Testing device for evaluating erosion damage of acid rain to roadbed filler

Abstract

The utility model discloses a test device for evaluating erosion damage of acid rain to roadbed filler. The test device comprises a liquid storage box, a test box and a collection box, the test box is arranged at the top of the collection box; a water pump is arranged on the liquid storage tank; a liquid inlet pipe is arranged at a water inlet of the water pump; the other end of the liquid inlet pipe extends into the liquid storage tank; a liquid outlet pipe is arranged at a water outlet of the water pump; a plurality of spraying pipes are arranged on the liquid outlet pipe; the other end of each spray pipe extends into the test box and is provided with a spray head; a sample holder is arranged in the test box; a sample is arranged on the sample holder; the sample is positioned below the nozzle; a first through hole is formed in the bottom of the test box; and a second through hole corresponding to the first through hole is formed in the collecting box. Acid liquor in the liquid storage tank is pumped out through the water pump and is sprayed out through the liquid outlet pipe, the spray pipe and the spray head in sequence to spray a sample on the sample holder, so that the effect of actually simulating acid rain washing is achieved, the test can be more practical, and the accuracy of a test result can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical engineering tests, in particular to a test device for evaluating the erosion and damage of acid rain on roadbed fillers. Background Art

[0002] Roadbed filler is a material used to fill the roadbed. It is required to be easy to dig, easy to compact, high in strength and good in water stability. Acid rain refers to rain, snow or other forms of precipitation with a pH value of less than 5.6. The erosion and damage of acid rain on roadbed fillers is an indispensable part of the quality inspection of roadbed fillers. However, the existing tests on acid rain erosion of roadbed fillers generally use the immersion method, which is different from the acid rain scouring effect in actual natural phenomena and cannot fit the actual situation well, resulting in insufficient accuracy of the test results.

[0003] Therefore, how to provide a test device for evaluating the erosion and damage of acid rain on roadbed fillers that can truly simulate the scouring effect of acid rain and improve the accuracy of test results is one of the technical problems that urgently need to be solved in this field. Utility Model Content

[0004] In view of this, the utility model provides a test device for evaluating the erosion and damage of roadbed fillers by acid rain, the purpose of which is to solve the problems existing in the prior art.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A test device for evaluating the erosion and damage of roadbed fillers by acid rain, comprising: a liquid storage tank, a test box and a collection box; the test box is arranged on the top of the collection box; a water pump is provided on the liquid storage tank; a liquid inlet pipe is provided at the water inlet of the water pump; the other end of the liquid inlet pipe extends into the liquid storage tank; a liquid outlet pipe is provided at the water outlet of the water pump; a plurality of spray pipes are provided on the liquid outlet pipe; the other end of each of the spray pipes extends into the test box and is provided with a nozzle; a sample rack is provided in the test box; a sample is provided on the sample rack; the sample is located below the nozzle; the number of the samples is the same as the nozzle, and they are arranged in a one-to-one correspondence; a first through hole is provided at the bottom of the test box; a second through hole is provided at the top of the collection box; the first through hole is the same as the second through hole, and they are arranged in a one-to-one correspondence.

[0007] Preferably, the collecting box is provided with a drain pipe; the drain pipe is provided with a valve.

[0008] Preferably, a blower and an electric heating tube are provided on both the left and right sides of the test box; the electric heating tube is arranged on the side of the corresponding blower close to the nozzle.

[0009] Shields are provided on the inner walls on both sides of the test box; a plurality of third through holes are opened on the side of the shield close to the nozzle; the blower and the electric heating pipe are both arranged in the corresponding shields.

[0010] Preferably, a placement seat is provided on the top of the sample rack; a placement slot for placing the sample is provided on the placement seat; the number of the placement seats is the same as the number of the nozzles, and they are arranged in a one-to-one correspondence.

[0011] Preferably, a fourth through hole is provided at the bottom of the placement groove; a fifth through hole is provided on the sample rack; the fourth through holes are the same in number as the fifth through holes and are arranged in a one-to-one correspondence.

[0012] Preferably, a plurality of columns are provided at the bottom of the placement groove; and the plurality of columns are evenly distributed around the fourth through hole.

[0013] Preferably, a liquid inlet is provided on the top of the liquid storage tank; a sealing cover is provided on the liquid inlet.

