CN111470407B - Weighing rod type hoisting assembly, hoisting equipment and hoisting method - Google Patents

Abstract

The invention aims to provide a weighing-rod type hoisting assembly, which comprises: the load bearing unit is provided with an extension direction and comprises a load bearing part, more than one hanging point and a counterweight part, wherein the load bearing part is used for loading a hung object, the hanging point is used for connecting a hanger, and the counterweight part is positioned on the opposite side of the load bearing part relative to at least one hanging point in the extension direction; and a counterweight unit movably disposed on the counterweight portion along the extending direction. The invention also provides hoisting equipment and a hoisting method adopting the weighing rod type hoisting balance assembly. Through adopting above-mentioned balance bar formula hoist and mount balanced subassembly, can avoid the barrier, accurate taking one's place.

Description

Weighing rod type hoisting assembly, hoisting equipment and hoisting method

Technical Field

The invention relates to a weighing-rod type hoisting assembly, also relates to hoisting equipment comprising the weighing-rod type hoisting assembly and a hoisting method adopting the weighing-rod type hoisting assembly, and belongs to the field of hoisting and installation.

Background

The hoisting engineering is applied to various fields of industry, civilian use, nuclear power, ships, aviation, highways, railways and the like, and has wide application range and large demand. Under general conditions, the hoisting space is large and is not limited, hoisting in place is completed through cranes such as cranes, and the hoisting in place is usually smooth. However, in the process of hoisting, the situation that the conventional hoisting method cannot be completed smoothly due to the limited vertical space of hoisting often occurs. For example, since there are obstacles such as plant structural beams, floor slabs and the like above the location of the hoisted object to hinder hoisting and the hoisted object is in a short distance, the hoisted object cannot be directly hoisted in place by using a crane and the like, and in this case, the hoisting manner is generally divided into two types.

One is to adopt special lifting device to hoist, and the special lifting device that this kind of mode adopted at present function singleness usually does not have the commonality, and the distance that can stretch into in the space of being restricted moreover is less.

And secondly, the hoisting is carried out without adopting a special hoisting tool, the general process is that the hoisted object is hoisted to the position nearby the in-place position, and then the auxiliary hoisting is carried out by a crane or a chain block and the like until the hoisted object is hoisted in place. The mode is usually required to be repeatedly adjusted after being hoisted in place, the in-place precision is low, the working hours are consumed, the difficulty of quality control is high, the cost and the construction period are not favorably controlled, meanwhile, when an upper obstacle is large, the horizontal distance of a hoisted object from the in-place position is far, when auxiliary hoisting is carried out through a crane or a chain block and the like, the inclined pulling and inclined hoisting in the hoisting process is difficult to avoid, the safety of personnel and the whole equipment cannot be guaranteed, and great safety risk exists.

Disclosure of Invention

The invention aims to provide a hoisting assembly which can be directly hoisted in place by a crane to avoid obstacles easily and avoid inclined pulling and inclined hoisting.

There is provided a weigh beam hoist assembly comprising: the bearing unit is provided with an extending direction and comprises: a load-carrying section for loading a suspended object; more than one hanging point is used for connecting a hanger; and a weight portion located on an opposite side of the load portion with respect to at least one of the hanging points in the extending direction; and a weight unit movably provided to the weight portion along the extending direction; the bearing unit comprises two main beams and a cross beam, the two main beams extend along the extending direction, the cross beam extends perpendicular to the extending direction, two ends of the cross beam are respectively connected with the two main beams, the cross beam is divided into two parts in the extending direction, one part forms the load-bearing part, and the other part forms the counterweight part.

In one embodiment, the counterweight unit includes a moving mechanism and a plurality of counter weights, each of which is provided to be independently detachably attached to the moving mechanism, and the moving mechanism is movably provided to the counterweight portion along the extending direction.

In one embodiment, the moving mechanism comprises a receiving opening and a plurality of clamping grooves positioned on two sides of the receiving opening, each balancing weight is a T-shaped plate with lateral shoulders formed on two sides and a narrow convex part formed below the balancing weight, the lateral shoulders of the T-shaped plate can be clamped into the clamping grooves, and the narrow convex part of the T-shaped plate can be inserted into the receiving opening; the moving mechanism is provided with more than two accommodating openings in the direction perpendicular to the extending direction.

