Rapid soil sampling equipment for geotechnical test

Abstract

The utility model discloses rapid soil sampling equipment for a soil test, which relates to the field of soil test devices and comprises a supporting platform, a sampling barrel which penetrates through the supporting platform and is vertically mounted and a first lifting device which is used for enabling the sampling barrel to move up and down, and a plurality of channels are formed in the side wall of the sampling barrel. One end of the channel is positioned at the lower end of the sampling barrel, and the other end is positioned at the upper end of the sampling barrel. The problems that when a sampling device is pulled out, the sampling device is difficult to take out, and a taken soil sample is lost, so that normal test is influenced are solved.

Description

Technical Field

[0001] The utility model relates to the field of geotechnical test devices, in particular to a geotechnical test rapid soil sampling device. Background Art

[0002] Geotechnical testing is an important part of engineering geological survey. It provides reliable indicators of soil physical and mechanical properties for studying soil deformation mechanism and engineering geological properties in engineering design and engineering geological survey. Geotechnical testing is used to measure soil density, water content, specific gravity, liquid limit, plastic limit, particle analysis, etc.

[0003] In geotechnical tests, soil sampling needs to be carried out in advance to avoid causing instability in geotechnical engineering. Today, geotechnical test soil sampling devices require particularly large pressing forces to drive the sampling devices into the bedrock soil due to the relatively high hardness of some ground surfaces, and then bring the soil out for testing. When the sampling devices are taken out from deep in the soil, due to the effect of atmospheric pressure, the sampling devices are difficult to pull out, or the soil samples taken inside the device are lost after being pulled out, affecting the progress of the test. Utility Model Content

[0004] The utility model provides a geotechnical test rapid soil sampling device to solve the problem that when the sampling device is pulled out, the sampling device is difficult to be taken out and the soil sample taken is lost, thus affecting the normal progress of the test.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] A geotechnical test rapid soil sampling equipment comprises a support platform, a sampling barrel penetrating the support platform and installed vertically, and a first lifting device for moving the sampling barrel up and down. A plurality of channels are opened on the side wall of the sampling barrel, one end of the channel is located at the lower end of the sampling barrel, and the other end is located at the upper end of the sampling barrel.

[0007] The utility model provides a gas channel inside the wall of the sampling tube to deliver gas from the upper end of the sampling tube to the lower end of the sampling tube, thereby reducing the force required when the lower end of the sampling tube is taken out from the rock and soil layer. At the same time, since the channel balances the air pressure, the possibility of the soil sample in the sampling tube being sucked out by the air pressure below the sampling tube when the sampling tube is pulled out is reduced.

[0008] Furthermore, the sampling cylinder comprises a first half cylinder and a second half cylinder that match each other.

[0009] In order not to disturb the distribution of soil in the sampling tube, a structure in which the first half tube and the second half tube are buckled together is adopted, which makes it easy to open the sampling tube without disturbing the distribution of soil.

[0010] Furthermore, a plurality of slide grooves are provided on the side walls that match the first half cylinder and the second half cylinder, and two limit plates are provided at the open ends of the slide grooves. A plurality of sliders are provided on the side walls that match the second half cylinder and the first half cylinder, and limit blocks are provided at the tops of the sliders. The sliders correspond to the slide grooves one by one, and a slider channel is provided between the two limit plates. One end of the limit plate is connected to the slide groove, and a notch is provided between the other end and the slide groove. The notch is connected to the inside of the slide groove to form a limit block channel.

[0011] When inserting the sampling tube into the rock and soil layer, it is necessary to apply a large pressure on the sampling tube, so the first half tube and the second half tube need to be firmly connected. This structure places a limit block into the slide groove from the notch and slides to one side of the limit block for limiting, so that the first half tube and the second half tube cannot be easily separated, and multiple limit blocks work together to increase the reliability of the connection between the first half tube and the second half tube.

[0012] Furthermore, the sampling cylinder also includes a limiting end cover installed on the upper ends of the first half cylinder and the second half cylinder.

[0013] Due to the characteristics of the limiting structure between the first half-cylinder and the second half-cylinder, that is, the first half-cylinder and the second half-cylinder can only be separated by moving in opposite directions along the axis after being matched. Therefore, the first half-cylinder and the second half-cylinder are prevented from moving in opposite directions along the axis by installing limiting end covers on the upper ends after being matched, thereby avoiding the first half-cylinder and the second half-cylinder from being separated when used again.

[0014] Furthermore, the limiting end cover is provided with an openable and closable air hole.

[0015] When the sampling tube is inserted into the rock and soil layer, the air hole is opened to exhaust the air inside the sampling tube to facilitate the soil sample to enter the sampling tube. When the sampling tube is pulled out, the air hole is closed to prevent circulation at the upper and lower ends of the sampling tube to avoid soil loss inside the sampling tube.

