An open jaw locking device for an opening machine

Abstract

The application discloses an opening machine claw locking device, which comprises a handle, a first sleeve, a second sleeve and a spring. The handle is hinged to the first end of a sliding rod provided with surface threads. An adjusting nut is arranged on the threads. The second end of the sliding rod is inserted into the inner side of the first sleeve and can slide along the axial direction. A through hole for inserting the first sleeve is arranged on the bottom of the second sleeve. The spring is arranged between the two sleeve bodies along the radial direction. One end of the spring is connected to the adjusting nut, and the other end is abutted against the inner side end of the bottom of the second sleeve. One end of the first sleeve close to the bottom side extends out of the second sleeve along the axial direction. A pair of radial outward coaxial first trunnions are arranged at the end of the first sleeve. The first sleeve is positioned on a base through the first trunnions. A pair of radial outward coaxial second trunnions are arranged at the opening end of the second sleeve. A pair of connecting rods are symmetrically arranged on the opposite sides of the second sleeve. The first ends of the connecting rods are respectively hinged to the coaxial trunnion holes on a pair of bases. The second ends of the connecting rods are respectively hinged to the second trunnions.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of opening machine clamping jaw locking device for large blast furnace tapping opening machine. BACKGROUND

[0002] Opening machine is the key equipment in blast furnace production, and the front clamping jaw of opening machine is mainly used to fix the front part of drill rod, referring to Figure 1 And Figure 2 , the drawing shows the clamping jaw drive rod 101, opening machine drill rod 102, front clamping jaw 103 and clamping jaw drive cylinder 104 and other components. When the blast furnace is tapped, the opening machine rotates from standby position to the top of iron mouth, and the track beam starts to descend. When the hook is hung in place, the track beam stops descending. The drill rod for opening is aligned with the center of the iron mouth under the control of the clamping jaw. The striking machine and rotating mechanism of the opening machine start to work. Under the action of striking and rotating, the drill rod can smoothly enter the iron mouth passage, and the blast furnace can smoothly flow out from the passage.

[0003] The above prior art has the following defects:

[0004] After the opening machine is stopped in standby position for a period of time, the gripping force of the front clamping jaw decreases. When the opening machine girder rotates to the top of the iron mouth, the front clamping jaw will automatically open under the gravity of the drill rod. The drill rod falls from the clamping jaw, so that the drill rod cannot be aligned with the iron mouth, thereby affecting the normal tapping of the blast furnace.

[0005] In the prior art, the drill rod falls from the front clamping jaw during driving and fixing of the front clamping jaw, which causes the drill rod to fall and cannot be aligned with the iron mouth during opening of the opening machine, and other problems, so that the response speed of the opening machine during tapping is slow, and the labor intensity of production operation and equipment wear are increased.

[0006] The clamping jaw installed in the front part of the opening machine automatically opens under the gravity of the drill rod, so that the drill rod cannot be aligned with the iron mouth, and the opening machine is forced to retreat and reinstall the drill rod. This failure often occurs, which affects the normal tapping of the blast furnace and prolongs the tapping time, causing equipment wear and energy loss, and also increases the labor intensity of production operators and the consumption of spare parts. SUMMARY

[0007] The technical problem to be solved by the present application is to overcome the above-mentioned shortcomings of the prior art, and to provide an opening machine clamping jaw locking device which can lock the front clamping jaw of the opening machine and avoid self-loosening, so as to ensure that the drill rod of the opening machine is firmly locked in the clamping jaw.

[0008] The technical problem to be solved can be solved by the following technical scheme.

[0009] An opening machine clamping jaw locking device, characterized in that it comprises:

[0010] a handle, one end of which is operable to drive the claw, the other end of which is hingedly connected to a first end of a sliding rod, a surface thread being formed on a part or all of the rod body of the sliding rod, an adjusting nut being threadedly connected to the surface thread, a second end of the sliding rod being inserted into and axially slidably arranged in an inner side of a cylinder wall of a first sleeve, and

[0011] a second sleeve being sleeved on an outer side of the first sleeve, a first end of the second sleeve being an open end, a second end of the second sleeve being provided with a cylinder bottom, a through hole being formed in the cylinder bottom for sleeving the cylinder body of the first sleeve, and

[0012] a spring being sleeved on the cylinder body of the first sleeve, the spring being located between the cylinder body of the second sleeve and the cylinder body of the first sleeve in a radial direction, a first end of the spring being connected to the adjusting nut, and a second end of the spring abutting against an inner side end of the cylinder bottom of the second sleeve;

