CN105439008B - Truss hinged structures, truss extension jibs, jib systems and cranes - Google Patents

Abstract

The invention relates to the field of arm supports and discloses a truss hinge lug connecting structure, a truss extension arm support, an arm support system and a crane. The truss hinge lug connecting structure comprises a hinge lug piece (1) and a connecting rod (2) which are fixedly connected, wherein a radial through notch (3) is formed in the end face of one of the hinge lug piece (1) and the connecting rod (2), the notch (3) extends axially from the end face to a set distance, a protrusion (4) is formed in the other one of the hinge lug piece and the connecting rod, the protrusion (4) is axially embedded into the notch (3), so that an axially extending fixed contact belt is formed between the protrusion (4) and the notch (3), the connecting strength of the hinge lug can be effectively improved, and the manufacturing cost of the hinge lug is relatively reduced.

Description

Truss hinged structures, truss extension jibs, jib systems and cranes

technical field

The invention relates to the technical field of crane jibs, in particular to a truss hinge lug connection structure, a truss extension jib, a jib system and a crane.

Background technique

At present, the boom is an essential working part of construction cranes. When carrying out wind power hoisting operations, there are certain defects in the combination mode of the traditional main telescopic jib or the standard fixed jib of the crane, that is, either the height or the width is not enough, or when the height and width of the arm head are sufficient, the lifting of heavy objects will be due to The jib frame is too close to cause "touch bar" interference, which leads to a sufficient height of the boom head, but the lifting height of the heavy object is not enough, which makes it difficult to install and dismantle the wind power plant.

In order to overcome the above defects and meet the higher and heavier wind power hoisting requirements, the jib combination modes commonly used in existing truck cranes are generally tower jib, boom and goose jib modes. Among them, although the combined mode of the tower arm and the boom can easily meet the hoisting requirements of the existing mainstream 1.5MW to 3M wind turbines, the two boom systems cannot be transported as a whole due to their large size and need to be disassembled during transportation. At the same time, after the main engine of the crane is moved to its place, in addition to installing multi-section boom sections on the main telescopic boom foundation, it is also necessary to install a more complicated combination structure of struts and pull plates and an anti-backward protection system. The transportation, assembly and disassembly of the boom system is time-consuming and labor-intensive.

Compared with the former two, the goose head jib system with simple structure saves time and effort in transportation and disassembly because there is no complicated combined structure of struts and pull plates and anti-tilt protection system. Therefore, in the whole process of hoisting, With high work efficiency and economical savings, it has become a better choice for some wind power hoisting. However, this goose-head jib system also has some deficiencies. For example, the truss hinge lugs at the turning point of the goose-head jib truss structure are made of existing general and traditional solid cylindrical steel hinge lugs and are butt welded, that is, the outer diameter One end of the solid cylindrical steel that is approximately equal to the outer diameter of the truss chord is flattened into one or two hinge lugs and the overhead holes are cut, and then the other end of the solid cylindrical steel is cut into a conical shape slightly smaller than the inner diameter of the butt chord and inserted into the butt joint. In the chord, the solid cylindrical steel is directly welded to the chord along the circumferential direction. However, during the hoisting operation, the hoisting end at one end of the goose-head truss structure in the prior art lifts heavy objects, and correspondingly the solid cylindrical steel reformed hinge lug at the other end of the goose-head truss structure is at the butt weld between it and the chord. It must be subjected to axial tension and vertical shear force at the same time, and the traditional connection hinge lug is doomed to have a limited butt weld length and no better local strengthening method, so the hinge lug connection weld of this two-way force is easy to be caused by compound stress. High and cracked, this inevitably greatly limits the improvement of the overall lifting performance, making such a crane unable to perform some wind power hoisting operations with higher requirements.

Contents of the invention

The object of the present invention is to provide a truss hinge lug connection structure, which can effectively improve the joint strength of the hinge lug and relatively reduce the manufacturing cost of the hinge lug.

In order to achieve the above object, the present invention provides a truss hinge lug connection structure, which comprises a fixedly connected hinge lug and a connecting rod, wherein a hinge is formed on the end surface of one of the hinge lug and the connecting rod. There is a radially penetrating notch, and the notch extends axially for a set distance from the end face, and a protrusion is formed on the other, and the protrusion is axially embedded in the notch, so that the protrusion An axially extending fixed contact strip is formed between the notch and the notch.

Through this technical solution, since the notch is formed radially through the end face of one of the hinge ear piece and the connecting rod, that is, the notch is formed across the entire end face and can extend axially for a set distance from the end face, while The protruding part is axially embedded in the notch, and an axially extending fixed contact strip is formed between the protruding part and the notch, for example, welding can be carried out along the fixed contact strip extending in the axial direction, or by passing through the side of the notch The connector of the wall locates the protrusion in the notch so that the protrusion can be securely positioned by mating surfaces extending axially between the protrusion and the notch as well as welding or connectors as described above. In the notch, the connection strength of the hinge lug can be effectively improved, and the manufacturing cost of the hinge lug can be relatively reduced.

