Device for measuring carbonate in soil

Abstract

The utility model discloses a measuring device for soil carbonate, which comprises an air quantity pipe and a communicating pipe connected with the air quantity pipe to form a U shape, a three-way valve is arranged between the communicating pipe and the air quantity pipe, the air quantity pipe is connected with a reaction component, and the measuring device further comprises a liquid adding component connected to the communicating pipe and used for adding liquid into the communicating pipe. The liquid adding device is used for adding gas and liquid into the communicating pipe and comprises a first liquid storage container, a liquid adding pipe connected with the first liquid storage container and the communicating pipe, a pressurizing part used for pressing the gas and liquid in the first liquid storage container into the communicating pipe and a first switch valve arranged on the liquid adding pipe. The liquid adding pipe extends into the first liquid storage container and is in sealing fit with the inner wall of the first liquid storage container. The soil carbonate measuring device provided by the utility model can be used for improving the experiment precision and efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of soil carbonate determination, and particularly relates to a device for determining soil carbonate. Background Technique

[0002] The carbonate content is an important index of soil properties. The amount of carbonate in the soil directly affects the formation of soil aggregates, soil development, and the existence state and effectiveness of soil nutrients, reflecting the environmental quality of the soil.

[0003] In the prior art, the gas volume method (i.e., the soil carbonate determination method of GB9835-88) is usually adopted. The carbonate in the soil sample reacts with hydrochloric acid to generate carbon dioxide gas. In this experimental process, a gas volume meter device is required. The liquid addition process of the gas volume meter device is complex and time-consuming. Generally, the gas volume liquid is added to the side tube through a water injection port funnel. When adding the liquid, bubbles are easily generated in the gas volume meter device, and it is difficult to exhaust the bubbles in the later stage and a large amount of time is required. When adjusting the zero point, the liquid is discharged and adjusted through a three-way valve between the connecting pipe and the gas volume pipe. The experimental process is time-consuming and laborious, the production efficiency is low, and the operation cost of the laboratory is increased. Content of the Utility Model

[0004] In order to solve the above problems, the purpose of the utility model is to provide a device for determining soil carbonate to improve the test accuracy and efficiency.

[0005] Based on the above problems, the technical solution provided by the utility model is as follows:

[0006] A device for determining soil carbonate includes a gas volume pipe and a connecting pipe connected to the gas volume pipe to form a U shape. A three-way valve is arranged between the connecting pipe and the gas volume pipe. The gas volume pipe is connected with a reaction assembly, and further includes:

[0007] A liquid addition assembly is connected to the connecting pipe and used for adding gas volume liquid into the connecting pipe. It includes a first liquid storage container, a liquid addition pipe connecting the first liquid storage container and the connecting pipe, a pressurizing component for pressing the gas volume liquid in the first liquid storage container into the connecting pipe, and a first switch valve arranged on the liquid addition pipe. The liquid addition pipe extends into the first liquid storage container and is in sealed cooperation with the inner wall of the first liquid storage container.

[0008] In some embodiments, the first liquid storage container includes a hollow container body and a supporting part arranged at the upper end of the container body. A through hole for the liquid addition pipe to extend into is arranged on the supporting part. A sealing assembly for sealing cooperation with the supporting part is arranged on the outer wall of the liquid addition pipe. The pressurizing component is connected to the container body.

[0009] In some of these embodiments, the sealing assembly includes a support frame fixed to the outer periphery of the liquid filling pipe and a reinforcing rib disposed between the liquid filling pipe and the support frame, and the support frame is in sealing cooperation with the support portion.

[0010] In some of these embodiments, a first connector and a second connector are further provided at the upper end of the container body. The first connector is connected to the pressurizing component, and a second switching valve is provided on the second connector.

[0011] In some of these embodiments, the liquid filling pipe includes a first vertical pipe vertically arranged and extending into the first liquid storage container, a second vertical pipe vertically arranged and extending to the bottom of the connecting pipe, and a transition pipe connecting the first vertical pipe and the second vertical pipe. The first switching valve is provided on the transition pipe.

[0012] In some of these embodiments, an overflow assembly is connected to the upper part of the connecting pipe. The overflow assembly includes a second liquid storage container and an overflow pipe connecting the second liquid storage container and the connecting pipe.

[0013] In some of these embodiments, the second liquid storage container has the same structure as the first liquid storage container.

[0014] In some of these embodiments, a bracket is further included, and the connecting pipe and the gas volume pipe are fixed on the bracket.

[0015] In some of these embodiments, the bracket includes a base and two vertical rods fixed on the base, and the connecting pipe and the gas volume pipe are respectively fixed on the two vertical rods.

[0016] In some of these embodiments, the connecting pipe is connected to an interface of the three-way valve through a first connecting pipe, and the gas volume pipe is connected to another interface of the three-way valve through a second connecting pipe.

