CN207908428U - Detect original position and the dystopy detection device of different depth soil pH and Eh - Google Patents

Abstract

The utility model discloses an in-situ and ex-situ detection device for detecting soil pH and Eh at different depths. The clay head is set at the lower end of the straight tube, and the upper end of the straight tube is provided with a rubber plug, and the inner exhaust pipe and the water suction pipe are inserted into the water collecting pipe through the rubber plug, and fixed and sealed by the rubber plug, so that The front end of the inner suction pipe is located in the straight tube and close to the mouth of the straight tube, the front end of the suction tube is located in the clay head and close to the bottom end of the clay head, and the rear end of the suction tube is connected to a set In the water chamber, the outer suction pipe is inserted into the water collection chamber, the detection probe is put into the water collection pipe through the rubber plug, the front end of the detection probe is in the clay head, and the detection probe is connected to the detector. The utility model can realize the in-situ detection, overcome the shortcoming of the out-of-position detection, and at the same time, can satisfy the out-of-position detection.

Description

In-situ and ex-situ detection devices for detecting soil pH and Eh at different depths

technical field

The utility model relates to soil detection, in particular to an in-situ and ex-situ detection device for detecting soil pH and Eh at different depths.

Background technique

At present, the domestic method of soil detection (detection of redox potential and pH) is usually to take soil samples in the field and bring them back to the laboratory to measure the soil redox potential and pH with a platinum electrode, but this method has the following shortcomings: The disturbance to the soil is large; it takes a long time for the platinum electrode to be in contact with the soil to balance and measure the accurate redox potential; when the soil particles in the soil are in contact with the salt bridge, the measurement results will be greatly affected. However, sometimes, due to the experimental needs of the laboratory, it is also necessary to take soil samples back from the field for testing.

At home and abroad, there are no related instruments that can be buried at different depths for in-situ monitoring; the existing instruments are mainly for shallow and relatively large soil moisture detection.

Utility model content

In view of this, the embodiment of the utility model provides a simple, easy to assemble, low cost, can meet different needs, can carry out in-situ detection of soil at different depths under negative pressure conditions, and can take samples for ex-situ detection device.

The implementation of the utility model can provide in-situ and ex-situ detection devices for detecting soil pH and Eh at different depths, including water collection pipes, inner air extraction pipes, outer air extraction pipes, water extraction pipes and detection probes. Straight tube and U-shaped pottery head, the pottery head is unidirectional, the pottery head is set at the lower end of the straight tube, the upper end of the straight tube is provided with a rubber plug, and the inner air suction pipe and the water suction pipe are both pierced The rubber plug is inserted into the water collecting pipe, and fixed and sealed by the rubber plug. The front end of the inner suction pipe is located in the straight tube and is close to the mouth of the straight tube. The front end of the suction tube is located in the In the pottery head, and close to the bottom end of the pottery head, the rear end of the suction pipe communicates with a water collection chamber, the outer suction pipe is inserted into the water collection chamber, and the detection probe is put into the water collection pipe through the rubber plug , the front end of the detection probe is inside the clay head, and the detection probe is connected to a detection meter.

Further, the inner air suction pipe and the water suction pipe are arranged opposite to each other, and the detection probe is arranged inside the inner air suction pipe and the water suction pipe.

Further, the detection probe is connected to the detection meter through an electric wire, one end of the electric wire is connected to the detection probe, the electric wire passes through the rubber plug, and the other end is connected to the detection meter.

Further, the outer side of the electric wire is wrapped with a wire-covered tube, and a sealing ring is provided between the wire-covered tube and the rubber plug to realize fixing and sealing.

Further, the detection meter is a pH/mV meter, the detection probe is a reference electrode and an indicator electrode, and the device can be applied to detect the oxidation-reduction potential and pH of soil.

Further, the reference electrode is a saturated calomel electrode, and the indicator electrode is a graphene/nickel-cobalt oxide composite film electrode.

