Full-automatic pretreatment extraction device for determining hexavalent chromium in soil

Abstract

The utility model relates to the technical field of soil determination extraction equipment, and discloses a full-automatic pretreatment extraction device for determining hexavalent chromium in soil, which comprises a box body, the top of the box body is fixedly connected with a first liquid box, the first liquid box is connected with a three-way joint I through a pipeline, and a liquid outlet of the three-way joint I is communicated with a telescopic hose I; one end of the telescopic hose I is communicated with a three-way joint I, the other end of the telescopic hose I is communicated with a flow guide pipe I, a first mechanical arm used for pushing the flow guide pipe I to move horizontally is arranged on the outer surface of the flow guide pipe I, and an extraction tank fixedly arranged in the box body is arranged below the other outlet of the flow guide pipe I. Meanwhile, the other water pump is started to convey the buffer solution into the first three-way connector, an electric flow control valve on the first three-way connector controls the flow of the extracting solution and the amount of the buffer solution to enter the first telescopic hose through the first three-way connector, and therefore the flow of the extracting solution is adjusted according to requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to soil determination extraction equipment technical field, more specifically, relate to a kind of full-automatic pretreatment extraction device for determining hexavalent chromium in soil. BACKGROUND

[0002] According to the requirement of HJ1082-2019 "Determination of Hexavalent Chromium in Soil and Sediment by Alkaline Solution Extraction-Flame Atomic Absorption Spectrophotometry", the hexavalent chromium in soil samples is extracted by heating and stirring with alkaline solution. The filtered filtrate is collected for testing after the extracted sample is filtered. The traditional suction filtration device is a Buchner funnel and a suction filtration bottle. The following problems exist in the prior art:

[0003] Firstly, the working efficiency is low, and only one sample can be processed at a time, resulting in a long time for soil sample suction filtration.

[0004] Secondly, the extraction solution and buffer solution are manually added, which is slow and not conducive to batch soil pretreatment.

[0005] Thirdly, after the filtrate is filtered into the suction filtration bottle, the filtrate in the suction filtration bottle needs to be transferred to the filtrate collection bottle, which may cause loss of the filtrate during the transfer process.

[0006] Fourthly, the filtered filtrate needs to be manually constant volume, which is time-consuming. UTILITY MODEL CONTENT

[0007] To solve the problems raised in the above background art, the utility model provides a full-automatic pretreatment extraction device for determining hexavalent chromium in soil.

[0008] The full-automatic pretreatment extraction device for determining hexavalent chromium in soil provided by the utility model adopts the following technical solution: a full-automatic pretreatment extraction device for determining hexavalent chromium in soil, comprising a box body, a first liquid tank is fixedly connected to the top of the box body, a three-way joint one is connected to the first liquid tank through a pipeline, a flexible hose one is communicated to the liquid outlet of the three-way joint one, another end of the flexible hose one is communicated to a flow guide pipe one, a first mechanical arm for pushing the flow guide pipe one to move horizontally is installed on the outer surface of the flow guide pipe one, an extraction tank is arranged below another outlet of the flow guide pipe one, a liquid discharge pipe is communicated to the bottom of the extraction tank, a Buchner funnel is arranged below another end of the liquid discharge pipe, a collection bottle is arranged above the Buchner funnel, a flow guide pipe two is arranged above the collection bottle, the flow guide pipe two is installed on a second mechanical arm for pushing the flow guide pipe one to move horizontally, a flexible hose two is communicated to another end of the flow guide pipe two, a filter tank is fixedly connected to the surface of another end of the flexible hose two, a three-way joint two is communicated to the flexible hose two, a second liquid tank is connected to the three-way joint two through a pipeline, and an air extraction mechanism is installed in the filter tank.

[0009] Preferably, the first mechanical arm comprises a first threaded block, a first screw rod and a first motor, the output end of the first motor is in transmission connection with one end of the first screw rod penetrating through the box body, the first screw rod is rotationally connected in the interior of the box body, the first screw rod is in screw transmission connection with the first threaded block, and the interior of the first threaded block is fixedly installed with an upper flow guide pipe.

[0010] Preferably, the interior is fixedly connected with a heating assembly, the heating assembly comprises a heater, an electric fan and a temperature control panel, the temperature control panel is electrically connected with the heater and the electric fan respectively, so that the temperature control panel controls the speed of the electric fan and the heating temperature of the electric heater.

[0011] Preferably, the interior of the Buchner funnel is installed with filter paper.

