Fastening tool for spherical hinge nut of converter

Abstract

The utility model discloses a fastening tool for a spherical hinge nut of a converter, which belongs to the technical field of steelmaking production and comprises an inner sleeve, an outer sleeve and an actuating mechanism. And an inner hole matched with the nut is formed in the inner sleeve. A torque transmission mechanism is arranged between the inner sleeve and the outer sleeve, a plurality of force bearing blocks are arranged on the outer ring of the outer sleeve in the circumferential direction, and the end faces, in the circumferential direction of the outer sleeve, of the force bearing blocks are force bearing faces. The output end of the executing mechanism abuts against the force bearing face of the force bearing block. When the executing mechanism applies force to the force bearing plate on the outer sleeve, the inner sleeve serves as a transition structure and can transmit torque to the nut. And the force application part for applying force to the outer sleeve is an execution mechanism, so that the manual operation difficulty is reduced. The inner sleeve and the outer sleeve are of a split type, torque is transmitted between the inner sleeve and the outer sleeve through the torque transmission mechanism, the inner sleeve can be kept still after the nut is stressed and rotates by a certain angle, and the stress direction between the force bearing block and the executing mechanism can be readjusted by changing the direction of the outer sleeve.

Description

Technical Field

[0001] The utility model belongs to the technical field of steelmaking production, in particular to a converter ball joint nut fastening tool. Background Art

[0002] The 100T converter furnace body support device in the metallurgical industry mostly uses a ball joint to support the furnace body on the support ring. Each furnace body uses three ball joints for support, and they are evenly arranged on the support ring at 120°. The ball joint is composed of nuts, support bolts, corrugated gaskets, upper spherical pads, upper spherical seats, lower spherical pads, lower spherical seats, pins and other components. At the bottom of the ball joint, the support bolts are connected to the corresponding ear hole seats on the support ring through the pins. The furnace body flange is installed between the upper and lower spherical pads and the upper and lower spherical seats. By tightening the ball joint nuts and compressing the corrugated gaskets, the furnace body is tightened, supported and connected.

[0003] In view of the smelting characteristics of the converter, protective ribs are welded in the surrounding space of the ball joint, and in particular, a U-shaped frame structure is welded around the ball joint component on the upper part of the furnace flange to protect the ball joint from being burned by molten steel and red steel slag. The specification of the ball joint nut is Tr240, and the opposite side dimension is 372mm, which cannot be tightened with a conventional wrench. At present, the tightening method of the ball joint nut is the swing hammer method: that is, a self-made strike wrench is made of steel plate, and then a heavy object is hung to hit the wrench handle to achieve the tightening of the nut. Although this method can tighten the nut to a certain extent, the disadvantage is that the operation is not very convenient, it is difficult to avoid the surrounding ribs for knocking, and the parameter requirements for the tightening of the ball joint nut are difficult to achieve. Utility Model Content

[0004] The utility model aims to provide a converter ball joint nut fastening tool to solve the above-mentioned problems in the prior art.

[0005] Provided is a converter ball joint nut fastening tool, comprising:

[0006] An inner sleeve, wherein the inner sleeve is provided with an inner hole matched with the nut;

[0007] An outer sleeve, wherein the inner ring of the outer sleeve and the outer ring of the inner sleeve can fit each other, a torque transmission mechanism is arranged between the inner sleeve and the outer sleeve, and a plurality of bearing blocks are arranged on the outer ring of the outer sleeve along the circumferential direction, and the end faces of the bearing blocks in the circumferential direction of the outer sleeve are bearing surfaces;

[0008] An actuator, wherein the output end of the actuator abuts against the bearing surface of the bearing block.

[0009] Furthermore, the torque transmission mechanism is formed by splines between the inner sleeve and the outer sleeve, and each spline between the inner sleeve and the outer sleeve is rotationally symmetrical.