In one embodiment, the boom hoist group further comprises a drive unit driving the counterweight unit to move along the extension direction; the driving unit is a rotary driving unit for outputting rotary motion, the driving unit drives the counterweight unit through a screw nut matched with the driving unit, the driving unit drives a screw to rotate, and the nut is connected with the counterweight unit; the weighing-rod type hoisting assembly further comprises a wireless remote controller, and the driving unit is controlled through the wireless remote controller.

In one embodiment, the load-carrying portion includes a support surface for supporting the hoisted object; the load-bearing part also comprises a limit stop which is arranged on the supporting surface and used for limiting the hung object to slide along the extending direction; the limit stop is adjustably mounted to the support surface by movable engagement of a fastener with the mounting hole.

In one embodiment, the load-carrying portion includes a hanging contact point for hanging the suspended object.

In one embodiment, the counterweight portion is provided with a guide rail extending along the extending direction, the counterweight unit moves along the guide rail through a roller, the driving unit includes a motor and a speed reducer connected to an output shaft of the motor, the motor and the speed reducer are disposed in the middle of the cross beam, the nut is fixed in the middle of the counterweight unit, and the lead screw is engaged with the nut and driven by the output shaft of the speed reducer.

The invention also comprises hoisting equipment which comprises a crane and the balance-bar type hoisting assembly, wherein the crane is connected with the hoisting point of the balance-bar type hoisting assembly through a hoisting tool.

The invention also comprises a hoisting method, and the adoption of the weighing-rod hoisting assembly comprises the following steps: connecting a crane: connecting a lifting appliance of a crane with a lifting point of the balance-bar type lifting assembly; loading a hoisted object: loading the hoisted object through the loading part; hoisting adjustment: slowly hoisting the scale-type hoisting assembly loaded with the hoisted object, and adjusting the position of the counterweight unit in the extension direction until the scale-type hoisting assembly is kept horizontal; hoisting in place: hoisting the balance-bar hoisting assembly loaded with the hoisted object to the vicinity of a seating position by the crane, and bringing the hoisted object into the seating position from below the obstacle while avoiding the obstacle by operating the crane: and in-place dismantling: and controlling the counterweight unit to move towards the load-carrying part, and removing the object to be hung from the load-carrying part.

In one embodiment, the counterweight unit comprises a plurality of counterweights, and before the connecting crane, the hoisting method further comprises: calculating configuration: according to the hoisted object, carrying out stress settlement according to a lever principle to configure the number of counterweight blocks required for hoisting and the moving position of the counterweight unit in the extending direction, and enabling the counterweight unit to comprise the required number of counterweight blocks; between the hoisting adjustment and the hoisting in place, the hoisting method further comprises: examination by trial hoisting: and standing the weighing-rod type hoisting assembly for a preset time to check whether the abnormity exists.

Through adopting above-mentioned title rod-type hoisting assembly and including hoisting equipment and the hoisting method of this title rod-type hoisting assembly, can satisfy the hoist and mount needs in the limited space in scene, avoid askew drawing to hang to one side, ensure hoist and mount safety to thereby improve the construction progress in scene, thereby improve work efficiency and realize reduce cost's purpose, have characteristics such as adaptability is wide, the practicality is strong, easy operation, safety and stability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention.

In the drawings:

fig. 1 is a top view of a boom hoist assembly.

Fig. 2 is a front view of the boom hoist assembly.

Fig. 3 is a top view of the carrying unit.

Fig. 4 is a plan view of the moving mechanism.

Fig. 5 is a front view of the weight.

Fig. 6 is a schematic view showing the weight unit at the initial position and the final position.

Detailed Description

The present invention will be further described with reference to the following detailed description and the accompanying drawings, wherein the following description sets forth further details for the purpose of providing a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms other than those described herein, and it will be readily apparent to those skilled in the art that the present invention may be embodied in many different forms without departing from the spirit or scope of the invention.

For example, a first feature described later in the specification may be formed over or on a second feature, and may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated in the disclosure in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

As used herein, the terms "a," "an," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

For convenience in description, spatial relational terms such as "below," "beneath," "below," "under," "over," "upper," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these terms of spatial relationship are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary words "below" and "beneath" can encompass both an orientation of up and down. The device may have other orientations (rotated 90 degrees or at other orientations) and the spatial relationship descriptors used herein should be interpreted accordingly. Further, it will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.

