CN207472636U - A kind of quick soil sample device processed of controlling density - Google Patents

Abstract

The utility model discloses a controllable density rapid soil sampler, which comprises a percussion drill. The upper end of the percussion drill extends laterally with a rear handle, and the rear handle is provided with a start switch. The lower part of the percussion drill is provided with a transfer switch and a The horizontal front handle below, the lower end of the impact drill is equipped with a clamp, the clamp is connected with a detachable electric pick rod, the lower end of the electric pick rod is connected with a vibration sample plate of the vertical electric pick rod, and the impact drill is installed with a caliper that can be adjusted up and down , the lower end of the caliper is provided with a vertical caliper identification plate; it also includes a sample preparation cylinder, the sample preparation cylinder includes a base, a compaction cylinder above the base, a cylinder cap above the compaction cylinder, and a cylinder cap located above the base and located The solid cylinder and the fixed rod on the periphery of the cylinder cap, the upper end of the fixed rod passes through the fixed plate on the periphery of the cylinder cap and is locked by a fixed nut. The controllable density rapid soil sampler of the utility model reduces the labor intensity of workers, improves the sample preparation efficiency, has controllable sample density and good uniformity.

Description

A Rapid Soil Sampler with Controllable Density

technical field

The utility model relates to the technical field of construction equipment, in particular to a rapid soil sampler with controllable density.

Background technique

The soil sample is the experimental object of the shear strength experiment and consolidation experiment in the geotechnical experiment. For the laboratory, in addition to the preparation of soil samples for research, the shear strength experiment and consolidation experiment of undergraduates all need cohesive soil. Soil samples (cylindrical clay cakes with a certain density, about 3-4cm high), so a large number of soil samples are needed to carry out experiments in the laboratory. For a standard class, 20 soil cakes (shear resistance and Consolidation), and then make a ring knife sample. In an engineering university with a civil engineering major, about 300 soil samples are needed for undergraduates to complete experiments each year.

The current sample preparation method uses a light compaction instrument, put 500 grams of cohesive soil samples in the compaction cylinder, and then perform 25 times of compaction. After demoulding, the sample soil sample mold blank is made, and it is cut into a ring knife sample for soil. Used in mechanics-related experiments.

When using a light compaction instrument for sample preparation, an old-fashioned compaction instrument must be used. The compaction hammer of the old-fashioned compaction instrument is a hammer with a diameter of 10 cm, which is equivalent to the inner diameter of the compaction cylinder. The soil sample after compaction has a diameter of 10 cm and a height of about A cylinder of 3-4cm. However, after years of use, the current old-fashioned compaction instruments have basically been damaged. When the new compaction instrument is used, the diameter of the compaction hammer is 5cm, and the soil sample is flattened by continuous movement. However, due to manual operation, the surface of the soil sample mold is uneven, which is not conducive to the preparation of the later ring knife sample.

At present, many soil sample mold cakes are made manually, and manual compaction of soil samples is used, which is labor intensive. According to the current production experience, a maximum of 30 soil sample mold cakes can be extracted in 2 hours, and the manual workload is heavy, and it is easy to get tired. , the overall efficiency is low.

Even if the electric compaction machine is used, the efficiency can be improved, but the produced soil sample still cannot overcome the unevenness problem, and because the various parts of the soil sample are not uniformly stressed, the local force on the mold cake of the soil sample is uneven, and the mechanical properties are not uniform. , will definitely affect the experimental results.

Another disadvantage of using a compaction instrument is that it is impossible to prepare soil samples with a specified density. The working properties of various soils are different. Under the same compaction function, the volume after compaction is different, so the density of the prepared soil samples cannot be controlled. , for research experiments, the compressive and shearing properties of the soil under the specified density cannot be carried out.

To sum up, at present, there are mainly the following disadvantages when making soil cakes:

(1) The efficiency of making soil samples is low and the labor intensity is high. At present, a light-duty compaction instrument is commonly used as a mold for making soil cakes. Weigh 500 grams of soil for compaction, manually raise the compaction hammer to 30.5cm, and repeat the compaction 25 times. During the compaction process, the compaction hammer needs to be constantly moved. The position of the compaction cylinder is to make the surface of the compacted soil sample as smooth as possible, and then demoulded to become a soil sample cake, which is used as a soil sample for the consolidation and direct shear instrument. When this method is used to make soil samples, the labor intensity is high and the efficiency is low, and only 30 samples can be made every 2 hours.

