Piling drill rod cleaning system

Abstract

The utility model relates to the technical field of drilling rod cleaning, in particular to a piling drilling rod cleaning system which comprises a cleaning base, a cleaning base frame is arranged on one side of the cleaning base, a cleaning sliding frame is arranged on the cleaning base frame, a lifting assembly matched with the cleaning sliding frame is arranged on the cleaning base frame, and a cleaning assembly used for cleaning a drilling rod is arranged on the cleaning base frame. A cleaning assembly is arranged on the cleaning base, a water supply mechanism matched with the cleaning assembly is arranged on one side of the cleaning base frame, a rotating base assembly is arranged on the cleaning base, a jacking driving assembly matched with the rotating base assembly is arranged on the cleaning base frame, and a waste water recycling assembly matched with the rotating base assembly and the water supply mechanism is arranged on the cleaning base. By means of highly integrated mechanical structure design and an intelligent control system, automation, high efficiency and environmental protection of drill rod cleaning are achieved, cleaning quality and working efficiency are remarkably improved, labor cost and environmental influence are reduced, and the drill rod cleaning device is an important technical innovation in the field of building pile driver drill rod cleaning.

Description

Technical Field

[0001] The utility model relates to the technical field of drill rod cleaning, in particular to a piling drill rod cleaning system. Background Art

[0002] In the field of construction, piling is an indispensable cornerstone for building a solid foundation. The drill rod of the pile driver is a key component that directly contacts the soil. Its operating environment is complex and changeable, and it is often tightly attached to debris such as mud and cement mortar. If these residues are not cleaned in time, they will gradually harden, which will not only increase the difficulty of subsequent use of the drill rod and affect the accuracy of piling, but may also pose a threat to the safety of the overall building structure. Therefore, regular and effective cleaning and maintenance of the drill rod has become a key link in ensuring project quality and extending the life of the drill tool.

[0003] However, traditional drill pipe cleaning methods mostly rely on manual operations, which is not only inefficient and difficult to completely remove deep dirt, but also workers work for long periods of time in a harsh cleaning environment, which is prone to health risks. At the same time, the sewage discharged during the cleaning process is directly discharged into the natural environment without treatment, causing potential harm to the ecosystem. Although some mechanized cleaning devices have appeared on the market to try to improve cleaning efficiency, they usually only rely on a single high-pressure water flushing or basic physical brushing, which cannot achieve a deep and comprehensive cleaning effect, and there are still blind spots in cleaning, which cannot meet the needs of efficient and environmentally friendly cleaning.

[0004] How to solve the above technical problems is the subject faced by the present utility model. Summary of the invention

[0005] In order to address the deficiencies in the prior art, the utility model provides a pile driver rod cleaning system that is rationally designed, safe and reliable. Through a highly integrated and intelligent design concept, it not only solves the inefficiency and environmental problems of traditional manual cleaning, but also improves the cleaning quality and efficiency while also focusing on economy, safety and sustainability. It is a major technological advancement in the field of drill rod cleaning in the construction piling industry.

[0006] The utility model solves the technical problem by adopting the following technical solution: a pile driving drill rod cleaning system, comprising a cleaning base, a cleaning base frame is arranged on one side of the cleaning base, a cleaning slide frame slidably matched with the cleaning base frame is arranged on the cleaning base frame, a lifting assembly matched with the cleaning slide frame is arranged on the cleaning base frame, and a cleaning assembly for cleaning the drill rod is arranged on the cleaning base frame;

[0007] A water supply mechanism cooperating with the cleaning component is arranged on one side of the cleaning base, a rotating base component is arranged on the cleaning base, a top support driving component cooperating with the rotating base component is arranged on the cleaning base, and a wastewater recovery component cooperating with the rotating base component and the water supply mechanism is arranged on the cleaning base.

[0008] Furthermore, a lifting groove that slides with the cleaning slide is provided on the cleaning base; the cleaning slide includes a cleaning main frame, and sliding arms that slide with the cleaning base are provided at both ends of the cleaning main frame, and a lifting block that slides with the lifting groove is provided in the lifting groove, and the lifting block is plug-connected with the sliding arm.

[0009] Preferably, a stabilizing groove connected to the lifting groove is provided on the cleaning base frame, and a stabilizing frame located in the stabilizing groove is provided between the two lifting blocks.