Further, a hinge hole is formed in at least one other part of the hinge ear piece.

Further, the hinge ear piece is formed as a hinge lug plate, the connecting rod is formed as a hollow rod, wherein the notch is formed on the wall of the opposite rod of the hollow rod, and a part of the hinge lug plate is formed as The protruding part can be embedded and fixed in the notch.

Further, the hollow rod includes a chord and a web, and the chord and the web are respectively formed with the notches; two different parts of the hinge lug are respectively formed with the protrusions, The chords and the webs are respectively fixedly connected to the hinge lugs by inserting and fixing the respective notches and the corresponding protrusions.

Further, the thickness of the protruding part is the same as the width of the notch, so that the side surface of the protruding part is close to the inner surface of the notch.

Furthermore, along the boundary where the protrusion and the notch are in contact with each other, the protrusion and the notch are welded.

Further, the number of the notches is multiple and spaced parallel to each other, the number of the hinge lugs is the same as the number of the notches, and one of the hinge lugs is embedded and fixed in each of the notches, so that The hinge lugs are parallel to each other.

Furthermore, the end surface of the hollow rod formed with the notch is provided with a sealing plate, and the sealing plate is in sealing contact with the end surface of the hollow rod and the plate surface of the hinge lug plate to seal the hollow rod Ports are fully capped.

Furthermore, the rod wall of the hollow rod facing the surface of the hinge lug plate is conically flattened to form a tapered flat opening, and the sealing plate covers the tapered flat opening and is connected with the rod of the hollow rod. The wall and the plate surface of the hinge lug plate are welded.

In addition, the present invention also provides a truss extension arm, the truss extension arm includes an extension front arm, wherein the front end of the extension front arm is provided with any one of the truss hinge lug connection structures described above.

In this way, as mentioned above, through the truss hinge lug connection structure of the present invention, the connection strength of the truss extension arm can be adjusted correspondingly.

Further, the extended front boom includes four chords to enclose the quadrilateral boom, webs are arranged between the four chords, and the truss hinge lug connection structure is arranged at the front end of each chord.

Furthermore, in the two truss hinge lug connection structures at the upper front end, the hinge lugs are formed as cross-shaped hinge lugs, and the rear and lower parts of each cross-shaped hinge lug are respectively connected to the chord and the web, while The front part is formed with a hinge hole, and the upper part is formed with a pull point pin hole.

Further, the upper part of the rear end of the extended front arm frame is provided with a super-lift bracket, the top of the super-lift bracket is used to connect the super-lift stay rope, and a bracket pull is connected between the top end and the pull point pin hole. plate.

Furthermore, there are two super-lifting brackets, and they are inclined to both sides to form an angle with each other, and a bracket pull plate is connected between the top of each super-lifting bracket and the corresponding pull point pin hole; at the same time , the upper parts of the two cross-shaped hinge lugs are also inclined to both sides correspondingly.

Furthermore, the projections of the pull point pin hole, the hinge hole and the corresponding chord in the lateral projection plane of the truss extension arm are on the same straight line.

In addition, the truss extended boom also includes an extended rear boom, wherein the extended rear boom is set in a front-opened trumpet-shaped structure with a wide front and a narrow rear, and the front end of the extended rear boom is connected to the rear of the extended front boom. end, the rear end of the extended rear boom is used to connect the boom head of the frontmost telescopic boom in the main telescopic boom system.

Further, the truss extension boom also includes an extension middle boom, the front end of the extension middle boom is connected to the rear end of the extension front boom, and the rear end of the extension middle boom is connected to the front end of the extension rear boom.

In addition, the present invention also provides a boom system, which includes an end boom and a main telescopic boom system, and the boom system also includes any of the above-mentioned truss extension booms, wherein the main The tail end of the basic arm of the telescopic boom system is used to be hinged with the turntable of the crane. The frontmost telescopic boom in the main telescopic boom system is connected to the rear end of the truss extension boom through the boom head, and the front end of the truss extension boom is connected to the end boom connect.

Since the boom system is provided with the above-mentioned truss extension boom, the overall length of the boom system can be increased. On the premise of ensuring the height of the boom head with the same design requirements, compared with the prior art, the main telescopic The boom system, especially the weak telescopic booms in the first few sections, can be stretched out as little as possible or short, and the truss extension boom can be significantly improved as a whole compared with the weak telescopic booms in the first few sections of the main telescopic boom system. The anti-bending and compressive performance of the section is improved, thereby solving the problem that the weak telescopic arms protruding from the first few sections in the prior art scheme limit the improvement of the overall lifting performance due to insufficient structural strength or local stability of the compressed plate shell.

