CN110850058A - Leaching test device and using method thereof - Google Patents
Leaching test device and using method thereof Download PDFInfo
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- CN110850058A CN110850058A CN201911129387.XA CN201911129387A CN110850058A CN 110850058 A CN110850058 A CN 110850058A CN 201911129387 A CN201911129387 A CN 201911129387A CN 110850058 A CN110850058 A CN 110850058A
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- 238000002386 leaching Methods 0.000 title claims abstract description 64
- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 307
- 239000002689 soil Substances 0.000 claims abstract description 31
- 239000008400 supply water Substances 0.000 claims description 8
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 238000009738 saturating Methods 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 abstract description 4
- 230000008595 infiltration Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Abstract
The invention discloses a leaching test device and a use method thereof.A water outlet hole is formed in the side wall of a water supply tank; a water inlet hole, a water outlet hole and a constant head hole are formed in the side wall of the constant head water tank, the water inlet hole and the water outlet hole of the constant head water tank are formed in positions close to the bottom of the constant head water tank, and the constant head hole is formed above the water inlet hole and the water outlet hole of the constant head water tank; the top and the bottom of a cavity for containing the soil column in the leaching device are respectively provided with a first cavity and a second cavity, and the first cavity and the second cavity are respectively communicated with the cavity for containing the soil column through a plurality of through holes; the water outlet of the water supply tank is communicated with the water inlet of the constant head water tank through a connecting pipe, and the water outlet of the constant head water tank is communicated with the first cavity or the second cavity; the constant head water tank is hung on the bracket and can ascend or descend along the bracket. The invention can ensure the steady state infiltration of the leaching test, ensure uniform water distribution, ensure the integrity of the soil column and ensure more accurate test results.
Description
Technical Field
The invention belongs to the technical field of polluted soil environment restoration, and particularly relates to a leaching test device and a using method thereof.
Background
In recent years, with the rapid development of economy, soil and water pollution is becoming more serious, and the pollution threatens the development and utilization of environmental ecology and underground water and further influences the health of human bodies. The leaching test is one of test methods for researching the migration characteristic of pollutants in a medium, and can reflect the migration, leaching, conversion and the like of the pollutants and know the change of the concentration and the like of the pollutants on different time and space. Therefore, the application of the leaching test device is one of effective means for researching the migration and transformation of the pollutants in the medium.
At present, a plurality of laboratory leaching test devices are provided, and a static leaching test and a dynamic column test are mainly provided for a heavy metal contaminated soil test, and the tests are difficult to ensure steady infiltration; some leaching devices are arranged, the upper end of the earth pillar cylinder is continuously kept at a constant water head height and is guaranteed by small holes in the side wall, the structure of the earth pillar cylinder is damaged by the holes, the earth pillar cylinder is only suitable for the current water head height, and the water head height cannot be adjusted according to different experimental requirements.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a leaching test device and a using method thereof, which can ensure steady state infiltration of a leaching test, ensure uniform water distribution, ensure the integrity of a leaching soil column and ensure more accurate test results.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a leaching test device comprises a water supply tank, a bracket, a constant head tank and a leaching device, wherein a water outlet hole is formed in the side wall of the water supply tank, and the water outlet hole of the water supply tank can be opened or closed; the side wall of the constant head water tank is provided with a water inlet hole, a water outlet hole and a constant head hole, the water inlet hole and the water outlet hole of the constant head water tank are arranged at positions close to the bottom of the constant head water tank, the water inlet hole and the water outlet hole of the constant head water tank can be opened or closed, and the constant head hole is arranged above the water inlet hole and the water outlet hole of the constant head water tank; the top and the bottom of a cavity for accommodating the soil column in the leaching device are respectively provided with a first cavity and a second cavity, and the first cavity and the second cavity are respectively communicated with the cavity for accommodating the soil column through a plurality of through holes; the water outlet of the water supply tank is communicated with the water inlet of the constant head water tank through a connecting pipe, and the water outlet of the constant head water tank is communicated with the first cavity or the second cavity; the constant head water tank is hung on the bracket and can ascend or descend along the bracket.
