A rotary drilling rig capable of automatically loading and unloading a casing

Abstract

The application discloses a rotary drilling rig capable of automatically loading and unloading a casing pipe, comprising a chassis, a rotary table and a working box, a winch machine for driving a steel wire rope to contract and wind is installed in the working box, opening and closing mechanisms are installed at upper and lower positions on left and right sides of the front side of the working box, the left two opening and closing mechanisms and the right two opening and closing mechanisms are symmetrically arranged, the left two opening and closing mechanisms and the right two opening and closing mechanisms are both provided with lifting mechanisms through two fixing blocks, casing pipe clamping arms are symmetrically installed on the inner sides of the two lifting mechanisms, and the casing pipe is clamped and moved through the two casing pipe clamping arms; installation grooves are formed in the inner sides of the two casing pipe clamping arms, and flexible fixing plates are installed in the two installation grooves; the casing pipe clamping arms are installed through the opening and closing mechanisms and the lifting mechanisms, the casing pipe is automatically clamped and lifted up during rotary drilling, the casing pipe is automatically installed in a pile hole and the casing pipe is automatically pulled out from the pile hole, the purpose of achieving the automatic loading and unloading of the casing pipe in the pile hole is achieved, the structure is simple, and the loading and unloading in the pile hole can be realized synchronously with a drill rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the mechanical technical field, specifically to a rotary drilling rig capable of automatically loading and unloading sleeve pipes. BACKGROUND

[0002] The rotary drilling rig is also known as a rotary drilling rig or a pile driver. The rotary drilling rig is a comprehensive drilling machine that can use various substrates and has the characteristics of fast hole forming speed, less pollution, and strong mobility. The short auger bit performs dry excavation operation, and the rotary bit performs wet excavation operation under the condition of mud wall protection. The rotary drilling rig can cooperate with a percussion hammer to break hard strata and then perform hole excavation operation. If the rotary drilling rig cooperates with an enlarged head drill, it can perform hole enlarging operation at the bottom of the hole. The rotary drilling rig uses a multi-layer telescopic drill rod, has less auxiliary drilling time, low labor intensity, does not need mud circulation and slag discharge, saves cost, and is particularly suitable for foundation construction of urban construction.

[0003] The rotary drilling rig used in the prior art needs to first place a sleeve pipe at the pile hole position before and after drilling to protect the pile hole and block silt, so as to avoid the collapse of the mud in the hole and affect the pile hole. However, the conventional rotary drilling rig can only install and dismount the sleeve pipe by using a crane for separate operation, which increases the equipment cost and reduces the efficiency of drilling the pile hole.

[0004] The patent with the application number CN202020368582.X discloses a steel wire rope protection device for a rotary drilling rig. The device includes two parallel straight linear guides, a tension pulley device slidingly connected between the straight linear guides, an adjusting nut connected to one side of the tension pulley device and the straight linear guide, a compression spring arranged between the tension pulley device and the adjusting nut, a limiting fixed block arranged on the other side of the tension pulley device and the straight linear guide, and a mounting seat connected to one end of the two straight linear guides and fixedly connected to a mast of the rotary drilling rig. The device is arranged on the mast above the drill rod, so that the steel wire rope is always under a certain tension provided by the compression spring to maintain a straight state. The steel wire rope is coaxial with the center line of the drill rod through the guiding action of the right tension pulley below, so that the steel wire rope is in a straight state and at the center of the drill rod, thereby reducing the swing of the steel wire rope and the possibility of collision or friction between the steel wire rope and the inner wall of the drill rod, and prolonging the service life of the steel wire rope.

[0005] The above patent realizes the rotary drilling rig, but the loading and unloading of the sleeve pipe need to be performed by using a separate device, which increases the equipment cost and the operation time of the separate device, and reduces the construction efficiency. SUMMARY

[0006] To solve the above problems, the present application provides the following technical solutions:

