Installation method of guide pulley and steel wire rope on boom

Abstract

The present invention provides a method for installing a guide pulley and a wire rope on a boom. First, the guide pulley frame is installed on the mounting seat with the connecting plate of the mounting seat as a reference to form an integral body with the mounting seat. Then, the guide pulley frame and the mounting seat are fixedly installed on the support plane with the bottom plate of the mounting seat as a reference. Since the bottom plate of the mounting seat and the connecting plate are coaxial and parallel to each other, they are all installed with the mounting seat as the installation reference, so that it can be ensured that the guide pulley frame is parallel to the mounting seat, and the support plane is also parallel to the mounting seat, thereby ensuring that the guide pulley frame is parallel to the support plane, thereby avoiding tilting of the guide pulley frame after installation and failing to ensure that the tilt angle of the pulley installed on the guide pulley frame is the same as the deflection angle of the guide pulley frame. The installation method is reliable and easy to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, and in particular to a method for installing a guide pulley and a steel wire rope on a boom. Background Art

[0002] In existing large-scale operating machinery and equipment, such as winches and cranes, wire ropes are often required for construction. In the process of using the wire ropes, the wire ropes need to be combined with pulleys. In this way, the direction of the wire ropes can be changed during the operation, and the loss of the wire ropes can also be reduced. Therefore, it is necessary to install a wire rope guide device on the operating equipment to guide the wire ropes. For example, the patent document with Chinese patent application number 201410097275.1 and publication date 2015.09.16 discloses a wire rope guide device. The wire rope guide device mainly consists of a guide The cam is composed of a wheel, a fixed frame and a guide wheel shaft. The guide wheel is placed on the fixed frame through the guide wheel shaft. It also includes a fixed shaft and a positioning block. The fixed frame is fixed to the mechanical equipment through the fixed shaft. The fixed frame can rotate around the fixed shaft. A positioning block is provided between the fixed frame and the mechanical equipment to limit the adjustable range of the fixed frame, so that the fixed frame can swing within the range limited by the positioning block under the action of the shear force generated when the wire rope rotates, thereby reducing the friction between the wire rope and the edge of the guide wheel; the wire rope pulled out from the winch drum is turned by the guide wheel and then turned vertically upward to reach the top of the mechanical equipment to complete the heavy lifting operation.

[0003] The above-mentioned document installs the guide wheel on the fixed frame, and then makes the fixed frame rotate around the fixed seat, thereby driving the guide wheel to rotate within the adjustment range to adjust the angle between the wire rope and the guide wheel; however, the fixed frame does not have a deflection angle set, and only rotates the fixed frame around the fixed seat. In this way, the installation process and structure of the device still cannot solve the problem of wire rope wear caused by large changes in the angle between the wire rope and the second pulley during the boom operation. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for installing a guide pulley and a steel wire rope on a boom, which can ensure that the inclination angle of the guide pulley after installation is the same as the deflection angle in the guide pulley frame, thereby ensuring that the sound output angle of the steel wire rope is changed. The installation method is reliable and easy to operate.

[0005] To achieve the above-mentioned purpose, a method for installing a guide pulley and a wire rope on a boom is provided, comprising a mounting seat and a guide pulley frame, wherein the bottom of the mounting seat is provided with a bottom plate, the top of the mounting seat is provided with a connecting plate, and the bottom of the guide pulley frame is provided with a flange plate, and the bottom plate and the connecting plate are coaxial and parallel to each other;

[0006] The following steps are also included:

[0007] S1 calculates the deflection angle of the guide pulley frame;

[0008] S2 assembles the guide pulley frame according to the deflection angle in step S1;

[0009] S3 Place the mounting base on the reference horizontal plane, ensuring that the base plate of the mounting base is perpendicular to the horizontal plane. Then, using the connecting plate of the mounting base as a reference, lift the guide pulley frame and place it above the connecting plate, ensuring that the center of the connecting plate and the center of the flange plate are on the same axis.

[0010] S4 hoists the guide pulley frame and lowers it along the axis of the flange plate. After the flange plate abuts against the connecting plate, a fastener is passed through the through hole four provided on the connecting plate and the flange plate to fix the connecting plate and the flange plate together.

[0011] S5: Determine the position of the mounting base within the support plane, and then use the base plate of the mounting base as a reference to ensure that the base plate is perpendicular to the support plane, and that the deflected side of the guide pulley frame is close to the horizontal line passing through the center of the slewing platform;

[0012] S6 uses fasteners to pass through the through hole three set on the base plate to fix the base plate to the support plane, and then fix the guide pulley frame and the mounting seat to the rotary platform to form a whole. Finally, the guide pulley is installed on the guide pulley frame to complete the installation.

