CN110578466A - Disc connection mechanism supported by multi-shaft sleeves, rotary drilling rig and working method - Google Patents

Abstract

The invention discloses a multi-shaft sleeve supported disc connecting mechanism, a rotary drilling rig and a working method, wherein the disc connecting mechanism comprises: the drilling machine comprises a support frame, a drilling mast, a mandrel and a large disc, wherein the support frame is provided with a concave cambered surface downwards, the drilling mast with the top abutting against the concave cambered surface, the mandrel is vertically inserted into the drilling mast, and the large disc is sleeved on the mandrel; the large disc is adapted to, when rotated, drive the drill mast through rotation about the spindle so that the top of the drill mast follows a concave curved surface. At the moment, the swinging motion track of the drilling mast takes the mandrel as a rotating shaft and takes the concave cambered surface as a limiting surface, so that the swinging of the drilling mast in the swinging process can be effectively reduced, and the swinging stability of the drilling mast is improved.

Description

Disc connection mechanism supported by multi-shaft sleeves, rotary drilling rig and working method

technical field

The invention relates to the field of machinery, in particular to a disc connection mechanism supported by multiple shaft sleeves, a rotary drilling rig and their working methods.

Background technique

Rotary drilling rig is a construction machine suitable for hole-forming operations in building foundation engineering. It is mainly suitable for construction in sandy soil, cohesive soil, silty soil and other soil layers. It is widely used in foundation construction such as cast-in-place piles, diaphragm walls, and foundation reinforcement. application. Its working principle is to quickly reach the pile position through the drilling rig's own walking function and mast luffing mechanism, use the mast to guide and lower the drill pipe, and place the cylindrical drill bit with a valve at the bottom to the hole position, and the power head device of the drilling rig To provide torque for the drill pipe, the pressurizing device transmits the pressurized pressure to the drill pipe and the drill bit through the pressurized power head. The drill rod lifts the drill bit out of the hole to unload the soil, so that the cycle is repeated, and the soil is continuously taken and unloaded until the designed hole depth is drilled.

Existing rotary drilling rigs currently on the market generally directly drive the drill mast to rotate through the luffing mechanism to realize its left and right swing. Especially when the drill mast is relatively long and heavy, its swing is unstable, the angle is difficult to control, and the mast guide deviation is easy to occur, resulting in inaccurate lowering position of the drill pipe, thereby affecting the normal use of the rotary drilling rig.

Contents of the invention

The purpose of the present invention is to provide a disc connection mechanism supported by multiple shaft sleeves to improve the swing stability of the drill mast.

The present invention is realized according to the following technical solutions:

The disc connection mechanism supported by multi-axis sleeves includes a support frame, a drill mast, a mandrel and a large disc; the bottom surface of the support frame is set as a concave arc surface, and the top surface of the drill mast is against the concave arc surface Among them, it is used to limit the movement of the drill mast; the mandrel is vertically inserted into the drill mast, and the large disk is covered on the mandrel, and the luffing mechanism drives the large disk to rotate, thereby driving the drill mast to pass through the Rotate around the mandrel, at this time the top of the drill mast touches the concave arc surface and moves along the concave arc surface, and its swing trajectory takes the mandrel as the rotation axis and the concave arc surface as the limiting surface.

Further, a shaft sleeve is provided between the mandrel and the large disk; the shaft sleeve is transition-fitted with the mandrel, and both ends of the shaft sleeve are used to support the mandrel.

Further, the shaft sleeve is fixed inside the large disk through a pin shaft.

Further, a sliding bushing is provided between the mandrel and the drill mast; the sliding bushing is clearance-fitted with the mandrel; and the sliding bushing is interference-fitted with the drill mast.

Further, a large disk pressure plate is provided between the large disk and the drill mast; the inside of the large disk pressure plate is provided with an arc-shaped support surface matching the large disk, which is used to limit the degree of freedom of movement inside and outside the large disk .

Further, the large disc pressure plate is fixed on the drill mast through multiple sets of connecting bolts.

