Auxiliary device for sealing and sample pushing of soil sample tubular billet instrument

Abstract

The utility model discloses an auxiliary device for sealing and sample pushing of a soil sample tubular billet instrument. The auxiliary device comprises a piston rod, a container cover and a base, the base is of a cylindrical hollow structure, a circular groove is formed in the middle of the top of the base, and a water through hole is formed in the circular groove; the permeable plate is placed in the circular groove, and the top of the permeable plate is flush with the top of the base; an annular clamping groove is formed in the outer side of the circular groove, and a sealing ring is placed in the annular clamping groove. The bottom of the base communicates with a water inlet-outlet pipe; one side of the base is communicated with an exhaust pipe which is provided with an exhaust valve; a plurality of bolts are arranged at the top of the base; the container cover is of an inverted-T-shaped hollow structure, and a plurality of through holes connected with the bolts in a matched mode are formed in the container cover. The piston rod is inserted into the container cover. The device is simple in structure and easy to operate; under the combined action of the piston rod and the exhaust valve, the sample is exhausted and sealed; and the test soil sample is pushed in and out by using the piston rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of geotechnical test auxiliary devices, and in particular relates to an auxiliary device for sealing a soil sample tube capillary instrument and pushing out a sample. Background Art

[0002] "Water flows to the lowest place" seems to be a law, but in reality, many projects do not necessarily conform to this law. Capillary water is a kind of free water. It is not affected by the electric field attraction of particles. It is distributed in the pores that are interconnected between soil particles. It can be regarded as many capillaries of different shapes and diameters that are interconnected. Capillary water is free water that exists above the groundwater level and is affected by the surface tension at the interface between water and air. Free water in the soil gradually rises from the groundwater level through the tiny channels of the soil. When the groundwater level is shallow, the rise of capillary water will promote the freezing of foundation soil, cause the basement to be damp, and even endanger the foundation of the house, damage the road surface, promote the swamping and salinization of the soil, and then enhance the corrosiveness of groundwater to building materials such as concrete. The capillary rise height plays a pivotal role in engineering. The accuracy of the test results directly affects the rationality of the engineering design parameter values ​​and is related to the safety of the entire engineering construction.

[0003] According to the capillary water rise height test specified in the geotechnical test method standard GB / 50123-2019, for fine sand, silt and clay soil with small capillary water rise height, the test method adopted is the soil sample tube method, and the capillary water rise height is tested by the negative head method. In order to ensure the authenticity of the test data, the sealing of the sample needs to be ensured during the test. The geotechnical test method standard GB / 50123-2019 describes in the test steps that the sample is cut through the soil cutting tube, and the sample is pushed into the glass tube, and the gaps around are sealed with wax to prevent air leakage. This test step is relatively inconvenient. When sealing the sample, the solid wax needs to be melted at high temperature, and there may be safety hazards of scalding during the operation; at the same time, it is difficult to remove the sample from the container after the test. Summary of the invention

[0004] The utility model aims to provide an auxiliary device for sealing and pushing out samples of a soil sample tube capillary instrument, so as to solve the problems of scalding risk during existing test operations and difficulty in taking out samples from containers.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an auxiliary device for sealing and pushing out samples of a soil sample tube capillary instrument, comprising a piston rod, a container cover and a base;

[0006] The base is a cylindrical hollow structure, with a circular groove in the middle of the top, and a water hole is opened on the circular groove; the water-permeable plate is placed in the circular groove, and its top is flush with the top of the base; an annular groove is provided on the outside of the circular groove, and a sealing ring is placed in the annular groove; the bottom of the base is connected to the inlet and outlet pipes; one side of the base is connected to the exhaust pipe, and the exhaust pipe is provided with an exhaust valve; multiple bolts are provided on the top of the base;

[0007] The container cover is arranged on the base; the container cover is an inverted T-shaped hollow structure, and a plurality of through holes connected with bolts are arranged on the container cover; the piston rod is inserted into the container cover.

[0008] Preferably, the bolt is configured as a swing structure, which includes a nut and a screw rod, a washer is sleeved on the screw rod near one end of the nut, and a bearing is provided at the other end of the screw rod, and the bearing is fixed to the top of the base.

