Catenary crane with double-dynamic pulley block cooperative double-hoist control and application method thereof

Abstract

The application discloses a double-movable pulley set cooperative double-hoist control arm support device and an application method thereof, and comprises an arm support, a first hoist arranged on one side of the arm support, a second hoist arranged on the same side of the first hoist, a first steel wire rope arranged on the first hoist, a second steel wire rope arranged on the second hoist, a fixed pulley assembly arranged on the top of the arm support and a double-movable pulley assembly arranged on the other side of the arm support. The fixed pulley assembly is arranged, so that the first steel wire rope and the second steel wire rope in the double hoist have independent construction installation routes respectively, and the two are guaranteed to be cooperative and independent. The double-movable pulley assembly is arranged, so that the connection of the steel wire rope and the power head or the lifting hook is guaranteed, and the power head lifting hook is jointly lifted, and the steel wire rope can continue to bear force safely after one steel wire rope is damaged, and the safety of construction operators is greatly guaranteed. The first steel wire rope and the second steel wire rope can be fine-tuned according to the construction site conditions to adapt to the force on the site.

Description

Technical Field

[0001] This invention relates to the field of boom device application technology, and in particular to a boom device with dual-acting pulley block cooperative dual-winch control and its application method. Background Technology

[0002] In conventional construction machinery, when cranes or pile drilling rigs apply pressure or lift the power head or heavy objects on the boom, if the wire rope becomes fatigued or mechanically damaged and the operator does not replace it in time, the winch may break when lifting the power head or heavy objects, leading to very serious consequences. For safety reasons, some construction machinery also uses double winches to lift a heavy object together. For example, two winches are used to lift a rectangular double-wheel milling drill bit. However, these two winches drive two wire ropes down from two fixed pulley groups that are parallel and coaxial on the top of the milling machine, and then fix them to two symmetrical fixed points on the same horizontal axis on the top of the milling drill bit or to two movable pulleys on the same shaft. As a result, these two symmetrical double winch mechanisms are always in a seesaw working state during operation. In existing systems, the mechanical components and hydraulic control systems of the two winches must be completely symmetrical and identical during design and manufacturing to ensure the milling drill bit operates stably when pulled by the respective wire ropes of the two winches. Even with identical mechanical and hydraulic motors, the hydraulic system still requires real-time adjustment mechanisms due to uneven external forces. Therefore, if one of the two wire ropes in this dual-winch mechanism breaks during operation, the parallel and vertically aligned dual-wheel milling drill bit will tilt. A tilted drill bit falling into the underground trench is difficult to retrieve from the surface and poses a significant safety hazard. Thus, there is an urgent need to design a boom device that features convenient and coordinated control for dual-winch construction, prevents instability after breakage, and ensures balanced force distribution during use. Summary of the Invention

[0003] This invention provides a boom device with dual-acting pulley block cooperative dual-winch control and its application method, which solves technical problems such as convenient cooperative control of dual-winch construction, prevention of instability after breakage, and force balance during use in boom device applications.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A boom device with a double-acting pulley block cooperative double winch control includes a boom, a first winch disposed on one side of the boom, a second winch disposed on the same side as the first winch, a first wire rope disposed on the first winch, a second wire rope disposed on the second winch, a fixed pulley assembly disposed on the top of the boom, and a double-acting pulley assembly disposed on the other side of the boom. The fixed pulley assembly includes a fixed pulley frame, a rear first fixed pulley and a rear second fixed pulley disposed on the side of the fixed pulley frame near the first winch, a front first fixed pulley and a front second fixed pulley disposed on the fixed pulley frame and away from the first winch, a first fixing point disposed below the front second fixed pulley, and a second fixing point disposed below the front first fixed pulley. The double movable pulley assembly includes a movable pulley frame, a first movable pulley disposed on the upper part of the movable pulley frame, and a second movable pulley located directly below the first movable pulley; the first wire rope extends from the first winch and is sequentially connected to the rear first fixed pulley, the front first fixed pulley, and the first movable pulley, and then connected to the first fixed point; After extending from the second winch, the second wire rope is connected in sequence to the rear second fixed pulley, the front second fixed pulley, and the second movable pulley, and then connected to the second fixed point; The diameter of the first movable pulley is smaller than that of the second movable pulley, and the difference in their diameters corresponds to the spacing between the first wire rope and the second wire rope; wherein the first wire ropes on both sides of the first movable pulley are positioned between the second wire ropes on both sides of the second movable pulley.

