Device for testing biological toxicity of volatile organic contaminated soil

Abstract

The utility model belongs to the technical field of soil biological comprehensive toxicity detection with soil habitat functions, and discloses a volatile organic contaminated soil biological toxicity testing device which comprises a soil sample bottle filled with soil and a gas washing and testing device bottle filled with a gas washing solution. The gas washing and testing device further comprises a buffering mechanism which is arranged on the first gas guide pipe, located on the inner side wall of the gas washing and testing device bottle and used for buffering impact force of backflow gas, the buffering mechanism comprises a mounting box fixedly connected to the side wall of the first gas guide pipe, and a buffering ring is connected with a buffering plate through a plurality of extrusion assemblies. According to the volatile organic contaminated soil biotoxicity testing device, through the arrangement of the buffer mechanism, backflow gas is buffered, the impact force on a gas washing solution is reduced, and therefore the generation probability of bubbles is reduced, and the testing efficiency is improved. The reduction of the content of volatile organic compounds in the soil and the influence on the physiological state and behavior of a tested organism caused by excessive bubbles are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of comprehensive toxicity detection of soil organisms for soil habitat functions, and particularly relates to a device for testing the biological toxicity of volatile organic polluted soil. Background Art

[0002] Using sensitive organisms to directly reflect the comprehensive toxicity effect of polluted sites can characterize the comprehensive toxicity impact of soil samples on biological individuals and populations, and has the characteristics of simplicity and economy, and can screen polluted soils in multiple batches, of multiple types, and at different concentrations.

[0003] In the Chinese utility model patent with the publication number of CN 216411292 U3, a device for testing the biological toxicity of volatile organic polluted soil is disclosed. The soil to be tested is filled on the sieve plate of the soil sample bottle; deionized water is filled in the gas washing and test device bottle as the gas washing solution, and the liquid level is lower than the glass partition in the bottle body; all bottle stoppers are tightened, the peristaltic pump is started to pump the gas above the gas washing and test device bottle into the bottom of the soil sample bottle, and then the gas above the soil sample bottle enters the gas washing solution in the gas washing and test device bottle from the top. When the sponge above the glass partition is wetted, the peristaltic pump is paused, the upper cover of the gas washing and test device bottle is opened, white springtails are added on the sponge, the upper cover is covered, the peristaltic pump is started, and the number of white springtails jumping out of the sponge and the number of springtails remaining on the sponge are timed and recorded.

[0004] Regarding the above related technologies, the inventor believes that there are the following defects: when starting the peristaltic pump to pump the gas above the gas washing and test device bottle into the bottom of the soil sample bottle, and then returning the gas above the soil sample bottle to the gas washing solution in the gas washing and test device bottle, due to the relatively large pressure of the reflux gas, a large impact force is caused on the gas washing solution, resulting in the generation of more bubbles in the gas washing solution. The generation of bubbles will wrap the volatile organic compounds in the soil, resulting in a smaller content of volatile organic compounds in the soil sample, thereby affecting the accuracy of toxicity assessment. Moreover, the generation and rupture of bubbles will change the dissolved oxygen content, pH value or other chemical parameters in the gas washing solution, and these changes will affect the physiological state and behavior of the test organisms, thus affecting the test results. Content of the Utility Model

[0005] In order to solve the above problems, the utility model provides a device for testing the biological toxicity of volatile organic polluted soil.

[0006] The above technical object of the utility model is achieved by the following technical solutions: A device for testing the biological toxicity of volatile organic contaminated soil, including a soil sample bottle filled with soil and a scrubbing and testing device bottle filled with a scrubbing solution. A first air duct and a second air duct are connected between the soil sample bottle and the scrubbing and testing device bottle. A peristaltic pump is provided on the second air duct. A bottle body glass partition is provided in the scrubbing and testing device bottle. It also includes a buffer mechanism provided on the inner side wall of the first air duct located inside the scrubbing and testing device bottle for buffering the impact force of the reflux gas.

[0007] The buffer mechanism includes an installation box fixedly connected to the side wall of the first air duct. A rotating shaft is rotatably connected inside the installation box. One end of the rotating shaft penetrates through the installation box and is fixedly connected with a circular plate. A buffer block is connected to the side wall of the circular plate through a plurality of telescopic components. A buffer ring is fixedly connected to the side of the installation box close to the circular plate. The buffer ring is connected with a buffer plate through a plurality of extrusion components. A driving mechanism for driving the circular plate is provided on the rotating shaft.

[0008] By adopting the above technical solution, the reflux gas is buffered, the impact force on the scrubbing solution is reduced, and thus the generation probability of bubbles is reduced.

[0009] Further, the rotating shaft is eccentrically arranged with the first air duct.

