Cathode wire, cylindrical electric field and installation method

Abstract

The invention discloses a cathode wire, a cylindrical electric field and an installation method, and the cathode wire comprises a spring section, a linear section and a clamping section which are connected in sequence, and the spring section, the linear section and the clamping section are of an integrated structure. The linear section penetrates through the spring section, and the top of the linear section is fixedly connected with the top of the spring section; the spring section is used for being mounted on one side of the cathode frame; the clamping section is used for being installed on the other side of the cathode frame. According to the cathode wire, the cylindrical electric field and the installation method, the spring section, the linear section and the clamping section of the cathode wire are of an integrally-formed structure, installation accessories do not need to be additionally arranged, the installation process is greatly simplified, the clamping section and the spring section are both hidden in the cathode frame after installation is completed, only the linear section is exposed in the anode cylinder, and the installation efficiency is improved. The two ends, with complex structures, of the cathode wire can be prevented from making direct contact with lampblack, oil contamination adhesion is reduced, and the discharge effect of the cathode wire in long-term use and the purification effect of a cylindrical electric field are ensured.

Description

Technical Field

[0001] This invention relates to the field of flue gas purification equipment technology, and in particular to a cathode wire, a cylindrical electric field, and an installation method. Background Technology

[0002] In the field of electrostatic oil fume purification equipment, the cylindrical electric field is mainly composed of the shell, anode cylinder, cathode components and high voltage power supply. It constructs a non-uniform electric field through these components to ultimately complete the oil fume purification process.

[0003] Traditional cylindrical electric fields use spiked cathode needles as the cathode component. These needles have multiple spikes along their length on their metal surface. During operation, the cathode needle is connected to a high-voltage power supply, and the discharge effect of the spikes creates a high-intensity, non-uniform electric field between the cathode needle and the anode cylinder. However, after prolonged use, the spikes easily accumulate oil fumes, grease, and flocculent impurities (often referred to as "hair buildup" in the industry), which are difficult to clean. As impurities accumulate, the discharge effect of the spikes weakens, leading to a decrease in electric field strength. This, in turn, affects the charging efficiency of airborne particles, ultimately significantly reducing the equipment's purification capacity.

[0004] To address these shortcomings, some cylindrical electric fields use a smooth-surfaced cathode wire instead of traditional cathode components. The smooth surface of the cathode wire reduces the accumulation of oil and dirt, minimizing the impact of impurities on the electric field. Furthermore, it ensures more uniform discharge along its length, maintaining electric field stability and extending the effective operating cycle. However, the cathode wire requires additional connecting fittings to be fixed to the cathode frame, making installation complex. These fittings are typically exposed and prone to accumulating oil and grease, affecting the electrical connection between the cathode wire and the cathode frame and posing a potential risk of electric field instability.

[0005] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a cathode wire, a cylindrical electric field and an installation method, which aims to solve the technical problems in the prior art where the cathode wire requires additional connecting accessories, resulting in complicated installation and the exposed connecting accessories are prone to oil and dirt accumulation.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A cathode wire includes a spring segment, a straight segment, and a snap-fit ​​segment connected in sequence, wherein the spring segment, the straight segment, and the snap-fit ​​segment are integrally formed; the straight segment passes through the spring segment, and the top of the straight segment is fixedly connected to the top of the spring segment; the spring segment is used to be installed on one side of the cathode frame; the snap-fit ​​segment is used to be installed on the other side of the cathode frame.

[0008] Furthermore, the outer diameter of the spring segment gradually increases in the direction toward the snap-fit ​​segment.

[0009] Furthermore, the snap-fit ​​segment includes a first broken line segment and a second broken line segment, which are spliced ​​together to form a V-shaped structure. The first broken line segment is connected to the end of the straight line segment, and the second broken line segment intersects the straight line segment at opposite angles.

[0010] Furthermore, the middle of the second broken line segment is positioned close to the straight line segment.

