CN213039237U

CN213039237U - Low-clearance goose head for rotary drilling rig

Info

Publication number: CN213039237U
Application number: CN202020905801.3U
Authority: CN
Inventors: 贺广迎; 李小敏; 李祥康; 任城钰
Original assignee: Xuzhou Reman Construction Machinery Technology Co Ltd
Current assignee: Xuzhou Reman Construction Machinery Technology Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-04-23
Anticipated expiration: 2030-05-26

Abstract

A low clearance gooseneck boom for a rotary drilling rig is characterized in that a main winding head sheave bracket and an auxiliary winding head sheave bracket are both vertically arranged and are both fixedly connected to the upper surface of a gooseneck boom flange plate; main hoisting sheave support: the pair of main winding head sheaves are respectively and rotatably connected to the left part and the right part between the pair of vertical plates A through a main winding head sheave pin at the center; the pair of connecting plates A are respectively and fixedly connected between the left end and the right end of the pair of vertical plates A; the pair of outer stop pins A and the pair of upper stop pins A are respectively connected between the left end and the right end of the pair of vertical plates A; the auxiliary winding head sheave bracket: the pair of auxiliary winding head sheaves are respectively and rotatably connected to the left part and the right part between the pair of vertical plates B through an auxiliary winding head sheave pin at the center; the pair of connecting plates B are respectively and fixedly connected between the left end and the right end of the pair of vertical plates B; the pair of outer stop pins B and the pair of upper stop pins B are respectively connected between the left end and the right end of the pair of vertical plates B. The goose head is reasonable in structure and can be favorable for expanding different diameters of the same main machine on the premise of not replacing the whole goose head assembly.

Description

Low-clearance goose head for rotary drilling rig

Technical Field

The utility model relates to a dig rig soon and use low headroom goose head belongs to and digs rig accessory technical field soon.

Background

In the construction of the foundation pile, the gooseneck boom is used as an important component in a drilling machine and is installed at the top end of a mast of the drilling machine, and when a power head is hoisted and lifted, a steel wire rope is reversed and a multi-time pulley block is carried out to amplify the lifting force. The goose head in the prior art is simple in structure, when the drilling diameter of the same host needs to be expanded, the whole goose head assembly needs to be replaced, the working efficiency is reduced, the labor load of operators is increased, and meanwhile, the cost of the goose head assembly is also increased.

Disclosure of Invention

To the problem that above-mentioned prior art exists, the utility model provides a dig rig soon and use low headroom gooseneck boom head, this gooseneck boom head is rational in infrastructure, and its bearing capacity is strong, simultaneously, can be favorable to realizing the extension of the different diameters of same host computer drilling under the prerequisite of not changing whole gooseneck boom assembly.

In order to achieve the purpose, the utility model provides a low clearance gooseneck boom for a rotary drilling rig, which comprises a main winding head sheave bracket, an auxiliary winding head sheave bracket and a gooseneck boom flange plate;

the main rolling head sheave support and the auxiliary rolling head sheave support are both vertically arranged, the left ends of the main rolling head sheave support and the auxiliary rolling head sheave support are far away from each other, and the right ends of the main rolling head sheave support and the auxiliary rolling head sheave support are close to each other; the two side edges of the main roller sheave bracket and the auxiliary roller sheave bracket are gradually narrowed from the two sides of the upper end to the middle of the lower end, and the lower end edges are fixedly connected to the upper surface of the gooseneck flange plate;

the main winding head sheave bracket comprises a pair of vertical plates A, a pair of main winding head sheaves, a pair of connecting plates A, a pair of outer stop pins A and a pair of upper stop pins A; the pair of vertical plates A are arranged at intervals from front to back; the pair of main hoisting wheels are respectively and rotatably connected to the left part and the right part between the pair of vertical plates A through main hoisting wheel pins arranged at the centers of the main hoisting wheels; the pair of connecting plates A are respectively and fixedly connected between the left end and the right end of the pair of vertical plates A and are positioned on the outer sides of the pair of main hoisting sheaves; the pair of outer stop pins A are respectively connected between the left end and the right end of the pair of vertical plates A, and are positioned on the outer sides of the pair of main hoisting sheaves and on the inner sides of the pair of connecting plates A; the pair of upper stop pins A are respectively connected between the left part and the right part of the pair of vertical plates A and are respectively positioned above the pair of main hoisting sheaves;