[0012] Preferably, the second mechanical arm comprises a second threaded block, a second screw rod and a motor box, the motor box is fixedly installed on the box body, one side of the motor box is fixedly connected with the filter box, the interior of the motor box is fixedly connected with a second motor, the output shaft of the second motor is in transmission connection with one end of the second screw rod penetrating through the filter box, the other end of the second screw rod is rotationally connected with the filter box, the surface of the second screw rod is in screw transmission connection with the second threaded block, and the second flow guide pipe is fixedly installed in the interior of the second threaded block.

[0013] Preferably, the air suction mechanism comprises a suction pipe and an air pump, one end of the suction pipe is in communication with the air pump, and the other end of the suction pipe is in communication with the interior cavity of the filter box through the box body and the filter box in sequence.

[0014] Preferably, the second liquid tank comprises a nitric acid tank and a water tank, the nitric acid tank and the water tank are in communication with the second liquid tank through pipelines respectively, and each pipeline is provided with an electric valve, the first liquid tank comprises an extraction liquid tank and a buffer liquid tank, the extraction liquid tank and the buffer liquid tank are in communication with a three-way joint one through pipelines respectively, and the three-way joint one is fixedly installed with an electric flow regulating valve for controlling the flow of the extraction liquid and the buffer liquid.

[0015] In summary, the utility model has the following beneficial technical effects:

[0016] 1. The utility model discloses a water pump is started to the extraction liquid is delivered to three -way joint no.

[0017] 2. The utility model discloses a first mechanical arm is started drive guide pipe one moves to the extraction tank above, and extraction liquid is arranged to the extraction tank through three -way joint no. 1, flexible hose no. 1, guide pipe no. 1, and extraction liquid is arranged to the Buchner funnel in the drainage pipe that extraction tank lower intercommunication, then filter paper in the Buchner funnel is filtered to extraction liquid, then filter liquid is arranged to the inside of collection bottle, and the air in the filter box is extracted through starting the air -extraction mechanism, and the filtration of filter paper to extraction liquid is accelerated.

[0018] 3. The utility model discloses a second mechanical arm drive guide pipe two slide to corresponding collection bottle, then according to the size of pH value, through nitric acid, water, water pump, electric valve cooperation uses, nitric acid or water is arranged to the collection bottle through three -way joint no. 2, flexible hose no. 2, guide pipe no. 2, thereby reach the pH value of the liquid in the collection bottle is adjusted, thereby realized the automatic completion to extraction liquid filtrate, reduced the handling of filtrate, the loss caused. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the front perspective structure schematic diagram in the utility model embodiment;

[0020] Figure 2 It is the internal structure schematic diagram in the utility model embodiment;

[0021] Figure 3 It is the extraction tank structure schematic diagram in the utility model embodiment;

[0022] Figure 4 It is the filter box internal structure schematic diagram in the utility model embodiment;

[0023] Figure 5 It is the filter box bottom structure schematic diagram in the utility model embodiment.

[0024] BRIEF DESCRIPTION OF DRAWINGS: 1, the box body;2, first liquid tank;3, three -way joint no. 1;4, flexible hose no. 1;5, guide pipe no. 1;6, first threaded block;7, first screw;8, first motor;9, extraction tank;91, first vibrating plate;92, first spring;93, first vibrator;10, drainage pipe;11, heating assembly;12, Buchner funnel;13, filter paper;14, collection bottle;141, second vibrating plate;142, second spring;143, second vibrator;15, guide pipe no. 2;16, second threaded block;17, second screw;18, motor box;19, flexible hose no. 2;20, three -way joint no. 2;21, second liquid tank;22, filter box;23, air suction pipe;24, gas pump. DETAILED DESCRIPTION

[0025] The following combines the drawings Figures 1-5 The utility model is further explained in detail.

[0026] Note that the drawings are schematic and not drawn to scale. The relative dimensions and proportions of the illustrated parts in the drawings are exaggerated or reduced, as the case may be, for the sake of clarity and convenience in the drawings, and are not limiting in scope. The same reference signs are used in more than one drawing to represent the same structural or functional elements of the same features.

[0027] The utility model discloses an automatic pretreatment extraction device for determining hexavalent chromium in soil. Figures 1-5 An automatic pretreatment extraction device for determining hexavalent chromium in soil, comprising a box body 1, a first liquid tank 2 is fixedly connected to the top of the box body 1, the first liquid tank 2 is connected with a three-way joint one 3 through a pipeline, the first liquid tank 2 comprises an extraction liquid tank and a buffer solution tank, the extraction liquid tank and the buffer solution tank are communicated with the three-way joint one 3 through pipelines respectively, a water pump is arranged on the pipeline of the extraction liquid tank and the pipeline of the buffer tank for conveying extraction liquid and buffer solution, an electric flow regulating valve is fixedly installed on the three-way joint one 3 for controlling the flow of the extraction liquid and the buffer solution.

