A method for installing the pin shaft of a large crane's herringbone frame

Abstract

The present invention discloses a method for installing a pin shaft of a large crane frame, which comprises the following steps: arranging pin shaft hangers on the outer side walls of the pull rods on both sides above the upper hinge point, and installing a clamping plate on the outer side wall of the pull rod at the upper hinge point to partially or completely block the shaft hole; lifting the frame and turning it over, hanging the upper hinge pin shaft through the pin shaft hanger, aligning the upper hinge pin shaft with the shaft hole, and preventing the upper hinge pin shaft from passing through the shaft hole of the pull rod through the clamping plate, and achieving the purpose of fixing the pin shaft; The frame is hoisted to the upper hinge position of the rotary assembly, and then the axis clamping plate is removed. Several tooling screws are distributed around the axis hole on the outer wall of the pull rod and are parallel to the axis hole. The top screw clamping plate and the tooling blind plate are installed through the tooling screws. The top screw clamping plate is matched to fit the upper hinge pin. The tooling blind plate is located near the end of the upper hinge pin facing away from the pull rod. Then a push-up cylinder is installed on the tooling blind plate to separate the upper hinge pin from the pin hanger, and the hinge pin is pressed up by the push-up cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of ship lifting, in particular to a method for installing a pin shaft of a large crane herringbone frame. Background Art

[0002] Currently in the field of ship lifting, when the outer dimensions of the herringbone crane are 51000*21780*11230mm and the weight is 389 tons, a crawler crane is used for single-machine lifting. There are two pins at the upper hinge point of the pull rod, with a size of Φ450*2260 and a single weight of 2805Kg. There are two pins at the lower hinge point of the pressure rod, with a size of Φ450*1860 and a single weight of 2315Kg. The pins are not equipped with tooling teeth. The pin holders are in the form of slots and have directional requirements for installation. In addition, when the ship is floating, the herringbone frame pin hinge is 31 meters above the deck surface, so it is interfered with by the herringbone frame's external ladder. The portal crane and 260T truck crane cannot meet the requirements for lifting the pin due to the lifting distance and lifting height. It is very difficult and inconvenient to fix the herringbone frame pin, pre-position it, and quickly align the four hinge points of the herringbone frame with the hinge points of the slewing assembly. Summary of the Invention

[0003] The purpose of the present invention is to provide a large crane herringbone frame pin shaft installation method that can quickly position and center the feed shaft when the large crane herringbone frame pin shaft is installed on a floating ship under the condition that other crane configurations are limited by the lifting distance and lifting height.

[0004] A method for installing a pin shaft of a large crane herringbone frame comprises the following steps:

[0005] 1. After the A-frame is assembled on the ground, pin hangers are respectively installed on the outer walls of both sides of the A-frame tie rod above the upper hinge point, and a clamping plate is installed on the outer wall of the tie rod at the upper hinge point to partially or completely block the shaft hole;

[0006] 2. Lift the A-frame and turn it over. Connect the upper hinge pin through the pin hanger. Align the upper hinge pin with the shaft hole and use the clamping plate to prevent the upper hinge pin from passing through the shaft hole of the pull rod.

[0007] 3. Hoist the A-frame to the upper hinge point of the rotary assembly, then remove the axis clamping plate, and install several tooling screws distributed around the axis hole on the outer wall of the pull rod in parallel with the axis hole, and install the top screw clamping plate and the tooling blind plate through the tooling screws. The top screw clamping plate fits the upper hinge pin, and the tooling blind plate is located near the end of the upper hinge pin facing away from the pull rod. Then install the pushing cylinder on the tooling blind plate, separate the upper hinge pin from the pin hanger, and use the pushing cylinder to push the upper hinge pin into the axis hole and the upper hinge point of the rotary assembly, and use the top screw clamping plate and the tooling blind plate to move along the tooling screw to adjust the position of the upper hinge pin.

