A new type of TRD cement-soil mixing wall test block sampling device

Abstract

The utility model provides a novel TRD cement soil mixing wall test block sampling device relates to sampling device technical field, including sampling box, the back of sampling box is detachable connection with TRD cutting box through mounting piece, sampling box and mounting piece are connected through first electric push rod, the top of sampling box is provided with the seal cover that can overturn, one side of seal cover is hinged connection with sampling box, opposite side is connected with sampling box through electromagnetic lock buckle, the inner wall of seal cover is connected with the inner wall of sampling box through second electric push rod, the inside of sampling box is provided with timing module and pressure sensor. The utility model discloses can realize the automation and precision of test block sampling, reduce construction cost.

Description

Technical Field

[0001] This utility model relates to the field of sampling device technology, specifically a novel sampling device for TRD cement-soil mixing wall test blocks. Background Technology

[0002] TRD-80E and other chain-type cutting hosts cut, mix, and spray grout in thick overburden layers to form cement-soil walls of equal thickness. Traditional sampling methods require core sampling using a drilling rig after the wall is formed, which has the following drawbacks: (1) the core sampling time is delayed, the cement-soil has already initially set, and the strength is very different from the actual wall body; (2) the drilling rig is difficult to position and is easy to deviate from the center of the wall, resulting in poor representativeness of the core sample; (3) the process is overlapping, requiring additional equipment and platforms, resulting in high cost and low efficiency.

[0003] Existing sampling devices do not utilize the uniform rotation characteristic of the TRD-80E mechanical chain, thus failing to achieve integrated "fixing-timing-sampling-sealing-transfer". Therefore, designing a sampling device that can be snapped onto the chain, has a timed spring-loaded cover function, and can retract the cutting box for transfer is crucial for improving the sampling accuracy and efficiency of the TRD mixing wall. The purpose of this invention is to achieve this. Utility Model Content

[0004] In response to the above-mentioned existing technologies, this utility model proposes a novel TRD cement-soil mixing wall sampler. Through a snap-locking, timed control, and automatic retraction structure, it can solve the pain points of traditional sampling and achieve automation and precision in sampler sampling.

[0005] This utility model provides a novel TRD cement-soil mixing wall sampler, which includes a sampling box. The back of the sampling box is detachably connected to the TRD cutting box via an installation component. The sampling box and the installation component are connected via a first electric push rod. The top of the sampling box is provided with a flip-up sealing cover. One side of the sealing cover is hinged to the sampling box, and the opposite side is connected to the sampling box via an electromagnetic lock. The inner wall of the sealing cover is connected to the inner wall of the sampling box via a second electric push rod. The sampling box is equipped with a timing module and a pressure sensor. The first electric push rod, the second electric push rod, the electromagnetic lock, the timing module, and the pressure sensor are all connected to the control system. The control system is used to receive timing signals from the timing module and pressure signals from the pressure sensor, as well as to control the opening and closing of the electromagnetic lock and the extension and retraction of the first and second electric push rods.

[0006] Preferably, the inner wall of the sealing cap is provided with a rubber sealing ring.

[0007] Preferably, the mounting component consists of several buckles located on the back of the sampling box, and the outer wall of the TRD cutting box is provided with a slot that mates with the buckles. The buckles and the slots engage horizontally and are secured by a pin that passes through vertically.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Snap-on synchronous fixing: The snap-on and pin combination can be quickly fixed to the TRD-80E chain, solving the problem of chain swaying in traditional devices. The synchronization error is ≤±5mm, and the installation efficiency is improved by 60%.

[0009] 2. Precise sampling at set times: Combining the uniform speed characteristics of the chain, the sampling depth accuracy reaches ±20mm through the timing module, avoiding the error of manual depth judgment.

[0010] 3. Automatic sealing and collection integration: The pop-up cap retraction mechanism is linked with the sealing component to achieve a seamless connection of "pop-up sampling - full sample sealing - automatic collection", reducing the sample contamination rate to below 5%.

[0011] 4. Cutting box protection during transport: After the sampling box is retrieved, it is placed in the cutting box. There is no collision or damage during the transport process, and the integrity of the test block is significantly better than that of the traditional hoisting method.

[0012] 5. Circular economy: The main body of the device is made of wear-resistant steel, and each component can be disassembled for maintenance and can be reused ≥50 times. Compared with disposable sampling containers, the construction cost is reduced by 70%. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the novel TRD cement-soil mixing wall sampler in an embodiment of this utility model.

[0014] Figure 2 This is a schematic diagram showing the connection between the TRD cutting box and the sampling box in an embodiment of this utility model.

[0015] Figure 3 This is a schematic diagram of the sampling box in an embodiment of the present invention.

[0016] In the diagram, 1. Sampling box; 2. Buckle; 3. TRD cutting box; 4. Slot; 5. Pin; 7. Sealing cover; 8. Electromagnetic lock; 9. Second electric push rod; 10. Timing module. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] Example: Figure 1-3The device shown is a novel TRD cement-soil mixing wall sample collection device, comprising a sampling box 1. The sampling box 1 has two latches 2 on its back. The cutting chain of the TRD cutting box 3 has a groove 4 that mates with the latches 2. The latches 2 and grooves 4 engage horizontally to achieve a detachable connection between the sampling box 1 and the TRD cutting box 3. The device is then secured by a vertically penetrating pin 5 with a diameter of 8mm. The pin 5 prevents lateral displacement of the device, enabling quick assembly and disassembly and stable fixation. The sampling box 1 and latches 2 are connected by a first electric push rod, allowing the sampling box 1 to extend and retract from the TRD cutting box 3.

