An assembly method for a combined rest device applied to a boom and a hook

Abstract

The application provides an assembling method of a combined rest device applied to a boom and a hook, which comprises the following steps of: determining the position of a rack, welding and fixing the rack on a ship deck, welding a supporting platform on one side of the rack and welding an installation platform on the top of the rack, welding a boom rest frame on the installation platform vertically, and making the axis of the opening on the bracket and the horizontal straight line through the center of the installation platform in the same vertical plane, welding a hook rest frame on the supporting platform with the vertical plane as a reference, and making the axis of the bracket and the axis of the inclined surface of the first support in the same vertical plane, so that the boom can change the angle in the vertical plane, the hook can be accurately lowered to the inclined surface of the first support to complete the rest, and the boom can fall into the boom rest frame.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cranes, in particular to an assembly method of a combined rest device applied to a boom and a hook. BACKGROUND

[0002] Large cranes are usually arranged on the deck of a large engineering ship. Generally, the hook of the crane is controlled to lift large heavy cargo. When the boom and the hook are not used to lift cargo, the boom and the hook need to be rested on the ship to prevent the boom and the hook from swinging at a large angle due to wind and waves during the sailing of the ship. In order to better rest the boom and the hook, the rest device needs to be accurately assembled so that the boom and the hook can be reasonably matched with the rest device.

[0003] For example, a patent document with the Chinese patent application number 202211077388.6 and the publication date of November 1, 2022 discloses a method for installing a crane rest and hook box integrated structure and a ship outer plate, which includes the following steps: S1, pre-assemble the cross pipe and the elbow plate of the crane rest and hook box integrated structure on the ground, then move the elbow plate away from the cross pipe; S2, install a stop block on the ship outer plate as an inner side fulcrum; S3, increase a support seat on the outer side of the crane rest and hook box integrated structure as an outer side fulcrum; S4, weld the weld joint between the elbow plate and the ship outer plate; S5, contract the threaded pull rod to make the crane rest and hook box integrated structure slide to the cross pipe to contact the ship outer plate; S6, weld the weld joint between the cross pipe and the main ship outer plate, and the weld joint between the cross pipe slot and the elbow plate, and complete the welding of the crane rest and hook box main body; S7, remove the support seat.

[0004] The above document discloses a method for installing a crane rest and hook box integrated structure and a ship outer plate, which makes the connection between the crane rest and hook box integrated structure and the ship outer plate more stable. However, when the hook is rested, the hook will constantly swing, making it difficult for the operator to quickly put the hook into the hook box. Therefore, other rest devices need to be used to rest the hook. In order to reasonably match the boom and the hook with the rest device, the rest device needs to be accurately and reasonably assembled. SUMMARY

[0005] The present application aims to provide an assembly method of a combined rest device applied to a boom and a hook, which can accurately rest the hook and the boom, and the method is simple and practical.

[0006] To achieve the above-mentioned purpose, an assembly method of a combined rest device applied to a boom and a hook includes the following steps:

[0007] S1, determine the position of the rack on the ship deck, then fixedly weld the bottom of the rack on the ship deck;

[0008] S2 welding a support platform on one side of the rack, making the support platform perpendicular to the vertical axis of the rack, and then welding a fixed rod between the rack and the support platform;

[0009] S3 welding an installation platform on the top of the rack, making the installation platform parallel to the installation surface of the deck;

[0010] S4 welding a boom rest on the installation platform, making the bracket perpendicular to the installation platform and the axis of the opening on the bracket being in the same vertical plane with the horizontal straight line passing through the center of the installation platform;

[0011] S5 taking the vertical plane in step S4 as a reference, drawing a straight line intersecting the plane where the support platform is located, and then measuring the width of the first bracket and the second bracket and the distance between the flush ends of the first bracket and the second bracket;

[0012] S6 taking the intersecting straight line in step S5 as a reference, drawing a first straight line perpendicular to the intersecting straight line on the plane where the support platform is located, and then drawing a certain point on the first straight line with the intersection point as the starting point, making the distance between the intersection point and the certain point equal to half of the width of the first bracket, and then drawing the symmetric point of the certain point on the first straight line with the intersecting straight line as the axis of symmetry, obtaining the fixed point position of the first bracket on the support platform;

[0013] S7 repeating step S6 to draw a second straight line, making the distance between the first straight line and the second straight line equal to the distance between the flush ends of the first bracket and the second bracket, and obtaining the fixed point position of the second bracket on the support platform;

[0014] S8 placing the assembled hook rest on the fixed point position of the support platform, and welding and fixing the first bracket and the second bracket.

