Double-ring infiltration instrument for water injection test

Abstract

The utility model belongs to the technical field of double-ring infiltration instruments, and particularly relates to a double-ring infiltration instrument for a water injection test. Comprising an outer ring and an inner ring located in the outer ring, two supporting plates are arranged above the outer ring and the inner ring, two water injection bottles are arranged between the two supporting plates, four supporting rods are installed on the two supporting plates in a penetrating mode, each supporting rod is in threaded connection with four butterfly nuts, a limiting hole is formed in the supporting plate on the upper side, a limiting ring is arranged on the inner ring, and the limiting ring is connected with the limiting holes in a threaded mode. A limiting groove is formed in the bottom of the limiting ring, a plurality of fixing plates are arranged on the inner wall of the outer ring, sliding grooves extending to the tops of the fixing plates and the outer wall of the limiting ring are formed in the inner walls of the fixing plates and the outer wall of the limiting ring, the two sliding grooves are connected through a pressing plate, through grooves are formed in the two ends of the pressing plate, and a limiting plate is arranged at the bottom in each sliding groove. The limiting plate is provided with two elastic pieces abutting against the pressing plate. According to the utility model, the height difference between the outer ring and the inner ring can be avoided while the axis consistency of the outer ring and the inner ring can be better ensured, and the accuracy of water injection test data is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to double ring infiltration appearance technical field especially is concerned with a double ring infiltration appearance for water injection test. BACKGROUND

[0002] In water conservancy and hydropower engineering geological survey, accurate evaluation of soil permeability is crucial to engineering design, construction and operation, soil permeability not only affects groundwater flow, reservoir storage and drainage efficiency, but also is closely related to dam foundation stability, channel leakage and soil erosion, and water injection test for water conservancy and hydropower engineering geological survey usually uses double ring infiltration appearance, the main reason for using double ring infiltration appearance in water injection test is to improve the accuracy of measurement and reduce errors; Double ring infiltration appearance uses two concentric stainless steel rings (inner ring and outer ring) to perform water injection test, the amount of water infiltration into soil per unit time is measured to calculate the soil permeability coefficient, the inner ring is used to control the test area to ensure that the water flows vertically into the soil; The outer ring plays a role in isolating lateral seepage, improving the accuracy of measurement, recording test time and water level change, and calculating soil permeability coefficient according to Darcy's law.

[0003] When double ring infiltration appearance is used, the double ring is pressed into the soil, water is injected into the inner ring and outer ring at the same time, and the water column height of the inner and outer rings is kept consistent to eliminate the influence of lateral seepage, but the double ring is easy to tilt when inserted into the soil, the water level observed by the scale will not be accurate, and the inner and outer ring shaft centers are different, which causes the water infiltration path in the soil to deviate, affecting the accuracy of the test results. INVENTION CONTENTS

[0004] The utility model aims at providing a double ring infiltration appearance for water injection test, which ensures that the inner and outer ring shaft centers are consistent and avoids the height difference between the inner and outer rings, ensuring the accuracy of experimental data.

[0005] The double ring infiltration appearance for water injection test comprises an outer ring and an inner ring located in the outer ring, two support plates are horizontally arranged above the outer ring and the inner ring, two water injection bottles are arranged between the two support plates, four support rods in rectangular distribution are independently arranged on the two support plates, four butterfly nuts for limiting the position of the support plate are threadedly connected to each support rod, a limiting hole for limiting the displacement of the water injection bottle is formed in the upper support plate, a limiting ring is arranged on the inner ring, a limiting groove for embedding the top of the inner ring is formed in the bottom of the limiting ring, a plurality of fixing plates are arranged on the inner wall of the outer ring, a sliding groove extending to the top of the fixing plate is formed in the inner wall of the fixing plate and the outer wall of the limiting ring, the two sliding grooves are connected by a pressing plate, a through groove is formed in both ends of the pressing plate, a limiting plate is arranged at the bottom of each sliding groove, and two elastic sheets abutting against the pressing plate are arranged on the limiting plate.