Further, several lubricating places are provided inside the mandrel or on the pressure plate of the large disc to lubricate with grease.

A rotary drilling rig includes a luffing mechanism and the above-mentioned disc connection mechanism supported by multi-shaft sleeves; wherein the luffing mechanism is hinged to the disc connection mechanism to drive the large disc to rotate.

The working method of the disc connection mechanism supported by multi-axis sleeves drives the large disc on the mandrel to rotate through the external mechanism, thereby driving the drill mast to rotate around the mandrel inserted vertically in the drill mast. At this time, the drill mast The top touches the concave arc surface at the bottom of the support frame and moves along the concave arc surface. The swing trajectory takes the mandrel as the rotation axis and the concave arc surface as the limit surface, which can effectively reduce the shaking of the drill mast during the swing process and improve swing stability of the drill mast.

The working method of the rotary drilling rig is that the luffing mechanism of the rotary drilling rig drives the large disk on the mandrel to rotate, thereby driving the drill mast to rotate around the mandrel inserted vertically in the drill mast. At this time, the top of the drill mast touches the It is located on the concave arc surface at the bottom of the support frame and moves along the concave arc surface. The swing trajectory takes the mandrel as the rotation axis and the concave arc surface as the limit surface, which can effectively reduce the shaking of the drill mast during the swing process and improve the drilling efficiency. mast swing stability.

The beneficial effects of the present invention are:

The disk connection mechanism of the present invention drives the large disk to rotate through the luffing mechanism, thereby driving the drill mast to rotate around the mandrel. At this time, the top of the drill mast touches the concave arc surface and moves along the concave arc surface. The mandrel is the rotation axis, and the concave arc surface is used as the limit surface, which can effectively reduce the shaking of the drill mast during the swing process and improve the swing stability of the drill mast.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the front view of disc connection mechanism of the present invention;

Fig. 2 is a side view of the disc connection mechanism of the present invention;

Fig. 3 is A-A sectional view of the present invention;

In the figure: support frame 1, concave arc surface 11, drill mast 2, mandrel 3, bushing 31, large disk 4, sliding bush 5, large disk pressure plate 6, connecting bolt 61, arc support surface 62, Lubrication 7.

Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

Example 1

As shown in Figure 1, Figure 2 and Figure 3, this embodiment 1 provides a disc connection mechanism supported by multi-axis sleeves, including: a support frame 1 with a concave arc surface 11 facing downward, and the top is against the concave arc The drill mast 2 on the surface 11, the mandrel 3 vertically inserted into the drill mast 2 and the large disk 4 that is sheathed on the mandrel 3; , so that the top of the drill mast 2 moves along the concave arc surface 11, that is, the drill mast 2 swings left and right. Specifically, during use, the drill mast is generally arranged vertically, and the mandrel is arranged horizontally on the drill mast.

Optionally, the top of the drill mast 2 is adapted to the concave arc surface.

The disc connection mechanism in Embodiment 1 drives the large disc to rotate through the luffing mechanism, thereby driving the drill mast to rotate around the mandrel. At this time, the top of the drill mast touches the concave arc surface and moves along the concave arc surface, and its swing motion The trajectory takes the mandrel as the rotation axis and the concave arc surface as the limiting surface, which can effectively reduce the shaking of the drill mast during the swing process and improve the swing stability of the drill mast. In addition, during the swinging process of the drill mast, its center of gravity is located on the mandrel, which can reduce the damage to the concave arc surface during the swinging process of the drill mast.

Further, as shown in Fig. 3, a shaft sleeve 31 is provided between the mandrel 3 and the large disc 4; The role of fixed support mandrel. During the working process, there is no rotation between the mandrel and the large disc. The design of the shaft sleeve increases the support strength of the large disc to the mandrel, and reduces the wear of the large disc as the supporting body. As mentioned above, during the swinging process of the drill mast, the mandrel is the rotating shaft and becomes the center of gravity support, and its loss rate will inevitably increase. The mandrel can be easily disassembled through the bushing for replacement or maintenance of the mandrel, which improves the The performance of disc connection mechanism.

