Soil solution sampling system
By designing a soil solution sampling system including expansion connectors and negative pressure samplers, the problem of small sampling coverage in the prior art is solved, and more comprehensive and accurate soil solution sampling is achieved, reducing detection errors and operating costs.
Patent Information
- Application Number
- CN202421155691.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The existing soil solution sampling method has too small sampling coverage, so it is impossible to fully obtain soil solution information at different depths.
A soil solution sampling system is designed, including a sampling hose and a negative pressure sampler. The sampling hose is connected to the negative pressure sampler through an expansion connector. The pre-filter membrane tube can be buried around the plant root system as needed to ensure stable placement.
Through this system, the sampling range and depth can be easily changed, and soil solution samples that are closer to the real situation can be obtained, detection errors can be reduced, and operation is simple and cost-effective.
Smart Images
Figure CN222800414U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of soil component detection and relates to a soil solution sampling system. Background Art
[0002] Soil solution composition detection is a commonly used detection method in crop science production and agricultural science research. Soil solution is an important component of soil composition. The pH value, osmotic pressure and nutrient composition of the soil solution required for the optimal growth of different plants vary greatly. The soil solution is directly absorbed by the roots of plants and is the source of nutrients for the plant roots. The nutrients in the soil solution are constantly migrating to the roots. At the same time, the physical and chemical properties and nutrient composition of the soil solution are constantly changing due to the influence of the environment, artificial fertilization, pesticides, other plants, microorganisms, etc. Therefore, the detection of soil solution composition is very important for the rational control of watering, fertilization, pesticide application and the evaluation of plant growth status.
[0003] Existing soil solution sampling methods mostly require digging a single hole near the roots of plants or burying a sampling device at depth to obtain soil solution. This results in a small sampling coverage area and makes it impossible to fully obtain soil solution information at different depths. Utility Model Content
[0004] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical solutions:
[0005] A soil solution sampling system, the improvement of which is that the sampler comprises at least one set of sampling hoses and a negative pressure sampler, the sampling hose is connected to the negative pressure sampler through an expansion connector,
[0006] Each set of the sampling hoses includes a pre-filter membrane tube and a tight connection tube. The pre-filter membrane tube can be buried around the plant root system as required, and the length of the pre-filter membrane tube can be freely selected according to the growth range of the plant root system and the soil sampling range;
[0007] One end of the pre-filter membrane tube is an anchoring end, and the other end is connected to the tight connection tube through a sealing ring; the anchoring end can anchor the pre-filter membrane tube in the soil to be sampled, further ensuring that the pre-filter membrane tube is stably placed in the soil to be sampled.
[0008] The expansion connector includes at least one sample liquid inlet, at least one expansion port and a sample liquid outlet, and each of the expansion ports is equipped with a detachable sealing plug;
[0009] Each group of the sampling hoses is detachably connected to the sample liquid inlet of one of the expansion connectors, and the sample liquid outlet can be detachably connected to the negative pressure sampler or the expansion port on another expansion connector.
[0010] In some embodiments, the negative pressure sampler includes a negative pressure generating device and a sample storage cup, and the sample storage cup is detachably connected to the negative pressure generating device.
[0011] In some embodiments, the negative pressure generating device includes a negative pressure sleeve, a negative pressure piston and a handle, one end of the negative pressure piston is cooperatively connected to the negative pressure sleeve, and the other end is connected to the handle;
[0012] A sampling interface is provided on one end of the negative pressure sleeve away from the handle, and the sampling interface is connected to the sample liquid outlet.
[0013] In some embodiments, the anchoring end of the pre-filter membrane tube is provided with an iron filter membrane hose anchor for anchoring one end of the filter membrane hose in the soil.
[0014] In some embodiments, the pre-filter membrane tube is used to filter insoluble particles with a size of 0.22 μm in the soil solution.
[0015] In some embodiments, a perspective window is provided on the sample storage cup, and scale lines are provided around the perspective window for reading the volume of liquid in the sample storage cup.
