickness direction.

[0009] Furthermore, the number N of the plurality of metal strips satisfies: N≥M+1, where M is the number of guide blades to be electrolytically corroded; and / or,

[0010] The distance S1 between any two adjacent metal strips satisfies: S1 ≥ W1, where W1 is the width of the lower edge plate of the guide vane to be electrolytically corroded located between the two adjacent metal strips.

[0011] Furthermore, the distance S2 between any two adjacent moving parts satisfies: S2 ≥ W2 + 30 mm, where W2 is the sum of the widths of the upper edge plates of the guide vanes to be electrolytically corroded located between the two adjacent moving parts.

[0012] Furthermore, the fixing part is a nut, the moving part is a bolt rod, and the head of the bolt rod includes a handle.

[0013] Furthermore, the vertical distance h between the lower edge of the crossbeam and the upper edge of the bracket satisfies: h≥H+50 mm, where H is the maximum value of the total height of a single guide blade to be electrolytically corroded.

[0014] Furthermore, the sections of the first support rod and the second support rod located above the crossbeam further include a first bending portion and a second bending portion, respectively; and / or,

[0015] The H-shaped main frame, bracket and blade positioning components are made of titanium alloy or copper.

[0016] Furthermore, an enlarged end portion is provided at the lower end of the moving portion, and the contact surface between the enlarged end portion and the upper edge plate of the guide blade is designed to conform to the shape.

[0017] Furthermore, the connection methods of the multiple metal strips and the rectangular outer frame include fixed connection, detachable connection, and sliding connection.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0019] (1) The anode fixture provided by the present invention has a simple structure and is easy to operate. The crossbeam of the H-shaped main body bracket in the fixture and the bracket below together form a space, which can be used to accommodate turbine guide blades of various sizes. Based on the ingenious design of the blade positioning component, the movable end moves downward relative to the fixed part and abuts the upper edge plate of the guide blade, thereby being able to adapt to turbine guide blades of different sizes and achieve stable clamping and uniform electrolytic corrosion treatment. This innovative fixture structure improves the adaptability of the electrolytic corrosion device to turbine guide blades of different sizes and greatly improves the efficiency of the electrolytic corrosion treatment.

[0020] (2) The anode fixture of the present invention achieves stable clamping by abutting the lower end of the movable part in the blade positioning assembly with the residual part of the upper edge plate of the guide blade. This structural design not only effectively prevents the blade from shaking or falling during the electrolysis process, ensuring the stability of the clamping, but also avoids scratching the precision casting surface of the guide blade, thereby ensuring uniform corrosion of the precision casting surface of the blade (for example: the inner flow channel and blade body surface of the turbine guide blade).

[0021] (3) Compared with the prior art method of arranging the guide blades in a ring, the present invention adopts blade positioning components arranged along the same crossbeam, so that the guide blades can be arranged in a row. This innovative positional relationship between the components is more conducive to the uniform distribution of current in the inner flow channel and blade surface of the turbine guide blade, reducing the tip effect in the ring arrangement, helping to reduce the risk of local over-corrosion or under-corrosion, thereby improving the uniformity of the electrolytic corrosion process, and providing a reliable guarantee for the subsequent grain size inspection of the guide blades and improving the final blade quality.

[0022] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages will become apparent from the description or be understood through practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the contents particularly pointed out in the description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference symbols denote the same components.

[0024] Figure 1 A three-dimensional diagram of an anode fixture provided in an embodiment of the present utility model;

[0025] Figure 2 A schematic diagram of the main view of the anode fixture provided in an embodiment of the utility model;

[0026] Figure 3 A left side schematic diagram of an anode fixture provided in an embodiment of the present utility model;

[0027] Figure 4 A schematic top view of an anode fixture provided in an embodiment of the present utility model;

[0028] Reference numerals:

[0029] 100-main frame; 11-first support rod; 12-second support rod; 13-crossbeam; 11a-first anode hook portion; 11b-first bending portion; 12a-second anode hook portion; 12b-second bending portion; 200-bracket; 21-rectangular outer frame; 22-metal strip; 300-blade positioning assembly; 31-fixing portion; 32-moving portion; 400-anode; 41-first lead end; 42-second lead end. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0031] In order to solve the problems that occur during the electrolytic corrosion process of turbine guide blade castings, such as under-corrosion or over-corrosion, scratches on the precision casting surface during the clamping process, and the blades being prone to shaking during the electrolytic process, the inventors of the present utility model have conducted research and improvements to address the above-mentioned problems and provide an anode fixture for electrolytic corrosion of turbine guide blade castings, see Figures 1-4 ;