[0006] Further, the two support rods distributed in front and back are connected through a bottom plate.

[0007] Further, the top of the pressing plate is provided with a bubble level.

[0008] Further, the top of the pressing plate is provided with a bubble level.

[0009] Further, the inner wall of the limiting groove of the limiting ring is provided with an internal thread, and the outer lateral wall of the inner ring is provided with an external thread in threaded cooperation with the internal thread.

[0010] Further, the several pressing plates are distributed in a circumferential array along the axis of the outer ring.

[0011] Further, the sidewall of the water injection bottle is provided with a water outlet, and a faucet is installed at the water outlet.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model discloses a limiting groove fixes the limiting ring on the inner ring, and the several pressing plates are slid into the sliding slot of the fixed plate and the limiting ring, the through slot of the both ends of the pressing plate is extruded two elastic sheets, and then is clamped with the limiting plate, utilizes the several pressing plates to drive the outer ring and the inner ring to insert into the soil under the uniform stress, guarantees that the outer ring and the inner ring are consistent in height, then utilizes four support rods to support the water injection bottle and the support plate between the two support plates, makes it be located on the outer ring and the inner ring, carries out the water injection test, can better guarantee that the outer ring and the inner ring are consistent in axis and avoid the height difference of the outer ring and the inner ring, guarantees the accuracy of water injection test data. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the utility model;

[0015] Figure 2 It is the three-dimensional view of the utility model;

[0016] Figure 3 It is the explosion drawing of the utility model;

[0017] The names of various components in the drawing are as follows: 1, outer ring;2, support rod;3, fixed plate;4, bubble level;5, pressing plate;6, water injection bottle;7, butterfly nut;8, limiting ring;9, limiting plate;10, support plate;11, threaded rod;12, inner ring;13, bottom plate;14, elastic sheet. DETAILED DESCRIPTION

[0018] The utility model makes further illustration through specific embodiment combining with the drawings, but is not used to limit the utility model, any modification, equivalent replacement, improvement etc. that is made in the utility model spirit and principle, should contain in the utility model's protection scope.

[0019] Embodiment

[0020] The double-ring infiltration instrument for water injection test described in the embodiment, as shown in Figure 1 、 Figure 2 and Figure 3 , includes outer ring 1 and inner ring 12 located in outer ring 1, two support plates 10 are horizontally arranged above outer ring 1 and inner ring 12, two water injection bottles 6 are arranged between the two support plates 10, four support rods 2 distributed in a rectangular shape are independently threaded on the two support plates 10, four butterfly nuts 7 for limiting the position of support plate 10 are threaded on each support rod 2, the upper support plate 10 is provided with a limiting hole for limiting the displacement of water injection bottle 6, the inner ring 12 is provided with a limiting ring 8, the bottom of limiting ring 8 is provided with a limiting groove for embedding the top of inner ring 12, a plurality of fixed plates 3 are arranged on the inner wall of outer ring 1, corresponding fixed plates 3 are provided with a sliding groove extending to the top of the inner wall of fixed plate 3 and the outer wall of limiting ring 8, the two sliding grooves are connected through pressing plate 5, the both ends of pressing plate 5 are provided with a through groove, the bottom of each sliding groove is provided with a limiting plate 9, the limiting plate 9 is provided with two elastic sheets 14 abutting against pressing plate 5;