[0009] Preferably, the piston rod is composed of a piston shaft, a piston handle fixed at one end of the piston shaft and a rubber pad fixed at the other end of the piston shaft; the piston rod is 10 cm high, the rubber pad is 1 cm thick, and the piston handle is 6 cm long and 0.5 cm thick.

[0010] Preferably, the container cover consists of a circular cover surface at the bottom and a circular tube connected to the circular cover surface, and the through hole is arranged on the circular cover surface; the diameter of the circular cover surface is 12 cm and the height is 2 cm; the diameter of the circular tube is 4 cm, the height is 8 cm, and the wall thickness is 0.5 cm.

[0011] Preferably, the exhaust pipe is located flush with the bottom of the circular groove.

[0012] Preferably, the number of the bolts is 3-5 and they are arranged at equal intervals.

[0013] Preferably, the base has a diameter of 12 cm and a height of 2 cm; the circular groove has a diameter of 4 cm and a depth of 1 cm.

[0014] Preferably, scale lines are provided on the circular tube of the container cover.

[0015] Beneficial effects: The utility model provides a simple structure and is easy to operate. During the test operation, the sample is exhausted and sealed through the joint action of the piston rod and the exhaust valve, eliminating the step of high-temperature wax dissolving and avoiding the safety hazard of high-temperature burns. During the test, the piston rod is used to push the original test, and the pushing function of the piston rod can also be used to prepare a disturbed sample, and the sample can be pushed out of the container cover after the test. During the test, a silicon piezoresistive pressure sensor is connected at the position of the exhaust valve to measure the pore water pressure index in the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model;

[0017] Figure 2 This is a state diagram for use of the utility model;

[0018] Figure 3 is a top view of the base;

[0019] Figure 4 This is a side view of the base (partial);

[0020] Figure 5 is a schematic diagram of a piston rod;

[0021] Figure 6 A top view of the container cover;

[0022] Figure 7 is a schematic diagram of a bolt;

[0023] In the figure: 1-piston rod, 2-container cover, 3-base, 4-rubber pad, 5-piston handle, 6-water inlet and outlet pipes, 7-bolts, 8-piston shaft, 9-exhaust valve, 10-slot, 11-sealing ring, 12-water permeable plate, 13-through hole, 14-circular groove, 15-exhaust pipe, 16-pipe clamp A, 17-water supply cylinder, 18-pipe clamp B, 19-circular cover, 20-circular tube, 21-nut, 22-washer, 23-bearing, 24-screw. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are now described with reference to the accompanying drawings. It will be understood by those skilled in the art that the following embodiments are only used to illustrate the present invention and should not be considered as limiting the scope of the present invention. If no specific technology, connection relationship or condition is indicated in the embodiments, the technology, connection relationship, condition described in the literature in the field or the product specification is used. If the manufacturer of the materials, instruments or equipment used is not indicated, they are all conventional products that can be purchased.

[0025] Combination Figure 1-Figure 6 As shown, the utility model provides an auxiliary device for sealing and pushing out samples of a soil sample tube capillary instrument, comprising a piston rod 1, a container cover 2 and a base 3;

[0026] The base 3 is a cylindrical hollow structure made of alloy material, with a circular groove 14 in the middle of the top, and a water hole is opened on the circular groove 14; the water-permeable plate 12 is placed in the circular groove 14, and its top is flush with the top of the base 3; the outer side of the circular groove 14 is provided with an annular groove 10 with a width of 0.4 cm, and a sealing ring 11 is placed in the annular groove 10; the bottom of the base 3 is connected with an inlet and outlet pipe 6, and the inlet and outlet pipe 6 is connected to the pressure measuring pipe; one side of the base 3 is connected with an exhaust pipe 15, and the exhaust pipe 15 is provided with an exhaust valve 9; 4 bolts 7 are arranged at equal intervals on the top of the base 3; the diameter of the base 3 is 12 cm and the height is 2 cm; the diameter of the circular groove 14 is 4 cm and the depth is 1 cm; the position of the exhaust pipe 15 is flush with the bottom of the circular groove 14;

[0027] The container cover 2 is arranged on the base 3; the container cover 2 is an inverted T-shaped hollow structure, and a plurality of through holes 13 are provided on the container cover 2 to cooperate with the bolts 7; the bolts 7 pass through the through holes 13 and are tightened by nuts to fasten the container cover 2 and the base 3; at this time, the sealing ring 11 placed in the annular groove 10 of the base 3 is squeezed and deformed, and the sealing of the structure is achieved; the piston rod 1 is inserted into the container cover 2 and is movably connected with the container cover 2.

