Sample preparation device of double-layer sample ring shear apparatus

Abstract

The utility model relates to the technical field of ring shear apparatus sample preparation devices, in particular to a double-layer sample ring shear apparatus sample preparation device. According to the technical scheme, the pressing device comprises a base and a pressing mechanism installed on the base and further comprises an upper pressing head installed on the pressing mechanism and a lower pressing head installed on the base, the bottom face of the upper pressing head is provided with a protrusion and a quick insertion structure, the quick insertion structure is installed on the pressing mechanism, and the upper pressing head and the pressing mechanism are quickly connected through the quick insertion structure. And the thickness control mechanism is installed on the base, and the thickness control mechanism controls the limiting distance of downward movement of the upper pressing head. The sample preparation device can be used for preparing samples with contact surfaces with different roughness and thicknesses, can be used for quickly preparing samples, and is simple to operate. And contact surfaces with different roughness degrees and stress deformation characteristics of upper and lower layer thicknesses are conveniently explored for geotechnical engineering design and construction.

Description

TECHNICAL FIELD

[0001] The utility model relates to ring shear apparatus sample preparation device technical field especially relates to a double -layer sample ring shear apparatus sample preparation device. BACKGROUND

[0002] The slope body instability is closely related to the structure of each layer of the slope body, and the different structures and contact surfaces of the upper and lower layers of the slope body are one of the main factors of the slope body instability. The ring shear apparatus is mainly used for rock and soil mechanics parameter determination, and studies the formation and movement mechanism and prevention of geological disasters such as landslides and debris flows.

[0003] The shear resistance can be improved by dividing the ring shear apparatus circular ring sample into upper and lower layers and controlling the surface roughness of the upper and lower layers, but the existing sample preparation device cannot manufacture compression rings with different surface roughness, so it cannot simulate ring shear samples with different roughness contact surfaces. The thickness of the upper and lower layers cannot be controlled. UTILITY MODEL CONTENT

[0004] The utility model aims at the problems in the background art and provides a double -layer sample ring shear apparatus sample preparation device.

[0005] The technical scheme of the utility model relates to a double -layer sample ring shear apparatus sample preparation device, which comprises a base and a compression mechanism mounted on the base, and further comprises:

[0006] An upper pressing head mounted on the compression mechanism and a lower pressing head mounted on the base, the upper pressing head is provided with a protrusion, the lower pressing head is composed of two semicircles, and the compression mechanism drives the upper pressing head to press the lower pressing head;

[0007] A quick insertion structure mounted on the compression mechanism, the quick insertion structure quickly connects the upper pressing head and the compression mechanism;

[0008] A thickness control mechanism mounted on the base, the thickness control mechanism controls the limit distance of the downward movement of the upper pressing head;

[0009] A separation mechanism mounted on the base and the compression mechanism, the separation mechanism drives the lower pressing head to separate into two parts when the upper pressing head rises.

[0010] Optionally, the compression mechanism comprises slide rods fixedly mounted on both sides of the base, a top plate is fixedly mounted on the slide rods and a pressing plate is slidingly mounted on the slide rods, a lead screw is rotatably mounted on the pressing plate, the lead screw is in threaded connection with the top plate, and a rotating handle is fixedly mounted on the lead screw.

[0011] Optionally, the quick insertion structure comprises a connecting block fixedly installed on the pressing plate, two positioning holes and a connecting hole are arranged on the connecting block, a connecting seat is fixedly installed on the upper pressing head, two positioning rods and a connecting rod are fixedly installed on the connecting seat, a clamping groove is arranged on the connecting rod, a supporting rod is slidably installed on the connecting block, the supporting rod penetrates through one side of the connecting block and extends to the outside of the connecting block, and a first spring is fixedly installed on the supporting rod, and the other end of the first spring is fixedly connected with the connecting block.

[0012] Optionally, the top end of the connecting rod is provided with a chamfer, and the top end of the supporting rod is provided with a round top.

[0013] Optionally, the thickness control mechanism comprises two telescopic rods fixedly installed on one side of the base, a limiting plate is fixedly installed on the telescopic rod, an internally threaded rod is rotatably installed on the base, an adjusting rod is threadedly connected with the internally threaded rod, and the other end of the adjusting rod is fixedly connected with the limiting plate.