Further, the water tank fixing box is further included, and the constant head water tank is placed in the water tank fixing box; the support comprises a base, upright columns and a cross rod, wherein two sides of the base are respectively provided with one upright column in a facing manner, one cross rod is connected with two upright columns, two fixed pulleys are arranged on the cross rod, a rotating shaft is arranged on one upright column, a pull rope is wound on the rotating shaft, and one end of the pull rope passes through the fixed pulleys and then is connected with the water tank fixing box; one side of the water tank fixing box close to the stand column is provided with two first limiting rods respectively, and the first limiting rods at the same side are clamped on two sides of the stand column respectively.
Furthermore, the top and the bottom of the water tank fixing box are provided with limiting holes, second limiting rods are arranged in the limiting holes and are in clearance fit with the limiting holes, one end of each second limiting rod is connected with the base, and the other end of each second limiting rod is connected with the cross rod.
Further, the water supply tank is placed in another water tank fixing box, and the mounting structure of the water tank fixing box for placing the water supply tank is the same as that of the water tank fixing box for placing the constant head water tank.
Furthermore, valves are respectively installed on the water inlet hole and the water outlet hole of the constant head water tank, and the valves are used for controlling the opening and closing of the water inlet hole and the water outlet hole.
Further, a valve is installed on the water outlet hole of the water supply water tank, and the valve is used for controlling the opening and closing of the water outlet hole.
Furthermore, a connecting pipe is connected to the water fixing head hole, and the other end of the connecting pipe is connected with a water receiving container.
Furthermore, the upright post is provided with scale marks.
Furthermore, a handle is arranged on the rotating shaft.
Furthermore, the upper part and the lower part of the leaching device are uniformly provided with a plurality of holes at the contact part with the soil column.
Furthermore, the upper bottom of the leaching device is connected with the lower bottom of the leaching device through a screw and a nut, and the leaching device is matched with a gasket for use.
A using method of a leaching test device comprises the steps of communicating a water outlet hole of a constant head water tank with a second cavity, opening a water outlet of a water supply water tank and a water inlet of the constant head water tank, opening a water outlet of the constant head water tank, and saturating an earth column until the water head value of the constant head water tank is consistent with the top height of the earth column, so that the earth column is saturated; closing a water outlet of the constant head water tank, communicating a water outlet hole of the constant head water tank with the first cavity, and determining a water level height value in the constant head water tank to enable water to flow out of the constant head hole; and adjusting the height of the constant head water tank to reach the height of the hydraulic gradient required by the test, and opening the water outlet of the constant head water tank to perform a leaching test.
Compared with the prior art, the invention has at least the following beneficial effects: when the leaching test device is used, the water inlet is opened, so that water flows into the fixed head water tank from the water supply water tank, the position of a water head in the fixed head water tank is required to be controlled to be just positioned at the position of the fixed head hole, and the water head value required by an experiment is further reached by adjusting the height of the fixed head water tank and observing the water level value of the fixed head water tank; the water inlet of the constant head water tank is opened, water can flow out continuously from the constant head hole, the water inlet valve is adjusted by observing the water outlet speed of the constant head hole, so that the balance of supply and demand is well realized, the stability of the constant head is ensured, the waste of leaching liquid is also avoided, the soil column needs to be saturated before the formal test is started, the water outlet hole of the constant head water tank is communicated with the second cavity in the saturation process, the method that water flows from the lower part to the upper part of the leaching device is adopted, the water is enabled to fully saturate the soil column under the action of capillary force, when the formal test is started, the water outlet hole of the constant head water tank is communicated with the first cavity, the water enters the soil column from the upper part to the lower part of the leaching device, and the leaching test is started. In conclusion, the invention can flexibly adjust the water head value of the water supply tank, so that the leaching soil column can conveniently and accurately control the stability of the constant water head while realizing full saturation, thereby ensuring the stability of hydraulic gradient as much as possible, ensuring the steady infiltration of the leaching test and ensuring more accurate test result. In addition, the change of the height of the constant head water tank avoids the difference of hydraulic gradient caused by drilling holes on the soil column, ensures the integrity of the soil column and is convenient for realizing leaching experiments under the transformation of a plurality of hydraulic gradient; the top and the bottom of a cavity used for accommodating the earth pillar in the leaching device are respectively provided with a first cavity and a second cavity, the first cavity and the second cavity can be used for storing water, so that water firstly enters the cavity at the upper part (the lower part) of the leaching device and then enters the earth pillar after coming out of the constant head water tank, the water is prevented from directly entering the earth pillar, the scouring of the earth pillar when the water directly contacts the earth pillar is reduced, and the water distribution uniformity in the test process is also ensured.