the auxiliary winding head sheave bracket comprises a pair of vertical plates B, a pair of auxiliary winding head sheaves, a pair of connecting plates B, a pair of outer stop pins B and a pair of upper stop pins B; the pair of vertical plates B are arranged at intervals from front to back; the pair of auxiliary winding head sheaves are respectively and rotatably connected to the left part and the right part between the pair of vertical plates B through auxiliary winding head sheave pins arranged at the centers of the auxiliary winding head sheaves; the pair of connecting plates B are respectively and fixedly connected between the left end and the right end of the pair of vertical plates B and are positioned on the outer sides of the pair of auxiliary winding head sheaves; the pair of outer stop pins B are respectively connected between the left end and the right end of the pair of vertical plates B, and are positioned on the outer sides of the pair of auxiliary hoisting sheaves and on the inner sides of the pair of connecting plates B; the pair of upper stop pins B are respectively connected between the left part and the right part of the pair of vertical plates B and are respectively positioned above the pair of auxiliary hoisting sheaves.

Furthermore, in order to realize the quick switching between the installation state and the transportation state, the device also comprises an upper mast and a transportation positioning plate, wherein the upper end of the upper mast is fixedly connected with a mast flange plate, and the mast flange plate is fixedly connected with a gooseneck flange plate through a plurality of connecting bolts arranged in the circumferential direction; the opposite surface of the right side of the upper mast is a vertical plane, the upper part of the right side of the upper mast is fixedly connected with a pair of connecting lug plates, the pair of connecting lug plates are respectively positioned at the front side and the rear side of the main hoisting sheave bracket, and the upper parts of the pair of connecting lug plates are correspondingly provided with pin shaft bearing grooves; the upper part of the right side of the upper mast is provided with an extension part which extends downwards, the part of the extension part, which is close to the pin bearing groove, is rotatably connected with a goose head pin shaft, and the parts of the goose head pin shaft, which are positioned at the front side and the rear side of the main roller head bracket, are respectively positioned in the pair of pin bearing grooves; the transportation locating plate sets up with low slope about, and is located the below of goose head round pin axle, and transportation locating plate fixed connection is on the left of the lower extreme of extension. The mast flange plate is fixedly connected with the gooseneck flange plate through a plurality of connecting bolts arranged in the circumferential direction, so that the main winding head sheave bracket and the auxiliary winding head sheave bracket can be kept right above the gooseneck flange plate in the installation state, and the mast flange plate can be ensured to be in a working state; the gooseneck pin shaft is arranged at the lower part of the main winding head sheave bracket and is matched with the pin shaft bearing grooves on the pair of connecting lug plates on the right side of the upper mast, so that when the mast flange plate is separated from the gooseneck flange plate, the main winding head sheave bracket, the auxiliary winding head sheave bracket and the gooseneck flange plate are integrally rotated relative to the upper mast, and the transportation positioning plate can be abutted to the right end surface of the upper mast, so that the gooseneck can be quickly converted into a transportation state, and the positioning in the transportation process is facilitated.

Preferably, the size of the main roller sheave bracket is larger than that of the auxiliary roller sheave bracket, the left side edge of the main roller sheave bracket is positioned on the left side of the left side edge of the auxiliary roller sheave bracket, and the right side edge of the main roller sheave bracket is positioned on the right side of the right side edge of the auxiliary roller sheave bracket.

Further, in order to increase the overall connection strength, the main winding head sheave bracket further comprises an annular rib plate A, a pair of arc rib plates A, an upper rib plate A, a left lower rib plate A, a right lower rib plate A and an extension rib plate A, wherein the annular rib plate A is fixedly connected between the middle parts of the pair of vertical plates A, the arc rib plates A, the upper rib plate A, the left lower rib plate A, the right lower rib plate A and the extension rib plate A are respectively positioned at the outer sides of the annular rib plates A, the pair of arc rib plates A are respectively fixedly connected between the left part and the right part of the pair of vertical plates A, the pair of arc rib plates A are respectively positioned at the inner sides of the pair of main winding head sheaves, and arc openings are respectively arranged towards the pair of; the upper rib plate A is fixedly connected between the upper ends of the pair of vertical plates A, and the left end and the right end of the upper rib plate A are respectively and fixedly connected with the upper ends of the pair of arc rib plates A; the left lower rib plate A is fixedly connected between the lower parts of the left side end edges of the pair of vertical plates A, and the left end of the left lower rib plate A is fixedly connected with the lower end of the left arc rib plate A; the right lower rib plate A is fixedly connected between the lower parts of the right side end edges of the pair of vertical plates A, and the right end of the right lower rib plate A is fixedly connected with the lower end of the right arc rib plate A; the extension part rib plate A is fixedly connected between the extension parts of the pair of vertical plates A;

