A semi-automatic soil sediment pore water extractor

Abstract

The present invention provides a semi-automatic soil sediment pore water extractor, comprising a base, a bracket, a pressure device and a plurality of sample chambers, the bracket being fixed on the base, the pressure device being fixed on the upper end of the bracket, all the sample chambers being stacked up and down in sequence and fixed on the base, the sample chamber at the top being arranged below the pressure device, the sample chamber at the top being able to slide into the adjacent sample chamber below it, an upper end cover being embedded at the upper end of each sample chamber and being able to slide up and down, a receiving cavity being arranged inside the upper end cover, each receiving cavity being connected to the adjacent sample chamber above it, and a filter being arranged at the connecting point. The beneficial effects of the present invention are as follows: the present invention is simple to operate, can extract pore water of a plurality of soil samples at the same time, effectively improves the working efficiency and saves the power source of the instrument, and in addition, the punch is automatically pressurized and depressurized by the pressure device, further improving the automation and safety of the experiment.

Description

Technical Field

[0001] The invention relates to the technical field of sediment pore water collection and testing, and in particular to a semi-automatic soil sediment pore water extractor. Background Art

[0002] Pore ​​water is groundwater in the pores between loose sediment particles in rock and soil, and is widely distributed in the strata in accumulation plains and mountain basins. It is an important source of water for industrial, agricultural and domestic use. Effective extraction and collection of rock and soil pore water is of great significance for the prevention and control of groundwater pollution. The squeezing method is currently the most widely used ex situ pore water extraction method.

[0003] Existing sediment pore water squeezing devices, such as the strain-type double-sided drainage rock and soil pore water squeezing instrument provided by utility model patent CN102901805A, rely on manual judgment of the critical pressure value for complete squeezing of soil samples, have strong subjective factors, low degree of automation, consume a lot of manpower, material resources and time, and there are certain risks in the manual pressure relief process.

[0004] How to improve the automation level of pore water extraction by instruments and save the cost of manpower and material resources for experiments is of great significance to the collection and testing of sediment pore water. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a semi-automatic soil sediment pore water extractor.

[0006] An embodiment of the present invention provides a semi-automatic soil sediment pore water extractor, comprising a base, a bracket, a pressure device and a plurality of sample chambers, wherein the bracket is fixed on the base, the pressure device is fixed on the upper end of the bracket, all the sample chambers are stacked up and down in sequence and fixed on the base, the sample chamber located at the top is arranged below the pressure device, the sample chamber located at the top can slide into the adjacent sample chamber below it, an upper end cover that can slide up and down is embedded at the upper end of each sample chamber, a accommodating cavity is provided inside the upper end cover, each accommodating cavity is connected with the sample chamber adjacent to it above, and a filter screen is provided at the connecting point, the pressure device is used to press down the upper end cover at the top so that the upper end cover of each sample chamber squeezes the soil sample inside it, and each upper end cover collects the internal pore water of the adjacent sample chamber above it.

[0007] Furthermore, a bottom cover is provided at the lower end of the sample chamber located at the bottom, and a receiving cavity is provided inside the bottom cover.

[0008] Furthermore, a punch is provided at the lower end of the pressure device, and the punch is located above each of the sample chambers.

[0009] Furthermore, the pressure device includes an air press for driving the punch to press down and a pressure relief component for relieving the pressure of the punch, the air press is connected to an air press controller, the pressure relief component includes a digital display, an acoustic alarm and an electrically controlled on-off valve, the air press controller is electrically connected to the digital display, the acoustic alarm and the electrically controlled on-off valve respectively, and the pressure sensor is electrically connected to the digital display.

[0010] Furthermore, a flat plate is provided at the lower end of the bottom cover, the flat plate is located above the base, and a pressure sensor is provided between the flat plate and the base.

[0011] Furthermore, the upper surface of the flat plate is provided with a groove matching the bottom cover, and the bottom cover is embedded in the groove.

[0012] Furthermore, each of the upper end cover and the upper end of the bottom cover is threadedly connected with a protruding interface, and a hollow channel is provided inside each of the protruding interfaces, and each of the hollow channels is connected to the corresponding accommodating cavity.

[0013] Furthermore, a filter port matching each of the protruding interfaces is provided at the bottom of each of the sample chambers, and the filter net is fixed at the upper end of each of the filter ports.

[0014] Furthermore, the number of the sample chambers is 2-4, and a short handle is symmetrically provided on the outer side of each sample chamber.

[0015] The beneficial effects brought about by the technical solution provided by the embodiments of the present invention are as follows: a semi-automatic soil sediment pore water extractor of the present invention controls the punch to squeeze each of the sample chambers downward through the pressure device, and automatically controls the pressurization and depressurization of the punch in combination with the pressure relief component, thereby completely squeezing the pore water in the soil sample into each of the accommodating cavities; the present invention is simple to operate, can extract pore water from multiple soil samples at the same time, effectively improves work efficiency and saves the power source of the instrument, and in addition, the punch is automatically pressurized and depressurized by the pressure device, further improving the degree of automation and safety of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a semi-automatic soil sediment pore water extractor.

