Automatic sampling device for geotechnical testing and use method thereof

Abstract

An automatic sampling device for geotechnical testing includes a fixed frame, characterized in that a support platform is provided on the fixed frame, a pulley is installed under the support platform, a plurality of soil sample supports are arranged on the support platform, and soil sample limit supports are located on both sides of the plurality of soil sample supports, and gaps are left between each adjacent soil sample support and soil sample limit supports; a horizontal electric push rod is provided on the fixed frame, the horizontal electric push rod is connected to the support platform, and can control the forward and backward movement of the support platform; a plurality of upper electric push rods matching the gaps are provided on the fixed frame, and a wire saw is provided at the bottom of the upper electric push rod for cutting and dividing soil samples. The device uses an electric push rod, a wire saw, a soil sample support and a support platform to automatically cut and divide soil samples, can flexibly adjust the size of the cut soil sample, and completes the cutting at one time. The divided soil sample specimens are regular and can be standardized. Compared with the traditional manual cutting method, it saves manpower and improves work efficiency and the quality of the divided soil samples.

Description

Technical Field

[0001] The invention relates to the field of geotechnical engineering investigation indoor geotechnical test, in particular to an automatic sampling device for geotechnical test. Technical Background

[0002] Geotechnical engineering investigation requires drilling a certain number of undisturbed soil samples at the construction site and sending them to the geotechnical laboratory to make various standard samples for testing in order to obtain the physical and mechanical properties of the strata required for engineering design and construction. The undisturbed soil samples drilled from the field need to be packaged with lead tubes, etc., and the size is generally Ф108mm×200mm~300mm. Indoor geotechnical test personnel use manual methods to divide the undisturbed soil samples drilled from the field into samples of different sizes such as 3cm~9cm in length according to the project requirements, so that the test personnel can further make standard samples for various tests. The key process is to divide the undisturbed soil samples, that is, to use a wire saw or a soil cutter to manually divide the undisturbed soil samples in turn. The traditional manual segmentation and sampling method has the following disadvantages: 1. When test personnel use manual cutting, they need to do it one by one, which leads to low test efficiency; 2. When dividing the harder original soil samples, due to the high hardness of the soil samples, manual cutting requires a lot of force, and the production process is time-consuming and labor-intensive; 3. The quality of the sample directly affects the accuracy of the test data. When manually dividing the original soil samples, multiple cuttings are required. The cutting speed and shaking are difficult to control, and the segmentation levels of different test personnel are also uneven, making it difficult to guarantee the quality of the samples; 4. When using wire saws or soil cutters manually, the sizes of the samples divided are different, especially the flatness of the cut surface is difficult to guarantee, which affects the subsequent production of standard samples.

[0003] In summary, the traditional method of dividing the original soil sample in geotechnical test is time-consuming, labor-intensive and inefficient because it uses manual division of soil samples. In addition, the size and flatness of the divided samples are difficult to control and the quality is difficult to ensure. In order to ensure the standardization of the size of the cut samples, ensure the quality of the samples, save manpower, improve work efficiency and the automation level of soil test technology, this device is specially invented. Summary of the invention

[0004] The purpose of the present invention is to provide an automated special device and method for dividing original soil samples, which is easy to use, can save labor, improve work efficiency and sample preparation quality, and meet sample standardization, in response to the shortcomings of the traditional manual division of original soil samples.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is an automatic sampling device for geotechnical testing, comprising a fixed frame, characterized in that a support platform is provided on the fixed frame, a pulley is installed under the support platform, a plurality of soil sample supports are arranged on the support platform, and soil sample limit supports are located on both sides of the plurality of soil sample supports, and gaps are left between each adjacent soil sample support and soil sample limit support; a horizontal electric push rod is provided on the fixed frame, and the horizontal electric push rod is connected to the support platform to control the forward and backward movement of the support platform, and a plurality of upper electric push rods matching the gaps are also provided on the fixed frame, and a wire saw is provided at the bottom of the upper electric push rod for cutting and dividing the soil samples.

[0006] Furthermore, the soil sample bracket and the soil sample limiting bracket are both U-shaped structures, which are convenient for placing and fixing the soil sample, and are hollowed out at the bottom to facilitate cleaning of debris.

[0007] Furthermore, baffles are provided at both ends of the soil sample limiting bracket to prevent the soil sample from moving left and right.

[0008] Furthermore, the wire saw is a U-shaped structure, made of alloy steel, with steel wire tied at the top for cutting and dividing soil samples.

