CN218994902U - Quick extraction element of nitrate nitrogen suitable for in soil - Google Patents

Abstract

The utility model discloses a device suitable for quick extraction of nitrate nitrogen in soil. The outer periphery of the top of the middle cylinder is provided with a first external thread, the outer periphery of the bottom of the middle cylinder is provided with a second external thread, and the top of the middle cylinder is connected with a top cover. The middle cylinder is connected with the bottom cover, and the center of the top cover is provided with an internal thread channel outward, and the internal thread channel is connected with the outer peripheral thread of the central rod, the top of the central rod is connected with a rotating handle, and the bottom end of the central rod is connected with the center of the central circular plate; the bottom cover There is a water collection channel outward from the center, a first filter net and a second filter net are arranged axially between the middle cylinder body and the bottom cover, a filter membrane is arranged between the first filter net and the second filter net, and the central circular plate It moves downwards and pushes the soil solution downwards and flows out through the first filter screen, the filter membrane and the second filter screen in sequence. Compared with the prior art, the technical solution of the utility model has the advantages of convenient replacement, high efficiency, safety and reliability, etc., and can effectively simplify the operation process and improve the detection efficiency.

Description

A device suitable for rapid extraction of nitrate nitrogen in soil

technical field

The utility model relates to the technical field of nitrate nitrogen measurement in soil, in particular to a device suitable for rapid extraction of nitrate nitrogen in soil.

Background technique

Nitrate nitrogen is an important component in the soil and plant growth process. In the natural environment, nitrate nitrogen will move through the soil or transfer to the lower soil with the water body. Therefore, the amount of nitrate nitrogen in the shallow surface of the soil and the depth of the soil where it is located are too large, which will cause the plants to not absorb it normally. However, if too much nitrate nitrogen concentrates on the soil surface, it will easily cause soil compaction and even cause the death of plants. Therefore, in modern soil science research, in the evaluation system of soil nitrogen supply capacity, in addition to the index of total nitrogen content in the soil, it is also necessary to pay attention to the content of nitrate nitrogen in the soil that is most easily absorbed by crops. The key to the nitrogen supply capacity of the soil is also an important indicator for determining the soil fertilization system.

In the determination of soil nitrate nitrogen content, it is necessary to dissolve the sampled soil in the water body. At the same time, because the soil contains minerals and other particulate matter that cannot be dissolved in water, it is necessary to separate the particulate matter from the solution when extracting the analysis solution. In order to realize the convenient extraction of the solution, and avoid the impact of soil particles on the test results.

In the existing operation, in order to realize the separation of soil and water body conveniently, some operators simply place the filter paper in the filter funnel, and the solution passes through the filter paper due to its own gravity and is collected in the collection container. Although the above operation method is simple, but Filtering by its own gravity, the overall filtration time is too long, and it is easy to cause insufficient filtration because the filter paper is blocked by some soil particles, so the existing soil filtration structure is optimized and improved to improve its filtration efficiency, and It is very necessary to make it more fully filtered.

Utility model content

The main purpose of the utility model is to propose a simple and efficient filtration device suitable for rapid extraction of nitrate nitrogen in soil, aiming at simplifying the operation process and improving the detection efficiency.

In order to achieve the above purpose, the utility model proposes a device suitable for rapid extraction of nitrate nitrogen in soil, which includes a middle cylinder body, a first outer thread is provided on the outer periphery of the top of the middle cylinder body, and a second outer thread is arranged on the outer periphery of the bottom of the middle cylinder body. Thread, the top of the middle cylinder is connected with the top cover, the middle cylinder is connected with the bottom cover, the center of the top cover is provided with an internal thread channel outward, the internal thread channel is connected with the outer peripheral thread of the center rod, the top of the center rod is connected with a rotating handle, and the center rod The bottom end is connected to the center of the central circular plate; the center of the bottom cover is provided with a water collection channel outward, and the first filter net and the second filter net are arranged axially between the middle cylinder and the bottom cover. The first filter net and the second filter net A filter membrane is arranged between the nets, and the central circular plate moves downward and pushes the soil solution downward and flows out through the first filter net, the filter membrane and the second filter net in sequence.

