Pipeline lifting device of crane and control method of pipeline lifting device

Abstract

The invention discloses a pipeline lifting device of a crane and a control method of the pipeline lifting device. The upper device and the lower device which are separated from each other are arranged, the lower device is connected and lifted by the steel wire rope through the lifting hook system to control the lower device to ascend and descend, and the upper device comprises a fixing frame, a first limiting device, a rotary driving mechanism, a rotary connecting shaft and a second limiting device. The lower device comprises a rotating column, a limiting rod, a supporting frame, a limiting block and a balance beam, when the limiting rod is connected with the first limiting device in a clamped mode, the rotating column and the fixing frame are mutually fixed, the limiting block is connected with the second limiting device in a clamped mode, and the supporting frame and the balance beam are mutually fixed. The rotary driving mechanism drives the rotary connecting shaft to rotate to drive the balance beam to rotate, so that a steel wire rope can be prevented from being wound when the supporting frame is controlled to rotate, steering control over a pipeline fixed to the supporting frame can be achieved by controlling the supporting frame to rotate, the working intensity is reduced, and the working efficiency is improved. And the operation safety is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline lifting, and in particular to a pipeline lifting device of a crane and a control method thereof. Background Art

[0002] With the development of economy and the improvement of social level, the use of pipelines is also gradually increasing. They are widely used in the fields of oil and gas industry, chemical industry, heating industry, electric power industry, etc. The process of lifting and loading and unloading pipelines involves the lifting and steering of pipelines to adjust the position and direction of pipelines. The rise and fall of pipelines are usually achieved by cranes, and the steering of pipelines is mainly completed manually. Manual hand-held tools are used to pull one end of the pipeline to assist the steering of the pipeline. The operator needs to have rich operating experience and high concentration. The whole operation process has a low degree of automation, high operation intensity, and low work efficiency. At present, it is difficult for pipeline lifting devices to control the steering of pipelines while preventing the winding of wire ropes. There are more and more problems caused by the uncontrollable steering when the heavy objects are rotated by the crane. Especially when lifting heavy objects with large lengths, there are great safety hazards, which not only cause certain property losses to enterprises, but also cause casualties in serious cases. Summary of the invention

[0003] The embodiment of the present application provides a pipe lifting device for a crane and a control method thereof, which can solve the technical problems that the current pipe lifting device is difficult to control the steering of the pipe while preventing the wire rope from being entangled, has high operation intensity, low work efficiency, and poses great safety hazards.

[0004] The embodiment of the present application provides a road hoisting device for a pipe crane, including an upper device, a wire rope, a hook system and a lower device;

[0005] The upper device includes a fixing frame, a limiting device 1, a rotation driving mechanism, a rotation connecting shaft and a limiting device 2, wherein the limiting device 1 is connected to the middle part of the bottom surface of the fixing frame, the rotation driving mechanism is connected to the bottom of the fixing frame, the rotation connecting shaft is rotatably arranged in the middle part of the rotation driving mechanism, the limiting device 1 is arranged corresponding to the limiting device 2, and the middle parts of the limiting device 1 and the limiting device 2 are hollowly connected to form a vertical channel;

[0006] The lower device comprises a rotating column, a limiting rod, a supporting frame, a limiting block and a balancing beam, wherein the limiting rod is arranged on the outer side of the top of the rotating column, the supporting frame is rotatably connected to the bottom of the rotating column, the limiting block is arranged on the outer side of the supporting frame, the balancing beam is connected to the supporting frame, and the spacing between the limiting rod and the limiting block is equal to the spacing between the limiting device 1 and the limiting device 2;

[0007] The steel wire rope passes through the vertical channel and is connected to the hook system, the hook system is connected to the top of the rotating column, and the length of the steel wire rope is controlled by telescoping to control the lifting and lowering of the lower device through the hook system;

[0008] When the limiting rod is engaged with the limiting device, the rotating column and the fixing frame are fixed to each other, the limiting block is engaged with the limiting device, and the rotating driving mechanism drives the rotating connecting shaft to rotate to drive the balancing beam to rotate.

[0009] In some embodiments, the bottom surface of the limiting device one is provided with a plurality of first grooves, the openings of the first grooves are funnel-shaped, the width of the limiting rod is equal to the minimum width of the first grooves, and the bottom surface of the limiting device two is provided with a plurality of second grooves, the openings of the second grooves are funnel-shaped, and the width of the limiting block is equal to the minimum width of the second grooves.

