Installation method of guide pulley and steel wire rope on suspension arm

Abstract

The invention provides a method for mounting a guide pulley and a steel wire rope on a suspension arm, which comprises the following steps of: mounting a guide pulley yoke on a mounting seat by taking a connecting plate of the mounting seat as a reference, forming a whole with the mounting seat, and fixedly mounting the guide pulley yoke and the mounting seat on a support plane by taking a bottom plate of the mounting seat as a reference. Due to the fact that the bottom plate of the installation base and the connecting plate are coaxial and parallel to each other and are installed with the installation base as the installation reference, it can be ensured that the guide pulley yoke is arranged on the installation base in parallel, the plane of the support is parallel to the installation base, and then it is ensured that the guide pulley yoke is parallel to the plane of the support. Therefore, the situation that the inclination angle of the pulley installed on the guide pulley yoke is the same as the deflection angle of the guide pulley yoke due to inclination of the guide pulley yoke after installation is avoided, and the installation method is reliable and easy and convenient to operate.

Description

Technical Field

[0001] The 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, which mainly consists of a guide The winch 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 formed 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 the top of the mechanical equipment to complete the heavy lifting operation.

[0003] The above 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 set a deflection angle, 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 angle changes 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 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 wire rope is changed. The installation method is reliable and easy to operate.

[0005] To achieve the above object, a method for installing a guide pulley and a wire rope on a boom includes a mounting seat and a guide pulley frame, wherein a bottom plate is provided at the bottom of the mounting seat, a connecting plate is provided at the top of the mounting seat, a flange plate is provided at the bottom of the guide pulley frame, and the bottom plate and the connecting plate are coaxial and parallel to each other; The following steps are also included: S1 calculates the deflection angle of the guide pulley frame; S2 assembling the guide pulley frame according to the deflection angle in step S1; S3 Place the mounting base on the reference horizontal plane, ensure that the base plate of the mounting base is perpendicular to the horizontal plane, then take the connecting plate of the mounting base as the reference, lift the guide pulley frame above the connecting plate, and make the center of the connecting plate and the center of the flange plate on the same axis; S4 hoists the guide pulley frame and lowers it along the axis direction 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 determines the position of the mounting seat in the support plane, and then takes the bottom plate of the mounting seat as a reference to ensure that the bottom plate is vertically arranged with the support plane, and that the inclined side of the guide pulley frame is arranged close to the horizontal line passing through the center of the rotary platform; S6 uses fasteners to pass through the through hole three set on the bottom plate to fix the bottom plate on the support plane, and then fix the guide pulley frame and the mounting seat on the rotating platform to form a whole, and finally install the guide pulley on the guide pulley frame to complete the installation.

[0006] 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. Furthermore, the step S1 also includes S1.1 to S1.3, S1.1 Taking the center of the slewing platform as the circle center reference, set a calibration point on the support plane located in the 60°~70° angle range, so that the distance from the calibration point to the center of the slewing platform is greater than the radius of the slewing platform, then fix the mounting seat at the calibration point, install a guide pulley frame without a deflection angle on the mounting seat, and install the guide pulley on the guide pulley frame without a deflection angle; 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 change, the offset pulley and the wire rope contact point as point C1, the offset pulley on the boom at the maximum amplitude change, the offset pulley and the wire rope contact point as point C2, the offset pulley on the boom at the mid-amplitude change, the offset pulley and the wire rope contact point as point C3; S1.3 drives the boom to rotate within the range of amplitude change, and then measures the angle a between the plane ABC1 where the wire rope is located when the boom is at the minimum value and the plane ABC2 where the wire rope is located when the boom is at the maximum value during the amplitude change process, and calculates the deflection angle b of the guide pulley frame. The calculation formula of the deflection angle b is as follows: .

[0007] 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 pile leg of the tripod. Since the angle of the wire rope will 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 taken, and half of the angle a is taken 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.

[0008] Furthermore, the step S2 also includes S2.1 to S2.5, S2.1 Place the flange plate on the reference horizontal plane, and then fix the pulley plate 1 on the manipulator that can rotate with the motor, and the motor is installed on the telescopic rod that can move up and down; S2.2 drives the pulley plate 1 to move by the telescopic rod until the bottom end of the pulley plate 1 abuts against the flange plate; S2.3 drives the manipulator to rotate through the motor, and then drives the pulley plate 1 to rotate around the abutment with the flange plate, until the inclination angle c between the pulley plate 1 and the flange plate is equal to the deflection angle b, and the motor stops working; S2.4 spot weld the joint between the pulley plate 1 and the flange plate, then remove the pulley plate 1 from the manipulator, repeat steps S2.1 to S2.3, and weld the pulley plate 2; S2.5 Completely weld the pulley plate 1 and the pulley plate 2, then weld the rope guard rod between the pulley plate 1 and the pulley plate 2, then weld the rib plate 1 between the flange plate and the pulley plate 1, and weld the rib plate 2 between the flange plate and the pulley plate 2, and assemble the guide pulley frame with the deflection angle b.

