Force arm type electrode pressing and releasing device

Abstract

According to the force arm type electrode pressure releasing device, a speed reduction sleeve sleeves an electrode and is in dynamic friction fit with the electrode, and the gravity of the electrode is greater than the dynamic friction force; the clasping copper tile is positioned below the speed reduction sleeve and is hinged with the speed reduction sleeve through a connecting rod; the support ring sleeves the outer side of the electrode, and the clasping copper tile is positioned between the support ring and the electrode; the moment arm lever is located above the supporting ring, a fulcrum of the moment arm lever is hinged to the supporting ring, one end of the moment arm lever is in pressing fit with the clasping copper tile, and the other end is hinged to the lower end of the first push-pull rod; the lower end of the second push-pull rod is fixedly connected with the insulating flange; the catch spring nut is fixedly arranged at the upper end of the second push-pull rod; the support frame is fixedly connected with the speed reduction sleeve; the catch spring nut is located above the lower-layer supporting plate of the supporting frame, and the holding force applying spring is arranged on the outer side of the second push-pull rod between the catch spring nut and the lower-layer supporting plate of the supporting frame in a sleeving mode; a piston rod of the pressing and releasing air cylinder is vertically, downwards and fixedly installed above an upper-layer supporting plate of the supporting frame, and the piston rod and the second push-pull rod are coaxially distributed.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal smelting, and particularly relates to a force arm type electrode pressing and releasing device. Background Art

[0002] In the process of metal smelting using an electric arc furnace, the self-baking electrodes of the electric arc furnace need to be continuously consumed. In order to meet the strength of the working end of the electrode, the self-baking electrodes need to be lowered regularly.

[0003] At present, the electrode pressing device used in the ore-fired furnace is usually composed of a hydraulic mechanical upper brake and a lower brake, and a hydraulic cylinder is connected between the upper brake and the lower brake. When the electrode needs to be lowered, the upper brake is opened first, and then the hydraulic cylinder is controlled to extend, driving the upper brake to rise to a certain height, and then the upper brake is restored to the clamping state, so that the upper brake clamps the self-baking electrode, and then the upper brake is opened, and then the hydraulic cylinder is controlled to retract, driving the upper brake and the self-baking electrode to descend synchronously, until the self-baking electrode is lowered to a set length, and then the lower brake is restored to clamp the self-baking electrode, and the self-baking electrode lowering process is completed.

[0004] However, the existing electrode pressing and releasing device has the disadvantages of complex structure, many failure points and high maintenance cost. The use of the existing electrode pressing and releasing device will indirectly lead to an increase in production costs. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides a lever-arm type electrode pressing and releasing device, which abandons the use of hydraulic components, optimizes the electrode clamping and lowering forms, simplifies the structural design, improves the reliability of electrode clamping and lowering, reduces failure points, lowers maintenance costs, and thus reduces production costs.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a force arm type electrode pressing and releasing device, including a speed reduction sleeve, a clamping copper shoe, a support ring, a force arm lever, a first push-pull rod, a second push-pull rod, a clamping force applying spring, a retaining spring nut, a pressing and releasing cylinder and a support frame; the speed reduction sleeve is coaxially sleeved on the outside of the electrode, and the electrode and the speed reduction sleeve adopt dynamic friction cooperation, and the gravity of the electrode is greater than the dynamic friction between the electrode and the speed reduction sleeve; the clamping copper shoe is located below the speed reduction sleeve, and the clamping copper shoe is connected to the speed reduction sleeve through a connecting rod, the upper end of the connecting rod is hinged to the lower end of the speed reduction sleeve, the lower end of the connecting rod is hinged to the upper end of the clamping copper shoe, and the lower end of the clamping copper shoe is a free end; the support ring is coaxially sleeved on the outside of the electrode, and the clamping copper shoe is located in the annular space between the support ring and the electrode The fulcrum of the lever arm is hinged to the support ring, and one end of the lever arm is pressed and fitted with the clamping copper washer; the lower end of the first push-pull rod is hinged to the other end of the lever arm, and the upper end of the first push-pull rod is hinged with an insulating flange; the lower end of the second push-pull rod is fixedly connected to the insulating flange, and the retaining spring nut is fixedly installed on the upper end of the second push-pull rod; the support frame adopts a double-layer structure, and the support frame is fixedly connected to the speed reduction sleeve; the retaining spring nut is located above the lower support plate of the support frame, and the clamping force applying spring is coaxially mounted on the outside of the second push-pull rod between the retaining spring nut and the lower support plate of the support frame; the compression and release cylinder is vertically fixed above the upper support plate of the support frame, and the piston rod of the compression and release cylinder is vertically downward and coaxially distributed with the second push-pull rod.