[0017] Figure 2 yes Figure 1 A schematic structural diagram of the middle and upper end cover 5.

[0018] Figure 3 yes Figure 1 Schematic diagram of the structure of the sample chamber 4.

[0019] Figure 41 is a connection diagram of the internal components of the pressure relief component 10.

[0020] In the figure: 1-base, 2-bracket, 3-pressure device, 4-sample chamber, 5-upper end cover, 6-filter screen, 7-bottom cover, 8-accommodating chamber, 9-punch, 10-pressure relief component, 11-air compressor controller, 12-digital display, 13-sound alarm, 14-electrically controlled on-off valve, 15-plate, 16-pressure sensor, 17-protruding interface, 18-hollow channel, 19-filter port, 20-short handle. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0022] Please refer to Figure 1 and Figure 4 An embodiment of the present invention provides a semi-automatic soil sediment pore water extractor, comprising a base 1, a bracket 2, a pressure device 3 and a plurality of sample chambers 4.

[0023] The support 2 is fixed on the base 1, the pressure device 3 is fixed on the upper end of the support 2, and a punch 9 is provided at the lower end of the pressure device 3, the punch 9 is located above each of the sample chambers 4, the pressure device 3 includes an air press (not shown in the drawings) for driving the punch 9 to press down and a pressure relief component 10 for relieving the pressure of the punch 9, the air press is connected to an air press controller 11, the air press controller 11 is used to set the pressure speed and pressure size of the air press, and control the air press to press according to the set pressure speed and pressure size, the The pressure relief component 10 includes a digital display 12, an acoustic alarm 13 and an electrically controlled on-off valve 14. The air compressor controller 11 is electrically connected to the digital display 12, the acoustic alarm 13 and the electrically controlled on-off valve 14, respectively. In this embodiment, when the data displayed by the digital display 12 is the same as the pressure speed set by the air compressor controller 11, the electrically controlled on-off valve 14 issues a stop pressure instruction to the air compressor controller 11 and starts to relieve pressure. At the same time, the punch 9 retracts upward. Once the pressure relief is completed and the punch 9 retracts into place, the acoustic alarm 13 sounds to prompt sampling.

[0024] Please refer to Figure 1 and Figure 2, all sample chambers 4 are stacked up and down and fixed on the base 1 in sequence. The number of sample chambers 4 in the present invention is 2-4, and short handles 20 are symmetrically provided on the outside of each sample chamber 4, and each short handle 20 is used to take and place each sample chamber 4. The sample chamber 4 located at the top is arranged below the pressure device 3, and the sample chamber 4 located at the top can slide into the adjacent sample chamber 4 below it. An upper end cover 5 that can slide up and down is embedded at the upper end of each sample chamber 4, and a receiving cavity 8 is provided inside the upper end cover 5. A bottom cover 7 is provided at the lower end of the sample chamber 4 located at the bottom, and a receiving cavity 8 is also provided inside the bottom cover 7. Each receiving cavity 8 is respectively connected to the sample chamber 4 located above it. In this embodiment, the connection between each upper end cover 5 and the bottom cover 7 and each sample chamber 4 is provided with sealing materials to ensure that the connection between each upper end cover 5 and the bottom cover 7 and each sample chamber 4 is watertight during the experiment.

[0025] Please refer to Figure 1 , Figure 2 and Figure 3 In the present invention, each of the upper end cover 5 and the upper end of the bottom cover 7 are threadedly connected with a protruding interface 17, and each of the protruding interfaces 17 is provided with a hollow channel 18 inside, and each of the hollow channels 18 is connected with the corresponding accommodating cavity 8, and a filter screen 6 is provided at the connecting point. Specifically, a filter port 19 matching the protruding interface 17 is provided at the bottom of each sample chamber 4, and the filter screen 6 is fixed at the upper end of each filter port 19, so that through the cooperation between each protruding interface 17 and each filter port 19, on the one hand, it can effectively ensure that each sample chamber 4 does not deviate laterally during the experiment, and on the other hand, the pore water squeezed out of each sample chamber 4 can flow into each filter port 19, and after being filtered by each filter screen 6, it flows into the corresponding accommodating cavity 8 along each hollow channel 18.

[0026] A flat plate 15 is provided at the lower end of the bottom cover 7, and the flat plate 15 is located above the base 1. A pressure sensor 16 is provided between the flat plate 15 and the base 1, and the pressure sensor 16 is electrically connected to the digital display 12. The pressure sensor 16 is used to obtain the pressure change rate data of the flat plate 15, and transmit the pressure change rate data to the digital display 12 for display. In this embodiment, the upper surface of the flat plate 15 is provided with a groove matching the bottom cover 7 (not drawn in the drawings), and the bottom cover 7 is embedded in the groove.