[0014] Optionally, the separating mechanism comprises an L-shaped plate fixedly installed on the pressing plate, a driving wheel is rotatably installed on the L-shaped plate, a supporting plate is fixedly installed on the sliding rod, a pressing rod is rotatably installed on the supporting plate, a torsion spring is fixedly installed on the pressing rod, the other end of the torsion spring is fixedly connected with the supporting plate, a guide block is fixedly installed on the sliding rod, a transmission rod is slidably installed on the guide block, guide plates are slidably installed on the two sides of the base, a second spring is fixedly installed on the guide plate, the other end of the second spring is fixedly connected with the sliding rod, an installation plate is fixedly installed on the guide plate, and the lower pressing head is fixed on the installation plate.

[0015] Optionally, one end of the guide plate is a right-angled triangle, and the inclined surface of the right-angled triangle is located below the transmission rod.

[0016] Optionally, rollers are rotatably installed at the two ends of the transmission rod.

[0017] In summary, the present application has at least one of the following beneficial technical effects:

[0018] The rock-soil shear apparatus sample preparation device can prepare samples with different roughness contact surfaces and thicknesses, and can quickly prepare samples and is simple to operate.

[0019] Further, the lower pressing head is provided as two semicircular shapes that can be separated, so that the lower pressing head can be separated, thereby facilitating the removal of the sample in the lower pressing head. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure of the rock-soil shear apparatus sample preparation device is shown.Figure 1 ;

[0021] Figure 2 The structure of the ring shear apparatus sample preparation device is shown Figure 2 ;

[0022] Figure 3 The structure of the ring shear apparatus sample preparation device is shown Figure 3 ;

[0023] Figure 4 The structure of the ring shear apparatus sample preparation device is shown

[0024] Figure 5 The structure of the ring shear apparatus sample preparation device is shown Figure 1 ;

[0025] Figure 6 The structure of the ring shear apparatus sample preparation device is shown Figure 2 .

[0026] The drawing mark: 1, base; 2, slide bar; 201, top plate; 202, pressing plate; 203, screw; 204, turn hand; 3, upper pressing head; 4, lower pressing head; 5, connecting block; 501, positioning hole; 502, connecting hole; 503, connecting seat; 504, positioning rod; 505, connecting rod; 506, clamping groove; 507, support rod; 508, first spring; 6, telescopic rod; 601, limiting plate; 602, internal thread rod; 603, adjusting rod; 7, L plate; 701, driving wheel; 702, support plate; 703, pressing rod; 704, torsional spring; 705, guide block; 706, transmission rod; 707, guide plate; 708, second spring; 709, mounting plate. DETAILED DESCRIPTION

[0027] The technical scheme of the utility model is further described below in combination with the drawings and specific embodiments.

[0028] EMBODIMENT

[0029] As Figures 1 to 3 and Figure 6As shown in the utility model discloses a double -layer sample ring shear apparatus sampling device, including base 1 and install on base 1's compression mechanism, still including install on compression mechanism's upper pressure head 3 and install on base 1's lower pressure head 4, the ground of upper pressure head 3 is equipped with the protrusion, lower pressure head 4 is formed by two semicircles, compression mechanism drives upper pressure head 3 and presses lower pressure head 4. By placing the specified mass of precast soil in lower pressure head 4, then by compression mechanism drives upper pressure head 3 and moves down, make upper pressure head 3 to the soil in lower pressure head 4 inside press, to be able to complete the preparation of sample. And the protrusion on upper pressure head 3 will influence the surface roughness of sample, by replacing the upper pressure head 3 with different protrusions, the surface roughness of sample can be controlled, the protrusion on upper pressure head 3 can be a relief angle or a small dot. The sample after pressing may be bonded to lower pressure head 4, not easy to take out, in the embodiment, lower pressure head 4 is provided as two semicircles that can be separated, lower pressure head 4 can be separated, so that the sample in lower pressure head 4 is easily taken out.

