Bell pliers

Abstract

The present invention relates to bell-shaped pliers. The device includes a cylinder, guide rods are arranged horizontally at intervals on the upper surface of the cylinder, guide column blocks are arranged on the side of each guide rod facing the central axis of the cylinder, each guide column block is located on the same horizontal plane, a crossbeam is arranged between the cylinder and the guide column block, the horizontal crossbeam is movably inserted on each guide rod, a clamping control mechanism is arranged on the upper surface of the crossbeam, both ends of the crossbeam located outside the cylinder are hinged with clamping components, an open groove is opened on the cylinder corresponding to each clamping component, a hook-shaped rod of the clamping component is hinged in each open groove, the hook-shaped rod includes a vertical rod and a connecting rod, an angle is formed between the connecting rod and the vertical rod that is inclined downward outside the cylinder, and the upper end of each connecting rod is hinged with the corresponding end of the crossbeam via a pull rod. Due to the coordinated arrangement of the clamping control mechanism, the crossbeam and the cylinder, the external graphite electrode can be clamped and transported quickly, and the device is suitable for industrial production and has strong practicality.

Description

Technical Field

[0001] The invention belongs to the technical field of metal smelting, and in particular relates to bell pliers. Background Art

[0002] my country's metallurgical industry is developing rapidly, especially the production of graphite electrodes, which has exceeded half of the world's production. Therefore, equipment for installing graphite electrodes on electric furnaces has become a must. Before using graphite electrodes, short electrodes need to be connected into long electrodes to be used. After the connection is completed, the assembled electrodes need to be grabbed and then hoisted above the electric arc furnace by the factory crane, waiting to be installed on the electric furnace. Therefore, the electrode grabbing device is particularly important. Summary of the invention

[0003] The technical problem to be solved by the present invention is that before using the graphite electrode, short electrodes need to be connected to form the long electrode to be used. After the connection is completed, the assembled electrode needs to be grabbed. The existing grabbing device has poor stability. In order to improve its shortcomings, the present invention provides a bell-shaped pliers.

[0004] To achieve the above object, the present invention is implemented by the following technical solutions:

[0005] A bell-shaped pliers comprises a vertically arranged cylinder, guide rods are horizontally arranged at intervals on the upper surface of the cylinder, guide column blocks are arranged on the side of each guide rod facing the central axis of the cylinder, each guide column block is located on the same horizontal plane, a crossbeam is arranged between the cylinder and the guide column block, the horizontally arranged crossbeam is movably inserted on each guide rod, a clamping and loosening control mechanism is arranged on the upper surface of the crossbeam, clamping parts are hinged at both ends of the crossbeam located outside the cylinder, an open groove is opened on the cylinder corresponding to each clamping part, a hook-shaped rod of the clamping part is hinged in each open groove, the hook-shaped rod comprises a vertical rod embedded in the open groove and a connecting rod connected to the lower end of the vertical rod, an angle is formed between the downwardly inclined connecting rod located outside the cylinder and the vertical rod, and the upper end of each connecting rod is hinged to the corresponding end of the crossbeam via a pull rod.

[0006] When the present invention is working, before use, the clamping and loosening control mechanism is connected with the guide column block on the guide rod, and the clamping and loosening control mechanism, the cross beam and the cylinder are aligned with the external graphite electrode through the crane to make the cylinder sleeved on the graphite electrode. After the sleeved connection is completed, the clamping and loosening control mechanism is separated from the guide column block on the guide rod, and the separation is driven by the crane to drive the clamping and loosening control mechanism and the cross beam to move vertically upward. When the cross beam moves upward, it drives the pull rod to rotate, and the pull rod drives the connecting rod and the vertical rod to rotate, so that the upper end of the vertical rod contacts the outer surface of the external graphite electrode. At this time, the crane continues to move upward, driving the external graphite electrode to move upward. When the external graphite electrode arrives at the destination, the external graphite electrode is vertically lowered by the crane. After the placement is completed, the clamping and loosening control mechanism is connected with the guide column block on the guide rod, and after the connection, it is lifted by the crane, and finally the clamping and loosening control mechanism, the cross beam and the cylinder are separated from the external graphite electrode, completing the transportation of the external graphite electrode.