[0028] In the present application, the liquid outlet of the three-way joint one 3 is communicated with a flexible hose one 4, the other end of the flexible hose one 4 is communicated with a flow guide pipe one 5, a first mechanical arm for pushing the flow guide pipe one 5 to move horizontally is installed on the outer surface of the flow guide pipe one 5, the first mechanical arm comprises a first threaded block 6, a first screw rod 7 and a first motor 8, the output end of the first motor 8 is drivingly connected with one end of the first screw rod 7 penetrating through the box body 1, the first screw rod 7 is rotatably connected inside the box body 1, the first screw rod 7 is screwingly drivingly connected with the first threaded block 6, and the first threaded block 6 has the flow guide pipe one 5 fixedly installed inside; the first mechanical arm, the flexible hose one 4, the three-way joint one 3 and the first liquid tank 2 are arranged to add the extraction liquid into the extraction tank 9.

[0029] In the present application, the extraction tank 9 is arranged below the other outlet of the flow guide pipe one 5, a first vibration plate 91 is fixedly connected to the outer surface of the extraction tank 9, a plurality of first springs 92 are fixedly connected to the bottom of the two sides of the first vibration plate 91, the bottom of the first spring 92 is fixedly connected to a mounting plate on the inner wall of the box body 1, and the two sides of the first vibration plate 91 are fixedly connected with a first vibrator 93;

[0030] The first vibrator 93 is started to drive the first vibration plate 91 to vibrate, the extraction tank 9 is driven by the first vibration plate 91 to vibrate, and the up and down action caused by the vibration of the first vibration plate 91 is buffered by the first spring 92, so as to accelerate the extraction liquid on the extraction tank 9 to drop on the burette 12;

[0031] The bottom of the extraction tank 9 is communicated with a liquid discharge pipe 10, the other end of the liquid discharge pipe 10 is provided below a Buchner funnel 12, the inside of the Buchner funnel 12 is provided with a filter paper 13, the filter paper 13 is used for filtering the extraction liquid falling into the Buchner funnel 12 from the liquid discharge pipe 10, the bottom of the Buchner funnel 12 is provided below a filter port with a collection bottle 14;

[0032] The bottom of the collection bottle 14 is mounted on a second vibrating plate 141, the two side bottoms of the second vibrating plate 141 are fixedly connected with a plurality of second springs 142, the other end of the second spring 142 is fixedly mounted on the inner wall of the filter box 22, the bottom center of the second vibrating plate 141 is fixedly connected with a second vibrator 143;

[0033] Specifically, the second vibrator 143 is started to drive the second vibrating plate 141 to vibrate, the vibration of the second vibrating plate 141 is buffered up and down by the second spring 142, the vibration of the second vibrating plate 141 drives the collection bottle 14 to shake, and the neutralization of the pH value in the collection bottle 14 is accelerated;

[0034] The upper side of the collection bottle 14 is provided with a flow guide pipe two 15, the surface of the flow guide pipe two 15 is mounted on a second mechanical arm for pushing the flow guide pipe one 5 to move horizontally;

[0035] The second mechanical arm includes a second threaded block 16, a second screw rod 17, and a motor box 18, the motor box 18 is fixedly mounted on the box body 1, and one side of the motor box 18 is fixedly connected with the filter box 22, the inside of the motor box 18 is fixedly connected with a second motor, the output shaft of the second motor is in transmission connection with the second screw rod 17 penetrating through the filter box 22 and one end of the box body 1, the other end of the second screw rod 17 is rotationally connected with the filter box 22, the surface of the second screw rod 17 is in screw transmission connection with the second threaded block 16, and the flow guide pipe two 15 is fixedly mounted in the inside of the second threaded block 16; By arranging the filter paper 13, the Buchner funnel 12, and the collection bottle 14, the filter paper 13 is used for filtering the extraction liquid falling into the Buchner funnel 12 from the liquid discharge pipe 10, and then the filtered liquid falls into the collection bottle 14, by arranging the second mechanical arm, the flexible hose two 19, the three-way joint two 20, the second liquid tank 21, and the flow guide pipe two 15, the second mechanical arm drives the flow guide pipe two 15 to move to the collection bottle 14, and the nitric acid and water in the second liquid tank 21 are added to the collection bottle 14, so as to facilitate the staff to adjust the pH value of the collection bottle 14.