Further, the boom system also includes a super-lift auxiliary device, wherein the mast of the super-lift auxiliary device is installed on the basic arm of the main telescopic boom system, one end of the super-lift pull plate is connected to the tail end of the basic arm, and the other end Connected to the top of the mast, one end of the super-lift stay rope is connected to the top of the mast, and the other end is connected to the extended forearm.

Further, the end boom is set as a rear open trumpet-shaped truss structure with a wide rear and a narrow front, wherein the main telescopic boom system and the extended boom of the truss are connected on the same axis, and the extended boom of the truss is in a shape of Turn and reach forward at an angle.

Finally, the present invention provides a crane, the turntable of which is provided with any one of the boom systems described above.

As mentioned above, the crane of the present invention can meet specific hoisting requirements. For example, it can significantly increase the hoisting weight to 100 tons and at the same time place the hoisting weight at a height of more than 80 meters, so as to conveniently hoist a 2MW wind turbine.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is an exploded perspective view of a truss hinge lug connection structure provided by a specific embodiment of the present invention;

Fig. 2 is a schematic view of the end face structure of the truss hinge lug connection structure provided by the specific embodiment of the present invention;

Fig. 3 is a schematic structural view of a truss extension jib provided by a specific embodiment of the present invention;

Fig. 4 is a schematic structural view of the extended front arm of the truss extended arm provided by the specific embodiment of the present invention;

Fig. 5 is a schematic structural view of the boom system provided by the specific embodiment of the present invention;

Fig. 6 is a schematic structural view of the end boom of the boom system in Fig. 5;

Fig. 7 is a schematic structural diagram of a crane provided by a specific embodiment of the present invention.

Explanation of reference signs

1-hinge ear, 2-connecting rod, 3-notch, 4-extrusion, 5-hinge hole, 6-hinge ear plate, 7-hollow rod, 8-chord rod, 9-web rod, 10- Sealing plate, 11-plate surface, 12-rod wall, 13-conical flat mouth, 14-truss extension arm frame, 15-extended front arm frame, 16-pull point pin hole, 17-super lifting bracket, 18-top, 19 -Super lifting rope, 20-Bracket pull plate, 21-Extended rear boom, 22-Main telescopic boom system, 23-Jib head, 24-Extended middle boom, 25-End boom, 26-Boom system, 27-turret, 28-super lift auxiliary device, 29-super lift pull plate, 30-mast, 31-rear guide rope pulley, 32-lead guide rope pulley, 33-pulley block, 34-protection plate.

detailed description

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

As shown in Figure 1, the truss hinge lug connection structure of the present invention includes a hinge lug 1 and a connecting rod 2 fixedly connected, wherein a radially penetrating groove is formed on the end surface of one of the hinge lug 1 and the connecting rod 2 The notch 3 extends axially for a set distance from the end surface, and the other is formed with a protruding part 4. For example, the connecting rod 2 is formed with a notch 3, and the hinge ear piece 1 is formed with a protruding part. part 4, the protruding part 4 is axially embedded in the notch 3, so that an axially extending fixed contact band is formed between the protruding part 4 and the notch 3.

In this technical solution, since the notch 3 is formed radially through the end surface of one of the hinge ear piece 1 and the connecting rod 2, that is, the notch 3 is formed across the entire end surface and can be axially extended from the end surface. distance, while the protruding part 4 is axially embedded in the notch 3, and an axially extending fixed contact band is formed between the protruding part 4 and the notch 3, for example, a fixed contact band that can extend along the axial direction Welding is performed to form an axially extending welded strip, or the protrusion is positioned in the notch 3 by a connector that passes through the side wall of the notch 3, so that the axially extending The cooperation of the mating surface and the above-mentioned welding or connecting parts can reliably position the protruding part 4 in the notch 3, thereby effectively improving the connection strength of the hinge lug and relatively reducing the manufacturing cost of the hinge lug.

Further, in the truss hinge lug connection structure of the present invention, as shown in Figure 1, at least one other part of the hinge lug 1 is also formed with a hinge hole 5, that is, if the truss arm of the boom has other tie plates To meet the needs of connecting hinges, hoisting hinges, and bracket strut installation hinges, etc., the hinge ear piece 1 of the present invention can be formed with a protruding part, and a corresponding connecting pin hole is opened at a certain position of the protruding part. That is, the hinge holes 5, that is, the hinge ear piece 1 of the present invention can be used for multiple purposes, so that at least one hinge hole 5 can be connected with a pull plate or a bracket strut as required. For example, the hinge ear piece 1 can be formed into a rectangle, a T-shape or a cross, so that notches 3 are set or protruded at the two ends of the rectangle, the three ends of the T-shape or the four ends of the cross-shape as required. part 4 and hinge hole 5.

