Screw type composite pile forming equipment

Abstract

The utility model relates to screw type composite pile forming equipment. The screw type composite pile forming equipment comprises a rack, a walking mechanism, a stand column mechanism, a bareheaded drill rod, a grouting device, a threaded drill rod, a hoisting mechanism, a hollow power head and a drill rod driving piece, and the drill rod driving piece is used for driving the hollow power head to move in the first direction. And the hollow power head is constructed to enable the hollow transmission shaft to rotate until the matching part and the clamping part are mutually clamped and then continue to rotate so as to drive the bareheaded drill rod to rotate, or the hollow power head rotates until the matching part is mutually matched with the guide sliding part and enables the hollow power head to slide relative to the bareheaded drill rod in the first direction. By adjusting the position of the hollow power head on the bareheaded drill rod, it is ensured that the gravity center of the hollow power head is kept low on the stand column mechanism in the whole hole forming process, and the problem that equipment swings or turns over due to the fact that the gravity center of the power head of the threaded drill rod is too high in the deep pile hole forming process is solved. And the equipment stability and the use safety of the screw type composite pile forming equipment in the deep pile forming process are improved.

Description

Technical Field

[0001] This utility model relates to the field of foundation engineering construction technology, and in particular to a screw-type composite pile-forming device. Background Technology

[0002] In the field of civil engineering, piles can be classified into three main categories based on the impact of pile-laying methods on soil layers: non-displacement piles, partially displacement piles, and displacement piles. The type of pile driver determines the pile's bearing capacity, construction efficiency, project cost, and environmental and economic aspects. The bearing capacity of a pile is mainly determined by side friction and the geological conditions of the bearing stratum. Non-displacement piles and cast-in-place piles, on the other hand, suffer from low single-pile bearing capacity and mud pollution, among other technical, cost, and environmental problems, which severely restrict their future development.

[0003] Traditional pile-forming methods often encounter problems when faced with hard geological conditions or pile depth requirements. These problems can easily lead to accidents such as equipment swaying or overturning due to excessively high column height and high center of gravity of the drill rod power head. In addition, insufficient loading force can prevent the completion of pile-forming work under hard geological conditions. Utility Model Content

[0004] Therefore, it is necessary to provide a screw-type composite pile-forming device that can improve the safety of equipment use and meet the pile-forming requirements under hard geological conditions.

[0005] A screw-type composite pile-forming device, characterized in that it comprises:

[0006] frame;

[0007] A walking mechanism is located at the bottom of the frame;

[0008] A column mechanism having a loading end beam and a top end beam; the end of the column mechanism away from the top end beam is mounted on the frame;

[0009] The hollow rod-shaped sprue drill rod has a retaining part and a guide sliding part on its side wall; the sprue drill rod is slidably mounted on the column mechanism;

[0010] The grouting device is fixed and connected at one end to the end of the ballast drill rod near the top end beam;

[0011] A hollow rod-shaped threaded drill rod, one end of which is coaxially connected to the end of the polished drill rod away from the top end beam;

[0012] The winch mechanism includes a winch device and a protective steel wire rope; the winch device is installed on the frame; the protective steel wire rope is hung on the top end beam, with one end wound around the winch device and the other end connected to the grouting device.

[0013] A hollow power head is slidably mounted on the column mechanism; the hollow drive shaft of the hollow power head is sleeved on the drill rod; the inner wall of the hollow drive shaft has a mating part;

[0014] A drill rod drive unit is connected to the hollow power head for transmission and is used to drive the hollow power head to move along a first direction; the first direction is consistent with the longitudinal direction of the ballast drill rod.

[0015] The hollow power head is configured to enable the hollow drive shaft to rotate until the mating part and the clamping part are locked together, and then continue to rotate to drive the sprue drill rod to rotate, or rotate until the mating part and the guide slide part are engaged and the hollow power head can slide relative to the sprue drill rod in the first direction.

[0016] The aforementioned screw-type composite pile-forming equipment, when the mating part and the clamping part are clamped together, can fix the polished drill rod in the hollow drive shaft of the hollow power head and realize the transmission connection between the two; when the mating part and the guide slide part are mated or aligned, the hollow power head can slide relative to the polished drill rod in the first direction. At this time, there is a gap between the polished drill rod and the hollow drive shaft of the hollow power head, and the mating part can slide back and forth on the guide slide part. When drilling is required before pile driving, first adjust the hollow power head to the lower end of the smooth drill rod. Then, use the hollow power head to drive the hollow transmission shaft to rotate forward until the mating part and the clamping part are locked together. After that, continue to drive the hollow transmission shaft to rotate forward, so as to drive the smooth drill rod and the threaded drill rod to rotate. At the same time, the drill rod drive component drives the hollow power head to move the smooth drill rod downward in the first direction, and the winch device simultaneously and slowly releases the line to realize the drilling work of the threaded drill rod. When all or at least most of the threaded drill rod is below the ground, adjust the position of the hollow power head on the smooth drill rod upward a certain distance, and then continue to repeat the above drilling action. Repeat this process until the pile hole of the preset depth is obtained.