[0009] The above arrangement makes it easy for the inclination angle between the flange plate and the pulley plate 1 to be equal to the deflection angle b on the assembled guide pulley frame.

[0010] Furthermore, the step S3 also includes passing the steel wire rope through the through hole 1 set on the pulley plate 1 and the pulley plate 2, and lifting the guide pulley frame to the top of the connecting plate by the mobile single-arm hoist. The above arrangement facilitates moving the guide pulley frame from other positions to the top of the connecting plate.

[0011] 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 axial direction of the flange plate.

[0012] The above arrangement facilitates adjustment of the moving height of the guide pulley frame and ensures that the guide pulley frame is coaxially installed with the mounting seat.

[0013] Furthermore, the step S5 of determining the position of the mounting seat includes steps S5.1 to S5.2. S5.1 Construct plane ABC3 through the median value of angle a so that plane ABC3 intersects with the support plane and forms an intersecting straight line on the support plane; S5.2 Take the center of the slewing platform as the center of the circle, and draw a straight line in the support plane within the angle range of 60°~70° through the center of the circle, so that the straight line intersects with the intersecting straight line, and the intersection is the position of the mounting seat.

[0014] The above arrangement facilitates installation of the mounting base after the position of the mounting base is determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of plane ABC1, plane ABC2 and plane ABC3 determined during the boom luffing process in the present invention.

[0016] Figure 2 It is a top view of plane ABC1, plane ABC2 and plane ABC3 determined during the boom luffing process in the present invention.

[0017] Figure 3 It is a schematic diagram of the mounting seat on the rotary platform in the present invention.

[0018] Figure 4 It is a side view of the mounting seat and the guide pulley frame of the present invention installed on the rotating platform.

[0019] Figure 5 It is the work flow chart of the present invention.

[0020] Figure 6 It is a structural schematic diagram of the guide pulley frame in the present invention.

[0021] Figure 7 It is a side view of the guide pulley frame in the present invention.

[0022] Figure 8 It is the front view of the guide pulley frame in the present invention.

[0023] Fig. 9 It is a top view of the guide pulley frame in the present invention.

[0024] Fig.10 for Figure 3Enlarged view of point A in the middle.

[0025] Fig.11 for Figure 4 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] 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 more than two guide pulleys (not marked in the figure), a guide pulley frame, a mounting seat, an offset pulley (not marked in the figure) arranged on the boom 1, and a wire rope 2 wound on a winch (not marked in the figure), wherein the guide pulley frame includes a flange plate 3, a pulley plate 11, a pulley plate 2 12, a rope guard rod 4, and more than two rib plates 1 21, rib plates 2 22, a through hole 1 5 is provided on the pulley plate 1 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 1 11 and the pulley plate 2 12 by passing a fixed shaft through the through hole 1 5 and the through hole 2 6, and the pulley plate Pulley plate 11 and pulley plate 2 12 are arranged in parallel on the flange plate 3, and the pulley plate 11 is inclined on the flange plate 3 at a deflection angle b. The inclination angle c between the pulley plate 11 and the flange plate 3 is equal to the deflection angle b. Since the pulley plate 11 and the pulley plate 2 12 are arranged in parallel, the inclination angle c between the 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 wire rope 2 is unwound, 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.

[0028] 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 that passes around the guide pulley can be prevented from escaping from the rope groove of the guide pulley while ensuring the normal rope discharge.

[0029] 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 1 11 to the center of the through hole 1 5, so that it can be ensured 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.

[0030] like Figure 6 , 7As shown, one end of the rib plate 21 is fixedly connected to the pulley plate 11, the other end of the rib plate 21 is fixedly connected to the flange plate 3, one end of the rib plate 22 is fixedly connected to the pulley plate 2 12, and the other end of the rib plate 22 is fixedly connected to the flange plate 3. In this embodiment, the rib plate 21 and the pulley plate 11 and the rib plate 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.

[0031] like Figure 4 , 10 As shown in Figures 1 and 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 holes three 73, and the guide pulley frame can be fixedly installed on the mounting seat through the through holes four 34. In addition, the 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.