Furthermore, two fixed pulleys are arranged on the cross rod, a rotating shaft is arranged on one upright post, a pull rope is wound on the rotating shaft, and one end of the pull rope is connected with the water tank fixing box after passing through the fixed pulleys, so that the water head is more conveniently adjusted; the constant head water tank is placed in the water tank fixing box, two first limiting rods are arranged on one side, close to the stand column, of the water tank fixing box respectively, the first limiting rods on the same side are clamped on the two sides of the stand column respectively, the first limiting rods can prevent the water tank fixing box from swinging back and forth, the constant head water tank is made to be more stable, and improvement of experiment precision is facilitated.
Further, the top and the bottom of the water tank fixing box are right provided with limiting holes, a second limiting rod is arranged in each limiting hole, the second limiting rod is in clearance fit with the limiting holes, one end of the second limiting rod is connected with the base, the other end of the second limiting rod is connected with the cross rod, the second limiting rod can prevent the water tank fixing box from swinging left and right, and the problem that an experimental result is inaccurate due to swinging can be avoided.
Furthermore, the water supply tank adopts the same mounting structure as the constant head water tank, the height of the water supply tank is conveniently controlled, the water supply tank is adjusted to be higher than the constant head water tank, liquid inlet is realized by the action of the gravity of the solution, and energy and use cost are saved.
Furthermore, valves are respectively arranged on a water inlet hole and a water outlet hole of the constant head water tank, so that the water quantity of the constant head water tank and the leaching time can be effectively controlled.
Furthermore, a connecting pipe is connected to the water fixing head hole, and the other end of the connecting pipe is connected with a water receiving container, so that water can be recycled conveniently.
Furthermore, the upright post is provided with scale marks, so that the water head value in the test process can be conveniently determined.
Furthermore, a handle is arranged on the rotating shaft and used for conveniently controlling the rotating shaft to rotate, and the effect of easily changing the water head is achieved.
Furthermore, the upper part and the lower part of the leaching device are provided with a plurality of holes at the contact parts with the soil column, so that water can smoothly enter the soil column for saturation and leaching tests.
Furthermore, the upper part and the lower part of the leaching device are connected through nuts and screw caps and matched with gaskets for use, so that the sealing performance of the soil column in the experimental process is ensured, and the experimental result is more accurate.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the apparatus of the present invention.
FIG. 2 is a schematic structural view of the stent of the present invention.
Fig. 3 is a schematic view of the water tank fixing box of the present invention.