the auxiliary winding head sheave support further comprises an annular rib plate B, a pair of arc rib plates B, an upper rib plate B, a left lower rib plate B and a right lower rib plate B, the annular rib plate B is fixedly connected between the middle parts of the pair of vertical plates B, the arc rib plates B, the upper rib plate B, the left lower rib plate B and the right lower rib plate B are respectively positioned at the outer sides of the annular rib plates B, the pair of arc rib plates B are respectively and fixedly connected between the left part and the right part of the pair of vertical plates B, the pair of arc rib plates B are respectively positioned at the inner sides of the pair of auxiliary winding head sheave supports, and arc openings are respectively arranged towards the pair of auxiliary winding; the upper rib plate B is fixedly connected between the upper ends of the pair of vertical plates B, and the left end and the right end of the upper rib plate B are respectively and fixedly connected with the upper ends of the pair of arc rib plates B; the left lower rib plate B is fixedly connected between the lower parts of the left side end edges of the pair of vertical plates B, and the left end of the left lower rib plate B is fixedly connected with the lower end of the left arc rib plate B; the right lower rib plate B is fixedly connected between the lower parts of the right side end edges of the pair of vertical plates B, and the right end of the right lower rib plate B is fixedly connected with the lower end of the right arc rib plate B.

Preferably, the main winding head sheave support is provided with a through hole A which is penetrated through from front to back in the area of the center of the annular rib plate A, and the auxiliary winding head sheave support is provided with a through hole B which is penetrated through from front to back in the area of the center of the annular rib plate B.

Further, in order to increase the overall stability, the steel plate reinforcing device also comprises a reinforcing rib plate A, a reinforcing rib plate B, a reinforcing rib plate C, a reinforcing rib plate E and a reinforcing rib plate F; the reinforcing rib plates A, the reinforcing rib plates B and the reinforcing rib plates C are all arranged on the front side of the main head sheave bracket and are sequentially distributed from left to right, and the reinforcing rib plates A, the reinforcing rib plates B and the reinforcing rib plates C are respectively connected with the gooseneck flange plate and a front side vertical plate A of the main head sheave bracket; the reinforcing rib plates E and F are arranged between the main winding head sheave bracket and the auxiliary winding head sheave bracket and are simultaneously connected with a rear side vertical plate A of the main winding head sheave bracket, a front side vertical plate B of the auxiliary winding head sheave bracket and a gooseneck flange plate.

The utility model discloses in, be close to each other through the one end that makes main roller head support and vice roller head support, the other end is kept away from each other, can provide different supports according to the needs of drilling in different apertures like this to can not need to change whole goose head assembly, reduce the work load of damage personnel, simultaneously, also reduce the cost of goose head. In addition, the situation that the working hours are delayed due to the replacement of the whole goose head can be avoided. Through making and being provided with the transportation locating plate on the main head sheave support of rolling up, and make the main head sheave support of rolling up pass through the bearing recess of round pin axle on goose head round pin axle and a pair of engaging lug board on the upper mast and cooperate, can be convenient for make the goose head assembly carry out the conversion of different states for the upper mast, when operating condition, make goose head flange plate and mast flange plate pass through connecting bolt fixed connection can, when the transport state, break away from connecting bolt, and make the goose head assembly around the rotation of goose head round pin axle to the transportation locating plate butt stop when on the right-hand member face of upper mast can. Through the arrangement of a plurality of rib plates, the integral bearing strength can be effectively increased. Therefore, the goose head has reasonable structure, strong bearing capacity and convenient transportation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic structural view of the main sheave support of the present invention;

FIG. 4 is a schematic structural view of the auxiliary sheave bracket of the present invention;

fig. 5 is a schematic perspective view of the present invention.