[0032] It also includes the following specific steps, such as Figure 5 As shown, S1 calculates the deflection angle b of the guide pulley frame, S1.1 With the center of the rotary platform a2 as the center of the circle, a calibration point is set on the support plane a1 in the 60°~70° angle range relative to the horizontal line a4 passing through the center O of the rotary 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 rotary platform a2 is greater than the radius r of the rotary platform a2, and less than the distance L1 from the center O of the rotary platform a2 to the minimum value of the edge of the rotary platform a2 , the distance from the center O of the rotary platform a2 to the edge of the rotary platform a2 is L2. Since the edge of the rotary platform a2 is non-circular, the value of L2 is different for different edge points. In this embodiment, the minimum value from the center O of the rotary platform a2 to the edge of the rotary platform a2 refers to the value L1 when the L2 value is the smallest at a certain point on the edge. Then, the mounting seat 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 seat, and the guide pulley is installed on the guide pulley frame without a deflection angle b; S1.2 Select the guide pulley at the calibration point as point B, the tripod top pulley as point A, when the offset pulley on the boom is at the minimum amplitude change, select the contact point between the offset pulley and the wire rope 2 as point C1, when the offset pulley on the boom is at the maximum amplitude change, select the contact point between the offset pulley and the wire rope 2 as point C2, when the offset pulley on the boom is at the midpoint amplitude change, select the contact point between the offset pulley and the wire rope 2 as point C3; S1.3 The wire rope 2 on the winch is passed around the pulley on the top of the tripod a3, and then passed around the guide pulley to be connected to the offset pulley of the boom 1, driving the boom 1 to rotate within the amplitude variation range, and then measuring the angle a between the plane ABC1 where the wire rope is located when the amplitude variation of the boom 1 is the minimum value and the plane ABC2 where the wire rope 2 is located when the amplitude variation is the maximum value. In this embodiment, the angle a between the plane ABC1 and the plane ABC2 is measured to be 8°, and the deflection angle b of the guide pulley frame is calculated by the angle a. In this embodiment, the calculation formula of the deflection angle b is as follows: ; The deflection angle b is calculated to be 4°.

[0033] S2 assembles the guide pulley frame according to the deflection angle b in step S1, S2.1 Place the flange plate 3 on the reference horizontal plane, and then fix the pulley plate 11 on a manipulator that can rotate with the motor, and the motor is installed on a telescopic rod that can move up and down; S2.2 The pulley plate 11 is driven to move by the telescopic rod until the bottom end of the pulley plate 11 abuts against the flange plate 3; S2.3 The motor drives the manipulator to rotate, thereby driving the pulley plate 11 to rotate around the abutment 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, and the motor stops working; S2.4 spot welding is performed at the joint of the pulley plate 11 and the flange plate 3, and then the pulley plate 11 is removed from the manipulator, and steps S2.1 to S2.3 are repeated to weld the pulley plate 2 12; 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, 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.

[0034] S3 places the mounting base on the reference horizontal plane, ensures that the bottom plate 7 of the mounting base is perpendicular to the horizontal plane, and then takes the connecting plate 10 of the mounting base as a reference, passes the steel wire rope through the through hole 15 set on the pulley plate 11 and the pulley plate 2 12, and hoists the guide pulley frame to the top of the connecting plate 10 by the mobile single-arm hoist, so that the center of the connecting plate 10 and the center of the flange plate 3 are on the same axis. In this embodiment, the mobile single-arm hoist is a prior art and will not be described in detail here.

[0035] S4 controls 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 3. After the flange plate 3 abuts against the connecting plate 10, the connecting plate 3 and the flange plate 10 are fixedly connected to form a whole by fasteners passing through the through holes 73 9 provided on the connecting plate 3 and the flange plate 10. In this embodiment, the fasteners are bolts and nuts, and the bolts pass through the through holes 73 9 and cooperate with the nuts to achieve fixed connection.

[0036] S5 determines the position of the mounting seat in the support plane, and then takes the bottom plate 7 of the mounting seat as a reference, ensures that the bottom plate 7 is vertically arranged with the support plane a1, and makes the inclined side of the guide pulley frame close to the horizontal line a4 passing through the center O of the rotary platform a2, and also includes steps S5.1~S5.2, S5.1 Construct plane ABC3 through the median of angle a, so that plane ABC3 intersects with the support plane and forms an intersecting straight line a3 on the support plane a1; S5.2 As Figure 3 As shown, with the center of the rotating platform a2 as the center of the circle, in the support plane a1, a straight line a5 is drawn through the center of the circle within the angle range of 60°~70°. In this embodiment, the angle e between the straight line a5 and the horizontal line a4 passing through the center of the rotating platform a2 is 65°, so that the straight line a5 intersects with the intersecting straight line a3, and the intersecting straight line a3 and the horizontal line a4 passing through the center of the rotating platform a2 form an angle d, and the angle d is 5.5°, and the intersection is determined as the position of the mounting seat, so that the center of the mounting seat bottom plate 7 coincides with the intersection.