[0007] Compared with the prior art, the present invention has the following beneficial effects: due to the coordinated arrangement of the clamping and loosening control mechanism, the crossbeam and the cylinder, the external graphite electrode can be quickly clamped and transported, and the device is suitable for industrial production and has strong practicality.

[0008] The pull rod is a shock absorber assembly, which includes a square frame, the upper end of the square frame is hinged to one end of the crossbeam through a first connecting rod, the lower end of the square frame is plugged with a second connecting rod, the end of the second connecting rod outside the square frame is hinged to the upper end of the corresponding connecting rod, and a compression spring is sleeved on the second connecting rod inside the square frame, one end of the compression spring abuts against the inner bottom surface of the square frame, and the other end is connected to the upper end of the second connecting rod. The setting of the shock absorber assembly allows the inertia force to be buffered when the crane is hoisted, reducing damage to the external graphite electrode.

[0009] A limiting plate is arranged on the upper end of the second connecting rod, one end of the compression spring abuts against the lower surface of the limiting plate, and the other end abuts against the inner bottom surface of the square frame.

[0010] A guide cone housing is provided at the bottom of the cylinder to match the external graphite electrode. The guide cone housing is provided in a truncated cone shape. The upper bottom surface of the guide cone housing is connected to the lower bottom surface of the cylinder. The guide cone housing is provided coaxially with the cylinder. The provision of the guide cone housing enables the crane to align the cylinder with the external graphite electrode with higher accuracy and faster speed.

[0011] A clamping jaw for clamping an external graphite electrode is connected to the free end of each vertical rod, and the clamping jaw is hinged to the corresponding free end of the vertical rod, and the surface of the clamping jaw in contact with the external graphite electrode is provided with anti-slip teeth. The provision of the anti-slip teeth enables the clamping jaw to clamp the external graphite electrode more firmly, making the transport action safer.

[0012] The clamping and releasing control mechanism includes a hinge mechanism, a ratchet and pawl mechanism is connected at the hinge of the hinge mechanism, the ratchet and pawl mechanism is connected to the cam mechanism via a gear transmission mechanism, and also includes a shell, the hinge mechanism includes a lifting ring arranged outside the shell, the free end of the lifting ring is hinged with a horizontal rotating shaft, one end of the horizontal rotating shaft is fixedly connected to the lifting ring, and the other end is arranged in the shell, one end of the horizontal rotating shaft located in the shell is sleeved with a shift fork, and the shift fork and the horizontal rotating shaft move as a whole, the ratchet and pawl mechanism includes a pawl fixed to the shift fork, the free end of the pawl abuts on the ratchet, the ratchet is gap sleeved on the horizontal rotating shaft located in the shell, a stopping claw is arranged in the shell on one side of the ratchet, and the claw part of the stopping claw abuts on the ratchet, the gear transmission mechanism includes a first gear gap sleeved on the horizontal rotating shaft, the first gear and the ratchet are connected via a connecting component, the first gear and the ratchet are The wheels move together, the cam mechanism includes a camshaft horizontally arranged in a shell, the camshaft is sleeved with a second gear meshing with the first gear, the camshaft is also sleeved with an elliptical cam, the cam, camshaft and the second gear move together, a horizontal through hole is opened in the shell on both sides of the cam, a vertical baffle is arranged in the through hole, a horizontal push rod is movably inserted in the vertical baffle, one end of the push rod is in contact with the outer circular surface of the cam, and the other end is connected with a lifting rectangular key, the lifting rectangular key is movably inserted in the through hole and moves together with the push rod, when the cam major axis section is in a horizontal state, the upper surface of the lifting rectangular key is in contact with the lower surface of the guide column block, a boss is arranged on the push rod facing the cam, and a compression spring is sleeved on the push rod located between the vertical baffle and the boss, one end of the compression spring is in contact with the boss, and the other end is in contact with the vertical baffle.

[0013] The ratchet is a gap ratchet, and four ratchet teeth are arranged on the gap ratchet. The four ratchet teeth are evenly distributed in a radial manner with the center line of the gap ratchet as the axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the initial state structure before the present invention is used.

[0015] Figure 2 It is a schematic diagram of the structure of the present invention when the external graphite electrode is clamped.