In the figure: 1. a main winding head sheave bracket, 2, an auxiliary winding head sheave bracket, 3, a gooseneck flange plate, 4, vertical plates A, 5, a main winding head sheave, 6, connecting plates A, 7, outer stop pins A, 8, upper stop pins A, 9, main winding head sheave pins, 10, vertical plates B, 11, auxiliary winding head sheave, 12, connecting plates B, 13, outer stop pins B, 14, upper stop pins B, 15, auxiliary winding head sheave pins, 16, transportation positioning plates, 17, mast flange plates, 18, connecting lugs, 19, pin bearing grooves, 20, an extension part, 21, a gooseneck head pin shaft, 22, annular rib plates A, 23, arc plates A, 24, upper rib plates A, 25, left lower rib plates A, 26, right lower rib plates A, 27, extension part rib plates A, 28, annular rib plates B, 29, arc plates B, 30, upper rib plates B, 31, left lower rib plates B, 32, right lower rib plates B, 33, through holes A, 34, through holes B, 35, an upper rod, 36. reinforcing rib plates A, 37, reinforcing rib plates B, 38, reinforcing rib plates C, 39, reinforcing rib plates E, 40 and reinforcing rib plate F.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 5, a low clearance gooseneck boom for a rotary drilling rig comprises a main hoisting sheave bracket 1, an auxiliary hoisting sheave bracket 2 and a gooseneck flange plate 3;

the main roller sheave bracket 1 and the auxiliary roller sheave bracket 2 are both vertically arranged, and the left ends of the main roller sheave bracket 1 and the auxiliary roller sheave bracket 2 are far away from each other, and the right ends of the main roller sheave bracket 1 and the auxiliary roller sheave bracket 2 are close to each other; the two side edges of the main roller sheave bracket 1 and the auxiliary roller sheave bracket 2 are gradually narrowed from the two sides of the upper end to the middle of the lower end, and the lower end edges are fixedly connected to the upper surface of the gooseneck flange plate 3;

the main head sheave bracket 1 comprises a pair of vertical plates A4, a pair of main head sheaves 5, a pair of connecting plates A6, a pair of outer stop pins A7 and a pair of upper stop pins A8; the pair of vertical plates A4 are arranged at intervals from front to back; the pair of main hoisting sheave 5 is respectively rotatably connected with the left part and the right part between the pair of vertical plates A4 through main hoisting sheave pins 9 arranged at the respective centers; the pair of connecting plates A6 are respectively and fixedly connected between the left end and the right end of the pair of vertical plates A4 and are positioned at the outer sides of the pair of main hoisting sheaves 5; a pair of outer stop pins A7 are respectively connected between the left end and the right end of the pair of vertical plates A4, and a pair of outer stop pins A7 are positioned at the outer sides of the pair of main hoisting pulleys 5 and at the inner sides of the pair of connecting plates A6; the pair of upper stop pins A8 are respectively connected between the left part and the right part of the pair of vertical plates A4 and are respectively positioned above the pair of main hoisting wheels 5;

the auxiliary sheave bracket 2 comprises a pair of vertical plates B10, a pair of auxiliary sheave 11, a pair of connecting plates B12, a pair of outer stop pins B13 and a pair of upper stop pins B14; the pair of vertical plates B10 are arranged at intervals from front to back; the pair of secondary winding head sheaves 11 are respectively and rotatably connected to the left part and the right part between the pair of vertical plates B10 through secondary winding head sheave pins 15 arranged at the respective centers; the pair of connecting plates B12 are respectively and fixedly connected between the left end and the right end of the pair of vertical plates B10 and are positioned at the outer sides of the pair of auxiliary hoisting sheaves 11; a pair of outer stop pins B13 are respectively connected between the left end and the right end of the pair of vertical plates B10, and a pair of outer stop pins B13 are positioned at the outer sides of the pair of auxiliary hoisting sheaves 11 and at the inner sides of the pair of connecting plates B12; the pair of upper stop pins B14 are respectively connected between the left part and the right part of the pair of vertical plates B10 and are respectively positioned above the pair of auxiliary hoisting wheels 11.