[0021] The inner ring 12 is located in the outer ring 1, and the outer ring 1 and the inner ring 12 have two support plates 10 on the upper side, two water injection bottles 6 are placed on the top of the lower support plate 10, the bottle opening of the water injection bottle 6 extends out of the upper limiting hole, the bottle opening of the water injection bottle 6 is threadedly connected with a bottle cap, the water injection bottle 6 is closed through the bottle cap to avoid water overflow in the water injection bottle 6, water is injected into the water injection bottle 6 through the bottle opening, and water can also be injected into the water injection bottle 6 through the bottle opening during the water injection test. The upper support plate 10 is pressed on the bottle body of the water injection bottle 6, so that the two water injection bottles 6 are fixed between the two support plates 10; four through holes are formed in the two support plates 10, four support rods 2 are arranged on the two support plates 10 through the through holes, the support rods 2 support the two support plates 10, and the support rods 2 are provided with external threads, a plurality of butterfly nuts 7 threadedly matched with the external threads are sleeved on the support rods 2, the support plates 10 are fixed on the support rods 2 through the upper and lower butterfly nuts 7, the position of the support plates 10 is limited, and the position of the water injection bottles 6 is also fixed. The bottom of the four support rods 2 is in contact with the ground, so that the two support plates 10 are located above the outer ring 1 and the inner ring 12, and the water injection test can be performed; and a water outlet is formed in the side wall of the water injection bottle 6, a water faucet is installed at the water outlet, and a water injection pipe is connected to the water outlet of the water faucet. It is convenient to inject water in the two water injection bottles 6 into the outer ring 1 and the inner ring 12, the water faucet can accurately control the start and stop of water injection and the flow of water injection, so as to ensure that the water level of the outer ring 1 and the inner ring 12 can be kept consistent during the experiment, and the accuracy of the experiment is improved; the water faucet controls the water injection, which can avoid unnecessary waste and inject water only when needed, thereby saving water resources; the convenient operation of the water faucet makes the water injection process faster and more efficient, reduces the waiting time during the experiment, and improves the overall experimental efficiency;

[0022] The limiting groove opened at the bottom of the limiting ring 8 can be clamped at the top of the inner ring 12, and then the limiting ring 8 is fixed on the inner ring 12. The inner side wall of the outer ring 1 is welded or pasted with a plurality of fixed plates 3. The inner side wall of the fixed plate 3 is provided with a sliding groove. The sliding groove extends to the top of the fixed plate 3. The position corresponding to the fixed plate 3 is provided with a sliding groove consistent with the sliding groove on the fixed plate 3 on the outer side wall of the limiting ring 8. The plurality of sliding grooves on the outer side wall of the limiting ring 8 extend to the top of the limiting ring 8. The pressing plate 5 is slid into the two sliding grooves from the top of the fixed plate 3 and the top of the limiting ring 8, thereby connecting the fixed plate 3 and the limiting ring 8. The plurality of pressing plates 5 connect the plurality of fixed plates 3 and the limiting ring 8. The plurality of pressing plates 5 are distributed in a circumferential array along the axis of the outer ring 1. The pressing plate 5 is four pieces, which are uniformly distributed. When the pressing plate 5 is slid into the sliding groove of the fixed plate 3 and the limiting ring 8, the pressing plate 5 is pressed downward, which simultaneously drives the outer ring 1 and the inner ring 12 to be inserted into the soil. The four pressing plates 5 make the outer ring 1 and the inner ring 12 bear force uniformly, so that the height remains consistent after being inserted into the soil, thereby effectively reducing the lateral seepage caused by water level difference. When the water level of the outer ring 1 and the inner ring 12 is consistent, it can be considered that the water infiltrated by the inner ring 12 is mainly consumed in vertical infiltration, and the outer ring 1 plays a role in ensuring the vertical downward infiltration of the inner ring 12 and reducing lateral seepage, so that the measurement result is more accurate and can more truly reflect the soil infiltration performance. The four pressing plates 5 are consistent in length, so that the outer ring 1 and the inner ring 12 are located at the same axis. The axis positions of the outer ring 1 and the inner ring 12 are the same, which can ensure that the outer ring 1 effectively surrounds the inner ring 12, thereby preventing the lateral seepage of water in the supporting rod 2 and ensuring the accuracy of measurement. When the axis positions of the outer ring 1 and the inner ring 12 are consistent, the water level difference measurement of the outer ring 1 and the inner ring 12 is more accurate, thereby calculating more accurate soil infiltration rate. The outer ring 1 and the inner ring 12 with the same axis position make the double-ring infiltration instrument more stable during operation, easy to align and insert into the soil, and improve the efficiency and convenience of measurement.