[0010] Furthermore, the cleaning component includes a plurality of high-pressure nozzles arranged on the cleaning main frame, a kneading hydraulic arm is arranged on the sliding arm, a kneading brush head is arranged at the movable end of the kneading hydraulic arm, a pressure-stabilizing nozzle cooperating with the kneading brush head is arranged on the sliding arm, and a plurality of pressure-stabilizing nozzles are arranged on the pressure-stabilizing nozzle.

[0011] Furthermore, the sliding arm is provided with a first delivery pipe for connecting the high-pressure nozzle and the water supply mechanism, the sliding arm is provided with a second delivery pipe for connecting the pressure-stabilizing nozzle and the water supply mechanism, and the lifting block is provided with a through groove that cooperates with the first delivery pipe and the second delivery pipe;

[0012] The water supply mechanism comprises a water supply box, in which a water supply hose connected to the first delivery pipe and the second delivery pipe is arranged, and a water supply pump matched with the water supply hose is arranged in the water supply box.

[0013] Furthermore, the lifting assembly includes a lifting screw rod which is arranged in the lifting slot and slidingly cooperates with the lifting block.

[0014] In addition, the lifting component can also be configured as a lifting winch, the lifting winch is arranged on the lifting base frame, and the lifting winch is provided with a lifting rope that cooperates with the cleaning base frame.

[0015] Furthermore, the rotating base assembly includes a movable groove opened on the cleaning base, a sliding base slidingly matched with the movable groove is arranged in the movable groove, a rotating table assembled with the sliding base is arranged on the sliding base, a rotating disk is arranged on the rotating table, and a movable hydraulic rod connected to the sliding base is arranged at one end of the cleaning base close to the cleaning base.

[0016] Furthermore, the wastewater recovery component includes a recovery groove opened on the cleaning base and located directly below the movable groove, the sliding base is provided with a water-permeable hole cooperating with the recovery groove, the recovery groove is provided with a recovery pipe, and the recovery pipe is connected to the wastewater tank.

[0017] Preferably, a filter tank is provided on the cleaning base, a filter frame is provided in the filter tank, and a filter net is provided in the filter frame.

[0018] Furthermore, the top support driving assembly includes a driving groove vertically opened on the cleaning base frame, a driving screw is arranged in the driving groove, a top support frame cooperating with the driving screw is arranged in the driving groove, and a rotating circular frame rotatably cooperating with the top support frame is arranged on the top support frame;

[0019] The rotating circular frame is provided with a rotating gear, the top support frame is provided with a driving gear meshing with the rotating gear, the top support frame is provided with a driving motor, the top support frame is provided with a guide gear cooperating with the driving gear, the rotating circular frame is provided with a top support hydraulic rod, and a top support plate cooperating with the rotating base assembly is provided at the moving end of the top support hydraulic rod.

[0020] Compared with the traditional manual cleaning method, this technical solution realizes the automatic cleaning of drill pipes and greatly improves the cleaning efficiency. The cleaning slide moves along the track, and the cleaning components automatically spray high-pressure water without manual intervention, saving a lot of manpower and time costs.

[0021] The design of the cleaning carriage allows the drill pipe to be fully covered and cleaned, including every corner and concave and convex part of the surface, ensuring thorough cleaning. At the same time, the high-pressure nozzle and kneading hydraulic arm in the cleaning component can effectively remove stains attached to the surface of the drill pipe, making the cleaning effect more perfect.

[0022] The cleaning component not only includes a high-pressure nozzle, but is also equipped with multiple functions such as kneading hydraulic arms and pressure-stabilizing nozzles, which can cope with different types of stains and cleaning needs, improving the flexibility and applicability of cleaning.