(2) When using a light compaction instrument to make soil sample cakes, since the diameter of the compaction hammer is not as large as the compaction cylinder, it is leveled by manual movement, that is, which position is higher and which position is compacted, and the surface of the soil sample cake produced is uneven. , which is not conducive to the later cutting of samples.

(3) The density of the soil sample cannot be controlled. When the soil sample cake is used for scientific research, the Liru direct shear test requires a group of 4 soil samples, and the 4 soil samples require an approximate density. The traditional method of controlling the density is poor, and the density of each soil sample is poor. The density varies greatly.

(4) The uniformity of the sample is poor. When a small compaction hammer is used to prepare samples, since the compaction work per unit area cannot be guaranteed to be uniform, there are differences in the density of various parts of the soil sample, which has a certain impact on the scientific research results.

Utility model content

The purpose of the utility model is to provide a controllable density rapid soil sample device, which reduces the labor intensity of workers, improves the sample preparation efficiency, and has controllable sample density and good uniformity.

In order to achieve the above purpose, the utility model provides a controllable density rapid soil sampler, including an impact drill with three functions of electric pick, electric drill and electric hammer. The upper end of the impact drill extends horizontally with a rear handle. There is a power-on switch. The lower part of the impact drill is provided with a switch for switching three functions and a horizontal front handle located below the switch. The lower end of the impact drill is provided with a clamp, which is connected with a detachable electric pick rod. The lower end is connected with the vibrating sample plate of the vertical electric pick rod, and the caliper that can be adjusted up and down is installed on the impact drill. The compacting cylinder, the cylinder cap arranged above the compacting cylinder, and the fixing rod arranged above the base and on the periphery of the compacting cylinder and the cylinder cap, the upper end of the fixing rod passes through the fixing plate on the periphery of the cylinder cap and is locked by a fixing nut.

As a further improvement of the utility model, the sample preparation cylinder is a light sample preparation cylinder with an inner diameter of 10 cm, a height of the compaction cylinder of 12.7 cm, and a height of the cylinder cap of 5 cm.

As a further improvement of the utility model, the vibrating plate adopts a stainless steel plate with a diameter of 9.8cm and a thickness of 1cm, and the vibrating plate is welded to the lower end of the electric pick bar (the special welding rod of stainless steel is required).

As a further improvement of the utility model, the caliper adopts an electric pick with a 20cm long hexagonal scale, and the front end is ground and welded to the identification plate.

As a further improvement of the utility model, the identification plate is a rectangular plate, 10cm long, 2cm wide, and 0.7cm thick, which includes a 0.5cm thick iron plate at the top and a 0.2cm thick rubber plate at the bottom , The iron plate and the caliper are welded and connected, the size of the rubber plate is the same as that of the iron plate, and the rubber plate is bonded to the iron plate with 502 glue.

As a further improvement of the utility model, the model of the percussion drill is Z1A2-26SE, which uses 220V AC, the output power is 800W, and the single maximum impact force is 3J.

Compared with the prior art, the beneficial effects of the controllable density rapid soil sampler of the present invention are as follows:

(1) Greatly reduce the labor intensity of workers. The electric pick is used as the power. The electric pick is light in weight and convenient for manual operation. Instead of manually lifting the hammer repeatedly to make soil samples, it can greatly reduce the labor intensity of manually lifting the hammer for compaction.

(2) Improve the efficiency of sample preparation. Using the electric vibrator to compact the soil sample, the vibration speed of the electric pick is fast, and the manual preparation time of the soil sample cake is about 1 minute and 20 seconds, while it only takes 15 seconds when the vibration method is used. The average efficiency is about 30 samples in 2 hours when the manual compaction method is used, and 120 samples can be made by 2 people in 2 hours when the vibration method is used.

(3) The sample density is controllable and the uniformity is good. A circular vibrating plate with the same diameter as the sample cylinder is used for compaction, and the sample is formed at one time, and the compaction work on the soil sample is the same, so the soil sample has good uniformity and a smooth surface.