[0023] The two ends of the pressing plate 5 are provided with through grooves. The inner bottom of the sliding groove of the fixed plate 3 and the inner bottom of the sliding groove of the limiting ring 8 are vertically provided with limiting plates 9. The limiting plate 9 is provided with two elastic sheets 14. When the two ends of the pressing plate 5 are slid into the sliding groove, the through grooves at the ends of the pressing plate 5 extrude the two elastic sheets 14 to be compressed, so that the limiting plate 9 is clamped in the through groove after the pressing plate 5 passes through the two elastic sheets 14. The two elastic sheets 14 restore to the original state under the elastic force of themselves. The end of the elastic sheet 14 abuts against the top of the pressing plate 5, thereby fixing the pressing plate 5 and better connecting the pressing plate 5 with the fixed plate 3 and the limiting ring 8. The four pressing plates 5 better press the outer ring 1 and the inner ring 12, so that the height remains consistent after being inserted into the soil. When the pressing plate 5 needs to be detached from between the fixed plate 3 and the limiting ring 8, the two elastic sheets 14 can be extruded, and then the end of the pressing plate 5 is taken off from the limiting plate 9 and the two elastic sheets 14, thereby the outer ring 1 and the inner ring 12 can be detached. The installation box is convenient to disassemble and use more flexibly.

[0024] In actual use, the limiting ring 8 is clamped on the inner ring 12 through the limiting groove, then a plurality of pressing plates 5 are slid into the sliding grooves of the fixing plate 3 and the limiting ring 8, the through groove at the end of the pressing plate 5 is clamped on the limiting plate 9 after passing through the two elastic sheets 14, thereby fixing the pressing plate 5, and then the outer ring 1 and the inner ring 12 are connected, and the downward pressure is applied to the outer ring 1 and the inner ring 12 under the cooperation of the plurality of pressing plates 5, so that the outer ring 1 and the inner ring 12 are uniformly stressed, the outer ring 1 and the inner ring 12 are inserted into the soil, the height of the outer ring 1 and the inner ring 12 is kept consistent, the water injection test is better performed, and the soil permeability can be more truly reflected; then the four supporting rods 2 are placed around the outer ring 1, two water injection bottles 6 are placed between the two supporting plates 10, the two supporting plates 10 are fixed on the supporting rods 2 through the butterfly nut 7, and the position of the water injection bottle 6 is limited, so that the injection test is more convenient, and the measurement result is more accurate.

[0025] The two front and rear supporting rods 2 are connected through a bottom plate 13 in the embodiment, the bottom of each two front and rear supporting rods 2 among the four rectangularly distributed supporting rods 2 is connected through a bottom plate 13, the bottom plate 13 is welded or pasted at the bottom of the two supporting rods 2, the contact area with the ground can be increased through the bottom plate 13, the supporting rods 2 support the supporting plates 10 and the water injection bottles 6 more stably, and the supporting rods 2 are prevented from being tilted during the water injection test;