Compared with the prior art, the utility model has a simple structure and ingenious design; it is easy to assemble and disassemble, has strong practicability and low cost, and can realize in-situ detection and overcome the disadvantages of ectopic detection. Moreover, the device of the utility model maintains a negative pressure, which can reach 0.8 atmospheric pressure, and the oxygen content is low. After the soil solution enters the instrument, direct detection or sample collection can be completed without contact with oxygen.

Description of drawings

Fig. 1 is a schematic diagram of an in-situ and ex-situ detection device for detecting soil pH and Eh at different depths of the present invention.

Fig. 2 is an enlarged view of the rubber stopper in Fig. 1 .

Fig. 3 is a flow chart of in-situ and ex-situ detection by an in-situ and ex-situ detection device for detecting soil pH and Eh at different depths of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the following will further describe the implementation of the utility model in conjunction with the accompanying drawings.

Please refer to Fig. 1, the embodiment of the present utility model provides a kind of in-situ and ex-situ detection device that detects soil pH and Eh at different depths, including water collection pipe 1, inner air extraction pipe 2, outer air extraction pipe 3, water extraction pipe 4, Detection probe 5, rubber plug 6, water collection chamber 7, detection meter 8.

The water collecting pipe 1 includes a straight tube 11 with both ends open and a U-shaped clay head 12. The joint between the straight tube 11 and the clay head 12 is sealed. The lower end of 11, the size of water collecting pipe 1 and the size of each device therein can be adjusted according to actual needs, preferably, the mouth diameter of water collecting pipe 1 is 7cm, and the pipe body length is 24.5cm, and the aperture of pottery clay head 12 is 7cm, length It is 9.8cm.

Please refer to Fig. 2, the rubber plug 6 is arranged on the upper end of the straight tube 11, in order to form a pressure environment to ensure the convenience of pumping, and the size of the rubber plug 6 is compatible with the size of the mouth of the straight tube 11, several holes are drilled on the rubber plug 6 A symmetrical hole 61, in the present embodiment, preferably 4, can be drilled according to actual needs, be respectively used for inserting the inner suction pipe 2, water suction pipe 4 and detection probe 5, and the quantity of hole is consistent with it, After inserting the corresponding inner air extraction pipe 2, water extraction pipe 4 and detection probe 5 into the corresponding holes, a seal is formed, and a seal is also formed between the rubber plug 6 and the straight tube 11, and the holes inserted into the inner air extraction pipe 2 and water extraction pipe 4 are close to the pipe wall, the hole for inserting the detection probe 5 is close to the center, that is, the inner air extraction pipe 2 and the water extraction pipe 4 are relatively arranged, and the detection probe 5 is arranged on the inside of the inner air extraction pipe 2 and the water extraction pipe 4.

The inner suction pipe 2 is inserted into the water collecting pipe 1 through the rubber plug 6, and is fixed and sealed by the rubber plug 6. The front end of the inner suction pipe 2 is located in the straight tube 11 and is close to the straight tube 11. Because the gas is lighter than water, the inner exhaust pipe 2 is close to the mouth of the pipe to facilitate the extraction of gas, so that the water is enriched at the lower end of the air collection pipe 1, and the rear end of the inner exhaust pipe 2 is connected to a power unit (not shown in the figure). The inner pumping pipe 2 is provided with a valve 21, the power unit is started, the valve 21 is opened and the gas in the water collecting pipe 1 can be extracted through the inner pumping pipe 2 .

The water suction pipe 4 is inserted in the water collecting pipe 1 through the rubber plug 6, and fixed and sealed by the rubber plug 6. The front end of the water suction pipe 4 is located in the clay head 12 and is close to the bottom end of the clay head 12. The distance from the bottom is preferably 10cm. Because the gas is lighter than water, the bottom of the water pump 4 near the clay head 12 is convenient to extract the water entering the clay head in time. The water pump 4 is provided with a valve 41.

The water collection chamber 7 communicates with the rear end of the water extraction pipe 4, and the outer air extraction pipe 3 is inserted in the water collection chamber 7. The outer air extraction pipe 3 is provided with a valve 31, and the outer air extraction pipe 3 is connected to a power unit (not shown in the figure). out), start the power unit, open the valve 31 and the gas in the water collection chamber 7 can be extracted through the outer air extraction pipe 3, and then the valve 41 can be opened to extract the gas in the water collection pipe 1.