The utility model will become clearer through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the utility model.

Description of drawings

Figure 1 is a schematic diagram of a percussion drill.

Figure 2 is a schematic diagram of the sample preparation cylinder.

Fig. 3 is a schematic diagram of an identification board.

Among them, the impact drill 1, the rear handle 2, the start switch 3, the transfer switch 4, the front handle 5, the clamp 6, the electric pick rod 7, the vibration sample plate 8, the caliper 9, the identification plate 10, the iron plate 10a, the rubber plate 10b, Sample preparation cylinder 11, base 11a, compaction cylinder 11b, cylinder cap 11c, fixing rod 11d, fixing plate 11e, fixing nut 11f.

Detailed ways

Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements.

Please refer to Figures 1-3, the controllable density rapid soil sampler includes an impact drill 1 with three functions: electric pick, electric drill, and electric hammer. The upper end of the impact drill 1 extends horizontally with a rear handle 2. The upper part is provided with a start switch 3, the lower part of the impact drill 1 is provided with a transfer switch 4 for switching three functions and a horizontal front handle 5 located below the transfer switch 4, the lower end of the impact drill 1 is provided with a clamp 6, and the clamp 6 is connected with a The disassembled electric pick bar 7, the lower end of the electric pick bar 7 is connected with a vibration sample plate 8 vertical to the electric pick bar 7. The impact drill 1 is equipped with a caliper 9 that can be adjusted up and down, and the lower end of the caliper 9 is provided with a marking plate 10 that is vertical to the caliper 9; it also includes a sample preparation cylinder 11, and the sample preparation cylinder 11 includes a base 11a and a compaction plate located above the base 11a. The barrel 11b, the barrel cap 11c arranged above the compacting barrel 11b, and the fixing rod 11d arranged above the base 11a and on the periphery of the compacting barrel 11b and the barrel cap 11c, the upper end of the fixing rod 11d passes through the fixing plate on the periphery of the barrel cap 11c 11e and locked by the fixing nut 11f.

The model of the percussion drill 1 is Z1A2-26SE, which adopts hand-held work. It uses 220V AC, the output power is 800W, and the single maximum impact force is 3J. When making the soil sample, the electric pick gear is used, and the percussion drill 1 drives the vibrating sample plate 8 to vibrate slightly up and down to realize the compact soil sample. The vibration model 8 adopts a diameter of 9.8 cm and a circular stainless steel plate with a thickness of 1 cm. The vibration model 8 is welded to the lower end of the electric pick bar 7. Specifically, the head end portion of the front section 2 cm of the electric pick is cut off and ground. Flat, weld the ground end of the electric pick to the center of the circular stainless steel plate. It is necessary to ensure that the electric pick is perpendicular to the circular stainless steel plate and welded firmly. The caliper 9 adopts an electric pick with a 20cm long hexagonal scale, and the front end is ground and welded with the identification plate. The identification plate 10 is a rectangular plate with a length of 10cm, a width of 2cm, and a thickness of 0.7cm. It includes a 0.5cm thick iron plate 10a on the top, a 0.2cm thick rubber 10b on the bottom, an iron plate 10a and a caliper. 9 Welding connection, the size of the rubber plate 10b is the same as that of the iron plate 10a, the rubber plate 10b is bonded to the iron plate 10a with 502 glue, the purpose of pasting the rubber plate is to prevent the identification plate (made of iron) from colliding with the cylinder cap 11c during vibration Makes loud noise. Measure the distance H between the marking plate 10 and the bottom surface of the vibrating sample plate 8, then H-12.7cm is the height after the vibration of the soil sample. The sample preparation cylinder 11 is a light sample preparation cylinder with an inner diameter of 10 cm, a compaction cylinder 11 b with a height of 12.7 cm, and a cylinder cap 11 c with a height of 5 cm.