[0015] The above method ensures that the axis of the bracket and the axis of the inclined surface of the first bracket are in the same vertical plane, so that when the hook is positioned above the hook rest through the boom luffing, the boom is also positioned in the vertical plane, and the hook can be accurately lowered onto the inclined surface of the first bracket to complete the resting, and the boom can fall into the boom rest.

[0016] Further, step S1 further includes taking the center of the rotary platform base as a reference point, and then setting a rack position installation point on the horizontal straight line passing through the reference point, making the distance between the reference point and the installation point equal to 2 / 3 of the length of the boom.

[0017] The above arrangement facilitates the measurement of the distance between the step and the rotating platform, thereby facilitating the installation of the rack. Furthermore, the vertical axis of the rack coincides with the installation point.

[0018] The above arrangement ensures that the center of the rack and the center of the rotating platform are in the same plane, thereby ensuring that the boom is accurately placed on the rack.

[0019] Furthermore, step S2 also includes placing the lifting platform on the installation surface where the installation point is located, then placing the support platform on the lifting platform, lifting the support platform to the required height through the lifting platform, then welding one end of the support platform to the rack, welding the fixing rod at the other end of the support platform, and finally welding the fixing rod to the rack.

[0020] The above arrangement ensures that the vertical axis of the support platform and the rack is perpendicular after welding.

[0021] Furthermore, step S3 also includes making the axis of the installation platform and the horizontal straight line passing through the reference point in the same vertical plane.

[0022] The above arrangement enables the boom to be accurately lowered onto the cradle of the installation platform after the boom is aligned with the straight line where the rack is located.

[0023] Furthermore, step S4 also includes making a third straight line perpendicular to the axis of the opening on the cradle in the plane where the cradle is located, determining the angle between the third straight line and the axis of the bracket based on the angle between the axis of the bracket and the axis of the opening, then measuring the distance between the bracket and the axis of the opening on the cradle to determine the inclination angle of the bracket, then fixing the bracket on the cradle, and finally installing the roller set on the bracket.

[0024] The above arrangement enables the boom lowered into the opening to be connected through the roller set, reducing the noise generated by friction and the wear of the boom. Since the bracket is inclined inward and downward in the direction of the axis of the opening, the rolling friction generated when the boom is subjected to external force causes the boom to move downward and inward into the bracket, reducing the possibility of the boom moving outward when subjected to external force, thereby slowing down the movement of the boom in the direction of the axis of the opening and making the boom rest more stably. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 This is a schematic diagram of the boom and hook resting in the present application.

[0026] Figure 2 This is a front view of the boom resting rack in the present application.

[0027] Figure 3 The top view of the boom rest in the present application.

[0028] Figure 4 The side view of the boom rest in the present application.

[0029] Figure 5 The side view of the roller device in the present application.

[0030] Figure 6 The top view of the roller device in the present application.

[0031] Figure 7 The front view of the roller device in the present application.

[0032] Figure 8 The Figure 2 The enlarged view of A in the present application.

[0033] Figure 9 The side view of the hook rest in the present application.

[0034] Figure 10 The front view of the hook rest in the present application.

[0035] Figure 11 The installation schematic of the buffer pad in the present application.

[0036] Figure 12 The schematic of the hook placed on the inclined surface in the present application.

[0037] Figure 13 The Figure 10 The enlarged view of C in the present application.

[0038] Figure 14 The Figure 1 The enlarged view of B in the present application.

[0039] Figure 15 The schematic of the determination of the inclination angle of the support in the present application.

[0040] Figure 16 The top plane schematic of the installation platform on the gantry in the present application.

[0041] Figure 17 The top plane schematic of the determination of the position of the fixing point of the hook rest in the present application.