The detection probe 5 is put into the water collecting pipe 1 through the rubber plug 6, the front end of the detection probe 5 is in the clay head 12, the detection probe 5 is connected to the detection meter 8, preferably, the detection probe 5 is connected to the Detector 8, one end of the electric lead is connected to the detection probe 5, the electric lead passes through the rubber plug 6, and the other end is connected to the tester 8, in order to protect the exposed electric lead, the detection probe 5 is fixed so that it will not swing left and right , the outer side of the electric wire wraps the wire-clad tube 9, the electric wire passes through the position of the rubber plug 6, a sealing ring 10 is arranged between the wire-clad tube 9 and the rubber plug 6, and the sealing ring 10 realizes fixing and sealing.

In the present embodiment, the detector 8 is a pH/mV meter, the detection probe 5 is a reference electrode 51 and an indicator electrode 52, the reference electrode 51 is a saturated calomel electrode, and the indicator electrode 52 is a higher capacitance electrode. Graphene/nickel-cobalt oxide composite thin-film electrode, that is, in this embodiment, the device is applied to detect the redox potential and pH of soil.

Please refer to Figure 3, an in-situ detection method of in-situ and ex-situ detection devices for detecting soil pH and Eh at different depths, including the following steps:

Preparation of the instrument:

S1. Check and correct the detection probe 5, the detection probe 5 is protected in the protection solution in advance;

S2. Put the detection probe 5 into the water collection pipe 1, and install the inner air extraction pipe 2, the water extraction pipe 4, the water collection chamber 7 and the outer air extraction pipe 3, the inner air extraction pipe 2, the water extraction pipe 4 and the outer air extraction pipe 3 Both are equipped with valves, and both the inner air extraction pipe 2 and the outer air extraction pipe 3 are connected to the power device;

S3. Check the airtightness of the device. If the airtightness is not tight, use glue to seal it to ensure that the device is airtight; if the device is airtight, inject the protective liquid of the detection probe 5;

In situ detection:

S4. installing the device in the soil to be tested;

S5. Open the valve 21 on the inner air extraction pipe 2, start the power device of the inner air extraction pipe 2, the inner air extraction pipe 2 pumps air outward, the pressure in the water collection pipe 1 decreases, and the moisture in the soil passes through the one-way conduction under the action of pressure. The clay head 12 enters the water collecting pipe 1 and is enriched in the water collecting pipe 1;

S6. When the water in the water collection pipe 1 is enriched until the detection probe 5 can detect it, close the power device and the valve 21 of the inner air extraction pipe 2, and wait for detection, that is, realize in-situ detection.

After the detection is completed, open the valve on the inner air extraction pipe 2 and the valve on the water extraction pipe 4, and use the outer air extraction pipe 3 to extract the soil aqueous solution into the water collection chamber 7; Probe protection fluid.

After one position is measured, if the next position needs to be detected, the detection probe 5 needs to be pulled out, cleaned, checked and corrected before detection.

Please refer to Figure 3, an ex-situ detection method of in-situ and ex-situ detection devices for detecting soil pH and Eh at different depths, including the following steps:

Preparation of the instrument:

S1. Check and correct the detection probe 5, the detection probe 5 is protected in the protection solution in advance;

S2. Put the detection probe 5 into the water collection pipe 1, and install the inner air extraction pipe 2, the water extraction pipe 4, the water collection chamber 7 and the outer air extraction pipe 3, the inner air extraction pipe 2, the water extraction pipe 4 and the outer air extraction pipe 3 Both are equipped with valves, and both the inner air extraction pipe 2 and the outer air extraction pipe 3 are connected to the power device;

S3. Check the airtightness of the device. If the airtightness is not tight, use glue to seal it to ensure that the device is airtight; if the device is airtight, inject the protective liquid of the detection probe 5;

Alien detection:

S4. installing the device in the soil to be tested;