It is noted that these and other figures which follow are merely exemplary and not drawn to scale and should not be considered as limiting the scope of the invention as it is actually claimed. Further, the conversion methods in the different embodiments may be appropriately combined.

Figures 1 and 2 show an example configuration of a scale bar hoist assembly 10 from different angles. The pan-type hoist assembly 10 includes a load carrying unit 1 and a counterweight unit 2.

The load carrying unit 1 comprises more than one suspension point 13 for connection of a spreader 4 (comprising rigging). A crane, such as a crane, suspends the steelyard hoist assembly 10 by connecting the hoist 4 to the suspension point 13. For example, the spreader 4 may include a shackle (not shown) and a wire rope 41 to connect the hook 42 of the crane, the lifting eye 133 may be provided by welding or fastening at the lifting point 13, the lifting eye 133 of the load carrying unit 1 is hung by the shackle and the wire rope 41 and suspended from the hook 42 of the crane, and the boom hoist assembly 10 is hung from the crane.

Fig. 3 shows an example configuration of the carrying unit 1. The carrier unit 1 has an extension direction D. As described above, the carrier unit 1 includes one or more suspension points 13, and the carrier unit 1 further includes the load-carrying portion 11 and the weight portion 12. The load-carrying part 11 is used for loading the lifted object, that is, the lifted object to be lifted in place is arranged on the load-carrying part 11 during the lifting process. The hoisted object can be equipment, a module or a material. The weight portion 12 is located on the opposite side of the load portion 11 with respect to at least one of the one or more hanging points 13 in the extending direction D, and in the drawing, the load portion 11 is located on the left side in the extending direction D, and the weight portion 12 is located on the right side in the extending direction D. The weighing-beam type hanging module 10 may include a plurality of hanging points 13 (a plurality means three or more), wherein the at least one hanging point of the plurality of hanging points 13 is located between the load part 11 and the weight part 12 to constitute a fixed hanging point, that is, a hanging point which is to be used at certain time of hanging, and the other hanging points of the plurality of hanging points 13 are located on the weight part 12 to constitute selectable hanging points, that is, hanging points which may be used at the time of hanging, and the fixed hanging point constituted by the at least one hanging point and the at least one selectable hanging point constituted by the other hanging points constitute an actual hanging point selected at the time of hanging. In the illustrated embodiment, the boom hoist assembly 10 comprises six hoist points 13a, 13b, 13c, 13D, 13e, 13f, two of which 13a, 13b being at least one hoist point as described above, and the counterweight 12 being located opposite the load carrying portion 11 with respect to the hoist points 13a, 13b in the extension direction D, i.e. the hoist points 13a, 13b being located between the load carrying portion 11 and the counterweight 12. Two of the hanging points 13a, 13b as the at least one hanging point constitute fixed hanging points, and the other hanging points 13c, 13d, 13e, 13f are located on the counterweight portion 12 and constitute selectable hanging points, and for example, as shown in fig. 1 and 2, the hanging points 13c, 13d and the fixed hanging points 13a, 13b are selected as actual hanging points at the time of hanging, and the hanging points 13e, 13f and the fixed hanging points 13a, 13b are selected as actual hanging points at the time of actual selection according to the situation of on-site hanging. In another embodiment, the load carrying unit 1 may comprise only one suspension point 13, suspended supported by the one suspension point.

Referring to fig. 3, the load bearing unit 1 includes two main beams 8a and 8b (two upper and lower main beams in fig. 3, collectively referred to as main beams 8) and a cross beam 9, the two main beams 8 extend along an extending direction D, the cross beam 9 extends perpendicular to the extending direction D, two ends (upper and lower ends in fig. 3) of the cross beam 9 are respectively connected to the two main beams 8, the load bearing unit 1 is divided into two parts in the extending direction D by the cross beam 9, one part (left part in fig. 3) constitutes the load bearing part 11, and the other part (right part in fig. 3) constitutes a counterweight part 12. In the illustrated embodiment, the main beams 8 and the cross beams 9 are assembled by the flange connection structure 98 and are detachable from each other, the length of the cross beam 8 can be selected according to actual needs, and the change of the span of the spreader (i.e., the dimension in the direction perpendicular to the extending direction D) is realized by replacing the cross beam 9. In another embodiment, the main beams 8 and the cross beams 9 can also be connected together by other means, such as welding, and are not detachable from each other.

