A damping type air suction hood for rare earth electrolytic furnace

Abstract

The utility model discloses a kind of damping type air suction hoods for rare earth electrolytic furnace, including fixed base and two cover shell assemblies, two cover shell assemblies are rotatably connected on fixed base by pivot, cover shell assembly includes cover plate and connecting arm, two cover plates are oppositely arranged and mutually buckled to form suction passage, pivot is fixedly connected on fixed base or connecting arm, and damping structure is equipped between pivot and corresponding connecting arm or fixed base, when two cover shell assemblies are relatively opened, damping structure is used to drive cover shell assembly to keep in corresponding opening position. With the effect that cover shell assembly can hover at any angle, cover shell assembly is positioned firmly, and the security of tungsten rod movement is improved.

Description

Technical Field

[0001] This utility model relates to the field of rare earth electrolysis furnace exhaust gas collection technology, and in particular to a damping suction hood for rare earth electrolysis furnaces. Background Technology

[0002] A Chinese patent with publication number CN207143352U discloses a molten salt electrolysis waste gas collection device, including an electrolysis furnace platform. The center of the electrolysis furnace platform is a furnace opening, which is covered by a lower cover. An upper cap is provided on the lower cover. The front of the lower cover has an opening and includes two oppositely arranged arc-shaped plates. The outer wall of the arc-shaped plate is connected to one end of a cover support arm, and the other end of the cover support arm is sleeved on a cover positioning shaft through a bushing I. The upper cap is composed of two symmetrically arranged arc-shaped cover plates. The outer wall of the arc-shaped cover plate is connected to one end of a cap support arm, and the other end of the cap support arm is sleeved on a cap positioning shaft through a bushing II.

[0003] However, the aforementioned molten salt electrolysis waste gas collection device has the following drawbacks: The waste gas collection device includes two symmetrically arranged arc-shaped covers. During use, the two arc-shaped covers need to be joined together to extract the exhaust gas. This type of molten salt electrolysis furnace usually uses tungsten rods as heating elements, using electrical energy to heat and convert it into chemical energy to melt certain metal salts and use them as electrolytes for electrolysis to extract and purify metals. Usually, the tungsten rods are placed directly below the waste gas collection device. When replacing the tungsten rods, the arc-shaped covers on both sides need to be opened relative to each other. However, due to the lack of a positioning structure between the cap support arm and the cap positioning shaft of the arc-shaped covers, the relatively open arc-shaped covers are prone to closing due to external factors such as horizontality and airflow, causing inconvenience in the process of removing the tungsten rods. This needs to be improved. Utility Model Content

[0004] The purpose of this invention is to provide a damping suction hood for rare earth electrolysis furnaces, which has the effect of allowing the hood assembly to be suspended at any angle and the hood assembly to be firmly positioned, thereby improving the safety of tungsten rod movement.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a damping suction hood for a rare earth electrolysis furnace, comprising a fixed base and two hood assemblies, the two hood assemblies being rotatably connected to the fixed base via a rotating shaft, each hood assembly comprising a cover plate and a connecting arm, the two cover plates being arranged opposite to each other and interlocking to form an air extraction channel, the rotating shaft being fixedly connected to the fixed base or the connecting arm, and a damping structure being provided between the rotating shaft and the corresponding connecting arm or fixed base, the damping structure being used to drive the hood assembly to remain in the corresponding open position when the two hood assemblies are opened relative to each other.

[0006] By adopting the above technical solution, the cover assemblies on both sides close together to form an exhaust channel during use. The exhaust gas generated by the electrolytic furnace is extracted through the exhaust channel. The damping structure can improve the stability of the fit between the cover plates on both sides. When it is necessary to move the tungsten rod, the cover plates on both sides are opened to separate them. At this time, the damping structure can keep the corresponding cover assembly in the open position, preventing the cover assembly from accidentally closing when the tungsten rod is moved. This improves the smoothness and safety of the tungsten rod movement. It has the effect that the cover assembly can be suspended at any angle and the cover assembly is firmly positioned, thereby improving the safety of the tungsten rod movement.

[0007] A further feature of this invention is that one end of the rotating shaft is fixedly connected to the fixed base, the damping structure includes an elastic element, a damping sleeve, and a locking element, the damping sleeve is slidably sleeved on the rotating shaft, and the damping sleeve and the rotating shaft are anti-rotationally engaged by an anti-rotation structure, the connecting arm is provided with a rotating hole corresponding to the rotating shaft, one end of the connecting arm is rotatably connected to the outside of the rotating shaft through the rotating hole, the elastic element drives the damping sleeve to press against the connecting arm and engage with it in a damping manner, and the locking element is locked onto the rotating shaft and engages with the connecting arm to prevent it from detaching.