[0017] Therefore, in the process of drilling deep piles, the above-mentioned screw-type composite pile-forming equipment ensures that the hollow power head maintains a low center of gravity on the column mechanism throughout the entire drilling process by adjusting the position of the hollow power head on the smooth drill rod. This solves the problem of equipment swaying or overturning caused by the excessively high center of gravity of the screw drill rod power head during the drilling process of deep piles, and improves the equipment stability and safety of the screw-type composite pile-forming equipment in the process of drilling deep piles. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the screw-type composite pile-forming device in a preferred embodiment of the present invention;

[0019] Figure 2 for Figure 1A partial view of the upper part of the screw-type composite pile-forming equipment shown;

[0020] Figure 3 for Figure 1 A partial view of the lower half of the screw-type composite pile-forming device shown.

[0021] Explanation of reference numerals in the detailed embodiments: 100, screw-type composite pile-forming equipment; 110, frame; 120, walking mechanism; 130, column mechanism; 131, top end beam; 132, loading end beam; 140, smooth drill rod; 150, grouting device; 160, threaded drill rod; 170, winch mechanism; 171, winch device; 172, protective wire rope; 180, hollow power head; 190, drill rod drive component; 201, chain drive. Components; 2011, transmission chain; 2012, power sprocket; 2013, first lifting sprocket; 2014, second lifting sprocket; 2015, third lifting sprocket; 2016, first pressing sprocket; 2017, second pressing sprocket; 2018, third pressing sprocket; 202, lifting mechanism; 203, pressurizing mechanism; 2031, upper clamping structure; 2032, lower clamping structure; 2033, pressurizing and lifting structure; 10, first direction. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements. It is also understood that when an element is referred to as being "between" two elements, it may be the only one between the two elements, or there may be one or more intermediate elements.

[0025] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0026] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0027] Please see Figures 1 to 3 The screw-type composite pile-forming device 100 in the preferred embodiment of this utility model includes a frame 110, a walking mechanism 120, a column mechanism 130, a smooth drill rod 140, a grouting device 150, a threaded drill rod 160, a winch mechanism 170, a hollow power head 180, and a drill rod drive component 190.

[0028] The traveling mechanism 120 is located at the bottom of the frame 110. The traveling mechanism 120 can be a tracked structure, a walking structure, or a wheeled structure. In this embodiment, to meet the high torque requirements of threaded drill rods and polished drill rods, the traveling mechanism 120 is a walking structure.

[0029] The column mechanism 130 has a loading end beam 132 and a top end beam 131. The end of the column mechanism 130 furthest from the top end beam 131 is mounted on the frame 110. Therefore, the loading end beam 132 is located between the top end beam 131 and the end of the column mechanism 130 connected to the frame 110. One end of the column mechanism 130 can be directly fixed to the frame 110 or rotatably connected to the frame 110.

[0030] The slick drill rod 140 has a rod-like structure. The sidewall of the slick drill rod 140 has a retaining portion (not shown) and a guide sliding portion (not shown). The slick drill rod 140 is slidably mounted on the column mechanism 130. One end of the grouting device 150 is fixed and connected to the end of the slick drill rod 140 near the top end beam 131.

[0031] The threaded drill rod 160 is a hollow rod-shaped structure. One end of the threaded drill rod 160 is coaxially connected to the end of the polished drill rod 140 away from the top end beam 131, and they are connected in a transmission manner. Thus, the threaded drill rod 160 and the polished drill rod 140 are connected. In practical applications, when the column mechanism 130 is fixed on the frame 110, both the threaded drill rod 160 and the polished drill rod 140 are in an upright state; when the column mechanism 130 is rotatably connected to the frame 110, the column mechanism 130 rotates when the screw-type composite pile-forming equipment 100 is in a traveling state or not in a working state, and together with the threaded drill rod 160 and the polished drill rod 140, they are all in a horizontal state; when the screw-type composite pile-forming equipment 100 is performing pile-forming work at the pile driving position, the column mechanism 130, the threaded drill rod 160, and the polished drill rod 140 are all in an upright state.

[0032] To reduce processing costs and enable the screw-type composite pile-forming equipment 100 to complete pile-forming work at greater depths, in some embodiments, the threaded drill rod 160 may include multiple sub-drill rods connected in sequence. Specifically, the multiple sub-drill rods are detachably connected to each other via plug-in joints.

