Sand sampler for geotechnical investigation

Abstract

The utility model discloses a geotechnical investigation sand sampler, relates to geotechnical investigation technical field, including the machine body, said machine body bottom both sides are fixedly connected with extension plate respectively, said two extension plate ends far away from machine body are connected with operating handle together, the lower end of machine body is provided with the working cylinder, the working cylinder is provided with the working cylinder. The bottom of the working cylinder is sleeved with a fixing base through a plurality of sets of bolts, a base is installed at the bottom of the fixing base, and the base is connected with a coring pipe through an formed connecting groove. By means of the supporting rod and the threaded rod, when the pressing rod is adjusted, the movable rod can be driven to move synchronously, so that the piston is driven to move up and down in the coring pipe, the lower surface of the piston makes contact with a rock-soil sample in the coring pipe, the pressing rod is continuously pressed downwards, finally, the piston abuts against the sample, and therefore the rock-soil sample in the coring pipe is tightly pressed; the rock and soil samples can be conveniently and completely taken out from the drilled hole, the hierarchical distribution of the samples is not changed, and the disturbance to the samples is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rock and soil exploration, in particular to a rock and soil exploration sand collecting device. Background Art

[0002] A geotechnical investigation sand sampler is a tool used to collect sand samples during geotechnical engineering investigations. It is usually designed to effectively obtain undisturbed or minimally disturbed sand samples so as to accurately analyze and study the physical and mechanical properties of the sand.

[0003] Prior art: Publication (Announcement) No.: CN219935334U discloses a rock and soil exploration sand sampling device, which injects water into the water injection cavity between the inner drill tube and the outer drill tube through the water injection hole, and starts a drive motor to drive the inner drill tube and the outer drill tube to rotate. At this time, the sampled soil will become soft due to the soaking of the water flow, thereby reducing the external force required to press the inner drill tube and the outer drill tube into the specified position, making it convenient for the staff to penetrate the inner drill tube and the outer drill tube into the sampled soil, and improving the smoothness of sampling. However, the device does not take into account the actual usage. During actual use, it is not easy to control the amount of water added. Excessively soaked soil will cause the drilled hole to collapse, and the upper rock and soil will fall to the bottom of the hole. Moreover, after the rock and soil sample is mixed with water, the friction between it and the inner wall of the drill tube will be reduced, thereby reducing the representativeness and integrity of the sample, affecting the subsequent test results. In view of this, the present application proposes a rock and soil exploration sand sampling device. Summary of the Invention

[0004] The purpose of the utility model is to provide a rock and soil exploration sand sampling device, which solves the problem of incomplete sampling of samples in drilled holes.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A geotechnical exploration sand sampling device comprises a body, with extension plates fixedly connected to both sides of the bottom of the body, and an operating handle commonly connected to one end of the two extension plates away from the body. A working cylinder is provided at the lower end of the body, and a fixing seat is sleeved on the bottom of the working cylinder via multiple groups of bolts. A base is installed at the bottom of the fixing seat, and the base is connected to a core sampling tube via a connecting groove.

[0007] A movable rod is provided in the working cylinder, the bottom of the movable rod is fixedly connected to a piston, the top of the movable rod is fixedly connected to a support rod, the end of the support rod away from the movable rod is fixedly connected to a threaded rod, a threaded sleeve is threadedly connected on the threaded rod, the end of the threaded rod away from the support rod extends to the outside of the working cylinder and is fixedly connected to a connecting plate, and the connecting plate is fixedly connected to a pressure rod through two connecting rods.

[0008] As a further preferred embodiment of the present technical solution, two positioning pins are symmetrically arranged on the base, a threaded groove is provided on the inner wall of the connecting groove, an external thread is provided on the outer wall of the core tube, and the threaded groove corresponds to the size of the external thread, thereby ensuring the stability of the connection and avoiding shaking of the core tube during sampling.

[0009] As a further preferred embodiment of the present technical solution, a movable cavity is commonly provided inside the working cylinder and the fixing seat, and the movable rod is vertically arranged in the movable cavity.

[0010] As a further preferred embodiment of the present technical solution, a sliding groove is provided on one side of the working cylinder and the fixed seat, the support rod is arranged in the sliding groove, and the width of the support rod is equal to the width of the sliding groove, thereby improving the stability of the movable rod when moving.

[0011] As a further preferred embodiment of the present technical solution, the bottom of the movable rod extends into the core tube, the piston is arranged in the core tube, and the diameter of the piston is equal to the diameter of the core tube, so that the lower surface of the piston is against the sample inside the core tube, thereby compacting the sample, avoiding the internal sample from breaking when the core tube is removed upward, and improving the integrity of the removed sample.