[0017] In some of these embodiments, the reaction assembly includes a reactor and an exhaust pipe connecting the reactor and the gas volume pipe.

[0018] Compared with the prior art, the advantages of the present utility model are as follows:

[0019] The gas volume liquid in the first liquid storage container is pressed into the connecting pipe and the gas volume pipe by the pressurizing component. During the liquid filling process, bubbles are not easily generated, reducing the subsequent operation of eliminating bubbles. When the gas volume liquid exceeds the zero point position on the gas volume pipe, the pressurization can be stopped, and the gas volume liquid exceeding the zero point can flow back to the first liquid storage container by itself without discharging liquid through the three-way valve, simplifying the experimental process, reducing the experimental difficulty, and improving the experimental accuracy and efficiency. Description of the Drawings

[0020] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. The drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic structural diagram of an embodiment of the device for measuring soil carbonate of the present utility model;

[0022] Figure 2 Schematic structural diagram of the sealing assembly in the embodiment of the present utility model;

[0023] Wherein:

[0024] 1. Connecting pipe; 1-1. Overflow joint;

[0025] 2. Gas measuring pipe; 2-1. Exhaust joint;

[0026] 3. Three-way valve;

[0027] 4. Liquid adding pipe; 4-1. First vertical pipe; 4-1a. Support frame; 4-1b. Reinforcing rib; 4-2. Transition pipe; 4-3. Second vertical pipe;

[0028] 5. First liquid storage container; 5-1. Container body; 5-2. Support part; 5-3. First joint; 5-4. Second joint; 5-5. Sealing ring;

[0029] 6. First switching valve;

[0030] 7. Pressurizing component;

[0031] 8. Second switching valve;

[0032] 9. Second liquid storage container;

[0033] 10. Overflow pipe;

[0034] 11. Bracket; 11-1. Base; 11-2. Vertical rod;

[0035] 12. Third switching valve;

[0036] 13. Exhaust pipe;

[0037] 14. Reactor;

[0038] 15. Acid container.

[0039] 16. First connecting pipe;

[0040] 17. Second connecting pipe. Detailed implementation manners

[0041] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are for illustrating the present utility model and not for limiting the scope of the present utility model. The implementation conditions adopted in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0042] As Figure 1 shown, an embodiment of the present utility model provides a device for measuring soil carbonate, which includes a gas burette 2 and a communicating pipe 1 connected to the gas burette 2 in a U shape. A three-way valve 3 is provided between the communicating pipe 1 and the gas burette 2, and the gas burette 2 is connected to a reaction assembly to receive carbon dioxide gas generated by the reaction of a soil sample with hydrochloric acid.

[0043] To facilitate the installation of the communicating pipe 1 and the gas burette 2, a bracket 11 is also provided. The communicating pipe 1 and the gas burette 2 are fixed on the bracket 11. Specifically, the bracket 11 includes a base 11-1 and two vertical rods 11-2 fixed on the base 11-1. The communicating pipe 1 and the gas burette 2 are respectively fixed on the two vertical rods 11-2.

[0044] In this example, the communicating pipe 1 is connected to an interface of the three-way valve 3 through a first connecting pipe 16, and the gas burette 2 is connected to another interface of the three-way valve 3 through a second connecting pipe 17. Usually, the communicating pipe 1 and the gas burette 2 are connected through the three-way valve 3. When liquid drainage is required, the third interface of the three-way valve 3 is connected to the communicating pipe 1 or the gas burette 2 to facilitate the drainage of the gas liquid. Preferably, the first connecting pipe 16 and the second connecting pipe 17 can be made of silicone tubes.

[0045] To facilitate the addition of gas liquid into the communicating pipe 1 and the gas burette 2, a liquid adding assembly is further included, which is connected to the communicating pipe 1 and includes a first liquid storage container 5, a liquid adding pipe 4 connecting the first liquid storage container 5 and the communicating pipe 1, a pressurizing component 7 for pressing the gas liquid in the first liquid storage container 5 into the communicating pipe 1, and a first switch valve 6 provided on the liquid adding pipe.

[0046] Among them, the liquid adding pipe 4 extends into the first liquid storage container 5 and is in sealed cooperation with the inner wall of the first liquid storage container 5. The pressurizing component 7 can adopt a pressurizing ball, and the pressurizing ball is connected to the first liquid storage container 5 through a pressurizing pipe. By pressing the pressurizing ball to pressurize the first liquid storage container 5, the gas liquid in the first liquid storage container 5 is pressed into the communicating pipe 1 and the gas burette 2 through the liquid adding pipe 4. When the gas liquid exceeds the zero scale of the gas burette 2, the first switch valve 6 is closed and the pressurization is stopped. At this time, the hydraulic pressure in the gas burette 2 and the communicating pipe 1 is higher than that in the first liquid storage container 5. When the first switch valve 6 is opened and at the same time the first liquid storage container 5 is communicated with the atmosphere, the gas liquid in the gas burette 2 and the communicating pipe 1 can flow back into the first liquid storage container 5, thereby realizing the adjustment of the zero point of the gas burette, which is convenient and fast, and bubbles are not easily generated during the liquid adding process, improving the experimental accuracy and efficiency.

