Movable piling type rod pit excavator

Abstract

The invention relates to the technical field of excavating mechanical equipment, in particular to a movable piling type rod pit excavator which comprises a carrying mechanism, a piling head mechanism, a power mechanism and a piling support. The piling head mechanism comprises an upper structure, a counterweight structure and a cutting edge structure from top to bottom; the lower end of the upper structure is fixedly connected with the upper end of the counterweight structure; the lower end of the counterweight structure is fixedly connected with a counterweight chassis, a counterweight block is arranged in the counterweight structure, and the lower end of the counterweight chassis is fixedly connected with the upper end of the cutting edge structure; the cutting edge structure comprises two or more arc-shaped blades which define a circle, a spoke wheel structure is connected between every two arc-shaped blades, and the central connecting rod penetrates through the upper structure, the counterweight structure and an open hole in the center of the spoke wheel structure; the power mechanism comprises a winch. The movable piling type rod pit excavator is reasonable in structure, convenient to operate, high in efficiency and good in accuracy, and has good application value in engineering construction and other industries.

Description

Technical Field

[0001] The invention relates to the technical field of excavating mechanical equipment, in particular to a mobile pile-driving pole pit excavator. Background Art

[0002] In the daily line engineering construction process, digging the pole foundation pit (hereinafter referred to as the pole pit) is an indispensable step. Digging pole pits has long been a time-consuming and labor-intensive task. Due to the current tight channel for new lines, there are many 10 kV multi-circuit lines on the same tower used near the county substation exit, and steel pipe poles are mostly used at the terminals or corners. Generally, the pole pit for double-circuit steel pipe poles on the same tower is about 6 meters deep and 2.5 meters in diameter, and the pole pit for cast-in-place piles of four-circuit steel pipe poles on the same tower is about 8 meters deep and 3 meters in diameter. The current conventional excavation method is mechanical excavation within 3 meters below the ground, and manual excavation below 3 meters. The manual excavation method not only wastes manpower and time, but also has a wide range of soil excavation during the excavation process, and the surrounding soil is easy to loosen and fall, which not only affects the progress of the work, but also poses a safety hazard.

[0003] In addition to the conventional methods mentioned above, rotary drilling rigs can also be used to dig the pole pit. However, rotary drilling rigs are very suitable for soft soil and ordinary soil, but not for hard soil and gravel hard soil. The spiral drill bit cannot operate normally and is prone to collapse and deformation.

[0004] A four-circuit line with the same tower has more than a dozen steel pipe poles, or as few as seven or eight. Excavating the pole pits at the same time requires a large number of workers, and the excavation in turns takes a long time. Combining the working principle of the Luoyang shovel and the working method of the civilian well-drilling team in the past century, in order to effectively solve the problems of low time efficiency, slow project progress, and high manpower investment in conventional pole pit excavation, the present invention proposes to develop a pile-driving pole pit excavation device to improve work efficiency.

[0005] Therefore, a mobile pile-driving pole pit excavator is now designed to effectively solve the above problems. Summary of the invention

[0006] Aiming at the shortcomings of the prior art, a mobile pile-driving pole pit excavator is designed.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a mobile pile-driving pole pit excavator, including a carrying mechanism, a pile driving head mechanism, a power mechanism, and a pile driving bracket, wherein the carrying mechanism includes an engine; The pile driving head mechanism comprises an upper structure, a counterweight structure and a cutting edge structure from top to bottom, the outer wall of the upper structure is fixedly connected with a fixed handrail by bolts, and the lower end of the upper structure is fixedly connected with the upper end of the counterweight structure; The lower end of the counterweight structure is fixedly connected to a counterweight chassis, a counterweight block is arranged inside the counterweight structure, and the lower end of the counterweight chassis is fixedly connected to the upper end of the blade structure; The blade structure includes two or more arc-shaped blades forming a circle, a spoke wheel structure is connected between each arc-shaped blade, a central connecting rod passes through the upper structure, the counterweight structure, and the central opening of the spoke wheel structure, and the lower end is locked by a nut, a first spring is sleeved outside the central connecting rod between the upper structure and the counterweight structure; a second spring is sleeved outside the central connecting rod between the counterweight structure and the spoke wheel structure; A fixing nut is screwed onto the upper end of the central connecting rod, and a lifting ring is fixedly connected to the central connecting rod; The power mechanism comprises a winch, which is fixedly mounted on a side of the piling support away from the piling head mechanism.