[0008] By adopting the above technical solution, the damping sleeve is elastically pressed against the connecting arm by the elastic force of the elastic element. When the cover plate rotates, it drives the connecting arm to rotate synchronously. When the connecting arm rotates to a predetermined angle, the static friction between the damping sleeve and the connecting arm can be used to achieve the suspension of the connecting arm at any rotation angle.

[0009] A further feature of this invention is that at least two damping sleeves are provided, with at least one damping sleeve provided between the connecting arm and the elastic member, and at least one damping sleeve provided between the connecting arm and the locking member.

[0010] By adopting the above technical solution and through the damping cooperation of multiple damping sleeves, double-sided positioning of the upper and lower ends of the connecting arm can be achieved, thereby improving the positioning capability of the connecting arm.

[0011] A further feature of this invention is that the elastic element is a butterfly spring, which elastically abuts against the fixed base and the corresponding damping sleeve.

[0012] By adopting the above technical solution, the disc spring has a high load capacity and good buffering performance, while saving space, making the structure of this utility model more compact.

[0013] A further feature of this invention is that the locking element is a locking nut, and the locking nut is threadedly connected to the rotating shaft.

[0014] By adopting the above technical solution, the operator can adjust the elastic force of the elastic element by turning the locking nut in the forward or reverse direction, thereby adjusting the frictional resistance between the damping sleeve and the connecting arm.

[0015] A further feature of this invention is that the anti-rotation structure includes a snap-fit ​​surface and a locking part. The snap-fit ​​surface is located on the side wall of the rotating shaft, and the locking part is located on the inner wall of the damping sleeve. The snap-fit ​​surface and the locking part are mutually snapped together and anti-rotation are prevented.

[0016] By adopting the above technical solution, the locking and positioning of the snap-fit ​​surface and the snap-fit ​​part makes the damping sleeve anti-rotation sleeve more stable on the rotating shaft, effectively preventing the damping sleeve from rotating relative to the rotating shaft.

[0017] A further feature of this invention is that the connecting arm is fixedly provided with a rotating cylinder portion corresponding to the rotating shaft, the rotating hole is opened on the rotating cylinder portion, and the end of the rotating cylinder portion facing the damping sleeve is provided with a friction-fitting protrusion, and the rotating cylinder portion is damped in conjunction with the damping sleeve through the friction-fitting protrusion.

[0018] A further feature of this invention is that the damping sleeve and / or the rotating drum are made of a wear-resistant material.

[0019] By adopting the above technical solution, the wear resistance of the friction component of this utility model can be improved, thereby extending the service life of the friction component of this utility model.

[0020] A further feature of this invention is that the friction contact surface between the damping sleeve and the friction-fitting protrusion is set as a plane.

[0021] By adopting the above technical solution, the frictional contact area of ​​the plane is larger, which is beneficial to improving the frictional resistance of this utility model.

[0022] A further feature of this invention is that the connecting arm is a hollow structure.

[0023] By adopting the above technical solution, the overall weight of the connecting arm is reduced, thus decreasing the possibility of the connecting arm rotating due to its own excessive weight.

[0024] In summary, this utility model has the following beneficial effects:

[0025] Two cover assemblies are rotatably connected on a fixed base via a rotating shaft. Each cover assembly includes a cover plate and a connecting arm. The connecting arm has a rotating hole corresponding to the rotating shaft. One end of the rotating shaft is fixedly connected to the fixed plate, and a damping structure is provided between the rotating shaft and the connecting arm. In use, the cover assemblies on both sides close together to form an exhaust channel. The exhaust gas generated by the electrolytic furnace is extracted through the exhaust channel. The damping structure can improve the stability of the cover plates on both sides when they are in contact. When the tungsten rod needs to be moved, the cover plates on both sides are opened to separate them. At this time, the damping structure can keep the corresponding cover assembly in the open position, preventing the cover assembly from accidentally closing when the tungsten rod is moved. This improves the smoothness and safety of the tungsten rod movement. The cover assembly can be suspended at any angle, and the cover assembly is firmly positioned, thus improving the safety of the tungsten rod movement. Attached Figure Description

[0026] Figure 1 This is an overall structural diagram of the utility model.

[0027] Figure 2 This is a utility model Figure 1 A longitudinal sectional view.

[0028] Figure 3 This is a utility model Figure 2 A magnified view of a portion of region A in the middle.

[0029] Figure 4 This is an exploded view of this utility model.

[0030] Figure 5 This is an exploded view of the locking component and the rotating shaft of this utility model.