[0019] Furthermore, the sampling box 1 is made entirely of Q355ND wear-resistant steel to adapt to the complex soil friction and impact environment underground. The sampling box 1 has a rectangular structure with an internal volume of 150mm×150mm×150mm to conform to the standard test block size of cement soil, and the side wall thickness of the box is 10mm.

[0020] Furthermore, the top of the sampling box 1 is equipped with a flip-up sealing cover 7 to ensure no leakage after sealing. The inner wall of the sealing cover 7 is equipped with a rubber sealing ring. One side of the sealing cover 7 is hinged to the sampling box 1, and the opposite side is connected to the sampling box 1 via an electromagnetic lock 8. The inner wall of the sealing cover 7 is connected to the inner wall of the sampling box 1 via a second electric push rod 9, and the opening and closing of the sealing cover 7 is achieved by the second electric push rod 9.

[0021] Furthermore, the sampling box 1 is equipped with a timing module 10 and a pressure sensor.

[0022] Furthermore, the first electric push rod, the second electric push rod 9, the electromagnetic latch 8, the timing module 10, and the pressure sensor are all connected to the control system. The control system is a PLC control system, which is used to receive the timing signal from the timing module 10, the pressure signal from the pressure sensor, and to control the opening and closing of the electromagnetic latch 8, and the extension and retraction of the first electric push rod and the second electric push rod 9.

[0023] In this embodiment, both the first electric actuator and the second electric actuator 9 are miniature electric actuators with a stroke of 80mm.

[0024] In practical applications, each TRD cutting box 3 can be equipped with 1-2 units of this embodiment according to sampling requirements, enabling multi-point sampling at the same depth or stratified sampling at different depths to meet multi-dimensional quality inspection needs. The sampling device of this embodiment can complete the operation according to the following steps: (1) Parameter preset: Before construction, according to the target sampling depth (e.g. 5m, 12m), combined with the descent speed of the TRD cutting box 3 (e.g. 0.5m / min), input the preset time (e.g. 10min for 5m, 24min for 12m) into the timing module 10, and start the timing.

[0025] (2) Timed pop-out sampling: The sampling device descends at a constant speed with the TRD cutting box 3. When the timing ends, the timing module 10 sends a signal to the plc control system. The plc control system controls the first electric push rod and the second electric push rod 9 to extend. The sampling box 1 extends out of the TRD cutting box 3, and the sealing cover 7 is opened to ensure that the cement soil is fully filled into the box.

[0026] (3) Automatic sealing and retraction: The pressure sensor detects that the cement soil in the box has reached the preset pressure value and sends a signal to the PLC control system. The PLC control system controls the first electric push rod and the second electric push rod 9 to retract, and the sampling box 1 is retracted into the TRD cutting box 3, and the sealing cover 7 is closed; the PLC control system continues to control the electromagnetic lock 8 to lock the sealing cover 7. After the sampling box 1 is retracted, it fits against the inner wall of the cutting box to avoid collision during transportation.

[0027] (4) Sample block transfer and surface recovery: After the sampling device is sealed and recovered, it rotates upward synchronously with the TRD cutting box 3 and is transferred to the surface. During the transfer, the cutting box protects the sampling box 1 to prevent impact from underground stones or adhesion of cement and soil. An infrared positioning sensor can be set at the surface working platform. When the sampling device is transferred to the exposed position on the surface (≤300mm from the platform surface), the sound and light alarm is triggered to remind the operator to stop rotating the TRD cutting box 3. The operator pulls out the pin 5, removes the sampling device, opens the electromagnetic lock 8, and lifts the sealing cover 7 to take out the cement and soil sample block. The integrity of the sample block in this embodiment can reach more than 95%. The device can be reused after cleaning, such as rinsing off residual cement and soil with a high-pressure water gun. It can be used ≥50 times after a single maintenance.

[0028] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent solutions made using the contents of this utility model specification, whether directly or indirectly applied to other related technical fields, are also within the patent protection scope of this utility model.

Claims

1. A novel sampling device for TRD cement-soil mixing wall test blocks, characterized in that, Includes a sampling box, the back of which is detachably connected to the TRD cutting box via a mounting bracket, and the sampling box and the mounting bracket are connected via a first electric push rod; The top of the sampling box is provided with a flip-up sealing cover. One side of the sealing cover is hinged to the sampling box, and the opposite side is connected to the sampling box via an electromagnetic lock. The inner wall of the sealing cover is connected to the inner wall of the sampling box via a second electric push rod. The sampling box is equipped with a timing module and a pressure sensor. The first electric push rod, the second electric push rod, the electromagnetic lock, the timing module, and the pressure sensor are all connected to the control system. The control system is used to receive timing signals from the timing module and pressure signals from the pressure sensor, as well as to control the opening and closing of the electromagnetic lock and the extension and retraction of the first and second electric push rods.

2. The novel TRD cement-soil mixing wall sampler as described in claim 1, characterized in that, The inner wall of the sealing cap is provided with a rubber sealing ring.

3. The novel TRD cement-soil mixing wall sampler as described in claim 1 or 2, characterized in that, The mounting components are several buckles located on the back of the sampling box. The outer wall of the TRD cutting box is provided with a slot that mates with the buckles. The buckles and the slots engage horizontally and are secured by a pin that passes through vertically.

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