[0016] In the figure: 1 cylinder, 2 guide rod, 3 guide column block, 4 cross beam, 5 clamping and loosening control mechanism, 6 opening groove, 7 hook rod, 701 vertical rod, 702 connecting rod, 8 pull rod, 9 square frame, 10 first connecting rod, 11 second connecting rod, 12 compression spring, 13 limit plate, 14 guide cone shell, 15 clamping claw, 16 anti-slip tooth pattern, 17 cam, 18 lifting rectangular key, 19 lifting ring, 20 ratchet. DETAILED DESCRIPTION

[0017] The technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1-2As shown, it is a bell-shaped pliers, including a vertically arranged cylinder 1, guide rods 2 are horizontally arranged at intervals on the upper surface of the cylinder 1, and guide column blocks 3 are arranged on the side of each guide rod 2 facing the central axis of the cylinder 1, and each guide column block 3 is located on the same horizontal plane. A crossbeam 4 is arranged between the cylinder 1 and the guide column block 3, and the horizontally arranged crossbeam 4 is movably inserted on each guide rod 2. A clamping and loosening control mechanism 5 is arranged on the upper surface of the crossbeam 4, and both ends of the crossbeam 4 located outside the cylinder 1 are hinged with clamping parts, and an open groove 6 is opened on the cylinder 1 corresponding to each clamping part, and a hook-shaped rod 7 of the clamping part is hinged in each open groove 6, and the hook-shaped rod 7 includes a vertical rod 701 embedded in the open groove 6 and a connecting rod 702 connected to the lower end of the vertical rod 701, and an angle is formed between the connecting rod 702 inclined downward outside the cylinder 1 and the vertical rod 701, and the upper end of each connecting rod 702 is hinged to the corresponding end of the crossbeam 4 through a pull rod 8. The pull rod 8 is a shock absorber assembly, which includes a square frame 9. The upper end of the square frame 9 is hinged to one end of the cross beam 4 through the first connecting rod 10. The lower end of the square frame 9 is plugged with a second connecting rod 11. The end of the second connecting rod 11 outside the square frame 9 is hinged to the upper end of the corresponding connecting rod 702. A compression spring 12 is sleeved on the second connecting rod 11 inside the square frame 9. One end of the compression spring 12 abuts against the inner bottom surface of the square frame 9, and the other end is connected to the upper end of the second connecting rod 11. The setting of the shock absorber assembly allows the inertial force to be buffered when the crane is hoisted, reducing damage to the external graphite electrode. A limit plate 13 is set on the upper end of the second connecting rod 11. One end of the compression spring 12 abuts against the lower surface of the limit plate 13, and the other end abuts against the inner bottom surface of the square frame 9. A guide cone shell 14 is provided at the bottom of the cylinder 1 to cooperate with the external graphite electrode. The guide cone shell 14 is provided in a truncated cone shape. The upper bottom surface of the guide cone shell 14 is connected to the lower bottom surface of the cylinder 1. The guide cone shell 14 is provided coaxially with the cylinder 1. The provision of the guide cone shell 14 enables the crane to align the cylinder 1 with the external graphite electrode with higher accuracy and faster speed. A clamping jaw 15 for clamping the external graphite electrode is connected to the free end of each vertical rod 701. The clamping jaw 15 is hinged to the free end of the corresponding vertical rod 701, and the surface of the clamping jaw 15 in contact with the external graphite electrode is provided with an anti-skid tooth pattern 16. The provision of the anti-skid tooth pattern 16 enables the clamping jaw 15 to clamp the external graphite electrode more firmly, making the transportation action safer.The clamping and releasing control mechanism 5 includes a hinge mechanism, a ratchet and pawl mechanism is connected to the hinge of the hinge mechanism, the ratchet and pawl mechanism is connected to the cam mechanism via a gear transmission mechanism, and also includes a shell, the hinge mechanism includes a lifting ring 19 arranged outside the shell, the free end of the lifting ring 19 is hinged with a horizontal rotating shaft, one end of the horizontal rotating shaft is fixedly connected to the lifting ring 19, and the other end is arranged in the shell, one end of the horizontal rotating shaft located in the shell is sleeved with a shift fork, the shift fork and the horizontal rotating shaft move as a whole, the ratchet 20 pawl mechanism includes a pawl fixed to the shift fork, the free end of the pawl abuts on the ratchet 20, the ratchet 20 is gap sleeved on the horizontal rotating shaft located in the shell, a stop pawl is arranged in the shell on one side of the ratchet 20, the pawl portion of the stop pawl abuts on the ratchet 20, the gear transmission mechanism includes a first gear gap sleeved on the horizontal rotating shaft, the first gear and the ratchet 20 are connected via a connecting component, the first gear and the ratchet 20 move as a whole The cam 17 mechanism includes a camshaft horizontally arranged in the housing, and a second gear meshing with the first gear is sleeved on the camshaft. An elliptical cam 17 is also sleeved on the cam 17 shaft. The cam 17, the camshaft and the second gear move together. Horizontal through holes are opened in the housing located on both sides of the cam 17, and vertical baffles are arranged in the through holes. A horizontal push rod is movably inserted in the vertical baffle. One end of the push rod abuts against the outer circular surface of the cam 17, and the other end is connected with a lifting rectangular key 18. The lifting rectangular key 18 is movably inserted in the through hole and moves together with the push rod. When the long axis section of the cam 17 is in a horizontal state, the upper surface of the lifting rectangular key 18 abuts against the lower surface of the guide column block 3. A boss is arranged on the push rod facing the cam 17, and a compression spring 12 is sleeved on the push rod located between the vertical baffle and the boss. One end of the compression spring 12 abuts against the boss, and the other end abuts against the vertical baffle. The ratchet 20 is a gap ratchet, and four ratchet teeth are arranged on the gap ratchet. The four ratchet teeth are evenly distributed in a radial manner with the center line of the gap ratchet as the axis.

