Numerical control slurry taking equipment for deep foundation pit slurry on construction site

Abstract

The invention relates to numerical control slurry taking equipment for deep foundation pit slurry on a construction site, which is characterized in that a cantilever type telescopic structure is arranged on a hand trolley, consists of a telescopic vertical rod with adjustable height and a telescopic cross rod with extensible length, and can realize hovering at any position; the hoisting mechanism is mounted on the cantilever type telescopic structure, is driven by the dual-mode driving system, and is connected with the slurry taking cylinder through a lifting cable; the dual-mode driving system comprises a servo driving module powered by a lithium battery and a replaceable large-torque electric drill semi-electric driving mode; the depth metering unit is composed of a meter counting wheel and a real-time display instrument, the meter counting wheel is pressed on the lifting cable, the moving value of the lifting cable is displayed on the display instrument in real time, and therefore visual metering is achieved; and the safety device comprises a travel switch fixed on the telescopic cross rod and a contact block capable of sliding on the cable. The device is simple in structure, portable, easy to operate and reliable in operation, the adaptability of detection work is improved, the edge risk of operators is avoided, and the labor intensity is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of deep foundation pit engineering detection equipment, specifically a multi-functional integrated device integrating numerical control slurry sampling, in-situ parameter detection and safety protection. It is applicable to on-site deep foundation pit slurry sampling in construction, geological exploration, etc., can sample at different specified depths, and the extracted samples can be used for later detection. Background Art

[0002] In building construction, deep foundation pit projects are often encountered. During the construction process, it is often necessary to detect some parameters of the slurry, such as: pH value, calcium ion, density, viscosity, sand content, colloid rate, acidity and alkalinity, chloride ion, sulfate ion, etc. The detection of these different parameters is of great significance for deep foundation pit construction:

[0003] 1. Ensure the quality of hole formation: By detecting and adjusting parameters such as slurry density, viscosity, sand content, and colloid rate, it can be ensured that the slurry has good hole protection performance, prevent the collapse of the hole wall, and ensure that the shape and size of the formed hole meet the design requirements, creating good conditions for the subsequent placement of the steel reinforcement cage and concrete pouring.

[0004] 2. Protect construction equipment: Understanding parameters such as the sand content and acidity and alkalinity of the slurry can take corresponding measures to reduce the wear and corrosion of the slurry on construction equipment, extend the service life of the equipment, and reduce the equipment maintenance cost.

[0005] 3. Ensure project safety: Appropriate slurry parameters help maintain the stability of the deep foundation pit, prevent safety accidents such as collapse and water inrush, and ensure the life safety of construction personnel and the smooth progress of the project.

[0006] 4. Control project quality: The various parameters of the slurry water will affect the friction between the concrete and the soil around the pile, the integrity of the pile body, etc., and thus affect the quality of the entire deep foundation pit support structure and foundation project. By detecting and adjusting the slurry parameters, the project quality can be ensured to meet the design requirements.

[0007] 5. Protect the environment: Detecting parameters such as the acidity and alkalinity and heavy metal ion content in the slurry helps control the pollution of the slurry to the surrounding soil, water body, etc., realize green construction, and protect the ecological environment.

[0008] 6. Guide the adjustment of construction technology: According to the changes in the slurry parameters, the construction technology can be adjusted in a timely manner, such as adjusting the slurry ratio, replacing the equipment of the slurry circulation system, etc., to improve the construction efficiency and construction quality.

[0009] The prior art has three major defects: (1) Traditional winching equipment relies on external power sources, and cable layout restricts mobility (such as the power supply limitations of patent document 202320433955.0); (2) The control accuracy of sampling depth is insufficient, and millimeter-level positioning cannot be achieved (such as the wall-building equipment in patent document 202210123159.7 only has centimeter-level positioning); (3) The safety protection mechanism is lacking, and operators need to work near the foundation pit. The dual-mode drive, precise depth measurement, and multiple safety designs of the present invention can effectively solve the above problems. Summary of the Invention

[0010] In order to solve the problems that previous detection methods require on-site power supply and cable laying, and it is impossible to conveniently sample at a specified depth, the present invention proposes a numerically controlled slurry sampling device for deep foundation pits at construction sites to meet the actual on-site detection requirements. This device has its own power supply, high detection flexibility, a wide range, and a built-in depth measurement device, which can accurately sample according to the sampling requirements at different depths.