[0013] an end of the first sleeve close to the cylinder bottom extending axially out of the second sleeve, the end being provided with a pair of coaxial first trunnions extending radially outwards, the first sleeve being positioned in a group of shaft holes provided in a base through the pair of first trunnions;

[0014] the open end of the second sleeve being provided with a pair of coaxial second trunnions extending radially outwards;

[0015] a pair of force adding connecting rods being symmetrically arranged on opposite sides of the second sleeve, corresponding first ends of the pair of force adding connecting rods being hingedly connected to a pair of coaxial and symmetrically arranged trunnion holes provided in the base, and corresponding second ends of the pair of force adding connecting rods being hingedly connected to the second trunnions.

[0016] As a further improvement of the technical solution, the shaft holes are open shaft holes.

[0017] Further, the open ends of the open shaft holes are towards the handle side.

[0018] Also as a further improvement of the technical solution, the second end of the sliding rod is selectively extended out of or retracted into the inner side of the cylinder wall of the first sleeve.

[0019] Also as a further improvement of the technical solution, the handle is hingedly connected to the first end of the sliding rod through a bolt.

[0020] Further, the base is positioned on an open machine girder.

[0021] Also further, the adjusting nut is threadedly positioned on the surface thread of the sliding rod outside the first sleeve.

[0022] Also further, one end of the handle is welded to the claw driving rod.

[0023] Preferably, the through hole is a circular hole.

[0024] The open machine claw automatic locking device provided by the application utilizes the spring force to increase the gripping force of the front claw, utilizes two different concentric circular motions to increase the spring pressure, utilizes the combination of the force link and the second sleeve to drive the spring compression, solves the problem of spring force loss caused by the handle rotation, keeps the gripping force of the front claw in the clamping state under the action of the spring force, can firmly fix the open machine drill rod in the claw, and can ensure that the drill rod is accurately aligned with the center of the mouth. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic view of the prior art open machine front claw fixing drill rod;

[0026] Figure 2 is a side view of Figure 1 ;

[0027] Figure 3 is a structural schematic view of the open machine claw locking device of the application;

[0028] Figure 4 is a left view of Figure 3 ;

[0029] Figure 5 is a top view of Figure 3 ;

[0030] Figure 6 is a perspective view of Figure 3 ;

[0031] Figure 7 is a sectional view of Figure 3 ;

[0032] Figure 8 is an exploded view of the structural schematic view of the mutual combination of the first sleeve and the base of the application;

[0033] Figure 9 is an assembly view of the structural schematic view of the mutual combination of the first sleeve and the base of the application;

[0034] Figure 10 is a front view of the structural schematic view of the second sleeve of the application;

[0035] Figure 11 is a sectional view of the structural schematic view of the second sleeve of the application;

[0036] Figure 12 is a perspective view of the structural schematic view of the second sleeve of the application;

[0037] Figure 13 Variation structure diagram of the opening machine claw locking device of the present application;

[0038] Figure 14 For Figure 13 F-F section view;

[0039] Figure 15 For the installation structure diagram of the base, the second sleeve and the force adding connecting rod of the present application is the exploded view;

[0040] Figure 16 For the installation structure diagram of the base, the second sleeve and the force adding connecting rod of the present application is the assembled view;

[0041] Figure 17 For the installation connection diagram of the opening machine claw locking device and the opening machine beam and the driving rod of the present application;

[0042] Figure 18 For Figure 17 The spring force locking diagram after the claw is closed;

[0043] In the figure: 101 - claw driving rod 102 - opening machine drill rod 103 - front claw 104 - claw driving oil cylinder

[0044] 1 - first sleeve 11 - first trunnion 2 - base 21 - opening shaft hole 22 - trunnion hole

[0045] 3 - sliding rod 4 - handle 5 - adjusting nut 6 - latch 7 - spring 8 - second sleeve 81 - second trunnion 82 - through hole 83 - sleeve bottom 9 - force adding connecting rod

[0046] 210 - opening machine beam 220 - claw driving rod DETAILED DESCRIPTION

[0047] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0048] Referring to Figures 3 to 18 , the opening machine claw automatic locking device of the present application is mainly composed of a first sleeve 1 (spring sleeve), a base 2 (base), a sliding rod 3, a handle 4, an adjusting nut 5, a latch 6, a spring 7, a second sleeve 8 (force adding sleeve) and a force adding connecting rod 9.