[0033] The winch mechanism 170 includes a winch device 171 and a protective wire rope 172. The winch device 171 is mounted on the frame 110. The protective wire rope 172 is hung on the top end beam 131, with one end wound around the winch device 171 and the other end connected to the grouting device 150.

[0034] The hollow power head 180 is slidably mounted on the column mechanism 130. The hollow drive shaft of the hollow power head 180 is sleeved on the drill rod 140. The inner wall of the hollow drive shaft has a mating part.

[0035] The drill rod drive unit 190 is connected to the hollow power head 180 and is used to drive the hollow power head 180 to move along the first direction 10. The first direction 10 is consistent with the longitudinal direction of the polished drill rod 140. When the screw-type pile-forming equipment is located on a horizontal plane, if the threaded drill rod 160 and the polished drill rod 140 are in an upright state, the first direction 10 is the vertical direction; if the threaded drill rod 160 and the polished drill rod 140 are in a horizontal state, the first direction 10 is the horizontal direction.

[0036] The hollow power head 180 is configured to drive the hollow transmission shaft to rotate, and continue to rotate after the mating part and the holding part are locked together to drive the sprue drill rod 140 to rotate, or until the mating part and the guide slide part cooperate with each other and the hollow power head 180 can slide relative to the sprue drill rod 140 along the first direction 10.

[0037] When the mating part and the holding part are locked together, the slick drill rod 140 can be fixed in the hollow drive shaft of the hollow power head 180, and the transmission connection between the two can be realized. When the mating part and the guide slide part are mated or aligned, the hollow power head 180 can slide relative to the slick drill rod 140 in the first direction 10. At this time, there is a gap between the slick drill rod 140 and the hollow drive shaft of the hollow power head 180, and the mating part can slide back and forth on the guide slide part.

[0038] In actual use, the hollow power head 180 can drive the hollow transmission shaft to rotate in the forward and reverse directions, and the drill rod drive component 190 can drive the hollow power head 180 to move up and down in the first direction 10, so as to adjust the position of the hollow power head 180 on the polished drill rod 140.

[0039] When drilling is required before pile driving, the hollow power head 180 is first adjusted to the lower end of the smooth drill rod 140. Then, the hollow power head 180 drives the hollow transmission shaft to rotate forward until the mating part and the clamping part are locked together. After that, the hollow transmission shaft continues to rotate forward to drive the smooth drill rod 140 and the threaded drill rod 160 to rotate. At the same time, the drill rod drive component 190 drives the hollow power head 180 to move the smooth drill rod 140 downward in the first direction 10, and the winch device 171 simultaneously and slowly releases the line to realize the drilling work of the threaded drill rod 160. When all or at least most of the threaded drill rod 160 is below the ground, the position of the hollow power head 180 on the smooth drill rod 140 is adjusted upward by a certain distance, and the drilling action is repeated. This process is repeated until the pile hole of the preset depth is obtained.

[0040] When it is necessary to lift the drill bit after drilling, the hollow power head 180 drives the hollow transmission shaft to rotate in the opposite direction until the mating part and the clamping part are locked together. Then, the hollow transmission shaft is driven to continue rotating in the opposite direction to drive the smooth drill rod 140 and the threaded drill rod 160 to rotate. At the same time, the drill rod drive component 190 drives the hollow power head 180 to move the smooth drill rod 140 upward in the first direction 10, and the winch device 171 simultaneously and slowly retracts the wire to lift the threaded drill rod 160 and the smooth drill rod 140 upward. After the hollow power head 180 rises to a certain height, the position of the hollow power head 180 on the smooth drill rod 140 is adjusted downward by a certain distance, and the above-mentioned lifting action is repeated until the threaded drill rod 160 is completely lifted out of the pile hole.

[0041] It should be noted that during the upward lifting of the threaded drill rod 160, the hollow power head 180 may not be working, thus forming a smooth pile; the hollow power head 180 may also drive the smooth drill rod 140 to rotate in the opposite direction, and the reverse rotation speed is basically the same as the rotation speed during drilling, thus forming a threaded pile.

[0042] Therefore, in the process of drilling deep piles, the screw-type composite pile-forming equipment 100 adjusts the position of the hollow power head 180 on the smooth drill rod 140 to ensure that the hollow power head 180 maintains a low center of gravity on the column mechanism 130 throughout the drilling process. This solves the problem of equipment swaying or tipping due to the excessively high center of gravity of the threaded drill rod 160 power head during the drilling process of deep piles, and improves the equipment stability and safety of the screw-type composite pile-forming equipment 100 in the process of drilling deep piles.

