Low headroom mixing pile drill rod segment splicing device

Abstract

The present invention relates to the technical field of pile foundation construction, and in particular to a low-headroom mixing pile drill rod section splicing device. The device comprises an outer frame connected to a fixed foundation, a top plate is provided on the top of the outer frame, a bottom plate is provided inside the outer frame for sliding up and down, a longitudinal adjustment cylinder is connected between the top plate and the bottom plate, and both the top plate and the bottom plate are provided with through holes for the drill rod sections to be spliced ​​to pass through; a clamping part for clamping the drill rod sections to be spliced ​​is provided on the bottom plate. After the drill rod sections to be spliced ​​are clamped by the clamping part, the height of the drill rod sections to be spliced ​​is slowly adjusted by the longitudinal adjustment cylinder until the bottom end of the drill rod sections to be spliced ​​is spliced ​​with the top end of the spliced ​​drill rod sections, so as to prepare for the subsequent bolt fastening and docking operation through the power head. The entire splicing operation is convenient and efficient, and because the device is simple in structure and high in strength compared to equipment such as a mechanical arm, it can withstand the large impact force generated by the power head, greatly improving the safety of the splicing operation.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation construction, and in particular to a low-clearance mixing pile drill rod section splicing device. Background Art

[0002] In the existing pile foundation construction drilling process, there are often low-clearance construction conditions such as under high-voltage lines, communication lines or bridges. Due to the limited construction height and the long length of the drill rod, the drill rod and its ancillary equipment require a higher construction space when drilling vertically downward. The power grid and communication network lines in the upper space can only be temporarily cut off and then connected after the drilling construction is completed. This requires a long time of negotiation and coordination with the power grid department, which often delays the construction period. If coordination is really impossible, the construction design can only be modified, resulting in a huge waste of time, economy and labor costs.

[0003] An existing solution is to divide the drill pipe into multiple sections, and then splice the drill pipe sections one by one as the drilling progresses.

[0004] In the construction of low-headroom mixing piles, when splicing drill rods section by section, it is impossible to complete it manually due to the heavy weight of the drill rods. The existing practice is to use a mechanical arm to assist in splicing drill rods. The mechanical arm clamps the middle of the drill rod and transfers the drill rod vertically to the pile position. The power head used to tighten the bolts at the drill rod splicing slowly descends, and the lower joint of the power head is aligned with the upper joint of the drill rod for docking. This action requires very high control of the descending speed of the power head. If you are not careful, the weight of the power head will be loaded on the mechanical arm and cause damage to the mechanical arm. The rotation radius of the mechanical arm clamping the drill rod is relatively large. If you want to design the mechanical arm strength to be sufficient to withstand the weight of the power head, its geometric size and weight will be very large, and the strength requirements for the main tower will also be greatly increased, which is difficult to achieve. In addition, since the position where the mechanical arm clamps the drill rod is the middle of the drill rod, it is difficult to have room for adjustment when the drill rod is docked because the drill rod is tightly clamped by the mechanical arm, which makes it difficult to dock the drill rods. Summary of the invention

[0005] The purpose of the invention is to provide a device which can safely and efficiently complete the splicing of drill rod sections of low-headroom mixing piles.

[0006] To achieve the above-mentioned purpose, the present invention provides a low-headroom mixing pile drill rod section splicing device, comprising an outer frame connected to a fixed foundation, a top plate is provided on the top of the outer frame, a bottom plate is provided inside the outer frame for sliding up and down, a longitudinal adjustment cylinder is connected between the top plate and the bottom plate, and through holes are provided on the top plate and the bottom plate for allowing the drill rod section to be spliced ​​to pass through; a clamping portion is provided on the bottom plate for clamping the drill rod section to be spliced.

[0007] Optionally, the clamping portion includes a plurality of clamping assemblies evenly arranged in the circumferential direction of the drill rod section to be spliced, and the clamping assembly includes a reaction seat fixedly connected to a base plate and a horizontal adjustment cylinder arranged between the reaction seat and the drill rod section to be spliced.

[0008] Optionally, the horizontal adjustment cylinder contacts the drill rod section to be spliced ​​through a clamping plate.

[0009] Optionally, the shape of the portion of the clamping plate in contact with the drill rod section to be spliced ​​is adapted to the shape of the outer wall of the drill rod section to be spliced.

[0010] Optionally, there are multiple longitudinal adjustment cylinders, and the multiple longitudinal adjustment cylinders are evenly distributed in the circumferential direction of the drill rod section to be spliced.

[0011] Optionally, the longitudinal adjustment cylinder is hinged to the top plate.

[0012] Optionally, the longitudinal adjustment cylinder is hinged to the base plate.

[0013] Optionally, a support platform extending inwardly is provided at the bottom of the outer frame, and the support platform is used to limit the bottom plate to prevent the bottom plate from escaping from the outer frame.