[0016] In some embodiments, a detachably connected reducer is provided between the tight connection tube and the sample liquid inlet, one end of the reducer is plugged into the tight connection tube, and the other end of the reducer is plugged into the sample liquid inlet.
[0017] In some embodiments, the sample liquid outlet end is provided with a bellows section, and the bellows section can be connected to the sampling interface or the expansion port of another expansion connector in a socket-type connection.
[0018] In some embodiments, the sample liquid outlet is detachably provided with a plug, and when not connected to the negative pressure sampler, the plug can block the sample liquid outlet.
[0019] In some embodiments, the sample storage cup is made of plastic, and the sample storage cup is threadedly connected to the negative pressure sampler.
[0020] Compared with the prior art, the beneficial effects of the present invention are:
[0021] (1) The utility model provides an expansion connector so that the operator can select the number of sampling hoses according to the specific actual conditions such as the size of the plant root system, and can conveniently change the sampling range. Therefore, the soil solution collected by the utility model can be closer to the actual situation.
[0022] (2) The utility model can ensure that each sampling is taken at a fixed position and depth in the soil, which is conducive to eliminating soil solution detection errors.
[0023] (3) The utility model can intuitively estimate the sampling volume through the perspective window and scale lines on the sample storage cup.
[0024] (4) The utility model generates negative pressure sampling manually, which is simpler to operate, more convenient to carry and lower in cost compared to other common electric soil solution sampling systems. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of the soil solution sampling system of the utility model.
[0026] Figure 2 for Figure 1 Schematic diagram of the structure of the expanded connector.
[0027] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.
[0028] Figure 4 It is a structural schematic diagram of an expansion connector in another embodiment of the utility model.
[0029] Figure 5 It is a structural schematic diagram of an expansion connector in yet another embodiment of the present utility model.
[0030] Figure 6 for Figure 1 Schematic diagram of the enlarged structure at point B in the middle.
[0031] Figure 7 This is a usage state diagram of the utility model.
[0032] Description of reference numerals:
[0033] 1. Sampling hose; 2. Negative pressure sampler; 3. Expansion connector; 4. Reducer; 5. Sampling soil; 6. Plant root system;
[0034] 11. Pre-filter membrane tube; 12. Tight connection tube; 13. Sealing ring; 14. Filter membrane hose anchor;
[0035] 21. Negative pressure generating device; 22. Sample storage cup; 211. Negative pressure sleeve; 212. Negative pressure piston; 213. Handle; 214. Sampling interface; 221. Perspective window; 222. Scale line;
[0036] 31. Sample liquid inlet; 32. Sample liquid outlet; 33. Expansion port; 34. Sealing plug; 35. Bellows section; 36. Blocking piece.
[0037] The direction indicated by the arrow in the figure is the flow direction of the sample liquid. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.
[0039] like Figure 1 and Figure 7 As shown, a soil solution sampling system provided by the present invention is provided. The sampler includes a sampling hose 1 and a negative pressure sampler 2. And the sampling hose 1 and the negative pressure sampler 2 are detachably connected together by an extension connector 3. In the sampler, at least one group of sampling hoses 1 is provided, and each group of sampling hoses 1 includes a pre-filter membrane tube 11 and a tight connection tube 12. The pre-filter membrane tube 11 can be buried around the plant root system 6 as needed, and the length of the pre-filter membrane tube 11 can be freely selected according to the growth range of the plant root system 6 and the range of soil sampling required. When in use, the pre-filter membrane tube 11 needs to be completely buried in the sampling soil 5, a part of the tight connection tube 12 is buried in the sampling soil 5, and the other part leaks out of the sampling soil 5 and is connected to the extension connector 3.
[0040] like Figure 1 , Figure 3 and Figure 7 As shown, one end of the pre-filter membrane tube 11 is an anchoring end, and the other end is connected to the tight connection tube 12 through a sealing ring 13. The anchoring end can anchor 14 the pre-filter membrane tube 11 in the soil to be sampled, further ensuring that the pre-filter membrane tube 11 is stably placed in the sampled soil 5.