[0028] Specifically, the piston rod 1 consists of a piston shaft 8, a piston handle 5 fixed at one end of the piston shaft 8, and a rubber pad 4 fixed at the other end of the piston shaft 8. The piston rod 1 is inserted into the container cover 2 from one end of the rubber pad 4; the piston rod is 10 cm high, the rubber pad 4 is 1 cm thick, the piston handle is 6 cm long and 0.5 cm thick; the container cover 2 consists of a circular cover surface 19 at the bottom and a circular tube 20 connected to the circular cover surface 19, and the through hole 13 is arranged on the circular cover surface 19; the container cover is made of plexiglass, wherein: the diameter of the circular cover surface 19 is 12 cm and the height is 2 cm; the diameter of the circular tube 20 is 4 cm, the height is 8 cm, and the wall thickness is 0.5 cm.

[0029] In a further optimized solution, the bolt 7 is set as a swing structure, which includes a nut 21 and a screw rod 24. A washer 22 is sleeved on the screw rod 24 near one end of the nut 21, and a bearing 23 is set at the other end of the screw rod 24. The bearing 23 is fixed to the top of the base 3. Figure 7 As shown; scale lines are provided on the circular tube 20 of the container cover 2. Example 1

[0030] An auxiliary device for sealing and pushing out samples of a soil sample tube capillary instrument comprises three parts: a piston core, a container cover and a base. A water-permeable plate 12 is placed in a circular groove 14 in the middle of the base 3, and a sealing ring 11 is placed in a card slot 10; the container cover 2 is placed on the base, and four bolts are tightened to form the base and the container cover as a whole; the exhaust valve 9 on the side of the base 3 is opened, and the prepared cylindrical soil sample is placed in the circular tube on the upper part of the container cover 2, and fixed with a double-opening mold, and the handles at both ends of the piston handle 5 are tightly held with both hands, and the piston handle 5 is steadily pressed down, and the sample is slowly pushed into the container cover 2 to avoid squeezing and disturbing the soil sample, and the air in the container cover is discharged during the pressing process; when the soil sample is pressed down to the bottom and contacts the water-permeable plate 12, the pipe clamp A16 under the water supply cylinder 17 is opened to allow water to slowly rise to the lower part of the sample, and the air in the pipe is discharged until the water flowing out of the exhaust pipe 15 has no bubbles, and the exhaust valve 9 is closed, and the environment of the sample is in a sealed state at this time. After the test, loosen the bolts of the base, remove the container cover, push the sample out through the piston rod, and take the sample out of the container cover. Example 2

[0031] An auxiliary device for sealing and pushing out samples of a soil sample tube capillary instrument comprises three parts: a piston core, a container cover and a base. A water-permeable plate 12 is placed in the circular groove 14 in the middle of the base 3, and a sealing ring 11 is placed in the card slot 10; the container cover 2 is placed on the base, and four bolts are tightened to form the base and the container cover as a whole; the exhaust valve 9 on the side of the base is opened, and a representative air-dried soil sample is weighed according to the required porosity ratio, and poured into the assembled device of the utility model after dispersion, and the handles at both ends of the piston handle 5 are tightly held with both hands, and the piston handle is steadily pressed down until the sample height reaches 8.0 cm. The pipe clamp A16 under the water supply cylinder 17 is opened to allow water to slowly rise to the lower part of the sample, and the air in the pipe is exhausted until there are no bubbles in the water flowing out of the exhaust pipe 15, and the exhaust valve 9 is closed. At this time, the environment in which the sample is located is in a sealed state. After the test, loosen the bolts of the base, remove the container cover, push out the sample through the piston rod, and take the sample out of the container cover. Example 3