[0023] The wastewater recovery component enables the wastewater generated during the cleaning process to be effectively collected and treated, reducing pollution to the environment. In addition, the high-pressure water cleaning method used in the cleaning process is more environmentally friendly than traditional chemical cleaning methods and saves water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model under the first viewing angle;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model under the second viewing angle;

[0026] Figure 3 It is a three-dimensional schematic diagram of the cooperation between the cleaning slide and the cleaning assembly of the utility model;

[0027] Figure 4 It is a three-dimensional structural schematic diagram of the top support driving assembly of the utility model;

[0028] Among them, the accompanying drawings are marked as:

[0029] 100, cleaning base; 110, movable slot; 200, cleaning base frame; 210, lifting slot; 220, stabilizing slot; 300, cleaning slide; 310, cleaning main frame; 320, sliding arm; 330, lifting block; 340, stabilizing frame; 400, lifting assembly; 500, cleaning assembly; 510, high-pressure nozzle; 520, kneading hydraulic arm; 530, kneading brush head; 540, pressure-stabilizing nozzle; 600, rotating base assembly; 610, sliding base; 620, rotating table; 630, rotating disk; 640, movable hydraulic rod; 700, top support driving assembly; 710, driving trough; 720, top support frame; 730, rotating circular frame; 740, rotating gear; 750, driving gear; 760, guide gear; 770, top support hydraulic rod; 780, top support disk; 800, wastewater recovery assembly; 810, recovery trough; 820, water permeable hole; 830, filter trough. Specific embodiments

[0030] See also Figures 1 to 4 As shown, a pile driving drill rod cleaning system includes a cleaning base 100, a cleaning base frame 200 is arranged on one side of the cleaning base 100, a cleaning slide 300 slidably matched with the cleaning base frame 200 is arranged on the cleaning base frame 200, a lifting component 400 matched with the cleaning slide 300 is arranged on the cleaning base frame 200, and a cleaning component 500 for cleaning the drill rod is arranged on the cleaning base frame 200;

[0031] A water supply mechanism cooperating with the cleaning component 500 is arranged on one side of the cleaning base 200, a rotating base component 600 is arranged on the cleaning base 100, a top support driving component 700 cooperating with the rotating base component 600 is arranged on the cleaning base 200, and a wastewater recovery component 800 cooperating with the rotating base component 600 and the water supply mechanism is arranged on the cleaning base 100.

[0032] Specifically, the cleaning base 100 and the cleaning base frame 200 serve as the supporting structure of the entire cleaning system. The cleaning base 100 is fixed on the ground or a specific platform, and the cleaning base frame 200 is installed thereon. A cleaning slide 300 is provided on one side of the cleaning base frame 200, which can move up and down in the vertical direction through sliding cooperation, so as to facilitate the adjustment of the cleaning component 500 to clean different parts of the drill pipe. The cleaning slide 300 carries the cleaning main frame 310 and various cleaning components 500, and can move up and down in the lifting groove 210 of the cleaning base frame 200 through the lifting component 400 to adapt to drill pipes of different lengths and ensure comprehensive cleaning. The water supply mechanism provides the required water source pressure for the cleaning component 500 to ensure the efficient cleaning process. The wastewater recovery component 800 collects the wastewater generated during the cleaning process, reduces environmental pollution, and realizes resource recycling. The rotating base component 600 allows the drill pipe to rotate during the cleaning process to ensure that the entire body of the drill pipe can be evenly cleaned. The rotating table 620 is driven to rotate by the movable hydraulic rod 640, which improves the comprehensiveness and efficiency of the cleaning. The top support drive assembly 700 is responsible for stably supporting the drill pipe before or during cleaning, and accurately controlling the lifting and stabilization of the drill pipe by the top support plate 780 to ensure safety and stability during the cleaning process.

[0033] Furthermore, the cleaning base frame 200 is provided with a lifting groove 210 that slides with the cleaning slide 300; the cleaning slide 300 includes a cleaning main frame 310, and both ends of the cleaning main frame 310 are provided with sliding arms 320 that slide with the cleaning base frame 200, and the lifting groove 210 is provided with a lifting block 330 that slides with the lifting groove 210, and the lifting block 330 is plug-connected with the sliding arm 320.

[0034] Preferably, a stabilizing groove 220 communicating with the lifting groove 210 is provided on the cleaning base frame 200 , and a stabilizing frame 340 located in the stabilizing groove 220 is provided between the two lifting blocks 330 .

[0035] Furthermore, the lifting assembly 400 includes a lifting screw rod disposed in the lifting slot 210 and slidably matched with the lifting block 330 .

[0036] In addition, the lifting component 400 can also be configured as a lifting winch, and the lifting winch is arranged on the lifting base frame, and the lifting winch is provided with a lifting rope that cooperates with the cleaning base frame 200.