S5. Open the valve on the outer air extraction pipe 2 and the water extraction pipe 4, start the power unit of the outer air extraction pipe 3, the outer air extraction pipe 3 draws air outwards, the outer air extraction pipe 3 first extracts the air in the water collection chamber 7, and then The air in the water collection pipe 1 is pumped out, the pressure in the water collection pipe 1 decreases, and the moisture in the soil enters the water collection pipe 1 through the one-way pottery clay head 12 under the pressure, and enters the water collection chamber 7 along the water suction pipe 4, Enriched in the water collection chamber 7;

S6. Close the power device and the valve 31 of the outer air extraction pipe 3, close the valve 41 of the water extraction pipe 4, and move the water collection chamber 7 to the position to be detected, that is, to realize abnormal position detection.

After the detection is completed, open the valve on the inner air extraction pipe 2 and the valve on the water extraction pipe 4, and use the outer air extraction pipe 3 to extract the soil aqueous solution into the water collection chamber 7; Probe protection fluid.

After one position is measured, if the next position needs to be detected, the detection probe 5 needs to be pulled out, cleaned, checked and corrected before detection.

The utility model is simple in structure, ingenious in design; easy to assemble, easy to disassemble, strong in practicability, low in cost, can realize in-situ detection, overcome the shortcomings of out-of-position detection, and at the same time, can meet the needs of out-of-position detection. Maintain a negative pressure, which can reach 0.8 atmospheric pressure, and the oxygen content is low. After the soil solution enters the instrument, direct detection or sample collection can be completed without contact with oxygen.

In this article, the orientation words such as front, rear, upper, and lower involved are defined by the parts in the drawings and the positions between the parts in the drawings, just for the clarity and convenience of expressing the technical solution. It should be understood that the use of the location words should not limit the scope of protection claimed in this application.

In the case of no conflict, the above-mentioned embodiments and features in the embodiments herein may be combined with each other.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (5)

1. detecting original position and the dystopy detection device of different depth soil pH and Eh, which is characterized in that including collector pipe, interior pumping Pipe, outer exhaust tube, drinking-water pipe and detection probe, the collector pipe include the straight tube pipe of both ends open and the pot clay end of U-shaped, described Pot clay end is one-way conduction, and the pot clay end is located at the lower end of straight tube pipe, and the upper end of the straight tube pipe is equipped with a rubber stopper, described Interior exhaust tube and drinking-water pipe both pass through the rubber stopper and are inserted in the collector pipe, and fix and seal by rubber stopper, described Interior exhaust tube and drinking-water pipe are oppositely arranged, and the front end of the interior exhaust tube is located in straight tube pipe, and close to the nozzle of straight tube pipe, institute The front end for stating drinking-water pipe is located in the pot clay end, and close to the bottom end of pot clay end, and the rear end connection one of the drinking-water pipe is catchmented Room, the outer exhaust tube are inserted in collecting chamber, and the detection probe is put into across rubber stopper in collector pipe, and the detection probe is set In the inside of interior exhaust tube and drinking-water pipe, the front end of the detection probe is in pot clay end, the detection probe connecting detection meter.

2. the original position and dystopy detection device, feature of detection different depth soil pH according to claim 1 and Eh exist In the detection probe is worn by electric lead connecting detection meter, one end connecting detection probe of the electric lead, the electric lead Cross rubber stopper, other end connecting detection meter.

3. the original position and dystopy detection device, feature of detection different depth soil pH according to claim 2 and Eh exist In envelope curve pipe is wrapped up in the outside of the electric lead, and sealing ring is equipped between the envelope curve pipe and rubber stopper, realizes fixed and close Envelope.

4. the original position and dystopy detection device, feature of detection different depth soil pH according to claim 1 and Eh exist In the detection is calculated as pH/mV meters, and the detection probe is reference electrode and indicator electrode, and described device can apply to detect The oxidation-reduction potential and pH of soil.

5. the original position and dystopy detection device, feature of detection different depth soil pH according to claim 4 and Eh exist In the reference electrode is saturated calomel electrode, and the indicator electrode is graphene/nickel cobalt/cobalt oxide composite film electrode.