[0005] Furthermore, both the first winch and the second winch are equipped with power units and are connected in parallel. Their operating speeds correspond to the synchronous lifting and lowering of the first and second fixed pulleys, respectively. The strength of each of the first and second wire ropes is not less than the strength required for the safety design in construction applications.

[0006] Furthermore, the rear first fixed pulley and the front first fixed pulley are arranged correspondingly in the horizontal direction, and their top surfaces are flush or inclined and connected to the first steel wire rope. The second fixed pulley at the rear and the second fixed pulley at the front are set horizontally and upwards respectively. Their top surfaces are flush or inclined and connected to the second wire rope.

[0007] Furthermore, the first wire rope is arranged vertically or inclined on both sides of the first movable pulley, and the second wire rope is arranged vertically or inclined on both sides of the second movable pulley, and the first wire rope and the second wire rope are in the same vertical plane; The tilt settings of the first and second wire ropes both meet the force requirements of the lifting design of the fixed pulley assembly.

[0008] Furthermore, the distance between the first fixed point and the perpendicular line from the point of tangency of the first fixed pulley on the side away from the boom is not less than the outer diameter of the first movable pulley; The distance between the second fixed point and the perpendicular line from the outer tangent point of the second fixed pulley on the side away from the boom is not less than the outer diameter of the second movable pulley.

[0009] Furthermore, the axles of the first and second movable pulleys are arranged parallel to each other vertically and are integrally connected by a movable pulley frame; the diameter of the first movable pulley is smaller than the diameter of the second movable pulley, and the difference in their diameters corresponds to the spacing when the first and second wire ropes are arranged perpendicularly.

[0010] Furthermore, a connector is also connected to the lower part of the movable pulley frame, and the connector is detachably connected to the power head; a slider is connected between the power head and the boom; the connector is located directly below the second movable pulley and is connected to the power head through a coupling. Alternatively, a hook may be connected to the bottom of the pulley assembly via a connector.

[0011] Furthermore, the boom includes a pile driver boom frame and a hoisting machine boom, with corresponding connectors for the drilling rig power head, drilling rig power head, or hook.

[0012] Furthermore, the application method of the boom device with double-acting pulley block cooperative double winch control is as follows: Step 1: Determine the model of the first wire rope and the second wire rope according to the wire rope strength required by the safety design for construction application; the strength of each of the first wire rope and the second wire rope shall not be less than the strength required by the safety design for construction application. Step 2: Connect the first winch and the second winch in parallel, and control their power devices to make the first and second movable pulleys rise and fall at the same speed; Step 3: Install the fixed pulley assembly on the boom, then install the power head or hook, and the double movable pulley assembly; so that the first wire rope extends from the first winch and connects in sequence to the rear first fixed pulley, the front first fixed pulley, and the first movable pulley, and then connects to the first fixed point; so that the second wire rope extends from the second winch and connects in sequence to the rear second fixed pulley, the front second fixed pulley, and the second movable pulley, and then connects to the second fixed point; Step 4: Align the first and second wire ropes to be in the same vertical plane. If not, adjust the positions of the first and second fixed points to meet the design requirement that the first and second wire ropes are in the same vertical plane. Step 5: During use, the power head or hook should always be in a vertical position. If either the first or second wire rope breaks, the power head or hook should remain stable, and the strength of a single first or second wire rope should still meet the safety requirements for lifting. Then, replace or repair the damaged first or second wire rope until the construction is completed.