Further, or alternatively, in order to facilitate the shaping of the hinge ear piece 1 and reduce the weight, preferably, as shown in FIG. 6 can be directly cut from a high-strength steel plate, for example, according to requirements, a rectangular, T-shaped or cross-shaped hinge ear plate 6 can be cut, and the connecting rod 2 is formed as a hollow rod 7, wherein the hollow rod 7 is opposite to the A notch 3 is formed on the bar wall 12 of the rod, and a part of the hinge lug 6 is formed as a protruding part 4 and can be embedded and fixed in the notch 3, so that the forming of the hinge lug 6 can be facilitated while ensuring the connection strength. And can effectively reduce the weight of the truss hinge lug connection structure.

In a more specific embodiment, as shown in Figure 1, the hollow rod 7 includes a chord 8 and a web 9, the chord 8 and the web 9 are respectively formed with notches 3; the hinge lug 6 is formed in a T shape , two different parts of the T-shape are respectively formed with protrusions 4, while the other part is formed with a hinge hole 5, wherein, through the embedding and fixing of respective notches 3 and protrusions 4, such as embedding and welding, the string The rod 8 and the web rod 9 are fixedly connected to the hinge lug plate 6 respectively.

Furthermore, in order to improve the stability of the cooperation between the protruding part 4 and the notch 3, so as to further improve the connection strength between the two, preferably, the thickness of the protruding part 4 is the same as the width of the notch 3, so that the protruding The side surface of the part 4 is close to the inner surface of the notch 3, so that a tight contact boundary is formed between the inner surface of the notch 3 and the protruding part 4, so as to improve the reliability of the assembly of the two.

As mentioned above, an axially extending fixed contact strip is formed between the protrusion 4 and the notch 3, for example, along which axially extended fixed contact strip can be welded to form an axially extended welded strip, or The protrusion is positioned in the slot 3 by means of connectors passing through the side walls of the slot 3 . Therefore, in order to reduce the production cost and ensure the connection strength at the same time, preferably, the thickness of the protruding part 4 is the same as the width of the notch 3, so that the side surface of the protruding part 4 is close to the inner surface of the notch 3, and at the same time, along the Along the boundary where the protruding part 4 and the notch 3 are in contact with each other, the protruding part 4 and the notch 3 are welded together.

For example, in the case that only the chord 8 and the hinge lug 6 are connected by welding, after the protruding part 4 is inserted into the notch 3, it can be welded along the connecting seam between the two to form an axially extending Welding strips, in this way, the welding seam where the protruding part 4 and the notch 3 are butted is a linear welding seam, which is relatively simple to weld, can realize mechanical automatic welding, and can also ensure the consistency of the welding seam before and after. In addition, the sum of the length of the straight line welds on both sides of the connection between the notch 3 and the extension 4 can be much greater than the length of the outer circumference of the chord in the prior art where the traditional round steel reformed hinge lug and the chord are directly butt welded. The increase of seam length will greatly reduce the weld stress during work and improve the overall axial bearing capacity of the truss structure. Since the weld seam with the same axial extension as the tensile force is formed, the traditional boom connection structure can only bear pressure. Cannot be limited by pull.

And in the situation that the chord 8 and the web 9 are welded to the hinge lug 6 at the same time, as shown in Fig. The large axial load along the web member 9 is the vertical shear force relative to the chord member 8 . Specifically, when bearing the axial force component of the chord 8 and the vertical shear force component at the same time, the component forces in the two directions are respectively borne by the linear welds at the boundaries of the respective notches on the chord 8 and the web 9, and the force The delivery path is clear and simple. Therefore, the hinge lug 6 is subjected to bidirectional force as a whole, but the two welds are basically unidirectionally stressed, and the combined stress of both will not be too high, and the joint strength of the weld can meet the bidirectional force of the hinge lug.

Of course, on the basis of any of the above, those skilled in the art can also realize that the number of notches 3 and hinge lugs 6 can be set according to actual needs, that is, as shown in Figure 1, the number of notches 3 The number of hinge lugs 6 is the same as the number of notches 3, and each notch 3 is embedded with a hinge lug 6 so that the hinge lugs 6 are parallel to each other. 6 and the welding connections of the notch 3 are all as described above, and will not be described in detail here.

In addition, in the case that the connecting rod 2 is a solid rod and the end surface of the solid rod is provided with a notch 3, after the hinge lug plate 6 is inserted into the notch 3, the hinge lug plate 6 and the groove can be aligned along the axial direction and the end surface. The seam of port 3 is welded to prevent water from entering the interior between the two and rusting the parts.