[0008] 4. Hoist the A-frame to the lower hinge point of the slewing assembly, set up tooling frames on the slewing assembly on both sides of the outer side of the lower hinge point of the slewing assembly, fix the tooling frames of the A-frame pressure rod lower hinge pin after the pressure rod is centered, and hang the lower hinge pin through the tooling frames. Install several tooling screws on the outer wall of the pressure rod around the shaft hole in parallel with the shaft hole, and install the top screw clamp and tooling blind plate through the tooling screws. The top screw clamp fits the lower hinge pin in a matching manner. The tooling blind plate is located near the end of the lower hinge pin facing away from the pressure rod, and then a pushing cylinder is installed on the tooling blind plate to separate the lower hinge pin from the tooling frame. The hinge pin is pushed down by the pushing cylinder to insert it into the shaft hole and the lower hinge of the rotary assembly. The position of the lower hinge pin is adjusted by moving the top screw clamp and the tooling blind plate along the tooling screw until the lower hinge pin completely passes through the lower hinge of the rotary assembly and passes through the inner wall of the pressure rod to one side of the lower hinge.

[0009] As a preferred solution of the present invention, the pin hanger includes two steel sections connected at an angle and installed on the outer wall of the pull rod. The steel section at the lower part of the pin hanger is parallel to the shaft hole and is provided with several distributed hanging weights on the lower side. The upper hinge pin is hoisted to the hanging weight of the steel section by a hand hoist and a clamping shaft tooling.

[0010] As a preferred solution of the present invention, the tooling blind plate is provided with an arc plate and a rib plate.

[0011] As a preferred solution of the present invention, a boss circular sleeve is provided on one side of the top screw clamping plate, and a top screw seat with a screw hole is provided on the boss circular sleeve.

[0012] As a preferred solution of the present invention, in step four, when the lower hinge pin enters the shaft sleeve of the lower hinge of the rotary assembly, the ejection cylinder is replaced with a striking cylinder.

[0013] As a preferred solution of the present invention, the ejection cylinder is a double-acting cylinder.

[0014] As a preferred solution of the present invention, in steps three and four, when the pin shaft enters the second hinge position of the hinge point, the tooling screw is replaced with a shorter tooling screw.

[0015] As a preferred solution of the present invention, the tooling frame is provided with a plurality of hanging brackets distributed along the axial direction of the hinge axis hole, and the lower hinge pin is connected to the hanging brackets of the tooling frame through a hand hoist and a clamping shaft tool.

[0016] Compared with the prior art, the embodiment of the present invention provides a method for installing a large crane A-frame pin shaft, which has the following beneficial effects: by utilizing multiple adjustable devices, tooling or structures, and reasonable operating steps, the installation process is safe and reliable, labor intensity is reduced, construction efficiency is improved, and no additional crane is required for construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the operation of assembling the upper hinge point of the A-frame tie rod in an embodiment of the present invention;

[0018] Figure 2 Schematic diagram of the hoisting structure of the upper hinge pin in an embodiment of the present invention;

[0019] Figure 3 1 is a schematic diagram of the installation and application structure of the clamping shaft plate in an embodiment of the present invention;

[0020] Figure 4 1. It is a schematic diagram of the installation and application structure of the shaft clamping tooling in an embodiment of the present invention;

[0021] Figure 5 1. It is a schematic diagram of the pressing operation of the upper hinge pin in an embodiment of the present invention;

[0022] Figure 6 1 is a front view structural diagram of a tooling blind plate in an embodiment of the present invention;

[0023] Figure 7 1 is a schematic diagram of a top view of a tooling blind plate according to an embodiment of the present invention;

[0024] Figure 8 1 is a front view structural diagram of a top screw clamping plate according to an embodiment of the present invention;

[0025] Figure 9 1 is a schematic top view of the structure of the top screw clamp plate in an embodiment of the present invention;

[0026] Figure 10 This is a schematic diagram of the operation of assembling the lower hinge point of the A-frame pressure rod in an embodiment of the present invention;

[0027] Figure 11 This is a schematic diagram of the lifting and pressing structure of the lower hinge pin in an embodiment of the present invention;

[0028] Figure 12 It is a schematic diagram of the operation of replacing the bell-striking final shaft when the lower hinge pin final shaft is final shaft in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0030] In the description of the present invention, it should be understood that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" used in the present invention should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] In the description of the present invention, it should also be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the machine or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0032] refer to Figure 1 -12. A method for installing a pin shaft of a large crane A-frame according to an embodiment of the present invention comprises the following steps:

[0033] 1. After the A-shaped frame 1 is assembled on the ground, the tie rod 11 of the A-shaped frame 1 is used as a fulcrum. Pin hangers 4 are respectively installed on the outer walls of the tie rod 11 on both sides of the A-shaped frame 1 above the upper hinge point, and a clamping plate 31 is installed on the outer wall of the tie rod 11 at the upper hinge point to partially or completely block the shaft hole;

[0034] 2. Lift the A-frame and turn it over, measure the data of the shaft sleeve of the A-frame 1 tie rod 11 and the corresponding shaft sleeve of the rotary assembly, hang the upper hinge pin 12 through the pin hanger 4, align the upper hinge pin 12 with the shaft hole and prevent the upper hinge pin 12 from passing through the shaft hole of the tie rod 11 through the clamping plate 3;

[0035] 3. Hoist the herringbone frame 1 to the upper hinge position of the rotary assembly 2, then remove the card plate 31, and install several tooling screws 32 distributed around the shaft hole on the outer wall of the pull rod 11 in parallel with the shaft hole, and install the top screw card plate 33 and the tooling blind plate 34 through the tooling screw 32, and fix them with nuts. The top screw card plate 33 fits the upper hinge pin 12, and the tooling blind plate 34 is located near the end of the upper hinge pin 12 facing away from the pull rod 11. Then install the push-up cylinder 35 on the tooling blind plate 34, separate the upper hinge pin 12 from the pin hanger 4, and press the upper hinge pin through the push-up cylinder 35 12 is inserted into the shaft hole and the upper hinge point 21 of the rotary assembly, and the top screw clamp 33 and the tooling blind plate 34 are used to move along the tooling screw 34 to adjust the position of the top hinge pin 12. Therefore, the two upper hinge points of the pull rod 11 are connected to the two upper hinge points 21 of the rotary assembly by two pins respectively. The upper hinge pin 12 does not need to be lifted by a crane and will not be affected by the floating state of the ship. The alignment and centering of the pin and the shaft hole are always maintained, and the tolerance during the shaft insertion process is easy to adjust. At the same time, various inconveniences that the previous method of connecting two upper hinge points with only one long pin at the same time requires complex mechanisms and operations to be achieved.

[0036] 4. Hoist the A-frame 1 to the lower hinge point of the slewing assembly 2, measure the data of the pressure rod 13 sleeve of the A-frame 1 and the corresponding sleeve of the slewing assembly, and hoist the lower hinge pin 14 to the corresponding position of the walkway platform of the slewing assembly 2 after meeting the requirements, set the tooling frame 5 on the slewing assembly 2 on the outside of the lower hinge point 22 of the slewing assembly, and hoist the tooling frame just above the pin. After the pressure rod is centered, fix the A-frame pressure rod lower hinge pin tooling frame, and hoist the lower hinge pin 14 through the tooling frame 5. Install several tooling screws 32 on the outer side wall of the pressure rod 13 around the shaft hole in parallel with the shaft hole, and install the top screw clamp 33 and the tooling blind plate 34 through the tooling screw 32, and fix them with nuts. The top screw clamp 33 fits the lower hinge pin 14 in a matching manner, and the tooling blind plate 34 is located at the lower hinge pin The shaft 14 is facing away from one end of the pressure rod 13, and then a pushing cylinder 35 is installed on the tooling blind plate 34 to separate the lower hinge pin 14 from the tooling frame 5. The lower hinge pin 14 is pushed by the pushing cylinder 35 to insert it into the shaft hole and the lower hinge 22 of the rotary assembly. The top screw card 33 and the tooling blind plate 34 are used to move along the tooling screw 34 to adjust the position of the pushed lower hinge pin 14 until the lower hinge pin 14 completely passes through the lower hinge 22 of the rotary assembly and passes through the inner side wall of the pressure rod 13 on one side of the lower hinge. The tooling frame 5 uses the platform near the lower hinge 22 of the rotary assembly as a fulcrum, and the tooling frame 5 and the lower hinge pin 14 can be pre-lifted into place in advance. After the pressure rod 13 is centered, it can be directly lifted, adjusted and pressed by a hoist, effectively solving the problem of limited crane resources.