[0013] Furthermore, the fixed pulley assembly is rotatably connected to the boom via a pivot, and the fixed pulley frame is also connected to the boom by a telescopic diagonal bar; the diagonal bar is an automatic telescopic bar, the extension amount of which is set according to the design position of the fixed pulley assembly and can be finely adjusted in conjunction with the first and second wire ropes during installation; After the automatic telescopic rod is adjusted, the rotation of the limit pulley assembly is stopped to keep it fixed during use.

[0014] The beneficial effects of this invention are reflected in: This invention, through the setting of the fixed pulley assembly, ensures that the first and second wire ropes in the double winch have their own independent construction and installation routes, guaranteeing both coordination and independence. The double movable pulley assembly ensures the connection between the wire rope and the power head or hook, while the first and second movable pulleys ensure that both can jointly raise and lower the power head or hook, and that even if one wire rope is damaged, it can continue to bear load safely, greatly ensuring the safety of construction personnel. Furthermore, the setting of the first and second fixed points and the diagonal brace allows for fine-tuning of the vertical angles of the first and second wire ropes according to the construction site conditions, making them more rationally and evenly adapted to the on-site forces.

[0015] Therefore, this application solves the technical problems of boom devices and their application methods, such as convenient and coordinated control of dual-winch construction, prevention of instability after breakage, and balanced force during use. Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention; the main objectives and other advantages of the invention can be realized and obtained by means of the methods particularly pointed out in the description. Attached Figure Description

[0016] Figure 1 This is a side view of the boom device with dual-acting pulley block coordinated dual-winch control. Figure 2 This is a side view of the boom device being lowered using a dual-acting pulley block coordinated dual-winch control system. Figure 3 This is a partial schematic diagram of the lifting mechanism of the boom device with dual-acting pulley block coordinated dual-winch control; Figure 4 This is a schematic diagram of the double-acting pulley assembly.

[0017] Reference numerals in the attached drawings: 1-First winch, 2-Second winch, 3-First wire rope, 4-Second wire rope, 5-Fixed pulley assembly, 51-Fixed pulley frame, 52-Rear first fixed pulley, 53-Rear second fixed pulley, 54-Front first fixed pulley, 55-Front second fixed pulley, 56-First fixed point, 57-Second fixed point, 6-Double moving pulley assembly, 61-First moving pulley, 62-Second moving pulley, 63-Moving pulley frame, 64-Connector, 7-Arm, 8-Power head, 9-Slider, 10-Diagonal bar. Detailed Implementation

[0018] The technical solutions of the present invention will be described in detail below through embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solutions of the present invention, and should not be construed as limiting the technical solutions of the present invention.

[0019] Taking a certain pile driver as an example, such as Figures 1 to 4 As shown, the boom device of the double-acting pulley block cooperative double winch control includes a boom 7, a first winch 1 set on one side of the boom 7, a second winch 2 set on the same side as the first winch 1, a first wire rope 3 set on the first winch 1, a second wire rope 4 set on the second winch 2, a fixed pulley assembly 5 set on the top of the boom 7, a double-acting pulley assembly 6 set on the other side of the boom 7, a power head 8 set below the double-acting pulley assembly 6, and a slider 9 connecting the power head 8 and the boom 7.

[0020] In this embodiment, the fixed pulley assembly 5 includes a fixed pulley frame 51, a rear first fixed pulley 52 and a rear second fixed pulley 53 disposed on the side of the fixed pulley frame 51 near the first winch 1, a front first fixed pulley 54 and a front second fixed pulley 55 disposed on the fixed pulley frame 51 and away from the first winch 1, a first fixing point 56 disposed below the front second fixed pulley 55, and a second fixing point 57 disposed below the front first fixed pulley 54.

[0021] In this embodiment, both the first winch 1 and the second winch 2 are equipped with power devices and are connected in parallel. Their operating speeds correspond to the synchronous lifting and lowering of the first fixed pulley 54 and the second fixed pulley 55, respectively. Furthermore, the strength of each individual wire rope 3 and wire rope 4 is not less than the strength required by the power head 8 for construction application safety design.