[0042] Figure 18 The schematic of the determination of the installation position of the gantry in the present application. DETAILED DESCRIPTION

[0043] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0044] As Figures 1 to 18 The assembly method of the combined rest device applied to the boom and the hook includes a rack, a boom rest frame and a hook rest frame, the boom rest frame is arranged on the mounting platform s4 at the top of the rack s1, the bottom of the rack s1 is fixed on the deck of a ship, the support platform s2 is arranged vertically on one side of the rack s1, one end of the support platform s2 is fixedly connected to the rack s1, the other end of the support platform s2 is fixedly connected to the rack s1 through the fixed rod s3, the hook rest is arranged on the support platform s2, the hook rest frame includes a limiting device, a first support 1 and a second support 2, and the second support 2 is provided with an inclined surface 21.

[0045] The boom rest frame includes a bracket a1 and two carrier roller devices, both sides of the top of the bracket a1 are respectively provided with limiting blocks, an opening a3 is formed between the limiting blocks, the carrier roller devices are arranged in the opening a3 on one side of the limiting blocks, the opening a3 is formed on the bracket a1 through the limiting blocks, the boom is slid into the opening a3 along the limiting blocks, the boom is limited from swinging left and right, and the boom is rested and limited from swinging; both sides of the bottom of the bracket a1 are provided with support frames, the support frames are fixedly welded at the bottom of the bracket a1, the support frames include a support frame one a41 and a support frame two a42, the support frame one a41 is connected perpendicularly to the bracket a1, one end of the support frame two a42 is connected perpendicularly to the bracket a1, and the other end of the support frame two a42 is arranged outwardly offset, so that the bracket a1 is supported by the support frames, the support frame two a42 is arranged outwardly offset, the downward projection area of the space surrounded by the support frames is increased, and the stability of the support is improved, in the embodiment, the number of the support frame one a41 and the support frame two a42 is both two, and the support frame one a41 and the support frame two a42 are fixedly installed on the top of the rack s1 through bolts.

[0046] As Figure 2 and 8As shown, one side of the limiting block is provided with a chamfering part a21, a connecting part a22 and a supporting part a23, an included angle a is formed between the top of the limiting block and one end of the chamfering part a21, the angle range of the included angle a is 120°-130°, an included angle b is formed between the other end of the chamfering part a21 and one end of the connecting part a22, the angle range of the included angle b is 130°-145°, in this embodiment, the angle of the included angle a is 127°, the angle of the included angle b is 143°, the other end of the connecting part a22 is flatly connected with one end of the supporting part a23, that is, after the other end of the connecting part a22 is connected with one end of the supporting part a23, the upper end surface is arranged in a flush manner, the other end of the supporting part a23 is fixedly connected on the bracket a1, the width of the other end of the supporting part a23 is greater than the width of one end of the supporting part a23, by arranging the chamfering part a21, the guiding effect can be achieved during the lowering process of the boom, and then the boom is slid into the opening along the connecting part a22, and the supporting part a23 can increase the contact area of the limiting block and the bracket a1, so that the connecting part of the limiting block and the bracket a1 can bear greater stress, the cushion block a24 is arranged on the chamfering part a21 and the connecting part a22, in this embodiment, the cushion block a24 is a sleeper, the screw hole a25 is arranged on the sleeper, and the sleeper is fixed on the chamfering part a21 and the connecting part a22 through a screw, so as to prevent the boom from directly colliding with the limiting block and causing friction, and then causing wear of the boom.

[0047] As shown in the figure, Figure 2 , 8 As shown, the limiting block includes a first limiting block 211 and a second limiting block 222, the first limiting block 211 and the second limiting block 222 are symmetrically and parallelly arranged on both sides of the top of the bracket a1 about the axis a5 on which the opening a3 is located, and the width of the opening a3 is greater than the width of the boom, so that the first limiting block 211 and the second limiting block 222 can limit the boom, and the boom can be placed into the opening a3 during the lowering process.