In order to realize the quick switching between the installation state and the transportation state, the device further comprises an upper mast 35 and a transportation positioning plate 16, wherein the upper end of the upper mast 35 is fixedly connected with a mast flange plate 17, and the mast flange plate 17 is fixedly connected with the gooseneck flange plate 3 through a plurality of connecting bolts arranged in the circumferential direction; the right opposite side of the upper mast 35 is a vertical plane, the upper part of the right side of the upper mast is fixedly connected with a pair of connecting lug plates 18, the pair of connecting lug plates 18 are respectively positioned at the front side and the rear side of the main hoisting sheave bracket 1, and the upper parts of the pair of connecting lug plates 18 are correspondingly provided with pin shaft bearing grooves 19; the pair of vertical plates A4 are provided with an extension part 20 extending downwards at the upper part of the right side of the upper mast 35, the extension part 20 is rotatably connected with a gooseneck head pin 21 at the part close to the pin bearing groove 19, and the parts of the gooseneck head pin 21 at the front side and the rear side of the main roller coaster bracket 1 are respectively positioned in the pair of pin bearing grooves 19; the transportation locating plate 16 is obliquely arranged in a left-high-right direction and is located below the goose head pin shaft 21, and the transportation locating plate 16 is fixedly connected to the left side of the lower end of the extension portion 20. The mast flange plate is fixedly connected with the gooseneck flange plate through a plurality of connecting bolts arranged in the circumferential direction, so that the main winding head sheave bracket and the auxiliary winding head sheave bracket can be kept right above the gooseneck flange plate in the installation state, and the mast flange plate can be ensured to be in a working state; the gooseneck pin shaft is arranged at the lower part of the main winding head sheave bracket and is matched with the pin shaft bearing grooves on the pair of connecting lug plates on the right side of the upper mast, so that when the mast flange plate is separated from the gooseneck flange plate, the main winding head sheave bracket, the auxiliary winding head sheave bracket and the gooseneck flange plate are integrally rotated relative to the upper mast, and the transportation positioning plate can be abutted to the right end surface of the upper mast, so that the gooseneck can be quickly converted into a transportation state, and the positioning in the transportation process is facilitated.

Preferably, the size of the main roller sheave bracket 1 is larger than that of the auxiliary roller sheave bracket 2, the left side edge of the main roller sheave bracket 1 is positioned on the left side of the left side edge of the auxiliary roller sheave bracket 2, and the right side edge of the main roller sheave bracket 1 is positioned on the right side of the right side edge of the auxiliary roller sheave bracket 2.

In order to increase the integral connection strength, the main winding head sheave bracket 1 further comprises an annular rib plate A22, a pair of arc rib plates A23, an upper rib plate A24, a left lower rib plate A25, a right lower rib plate A26 and an extension part rib plate A27, wherein the annular rib plate A22 is fixedly connected between the middle parts of the pair of upright plates A4, the arc rib plate A23, the upper rib plate A24, the left lower rib plate A25, the right lower rib plate A26 and the extension part rib plate A27 are respectively positioned at the outer sides of the annular rib plate A22, the pair of arc rib plates A23 is respectively fixedly connected between the left part and the right part of the pair of upright plates A4, the pair of arc rib plates A23 are respectively positioned at the inner sides of the pair of main winding head sheave, and arc openings are respectively arranged; the upper rib plate A24 is fixedly connected between the upper ends of the pair of vertical plates A4, and the left end and the right end of the upper rib plate A24 are respectively and fixedly connected with the upper ends of the pair of arc rib plates A23; the left lower rib plate A25 is fixedly connected between the lower parts of the left side end edges of the pair of vertical plates A4, and the left end of the left lower rib plate A25 is fixedly connected with the lower end of the left arc rib plate A23; the right lower rib plate A26 is fixedly connected between the lower parts of the right side end edges of the pair of vertical plates A4, and the right end of the right lower rib plate A26 is fixedly connected with the lower end of the right arc rib plate A23; the extension part rib plate A27 is fixedly connected between the extension parts of the pair of vertical plates A4;