[0026] The top of the pressing plate 5 is provided with a bubble level 4 in the embodiment, the bubble level 4 is installed at the top of the pressing plate 5, the bubble level 4 can accurately measure whether the pressing plate 5 is in a horizontal state, and then the horizontal state of the outer ring 1 and the inner ring 12 is obtained, so that the outer ring 1 and the inner ring 12 are ensured to be on the same horizontal plane, thereby avoiding the measurement error caused by unevenness, when the outer ring 1 and the inner ring 12 are kept horizontal, the water in the inner ring 12 can be ensured to vertically infiltrate, the influence of lateral seepage is reduced, and the measurement accuracy of the soil permeability is improved, the bubble level 4 can be quickly and simply checked and adjusted to the horizontal state of the outer ring 1 and the inner ring 12, thereby simplifying the experimental operation and improving the work efficiency, and a threaded hole is formed at the top of the pressing plate 5, a threaded rod 11 fixed at the bottom of the bubble level 4 is screw-connected in the threaded hole, the bubble level 4 is welded or pasted with the threaded rod 11 at the bottom, the bubble level 4 is screw-connected at the top of the pressing plate 5 through the threaded rod 11, when the bubble level 4 is needed to detect the horizontal state of the pressing plate 5, the bubble level 4 can be installed on the pressing plate 5, and when the bubble level 4 is not needed, the bubble level 4 can be detached, without affecting the use of the pressing plate 5, and the use is more flexible;

[0027] The embodiment further illustrates the technology. The inner wall of the limiting groove of the limiting ring 8 is provided with an internal thread, and the outer side wall of the inner ring 12 is provided with an external thread in threaded cooperation with the internal thread. The internal thread formed in the inner wall of the limiting groove of the bottom of the limiting ring 8 is in threaded cooperation with the external thread on the upper end of the outer side wall of the inner ring 12, so as to fix the limiting ring 8 on the inner ring 12, make the connection of the limiting ring 8 and the inner ring 12 more stable, better insert the outer ring 1 and the inner ring 12 into the soil, ensure the consistency of the height, and facilitate the installation and dismounting of the limiting ring 8.

Claims

1. A double-ring infiltration instrument for water injection test, comprising an outer ring (1) and an inner ring (12) located in the outer ring (1), two support plates (10) are horizontally arranged above the outer ring (1) and the inner ring (12), two water injection bottles (6) are arranged between the two support plates (10), four support rods (2) are independently arranged on the two support plates (10) in a rectangular distribution, four butterfly nuts (7) for limiting the position of the support plates (10) are threadedly connected on each support rod (2), and a limiting hole for limiting the displacement of the water injection bottle (6) is formed in the upper support plate (10), characterized in that: The inner ring (12) is provided with a limiting ring (8), the bottom of the limiting ring (8) is provided with a limiting groove for embedding the top of the inner ring (12), the inner wall of the outer ring (1) is provided with a plurality of fixed plates (3), the corresponding fixed plates (3) are provided with sliding grooves extending to the top of the fixed plates (3) on the inner wall of the fixed plates (3) and the outer wall of the limiting ring (8), the two sliding grooves are connected through a pressing plate (5), the both ends of the pressing plate (5) are provided with through grooves, the bottom of each sliding groove is provided with a limiting plate (9), the limiting plate (9) is provided with two elastic sheets (14) abutting against the pressing plate (5).

2. The dual ring infiltrometer for water injection test according to claim 1, characterized in that: The two support rods (2) distributed in front and back are connected through a bottom plate (13).

3. The dual ring infiltrometer for water injection test according to claim 1, characterized in that: The top of the pressing plate (5) is provided with a bubble level (4).

4. The dual ring infiltrometer for water injection test according to claim 3, characterized in that: The top of the pressing plate (5) is provided with a threaded hole, and a threaded rod (11) fixed at the bottom of the bubble level (4) is screw-connected in the threaded hole.

5. The dual ring infiltrometer for water injection test according to claim 1, characterized in that: The inner wall of the limiting groove of the limiting ring (8) is provided with an internal thread, and the outer side wall of the inner ring (12) is provided with an external thread in screw cooperation with the internal thread.

6. The dual ring infiltrometer for water injection test according to claim 1, characterized in that: A plurality of pressing plates (5) are distributed in a circumferential array along the axis of the outer ring (1).

7. The dual ring infiltrometer for water injection test according to claim 1, characterized in that: The side wall of the water injection bottle (6) is provided with a water outlet, and a faucet is installed at the water outlet.

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