[0012] As a further preferred embodiment of the present technical solution, two abutment blocks are symmetrically provided on one side of the threaded sleeve close to the working cylinder, and the widths of the two abutment blocks are both greater than the width of the slide groove. The side walls of the two abutment blocks close to the working cylinder are set to be arc-shaped, and two shift rods are symmetrically provided on the threaded sleeve to facilitate adjusting the position of the piston below.

[0013] The present invention has the following beneficial effects: 1. The present invention provides a support rod, a threaded rod and a pressure rod. When the pressure rod is adjusted, the movable rod will be driven to move synchronously, thereby driving the piston to move up and down in the core tube, so that the lower surface of the piston contacts the rock and soil sample in the core tube, and the pressure rod is continuously pressed down, and the piston and the sample are eventually abutted, thereby compacting the rock and soil sample inside the core tube, making it easier to completely remove the rock and soil sample from the drilled hole without changing the layer distribution between the samples, thereby reducing disturbance to the sample. 2. The present invention provides a lever. When the threaded sleeve is driven to rotate, it will move along the direction set by the threaded rod, and eventually the abutment block will abut against the outer wall of the working cylinder, thereby fixing the position of the pressure rod and adjusting the piston to a suitable position according to the sampling depth, thereby avoiding any influence during the sampling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 The utility model is a schematic diagram of the main structure of a rock and soil exploration sand sampling device proposed by the present invention.

[0016] Figure 2 The utility model is a partial cross-sectional structural diagram of a rock and soil survey sand sampling device proposed by the present invention.

[0017] Figure 3 The present invention is a structural schematic diagram of an adjusting device for a rock and soil exploration sand extractor.

[0018] Figure 4 The utility model provides a structural diagram of a threaded rod and a pressure rod of a rock and soil exploration sand sampling device.

[0019] Figure 5 The present invention is a structural schematic diagram of a threaded sleeve of a rock and soil exploration sand extractor.

[0020] In the figure: 1. Machine body; 2. Extension plate; 3. Operating handle; 4. Working cylinder; 41. Fixed seat; 42. Movable chamber; 43. Slide groove; 5. Base; 51. Connecting groove; 52. Core tube; 53. Positioning pin; 6. Movable rod; 7. Piston; 8. Support rod; 81. Threaded rod; 82. Connecting plate; 83. Press rod; 84. Threaded sleeve; 85. Abutment block; 86. Push rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The utility model provides a technical solution: Figure 1-5As shown, a geotechnical exploration sand sampling device includes a body 1, with extension plates 2 fixedly connected to both sides of the bottom of the body 1. The ends of the two extension plates 2 away from the body 1 are connected to an operating handle 3. During use, the body 1 is started, and the operator holds the operating handle 3 and presses it downward to move the device downward, collecting samples through a core tube 52. A working cylinder 4 is provided at the lower end of the body 1. The bottom of the working cylinder 4 is connected to a fixing seat 41 via multiple sets of bolts. A base 5 is installed at the bottom of the fixing seat 41. The base 5 is connected to the core tube 52 via a connecting groove 51.

[0023] A movable rod 6 is provided in the working cylinder 4, the bottom of the movable rod 6 is fixedly connected to a piston 7, the top of the movable rod 6 is fixedly connected to a support rod 8, the end of the support rod 8 away from the movable rod 6 is fixedly connected to a threaded rod 81, a threaded sleeve 84 is threadedly connected on the threaded rod 81, the end of the threaded rod 81 away from the support rod 8 extends to the outside of the working cylinder 4 and is fixedly connected to a connecting plate 82, and the connecting plate 82 is fixedly connected to a pressure rod 83 through two connecting rods.

[0024] Two positioning pins 53 are symmetrically arranged on the base 5 , a thread groove is provided on the inner wall of the connecting groove 51 , and an external thread is provided on the outer wall of the core tube 52 , and the thread groove corresponds to the size of the external thread.

[0025] The core tube 52 is connected to the bottom of the base 5 through the provided thread groove and external thread, and the positioning pin 53 extends into the thread groove and abuts against the side wall of the core tube 52, further fixing the core tube 52, ensuring the stability of the connection and preventing the core tube 52 from shaking during the sampling process.

[0026] Among them, the working cylinder 4 and the fixed seat 41 have a movable cavity 42 in their interior, and the movable rod 6 is vertically arranged in the movable cavity 42. The working cylinder 4 and one side of the fixed seat 41 have a slide groove 43 in their interior, and the support rod 8 is arranged in the slide groove 43, and the width of the support rod 8 is equal to the width of the slide groove 43.

[0027] Reference Figure 2 By setting the support rod 8 to contact the side wall of the slide groove 43, it can play a certain limiting role on the support rod 8, ensuring that the support rod 8 maintains vertical movement and improving the stability of the movable rod 6 when moving.