[0048] As shown in the figure, Figures 4-8 The roller device includes a support 11 and two or more roller groups, the support 11 is arranged on one side of the limiting block along the axis a5 of the opening a3, an included angle c is formed between the axis 9 on which the support 11 is located and the axis a5 on which the opening a3 is located, in this embodiment, the angle of the included angle c is 10°, the roller groups are detachably mounted on the support 11 along the width direction of the support 11, the roller group includes a pin shaft 12, a limiting piece (not marked in the figure) and two or more rollers 13, the roller 13 is sleeved on the pin shaft 12, one end of the pin shaft 12 is provided with a through hole matched with a fixing piece, and the limiting piece is detachably arranged on the pin shaft 12 through the through hole, in this embodiment, the number of rollers in each roller group is three, and the limiting piece is a bolt.

[0049] As shown in the figure, Figures 4-7As shown, the lower end of the support 11 is fixed on the bracket a1, the upper end of the support 11 is fixed with two or more mounting plates 14 along the length direction of the support 11, the mounting plates 14 are arranged in parallel with a spacing 15 between them, two or more through holes 16 are arranged on the mounting plates 14, the through holes 16 at the same position of adjacent mounting plates 14 are coaxially arranged, and the top end plane 17 of the mounting plate 14 is lower than the top of the roller 13, so that after the boom is placed on the bracket a1, the flat plate on the boom can abut against the roller 13, and during movement, rolling is realized between the flat plate and the roller 13, thereby reducing friction and noise. At the same time, the spacing 15 between the mounting plates 14 is wider than the width of the roller 13, and the distance between the centers of the two through holes 16 on the same mounting plate 14 is greater than the diameter of the roller 13, so that the roller 13 can be installed between the two mounting plates 14, and the rollers 13 between adjacent roller groups can rotate without interfering with each other.

[0050] As shown in Figures 9-12 , one end of the first support 1 and one end of the second support 2 are fixedly connected by the connecting column 3, and an included angle f is formed between the first support 1 and the second support 2 at the connecting position, the angle of the included angle f is 30°-45°, and in this embodiment, the angle of the included angle f is 30°, the second support 2 is provided with an inclined surface 21, and a buffer pad 22 is fixedly arranged on the inclined surface 21 along the length direction of the second support 2, as shown in Figure 11 , two or more countersunk holes 23 are arranged on the buffer pad 22, and the buffer pad 22 is fixed on the inclined surface 21 by the bolts 24 passing through the countersunk holes 23, so that during the lowering of the hook z1, the sliding friction between the hook z1 and the inclined surface 21 can be reduced, and the hook z1 can slide down along the inclined surface 21 under the action of its own gravity and slide into the limiting opening 5, and in this embodiment, the buffer pad 22 is a sleeper.

[0051] As shown in Figure 13As shown, the limiting device includes two or more than two stoppers 4, in this embodiment, the number of stoppers 4 is set to two, the stoppers 4 are oppositely arranged on the inclined surface 21, and the limiting opening 5 is formed between the two stoppers 4, the two stoppers 4 are symmetrically arranged on both sides of the buffer gasket 22 about the axis 6 where the limiting opening 5 is located and are arranged perpendicularly to the inclined surface 21, one side of the stopper 4 located in the limiting opening 5 is provided with an inclined part 41 and a connecting part 42, the connecting part 42 is connected with the inclined part 41, one end of the inclined part 41 is connected with the top of the stopper 4 to form an included angle d, the angle of the included angle d is 110°-125°, the other end of the inclined part 41 is connected with one end of the connecting part 42 to form an included angle e, the angle of the included angle e is 145°-160°, the other end of the connecting part 42 is connected perpendicularly with the bottom of the stopper 4, in this embodiment, the angle of the included angle d is 110°, and the angle of the included angle e is 160°, so that the inclined part 41 can limit the hook z1 sliding down into the limiting opening 5, so that the two sides of the trolley z2 on the hook z1 abut against the inclined part 41, so that the inclined part 41 generates an oblique upward and outward force on the two sides of the trolley z2 on the hook z1, so that the trolley z2 on the hook z1 is clamped between the inclined parts 41, and then the hook z1 is stopped on the second support 2.

[0052] As shown in Figure 12 , the width of the trolley z2 on the hook z1 is greater than the width between the inclined parts 41, and the width between the inclined parts 41 is greater than or equal to the width between the connecting parts 42, so as to facilitate the hook z1 to pass through between the connecting parts 42, and to achieve clamping of the two sides of the trolley z2 on the hook z1 by the inclined parts 41, so as to achieve the placement of the hook z1 between the stoppers 4.