[0036] The other end of the draft tube two 15 is communicated with the flexible hose two 19, the surface of the other end of the flexible hose two 19 is fixedly connected with the filter box 22, the flexible hose two 19 is communicated with the three-way joint two 20, the three-way joint two 20 is connected with the second liquid tank 21 through the pipeline, the second liquid tank 21 includes a nitric acid tank and a water tank, and the nitric acid tank and the water tank are respectively communicated with the second liquid tank 21 through the pipeline, an electric valve and a water pump are arranged on each pipeline, the pipeline is opened or closed by using the electric valve, then according to the pH value, the corresponding water pump is started to input nitric acid liquid or water into the collecting bottle 14, the pH value is adjusted, the inside of the filter box 22 is provided with an air extraction mechanism, the air extraction mechanism includes a suction pipe 23 and an air pump 24, one end of the suction pipe 23 is communicated with the air pump 24, and the other end of the suction pipe 23 is sequentially communicated with the inside of the filter box 22 through the box body 1 and the filter box 22;

[0037] The inside of the box body 1 is fixedly connected with a heating assembly 11, the heating assembly 11 includes a heater, an electric fan and a temperature control panel, the temperature control panel is electrically connected with the heater and the electric fan respectively, so that the temperature control panel controls the speed of the electric fan and the heating temperature of the electric heater, and the temperature control panel is electrically connected with a temperature sensor, the temperature sensor is installed in the inside of the box body 1 and is used for detecting the temperature in the box body 1;

[0038] The temperature sensor transmits the temperature information of the box body 1 to the temperature control panel by being provided with the temperature control panel, the heater, the electric fan and the temperature sensor, since a preset threshold value is arranged in the temperature control panel, the temperature control panel compares the temperature value with the preset threshold value, when the temperature value is greater than the preset threshold value, the temperature control panel controls the heater and the electric fan to stop working, and when the temperature value is less than the preset threshold value, the temperature control panel controls the heater and the electric fan to start working to heat and raise the temperature in the inside of the box body 1;

[0039] Specifically, the water pump is started to deliver the extraction liquid into the three-way joint one 3, and another water pump is started to deliver the buffer liquid into the three-way joint one 3, the electric flow control valve on the three-way joint one 3 controls the flow of the extraction liquid and the amount of the buffer liquid to enter into the inside of the flexible hose one 4 through the three-way joint one 3, so that the flow of the extraction liquid is adjusted according to the requirement;

[0040] Furthermore, the first motor 8 is started to drive the first screw rod 7 to rotate, the first screw rod 7 drives the first threaded block 6 to move, the first threaded block 6 drives the draft tube one 5 to move above the relative extraction tank 9, at the same time, the draft tube one 5 moves to pull the flexible hose one 4 to elongate or shorten, then the extraction liquid enters into the draft tube one 5 through the three-way joint one 3 and the flexible hose one 4, and then the draft tube one 5 discharges the extraction liquid into the extraction tank 9;

[0041] The extraction liquid is discharged from the liquid discharge pipe 10 connected to the bottom of the extraction tank 9 into the Buchner funnel 12, and then filtered through the filter paper 13 in the Buchner funnel 12, and then the filtered liquid is discharged into the inside of the collection bottle 14, and the air pump 24 is started to draw the air in the inside of the filter box 22 through the air suction pipe 23 to accelerate the filtration of the extraction liquid by the filter paper 13;

[0042] After the filtration of the extraction liquid is completed, the second motor is started to drive the second screw rod 17 to rotate, the second screw rod 17 drives the second screw block 16 to move, the second screw block 16 drives the flow guide pipe two 15 to slide to the corresponding collection bottle 14, then according to the size of the pH value, the water pump of nitric acid is started and the electric valve is opened, and the other electric valve is closed, nitric acid is transported into the three-way joint two 20, then the nitric acid enters into the flow guide pipe two 15 through the three-way joint two 20 and the flexible hose two 19, then the flow guide pipe two 15 discharges the liquid into the collection bottle 14, then the electric valve on the nitric acid liquid pipeline is closed, the electric valve on the water pipeline is opened, then the water pump is started to transport water into the three-way joint two 20, then the water enters into the flow guide pipe two 15 through the three-way joint two 20 and the flexible hose two 19, then the flow guide pipe two 15 discharges the liquid into the collection bottle 14, so as to adjust the pH value of the liquid in the collection bottle 14, so that the filtration of the extraction liquid is automatically completed, and the carrying of the filtered liquid is reduced.