In the case where the connecting rod 2 is a hollow rod 7, such as the chord 8 and the web 9, as shown in Figure 2, the end surface of the hollow rod 7 formed with the notch 3 is provided with a sealing plate 10, and the sealing plate 10 Sealing contact with the end face of the hollow rod 7 and the plate face 11 of the hinge lug 6 to completely cover the port of the hollow rod 7, e.g. The port spaces on both sides are respectively closed by the sealing plates 10 , and in the case of multiple, for example, two hinge lug plates 6 , the outermost port space and the port space between the hinge lug plates 6 pass through the corresponding sealing plates 10 at the same time. To be closed to prevent water seepage and rust.

And in a preferred application structure of the sealing plate 10, as shown in FIG. On the tapered flat mouth 13 and welded with the rod wall 12 of the hollow rod 7 and the plate surface 11 of the hinge lug plate 6, like this, the sealing plate 10 can not only prevent water seepage and get rusty, and the welding seam of the sealing plate 10 and the rod wall 12 And the welding seam of the sealing plate 10 and the plate surface 11 of the hinge lug plate 6 will continue to extend to form a ring structure, thereby also improving the axial connection strength of the hinge lug plate 6 and the hollow rod 7 to a certain extent.

In addition, on the basis of the above, the present invention also provides a truss extension arm, that is, as shown in Figure 3, the truss extension arm 14 of the present invention includes an extension front arm 15, wherein the front end of the extension front arm 15 is shown in Fig. The right end of 3 is provided with any of the truss hinge lug connection structures described above, wherein the connecting rod 2 is formed as a part of the extended front arm frame 15, and the hinge ear piece 1 is used to connect the end arm frame 25 described below.

In this way, as mentioned above, the connection strength of the hinge lugs at the turning point of the extension arm of the truss can be adjusted correspondingly, so that the jib system including the extension arm of the truss can lift heavy objects with specific requirements.

Further, as shown in Figure 4, in a specific structure of extending the front arm frame 15, the extension front arm frame 15 includes four chords 8 to surround the quadrilateral arm frame, so as to improve the flexural modulus of the overall cross section of the arm frame, At the same time, webs 9 are arranged between the four chords 8, for example, the two ends of the four chords 8 are respectively connected sequentially by four webs 9, and at the same time, the length direction of the four chords 8 is also according to Multiple web members 9 need to be provided, and the front end of each chord member 8 is provided with a truss hinge lug connection structure, thereby significantly reducing the lateral wind load borne by the extended front arm frame 15 as a whole, and correspondingly, the truss extension arm can be significantly improved. The overall lateral bending resistance of the frame.

Furthermore, as shown in Figure 4, in the connection structure of the two truss hinge lugs at the upper part of the front end, the hinge lug parts 1 are formed as cross-shaped hinge lug plates 6, and the rear and lower parts of each cross-shaped hinge lug plate 6 are The chords 8 and the webs 9 are respectively connected, and the front part is formed with a hinge hole 5, and the upper part is formed with a pull point pin hole 16, so that a single hinge lug 6 can realize the connection of components in four directions.

Further, as shown in Figure 4, the rear end top of the extended front arm frame 15 is provided with a super-raised bracket 17, the top 18 of the super-raised bracket 17 is used to connect the super-raised stay cord 19, and the top 18 and the pull point pin hole 16 is connected with support pull plate 20, like this, compared with the scheme of the prior art that is super-raised before being connected to the arm head of the main arm, the super-raised bracket 17 on the extended front arm frame 15 of the present invention can increase the super-raised front simultaneously. The stretching distance of the pull point, the height of the pull point before superlift relative to the neutral layer of the boom system, through the arrangement of the pull point position before superlift according to the present invention, the stiffness of the entire boom system on the luffing plane and the slewing plane are all at the same time A further significant improvement is obtained, and correspondingly, the stress level of the boom, the deflection of the boom and the side bending of the boom can be further reduced, so that in the boom system described below, the overall lifting of the boom system by the super-lifting auxiliary device The performance effect is more pronounced.

Furthermore, as shown in Figure 4, there are two super-lifting brackets 17, and they are inclined to both sides to form an angle with each other. There are bracket pull plates 20 connected between them; meanwhile, the upper parts of the two cross-shaped hinge lug plates 6 are also inclined to both sides accordingly. In this way, through the two super-lifting brackets 17, the left and right opening width of the super-lifting front pulling point can be further improved, and at the same time, the two cross-shaped hinge lugs 6 are correspondingly inclined to both sides, so that the hinge lugs on one side 6 is correspondingly connected to the super-lifting bracket 17 inclined on the same side, so that the overall lifting performance of the super-lifting auxiliary device lifting boom system is more obvious.