[0043] In some embodiments, the sidewall of the sprue drill rod 140 includes an arcuate surface serving as a holding portion and a groove formed on the arcuate surface as a guide slide portion. A protruding ridge serving as a mating portion is formed on the inner wall of the hollow drive shaft of the hollow power head 180. The hollow power head 180 is configured to drive the hollow drive shaft to rotate until the protruding ridge and the arcuate surface are locked together or the protruding ridge is completely located within the groove. Specifically, when the protruding ridge and the arcuate surface are locked together, the sprue drill rod 140 is locked within the hollow drive shaft to facilitate driving the sprue drill rod 140 to rotate the threaded drill rod 160; when the protruding ridge is completely located within the groove, the protruding ridge can slide within the groove along the first direction 10, and at this time, the hollow power head 180 can slide up and down on the sprue drill rod 140 along the first direction 10 under the driving action of the drill rod drive member 190. Specifically, the groove is an elongated groove extending along the longitudinal direction of the drill rod 140, and the ridge is a strip-shaped block extending along the longitudinal direction of the drill rod 140. Of course, in other embodiments, the holding part can also be a protruding structure on both sides of the groove, as long as it can be locked with the protruding structure after the ridge is misaligned with the groove.

[0044] Thus, during the processing of the slick drill rod 140, it is only necessary to open a groove on the side wall of the slick drill rod 140 to form a clamping part and a guide slide on the side wall of the slick drill rod 140. A protruding ridge is fixed or processed on the inner wall of the hollow drive shaft of the hollow power head 180 to form a mating part on the inner wall of the hollow drive shaft, thereby making the manufacturing of the screw-type composite pile-forming equipment 100 relatively simple.

[0045] In other embodiments, the drill rod 140 has multiple arc-shaped slots (not shown) spaced apart along its longitudinal direction as holding parts, and the sidewalls of the drill rod 140 without arc-shaped slots serve as guide slides. The extension direction of the arc-shaped slots is consistent with the circumferential direction of the drill rod 140. The inner wall of the hollow drive shaft of the hollow power head 180 has a retractable key (not shown) in the diametrical direction. When the hollow power head 180 moves to the position where the drill rod 140 has arc-shaped slots under the driving action of the drill rod drive member 190, the hollow power head 180 drives the hollow drive shaft to rotate forward or backward, so as to screw the slots into the arc-shaped slots and drive the drill rod 140 to rotate, or to screw the key out of the arc-shaped slots.

[0046] In some embodiments, the screw-type composite pile-forming device 100 further includes a chain drive assembly 201. The chain drive assembly 201 includes a drive chain 2011, a drive sprocket 2012, a first lifting sprocket 2013, a second lifting sprocket 2014, a third lifting sprocket 2015, a first pressing sprocket 2016, a second pressing sprocket 2017, and a third pressing sprocket 2018. The drive sprocket 2012 is drively connected to the output end of the drill pipe drive component 190. The first lifting sprocket 2013, the first pressing sprocket 2016, and the second pressing sprocket 2017 are spaced apart and mounted on the frame 110. The second lifting sprocket 2014 is mounted on the loading end beam 132. The third lifting sprocket 2015 and the third pressing sprocket 2018 are respectively mounted on the end of the hollow power head 180 facing the top end beam 131 and the end facing away from the top end beam 131. One end of the transmission chain 2011 is fixed to the loading end beam 132, and the other end is sequentially wound around the third lifting sprocket 2015, the second lifting sprocket 2014, the first lifting sprocket 2013, the power sprocket 2012, the first pressing sprocket 2016, the second pressing sprocket 2017 and the third pressing sprocket 2018, and is fixedly connected to the frame 110.

[0047] The chain drive assembly 201 has the advantages of high transmission efficiency, accurate transmission ratio, strong overload capacity, and reduced cost. Therefore, the chain drive assembly 201 realizes the transmission connection between the drill rod drive component 190 and the hollow power head 180, which makes the transmission efficiency between the drill rod drive component 190 and the threaded drill rod 160 high. This not only reduces the manufacturing cost of the screw-type composite pile-forming equipment 100, but also extends the service life of the screw-type composite pile-forming equipment 100 and improves the safety of use.

[0048] Furthermore, the chain drive assembly 201 can enhance the effect of the drill rod drive component 190 on the hollow power head 180, thereby increasing the loading force on the threaded drill rod 160 under the action of the hollow power head 180. This enables the screw-type composite pile-forming equipment 100 to perform drilling and pile-forming operations on relatively hard geological conditions (such as rock layers), thus improving the applicability of the screw-type composite pile-forming equipment 100.