[0007] The utility model provides an automatic casing loading and unloading rotary drilling rig, including chassis, slewing table and work tank, the work tank is movably installed above the chassis through the slewing table, the work tank is installed with the winch that drives the wire rope contraction and winding in, the mast is movably connected in the middle lower side of the front side of work tank, the first hydraulic cylinder is movably installed in the middle of the top of work tank, the mast rear side middle section is movably connected in the telescopic end of first hydraulic cylinder, the wire rope is connected to the drill pipe through winding wheel mechanism around the mast, the drill pipe lower end is movably installed with drill bit, the opening and closing mechanism is installed in the upper and lower positions of the left and right sides of the front side of work tank, left two opening and closing mechanisms and right two opening and closing mechanisms are symmetrically arranged, left two opening and closing mechanisms and right two opening and closing mechanisms are movably installed with lifting mechanism through two fixed blocks, the casing is clamped and moved through two casing clamp arms,

[0008] Two casing clamp arms are movably connected with flexible fixing plate in the installation groove, and the flexible fixing plate comprises a plurality of fixed strips and a plurality of connecting lines, the front and back sides of the fixed strips are arranged in parallel, and the front and back sides of the connecting lines are fixedly connected to the front and back sides of the installation groove.

[0009] Preferably, the front and back sides of the fixed strips are in close contact, and the fixed strips are anti-slip rubber strips.

[0010] Preferably, the drill bit is a three-pronged pyramid drill, and the drill tip faces downward.

[0011] Preferably, the four opening and closing mechanisms each comprise a sliding seat, a sliding column, a second hydraulic cylinder, a connecting block, and a connecting column, the sliding seat is fixed to the front side of the work tank, the sliding seat is provided with a sliding groove on the front side, the sliding column is fitted in the sliding groove, the connecting column is fixedly installed on the outer end face of the sliding column, the second hydraulic cylinder is fixed above the sliding seat, the telescopic end of the second hydraulic cylinder is connected to the connecting column through the connecting block, the lifting mechanism on one side is installed on the front side of the sliding column through two fixed blocks, and the lifting mechanisms on both sides are driven inwardly closed and outwardly expanded by the second hydraulic cylinder.

[0012] Preferably, the two lifting mechanisms each comprise a motor-driven track belt transmission belt, the casing clamp arms are fixedly connected to the inner side of the track belt transmission belt, and the track belt transmission belts drive the casing clamp arms to ascend and descend through the motor.

[0013] Preferably, the connecting lines are at least 3.

[0014] Preferably, stroke switches are installed on the outer sides of the two track belts, and the two stroke switches cooperate with the track belts to control the lifting amount.

[0015] Preferably, the flexible filling layer is a high-density sponge layer.

[0016] Preferably, the winding wheel mechanism includes at least two winding wheels.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. The present application installs opening and closing mechanisms and lifting mechanisms on both sides of the mast of the rotary drilling machine, installs sleeve clamping arms through the opening and closing mechanisms and the lifting mechanisms to realize automatic clamping and lifting of the sleeve during rotary drilling, thereby achieving the purpose of automatically installing and dismounting the sleeve in the pile hole, and the structure is simple and can be synchronized with the drill rod to realize installation and dismounting in the pile hole.

[0019] 2. The present application sets up flexible fixing plates on the two sleeve clamping arms, and the flexible fixing plates are composed of a plurality of fixing strips connected by at least three connecting lines, which are suitable for clamping and fixing sleeves with different outer diameters. When the fixing strips connected by the connecting lines contact the sleeve, the flexible filling layer made of high-density sponge with elasticity can directly form bending in different interval ranges according to the diameter of the sleeve, and the remaining positions are supported by the elastic filling layer, which increases the wrapping surface on the outer side of the sleeve and achieves good anti-skid and clamping effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure is a structural schematic diagram of the embodiment of the present application.

[0021] Figure 2 The figure is a structural schematic diagram of the sleeve clamping and lifting of the embodiment of the present application.

[0022] Figure 3 The figure is a structural schematic diagram of the sleeve clamping state of the embodiment of the present application.

[0023] Figure 4 The figure is a structural schematic diagram of the flexible fixing plate of the embodiment of the present application.

