CN112551396A - Wind power hoisting tower crane truss type chassis suitable for all-terrain weak earth pressure anti-inclination - Google Patents

Abstract

The invention discloses a truss type underframe of a wind power hoisting tower crane applicable to all-terrain weak earth pressure anti-inclination, and belongs to the technical field of hoisting machinery. The chassis is including supporting the cross chassis of base festival bottom below at the bottom of the tower, and both ends articulate four bearing diagonal that connect at base festival upper portion and cross chassis top surface at the bottom of the tower respectively, support four groups of supports and base distance broad face landing legs of four farthest end belows at the cross chassis, all combine together through altitude mixture control formula ball pivot subassembly between every support and the cross chassis. The underframe disclosed by the invention can meet the construction requirements of an all-terrain geological foundation with low foundation bearing capacity requirement, inclination resistance and simple foundation, can be compatible with the differences of various geological foundations, has the advantages of reasonable stress, light and handy structure, light dead weight, low manufacturing cost, convenience in mounting and dismounting, convenience in transition and transportation and convenience in operation, and is particularly suitable for being used with wind power hoisting tower cranes with short construction period and frequent transition.

Description

Wind power hoisting tower crane truss type chassis suitable for all-terrain weak earth pressure anti-inclination

Technical Field

The invention belongs to the technical field of hoisting machinery, and particularly relates to a truss type underframe of a wind power hoisting tower crane suitable for all-terrain weak ground pressure anti-inclination, which is particularly suitable for matching with the wind power hoisting tower crane with short construction period and frequent transition.

Background

The self-supporting tower crane is characterized in that the upper part of the tower crane stands on the ground after being connected with the underframe structure, so that load is transferred to the ground foundation, and the underframe structure can be connected with the ground through a pre-buried foundation, a ground anchor type underframe or a ballast type underframe. The pre-buried underframe has low cost, can not be reused, is difficult to disassemble, and is generally suitable for occasions with long construction period and infrequent tower crane transition. The ground anchor type or ballast type underframe generally adopts a box girder structure, has high manufacturing cost, can be repeatedly used, but has the defects of difficult installation, inconvenient transition and transportation because the underframe is stressed complexly, has large structural size and is very heavy. Because the construction period of each project of the wind power hoisting tower crane is short, about 5-7 days, the transition is very frequent, the underframe part needs to be frequently disassembled and assembled, and the differences of the geological foundation, the economical efficiency of construction and the convenience of assembly, disassembly and transportation are considered, so that the underframe needs to meet the construction requirements of the all-terrain geological foundation, such as low foundation bearing capacity, simple foundation treatment, no permanent foundation, light and handy structure and the like.

Disclosure of Invention

The invention aims to provide the truss type underframe of the wind power hoisting tower crane, which is suitable for all-terrain weak ground pressure anti-inclination, aiming at the defects in the prior art. The underframe disclosed by the invention can meet the construction requirements of an all-terrain geological foundation with low foundation bearing capacity requirement, inclination resistance and simple foundation, can be compatible with the differences of various geological foundations, has the advantages of reasonable stress, light and handy structure, light dead weight, low manufacturing cost, convenience in mounting and dismounting, convenience in transition and transportation and convenience in operation, and is particularly suitable for being used with wind power hoisting tower cranes with short construction period and frequent transition.