[0049] In practical applications, when the threaded drill rod 160 needs to drill downwards, the drill rod drive component 190 drives the power sprocket 2012 to rotate forward, so as to pull the hollow power head 180 through the transmission chain 2011 to drive the threaded drill rod 160 to overcome the tension of the protective wire rope 172 and move downwards; when the threaded drill rod 160 needs to be lifted, the drill rod drive component 190 drives the power sprocket 2012 to rotate in the opposite direction, so as to pull the hollow power head 180 upwards through the transmission chain 2011, so that the threaded drill rod 160 overcomes its own weight, the weight of the hollow power head 180 and the weight of the polished drill rod 140 and moves upwards, realizing the upward movement of the spiral drill rod.

[0050] The drive chain 2011 pulls the hollow power head 180 downward or upward, which is achieved by the drill rod drive component 190 driving the power sprocket 2012 to rotate forward or in reverse.

[0051] Furthermore, in some embodiments, there are two chain drive assemblies 201. The drill rod drive 190 is a dual-output shaft drive mechanism. The two output shafts of the drill rod drive 190 are respectively connected to two power sprockets 2012. The two chain drive assemblies 201 are spaced apart along a second direction perpendicular to the first direction 10. When the screw-type composite pile-forming device 100 is located in a horizontal plane, the second direction is a horizontal direction perpendicular to the first direction 10, specifically the left-right direction of the frame 110. The dual-output shaft drive mechanism can be a dual-output shaft motor or a power assembly consisting of a drive motor and a dual-output shaft reducer.

[0052] Therefore, by setting two chain drive components 201, the hollow power head 180 has two force points at both its top and bottom. After the two chain drive components 201 transmit the power of the drill rod drive component 190 to the hollow power head 201, the rising and falling process of the hollow power head 201 is more stable. This reduces the probability of shaking or swaying of the slick drill rod, hollow power head, and threaded drill rod during drilling and hoisting, thereby improving the piling reliability and safety of the screw-type composite piling equipment 100.

[0053] The drill pipe drive component 190 is configured as a dual output shaft drive mechanism to ensure that the two power sprockets 2012 rotate synchronously, thereby ensuring that the connection between the hollow power head 180 and the two transmission chains 2011 is synchronously stressed, so as to further ensure that the hollow power head 180 can rise and fall smoothly.

[0054] The hollow power head 180 drives the threaded drill rod 160 to descend or ascend, and this is achieved by two drill rod drive components 190, realizing dual power drive. This can improve the drilling force of the threaded drill rod 160 and meet the power requirements for lifting the large threaded drill rod 160, enabling the screw-type composite pile-forming equipment 100 to form piles in harder strata and to complete pile-forming work at greater depths.

[0055] In some embodiments, the threaded drill rod 160 includes a rod body (not shown) and threaded teeth (not shown) fixed to the rod body. The threaded teeth are cast from wear-resistant cast steel, and the rod body is a seamless steel tube. Specifically, the threaded teeth can be fixed to the rod body by welding or other methods, or they can be obtained by casting directly onto the rod body. This not only ensures that the threaded drill rod 160 is relatively lightweight, but also improves its wear resistance, effectively extending its service life.

[0056] In some embodiments, the screw-type composite piling equipment 100 further includes a lifting mechanism 202 and a pressurizing mechanism 203. Both the lifting mechanism 202 and the pressurizing mechanism 203 are mounted on the frame 110. The lifting mechanism 202 is used to lift the precast pile from the ground or a specific location and transport it to the pressurizing mechanism 203. The pressurizing mechanism 203 is configured to clamp the precast pile lifted by the lifting mechanism 202 and press the precast pile into the pile hole drilled by the threaded drill rod 160 along a first direction 10.

[0057] In practical applications, the aforementioned screw-type composite pile-forming equipment 100 can select different working modes according to actual needs. When the geological conditions for pile formation are good, the screw-type composite pile-forming equipment 100 can choose not to activate the lifting mechanism 202 and the pressurizing mechanism 203. At this time, only the threaded drill rod 160 can be used for hole formation, and the grouting device 150 can be used to perform grouting work at the same time or after hole formation. At this time, the aforementioned screw-type composite pile-forming equipment 100 can complete the pile formation work of bored cast-in-place piles, squeeze cast-in-place piles, mud-wall bored piles, etc. When the geological conditions for pile formation are poor or complex, the screw-type composite pile-forming equipment 100 can choose to activate the lifting mechanism 202 and the pressurizing mechanism 203.

[0058] For ease of understanding, the following is a brief description of the pile-forming process using the aforementioned screw-type composite pile-forming equipment 100 when the lifting mechanism 202 and the pressurizing mechanism 203 are activated:

[0059] (1) The walking mechanism 120 drives the screw-type composite pile-forming equipment 100 to the designated position;

[0060] (2) The drill rod drive unit 190, hollow power head 180, smooth drill rod 140, threaded drill rod 160 and winch device 171 work together to make the threaded drill rod 160 drill at the pile driving position to obtain a pile hole of a preset depth.