Furthermore, the projections of the pull point pin hole 16, the hinge hole 5 and the corresponding chord 8 in the lateral projection plane of the truss extension jib are on the same straight line, that is, the chord 8 and the hinge hole 5 are on the same straight line , and the protruding part of the hinge lug plate 6 formed with the pull point pin hole 16 is inclined to the outside, so that in the lateral projection plane of the extended arm of the truss, the projection of the pull point pin hole 16 is also consistent with the chord 8 and the hinge hole 5 The projections are on the same straight line, so that the axial tension component transmitted by the chord 8 on the top of the front arm frame 15 to the hinge hole at the front end of the hinge lug 6 and the pull point pin hole 16 of the hinge lug 6 transmitted by the bracket pull plate 20 The tension components of the tension in the lateral projection plane of the extended front arm frame 15 are on the same straight line, and the difference between the two tension components directly subtracted after being transmitted in the plate surface of the hinge lug plate 6 is significantly reduced, and the tension component The difference is then transmitted to the upper chord 8 and the connected web 9 . Due to the direct subtraction of the above two tension components, the upper and lower hinge lugs at the front end of the extended front arm frame 15 and the vertical webs 9 connected therebetween are considered as a whole, and the front section of the upper and lower chords of the extended front arm frame 15 is taken as the analysis object. The axial force and vertical shear force on the upper and lower chords have been greatly reduced.

Further, as shown in FIG. 3 , the truss extended boom 14 also includes an extended rear boom 21, wherein the extended rear boom 21 is set to a front-opening trumpet-shaped structure with a wide front and a narrow rear, so as to be able to significantly Improve the cross-sectional bending and compression resistance of the extended rear boom 21 and the truss extended boom 14, the front end of the extended rear boom 21 is connected to the rear end of the extended front boom 15, and the rear end of the extended rear boom 21 is used to connect the main telescopic The arm head 23 of the telescopic arm at the front end in the arm system 22, for example, the rear end of the extended rear arm frame 21 can be narrowed as required to be identical with the section of the arm head 23, thereby facilitating the connection of the two, and the extended rear arm frame The front end of 21 can be enlarged according to requirements, so that the enlarged size can be much larger than the cross-sectional size of the arm head 23, thereby significantly improving the bending and compressive resistance of the section of the extended rear arm frame 21 and the truss extended arm frame 14, and can Significantly improves the overall stability of the end jib 25 described below while reducing the stress on the upper and lower chords in the truss extension jib and the end jib 25 .

Further, as shown in Figure 3, the truss extension arm 14 also includes an extension middle arm 24, the front end of the extension middle arm 24 is connected to the rear end of the extension front arm 15, and the rear end of the extension middle arm 24 is connected to Extend the front end of the rear arm frame 21.

In addition, the present invention also provides a boom system 26, as shown in Figure 5, the boom system 26 includes the end boom 25 and the main telescopic boom system 22, wherein the boom system 26 also includes any of the above trusses Extend the jib frame 14, wherein the tail end of the basic arm of the main telescopic boom system is used to be hinged with the turntable 27 of the crane, and the frontmost telescopic boom in the main telescopic boom system is connected to the rear end of the truss extension boom frame 14 through the arm head 23 , the front end of the truss extension boom 14 is connected with the end boom 25 .

In this way, the boom system is provided with the above-mentioned truss extension boom, so that the overall length of the boom system can be increased. Under the premise of ensuring the height of the boom head with the same design requirements, compared with the prior art, the main boom described in the present invention The telescopic boom system, especially the weak telescopic booms in the first few sections, can be extended as little as possible or shorter, and the truss extension boom can be integrated as a whole compared with the weak telescopic booms in the first few sections of the main telescopic boom system It can significantly improve the anti-bending and compressive performance of the section, thus solving the problem that the weak main telescopic boom protruding from the first few sections in the prior art solution limits the improvement of the overall lifting performance due to insufficient structural strength or local stability of the compressed plate shell. question.

In addition, the boom system 26 also includes a super lifting auxiliary device 28, wherein the mast 30 of the super lifting auxiliary device 28 is installed on the basic arm of the main telescopic boom system, and one end of the super lifting pull plate 29 is connected to the tail end of the basic arm, The other end is connected to the top of the mast 30, and one end of the stay rope 19 is connected to the top of the mast 30, and the other end is connected to the extended front arm frame 15, for example, can be connected to the top 18 of the super-raised support 17, like this, by this By arranging the position of the super-lifting front pulling point on the extended front boom 15, the stiffness of the entire boom system on the luffing surface and the turning surface is further significantly improved at the same time, so that the corresponding boom stress level, boom deflection and boom side bending It can be further reduced, so that the effect of the super-lifting auxiliary device 28 of the present invention on improving the overall lifting performance of the jib system is more obvious.