[0049] The working principle of the present application is as follows

[0050] The application utilizes the technical principle that the force transmission direction can be changed after the rotation of the crank connecting rod mechanism, and utilizes the function that the spring can store elastic force, and organically combines the two features together to form a set of open machine claw automatic locking device.

[0051] The structure and connection relationship of each component are as follows:

[0052] Through the measurement of the installation position of the open machine beam, the width of the open machine beam is 425mm, we select the spring 7 with a wire diameter of 6mm, an outer diameter of 52mm and a free length of 180mm, which can generate a driving force of 120kg after being compressed.

[0053] The length of the handle 4 is selected to be 230mm, one end is welded on the claw driving rod A, and the other end is designed with a d16mm round hole, which is hingedly connected with the sliding rod 3 through the bolt 6 (see Figure 13 and Figure 14 ).

[0054] The sliding rod 3 is designed with threads, and the adjusting nut 5 is installed on the sliding rod 3.

[0055] One end of the sliding rod 3 is hingedly connected with the handle 4 through the bolt 6, and the other end of the sliding rod 3 is inserted into the inner circle (the inner side of the cylinder) of the first sleeve 1 and can slide forward and backward along the inner circle of the first sleeve 1 (see Figure 13 and Figure 14 ).

[0056] The bottom of the first sleeve 1 is made of two first trunnions 11, which are respectively installed on the two sides of the bottom at an angle of 180°. The two first trunnions 11 on the first sleeve 1 are respectively inserted into the two opening shaft holes 21 on the base 2 and can rotate around the shaft holes (see Figure 15 and Figure 16 ).

[0057] The bottom of the second sleeve 8 is provided with a circular hole (through hole 82) with a diameter of 40mm, and the upper outer side is respectively provided with two second trunnions 81 at an angle of 180° (see Figures 10 to 12 ).

[0058] A spring 7 with an outer diameter of 50mm can be inserted into the inside of the second sleeve 8 (see Figure 7 and Figure 14 ), one end abuts against the inner side of the cylinder bottom 83 of the sleeve, and the other end is connected with the adjusting nut 5. The elastic force can be adjusted by rotating the adjusting nut 5.

[0059] The outer circle (the outer side of the cylindrical body) of the first sleeve 1 is sequentially installed (sleeved) with the spring 7 and the second sleeve 8. The second sleeve 8 is installed outside the first sleeve 1 and can move along the axial direction of the first sleeve 1, and at the same time drives the spring 7 to move along the axial direction of the first sleeve 1 (see Figure 13and Figure 14 ).

[0060] The upper part of the base 2 is designed with two embedded opening shaft holes 21, and the first trunnion 11 on the first sleeve 1 is inserted into the opening shaft hole 21 along the opening direction of the shaft hole of the base 2 (see Figure 15 and Figure 16 ).

[0061] The middle two sides of the base 2 are made with outward protruding trunnion holes 22 for installing the force adding connecting rod 9.

[0062] One end of the force adding connecting rod 9 is hinged with a second trunnion 81 on the second sleeve 8, and the other end is hinged with the middle outward protruding trunnion hole 22 on the base 2 (see Figure 15 and Figure 16 ).

[0063] The base 2 is welded on the opening machine girder 210 ( Figure 17 ).

[0064] The installation requirements and principles of the spring locking device are as follows:

[0065] When installing the spring locking device, first open the front grab claw of the opening machine, weld one end of the handle 4 on the grab claw driving rod 220, and weld the base 2 on the opening machine girder 210 ( Figure 17 ), then we rotate the spring force adjusting nut 5 clockwise, compress the spring to 140mm length, at this time the spring force can produce 120kg, at this time the action direction of the spring force ( Figure 17 the spring force direction indicated by the arrow in the middle) can make the handle 4 rotate counterclockwise with the shaft core of the grab claw driving rod 220 as the center, and the spring force can lock the grab claw in the open position. When closing the grab claw, the hydraulic cylinder drives the grab claw driving rod 220 to rotate, and the grab claw driving rod 220 drives the handle 4 to rotate clockwise by 25 degrees with the shaft core of the grab claw driving rod 220 as the center, and through the hinged bolt shaft (i.e. the bolt 6), the sliding rod 3 is driven to rotate counterclockwise with the embedded opening shaft hole (i.e. the opening shaft hole 21) above the base 2 as the center, when the grab claw is closed to the position, due to the rotation of the sliding rod 3, the action direction of the spring force changes, and the spring force can make the handle 4 rotate clockwise with the shaft core of the grab claw driving rod 220 as the center, so that the spring force acts on the grab claw through the handle 4 and the grab claw driving rod 220, and the grab claw cannot be opened automatically.