In the embodiment shown, the load carrying unit 1 further comprises a cross beam 99, which is similar in structure to the cross beam 9 and also extends perpendicularly to the extension direction D, and two main beams 8 are connected to each end. The cross member 99 is provided at the end of the weight portion 12 of the load bearing unit 1 opposite to the cross member 9, and can prevent the weight unit 2, which will be described later, from moving beyond the limit in the extending direction D.

With continued reference to fig. 1 and 2, the counterweight unit 2 is movably disposed in the counterweight portion 12 of the load-bearing unit 1 along the extending direction D. The balance of the boom hoist assembly 10 can thus be achieved by moving the counterweight unit 2 back and forth along the extension direction D, so that in the case where there is a beam, floor or other type of obstacle above the in-place position where the hoisted object needs to be hoisted in place and the distance is short, the crane only needs to hoist the boom hoist assembly 10 to the vicinity of the in-place position, then horizontally move the boom hoist assembly 10 toward below the obstacle so that the hoisted object loaded on the carrying section 11 is located below the obstacle, align the hoisted object to the in-place position, and then move the boom hoist assembly 10 downward until the hoisted object reaches the in-place position and stops. In one embodiment, the weight portion 12 may be provided with a guide rail extending in the extending direction D, along which the weight unit 2 is moved by rollers so as to extend in the extending direction D. For example, the main beam 8 is a welded type H-section steel, the inner side of the lower flange of which serves as a guide rail (or running rail) of the counterweight unit 2, and the moving mechanism 21 of the counterweight unit 2, which will be described later, has rollers guided by the guide rail.

In the illustrated embodiment, the load-carrying portion 11 includes a support surface 111 for supporting a suspended object. The support surface 111 is the upper surface of the main beam 8 when the boom hoist assembly 10 hoists the hoisted object. As shown in the illustrated embodiment, the load-carrying portion 11 further includes a limit stopper 112, and the limit stopper 112 is disposed on the support surface 111 and is used for limiting the hung object from sliding along the extending direction D. In this way, when the object to be hung has a space allowing insertion of the load-carrying section 11, for example, in the case of a device having a steel section at the top, the device to be hung can be directly supported on the main beam 8, the pan-type lifting unit 10 is lifted to the side of the device by an operation such as crane hook traveling, and the position of the pan-type lifting unit 10 is adjusted so as to pass through the lower side of the steel section at the top of the device. Further, in the case of having the limit stopper 112, the equipment as the object to be hung can be prevented from slipping during the hoisting by the limit stopper 112. This type of loading of the suspended object is suitable for a case where the suspended object has a space allowing insertion of the load-carrying section 11, and the space between the seating position and the upper obstacle can be very narrow.

In the embodiment shown in fig. 3, the supporting surface 111 is provided with a mounting hole 111a, and the limit stopper 112 may be adjustably mounted to the supporting surface 111 by movably fitting a fastener to the mounting hole 111 a. That is, the position of the limit stopper 112 is adjustable by the movable fit of the fastening member and the mounting hole 111a, so that the position of the limit stopper 112 can be timely adjusted according to the condition of the suspended object when the suspended object is loaded, and the limit effect on the suspended object can be better realized. For example, the mounting hole 111a may be provided with a diameter larger than that of the fastener, or alternatively, the mounting hole 111a may be provided in the form of a waist hole, thereby achieving movable engagement of the mounting hole 111a with the fastener.

In the illustrated embodiment, three limit stoppers 112 are provided on each main beam 8, and the limit stoppers 112 can be detached according to actual conditions. In another embodiment, one, two, or more than four limit stops 112 may be provided on each main beam 8, or only one of the two main beams 8 may be provided with a limit stop 112, which may be optionally arranged according to actual situations.

Referring to fig. 2, the load-carrying portion 11 may include a hanging contact 113 for hanging the object to be hung. In the illustrated embodiment, the suspension joint 113 is disposed on the lower surface of the girder 8, for example, a lifting lug is disposed at the suspension joint 113, and in the figure, two lifting lugs are disposed corresponding to one girder 8, that is, a total of four lifting lugs are disposed on two girders 8, and the lifting lugs may be detachably disposed, for example, by means of a fastener connection, for example, a lifting lug with a suitable rated load may be selected according to actual needs, for example, the rated load may be 6t. In this way, in the case where the suspended object is not suitable for being supported by the support surface 111, the suspended object can be hung from the hanging contact 113 of the boom hoist assembly 10 by a wire rope or a hoisting belt, specifically: the boom hoist assembly 10 is hoisted above the hoisted object by the crane lifting and traveling, and the hoisted object is connected to, for example, a lifting lug provided at the hoist contact point 113 of the boom hoist assembly 10 by a wire rope or a shackle. This type of loading the object to be hung is suitable for a case where the object to be hung does not have a space allowing the load-carrying section 11 to be inserted.