[0019] When working, the lifting rectangular key 18 on the clamping and loosening control mechanism contacts the guide post block 3 on the guide rod 2, and the guide rod 2 is fixed on the top surface of the cylinder 1. At this time, the clamping claw 15 is retracted to the inner surface of the cylinder 1, and the whole device is in a non-working state. The crane hook hooks the lifting ring 19 on the clamping and loosening control mechanism 5 to move the whole device to the top of the electrode to be installed, and the electrode is dropped. Since the lower end of the cylinder 1 is connected to the guide cone shell 14, the electrode can be smoothly introduced into the cylinder 1. The crane operator drops the crane hook, and the crane hook's own gravity rotates the lifting ring 19 on the clamping and unclamping control mechanism 5 by 90°, and the clamping and unclamping control mechanism 5 obtains power and operates, causing the lifting rectangular key 18 to retract into the clamping and unclamping control mechanism 5; the crane operator raises the hook again, and the clamping and unclamping control mechanism drives the crossbeam 4 to rise, and produces relative movement with the guide rod 2, and the shock absorber assembly and the hook-shaped rod 7 hinged at both ends of the crossbeam 4 are actuated, so that the clamping jaw 15 moves and extends into the cylinder 1, and the clamping surface of the clamping jaw 15 is pressed tightly against the outer cylindrical surface of the graphite electrode. The crane operator causes the hook to continue to rise and move, and at this time, the device can reach the destination by clamping the graphite electrode. After arriving at the destination, the operator operates the crane hook to drop slightly, causing the crossbeam 4 to drop, and after rotating the lifting ring 19 on the clamping control mechanism 5 by 90° again, the lifting rectangular key 18 in the clamping control mechanism 5 extends out of the body and hooks the guide column block 3 on the guide rod 2. When the crane hook rises again, the device leaves the graphite electrode and completes the electrode installation task.