[0053] As shown in Figure 9 , the bottom of the stopper 4 is provided with a support rod 7, one end of the support rod 7 is fixedly connected with the bottom of the stopper 4, the other end of the support rod 7 abuts against the contact plane through the second support 2, two or more than two connecting rods 8 are arranged between the first support 1 and the second support 2, the two ends of the connecting rod 8 are respectively fixedly connected with the first support 1 and the second support 2, so as to reinforce the stability between the first support 1 and the second support 2.

[0054] Further comprising the following specific steps:

[0055] S1 determines the position of the gantry s1 on the ship deck, in this embodiment, the distance from the gantry s1 to the slewing platform is less than the length of the boom, and the specific process is as follows, as shown in Figure 18 , taking the center O1 of the slewing platform base s5 as a reference point, then setting a gantry s1 position installation point O2 on a horizontal straight line q7 passing through the reference point, so that the distance d5 between the reference point and the installation point O2 is equal to 2 / 3 of the length of the boom, and the vertical axis q1 of the gantry s1 coincides with the installation point O2, then the bottom of the gantry s1 is fixedly welded on the ship deck.

[0056] S2 Welding a support platform s2 on one side of the rack s1, so that the support platform s2 is perpendicular to the vertical axis q1 of the rack 1, and then welding a fixed rod s3 between the rack s1 and the support platform s2. Specifically, taking the mounting surface on which the mounting point O2 in step S1 is located as a reference, placing a lifting platform (not shown in the figure) on the mounting surface, and then placing the support platform s2 on the lifting platform, lifting the support platform s2 to the desired height by the lifting platform, in this embodiment, the support platform s2 is lifted to 1 / 5 of the height of the rack s1, then welding one end of the support platform s2 to the rack s1, and welding the fixed rod s3 to the other end of the support platform s2, and finally welding the fixed rod s3 to the rack s1.

[0057] S3 Welding an installation platform s4 on the top of the rack s1, so that the installation platform s4 is parallel to the mounting surface of the deck at the bottom of the rack s1, and the axis q2 of the installation platform s4 is in the same vertical plane as the horizontal straight line passing through the reference point.

[0058] S4 Welding a boom rest on the installation platform s4, as shown in Figures 15-16 , so that the bracket a1 is perpendicular to the installation platform s4, and the axis 5 of the opening on the bracket a1 is in the same vertical plane as the horizontal straight line q2 passing through the center O of the installation platform s4, then taking the axis 5 of the opening on the bracket a1 as a reference, drawing a third straight line q3 perpendicular to the axis 5 of the opening on the bracket a1 on the plane on which the bracket a1 is located, determining the angle g between the third straight line q3 and the axis 9 on which the bracket is located, based on the angle c between the axis 9 on which the bracket is located and the axis 5 on which the opening is located, and then measuring the distance d1 between the bracket 11 and the axis 5 of the opening on the bracket, to determine the inclination angle of the bracket 11, fixing the bracket 11 on the bracket a1, and then installing the roller set on the bracket 11.

[0059] S5 Taking the vertical plane in step S4 as a reference, as shown in Figure 9 , 10 , 17, drawing a vertical plane intersecting the plane s5 on which the support platform a2 is located, and then measuring the width d2 of the first bracket 1 and the second bracket 2, and the distance d3 between the flush ends of the first bracket 1 and the second bracket 2, respectively.

[0060] S6, with the intersecting straight line q4 of step S5 as a reference, makes a first straight line q5 perpendicular to the intersecting straight line q4 on the plane s5 where the support platform is located, then takes the intersection point D of the first straight line q5 and the intersecting straight line q4 as a starting point, makes a certain point W1 on the first straight line q5, makes the distance between the intersection point D and the certain point W1 equal to half of the width d2 of the first support 1, then takes the intersecting straight line q4 as a symmetric axis, makes a symmetric point of the certain point W1 on the first straight line q5, and in the embodiment, the symmetric point is set as another certain point W2, to obtain the fixed point positions W1, W2 of the first support 1 on the support platform s2.