[0066] In the sliding rod 3 in the base 2 above the embedded opening shaft hole (i.e. opening shaft hole 21) as the center of the counterclockwise rotation also brought the second sleeve 8 in the base 2 above the embedded opening shaft hole as the center of the counterclockwise rotation, and the second sleeve 8 upper outside two second trunnions 81 in the role of two force link 9 as the base 2 in the middle of two side convex trunnion hole 22 as the center of the counterclockwise rotation, because the two centers exist 30mm distance, so the second sleeve 8 in the counterclockwise rotation while also along the sliding rod 3 axial forward slip 15mm, while the second sleeve 8 also brought the spring 7 one end to the inside compression of 15mm, increase the spring force, make up for the spring force loss caused by the handle 4 clockwise rotation angle larger (see Figure 18 ).

[0067] In practical application we can adjust the spring force adjusting nut 5 to make the best state of the claw clamping force ( Figure 17 ). The device has been applied in three high furnace opening machine, after the actual test proved good effect, the opening machine open the response time of the iron mouth greatly shortened, reduced the labor intensity of production operation workers.

[0068] The spring locking technology through the actual use and test effect is very good, after the application of spring locking technology, eliminate the drill pipe from the claw off the problem, greatly improve the response speed of the opening machine opening, the spring locking technology has high production efficiency. After the use of the spring locking technology, various spare parts material consumption also significantly reduced, especially the front claw drive oil cylinder spare parts consumption significantly reduced, save new product procurement and spare parts repair cost of about 60,000 yuan. The spring device technology can also be used in other high furnace opening machine, has broad application prospect.

Claims

1. An open jaw locking device for an open jaw gripper, characterized in that, The utility model relates to a kind of mechanical arms, comprising: A handle (4) can act on gripper drive rod (220) one end, the other end of the handle is hinged to the first end of a sliding rod (3), the rod body of the sliding rod is partially or entirely provided with continuous surface thread, a adjusting nut (5) is threadedly connected on the surface thread, the second end of the sliding rod (3) is inserted into the inner side of the barrel wall of a first sleeve (1) and can be axially relatively slid along the barrel wall;And A second sleeve (8) is stacked outside the first sleeve, the first end of the second sleeve is open end, the second end is provided with a barrel bottom (83), a through hole (82) is formed in the barrel bottom, which facilitates the insertion of the barrel of the first sleeve, and A spring (7) is connected to the barrel of the first sleeve, radially, the spring is located between the barrel of the second sleeve and the barrel of the first sleeve, the first end of the spring is connected to the adjusting nut, and the second end of the spring abuts against the inner side end of the barrel bottom (83) of the second sleeve; The end of the first sleeve close to the barrel bottom (83) side extends axially outside the second sleeve, and a pair of coaxial first trunnions (11) are provided at the end, which are radially outward, and the first sleeve is positioned in a group of shaft holes provided in a base (2) through the pair of first trunnions; The open end of the second sleeve is provided with a pair of coaxial second trunnions (81) radially outward; It also includes a pair of force amplification connecting rods (9), which are respectively and symmetrically arranged on opposite sides of the second sleeve, and the corresponding first ends of the pair of force amplification connecting rods are respectively hinged to a pair of coaxial and symmetrically arranged trunnion holes (22) on the base, and the corresponding second ends are respectively hinged to the second trunnions.

2. The opening machine gripper locking device according to claim 1, characterized in that The shaft hole is an open shaft hole.

3. The opening machine gripper locking device according to claim 2, characterized in that The opening of the open shaft hole faces the handle (4) side.

4. The opening machine gripper locking device of claim 1, wherein The second end of the sliding rod (3) can be selectively extended or retracted into the inner side of the barrel wall of the first sleeve.

5. The opening machine gripper locking device of claim 1, wherein The handle (4) is hinged to the first end of the sliding rod (3) through a bolt (6).

6. The opening machine gripper locking device of claim 1, wherein The base (2) is positioned on the opening machine girder (210).

7. The opening machine gripper locking device of claim 1, wherein The adjusting nut (5) is threadedly positioned on the surface thread of the sliding rod outside the first sleeve.

8. The opening machine gripper locking device according to claim 1 or 6, characterized in that One end of the handle (4) is welded to the gripper drive rod (220).

9. The opening machine gripper locking device of claim 1, wherein, The through hole (82) is a circular hole.

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