[0022] In this embodiment, the rear first fixed pulley 52 and the front first fixed pulley 54 are arranged in a horizontal direction, with their top surfaces flush or inclined and connected to the first steel wire rope 3. The second fixed pulley 53 and the second fixed pulley 55 are arranged horizontally and upwards respectively. Their top surfaces are flush or inclined and connected to the second wire rope 4.

[0023] In this embodiment, the first wire rope 3 is arranged vertically or inclined on both sides of the first movable pulley 61, and the second wire rope 4 is arranged vertically or inclined on both sides of the second movable pulley 62, and the first wire rope 3 and the second wire rope 4 are in the same vertical plane. The inclined settings of the first wire rope 3 and the second wire rope 4 both meet the force requirements of the lifting design of the fixed pulley assembly 5.

[0024] In this embodiment, the distance between the first fixed point 56 and the perpendicular line between the first fixed pulley 54 and the outer tangent point on the side away from the boom 7 is not less than the outer diameter of the first movable pulley 61; the distance between the second fixed point 57 and the perpendicular line between the second fixed pulley 55 and the outer tangent point on the side away from the boom 7 is not less than the outer diameter of the second movable pulley 62.

[0025] In this embodiment, the double-moving pulley assembly 6 includes a moving pulley frame 63, a first moving pulley 61 disposed on the upper part of the moving pulley frame 63, and a second moving pulley 62 located directly below the first moving pulley 61; wherein, the power head 8 is connected to the lower part of the double-moving pulley assembly 6. The axles of the first moving pulley 61 and the second moving pulley 62 are arranged parallel vertically and are integrally connected through the moving pulley frame 63; the diameter of the first moving pulley 61 is smaller than the diameter of the second moving pulley 62, and the difference in their diameters corresponds to the spacing when the first wire rope 3 and the second wire rope 4 are arranged vertically. A connector 64 is also connected to the lower part of the moving pulley frame 63, which is detachably connected to the power head 8; the connector 64 is disposed directly below the second moving pulley 62 and is connected to the power head 8 through a coupling.

[0026] In this embodiment, the diameter of the first movable pulley 61 is smaller than the diameter of the second movable pulley 62, and the difference in their diameters corresponds to the spacing between the first wire rope 3 and the second wire rope 4; wherein the first wire rope 3 on both sides of the first movable pulley 61 is disposed between the second wire rope 4 on both sides of the second movable pulley 62.

[0027] Combination Figures 1 to 4 As shown, the application method of the boom device with double-acting pulley block cooperative double winch control is further explained. The specific steps are as follows: Step 1: According to the wire rope strength required by the construction application safety design, determine the model of the first wire rope 3 and the second wire rope 4 respectively; the strength of each of the first wire rope 3 and the second wire rope 4 shall not be less than the strength required by the construction application safety design 8.

[0028] Step 2: Connect the first winch 1 and the second winch 2 in parallel, and control their power devices so that the first movable pulley 61 and the second movable pulley 62 rise and fall at the same speed.

[0029] Step 3: Install the fixed pulley assembly 5 and the slider 9 on the boom 7, and then install the power head 8 and the double moving pulley assembly 6; so that the first wire rope 3 extends from the first winch 1 and is connected in sequence to the rear first fixed pulley 52, the front first fixed pulley 54, and the first moving pulley 61, and then connected to the first fixed point 56; so that the second wire rope 4 extends from the second winch 2 and is connected in sequence to the rear second fixed pulley 53, the front second fixed pulley 55, and the second moving pulley 62, and then connected to the second fixed point 57.

[0030] Step 4: Align the first wire rope 3 and the second wire rope 4 in the same vertical plane. If not, adjust the positions of the first fixing point 56 and the second fixing point 57 to meet the design requirement that the first wire rope 3 and the second wire rope 4 are in the same vertical plane.