[0011] Furthermore, on the horizontal projection plane, the second broken line segment and the straight line segment form an angle, which faces the first broken line segment, and the angle of the angle is less than 90°.

[0012] A cylindrical electric field includes: a shell, an anode cylinder, a cathode frame, and a plurality of cathode wires; the plurality of anode cylinders are mounted on the shell, the cathode frame includes a first frame and a second frame, the first frame and the second frame are respectively insulatedly mounted on opposite sides of the shell, each cathode wire passes through an anode cylinder, and the spring section of the cathode wire is located in the first frame, and its snap-fit ​​section is located in the second frame.

[0013] Furthermore, the first frame includes a plurality of first square tubes, with a first through hole for the spring section to pass through on the side of the first square tube away from the second frame, and a waist hole for the locking section to pass through on the side of the first square tube closer to the second frame.

[0014] Furthermore, the second frame includes several second square tubes, with a second through hole on the side of the second square tube near the anode cylinder, a straight section passing through the second through hole, and a snap-fit ​​section abutting against the inner wall of the second square tube.

[0015] Furthermore, the second frame is located on the windward side of the shell.

[0016] An installation method is applied to the aforementioned cylindrical electric field; the installation method includes: The first frame and the second frame are sequentially and insulatedly fixed to opposite sides of the shell; Along the direction from the first frame to the second frame, the clamping sections of the cathode wires are passed through the first frame one by one, and the straight section of each cathode wire is correspondingly inserted into an anode cylinder; By inserting bent pliers between the first frame and the housing, each straight segment of the cathode wire is clamped in turn and pulled toward the second frame, so that the clamping segment of the cathode wire gradually approaches and is clamped into the second frame.

[0017] Beneficial effects: This invention provides a cathode wire, a cylindrical electric field, and an installation method. The spring section, straight section, and snap-fit ​​section of the cathode wire are integrally molded, eliminating the need for additional installation accessories, significantly simplifying the installation process, and reducing assembly difficulty and labor costs. During installation, the spring section is initially compressed under tension, and after installation, it extends slightly due to the disappearance of tension. This ensures that the snap-fit ​​section maintains continuous contact with the other side of the cathode frame, while keeping the straight section taut. This guarantees that the cathode wire will not shift or loosen during operation, ensuring a stable electric field distance between it and the anode cylinder. Furthermore, after installation, the snap-fit ​​section and spring section are hidden inside the cathode frame, with only the straight section exposed inside the anode cylinder to form the electric field. This avoids direct contact between the complex ends of the cathode wire and oil fumes, effectively reducing oil adhesion to these areas and ensuring the discharge effect of the cathode wire during long-term use, as well as the purification effect of the cylindrical electric field. Attached Figure Description

[0018] Figure 1 A structural diagram of the cathode wire provided by the present invention; Figure 2 This is a schematic diagram of the cathode wire installation provided by the present invention; Figure 3 This is a schematic diagram of the installation of the spring section in the cathode wire provided by the present invention; Figure 4 This is a schematic diagram of the installation of the snap-fit ​​section in the cathode wire provided by the present invention; Figure 5 A side view of the cylindrical electric field provided by the present invention; Figure 6 Front view of the cylindrical electric field provided by the present invention on the windward side; Figure 7 A logic flowchart of the installation method provided by the present invention.

[0019] Reference numerals: cathode wire 1, spring segment 11, straight segment 12, snap-fit ​​segment 13, first broken line segment 131, second broken line segment 132, included angle 133; 2. Shell, 3. Anode cylinder, 4. Cathode frame, 41. First frame, 411. First square tube, 412. First through hole, 413. Second frame, 42. Second square tube, 421. Second through hole, 422. Insulator, 5. Detailed Implementation

[0020] This invention provides a cathode wire, a cylindrical electric field, and an installation method. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0021] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0022] Please see Figures 1 to 4 As shown, the present invention provides a cathode wire 1, comprising a spring segment 11, a straight segment 12, and a snap-fit ​​segment 13 connected in sequence, wherein the spring segment 11, the straight segment 12, and the snap-fit ​​segment 13 are integrally formed; the straight segment 12 passes through the spring segment 11, and the top of the straight segment 12 is fixedly connected to the top of the spring segment 11; the spring segment 11 is used to be installed on one side of the cathode frame 4; the snap-fit ​​segment 13 is used to be installed on the other side of the cathode frame 4.