[0037] refer to Figure 2-5. Exemplarily, the pin hanger 4 includes two steel sections 41 connected at an angle and installed on the outer wall of the pull rod 11. The steel section 41 at the lower part of the pin hanger 4 is parallel to the shaft hole and is provided with several distributed hanging weights on the lower side. The upper hinge pin 12 is connected to the hanging weights of the steel section 41 through a hand winch 42 and a shaft clamping fixture 43. The application of the shaft clamping fixture 43 and the hand winch 42 can convert the pin from a horizontal state to a vertical state to fix it, and meet the requirements of pin fixing and direction adjustment. The shaft clamping plate 31 can improve the safety factor. The shaft clamping fixture 43 is matched with the pin and is used to convert the pin fixing mode into a pressing mode and rotate the pin after the shaft is advanced.

[0038] refer to Figure 5 -7, illustratively, the tooling blind plate 34 is provided with an arc plate 341 and a rib plate 342, which serve as a support bracket for the ejection cylinder 35 and a back structure reinforcement of the tooling blind plate 34, respectively. The rib plate 342 is preferably cross-shaped.

[0039] refer to Figure 8 -9. For example, a boss sleeve 331 is provided on one side of the top screw clamp 33, and a top screw seat with a screw hole is provided on the boss sleeve 331. A top screw tool with a brass rod at the end can be put into the screw hole of the top screw seat, effectively solving the problem of coaxiality adjustment of large pin shafts and sleeves.

[0040] refer to Figure 12 For example, in step four, when the lower hinge pin 14 enters the shaft sleeve of the lower hinge 22 of the rotary assembly, the pushing cylinder 35 is replaced with the striking bell 36. The shaft is pressed by the pushing cylinder and the striking bell is used to advance the shaft, which is safe and reliable, and can reduce labor intensity, improve efficiency and quickly advance the shaft.

[0041] refer to Figure 5 and 11 For example, the ejection cylinder 35 is a double-acting cylinder, which can be driven by oil pressure through two chambers at both ends of the cylinder body at the same time, and the linear movement and driving force of the cylinder are more controllable and faster.

[0042] refer to Figure 5 and 11 For example, in steps three and four, when the pin shaft enters the second hinge position of the hinge point, the original longer tooling screw 32 is replaced with a shorter tooling screw 32, so that the upper hinge pin shaft 12 or the lower hinge pin shaft 14 completely passes through the upper hinge point 21 of the rotary assembly or the lower hinge point 22 of the rotary assembly, and passes through the inner side wall of the pull rod 11 on one side of the upper hinge point or the inner side wall of the pressure rod 13 on one side of the lower hinge point. Since several tooling screws 32 are distributed around the center of the hinge point at the same time, they can be replaced directly one by one without affecting other tooling and structural parts, and the operation is quite convenient.

[0043] refer to Figure 11For example, the tooling frame 5 is provided with several hanging brackets distributed axially along the hinge axis hole, and the lower hinge pin 14 is hoisted to the hanging bracket of the tooling frame 5 by a hand winch and a clamping shaft fixture. The application of the clamping shaft fixture and the hand winch can convert the pin from a horizontal state to a vertical state to fix the pin, and meet the requirements of pin fixing and direction adjustment. The clamping shaft fixture is matched with the pin, and is used to convert the pin fixing mode into the pressing mode and rotate the pin after the shaft is inserted.

[0044] In summary, the embodiment of the present invention provides a method for installing a pin shaft of a large crane herringbone frame, which can achieve the following effects:

[0045] 1. It effectively solves the problem of quickly locating and centering the shaft when installing the herringbone pin of a large crane on a floating ship, when other crane configurations are limited by the lifting distance and lifting height;

[0046] 2. The hinge pin on the A-frame tie rod is fixed with the M30 seat and the axis plate of the A-frame tie rod to increase the safety factor. The tie rod is used as a fulcrum and fixed with steel, hanging bracket and hoist. It also meets the requirements of pin fixation and direction adjustment.