The supporting legs which are enough to support the whole weighing-rod type hoisting assembly 10 can be arranged in the bearing unit 1, so that the whole weighing-rod type hoisting assembly 10 can be placed conveniently, particularly, the quick disassembly and assembly of the balancing weight 22 which is corresponding to different hoisted objects and will be described later can be facilitated, and the disassembly and assembly efficiency of the balancing weight 22 can be improved. For example, 3 detachable type legs are provided under each main beam 8 in fig. 1, respectively.

Referring to fig. 1 and 2, the counterweight unit 2 includes a moving mechanism 21 and a plurality of weights 22, each of the plurality of weights 22 is independently provided to be detachably attached to the moving mechanism 21, and the moving mechanism 21 is movably provided to the counterweight portion 12 along the extending direction D. The plurality of counter weights 22 which can be independently assembled and disassembled on the moving mechanism 21 are arranged, the number of the counter weights required for balancing the hung object can be selected according to the information such as the weight, the structure and the like of the hung object, and the counter weights are flexible to select and convenient to install.

Fig. 4 and 5 show example configurations of the moving mechanism 21 and the weight 22, respectively. The moving mechanism 21 includes a receiving opening 211 and a plurality of engaging grooves 212 on both sides of the receiving opening 211, each weight 22 is a T-shaped plate having lateral shoulders 221 formed on both sides and a narrow protrusion 222 formed below, the lateral shoulders 221 of the T-shaped plate as the weight 22 can be engaged with the engaging grooves 212, and the narrow protrusion 222 of the T-shaped plate as the weight 22 can be inserted into the receiving opening 211. This configuration of the moving mechanism 21 and the weight 22 allows the weight 22 to be placed easily and stably, and the engaging groove 212 prevents the weight 22 from sliding.

In the illustrated embodiment, two types of weight blocks 22 having T-shaped plates but different sizes are provided, so that the shapes can be selected appropriately according to actual needs, and two lifting bolts 228 are further provided on the top surface of the T-shaped plate serving as the weight block 22, so as to facilitate the dismounting of the weight block 22, and moreover, the lifting bolts 228 are provided on the top surface, so that the dismounting of the adjacent weight blocks can not be affected. The T-shaped plate as the weight 22 can be machined from a steel plate of 100mm thickness, for example.

In the illustrated embodiment, the receiving opening 211 is a rectangular window, and the plurality of slots 212 are disposed on two sides of the receiving opening 211 in the extending direction D, in another embodiment, the plurality of slots 212 may also be disposed on two sides of the receiving opening 211 in a direction perpendicular to the extending direction D (i.e., in the left-right direction in fig. 4), or the receiving opening 211 may be a window with another shape.

The moving mechanism 21 may be provided with two or more accommodating ports 211 including two, three, four, and so on, in a direction perpendicular to the extending direction D (i.e., the up-down direction in fig. 1, or the left-right direction in fig. 4). Referring to fig. 1 and 4, the moving mechanism 21 is provided with two receiving openings 211 in a direction perpendicular to the extending direction D, so that, in the case that the whole of the balance-weight hoisting assembly 10 is unbalanced in the direction perpendicular to the extending direction D after the suspended object is loaded, the balance of the whole of the balance-weight hoisting assembly 10 in the direction can be adjusted by different numbers of the counterweights 22 placed in the two receiving openings 211 or different forms of the counterweights 22 placed (for example, two counterweights 22 with different sizes in fig. 5).

In fig. 4, the moving mechanism 21 may be formed by welding a plate material and a channel steel. The moving mechanism 21 includes two transverse beams 231, 232 and two end beams 241, 242, the two transverse beams 231, 232 and the two end beams 241, 242 form a main frame of the moving mechanism 21, the moving mechanism 21 further includes two middle beams 251, 252, and two receiving openings 211 are respectively formed between the end beam 241 and the middle beam 251 and between the end beam 242 and the middle beam 252. The above-mentioned rollers are provided on both sides of the moving mechanism 21 in the direction perpendicular to the extending direction D. The end beams 241, 242 and the intermediate beams 251, 252 may be connected to the transverse beams 231, 232, for example, by a bolt-on construction. The plurality of pockets 212 may be formed by wave-type rack-type pockets.