[0010] Furthermore, the torque transmission mechanism includes a plurality of slots and a plurality of key pins, wherein the plurality of slots are respectively arranged along the outer circumference of the inner sleeve and the inner circumference of the outer sleeve, and the slots of the inner sleeve overlap with the slots of the outer sleeve to form key slots, and the key pins and key slots can be interlocked.

[0011] Furthermore, the actuator is a thin hydraulic jack.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] When the actuator applies force to the load-bearing plate on the outer sleeve, the inner sleeve, as a transition structure, can transmit torque to the nut, thereby converting the linear force of the actuator into a torsional force that rotates the nut. The actuator is the force-applying party to the outer sleeve, which reduces the difficulty of manual operation. The inner sleeve and the outer sleeve are split, and the torque is transmitted between them through a torque transmission mechanism. After the nut is rotated by a certain angle under force, the inner sleeve can be kept stationary, and the force direction between the load-bearing block and the actuator can be readjusted by changing the direction of the outer sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of a converter ball joint nut fastening tool;

[0016] Figure 2 It is a partial structural schematic diagram of the converter ball joint nut fastening tooling in Example 1;

[0017] Figure 3 This is a partial structural schematic diagram of the converter ball joint nut fastening tooling in Example 2.

[0018] In the figure: 1, inner sleeve; 11, inner hole; 2, outer sleeve; 21, load-bearing block; 3, actuator; 4, torque transmission mechanism; 41, notch; 42, key pin. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3 As shown, in the embodiment of the utility model, a converter ball joint nut fastening tool comprises an inner sleeve 1, an outer sleeve 2 and an actuator 3. The inner sleeve 1 is provided with an inner hole 11 that matches the nut. The inner ring of the outer sleeve 2 and the outer ring of the inner sleeve 1 can fit each other, a torque transmission mechanism 4 is provided between the inner sleeve 1 and the outer sleeve 2, and a plurality of bearing blocks 21 are provided on the outer ring of the outer sleeve 2 along the circumferential direction, and the end surface of the bearing block 21 in the circumferential direction of the outer sleeve 2 is a bearing surface. The output end of the actuator 3 abuts against the bearing surface of the bearing block 21.

[0022] Before tightening the nut, the inner hole 11 on the inner sleeve 1 is put onto the periphery of the nut to match the nut, and then the outer sleeve 2 is put onto the periphery of the inner sleeve 1. The outer sleeve 2 and the inner sleeve 1 are connected by a torque transmission mechanism 4 to limit the freedom of the outer sleeve 2 relative to the inner sleeve 1 in the rotation direction. The actuator 3 is fixed on the rib plate around the nut. After adjusting the angle of the load-bearing block 21, the output shaft extends out to abut against the load-bearing surface of the load-bearing block 21, or an auxiliary block is placed between the output shaft and the load-bearing surface as a structural transition. When tightening the bolts, the output shaft of the actuator 3 continues to extend, providing pressure to the load-bearing block 21, and the load-bearing block 21 drives the outer sleeve 2 to rotate. The outer sleeve 2 transmits torque to the inner sleeve 1 through the torque transmission mechanism 4 to rotate the inner sleeve 1, and the inner sleeve 1 then drives the nut to rotate and tighten.

[0023] In one embodiment, see Figure 2 As shown, the torque transmission mechanism 4 is formed by the splines between the inner sleeve 1 and the outer sleeve 2, and the splines between the inner sleeve 1 and the outer sleeve 2 are rotationally symmetrical. The spline connection can limit the rotation between the inner sleeve 1 and the outer sleeve 2 and transmit torque. The role of the rotational symmetry of each spline is that when the outer sleeve 2 rotates a certain angle under the push of the actuator 3, the surface friction component between the output shaft of the actuator 3 and the load-bearing block 21 is too large, and the pressure is reduced, which is not conducive to the transmission of force. Therefore, the outer sleeve 2 needs to be rotated a certain angle relative to the inner sleeve 1 so that the load-bearing block 21 and the output shaft of the actuator 3 are realigned. At this time, it is necessary to separate the outer sleeve 2 from the inner sleeve 1, and after rotating the outer sleeve 2 a certain angle, realign the spline sleeve to the outer periphery of the inner sleeve 1, so the shape of each spline needs to be adaptable. Repeat the above operation until the nut is tightened.