In the figure: 1. a rotating shaft; 2. a water supply tank; 3. a fixed pulley; 4. a support; 41. a base; 42. a column; 43. a cross bar; 5. a constant head water tank; 6. a water tank fixing box; 61. a first limit rod; 62. a limiting hole; 63. a second limiting rod; 7. a connecting pipe; 8. a leaching device; 9. a water receiving container; 10. pulling a rope; 11. a handle; 12. a first cavity; 13. a soil column; 14. a second cavity; 15. a conical flask.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As a specific embodiment of the present invention, referring to fig. 1, 2 and 3, a leaching test apparatus includes a water supply tank 2, a bracket 4, a constant head tank 5 and a tank fixing box 6, wherein a water outlet is formed in a side wall of the water supply tank 2, and the water outlet of the water supply tank 2 can be opened or closed, and specifically, a valve is installed on the water outlet of the water supply tank 2, and the valve controls the opening and closing of the water outlet. The inlet opening, apopore and constant head of water hole have been seted up on the lateral wall of constant head water tank 5, and the inlet opening and the apopore of constant head water tank 5 are seted up in the position that is close to constant head water tank 5 bottom, and the inlet opening and the apopore of constant head water tank 5 all can be opened or close, and is concrete, and the valve is installed respectively to the inlet opening and the apopore of constant head water tank 5, and the valve is used for controlling the switching of inlet opening and apopore. The water head hole is fixed and is seted up in the inlet opening and the apopore top of fixed head water tank 5, and fixed head hole can be followed fixed head water tank 5 lateral wall direction of height and seted up a plurality ofly, when seting up a plurality ofly, installs the valve on every fixed head hole respectively. The top and the bottom of the cavity for accommodating the soil column 13 in the leaching device 8 are respectively provided with a first cavity 12 and a second cavity 14, and the first cavity 12 and the second cavity 14 are respectively communicated with the cavity for accommodating the soil column 13 through a plurality of through holes. As shown in fig. 1, the water outlet of the water supply tank 2 is communicated with the water inlet of the constant head tank 5 through a connecting pipe 7, the connecting pipe 7 is a hose, preferably, the constant head is also connected with the connecting pipe 7, and the other end of the connecting pipe 7 is connected with a water receiving container 9, so that water can be recycled; the apopore of constant head water tank 5 and first cavity 12 intercommunication, or with second cavity 14 intercommunication, that is to say, the apopore of constant head water tank 5 and the connection between leaching device 8 can communicate through first cavity 12, also can communicate through second cavity 14, specifically select the intercommunication according to the experimental procedure. The first cavity 12 and the second cavity 14 can be used for storing water, so that water coming out of the constant head water tank 5 is prevented from directly contacting the soil column 13, the soil column 13 is prevented from being washed by water, and the integrity of the soil column structure is guaranteed. The first cavity 12 and the second cavity 14 are respectively communicated with a cavity for accommodating the earth pillar 13 through a plurality of through holes, so that smooth water passing in the test process is ensured, and the water distribution uniformity in the test process is also ensured while the integrity of the earth pillar is protected by matching with gauze.
Referring to fig. 1, 2 and 3, the constant head water tank 5 is placed in a water tank fixing box 6, and the water tank fixing box 6 is a square iron box. The support 4 comprises a base 41, a stand column 42 and a cross bar 43, wherein two sides of the base 41 are respectively fixed with the stand column 42 in a facing welding mode, and preferably, the stand column 42 is provided with scale marks so as to conveniently determine a water head value in the test process; a horizontal pole 43 and two stands 42 are welded, two fixed pulleys 3 are fixed on the horizontal pole 43, a rotating shaft 1 is fixed on one stand 42, and preferably, a handle 11 is arranged on the rotating shaft 1, so that the operation and the rotation are convenient. The winding has stay cord 10 in pivot 1, and wire rope is chooseed for use to stay cord 10, and the one end of stay cord 10 is connected with the top of the fixed box 6 of water tank behind fixed pulley 3, and connects the top central point who fixes the box 6 at the water tank and put, ensures that the atress is balanced. As shown in fig. 3, two first limiting rods 61 are welded on one side of the water tank fixing box 6 close to the upright post 42, the first limiting rods 61 on the same side are clamped on two sides of the upright post 42, the first limiting rods 61 can prevent the water tank fixing box 6 from swinging back and forth, and the design of the first limiting rods 61 makes the water tank fixing box 6 more stable when performing lifting movement on the upright post 42; just to having seted up spacing hole 62 in the top and the bottom of the fixed box 6 of water tank, wear to be equipped with a second gag lever post 63 in the spacing hole 62, second gag lever post 63 and spacing hole 62 clearance fit, the one end and the base 41 of second gag lever post 63 are connected, the other end is connected with horizontal pole 43, second gag lever post 63 can prevent the fixed box 6 horizontal hunting of water tank, the design of the fixed box 6 of water tank can be avoided leading to the unsafe problem of experimental result because of the swing acutely like this.