The object of the invention can be achieved by the following technical measures:

the invention relates to a truss type underframe of a wind power hoisting tower crane suitable for all-terrain weak earth pressure anti-inclination, which comprises a truss type cross underframe (the cross underframe is in a truss type structure and serves as an installation foundation of a tower bottom foundation section and is in supporting connection with the tower bottom foundation section, the load on the upper part of the tower crane is transmitted to the cross underframe through a tower body chord member, a web member part and an inclined support to bear pressure and tension), four inclined supports (supported between the upper part of the tower bottom foundation section and the cross underframe to transmit the load on the upper part) with two ends respectively hinged to the upper part of the tower bottom foundation section and the top surface of the cross underframe, four groups of supports and foundation distance wide-surface support legs (the grounding pressure can be greatly reduced through the foundation distance wide-surface support legs) supported below the four farthest ends of the cross underframe, and the construction requirements of an all-terrain geological foundation with low foundation, can be compatible with the differences of multiple geological foundations), its characterized in that: each support is combined with the cross-shaped underframe through a height-adjusting spherical hinge assembly (the height-adjusting spherical hinge assemblies can enable four groups of supports and wide-area base legs to be stressed uniformly, and a leveller is matched to detect the levelness of the underframe, so that the danger of equipment caused by errors generated by foundation settlement is avoided, the integral anti-inclination capability of the tower crane is improved, the construction requirements of an all-terrain geological foundation with uneven foundation and simple foundation can be met, and the differences of various geological foundations can be compatible); the height-adjustable spherical hinge component comprises a spherical column which is processed by a cylinder, wherein the upper part of the spherical hinge component is of a hemispherical structure, the lower part of the spherical column is of an external thread section, an inner cavity of the spherical hinge component is a hemispherical groove matched with the hemispherical structure, and an upper support block which is fixed on the bottom surface of the farthest end of the cross-shaped chassis is in spherical fit with the hemispherical groove, has a self-leveling function, and improves the integral anti-inclination capacity of the tower crane, the inner cavity of the spherical hinge component is an internal thread cavity matched with the external thread section, and is fixed on the top surface of a support (the lower part of the spherical column is in threaded fit with the lower support block to realize quick connection, and the height can be adjusted according.

The length of the external thread section in the ball column is greater than that of the internal thread cavity in the lower support block (so that the height can be easily adjusted by rotating the ball column, the levelness of the underframe is detected by matching with a level gauge, the underframe can be quickly leveled, the danger of equipment caused by errors generated by foundation settlement is avoided, and the integral anti-inclination capability of the tower crane is improved).

The cross-shaped underframe comprises an intermediate connecting piece formed by fixedly combining an upper connecting section and a diagonal cross in an up-and-down superposition manner (the intermediate connecting piece is supported and connected with a tower bottom base joint through the upper connecting section, the intermediate connecting piece is hinged with four straight beams through the diagonal cross to form a cross-shaped big underframe, has the advantages of light structure, light dead weight and low manufacturing cost), straight beams which are respectively hinged with four ends of the diagonal cross and extend outwards (the straight beams are hinged with the diagonal cross to form the cross-shaped big underframe, can be quickly opened or closed according to the needs of work or transportation, have the advantages of convenient transition, convenient assembly and disassembly, convenient transportation, simple operation and convenient use), two horizontal long supporting rods which are hinged and supported at the far ends of the four straight beams and are combined with the four straight beams to form two opposite-top triangles (the horizontal long supporting rods enclose two adjacent straight beams into a stable triangular bracket, the straight beam and the short beam in the diagonal cross are fixed into a straight line, the lateral stability of the straight beam is increased, and the load in the horizontal direction is transferred), and four horizontal short support rods (which increase the rigidity of the triangular support and transfer the load in the horizontal direction) are supported at the four near ends of the diagonal cross and the middle part of the horizontal long support rods at the corresponding side; the cross section of the upper connecting section is the same as that of the tower bottom foundation section (when the tower crane is supported by the wind power hoisting tower crane, the tower bottom foundation section is directly lapped on the upper connecting section, and then the standard section of the tower body is lapped above the tower bottom foundation section, so that the wind power hoisting tower crane is simple to operate and convenient to use).

