A horizontal arm clamping device for electrodes of an electric arc furnace

Abstract

This utility model discloses a horizontal arm clamping device for electric arc furnace electrodes, including a horizontal arm housing, a clamping ring mechanism, a pull rod, and a hydraulic cylinder. The horizontal arm housing is provided with a hydraulic cylinder assembly cavity and a pull rod assembly cavity. The pull rod includes a head end that passes through the pull rod assembly cavity and connects to the hydraulic cylinder, and a connecting part that extends out of the horizontal arm housing and connects to the clamping ring mechanism. The hydraulic cylinder is installed in the middle of the hydraulic cylinder assembly cavity. An annular cover is provided on the cylinder cover side of the hydraulic cylinder. The outer periphery of the annular cover is engaged in an annular groove on the inner wall of the hydraulic cylinder assembly cavity. This application assembles the hydraulic cylinder in the middle of the hydraulic cylinder assembly cavity, reducing the length of the pull rod head end, reducing the overall weight of the pull rod, reducing energy consumption, and effectively reducing costs.

Description

Technical Field

[0001] This utility model relates to the technical field of electrode clamping equipment for electric arc furnaces in steelmaking, and in particular to a horizontal arm clamping device for electric arc furnace electrodes. Background Technology

[0002] In the electric arc furnace steelmaking process, the electrodes are clamped and fixed by a clamping device. Existing clamping devices (reference) Figure 1 The structure is as follows: the transverse arm housing 10 is internally divided into a cylinder assembly cavity 11 and a pull rod assembly cavity 12. The end head 31 of the pull rod 30 is located in the pull rod assembly cavity 12 and connected to the cylinder 40 located in the cylinder assembly cavity 11. The connecting part 32 of the pull rod 30 is connected to the retaining ring mechanism 20, which clamps the electrode 70. A butterfly spring 60 is sleeved on the outer periphery of the part of the end head 31 inside the pull rod assembly cavity 12. The problem with this structure is:

[0003] 1. During use, the locking nut 33 at the end of the connecting part 32 of the pull rod 30 is prone to falling off.

[0004] 2. The two ends of the disc spring 60, which is sleeved on the outer periphery of the end 31 of the pull rod 30, are prone to wear, which will affect the accuracy of the stroke.

[0005] 3. The end head 31 of the pull rod 30 is connected to the hydraulic cylinder 40. Since the hydraulic cylinder 40 is assembled on the right side of the hydraulic cylinder assembly cavity 11, the end head 31 of the pull rod 30 is relatively long, resulting in a high cost for the pull rod 30. Furthermore, the longer end head 31 makes the pull rod 30 heavier, leading to higher energy consumption when the hydraulic cylinder 40 is working. Utility Model Content

[0006] The purpose of this invention is to provide a horizontal arm clamping device for electrodes of an electric arc furnace.

[0007] The innovation of this utility model is that the hydraulic cylinder is assembled in the middle of the hydraulic cylinder assembly cavity, which reduces the length of the end of the pull rod, reduces the overall weight of the pull rod, reduces energy consumption, and effectively reduces costs.

[0008] To achieve the aforementioned objectives, the technical solution of this utility model is as follows:

[0009] A horizontal arm clamping device for an electric arc furnace electrode includes a horizontal arm housing, a retaining ring mechanism, a pull rod, and a hydraulic cylinder. The horizontal arm housing has a hydraulic cylinder assembly cavity and a pull rod assembly cavity. The pull rod includes a head end that passes through the pull rod assembly cavity and connects to the hydraulic cylinder, and a connecting part that extends out of the horizontal arm housing and connects to the retaining ring mechanism. A locking nut is provided at the end of the connecting part. Several pin holes are evenly distributed circumferentially on the end face of the locking nut, and pins are inserted into the pin holes. The hydraulic cylinder is installed in the middle of the hydraulic cylinder assembly cavity. A ring cover is provided on the cylinder cover side of the hydraulic cylinder. The outer periphery of the ring cover is engaged in an annular groove on the inner wall of the hydraulic cylinder assembly cavity. The ring cover includes an outer conical ring and an inner conical ring arranged coaxially. The outer conical ring is located on the outer periphery of the inner conical ring, and the outer and inner conical rings are connected to the cylinder cover of the hydraulic cylinder by multiple connecting bolts. The outer conical ring is formed by splicing at least three outer ring pieces of the same shape and size circumferentially.

[0010] Furthermore, wear-resistant pads are provided between the two ends of the disc spring sleeved on the outer periphery of the end of the pull rod and the cavity wall of the pull rod assembly cavity inside the pull rod assembly cavity.

[0011] Furthermore, an explosion-proof valve is also integrated into the cylinder head of the hydraulic cylinder.

[0012] Furthermore, the number of pin holes is 4-6.

[0013] Furthermore, the number of outer ring pieces is 3-6.

[0014] The beneficial effects of this utility model are:

[0015] First: This application provides a pin hole on the end face of the lock nut, and a pin is installed in the pin hole to prevent the lock nut from loosening.

[0016] Second: This application provides a split ring cover (outer conical ring and inner conical ring) on ​​the cylinder head side of the hydraulic cylinder. The outer periphery of the ring cover is engaged in the annular groove on the inner wall of the hydraulic cylinder assembly cavity. The ring cover is connected to the cylinder head of the hydraulic cylinder, fixing the hydraulic cylinder in the middle of the hydraulic cylinder assembly cavity. This effectively reduces the length of the tie rod end, reduces the overall weight of the tie rod, reduces energy consumption, and effectively reduces costs.

[0017] Third: To facilitate assembly, the ring cover is designed as an outer conical ring and an inner conical ring. The outer conical ring is designed as a block structure, which makes it easy to insert into the annular groove on the inner wall of the cylinder assembly cavity during installation.