[0013] The above method first uses the connecting plate of the mounting seat as a reference to install the guide pulley frame on the mounting seat to form an integral body with the mounting seat, and then uses the bottom plate of the mounting seat as a reference to fix the guide pulley frame and the mounting seat on the support plane. Since the bottom plate of the mounting seat and the connecting plate are coaxial and parallel to each other, they are all installed with the mounting seat as the installation reference, which ensures that the guide pulley frame is parallel to the mounting seat, and the support plane is also parallel to the mounting seat, thereby ensuring that the guide pulley frame is parallel to the support plane, thereby avoiding the guide pulley frame from tilting after installation and failing to ensure that the inclination angle of the pulley installed on the guide pulley frame is the same as the deflection angle of the guide pulley frame.

[0014] Furthermore, the step S1 also includes S1.1 to S1.3,

[0015] S1.1 Using the center of the slewing platform as the circle center reference, set a calibration point on the support plane located in the 60° to 70° angle range, ensuring that the distance from the calibration point to the center of the slewing platform is greater than the radius of the slewing platform. Then, secure the mounting base at the calibration point, install a guide pulley frame with no deflection angle on the mounting base, and install the guide pulley on the guide pulley frame with no deflection angle.

[0016] S1.2 Select the guide pulley at the calibration point as point B, the tripod top pulley as point A, the offset pulley on the boom at the minimum amplitude, the offset pulley and the wire rope contact point as point C1, the offset pulley on the boom at the maximum amplitude, the offset pulley and the wire rope contact point as point C2, and the offset pulley on the boom at the mid-amplitude as point C3;

[0017] S1.3 Drive the boom to rotate within the boom range, then measure the angle a between the plane ABC1 where the wire rope is located when the boom is at its minimum value and the plane ABC2 where the wire rope is located when the boom is at its maximum value, and calculate the deflection angle b of the guide pulley frame. The calculation formula for the deflection angle b is as follows:

[0018] .

[0019] The above setting sets a calibration point on the support plane and makes the distance from the calibration point to the center of the slewing platform greater than the radius of the slewing platform. In this way, installing a guide pulley at the calibration point can avoid interference between the wire rope bypassing the guide pulley and the middle leg of the tripod. Since the angle of the wire rope will also change during the boom amplitude change process, the angle a between the plane ABC1 where the wire rope is located when the boom is at the minimum value during the amplitude change process and the plane ABC2 where the wire rope is located when the boom is at the maximum value during the amplitude change process is used, and half of the angle a is used as the deflection angle b of the guide pulley frame. In this way, the plane passing through the deflection angle b can coincide with the plane ABC3 when the boom is at the median value.

[0020] Furthermore, the step S2 also includes S2.1 to S2.5,

[0021] S2.1 Place the flange plate on a reference horizontal plane, then secure pulley plate 1 to a manipulator that rotates with a motor. The motor is mounted on a telescopic rod that can move up and down.

[0022] S2.2: The pulley plate 1 is driven to move by the telescopic rod until the bottom end of the pulley plate 1 contacts the flange plate;

[0023] S2.3 The motor drives the manipulator to rotate, thereby driving the pulley plate 1 to rotate around the point where it abuts the flange plate, until the inclination angle c between the pulley plate 1 and the flange plate equals the deflection angle b, at which point the motor stops operating;

[0024] S2.4 Spot weld the joints between pulley plate 1 and flange plate, then remove pulley plate 1 from the manipulator and repeat steps S2.1 to S2.3 to weld pulley plate 2.

[0025] S2.5 Completely weld pulley plate 1 and pulley plate 2, then weld the rope guard rod between pulley plate 1 and pulley plate 2, weld rib plate 1 between flange plate and pulley plate 1, and weld rib plate 2 between flange plate and pulley plate 2, and assemble the guide pulley frame with a deflection angle b.

[0026] The above arrangement facilitates that the inclination angle between the flange plate and the pulley plate 1 on the assembled guide pulley frame is equal to the deflection angle b.

[0027] Furthermore, step S3 further includes passing the steel wire rope through the through hole 1 provided on the pulley plate 1 and the pulley plate 2, and hoisting the guide pulley frame to the top of the connecting plate by a mobile single-arm hoist. The above arrangement facilitates the movement of the guide pulley frame from other positions to the top of the connecting plate.