[0014] The present invention provides a low-headroom mixing pile drill rod section splicing device, comprising an outer frame connected to a fixed foundation, a top plate provided on the top of the outer frame, a bottom plate provided inside the outer frame for sliding up and down, a longitudinal adjustment cylinder connected between the top plate and the bottom plate, through holes for passing the drill rod sections to be spliced ​​are provided on both the top plate and the bottom plate; a clamping portion for clamping the drill rod sections to be spliced ​​is provided on the bottom plate. After the drill rod sections to be spliced ​​are clamped by the clamping portion, the height of the drill rod sections to be spliced ​​is slowly adjusted by the longitudinal adjustment cylinder until the bottom end of the drill rod sections to be spliced ​​is spliced ​​with the top end of the spliced ​​drill rod sections, so as to prepare for the subsequent bolt fastening and docking operation by the power head. The entire splicing operation is convenient and efficient, and because the device has a simple structure and high strength compared to equipment such as a mechanical arm, it can withstand the large impact force generated by the power head, greatly improving the safety of the splicing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a low-clearance mixing pile drill rod section splicing device provided by an embodiment of the present invention.

[0016] Reference numerals:

[0017] 1. Drill rod section to be spliced; 2. Longitudinal adjustment cylinder; 3. Outer frame; 31. Top plate; 32. Support platform; 4. Clamping plate; 5. Horizontal adjustment cylinder; 6. Reaction seat; 7. Bottom plate; 8. Spliced ​​drill rod section. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1 As shown, a low-headroom mixing pile drill rod section splicing device provided by an embodiment of the present invention includes an outer frame 3 connected to a fixed foundation. The outer frame 3 can be an integral cylindrical structure formed by welding a plurality of rod profiles. A top plate 31 is provided on the top of the outer frame 3. The top plate 31 can be connected to the outer frame 3 by bolts or by welding to the outer frame 3. A bottom plate 7 is provided inside the outer frame 3 for sliding up and down. A longitudinal adjustment cylinder 2 is connected between the top plate 31 and the bottom plate 7. When the longitudinal adjustment cylinder 2 is extended or retracted, the bottom plate 7 can slide up and down in the outer frame 3. Both the top plate 31 and the bottom plate 7 are provided with through holes for allowing the drill rod section 1 to be spliced ​​to pass through, and the bottom plate 7 is provided with a clamping portion for clamping the drill rod section 1 to be spliced.

[0020] When performing the splicing operation of the drill rod sections, the device is set above the existing drill rod section 8 so that the axis of the through hole on the bottom plate 7 is opposite to the axis of the existing drill rod section 8, and then the device is connected to the fixed foundation. The drill rod section 1 to be spliced ​​is hoisted above the device by a crane or a mechanical arm, and the drill rod section 1 to be spliced ​​is lowered to pass through the through holes on the top plate 31 and the bottom plate 7. After being lowered to the appropriate position, the clamping part on the bottom plate 7 clamps the drill rod section 1 to be spliced, and the crane or mechanical arm can be released at this time. The height of the drill rod section 1 to be spliced ​​is slowly adjusted by longitudinally adjusting the oil cylinder 2 until the bottom end of the drill rod section 1 to be spliced ​​is spliced ​​with the top end of the existing drill rod section 8, so as to prepare for the operation of screw-fastening and docking the two drill rod sections through the power head.

[0021] When the docking operation is performed through the power head, even if the operation is not careful, the power head will generate a large impact force in a certain direction, and this force will be transmitted and loaded onto the device. Compared with equipment such as a robotic arm, this device has a simple structure and high strength, and does not have a multi-degree-of-freedom adjustment shaft. Therefore, it can withstand a large impact force without causing damage to the device.

[0022] In some embodiments, the clamping portion includes a plurality of clamping assemblies evenly arranged in the circumferential direction of the drill rod section 1 to be spliced, for example, two clamping assemblies are symmetrically arranged on both sides of the drill rod section 1 to be spliced, or four clamping assemblies are evenly spaced around the drill rod section 1 to be spliced, etc., as long as the plurality of clamping assemblies are located away from the longitudinal adjustment cylinder 2 at each quadrant point of the drill rod section 1 to be spliced.

[0023] Each clamping assembly includes a reaction seat 6 fixedly connected to the base plate 7 and a horizontal adjustment cylinder 5 arranged between the reaction seat 6 and the drill rod section 1 to be spliced. The reaction seat 6 can be fixedly connected to the base plate 7 by bolts or by welding. The cylinder body of the horizontal adjustment cylinder 5 is connected to the reaction seat 6, and the telescopic rod can directly contact the outer wall of the drill rod section 1 to be spliced. Of course, the telescopic rod is preferably in contact with the drill rod section 1 to be spliced ​​through the clamping plate 4. The clamping plate 4 can increase the contact area with the drill rod section 1 to be spliced, reduce the pressure per unit area, and avoid damage to the drill rod section 1 to be spliced.