[0010] In some embodiments, a pressure sensor and a position sensor are provided in the first groove to detect the distance between the limit rod and the top of the first groove of the limit device one and the pressure applied by the limit rod to the limit device one; a pressure sensor and a position sensor are provided in the second groove to detect the distance between the limit block and the top of the second groove of the limit device two and the pressure applied by the limit block to the limit device two.

[0011] In some embodiments, the rotary drive mechanism includes a cross support frame, a motor, a flat key 1, a small gear, a large gear, a flat key 2, a sleeve, and a gear cover;

[0012] The cross support frame is connected to the bottom of the fixed frame, the gear cover is fixedly connected to the bottom surface of the cross support frame, the flat key 1, the pinion, the large gear, the flat key 2, and the sleeve are arranged between the cross support frame and the top cover; the motor is fixed to the top surface of the cross support frame and the driving shaft of the motor extends to the bottom surface of the cross support frame, the motor is fixedly connected to the pinion through the flat key 1 to transmit power to the pinion; the pinion is connected to the large gear by meshing to transmit power to the large gear; the outer surface of the rotating connecting shaft is connected to the sleeve, the large gear is clamped in the sleeve and fixedly connected to the rotating connecting shaft through the flat key 2.

[0013] In some embodiments, the upper device also includes a rotating sealing structure and a top cover shell, the top cover shell is fixedly connected to the top surface of the cross support frame, the rotating sealing structure is arranged between the cross support frame and the gear cover shell, and the rotating connecting shaft is connected to the rotating sealing structure.

[0014] In some embodiments, the rotating sealing structure includes bearing one, bearing two, washer one, round nut, washer two, and a cover plate, which are arranged in sequence from bottom to top; the rotating connecting shaft is connected to the bearing one, the bearing one is a deep groove ball bearing, the rotating connecting shaft rotates together with the inner ring of the bearing one, and the outer ring of the bearing one is connected to the cross support frame; the rotating connecting shaft is connected to the bearing two, the bearing two is a thrust bearing, the rotating connecting shaft rotates together with the upper support ring of the bearing two, and the lower support ring of the bearing two is connected to the cross support frame; the rotating connecting shaft is connected to the washer one; the rotating connecting shaft is fixedly connected to the round nut; the rotating connecting shaft is fixedly connected to the cover plate via fasteners.

[0015] In some embodiments, a lifting ring is provided on the top of the rotating column, and the lifting ring is suspended on the hook of the hook system. A circular ring base and bearing three are provided on the bottom of the rotating column. The support frame is sleeved on the rotating column and rotatably connected to the circular ring base through bearing three. The bottom surface of the support frame is fixedly connected to the balance beam through fasteners.

[0016] In some embodiments, the pipeline lifting device also includes a gantry crane main frame and a control system, the fixed frame is fixed on the gantry crane main frame, and the control system is connected to the wire rope and the rotation drive mechanism.

[0017] In some embodiments, the gantry crane main frame includes a trolley device and a trolley device, the trolley device is movably connected to the ground, the trolley device is connected to the trolley device, and the trolley device can move on the trolley device through wheels; the wire rope is connected to the trolley device, and the rise and fall of the wire rope is controlled by the trolley device.

[0018] The present application also provides a control method for the above-mentioned pipeline lifting device, including:

[0019] After the pipeline reaches the designated position and the corresponding angle, the length of the steel wire rope is controlled to extend so that the hook system is lowered, and after the balance beam is lowered to the designated position, the pipeline is fixed on the balance beam;

[0020] In response to the rotation of the pipeline fixed on the balance beam, the length of the wire rope is controlled to shorten so that the hook system rises until the limit rod is engaged with the limit device, at which time the rotating column and the fixing frame are fixed to each other, the limit block is engaged with the limit device, and the rotating drive mechanism drives the rotating connecting shaft to rotate and drive the balance beam to rotate, so as to adjust the angle of the pipeline;

[0021] In response to removing the pipeline fixed on the balance beam, the length of the wire rope is controlled to extend to lower the hook system, and when the pipeline is lowered to a specified height, the pipeline is removed from the balance beam.

