Device and method for testing performance of high polymer grouting sample

Abstract

The invention relates to the technical field of high polymer grouting material testing, and particularly discloses a high polymer grouting sample performance testing device and method.The high polymer grouting sample performance testing device comprises a base, the top of the base is fixedly connected with a work box and a test bed, and a waste water box, a clear water box and a bacterial liquid box are fixedly installed in the work box from bottom to top; a plurality of charging barrels are embedded and mounted at the top of the working box for placing samples, heaters are fixedly mounted outside the charging barrels, a central column is arranged at the top of the working box in a sliding manner, a transverse bracket is fixedly connected to the upper end of the central column, and a plurality of upper cover barrels are fixedly connected to the branch tail ends of the transverse bracket; and by arranging the bacterium spraying mechanism and the spraying mechanism, a soaking test and a bacterium liquid test can be provided, more test environments are increased, more test data can be obtained, and the reliability of the obtained test result is higher.

Description

Technical Field

[0001] The invention relates to the technical field of polymer grouting material testing, and more specifically to a device and method for testing the performance of a polymer grouting sample. Background Art

[0002] Polymer grouting samples are usually made of high molecular polymer as the main component through scientific proportioning and specific processes. For example, a rigid polyurethane grouting sample is a typical polymer grouting sample, which is made of raw materials such as polyisocyanate and polyether polyol or polyester polyol. In addition, some polymer composite grouting samples may also contain a variety of raw materials such as Wenlun glue, polyether polyol, epoxy soybean oil, chain extender, catalyst, foaming agent, defoamer, isocyanate, ordinary Portland cement, solid waste (such as fly ash, bottom slag or carbide slag) and water.

[0003] Patent No. CN109738355A discloses a device for testing the corrosion resistance of polymer grouting samples, wherein a rotating assembly driven by a motor is placed in the test box, and holes for placing samples are evenly arranged on the rotating disk; a control module is arranged on one side of the test box, and the temperature display panel, humidity display panel, temperature controller, humidity controller and main switch are electrically connected to the MCU respectively; a corrosion assembly is also arranged on one side of the test box, and the mold spray module and humidification module are distributed on both sides of the heating module. The device of the present application can well simulate the humid, hot and multi-bacterial environment of the foundation, and can also set different temperatures, humidity and molds according to different needs, so as to more realistically simulate the environment of a specific area; at the same time, the present method can quickly determine the corrosion resistance coefficient and make a performance evaluation, thereby facilitating the construction unit to screen out polymer grouting samples suitable for the local area.

[0004] Most of the existing tests study the anti-permeability performance of polymer grouting samples. Generally, the samples are placed in water for immersion test or spray test to obtain the anti-permeability performance. However, the test space is relatively single, and multiple samples are prone to interfere with and affect each other. The test results obtained are not reliable and representative enough, and a large number of tests are required to obtain accurate data. Therefore, this scheme proposes a performance testing device and method for polymer grouting samples. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a device and method for testing the performance of polymer grouting samples to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solutions: a device and method for testing the performance of polymer grouting samples, wherein a working box and a test bench are fixedly connected to the top of the base, a wastewater tank, a clean water tank and a bacterial liquid tank are fixedly installed in the working box from bottom to top, a plurality of barrels are embedded and installed on the top of the working box for placing samples, a heater is fixedly installed on the outside of the barrel, a central column is slidably arranged on the top of the working box, a cross bracket is fixedly connected to the upper end of the central column, a plurality of upper cover barrels are fixedly connected to the branch ends of the cross bracket, a bacteria spraying mechanism and a spraying mechanism are arranged on the working box, the bacteria spraying mechanism extracts bacterial liquid and then sprays it into a plurality of barrels respectively, the spraying mechanism extracts clean water and then sprays it into a plurality of barrels respectively, a lifting mechanism is arranged on the working box, the lifting mechanism lifts the central column to close the upper cover barrel and the barrel to form a plurality of chambers to assist the bacteria spraying mechanism and the spraying mechanism in testing, and provide testing spaces that do not affect each other, and a pressure tester is installed on the test bench; The spraying mechanism includes an atomizer, a second diverter ring, a third hose, a second liquid pump and a plurality of fourth hoses. The atomizers are arranged in plurality and are respectively fixedly installed in different upper cover tubes. The second liquid pump is fixedly connected in the bacteria liquid tank. The second diverter ring is fixedly installed at the center of the cross bracket. The third hose is fixedly connected between the second liquid pump and the second diverter ring. A plurality of the fourth hoses are respectively fixedly connected between different atomizers and the outlet of the second diverter ring. A fourth valve is installed at each outlet of the second diverter ring.