[0047] 3. The pressing device uses a herringbone frame shaft plate tooth seat, tooling screw, nut, fixed top screw clamp, tooling blind plate, and a hollow double-acting oil cylinder to press the shaft and strike the bell to advance the shaft. It is safe and reliable, and can reduce labor intensity, improve efficiency and quickly advance the shaft;

[0048] 4. The bolt holes of the top screw clamping plate and the tooling blind plate of the device match the tooth seat of the herringbone frame clamping shaft plate, and the top screw tooling cooperates with the top screw clamping plate tooth seat, effectively solving the problem of coaxial adjustment of large pin shafts and sleeves;

[0049] 5. The tooling frame for the lower hinge point pin of the A-frame pressure rod uses the lower hinge point platform of the slewing assembly as a fulcrum. The tooling frame and the pressure rod pin can be pre-installed in place. After the pressure rod is centered, the hoist can be used directly to lift, adjust the centering and press the rod, effectively solving the problem of limited crane resources.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A method for installing a large crane herringbone frame pin, characterized in that The following steps are involved:

1. After the A-shaped frame is assembled on the ground, pin hangers are respectively installed on the outer walls of the pull rods on both sides of the A-shaped frame above the upper hinge point, and a clamping plate is installed on the outer wall of the pull rod at the upper hinge point to partially or completely block the shaft hole. The pin hanger includes two steel sections connected at an angle and installed on the outer wall of the pull rod. The steel section at the bottom of the pin hanger is parallel to the shaft hole and is provided with several distributed hanging weights on the lower side. The upper hinge pin is hoisted to the hanging weight of the steel section through a hand hoist and a clamping tooling; 2. Lift the A-frame and turn it over. Connect the upper hinge pin through the pin hanger. Align the upper hinge pin with the shaft hole and use the clamping plate to prevent the upper hinge pin from passing through the shaft hole of the pull rod.

3. Hoist the herringbone frame to the upper hinge point of the rotary assembly, then remove the axis clamping plate, distribute several tooling screws around the axis hole on the outer wall of the pull rod and parallel to the axis hole, and install the top screw clamping plate and the tooling blind plate through the tooling screw, and the top screw clamping plate fits the upper hinge pin, and the tooling blind plate is located near the end of the upper hinge pin facing away from the pull rod. Then install the pushing oil cylinder on the tooling blind plate, separate the upper hinge pin from the pin hanger, and push the upper hinge pin through the pushing oil cylinder to insert it into the axis hole and the upper hinge point of the rotary assembly, and use the top screw clamping plate and the tooling blind plate to move along the tooling screw to adjust the position of the upper hinge pin. A boss round sleeve is provided on one side of the top screw clamping plate, and a top screw seat with a screw hole is provided on the boss round sleeve; 4. Hoist the herringbone frame to the lower hinge point of the slewing assembly, set up tooling frames on the slewing assembly on both sides of the outer side of the lower hinge point of the slewing assembly, fix the tooling frame of the lower hinge point pin of the herringbone frame pressure rod after the pressure rod is centered, and hang the lower hinge point pin through the tooling frame. Install several tooling screws parallel to the shaft hole around the outer wall of the pressure rod, and install the top screw card and tooling blind plate through the tooling screws. The top screw card fits the lower hinge point pin in a matching manner. The tooling blind plate is located near the end of the lower hinge point pin facing away from the pressure rod, and then A push-up oil cylinder is installed on the blind plate to separate the lower hinge pin from the fixture frame. The hinge pin is pushed down by the push-up oil cylinder to be inserted into the shaft hole and the lower hinge of the rotary assembly. The position of the lower hinge pin is adjusted by moving the top screw clamp and the fixture blind plate along the fixture screw until the lower hinge pin completely passes through the lower hinge of the rotary assembly and passes through the inner side wall of the pressure rod to one side of the lower hinge. The fixture frame is provided with several hanging brackets distributed along the axial direction of the hinge shaft hole. The lower hinge pin is lifted to the hanging bracket of the fixture frame through a hand chain hoist and a clamping fixture. In steps three and four, when the pin shaft enters the second hinge position of the hinge point, the tooling screw is replaced with a shorter tooling screw.

2. A large crane herringbone frame pin installation method according to claim 1, characterized in that: The tooling blind plate is provided with an arc plate and a rib plate.

3. A large crane herringbone frame pin installation method according to claim 1, characterized in that: In step 4, when the lower hinge pin enters the shaft sleeve of the lower hinge of the rotary assembly, the ejector cylinder is replaced with a striking cylinder.

4. A large crane herringbone frame pin installation method according to claim 1, characterized in that: The ejection oil cylinder is a double-acting oil cylinder.

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