the auxiliary winding head sheave bracket 2 further comprises an annular rib plate B28, a pair of arc rib plates B29, an upper rib plate B30, a left lower rib plate B31 and a right lower rib plate B32, the annular rib plate B28 is fixedly connected between the middle parts of the pair of vertical plates B10, the arc rib plate B29, the upper rib plate B30, the left lower rib plate B31 and the right lower rib plate B32 are respectively positioned on the outer sides of the annular rib plates B28, the pair of arc rib plates B29 are respectively fixedly connected between the left part and the right part of the pair of vertical plates B10, the pair of arc rib plates B29 are respectively positioned on the inner sides of the pair of auxiliary winding head sheave wheels 11, and arc openings are respectively arranged towards the pair of auxiliary winding head sheave; the upper rib plates B30 are fixedly connected between the upper ends of the pair of vertical plates B10, and the left and right ends of the upper rib plates B30 are fixedly connected with the upper ends of the pair of arc rib plates B29 respectively; the left lower rib plate B31 is fixedly connected between the lower parts of the left side end edges of the pair of vertical plates B10, and the left end of the left lower rib plate B31 is fixedly connected with the lower end of the left arc rib plate B29; the right lower rib plate B32 is fixedly connected between the lower parts of the right side end edges of the pair of vertical plates B10, and the right end of the right lower rib plate B32 is fixedly connected with the lower end of the right arc rib plate B29.

Preferably, the main sheave bracket 1 is provided with a through hole a33 penetrating in the front-rear direction in the central region of the annular rib plate a22, and the auxiliary sheave bracket 2 is provided with a through hole B34 penetrating in the front-rear direction in the central region of the annular rib plate B28.

In order to increase the integral stability, the steel plate also comprises a reinforcing rib plate A36, a reinforcing rib plate B37, a reinforcing rib plate C38, a reinforcing rib plate E39 and a reinforcing rib plate F40; the reinforcing rib plate A36, the reinforcing rib plate B37 and the reinforcing rib plate C38 are all arranged on the front side of the main hoisting sheave bracket 1 and are sequentially distributed from left to right, and the reinforcing rib plate A36, the reinforcing rib plate B37 and the reinforcing rib plate C38 are respectively connected with the gooseneck flange plate 3 and a front side vertical plate A4 of the main hoisting sheave bracket 1; the reinforcing rib plate E39 and the reinforcing rib plate F40 are arranged between the main hoisting sheave bracket 1 and the auxiliary hoisting sheave bracket 2 and are simultaneously connected with a rear side vertical plate A4 of the main hoisting sheave bracket 1, a front side vertical plate B10 of the auxiliary hoisting sheave bracket 2 and the gooseneck flange plate 3.

Through making the main one end of rolling up the head sheave support and rolling up the head sheave support each other closely, the other end is kept away from each other, can provide different supports according to the needs of different aperture drilling like this to can not need to change whole goose head assembly, reduce the work load of doing all harm personnel, simultaneously, also reduce the cost of goose head. In addition, the situation that the working hours are delayed due to the replacement of the whole goose head can be avoided. Through making and being provided with the transportation locating plate on the main head sheave support of rolling up, and make the main head sheave support of rolling up pass through the bearing recess of round pin axle on goose head round pin axle and a pair of engaging lug board on the upper mast and cooperate, can be convenient for make the goose head assembly carry out the conversion of different states for the upper mast, when operating condition, make goose head flange plate and mast flange plate pass through connecting bolt fixed connection can, when the transport state, break away from connecting bolt, and make the goose head assembly around the rotation of goose head round pin axle to the transportation locating plate butt stop when on the right-hand member face of upper mast can. Through the arrangement of a plurality of rib plates, the integral bearing strength can be effectively increased. Therefore, the goose head has reasonable structure, strong bearing capacity and convenient transportation.

Claims

1. A low-clearance goose head for a rotary drilling rig comprises a main hoisting sheave bracket (1), an auxiliary hoisting sheave bracket (2) and a goose head flange plate (3); it is characterized in that;

the main winding head sheave support (1) and the auxiliary winding head sheave support (2) are both vertically arranged, the left ends of the main winding head sheave support (1) and the auxiliary winding head sheave support (2) are far away from each other, and the right ends of the main winding head sheave support and the auxiliary winding head sheave support are close to each other; the two side edges of the main roller sheave bracket (1) and the auxiliary roller sheave bracket (2) are gradually narrowed from the two sides of the upper end to the middle of the lower end, and the lower end edges are fixedly connected to the upper surface of the gooseneck flange plate (3);