[0020] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present invention, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. Bell-shaped pliers, characterized in that: It includes a vertically arranged cylinder, guide rods are arranged horizontally at intervals on the upper surface of the cylinder, guide column blocks are arranged on the side of each guide rod facing the central axis of the cylinder, each guide column block is located on the same horizontal plane, a crossbeam is arranged between the cylinder and the guide column block, the horizontally arranged crossbeam is movably inserted on each guide rod, a clamping and loosening control mechanism is arranged on the upper surface of the crossbeam, clamping parts are hinged at both ends of the crossbeam located outside the cylinder, an open groove is opened on the cylinder corresponding to each clamping part, a hook-shaped rod of the clamping part is hinged in each open groove, the hook-shaped rod includes a vertical rod embedded in the open groove and a connecting rod connected to the lower end of the vertical rod, located An angle is formed between the inclined downward connecting rod outside the cylinder and the vertical rod, and the upper end of each connecting rod is hinged to the corresponding end of the cross beam through a pull rod. The clamping and loosening control mechanism includes a hinge mechanism, and a ratchet and pawl mechanism is connected to the hinge of the hinge mechanism. The ratchet and pawl mechanism is connected to the cam mechanism through a gear transmission mechanism, and also includes a shell. The hinge mechanism includes a lifting ring arranged outside the shell, and the free end of the lifting ring is hinged with a horizontal rotating shaft, one end of the horizontal rotating shaft is fixedly connected to the lifting ring, and the other end is arranged in the shell, and one end of the horizontal rotating shaft located in the shell is sleeved with a shift fork, and the shift fork moves with the horizontal rotating shaft as a whole. The ratchet and pawl mechanism includes a A pawl fixed to a fork, a free end of the pawl abuts against the ratchet, the ratchet is loosely sleeved on a horizontal rotating shaft located in a housing, a pawl is provided in the housing located on one side of the ratchet, the pawl portion of the pawl abuts against the ratchet, the gear transmission mechanism includes a first gear loosely sleeved on the horizontal rotating shaft, the first gear and the ratchet are connected via a connecting component, the first gear and the ratchet move as a whole, the cam mechanism includes a camshaft horizontally arranged in the housing, a second gear meshing with the first gear is sleeved on the camshaft, an elliptical cam is also sleeved on the camshaft, the cam, the camshaft and the second gear are sleeved on the camshaft, The wheels move integrally, and horizontal through holes are opened in the shell body located on both sides of the cam, and vertical baffles are arranged in the through holes. A horizontal push rod is movably inserted in the vertical baffle, and one end of the push rod abuts against the outer circular surface of the cam, and the other end is connected with a lifting rectangular key. The lifting rectangular key is movably inserted in the through hole and moves integrally with the push rod. When the long axis section of the cam is in a horizontal state, the upper surface of the lifting rectangular key abuts against the lower surface of the guide column block, and a boss is arranged on the push rod facing the cam, and a compression spring is sleeved on the push rod located between the vertical baffle and the boss, and one end of the compression spring abuts against the boss, and the other end abuts against the vertical baffle.

2. The bell pliers according to claim 1, characterized in that: The pull rod is a shock absorber assembly, which includes a square frame. The upper end of the square frame is hinged to one end of the crossbeam via a first connecting rod, a second connecting rod is inserted into the lower end face of the square frame, an end of the second connecting rod outside the square frame is hinged to the upper end of the corresponding connecting rod, and a compression spring is sleeved on the second connecting rod inside the square frame, one end of the compression spring is in contact with the inner bottom surface of the square frame, and the other end is connected to the upper end of the second connecting rod.

3. The bell pliers according to claim 2, characterized in that: A limiting plate is arranged on the upper end of the second connecting rod, one end of the compression spring abuts against the lower surface of the limiting plate, and the other end abuts against the inner bottom surface of the square frame.

4. The bell pliers according to claim 3, characterized in that: A guide cone shell body matched with an external graphite electrode is arranged at the bottom of the cylinder body. The guide cone shell body is arranged in a truncated cone shape. The upper bottom surface of the guide cone shell body is connected to the lower bottom surface of the cylinder body. The guide cone shell body and the cylinder body are arranged coaxially.

5. The bell pliers according to claim 4, characterized in that: A clamping jaw for clamping an external graphite electrode is connected to the free end of each vertical rod. The clamping jaw is hinged to the corresponding free end of the vertical rod, and the surface of the clamping jaw in contact with the external graphite electrode is provided with anti-slip teeth.

6. The bell pliers according to claim 5, characterized in that: The ratchet is a gap ratchet, and four ratchet teeth are arranged on the gap ratchet. The four ratchet teeth are evenly distributed in a radial manner with the center line of the gap ratchet as the axis.

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