[0024] The embodiment of the present application mainly includes the following element symbols:

[0025] Chassis-1, rotary table-11, working box-12, first hydraulic cylinder-13, mast-2, winding wheel mechanism-21, steel wire rope-22, drill rod-3, drill bit-31, opening and closing mechanism-4, sliding seat-41, sliding groove-42, sliding column-43, second hydraulic cylinder-44, connecting column-45, connecting block-46, fixed block-5, lifting mechanism-6, track drive belt-61, travel switch-62, casing clamp arm-7, mounting groove-71, flexible fixing plate-72, fixed strip-73, connecting line-74, flexible filling layer-75. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Embodiment one

[0028] As shown in Figure 1 and Figure 2 , an automatic casing loading and unloading rotary drilling rig, comprising a chassis 1, a rotary table 11 and a working box 12, the working box 12 is movably installed above the chassis 1 through the rotary table 11, a winch with a steel wire rope 22 winding contraction is installed in the working box 12, a mast 2 is movably hinged to the front middle lower side of the working box 12, a first hydraulic cylinder 13 is hingedly installed above the middle of the working box 12, the rear middle section of the mast 2 is hingedly connected to the telescopic end of the first hydraulic cylinder 13, the steel wire rope 22 is wound around the mast 2 through the winding wheel mechanism 21, the steel wire rope 22 is connected to the drill rod 3 after winding around the winding wheel mechanism 21 from the winch of the working box 12, the drill bit 31 is movably installed at the lower end of the drill rod 3, the opening and closing mechanism 4 is installed at the upper and lower positions of the left and right sides of the front side of the working box 12, the left two opening and closing mechanisms 4 and the right two opening and closing mechanisms 4 are symmetrically arranged, the lifting mechanism 6 is installed through two fixed blocks 5 on the left two opening and closing mechanisms 4 and the right two opening and closing mechanisms 4 respectively, the casing is clamped and moved by the casing clamp arm 7 symmetrically installed inside the two lifting mechanisms 6;

[0029] As shown in Figure 3 and Figure 4As shown, two said sleeve clamp arms 7 are provided with mounting grooves 71 on the inner side, two flexible fixing plates 72 are installed in the two mounting grooves 71, the two flexible fixing plates 72 each include a plurality of fixing strips 73 and a plurality of connecting lines 74, the plurality of fixing strips 73 are arranged side by side on the front and back sides, the plurality of connecting lines 74 are fixedly connected to the front and back sides in the mounting grooves 71 by penetrating the front and back sides of the plurality of fixing strips 73, and the two flexible fixing plates 72 are further provided with a flexible filling layer 75 in the mounting grooves 71.

[0030] The flexible fixing plate 72 is arranged on the two sleeve clamp arms 7, the plurality of fixing strips 73 connected by at least three connecting lines 74 form the flexible fixing plate 72, the sleeve clamp arms 7 are adapted to the gripping and fixing of the sleeves with different outer diameters, when the flexible fixing plate 75 made of the high-density sponge with elasticity contacts the sleeve, the sleeve diameter size can be directly used to form the bending in different interval ranges, the remaining positions are supported by the elasticity of the flexible filling layer 75, the outer side of the sleeve is increased to form the wrapping surface, and better anti-skid and clamping effects are achieved.

[0031] The plurality of fixing strips 73 are in close contact on the front and back sides, and the plurality of fixing strips 73 are anti-skid rubber strips; the drill bit 31 is a three-prism drill with the drill tip downward, and the three-prism drill increases the drill blade when the drill pile hole is drilled, and the drilling efficiency is higher than that of the previous cylindrical drill bit 31.

[0032] The four opening and closing mechanisms 4 each include a sliding seat 41, a sliding column 53, a second hydraulic cylinder 44, a connecting block 46 and a connecting column 45, the sliding seat 41 is fixed on the front side of the working box 12, the sliding seat 41 is provided with a sliding groove 42 on the front side, the sliding column 53 is fitted in the sliding groove 42, the connecting column 45 is fixedly installed on the outer end face of the sliding column 53, the second hydraulic cylinder 44 is fixed above the sliding seat 41, the telescopic end of the second hydraulic cylinder 44 is outwardly connected to the connecting column 45 through the connecting block 46, and the unilateral lifting mechanism 6 is installed on the front side of the upper and lower sliding columns 53 through the two fixing blocks 5, and the two lifting mechanisms 6 are driven inwardly closed and outwardly expanded by the second hydraulic cylinder 44.