Referring to fig. 1, the pan-tilt assembly 10 further comprises a drive unit 3, the drive unit 3 driving the counterweight unit 2 to move along the extension direction D. The driving unit 3 may be a linear driving unit that directly drives the counterweight unit 2 to move along a straight line, for example, a hydraulic system or a cylinder or a linear motor. The drive unit 3 may also be a rotary drive unit, e.g. a rotary motor, which outputs a rotary motion, as shown in fig. 1, the drive unit 3 driving the counterweight unit 2 to move along the extension direction D via a transmission mechanism. In the embodiment shown in fig. 1, the transmission mechanism is a screw nut that is engaged with each other, that is, the driving unit 3 drives the counterweight unit 2 through the screw nut that is engaged with each other, the driving unit drives the screw 31 therein to rotate, the nut 32 therein is connected with the counterweight unit 2, for example, the nut 32 is connected with the counterweight unit 2 through the plate-type lifting lug 218 of the moving mechanism 21 in fig. 4, and the driving unit 3 is mounted on the cross beam 9. The transmission mode has simple structure and low cost. The driving unit 3 may include a motor and a reducer connected to an output shaft of the motor, and in the embodiment shown in the figure, the motor and the reducer are disposed in the middle of the cross beam 9, a nut 32 is fixed in the middle of the counterweight unit 2, and a lead screw 31 is engaged with the nut 32 and driven by the output shaft of the reducer. For example, the driving unit 3 may adopt a three-in-one speed reduction motor, so as to have the advantages of large transmission torque, compact structure, stable operation, long service life, etc. Fig. 1 also shows an electrical cabinet 5, the electrical cabinet 5 being provided to a weighing-beam-type hoist assembly 10, in particular, to a counterweight 12, supported by a main beam 8, and electrically connected to the electrical cabinet 5 as a reduction motor of the drive unit 3. After the electrical cabinet 5 is powered on, the speed reduction motor serving as the driving unit 3 is powered on, and the speed reduction motor can control the action of the lead screw 31 according to the control signal of the electrical cabinet 5 to drive the counterweight unit 2 to move back and forth along the extending direction D, so that the balance of the whole weighing-rod type hoisting assembly 10 in the extending direction D during hoisting is realized. The stroke of the screw 31 and the counterweight unit 2 may be determined according to the required maximum stroke, for example, a certain margin may be left according to the required maximum stroke, so as to meet the requirement of configuration and allocation.

The boom hoist assembly 10 may comprise a wireless remote control (not shown) by means of which the drive unit 3 is controlled. For example, the wireless remote controller may send a control signal to the electrical cabinet 5, and then the electrical cabinet 5 sends a control signal to the driving unit 3. Therefore, the stroke of the counterweight unit 2 can be remotely controlled from a long distance, and if an unbalanced state occurs after the counterweight unit is lifted, the position of the counterweight unit 2 can be properly adjusted in the air through the wireless remote controller, and the position of the counterweight unit 2 or the length of a lifting appliance does not need to be adjusted after the whole lifted assembly is dropped to the ground.

The invention also relates to hoisting equipment comprising a crane and the above-mentioned balance-bar hoisting assembly 10. The crane may be, for example, a crane, which is connected to the hoisting point 13 of the balance bar hoist assembly 10 by means of the spreader 4.

The invention also relates to a hoisting method, which adopts the symmetrical rod type hoisting assembly 10 and can comprise the following steps:

(1) Connecting a crane: the spreader 4 of the crane is connected to the suspension point 13 of the steelyard hoist assembly 10.

The lifting lug 133 provided at the hanging point 13 of the boom hoist assembly 10 is connected to the lifting hook 42 of a crane such as a crane via a wire rope 41, a shackle or the like.

(2) Loading a hoisted object: the load-carrying section 11 loads the suspended object.

The crane is directed to hoist the boom-type hoist assembly 10 above the hoisted object, and the hoisted object is loaded through the load-carrying section 11. Loading the hoisted object may include: supporting the hoisted object by the support surface 111 by inserting the load-carrying section 11 into the insertion space of the hoisted object; and, the object to be hung is hung by the hanging contact 113 provided on the load section 11.