[0032] An auxiliary device for sealing and pushing out samples of a soil sample tube capillary instrument comprises three parts: a piston core, a container cover and a base. A water-permeable plate 12 is placed in a circular groove 14 in the middle of the base 3, and a sealing ring 11 is placed in a card slot 10; the container cover 2 is placed on the base, and four bolts are tightened to form the base and the container cover as a whole; the exhaust valve 9 on the side of the base is opened, and the prepared cylindrical soil sample is placed in the circular tube on the upper part of the container cover, and fixed with a double-opening mold, and the handles at both ends of the piston handle 5 are tightly held with both hands, and the piston handle is steadily pressed down, and the sample is slowly pushed into the container cover to avoid squeezing and disturbing the soil sample. During the pressing process, the air in the container cover 2 is discharged; when the soil sample is pressed down to the bottom and contacts the water-permeable plate, the pipe clamp under the water supply cylinder is opened to allow water to slowly rise to the lower part of the sample, and the air in the pipe is discharged until there are no bubbles in the water flowing out of the drain pipe, and the exhaust valve 9 is closed. A silicon piezoresistive pressure sensor is connected to the position of the exhaust valve. When the exhaust valve is opened, the pore water pressure index in the soil can be measured during the test.

[0033] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An auxiliary device for sealing and pushing out samples of soil sample tube capillary instrument, characterized in that: It comprises a piston rod (1), a container cover (2) and a base (3); The base (3) is a cylindrical hollow structure, with a circular groove (14) provided in the middle of the top thereof, and a water hole is provided on the circular groove (14); the water-permeable plate (12) is placed in the circular groove (14), and its top is flush with the top of the base (3); an annular groove (10) is provided on the outside of the circular groove (14), and a sealing ring (11) is placed in the annular groove (10); the bottom of the base (3) is connected to a water inlet and outlet pipe (6); one side of the base (3) is connected to an exhaust pipe (15), and an exhaust valve (9) is provided on the exhaust pipe (15); a plurality of bolts (7) are provided on the top of the base (3); The container cover (2) is arranged on the base (3); the container cover (2) is an inverted T-shaped hollow structure, and a plurality of through holes (13) are provided on the container cover (2) for cooperation with the bolts (7); the piston rod (1) is inserted into the container cover (2).

2. The auxiliary device for sealing and pushing out samples of a soil sample capillary tube instrument according to claim 1 is characterized in that: The bolt (7) is configured as a swing structure, comprising a nut (21) and a screw rod (24); a washer (22) is sleeved on the screw rod (24) near one end of the nut (21); a bearing (23) is disposed at the other end of the screw rod (24); and the bearing (23) is fixed to the top of the base (3).

3. The auxiliary device for sealing and pushing out samples of a soil sample capillary tube instrument according to claim 1 or 2, characterized in that: The piston rod (1) is composed of a piston shaft (8), a piston handle (5) fixed to one end of the piston shaft (8), and a rubber pad (4) fixed to the other end of the piston shaft (8); the piston rod is 10 cm high, the rubber pad (4) is 1 cm thick, and the piston handle is 6 cm long and 0.5 cm thick.

4. The auxiliary device for sealing and pushing out samples of a soil sample capillary tube instrument according to claim 1 or 2, characterized in that: The container cover (2) is composed of a circular cover surface (19) at the bottom and a circular tube (20) connected to the circular cover surface (19); the through hole (13) is arranged on the circular cover surface (19); the diameter of the circular cover surface (19) is 12 cm and the height is 2 cm; the diameter of the circular tube (20) is 4 cm, the height is 8 cm, and the wall thickness is 0.5 cm.

5. The auxiliary device for sealing and pushing out samples of a soil sample capillary tube instrument according to claim 1 or 2, characterized in that: The exhaust pipe (15) is located flush with the bottom of the circular groove (14).

6. The auxiliary device for sealing and pushing out samples of a soil sample capillary tube instrument according to claim 1, characterized in that: The number of bolts (7) is 3-5 and they are arranged at equal intervals.

7. The auxiliary device for sealing and pushing out samples of a soil sample capillary tube instrument according to claim 1, characterized in that: The base (3) has a diameter of 12 cm and a height of 2 cm; the circular groove (14) has a diameter of 4 cm and a depth of 1 cm.

8. The auxiliary device for sealing and pushing out samples of a soil sample capillary tube instrument according to claim 1, characterized in that: Scale lines are provided on the circular tube (20) of the container cover (2).

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