The steps and methods for making soil sample cakes are as follows:

(1) Making soil sample cakes for student consolidation experiments

The soil cakes used in student experiments do not require density control, but the height of the sample is required to be 3-4cm, which is convenient for cutting a 2cm ring knife sample. The operation steps are as follows:

Weigh 500g of cohesive soil sample, pour it into the compaction cylinder 11b, and use a sweeper to level the surface. Turn on the power of the impact drill 1, turn it on to the gear of the electric pick, put the vibrating plate 8 into the compacting cylinder 11b, turn on the power switch 3, apply a little downward pressure, and the impact drill 1 will drive the vibrating plate 8 to vibrate slightly. The vibrating sample plate 8 vibrates back and forth, and the loose soil in the compacting cylinder 11b is compacted under the action of vibration. The vibrating sample plate 8 stays in the vibration for 15-25s. After demolding, it becomes a soil sample cake, which can be used for the consolidation The ring-knife sample was cut for the knot test.

(2) Make soil cakes with a specified density (there are requirements for density)

Taking the preparation of a density of 1.9g/cm ³ as an example, weigh 500g of cohesive soil sample and pour it into the compaction cylinder, and use a sweeper to level the surface. Calculate the height of the soil sample after compaction according to the inner diameter of the compaction cylinder 11b as 10 cm, and the calculated height should be 3.35 cm. Adjust the position of the caliper 9 and the identification plate 10 so that the distance between the vibrating sample plate 8 and the bottom of the compaction cylinder 11b is 3.35cm. After turning on the electric pick mode, vibrate the sample tightly. When the position of the identification plate 10 reaches the edge of the compaction cylinder 11b, stop beating The real sample, after demoulding, becomes a sample with a specified density. It can be used for the cutting of circular knife samples for undergraduate students' direct shear experiments.

(3) Make a triaxial sample with a specified density

Taking the preparation density of 1.9g/cm3 as an example, the height of the soil sample after compaction is required to be 10cm, and a total of 1492g of soil samples are required. Compaction is divided into three layers, and 498g soil samples are weighed each time, and the height of the soil samples after vibration is 3.33cm. Then carry out sample preparation according to the following steps, weigh 498g soil sample and pour it into the compaction cylinder 11b, adjust the impact drill 1 to the electric pick gear, put the vibrating sample plate 8 into the compaction cylinder 11b, adjust the driving caliper 9 to 3.34cm, and start Impact drill 1, stop vibrating when the scale is reached, take out the vibrating sample plate 8, and scrape the surface with a scraper. Pour in 498g soil sample for the second time, start the device until the scale reaches 6.67cm, take out the vibrating sample plate 8 after the vibration density is completed, and scrape the surface with a scraper; pour 497g soil sample for the third time, start the device until the scale reaches 10cm, and the vibration density is completed After demoulding to complete the sample production.

The working principle of the controllable density rapid soil sampler is as follows:

After putting the loose cohesive soil sample in the sample preparation cylinder 11, gently sweep the soil sample in the sample preparation cylinder 11, hold a light-duty multifunctional electric pick and three-purpose impact drill, and put the vibrating plate fixed on the drill bit into the sample preparation cylinder 11. Turn on the electric pick function, the vibrating sample plate 8 will vibrate slightly up and down under the action of the electric pick, and give a certain pressure to the impact drill 1 when holding it, and the soil sample will be compacted under the action of vibration, replacing the traditional sampling method.

The controllable density rapid soil sampler of the utility model has the following characteristics:

1) Increase cake making efficiency and reduce labor intensity. The light electric pick multi-function machine is used as power instead of labor. The weight of the machine is 3kg, light in weight, compact, easy to move and hand-held. The vibration method is used to make the soil sample template, which can save a lot of lifting hammer and greatly reduce labor. At the same time, when using this method to prepare samples, 120 soil cakes can be produced in 2 hours at the same time, and the efficiency of making soil sample mold cakes is 4 times that of the traditional one, which greatly improves the efficiency of sample preparation. And it adopts the overall stainless steel plate design, one-time molding, and the surface of all the soil-like mold cakes produced is smooth and smooth, which is convenient for making ring knife samples. The problem of slow speed and heavy labor in preparing soil samples in geotechnical experiments is solved, and the device can greatly improve the efficiency of sample preparation and reduce the manual workload at the same time.