[0007] Furthermore, the spray mechanism includes a sprayer, a first diverter ring, a first hose, a first liquid pump and a plurality of second hoses. The sprayers are arranged in plurality and are respectively fixedly installed in different upper cover tubes. The first liquid pump is fixedly connected in the clean water tank. The first diverter ring is fixedly installed at the center of the cross bracket. The first hose is fixedly connected between the first liquid pump and the first diverter ring. A plurality of the second hoses are respectively fixedly connected between different sprayers and the outlet of the first diverter ring. A third valve is installed at each outlet of the first diverter ring.

[0008] Furthermore, a tray is fixedly connected to the inside of the barrel, and a plurality of material troughs are fixedly connected to the upper side of the tray. The diameter of the material troughs is 3-10 cm, and the material troughs are evenly distributed in the barrel.

[0009] Furthermore, the bottom outlet of each barrel is fixedly connected to a three-way pipe, one end of the three-way pipe is fixedly connected to the wastewater tank and is installed with a first valve, and a plurality of reflux ports are arranged on the top of the bacteria liquid tank, and the other end of the three-way pipe is fixedly connected to the reflux port and is installed with a second valve.

[0010] Furthermore, the lifting mechanism includes a servo motor, a protective frame, a ball screw and a screw sleeve, the servo motor is fixedly connected to the top of the working box, the protective frame is fixedly connected to the upper inner wall of the working box, the ball screw is rotatably connected in the protective frame, the output end of the servo motor is fixedly connected to the ball screw, the screw sleeve is fixedly connected to the lower end of the center column, and the screw sleeve is threadedly connected to the circumferential surface of the ball screw.

[0011] Furthermore, a protection frame is fixedly connected to the top of the test bench, and the pressure tester is located in the protection frame.

[0012] Furthermore, a top cover is fixedly connected to the top of the transverse support, and the transverse support and a plurality of upper cover cylinders are all located inside the top cover.

[0013] Furthermore, a temperature and humidity sensor is installed inside each of the barrels, a controller is provided outside the working box, and several of the temperature and humidity sensors are electrically connected to the controller.

[0014] A performance testing method for a polymer grouting specimen comprises the following steps: S1. Sample selection: select a number of polymer grouting materials as samples, determine that each group is at least three, and select the first group to be placed in the working area of ​​the pressure tester. Use the pressure tester to test the compressive strength of each sample, and record the average value as A1. The remaining groups of samples are placed in the material troughs of different barrels, and then control the output end of the servo motor to drive the ball screw to rotate. The ball screw drives the screw sleeve to move downward. At this time, the central column, the cross bracket and several upper cover barrels follow and move downward, so that the several upper cover barrels are closed with the corresponding barrels, providing a test environment in which the samples do not affect each other; S2, immersion test: the first liquid pump is used to pump clean water into the first hose and into the first diversion ring, and the third valves are opened, and the clean water flows through the second hose and into the corresponding sprayer, and finally sprays into the corresponding barrels through the sprayer, so that the groups of samples are immersed in the clean water; S3, Bacteria spray test: The bacterial liquid is pumped into the third hose and into the second diverter ring through the second liquid pump, and the fourth valves are opened, and the bacterial liquid flows through the fourth hose and into the corresponding atomizer, and finally atomized by the sprayer and enters the corresponding barrels, and the atomized liquid is evenly diffused in the barrel and surrounded by the sample, and the corresponding second valve is opened, and the bacterial liquid flows back into the bacterial liquid tank, and the second liquid pump is controlled to work continuously, and the sample is subjected to a continuous bacterial liquid spray test; S4, temperature test: start several heaters to heat the barrel, so that the temperature inside the barrel is 50-200 degrees Celsius, and take 10-30 degrees Celsius as the step interval, and select different temperature tests for samples in different areas; S5, performance test: after testing the sample for 72 hours, control the output end of the servo motor to rotate in the opposite direction to return the upper cover tube to its original position, then take out several samples, and put each group of samples into the pressure tester in turn, test the compressive strength of the samples by the pressure tester, record the average value of the compressive strength data of each group of samples, divide the sample data of S2 into group B, and the sample data of S4 into group C; S5-1, cleaning: after taking out the sample, control the upper cover tube to close with the barrel downward again, then open a plurality of first valves, and close the second valve opened in step S3, then start each first liquid pump again, so that clean water is sprayed into each barrel from the sprayer, so as to clean the barrel, and the waste water enters the waste water tank through the three-way pipe to collect the waste water centrally; S6. Define strength: Compare the compressive strength of groups B and C with A1 and calculate the corrosion resistance coefficient to evaluate their corrosion resistance.