[0037] Specifically, the cleaning frame 200 is installed on one side of the cleaning base 100, and can be adjusted in position through a sliding fit mechanism to adapt to drill rods of different lengths and diameters. The lifting assembly 400 uses a lifting screw or a lifting winch to control the lifting block 330 to move up and down, so that the cleaning assembly 500 can perform cleaning operations along the height change of the drill rod to ensure full coverage.

[0038] Furthermore, the cleaning component 500 includes a plurality of high-pressure nozzles 510 arranged on the cleaning main frame 310, a kneading hydraulic arm 520 is arranged on the sliding arm 320, a kneading brush head 530 is arranged at the movable end of the kneading hydraulic arm 520, a pressure-stabilizing nozzle 540 cooperating with the kneading brush head 530 is arranged on the sliding arm 320, and a plurality of pressure-stabilizing nozzles are arranged on the pressure-stabilizing nozzle 540.

[0039] Furthermore, the sliding arm 320 is provided with a first delivery pipe for connecting the high-pressure nozzle 510 and the water supply mechanism, the sliding arm 320 is provided with a second delivery pipe for connecting the pressure-stabilizing nozzle 540 and the water supply mechanism, and the lifting block 330 is provided with a through groove that cooperates with the first delivery pipe and the second delivery pipe;

[0040] The water supply mechanism comprises a water supply box, in which a water supply hose connected to the first delivery pipe and the second delivery pipe is arranged, and a water supply pump matched with the water supply hose is arranged in the water supply box.

[0041] In the cleaning assembly 500, the high-pressure nozzle 510 is used to spray high-pressure water to remove stubborn stains on the surface of the drill rod. The kneading hydraulic arm 520 and the kneading brush head 530 are driven by hydraulic pressure to physically rub the surface of the drill rod, and cooperate with the high-pressure nozzle 510 to more thoroughly remove dirt. The pressure-stabilizing nozzle 540 and the pressure-stabilizing nozzle provide a continuous water flow to assist in cleaning and flushing away loosened dirt.

[0042] Furthermore, the rotating base assembly 600 includes a movable groove 110 opened on the cleaning base 100, a sliding base 610 slidingly matched with the movable groove 110 is arranged in the movable groove 110, a rotating table 620 assembled with the sliding base 610 is arranged on the sliding base 610, a rotating disk 630 is arranged on the rotating table 620, and a movable hydraulic rod 640 connected to the sliding base is arranged at one end of the cleaning base 100 close to the cleaning frame 200.

[0043] Furthermore, the wastewater recovery component 800 includes a recovery groove 810 opened on the cleaning base 100 and located directly below the movable groove 110, and the sliding base 610 is provided with a water-permeable hole 820 that cooperates with the recovery groove 810. A recovery pipe is provided in the recovery groove 810, and the recovery pipe is connected to the wastewater tank.

[0044] Preferably, a filter tank 830 is provided on the cleaning base 100 , a filter frame is provided in the filter tank 830 , and a filter net is provided in the filter frame.

[0045] Further, the top support driving assembly 700 includes a driving groove 710 vertically opened on the cleaning base frame 200, a driving screw is arranged in the driving groove 710, a top support frame 720 cooperating with the driving screw is arranged in the driving groove 710, and a rotating circular frame 730 rotatably cooperating with the top support frame 720 is arranged on the top support frame 720;

[0046] The rotating circular frame 730 is provided with a rotating gear 740, the top support frame 720 is provided with a driving gear 750 meshing with the rotating gear 740, the top support frame 720 is provided with a driving motor, the top support frame 720 is provided with a guide gear 760 cooperating with the driving gear 750, the rotating circular frame 730 is provided with a top support hydraulic rod 770, and a top support plate 780 cooperating with the rotating base assembly 600 is provided at the moving end of the top support hydraulic rod 770.