As a preferred embodiment of the present invention, the water supply tank 2 is also placed in one tank fixing box 6, and the installation structure of the tank fixing box 6 for placing the water supply tank 2 is the same as the installation structure of the tank fixing box 6 for placing the constant head tank 5, so that the height of the tank fixing box 6 for placing the water supply tank 2 is greater than the height of the tank fixing box 6 for placing the constant head tank 5 by controlling the rotating shaft 1, and the water in the water supply tank 2 enters the constant head tank 5 by the action of the gravity of the solution, so that other external force action is not needed, and energy and use cost are saved.
The use method of the leaching test device comprises the following steps:
firstly, connecting a water supply tank 2, a constant head water tank 5 and a second cavity 14 of a leaching device 8 through a connecting pipe 7, wherein a water inlet of the leaching device 8 is selected at the bottom of a soil column 13, and water enters from the lower part of the leaching device 8;
secondly, the rotating shaft 1 is shaken through the handle 11, so that the height of the water supply tank 2 is greater than that of the constant head water tank 5, and the water supply can enter the constant head water tank 5 under the action of gravity;
thirdly, closing a valve of a constant head hole of the constant head water tank 5, opening a valve of a water outlet of the water supply water tank 2 and a valve of a water inlet of the constant head water tank 5, rotating the opening and closing degree of the valves, adjusting the water flux between the water supply water tank 2 and the constant head water tank 5, and ensuring that the water supply water tank 2 can continuously supply water to the constant head water tank 5;
fourthly, the rotating shaft 1 is shaken through the handle 11 to enable the constant head water tank 5 to be at a proper height, and the soil column 13 below the constant head value of the constant head water tank 5 is fully saturated under the action of capillary force through the principle of a communicating vessel; raising the height of the constant head water tank 5 at intervals until the water head value is consistent with the top height of the soil column 13, and fully saturating the whole soil column by applying the same principle;
fifthly, closing the water outlet of the constant head water tank 5, and changing the position of the water inlet of the leaching device 8, namely connecting the water outlet of the constant head water tank 5 with the first cavity 12 of the leaching device 8 by using the connecting pipe 7 to enable water to enter from the first cavity 12 of the leaching device 8;
sixthly, determining the height value of the water level in the constant head water tank 5 to ensure that water continuously flows out from the constant head hole, playing a role of stabilizing the head, and collecting the flowing water by using a water receiving container 11;
and seventhly, the rotating shaft 1 is shaken through the handle 11, the height of the constant head water tank 5 is adjusted, the height of the hydraulic gradient required by the test is achieved, the water outlet of the constant head water tank 5 is opened at the moment, the leaching test is carried out, and the water flowing out of the leaching device 8 is collected by the conical flask 15 and is used for result analysis in the later stage.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A leaching test device is characterized in that: the water supply device comprises a water supply tank (2), a bracket (4), a constant head water tank (5) and a leaching device (8), wherein the side wall of the water supply tank (2) is provided with a water outlet hole, and the water outlet hole of the water supply tank (2) can be opened or closed; a water inlet hole, a water outlet hole and a constant head hole are formed in the side wall of the constant head water tank (5), the water inlet hole and the water outlet hole of the constant head water tank (5) are formed in positions close to the bottom of the constant head water tank (5), the water inlet hole and the water outlet hole of the constant head water tank (5) can be opened or closed, and the constant head hole is formed above the water inlet hole and the water outlet hole of the constant head water tank (5); the top and the bottom of a cavity for accommodating the soil column (13) in the leaching device (8) are respectively provided with a first cavity (12) and a second cavity (14), and the first cavity (12) and the second cavity (14) are respectively communicated with the cavity for accommodating the soil column (13) through a plurality of through holes; the water outlet of the water supply tank (2) is communicated with the water inlet of the constant head water tank (5) through a connecting pipe (7), and the water outlet of the constant head water tank (5) is communicated with the first cavity (12) or the second cavity (14); the constant head water tank (5) is hung on the support (4) and can ascend or descend along the support (4).