[0023] During installation, first, the snap-fit ​​section 13 of the cathode wire 1 is passed through one side of the cathode frame 4. After the snap-fit ​​section 13 and the straight section 12 of the cathode wire 1 pass through that side of the cathode frame 4 in sequence, its spring section 11 abuts against that side of the cathode frame 4. Then, the cathode wire 1 is pulled further, causing the spring section 11 to be compressed under tension, while the snap-fit ​​section 13 is snapped onto the other side of the cathode frame 4, thus completing the installation of the cathode wire 1. After installation, the spring section 11 extends a short distance due to the disappearance of tension, keeping the snap-fit ​​section 13 abutting against the other side of the cathode frame 4, while keeping the straight section 12 taut at all times. This ensures that the cathode wire 1 as a whole will not shift or loosen during operation, and guarantees a stable electric field distance between it and the anode cylinder 3.

[0024] The spring section 11, straight section 12, and snap-fit ​​section 13 of the cathode wire 1 adopt an integrated molding structure, eliminating the need for additional installation accessories. This greatly simplifies the installation process, reduces assembly difficulty and labor costs, and solves the problem of complex installation caused by the reliance on additional accessories in existing cathode wires 1. In addition, after installation, the snap-fit ​​section 13 and the spring section 11 are both hidden inside the cathode frame 4, with only the straight section 12 exposed inside the anode cylinder 3 to form an electric field. This avoids the two ends of the complex cathode wire 1 (i.e., the snap-fit ​​section 13 and the spring section 11) from directly contacting the oil fumes, effectively reducing the adhesion of oil stains in these parts. This reduces the difficulty of cleaning and maintenance, and also prevents the connection stability between the cathode wire 1 and the cathode frame 4 from being affected by oil stains, ensuring discharge efficiency and purification effect during long-term use.

[0025] In the above, the cathode wire 1 can be made of conductive materials such as stainless steel wire, copper wire, tungsten wire, and carbon fiber.

[0026] In a preferred embodiment, see [reference] Figure 1 , 3 The outer diameter of the spring segment 11 gradually increases towards the snap-fit ​​segment 13, meaning that the section of the spring segment 11 closer to the snap-fit ​​segment 13 forms a larger diameter section, while the outer diameter gradually decreases at the end farther from the snap-fit ​​segment 13, forming a gradually decreasing spiral structure. This design increases the contact area between the larger diameter section of the spring segment 11 and the inner wall of the cathode holder 4, ensuring stable installation of the spring segment 11 and preventing positional displacement of the cathode wire 1. Since the top of the spring segment 11 is fixedly connected to the top of the straight segment 12, the outwardly tapering spiral structure forms a uniform support space around the straight segment 12, ensuring that the straight segment 12 remains at the center of the spring segment 11's axis. This further guarantees the concentricity of the straight segment 12 as the main discharge area with the anode cylinder 3, reducing uneven partial discharge intensity and improving particle charging efficiency.

[0027] Preferably, the large-diameter section of the spring segment 11 abuts against both sides of the inner wall of the cathode frame 4 to form a positional constraint, thereby further improving the installation stability of the spring segment 11.