[0031] In the figure: 1. Fixed base; 2. Rotating shaft; 21. Snap-fit ​​surface; 3. Cover assembly; 30. Air extraction channel; 31. Cover plate; 32. Connecting arm; 321. Rotating cylinder part; 3211. Rotating hole; 3212. Friction mating protrusion; 4. Elastic element; 5. Damping sleeve; 51. Clamping part; 6. Locking element. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] A damping suction hood for rare earth electrolysis furnaces, such as Figures 1-5As shown, the device includes a fixed base 1 and two cover assemblies 3. The two cover assemblies 3 are rotatably connected to the fixed base 1 via a rotating shaft 2. Each cover assembly 3 includes a cover plate 31 and a connecting arm 32. The two cover plates 31 are arranged opposite to each other and interlock to form an air extraction channel 30. One of the cover plates 31 is provided with an air intake pipe communicating with the air extraction channel 30. In this embodiment, the rotating shaft 2 is fixedly connected to the fixed base 1, and a damping structure is provided between the rotating shaft 2 and the corresponding connecting arm 32. When the two cover assemblies 3 are opened relative to each other, the damping structure is used to drive the cover... The shell assembly 3 is held in the corresponding open position. In other embodiments, one end of the rotating shaft 2 can also be fixedly connected to the connecting arm 32. The damping structure is correspondingly arranged between the rotating shaft 2 and the fixed seat 1. One end of the rotating shaft 2 is fixedly connected to the fixed seat 1. The damping structure includes an elastic element 4, a damping sleeve 5, and a locking element 6. The damping sleeve 5 is slidably sleeved on the rotating shaft 2, and the damping sleeve 5 and the rotating shaft 2 are anti-rotationally engaged by an anti-rotation structure. The connecting arm 32 is provided with a rotating hole 3211 corresponding to the rotating shaft 2. One end of the connecting arm 32 passes through the rotating hole 3211. 1. Rotatably connected to the outside of the rotating shaft 2, the elastic element 4 drives the damping sleeve 5 to press against the connecting arm 32 and engage with it in a damping manner. The locking element 6 locks onto the rotating shaft 2 and engages with the connecting arm 32 to prevent it from detaching. The elastic force of the elastic element 4 elastically presses the damping sleeve 5 against the connecting arm 32. When the cover plate 31 rotates, it drives the connecting arm 32 to rotate synchronously. When the connecting arm 32 rotates to a predetermined angle, the static friction between the damping sleeve 5 and the connecting arm 32 can be used to achieve the suspension of the connecting arm 32 at any rotation angle. The anti-rotation structure includes a snap-fit ​​surface. The damping sleeve 5 has a locking part 51 and a locking surface 21 on the side wall of the rotating shaft 2. The locking part 51 is located on the inner wall of the damping sleeve 5. The locking surface 21 and the locking part 51 lock together and prevent rotation. The locking and positioning of the locking surface 21 and the locking part 51 makes the damping sleeve 5 more stable on the rotating shaft 2, effectively preventing the damping sleeve 5 from rotating relative to the rotating shaft 2. The connecting arm 32 is designed as a hollow structure, which makes the overall weight of the connecting arm 32 lighter and reduces the possibility of the connecting arm 32 rotating due to its own weight.

[0034] like Figures 2-5 As shown, there are two damping sleeves 5, one of which is located between the connecting arm 32 and the elastic element 4, and the other is located between the connecting arm 32 and the locking element 6. Through the damping cooperation of multiple damping sleeves 5, the upper and lower ends of the connecting arm 32 are positioned on both sides, improving the positioning capability of the connecting arm 32. The elastic element 4 is a butterfly spring, which elastically abuts against the fixed seat 1 and the corresponding damping sleeve 5. The butterfly spring has a high load capacity and good buffering performance, while also saving space, making the structure of this utility model more compact. The locking element 6 is a locking nut, which is threadedly connected to the rotating shaft 2. The operator can adjust the elastic force of the elastic element 4 by turning the locking nut in the forward or reverse direction, thereby adjusting the frictional resistance between the damping sleeve 5 and the connecting arm 32.

[0035] like Figures 1-4 As shown, the connecting arm 32 is fixedly provided with a rotating cylinder 321 corresponding to the rotating shaft 2. A rotating hole 3211 is opened on the rotating cylinder 321. The end of the rotating cylinder 321 facing the damping sleeve 5 is provided with a friction-fitting protrusion 3212. The rotating cylinder 321 is damped by the damping sleeve 5 through the friction-fitting protrusion 3212. The damping sleeve 5 and / or the rotating cylinder 321 are made of wear-resistant material. In this embodiment, the damping sleeve 5 can be made of wear-resistant material with a Brinell hardness of 60-1000, which can improve the wear resistance of the friction component of this utility model, thereby extending the service life of the friction component of this utility model. The friction contact surface between the damping sleeve 5 and the friction-fitting protrusion 3212 is set as a plane. The friction contact area of ​​the plane is larger, which is beneficial to improving the friction resistance of this utility model.