[0018] Fourth: Installing anti-wear pads can effectively reduce the wear of the disc spring. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the existing horizontal arm clamping device for electric arc furnace electrodes.

[0020] Figure 2 This is a schematic diagram of the structure of this utility model.

[0021] Figure 3 for Figure 2 Enlarged view of section A.

[0022] Figure 4 for Figure 2 Enlarged view of section B in the middle.

[0023] Figure 5 This is a schematic diagram of the outer conical ring structure.

[0024] Figure 6 This is a side view of the outer and inner conical rings.

[0025] In the diagram: 10 is the crossarm housing, 11 is the cylinder assembly cavity, 12 is the tie rod assembly cavity, 20 is the retaining ring mechanism, 30 is the tie rod, 31 is the end head, 32 is the connecting part, 33 is the lock nut, 34 is the pin hole, 35 is the pin shaft, 40 is the cylinder, 41 is the cylinder head, 42 is the explosion-proof valve, 50 is the ring cover, 51 is the outer conical ring, 51.1 is the outer ring plate, 52 is the inner conical ring, 60 is the butterfly spring, 61 is the anti-wear pad, and 70 is the electrode. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will now be clearly and completely described with reference to the accompanying drawings.

[0027] A horizontal arm clamping device for an electric arc furnace electrode includes a horizontal arm housing 10, a clamping ring mechanism 20, a pull rod 30, and a hydraulic cylinder 40. The horizontal arm housing 10 contains a hydraulic cylinder assembly cavity 11 and a pull rod assembly cavity 12. The pull rod 30 includes a head 31 that passes through the pull rod assembly cavity 11 and connects to the hydraulic cylinder 40, and a connecting portion 32 that extends out of the horizontal arm housing 10 and connects to the clamping ring mechanism 20. A locking nut 33 is provided at the end of the connecting portion 32. Several pin holes 34 are evenly distributed circumferentially on the end face of the locking nut 33, and pins are inserted into the pin holes 34. 35; The hydraulic cylinder 40 is installed in the middle of the hydraulic cylinder assembly cavity 11; A ring cover 50 is provided on the cylinder head side of the hydraulic cylinder 40; The outer periphery of the ring cover 50 is engaged in the annular groove on the inner wall of the hydraulic cylinder assembly cavity 11; The ring cover 50 includes an outer conical ring 51 and an inner conical ring 52 arranged coaxially; The outer conical ring 51 is located on the outer periphery of the inner conical ring 52, and the outer conical ring 51 and the inner conical ring 52 are connected to the cylinder head 41 of the hydraulic cylinder 40 by a plurality of connecting bolts; The outer conical ring 51 is formed by splicing together at least three outer ring pieces 51.1 of the same shape and size along the circumference.

[0028] Furthermore, wear-resistant pads 61 are provided between the two ends of the butterfly spring 60 sleeved on the outer periphery of the end head 31 of the pull rod 30 and the cavity wall of the pull rod assembly cavity 12, which can effectively reduce the wear of the butterfly spring 60.

[0029] Furthermore, an explosion-proof valve 42 is also integrated on the cylinder head 41 of the hydraulic cylinder 40.

[0030] Furthermore, the number of pin holes 34 is 4-6.

[0031] Furthermore, the number of the outer ring pieces 51.1 is 3-6 pieces.

[0032] The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A horizontal arm clamping device for an electric arc furnace electrode, comprising a horizontal arm housing (10), a clamping ring mechanism (20), a pull rod (30), and a hydraulic cylinder (40); the horizontal arm housing (10) is provided with a hydraulic cylinder assembly cavity (11) and a pull rod assembly cavity (12); the pull rod (30) includes an end head (31) that passes through the pull rod assembly cavity (12) and connects to the hydraulic cylinder (40) and a connecting part (32) that extends out of the horizontal arm housing (10) and connects to the clamping ring mechanism (20), characterized in that: The end of the connecting part (32) is provided with a locking nut (33); several pin holes (34) are evenly opened along the circumference on the end face of the locking nut (33), and a pin (35) is inserted into the pin hole (34). The hydraulic cylinder (40) is installed in the middle of the hydraulic cylinder assembly cavity (11); an annular cover (50) is provided on the cylinder head side of the hydraulic cylinder (40); the outer periphery of the annular cover (50) is engaged in the annular groove on the inner wall of the hydraulic cylinder assembly cavity (11); the annular cover (50) includes an outer conical ring (51) and an inner conical ring (52) arranged coaxially; the outer conical ring (51) is located on the outer periphery of the inner conical ring (52), and the outer conical ring (51) and the inner conical ring (52) are connected to the cylinder head (41) of the hydraulic cylinder (40) by multiple connecting bolts; the outer conical ring (51) is formed by splicing together at least three outer ring pieces (51.1) of the same shape and size along the circumferential direction.

2. A cross-arm electrode holder for an arc furnace as defined in claim 1, characterized in that: Inside the tie rod assembly cavity (12), wear-resistant pads (61) are provided between the two ends of the butterfly spring (60) sleeved on the outer periphery of the end head (31) of the tie rod (30) and the cavity wall of the tie rod assembly cavity (12).

3. A cross-arm electrode holder for an arc furnace as defined in claim 1, characterized in that: An explosion-proof valve (42) is also integrated on the cylinder head (41) of the oil cylinder (40).

4. A cross-arm electrode holder for an arc furnace as defined in claim 1, characterized in that: The number of pin holes (34) is 4-6.

5. A cross-arm electrode holder for an arc furnace as defined in claim 1, characterized in that: The number of outer ring pieces (51.1) is 3-6.

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