[0007] There are four clamping copper washers, which are evenly arranged along the circumferential direction of the electrode. Each clamping copper washers is equipped with a connecting rod, a lever arm, a second push-pull rod, an insulating flange, a first push-pull rod, a retaining spring nut, a clamping force applying spring and a compression cylinder.

[0008] The support ring is a hollow structure, and the internal cavity of the support ring serves as a cooling water circulation cavity, and the clamping copper shoe is cooled through the support ring.

[0009] A protective sleeve is fixedly provided above the support ring, and the connecting rod, the clamping copper bushing, the lever arm and the second push-pull rod are all located inside the protective sleeve.

[0010] A push plate is fixedly arranged on the top end of the piston rod of the compression and release cylinder, and the push plate is matched with the upper end of the second push-pull rod in a push-pull manner.

[0011] Beneficial effects of the utility model:

[0012] The lever-arm type electrode pressing and releasing device of the utility model abandons the use of hydraulic components, optimizes the electrode clamping and lowering forms, simplifies the structural design, improves the reliability of electrode clamping and lowering, reduces the fault points, lowers the maintenance cost, and thus reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a force arm type electrode pressing and releasing device of the utility model (electrode holding state);

[0014] Figure 2 This is a structural schematic diagram of a force arm type electrode pressing device of the utility model (electrode lowering state);

[0015] In the figure, 1 is a speed reduction sleeve, 2 is a clamping copper washer, 3 is a support ring, 4 is a lever arm, 5 is a first push-pull rod, 6 is a second push-pull rod, 7 is a clamping force applying spring, 8 is a retaining spring nut, 9 is a pressure release cylinder, 10 is a support frame, 11 is an electrode, 12 is a connecting rod, 13 is an insulating flange, 14 is a protective sleeve, and 15 is a push plate. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] like Figure 1 , 2 As shown, a force arm type electrode pressing and releasing device comprises a deceleration sleeve 1, a clamping copper washer 2, a support ring 3, a force arm lever 4, a first push-pull rod 5, a second push-pull rod 6, a clamping force applying spring 7, a retaining spring nut 8, a pressing and releasing cylinder 9 and a support frame 10; the deceleration sleeve 1 is coaxially sleeved on the outside of the electrode 11, and the electrode 11 and the deceleration sleeve 1 are matched with dynamic friction, and the gravity of the electrode 11 is greater than the dynamic friction between the electrode 11 and the deceleration sleeve 1; the clamping copper washer 2 is located below the deceleration sleeve 1, and the clamping copper washer 2 is connected to the deceleration sleeve 1 through a connecting rod 12, the upper end of the connecting rod 12 is hinged to the lower end of the deceleration sleeve 1, and the lower end of the connecting rod 12 is hinged to the upper end of the clamping copper washer 2, and the lower end of the clamping copper washer 2 is a free end; the support ring 3 is coaxially sleeved on the outside of the electrode 11, and the clamping copper washer 2 is located in the annular gap between the support ring 3 and the electrode 11; the force arm type electrode pressing and releasing device comprises a first push-pull rod 5, a second push-pull rod 6, a clamping force applying spring 7, a retaining spring nut 8, a pressing and releasing cylinder 9 and a support frame 10; the deceleration sleeve 1 is coaxially sleeved on the outside of the electrode 11, and the clamping copper washer 2 is located in the annular gap between the support ring 3 and the electrode 11; The arm lever 4 is located above the support ring 3, the fulcrum of the force arm lever 4 is hinged to the support ring 3, and one end of the force arm lever 4 is pressed and fitted with the clamping copper washer 2; the lower end of the first push-pull rod 5 is hinged to the other end of the force arm lever 4, and the upper end of the first push-pull rod 5 is hinged with an insulating flange 13; the lower end of the second push-pull rod 6 is fixedly connected to the insulating flange 13, and the retaining spring nut 8 is fixedly installed on the upper end of the second push-pull rod 6; the support frame 10 adopts a double-layer structure, and the support frame 10 is fixedly connected to the speed reduction sleeve 1; the retaining spring nut 8 is located above the lower support plate of the support frame 10, and the clamping force applying spring 7 is coaxially sleeved on the outside of the second push-pull rod 6 between the retaining spring nut 8 and the lower support plate of the support frame 10; the compression and release cylinder 9 is vertically fixed above the upper support plate of the support frame 10, and the piston rod of the compression and release cylinder 9 is vertically downward and coaxially distributed with the second push-pull rod 6.