[0032] The anode fixture comprises an H-shaped main frame 100, a bracket 200, and a blade positioning assembly 300. The main frame 100 is mainly composed of support rods on both sides, namely a first support rod 11 and a second support rod 12, and a crossbeam 13 connecting the support rods on both sides. The lower ends of the support rods on both sides are connected by the bracket 200. The upper ends of the first support rod 11 and the second support rod 12 respectively include a first anode hook portion 11a and a second anode hook portion 12a. A space for accommodating the guide blades is formed between the crossbeam 13 and the bracket 200.

[0033] There are one or more blade positioning assemblies 300, and each blade positioning assembly 300 mainly consists of a fixed part 31 arranged on the beam 13 and a movable part 32 threadedly connected to the fixed part 31, and the lower end of the movable part 32 is used to abut the residual part of the upper edge plate of the guide blade.

[0034] The anode fixture provided by the utility model has a simple structure and is easy to operate. The crossbeam of the H-shaped main body bracket in the fixture and the bracket below together form a space, which is used to accommodate turbine guide blades of various sizes. It is based on the ingenious design of the blade positioning component, that is, the moving end moves downward relative to the fixed part and abuts the upper edge plate of the guide blade, so that it can adapt to turbine guide blades of different sizes and achieve stable clamping and uniform electrolytic corrosion treatment. This innovative fixture structure improves the adaptability of the electrolytic corrosion device to turbine guide blades of different sizes and greatly improves the efficiency of the electrolytic corrosion treatment.

[0035] In addition, the anode fixture of the present invention achieves stable clamping by abutting the lower end of the moving part in the blade positioning assembly with the residual part of the upper edge plate of the guide blade. This structural design not only effectively prevents the blade from shaking or falling during the electrolysis process, ensuring the stability of the clamping, but also avoids scratches on the precision casting surface of the guide blade, thereby ensuring uniform corrosion of the precision casting surface of the blade (for example: the inner flow channel and blade body surface of the turbine guide blade).

[0036] Compared to the prior art method of arranging guide vanes in a ring, the present invention utilizes blade positioning components arranged along the same crossbeam, allowing the guide vanes to be aligned in a straight line. This innovative positioning of the components facilitates even current distribution within the turbine guide vane's internal flow path and blade surface, reducing the tip effect found in the ring arrangement of prior electrolysis devices. This helps mitigate the risk of localized over- or under-corrosion, thereby improving the uniformity of the electrolytic corrosion process and providing reliable assurance for subsequent guide vane grain size testing and improving final blade quality.

[0037] In some preferred embodiments, the bracket 200 is primarily composed of a rectangular outer frame 21 and a plurality of metal strips 22 disposed parallel to the two long sides of the rectangular outer frame 21. This bracket structure maximizes contact between the turbine guide blades and the electrolyte, thereby improving electrolysis uniformity and efficiency.

[0038] Exemplarily, the shape of the metal strips includes but is not limited to a rectangle. The shapes of the plurality of metal strips can be the same or different; preferably, the shapes of the plurality of metal strips are the same.

[0039] In some preferred embodiments, each metal strip 22 has a through-thickness pore structure. During the electrolytic corrosion process, the through-thickness pore structure of the metal strip further ensures current stability and improves the uniformity of electrolytic corrosion. These pores allow residual electrolyte to pass through, which has the following benefits: promoting electrolyte flow, reducing local overheating, improving current distribution uniformity, and reducing dead zones in electrolyte flow.

[0040] Exemplarily, the hole structure includes a plurality of holes uniformly distributed on each metal strip 22 .

[0041] In one embodiment, the hole structure includes a plurality of holes evenly distributed along the entire length of each metal strip 22 .