[0028] Furthermore, the step S4 also includes controlling the mobile single-arm hoist to lower the wire rope so that the guide pulley frame descends along the axis direction of the flange plate.

[0029] The above arrangement facilitates adjustment of the height of movement of the guide pulley frame and ensures that the guide pulley frame and the mounting seat are coaxially mounted.

[0030] Furthermore, the step S5 of determining the position of the mounting seat includes steps S5.1 to S5.2.

[0031] S5.1 Construct plane ABC3 through the median of angle a so that plane ABC3 intersects the support plane and forms an intersecting straight line on the support plane;

[0032] S5.2 With the center of the slewing platform as the center of the circle, draw a straight line within the support plane within the angle range of 60°~70° through the center of the circle so that the straight line intersects the intersecting straight line. The intersection is the location of the mounting base.

[0033] The above arrangement facilitates installation of the mounting base after the position of the mounting base is determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a main view of plane ABC1, plane ABC2 and plane ABC3 during the boom luffing process of the present invention.

[0035] Figure 2 It is a top view of plane ABC1, plane ABC2 and plane ABC3 during the boom luffing process of the present invention.

[0036] Figure 3 This is a schematic diagram of the mounting base on the rotary platform in the present invention.

[0037] Figure 4This is a side view of the mounting seat and guide pulley frame of the present invention installed on the rotary platform.

[0038] Figure 5 It is the workflow diagram of the present invention.

[0039] Figure 6 It is a structural schematic diagram of the guide pulley frame in the present invention.

[0040] Figure 7 It is a side view of the guide pulley frame in the present invention.

[0041] Figure 8 It is the front view of the guide pulley frame in the present invention.

[0042] Figure 9 It is a top view of the guide pulley frame in the present invention.

[0043] Figure 10 for Figure 3 Enlarged view of point A in the middle.

[0044] Figure 11 for Figure 4 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] like Figures 1 to 4 、 Figures 6 to 11 As shown, a method for installing a guide pulley and a wire rope on a boom includes two or more guide pulleys (not shown in the figure), a guide pulley frame, a mounting seat, an offset pulley (not shown in the figure) arranged on the boom 1, and a wire rope 2 wound on a winch (not shown in the figure). The guide pulley frame includes a flange plate 3, a pulley plate 11, a pulley plate 2 12, a rope guard rod 4, and two or more rib plates 1 21 and rib plates 2 22. A through hole 1 5 is provided on the pulley plate 11, and a through hole 2 6 is provided on the pulley plate 2 12, so that the guide pulley can be fixed between the pulley plate 11 and the pulley plate 2 12 by passing a fixed shaft through the through hole 1 5 and the through hole 2 6. Pulley plate 11 and pulley plate 2 12 are arranged in parallel on the flange plate 3, and pulley plate 11 is inclined on the flange plate 3 at a deflection angle b. The inclination angle c between pulley plate 11 and the flange plate 3 is equal to the deflection angle b. Since pulley plate 11 and pulley plate 2 12 are arranged in parallel, the inclination angle c between pulley plate 2 12 and the flange plate 3 is also equal to the deflection angle b. In this way, after the guide pulley is installed on the guide pulley frame, an inclination angle of the deflection angle b is generated, thereby reducing the deviation angle between the wire rope 2 and the offset pulley on the boom 1 after the rope is released, thereby reducing the friction between the wire rope 2 and the offset pulley, reducing the wear of the wire rope 2, and extending the service life of the wire rope 2.

[0047] like Figure 7 、 9 As shown, the rope guard rod 4 is arranged between the pulley plate 11 and the pulley plate 2 12. In this embodiment, the distance from the rope guard rod 4 to the center of the through hole 1 5 is greater than the radius of the guide pulley, so that the wire rope 2 passing around the guide pulley can be prevented from escaping from the rope groove of the guide pulley while ensuring the normal rope discharge.

[0048] like Figure 7 As shown, the distance from the bottom end of the pulley plate 2 12 to the center of the through hole 2 6 is greater than the distance from the bottom end of the pulley plate 11 to the center of the through hole 1 5. This ensures that after the pulley plate 1 11 and the pulley plate 2 12 are tilted at the deflection angle b on the flange plate 3, the through hole 1 5 and the through hole 2 6 are still coaxially arranged.