[0031] In addition, the fixed pulley assembly 5 is rotatably connected to the boom 7 via a pivot, and the fixed pulley frame 51 is also connected to the boom 7 by a telescopic diagonal bar 10; the diagonal bar 10 is an automatic telescopic bar, the extension amount of which is set according to the design position of the fixed pulley assembly 5 and can be finely adjusted in conjunction with the first wire rope 3 and the second wire rope 4 during installation; after the automatic telescopic bar is adjusted, it limits the rotation of the fixed pulley assembly 5, so that it remains fixed during use.

[0032] Step 5: During use, the power head 8 should always be in a vertical position. If either the first wire rope 3 or the second wire rope 4 breaks, the power head 8 should remain stable, and the strength of a single first wire rope 3 or second wire rope 4 should still meet the safety requirements for hoisting. Then, the damaged first wire rope 3 or second wire rope 4 should be replaced or repaired until the construction is completed.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A boom device with dual-acting pulley block cooperative dual-winch control, characterized in that, Includes a boom (7), a first winch (1) set on one side of the boom (7), a second winch (2) set on the same side as the first winch (1), a first wire rope (3) set on the first winch (1), a second wire rope (4) set on the second winch (2), a fixed pulley assembly (5) set on the top of the boom (7), and a double moving pulley assembly (6) set on the other side of the boom (7); The fixed pulley assembly (5) includes a fixed pulley frame (51), a rear first fixed pulley (52) and a rear second fixed pulley (53) disposed on the side of the fixed pulley frame (51) near the first winch (1), a front first fixed pulley (54) and a front second fixed pulley (55) disposed on the fixed pulley frame (51) away from the first winch (1), a first fixing point (56) disposed below the front second fixed pulley (55), and a second fixing point (57) disposed below the front first fixed pulley (54). The double movable pulley assembly (6) includes a movable pulley frame (63), a first movable pulley (61) disposed on the upper part of the movable pulley frame (63), and a second movable pulley (62) located directly below the first movable pulley (61). The first wire rope (3) extends from the first winch (1) and is connected in sequence to the rear first fixed pulley (52), the front first fixed pulley (54), and the first movable pulley (61) before being connected to the first fixed point (56); The second wire rope (4) extends from the second winch (2) and is connected in sequence to the rear second fixed pulley (53), the front second fixed pulley (55), and the second movable pulley (62) before being connected to the second fixed point (57); The diameter of the first movable pulley (61) is smaller than that of the second movable pulley (62), and the difference in their diameters corresponds to the spacing between the first wire rope (3) and the second wire rope (4); wherein, the first wire rope (3) on both sides of the first movable pulley (61) is located between the second wire rope (4) on both sides of the second movable pulley (62).

2. The boom device with dual-moving pulley block cooperative dual-winch control as described in claim 1, characterized in that, The first winch (1) and the second winch (2) are both equipped with power devices and are connected in parallel. Their operating speeds correspond to the synchronous lifting and lowering of the first fixed pulley (54) and the second fixed pulley (55), respectively. The strength of each of the first wire rope (3) and the second wire rope (4) is not less than the strength required for the safety design of construction application.

3. The boom device with dual-moving pulley block cooperative dual-winch control as described in claim 1, characterized in that, The rear first fixed pulley (52) and the front first fixed pulley (54) are arranged horizontally and upward respectively, with their top surfaces flush or inclined and connected to the first steel wire rope (3) corresponding to their top surfaces; The second fixed pulley (53) and the second fixed pulley (55) are set horizontally and upward respectively, with their top surfaces flush or inclined and connected to the second wire rope (4) on the same top surface.

4. The boom device with dual-moving pulley block cooperative dual-winch control as described in claim 1, characterized in that, The first wire rope (3) is vertically or inclinedly arranged on both sides of the first movable pulley (61), and the second wire rope (4) is vertically or inclinedly arranged on both sides of the second movable pulley (62), and the first wire rope (3) and the second wire rope (4) are in the same vertical plane; The inclined settings of the first wire rope (3) and the second wire rope (4) both meet the force requirements of the lifting design of the fixed pulley assembly (5).