[0042] It should be noted that the metal strips 22 configured on the bracket 200 also serve as a reference for clamping the guide vanes. Preferably, the number N of the multiple metal strips 22 satisfies the following: N ≥ M + 1, where M is the number of guide vanes to be electrolytically corroded. This structural design allows each guide vane to have a corresponding metal strip on both sides as a reference, enabling fast and precise clamping and improving the efficiency and convenience of the entire electrolytic corrosion process. In this way, each guide vane can easily find its proper position, ensuring consistency and repeatability in the processing process.

[0043] In some preferred embodiments, the spacing S1 between any two adjacent metal strips 22 satisfies: S1 ≥ W1, where W1 is the width of the lower edge plate of the guide blade to be electrolytically corroded located between the two adjacent metal strips. This structural design ensures that the spacing between the metal strips is sufficient to accommodate the guide blades, which is more beneficial for the uniformity of the electrolytic corrosion process and the precise positioning of the blades. Specifically, the guide blades are placed between two adjacent metal strips because the metal strips on both sides provide an intuitive reference. By controlling the spacing between the two sides of the guide blades and the inner side of the metal strips to be equal, the operator can quickly position the guide blades in the correct position, ensuring that the blades are distributed in parallel, making better use of the space in the electrolytic cell, and facilitating the uniform flow of the electrolyte between and around the guide blades, thereby achieving a more uniform corrosion effect.

[0044] In one embodiment, S1 = W1; when the spacing between two adjacent metal strips is exactly equal to the width of the lower edge plate of the guide vane to be electrolytically corroded, located between the two adjacent metal strips, this facilitates faster and more accurate positioning. The contact area between the metal strips and both sides of the guide vane increases, helping to provide a more stable and secure clamping and reducing movement or vibration of the vane during the electrolysis process. This improved clamping stability helps maintain consistency and uniformity in the electrolytic corrosion process and maximizes space utilization within the electrolytic cell.

[0045] Optionally, the connection between the plurality of metal strips 22 and the rectangular outer frame 21 includes fixed connection, detachable connection, and sliding connection. Figure 1 The metal strip 22 and the rectangular outer frame 21 are connected in a fixed manner.

[0046] In one embodiment, the connection between the metal strip 22 and the rectangular outer frame 21 is a detachable connection; specifically, the metal strip 22 has telescopic blocks at both ends, and the inner sides of the two long sides of the rectangular outer frame 21 are matched with multiple grooves. The telescopic blocks at both ends of the metal strip 22 are used to penetrate into the grooves to achieve fixation. The outer side of the rectangular outer frame 21 is also provided with a push-type switch, which pushes the telescopic block out of the groove through a connecting part (for example: a connecting rod and / or a spring).

[0047] In one embodiment, the metal strip 22 is connected to the rectangular outer frame 21 by a sliding connection; specifically, the metal strip 22 has protrusions at both ends, and the inner sides of the two long sides of the rectangular outer frame 21 are matched with sliding grooves. The protrusions at both ends of the metal strip 22 are used to move in the sliding grooves, and the outer side of the rectangular outer frame 21 is also provided with a locking mechanism, which tightens the protrusions through connecting parts (for example, bolts) to position the metal strip in the desired position.

[0048] Preferably, the spacing S2 between any two adjacent moving parts 32 satisfies the following: S2 ≥ W2 + 30 mm, where W2 is the sum of the widths of the upper edge plates of the guide blades to be electrolytically corroded located between the two adjacent moving parts. By ensuring that the spacing between the moving parts is not less than the sum of the widths of the upper edge plates of the blades plus a certain margin, it is possible to ensure that the electrolyte fully contacts the upper edge plates of the blades, avoiding uneven electrolysis due to insufficient contact. At the same time, it is possible to ensure uniform current distribution, avoiding uneven electrolysis due to excessive local current. Appropriate spacing can promote the flow of electrolyte between the blades, reduce electrolyte retention and concentration gradients, and thus improve the uniformity of the electrolysis process.

[0049] In some preferred embodiments, the spacing S2 between any two adjacent moving portions 32 satisfies the following: S2 = W2 + (40-60) mm, where W2 is the sum of the widths of the upper edge plates of the guide vanes to be electrolytically corroded located between the two adjacent moving portions. For example, S2 = W2 + 50 mm. By setting an appropriate margin (40-60 mm), the electrolyte can be ensured to flow evenly between and around the vanes, improving the uniformity of the electrolysis process. It can also maximize the use of space within the electrolytic cell, allowing more vanes to be placed in the cell for processing, thereby improving the space utilization and processing efficiency of the electrolytic device.