[0047] Specifically, the first liquid storage container 5 includes a hollow container body 5-1 and a support portion 5-2 provided at the upper end of the container body 5-1. A through hole for the liquid addition pipe 4 to extend into is provided on the support portion 5-2. A sealing assembly for sealing cooperation with the support portion 5-2 is provided on the outer wall of the liquid addition pipe 4. The pressurizing member 7 is connected to the container body 5-1. The liquid addition pipe 4 extends into the container body 5-1 through the through hole and the sealing assembly is in sealing cooperation with the support portion 5-2, which can ensure the sealing performance inside the first liquid storage container 5 and facilitate the pressurizing member 7 to press the gas volume liquid inside the first liquid storage container 5 into the liquid addition pipe 4.

[0048] As Figure 2 shown, the sealing assembly includes a support frame 4-1a fixed on the outer periphery of the liquid addition pipe 4 and a reinforcing rib 4-1b provided between the liquid addition pipe 4-1a and the support frame 4-1a. The support frame 4-1a is in sealing cooperation with the support portion 5-2. For example, the mating surface of the support frame 4-1a and the support portion 5-2 is set as a frosted surface, and the sealing performance can be ensured after applying vaseline on the mating surface.

[0049] A first joint 5-3 and a second joint 5-4 are further provided at the upper end of the container body 5-1. Among them, the first joint 5-3 is connected to the pressurizing pipe, and a second switch valve 8 is provided on the second joint 5-4. The second joint 5-4 can be connected to the liquid inlet pipe to facilitate introducing the gas volume liquid into the first liquid storage container 5. When the pressurizing member 7 pressurizes, the second switch valve 8 is closed to ensure the sealing performance inside the first liquid storage container 5. When it is necessary to adjust the zero point of the gas volume pipe 2, the second switch valve 8 and the first switch valve 6 are opened, and the liquid in the gas volume pipe 2 and the connecting pipe 1 flows back to the first liquid storage container 5 until the liquid level of the gas volume pipe 2 is adjusted to the zero point, and then the first switch valve 6 is switched to achieve rapid adjustment of the zero point of the gas volume pipe 2.

[0050] In this example, the liquid addition pipe 4 includes a first vertical pipe 4-1 arranged vertically and extending into the first liquid storage container 5, a second vertical pipe 4-3 arranged vertically and extending to the bottom of the connecting pipe 1, and a transition pipe 4-2 connecting the first vertical pipe 4-1 and the second vertical pipe 4-3. The first switch valve 6 is provided on the transition pipe 4-2.

[0051] To facilitate collecting the excess gas volume liquid pressed in during pressurization, an overflow assembly is connected to the upper part of the connecting pipe 1. The overflow assembly includes a second liquid storage container 9 and an overflow pipe 10 connecting the second liquid storage container 9 and the connecting pipe 1. An overflow joint 1-1 connected to the overflow pipe 10 is provided on the connecting pipe 1. The overflow pipe 10 can be made of a silicone tube. Preferably, the structure of the second liquid storage container 9 is the same as that of the first liquid storage container 5 and can be used as a spare container for pressurizing the gas volume liquid.

[0052] The reaction assembly includes a reactor 14 and an exhaust pipe 13 connecting the reactor 14 and the gas volume tube 2. The exhaust pipe 13 can be made of silica gel tube. A third switch valve 12 is provided at the upper end of the gas volume tube 2. An exhaust joint 2-1 connected to the exhaust pipe 13 is provided at the upper part of the gas volume tube 2. When pressurizing the gas volume liquid into the gas volume tube 2, the third switch valve 12 is opened. After adjusting the liquid level in the gas volume tube 2 to zero, the third switch valve 12 is closed, and the exhaust pipe 13 is connected to the exhaust joint 2-1 for measurement experiments. An acid container 15 for holding hydrochloric acid is placed in the reactor 14.