2. A leaching test apparatus according to claim 1, wherein: the constant head water tank is characterized by further comprising a water tank fixing box (6), wherein the constant head water tank (5) is placed in the water tank fixing box (6); the support (4) comprises a base (41), upright posts (42) and a cross rod (43), wherein two sides of the base (41) are respectively provided with one upright post (42) in a facing manner, one cross rod (43) is connected with the two upright posts (42), two fixed pulleys (3) are arranged on the cross rod (43), a rotating shaft (1) is arranged on one upright post (42), a pull rope (10) is wound on the rotating shaft (1), and one end of the pull rope (10) is connected with the water tank fixing box (6) after passing through the fixed pulleys (3); two first limiting rods (61) are respectively arranged on one side, close to the upright post (42), of the water tank fixing box (6), and the first limiting rods (61) on the same side are respectively clamped on two sides of the upright post (42).
3. A leaching test apparatus according to claim 2, wherein: the water tank fixing box is characterized in that the top and the bottom of the water tank fixing box (6) are provided with limiting holes (62) in a facing mode, second limiting rods (63) are arranged in the limiting holes (62), the second limiting rods (63) are in clearance fit with the limiting holes (62), one ends of the second limiting rods (63) are connected with the base (41), and the other ends of the second limiting rods (63) are connected with the cross rod (43).
4. A leaching test apparatus according to claim 3, wherein: the water supply tank (2) is placed in another water tank fixing box (6), and the mounting structure of the water tank fixing box (6) for placing the water tank (2) is the same as that of the water tank fixing box (6) for placing the constant head water tank (5).
5. A leaching test apparatus according to claim 1, wherein: valves are respectively installed on the water inlet hole and the water outlet hole of the constant head water tank (5), and the valves are used for controlling the opening and closing of the water inlet hole and the water outlet hole.
6. A leaching test apparatus according to claim 1, wherein: the valve is installed to the apopore of water supply tank (2), the valve is used for controlling the switching of apopore.
7. A leaching test apparatus according to claim 1, wherein: the water fixing head hole is connected with a connecting pipe (7), and the other end of the connecting pipe (7) is connected with a water receiving container (9).
8. A leaching test apparatus according to claim 2, wherein: the upright post (42) is provided with scale marks.
9. A leaching test apparatus according to claim 2, wherein: and a handle (11) is arranged on the rotating shaft (1).
10. A method of using a leaching test apparatus according to any of claims 1 to 9, wherein: communicating a water outlet hole of the constant head water tank (5) with a second cavity (13), opening a water outlet of the water supply water tank (2) and a water inlet of the constant head water tank (5), opening a water outlet of the constant head water tank (5), and saturating the earth column until a water head value of the constant head water tank (5) is consistent with the top height of the earth column, so that the earth column is saturated; closing a water outlet of the constant head water tank (5), communicating a water outlet hole of the constant head water tank (5) with the first cavity (12), and determining a water level height value in the constant head water tank (5) to enable water to flow out of a constant head hole; and adjusting the height of the constant head water tank (5) to reach the height of the hydraulic gradient required by the test, and opening the water outlet of the constant head water tank (5) to perform a leaching test.
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| CN201911129387.XA CN110850058B (en) | 2019-11-18 | 2019-11-18 | Leaching test device and application method thereof |
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| CN201911129387.XA CN110850058B (en) | 2019-11-18 | 2019-11-18 | Leaching test device and application method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588510A (en) * | 2021-06-11 | 2021-11-02 | 南京林业大学 | Device for undisturbed soil column infiltration test and operation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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