The upper ends of the four inclined supports are respectively hinged to the upper parts of the four chords of the tower bottom foundation section, and the lower ends of the four inclined supports are respectively hinged to the top surfaces of the far ends of the four linear beams (the inclined supports are connected to the chords of the tower bottom foundation section and the linear beams to form a right-angle large triangular support frame to bear the load of the upper part of the tower crane, so that the stress condition of the traditional mode that the cross section of the tower bottom foundation section is used as a main support is greatly improved, and the tower bottom foundation section has the advantages of reasonable stress, simple structure, light dead.

The support is a quadrangular frustum pyramid structure consisting of a lower bottom plate, an upper bottom plate, vertical rib plates and sealing plates (the frustum pyramid structure with a large lower part and a small upper part is convenient for uniformly and dispersedly transferring the upper load to the lower support leg); the lower bottom plate extends outwards beyond the lower edge of the sealing plate (a pressing block can be conveniently and quickly pressed on the lower bottom plate); the center of the upper bottom plate is provided with an internal thread matched with the external thread section of the ball column and matched with the internal thread cavity in the lower support block (ensuring that the ball column is smoothly rotated for height adjustment).

The base distance wide-surface supporting leg is of a cuboid box-shaped structure (load can be uniformly transmitted to the ground conveniently), and a positioning strip and a pressing block are arranged on the base distance wide-surface supporting leg (the positioning strip is convenient for quickly positioning the lower bottom plate, and the pressing block is used for quickly pressing the lower bottom plate); the area of the bottom surface of the foundation distance broad-face supporting leg is not less than 16 square meters (compared with the traditional foundation distance of less than 12 square meters and a tower body pre-embedded base structure, the grounding pressure of the foundation distance broad-face supporting leg is greatly reduced, so that the geological foundation can be simply treated, and the foundation distance broad-face supporting leg is suitable for all terrains.

The design principle of the invention is as follows:

the invention improves the connection mode of the supporting legs and the cross-shaped underframe in the traditional wind power hoisting tower crane cross-shaped underframe system, namely, the self-leveling transitional connection of the height-adjusting type spherical hinge assembly replaces the direct combination of the traditional supporting legs and the cross-shaped underframe, so that the four groups of supporting seats and the wide-area supporting legs with the base distance can be uniformly stressed by utilizing the height-adjusting type spherical hinge assembly, and the levelness of the underframe is detected by matching with a level gauge, thereby not only avoiding the danger of equipment caused by the error generated by the settlement of the foundation, but also improving the integral inclination resistance of the tower crane, meeting the construction requirements of the all-terrain geological foundation with uneven foundation and simple foundation, and being compatible with the difference of various geological foundations. And the area of the bottom surface of the foundation distance broad-face supporting leg is not less than 16 square meters, compared with the traditional foundation distance of less than 12 square meters and the tower body pre-embedded base structure, the grounding pressure of the foundation distance broad-face supporting leg is greatly reduced, so that the geological foundation can be simply treated, and the foundation distance broad-face supporting leg is suitable for all terrains. In addition, the invention reserves the cross-shaped underframe of the truss structure in the traditional wind power hoisting tower crane cross-shaped underframe system and the inclined support supported between the top surface of the linear beam of the cross-shaped underframe and the upper part of the chord member of the tower bottom base section, namely the cross-shaped large underframe which can be quickly opened or closed according to the work or transportation needs is formed by the diagonal cross at the lower part of the middle connecting piece and the four linear beams which are hinged and connected, can be integrally transported without being disassembled, and has the advantages of convenient transition, convenient transportation, simple operation and convenient use; the invention forms a right-angle large triangular support frame after the chord member and the straight beam of the tower bottom foundation section are connected through the inclined support, the load on the upper part of the tower crane is stably transmitted to the cross-shaped underframe through the chord member, the web member part and the inclined support of the tower body, the stress condition of the traditional main support by using the cross section of the tower bottom foundation section is greatly improved, and the invention has the advantages of reasonable stress, simple structure, light dead weight, low cost, economy and practicability.