[0053] The working principle of the present utility model is as follows:

[0054] Gas volume liquid is added into the first liquid storage container 5 through the second joint 5-4. The second switch valve 8 is closed. The liquid adding pipe 4 is extended into the first liquid storage container 5 and cooperates with the sealing ring to keep the inside of the first liquid storage container 5 sealed;

[0055] The third switch valve 12 and the first switch valve 6 are opened. Gas is filled into the first liquid storage container 5 through the pressurizing component 7. The gas volume liquid in the first liquid storage container 5 is pressed into the communicating pipe 1 and the gas volume tube 2 through the liquid adding pipe 4. When the liquid level in the gas volume tube 2 exceeds zero, the first switch valve 6 is closed, and at the same time, the pressurization is stopped. At this time, the gas volume liquid exceeding the height of the overflow joint 1-1 flows into the second liquid storage container 9 through the overflow pipe 10;

[0056] The second switch valve 8 is opened. At this time, the gas volume liquid in the communicating pipe 1 and the gas volume tube 2 flows back to the first liquid storage container 5 through the liquid adding pipe 4 until the liquid level in the gas volume tube 2 is adjusted to zero and the first switch valve 6 is closed;

[0057] The third switch valve 12 is closed. The exhaust pipe 13 is connected to the exhaust joint 2-1. The reactor 14 is tilted to make the hydrochloric acid in the acid container 15 react with the soil. The generated carbon dioxide enters the gas volume tube 2 through the reaction tube, and the liquid level of the gas volume tube 2 drops. The value of the liquid level drop in the gas volume tube 2 is read, and the mass percentage of calcium carbonate in the soil is calculated according to the following formula:

[0058]

[0059] Where: m r is the mass of the calcium carbonate standard sample weighed, g; m s is the mass of the soil sample weighed, g; V r is the gas volume reading of the calcium carbonate standard sample, mL; V s is the gas volume reading of the soil sample, mL.

[0060] In summary, when adding liquid, the device is not likely to generate bubbles, reducing the subsequent operation of eliminating bubbles, and the operation of adjusting the zero point is fast, improving the experimental accuracy and efficiency.

[0061] The above examples are only for illustrating the technical concept and features of the present utility model, and the purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it accordingly, and it cannot be used to limit the protection scope of the present utility model. Any equivalent transformation or modification made according to the spirit and essence of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A device for measuring soil carbonate, comprising a gas volume tube and a connecting pipe connected to the gas volume tube in a U shape, a three-way valve is arranged between the connecting pipe and the gas volume tube, the gas volume tube is connected to a reaction component, characterized in that: Also includes: A liquid adding assembly is connected to the connecting pipe and is used to add gas liquid into the connecting pipe, comprising a first liquid storage container, a liquid adding pipe connecting the first liquid storage container and the connecting pipe, a pressurizing component for pressing the gas liquid in the first liquid storage container into the connecting pipe, and a first switch valve arranged on the liquid adding pipe, wherein the liquid adding pipe extends into the first liquid storage container and is sealed with the inner wall of the first liquid storage container.

2. The soil carbonate measuring device according to claim 1, characterized in that: The first liquid storage container includes a hollow container body and a support portion arranged at the upper end of the container body, the support portion is provided with a through hole for the liquid adding tube to extend therethrough, the outer wall of the liquid adding tube is provided with a sealing component that seals with the support portion, and the pressurizing component is connected to the container body.

3. The soil carbonate measuring device according to claim 2, characterized in that: The sealing assembly includes a support frame fixed to the outer periphery of the liquid adding pipe and a reinforcing rib arranged between the liquid adding pipe and the support frame, and the support frame is in sealing cooperation with the supporting part.

4. The soil carbonate measuring device according to claim 2, characterized in that: The upper end of the container body is also provided with a first joint and a second joint, the first joint is connected to the pressurizing component, and the second joint is provided with a second switch valve.

5. The soil carbonate measuring device according to claim 4, characterized in that: The liquid adding pipe includes a first vertical pipe arranged vertically and extending into the first liquid storage container, a second vertical pipe arranged vertically and extending to the bottom of the connecting pipe, and a transition pipe connecting the first vertical pipe and the second vertical pipe, and the first switch valve is arranged on the transition pipe.

6. The soil carbonate measuring device according to claim 2, characterized in that: An overflow assembly is connected to the upper portion of the connecting pipe. The overflow assembly includes a second liquid storage container and an overflow pipe connecting the second liquid storage container and the connecting pipe. The second liquid storage container has the same structure as the first liquid storage container.

7. The soil carbonate measuring device according to claim 1, characterized in that: It also includes a bracket, and the connecting pipe and the gas volume pipe are fixed on the bracket.

8. The soil carbonate measuring device according to claim 7, characterized in that: The bracket comprises a base and two vertical rods fixed on the base, and the connecting pipe and the gas volume pipe are respectively fixed on the two vertical rods.

9. The soil carbonate measuring device according to claim 1, characterized in that: The communicating pipe is connected to one interface of the three-way valve via a first connecting pipe, and the gas volume pipe is connected to the other interface of the three-way valve via a second connecting pipe.

10. The soil carbonate measuring device according to claim 1, characterized in that: The reaction assembly includes a reactor and an exhaust pipe connecting the reactor and the gas pipe.

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