Graphite electrode hoisting clamp

Abstract

The utility model discloses a graphite electrode hoisting clamp in the technical field of hoisting clamps. The lifting clamp comprises a lifting frame, the lifting frame is provided with a lifting ring, clamp bodies are arranged at the two ends of the lifting frame, one clamp body is used for clamping one end of a graphite electrode, and the other clamp body is used for clamping the other end of the graphite electrode; each clamp body forms a rhombic connecting rod mechanism through a transmission rod, a clamp is arranged at the lower end of each rhombic connecting rod mechanism and comprises two symmetrical clamping teeth, the clamping teeth are used for making contact with the lower middle portion of the peripheral face of the graphite electrode and are provided with rotatable pressing blocks, one ends of the pressing blocks are hinged to the clamping teeth, and the other ends of the pressing blocks make contact with the upper middle portion of the peripheral face of the graphite electrode. And the pressing block is provided with a cylinder for driving the pressing block to press the graphite electrode. The clamp has the advantages that clamping is more stable, and the safety coefficient is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting fixtures, in particular to a graphite electrode lifting fixture. Background Art

[0002] Graphite electrodes are made from petroleum coke and needle coke as raw materials, coal tar pitch as a binder, through raw material calcination, crushing and grinding, batching, kneading, forming, baking, impregnation, graphitization, and machining. They are important high-temperature conductive materials for electric arc furnaces. Electric energy is input into the electric arc furnace through graphite electrodes, and the high temperature generated by the electric arc between the electrode end and the furnace charge is used as a heat source to melt the furnace charge for steelmaking. Graphite electrodes are also used as conductive materials in some other submerged arc furnaces for smelting materials such as yellow phosphorus, industrial silicon, and abrasives. Due to their excellent and special physical and chemical properties, graphite electrodes also have a wide range of uses in other industrial sectors. However, due to their large diameter, long length, and large self-weight, graphite electrodes are very difficult to install and lift, and are prone to bumping of the electrodes. Electrode bumping is likely to cause damage such as fracture, corner breakage, and scratches. Electrode fracture will result in the scrapping of the electrode. After electrodes with corner breakage or scratches are installed in the electric arc furnace, since the electric arc furnace brake cannot fit stably with the electrode, the electrode is likely to slip, causing production accidents in the electric arc furnace.

[0003] The prior art discloses a quick lifting and installation fixture for small components, with the authorization announcement number CN212269195U and the authorization announcement date of January 1, 2021. It includes a fixture monomer, and the fixture monomer forms a rhombic link mechanism by a transmission rod (3). The lower end of the rhombic link mechanism extends to form a fixture (5). It is characterized in that the upper ends of the intersections of several rhombic link mechanisms are connected by a main suspension rod (2), a suspension chain (1) is arranged on the main suspension rod (2), the intersections on both sides and the lower end of the rhombic link mechanism are respectively connected by a rotating shaft (4), a clamping piece (6) is installed inside the end of the fixture (5), and a rubber plate is arranged on the clamping piece (6). The prior art tightens the two clamping pieces during lifting by setting a rhombic link mechanism. However, when the lifting fixture in the prior art is directly used for lifting graphite electrodes, there are still the following problems:

[0004] The existing fixtures mainly clamp through two clamping pieces. However, the contact surface between the clamping piece and the graphite electrode is limited, and the graphite electrode has a large self-weight. Once it falls off, it will be very dangerous, presenting a safety hazard. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a graphite electrode lifting fixture with more stable clamping and improved safety factor.

[0006] In order to achieve the above-mentioned utility model purpose, the following technical solutions are adopted for the graphite electrode lifting fixture of the utility model:

[0007] A graphite electrode lifting fixture, comprising a suspension bracket, the suspension bracket is provided with a lifting ring, and fixture bodies are arranged at both ends of the suspension bracket. One fixture body is used to clamp one end of the graphite electrode, and the other fixture body is used to clamp the other end of the graphite electrode; each fixture body consists of a transmission rod to form a rhombic link mechanism, and a clamp is arranged at the lower end of the rhombic link mechanism. The clamp includes two symmetric clamping teeth, and the clamping teeth are used to contact the middle and lower parts of the outer peripheral surface of the graphite electrode. The clamping teeth are provided with rotatable pressing blocks. One end of the pressing block is hinged to the clamping tooth, and the other end of the pressing block contacts the middle and upper parts of the outer peripheral surface of the graphite electrode. The pressing block is provided with a cylinder for driving it to press the graphite electrode.