Optionally, the bushing 31 is adapted to be fixed inside the large disk 4 through a pin.

An optional embodiment as a sliding bush.

As shown in Fig. 3, a sliding bush 5 is provided between the mandrel 3 and the drill mast 2; the sliding bush 5 is in clearance fit with the mandrel 3; and the sliding bush 5 is in interference fit with the drill mast 2, In order to realize the free rotation of the drill mast during the fine-tuning process, the wear between the mandrel 3 and the drill mast 2 can be effectively reduced, and it is also convenient to replace the mandrel. Specifically, a round hole is provided inside the side of the drill mast for installing the sliding bush.

Optionally, the sliding bush is made of a heat-treated material, such as GCr, and is quenched, which has strong bearing and wear resistance.

Further, as shown in Fig. 1 and Fig. 3, the disc connection mechanism also includes a large disc pressing plate 6 between the large disc 4 and the drill mast 2; The matching arc-shaped supporting surface 62 is adapted to limit the freedom of movement inside and outside of the large disc 4 . The details are as follows: the large disk pressing plate 6 is fixed on the drill mast 2 by connecting bolts 61, and the processing surfaces of the large disk 4 and the left and right sides are embedded in the arc-shaped support surface 62 of the large disk pressing plate 6, so during the rotation process , the degree of freedom of rotation of the large disk 4 will not be restricted, while the degree of freedom of movement inside and outside is limited by the large disk pressing plate 6 .

In the present embodiment 1, several lubricating places 7 are also provided inside the mandrel 3 or on the large disc pressing plate 6 for grease lubrication. The lubricating place includes various forms, such as an oil passage is provided inside the mandrel 3, and an oil injection hole is opened on the surface of the mandrel 3 for the connection between the mandrel and the bushing, and between the mandrel and the sliding bushing. Lubrication between. For another example, an oil filling groove is provided on the large disc pressing plate 6 for lubrication between the large disc and the large disc pressing plate, between the large disc pressing plate and the drill mast.

Example 2

On the basis of Embodiment 1, this Embodiment 2 provides a rotary drilling rig, including: a luffing mechanism and a disc connection mechanism as described above; wherein the luffing mechanism is hinged to the disc connection mechanism, so Drive the big disc to rotate.

For the specific structure and implementation process of the disk connection mechanism, please refer to the relevant discussion of Embodiment 1, and details will not be repeated here.

Example 3

On the basis of embodiment 1, this embodiment 3 provides a working method of the disk connection mechanism, the large disk of the disk connection mechanism is suitable for driving the drill mast to rotate around the mandrel when rotating, so that The top of the drill mast moves along the concave arc surface of the support frame. Wherein the big disc can be driven to rotate by the luffing mechanism.

For the specific structure and implementation process of the disk connection mechanism, please refer to the relevant discussion of Embodiment 1, and details will not be repeated here.

Example 4

On the basis of Embodiments 1 and 2, Embodiment 4 provides a working method of a rotary drilling rig. The luffing mechanism of the rotary drilling rig is suitable for driving the large disk of the disk connection mechanism to rotate.

For the specific structure and implementation process of the disk connection mechanism, please refer to the relevant discussion of Embodiment 1, and details will not be repeated here.

To sum up, the disc connection mechanism, rotary drilling rig, and working method supported by the multi-axis sleeve are based on the disc connection mechanism, that is, the disc connection mechanism drives the large disc to rotate through the tilting cylinder of the luffing mechanism, thereby driving The drill mast rotates around the mandrel. At this time, the top of the drill mast touches the concave arc surface and moves along the concave arc surface. The shaking of the drill mast during the swing process improves the swing stability of the drill mast, and can also reduce the damage of the drill mast to the concave arc surface and increase the service life. Through the shaft sleeve arranged between the mandrel and the big disk, especially when the working loss of the mandrel increases during the swinging process of the drill mast, it is easy to disassemble and assemble the mandrel for replacement or maintenance of the mandrel, which can extend the working life of the mandrel. The service life of the disc connection mechanism. The free rotation of the drill mast during the fine-tuning process can be realized through the sliding bush, which can effectively reduce the wear between the mandrel and the drill mast. Through the lubricating place on the mandrel or the big disc pressure plate, the key matching surfaces of the disc connection mechanism (such as the mandrel and the bushing, the mandrel and the sliding bush, the big disc and the big disc pressure plate, the big disc The mating surfaces of disc pressure plate and drill mast) are lubricated with grease, which can further reduce wear and improve service life.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (10)