[0011] To achieve the above object, the technical solution of the present invention is as follows:

[0012] A numerically controlled slurry sampling device for deep foundation pits at construction sites, comprising: a cantilever telescopic structure, a winch mechanism, a dual-mode drive system, a depth measurement unit, and a safety device.

[0013] The cantilever telescopic structure is installed on a handcart and consists of a telescopic vertical rod with adjustable height and a telescopic horizontal rod with adjustable length, capable of hovering at any position.

[0014] The winch mechanism is installed on the cantilever telescopic structure, driven by the dual-mode drive system, and connected to the slurry sampling barrel through a lifting cable.

[0015] The dual-mode drive system includes a servo drive module powered by a lithium battery and a semi-electric drive mode with a replaceable high-torque electric drill.

[0016] The depth measurement unit consists of a length-measuring wheel and a real-time display instrument, supports the zero-clearing function and is integrated in the control electric box; the length-measuring wheel presses on the lifting cable, and the moving value of the lifting cable is displayed in real time on the display instrument, thereby realizing visual measurement.

[0017] The safety device includes a travel switch fixed to the telescopic horizontal rod and a contact block that can slide on the lifting cable.

[0018] Furthermore, the device is also equipped with a counterweight anti-overturning system, which includes a counterweight block at the rear of the handcart and a dual-counterweight design of the lithium battery.

[0019] Furthermore, the servo drive module includes a servo reduction motor and a servo driver, and supports button control and remote computer control.

[0020] Furthermore, the hoisting mechanism is configured with a worm and worm gear mechanism with a self-locking function, and a powder metallurgy self-lubricating material is adopted.

[0021] Furthermore, an anti-jumping wire wheel is also installed on the telescopic cross bar.

[0022] Furthermore, the control box is equipped with an emergency stop switch, a knob switch, and a speed regulation switch. The control box is also equipped with a counter wheel meter for real-time observation of the underwater depth.

[0023] Furthermore, the high-torque electric drill in the semi-electric mode outputs a torque ≥ 50 N·m and is equipped with a quick-release interface coupled to the drive shaft of the hoisting mechanism.

[0024] Furthermore, the travel switch of the safety device is a mechanical contact switch with an IP67 protection level, the triggering force ≤ 2 N, and the response time < 50 ms.

[0025] Furthermore, the counter wheel surface of the depth measurement unit is provided with a V-shaped groove, and the diameter tolerance fit with the lifting cable is ±0.5 mm, and the encoder resolution reaches 0.1 mm.

[0026] Furthermore, the telescopic vertical rod and the telescopic cross bar adopt a socket structure and are equipped with wing nuts, and the height and the extended length can be freely adjusted according to the on-site actual situation.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. The mobility of on-site detection is improved;

[0029] 2. The electric and semi-electric operation modes expand the detection range of activities;

[0030] 3. The safety device increases the reliability of operation and ensures the safety of operators;

[0031] 4. The structure is simple, portable and easy to operate, reliable in operation, improves the adaptability of detection work, avoids the risk of operators near the edge, and effectively reduces the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structural schematic diagram of the numerical control slurry sampling equipment for deep foundation pits at the construction site of the present invention;

[0033] Figure 2 is the schematic diagram of the semi-electric control equipment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following specifically describes the embodiments of the present invention in conjunction with the drawings and examples.

[0035] A numerical control slurry sampling device for deep foundation pits at construction sites, adopting a cantilever structure, with sampling and slurry depth measurement functions.

[0036] The cantilever structure is adopted to ensure the safety of measurement staff and keep them away from the edge openings of deep foundation pits. The winch is equipped with a self-locking mechanism, which can achieve hovering at any position. The winding method and capacity of the cable drum solve the requirements for different cable lengths during measurement. The drive device uses a servo motor and a servo driver, and a four-button switch can achieve button control and computer control. The design uses direct current and is equipped with a lithium battery, which can avoid the problems of finding power sources on site and laying cables, and improve the mobility of detection. The safety device structure uses a mechanical contact type. The travel switch is fixed under the crossbar, and the contact block can be flexibly fixed on the cable. When the contact block touches the roller of the travel switch, the device will immediately stop operating, ensuring the safety and reliability of the device.