[0047] Specifically, the rotating base assembly 600 drives the rotating table 620 through the movable hydraulic rod 640, so that the drill rod can rotate automatically during the cleaning process, ensuring 360-degree cleaning without dead angles. The design of the movable groove 110 and the sliding base 610 allows the drill rod to be flexibly placed and adapt to the dynamic needs during the cleaning process. The top support drive assembly 700 controls the lifting and lowering of the top support hydraulic rod 770 through a driving motor, a driving screw and a series of transmission mechanisms such as a rotating gear (740, a guide gear 760), thereby accurately applying pressure to the rotating base assembly 600, ensuring the stability of the drill rod during the cleaning process and the effective function of the cleaning assembly 500.

[0048] Based on the above-mentioned technical solution of the drill pipe automatic cleaning system, the operation steps are as follows:

[0049] Preparation stage:

[0050] Confirm that all components of the drill pipe automatic cleaning system have been installed, including the cleaning base 100, the cleaning base 200, the cleaning slide 300, the water supply mechanism, the wastewater recovery assembly 800, the rotating base assembly 600, the top support drive assembly 700, etc.; check whether the water supply tank is filled with clean water, confirm that the water supply pump is working normally, and check whether the wastewater tank is empty and ready to receive the recovered wastewater; start the system power supply, perform a preliminary equipment self-inspection, and ensure that the motors, pumps, transmission devices, etc. of each part are operating normally.

[0051] Loading drill pipe:

[0052] Use lifting equipment to place the drill rod that needs to be cleaned steadily on the rotating disk 630 of the rotating base assembly 600 to ensure that the drill rod is stable; adjust the top support drive assembly 700, control the top support hydraulic rod 770 to extend through the drive motor, and the top support disk 780 contacts and stabilizes the drill rod to prevent shaking during cleaning.

[0053] Adjust the cleaning position:

[0054] By controlling the lifting assembly 400 of the cleaning carriage 300, the height of the cleaning main frame 310 is adjusted so that it is aligned with the first section of the drill rod that needs to be cleaned. At the same time, the lateral position of the cleaning carriage 300 can be adjusted to ensure that the cleaning assembly 500 can fully cover the surface of the drill rod.

[0055] Start cleaning:

[0056] The water supply mechanism is turned on, and water flows through the first delivery pipe to the high-pressure nozzle 510 to start strong flushing of the drill pipe surface; at the same time, the kneading hydraulic arm 520 is started to make the kneading brush head 530 fit the drill pipe surface to remove stubborn stains by physical rubbing; the pressure-stabilizing nozzle releases a stable water flow to assist flushing and reduce wear caused by brushing.

[0057] Rotating drill pipe:

[0058] Activate the drive motor in the top support drive assembly 700 and use it in conjunction with the rotating base assembly 600 to slowly rotate the drill rod, ensuring that the cleaning assembly 500 can clean every part of the drill rod in all directions without dead ends.

[0059] Cleaning process monitoring and adjustment:

[0060] During the cleaning process, according to the actual cleaning effect, the pressure of the high-pressure water, the pressure of the kneading brush head 530 and the rotation speed are adjusted in time to achieve the best cleaning effect. The wastewater recovery component 800 is monitored to ensure that the wastewater flows smoothly into the recovery tank 810 and enters the wastewater tank through the recovery pipe, and at the same time, the filter tank 830 is observed to see if it needs to be cleaned.

[0061] Cleaning and unloading:

[0062] When the drill rod is cleaned, all cleaning actions are stopped, the top support hydraulic rod 770 is retracted, and the support for the drill rod is released. The cleaned drill rod is unloaded from the rotating disk 630 and prepared for the next stage of operation or storage.

[0063] System maintenance and cleaning:

[0064] After cleaning, turn off the system power supply and perform necessary inspection and cleaning on the cleaning component 500 to prevent residual dirt from clogging the nozzle or affecting the next use. Regularly check the wear of each component and replace the worn parts in time to maintain the overall performance of the system.

[0065] Technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A piling drill rod cleaning system, characterized in that: The cleaning base (100) comprises a cleaning frame (200) disposed on one side of the cleaning base (100); a cleaning slide (300) slidably matched with the cleaning frame (200) is disposed on the cleaning frame (200); a lifting assembly (400) matched with the cleaning slide (300) is disposed on the cleaning frame (200); and a cleaning assembly (500) for cleaning a drill rod is disposed on the cleaning frame (200); A water supply mechanism cooperating with the cleaning component (500) is arranged on one side of the cleaning base (200); a rotating base component (600) is arranged on the cleaning base (100); a top support driving component (700) cooperating with the rotating base component (600) is arranged on the cleaning base (200); and a wastewater recovery component (800) cooperating with the rotating base component (600) and the water supply mechanism is arranged on the cleaning base (100).