[0028] In a preferred embodiment, see [reference] Figure 1 , 4 The snap-fit ​​segment 13 includes a first zigzag segment 131 and a second zigzag segment 132, which are joined to form a V-shaped structure. The first zigzag segment 131 is connected to the end of the straight segment 12, and the second zigzag segment 132 intersects the straight segment 12 at opposite angles. The V-shaped snap-fit ​​segment 13 utilizes the material and elastic deformation characteristics of the cathode wire 1 to possess elastic deformation capability. During installation, external force is used to forcefully insert the connection position of the first zigzag segment 131 and the straight segment 12 into the cathode frame 4. During this process, the first zigzag segment 131 moves closer to the straight segment 12, while the second zigzag segment 132 is abutted by the cathode frame 4 and moves away from the first zigzag segment 131, thereby enabling the snap-fit ​​segment 13 to be smoothly inserted into the cathode frame 4. After the snap-fit ​​section 13 is fully inserted into the installation position of the cathode frame 4, the external force is removed. The snap-fit ​​section 13 returns to its initial V-shaped structure due to the elastic restoring force of its own material. The second folded section 132 then tightly abuts against the inner wall of the cathode frame 4, forming an axial limit through the abutment force. The cathode wire 1 can be stably fixed without additional installation accessories, simplifying the entire installation operation and avoiding the problem of oil stains easily accumulating on exposed accessories.

[0029] Further, see Figure 1 , 4The middle part of the second broken line segment 132 is located close to the straight line segment 12. When the snap-fit ​​segment 13 recovers its deformation, both ends of the second broken line segment 132 will simultaneously contact the inner wall of the cathode frame 4 and generate abutment force. Since the middle part is close to the straight line segment 12, the distance from the force points at both ends to the axis of the straight line segment 12 is equal, which makes the snap-fit ​​segment 13 and the cathode frame 4 installed stably. Combined with the stable connection between the spring segment 11 and the cathode frame 4, the overall stability of the cathode wire 1 after installation is greatly improved, ensuring that the straight line segment 12 always remains taut during long-term use.

[0030] Furthermore, see Figure 1 , 4 On the horizontal projection plane, the second broken line segment 132 and the straight line segment 12 form an angle 133, which faces the first broken line segment 131, and the angle 133 is less than 90°. During installation, when the second broken line segment 132 is squeezed and rotated by the side wall of the cathode frame 4, the initial angle 133, which is less than 90°, will gradually decrease until it is installed in place, at which point the second broken line segment 132 and the straight line segment 12 are approximately perpendicular on the horizontal projection plane. At this time, the snap-fit ​​segment 13 has not completely returned to its initial shape, but maintains the slight deformation caused by the angle change. This slight deformation will generate continuous tension, forming a tensioning effect on the straight line segment 12 along the axial direction of the straight line segment 12. Combined with the axial tension generated by the spring segment 11 abutting against the other side of the cathode frame 4, the two ends of the cathode wire 1 are more firmly fixed in the cathode frame 4, effectively preventing the cathode wire 1 from shifting along the axial direction and radially, ensuring that the straight line segment 12 is always taut, and ensuring the coaxiality of the cathode wire 1 and the anode cylinder 3.

[0031] Please see Figure 2-6 The present invention also provides a cylindrical electric field, comprising: a shell 2, an anode cylinder 3, a cathode frame 4, and a plurality of cathode wires 1; the plurality of anode cylinders 3 are mounted on the shell 2, and the cathode frame 4 includes a first frame 41 and a second frame 42, which are respectively insulatedly mounted on opposite sides of the shell 2. Each cathode wire 1 passes through an anode cylinder 3, and the spring section 11 of the cathode wire 1 is located in the first frame 41, and its snap-fit ​​section 13 is located in the second frame 42. Specifically, the plurality of anode cylinders 3 are evenly distributed within the shell 2, and the two ends of the anode cylinders 3 are respectively connected to the corresponding sides of the shell 2. The first frame 41 and the second frame 42 are mounted on the shell 2 through insulators 5, and the first frame 41 and the second frame 42 are respectively located at the two ends of the anode cylinders 3.