[0010] By adopting the above technical solution, it is convenient for the reflux gas to impact on the surface of the driving plate.

[0011] Further, the buffer ring is concentrically arranged with the rotating shaft, and the end far from the installation box is sealed.

[0012] By adopting the above technical solution, the entry of the scrubbing solution is avoided.

[0013] Further, inclined surfaces are provided on the two opposite side walls of each buffer block, and each inclined surface slides on the side wall of the buffer plate.

[0014] By adopting the above technical solution, the buffer plate will be pushed to move away from the circular plate.

[0015] Further, the telescopic component includes a telescopic tube fixedly connected to the circular plate. A telescopic rod is slidably connected to the telescopic tube. One end of the telescopic rod is connected with the buffer block, and the other end of the telescopic rod is fixedly connected with a telescopic plate. A first spring is sleeved on the side wall of the telescopic rod, and the two ends of the first spring are respectively connected with the side walls of the telescopic plate and the telescopic tube.

[0016] By adopting the above technical solution, it provides a guiding and resetting effect for the movement of the buffer block.

[0017] Further, the extrusion assembly includes an extrusion tube fixedly connected to the inner wall of the buffer ring. An extrusion rod is slidably connected to the extrusion tube. One end of the extrusion rod is connected to the buffer plate. A second spring is sleeved on the side wall of the extrusion tube, and the two ends of the second spring are respectively connected to the buffer ring and the buffer plate.

[0018] By adopting the above technical solution, it provides guidance and reset functions for the movement of the buffer plate.

[0019] Further, the driving mechanism is a driving plate, and the driving plate is fixedly connected to the side wall of the rotating shaft.

[0020] By adopting the above technical solution, it drives the driving plate to rotate, and further drives the rotating shaft to rotate.

[0021] Further, a plurality of driving plates are provided, and each driving plate is arranged in an annular array.

[0022] By adopting the above technical solution, it is convenient to drive the continuous rotation of the rotating shaft.

[0023] In summary, the present utility model has the following beneficial effects:

[0024] In the volatile organic polluted soil biotoxicity test device of the present application, through the setting of the buffer mechanism, the reflux gas is buffered, the impact force on the scrubbing solution is reduced, thereby reducing the generation probability of bubbles, avoiding the reduction of the content of volatile organic compounds in the soil and the influence on the physiological state and behavior of the test organisms caused by excessive bubbles, and thus improving the accuracy of the biotoxicity test of volatile organic polluted soil. Description of the Drawings

[0025] Figure 1 is the overall structural schematic diagram of the embodiment of the present utility model;

[0026] Figure 2 is the internal structural schematic diagram of the scrubbing and test device bottle of the embodiment of the present utility model;

[0027] Figure 3 is the structural schematic diagram of the buffer mechanism of the embodiment of the present utility model;

[0028] Figure 4 is Figure 3 the enlarged schematic diagram at A in

[0029] Figure 5 is the internal structural schematic diagram of the driving mechanism of the embodiment of the present utility model.

[0030] In the figure: 101, soil sample bottle; 102, gas washing and test device bottle; 103, first air duct; 104, second air duct; 105, peristaltic pump; 106, glass partition of the bottle body; 201, installation box; 202, rotating shaft; 203, circular plate; 204, buffer block; 205, buffer ring; 206, buffer plate; 207, inclined plane; 301, telescopic tube; 302, telescopic rod; 303, telescopic plate; 304, first spring; 401, extrusion tube; 402, extrusion rod; 403, second spring; 5, driving plate. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] Embodiment 1

[0033] Please refer to Figures 1-5 , a volatile organic contaminated soil biotoxicity test device in the figure, including a soil sample bottle 101 filled with soil and a gas washing and test device bottle 102 filled with a gas washing solution. A first air duct 103 and a second air duct 104 are connected between the soil sample bottle 101 and the gas washing and test device bottle 102. A peristaltic pump 105 is provided on the second air duct 104. A glass partition 106 of the bottle body is provided in the gas washing and test device bottle 102. It also includes a buffer mechanism provided on the inner side wall of the first air duct 103 in the gas washing and test device bottle 102 for buffering the impact force of the reflux gas;

[0034] The buffer mechanism includes an installation box 201 fixedly connected to the side wall of the first air duct 103. A rotating shaft 202 is rotatably connected in the installation box 201. One end of the rotating shaft 202 penetrates through the installation box 201 and is fixedly connected with a circular plate 203. A buffer block 204 is connected to the side wall of the circular plate 203 through a plurality of telescopic components. A buffer ring 205 is fixedly connected to the side of the installation box 201 close to the circular plate 203. A buffer plate 206 is connected to the buffer ring 205 through a plurality of extrusion components. A driving mechanism for driving the circular plate 203 is provided on the rotating shaft 202;

[0035] It should be noted here that: through the setting of the buffer mechanism, the reflux gas is buffered, the impact force on the gas washing solution is reduced, thereby reducing the generation probability of bubbles, avoiding the reduction of the content of volatile organic compounds in the soil and the influence on the physiological state and behavior of the test organisms caused by excessive bubbles, and thus improving the accuracy of the biotoxicity test of volatile organic contaminated soil.