2. A piling drill rod cleaning system as claimed in claim 1, characterized in that: The cleaning base frame (200) is provided with a lifting groove (210) which is slidably matched with the cleaning slide (300); the cleaning slide (300) comprises a cleaning main frame (310), both ends of the cleaning main frame (310) are provided with sliding arms (320) which are slidably matched with the cleaning base frame (200), the lifting groove (210) is provided with a lifting block (330) which is slidably matched with the lifting groove (210), and the lifting block (330) is plug-connected with the sliding arm (320).

3. A piling drill rod cleaning system as claimed in claim 2, characterized in that: The cleaning base frame (200) is provided with a stabilizing groove (220) which is in communication with the lifting groove (210), and a stabilizing frame (340) located in the stabilizing groove (220) is provided between the two lifting blocks (330).

4. A piling drill rod cleaning system as claimed in claim 2, characterized in that: The cleaning component (500) comprises a plurality of high-pressure nozzles (510) arranged on the cleaning main frame (310); a kneading hydraulic arm (520) is arranged on the sliding arm (320); a kneading brush head (530) is arranged at the movable end of the kneading hydraulic arm (520); a pressure-stabilizing nozzle (540) cooperating with the kneading brush head (530) is arranged on the sliding arm (320); and a plurality of pressure-stabilizing nozzles are arranged on the pressure-stabilizing nozzle (540).

5. A piling drill rod cleaning system as claimed in claim 4, characterized in that: The sliding arm (320) is provided with a first delivery pipe for connecting the high-pressure nozzle (510) and the water supply mechanism, the sliding arm (320) is provided with a second delivery pipe for connecting the pressure-stabilizing nozzle (540) and the water supply mechanism, and the lifting block (330) is provided with a through groove that cooperates with the first delivery pipe and the second delivery pipe; The water supply mechanism comprises a water supply box, in which a water supply hose connected to the first delivery pipe and the second delivery pipe is arranged, and a water supply pump matched with the water supply hose is arranged in the water supply box.

6. A piling drill rod cleaning system as claimed in claim 1, characterized in that: The rotating base assembly (600) comprises a movable groove (110) provided on the cleaning base (100), a sliding base (610) slidably matched with the movable groove (110) being provided in the movable groove (110), a rotating table (620) assembled with the sliding base (610) being provided on the sliding base (610), a rotating disk (630) being provided on the rotating table (620), and a movable hydraulic rod (640) connected with the sliding base being provided at one end of the cleaning base (100) close to the cleaning base frame (200).

7. A piling drill rod cleaning system as claimed in claim 6, characterized in that: The wastewater recovery component (800) comprises a recovery groove (810) opened on the cleaning base (100) and located directly below the movable groove (110); the sliding base (610) is provided with a water-permeable hole (820) cooperating with the recovery groove (810); a recovery pipe is provided in the recovery groove (810), and the recovery pipe is connected to the wastewater tank.

8. A piling drill rod cleaning system as claimed in claim 7, characterized in that: The cleaning base (100) is provided with a filter tank (830), a filter frame is provided in the filter tank (830), and a filter net is provided in the filter frame.

9. A piling drill rod cleaning system as claimed in claim 1, characterized in that: The support driving assembly (700) comprises a driving groove (710) vertically opened on the cleaning base frame (200), a driving screw rod is arranged in the driving groove (710), a support frame (720) matched with the driving screw rod is arranged in the driving groove (710), and a rotating circular frame (730) rotatably matched with the support frame (720) is arranged on the support frame (720); The rotating circular frame (730) is provided with a rotating gear (740), the supporting frame (720) is provided with a driving gear (750) meshing with the rotating gear (740), the supporting frame (720) is provided with a driving motor, the supporting frame (720) is provided with a guide gear (760) cooperating with the driving gear (750), the rotating circular frame (730) is provided with a supporting hydraulic rod (770), and a supporting plate (780) cooperating with the rotating base assembly (600) is provided at the moving end of the supporting hydraulic rod (770).

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