[0041] In some preferred embodiments, the pre-filter membrane tube 11 and the tight connection tube 12 are both connected to the sealing ring 13 by a socket connection to improve the operation efficiency.
[0042] like Figure 2 , Figure 4 and Figure 5 As shown, the expansion connector 3 includes at least one sample liquid inlet 31, at least one expansion port 33 and a sample liquid outlet 32, and each expansion port 33 is equipped with a detachable sealing plug 34. When the expansion port 33 is not connected to other expansion connectors 3, the expansion port 33 is sealed with the sealing plug 34, which will not affect the operation of the right end negative pressure sampler 2.
[0043] Furthermore, if Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, each set of sampling hoses 1 is detachably connected to a sample liquid inlet 31 of an extension connector 3 , and the sample liquid outlet 32 on the extension connector 3 can be detachably connected to the negative pressure sampler 2 or an extension port 33 on another extension connector 3 .
[0044] When the sample liquid outlet 32 of the extension connector 3 is connected to the negative pressure sampler 2 , the sample liquid flow path in the sampling hose 1 connected to the extension connector 3 is: sample liquid inlet 31 —sample liquid outlet 32 —negative pressure sampler 2 .
[0045] When the sample liquid outlet 32 of the extension connector 3 is connected to the extension port 33 on another extension connector 3, the sample liquid flow path in the sampling hose 1 connected to the extension connector 3 is: sample liquid inlet 31—sample liquid outlet 32—extension port 33 of another extension connector 3—negative pressure sampler 2.
[0046] In some embodiments, if the sampling range is large or more sample liquids at different soil depths need to be obtained, more sampling hoses 1 need to be buried, and multiple expansion connectors 3 may need to be connected to each other. At this time, the flow path of the sample liquid in the final sampling hose 1 will have an additional path of the expansion connector 3 in the above-mentioned flow path, and finally merge into the negative pressure sampler 2. Therefore, by providing expansion connectors 3 that can be connected to each other, it is possible to obtain as much sample liquid range as possible with one negative pressure sampler 2.
[0047] Furthermore, if Figure 4 As shown, the number of sample liquid inlets 31 on each expansion connector 3 is two, and the number of expansion port 33 is one. The expansion connector 3 can simultaneously connect two groups of sampling hoses 1 and be externally connected to another expansion connector 3 .
[0048] Furthermore, if Figure 5 As shown, the number of sample liquid inlets 31 on each expansion connector 3 is set to three, and the number of expansion ports 33 is set to two. The expansion connector 3 can simultaneously connect to three groups of sampling hoses 1 and be externally connected to two other expansion connectors 3 .
[0049] In practical applications, a suitable expansion connector 3 can be selected according to the sampling range required to obtain the sample liquid efficiently. At the same time, the length of the sampling hose 1 can also be selected according to actual conditions to ensure that the sample liquid acquisition range is large enough.
[0050] In some embodiments, Figure 1 As shown, the negative pressure sampler 2 includes a negative pressure generating device 21 and a sample storage cup 22 , and the sample storage cup 22 is detachably connected to the negative pressure generating device 21 .
[0051] Furthermore, the negative pressure generating device 21 includes a negative pressure sleeve 211, a negative pressure piston 212 and a handle 213. One end of the negative pressure piston 212 is connected to the negative pressure sleeve 211, and the other end is connected to the handle 213. A sampling interface 214 is provided on the negative pressure sleeve 211 at one end away from the handle 213, and the sampling interface 214 is connected to the sample liquid outlet 32.
[0052] In some preferred embodiments, Figure 1 As shown, the anchoring end of the front filter membrane tube 11 is provided with an iron filter membrane hose anchor 14 for anchoring one end of the filter membrane hose in the sampling soil 5 .
[0053] In some preferred embodiments, Figure 1 As shown, the pre-filter membrane tube 11 is used to filter insoluble particles with a size of 0.22 μm in the soil solution.