[0022] The pipe lifting device of the crane provided in the embodiment of the present application and the control method thereof, by setting an upper device and a lower device separated from each other, the lower device is connected and lifted by a wire rope through a hook system to control the lifting and lowering of the lower device, the upper device includes a fixed frame, a limiting device 1, a rotating drive mechanism, a rotating connecting shaft and a limiting device 2, the lower device includes a rotating column, a limiting rod, a support frame, a limiting block and a balance beam, when the limiting rod is engaged with the limiting device 1, the rotating column and the fixed frame are fixed to each other, the limiting block is engaged with the limiting device 2, and the rotating drive mechanism drives the rotating connecting shaft to rotate and drives the balance beam to rotate, so that the wire rope can be prevented from being entangled when controlling the rotation of the support frame, and the steering control of the pipe fixed on the support frame can be realized by controlling the rotation of the support frame, thereby reducing the working intensity, improving the working efficiency and ensuring the working safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0024] Figure 1 This is a schematic structural diagram from a first perspective of the pipeline lifting device provided in an embodiment of the present application.

[0025] Figure 2 A schematic diagram of the structure of the pipe lifting device provided in an embodiment of the present application from a second perspective.

[0026] Figure 3 A schematic diagram of the structure of the gantry crane main frame provided in an embodiment of the present application.

[0027] Figure 4 A schematic diagram of the structure of the pipeline lifting device provided in an embodiment of the present application without the main frame of the gantry crane.

[0028] Figure 5 This is a schematic diagram of the first-perspective structure of the upper device provided in an embodiment of the present application.

[0029] Figure 6 This is a schematic diagram of the second perspective structure of the upper device provided in an embodiment of the present application.

[0030] Figure 7 A cross-sectional view of an upper device provided in an embodiment of the present application.

[0031] Figure 8 A schematic diagram of the structure of a cross support frame provided in an embodiment of the present application.

[0032] Fig. 9 A schematic diagram of the structure of a rotating connecting shaft provided in an embodiment of the present application.

[0033] Fig.10 A schematic diagram of the structure of the lower device provided in an embodiment of the present application.

[0034] Fig.11 A cross-sectional view of the lower device provided in an embodiment of the present application.

[0035] Fig.12 A schematic structural diagram of the combined state of the limit block and the limit device 2 provided in an embodiment of the present application.

[0036] The markings in the figure are as follows:

[0037] Upper device 1, fixed frame 11, limiting device 12, first groove 121, rotary drive mechanism 13, cross support frame 131, motor 132, flat key 133, small gear 134, large gear 135, flat key 2 136, sleeve 137, gear cover 138, rotary connecting shaft 14, limiting device 2 15, second groove 151, rotating sealing structure 16, bearing 1 161, bearing 2 162, washer 1 163, round nut 164, washer 2 165, cover plate 166, top cover 17, wire rope 2, hook system 3, lower device 4, rotating column 41, lifting ring 411, circular ring base 412, bearing 3 413, limiting rod 42, support frame 43, limiting block 44, balance beam 45, gantry crane main frame 5, trolley device 51, trolley device 52. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0039] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] The embodiment of the present application provides a pipe lifting device for a crane, comprising an upper device 1, a steel wire rope 2, a hook system 3 and a lower device 4;

[0043] The upper device 1 includes a fixing frame 11, a limiting device 12, a rotation drive mechanism 13, a rotation connection shaft 14 and a limiting device 15. The limiting device 12 is connected to the middle of the bottom surface of the fixing frame 11, the rotation drive mechanism 13 is connected to the bottom of the fixing frame 11, the rotation connection shaft 14 is rotatably arranged in the middle of the rotation drive mechanism 13, the limiting device 12 is arranged corresponding to the limiting device 15, and the middle parts of the limiting device 12 and the limiting device 15 are hollow and connected to form a vertical channel;

[0044] The lower device 4 includes a rotating column 41, a limiting rod 42, a supporting frame 43, a limiting block 44 and a balancing beam 45, wherein the limiting rod 42 is arranged on the outer side of the top of the rotating column 41, the supporting frame 43 is rotatably connected to the bottom of the rotating column 41, the limiting block 44 is arranged on the outer side of the supporting frame 43, and the balancing beam 45 is connected to the supporting frame 43, and the spacing between the limiting rod 42 and the limiting block 44 is equal to the spacing between the limiting device 1 12 and the limiting device 2 15;

[0045] The steel wire rope 2 passes through the vertical channel and is connected to the hook system 3, and the hook system 3 is connected to the top of the rotating column 41. The length of the steel wire rope 2 is controlled by telescoping to control the lifting and lowering of the lower device 4 through the hook system 3;

[0046] When the limiting rod 42 is engaged with the limiting device 12, the rotating column 41 and the fixing frame 11 are fixed to each other, the limiting block 44 is engaged with the limiting device 2 15, and the rotating driving mechanism 13 drives the rotating connecting shaft 14 to rotate and drives the balancing beam 45 to rotate.