[0009] Furthermore, a control cabinet is provided on the fixed frame. The control cabinet is a flat rectangular shape and has an electric push rod control system installed. The operation panel of the control cabinet is tilted and an upper electric push rod activation switch is embedded on the operation panel to control the activation of the upper electric push rod; a control switch to control the operation of the upper electric push rod after activation; a horizontal electric push rod switch to control the operation of the horizontal electric push rod; and a reset switch to control the resetting of the upper and horizontal electric push rods, so as to facilitate fault inspection and repair when abnormal conditions occur.

[0010] A method for using an automatic sampling device for geotechnical testing, characterized in that the method comprises the following steps:

[0011] First, turn on the power, put the upper electric push rod in the starting position, press the horizontal electric push rod switch, push the bracket platform to the front of the control cabinet, put the original soil sample into the U-shaped groove of the soil sample bracket on the bracket platform, press the horizontal electric push rod switch, pull the bracket platform with the soil sample to the test position and stop; according to the size requirements of the soil sample to be divided, select the electric push rod that needs to work and press the corresponding enable switch, press the control switch, the selected upper electric push rod pushes the wire saw down steadily, cuts through the soil sample through the wire and passes into the gap of the bracket, at this time the soil sample has been completely divided by the wire, and then the push rod pulls the wire back to the original path and cuts through the soil sample again before resetting to ensure that the cut soil sample is completely separated; at this time, press the horizontal electric push rod switch, the push rod pushes the bracket platform with the cut soil sample to the front of the control cabinet, takes out the divided sample, cleans up the remaining debris, repeats the above steps, and divides the next original soil sample.

[0012] If there is any abnormality during the entire sample preparation process, you can press the control switch to stop the movement of the electric push rod, or press the reset switch to return the electric push rod to the preset position to clear the fault.

[0013] This test device uses an electric push rod, a wire saw, a soil sample holder and a holder platform to automatically cut and divide soil samples. The size of the cut soil samples can be flexibly adjusted, and the cutting is completed in one go. The divided soil samples are tested in a regular manner and can be standardized. Compared with the traditional manual cutting method, it saves manpower, improves work efficiency and the quality of divided soil samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1-1 Front view of an automatic sampling device for geotechnical testing.

[0015] Figure 2-1 Side view of an automatic sampling device for geotechnical testing.

[0016] Figure 3 -Top view of operating cabinet + support platform + horizontal electric push rod.

[0017] Figure 4 - Schematic diagram of a wire saw.

[0018] Figure 5 -Schematic diagram of soil sample limiting bracket.

[0019] Figure 6 -Schematic diagram of soil sample holder.

[0020] The figure includes: 1-fixed frame; 2-upper electric push rod; 3-wire saw; 4-soil sample bracket; 5-soil sample limit bracket; 6-bracket platform; 7-pulley; 8-control cabinet; 9-horizontal electric push rod switch; 10-upper electric push rod enable switch; 11-control switch; 12-reset switch; 13-horizontal electric push rod; 14-original soil sample. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings:

[0022] like Figure 1 and Figure 2The figure shows the front view and the side view of the device, which is connected to 9 upper electric push rods 2 through a fixed frame cabinet 1, and a wire saw 3 is screwed on the top of each upper electric push rod 2, which are arranged at equal intervals with a spacing of 3 cm; the control cabinet 8 operation panel is set at an angle of 30° with the plumb plane, and the operation panel is equipped with a horizontal electric push rod switch 9, 9 upper electric push rod enabling switches 8, a control switch 11, and a reset switch 12; the upper electric push rod enabling switch 8 controls the enabling of the corresponding upper electric push rod 2, and the horizontal electric push rod switch 9 controls the movement and Stop; the control switch 11 controls the movement and stop of the upper electric push rod 9 after it is enabled, and the reset switch 12 controls the upper electric push rod 9 and the horizontal electric push rod 13 to return to their original positions; the bracket platform 6 is screwed with the horizontal electric push rod 13 and placed on the control cabinet 8, with a pulley 7 installed underneath, which can move back and forth through the operation of the push rod 13, and 9 soil sample brackets 4 and 2 soil sample limit brackets 5 are embedded on it, which are U-shaped structures, arranged at equal intervals, with a spacing of 1 cm, facing the wire saw 3 above, which can effectively stabilize the original soil samples and the cut samples, and the remaining spacing gaps are used for the wire to pass through.

[0023] Figure 3 The figure shows a top view of the operating cabinet 8, the support platform 6 and the horizontal electric push rod 13. The support platform 6 with the soil sample support 4 and the soil sample limit support 5 can be pushed out and pulled back by the horizontal electric push rod 13, so as to facilitate the placement of the original soil sample that needs to be cut or to take out the cut soil sample for testing.