The invention has the following beneficial technical effects:

the underframe disclosed by the invention can meet the construction requirements of an all-terrain geological foundation with low foundation bearing capacity requirement, inclination resistance and simple foundation, can be compatible with the differences of various geological foundations, has the advantages of reasonable stress, light and handy structure, light dead weight, low manufacturing cost, convenience in mounting and dismounting, convenience in transition and transportation and convenience in operation, and is particularly suitable for being used with wind power hoisting tower cranes with short construction period and frequent transition.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a schematic view of the structure of the chassis.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a schematic structural view of the height-adjustable ball hinge assembly.

Fig. 6 is a schematic structural view of the cradle.

Fig. 7 is a top view of fig. 6.

Fig. 8 is a schematic structural view of the leg.

Fig. 9 is a top view of fig. 8.

Number in the figure: 1. a tower bottom base section; 2. obliquely supporting; 3. the device comprises a cross-shaped underframe, 3-1 parts of middle connecting pieces, 3-1-1 parts of upper connecting sections, 3-1-2 parts of diagonal crosses, 3-2 parts of straight beams, 3-3 parts of horizontal long support rods and 3-4 parts of horizontal short support rods; 4. 4-1 of a support, 4-2 of a lower bottom plate, 4-3 of an upper bottom plate, 4-4 of a vertical rib plate and 4-4 of a sealing plate; 5. 5-1 parts of base distance wide-surface supporting legs, 5-2 parts of positioning strips and pressing blocks; 6. the height-adjustable spherical hinge assembly comprises a height-adjustable spherical hinge assembly 6-1, a spherical column 6-1-1, a hemispherical structure 6-1-2, an external thread section 6-2, an upper supporting block 6-2-1, a hemispherical groove 6-3, a lower supporting block 6-3-1 and an internal thread cavity.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

the invention relates to a truss type underframe of a wind power hoisting tower crane suitable for all-terrain weak earth pressure anti-inclination, which comprises a truss type cross underframe 3 (the cross underframe 3 is in a truss type structure and serves as an installation foundation of a tower bottom foundation section 1 and is in support connection with the tower bottom foundation section 1, the load on the upper part of the tower crane is transmitted to the cross underframe through a tower body chord member, a web member part and an inclined support 2 to bear pressure and tension), four inclined supports 2 (supported between the upper part of the tower bottom foundation section and the cross underframe and used for transmitting the load on the upper part of the tower crane) with two ends respectively hinged to the upper part of the tower bottom foundation section and the top surface of the cross underframe, four groups of supports 4 and foundation distance wide surface support legs 5 (the grounding pressure can be greatly reduced through the foundation distance wide surface support legs 5, the requirement of low foundation bearing capacity can be met, The simple construction requirement of all-terrain geological foundation in basis can compatible multiple geological foundation's difference), its characterized in that: each support 4 is combined with the cross-shaped underframe 3 through a height-adjusting spherical hinge assembly 6 (the four groups of supports 4 and the wide-area base support legs 5 can be uniformly stressed by adopting the height-adjusting spherical hinge assemblies, and the levelness of the underframe is detected by matching with a level gauge, so that the danger of equipment caused by errors generated by foundation settlement is avoided, the integral anti-inclination capability of the tower crane is improved, the construction requirements of an all-terrain geological foundation with uneven foundation and simple foundation can be met, and the difference of various geological foundations can be compatible); the height-adjustable spherical hinge component 6 comprises a spherical column 6-1 which is formed by processing a cylinder, the upper part of the spherical column is a hemispherical structure 6-1-1, the lower part of the spherical column is an external thread section 6-1-2, an inner cavity is a hemispherical groove 6-2-1 matched with the hemispherical structure 6-1-1, an upper supporting block 6-2 which is fixed on the lower bottom surface of the farthest end of the cross-shaped underframe 3 (the hemispherical structure 6-1-1 and the hemispherical groove 6-2-1 are in spherical fit, have a self-leveling function and improve the integral anti-tilting capability of the tower crane), the inner cavity is an internal thread cavity 6-3-1 matched with the external thread section 6-1-2 and a lower supporting block 6-3 which is fixed on the top surface of the supporting seat 4 (the lower part of the spherical column 6-1 is combined with the lower supporting block 6-, and can be easily realized only by rotating the ball column 6-1 when the height is required to be adjusted according to actual conditions).