[0030] Further, the compression mechanism includes slide rods 2 fixedly installed on both sides of the base 1, a top plate 201 is fixedly installed on the slide rods 2 and a pressing plate 202 is slidingly installed on the slide rods 2, the pressing plate 202 is rotationally installed with a lead screw 203, the lead screw 203 is threadedly connected with the top plate 201, and a rotating handle 204 is fixedly installed on the lead screw 203. Rotating the rotating handle 204 can drive the lead screw 203 to rotate, the rotating lead screw 203 will move along the axial direction, and thus the pressing plate 202 can be driven to move up and down along the slide rods 2, and thus the upper pressure head 3 can be driven to press downward.

[0031] As Figures 5 to 6 shown, the embodiment further includes a quick insertion structure, the quick insertion structure is installed on the compression mechanism, and the quick insertion structure quickly connects the upper pressure head 3 and the compression mechanism. The quick insertion structure includes a connecting block 5 fixedly installed on the pressing plate 202, two positioning holes 501 and one connecting hole 502 are arranged on the connecting block 5, a connecting seat 503 is fixedly installed on the upper pressure head 3, two positioning rods 504 and one connecting rod 505 are fixedly installed on the connecting seat 503, a clamping groove 506 is arranged on the connecting rod 505, a supporting rod 507 is slidingly installed on the connecting block 5, the supporting rod 507 penetrates through one side of the connecting block 5 and extends to the outside of the connecting block 5, a first spring 508 is fixedly installed on the supporting rod 507, and the other end of the first spring 508 is fixedly connected with the connecting block 5.

[0032] When connecting the upper pressing head 3 with the pressing plate 202, the positioning rod 504 is inserted into the positioning hole 501, and the connecting rod 505 is inserted into the connecting hole 502, at this time, the connecting rod 505 will push the supporting rod 507 to move outward of the connecting block 5, when the supporting rod 507 and the clamping groove 506 are coaxial, the supporting rod 507 will enter the clamping groove 506 under the action of the first spring 508, at this time, the connection is completed, at this time, the positioning rod 504 is circumferentially positioned, and the supporting rod 507 is axially positioned, so that the upper pressing head 3 is fixedly installed on the pressing plate 202, when disassembling, the supporting rod 507 is pulled outward, and the upper pressing head 3 is removed from the pressing plate 202, so that the installation and disassembly of the upper pressing head 3 are facilitated, and the efficiency of replacing the upper pressing head 3 is effectively improved.

[0033] The top end of the connecting rod 505 is provided with a chamfer, and the top end of the supporting rod 507 is provided with a dome. Through the setting of the chamfer and the dome, the connecting rod 505 can exert a lateral force on the supporting rod 507 during the rising process, so as to facilitate the movement of the supporting rod 507 outward of the connecting block 5, and the upper pressing head 3 can be connected with the pressing plate 202 without pulling the supporting rod 507.

[0034] As shown in Figure 3 In the embodiment, a thickness control mechanism is further included, which is installed on the base 1 and controls the limit distance of the downward movement of the upper pressing head 3. The thickness control mechanism includes two telescopic rods 6 fixedly installed on one side of the base 1, a limiting plate 601 fixedly installed on the telescopic rod 6, an internally threaded rod 602 rotatably installed on the base 1, an adjusting rod 603 internally threadedly connected with the internally threaded rod 602, and the other end of the adjusting rod 603 fixedly connected with the limiting plate 601. When the pressing plate 202 abuts against the limiting plate 601, the pressing plate 202 cannot move downward, so that the thickness of the sample can be controlled. When it is necessary to adjust the thickness, the internally threaded rod 602 is rotated to drive the adjusting rod 603 to rise or fall, so as to drive the limiting plate 601 to rise or fall, thereby adjusting the height of the limiting plate 601, and further controlling the thickness of the paper curtain.