the main winding head sheave bracket (1) comprises a pair of vertical plates A (4), a pair of main winding head sheaves (5), a pair of connecting plates A (6), a pair of outer stop pins A (7) and a pair of upper stop pins A (8); the pair of vertical plates A (4) are arranged at intervals from front to back; the pair of main winding head wheels (5) are respectively and rotatably connected to the left part and the right part between the pair of vertical plates A (4) through main winding head wheel pins (9) arranged at the centers of the main winding head wheels; the pair of connecting plates A (6) are respectively and fixedly connected between the left end and the right end of the pair of vertical plates A (4) and positioned on the outer sides of the pair of main hoisting sheaves (5); a pair of outer stop pins A (7) are respectively connected between the left end and the right end of the pair of vertical plates A (4), and the pair of outer stop pins A (7) are positioned on the outer sides of the pair of main hoisting pulleys (5) and on the inner sides of the pair of connecting plates A (6); the pair of upper stop pins A (8) are respectively connected between the left part and the right part of the pair of vertical plates A (4) and are respectively positioned above the pair of main hoisting wheels (5);

the auxiliary winding head sheave bracket (2) comprises a pair of vertical plates B (10), a pair of auxiliary winding head sheaves (11), a pair of connecting plates B (12), a pair of outer stop pins B (13) and a pair of upper stop pins B (14); the pair of vertical plates B (10) are arranged at intervals from front to back; a pair of auxiliary winding head sheaves (11) are respectively and rotatably connected to the left part and the right part between the pair of vertical plates B (10) through auxiliary winding head sheave pins (15) arranged at the respective centers; the pair of connecting plates B (12) are respectively and fixedly connected between the left end and the right end of the pair of vertical plates B (10) and positioned at the outer sides of the pair of auxiliary winding head sheaves (11); a pair of outer stop pins B (13) are respectively connected between the left end and the right end of the pair of vertical plates B (10), and the pair of outer stop pins B (13) are positioned on the outer sides of the pair of auxiliary hoisting wheels (11) and on the inner sides of the pair of connecting plates B (12); the pair of upper stop pins B (14) are respectively connected between the left part and the right part of the pair of vertical plates B (10) and are respectively positioned above the pair of auxiliary hoisting wheels (11).

2. The low-clearance gooseneck boom for the rotary drilling rig is characterized by further comprising an upper mast (35) and a transportation positioning plate (16), wherein a mast flange plate (17) is fixedly connected to the upper end of the upper mast (35), and the mast flange plate (17) is fixedly connected with the gooseneck flange plate (3) through a plurality of circumferentially arranged connecting bolts; the right side opposite surface of the upper mast (35) is a vertical plane, the upper part of the right side of the upper mast is fixedly connected with a pair of connecting lug plates (18), the pair of connecting lug plates (18) are respectively positioned at the front side and the rear side of the main hoisting sheave bracket (1), and the upper parts of the pair of connecting lug plates (18) are correspondingly provided with pin shaft bearing grooves (19); the pair of vertical plates A (4) are provided with downward extending parts (20) at the upper parts of the right sides of the upper masts (35), the parts, close to the pin shaft bearing grooves (19), of the extending parts (20) are rotatably connected with goose head pin shafts (21), and the parts, at the front side and the rear side of the main hoisting sheave bracket (1), of the goose head pin shafts (21) are respectively positioned in the pair of pin shaft bearing grooves (19); the transportation positioning plate (16) is obliquely arranged in a high-left and low-right manner and is positioned below the goose head pin shaft (21), and the transportation positioning plate (16) is fixedly connected to the left side of the lower end of the extension part (20).

3. The low clearance goose head for the rotary drilling rig according to claim 1 or 2, wherein the size of the main hoisting sheave bracket (1) is larger than that of the auxiliary hoisting sheave bracket (2), the left side edge of the main hoisting sheave bracket (1) is positioned on the left side of the left side edge of the auxiliary hoisting sheave bracket (2), and the right side edge of the main hoisting sheave bracket (1) is positioned on the right side of the right side edge of the auxiliary hoisting sheave bracket (2).