Preferably, both the first filter net and the second filter net respectively include an outer ring body and a filter screen whose edges are embedded in the outer ring body.

Preferably, the filter holes of the first filter screen are larger than the filter holes of the second filter screen.

Preferably, the outer ring bodies of the first filter screen and the second filter screen are made of elastic material, and the end edge of the bottom of the intermediate cylinder is an inner groove structure.

Preferably, an accommodating groove is provided on the outer periphery of the central circular plate, the accommodating groove is snap-connected with the inner side of the sealing lip, and the outer side of the sealing lip is sealingly connected with the inner wall surface of the intermediate cylinder.

The utility model also discloses a device suitable for quick extraction of nitrate nitrogen in soil, which comprises a middle cylinder body, the bottom of the middle cylinder body is sealed and the top is provided with an opening, the outer circumference of the top of the middle cylinder body is provided with a first external thread, The top is threadedly connected with the top cover, and the center of the top cover is provided with an internal thread channel outward, and the internal thread channel is connected with the outer peripheral thread of the central rod, the top of the central rod is connected with a rotating handle, the bottom end of the central rod is fixedly connected with the third filter plate, and the center The center of the bottom end of the rod is provided with an internal threaded hole, the center of the fourth filter screen plate is provided with a central connecting rod which is threadedly connected with the internal threaded hole, and the third filter screen plate and the fourth filter screen plate jointly clamp the filter membrane.

Preferably, the diameter of the filter holes of the third filter plate is smaller than the diameter of the filter holes of the fourth filter plate.

Preferably, a communication pipe is provided on the upper side of the intermediate cylinder outwardly, and the communication pipe can be connected to the output end of the vacuum generator, or the suction solution pipeline passes through the communication pipe and extends into the upper part of the intermediate cylinder to absorb and filter the solution.

Compared with the prior art, the technical solution of the utility model has the following advantages:

The technical scheme of the utility model adopts a filter press structure to squeeze and filter the soil solution, effectively improving the filtration speed and efficiency of the soil particles and the solution, and the structure for clamping the filter membrane can reliably filter the edge of the filter membrane or other It is clamped at the center to avoid edge leakage during the extrusion filtration process, and the connection structure between the filter plate and the filter membrane is squeezed and sealed or easily disassembled, so installation and replacement are more convenient, and the filter plate can also be used to Filter membrane protection, so the overall solution is efficient, safe and reliable.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative work.

Fig. 1 is the part structure exploded view of the extraction device of the utility model embodiment 1;

Fig. 2 is the cross-sectional view of the disassembled structure of the extraction device of the utility model embodiment 1;

Fig. 3 is a partial enlarged view of place A in Fig. 2;

Fig. 4 is a partial enlarged view of place B in Fig. 2;

Fig. 5 is a schematic structural view of the extraction device of Embodiment 2 of the present invention.

Explanation of reference numbers:

1. Intermediate cylinder; 101. First external thread; 102. Second external thread; 2. Top cover; 201. Internal thread channel; 202. Through hole; 3. Bottom cover; 301. Water collection channel; 302. Support 4, center rod; 401, rotating handle; 402, central circular plate; 403, receiving groove; 404, sealing lip; 405, internal thread hole; 5, the first filter screen; 6, filter membrane; 7, the second 2. filter screen; 8. outer circumference ring body; 9. filter screen; 10. third filter screen plate; 11. fourth filter screen plate; 1101. central connecting rod.

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The utility model proposes a device suitable for rapid extraction of nitrate nitrogen in soil.