[0015] Technical effects and advantages of the present invention: 2. The present invention is provided with a bacteria spraying mechanism and a spraying mechanism, which is conducive to providing immersion test and bacteria liquid test, adding more test environments, and then obtaining more test data, so that the obtained test results are more reliable, reduce errors, and are more representative. Several barrels can carry out multiple groups of different tests at the same time, and the multiple groups of tests do not affect each other. By testing multiple groups of samples, a wider range of experimental conditions can be covered, making the results more representative, which helps to more accurately reflect the actual situation and avoid the deviation that may be caused by a single sample.

[0016] 3. The present invention is conducive to controlling the test temperature of each sample by providing a heater for controlling the test environment temperature. Temperature change is an important factor affecting the stability of the sample. The stability of the sample at different temperatures, including thermal stability, chemical stability and mechanical stability, can be evaluated, thereby predicting the performance of the sample in practical applications. The atomized bacterial liquid can simulate the presence of microorganisms in the actual environment, thereby more truly reflecting the performance of the polymer grouting material in practical applications, helping to evaluate the durability and stability of the sample under the action of microorganisms, and can evaluate the resistance of the polymer grouting sample to microbial erosion, helping to ensure the long-term performance of the sample, and can more comprehensively consider the influence of microorganisms on the performance of the polymer grouting material, thereby improving the accuracy and reliability of the test.

[0017] 4. The present invention is provided with a three-way pipe to connect the wastewater tank and the bacterial liquid tank, which is conducive to collecting the wastewater generated by the test and cleaning in the barrel in the wastewater tank, and the bacterial liquid in the barrel can be returned to the bacterial liquid tank through the three-way pipe, so as to reduce resource waste by recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the working box structure of the present invention; Figure 4 It is a schematic diagram of the water tank structure of the present invention; Figure 5 is a cross-sectional view of a water tank of the present invention; Figure 6 It is a schematic diagram of the structure of the diverter ring of the present invention; Figure 7 It is a schematic diagram of the three-way pipe structure of the present invention; Figure 8 It is a schematic diagram of the barrel structure of the present invention; Fig. 9 It is a schematic diagram of the lifting mechanism of the present invention.

[0019] The reference numerals are: 1, base; 2, working box; 3, top cover; 4, waste water tank; 5, clean water tank; 6, bacterial liquid tank; 601, reflux port; 7, barrel; 701, tray; 702, trough; 8, center column; 801, horizontal bracket; 9, upper cover barrel; 10, three-way pipe; 1001, first valve; 1002, second valve; 11, sprinkler; 1101, first diverter ring; 1102, first hose; 1103, first liquid pump; 1104, third valve; 1105, second hose; 12, atomizer; 1201, second diverter ring; 1202, third hose; 1203, second liquid pump; 1204, fourth valve; 1205, fourth hose; 13, heater; 14, servo motor; 1401, protection frame; 1402, ball screw; 1403, screw sleeve; 15, pressure tester; 16, controller; 17, test bench; 1701, protection frame. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are only examples. The device and method for testing the performance of polymer grouting specimens involved in the present invention are not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0021] Reference Figure 1-Figure 9The present invention provides a device and method for testing the performance of polymer grouting samples, comprising a base 1, a working box 2 and a test bench 17 are fixedly connected to the top of the base 1, a waste water tank 4, a clean water tank 5 and a bacterial liquid tank 6 are fixedly installed from bottom to top in the working box 2, a plurality of barrels 7 are embedded and installed on the top of the working box 2 for placing samples, a heater 13 is fixedly installed on the outside of the barrel 7, a central column 8 is slidably provided on the top of the working box 2, a cross bracket 801 is fixedly connected to the upper end of the central column 8, and the cross bracket 801 is fixedly provided on the upper end of the central column 8. Several upper cover cylinders 9 are fixedly connected to the branch ends, and a spraying mechanism and a shower mechanism are provided on the working box 2. The spraying mechanism extracts bacterial liquid and then sprays it into several barrels 7 respectively, and the shower mechanism extracts clean water and then sprays it into several barrels 7 respectively. A lifting mechanism is provided on the working box 2, and the lifting mechanism lifts and lowers the central column 8 to close the upper cover cylinder 9 and the barrel 7 to form several chambers to assist the spraying mechanism and the shower mechanism in testing, and provide testing spaces that do not affect each other. A pressure tester 15 is installed on the test bench 17.

[0022] The spraying mechanism includes an atomizer 12, a second diverter ring 1201, a third hose 1202, a second liquid pump 1203 and a plurality of fourth hoses 1205. A plurality of atomizers 12 are provided and are respectively fixedly installed in different upper cover tubes 9. The second liquid pump 1203 is fixedly connected to the bacteria liquid tank 6. The second diverter ring 1201 is fixedly installed at the center of the cross bracket 801. The third hose 1202 is fixedly connected between the second liquid pump 1203 and the second diverter ring 1201. A plurality of fourth hoses 1205 are respectively fixedly connected between different atomizers 12 and the outlet of the second diverter ring 1201. A fourth valve 1204 is installed at each outlet of the second diverter ring 1201.