[0016] Furthermore, the support platform includes a plurality of support mechanisms, and the support mechanisms are evenly distributed around the circumference of the axis of the sampling tube. The support mechanisms are used to support the support platform so that the support platform is stably installed.

[0017] Furthermore, the supporting mechanism includes a column with a tapered lower end and a second lifting device for moving the column up and down.

[0018] The conical column is easy to insert into the rock and soil layer. The second lifting device adjusts the orientation of the supporting platform, thereby adjusting the angle of the sampling tube, and can be inserted into the rock and soil layer according to the angle required by the test.

[0019] Furthermore, the support mechanism also includes an anti-slip device, which includes a threaded rod, a connecting plate installed at the lower end of the threaded rod, and a plurality of blocking blocks rotatably connected to the column. A threaded hole is provided on the axis of the column, and the threaded rod is installed in the threaded hole. The connecting plate is located in a cavity opened inside the column. A plurality of limiting holes for connecting the blocking block are provided on the connecting plate. The blocking block is provided with a guide column passing through the limiting hole, and the rotating shaft connecting the blocking block and the column is located below the connecting plate.

[0020] When the sampling tube is pulled out, an upward pulling force is required along the axis of the sampling tube, and this pulling force is relatively large. For this soil sampling equipment, this upward pulling force is provided by the supporting mechanism. Therefore, the supporting mechanism needs to have sufficient downward pulling force. This structure increases the downward pulling force of the supporting mechanism through an anti-slip device. In this structure, after the column is inserted into the rock and soil layer, the threaded rod is rotated to move the threaded rod downward, driving the connecting plate to move downward, pushing the blocking block to rotate in a direction away from the column, so that the outer side of the blocking block is embedded in the rock and soil layer, providing a resistance for the column to leave the rock and soil layer, and a plurality of blocking blocks provide greater resistance, so that the support mechanism is installed more firmly.

[0021] Furthermore, the column is provided with a plurality of grooves, and the blocking blocks are located in the grooves.

[0022] The blocking block is made to rotate at the groove, and when the blocking block is not in use, it is completely embedded in the groove, so that the column is easy to insert into the rock and soil layer.

[0023] Furthermore, the upper end of the blocking block is a plane, and the side of the upper end of the blocking block away from the column is configured as a split tip, so as to facilitate the embedding of the blocking block into the rock and soil layer.

[0024] One or more technical solutions provided by the utility model have at least the following technical effects or advantages:

[0025] (1) The utility model provides a gas channel inside the wall of the sampling tube to deliver gas from the upper end of the sampling tube to the lower end of the sampling tube, thereby reducing the force required to remove the lower end of the sampling tube from the rock and soil layer. At the same time, since the channel balances the air pressure, the possibility of the soil sample in the sampling tube being sucked out by the air pressure below the sampling tube when the sampling tube is pulled out is reduced;

[0026] (2) By placing the limiting block into the slide groove from the notch and sliding it to one side of the limiting block for limiting, the first half cylinder and the second half cylinder cannot be easily separated, and multiple limiting blocks work together to increase the reliability of the connection between the first half cylinder and the second half cylinder;

[0027] (3) The anti-slip device increases the downward pulling force of the support mechanism, providing a resistance for the column to leave the rock and soil layer, making the support mechanism more securely installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of the present utility model, and do not constitute a limitation on the embodiments of the present utility model;

[0029] Figure 1 It is the structure and partial cross-sectional view of the soil taking equipment in the utility model;

[0030] Figure 2 yes Figure 1 Sectional view of part A in the middle;

[0031] Figure 3 It is a sectional view of the lower end of the column;

[0032] Among them, 1-support platform, 2-sampling tube, 201-channel, 202-slide groove, 203-limiting plate, 204-slider, 205-limiting block, 206-notch, 207-limiting end cover, 3-first lifting device, 401-column, 402-second lifting device, 403-threaded rod, 404-connecting plate, 405-blocking block, 406-cavity, 407-guide column, 408-groove. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those within the scope of this description. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0035] Embodiment 1

[0036] This embodiment provides a geotechnical test rapid soil collection device, such as Figure 1-Figure 3 As shown, it includes a supporting platform 1, a sampling barrel 2 that penetrates the supporting platform 1 and is vertically installed, and a first lifting device 3 for moving the sampling barrel 2 up and down. A plurality of channels 201 are opened on the side wall of the sampling barrel 2, and one end of the channel 201 is located at the lower end of the sampling barrel 2, and the other end is located at the upper end of the sampling barrel 2.