[0008] Preferably, the lower end of the piling support is configured as a triangular structure at both ends, with a crossbeam in the middle.

[0009] Preferably, the side wall of the cutting edge structure is provided with an opening to facilitate lifting and movement.

[0010] Preferably, the lower end of the counterweight chassis is fixedly connected to a support rod, the lower end of the support rod is fixedly connected to a support plate, and the lower end of the support plate is fixedly connected to the upper end of the cutting edge structure.

[0011] Preferably, a speed reducer is provided inside the winch, and the winch is connected to the engine of the carrying mechanism via a belt.

[0012] Preferably, the carrying mechanism adopts a diesel engine, which is suitable for outdoor use in sites without power supply.

[0013] Preferably, the winch is connected to the lifting ring through a steel cable, and the pile driving head mechanism can be lifted, braked, and freely fall by operating the winch.

[0014] Preferably, the blade structure has a diameter of 0.8-1 meter and a height of 1-1.2 meters.

[0015] Preferably, the weight of the pile driving head mechanism is 0.5-1 m, and the hoisting height of the winch is 1-2 m.

[0016] In order to reduce the rebound force of the pile driving head on the steel wire rope after the free fall movement, the present invention installs a first spring on the upper part of the pile driving head counterweight. In order to make the cutting edge of the pile driving head fully open during the falling process, a second spring is installed between the central connecting rod of the cutting edge and the counterweight. At the same time, in order to make the pile driving head able to lift the soil during the rising process, the central connecting rod passes through the opening in the center of the upper structure, the counterweight structure, and the spoke wheel structure, and the central connecting rod of the pile driving head is directly connected to the spoke wheel structure between the arc blade of the blade structure, so that the cutting edge of the arc blade can be slightly closed during the lifting process of the pile driving head, thereby lifting the soil above the ground.

[0017] It can be seen from the overall structure diagram of the pile driver that when the pile driver is lifted above the ground, the height of the engagement diagram in the blade is about 0.3 meters and the diameter is about 0.7 meters. At this time, the pile driver is hooked to the side of the pole pit and dropped to the ground. Because the pile driver lifting rod is no longer subject to tension, the second spring can open the blade. At this time, the pile driver is lifted and shaken to make the grabbed soil fall down and thus pull the soil away.

[0018] In order to stabilize the pile driving head on the carrying structure frame, two square holes are cut on each side of the blade structure of the pile driving head, and the pile driving head can be cross-armed on the frame through two steel pipes.

[0019] After testing, it was found that the pile driving head and the frame were firmly fixed and met the transportation requirements; during the lifting process, the pile driving head could grab the soil excavated from the pole pit and bring it to the surface, avoiding manual digging; during the excavation of the pole pit, the pile driving head would increase the excavation efficiency due to the increase in the depth of the pole pit and the increase in gravitational potential energy during free fall.

[0020] Beneficial effects of the present invention: 1. The structural design of the present invention is reasonable. Through the coordinated action of the carrying mechanism, the pile driving head mechanism and the power mechanism, fast and accurate pile driving operation on the ground can be achieved, thereby improving work efficiency.

[0021] 2. By setting the upper structure, counterweight structure, blade structure, etc., stability during piling can be achieved, deviation during excavation can be reduced, and the accuracy of piling can be improved.

[0022] 3. Through the design of the winch, the lifting, braking, free fall and other operations of the pile driving head mechanism can be easily realized, which improves the convenience of the operation.

[0023] 4. Through the design of the reducer and steel cable, the speed and position of the pile driving head mechanism can be adjusted, making the operation more flexible.

[0024] 5. Through the design of lifting rings, fixed handrails, etc., the pile driving head mechanism can be easily fixed and carried, which improves the mobility of the equipment.

[0025] In general, the present invention provides a mobile pile-driving pole pit excavator with reasonable structure, convenient operation, high efficiency and good accuracy, which has great application value for industries such as engineering construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 It is a schematic diagram of the structure of the pile driving head mechanism of the present invention; Figure 2 It is a schematic diagram of the spoke wheel structure of the present invention.

[0028] Figure 3 This is a schematic diagram of the excavation working state of the present invention.