2) The controllable density rapid soil sampler also has scalability. There are also many soil samples that need different diameters in the laboratory. If the vibration sample plate 8 in front of the device is changed into a vibration sample plate with a diameter of 4.8cm, and the compacting cylinder 11b with a 5cm diameter can be used to make a soil sample with a diameter of 5cm (according to requirements Soil samples of different heights can be made).

3) Making a soil sample with a specified density (or dry density), that is, the controllability of the density of the soil sample (or the controllability of the dry density). Due to the design of the caliper 9 and the marking plate 10, the depth of the vibrating plate 8 into the soil sample can be effectively controlled, thereby controlling the height and volume of the soil sample, thereby making a soil sample mold cake of a specified density, and the density of the produced soil sample is uniform. It has good performance, and can also make soil samples of different densities by adjusting the caliper 9, which is of great significance for scientific research. When the marking plate 10 reaches the upper edge of the compacting cylinder 11b collar, it means that the soil sample has reached the specified volume and the density meets the requirements, and the vibration can be stopped, and the soil sample mold cake is the soil cake of the specified density. When other density soil samples are needed, the soil sample mold cake of new density can be made by adjusting the scale value of caliper 9 . The problem of uncontrollable density of the specified soil sample in the soil engineering experiment is solved, and the device can prepare the soil sample of the specified density or dry density.

4) Make soil samples with good uniformity. If the diameter is the same as that of the soil cake, the vibration work of each part of the soil sample is the same, and the uniformity of the soil sample is good. The problem of unevenness on the surface of the soil sample cake is solved, which is convenient for making ring knife samples in the later stage.

The utility model has been described above in conjunction with the best embodiments, but the utility model is not limited to the above-disclosed embodiments, but should cover various modifications and equivalent combinations based on the essence of the utility model.

Claims (6)

1. a kind of quick soil sample device processed of controlling density, which is characterized in that including：Have the function of that electric pick, electric drill, three kinds of electric hammer rush Brill is hit, the upper end of impact drill has been laterally extended back handle, and back handle is equipped with startup switch, and the lower part of impact drill is equipped with switching three The change-over switch of kind function and the lateral front hand grip below change-over switch, the lower end of impact drill are equipped with fixture, and fixture connects Dismountable electric pick bar is connected to, the lower end of electric pick bar is connected with the model that shakes of vertical electric pick bar, and being equipped on impact drill can be upper and lower The slide calliper rule of adjusting, the lower end of slide calliper rule are equipped with the marking plate of vertical slide calliper rule；Sample preparation cylinder is further included, sample preparation cylinder includes pedestal, the bottom of set on The compaction cylinder of seat top, the cylinder cap above compaction cylinder and consolidate set on pedestal above and positioned at compaction cylinder and cylinder cap are peripheral Fixed pole, the upper end of fixed link pass through the fixed plate of cylinder cap periphery and are locked by fixing nut.

2. the quick soil sample device processed of controlling density as described in claim 1, it is characterised in that：The sample preparation cylinder is light-duty sample preparation Cylinder, cylinder internal diameter are 10cm, the high 12.7cm of compaction cylinder, the high 5cm of cylinder cap.

3. the quick soil sample device processed of controlling density as described in claim 1, it is characterised in that：The model that shakes is using a diameter of 9.8cm, thickness are the stainless steel plate of 1cm, and shake model and the lower end of electric pick bar are welded to connect.

4. the quick soil sample device processed of controlling density as described in claim 1, it is characterised in that：The slide calliper rule are carried using electric pick Six rib graduated scales of 20cm long, front end polish and are welded to connect with marking plate.

5. the quick soil sample device processed of controlling density as claimed in claim 4, it is characterised in that：The marking plate is rectangular slab, long The rubber of 10cm, wide 2cm, thick 0.7cm, the iron plate including superposed 0.5cm thickness and the 0.2cm thickness positioned at lower part Plate, iron plate are welded to connect with slide calliper rule, and rubber board size is identical with iron board size, and rubber slab is using 502 glue and iron plate Bonding.

6. the quick soil sample device processed of controlling density as described in claim 1, it is characterised in that：The model of the impact drill Z1A2-26SE, uses 220V alternating currents, output power 800W, and single maximum impact force is 3J.