The length of the external thread section 6-1-2 in the ball column 6-1 is larger than that of the internal thread cavity 6-3-1 in the lower supporting block 6-3 (so that the height can be easily adjusted by only rotating the ball column 6-1, the levelness of the underframe is detected by matching with a level gauge, the underframe can be quickly leveled, the danger of equipment caused by errors generated by foundation settlement is avoided, and the integral anti-inclination capability of the tower crane is improved).

The cross-shaped underframe 3 comprises a middle connecting piece 3-1 formed by vertically superposing and fixedly combining an upper connecting section 3-1-1 and a diagonal cross 3-1-2 (the middle connecting piece 3-1 is supported and connected with a tower bottom base section 1 through the upper connecting section 3-1-1, the middle connecting piece 3-1 is hinged with four straight beams 3-2 through the diagonal cross 3-1-2 to form a cross-shaped big underframe, the cross-shaped underframe has the advantages of light structure, light dead weight and low manufacturing cost), straight beams 3-2 which are respectively hinged with four ends of the diagonal cross 3-1-2 and extend outwards (the straight beams are hinged with the diagonal cross 3-1-2 to form the cross-shaped big underframe and can be quickly opened or closed according to the needs of work or transportation, the device has the advantages of convenient transition, convenient assembly and disassembly, convenient transportation, simple operation and convenient use), and is hinged with two horizontal long support rods 3-3 (the horizontal long support rods surround two adjacent straight beams to form a stable triangular support so that the straight beams and the short beams in the diagonal cross are fixed into a straight line, the lateral stability of the straight beams is increased, and the load in the horizontal direction is transferred) which are supported at the far ends of four straight beams 3-2 and are combined with the four straight beams 3-2 to form two opposite triangles, and four horizontal short support rods 3-4 (the rigidity of the triangular support is increased and the load in the horizontal direction is transferred) which are supported at the four near ends of the diagonal cross 3-1-2 and the middle parts of the horizontal long support rods 3-3 at the corresponding sides; the cross section of the upper connecting section 3-1-1 is the same as that of the tower bottom foundation section 1 (when the tower crane is supported by the wind power hoisting device, the tower bottom foundation section 1 is directly lapped on the upper connecting section 3-1-1, and then the tower body standard section is lapped above the tower bottom foundation section 1, so that the operation is simple and the use is convenient).

The upper ends of four inclined supports 2 are respectively hinged to the upper parts of four chords of a tower bottom foundation section 1, and the lower ends of the four inclined supports 2 are respectively hinged to the top surfaces of the far ends of four linear beams 3-2 (the inclined supports are connected to the chords of the tower bottom foundation section 1 and the linear beams to form a right-angle large triangular support frame to bear the load of the upper part of a tower crane, so that the stress condition of the traditional main support with the cross section of the tower bottom foundation section is greatly improved, and the tower bottom foundation section is reasonable in stress, simple in structure, light in dead weight, economical and practical.

The support 4 is a quadrangular frustum pyramid structure consisting of a lower bottom plate 4-1, an upper bottom plate 4-2, a vertical rib plate 4-3 and a sealing plate 4-4 (the frustum pyramid structure with a large lower part and a small upper part is convenient for uniformly and dispersedly transferring the upper load to the lower support leg); the lower bottom plate 4-1 extends outwards beyond the lower edge of the sealing plate 4-4 (so that the lower bottom plate can be quickly pressed by the pressing block); the center of the upper bottom plate 4-2 is provided with an internal thread matched with the external thread section 6-1-2 of the ball column 6-1 and matched with the internal thread cavity 6-3-1 in the lower block 6-3 (ensuring that the ball column 6-1 is smoothly rotated for height adjustment).