[0033] The two lifting mechanisms 6 each include a motor-driven track belt 61, and the two sleeve clamp arms 7 are fixedly connected to the inner side of the track belt 61, and the two track belts 61 drive the sleeve clamp arms 7 to ascend and descend by the motor drive.

[0034] The opening and closing mechanism 4 and the lifting mechanism 6 are installed on both sides of the rotary drilling machine, the sleeve clamp arm 7 is installed on the opening and closing mechanism 4 and the lifting mechanism 6 to realize the automatic clamping and upward lifting of the sleeve during the rotary drilling, so that the sleeve is automatically installed and disassembled in the pile hole, the structure is simple, and the sleeve can be installed and disassembled in the pile hole synchronously with the drill rod 3.

[0035] The number of the connection lines 74 is at least three.

[0036] Two stroke switches 61 are installed outside the track drive belts 61, and the two stroke switches 61 control the lifting amount of the track drive belts 61, so that the lifting amount can be automatically controlled according to the length of the sleeve, and the sleeve can quickly reach the required depth size when being lifted for loading and unloading.

[0037] The flexible filling layer 75 is a high-density sponge layer.

[0038] The winding wheel mechanism 21 includes at least two winding wheels.

[0039] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A rotary excavator capable of automatically loading and unloading a casing pipe, comprising a chassis, a slewing platform and a working box, the working box being movably mounted above the chassis by the slewing platform, a winch capable of winding and unwinding a steel wire rope being installed in the working box, characterized in that: A mast is hinged to the lower center of the front side of the work box. A first hydraulic cylinder is hinged to the upper center of the work box. The middle rear section of the mast is hinged to the telescopic end of the first hydraulic cylinder. A wire rope is wound around the mast via a winding wheel mechanism. The wire rope extends from the winch of the work box, passes through the winding wheel mechanism, and connects to the drill rod. A drill bit is movably mounted on the lower end of the drill rod. Opening and closing mechanisms are installed along the upper and lower edges of the left and right sides of the front of the work box. The two opening and closing mechanisms on the left and the two on the right are symmetrically arranged. Each of the two opening and closing mechanisms and the two opening and closing mechanisms on the right side is equipped with a lifting mechanism via two fixed blocks. A sleeve clamping arm is symmetrically installed on the inner side of each of the two lifting mechanisms, allowing the sleeve to be gripped and moved. Each of the two sleeve clamping arms has an installation groove on its inner side, within which a flexible fixing plate is installed. Each flexible fixing plate includes several fixing strips and several connecting lines. The fixing strips are arranged side-by-side on both the front and rear sides, and the connecting lines pass through the front and rear sides of the fixing strips and are fixedly connected to the installation groove. On both the front and rear sides, the two flexible fixing plates and the mounting grooves are also provided with flexible filling layers. Both lifting mechanisms include motor-driven track transmission belts. The two sleeve clamping arms are fixedly connected to the inner side of the track transmission belts. The two track transmission belts drive the sleeve clamping arms to rise and fall through the motor. There are at least three connecting lines. Limit switches are installed on the outer side of the two track transmission belts. The two limit switches work with the track transmission belts to control the lifting amount. The flexible filling layer is a high-density sponge layer. The four opening and closing mechanisms each include a slide block, a slide column, a second hydraulic cylinder, a connecting block, and a connecting column. The slide block is fixed on the front side of the working box. The front side of the slide block has left and right sliding grooves. The slide column is installed in the sliding grooves. The connecting column is fixedly installed on the outer end face of the slide column. The second hydraulic cylinder is fixed above the slide block. The telescopic end of the second hydraulic cylinder is connected to the connecting column through the connecting block. The lifting mechanism on one side is installed on the front side of the upper and lower slide columns through two fixing blocks. The two lifting mechanisms are driven by the second hydraulic cylinder to close inward and unfold outward.

2. The automatic casing loading and unloading rotary drilling rig according to claim 1, characterized in that: The front and rear sides of several of the fixing strips are in close contact, and several of the fixing strips are anti-slip rubber strips.

3. The auto-hoisting casing rotary drilling rig of claim 2, wherein: The drill bit is a triangular pyramidal drill with the drill tip pointing downwards.

4. The auto-hoisting casing rotary drilling rig of claim 3, wherein: The winding wheel mechanism includes at least two winding wheels.

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