[0032] By setting up a first frame 41 and a second frame 42, a sufficient number of installation positions are provided for multiple cathode wires 1, ensuring that each cathode wire 1 is correspondingly installed within an anode cylinder 3. During assembly, along the direction from the first frame 41 towards the second frame 42, the snap-fit ​​section 13 of each cathode wire 1 first passes through the first frame 41, driving the straight section 12 through the anode cylinder 3. Finally, an external force pulls the straight section 12 towards the second frame 42, causing the snap-fit ​​section 13 to snap into the second frame 42. After the external force is released, the spring section 11 of the cathode wire 1 abuts against the first frame 41, and the snap-fit ​​section 13 abuts against the second frame 42, achieving stable installation of the cathode wire 1. At the same time, it ensures the coaxiality of each cathode wire 1 with the corresponding anode cylinder 3, allowing the electric field to be uniformly covered within the anode cylinder 3, improving the particle charging effect. In addition, both the spring section 11 and the snap-fit ​​section 13 are hidden within the cathode frame 4, reducing the adhesion of oil at the component connections, reducing maintenance frequency, and further extending the stable operating life of the equipment.

[0033] In a preferred embodiment, see [reference] Figure 2 , 3 The first frame 41 includes several first square tubes 411. A first through hole 412 for the spring section 11 to pass through is opened on the side of the first square tube 411 away from the second frame 42, and a waist hole 413 for the snap-fit ​​section 13 to pass through is opened on the side of the first square tube 411 closer to the second frame 42. Four first square tubes 411 are spliced ​​together to form a rectangular frame structure, and the remaining first square tubes 411 are equally spaced within the rectangular frame. The centerline of the first through hole 412 and the centerline of the waist hole 413 are coaxial with the centerline of the anode cylinder 3, ensuring that the cathode wire 1 is coaxial with the anode cylinder 3 after installation, and ensuring that the outer periphery of the straight section 12 of the cathode wire 1 is at the same distance from the inside of the anode cylinder 3.

[0034] The first through hole 412 serves as the entry channel for the spring segment 11, allowing it to penetrate the interior of the first square tube 411. The waist hole 413 adapts to the structural form of the snap-fit ​​segment 13 and the straight segment 12, ensuring that both can pass smoothly through the first square tube 411. Furthermore, after the spring segment 11 is inserted, the inner wall of the waist hole 413 in the first square tube 411 abuts against the spring segment 11, preventing it from swaying freely within the tube. Simultaneously, the width of the waist hole 413 restricts the horizontal movement of the straight segment 12, further improving the installation stability of the spring segment 11 within the first square tube 411. These features facilitate smooth installation of the cathode wire 1 and the first frame 41, significantly enhancing the ease and stability of cathode wire 1 installation.

[0035] In a preferred embodiment, see [reference] Figure 2 , 4The second frame 42 includes several second square tubes 421. Each second square tube 421 has a second through hole 422 on the side near the anode cylinder 3. A straight section 12 passes through the second through hole 422, and a snap-fit ​​section 13 abuts against the inner wall of the second square tube 421. Four second square tubes 421 are spliced ​​to form a rectangular frame structure, and the remaining second square tubes 421 are evenly spaced within the rectangular frame. The axis of the second through hole 422 is coaxial with the axis of the anode cylinder 3, ensuring that the cathode wire 1 is coaxial with the anode cylinder 3 after installation, thereby ensuring that the outer periphery of the straight section 12 of the cathode wire 1 is at the same distance from the inside of the anode cylinder 3. Specifically, the diameter of the second through hole 422 is smaller than the length of the second broken line segment 132. During installation, the straight segment 12 of the cathode wire 1 moves along the axis of the anode cylinder 3 toward the second frame 42. The connection between the first broken segment 131 and the straight segment 12 first passes through the second through hole 422. The first broken segment 131 and the straight segment 12 are deformed by the pressure of the second through hole 422, and the second broken segment 132 is also deformed by the pressure of the second through hole 422. The included angle 133 is temporarily reduced, so that the snap-fit ​​segment 13 can smoothly pass through the second through hole 422 and enter the interior of the second square tube 421. After the snap-fit ​​segment 13 is completely inside the second square tube 421, the second broken segment 132 is freed from the pressure and returns to its initial shape. At this time, the two ends of the second broken segment 132 will be tightly abutted against the inner wall of the second square tube 421, forming a reverse limit, effectively preventing the cathode wire 1 from retreating along the axis away from the second frame 42, and realizing the reliable fixation of the snap-fit ​​segment 13 in the second square tube 421. At the same time, in conjunction with the pre-tightening force of the spring section 11 in the first frame 41, it is ensured that the straight section 12 always remains coaxial with the anode cylinder 3 and remains taut and does not loosen over a long period of time.