In addition, as shown in Figure 6, the end boom 25 is set as a rear-open horn-shaped truss structure with a wide rear and a narrow front. , and the end jib 25 is inclined laterally relative to the truss extension jib 14, that is, it turns and protrudes forward at an angle relative to the truss extension jib 14, and the angle can be set according to actual needs. In this way, different from the triangular simple truss method adopted in the prior art scheme, the end boom 25 of the present invention is a rear-opened trumpet-shaped truss structure with a wide rear and a narrow front as a whole, which can significantly increase the cross-sectional height of the truss arm section The size and the bending modulus of the overall cross-section are improved, which can significantly reduce the stress of the upper and lower chords during work, and then significantly improve the bearing capacity of the goose-head type end boom 25.

Furthermore, the rear end of the goose-head type end arm frame 25 of the present invention is as wide as the extended front arm frame 15, and the rear end surface of the end arm frame 25 intersects obliquely with the extended front arm frame 15 at a certain angle according to design requirements, so that the end arm After the frame 25 is connected with the front end of the extended front arm frame 15, it naturally turns and stretches forward according to the corresponding angle. In this way, when the main telescopic arm is at the same elevation angle during work, the hook can obtain a larger working range, and avoid lifting heavy objects at a higher angle. The high seating height interferes with the jib frame collision, thereby maximizing the use of the lifting height of the jib frame.

In addition, as shown in Figure 6, a rear guide pulley 31 is installed on the upper rear end of the end jib frame 25 of the present invention so as to facilitate the positioning of the hoisting wire rope and prevent direct friction of the wire rope. The front end of the end jib frame 25 of the goose head type is a locally reinforced truss structure arm head, and a leading rope pulley 32 is also installed on the upper part of the front end to facilitate the positioning and guiding of the hoisting wire rope and prevent direct friction of the wire rope; the lower part of the front end is installed with a corresponding The lower pulley group 33 of several fixed pulleys is set according to the wire rope magnification required for the maximum lifting capacity of the goose-head arm. The lower part of the left and right sides of the lower pulley group has two fan-shaped plate structure protection plates 34 welded on the pulley bushing. The size of the outer arc of the fan-shaped plate is slightly larger than the outer radius of the fixed pulley, and a narrow arc-shaped plate is welded tangentially on the outer side of the outer arc to facilitate the relative sliding of the goose-headed end arm frame 25 during transportation and installation and to prevent fixed pulleys. Collision and wear of the pulley block.

On the basis of the above, the present invention also provides a crane. As shown in FIG. 7 , the turntable 27 of the crane is provided with any one of the jib systems 26 described above.

In this way, the crane of the present invention can carry out some specific hoisting operations according to requirements after being equipped with the goose head type jib system 26 provided by the present invention. The position height can reach more than 80 meters, so the 2MW wind turbine can be hoisted by using the goose-head boom system 26.

The preferred embodiment of the present invention has been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the specific details of the above embodiment, within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, These simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that the various specific technical features described in the above specific implementation manners may be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not further described in the present invention.

In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (19)

1. a kind of truss cuts with scissors ear-pole connection structure, it is characterised in that including the hinge ear piece (1) being fixedly connected and connecting rod (2), its In, it is described hinge ear piece (1) and connecting rod (2) in one end face on be formed with the notch (3) extended radially through, the notch (3) from End face, which initially axially extends, is formed with extension (4) in setpoint distance, another one, the embedded groove in extension (4) axial direction In mouth (3) so that axially extending fixed contact band, the hinge ear piece are formed between the extension (4) and the notch (3) (1) hinge otic placode (6) is formed as, the connecting rod (2) is formed as hollow stem (7), wherein, the relative bar wall of the hollow stem (7) On be formed with the notch (3), a part for the hinge otic placode (6) is formed as the extension (4) and can be embedded in be fixed on In the notch (3), the hollow stem (7) includes chord member (8) and web member (9), and the chord member (8) and the web member (9) are respectively It is formed with the notch (3)；The extension (4), the chord member are formed respectively on two different parts of the hinge otic placode (6) (8) it is respectively welded with the web member (9) by the respective notch (3) and the embedded fixation of the corresponding extension (4) In the hinge otic placode (6).

2. truss according to claim 1 cuts with scissors ear-pole connection structure, it is characterised in that at least one of the hinge ear piece (1) Other positions are also formed with hinge hole (5).

3. truss according to claim 1 cuts with scissors ear-pole connection structure, it is characterised in that the thickness of the extension (4) and institute The width for stating notch (3) is identical so that be close to the inner surface of the notch (3) in the side surface of the extension (4).

4. truss according to claim 3 cuts with scissors ear-pole connection structure, it is characterised in that along the extension (4) and described The border that notch (3) contacts with each other, the extension (4) and the notch (3) welding.

5. truss according to claim 1 cuts with scissors ear-pole connection structure, it is characterised in that the quantity of the notch (3) is multiple And it is spaced parallel, the quantity of the hinge otic placode (6) is identical with the quantity of the notch (3), and each notch (3) embeds Enter to be fixed with a hinge otic placode (6) so that the hinge otic placode (6) is parallel to each other.