[0024] Figure 4 The figure shows a schematic diagram of a wire saw 3, which is screwed to the bottom of the upper electric push rod 2, is made of alloy steel, has a U-shaped structure, and has a steel wire tied to the top. The original soil sample can be smoothly cut by pushing the upper push rod.

[0025] Figure 5 and Figure 6 The figure shows a schematic diagram of a soil sample support 4 and a soil sample limiting support 5, which is a U-shaped structure, wherein a baffle is provided on one side of the soil sample limiting support 5, which can play a role of enclosure and fixation after the original soil sample 14 is placed.

[0026] When the device is used for automatic sample sorting, first press the horizontal electric push rod switch 9 to push the bracket platform 6 to the front end of the control cabinet 8, and place the original soil sample to be divided in the U-shaped groove composed of the soil sample limit bracket 5 and the soil sample bracket 4, press the horizontal electric push rod switch 9, the push rod will pull the bracket platform 6 with the soil sample to the test position and then stop, and then select and press the upper electric push rod enabling switch 10 to enable the upper electric push rod 2 that needs to work. After setting, press the control switch 11 to start the selected upper electric push rod 2 to push the bottom wire saw 3 to cut steadily. The steel wire on the wire saw 3 cuts into the soil sample steadily, passes through the soil sample, returns to the gap between the bracket 4 and the soil sample limit bracket 5, and resets after cutting the soil sample again. At this time, the soil sample has been completely cut. At this time, press the horizontal electric push rod switch 13, and the push rod will push the sample bracket platform 6 with the cut soil sample to the front end of the control cabinet 8. At this time, the divided sample can be taken out, the residual slag is cleaned, and the test is completed. If it is necessary to continue sampling, a new original soil sample can be placed in the U-shaped groove formed by the soil sample limiting bracket 5 and the soil sample bracket 4, and the above steps can be repeated.

Claims

1. An automatic sampling device for geotechnical testing, comprising a fixed frame, characterized in that A support platform is provided on the fixed frame, a pulley is installed under the support platform, a plurality of soil sample supports and soil sample limit supports located on both sides of the plurality of soil sample supports are provided on the support platform, and a gap is left between each adjacent soil sample support and soil sample limit support; a horizontal electric push rod is provided on the fixed frame, and the horizontal electric push rod is connected to the support platform and can control the forward and backward movement of the support platform. The fixed frame is also provided with a plurality of upper electric push rods matching the gaps, and a wire saw is provided at the bottom of the upper electric push rod for cutting and dividing soil samples. The wire saw is a U-shaped structure made of alloy steel, and a steel wire is tied at the top for cutting and dividing soil samples. The soil sample supports and soil sample limit supports are both U-shaped structures, which are convenient for placing and fixing soil samples, and the bottom is hollowed out to facilitate cleaning of debris.

2. The automatic sampling device for geotechnical testing according to claim 1, characterized in that Baffles are provided at both ends of the soil sample limit bracket to prevent the soil sample from moving left and right.

3. The automatic sampling device for geotechnical testing according to claim 1, characterized in that A control cabinet is provided on the fixed frame. The control cabinet is a flat rectangular shape and has an electric push rod control system installed therein. The operation panel of the control cabinet is tilted and an upper electric push rod enabling switch is embedded on the operation panel to control the enabling of the upper electric push rod; a control switch to control the operation of the upper electric push rod after enabling; a horizontal electric push rod switch to control the operation of the horizontal electric push rod; and a reset switch to control the resetting of the upper and horizontal electric push rods, so as to facilitate fault inspection and maintenance in case of abnormal conditions.

4. The method for using the automatic sampling device for geotechnical testing according to claim 1, characterized in that The method comprises the following steps: First, turn on the power, put the upper electric push rod in the starting position, press the horizontal electric push rod switch, push the bracket platform to the front of the control cabinet, put the original soil sample into the U-shaped groove of the soil sample bracket on the bracket platform, press the horizontal electric push rod switch, pull the bracket platform with the soil sample to the test position and stop; according to the size requirements of the soil sample to be divided, select the electric push rod that needs to work and press the corresponding enable switch, press the control switch, the selected upper electric push rod pushes the wire saw down steadily, cuts through the soil sample through the wire and passes into the gap of the bracket, at this time the soil sample has been completely divided by the wire, and then the push rod pulls the wire back to the original path and cuts through the soil sample again before resetting to ensure that the cut soil sample is completely separated; at this time, press the horizontal electric push rod switch, the push rod pushes the bracket platform with the cut soil sample to the front of the control cabinet, takes out the divided sample, cleans up the remaining debris, repeats the above steps, and divides the next original soil sample.

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