[0036] In a preferred embodiment, the second frame 42 is disposed on the windward side of the housing 2, and the windward side of the second frame 42 is a closed structure without any through holes; at the same time, the waist hole 413 of the first frame 41 is arranged facing the windward side, and the opening area of ​​the waist hole 413 is small. Through the above arrangement, the flue gas can be directly blocked from entering the interior of the second frame 42 from the windward side, avoiding the oil, dust and other impurities carried by the flue gas from entering the first square tube 411; and the small area of ​​the waist hole 413 can block the fine impurities in the flue gas from entering the interior of the first square tube 411 through the waist hole 413, reducing the adhesion of oil stains between the spring section 11 of the cathode wire 1 and the inner wall of the waist hole 413.

[0037] Please see Figure 7 The present invention also provides an installation method for use in the aforementioned cylindrical electric field; the installation method includes: S1. The first frame 41 and the second frame 42 are sequentially and insulatedly fixed to the opposite sides of the housing 2.

[0038] In this embodiment, the first frame 41 and the second frame 42 are sequentially mounted on both sides of the housing 2 via insulators 5, and are located at both ends of the anode cylinder 3, respectively. Meanwhile, the center lines of the first through hole 412 and the waist hole 413 on the first frame 41, and the second through hole 422 on the second frame 42, are coaxial with the corresponding axis of the anode cylinder 3.

[0039] S2. Along the direction from the first frame 41 toward the second frame 42, pass the clamping section 13 of the cathode wire 1 through the first frame 41 one by one, and the straight section 12 of the cathode wire 1 is correspondingly inserted into an anode cylinder 3.

[0040] In this embodiment, the snap-fit ​​sections 13 of multiple cathode wires 1 pass through the first through hole 412 and the waist hole 413 of the first frame 41 in sequence, and the straight section 12 of the cathode wire 1 passes through the anode cylinder 3. After the spring section 11 of the cathode wire 1 passes through the first through hole 412, it is hidden in the first square tube 411 of the first frame 41 under the restriction of the waist hole 413, so as to achieve the hidden installation of one end of the cathode wire 1.

[0041] S3. The operator uses bent pliers to reach between the second frame 42 and the housing 2, and sequentially clamps the straight section 12 of each cathode wire 1 and pulls it toward the second frame 42, so that the clamping section 13 of the cathode wire 1 gradually approaches and is clamped into the second frame 42.

[0042] In this embodiment, bent-nose pliers are used to facilitate the installation of the snap-fit ​​section 13 located between the second frame 42 and the housing 2. First, the bent-nose pliers clamp the part of the straight section 12 close to the snap-fit ​​section 13 and pull the straight section 12 toward the second frame 42. At the same time, the snap-fit ​​section 13 moves toward the second through hole 422 of the second frame 42 and deforms under the pressure of the second through hole 422. The spring section 11 is gradually compressed until the snap-fit ​​section 13 is completely inserted into the second square tube 421 of the second frame 42. After the bent-nose pliers release the straight section 12, the spring section 11 and the snap-fit ​​section 13 return to their original deformation. The second folded section 132 of the snap-fit ​​section 13 abuts against the inner wall of the second square tube 421 to achieve the hidden installation of the other end of the cathode wire 1.

[0043] As mentioned above, the bent-nose pliers are existing technology. The bent-nose pliers have a clamping part in the shape of a "7". When holding the bent-nose pliers, its clamping part can be inserted between the second frame 42 and the housing 2 to clamp the cathode wire 1.