[0047] It is understandable that a pipeline is provided on the balance beam 45 to realize lifting and removing the pipeline. The vertical channel can limit the position of the wire rope 2. This embodiment can achieve the effect of precise steering and anti-swaying during the pipeline lifting process through the connection of various components and the cooperation of various systems, saving labor, improving work efficiency, improving the safety of production operations, ensuring the life safety of employees and the property safety of the enterprise, saving expenses for the enterprise and increasing benefits.

[0048] In some embodiments, the bottom surface of the limiting device 12 is provided with a plurality of first grooves 121, the opening of the first groove 121 is funnel-shaped, the width of the limiting rod 42 is equal to the minimum width of the first groove 121, and the bottom surface of the limiting device 2 15 is provided with a plurality of second grooves 151, the opening of the second groove 151 is funnel-shaped, and the width of the limiting block 44 is equal to the minimum width of the second groove 151.

[0049] In some embodiments, a pressure sensor and a position sensor are provided in the first groove 121 for detecting the distance between the limit rod 42 and the top of the first groove 121 of the limit device 12 and the pressure applied by the limit rod 42 to the limit device 12; a pressure sensor and a position sensor are provided in the second groove 151 for detecting the distance between the limit block 44 and the top of the second groove 151 of the limit device 2 15 and the pressure applied by the limit block 44 to the limit device 2 15.

[0050] In some embodiments, the rotary drive mechanism 13 includes a cross support frame 131, a motor 132, a flat key 133, a small gear 134, a large gear 135, a flat key 2 136, a sleeve 137, and a gear cover 138;

[0051] The cross support frame 131 is connected to the bottom of the fixed frame 11, the gear cover 138 is fixedly connected to the bottom surface of the cross support frame 131, the flat key 133, the pinion 134, the large gear 135, the flat key 2 136, and the sleeve 137 are arranged between the cross support frame 131 and the gear cover 138; the motor 132 is fixed to the top surface of the cross support frame 131 and the driving shaft of the motor 132 extends to the bottom surface of the cross support frame 131, the motor 132 is fixedly connected to the pinion 134 through the flat key 133 to transmit power to the pinion 134; the pinion 134 is connected to the large gear 135 in a meshing manner to transmit power to the large gear 135; the outer surface of the rotating connecting shaft 14 is connected to the sleeve 137, and the large gear 135 is clamped in the sleeve 137 and fixedly connected to the rotating connecting shaft 14 through the flat key 2 136.

[0052] When in use, the pipe lifting device of the crane with self-rotation and anti-sway function drives the small gear 134 to rotate through the motor 132, the small gear 134 drives the large gear 135 to rotate, the large gear 135 drives the rotating connecting shaft 14 to rotate, the rotating connecting shaft 14 drives the limiting device 15 to rotate together, the limiting device 15 is connected to the limiting block 44, and drives the support frame 43 and the balance beam 45 to rotate together. The pipe is suspended at both ends of the balance beam 45, so as to rotate with the balance beam 45 and the support frame. The rotating connecting shaft 14 is fixed to the inside of the cross support frame 131 through bearings and other components, and can rotate relative to the cross support frame 131. In order to prevent the steel wire rope 2 from rotating and winding during the rotation of the pipe, a fixed frame 11 is arranged on the top, the fixed frame 11 is fixedly connected to the trolley device 52 of the gantry crane, and a limiting device 12 is arranged at the center of the fixed frame 11. The limiting rod 42 of the lower device 4 is connected to the first groove 121 in the limiting device 12, so as to ensure that the steel wire rope 2 does not rotate and entangle during the rotation of the balance beam 45.