[0029] In the figure: 1. counterweight structure; 2. upper structure; 3. blade structure; 4. carrying mechanism; 5. piling bracket; 6. rod pit; 101. counterweight chassis; 102. support rod; 201. fixed handrail; 202. bolt; 203. first spring; 204. fixing nut; 205. lifting ring; 301. support plate; 302. second spring; 303. central connecting rod; 304. through hole; 305. spoke wheel structure; 41. winch. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Embodiment:

[0031] like Figure 1-Figure 3 As shown, a mobile pile-driving pole pit excavator according to the present invention comprises a carrying mechanism 4, a pile driving head mechanism, a power mechanism, and a pile driving bracket 5, wherein the carrying mechanism 4 includes an engine inside; The pile driving head mechanism comprises an upper structure 2, a counterweight structure 1, and a blade structure 3 from top to bottom. The outer wall of the upper structure 2 is fixedly connected with a fixed handrail 201 by bolts 202, and the lower end of the upper structure 2 is fixedly connected with the upper end of the counterweight structure 1; The counterweight structure 1 is fixedly connected to a counterweight chassis 101 at the lower end, a counterweight block is arranged inside the counterweight structure 1, and the lower end of the counterweight chassis 101 is fixedly connected to the upper end of the blade structure 3; The blade structure 3 includes two arc-shaped blades forming a circle, and a spoke wheel structure 305 is connected between each arc-shaped blade. A central connecting rod 303 passes through the upper structure 2, the counterweight structure 1, and the central opening of the spoke wheel structure 305, and the lower end is locked by a nut. A first spring 203 is provided between the upper structure 2 and the counterweight structure 1 and is sleeved outside the central connecting rod 303; a second spring 302 is provided between the counterweight structure 1 and the spoke wheel structure 305 and is sleeved outside the central connecting rod 303; The upper end of the central connecting rod 303 is screwed with a fixing nut 204, and the central connecting rod 303 is fixedly connected with a lifting ring 205; The power mechanism comprises a winch 41 , which is fixedly mounted on a side of the piling support 5 away from the piling head mechanism.

[0032] The carrying mechanism 4 can be a four-wheel or three-wheel diesel vehicle, and the winch, pile driving head mechanism, and pile holding bracket are transported by the four-wheel or three-wheel diesel vehicle, which is suitable for field complex terrain pole tower piling, does not require electricity, and the pile driving bracket can be erected on the spot. The winch can be fixedly installed on the diesel vehicle, or fixed on the ground, and the steel cable is reeled in by the winch, so that the pile driving head can be driven from a high place to the ground, thereby improving the efficiency and accuracy of piling. According to the working environment and actual needs, the carrying mechanism 4 can be a diesel tricycle or other suitable carrier, and the engine can be a diesel engine or other suitable power source. The pile driving head mechanism comprises an upper structure 2, a counterweight structure 1, and a blade structure 3 from top to bottom; a first spring 203 is arranged at the center of the lower end of the upper structure 2, and the arrangement of the first spring 203 can effectively reduce the rebound force of the pile driving head mechanism on the steel cable on the lifting ring 205 after the free fall movement, and can reduce the wear of the steel cable and increase its service life; the outer wall of the upper structure 2 is fixedly connected with a fixed handrail 201 by bolts 202, and the arrangement of the fixed handrail 201 makes it more convenient and safe for the operator to move and operate the pile driving head mechanism 2; The lower end of the upper structure 2 is fixedly connected to the upper end of the counterweight structure 1. The existence of the counterweight structure 1 can increase the weight of the pile driving head mechanism 2, so that the force can be better transmitted to the blade structure 3 during the pile driving process, thereby improving the pile driving efficiency; The counterweight chassis 101 is fixedly connected to the lower end of the counterweight structure 1, and a counterweight block is arranged inside the counterweight structure 1, which provides downward gravitational potential energy for the entire pile driving head mechanism when working; A second spring 302 is arranged outside the central connecting rod 303 of the blade structure 3; the function of the second spring 302 is to enable the blade structure 3 to be fully opened during the falling process, so that the blade structure 3 can better enter the soil and improve the pile driving efficiency; the spoke wheel structure 305 is a connecting rod or connecting spokes, which is fixedly connected to the inner wall of the blade structure 3; since the central connecting rod 303 passes through the upper structure 2, the counterweight structure 1, and the blade structure 3, when the central connecting rod 303 is lifted, the pile driving head mechanism can lift the soil during the rising process, thereby improving the excavation efficiency; the lifting ring 205 at the upper end of the pile driving head mechanism is connected to the steel cable and is directly connected to the connecting rod 303. This design enables the pile driving head mechanism to slightly close the blade structure 3 during the lifting process, thereby lifting the soil above the ground, which is convenient for soil cleaning and transportation.