[0050] See also Figure 1 When the guide blades to be electrolytically corroded have the same size, the multiple moving parts 32 are distributed at equal intervals, and the multiple metal strips 22 are distributed in parallel at equal intervals. In this case, the guide blades to be electrolytically corroded are also distributed in parallel at equal intervals to obtain a more uniform electrolytic corrosion effect.

[0051] It can be understood that the value range of W2 is 0<W2<(W a +W b). W a and W b They respectively represent the width of the upper edge plates of the two guide blades to be electrolytically corroded, where two adjacent moving parts abut against each other.

[0052] In one embodiment, each movable portion 32 abuts against the middle position of the upper edge plate of the guide blade. In this case, the distance S2 between any two adjacent movable portions 32 satisfies: S2 ≥ W2 + 30 mm, where W2 is half of the sum of the widths of the upper edge plates of the two guide blades to be electrolytically corroded that the two adjacent movable portions abut against.

[0053] In one embodiment, each blade positioning assembly includes a fixed portion 31 that is a nut, a movable portion 32 that is a bolt rod, and a head of the bolt rod that includes a handle. Figure 1 The handle is V-shaped. The combination of the nut and the bolt rod can provide a stable fixing force to ensure that the blade will not be displaced or vibrated during the electrolytic corrosion process. The threaded fit of the bolt rod and the nut can be fine-tuned to make the positioning of the blade more accurate. The structural design of the handle allows the bolt rod to be adjusted by manual rotation, which is convenient for the operator to quickly adjust the fixing position according to the height of the blade and effectively fix blades of different sizes. This not only facilitates operation, but also ensures the stability of the blade during the electrolytic corrosion process and the uniformity of the electrolytic corrosion.

[0054] In one embodiment, the lower end of the movable portion 32 of each blade positioning assembly is further provided with an enlarged end portion, which has a contoured contact surface with the upper edge plate of the guide blade. This enlarged end portion increases the contact area with the upper edge plate of the guide blade, which helps provide a more stable and secure clamping, reduces blade movement or vibration during the electrolysis process, prevents blade deflection, and ensures uniform electrolytic corrosion.

[0055] Optionally, the area S of the enlarged end portion provided at the lower end of the movable portion 32 satisfies: S ≥ 25 mm 2 . Preferably, 25mm 2 ≤S≤100mm 2 Properly enlarging the end area can not only improve the clamping stability, but also ensure that the clamping position is within the margin of the upper edge plate of the blade, avoiding scratches on the precision casting surface of the blade.

[0056] In one embodiment, the enlarged end portion is a 5 mm×5 mm square inclined surface with a bottom surface, and the inclined angle of the inclined surface is the same as the inclined angle of the margin portion of the upper edge plate of the guide blade.

[0057] Preferably, the vertical distance h between the lower edge of the crossbeam 13 in the main support 100 and the upper edge of the bracket 200 satisfies the following: h ≥ H + 50 mm, where H is the maximum total height of a single guide vane to be electrolytically corroded. By providing a certain distance between the crossbeam and the upper edge plate of the vane, excessive local current can be avoided, ensuring uniformity and stability of the electrolysis process.

[0058] In some preferred embodiments, the vertical distance h between the lower edge of the crossbeam 13 in the main frame 100 and the upper edge of the bracket 200 satisfies the following: h = H + (50-120) mm, where H is the maximum total height of a single guide vane to be electrolytically corroded. During the electrolytic corrosion process, maintaining an appropriate spacing of (50-120) mm not only ensures uniform current distribution and improves the uniformity of electrolytic corrosion, but also increases the compactness of the tooling structure and reduces electrolyte consumption. For example, h = H + 80 mm.

[0059] See also Figure 1 The first anode hook portion 11a and the second anode hook portion 12a are used to hang on the anode 400 in the electrolysis device. Exemplarily, the anode 400 is a linear anode with a first lead terminal 41 and a second lead terminal 42 at both ends of the anode.