[0037] S6 uses fasteners to pass through the through hole three set on the bottom plate to fix the bottom plate on the support plane, and then fix the guide pulley frame and the mounting seat on the rotating platform to form a whole, and finally install the guide pulley on the guide pulley frame with a deflection angle b to complete the installation.

[0038] The working principle of the present invention is as follows: first, the connecting plate of the mounting seat is used as a reference to install the guide pulley frame on the mounting seat to form an integral body with the mounting seat, and then, the bottom plate of the mounting seat is used 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. The installation method is reliable and the operation is simple and convenient.

Claims

1. A method for installing a guide pulley and a wire rope on a boom, comprising a mounting seat and a guide pulley frame, wherein a bottom plate is provided at the bottom of the mounting seat, a connecting plate is provided at the top of the mounting seat, a flange plate is provided at the bottom of the guide pulley frame, and 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; S2 assembling the guide pulley frame according to the deflection angle in step S1; S3 Place the mounting base on the reference horizontal plane, ensure that the base plate of the mounting base is perpendicular to the horizontal plane, then take the connecting plate of the mounting base as the reference, lift the guide pulley frame above the connecting plate, and make the center of the connecting plate and the center of the flange plate on the same axis; S4 hoists the guide pulley frame and lowers it along the axis direction 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 determines the position of the mounting seat in the support plane, and then takes the bottom plate of the mounting seat as a reference to ensure that the bottom plate is vertically arranged with the support plane, and that the inclined side of the guide pulley frame is arranged close to the horizontal line passing through the center of the rotary platform; S6 uses fasteners to pass through the through hole three set on the bottom plate to fix the bottom plate on the support plane, and then fix the guide pulley frame and the mounting seat on the rotating platform to form a whole, and finally install the guide pulley 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 S1 also includes S1.1 to S1.3, S1.1 Taking the center of the slewing platform as the circle center reference, set a calibration point on the support plane located in the angle range of 60°~70°, so that the distance from the calibration point to the center of the slewing platform is greater than the radius of the slewing platform, then fix the mounting seat at the calibration point, and install a guide pulley frame without a deflection angle b on the mounting seat, and install the guide pulley on the guide pulley frame without a deflection angle b; 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 change, the offset pulley and the wire rope contact point as point C1, the offset pulley on the boom at the maximum amplitude change, the offset pulley and the wire rope contact point as point C2, the offset pulley on the boom at the mid-amplitude change, the offset pulley and the wire rope contact point as point C3; S1.3 drives the boom to rotate within the range of amplitude change, and then measures the angle a between the plane ABC1 where the wire rope is located when the boom is at the minimum value and the plane ABC2 where the wire rope is located when the boom is at the maximum value during the amplitude change process, and calculates the deflection angle b of the guide pulley frame. The calculation formula of the deflection angle b is as follows: 。 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 S2 also includes S2.1 to S2.5, S2.1 Place the flange plate on the reference horizontal plane, and then fix the pulley plate 1 on the manipulator that can rotate with the motor, and the motor is installed on the telescopic rod that can move up and down; S2.2 drives the pulley plate 1 to move by the telescopic rod until the bottom end of the pulley plate 1 abuts against the flange plate; S2.3 drives the manipulator to rotate through the motor, and then drives the pulley plate 1 to rotate around the abutment with the flange plate, until the inclination angle c between the pulley plate 1 and the flange plate is equal to the deflection angle b, and the motor stops working; S2.4 spot weld the joint between the pulley plate 1 and the flange plate, then remove the pulley plate 1 from the manipulator, repeat steps S2.1 to S2.3, and weld the pulley plate 2; S2.5 Completely weld the pulley plate 1 and the pulley plate 2, then weld the rope guard rod between the pulley plate 1 and the pulley plate 2, then weld the rib plate 1 between the flange plate and the pulley plate 1, and weld the rib plate 2 between the flange plate and the pulley plate 2, and assemble the guide pulley frame with the deflection angle b.

4. 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 also 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 the mobile single-arm hoist and moving it to the top of the connecting plate.

5. The method for installing a guide pulley and a steel wire rope on a boom according to claim 1, characterized in that: 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.

6. 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 seat in step S5 includes steps S5.1 to S5.

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

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