[0018] There are four clamping copper washers 2, which are evenly arranged along the circumferential direction of the electrode 11. Each clamping copper washers 2 is equipped with a connecting rod 12, a lever arm 4, a second push-pull rod 6, an insulating flange 13, a first push-pull rod 5, a retaining spring nut 8, a clamping force applying spring 7 and a pressure release cylinder 9.

[0019] The support ring 3 is a hollow structure, and the inner cavity of the support ring 3 serves as a cooling water circulation cavity. The clamping copper washer 2 is cooled by the support ring 3 .

[0020] A protective sleeve 14 is fixedly provided above the support ring 3 , and the connecting rod 12 , the clamping copper washer 2 , the lever arm 4 and the second push-pull rod 6 are all located inside the protective sleeve 14 .

[0021] A push plate 15 is fixedly provided at the top end of the piston rod of the compression and release cylinder 9 , and the push plate 15 is pushed and matched with the upper end of the second push-pull rod 6 .

[0022] The following is a description of the one-time use process of the utility model in conjunction with the accompanying drawings:

[0023] When the electrode 11 is in the clamped state, the piston rod of the pressure-release cylinder 9 is in the retracted state, and the push plate 15 is out of contact with the upper end of the second push-pull rod 6. At the same time, the clamping force applying spring 7 is in the extended state, and the retaining spring nut 8 is pushed upward by the clamping force applying spring 7, thereby making the second push-pull rod 6, the insulating flange 13 and the first push-pull rod 5 in the upwardly lifted state together with the retaining spring nut 8. When the first push-pull rod 5 is in the upwardly lifted state, the outer end of the force arm lever 4 will be in the tilted state, and the inner end of the force arm lever 4 will press the clamping copper washer 2 against the electrode 11, so that the electrode 11 is in the clamped state, and the position of the electrode 11 is fixed.

[0024] When it is necessary to control the electrode 11 to be lowered, it is only necessary to control the piston rod of the pressure release cylinder 9 to extend downward until the push plate 15 contacts the upper end of the second push-pull rod 6 and presses down the second push-pull rod 6, so that the second push-pull rod 6 moves downward. As the second push-pull rod 6 moves downward, the spring nut 8 will move downward synchronously, so that the distance between the spring nut 8 and the upper support plate of the support frame 10 becomes smaller, and the clamping force application spring 7 is compressed. At the same time, during the downward movement of the second push-pull rod 6, the insulating flange 13 and the first push-pull rod 5 will also move downward together, and then the outer end of the force arm lever 4 will swing downward through the downwardly moved first push-pull rod 5, and the inner end of the force arm lever 4 will tilt upward until the inner end of the force arm lever 4 releases the clamping copper washer 2. At this time, since the clamping copper washer 2 releases the clamping of the electrode 11, the electrode 11 begins to overcome the dynamic friction between the electrode 11 and the deceleration casing 1 by its own gravity, so that the electrode 11 moves downward slowly, and finally realizes the automatic lowering of the electrode 11.