(3) Hoisting adjustment: and slowly hoisting the steelyard type hoisting assembly 10 loaded with the hoisted object, and adjusting the position of the counterweight unit 2 in the extension direction D until the steelyard type hoisting assembly 10 is kept horizontal.

The power of the electrical cabinet 5 is switched on, for example, a control signal is sent to the electrical cabinet 5 through a wireless remote controller, so that a motor serving as the driving unit 3 drives the screw rod 31 to rotate, and under the matching action of the screw rod 31 and the nut 32, the counterweight unit 2 is driven to move to a required counterweight position, so that the whole weighing-rod type hoisting assembly 10 reaches balance, and if the weighing-rod type hoisting assembly 10 is inclined, the position of the counterweight unit 2 can be finely adjusted according to actual conditions, so that the weighing-rod type hoisting assembly 10 keeps horizontal. Fig. 6 shows a start position A1 of the weight unit 2 (a position corresponding to the dimension L1), and a weight position A2 that the weight unit 2 should reach when weighted (a position corresponding to the dimension L2). The starting point of the dimension L1 and the starting point of the dimension L2 are both the positions corresponding to the hooks 42, and the ending point is the center position of the weight 22, L1 may be 150mm, for example, and L2 may be 2290mm, for example.

(4) Hoisting in place: the steelyard hoist assembly 10 loaded with the hoisted object is hoisted to the vicinity of the seating position by the crane, and the hoisted object is brought into the seating position from below the obstacle while avoiding the obstacle by operating the crane.

The hoisted object is hoisted to the position near the position, the height is adjusted to avoid the barrier, and the crane hoists the whole weighing-beam hoisting assembly 10 to horizontally move to the position above the position (below the barrier) for positioning.

(5) In-place dismantling: the counterweight unit 2 is controlled to move toward the load-carrying section 11, and the suspended object is removed from the load-carrying section 11.

After the hoisted object is in place, the lead screw 31 can be controlled by the wireless remote controller to drive the counterweight unit 2 to move towards the lower part of the lifting hook 42 of the crane, for example, to the initial starting position A1, the hoisted object is removed from the weighing-rod type hoisting assembly 10, and finally, the crane is instructed to hoist the weighing-rod type hoisting assembly 10.

In addition, before the step (1), the hoisting method may further include:

calculating configuration: according to the hoisted object, the number of the counter weights required for hoisting and the moving position of the counterweight unit 2 in the extending direction D are configured by performing stress settlement according to the lever principle, and the counterweight unit 2 includes the required number of the counter weights 12.

The counterweight position A2 of the counterweight unit 2 can be marked, the hook is slowly raised until each part is connected, then the hook is stopped, and the counterweight unit 2 (counterweight 21) is operated by a wireless remote controller to move to the marked counterweight position A2.

Between step 3) and step (4), the hoisting method may further include:

examination by trial hoisting: the balance bar type hoist assembly 10 is left standing for a predetermined time to check for abnormality.

For example, the operation may be stopped by leaving the system for 5 to 10 minutes, checking whether or not there is any abnormality in the spreader 4, crane, and suspended object, and the like. And (4) after the test hoisting is qualified, performing the step.

By adopting the weighing-rod type hoisting assembly 10 and the hoisting method, the hoisting engineering which is limited in vertical space and cannot be smoothly completed by a conventional hoisting method can be solved; hoisting conditions are provided for similar hoisting working conditions, the universality is very strong, and the method can be popularized and applied; the use and operation are simple, the in-place precision is high, and the construction quality can be improved; the hoisting process is greatly simplified, the construction period can be shortened, the working hours (including the labor input and the use of mechanical machine shifts) can be saved, the construction efficiency can be improved, and the cost can be saved; the inclined pulling and hoisting in the hoisting process with limited vertical space is avoided, and the safety of hoisting work is ensured. In general, the use of the above-described symmetrical boom hoist assembly 10 and method of hoisting may facilitate quality, cost, schedule, and safety control.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the modifications or substitutions within the technical scope of the present invention are included in the scope of the present invention, and therefore, the scope of the present invention should be subject to the protection scope of the claims.