[0060] Exemplarily, the first anode hook portion 11 a and the second anode hook portion 12 a are both flat sheet-shaped hooks, which are conducive to more stable connection and increased conductive area.

[0061] In one embodiment, see Figure 3 The flat sheet hook is mainly formed by welding the upper end of the first support rod 11 or the second support rod 12 with an additional flat sheet. The lower end of the additional flat sheet has an outward bending portion to more conveniently realize the installation of the anode hook and the anode.

[0062] In one embodiment, the first and second support rods 11, 12 of the main frame 100 further include first and second bent portions 11b, 12b, respectively, in the sections above the crossbeam 13. The introduction of these bent portions can better balance the portion of the fixture that deviates from its center of gravity, improving the stability of the entire fixture during the electrolysis process and enhancing electrolysis uniformity.

[0063] Preferably, the H-shaped main frame 100, bracket 200 and blade positioning assembly 300 are made of titanium alloy or copper. The anode fixture made of the above materials has better corrosion resistance and conductivity, which is beneficial to improving the service life of the fixture and ensuring the current stability and electrolysis uniformity of the electrolysis process.

[0064] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. An anode fixture for electrolytic corrosion of turbine guide blade castings, characterized in that: The anode fixture comprises: an H-shaped main support (100), a bracket (200) and a blade positioning assembly (300); wherein the main support (100) is mainly composed of support rods on both sides, namely a first support rod (11) and a second support rod (12), and a crossbeam (13) connecting the support rods on both sides; the lower ends of the support rods on both sides are connected through the bracket (200), and the upper ends of the first support rod (11) and the second support rod (12) respectively include a first anode hook portion (11a) and a second anode hook portion (12a); an accommodating space for the guide blades is formed between the crossbeam (13) and the bracket (200); There are one or more blade positioning assemblies (300), and each blade positioning assembly (300) mainly consists of a fixed portion (31) arranged on the crossbeam (13) and a movable portion (32) threadedly connected to the fixed portion (31), and the lower end of the movable portion (32) is used to abut against the residual portion of the upper edge plate of the guide blade.

2. The anode fixture according to claim 1, characterized in that: The bracket (200) is mainly composed of a rectangular outer frame (21) and a plurality of metal strips (22) arranged in parallel between two long sides of the rectangular outer frame (21).

3. The anode fixture according to claim 2, characterized in that: Each of the metal strips (22) has a hole structure extending through the thickness direction.

4. The anode fixture according to claim 2, characterized in that: The number N of the plurality of metal strips (22) satisfies: N≥M+1, where M is the number of guide blades to be electrolytically corroded; and / or, The spacing S1 between any two adjacent metal strips (22) satisfies: S1≥W1, where W1 is the width of the lower edge plate of the guide blade to be electrolytically corroded located between the two adjacent metal strips.

5. The anode fixture according to claim 1, characterized in that: The spacing S2 between any two adjacent moving parts (32) satisfies: S2≥W2+30mm, where W2 is the sum of the widths of the upper edge plates of the guide blades to be electrolytically corroded located between the two adjacent moving parts.

6. The anode fixture according to claim 1, characterized in that: The fixing portion (31) is a nut, the moving portion (32) is a bolt rod, and the head of the bolt rod includes a handle.

7. The anode fixture according to claim 1, characterized in that: The vertical distance h between the lower edge of the crossbeam (13) and the upper edge of the bracket (200) satisfies: h≥H+50mm, where H is the maximum value of the total height of a single guide blade to be electrolytically corroded.

8. The anode fixture according to claim 1, characterized in that: The sections of the first support rod (11) and the second support rod (12) located above the crossbeam (13) further include a first bending portion (11b) and a second bending portion (12b), respectively; and / or, The H-shaped main body support (100), bracket (200) and blade positioning assembly (300) are made of titanium alloy or copper material.

9. The anode fixture according to claim 1, characterized in that: The lower end of the moving portion (32) is also provided with an enlarged end portion, and the contact surface between the enlarged end portion and the upper edge plate of the guide blade is designed in accordance with the shape.

10. The anode fixture according to claim 2, characterized in that: The connection modes of the plurality of metal strips (22) and the rectangular outer frame (21) include fixed connection, detachable connection, and sliding connection.

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