[0027] The operating method of the present invention is:

[0028] Place each sample chamber 4 filled with soil samples (the soil samples in each sample chamber 4 should not be too full to ensure that each upper end cover 5 and the bottom cover 7 can be fitted with the corresponding sample chamber 4) and each upper end cover 5 and the bottom cover 7 stably on the flat plate 15, and check the sealing between each upper end cover 5 and the bottom cover 7 and each sample chamber 4 to ensure that there is no water leakage. Then, set the pressure speed on the air compressor controller 11, that is, the pressure increase speed applied by the punch 9. Then, the air compressor controller 11 controls the punch 9 to press at the set pressure speed. At this time, the upper end cover 5 located on the uppermost layer is first squeezed by the punch 9, so that the upper end cover 5 located on the uppermost layer transfers the pressure to each upper end cover 5 below it in turn, so that each The soil samples in the sample chamber 4 are all squeezed. During the squeezing process, since the soil samples in each sample chamber 4 are in a drainage state, the pressure increase rate measured by the pressure sensor 16 is relatively small in the initial period of time. After the pore water of all soil samples is squeezed into each accommodating cavity 8, the effective stress of the soil samples in each sample chamber 4 hardly changes. Once the pressure increase rate measured by the pressure sensor 16 is the same as the set pressure increase rate, the electrically controlled on-off valve 14 issues a stop pressure instruction to the air compressor controller 11 and starts to relieve pressure. At the same time, the punch 9 retracts upward. When the pressure relief is completed and the punch 9 retracts into place, the sound alarm 13 sounds to prompt sampling. At this point, the pore water in each accommodating cavity 8 can be taken out for the next experiment.

[0029] A semi-automatic soil sediment pore water extractor of the present invention controls the punch 9 to press each sample chamber 4 downward through the pressure device 3, and automatically controls the pressurization and pressure relief of the punch 9 in combination with the pressure relief component 10, thereby squeezing the pore water in the soil sample into each of the accommodating cavities 8; the present invention is simple to operate, can extract pore water from multiple soil samples at the same time, effectively improves work efficiency and saves the power source of the instrument, and in addition, the punch 9 is automatically pressurized and relieved by the pressure device 3, further improving the degree of automation and safety of the experiment.

[0030] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0031] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A semi-automatic soil sediment pore water extractor, characterized in that: It comprises a base, a bracket, a pressure device and a plurality of sample chambers, wherein the bracket is fixed on the base, the pressure device is fixed on the upper end of the bracket, all the sample chambers are stacked up and down in sequence and fixed on the base, the sample chamber located at the top is arranged below the pressure device, the sample chamber located at the top can slide into the adjacent sample chamber below it, an upper end cover which can slide up and down is embedded on the upper end of each sample chamber, a receiving cavity is arranged inside the upper end cover, each receiving cavity is communicated with the sample chamber adjacent to it above, and a filter screen is arranged at the communicating place, the pressure device is used to press down the upper end cover at the top, so that the upper end cover of each sample chamber squeezes the soil sample inside it, and each upper end cover collects the inner pore water of the adjacent sample chamber above it; A bottom cover is provided at the lower end of the sample chamber located at the bottom, and a receiving cavity is provided inside the bottom cover; A punch is provided at the lower end of the pressure device, and the punch is located above each of the sample chambers; A flat plate is provided at the lower end of the bottom cover, the flat plate is located above the base, and a pressure sensor is provided between the flat plate and the base; The pressure device includes an air compressor for driving the punch to press downward and a pressure relief component for relieving the pressure of the punch, the air compressor is connected to an air compressor controller, the pressure relief component includes a digital display, an acoustic alarm and an electrically controlled on-off valve, the air compressor controller is electrically connected to the digital display, the acoustic alarm and the electrically controlled on-off valve respectively, and the pressure sensor is electrically connected to the digital display; The working process of the pore water extractor is: Stably placing each of the sample chambers filled with soil samples and each of the upper end covers and the bottom cover on the flat plate; Setting the pressure feed speed on the air compressor controller; Once the pressure increase rate measured by the pressure sensor is the same as the set pressure feed rate, the electronically controlled on-off valve issues a stop pressure feed command to the air compressor controller and starts to relieve pressure, and at the same time the punch retracts upward. When the pressure relief is completed and the punch retracts into place, the sound alarm sounds to prompt sampling and take out the pore water in each of the accommodating cavities.

2. A semi-automatic soil sediment pore water extractor as claimed in claim 1, characterized in that: The upper surface of the flat plate is provided with a groove matching the bottom cover, and the bottom cover is embedded in the groove.

3. A semi-automatic soil sediment pore water extractor as claimed in claim 1, characterized in that: Each of the upper end cover and the upper end of the bottom cover is threadedly connected with a protruding interface, and a hollow channel is provided inside each of the protruding interfaces, and each of the hollow channels is communicated with the corresponding accommodating cavity.

4. A semi-automatic soil sediment pore water extractor as claimed in claim 3, characterized in that: The bottom of each sample chamber is provided with a filter port matching each protruding interface, and the filter net is fixed on the upper end of each filter port.

5. A semi-automatic soil sediment pore water extractor as claimed in claim 1, characterized in that: The number of the sample chambers is 2-4, and a short handle is symmetrically provided on the outer side of each sample chamber.

Images