[0037] Among them, the sampling tube 2 is preferably installed in the middle of the supporting platform 1, with a more reasonable structure and more uniform force. The first lifting device 3 can be a gear lifting mechanism, a hydraulic lifting mechanism, etc. The number of channels 201 is determined according to user needs and is evenly distributed along the circumference of the sampling tube 2. A filter is preferably provided at the lower end of the channel 201 to prevent soil from passing through. The upper opening of the channel 201 is preferably provided on one side of the upper end of the sampling tube 2 to facilitate the installation of the upper end cover of the sampling tube 2.

[0038] In a more preferred embodiment, the sampling cylinder 2 includes a first half cylinder and a second half cylinder that match each other.

[0039] Among them, the first half cylinder and the second half cylinder can be two semi-cylindrical cylinders, which are convenient for cleaning the soil samples inside, or they can be a major arc half cylinder and a minor arc half cylinder. When taking the soil sample inside the sampling cylinder 2, opening one side of the minor arc half cylinder can prevent the loose soil sample from falling.

[0040] In a more preferred embodiment, a plurality of slide grooves 202 are provided on the side walls that match the first half cylinder and the second half cylinder, and two limit plates 203 are provided at the open ends of the slide grooves 202. A plurality of sliders 204 are provided on the side walls that match the second half cylinder and the first half cylinder, and limit blocks 205 are provided at the tops of the sliders 204. The sliders 204 correspond to the slide grooves 202 one by one, and a slider channel is provided between the two limit plates 203. One end of the limit plate 203 is connected to the slide groove 202, and a notch 206 is provided between the other end and the slide groove 202. The notch 206 is connected to the inside of the slide groove 202 to form a limit block channel.

[0041] Among them, the number of slide grooves 202 and sliders 204 is equal, and the specific number is any value greater than two, wherein at least one slide groove 202 is set on one side of the upper and lower ends of the first half cylinder, and at least one slider 204 is set on one side of the upper and lower ends of the second half cylinder, and the remaining slide grooves 202 and sliders 204 are evenly distributed along the vertical direction of the first half cylinder and the second half cylinder, and the slide grooves 202 on the first half cylinder and the sliders 204 on the second half cylinder correspond to each other one by one; the width of the limit block 205 is less than or equal to the width of the slide groove 202, and greater than the width of the slider channel, and the size of the limit block 205 can pass through the notch 206 and the limit block channel; the notch 206 is preferably set above the limit plate 203, so that the limit block 205 has a tendency to move away from the notch 206 under the action of gravity, thereby preventing the limit block 205 from detaching from the notch 206.

[0042] In a more preferred embodiment, the sampling cylinder 2 further comprises a limiting end cap 207 mounted on the upper ends of the first half cylinder and the second half cylinder. The limiting end cap 207 is airtight when mounted on the upper ends of the first half cylinder and the second half cylinder.

[0043] In a more preferred embodiment, an openable and closable air hole is provided on the position-limiting end cover 207. The air hole is airtight when closed.

[0044] Embodiment 2

[0045] Based on the first embodiment, Figure 1 and 3 As shown, the support platform 1 includes a plurality of support mechanisms, and the support mechanisms are evenly distributed around the circumference of the axis of the sampling tube 2. At least three support mechanisms are provided.

[0046] In a more preferred embodiment, the support mechanism includes a column 401 with a tapered lower end and a second lifting device 402 for moving the column 401 up and down. The second lifting device 402 can be a gear lifting mechanism, a hydraulic lifting mechanism, and the like.

[0047] In a more preferred embodiment, the support mechanism also includes an anti-slip device, which includes a threaded rod 403, a connecting plate 404 installed at the lower end of the threaded rod 403, and a plurality of blocking blocks 405 rotatably connected to the column 401. A threaded hole is provided on the axis of the column 401, and the threaded rod 403 is installed in the threaded hole. The connecting plate 404 is located in a cavity 406 opened inside the column 401. A plurality of limiting holes for connecting the blocking block 405 are provided on the connecting plate 404. The blocking block 405 is provided with a guide column 407 passing through the limiting hole. The rotating shaft connecting the blocking block 405 and the column 401 is located below the connecting plate 404.