[0024] In one embodiment, see Figure 3As shown, the torque transmission mechanism 4 includes a plurality of notches 41 and a plurality of key pins 42. The outer ring of the inner sleeve 1 and the inner ring of the outer sleeve 2 are circular, and the two can rotate relative to each other after being fitted. The plurality of notches 41 are arranged along the circumference of the outer ring of the inner sleeve 1 and the circumference of the inner ring of the outer sleeve 2, respectively, so that when the inner sleeve 1 and the outer sleeve 2 rotate relative to each other, the plurality of notches 41 of the two can overlap with each other. The notches 41 of the inner sleeve 1 overlap with the notches 41 of the outer sleeve 2 to form a keyway, and the key pin 42 and the keyway can be fitted with each other.

[0025] When the key pin 42 is inserted into the key slot, the inner sleeve 1 and the outer sleeve 2 cannot rotate relative to each other under the restriction of the key pin 42, so the torque can be transmitted. The advantage of this solution is that when the position between the output shaft of the actuator 3 and the load-bearing block 21 needs to be adjusted, it is only necessary to remove the key pin 42, rotate the outer sleeve 2 so that the load-bearing block 21 is in a suitable position, and then insert the key pin 42 into the key slot, without removing the outer sleeve 2 from the inner sleeve 1 as a whole and then installing it, thereby improving the efficiency of position adjustment.

[0026] Actuator 3 is a thin hydraulic jack. A thin hydraulic jack is a jack in which the cylinder body and the hydraulic mechanism are separated. Therefore, the cylinder body is small in size and suitable for compact spaces. The application scenario of this fastening tool is between the ball joint and the rib plate. Since the width of the U-shaped frame formed by the rib plates around the ball joint nut is only 775mm, it is necessary to ensure the normal rotation of the wrench and the normal clamping of the jack in this space. Therefore, the maximum outer diameter of the inner sleeve 1 of the ratchet split fastening wrench is set to not exceed 530mm, the outer diameter of the outer sleeve 2 at the widest point is not more than 750mm, the outer diameter at the narrowest point is not more than 600mm, and the thickness is not more than 85mm. The thin hydraulic jack is suitable for this narrow environment.

[0027] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A converter ball joint nut fastening tool, characterized in that: include: An inner sleeve (1), wherein the inner sleeve (1) is provided with an inner hole (11) that cooperates with the nut; An outer sleeve (2), wherein the inner ring of the outer sleeve (2) and the outer ring of the inner sleeve (1) can fit each other, a torque transmission mechanism (4) is provided between the inner sleeve (1) and the outer sleeve (2), and the outer ring of the outer sleeve (2) is provided with a plurality of bearing blocks (21) along the circumferential direction, and the end faces of the bearing blocks (21) in the circumferential direction of the outer sleeve (2) are bearing surfaces; An actuator (3), wherein the output end of the actuator (3) abuts against the bearing surface of the bearing block (21).

2. A converter ball joint nut fastening tool according to claim 1, characterized in that: The torque transmission mechanism (4) is formed by splines between the inner sleeve (1) and the outer sleeve (2), and each spline between the inner sleeve (1) and the outer sleeve (2) is rotationally symmetrical.

3. The converter ball joint nut fastening tool according to claim 1, characterized in that: The torque transmission mechanism (4) comprises a plurality of notches (41) and a plurality of key pins (42), wherein the plurality of notches (41) are arranged along the outer circumference of the inner sleeve (1) and the inner circumference of the outer sleeve (2), respectively; the notches (41) of the inner sleeve (1) overlap with the notches of the outer sleeve (2) to form a key slot, and the key pins (42) and the key slot can be interlocked.

4. The converter ball joint nut fastening tool according to claim 1, characterized in that: The actuator (3) is a thin hydraulic jack.

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