Example 1

Please refer to Fig. 1 to Fig. 4, the device for quick extraction of nitrate nitrogen in the soil in the embodiment of the utility model includes a middle cylinder 1 connected at both ends, wherein the middle cylinder 1 can be made of transparent material. The outer circumference of the top of the intermediate cylinder 1 is provided with a first external thread 101, the outer circumference of the bottom of the intermediate cylinder 1 is provided with a second external thread 102, and the top of the intermediate cylinder 1 is connected to the top cover 2 in a threaded manner, and the bottom of the intermediate cylinder 1 is connected to the The bottom cover 3 is connected in a threaded manner. In addition, the center of the top cover 2 is provided with an internally threaded passage 201 outward, and the internally threaded passage 201 is threadedly connected with the outer circumference of the central rod 4, so the central rod 4 can move axially relative to the top cover 2 through the internally threaded passage 201, that is, Vertical up and down movement.

In order to move the center rod 4 up and down conveniently, a rotary handle 401 is connected to the top of the center rod 4 in this embodiment, so the operator can rotate the center rod 4 conveniently to realize its up and down movement. The bottom end of the central rod 4 is connected to the center of the central circular plate 402, wherein the central circular plate 402 in this embodiment is a circular plate structure and its surface is not provided with other hollow structures such as through holes, so the central circular plate 402 is a sealing mechanism board structure.

And the center of the bottom cover 3 of this embodiment is provided with a water collecting channel 301 outwards, so the water body can flow out through the water collecting channel 301, and in order to realize the convenient positioning and normal operation of the whole device, the bottom of the bottom cover 3 of this embodiment Several supporting feet 302 are provided to ensure the supporting effect.

Since the technical solution of the utility model is applicable to the rapid extraction device of nitrate nitrogen in soil, the whole solution contains soil and corresponding solution liquid. In order to easily separate the solution from the undissolved particles in the soil, the intermediate cylinder of this embodiment A first filter net 5 and a second filter net 7 are arranged axially between the body 1 and the bottom cover 3 , and a filter membrane 6 is installed between the first filter net 5 and the second filter net 7 . When the operator rotates the central rod 4 to move the central circular plate 402 downward, the soil solution can be pushed downward, and the solution can pass through the first filter 5 , the filter membrane 6 and the second filter 7 to flow downward.

In this embodiment, the first filter net 5 and the second filter net 7 respectively include an outer circumferential ring body 8 and a filter net 9 whose edge is embedded in the outer circumferential ring body. In addition, in order to prevent the sand in the soil from clogging the first filter screen 5 , the filter holes of the first filter screen 5 of the present invention are larger than the filter holes of the second filter screen 7 .

Preferably, in order to improve the reliability of the connection between the middle cylinder 1 and the bottom cover 3 and to ensure the installation reliability of the two filter screens, the outer rings of the first filter screen 5 and the second filter screen 7 in this embodiment 8 is made of elastic material, and the edge of the bottom end of the middle cylinder 1 is an inner groove structure, so after being connected to the bottom cover 3 through the middle cylinder 1, after being squeezed toward the bottom cover 3 through the middle cylinder 1, the Part of the outer ring body 8 of the first filter 5 and the second filter 7 undergoes structural deformation and enters into the interior of the inner groove structure, so as to fully compress and seal reliably between the middle cylinder 1 and the bottom cover 3 .

In addition, in order to realize the airtightness during the downward movement of the central circular plate 402, the outer periphery of the central circular plate 402 in this embodiment is provided with a receiving groove 403, and the receiving groove 403 is connected to the inner side of the sealing lip 404, and the outer side of the sealing lip 404 It can be sealed and connected with the inner wall surface of the intermediate cylinder body 1 .

Please refer to Fig. 1 to Fig. 4, so when the present embodiment is applicable to the rapid extraction of nitrate nitrogen in the soil, a switch can be connected to the bottom of the water collection channel 301, and the corresponding switch can be closed before filtering. And the second filter 7, the filter membrane 6, and the first filter 5 are placed inside the bottom cover 3 in sequence from top to bottom, and then the bottom cover 3 and the middle cylinder 1 are connected in a threaded manner, and then connected to the middle cylinder 1 Add the soil sample to be tested and the corresponding water body to the lower part, and make the water body dissolve the soil as much as possible by stirring.