[0061] (3) The grouting device 150 injects a preset amount of mortar or concrete slurry into the pile hole through the inner hole of the smooth drill rod 140 and the threaded drill rod 160. At the same time, the drill rod drive 190, the winch device 171 and the hollow power head 180 are used to pull the threaded drill rod 160 out of the pile hole.

[0062] (4) After the threaded drill rod 160 is completely pulled out of the pile hole, the walking mechanism 120 is used to drive the screw-type composite pile forming equipment 100 to move the pressure mechanism 203 to the top of the pile hole.

[0063] (5) Use the lifting mechanism 202 to lift the precast pile from the ground or other specific location to the pressure mechanism 203, and use the pressure mechanism 203 to clamp the precast pile;

[0064] (6) When the precast pile is not aligned with the pile hole, the screw-type composite pile forming equipment 100 can be moved by the walking mechanism 120 until the precast pile is aligned with the pile hole.

[0065] (7) Use the pressurizing mechanism 203 to press the precast pile into the pile hole until the bottom end of the precast pile reaches the bottom of the pile hole, and squeeze the mortar or concrete slurry in the pile hole to the inner wall of the pile hole and between the precast pile, and let it stand to form a pile.

[0066] It should be noted that the order of the steps in the above steps is not limited and can be freely adjusted according to the actual situation on the construction site, as long as the pile driving work can be completed simply and efficiently.

[0067] Therefore, the aforementioned screw-type composite pile-forming equipment 100 is a composite pile-forming device that combines screw pile technology, grouting technology, and static pressure pile technology, and is applicable to pile-forming work for various types of piles. In the process of precast pile formation, since the threaded drill rod 160 only needs to drill holes and does not require grouting simultaneously, even in complex pile-forming conditions such as hard strata, large pile depths, and soft soil foundations, the drilling work can still be completed smoothly. During grouting, only a certain amount of mortar or concrete slurry is injected into the bottom of the pile hole to prevent loose soil around the pile hole from filling the hole during drill lifting, thus preventing insufficient hole depth. Since the threaded drill rod 160 has already completed the lifting action and does not need to fill the pile hole completely, the grouting work is less difficult, and the probability of mud contamination is also reduced. Because the precast pile is directly pressed into the mortar or concrete slurry in the pile hole, the pile-forming difficulty can be further reduced. The combination of precast piles and mortar or concrete slurry can improve the bearing capacity of a single pile. Therefore, the aforementioned screw-type composite pile-forming equipment 100 can be used for pile forming under complex geological conditions such as sand layers, gravel, round gravel, strongly weathered layers, and moderately weathered layers. It features no mud (or very little mud) during the hole-forming and pile-forming process, no noise, no sediment, high pile bearing capacity, good pile quality, low pile cost, high pile efficiency, and is more environmentally friendly. It can also meet the construction operation needs under various complex geological conditions.

[0068] Further, in some embodiments, the pressurizing mechanism 203 includes an upper clamping structure 2031, a lower clamping structure 2032, and a pressurizing lifting structure 2033. The upper clamping structure 2031 has a first clamping portion (not shown) for clamping the precast pile. The lower clamping structure 2032 has a second clamping portion (not shown) for clamping the precast pile. The lower clamping structure 2032 is mounted on the frame 110 and spaced apart from the upper clamping structure 2031, aligning the first and second clamping portions. The size of both the first and second clamping portions is adjustable. The pressurizing lifting structure 2033 connects the upper clamping structure 2031 and the lower clamping structure 2032 and provides a driving force that causes the upper clamping structure 2031 to move up and down in a direction toward or away from the lower clamping structure 2032.

[0069] The pressurized lifting structure 2033 can be an electric cylinder, a hydraulic cylinder, a scissor lift structure, or a lifting structure composed of a multi-link mechanism and a power structure, etc. Specifically, in this embodiment, the pressurized lifting structure 2033 is a hydraulic cylinder. More specifically, there are multiple hydraulic cylinders, which are arranged parallel and spaced apart along the circumference of the lower clamping structure 2032 to provide sufficient power for the pressing of the precast pile while ensuring the smooth lifting of the upper clamping structure 2031. Both the upper clamping structure 2031 and the lower clamping structure 2032 are mechanisms for clamping and fixing the working tool (i.e., the precast pile), and can be multi-link mechanisms, multi-jaw structures, cross-fixing mechanisms, clamp mechanisms, spring mechanisms, etc.