[0035] As shown in Figure 1 and Figure 4As shown, the embodiment also includes a separation mechanism mounted on the base 1 and the pressing mechanism, which separates the lower pressing head 4 into two parts when the upper pressing head 3 rises. The separation mechanism includes an L-shaped plate 7 fixedly mounted on the pressing plate 202, a driving wheel 701 rotatably mounted on the L-shaped plate 7, a support plate 702 fixedly mounted on the slide rod 2, a pressing rod 703 rotatably mounted on the support plate 702, a torsion spring 704 fixedly mounted on the pressing rod 703, the other end of the torsion spring 704 being fixedly connected with the support plate 702, a guide block 705 fixedly mounted on the slide rod 2, a transmission rod 706 slidably mounted on the guide block 705, guide plates 707 slidably mounted on the two sides of the base 1, one end of each guide plate 707 being a right-angled triangle, and the inclined surface of the right-angled triangle being below the transmission rod 706. A second spring 708 is fixedly mounted on the guide plate 707, the other end of the second spring 708 being fixedly connected with the slide rod 2, an installation plate 709 is fixedly mounted on the guide plate 707, and the lower pressing head 4 is fixed on the installation plate 709. When the pressing plate 202 descends, the driving wheel 701 will descend, and at this time, the driving wheel 701 will contact the pressing rod 703 and then turn over the pressing rod 703, and at this time, the end of the pressing rod 703 close to the transmission rod 706 will move upward, so that the transmission rod 706 will not move. When the pressing and pressing are completed, the pressing plate 202 moves upward, which will turn over the pressing rod 703, and the end of the pressing rod 703 close to the transmission rod 706 will move downward, so that the transmission rod 706 moves downward, and the downward moving transmission rod 706 will exert a lateral force on the guide plate 707, so as to move the lower pressing head 4 through the installation plate 709, thereby separating the lower pressing head 4.

[0036] When the pressing rod 703 is not affected by the pressing plate 202, the torsion spring 704 will reset the pressing rod 703 under the action of the torsion spring 704, so that the pressing rod 703 remains in a horizontal position, and the second spring 708 resets the lower pressing head 4 under the action of the second spring 708.

[0037] Rollers are rotatably mounted on the two ends of the transmission rod 706. Through the arrangement of the rollers, the friction between the transmission rod 706, the pressing rod 703 and the guide plate 707 can be effectively reduced, and power transmission is facilitated.

[0038] Working principle: by placing the pre-prepared soil of a specified mass in the lower pressing head 4, rotating the handle 204 can drive the pressing plate 202 to move in the upward and downward directions along the slide rod 2, thereby driving the upper pressing head 3 to press downward. The upper pressing head 3 can press the soil in the lower pressing head 4, so that the sample can be prepared.

[0039] When the patterns with different surface roughness are made, different upper pressing heads 3 are selected to be installed, when the upper pressing head 3 is connected with the pressing plate 202, the positioning rod 504 is inserted into the positioning hole 501, and the connecting rod 505 is inserted into the connecting hole 502, when the supporting rod 507 is moved to the coaxial position with the clamping groove 506, the supporting rod 507 will be inserted into the clamping groove 506 under the action of the first spring 508, at this time, the connection is completed, at this time, the upper pressing head 3 is fixedly installed on the pressing plate 202 through the circumferential positioning of the positioning rod 504 and the axial positioning of the supporting rod 507.

[0040] When the pressing plate 202 abuts against the limiting plate 601, the pressing plate 202 cannot be moved downward, so that the thickness of the sample can be controlled, when the thickness needs to be adjusted, the limiting plate 601 can be raised or lowered by rotating the inner threaded rod 602 to drive the adjusting rod 603 to rise or fall, so that the height of the limiting plate 601 is adjusted, and the thickness of the paper curtain can be controlled.

[0041] When the pressing plate 202 is lowered, the driving wheel 701 is lowered, the driving wheel 701 contacts the pressing rod 703, and the pressing rod 703 is flipped, the end of the pressing rod 703 close to the transmission rod 706 is moved upward, so that the transmission rod 706 is not moved, when the pressing and pressing are completed, the pressing plate 202 is moved upward, the pressing rod 703 is flipped, and the end of the pressing rod 703 close to the transmission rod 706 is moved downward, so that the transmission rod 706 is moved downward, the transmission rod 706 is moved downward, and the transmission rod 706 is moved downward, so that the transmission rod 706 is moved downward.