[0049] like Figure 6 、 7 As shown, one end of the rib plate 1 21 is fixedly connected to the pulley plate 11, the other end of the rib plate 1 21 is fixedly connected to the flange plate 3, one end of the rib plate 2 22 is fixedly connected to the pulley plate 2 12, and the other end of the rib plate 2 22 is fixedly connected to the flange plate 3. In this embodiment, the rib plate 1 21 and the pulley plate 1 11 and the rib plate 2 22 and the pulley plate 2 12 are fixedly connected by welding, so as to facilitate fixing the pulley plate 11 and the pulley plate 2 12 to the flange plate 3.

[0050] like Figure 4 、 10 As shown in , 11, the mounting seat includes a base plate 7, a rib plate 8, a fixing plate 9 and a connecting plate 10, the two ends of the fixing plate 9 are fixedly connected to the base plate 7 and the connecting plate 10 respectively, the base plate 7 is provided with more than two through holes three 73, one side of the rib plate 8 is fixedly connected to the fixing plate 9, the connecting plate 10 and the flange plate 3 are provided with more than two through holes four 34, the two ends of the rib plate 8 are fixedly connected to the base plate 7 and the connecting plate 10 respectively, so that the mounting seat can be fixed on the support plane a1 through the through hole three 73, and the guide pulley frame can be fixedly installed on the mounting seat through the through hole four 34. In addition, a rib plate 8 is arranged between the base plate 7 and the connecting plate 10 to enhance the stability of the connecting plate 10 on the mounting seat.

[0051] It also includes the following specific steps, such as Figure 5 As shown,

[0052] S1 calculates the deflection angle b of the guide pulley frame,

[0053] S1.1 With the center of the slewing platform a2 as the center of the circle, set a calibration point on the support plane a1 in the 60° to 70° angle range relative to the horizontal line a4 passing through the center O of the slewing platform a2 and close to one end of the boom 1. In this embodiment, the calibration point is set on the support plane a1 in the direction of 65° relative to the horizontal line a4, and the distance L from the calibration point to the center of the slewing platform a2 is greater than the radius r of the slewing platform a2, and less than the distance L1 from the center O of the slewing platform a2 to the minimum edge of the slewing platform a2. , the distance from the center O of the slewing platform a2 to the edge of the slewing platform a2 is L2. Since the edge of the slewing platform a2 is non-circular, the value of L2 is different at different edge points. In this embodiment, the minimum value from the center O of the slewing platform a2 to the edge of the slewing platform a2 refers to the value L1 at which the L2 value is the smallest at a certain point on the edge. Then, the mounting base is fixed at the calibration point along the length direction of the boom 1, and a guide pulley frame without a deflection angle b is installed on the mounting base, and the guide pulley is installed on the guide pulley frame without a deflection angle b.

[0054] S1.2 Select the guide pulley at the calibration point as point B, the tripod top pulley as point A, the offset pulley on the boom at the minimum amplitude, the contact point between the offset pulley and the wire rope 2 as point C1, the offset pulley on the boom at the maximum amplitude, the contact point between the offset pulley and the wire rope 2 as point C2, and the offset pulley on the boom at the mid-amplitude as point C3.

[0055] S1.3 Pass the wire rope 2 from the winch around the pulley at the top of the tripod a3, then around the guide pulley and connect it to the offset pulley of the boom 1, driving the boom 1 to rotate within the luffing range. Then, measure the angle a between plane ABC1, where the wire rope is located, at the minimum luffing value of the boom 1, and plane ABC2, where the wire rope 2 is located, at the maximum luffing value. In this embodiment, the angle a between planes ABC1 and ABC2 is measured to be 8°. The deflection angle b of the guide pulley frame is calculated based on the angle a. In this embodiment, the deflection angle b is calculated as follows:

[0056] ;

[0057] The calculated deflection angle b is 4°.

[0058] S2 assembles the guide pulley frame according to the deflection angle b in step S1,

[0059] S2.1 Place flange plate 3 on a reference horizontal plane, then secure pulley plate 11 to a manipulator that rotates with a motor, which is mounted on a telescopic rod that can move up and down.

[0060] S2.2: Use the telescopic rod to move the pulley plate 11 until the bottom end of the pulley plate 11 contacts the flange plate 3;

[0061] S2.3 The motor drives the manipulator to rotate, thereby driving the pulley plate 11 to rotate around the point of contact with the flange plate 3 until the inclination angle c between the pulley plate 11 and the flange plate 3 is equal to the deflection angle b, at which point the motor stops operating.