[0043] Finally, it should be pointed out that: first, in the description of the utility model, it should be pointed out that, unless otherwise provided and limited, the terms "installation", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative position relationship, when the absolute position of the described object changes, the relative position relationship may change;

[0044] Secondly: the utility model discloses the embodiment of the drawings, only relates to the structure involved in the embodiment of the utility model, other structures can refer to the usual design, in the case of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other;

[0045] Finally: the above only for the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A fully automatic pre-treatment extraction device for determining hexavalent chromium in soil, comprising a box (1), characterized in that: The top of the box (1) is fixedly connected with a first liquid tank (2), the first liquid tank (2) is connected with a three-way joint one (3) through a pipeline, the liquid outlet of the three-way joint one (3) is communicated with a flexible hose one (4), the other end of the flexible hose one (4) is communicated with a flow guide pipe one (5), the outer surface of the flow guide pipe one (5) is provided with a first mechanical arm for pushing the flow guide pipe one (5) to move horizontally, a extraction tank (9) is arranged below another outlet of the flow guide pipe one (5), the bottom of the extraction tank (9) is communicated with a liquid discharge pipe (10), a Buchner funnel (12) is arranged below the other end of the liquid discharge pipe (10), a collection bottle (14) is arranged below the bottom filter port of the Buchner funnel (12), the upper portion of the collection bottle (14) is provided with a flow guide pipe two (15), the surface of the flow guide pipe two (15) is installed on a second mechanical arm for pushing the flow guide pipe one (5) to move horizontally, the other end of the flow guide pipe two (15) is communicated with a flexible hose two (19), the surface of the other end of the flexible hose two (19) is fixedly connected with a filter box (22), the flexible hose two (19) is communicated with a three-way joint two (20), the three-way joint two (20) is connected with a second liquid tank (21) through a pipeline, an air extraction mechanism is installed in the filter box (22).

2. The automatic pretreatment extraction device for determining hexavalent chromium in soil according to claim 1, characterized in that: The first mechanical arm comprises a first threaded block (6), a first screw rod (7) and a first motor (8), the output end of the first motor (8) is in transmission connection with one end of the first screw rod (7) penetrating through the box (1), the first screw rod (7) is rotatably connected inside the box (1), the first screw rod (7) is in screw transmission connection with the first threaded block (6), and the flow guide pipe one (5) is fixedly installed inside the first threaded block (6).

3. The automatic pretreatment extraction device for determining hexavalent chromium in soil according to claim 1, characterized in that: A heating assembly (11) is fixedly connected inside the box (1), the heating assembly (11) comprises a heater, an electric fan and a temperature control panel, the temperature control panel is electrically connected with the heater and the electric fan respectively, so that the temperature control panel controls the speed of the electric fan and the temperature of the electric heater.

4. The automatic pretreatment extraction device for determining hexavalent chromium in soil according to claim 1, characterized in that: A filter paper (13) is installed inside the Buchner funnel (12).

5. The automatic pretreatment extraction device for determining hexavalent chromium in soil according to claim 1, characterized in that: The second mechanical arm comprises a second threaded block (16), a second screw rod (17) and a motor box (18), the motor box (18) is fixedly installed on the box (1), one side of the motor box (18) is fixedly connected with the filter box (22), a second motor is fixedly connected inside the motor box (18), the output shaft of the second motor is in transmission connection with the second screw rod (17) penetrating through the filter box (22) and one end of the box (1), the other end of the second screw rod (17) is rotatably connected with the filter box (22), the surface of the second screw rod (17) is in screw transmission connection with the second threaded block (16), and the flow guide pipe two (15) is fixedly installed inside the second threaded block (16).

6. The automatic pretreatment extraction device for determining hexavalent chromium in soil according to claim 1, characterized in that: The air extraction mechanism comprises a suction pipe (23) and an air pump (24), one end of the suction pipe (23) is communicated with the air pump (24), and the other end of the suction pipe (23) is sequentially communicated with the inner cavity of the filter box (22) through the box body (1) and the filter box (22).

7. The automatic pretreatment extraction device for determining hexavalent chromium in soil according to claim 1, characterized in that: The second liquid tank (21) comprises a nitric acid tank and a water tank, the nitric acid tank and the water tank are respectively communicated with the second liquid tank (21) through pipelines, and an electric valve is arranged on each pipeline; the first liquid tank (2) comprises an extraction liquid tank and a buffer liquid tank, the extraction liquid tank and the buffer liquid tank are respectively communicated with the three-way joint one (3) through pipelines, and an electric flow regulating valve is fixedly installed on the three-way joint one (3) and used for controlling the flow of the extraction liquid and the buffer liquid.

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