[0054] Furthermore, if Figure 1 As shown, a perspective window 221 is provided on the sample storage cup 22, and scale lines 222 are provided around the perspective window 221. When the sample liquid is poured into the sample storage cup 22, the operator can see the liquid level position from the perspective window 221 and compare it with the scale lines 222 around it to conveniently and intuitively read the liquid volume in the sample storage cup 22.
[0055] In some preferred embodiments, Figure 6 As shown, a detachably connected reducer 4 is provided between the tight connection tube 12 and the sample liquid inlet 31, one end of the reducer 4 is plugged into the tight connection tube 12, and the other end is plugged into the sample liquid inlet 31. The reducer 4 can solve the problem that the tight connection tube 12 of different diameters cannot be adapted to the sample liquid inlet 31 of the extended connector 3. And the size of the reducer 4 can also be selected according to actual needs.
[0056] In some preferred embodiments, Figure 2 , Figure 4 and Figure 5 As shown, a bellows section 35 is provided at the end of the sample liquid outlet 32, and the bellows section 35 can be connected to the sampling interface 214 or the expansion port 33 of another expansion connector 3 by a socket connection. The bellows section 35 can improve the plug-in efficiency, and because the bellows section 35 is elastic, the plug-in adaptability to interfaces of different diameters can be improved.
[0057] In some preferred embodiments, Figure 2 , Figure 4 and Figure 5 As shown, a sealing member 36 is detachably provided at the end of the sample liquid outlet 32 . When not connected to the negative pressure sampler 2 , the sealing member 36 can seal the sample liquid outlet 32 to prevent the external environment from contaminating the sample liquid.
[0058] In some preferred embodiments, the sample storage cup 22 is made of plastic, and the sample storage cup 22 is threadedly connected to the negative pressure sampler 2 .
[0059] The present invention will be further described below with reference to specific embodiments. Figure 1-Figure 7 As shown, the use process of a soil solution sampling system is as follows:
[0060] First, the operator needs to select the length range of the pre-filter membrane tube 11 and the tight connection tube 12 according to the growth range of the roots of the plants to be tested and the depth of the soil to be tested, and also needs to determine how many sets of sampling hoses 1 are needed. Figure 7 As shown, in this embodiment, the operator selects two groups of sampling hoses 1 and buries them around the plant root system 6 in two layers.
[0061] The embedding process is as follows: first lay the bottom pre-filter membrane tube 11, horizontally coil the pre-filter membrane tube 11, preferably the coiling range can cover the plant root system 6, then insert the filter membrane hose anchor 14 into the soil matrix to fix it, then connect the tight connection tube 12 with the pre-filter membrane tube 11 through the sealing ring 13 (here it can also be connected in advance as needed), at this time, a part of the tight connection tube 12 is placed in the sampling soil 5, and the other end is exposed outside the surface of the sampling soil 5. Next, put the plant roots in, and fill the soil at the same time, after filling the soil to the required height, horizontally coil the pre-filter membrane tube 11 of the second group of sampling hoses 1, then insert the filter membrane hose anchor 14 into the sampling soil 5 matrix to fix it, and the coiling range can cover the plant root system 6, then connect the tight connection tube 12 with the pre-filter membrane tube 11 through the sealing ring 13 (here it can also be connected in advance as needed), at this time, a part of the tight connection tube 12 is placed in the sampling soil 5, and the other end is exposed outside the surface of the sampling soil 5. Finally, fill the soil. After burying, the tightly connected tubes 12 of the two sets of sampling hoses 1 should leak out of the surface of the sampling soil 5 for a distance, and this distance is suitable for convenient connection of the expansion connector 3 and the negative pressure sampler 2.
