An arc-shaped clamp for an electrolytic cell
By adding a large-area contact plate and an anti-detachment design to the electrolytic cell fixture, the problems of conductor damage and bolt detachment are solved, enabling safe and efficient electrolytic aluminum production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN WENSHAN ALUMINUM CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-07-31
AI Technical Summary
Existing electrolytic cell fixtures are prone to conductor damage, poor contact, and bolt loosening during the high-current roasting start-up phase, affecting production safety and efficiency.
Design an arc-shaped clamp with large-area first and second contact plates to evenly distribute clamping force and prevent bolts from falling off. Use stainless steel material and anti-slip texture to ensure flat contact surfaces and prevent damage.
It effectively protects conductors, reduces contact resistance, prevents electrical arcing, improves ease of operation and work efficiency, and ensures production safety.
Smart Images
Figure CN224578365U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrolytic cell technology, and in particular to an arc-shaped clamp for use in electrolytic cells. Specifically, it is a highly reliable, damage-resistant arc-shaped clamp particularly suitable for use in the electrolytic aluminum production process, during the start-up phase of the electrolytic cell roasting stage, for fixing electrical conductors such as high-current flexible connections and shunts. Background Technology
[0002] In the production process of large-scale prebaked alumina electrolytic cells, new or overhauled electrolytic cells require a critical coke granule roasting start-up stage before formal commissioning. The purpose of this stage is to preheat the refractory materials within the cell and sinter the gaps between the cathode carbon blocks, forming a robust whole. To achieve this, numerous temporary electrical circuits, such as flexible conductor connections and shunts, need to be connected to the electrolytic cell system to generate Joule heating through high current.
[0003] When installing and removing these temporary flexible connections and shunts, a bow-shaped clamp (also known as a C-clamp or G-clamp) is commonly used for securing them. This clamp typically consists of a C-shaped bow frame and a bolt passing through one end of the frame. By tightening the bolt, its end and the other end of the frame clamp the conductor to be connected, such as an aluminum busbar or copper strip.
[0004] However, in practical use, this traditional bow-shaped clamp has revealed a series of serious defects: For example, the contact area between the lower clamping arm end face and the bolt end of the traditional bow-shaped clamp is very small, generating extremely high local pressure when sufficient clamping force is applied. Since conductors such as aluminum busbars are relatively soft, this concentrated stress easily causes mechanical damage such as indentations and scratches on the conductor surface, affecting its electrical performance and service life. Due to the small contact area, the clamp is prone to slippage or deflection during tightening due to uneven force, resulting in insufficient clamping force or tiny gaps between the contact surfaces. When a large current passes through, these poor contact points will generate excessively high contact resistance, causing local overheating or even arcing, posing a serious threat to production safety. On the other hand, when releasing the clamp in existing technology, if the operating force is not properly controlled, the bolt can easily be completely unscrewed from the threaded hole of the clamp body and fall off. In complex industrial environments, fallen bolts are difficult to find, resulting in lost parts, delaying installation or disassembly time, and reducing work efficiency.
[0005] In view of the above problems, there is an urgent need for an improved special fixture that can overcome the above defects in order to meet the requirements of safety, efficiency and high reliability in the electrolytic aluminum production site. Utility Model Content
[0006] In view of this, this application provides an arc-shaped clamp for an electrolytic cell. The main purpose is to solve the technical problems of small pressing area, uneven pressure, easy slippage, easy damage to the clamped parts, and easy bolt detachment or loss in the prior art.
[0007] According to a first aspect of the present invention, an arc-shaped clamp for an electrolytic cell is provided, comprising: an arc-shaped clamp body having a lower clamping arm and an upper part, the upper part having a threaded hole; a bolt threaded into the threaded hole, the bolt having an end; a first contact plate fixedly connected to the inner side of the lower clamping arm for contacting a clamped part; and a second contact plate connected to the end of the bolt for contacting the clamped part; wherein the contact area of the first contact plate and the second contact plate is greater than the cross-sectional area of the end face of the lower clamping arm or the end of the bolt.
[0008] As a further optimization of this utility model, the second contact plate is rotatably connected to the end of the bolt about the axis of the bolt. This structure in this application allows the second contact plate to stop rotating after contacting the surface of the clamped part when the bolt is tightened, with only the bolt itself rotating. This avoids torsional and scratch damage to the surface of the clamped part, and also better adapts to uneven contact surfaces, ensuring a tighter fit.
[0009] As a further optimization of this utility model, the maximum external dimension of the second contact plate is larger than the inner diameter of the threaded hole, and the second contact plate is configured to limit the bolt when the bolt is unscrewed from the threaded hole, thereby preventing it from falling off the bow-shaped clamp. This ingenious design structurally eliminates the possibility of the bolt accidentally falling off and being lost, greatly improving the convenience and reliability of operation.