After the soil is dissolved, the top cover 2 connected to the central circular plate 402 is covered on the top of the middle cylinder 1, and the central circular plate 402 can move downward. When the top cover 2 and the top of the intermediate cylinder 1 are fixedly connected , by rotating the corresponding rotary handle 401 to make the center rod 4 drive the center disc 402 to move down, and at the same time open the switch connected to the bottom of the water collection channel 301, so that the center disc 402 pushes the solution to move down, and the large particles The soil will be intercepted by the first filter 5, and the solution can flow downward through the filter membrane 6, and be collected in the container through the water collection channel 301. In addition, in order to avoid the vacuum phenomenon between the top cover 2 and the central circular plate 402 due to the increasing volume, several through holes 202 may be provided on the surface of the top cover 2 in this embodiment.

Example 2

Please refer to Fig. 5, the quick extraction device applicable to nitrate nitrogen in the soil in the embodiment of the utility model includes an intermediate cylinder body 1, the bottom of the intermediate cylinder body 1 is a sealed structure and the top is provided with an opening, and the top periphery of the intermediate cylinder body 1 There is a first external thread 101, so the top of the middle cylinder 1 can be threadedly connected with the top cover 2, and the center position of the top cover 2 is provided with an internal thread channel 201 outward, so the vertically arranged middle rod 4 can be connected with the internal thread The passages 201 are connected to each other to realize the axial up and down movement. In addition, the top of the central rod 4 is connected with a rotating handle 401 , and the operator can rotate the central rod 4 by rotating the corresponding rotating handle 401 .

In order to achieve convenient filtering, the bottom end of the central rod 4 in this embodiment is fixedly connected with the third filter screen plate 10, wherein the bottom end of the central rod 4 can be fixedly connected with the third filter screen plate 10 by means of welding or the like. . In addition, the bottom end of the central rod 4 is upwardly provided with an internally threaded hole 405, and a fourth filter screen plate 11 is provided below the third filter screen plate 10, and the center of the fourth filter screen plate 11 is also provided with a central connecting rod 1101. The connecting rod 1101 combines the fourth filter screen plate 11 and the third filter screen plate 10 and clamps the filter membrane 6 disposed therebetween. It should be noted that since the filter membrane 6 of this embodiment needs to be clamped between the third filter screen plate 10 and the fourth filter screen plate 11, and the central connecting rod 1101 needs to be connected with the internal threaded hole 405, the filter membrane 6 A corresponding central hole needs to be set at the central position to facilitate the passage of the central connecting rod 1101 . In addition, the relative position of the third filter plate 10 and the fourth filter plate 11 needs to be provided with a corresponding boss structure to clamp and fix the outer peripheral edge of the filter membrane 6 and the edge of the central hole to avoid leakage during the actual filtering process.

In addition, the third filter screen plate 10 and the fourth filter screen plate 11 of this embodiment need not only clamp the filter membrane 6, but also need to properly filter the particulate matter in the solution, so the third filter screen plate 10 set in this embodiment The filter holes are smaller than the filter hole aperture of the fourth filter screen plate 11, so the particles are initially filtered through the fourth filter screen plate 11.

In addition, the upper side of the middle cylinder 1 in this embodiment is provided with a connecting pipe 103 outward, and the connecting pipe 103 can be connected to the output end of the vacuum generator, so that when the soil solution is press-filtered, a certain vacuum environment is generated in the upper space. , to increase the efficiency of the solution for filtration. Or the pipeline for drawing the solution passes through the connecting pipe 103 and extends into the upper part of the intermediate cylinder 1 to realize drawing and filtering the solution conveniently.