[0037] In addition to the above electric mode, a semi-electric mode is also designed; if the motor fails or the lithium battery runs out of power, the semi-electric mode selects a high-torque electric drill, which can replace the motor drive and further expand the detection range.

[0038] Both the electric mode and the semi-electric mode are equipped with a metering function and are equipped with a depth display instrument. The instrument has a zero-clearing mode and can measure the underwater detection depth in real time, and can accurately measure the detection data corresponding to different underwater depths.

[0039] Embodiment:

[0040] As Figure 1 shown, the numerical control slurry sampling device for deep foundation pits at construction sites of the present invention includes a winch mechanism 1, a servo motor 2, a control electric box 3, a telescopic vertical rod 4, a counterweight 5, a hand-push trolley 6, a lithium battery 7, a telescopic crossbar 8, an anti-jumping wire wheel 9, a meter wheel with an instrument 10, a pulley 11, a lifting cable 12, a slurry sampling cylinder and a counterweight 13, a travel switch 14, and a contact block 15

[0041] The winch mechanism 1 and the servo motor 2 form a drive device to control the lifting of the slurry sampling cylinder and the sensor;

[0042] The telescopic vertical rod 4 and the telescopic crossbar 8 form a telescopic device, and the height and extended length can be adjusted to adapt to more working conditions;

[0043] An anti-jumping wire wheel 9 is installed on the telescopic crossbar 8, and the meter wheel 10 presses on the lifting cable 12. When the cable drum rotates, the lifting cable 12 moves, driving the rotation of the runner of the meter wheel 10, and the moving value is displayed on the instrument, thereby achieving the purpose of visual metering;

[0044] The hand-push trolley 6 can facilitate the operator to push left and right on site, reducing labor intensity; the counterweight 5 is located at the rear of the hand-push trolley 6 to prevent tipping;

[0045] The lithium battery 7 and the control electric box 3 are the power source and control system of the numerical control equipment; the lithium battery is located at the rear of the trolley 6 and can also function as a counterweight; the control box 3 is equipped with an emergency stop switch, a rotary switch, and a speed control switch, which is the hub for controlling the operation of the equipment. The control box 3 is also equipped with a counter wheel meter to observe the underwater depth in real time.

[0046] When the slurry extraction cylinder is separated from the water surface of the counterweight 13, the contact block 15 on the cable will instantly touch the roller of the travel switch 14, and the equipment will immediately stop running, thus improving the safety of the detection.

[0047] Preferably, the self-locking mechanism is a worm and worm gear structure, and a powder metallurgy self-lubricating material is preferably selected.

[0048] Preferably, the servo motor is a servo reduction motor with a servo driver and can be connected to a computer.

[0049] Preferably, for the depth measurement function, a counter wheel with a display meter mode is adopted.

[0050] Preferably, for the safety device, a travel switch is adopted to ensure the safety and reliability of the measurement work.

[0051] Preferably, for the semi-electric mode, a high-torque electric drill is selected, which can replace the motor drive.

[0052] Specific embodiments of the semi-electric control equipment:

[0053] As Figure 2 shown, in the semi-electric control equipment, a high-torque electric drill ② is used to replace the lithium battery 8 and the control electric box 4. By holding the electric drill, the hoisting mechanism 1 is driven to rotate; since there is no control electric box 4, the display meter ③ of the counter wheel is fixed behind the support of the hoisting mechanism 1 for easy observation.

[0054] Specific application embodiment 1:

[0055] When operating in a foundation pit with a depth of 15 m, the operator sets the sampling depth to 8.5 m through the control electric box (3). The servo motor (2) lowers the cable (12) at a speed of 0.2 m / s, and the counter wheel (10) feeds back the depth data in real time. When the contact block (15) triggers the travel switch (14), the system cuts off the power within 50 ms, and the measured positioning error < 3 mm. During the lifting process of the slurry extraction cylinder (13), the counterweight block (5) and the lithium battery (7) work together to ensure that the center of gravity offset of the equipment < 5%.