[0070] In practical applications, when it is necessary to press a precast pile into the mortar or concrete grout inside a large pile hole, the second clamping part is first enlarged to loosen the precast pile. Then, the pressure lifting structure 2033 drives the upper clamping structure 2031 to move the precast pile downwards until the upper clamping structure 2031 moves close to the lower clamping structure 2032. At this point, the second clamping part is reduced to clamp the precast pile onto the lower clamping structure 2032. Then, the upper clamping structure 2031 loosens the precast pile by enlarging the first clamping part. The pressure lifting structure then... 2033 drives the upper clamping structure 2031 to move upward, thereby resetting the upper clamping structure 2031. Then, the steps of lower clamping structure 2032 releasing the precast pile, pressure lifting structure 2033 driving upper clamping structure 2031 to move the precast pile downward, lower clamping structure 2032 clamping the precast pile, upper clamping structure 2031 releasing the precast pile, and pressure lifting structure 2033 driving upper clamping structure 2031 to move upward are repeated until the precast pile is pressed into the preset depth in the large pile hole, thus completing the pile driving operation. The whole process is stable and reliable.

[0071] Furthermore, in some embodiments, the pressurizing mechanism 203 further includes an upper clamping drive (not shown) and a lower clamping drive (not shown). The upper and lower clamping drive are respectively connected to the upper clamping structure 2031 and the lower clamping structure 2032 for transmission, and are used to drive the upper clamping structure 2031 to adjust the size of the first clamping part, and to drive the lower clamping structure 2032 to adjust the size of the second clamping part. In this way, the upper and lower clamping drive can realize the automatic adjustment of the size of the first and second clamping parts, saving time and effort, and further reducing the difficulty of pile construction.

[0072] Furthermore, in some embodiments, the pressurizing mechanism 203 further includes a controller (not shown), which is electrically connected to the pressurizing lifting structure 2033, the upper clamping drive, and the lower clamping drive, and is used to control the pressurizing lifting structure 2033, the upper clamping drive, and the lower clamping drive to operate according to preset instructions, so as to switch the working state of the pressurizing mechanism 203 to clamping mode, pressing mode, or reset mode. When the pressurizing mechanism 203 is in clamping mode, both the upper clamping drive and the lower clamping drive are in the activated state, and the pressurizing lifting structure 2033 is in the stopped working state. When the pressurizing mechanism 203 is in pressing mode, the upper clamping drive is in the activated state, the pressurizing lifting structure 2033 is in the first working state of driving the upper clamping structure 2031 to move in the direction toward the lower clamping structure 2032, and the lower clamping drive is in the stopped working state. When the pressurizing mechanism 203 is in the reset mode, the lower clamping drive is in the start state, the upper clamping drive is in the stop working state, and the pressurizing lifting structure 2033 is in the second working state of driving the upper clamping structure 2031 to move in the direction away from the lower clamping structure 2032.

[0073] The controller can be independent of the vehicle control system, serving as a dedicated structure for the pressurizing mechanism 203, or it can be part of the vehicle control system. The controller allows the pressurizing mechanism 203 to freely switch between clamping, pressing, and reset modes, eliminating the need for manual intervention in the entire precast pile pressing operation. This further enhances the automation level of the screw-type composite pile forming equipment 100, leading to even greater construction efficiency.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A screw-type composite pile-forming device, characterized in that, include: frame; A walking mechanism is located at the bottom of the frame; A column mechanism having a loading end beam and a top end beam; the end of the column mechanism away from the top end beam is mounted on the frame; The hollow rod-shaped sprue drill rod has a retaining part and a guide sliding part on its side wall; the sprue drill rod is slidably mounted on the column mechanism; The grouting device is fixed and connected at one end to the end of the ballast drill rod near the top end beam; A hollow rod-shaped threaded drill rod, one end of which is coaxially connected to the end of the polished drill rod away from the top end beam; The winch mechanism includes a winch device and a protective steel wire rope; the winch device is installed on the frame; the protective steel wire rope is hung on the top end beam, with one end wound around the winch device and the other end connected to the grouting device. A hollow power head is slidably mounted on the column mechanism; the hollow drive shaft of the hollow power head is sleeved on the drill rod; the inner wall of the hollow drive shaft has a mating part; A drill rod drive unit is connected to the hollow power head for transmission and is used to drive the hollow power head to move along a first direction; the first direction is consistent with the longitudinal direction of the ballast drill rod. The hollow power head is configured to drive the hollow transmission shaft to rotate until the mating part and the holding part are locked together, and then continue to rotate to drive the sprue drill rod to rotate, or until the mating part and the guide slide part cooperate with each other and the hollow power head can slide relative to the sprue drill rod in the first direction.