[0053] In some embodiments, the upper device 1 also includes a rotating sealing structure 16 and a top cover shell 17, the top cover shell 17 is fixedly connected to the top surface of the cross support frame 131, the rotating sealing structure 16 is arranged between the cross support frame 131 and the top cover shell 17, and the rotating connecting shaft 14 is connected to the rotating sealing structure 16.

[0054] Preferably, the top cover 17 is fixedly connected to the cross support frame 131 by fasteners; the gear cover 138 is fixedly connected to the cross support frame 131 by fasteners to prevent foreign matter such as dust from entering therein and affecting the rotation of the large gear 135 and the small gear 134.

[0055] In some embodiments, the rotating sealing structure 16 includes a bearing 161, a bearing 162, a washer 163, a round nut 164, a washer 165, and a cover plate 166, which are arranged in sequence from bottom to top; the rotating connecting shaft 14 is connected to the bearing 161, the bearing 161 is a deep groove ball bearing, the rotating connecting shaft 14 rotates together with the inner ring of the bearing 161, and the outer ring of the bearing 161 is connected to the cross support frame 131; the rotating connecting shaft 14 is connected to the bearing 162, the bearing 162 is a thrust bearing, the rotating connecting shaft 14 rotates together with the upper support ring of the bearing 162, and the lower support ring of the bearing 162 is connected to the cross support frame 131; the rotating connecting shaft 14 is connected to the washer 163; the rotating connecting shaft 14 is fixedly connected to the round nut 164; the rotating connecting shaft 14 is fixedly connected to the cover plate 166 by fasteners.

[0056] In some embodiments, a hanging ring 411 is provided on the top of the rotating column 41, and the hanging ring 411 is suspended on the hook of the hook system 3. A circular ring base 412 and a bearing three 413 are provided on the bottom of the rotating column 41. The support frame 43 is sleeved on the rotating column 41 and is rotatably connected to the circular ring base 412 through the bearing three 413. The bottom surface of the support frame 43 is fixedly connected to the balance beam 45 through fasteners.

[0057] The lifting ring 411 is fixedly connected to the rotating column 41 by welding, and the lifting ring 411 is suspended on the hook of the hook system 3 to support the entire lower device 4; the limiting rod 42 is fixedly connected to the rotating column 41 by welding, and is used to be inserted into the first groove 121 in the limiting device 12 to ensure that the lifting ring 411, the hook system 3 and the wire rope 2 do not rotate during the rotation of the balance beam 45; the rotating column 41 is connected to the support frame 43 through the bearing 3 413, which can The bearing three 413 is a thrust cylindrical roller bearing capable of withstanding a relatively large axial force. The support frame 43 is fixedly connected to the balance beam 45 by fasteners to drive the rotation of the balance beam 45. The limit block 44 is fixedly connected to the support frame 43 by welding to engage with the second groove 151 in the limit device two 15 to transmit the rotation of the limit device two 15 to the support frame 43, thereby driving the balance beam 45 and the pipeline hung under the balance beam 45 to rotate.

[0058] In some embodiments, the pipe lifting device of the crane also includes a gantry crane main frame 5 and a control system, the fixed frame 11 is fixed on the gantry crane main frame 5, and the control system is connected to the wire rope 2 and the rotation drive mechanism 13.

[0059] In some embodiments, the gantry crane main frame 5 includes a trolley device 51 and a trolley device 52, the trolley device 51 is movably connected to the ground, the trolley device 52 is connected to the trolley device 51, and the trolley device 52 can move on the trolley device 51 through wheels; the wire rope 2 is connected to the trolley device 52, and the rise and fall of the wire rope 2 is controlled by the trolley device 52.

[0060] The control system is used to control the movement of the trolley device 51, the movement of the trolley device 52, the lifting of the steel wire rope 2, the rotation of the motor 132, etc. Under the control of the control system, the automatic rotation of the pipeline can be well realized to prevent the pipeline from swinging during movement. The pipeline lifting device of the crane with self-rotation and anti-swaying functions can well play the role of auxiliary steering and anti-swaying during pipeline lifting and movement, saving labor, improving work efficiency, improving the safety of production operations, ensuring the life safety of employees and the property safety of the enterprise, saving expenses for the enterprise and increasing benefits.

