CN208140699U - It is a kind of for measuring the device of soil available nitrogen - Google Patents

Abstract

The utility model relates to a kind of for measuring the device of soil available nitrogen comprising reaction flask, interconnecting piece, boric acid absorption bottle, the first threaded cap, liquid-feeding tube and the second threaded cap；For accommodating soil and sodium hydroxide solution in the reaction flask, reaction flask body portion is connected to by the interconnecting piece with the body portion of the boric acid absorption bottle；The bottle mouth position of the reaction flask is provided with first threaded cap with bottleneck cooperation, and is provided with the liquid-feeding tube in the middle part of first threaded cap；The bottle mouth position of the boric acid absorption bottle is provided with second threaded cap with bottleneck cooperation.The utility model is easy to operate, can improve the real reliability of experimental data, while ensure that higher experiment success rate, uses manpower and material resources sparingly.

Description

A device for measuring soil available nitrogen

technical field

The utility model relates to a soil testing device, in particular to a device for measuring soil available nitrogen.

Background technique

The existing measuring device consists of a glass diffusion dish and frosted glass. The soil sample is placed in the outer chamber of the diffusion dish, and the boric acid absorption solution is placed in the inner chamber. The edge of the outer chamber needs to be coated with gum arabic, then covered with frosted glass, and rotated several times to make the edge of the dish and the ground glass Completely bonded, then gradually turn away the ground glass side, quickly add lye along the slit, immediately cover tightly, and then fix it tightly with a rubber band, shake it gently, and then put it in an incubator for alkaline solution diffusion. However, the existing device often has the problem of experimental failure, for example: when the outer chamber is shaken, the lye is mixed into the inner chamber;

Contents of the invention

In view of the above problems, the purpose of this utility model is to provide a device for measuring soil available nitrogen, which is simple to operate, can improve the authenticity and reliability of experimental data, and at the same time ensure a higher success rate of the experiment and save manpower and material resources.

In order to achieve the above object, the utility model adopts the following technical solutions: a device for measuring soil available nitrogen, characterized in that: the device includes a reaction bottle, a connecting portion, a boric acid absorption bottle, a first screw cap, a liquid feeding pipe and The second screw cap; the reaction bottle is used to accommodate soil and sodium hydroxide solution, and the body of the reaction bottle communicates with the body of the boric acid absorption bottle through the connecting portion; it is located in the reaction bottle The bottle mouth of the bottle is provided with the first threaded cap that matches the bottle mouth, and the middle part of the first threaded cap is provided with the liquid feeding tube; the bottle mouth of the boric acid absorption bottle is provided with a The second threaded cap that fits the mouth.

Further, a valve is arranged on the liquid feeding pipe.

Further, a rubber pad is provided inside the first threaded cap and the second threaded cap.

Further, both the mouth of the reaction bottle and the mouth of the boric acid absorption bottle are provided with external threads that are tightly connected to the screw caps.

Further, both the reaction bottle and the boric acid absorption bottle are wide-mouthed bottles.

Further, the bottom diameter of the reaction bottle is larger than the bottom diameter of the boric acid absorption bottle.

Further, the bottom diameter of the reaction bottle is 70cm, and the bottom diameter of the boric acid absorption bottle is 40cm.

Further, the connecting part is a cylindrical structure, and the lower side wall of the connecting part has a distance from the bottom of the reaction bottle and the boric acid absorption bottle.

Further, the diameter of the cylindrical connecting portion is 25mm.

Further, the distance between the lower side wall of the connecting part and the bottom of the reaction bottle and the boric acid absorption bottle is 35mm.

The utility model has the following advantages due to the adoption of the above technical scheme: 1. The utility model's wide-mouth bottle communicates with the bottom of the bottle at a distance of 35 mm from the bottom of the mouth. When shaking and putting into a constant temperature box, the lye will not flow into the boric acid absorption bottle. 2. The utility model adopts the threaded port and rubber pad structure, which effectively avoids air leakage of contaminated samples. 3. The threaded cap of the utility model is added to the valve, which is more convenient for adding lye. 4. The utility model is easy to operate, can improve the authenticity and reliability of the experimental data, and at the same time ensure a high experimental success rate, avoid repeated testing, and save time, manpower and material resources.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Detailed ways

In the description of the present utility model, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the purpose of It is convenient to describe the utility model and simplify the description, but not to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance. Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

As shown in Figure 1, the utility model provides a device for measuring soil available nitrogen, which is applicable to the measurement of soil available nitrogen (alkaline solution diffusion method). The utility model comprises a reaction bottle 1, a connecting part 2, a boric acid absorption bottle 3, a first threaded cap 4, a liquid feeding pipe 5, a valve 6 and a second threaded cap 7. The reaction bottle 1 is used to accommodate soil and sodium hydroxide (NaOH) solution, and the body of the reaction bottle 1 communicates with the body of the boric acid absorption bottle 3 through the connection part 2 . The bottleneck place that is positioned at reaction bottle 1 is provided with the first screw cap 4 that cooperates with this bottle mouth, and the middle part of the first screw cap 4 is provided with liquid-feeding pipe 5, increases lye in reaction bottle 1 by liquid-feeding pipe 5, The operation of adding lye is more convenient; a valve 6 is arranged on the liquid feeding pipe 5 to prevent the solution in the reaction bottle 1 from flowing out during improper operation. The bottle mouth of the boric acid absorption bottle 3 is provided with a second screw cap 7 matched with the bottle mouth.