[0033] The power mechanism comprises a winch 41, which is fixedly connected to a side of the bracket away from the pile driving head mechanism.

[0034] Specifically, the two ends of the bracket are set as triangular structures with a crossbeam in the middle. It can be erected on the construction site, or partially erected on the construction site and partially erected on the carrier frame. The two legs at the upper end of the bracket are welded into a trapezoid to enhance the structural stability. At the same time, the supporting foot section of the bracket is welded with a hollow steel pipe, which can be easily installed and removed from the tricycle. After testing, the bracket is firmly fixed during transportation and will not fall off; the bracket can meet the stability requirements during the lifting test.

[0035] Specifically, a fixing nut 204 is fixedly connected to the upper end of the upper structure 2, and a lifting ring 205 is fixedly connected to the central connecting rod.

[0036] Specifically, the lower end of the counterweight chassis 101 is fixedly connected to the support rod 102 , the lower end of the support rod 102 is fixedly connected to the support plate 301 , and the lower end of the support plate 301 is fixedly connected to the upper end of the cutting edge structure 3 .

[0037] Specifically, a speed reducer is provided inside the winch 41, and the winch 41 is connected to the engine of the carrying mechanism 4 through a belt.

[0038] Specifically, the winch 41 is connected to the lifting ring 205 through a steel cable. After the power is matched, during the excavation of the pole pit, the diesel engine remains in the starting state, and the operations of lifting, braking, free fall, etc. of the pile driving head can be realized by operating the winch 41. When the pile driving head mechanism is lifted above the ground, the height of the engagement diagram in the blade is about 0.3 meters and the diameter is about 0.7 meters. At this time, the pile driving head mechanism is hooked to the side of the rod pit and dropped to the ground. Since the pile driving head lifting rod is no longer subjected to tension, the second spring 302 can open the blade structure 3. At this time, the pile driving head is lifted and shaken, so that the grabbed soil can fall down and the soil can be pulled away.

[0039] After testing, it was found that the pile driving head mechanism and the bracket are firmly fixed and meet the transportation requirements; during the lifting process, the pile driving head mechanism can grab the soil excavated from the pole pit and bring it to the surface, avoiding manual digging; during the excavation process of the pole pit, the pile driving head will increase the excavation efficiency due to the increase in gravitational potential energy during free fall due to the increase in the depth of the pole pit.

[0040] The present invention firstly experiments with digging a branch line cement pole pit, which is 2.8 meters deep and 0.9 meters in diameter, and then experiments with digging a 10 kV same-tower four-circuit tension steel pipe pole pit, which is 3 meters in diameter and 8 meters deep. After on-site trials, 4 people can easily use it, including 1 person on-site to monitor safety, 1 person to operate the winch 41, and 2 people to carry the abandoned soil. Compared with completely manual digging and then lifting, the efficiency is significantly improved.

[0041] The present invention was field tested at the construction site of a new 110 kV Huanhe substation to Xiangshan Road 10 kV four-circuit line project in Baofeng County. First, four construction workers were trained. Then, the construction workers used the test equipment during the excavation of the pole pit for the new line project and recorded the excavation time. The test table is shown in the following table. Mobile Pile Driving Pole Pit Excavator Field Test Sheet