[0056] Specific application embodiment 2:

[0057] When the battery level of the lithium battery is below 20%, switch to the semi-electric mode. The operator connects a drill with a rated torque of 65 N·m to the drive shaft and observes the depth through a mechanical counter. Tests under a 7-level wind condition show that the system can still maintain a repeat positioning accuracy of ±5 mm.

[0058] The equipment of the present invention realizes three major innovations through modular design: (1) seamless switching between electric / semi-electric to ensure continuous operation under extreme conditions; (2) coordinated control of the self-locking of the worm and worm gear and servo drive to achieve a sampling positioning accuracy of ±2 mm; (3) a three-level safety protection system (mechanical self-locking + electronic limit + counterweight balance) reduces the overturning risk by 97%.

Claims

1. A numerical control slurry sampling device for deep foundation pits at construction sites, characterized in that, Including: A cantilever telescopic structure, a hoisting mechanism, a dual-mode drive system, a depth measurement unit, and a safety device. The cantilever telescopic structure is installed on a handcart and consists of a telescopic vertical rod with adjustable height and a telescopic horizontal rod with adjustable length, capable of hovering at any position. The hoisting mechanism is installed on the cantilever telescopic structure, driven by the dual-mode drive system, and connected to the slurry extraction cylinder through a lifting cable. The dual-mode drive system includes a servo drive module powered by a lithium battery and a semi-electric drive mode with a replaceable high-torque electric drill. The depth measurement unit consists of a length-measuring wheel and a real-time display instrument, supports the zero-clearing function, and is integrated into the control electrical box. The length-measuring wheel presses on the lifting cable, and the moving value of the lifting cable is displayed in real time on the display instrument, thus realizing visual measurement. The safety device includes a travel switch fixed to the telescopic horizontal rod and a contact block that can slide on the lifting cable.

2. The CNC slurry sampling equipment for deep foundation pits at construction sites according to claim 1, wherein The equipment is also equipped with a counterweight anti-overturning system, which includes a counterweight block at the rear of the handcart and a dual-counterweight design of the lithium battery.

3. The numerical control slurry sampling equipment for deep foundation pits at construction sites according to claim 1, characterized in that, The servo drive module includes a servo reduction motor and a servo driver, and supports button control and remote computer control.

4. The slurry numerical control sampling equipment for deep foundation pits at construction sites according to claim 1, characterized in that, The hoisting mechanism is configured with a worm and worm gear mechanism with a self-locking function, and uses a powder metallurgy self-lubricating material.

5. The numerical control slurry extraction equipment for deep foundation pits at construction sites according to claim 1, characterized in that, An anti-jumping wheel is also installed on the telescopic horizontal rod.

6. The numerical control slurry sampling equipment for deep foundation pits at construction sites according to claim 1, characterized in that, The control box is equipped with an emergency stop switch, a knob switch, and a speed control switch. The control box is also equipped with a length-measuring wheel instrument for real-time observation of the underwater depth.

7. The numerical control slurry sampling equipment for deep foundation pits at the construction site according to claim 1, wherein, The high-torque electric drill in the semi-electric mode outputs a torque of ≥50 N·m and is equipped with a quick-release interface coupled to the drive shaft of the hoisting mechanism.

8. The numerical control slurry sampling equipment for deep foundation pits at the construction site according to claim 1, characterized in that, The travel switch of the safety device is a mechanical contact switch with an IP67 protection level, the triggering force is ≤2 N, and the response time is <50 ms.

9. The numerical control slurry sampling equipment for deep foundation pits at construction sites according to claim 1, characterized in that, The surface of the length-measuring wheel of the depth measurement unit is provided with a V-shaped groove, and the diameter tolerance fit with the lifting cable is ±0.5 mm, and the encoder resolution reaches 0.1 mm.

10. The numerical control slurry sampling equipment for deep foundation pits at construction sites according to claim 1, characterized in that, The telescopic vertical rod and the telescopic horizontal rod adopt a socket structure and are equipped with wing nuts, and the height and the extended length can be freely adjusted according to the on-site situation.

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