[0062] When sampling is needed, the operator can connect the exposed tight connection tube 12 with the expansion connector 3 and the negative pressure sampler 2, and then manually hold the negative pressure sleeve 211 and the negative pressure piston 212, and use fingers to pull the negative pressure piston 212 back and forth, driving the one-way valve of the negative pressure sleeve 211 to discharge the air in the negative pressure sampler 2 and generate negative pressure. Correspondingly, negative pressure is also formed in the sampling hose 1 connected thereto. The solution in the sampled soil 5 flows into the pre-filter membrane tube 11 under the action of negative pressure. When the negative pressure is large enough, more and more sample liquid precipitates from the sampled soil 5 and flows into the sample storage cup 22. The flow direction of the sample liquid is as follows: Figure 1 and Figure 7 Flow in the direction shown in .
[0063] When the sampling is finished, the operator can seal the exposed tight connection tube 12 with the plugging member 36. When the next sampling is to be performed, the plugging member 36 is opened and the above-mentioned sampling operation can be repeated.
[0064] Furthermore, when only one set of sampling hoses 1 is needed in the use environment, the expansion port 33 on the expansion connector 3 can be plugged with a sealing plug 34 to maintain the negative pressure in the tube during use.
[0065] When encountering plants with well-developed root systems and needing to obtain surrounding soil solutions in a larger range, multiple sets of sampling hoses 1 can be connected through expansion connectors 3. When more sets of sampling hoses 1 are needed, expansion connectors 3 with multiple sample liquid inlets 31 can be selected or multiple expansion connectors 3 can be used simultaneously.
[0066] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.
Claims
1. A soil solution sampling system, characterized in that: The sampler includes at least one set of sampling hose and negative pressure sampler, wherein the sampling hose is connected to the negative pressure sampler through an expansion connector. Each group of the sampling hoses comprises a pre-filter membrane tube and a tightly connected tube, one end of the pre-filter membrane tube is an anchoring end, and the other end is connected to the tightly connected tube through a sealing ring; The expansion connector includes at least one sample liquid inlet, at least one expansion port and a sample liquid outlet, and each of the expansion ports is equipped with a detachable sealing plug; Each group of the sampling hoses is detachably connected to the sample liquid inlet of one of the expansion connectors, and the sample liquid outlet can be detachably connected to the negative pressure sampler or the expansion port on another expansion connector.
2. The soil solution sampling system according to claim 1, characterized in that: The negative pressure sampler comprises a negative pressure generating device and a sample storage cup, and the sample storage cup is detachably connected to the negative pressure generating device.
3. The soil solution sampling system according to claim 2, characterized in that: The negative pressure generating device comprises a negative pressure sleeve, a negative pressure piston and a handle, one end of the negative pressure piston is cooperatively connected with the negative pressure sleeve, and the other end is connected with the handle; A sampling interface is provided on one end of the negative pressure sleeve away from the handle, and the sampling interface is connected to the sample liquid outlet.
4. The soil solution sampling system according to any one of claims 1 to 3, characterized in that: The anchoring end of the front filter membrane tube is provided with an iron filter membrane hose anchor for anchoring one end of the filter membrane hose in the soil.
5. The soil solution sampling system according to claim 4, characterized in that: The pre-filter membrane tube is used to filter insoluble particles with a size of 0.22 μm in the soil solution.
6. The soil solution sampling system according to claim 2, characterized in that: The sample storage cup is provided with a perspective window, and scale lines are provided around the perspective window for reading the volume of the liquid in the sample storage cup.
7. The soil solution sampling system according to claim 6, characterized in that: A detachably connected reducing tube is provided between the tightly connected tube and the sample liquid inlet, one end of the reducing tube is plugged into the tightly connected tube, and the other end is plugged into the sample liquid inlet.
8. The soil solution sampling system according to claim 3, characterized in that: The sample liquid outlet end is provided with a bellows section, and the bellows section can be connected with the sampling interface or the expansion port of another expansion connector in a socket connection.
9. The soil solution sampling system according to claim 8, characterized in that: The sample liquid outlet end is detachably provided with a blocking piece, and when not connected to the negative pressure sampler, the blocking piece can block the sample liquid outlet.
10. The soil solution sampling system according to claim 2, characterized in that: The sample storage cup is made of plastic, and the sample storage cup is threadedly connected to the negative pressure sampler.