[0028] The bottom of the movable rod 6 extends into the core tube 52 , the piston 7 is disposed in the core tube 52 , and the diameter of the piston 7 is equal to the diameter of the core tube 52 .

[0029] By pressing the pressure rod 83 downward, the movable rod 6 is driven to move synchronously, and the piston 7 moves in the core tube 52, so that the lower surface of the piston 7 is pressed against the sample inside the core tube 52, thereby compacting the sample. The sample will expand as a whole due to compression, thereby increasing the friction between it and the inner wall of the core tube 52, avoiding the internal sample from breaking when the core tube 52 is taken out upward, thereby improving the integrity of the taken out sample.

[0030] Furthermore, when processing samples with high humidity, the sample fits tightly against the inner wall of the core tube 52. At this time, when the piston 7 is moved upward, a negative pressure is formed between the inside of the core tube 52 and the bottom of the drilled hole, thereby applying an upward force to the sample inside the core tube 52, facilitating the separation of the sample inside the core tube 52 from the bottom of the sampling hole, ensuring that the sample at the depth taken can be taken out along with the core tube 52, thereby improving the representativeness of the sample.

[0031] Among them, two abutment blocks 85 are symmetrically arranged on the side of the threaded sleeve 84 close to the working cylinder 4, and the width of the two abutment blocks 85 is greater than the width of the slide groove 43. The side walls of the two abutment blocks 85 close to the working cylinder 4 are set to be arc-shaped, and two shift rods 86 are symmetrically arranged on the threaded sleeve 84.

[0032] Reference Figure 3 and Figure 5 By rotating the lever 86 to drive the threaded sleeve 84 to move, the threaded sleeve 84 will move along the direction set by the threaded rod 81, thereby adjusting the distance between the abutment block 85 and the side wall of the working cylinder 4. When the abutment block 85 is separated from the working cylinder 4, the pressure rod 83 can be moved to drive the movable rod 6 to move synchronously to adjust the position of the lower piston 7.

[0033] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A rock and soil exploration sand extractor, comprising a body (1), characterized in that: Extension plates (2) are fixedly connected to both sides of the bottom of the machine body (1), and an operating handle (3) is commonly connected to one end of the two extension plates (2) away from the machine body (1). A working cylinder (4) is provided at the lower end of the machine body (1), and a fixing seat (41) is sleeved on the bottom of the working cylinder (4) through multiple groups of bolts. A base (5) is installed at the bottom of the fixing seat (41), and the base (5) is connected to a core tube (52) through a connecting groove (51) provided therein. A movable rod (6) is provided in the working cylinder (4), the bottom of the movable rod (6) is fixedly connected to a piston (7), the top of the movable rod (6) is fixedly connected to a support rod (8), one end of the support rod (8) away from the movable rod (6) is fixedly connected to a threaded rod (81), a threaded sleeve (84) is threadedly connected to the threaded rod (81), one end of the threaded rod (81) away from the support rod (8) extends to the outside of the working cylinder (4) and is fixedly connected to a connecting plate (82), and the connecting plate (82) is fixedly connected to a pressure rod (83) via two connecting rods.

2. A rock and soil exploration sand sampling device according to claim 1, characterized in that: Two positioning pins (53) are symmetrically arranged on the base (5), a thread groove is provided on the inner wall of the connecting groove (51), and an external thread is provided on the outer wall of the core tube (52), and the thread groove corresponds to the size of the external thread.

3. A rock and soil exploration sand sampling device according to claim 1, characterized in that: The working cylinder (4) and the fixing seat (41) are provided with a movable cavity (42) in common, and the movable rod (6) is vertically arranged in the movable cavity (42).

4. A rock and soil exploration sand collecting device according to claim 1, characterized in that: The working cylinder (4) and one side of the fixing seat (41) are both provided with a sliding groove (43), the support rod (8) is arranged in the sliding groove (43), and the width of the support rod (8) is equal to the width of the sliding groove (43).

5. The rock and soil exploration sand collecting device according to claim 1, characterized in that: The bottom of the movable rod (6) extends into the core tube (52), the piston (7) is arranged in the core tube (52), and the diameter of the piston (7) is equal to the diameter of the core tube (52).

6. A rock and soil exploration sand collecting device according to claim 1, characterized in that: Two abutment blocks (85) are symmetrically provided on one side of the threaded sleeve (84) close to the working cylinder (4), and the widths of the two abutment blocks (85) are both greater than the width of the slide groove (43). The side walls of the two abutment blocks (85) close to the working cylinder (4) are arranged in an arc shape. Two shifting rods (86) are symmetrically provided on the threaded sleeve (84).

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