The base distance wide-surface supporting legs 5 are of a cuboid box-shaped structure (load is conveniently and uniformly transferred to the ground), and positioning strips 5-1 and pressing blocks 5-2 are arranged on the base distance wide-surface supporting legs 5 (the positioning strips 5-1 are convenient for quickly positioning the lower bottom plate, and the pressing blocks 5-2 are used for quickly pressing the lower bottom plate); the area of the bottom surface of the foundation distance broad-face supporting leg 5 is not less than 16 square meters (compared with the traditional foundation distance below 12 square meters and a tower body pre-embedded base structure, the grounding pressure of the foundation distance broad-face supporting leg 5 is greatly reduced, so that the geological foundation can be simply treated, and the foundation distance broad-face supporting leg is suitable for all terrains.

The specific use cases of the invention are as follows:

when the invention is transported to a construction site, the invention is firstly assembled according to the structural description: firstly, arranging four sets of fast positioning and pressing integrated support seats 4 and base distance broadside supporting legs 5 at corresponding positions on the ground; next, the lower support block 6-3 is fixed to the top surface of the upper base plate 4-2 in the support, and the coaxial line of the two is adjusted. Then, screwing the external thread section 6-1-2 of the sphere column 6-1 into the internal thread cavity 6-3-1 of the lower support block 6-3, and reversely buckling the upper support block 6-2 on the hemisphere structure 6-1-1 of the sphere column 6-1; then, the intermediate connecting member 3-1 is placed on the ground at the center; then horizontally rotating the two groups of folded linear beams 3-2 along the hinged ends of the diagonal crosses 3-1-2 to open, namely rotating until the linear beams 3-2 and the corresponding short beams in the diagonal crosses 3-1-2 are positioned on the same straight line, hoisting the middle connecting piece 3-1 and the four linear beams 3-2 to be right above the support 4, and fixedly welding the upper support block 6-2 on the corresponding position of the lower bottom surface of the far end of the linear beam 3-2 after the adjustment is in place; then, two long horizontal support rods 3-3 are hinged and supported between the far ends of the four straight beams 3-2 to form two opposite-vertex triangles, and two short horizontal support rods 3-4 are hinged between the middle part of each long horizontal support rod 3-3 and two near-end ends of the diagonal cross 3-1-2; then, butting the tower bottom base section 1 on the top of the upper connecting section 3-1-1 of the middle connecting piece 3-1; and finally, respectively hinging four inclined supports 2 between the top surfaces of the far ends of the four straight beams 3-2 and the upper parts of the chord members of the tower bottom base section on the corresponding side of the tower bottom base section 1. Thus, the present invention is quickly assembled. When the tower crane is used for supporting the wind power hoisting tower crane, the tower bottom foundation section 1 is directly lapped on the upper connecting section 3-1-1, and then the tower body standard section is lapped above the tower bottom foundation section 1, so that the operation is simple and the use is convenient.

After the project construction is finished in this stage, when the wind power hoisting tower crane needs to be transferred for recycling, the tower body standard section and the tower bottom foundation section 1 with the same section at the upper part are firstly dismantled, and then the invention is quickly dismantled and transported: the method is characterized in that four inclined supports 2 are firstly disassembled, then a tower bottom foundation section 1 is disassembled, then horizontal short support rods 3-4 and horizontal long support rods 3-3 are disassembled, four straight beams 3-2 hinged with diagonal crosses 3-1-2 are divided into two groups to be horizontally rotated and folded and then integrally transported, a rotating ball column 6-1 is separated from a lower support block 6-3, and a press block 5-2 is unscrewed to separate a support 4 and a support leg 5, so that the method is quickly disassembled and can be transported and transferred.