6. truss according to claim 5 cuts with scissors ear-pole connection structure, it is characterised in that the hollow stem (7) is formed with described The end face of notch (3) is provided with shrouding (10), the shrouding (10) and the end face and the hinge otic placode (6) of the hollow stem (7) Plate face (11) it is in sealing contact so that the port of the hollow stem (7) to be covered completely.

7. truss according to claim 6 cuts with scissors ear-pole connection structure, it is characterised in that described in the direction of the hollow stem (7) The bar wall (12) of hinge otic placode (6) plate face is scabbled by taper to form taper flat mouth (13), and shrouding (10) is covered in the taper and put down On mouthful (13) and the plate face (11) of the bar wall (12) with the hollow stem (7) and the hinge otic placode (6) is welded.

8. a kind of truss extends arm support, it is characterised in that the truss extension arm support (14) includes arm support (15) before extension, its In, the front end of arm support (15) is provided with the truss hinge ear connection according to any one in claim 1-7 before the extension Structure.

9. truss according to claim 8 extends arm support, it is characterised in that arm support (15) includes four strings before the extension Bar (8) is provided with web member (9) with quadrangle arm support of encircling a city between four chord members (8), the front end of every chord member (8) is set State truss hinge ear-pole connection structure.

10. truss according to claim 9 extends arm support, it is characterised in that two truss hinge ear connection of upper front end In structure, hinge ear piece (1) is formed as criss-cross hinge otic placode (6), the rear portion of each criss-cross hinge otic placode (6) and bottom difference Chord member (8) and web member (9) are connected, and front portion is formed with hinge hole (5), top is formed with drawing point pin-and-hole (16).

11. truss according to claim 10 extends arm support, it is characterised in that before the extension on the rear end of arm support (15) Portion is provided with setting-up support (17), and the top (18) of the setting-up support (17) is used to connect setting-up drawstring (19), and the top Support arm-tie (20) is connected between end (18) and the drawing point pin-and-hole (16).

12. truss according to claim 11 extends arm support, it is characterised in that the setting-up support (17) is two, and And tilt to form angle, the top (18) of each setting-up support (17) and a corresponding drawing point pin-and-hole each other to both sides respectively (16) support arm-tie (20) is connected between；

Meanwhile, the top of two criss-cross hinge otic placodes (6) is also respectively tilted to both sides.

13. truss according to claim 12 extends arm support, it is characterised in that the drawing point pin-and-hole (16), described be hinged The projection of hole (5) and the corresponding chord member (8) in the side projection face that truss extends arm support is on same straight line.

14. the truss extension arm support according to any one in claim 8-13, it is characterised in that the truss extension arm Frame also include extension rear arm support (21), wherein, extension rear arm support (21) be set to it is front wide and rear narrow before open flared structure, prolong The front end of long rear arm support (21) is connected to the rear end of arm support (15) before the extension, and the rear end of extension rear arm support (21) is used to connect The arm head (23) of telescopic arm in main flexible arm system (22) foremost.

15. truss according to claim 14 extends arm support, it is characterised in that the truss extension arm support, which also includes, to be prolonged The front end of arm support (24) is connected to the rear end of arm support (15) before the extension, arm support in extension in arm support (24), extension in length (24) rear end is connected to the front end of extension rear arm support (21).

16. a kind of boom system, including last arm support (25) and main flexible arm system (22), it is characterised in that the boom system (26) the truss extension arm support (14) according to claim 8-15 any one is also included, wherein, the main telescopic arm system The tail end of the basic arm of system is used to be hinged with the turntable (27) of crane, and the telescopic arm in main flexible arm system (22) foremost leads to Cross arm head (23) and be connected with the rear end that truss extends arm support (14), the front end of truss extension arm support (14) connects with last arm support (25) Connect.

17. boom system according to claim 16, it is characterised in that it is auxiliary that the boom system (26) also includes setting-up Device (28) is helped, wherein, the mast (30) of setting-up servicing unit (28) is installed on the basic arm of main flexible arm system (22), setting-up One end of arm-tie (29) is connected to the tail end of basic arm, and the other end is connected to the top of mast (30), the one of setting-up drawstring (19) End is connected to the top of mast (30), and the other end is connected to arm support (15) before extension.

18. the boom system according to claim 16 or 17, it is characterised in that before the last arm support (25) is wide after being set to The narrow tubaeform truss structure of rear open type, wherein,

Main flexible arm system (22) and truss extension arm support (14) coaxial line connection, and last arm support (25) is relative to truss extension arm Frame (14) is transferred at an angle to protract.

19. a kind of crane, it is characterised in that be provided with the turntable (27) of the crane according to claim 16-18 Boom system described in any one.