In the above embodiment, rubber pads 8 are provided inside the first threaded cap 4 and the second threaded cap 7 , and the sample contamination and air leakage can be effectively avoided through the threaded openings and the rubber pads 8 .

In each of the above embodiments, the mouth of the reaction bottle 1 and the mouth of the boric acid absorption bottle 3 are provided with external threads 9 for tight screw connection with the screw cap.

In each of the above embodiments, the diameter of the bottom of the reaction bottle 1 is much larger than that of the boric acid absorption bottle 3, and both the reaction bottle 1 and the boric acid absorption bottle 3 are wide-mouthed bottles.

In a preferred embodiment, the bottom diameter of the reaction bottle 1 is 70 cm, and the bottom diameter of the boric acid absorption bottle 3 is 40 cm.

In above-mentioned each embodiment, connecting portion 2 is cylindrical structure, and its diameter is preferably 25mm, and the bottom side wall of connecting portion 2 has distance from the bottle bottom of reaction bottle 1 and boric acid absorption bottle 3, and this distance is preferably 35mm .

In summary, when the utility model is in use, the soil sample that has been weighed is placed on the bottom of the reaction bottle 1, and quantitative boric acid absorption liquid is placed in the absorption bottle 3, and then the two rubber pads 8 are respectively packed. Put it into the corresponding first threaded cap 4 and the second threaded cap 7, tighten the reaction bottle 1 and the absorption bottle 3, unscrew the valve 6, add a certain volume of lye, close the valve 6, shake it gently, and then put it into a constant temperature Alkaline solution diffusion in the box. The utility model can effectively avoid the occurrence of sample pollution and air leakage, is simple to operate, improves the authenticity and reliability of experimental data, ensures a high experimental success rate, avoids repeated testing, and saves time, manpower and material resources.

The above-mentioned embodiments are only used to illustrate the utility model, and the structure, size, location and shape of each component can be changed. On the basis of the technical solution of the utility model, all individual components can The improvements and equivalent transformations should not be excluded from the protection scope of the present utility model.

Claims (10)

1. a kind of for measuring the device of soil available nitrogen, it is characterised in that：The device includes reaction flask, interconnecting piece, boric acid suction Receive bottle, the first threaded cap, liquid-feeding tube and the second threaded cap；For accommodating soil and sodium hydroxide solution in the reaction flask, institute Reaction flask body portion is stated to be connected to by the interconnecting piece with the body portion of the boric acid absorption bottle；Positioned at the bottleneck of the reaction flask Place is provided with first threaded cap with bottleneck cooperation, and is provided with the liquid-feeding tube in the middle part of first threaded cap；Position The bottle mouth position of the boric acid absorption bottle is provided with second threaded cap with bottleneck cooperation.

2. device as described in claim 1, it is characterised in that：Valve is provided on the liquid-feeding tube.

3. device as described in claim 1, it is characterised in that：It is provided in first threaded cap and the second threaded cap Rubber pad.

4. such as any one of claims 1 to 3 described device, it is characterised in that：The bottle mouth position of the reaction flask and the boric acid The bottle mouth position of absorption bottle is provided with and the close-connected external screw thread of threaded cap.

5. such as any one of claims 1 to 3 described device, it is characterised in that：The reaction flask and boric acid absorption bottle are all made of extensively Mouth bottle.

6. such as any one of claims 1 to 3 described device, it is characterised in that：The bottom of bottle diameter of the reaction flask is greater than the boron The bottom of bottle diameter of sour absorption bottle.

7. device as claimed in claim 6, it is characterised in that：The bottom of bottle diameter of the reaction flask is 70cm, and the boric acid absorbs The bottom of bottle diameter of bottle is 40cm.

8. such as any one of claims 1 to 3 described device, it is characterised in that：The interconnecting piece is cylinder type, and the company There is distance at bottom of bottle of the lower sides of socket part away from the reaction flask and boric acid absorption bottle.

9. device as claimed in claim 8, it is characterised in that：The interconnecting piece diameter of the cylinder type is 25mm.

10. device as claimed in claim 8, it is characterised in that：The lower sides of the interconnecting piece are away from the reaction flask and boric acid Distance is 35mm at the bottom of bottle of absorption bottle.