5. The boom device with dual-moving pulley block cooperative dual-winch control as described in claim 1, characterized in that, The distance between the perpendicular line from the first fixed point (56) and the point of tangency of the first fixed pulley (54) on the side away from the boom (7) is not less than the outer diameter of the first movable pulley (61); The distance between the perpendicular line from the second fixed point (57) and the perpendicular line from the outer tangent point of the second fixed pulley (55) on the side away from the boom (7) is not less than the outer diameter of the second movable pulley (62).

6. The boom device with dual-moving pulley block cooperative dual-winch control as described in claim 1, characterized in that, The first movable pulley (61) and the second movable pulley (62) are arranged in parallel vertically and are integrally connected by the movable pulley frame (63); the diameter of the first movable pulley (61) is smaller than the diameter of the second movable pulley (62), and the difference in their diameters corresponds to the spacing when the first wire rope (3) and the second wire rope (4) are arranged vertically.

7. The boom device with dual-moving pulley block cooperative dual-winch control as described in claim 1, characterized in that, The movable pulley frame (63) is also connected to a connector (64), which is detachably connected to the power head (8); a slider (9) is connected between the power head (8) and the boom (7); the connector (64) is located directly below the second movable pulley (62) and is connected to the power head (8) via a connecting shaft; Or a hook is also connected below the pulley assembly (6) via a connector (64).

8. The boom device with dual-moving pulley block cooperative dual-winch control as described in claim 1, characterized in that, The boom (7) includes a pile driver boom frame and a hoisting machine boom, and the corresponding connector (64) connects to the drilling rig power head, the drilling rig power head or the hook.

9. A method for applying the boom device with dual-moving pulley block cooperative dual-winch control as described in claim 1, characterized in that, The specific steps are as follows: Step 1: Determine the model of the first wire rope (3) and the second wire rope (4) according to the strength of the wire rope required for the safety design of construction application; the strength of each of the first wire rope (3) and the second wire rope (4) shall not be less than the strength required for the safety design of construction application. Step 2: Connect the first winch (1) and the second winch (2) in parallel, and control their power devices so that the first movable pulley (61) and the second movable pulley (62) move up and down at the same speed; Step 3: Install the fixed pulley assembly (5) on the boom (7), and then install the corresponding power head (8) or hook and double moving pulley assembly (6) according to the type of boom (7); so that the first wire rope (3) extends from the first winch (1) and is connected in sequence to the rear first fixed pulley (52), the front first fixed pulley (54), and the first moving pulley (61) and then connected to the first fixed point (56); so that the second wire rope (4) extends from the second winch (2) and is connected in sequence to the rear second fixed pulley (53), the front second fixed pulley (55), and the second moving pulley (62) and then connected to the second fixed point (57); Step 4: Correct the first wire rope (3) and the second wire rope (4) to be in the same vertical plane. If not, adjust the positions of the first fixed point (56) and the second fixed point (57) to meet the design requirements that the first wire rope (3) and the second wire rope (4) are in the same vertical plane. Step 5: During use, the power head (8) or hook should always be in a vertical position. If one of the first wire rope (3) or the second wire rope (4) breaks, the power head (8) or hook should remain stable. The strength of a single first wire rope (3) or second wire rope (4) should also meet the safety requirements for hoisting. Then replace or repair the damaged first wire rope (3) or second wire rope (4) until the construction is completed.

10. The application method of the boom device with dual-moving pulley block cooperative dual-winch control as described in claim 9, characterized in that, The fixed pulley assembly (5) and the boom (7) are rotatably connected by a pivot. The fixed pulley frame (51) is also connected to the boom (7) by a telescopic diagonal rod (10). The diagonal rod (10) is an automatic telescopic rod. Its telescopic amount is set according to the design position of the fixed pulley assembly (5) and can be finely adjusted in conjunction with the first wire rope (3) and the second wire rope (4) during installation. After the automatic telescopic rod is adjusted, the rotation of the limiting pulley assembly (5) is stopped so that it remains fixed during use.

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