[0024] The multiple clamping assemblies can not only clamp and fix the drill rod section 1 to be spliced, but also fine-tune the horizontal position of the drill rod section 1 to be spliced ​​by adjusting the different extension and contraction amounts of the respective horizontal adjustment cylinders 5, so that the drill rod section 1 to be spliced ​​can be more accurately docked with the existing drill rod section 8.

[0025] Furthermore, the shape of the portion of the clamping plate 4 in contact with the drill rod section 1 to be spliced ​​is preferably adapted to the shape of the outer wall of the drill rod section 1 to be spliced, so that the clamping plate 4 can be in closer contact with the drill rod section 1 to be spliced.

[0026] In some embodiments, there are multiple longitudinal adjustment cylinders 2, and the multiple longitudinal adjustment cylinders 2 are evenly distributed in the circumference of the drill rod section 1 to be spliced. The multiple longitudinal adjustment cylinders 2 work together to realize the lifting and lowering of the bottom plate 7, which can enhance the stability of the lifting and lowering of the bottom plate 7 and enable the device to withstand greater impact force from the power head.

[0027] Furthermore, the longitudinal adjustment cylinder 2 can be hinged to the top plate 31, so that the longitudinal angle of the drill rod section 1 to be spliced ​​can be adjusted by different extension and contraction amounts of multiple longitudinal adjustment cylinders 2, so that the drill rod section 1 to be spliced ​​can be more accurately docked with the existing drill rod section 8.

[0028] In other embodiments, the longitudinal adjustment cylinder 2 may also be hinged to the bottom plate 7, so that the longitudinal angle of the drill rod section 1 to be spliced ​​can also be adjusted by different extension and contraction amounts of multiple longitudinal adjustment cylinders 2. Of course, the preferred solution is that the upper and lower ends of the longitudinal adjustment cylinder 2 are hinged to the top plate 31 and the bottom plate 7 respectively.

[0029] In some embodiments, a support platform 32 extending inward is provided at the bottom of the outer frame 3, and the support platform 32 is used to limit the bottom plate 7 to prevent the bottom plate 7 from falling out of the outer frame 3. This can prevent the bottom plate 7 from falling out of the outer frame 3 due to operational errors or loss of control of the longitudinal adjustment cylinder 2, thereby further improving the safety of the device.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low clearance mixing pile drill rod section splicing device, characterized in that: It comprises an outer frame connected to a fixed foundation, a top plate is provided on the top of the outer frame, a bottom plate is provided inside the outer frame for sliding up and down, a longitudinal adjustment oil cylinder is connected between the top plate and the bottom plate, and through holes are provided on the top plate and the bottom plate for passing the drill rod section to be spliced; a clamping part is provided on the bottom plate for clamping the drill rod section to be spliced; The clamping part comprises a plurality of clamping assemblies evenly arranged in the circumferential direction of the drill rod section to be spliced, and the clamping assembly comprises a reaction seat fixedly connected to the bottom plate and a horizontal adjustment cylinder arranged between the reaction seat and the drill rod section to be spliced; The plurality of clamping assemblies fine-tune the horizontal position of the drill rod section to be spliced ​​by means of different extension and contraction amounts of their respective horizontal adjustment cylinders, and the longitudinal adjustment cylinders are hinged to the top plate or the bottom plate; During operation, the drill rod section to be spliced ​​is hoisted above the device, and the drill rod section to be spliced ​​is lowered so that it passes through the through holes on the top plate and the bottom plate. After being lowered to a suitable position, the clamping part on the bottom plate clamps the drill rod section to be spliced, and the height of the drill rod section to be spliced ​​is adjusted by the longitudinal adjustment cylinder until the bottom end of the drill rod section to be spliced ​​is spliced ​​with the top end of the spliced ​​drill rod section.

2. The low clearance mixing pile drill rod segment splicing device according to claim 1 is characterized in that: The horizontal adjustment cylinder contacts the drill rod section to be spliced ​​through a clamping plate.

3. The low clearance mixing pile drill rod segment splicing device according to claim 2 is characterized in that: The shape of the portion of the clamping plate in contact with the drill rod section to be spliced ​​is adapted to the shape of the outer wall of the drill rod section to be spliced.

4. The low clearance mixing pile drill rod segment splicing device according to claim 1 is characterized in that: There are multiple longitudinal adjustment cylinders, and the multiple longitudinal adjustment cylinders are evenly distributed in the circumferential direction of the drill rod section to be spliced.

5. The low clearance mixing pile drill rod segment splicing device according to claim 1 is characterized in that: A support platform extending inward is provided at the bottom of the outer frame, and the support platform is used to limit the bottom plate to prevent the bottom plate from escaping from the outer frame.

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