Claims (6)

1. The utility model provides a wind-powered electricity generation hoist and mount tower machine truss-like chassis suitable for all-terrain weak earth pressure resists slope, including supporting truss-like cross chassis (3) below basic festival (1) bottom at the bottom of the tower, both ends articulate four bearing diagonal (2) at basic festival upper portion and cross chassis top surface at the bottom of the tower respectively, support four group's supports (4) and base distance broad face landing leg (5) of four distal ends belows in cross chassis (3), its characterized in that: each support (4) is combined with the cross-shaped underframe (3) through a height-adjustable spherical hinge assembly (6); the height-adjustable spherical hinge assembly (6) comprises a spherical column (6-1) which is formed by processing a cylinder, the upper part of the spherical column is of a hemispherical structure (6-1-1), the lower part of the spherical column is of an external thread section (6-1-2), an inner cavity is of a hemispherical groove (6-2-1) matched with the hemispherical structure (6-1-1), and is fixed on an upper supporting block (6-2) of the lower bottom surface of the farthest end of the cross-shaped underframe (3), and the inner cavity is of an internal thread cavity (6-3-1) matched with the external thread section (6-1-2) and is fixed on a lower supporting block (6-3) of the top surface of the support (4).

2. The truss type underframe of the wind power hoisting tower crane applicable to all-terrain weak ground pressure resisting inclination according to claim 1, wherein: the length of the external thread section (6-1-2) in the ball column (6-1) is greater than that of the internal thread cavity (6-3-1) in the lower supporting block (6-3).

3. The truss type underframe of the wind power hoisting tower crane applicable to all-terrain weak ground pressure resisting inclination according to claim 1, wherein: the cross-shaped underframe (3) comprises a middle connecting piece (3-1) formed by vertically superposing and fixedly combining an upper connecting section (3-1-1) and a diagonal cross (3-1-2), a straight beam (3-2) which is respectively hinged at four ends of the diagonal cross (3-1-2) and extends outwards, two horizontal long support rods (3-3) which are hinged and supported at the far ends of the four straight beams (3-2) and combined with the four straight beams (3-2) to form two opposite triangles, and four horizontal short support rods (3-4) which are supported at the four near ends of the diagonal cross (3-1-2) and the middle parts of the horizontal long support rods (3-3) at the corresponding sides; the cross section of the upper connecting section (3-1-1) is the same as that of the tower bottom base section (1).

4. The truss type underframe of the wind power hoisting tower crane applicable to all-terrain weak ground pressure resisting inclination according to claim 1, wherein: the upper ends of the four inclined supports (2) are respectively hinged to the upper parts of the four chord members of the tower bottom foundation section (1), and the lower ends of the four inclined supports (2) are respectively hinged to the top surfaces of the far ends of the four straight beams (3-2).

5. The truss type underframe of the wind power hoisting tower crane applicable to all-terrain weak ground pressure resisting inclination according to claim 1, wherein: the support (4) is of a quadrangular frustum pyramid structure consisting of a lower bottom plate (4-1), an upper bottom plate (4-2), a vertical rib plate (4-3) and a sealing plate (4-4); the lower bottom plate (4-1) extends outwards beyond the lower edge of the sealing plate (4-4); the center of the upper bottom plate (4-2) is provided with an internal thread matched with the external thread section (6-1-2) of the ball column (6-1) and matched with the internal thread cavity (6-3-1) in the lower support block (6-3).

6. The truss type underframe of the wind power hoisting tower crane applicable to all-terrain weak ground pressure resisting inclination according to claim 1, wherein: the base distance wide-surface supporting legs (5) are of a cuboid box-shaped structure, and positioning strips (5-1) and pressing blocks (5-2) are arranged on the base distance wide-surface supporting legs (5); the area of the bottom surface of the base distance broadside supporting leg (5) is not less than 16 square meters.

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