[0036] It should be noted that for the specific steps and working principles of the biotoxicity test of volatile organic contaminated soil, please refer to a volatile organic contaminated soil biotoxicity test device disclosed in the Chinese utility model patent with the publication number CN 216411292 U3, and no further elaboration will be made here.

[0037] Please refer to Figure 3 and Figure 4 , in the figure, the rotating shaft 202 is eccentrically arranged with the first air duct 103;

[0038] It should be noted here that by eccentrically arranging the rotating shaft 202, it is convenient for the reflux gas to impact the surface of the driving plate 5.

[0039] Please refer to Figure 2 , in the figure, the buffer ring 205 is concentrically arranged with the rotating shaft 202, and the end far from the mounting box 201 is sealed;

[0040] It should be noted here that by sealing the buffer ring 205, the entry of the scrubbing solution is avoided.

[0041] Please refer to Figure 3 and Figure 4 , in the figure, inclined surfaces 207 are formed on two opposite side walls of each buffer block 204, and each inclined surface 207 slides on the side wall of the buffer plate 206;

[0042] It should be noted here that through the setting of the inclined surfaces 207, when the buffer block 204 abuts against the buffer plate 206, under the mutual acting force of the inclined surfaces 207 and the guiding action of the pressing assembly, the buffer plate 206 will be pushed to move away from the circular plate 203.

[0043] Please refer to Figure 3 and Figure 4 , in the figure, the telescopic assembly includes a telescopic tube 301 fixedly connected to the circular plate 203, a telescopic rod 302 is slidably connected to the telescopic tube 301, one end of the telescopic rod 302 is connected to the buffer block 204, the other end of the telescopic rod 302 is fixedly connected to a telescopic plate 303, and a first spring 304 is sleeved on the side wall of the telescopic rod 302, and both ends of the first spring 304 are respectively connected to the side wall of the telescopic plate 303 and the telescopic tube 301;

[0044] It should be noted here that through the setting of the telescopic assembly, a guiding and resetting function is provided for the movement of the buffer block 204.

[0045] Please refer to Figure 3 and Figure 4, in the illustrated extrusion assembly, an extrusion tube 401 is fixedly connected to the inner wall of the buffer ring 205. A sliding rod 402 is slidably connected to the extrusion tube 401. One end of the sliding rod 402 is connected to the buffer plate 206. A second spring 403 is sleeved on the side wall of the extrusion tube 401. Both ends of the second spring 403 are respectively connected to the buffer ring 205 and the buffer plate 206;

[0046] It should be noted here that: through the setting of the extrusion assembly, it provides guiding and resetting functions for the movement of the buffer plate 206.

[0047] Working principle: When testing the biotoxicity of volatile organic contaminated soil, the soil to be tested is filled on the sieve plate of the soil sample bottle 101. Deionized water is filled in the gas washing and test device bottle 102 as the gas washing solution. The liquid level is lower than the glass partition 106 of the bottle body. The bottle stopper is tightly closed. The peristaltic pump 105 is started to pump the gas above the gas washing and test device bottle 102 into the bottom of the soil sample bottle 101, and then enters the gas washing solution in the gas washing and test device bottle 102 from the top. Wait until the sponge on the glass partition 106 of the bottle body is wetted. Pause the peristaltic pump 105. Open the upper cover of the gas washing and test device bottle 102. Add springtails larvae on the sponge. Cover the upper cover. Start the peristaltic pump 105. Time and record the number of springtails that jump out of the sponge and the number of springtails remaining on the sponge;

[0048] During the process of the reflux gas entering the gas washing and test device bottle 102 from the first air duct 103, under the action of the driving mechanism, the circular plate 203 on the rotating shaft 202 is driven to rotate. During the rotation of the circular plate 203, through centrifugal force, each buffer block 204 is driven to move away from each other. During the process of each buffer block 204 moving away from each other, when the buffer block 204 abuts against the buffer plate 206, under the mutual acting force of the inclined surface 207 and the guiding action of the extrusion assembly, the buffer plate 206 is pushed to move away from the circular plate 203. During the process of the buffer plate 206 moving away from the circular plate 203, the second spring 403 will be compressed. The compressed and deformed second spring 403 will exert a reverse driving force on the buffer plate 206, so as to exert a rotational resistance on the movement of the buffer block 204, further slowing down the rotation of the rotating shaft 202, thereby buffering the reflux gas passing through the installation box 201, reducing the impact force on the gas washing solution, thereby reducing the probability of generating bubbles, and avoiding the reduction of the content of volatile organic compounds in the soil and the influence on the physiological state and behavior of the test organisms caused by excessive bubbles, thereby improving the accuracy of the biotoxicity test of volatile organic contaminated soil.