[0042] The above specific embodiments are only several optional embodiments of the present application, based on the technical scheme of the present application and the related inspiration of the above embodiments, those skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. A device for preparing a sample for a double-layered ring shear apparatus, comprising a base (1) and a pressing mechanism mounted on the base (1), characterized in that, Also include: The upper press head (3) installed on the pressing mechanism and the lower press head (4) installed on the base (1), the bottom surface of the upper press head (3) is provided with a convex, the lower press head (4) is composed of two semicircles, the pressing mechanism drives the upper press head (3) to press the lower press head (4); The quick plug structure is installed on the pressing mechanism, and the quick plug structure quickly connects the upper press head (3) with the pressing mechanism; The thickness control mechanism is installed on the base (1), and the thickness control mechanism controls the limit distance of the upper press head (3) moving down; The separation mechanism is installed on the base (1) and the pressing mechanism, and the separation mechanism drives the lower press head (4) to separate into two parts when the upper press head (3) rises.

2. The device for preparing a sample according to claim 1, wherein The pressing mechanism includes a slide rod (2) fixedly installed on both sides of the base (1), a top plate (201) fixedly installed on the slide rod (2) and a pressing plate (202) slidingly installed on the slide rod (2), a lead screw (203) rotatably installed on the pressing plate (202), the lead screw (203) is in threaded connection with the top plate (201), and a rotating handle (204) is fixedly installed on the lead screw (203).

3. The device for preparing a sample for a double- ring shear test according to claim 2, wherein The quick plug structure includes a connecting block (5) fixedly installed on the pressing plate (202), two positioning holes (501) and a connecting hole (502) are arranged on the connecting block (5), a connecting seat (503) is fixedly installed on the upper press head (3), two positioning rods (504) and a connecting rod (505) are fixedly installed on the connecting seat (503), a clamping groove (506) is arranged on the connecting rod (505), a supporting rod (507) is slidingly installed on the connecting block (5), the supporting rod (507) penetrates through one side of the connecting block (5) and extends to the outside of the connecting block (5), a first spring (508) is fixedly installed on the supporting rod (507), and the other end of the first spring (508) is fixedly connected with the connecting block (5).

4. The device for preparing a sample according to claim 3, wherein The top end of the connecting rod (505) is provided with a chamfer, and the top end of the supporting rod (507) is provided with a dome.

5. The double-ring shear apparatus of claim 4, wherein the first and second rings are each formed of a plurality of ring segments. The thickness control mechanism includes two telescopic rods (6) fixedly installed on one side of the base (1), a limiting plate (601) is fixedly installed on the telescopic rod (6), an internally threaded rod (602) is rotatably installed on the base (1), an adjusting rod (603) is in internally threaded connection with the internally threaded rod (602), and the other end of the adjusting rod (603) is fixedly connected with the limiting plate (601).

6. The double-ring shear apparatus of claim 5, wherein the first and second rings are each formed of a plurality of segments. The separating mechanism comprises an L-shaped plate (7) fixedly installed on the pressing plate (202), a driving wheel (701) rotatably installed on the L-shaped plate (7), a supporting plate (702) fixedly installed on the slide rod (2), a pressing rod (703) rotatably installed on the supporting plate (702), a torsion spring (704) fixedly installed on the pressing rod (703), one end of the torsion spring (704) fixedly connected with the supporting plate (702), a guide block (705) fixedly installed on the slide rod (2), a transmission rod (706) slidably installed on the guide block (705), guide plates (707) slidably installed on the two sides of the base (1), second springs (708) fixedly installed on the guide plates (707), the other ends of the second springs (708) fixedly connected with the slide rod (2), mounting plates (709) fixedly installed on the guide plates (707), and the lower pressing head (4) fixed on the mounting plates (709).

7. A device for preparing a sample for a double- ring shear test according to claim 6, wherein One end of the guide plate (707) is a right-angled triangle, and the inclined surface of the right-angled triangle is located below the transmission rod (706).

8. The double-ring shear apparatus of claim 7, wherein the apparatus is configured to shear the sample in the first ring and the second ring simultaneously. Rollers are rotatably installed on the two ends of the transmission rod (706).

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