[0025] When the lowering distance of the electrode 11 reaches the set value, the piston rod of the pressure-release cylinder 9 is retracted to restore the push plate 15 and the upper end of the second push-pull rod 6 to a state of being out of contact again. As the piston rod of the pressure-release cylinder 9 retracts, the spring force of the clamping force applying spring 7 is gradually released, and the clamping force applying spring 7 gradually restores the extended state, thereby pushing the retaining spring nut 8 upward again, and simultaneously pushing the second push-pull rod 6, the insulating flange 13 and the first push-pull rod 5 upward synchronously. When the first push-pull rod 5 restores the upward lifting state, the outer end of the force arm lever 4 also restores the tilted state again, thereby restoring the inner end of the force arm lever 4 to the clamping copper washer 2 again, and finally the electrode 11 is clamped again by the clamping copper washer 2, and the position of the electrode 11 is fixed again.

[0026] Even if the release cylinder 9 fails during the lowering of the electrode 11, causing the piston rod of the release cylinder 9 to lose pneumatic force, the clamping force applying spring 7 will quickly extend and reset, thereby allowing the electrode 11 to quickly return to the clamped state, thereby ensuring the safety and reliability of the electrode 11 when it is lowered.

[0027] The solutions in the embodiments are not intended to limit the patent protection scope of the present utility model. Any equivalent implementation or modification that does not deviate from the present utility model is included in the patent scope of this case.

Claims

1. A lever-arm type electrode pressing and releasing device, characterized in that: It includes a speed reduction sleeve, a clamping copper washer, a support ring, a force arm lever, a first push-pull rod, a second push-pull rod, a clamping force applying spring, a retaining spring nut, a pressure release cylinder and a support frame; the speed reduction sleeve is coaxially sleeved on the outside of the electrode, and the electrode and the speed reduction sleeve are matched with dynamic friction, and the gravity of the electrode is greater than the dynamic friction between the electrode and the speed reduction sleeve; the clamping copper washer is located below the speed reduction sleeve, and the clamping copper washer and the speed reduction sleeve are connected through a connecting rod, the upper end of the connecting rod is hinged to the lower end of the speed reduction sleeve, the lower end of the connecting rod is hinged to the upper end of the clamping copper washer, and the lower end of the clamping copper washer is a free end; the support ring is coaxially sleeved on the outside of the electrode, and the clamping copper washer is located in the annular gap between the support ring and the electrode; the force arm lever is located above the support ring, The fulcrum of the lever arm is hinged to the support ring, and one end of the lever arm is pressed and fitted with the clamping copper washer; the lower end of the first push-pull rod is hinged to the other end of the lever arm, and the upper end of the first push-pull rod is hinged with an insulating flange; the lower end of the second push-pull rod is fixedly connected to the insulating flange, and the retaining spring nut is fixedly installed on the upper end of the second push-pull rod; the support frame adopts a double-layer structure, and the support frame is fixedly connected to the speed reduction sleeve; the retaining spring nut is located above the lower support plate of the support frame, and the clamping force applying spring is coaxially sleeved on the outside of the second push-pull rod between the retaining spring nut and the lower support plate of the support frame; the compression and release cylinder is vertically fixed above the upper support plate of the support frame, and the piston rod of the compression and release cylinder is vertically downward and coaxially distributed with the second push-pull rod.

2. The lever-arm type electrode pressing and releasing device according to claim 1, characterized in that: There are four clamping copper washers, which are evenly arranged along the circumferential direction of the electrode. Each clamping copper washers is equipped with a connecting rod, a lever arm, a second push-pull rod, an insulating flange, a first push-pull rod, a retaining spring nut, a clamping force applying spring and a compression cylinder.

3. The lever-arm type electrode pressing and releasing device according to claim 1, characterized in that: The support ring is a hollow structure, and the internal cavity of the support ring serves as a cooling water circulation cavity, and the clamping copper shoe is cooled through the support ring.

4. The lever-arm type electrode pressing and releasing device according to claim 1, characterized in that: A protective sleeve is fixedly provided above the support ring, and the connecting rod, the clamping copper bushing, the lever arm and the second push-pull rod are all located inside the protective sleeve.

5. The lever-arm type electrode pressing and releasing device according to claim 1, characterized in that: A push plate is fixedly arranged on the top end of the piston rod of the compression and release cylinder, and the push plate is matched with the upper end of the second push-pull rod in a push-pull manner.

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