[0014] Compared with the prior art, the utility model has achieved the following technical effects: the utility model extracts the acid liquid in the liquid storage tank through a water pump and a liquid inlet pipe and sprays it out through a liquid outlet pipe, a spray pipe and a nozzle in sequence to spray the sample on the sample rack, thereby achieving the effect of truly simulating acid rain erosion, so that the test can be more in line with reality, and thus the accuracy of the test results can be improved. At the same time, by arranging a blower and an electric heating tube in the experimental box, the sample after being sprayed with acid can be dried in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a test device for evaluating the erosion and damage of roadbed fillers by acid rain according to the utility model;

[0016] Figure 2 for Figure 1 A partial enlarged view of part A;

[0017] In the figure: 1, liquid storage tank; 2, test box; 3, collection box; 4, water pump; 5, liquid inlet pipe; 6, liquid outlet pipe; 7, spray pipe; 8, nozzle; 9, sample rack; 10, sample; 11, first through hole; 12, second through hole; 13, drain pipe; 14, valve; 15, blower; 16, electric heating tube; 17, protective cover; 18, third through hole; 19, placement seat; 20, placement slot; 21, fourth through hole; 22, fifth through hole; 23, column; 24, liquid inlet; 25, sealing cover. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example

[0020] Reference Figure 1-2 As shown, the utility model discloses a test device for evaluating the erosion and damage of roadbed fillers by acid rain, comprising: a liquid storage tank 1, a test box 2 and a collecting box 3; the test box 2 is arranged on the top of the collecting box 3; the liquid storage tank 1 is arranged on the right side of the collecting box 3; the liquid storage tank 1 is filled with acid liquid; a water pump 4 is arranged on the liquid storage tank 1; a liquid inlet pipe 5 is arranged at the water inlet of the water pump 4; the other end of the liquid inlet pipe 5 extends into the liquid storage tank 1; a liquid outlet pipe 6 is arranged at the water outlet of the water pump 4; a plurality of spray pipes 7 are arranged on the liquid outlet pipe 6; the other end of each spray pipe 7 extends into the test box 2 and is provided with a nozzle 8; a sample rack 9 is arranged on the inner bottom wall of the test box 2; a plurality of samples 10 are arranged on the sample rack 9; the samples 10 are located below the nozzle 8; the number of the samples 10 is the same as that of the nozzle 8, and they are arranged one by one; the bottom of the test box 2 A plurality of first through holes 11 are provided; a plurality of second through holes 12 are provided on the top of the collecting box 3; the number of the first through holes 11 and the second through holes 12 are the same, and they are arranged one by one; before use, acid is filled into the liquid storage tank 1, and the sample 10 made of roadbed filler is placed on the sample rack 9; when in use, the water pump 4 is started, and the water pump 4 extracts the acid in the liquid storage tank 1 through the liquid inlet pipe 5 and pumps it to the liquid outlet pipe 6; the acid in the liquid outlet pipe 6 is sprayed out through the spray pipe 7 and the nozzle 8 in turn, and the sample 10 on the sample rack 9 is corroded and scoured, thereby achieving the effect of truly simulating acid rain scour, so that the test can be more in line with reality, and then the accuracy of the test results can be improved. In this process, the acid in the test box 2 flows into the collecting box 3 through the first through hole 11 and the second through hole 12 in turn.

[0021] In this embodiment, a drain pipe 13 is provided at the lower left side of the collecting box 3; the drain pipe 13 is connected to the inside of the collecting box 3; a valve 14 is provided on the drain pipe 13; when in use, the acid in the collecting box 3 is discharged through the drain pipe 13 by opening the valve 14.

[0022] In this embodiment, shields 17 are provided on the inner walls on both sides of the test box 2; each shield 17 is provided with a plurality of blowers 15 and a plurality of electric heating tubes 16; the blowers 15 and the electric heating tubes 16 are fixedly connected to the inner wall of the test box 2; the electric heating tubes 16 are arranged on the side of the corresponding blower 15 close to the nozzle 8; each shield 17 is provided with a plurality of third through holes 18 on the side close to the nozzle 8; when the acid spraying is completed, the water pump 4 is turned off, the blower 15 and the electric heating tube 16 are turned on, the electric heating tube 16 heats the air, and the blower 15 blows the hot air through the third through holes 18 on the shield 17 to the inside of the test box 2 to dry the sample 10.

[0023] In this embodiment, a plurality of placement seats 19 are provided on the top of the sample rack 9; each placement seat 19 is provided with a placement slot 20 for placing the sample 10; the number of the placement seats 19 is the same as the number of the nozzles 8, and they are arranged one by one; when in use, the sample 10 can be placed in the placement slot 20 on the corresponding placement seat 19. By providing the placement seats 19 and the placement slots 20, it is convenient to take and place the sample 10.