4. The low clearance goose head for the rotary drilling rig according to claim 3, the main hoisting sheave bracket (1) also comprises an annular rib plate A (22), a pair of arc rib plates A (23), an upper rib plate A (24), a left lower rib plate A (25), a right lower rib plate A (26) and an extension part rib plate A (27), the annular rib plate A (22) is fixedly connected between the middle parts of the pair of vertical plates A (4), the arc-shaped rib plates A (23), the upper rib plate A (24), the left lower rib plate A (25), the right lower rib plate A (26) and the extension part rib plate A (27) are respectively positioned at the outer sides of the annular rib plates A (22), the pair of arc-shaped rib plates A (23) are respectively and fixedly connected between the left part and the right part of the pair of vertical plates A (4), the pair of arc-shaped rib plates A (23) are respectively positioned at the inner sides of the pair of main winding head pulleys (5), and arc-shaped openings are respectively arranged towards the pair of main winding head pulleys (5); the upper rib plate A (24) is fixedly connected between the upper ends of the pair of vertical plates A (4), and the left end and the right end of the upper rib plate A are respectively fixedly connected with the upper ends of the pair of arc rib plates A (23); the left lower rib plate A (25) is fixedly connected between the lower parts of the left end edges of the pair of vertical plates A (4), and the left end of the left lower rib plate A is fixedly connected with the lower end of the left arc rib plate A (23); the right lower rib plate A (26) is fixedly connected between the lower parts of the right side end edges of the pair of vertical plates A (4), and the right end of the right lower rib plate A is fixedly connected with the lower end of the right arc rib plate A (23); the extension part rib plate A (27) is fixedly connected between the extension parts (20) of the pair of vertical plates A (4);

the auxiliary winding head sheave support (2) further comprises an annular rib plate B (28), a pair of arc rib plates B (29), an upper rib plate B (30), a left lower rib plate B (31) and a right lower rib plate B (32), wherein the annular rib plate B (28) is fixedly connected between the middle parts of the pair of vertical plates B (10), the arc rib plates B (29), the upper rib plate B (30), the left lower rib plate B (31) and the right lower rib plate B (32) are respectively positioned at the outer sides of the annular rib plates B (28), the pair of arc rib plates B (29) are respectively fixedly connected between the left part and the right part of the pair of vertical plates B (10), the pair of arc rib plates B (29) are respectively positioned at the inner sides of the pair of auxiliary winding head sheave (11), and arc openings are respectively arranged towards the pair of auxiliary winding head sheave (11); the upper rib plate B (30) is fixedly connected between the upper ends of the pair of vertical plates B (10), and the left end and the right end of the upper rib plate B are respectively fixedly connected with the upper ends of the pair of arc rib plates B (29); the left lower rib plate B (31) is fixedly connected between the lower parts of the left end edges of the pair of vertical plates B (10), and the left end of the left lower rib plate B is fixedly connected with the lower end of the left arc rib plate B (29); the right lower rib plate B (32) is fixedly connected between the lower parts of the right side end edges of the pair of vertical plates B (10), and the right end of the right lower rib plate B is fixedly connected with the lower end of the right arc rib plate B (29).

5. The low clearance gooseneck boom for the rotary drilling rig according to claim 4, characterized in that the main hoisting sheave bracket (1) is provided with a through hole A (33) which is through from front to back in the area of the center of the annular rib plate A (22), and the auxiliary hoisting sheave bracket (2) is provided with a through hole B (34) which is through from front to back in the area of the center of the annular rib plate B (28).

6. The low-clearance goose head for the rotary drilling rig according to claim 5, further comprising a reinforcing rib plate A (36), a reinforcing rib plate B (37), a reinforcing rib plate C (38), a reinforcing rib plate E (39) and a reinforcing rib plate F (40); the reinforcing rib plates A (36), the reinforcing rib plates B (37) and the reinforcing rib plates C (38) are all arranged on the front side of the main hoisting sheave bracket (1) and are sequentially distributed from left to right, and the reinforcing rib plates A (36), the reinforcing rib plates B (37) and the reinforcing rib plates C (38) are respectively connected with the gooseneck flange plate (3) and a front side vertical plate A (4) of the main hoisting sheave bracket (1); the reinforcing rib plates E (39) and F (40) are arranged between the main winding head sheave bracket (1) and the auxiliary winding head sheave bracket (2) and are simultaneously connected with a rear side vertical plate A (4) of the main winding head sheave bracket (1), a front side vertical plate B (10) of the auxiliary winding head sheave bracket (2) and a gooseneck flange plate (3).