Claims (9)

1. A weigh beam hoist assembly, comprising:

the bearing unit is provided with an extending direction and comprises:

a load-carrying section for loading a hoisted object and for bringing the hoisted object into a restricted space having an obstacle above a seating position;

more than one hanging point is used for connecting the lifting appliance; and

a weight portion located on an opposite side of the load portion with respect to at least one of the hanging points in the extending direction; and

a weight unit movably provided to the weight portion along the extending direction, the weight unit for balancing the suspended object by a principle of leverage and for detaching the suspended object from the load-carrying portion;

the load-bearing unit comprises two main beams and a cross beam, the two main beams extend along the extending direction, the cross beam extends perpendicular to the extending direction, two ends of the cross beam are respectively connected with the two main beams, the cross beam is divided into two parts in the extending direction, one part forms the load-bearing part, and the other part forms the counterweight part.

2. The boom hoist assembly of claim 1 wherein the counterweight unit includes a moving mechanism and a plurality of counterweights, each of the plurality of counterweights being configured to be independently removable from the moving mechanism, the moving mechanism being movably disposed in the counterweight portion along the direction of extension.

3. The boom hoist assembly of claim 2, wherein the moving mechanism includes a receiving port and a plurality of engaging grooves on both sides of the receiving port, each of the weights is a T-shaped plate having lateral shoulders formed on both sides thereof and a narrow protrusion formed below thereof, the lateral shoulders of the T-shaped plate being engageable with the engaging grooves, and the narrow protrusion of the T-shaped plate being insertable into the receiving port;

the moving mechanism is provided with more than two accommodating openings in the direction perpendicular to the extending direction.

4. The boom hoist assembly of claim 1 further comprising a drive unit that drives the counterweight unit to move along the direction of extension;

the driving unit is a rotary driving unit for outputting rotary motion, the driving unit drives the counterweight unit through a screw rod nut which is matched with the driving unit, the driving unit drives a screw rod to rotate, and the nut is connected with the counterweight unit;

the weighing-rod type hoisting assembly further comprises a wireless remote controller, and the driving unit is controlled through the wireless remote controller.

5. The boom hoist assembly of claim 1 wherein the load carrying section includes a support surface for supporting the hoisted object;

the load-bearing part also comprises a limit stop which is arranged on the supporting surface and used for limiting the hung object to slide along the extending direction;

the limit stop is adjustably mounted to the support surface by movable engagement of a fastener with the mounting hole.

6. The boom hoist assembly of claim 4, wherein the counterweight portion is provided with a guide rail extending in the extending direction, the counterweight unit is moved along the guide rail by rollers, the driving unit includes a motor and a reducer connected to an output shaft of the motor, the motor and the reducer are provided at a middle portion of the cross beam, the nut is fixed at the middle portion of the counterweight unit, and the lead screw is engaged with the nut and is driven by the output shaft of the reducer.

7. Hoisting device, characterized in that it comprises a crane and a steelyard-type hoisting assembly according to any one of claims 1 to 6, the crane being connected to the hoisting point of the steelyard-type hoisting assembly by means of a spreader.

8. A hoisting method, characterized in that a steelyard-type hoisting assembly according to any one of claims 1 to 6 is used, comprising the steps of:

connecting a crane: connecting a lifting appliance of a crane with a lifting point of the balance-rod type lifting assembly;

loading a hoisted object: loading the hoisted object through the loading part;

hoisting and adjusting: slowly hoisting the steelyard hoist assembly loaded with the hoisted object, and adjusting the position of the counterweight unit in the extension direction until the steelyard hoist assembly is kept horizontal;

hoisting in place: hoisting the said balance-bar hoisting assembly loaded with the said hoisted object to the vicinity of the position of taking place by the said crane, and making the said hoisted object avoid the obstacle and enter the said position of taking place from under the obstacle by operating the said crane; and

in-place dismantling: and controlling the counterweight unit to move towards the load-carrying part, and removing the object to be hung from the load-carrying part.

9. The hoisting method of claim 8, wherein the counterweight unit comprises a plurality of counterweights, and further comprising, prior to the connecting crane:

calculating configuration: according to the hoisted object, carrying out stress settlement according to a lever principle to configure the number of counterweight blocks required for hoisting and the moving position of the counterweight unit in the extending direction, and enabling the counterweight unit to comprise the required number of counterweight blocks;

between the lifting adjustment and the lifting in place, the method further comprises the following steps:

examination by trial hoisting: and standing the weighing-rod type hoisting assembly for a preset time to check whether the abnormity exists.

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