[0062] S2.4 Spot weld the joints between pulley plate 11 and flange plate 3, then remove pulley plate 11 from the manipulator and repeat steps S2.1 to S2.3 to weld pulley plate 2 12;

[0063] S2.5 Completely weld the pulley plate 11 and the pulley plate 2 12, then weld the rope guard rod 4 between the pulley plate 11 and the pulley plate 2 12, and then weld the rib plate 1 21 between the flange plate 3 and the pulley plate 1 11, and weld the rib plate 2 22 between the flange plate 3 and the pulley plate 2 12, and assemble the guide pulley frame with the deflection angle b.

[0064] S3: Place the mounting base on a reference horizontal surface, ensuring that the base plate 7 of the mounting base is perpendicular to the horizontal plane. Then, using the mounting base's connecting plate 10 as a reference, pass the wire rope through the through-hole 1 (5) provided in pulley plate 11 and pulley plate 2 (12). Use a mobile single-arm hoist to lift the guide pulley frame and move it above connecting plate 10, aligning the center of connecting plate 10 with the center of flange plate 3 on the same axis. In this embodiment, the mobile single-arm hoist is conventional technology and will not be described in detail here.

[0065] S4 controls the mobile single-arm crane to lower the wire rope, causing the guide pulley frame to descend along the axis of flange plate 3. After flange plate 3 abuts connecting plate 10, fasteners are inserted through four through-holes 73 provided in connecting plate 3 and flange plate 10, securing connecting plate 3 and flange plate 10 together. In this embodiment, the fasteners are bolts and nuts, which are secured by the bolts passing through four through-holes 73 and engaging with the nuts.

[0066] S5 determines the position of the mounting base within the support plane, and then uses the base plate 7 of the mounting base as a reference to ensure that the base plate 7 is perpendicular to the support plane a1, and that the deflected side of the guide pulley frame is close to the horizontal line a4 passing through the center O of the rotary platform a2, and also includes steps S5.1 to S5.2.

[0067] S5.1 Construct plane ABC3 through the midpoint of angle a so that plane ABC3 intersects the support plane and forms an intersecting line a3 on support plane a1;

[0068] S5.2 As Figure 3As shown, with the center of the rotary platform a2 as the center of the circle, a straight line a5 is drawn through the center of the circle within the support plane a1 within an angle range of 60° to 70°. In this embodiment, the angle e between the straight line a5 and the horizontal line a4 passing through the center of the rotary platform a2 is 65°, so that the straight line a5 intersects with the intersecting straight line a3, and the intersecting straight line a3 forms an angle d with the horizontal line a4 passing through the center of the rotary platform a2. The angle d is 5.5°, and the intersection is determined to be the position of the mounting seat so that the center of the mounting seat base plate 7 coincides with the intersection.

[0069] S6 uses fasteners to pass through the through hole three set on the base plate to fix the base plate to the support plane, and then fix the guide pulley frame and the mounting seat to the rotary platform to form a whole. Finally, the guide pulley is installed on the guide pulley frame with a deflection angle b to complete the installation.

[0070] The working principle of the present invention is as follows: first, the guide pulley frame is installed on the mounting seat with the connecting plate of the mounting seat as the reference, and the guide pulley frame is integrated with the mounting seat. Then, the guide pulley frame and the mounting seat are fixedly installed on the support plane with the bottom plate of the mounting seat as the reference. Since the bottom plate of the mounting seat and the connecting plate are coaxial and parallel to each other, they are all installed with the mounting seat as the installation reference, which ensures that the guide pulley frame is parallel to the mounting seat, and the support plane is also parallel to the mounting seat, thereby ensuring that the guide pulley frame is parallel to the support plane, thereby avoiding the guide pulley frame from tilting after installation and failing to ensure that the inclination angle of the pulley installed on the guide pulley frame is the same as the deflection angle of the guide pulley frame. The installation method is reliable and simple and convenient to operate.