[0061] The embodiment of the present application also provides a control method for the pipe lifting device of the crane as mentioned above, comprising:

[0062] After the pipeline reaches the designated position and the corresponding angle, the length of the steel wire rope 2 is controlled to extend so that the hook system 3 is lowered. After the balance beam 45 is lowered to the designated position, the pipeline is fixed on the balance beam 45.

[0063] In response to the rotation of the pipeline fixed on the balance beam 45, the length of the steel wire rope 2 is controlled to shorten so that the hook system 3 rises until the limit rod 42 is engaged with the limit device 12, at which time the rotating column 41 and the fixing frame 11 are fixed to each other, the limit block 44 is engaged with the limit device 2 15, and the rotating drive mechanism 13 drives the rotating connecting shaft 14 to rotate and drive the balance beam 45 to rotate, so as to adjust the angle of the pipeline;

[0064] In response to the removal of the pipe fixed on the balance beam 45 , the length of the steel wire rope 2 is controlled to extend so that the hook system 3 descends, and when the pipe is lowered to a specified height, the pipe is removed from the balance beam 45 .

[0065] The pipe lifting device of the crane provided in the embodiment of the present application and the control method thereof are provided by setting an upper device 1 and a lower device 4 separated from each other, and the lower device 4 is connected and lifted by a wire rope 2 through a hook system 3 to realize the control of the lifting of the lower device 4, the upper device 1 includes a fixing frame 11, a limiting device 12, a rotating drive mechanism 13, a rotating connecting shaft 14 and a limiting device 2 15, and the lower device 4 includes a rotating column 41, a limiting rod 42, a supporting frame 43, a limiting block 44 and a balancing beam 45, when the limiting rod 42 When engaged with the limiting device 12, the rotating column 41 and the fixed frame 11 are fixed to each other, the limiting block 44 is engaged with the limiting device 2 15, and the rotating drive mechanism 13 drives the rotating connecting shaft 14 to rotate and drives the balancing beam 45 to rotate. In this way, when controlling the rotation of the support frame 43, the wire rope 2 can be prevented from being entangled. By controlling the rotation of the support frame 43, the steering control of the pipeline fixed on the support frame 43 can be achieved, which reduces the working intensity, improves the working efficiency, and ensures the working safety.

[0066] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0067] The above is a detailed introduction to a pipe lifting device of a crane and a control method thereof provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pipe lifting device for a crane, characterized in that: It includes upper device, wire rope, hook system and lower device; The upper device includes a fixing frame, a limiting device 1, a rotation driving mechanism, a rotation connecting shaft and a limiting device 2, wherein the limiting device 1 is connected to the middle part of the bottom surface of the fixing frame, the rotation driving mechanism is connected to the bottom of the fixing frame, the rotation connecting shaft is rotatably arranged in the middle part of the rotation driving mechanism, the limiting device 1 is arranged corresponding to the limiting device 2, and the middle parts of the limiting device 1 and the limiting device 2 are hollowly connected to form a vertical channel; The lower device comprises a rotating column, a limiting rod, a supporting frame, a limiting block and a balancing beam, wherein the limiting rod is arranged on the outer side of the top of the rotating column, the supporting frame is rotatably connected to the bottom of the rotating column, the limiting block is arranged on the outer side of the supporting frame, the balancing beam is connected to the supporting frame, and the spacing between the limiting rod and the limiting block is equal to the spacing between the limiting device 1 and the limiting device 2; The steel wire rope passes through the vertical channel and is connected to the hook system, the hook system is connected to the top of the rotating column, and the length of the steel wire rope is controlled by telescoping to control the lifting and lowering of the lower device through the hook system; When the limiting rod is engaged with the limiting device, the rotating column and the fixing frame are fixed to each other, the limiting block is engaged with the limiting device, and the rotating driving mechanism drives the rotating connecting shaft to rotate to drive the balancing beam to rotate.

2. The pipe lifting device of a crane according to claim 1, characterized in that: The bottom surface of the limiting device 1 is provided with a plurality of first grooves, the openings of the first grooves are funnel-shaped, and the width of the limiting rod is equal to the minimum width of the first grooves. The bottom surface of the limiting device 2 is provided with a plurality of second grooves, the openings of the second grooves are funnel-shaped, and the width of the limiting block is equal to the minimum width of the second grooves.