[0044] The entire process is convenient to operate and can efficiently complete the corresponding assembly of cathode wire 1 and anode cylinder 3. The hidden installation at both ends of cathode wire 1 also prevents oil stains in the flue gas from adhering to the end structure of cathode wire 1. Furthermore, based on the compression deformation of spring section 11 and the recovery deformation characteristics of snap-fit ​​section 13, the stability of cathode wire 1 after installation is ensured, providing reliable support for the uniform discharge and efficient purification of the subsequent cylindrical electric field.

[0045] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A cathode wire, characterized in that, It includes a spring segment (11), a straight segment (12) and a snap-fit ​​segment (13) connected in sequence, and the spring segment (11), the straight segment (12) and the snap-fit ​​segment (13) are integrally formed; the straight segment (12) passes through the spring segment (11), and the top of the straight segment (12) is fixedly connected to the top of the spring segment (11); the spring segment (11) is used to be installed on one side of the cathode frame (4); the snap-fit ​​segment (13) is used to be installed on the other side of the cathode frame (4).

2. The cathode wire according to claim 1, characterized in that, The outer diameter of the spring segment (11) gradually increases in the direction of the snap-fit ​​segment (13).

3. The cathode wire according to claim 1, characterized in that, The snap-fit ​​segment (13) includes a first broken line segment (131) and a second broken line segment (132). The first broken line segment (131) and the second broken line segment (132) are spliced ​​together to form a V-shaped structure. The first broken line segment (131) is connected to the end of the straight line segment (12), and the second broken line segment (132) and the straight line segment (12) are in a state of non-plane intersection.

4. The cathode wire according to claim 3, characterized in that, The middle part of the second broken line segment (132) is set close to the straight line segment (12).

5. The cathode wire according to claim 4, characterized in that, On the horizontal projection plane, the second broken line segment (132) forms an angle (133) with the straight line segment (12), the angle (133) is directed toward the first broken line segment (131), and the angle (133) is less than 90°.

6. A cylindrical electric field, characterized in that, include: The housing (2), anode cylinder (3), cathode frame (4) and a plurality of cathode wires (1) as described in any one of claims 1-5; the plurality of anode cylinders (3) are mounted on the housing (2), the cathode frame (4) includes a first frame (41) and a second frame (42), the first frame (41) and the second frame (42) are respectively insulatedly mounted on opposite sides of the housing (2), each cathode wire (1) passes through an anode cylinder (3), and the spring section (11) of the cathode wire (1) is located in the first frame (41), and its snap-fit ​​section (13) is located in the second frame (42).

7. The cylindrical electric field according to claim 6, characterized in that, The first frame (41) includes a plurality of first square tubes (411). The first square tube (411) has a first through hole (412) for the spring section (11) to pass through on the side away from the second frame (42), and a waist hole (413) for the card section (13) to pass through on the side closer to the second frame (42).

8. The cylindrical electric field according to claim 6, characterized in that, The second frame (42) includes several second square tubes (421). A second through hole (422) is provided on the side of the second square tube (421) near the anode cylinder (3). A straight section (12) passes through the second through hole (422), and a snap-fit ​​section (13) abuts against the inner wall of the second square tube (421).

9. The cylindrical electric field according to claim 8, characterized in that, The second frame (42) is located on the windward side of the shell (2).

10. An installation method, characterized in that, Applied to the cylindrical electric field as described in claim 6; the installation method includes: The first frame (41) and the second frame (42) are sequentially and insulatedly fixed to the opposite sides of the housing (2); Along the direction from the first frame (41) toward the second frame (42), the snap-fit ​​section (13) of the cathode wire (1) is passed through the first frame (41) one by one, and the straight section (12) of a cathode wire (1) is correspondingly inserted into an anode cylinder (3); By inserting bent pliers between the second frame (42) and the housing (2), the straight section (12) of each cathode wire (1) is clamped in sequence and pulled toward the second frame (42) so that the clamping section (13) of the cathode wire (1) gradually approaches and is clamped into the second frame (42).

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