Claims

1. A method for installing a guide pulley and a wire rope on a boom, comprising a mounting base and a guide pulley frame, wherein the mounting base is provided with a bottom plate at the bottom, a connecting plate is provided at the top of the mounting base, and a flange plate is provided at the bottom of the guide pulley frame, wherein the bottom plate and the connecting plate are coaxial and parallel to each other; characterized in that: The following steps are also included: S1 calculates the deflection angle of the guide pulley frame, including S1.1 to S1.3; S1.1 Using the center of the slewing platform as the circle center reference, set a calibration point on the support plane located in the 60° to 70° angle range, ensuring that the distance from the calibration point to the center of the slewing platform is greater than the radius of the slewing platform. Then, secure the mounting base at the calibration point, install a guide pulley frame with no deflection angle b on the mounting base, and install the guide pulley on the guide pulley frame with no deflection angle b. S1.2 Select the guide pulley at the calibration point as point B, the tripod top pulley on the slewing platform as point A, the contact point between the offset pulley and the wire rope when the boom is at its minimum amplitude as point C1, the contact point between the offset pulley and the wire rope when the boom is at its maximum amplitude as point C2, and the contact point between the offset pulley and the wire rope when the boom is at its mid-amplitude as point C3. S1.3 Drive the boom to rotate within the boom range, then measure the angle a between the plane ABC1 where the wire rope is located when the boom is at its minimum value and the plane ABC2 where the wire rope is located when the boom is at its maximum value, and calculate the deflection angle b of the guide pulley frame. The calculation formula for the deflection angle b is as follows: ； S2 assembles the guide pulley frame according to the deflection angle in step S1; S3 Place the mounting base on the reference horizontal plane, ensuring that the base plate of the mounting base is perpendicular to the horizontal plane. Then, using the connecting plate of the mounting base as a reference, lift the guide pulley frame and place it above the connecting plate, ensuring that the center of the connecting plate and the center of the flange plate are on the same axis. S4 hoists the guide pulley frame and lowers it along the axis of the flange plate. After the flange plate abuts against the connecting plate, a fastener is passed through the through hole four provided on the connecting plate and the flange plate to fix the connecting plate and the flange plate together. S5: Determine the position of the mounting base within the support plane, and then use the base plate of the mounting base as a reference to ensure that the base plate is perpendicular to the support plane, and that the deflected side of the guide pulley frame is close to the horizontal line passing through the center of the slewing platform; S6 uses fasteners to pass through the through hole three set on the base plate to fix the base plate to the support plane, and then fix the guide pulley frame and the mounting seat to the rotary platform to form a whole. Finally, the guide pulley is installed on the guide pulley frame to complete the installation.

2. The method for installing a guide pulley and a steel wire rope on a boom according to claim 1, characterized in that: The step S2 also includes S2.1 to S2.5, S2.1 Place the flange plate on a reference horizontal plane. Then, secure a pulley plate, which is tilted at an angle b on the flange plate, to a manipulator that rotates with a motor. The motor is mounted on a telescopic rod that can move up and down. S2.2: The pulley plate 1 is driven to move by the telescopic rod until the bottom end of the pulley plate 1 contacts the flange plate; S2.3 The motor drives the manipulator to rotate, thereby driving the pulley plate 1 to rotate around the point where it abuts the flange plate, until the inclination angle c between the pulley plate 1 and the flange plate equals the deflection angle b, at which point the motor stops operating; S2.4 Spot weld the joints between pulley plate 1 and the flange plate, then remove pulley plate 1 from the manipulator and repeat steps S2.1 to S2.3 to weld pulley plate 2, which is tilted on the flange plate at an angle b. S2.5 Completely weld pulley plate 1 and pulley plate 2, then weld the rope guard rod between pulley plate 1 and pulley plate 2, weld rib plate 1 between flange plate and pulley plate 1, and weld rib plate 2 between flange plate and pulley plate 2, and assemble the guide pulley frame with a deflection angle b.

3. The method for installing a guide pulley and a steel wire rope on a boom according to claim 1, characterized in that: The step S3 further includes passing the steel wire rope through the through hole 1 provided on the pulley plate 1 and the pulley plate 2, and lifting the guide pulley frame by a mobile single-arm hoist and moving it to above the connecting plate.

4. The method for installing a guide pulley and a steel wire rope on a boom according to claim 1, wherein: The step S4 further includes controlling the mobile single-arm hoist to lower the wire rope so that the guide pulley frame descends along the axis direction of the flange plate.

5. The method for installing a guide pulley and a steel wire rope on a boom according to claim 1, characterized in that: Determining the position of the mounting base in step S5 includes steps S5.1 to S5.

2. S5.1 Construct plane ABC3 through the median of angle a so that plane ABC3 intersects the support plane and forms an intersecting straight line on the support plane; S5.2 With the center of the slewing platform as the center of the circle, draw a straight line within the support plane within the angle range of 60°~70° through the center of the circle so that the straight line intersects the intersecting straight line. The intersection is the location of the mounting base.

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