[0036] The basic working principle of this utility model is as follows: Two cover assemblies 3 are rotatably connected to the fixed base 1 via a rotating shaft 2. The cover assembly 3 includes a cover plate 31 and a connecting arm 32. The connecting arm 32 is provided with a rotating hole 3211 corresponding to the rotating shaft 2. One end of the rotating shaft 2 is fixedly connected to the fixed plate, and a damping structure is provided between the rotating shaft 2 and the connecting arm 32. When in use, the cover assemblies 3 on both sides close together to form an exhaust channel 30. The exhaust gas generated by the electrolytic furnace is extracted through the exhaust channel 30. The damping structure can improve the stability of the mutual contact between the cover plates 31 on both sides. When it is necessary to move the tungsten rod, the cover plates 31 on both sides are opened to separate them. At this time, the damping structure can keep the corresponding cover assembly 3 in the open position, preventing the cover assembly 3 from accidentally closing when the tungsten rod is moved, thereby improving the smoothness and safety of the tungsten rod movement. It has the effect that the cover assembly can be suspended at any angle and the cover assembly is firmly positioned, thereby improving the safety of the tungsten rod movement.

[0037] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A damping suction hood for a rare earth electrolysis furnace, comprising a fixed base (1) and two hood assemblies (3), the two hood assemblies (3) being rotatably connected to the fixed base (1) via a rotating shaft (2), each hood assembly (3) comprising a cover plate (31) and a connecting arm (32), the two cover plates (31) being arranged opposite to each other and interlocking to form an exhaust channel (30), characterized in that: The rotating shaft (2) is fixedly connected to the fixed base (1) or the connecting arm (32), and a damping structure is provided between the rotating shaft (2) and the corresponding connecting arm (32) or fixed base (1). When the two cover assemblies (3) are opened relative to each other, the damping structure is used to drive the cover assembly (3) to remain in the corresponding open position.

2. A damper induced draft hood for a rare earth electrolytic cell as claimed in claim 1, wherein: One end of the rotating shaft (2) is fixedly connected to the fixed base (1). The damping structure includes an elastic element (4), a damping sleeve (5), and a locking element (6). The damping sleeve (5) is slidably sleeved on the rotating shaft (2), and the damping sleeve (5) and the rotating shaft (2) are anti-rotationally engaged by an anti-rotation structure. The connecting arm (32) is provided with a rotating hole (3211) corresponding to the rotating shaft (2). One end of the connecting arm (32) is rotatably connected to the outside of the rotating shaft (2) through the rotating hole (3211). The elastic element (4) drives the damping sleeve (5) to press against the connecting arm (32) and engage with it in a damping manner. The locking element (6) is locked on the rotating shaft (2) and engages with the connecting arm (32) to prevent it from detaching.

3. A damper induced draft hood for a rare earth electrolytic cell as claimed in claim 2, wherein: At least two damping sleeves (5) are provided, and at least one damping sleeve (5) is provided between the connecting arm (32) and the elastic member (4), and at least one damping sleeve (5) is provided between the connecting arm (32) and the locking member (6).

4. The damper induced draft hood for rare earth electrolytic cell according to claim 2, characterized in that: The elastic element (4) is a butterfly spring, which elastically abuts against the fixed seat (1) and the corresponding damping sleeve (5).

5. The damper induced draft hood for rare earth electrolytic cell as claimed in claim 2, wherein: The locking component (6) is a locking nut, and the locking nut is threadedly connected to the rotating shaft (2).

6. The damper induced draft hood for rare earth electrolytic cell as claimed in claim 2, wherein: The anti-rotation structure includes a snap-fit ​​surface (21) and a locking part (51). The snap-fit ​​surface (21) is opened on the side wall of the rotating shaft (2), and the locking part (51) is provided on the inner wall of the damping sleeve (5). The snap-fit ​​surface (21) and the locking part (51) are locked together and anti-rotation are prevented.

7. The damper induced draft hood for rare earth electrolytic cell as claimed in claim 2, wherein: The connecting arm (32) is fixed with a rotating cylinder (321) corresponding to the rotating shaft (2). The rotating hole (3211) is opened on the rotating cylinder (321). The end of the rotating cylinder (321) facing the damping sleeve (5) is provided with a friction fit protrusion (3212). The rotating cylinder (321) is damped by the damping sleeve (5) through the friction fit protrusion (3212).

8. A damper induced draft hood for a rare earth electrolytic cell as claimed in claim 7, wherein: The damping sleeve (5) and / or the rotating part (321) are made of wear-resistant material.

9. A damping suction hood for a rare earth electrolysis furnace according to claim 7, characterized in that: The friction contact surface between the damping sleeve (5) and the friction fit protrusion (3212) is set as a plane.

10. A damping suction hood for a rare earth electrolysis furnace according to claim 1, characterized in that: The connecting arm (32) is designed as a hollow structure.

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