2. The screw-type composite pile-forming equipment according to claim 1, characterized in that, The sidewall of the sprue includes an arcuate surface serving as the holding part and a groove formed on the arcuate surface as the guide slide part; a protruding ridge serving as a mating part is formed on the inner wall of the hollow drive shaft of the hollow power head; the hollow power head is configured to drive the hollow drive shaft to rotate until the protruding ridge and the arcuate surface are locked together or the protruding ridge is completely located in the groove.

3. The screw-type composite pile-forming equipment according to claim 1, characterized in that, It also includes a chain drive assembly; the chain drive assembly includes a drive chain, a drive sprocket, a first lifting sprocket, a second lifting sprocket, a third lifting sprocket, a first pressing sprocket, a second pressing sprocket, and a third pressing sprocket; the drive sprocket is drive-connected to the output end of the drill pipe drive component; the first lifting sprocket, the first pressing sprocket, and the second pressing sprocket are spaced apart and mounted on the frame; the second lifting sprocket is mounted on the loading end beam; the third lifting sprocket and the third pressing sprocket are respectively mounted on the end of the hollow power head facing the top end beam and the end facing away from the top end beam; one end of the drive chain is fixed to the loading end beam, and the other end is sequentially wound around the third lifting sprocket, the second lifting sprocket, the first lifting sprocket, the drive sprocket, the first pressing sprocket, the second pressing sprocket, and the third pressing sprocket, and is fixedly connected to the frame.

4. The screw-type composite pile-forming equipment according to claim 3, characterized in that, There are two chain drive assemblies; the drill rod drive is a dual-output shaft drive mechanism; the two output shafts of the drill rod drive are respectively connected to the two power sprockets; the two chain drive assemblies are spaced apart along a second direction perpendicular to the first direction.

5. The screw-type composite pile-forming equipment according to claim 1, characterized in that, The threaded drill rod includes a rod body and threaded teeth fixed to the rod body; the threaded teeth are made of wear-resistant cast steel, and the rod body is a seamless steel pipe.

6. The screw-type composite pile-forming equipment according to claim 1, characterized in that, The walking mechanism is a walking structure.

7. The screw-type composite pile-forming equipment according to claim 1, characterized in that, It also includes a lifting mechanism and a pressurizing mechanism; both the lifting mechanism and the pressurizing mechanism are mounted on the frame; the pressurizing mechanism is configured to clamp the precast pile lifted by the lifting mechanism and press the precast pile into the pile hole drilled by the threaded drill rod along the first direction.

8. The screw-type composite pile-forming equipment according to claim 7, characterized in that, The pressurizing mechanism includes an upper clamping structure, a lower clamping structure, and a pressurizing lifting structure; the upper clamping structure has a first clamping part for clamping the precast pile; the lower clamping structure has a second clamping part for clamping the precast pile; the lower clamping structure is mounted on the frame and spaced apart from the upper clamping structure, so that the first clamping part and the second clamping part are aligned; the size of both the first clamping part and the second clamping part is adjustable; The pressurized lifting structure is connected between the upper clamping structure and the lower clamping structure, and is used to provide a driving force that causes the upper clamping structure to move up and down in a direction toward or away from the lower clamping structure.

9. The screw-type composite pile-forming equipment according to claim 8, characterized in that, The pressurizing mechanism further includes an upper clamping drive and a lower clamping drive; the upper clamping drive and the lower clamping drive are respectively connected to the upper clamping structure and the lower clamping structure for transmission, and are used to drive the upper clamping structure to operate to adjust the size of the first clamping part, and to drive the lower clamping structure to operate to adjust the size of the second clamping part.

10. The screw-type composite pile-forming equipment according to claim 9, characterized in that, The pressurizing mechanism also includes a controller, which is electrically connected to the pressurizing lifting structure, the upper clamping drive, and the lower clamping drive, and is used to control the pressurizing lifting structure, the upper clamping drive, and the lower clamping drive to operate according to preset instructions, so as to switch the working state of the pressurizing mechanism to clamping mode, pressing mode, or reset mode; when the pressurizing mechanism is in clamping mode, the upper clamping drive and the lower clamping drive are both in the start state, and the pressurizing lifting structure is in the stop working state; When the pressurizing mechanism is in the pressing mode, the upper clamping drive is in the start state, the pressurizing lifting structure is in the first working state of driving the upper clamping structure to move in the direction toward the lower clamping structure, and the lower clamping drive is in the stopped working state. When the pressurizing mechanism is in the reset mode, the lower clamping drive is in the start state, the upper clamping drive is in the stop state, and the pressurizing lifting structure is in the second working state of driving the upper clamping structure to move in a direction away from the lower clamping structure.

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