[0049] Embodiment 2

[0050] Please refer to Figure 5, this embodiment further elaborates on Example 1. In the illustration, the driving mechanism is the driving plate 5, and the driving plate 5 is fixedly connected to the side wall of the rotating shaft 202;

[0051] It should be noted here that: through the setting of the driving plate 5, during the process of the reflux gas entering the scrubbing and testing device bottle 102 from the first gas guide pipe 103, since the rotating shaft 202 and the first gas guide pipe 103 are eccentrically arranged, therefore, the reflux gas will impact on the side wall of the driving plate 5, and thus, under the impact force, drive the driving plate 5 to rotate, and further drive the rotating shaft 202 to rotate.

[0052] Furthermore, a plurality of driving plates 5 are provided, and each driving plate 5 is arranged in a circular array;

[0053] It should be noted here that: through the plurality of driving plates 5 arranged in a circular array, it is convenient to drive the continuous rotation of the rotating shaft 202.

[0054] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A volatile organic polluted soil biological toxicity testing device, comprising: A soil sample bottle (101) filled with soil and a scrubbing and testing device bottle (102) filled with a scrubbing solution, wherein a first air guide tube (103) and a second air guide tube (104) are connected between the soil sample bottle (101) and the scrubbing and testing device bottle (102), a peristaltic pump (105) is provided on the second air guide tube (104), and a bottle body glass partition (106) is provided inside the scrubbing and testing device bottle (102); Its characteristics include: A buffer mechanism is arranged on the first air guide pipe (103) on the inner side wall of the gas washing and testing device bottle (102) and is used to buffer the impact force of the reflux gas; The buffer mechanism comprises an installation box (201) fixedly connected to the side wall of the first air guide tube (103); a rotating shaft (202) is rotatably connected inside the installation box (201); one end of the rotating shaft (202) passes through the installation box (201) and is fixedly connected to a circular plate (203); a buffer block (204) is connected to the side wall of the circular plate (203) via a plurality of telescopic components; a buffer ring (205) is fixedly connected to a side of the installation box (201) close to the circular plate (203); the buffer ring (205) is connected to a buffer plate (206) via a plurality of extrusion components; and a driving mechanism for driving the circular plate (203) is provided on the rotating shaft (202).

2. The volatile organic polluted soil biological toxicity testing device according to claim 1 is characterized by: The rotating shaft (202) and the first air guide tube (103) are eccentrically arranged.

3. The volatile organic polluted soil biological toxicity testing device according to claim 1 is characterized by: The buffer ring (205) is arranged concentrically with the rotating shaft (202) and is sealed at one end away from the installation box (201).

4. The volatile organic polluted soil biological toxicity testing device according to claim 1 is characterized by: Two opposite side walls of each buffer block (204) are provided with inclined surfaces (207), and each inclined surface (207) slides on the side wall of the buffer plate (206).

5. The volatile organic polluted soil biological toxicity testing device according to claim 1 is characterized by: The telescopic assembly comprises a telescopic tube (301) fixedly connected to a circular plate (203); a telescopic rod (302) is slidably connected to the telescopic tube (301); one end of the telescopic rod (302) is connected to a buffer block (204); the other end of the telescopic rod (302) is fixedly connected to a telescopic plate (303); a first spring (304) is sleeved on a side wall of the telescopic rod (302); two ends of the first spring (304) are respectively connected to the telescopic plate (303) and the side wall of the telescopic tube (301).

6. The volatile organic polluted soil biological toxicity testing device according to claim 1 is characterized by: The extrusion assembly comprises an extrusion tube (401) fixedly connected to the inner wall of a buffer ring (205); an extrusion rod (402) is slidably connected to the extrusion tube (401); one end of the extrusion rod (402) is connected to a buffer plate (206); a second spring (403) is sleeved on the side wall of the extrusion tube (401); two ends of the second spring (403) are respectively connected to the buffer ring (205) and the buffer plate (206).

7. The volatile organic polluted soil biological toxicity testing device according to claim 1 is characterized by: The driving mechanism is a driving plate (5), and the driving plate (5) is fixedly connected to the side wall of the rotating shaft (202).

8. The volatile organic polluted soil biological toxicity testing device according to claim 7 is characterized by: A plurality of the drive plates (5) are provided, and the drive plates (5) are arranged in a ring array.

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