[0010] As a further optimization of this utility model, the first contact plate is welded to or integrally formed with the lower clamping arm. This application adopts a firm and reliable connection method, which can ensure that the first contact plate will not loosen or fall off when subjected to huge pressure.
[0011] As a further optimization of this utility model, both the first contact plate and the second contact plate are made of stainless steel. Stainless steel has good strength, hardness and corrosion resistance, which can ensure that the contact plate itself is not easily deformed or damaged.
[0012] As a further optimization of this utility model, the contact surfaces of the first contact plate and the second contact plate facing the clamped part are both planar, so as to provide the maximum contact area and the most uniform pressure distribution.
[0013] As a further optimization of this utility model, the surface of the second contact plate facing the clamped member is provided with anti-slip texture.
[0014] As a further optimization of this utility model, the edges of the contact surfaces of the first contact plate and the second contact plate facing the clamped part are both provided with chamfers.
[0015] As a further optimization of this utility model, the lower clamping arm is provided with a positioning hole, which is used to cooperate with the positioning pin on the clamped part.
[0016] As a further optimization of this utility model, a buckle is provided between the end of the second contact plate and the bolt to maintain the rotatable connection between the second contact plate and the bolt.
[0017] Beneficial effects
[0018] This utility model provides an arc-shaped clamp for an electrolytic cell. By adding a large-area first contact plate and a second contact plate at the two pressing points of the clamp, the concentrated clamping force is evenly distributed over a wider area, significantly reducing the pressure acting on the conductor surface, effectively protecting the conductor and preventing damage. The increased contact area ensures more comprehensive and tighter physical contact between the clamp and the conductor, eliminating gaps caused by uneven pressure, significantly reducing contact resistance, fundamentally preventing electrical arcing, and ensuring production safety. Furthermore, the unique anti-loosening design ensures that the bolt remains firmly on the clamp, completely solving the problem of bolt loss during on-site operation, reducing the time spent searching for and replacing parts, and significantly improving the efficiency of installation and disassembly.
[0019] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description
[0020] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.
[0021] In the attached diagram:
[0022] Figure 1 This diagram illustrates the structure of an arc-shaped clamp for an electrolytic cell according to an embodiment of the present invention.
[0023] Figure 2This illustration shows a schematic diagram of another angle of the bow-shaped clamp for an electrolytic cell provided by an embodiment of the present invention.
[0024] Icon labels:
[0025] 1-Arch-shaped clamp body, 11-Lower clamp arm, 12-Upper part, 2-Bolt, 21-End, 3-Second contact plate, 4-First contact plate.
[0026] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.
[0028] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] Example
[0031] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.
[0032] like Figure 1-2 As shown, this embodiment of the utility model provides a damage-prevention bow-shaped clamp. The clamp mainly includes a bow-shaped clamp body 1, a bolt 2, a first contact plate 4 fixed on the bow-shaped clamp body 1, and a second contact plate 3 installed at the end of the bolt 2.
[0033] In one feasible implementation, such as Figure 1As shown, the bow-shaped clamp 1 is C-shaped or bow-shaped and made of high-strength metal (such as cast steel) to withstand enormous tension. The bow-shaped clamp is integrally formed and includes a lower clamping arm 11 and an opposing upper part 12. A through threaded hole is machined on the upper part 12.
[0034] In this embodiment, the bolt 2 is a metal rod with a standard external thread, the thread of which mates with the threaded hole on the upper part 12 of the bow-shaped clamp body 1. The bolt 2 has an end 21, which can be rotated to move axially within the threaded hole, thereby adjusting the distance between the end 21 and the lower clamping arm 11 to achieve the function of clamping or loosening.
[0035] One of the core improvements of this utility model lies in the arrangement of the first contact plate 4. For example... Figure 2 As shown, a first contact plate 4 is fixedly connected to the inner surface of the lower clamping arm 11 of the bow-shaped clamping body 1 facing the clamping space. In this embodiment, the first contact plate 4 is a stainless steel plate with a flat contact surface, and its area is significantly larger than the end face of the original lower clamping arm 11. The first contact plate 4 is welded to or integrally formed with the lower clamping arm 11 to form a stable, large-area fixed contact surface. In addition, the lower clamping arm 11 is provided with a positioning hole, which is used to cooperate with the positioning pin on the clamped part.