1. Disc coupling mechanism that multiaxis cover supported, its characterized in that: comprises a support frame, a drill mast, a mandrel and a large disc;

the bottom surface of the support frame is a concave arc surface, and the top surface of the drill mast is abutted against the concave arc surface to limit the movement of the drill mast;

the spindle is vertically inserted into the drill mast, the large disc is sleeved on the spindle, the large disc is driven to rotate through the amplitude changing mechanism, the drill mast is driven to rotate around the spindle, the top of the drill mast is abutted against the concave arc surface and moves along the concave arc surface, the swing motion track of the drill mast takes the spindle as a rotating shaft, and the concave arc surface as a limiting surface.

2. The multi-axis bushing supported disk coupling of claim 1, wherein: a shaft sleeve is arranged between the mandrel and the large disc; the shaft sleeve is in transition fit with the mandrel, and two ends of the shaft sleeve are used for supporting the mandrel.

3. The multi-axis bushing supported disk coupling of claim 2, wherein: the shaft sleeve is fixed inside the large disc through a pin shaft.

4. The multi-axis bushing supported disk coupling of claim 1, wherein: a sliding bush is arranged between the mandrel and the drill mast; the sliding bush is in clearance fit with the mandrel; the sliding bush is in interference fit with the drill mast.

5. The multi-axis bushing supported disk coupling of claim 1, wherein: a large disc pressing plate is arranged between the large disc and the drill mast; the large disc pressing plate is internally provided with an arc-shaped supporting surface matched with the large disc and used for limiting the moving freedom degree of the inner side and the outer side of the large disc.

6. The multi-axis bushing supported disk coupling of claim 5, wherein: the large disc pressing plate is fixed on the drill mast through a plurality of groups of connecting bolts.

7. the multi-axis bushing supported disk coupling of claim 5, wherein: and a plurality of lubricating positions are also arranged in the mandrel or on the large disc pressing plate for grease flushing and lubrication.

8. The rotary drilling rig comprises a luffing mechanism and is characterized in that: further comprising a multi-axis bushing supported disk connection of any of claims 1-7; wherein the amplitude variation mechanism is hinged with the disc connecting mechanism to drive the large disc to rotate.

9. The working method of the disk connecting mechanism supported by the multi-shaft sleeve is characterized in that: the large circular disc sleeved on the mandrel is driven to rotate through the external mechanism, so that the drilling mast is driven to rotate by surrounding the mandrel vertically inserted into the drilling mast, at the moment, the top of the drilling mast is abutted against the concave arc surface at the bottom of the support frame and moves along the concave arc surface, the swing motion track of the drilling mast takes the mandrel as a rotating shaft and the concave arc surface as a limiting surface, the shaking of the drilling mast in the swing process can be effectively reduced, and the swing stability of the drilling mast is improved.

10. The working method of the rotary drilling rig is characterized by comprising the following steps: a luffing mechanism of the rotary drilling rig drives a large circular disc sleeved on a mandrel to rotate, so that a drilling mast is driven to rotate around the mandrel vertically inserted into the drilling mast, the top of the drilling mast is abutted against a concave arc surface at the bottom of a support frame and moves along the concave arc surface, the swing motion track of the drilling mast takes the mandrel as a rotating shaft and the concave arc surface as a limiting surface, the rock of the drilling mast in the swing process can be effectively reduced, and the swing stability of the drilling mast is improved.