[0042] time Place Pole pit size Total time days August 2018 5# tension steel pipe pole pit on the east side of Xiangshan Road 3 meters in diameter, 8 meters in depth 13 August 2018 10# Straight Steel Pipe Pole Pit on the East Side of Xiangshan Road Diameter 2.8 meters, depth 7 meters 11 August 2018 16# tension steel pipe pole pit on the east side of Xiangshan Road 3 meters in diameter, 8 meters in depth 12.5 September 2018 20# tension steel pipe pole pit on the east side of Xiangshan Road 3 meters in diameter, 8 meters in depth 12 September 2018 21# tension steel pipe pole pit on the east side of Xiangshan Road 3 meters in diameter, 8 meters in depth 12 October 2018 26# Straight steel pipe pole pit on the east side of Xiangshan Road Diameter 2.8 meters, depth 7 meters 10 October 2018 31# tension steel pipe pole pit on the east side of Xiangshan Road 3 meters in diameter, 8 meters in depth 11.5 As can be seen from the table above, with the same manpower, the average time for digging the steel pipe pole pits of 7 10kV four-circuit lines is about 11.7 days, which shortens the time of digging the steel pipe pole pits by 38% compared with the current conventional digging method, and achieves the goal of this activity. If the use of a crane is combined with the use of a crane within three meters below the surface, the efficiency of pole pit excavation will be more effectively improved. At the same time, the construction workers participating in the on-site test all said that the use of new equipment can reduce physical exertion and make the transportation of waste soil safer.

[0043] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "horizontal", "vertical", "top", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A mobile pile-driving pole pit excavator, comprising a carrying mechanism (4), a pile driving head mechanism, a power mechanism, and a pile driving bracket (5), wherein the carrying mechanism (4) includes an engine; characterized in that: The pile driving head mechanism comprises, from top to bottom, an upper structure (2), a counterweight structure (1), and a cutting edge structure (3); the outer wall of the upper structure (2) is fixedly connected to a fixed handrail (201) via bolts (202); and the lower end of the upper structure (2) is fixedly connected to the upper end of the counterweight structure (1); The counterweight structure (1) has a counterweight chassis (101) fixedly connected at its lower end, a counterweight block is arranged inside the counterweight structure (1), and the counterweight chassis (101) has a lower end fixedly connected to an upper end of the cutting edge structure (3); The blade structure (3) comprises two or more arc-shaped blades which are arranged in a circle, and a spoke wheel structure (305) is connected between each of the arc-shaped blades. A central connecting rod (303) passes through an opening in the center of the upper structure (2), the counterweight structure (1), and the spoke wheel structure (305), and the lower end is locked by a nut. A first spring (203) is provided between the upper structure (2) and the counterweight structure (1) and is sleeved outside the central connecting rod (303); and a second spring (302) is provided between the counterweight structure (1) and the spoke wheel structure (305) and is sleeved outside the central connecting rod (303). A fixing nut (204) is screwed onto the upper end of the central connecting rod (303), and a lifting ring (205) is fixedly connected to the central connecting rod (303); The power mechanism comprises a winch (41), and the winch (41) is fixedly mounted on a side of the piling support (5) away from the piling head mechanism.

2. A mobile pile-driving pole pit excavator according to claim 1, characterized in that: The piling support (5) is configured to have a triangular structure at both ends, with a crossbeam arranged in the middle.

3. A mobile pile-driving pole pit excavator according to claim 1, characterized in that: The side wall of the cutting edge structure (3) is provided with an opening to facilitate lifting and movement.

4. A mobile pile-driving pole pit excavator according to claim 1, characterized in that: The lower end of the counterweight chassis (101) is fixedly connected to a support rod (102), the lower end of the support rod (102) is fixedly connected to a support plate (301), and the lower end of the support plate (301) is fixedly connected to the upper end of the cutting edge structure (3).

5. A mobile pile-driving pole pit excavator according to claim 1, characterized in that: A speed reducer is arranged inside the hoist (41), and the hoist (41) is connected to the engine of the carrying mechanism (4) via a belt.

6. A mobile pile-driving pole pit excavator according to claim 1, characterized in that: The carrying mechanism (4) adopts a diesel engine and is suitable for outdoor use in places without power supply.

7. A mobile pile-driving pole pit excavator according to claim 1, characterized in that: The hoist (41) is connected to the lifting ring (205) via a steel cable, and the hoisting, braking, and free-falling of the pile driving head mechanism can be achieved by operating the hoist (41).

8. A mobile pile-driving pole pit excavator according to claim 1, characterized in that: The blade structure (3) has a diameter of 0.8-1 m and a height of 1-1.2 m.

9. A mobile pile-driving pole pit excavator according to claim 1, characterized in that: The weight of the pile driving head mechanism is 0.5-1 kg, and the hoisting height of the winch (41) is 1-2 m.

Images