[0036] Another core improvement of this utility model lies in the setting of the second contact plate 3, which is connected to the end 21 of the bolt 2 and can be rotatably connected around the axis of the bolt 2. The second contact plate 3 is used to contact the clamped part. The second contact plate 3 acts as a movable pressure foot at the end 21 of the bolt 2. In this embodiment, the second contact plate 3 is also a stainless steel disc with a flat contact surface. Its connection with the end 21 of the bolt 2 is a rotatable connection. Specifically, for example, the end of the bolt may be provided with a ball head, and the second contact plate 3 may be provided with a corresponding ball socket. The two are connected by riveting or snap-fitting to form a freely rotatable ball joint connection, or the two are connected by a bolt and thread engagement. This design allows the second contact plate 3 to adaptively level itself and stop rotating after contacting the clamped object when the bolt 2 is tightened, so that only the bolt 2 continues to be screwed in, thereby avoiding torsional force on the surface of the clamped object.
[0037] In this embodiment, the diameter or maximum external dimension of the second contact plate 3 is designed to be larger than the inner diameter of the threaded hole in the upper part 12 of the bow-shaped clamp 1, and the second contact plate 3 acts as a limit for the bolt 2 when it is unscrewed from the threaded hole. During assembly, the bolt 2 is first passed through the threaded hole, and then its end 21 is connected to the second contact plate 3. In this way, when the bolt 2 is rotated in the opposite direction to loosen it, the larger second contact plate 3 will be blocked by the edge of the threaded hole and cannot pass through, thereby effectively preventing the bolt 2 from being completely unscrewed from the bow-shaped clamp 1 and falling off.
[0038] When using the clamp of this utility model, the conductor, such as the aluminum busbar, to be fixed is placed between the first contact plate 4 and the second contact plate 3, and then the bolt 2 is rotated. The second contact plate 3 moves downward until it contacts the conductor. Because both the first contact plate 4 and the second contact plate 3 have large, flat contact surfaces, the clamping force is evenly distributed on the conductor surface, ensuring a firm clamping without causing damage. The entire process is stable, efficient, and safe. In this embodiment, the surface of the second contact plate 3 facing the clamped part is provided with anti-slip texture.
[0039] In one feasible implementation, the edges of the contact surfaces of the first contact plate 4 and the second contact plate 3 facing the clamped part are both provided with chamfers.
[0040] In one feasible embodiment, a snap fastener is provided between the second contact plate 3 and the end 21 of the bolt 2 to maintain the second contact plate 3 and the bolt 2 in a rotatable connection.
[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. An arc-shaped clamp for an electrolytic cell, characterized in that, include: The bow-shaped clamp body (1) has a lower clamping arm (11) and an upper part (12), and the upper part (12) is provided with a threaded hole; Bolt (2), which is threaded into the threaded hole, the bolt (2) having an end (21); The first contact plate (4) is fixedly connected to the inner side of the lower clamping arm (11) and is used to contact the clamped part; And a second contact plate (3), connected to the end (21) of the bolt (2), for contacting the clamped part; The contact areas of the first contact plate (4) and the second contact plate (3) are both greater than the cross-sectional area of the end face of the lower clamping arm (11) or the end (21) of the bolt (2).
2. The bow-shaped clamp according to claim 1, characterized in that: The second contact plate (3) is rotatably connected to the end (21) of the bolt (2) about the axis of the bolt (2).
3. The bow-shaped clamp according to claim 1 or 2, characterized in that: The maximum external dimension of the second contact plate (3) is greater than the inner diameter of the threaded hole, and the second contact plate (3) limits the bolt (2) when the bolt (2) is screwed out of the threaded hole.
4. The bow-shaped clamp according to claim 1, characterized in that: The first contact plate (4) is welded to or integrally formed with the lower clamping arm (11).
5. The bow-shaped clamp according to claim 4, characterized in that: Both the first contact plate (4) and the second contact plate (3) are made of stainless steel.
6. The bow-shaped clamp according to claim 5, characterized in that: The contact surfaces of the first contact plate (4) and the second contact plate (3) facing the clamped part are both planes.
7. The bow-shaped clamp according to claim 6, characterized in that: The surface of the second contact plate (3) facing the clamped member is provided with anti-slip texture.
8. The bow-shaped clamp according to claim 7, characterized in that: The edges of the contact surfaces of the first contact plate (4) and the second contact plate (3) facing the clamped part are both chamfered.
9. The bow-shaped clamp according to claim 1, characterized in that: The lower clamping arm (11) is provided with a positioning hole, which is used to cooperate with the positioning pin on the clamped part.
10. The bow-shaped clamp according to claim 2, characterized in that: A buckle is provided between the second contact plate (3) and the end (21) of the bolt (2) to maintain the second contact plate (3) and the bolt (2) in a rotatable connection.