[0008] Preferably, a seat plate is arranged at the lower end of the rhombic link mechanism, and the clamping teeth are fixed on the seat plate.

[0009] Preferably, the cylinder block of the cylinder is hinged to the seat plate, and the piston rod of the cylinder is hinged to the pressing block.

[0010] Preferably, the surface of the clamping tooth in contact with the graphite electrode is set as a first arc surface, and a first rubber layer is arranged on the first arc surface. Through the arrangement of the first rubber layer, the friction force between the clamping tooth and the outer peripheral surface of the graphite electrode is increased, and the clamping is more stable.

[0011] Preferably, the surface of the pressing block in contact with the graphite electrode is set as a second arc surface, and a second rubber layer is arranged on the second arc surface. Through the arrangement of the second rubber layer, the friction force between the pressing block and the outer peripheral surface of the graphite electrode is increased, and the clamping is more stable.

[0012] Preferably, the upper cross - over part of the rhombic link mechanism is connected by an upper rotating shaft, the end of the suspension bracket is connected to the upper rotating shaft, and the two sides and the lower cross - over parts of the rhombic link mechanism are respectively connected by lower rotating shafts.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The clamping teeth of the present utility model clamp the middle and lower parts of the outer peripheral surface of the graphite electrode under the action of the rhombic link mechanism, and the pressing block presses the middle and upper parts of the graphite electrode under the drive of the cylinder. Therefore, under the combined action of the clamping teeth and the pressing block, the graphite electrode is tightly surrounded and clamped, making the clamping more stable, improving the safety factor, especially applicable to graphite electrodes of different sizes, and having practicability. Description of the Drawings

[0015] Figure 1 is a structural schematic diagram of the present utility model;

[0016] Figure 2 is a structural schematic diagram of the fixture body;

[0017] Figure 3 is a schematic diagram of the fixture body for clamping graphite electrodes of different sizes;

[0018] Figure 4 For Figure 3 the enlarged view of part A.

[0019] Among them, 1 is the lifting ring, 2 is the hanger, 3 is the fixture body, 4 is the graphite electrode, 5 is the rhombic link mechanism, 501 is the transmission rod, 502 is the upper rotating shaft, 503 is the lower rotating shaft, 6 is the seat plate, 7 is the cylinder, 8 is the pressure block, 9 is the clamping jaw, 10 is the first rubber layer, and 11 is the second rubber layer. Specific embodiments

[0020] The following further clarifies the present utility model in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. After reading the present utility model, various equivalent modifications made by those skilled in the art to the present utility model fall within the scope defined by the appended claims of this application.

[0021] As Figures 1-4 shown, a graphite electrode lifting fixture includes a hanger 2. The hanger 2 is provided with a lifting ring 1. Clamping fixture bodies 3 are provided at both ends of the hanger 2. One of the clamping fixture bodies 3 is used to clamp one end of the graphite electrode 4, and the other clamping fixture body 3 is used to clamp the other end of the graphite electrode 4; each clamping fixture body 3 consists of a transmission rod 501 to form a rhombic link mechanism 5. The upper end of the intersection of the rhombic link mechanism 5 is connected through an upper rotating shaft 502. The end of the hanger 2 is connected to the upper rotating shaft 502. The two sides and the lower intersection of the rhombic link mechanism 5 are respectively connected through a lower rotating shaft 503; a clamp is provided at the lower end of the rhombic link mechanism 5. The clamp includes two symmetric clamping jaws 9. The clamping jaws 9 are used to contact the middle and lower parts of the outer peripheral surface of the graphite electrode 4. The surface of the clamping jaw 9 in contact with the graphite electrode 4 is set as a first arc surface. The first arc surface is provided with a first rubber layer 10. Through the setting of the first rubber layer 10, the friction force between the clamping jaw 9 and the outer peripheral surface of the graphite electrode 4 is increased, and the clamping is more stable; the clamping jaw 9 is provided with a rotatable pressure block 8. One end of the pressure block 8 is hinged to the clamping jaw 9. The other end of the pressure block 8 contacts the middle and upper parts of the outer peripheral surface of the graphite electrode 4. The surface of the pressure block 8 in contact with the graphite electrode 4 is set as a second arc surface. The second arc surface is provided with a second rubber layer 11. Through the setting of the second rubber layer 11, the friction force between the pressure block 8 and the outer peripheral surface of the graphite electrode 4 is increased, and the clamping is more stable; the pressure block 8 is provided with a cylinder 7 for driving it to press the graphite electrode 4; a seat plate 6 is provided at the lower end of the rhombic link mechanism 5. The clamping jaw 9 is fixed on the seat plate 6; the cylinder body of the cylinder 7 is hinged to the seat plate 6, and the piston rod of the cylinder 7 is hinged to the pressure block.