[0061] S7, as shown in Figure 17 Fig. 7, repeats step S6 to make a second straight line q6, makes the distance d4 between the first straight line q5 and the second straight line q6 equal to the distance d3 between the flush end of the first support 1 and the second support 2, to obtain the fixed point positions W3, W4 of the second support 2 on the support platform s2.

[0062] S8, places the assembled hook rest rack on the fixed point positions W1, W2, W1, W2 of the support platform s2, and welds and fixes the first support 1 and the second support 2.

[0063] The working principle of the present application is as follows: first, the position of the rack is determined, and the rack is welded and fixed on the deck of the ship, then a support platform is welded on one side of the rack and an installation platform is welded on the top of the rack, then a hoist arm rest rack is vertically welded on the installation platform, and the axis of the opening on the bracket is in the same vertical plane as the horizontal straight line passing through the center of the installation platform, finally, with the vertical plane as a reference, a hook rest rack is welded on the support platform, to ensure that the axis of the bracket is in the same vertical plane as the axis of the inclined surface of the first support, so that the hoist arm can change the amplitude and the angle in the vertical plane, and the hook can be accurately lowered to the inclined surface of the first support to complete the resting, and the hoist arm can be lowered into the hoist arm rest rack.

Claims

1. A method of assembling a combined rest device for a boom and a hook, characterized in that: The method comprises the following steps: S1, determining the position of the rack on the deck of the ship, and then welding the bottom of the rack to the deck of the ship; S2, welding a support platform on one side of the rack, so that the support platform is arranged perpendicularly to the vertical axis of the rack, and then welding a fixing rod between the rack and the support platform; S3, welding an installation platform on the top of the rack, so that the installation platform is arranged in parallel to the installation surface of the bottom of the rack and the deck; S4, welding a cradle rest on the installation platform, so that the cradle is arranged perpendicularly to the installation platform and the axis of the opening on the cradle is in the same vertical plane as the horizontal straight line passing through the center of the installation platform; S5, taking the vertical plane of step S4 as a reference, drawing a straight line intersecting the plane of the support platform and the vertical plane, and then measuring the width of the first support and the distance between the first support and the second support; S6, taking the intersecting straight line of step S5 as a reference, drawing a first straight line perpendicularly to the intersecting straight line on the plane of the support platform, and then drawing a certain point on the first straight line, so that the distance between the intersection point and the certain point is equal to half the width of the first support, and then drawing the symmetric point of the certain point on the first straight line with the intersecting straight line as the axis of symmetry, to obtain the fixed point position of the first support on the support platform; S7, repeating step S6 to draw a second straight line, so that the distance between the first straight line and the second straight line is equal to the distance between the first support and the second support, to obtain the fixed point position of the second support on the support platform; S8, placing the assembled hook rest on the fixed point position of the support platform, and then welding and fixing the first support and the second support.

2. The method of claim 1, wherein: In step S1, the center of the rotary platform base is taken as a reference point, and then a rack position installation point is set on the horizontal straight line passing through the reference point, so that the distance between the reference point and the installation point is equal to 2 / 3 of the length of the boom.

3. A method of assembling a combined rest device for a boom and a hook according to claim 2, characterized in that: The vertical axis of the rack is coincided with the installation point.

4. The method of claim 1, wherein: In step S2, the installation surface on which the installation point is located is taken as a reference, the placement of the lifting platform is placed on the installation surface, and then the support platform is placed on the lifting platform, the support platform is lifted to the required height through the lifting platform, one end of the support platform is welded to the rack, the fixing rod is welded to the other end of the support platform, and finally the fixing rod is welded to the rack.

5. The method of claim 1, wherein: In step S3, the axis of the installation platform is arranged in the same vertical plane as the horizontal straight line passing through the reference point.

6. The assembly method of the combined rest device applied to the boom and the hook according to claim 1, wherein: In step S4, the axis of the opening on the cradle is taken as a reference, a third straight line perpendicularly to the axis of the opening on the cradle is drawn on the plane on which the cradle is located, the angle between the third straight line and the axis on which the support is located is determined through the angle between the axis on which the support is located and the axis of the opening, the distance between the support and the axis of the opening on the cradle is measured, so as to determine the inclination angle of the support, the support is fixed on the cradle, and the roller set is installed on the support.

Images