3. The pipe lifting device of a crane according to claim 2, characterized in that: The first groove is provided with a pressure sensor and a position sensor for detecting the distance between the limit rod and the top of the first groove of the limit device one and the pressure applied by the limit rod to the limit device one; the second groove is provided with a pressure sensor and a position sensor for detecting the distance between the limit block and the top of the second groove of the limit device two and the pressure applied by the limit block to the limit device two.

4. The pipe lifting device for a crane according to claim 1, characterized in that: The rotary drive mechanism comprises a cross support frame, a motor, a flat key 1, a small gear, a large gear, a flat key 2, a sleeve, and a gear cover; The cross support frame is connected to the bottom of the fixed frame, the gear cover is fixedly connected to the bottom surface of the cross support frame, the flat key 1, the pinion, the large gear, the flat key 2, and the sleeve are arranged between the cross support frame and the gear cover; the motor is fixed to the top surface of the cross support frame and the driving shaft of the motor extends to the bottom surface of the cross support frame, the motor is fixedly connected to the pinion through the flat key 1 to transmit power to the pinion; the pinion is connected to the large gear by meshing to transmit power to the large gear; the outer surface of the rotating connecting shaft is connected to the sleeve, the large gear is clamped in the sleeve and fixedly connected to the rotating connecting shaft through the flat key 2.

5. The pipe lifting device for a crane according to claim 4, characterized in that: The upper device also includes a rotating sealing structure and a top cover shell, wherein the top cover shell is fixedly connected to the top surface of the cross support frame, the rotating sealing structure is arranged between the cross support frame and the top cover shell, and the rotating connecting shaft is connected to the rotating sealing structure.

6. The pipe lifting device for a crane according to claim 5, characterized in that: The rotary sealing structure includes bearing 1, bearing 2, washer 1, round nut, washer 2, and cover plate which are arranged in sequence from bottom to top; the rotary connecting shaft is connected to the bearing 1, which is a deep groove ball bearing, and the rotary connecting shaft rotates together with the inner ring of the bearing 1, and the outer ring of the bearing 1 is connected to the cross support frame; the rotary connecting shaft is connected to the bearing 2, which is a thrust bearing, and the rotary connecting shaft rotates together with the upper support ring of the bearing 2, and the lower support ring of the bearing 2 is connected to the cross support frame; the rotary connecting shaft is connected to the washer 1; the rotary connecting shaft is fixedly connected to the round nut; the rotary connecting shaft is fixedly connected to the cover plate via fasteners.

7. The pipe lifting device for a crane according to claim 1, characterized in that: A lifting ring is provided on the top of the rotating column, and the lifting ring is suspended on the hook of the hook system. A circular ring base and bearing three are provided on the bottom of the rotating column. The support frame is sleeved on the rotating column and rotatably connected to the circular ring base through bearing three. The bottom surface of the support frame is fixedly connected to the balance beam through fasteners.

8. The pipe lifting device for a crane according to claim 1, characterized in that: The pipeline lifting device also includes a gantry crane main frame and a control system. The fixing frame is fixed on the gantry crane main frame, and the control system is connected to the wire rope and the rotary drive mechanism.

9. The pipe lifting device for a crane according to claim 8, characterized in that: The main frame of the gantry crane includes a trolley device and a trolley device. The trolley device is movably connected to the ground, and the trolley device is connected to the trolley device. The trolley device can move on the trolley device through wheels; the wire rope is connected to the trolley device, and the rise and fall of the wire rope is controlled by the trolley device.

10. A method for controlling a pipe lifting device of a crane according to any one of claims 1 to 9, characterized in that: include: After the pipeline reaches the designated position and the corresponding angle, the length of the steel wire rope is controlled to extend so that the hook system is lowered, and after the balance beam is lowered to the designated position, the pipeline is fixed on the balance beam; In response to the rotation of the pipeline fixed on the balance beam, the length of the wire rope is controlled to shorten so that the hook system rises until the limit rod is engaged with the limit device, at which time the rotating column and the fixing frame are fixed to each other, the limit block is engaged with the limit device, and the rotating drive mechanism drives the rotating connecting shaft to rotate and drive the balance beam to rotate, so as to adjust the angle of the pipeline; In response to removing the pipeline fixed on the balance beam, the length of the wire rope is controlled to extend to lower the hook system, and when the pipeline is lowered to a specified height, the pipeline is removed from the balance beam.

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