Please refer to Fig. 5, when the device for quickly extracting nitrate nitrogen in the soil of the embodiment of the utility model is used for actual operation, the soil sample to be detected is placed in the middle cylinder 1, and stirred evenly after adding the water body, while Make the soil dissolve in the water body as much as possible, and make the nitrate nitrogen precipitate out of the water body. Rotate the fourth filter screen plate 11 downwards away from the third filter screen plate 10, put the filter membrane on the fourth filter screen plate 11, and then connect it to the internal threaded hole 405 through the central connecting rod 1101 to realize the third filter screen plate 10. The four screen plates are connected with the third screen plate.

Putting the above structure into the middle cylinder 1, the top cover 2 has been threadedly connected to the middle cylinder 1, and then by rotating the corresponding rotary handle 401, the central rod 4 drives the third filter screen plate 10, the filter membrane 6 and the fourth filter screen plate 11 move downward together, and the solution is squeezed and passes through the filter membrane 6 to gradually separate out upwards. When squeezing and filtering, a vacuum generating device can be connected to the connecting pipe 103 to improve the filter press efficiency. And adopt the pipeline to pass through the connecting pipe 103 to suck the precipitation solution in the upper part.

The above are only preferred embodiments of the present utility model, and are not therefore limiting the patent scope of the present utility model; /Indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims (8)

1. The device is characterized by comprising a middle barrel, wherein a first external thread is arranged on the periphery of the top of the middle barrel, a second external thread is arranged on the periphery of the bottom of the middle barrel, the top of the middle barrel is connected with a top cover, the middle barrel is connected with a bottom cover, an internal thread channel is outwards arranged in the center of the top cover and is connected with the peripheral thread of a central rod, a rotating handle is connected to the top end of the central rod, and the bottom end of the central rod is connected with the center of a central circular plate; the center of the bottom cover is outwards provided with a water collecting channel, a first filter screen and a second filter screen are axially arranged between the middle cylinder body and the bottom cover, a filter membrane is arranged between the first filter screen and the second filter screen, and the center circular plate moves downwards and pushes soil solution downwards and sequentially passes through the first filter screen, the filter membrane and the second filter screen to flow outwards.

2. The rapid extraction device for nitrate nitrogen in soil according to claim 1, wherein the first filter screen and the second filter screen each comprise a peripheral ring body and a filter screen with edges embedded in the peripheral ring body.

3. The rapid extraction device for nitrate nitrogen in soil of claim 2 wherein the first filter screen has larger pores than the second filter screen.

4. The rapid extraction device for nitrate nitrogen in soil according to claim 3, wherein the outer circumferential ring bodies of the first filter screen and the second filter screen are made of elastic materials, and the end edges of the bottom of the middle cylinder body are of an inner groove structure.

5. The rapid extraction device for nitrate nitrogen in soil according to claim 4, wherein the outer periphery of the central circular plate is provided with a containing groove, the containing groove is connected with the inner side of a sealing lip in a clamping manner, and the outer side of the sealing lip is connected with the inner wall surface of the middle cylinder in a sealing manner.

6. The utility model provides a be applicable to quick extraction element of nitrate nitrogen in soil, a serial communication port, including middle barrel, middle barrel bottom seals and the top is equipped with the opening, middle barrel top periphery is equipped with first external screw thread, middle barrel top links to each other with the top cap screw thread, the top cap center outwards is equipped with the internal thread passageway, the internal thread passageway links to each other with center pole periphery screw thread, center pole top links to each other there is twist grip, center pole bottom and the fixed continuous of third filter screen board, center pole bottom center is equipped with the internal thread hole, fourth filter screen board center is equipped with center connecting rod and links to each other with the internal thread hole screw thread, third filter screen board and fourth filter screen board centre gripping filtration membrane jointly.

7. The rapid extraction device for nitrate nitrogen in soil according to claim 6, wherein the pore size of the third screen plate is smaller than the pore size of the fourth screen plate.

8. The rapid extraction device for nitrate nitrogen in soil according to claim 7, wherein the upper side of the middle cylinder is provided with a communicating pipe outwards, the communicating pipe can be connected with the output end of the vacuum generator, or the suction solution pipeline passes through the communicating pipe and stretches into the upper part of the middle cylinder to suck the filtered solution.

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