[0048] Among them, most of the threaded rod 403 is located inside the column 401, the upper end of the threaded rod 403 is located above the top of the column 401, and the threaded hole inside the column 401 is preferably only provided in a section close to the top of the column 401, so as to reduce the force required for rotating the threaded rod 403; the connecting plate 404 is rotatably connected to the lower end of the threaded rod 403, and the connecting plate 404 is restricted to the lower end of the threaded rod 403 by the upper and lower limit rings, so that when the threaded rod 403 rotates, the connecting plate 404 will not rotate together, but when the threaded rod 403 moves up and down, the connecting plate 404 will move up and down together; the number of blocking blocks 405 is determined according to demand and is not specifically limited. 05 is evenly distributed along the circumference of the cylinder 401; the length of the cavity 406 is greater than or equal to the maximum moving distance of the connecting plate 404, and a through hole connecting the groove 408 is opened on the side wall of the cavity 406, which is used to connect the connecting plate 404 with the blocking block 405; the number of limiting holes is equal to that of the blocking block 405, and the guide column 407 passes through the limiting holes. Therefore, one side of the limiting hole also passes through the gap between the guide column 407 and the blocking block 405. The structure of one side of the limiting hole passing through the gap between the guide column 407 and the blocking block 405 is preferably set to a cylindrical shape to facilitate the rotation of the blocking block 405, and the rotation axis of the blocking block 405 is evenly distributed around the axis of the cylinder 401.

[0049] In a more preferred embodiment, a plurality of grooves 408 are formed on the column 401 , and the blocking blocks 405 are located in the grooves 408 .

[0050] The number of the grooves 408 is equal to the blocking block 405 , and the size of the grooves 408 can accommodate the blocking block 405 and the rotating blocking block 405 .

[0051] In a more preferred embodiment, the upper end of the blocking block 405 is a plane, and the side of the upper end of the blocking block 405 away from the column 401 is configured as a wedge tip.

[0052] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0053] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A geotechnical test rapid soil sampling device, characterized in that: The invention comprises a support platform (1), a sampling cylinder (2) penetrating the support platform (1) and installed vertically, and a first lifting device (3) for moving the sampling cylinder (2) up and down, wherein a plurality of channels (201) are provided on the side wall of the sampling cylinder (2), one end of the channel (201) is located at the lower end of the sampling cylinder (2), and the other end is located at the upper end of the sampling cylinder (2).

2. The rapid soil sampling equipment for geotechnical tests according to claim 1 is characterized in that: The sampling cylinder (2) comprises a first half cylinder and a second half cylinder which match each other.

3. The rapid soil sampling equipment for geotechnical tests according to claim 2 is characterized in that: A plurality of slide grooves (202) are provided on the side walls of the first half-cylinder and the second half-cylinder that match each other, and two limit plates (203) are provided at the open ends of the slide grooves (202). A plurality of sliders (204) are provided on the side walls of the second half-cylinder and the first half-cylinder that match each other, and limit blocks (205) are provided at the top ends of the sliders (204). The sliders (204) and the slide grooves (202) correspond one to one, and a slider channel is provided between the two limit plates (203). One end of the limit plate (203) is connected to the slide groove (202), and a notch (206) is provided between the other end and the slide groove (202), and the notch (206) is connected to the inside of the slide groove (202) to form a limit block channel.

4. The rapid soil sampling equipment for geotechnical tests according to claim 2 is characterized in that: The sampling cylinder (2) further comprises a limiting end cover (207) mounted on the upper ends of the first half cylinder and the second half cylinder.

5. The rapid soil sampling equipment for geotechnical tests according to claim 4 is characterized in that: The position-limiting end cover (207) is provided with an openable and closable air hole.

6. The rapid soil sampling equipment for geotechnical tests according to claim 1 is characterized in that: The support platform (1) comprises a plurality of support mechanisms, and the support mechanisms are evenly distributed around the circumference of the axis of the sampling cylinder (2).

7. The rapid soil sampling equipment for geotechnical tests according to claim 6 is characterized in that: The supporting mechanism comprises a column (401) with a tapered lower end and a second lifting device (402) for moving the column (401) up and down.

8. The rapid soil sampling equipment for geotechnical tests according to claim 7, characterized in that: The support mechanism also includes an anti-slip device, which includes a threaded rod (403), a connecting plate (404) installed at the lower end of the threaded rod (403), and a plurality of blocking blocks (405) rotatably connected to the column (401); a threaded hole is provided on the axis of the column (401), the threaded rod (403) is installed in the threaded hole, the connecting plate (404) is located in a cavity (406) provided inside the column (401), a plurality of limiting holes for connecting the blocking block (405) are provided on the connecting plate (404), the blocking block (405) is provided with a guide column (407) passing through the limiting hole, and the rotating shaft connecting the blocking block (405) and the column (401) is located below the connecting plate (404).

9. The rapid soil sampling equipment for geotechnical tests according to claim 8, characterized in that: The column (401) is provided with a plurality of grooves (408), and the blocking blocks (405) are located in the grooves (408).

10. The rapid soil sampling equipment for geotechnical tests according to claim 8, characterized in that: The upper end of the blocking block (405) is a plane, and the side of the upper end of the blocking block (405) away from the column (401) is configured as a split tip.

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