[0024] In this embodiment, a fourth through hole 21 is provided in the middle of the bottom of each placement slot 20; a plurality of fifth through holes 22 are provided on the sample rack 9; the number of the fourth through holes 21 and the fifth through holes 22 are the same, and they are provided in a one-to-one correspondence; by providing the fourth through holes 21 and the fifth through holes 22, the acid liquid flowing into the placement slot 20 can be discharged from the placement slot 20 in time.

[0025] In this embodiment, a plurality of columns 23 are provided at the bottom of each placement slot 20; the plurality of columns 23 are evenly distributed around the fourth through hole 21; the sample 10 is supported by the columns 23 so that a certain gap is left between the sample 10 and the bottom of the placement slot 20 to facilitate the acid to be discharged from the placement slot 20.

[0026] In this embodiment, a liquid inlet 24 is provided on the top of the liquid storage tank 1 to facilitate adding acid liquid into the liquid storage tank 1 ; a sealing cover 25 is provided on the liquid inlet 24 .

[0027] In this embodiment, the outer surfaces of the blower 15 , the electric heating tube 16 and the protective cover 17 are coated with anti-corrosion materials to prevent the blower 15 , the electric heating tube 16 and the protective cover 17 from being corroded by acid.

[0028] In this embodiment, a sixth through hole is provided at the bottom of each protective cover 17, so that the acid liquid entering the protective cover can be discharged.

[0029] Test process: 1) Make the roadbed filler into sample 10; 2) Determine the mass and moisture content of sample 10; 3) Place sample 10 on sample rack 9 in test box 2; 4) Fill the prepared acid solution into liquid storage tank 1; 5) Start water pump 4 to spray acid solution on sample 10; 6) After the acid solution spraying is completed, start blower 15 and electric heating tube 16 to perform drying test on sample 10; 7) Determine the mass of sample 10 after drying and calculate the mass loss rate.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A test device for evaluating the erosion and damage of roadbed fillers by acid rain, characterized in that: include: A liquid storage tank (1), a test tank (2) and a collection tank (3); the test tank (2) is arranged on the top of the collection tank (3); a water pump (4) is arranged on the liquid storage tank (1); a liquid inlet pipe (5) is arranged at the water inlet of the water pump (4); the other end of the liquid inlet pipe (5) extends into the liquid storage tank (1); a liquid outlet pipe (6) is arranged at the water outlet of the water pump (4); a plurality of spray pipes (7) are arranged on the liquid outlet pipe (6); the other end of each spray pipe (7) extends into the test tank (2) A nozzle (8) is provided; a sample rack (9) is provided in the test box (2); a sample (10) is provided on the sample rack (9); the sample (10) is located below the nozzle (8); the number of the samples (10) is the same as the number of the nozzles (8), and they are arranged in a one-to-one correspondence; a first through hole (11) is provided at the bottom of the test box (2); a second through hole (12) is provided at the top of the collection box (3); the number of the first through hole (11) and the second through hole (12) is the same, and they are arranged in a one-to-one correspondence; A blower (15) and an electric heating pipe (16) are provided on both the left and right sides of the test box (2); the electric heating pipe (16) is arranged on the side of the corresponding blower (15) close to the nozzle (8); The left and right inner walls of the test box (2) are both provided with shields (17); a plurality of third through holes (18) are provided on a side of the shield (17) close to the nozzle (8); and the blower (15) and the electric heating pipe (16) are both arranged in the corresponding shields (17).

2. A test device for evaluating the erosion and damage of roadbed fillers by acid rain according to claim 1, characterized in that: The collecting box (3) is provided with a drainage pipe (13); the drainage pipe (13) is provided with a valve (14).

3. A test device for evaluating the erosion and damage of roadbed fillers by acid rain according to claim 1, characterized in that: A placement seat (19) is provided on the top of the sample rack (9); a placement slot (20) for placing the sample (10) is provided on the placement seat (19); the number of the placement seats (19) is the same as the number of the nozzles (8), and they are arranged in a one-to-one correspondence.

4. A test device for evaluating the erosion and damage of roadbed fillers by acid rain according to claim 3, characterized in that: A fourth through hole (21) is provided at the bottom of the placement slot (20); a fifth through hole (22) is provided on the sample rack (9); the fourth through holes (21) and the fifth through holes (22) are the same in number and are arranged in a one-to-one correspondence.

5. A test device for evaluating the erosion and damage of roadbed fillers by acid rain according to claim 4, characterized in that: A plurality of columns (23) are provided at the bottom of the placement groove (20); the plurality of columns (23) are evenly distributed around the fourth through hole (21).

6. A test device for evaluating the erosion and damage of roadbed fillers by acid rain according to claim 1, characterized in that: The top of the liquid storage box (1) is provided with a liquid inlet (24); the liquid inlet (24) is provided with a sealing cover (25).

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