[0022] The specific working process and principle of the present utility model: When hoisting the graphite electrode 4, two fixture bodies 3 are provided. One fixture body 3 clamps one end of the graphite electrode 4, and the other fixture body 3 clamps the other end of the graphite electrode 4. The clamping teeth 9 are opened. The crane hook is connected to the lifting ring 1 through a steel wire rope. The crane lifts, and the diamond link mechanism 5 is stressed and contracts to drive the clamping teeth 9 to contract inward. When the contraction reaches the same diameter as the graphite electrode 4, the clamping teeth 9 tightly hold the middle and lower parts of the outer peripheral surface of the graphite electrode 4. Then, the driving cylinder 7 drives the pressing block 8 to press tightly against the graphite electrode 4, and the pressing block 8 presses against the middle and upper parts of the graphite electrode 4. At this time, under the combined action of the clamping teeth 9 and the pressing block 8, the graphite electrode 4 is tightly surrounded and clamped, and the clamping is more stable. Then, the crane continues to lift to hoist the graphite electrode 4. After hoisting to the designated position, the crane descends, and the graphite electrode 4 contacts the sleeper placed in advance at the storage position. The cylinder 7 drives the pressing block 8 to no longer press against the graphite electrode 4. At the same time, the clamp is stressed and released, and the transmission rod 501 at the upper end of the diamond link mechanism 5 opens outward, and the jaws of the clamping teeth 9 open and separate from the graphite electrode 4, and the fixture of the graphite electrode 4 is removed, and the hoisting ends.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0024] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "set", "connected", "fixed", "swivelly connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The above description shows and describes the preferred embodiments of the present utility model. As previously mentioned, it should be understood that the present utility model is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in the relevant field. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present utility model shall fall within the protection scope of the appended claims of the present utility model.

Claims

1. A graphite electrode lifting fixture, characterized in that: It includes a hanger with a lifting ring. Clamping body are provided at both ends of the hanger. One of the clamping bodies is used to clamp one end of the graphite electrode, and the other clamping body is used to clamp the other end of the graphite electrode. Each clamping body consists of a transmission rod to form a rhombic link mechanism. A clamp is provided at the lower end of the rhombic link mechanism. The clamp includes two symmetrical clamping teeth which are used to contact the middle and lower part of the outer peripheral surface of the graphite electrode. A rotatable pressing block is provided on the clamping tooth. One end of the pressing block is hinged to the clamping tooth, and the other end of the pressing block contacts the middle and upper part of the outer peripheral surface of the graphite electrode. A cylinder for driving it to press the graphite electrode is provided on the pressing block.

2. The graphite electrode lifting fixture according to claim 1, characterized in that: A seat plate is provided at the lower end of the rhombic link mechanism, and the clamping teeth are fixed on the seat plate.

3. The graphite electrode lifting fixture according to claim 2, characterized in that: The cylinder block of the cylinder is hinged to the seat plate, and the piston rod of the cylinder is hinged to the pressing block.

4. The graphite electrode lifting fixture according to claim 1, characterized in that: The surface of the clamping tooth contacting the graphite electrode is set as a first arc surface, and a first rubber layer is provided on the first arc surface.

5. The graphite electrode lifting fixture according to claim 1, wherein: The surface of the pressing block contacting the graphite electrode is set as a second arc surface, and a second rubber layer is provided on the second arc surface.

6. The graphite electrode lifting fixture according to claim 1, characterized in that: The upper cross - over of the rhombic link mechanism is connected by an upper rotating shaft, and the end of the hanger is connected to the upper rotating shaft. The two sides and the lower cross - over of the rhombic link mechanism are respectively connected by lower rotating shafts.

Images