[0023] In this embodiment, it is necessary to specifically explain that: the waste water tank 4 is used to collect waste water, the clean water tank 5 is used to store clean water, the bacterial liquid tank 6 is used to store bacterial liquid, a plurality of upper cover tubes 9 correspond to the barrel 7 one by one, and the lifting mechanism is used to synchronously lift the height of the plurality of upper cover tubes 9 so that the upper cover tubes 9 and the barrel 7 are closed or separated, a sprayer 11 and an atomizer 12 are installed in each upper cover tube 9, the barrel 7 is used to place a sample of a polymer grouting sample, a heater 13 is used to control the temperature of the barrel 7, and a plurality of barrels 7 are designed to carry out multiple groups of experiments at the same time, the sprayer 11 is connected to the clean water tank 5 to spray clean water on the barrel 7, and when in use, the clean water is pumped into the first hose 1102 by the first liquid pump 1103, and then flows through the first diverter ring 1101 and the second hose 1105 into the sprayer 11, and finally by the sprayer 1 1 is sprayed into the barrel 7 for immersion test, the atomizer 12 is connected to the bacterial liquid box 6 for spraying the bacterial liquid into the barrel 7, and when in use, the bacterial liquid is pumped into the third hose 1202 by the second liquid pump 1203, and then flows through the third hose 1202 and the fourth hose 1205 into the atomizer 12, and finally atomized by the atomizer 12 and sprayed into the barrel 7 for mold test, after the test is completed, the sample is taken out, and the sample is tested by the pressure tester 15, and the performance of the sample is calculated according to the compressive strength data of the sample, so that the water immersion and bacterial liquid spray test can be carried out at the same time, and different conditions, such as time, temperature, etc., can be selected for testing, which adds more test environments and then obtains more test data, so that the obtained test results are more reliable, reduce errors, and are more representative.

[0024] The main difference between the present embodiment and the prior art is that in the present embodiment, multiple barrels 7 are used to simultaneously perform tests under different conditions. Specifically, the upper cover barrel 9 can be driven to move downward by the lifting mechanism to close the upper cover barrel 9 and the barrel 7. The sample is located in the barrel 7. After the upper cover barrel 9 is closed, a separate test space for the sample can be provided. Several barrels 7 can be designed to perform multiple groups of different tests at the same time, and the multiple groups of tests do not affect each other. By testing multiple groups of samples, a wider range of experimental conditions can be covered, making the results more representative, which helps to more accurately reflect the actual situation and avoid the deviation that may be caused by a single sample. In addition, a heater 13 is installed on the outside of each barrel 7 to control the test temperature of each sample. Temperature change is an important factor affecting the stability of the sample. The stability of the sample at different temperatures can be evaluated, including thermal stability. , chemical stability and mechanical stability, so as to predict the performance of the sample in actual application. The atomized bacterial liquid can simulate the existence of microorganisms in the actual environment, so as to more truly reflect the performance of the polymer grouting material in actual application, and help to evaluate the durability and stability of the sample under the action of microorganisms. It can evaluate the resistance of the polymer grouting sample to microbial erosion, which helps to ensure the long-term performance of the sample. It can more comprehensively consider the influence of microorganisms on the performance of the polymer grouting material, so as to improve the accuracy and reliability of the test. By designing a step-by-step temperature range on different barrels 7, the specific performance of the sample at different temperatures can be obtained more accurately, more comprehensive data can be collected, the reliability and accuracy of the experimental results can be improved, and it helps to reduce the deviation and uncertainty that may occur under a single test condition.

[0025] The above structure is the main structure of this embodiment, which solves the problem of insufficient reliability of results due to a single test environment. The sprayer 11 and the atomizer 12 are existing structures. The specific structure and connection method of how the atomizer 12 atomizes the bacterial liquid are not described in detail in this embodiment. In addition, the heating function of the heater 13 also belongs to the prior art. Therefore, this application does not make detailed limitations.

[0026] Reference Figure 5 and Figure 6 The spray mechanism includes a sprayer 11, a first diverter ring 1101, a first hose 1102, a first liquid pump 1103 and a plurality of second hoses 1105. A plurality of sprayers 11 are arranged and are respectively fixedly installed in different upper cover tubes 9. The first liquid pump 1103 is fixedly connected in the clean water tank 5. The first diverter ring 1101 is fixedly installed at the center of the cross bracket 801. The first hose 1102 is fixedly connected between the first liquid pump 1103 and the first diverter ring 1101. A plurality of second hoses 1105 are respectively fixedly connected between different sprayers 11 and the outlet of the first diverter ring 1101. A third valve 1104 is installed at the outlet of each first diverter ring 1101.

[0027] In this embodiment, it is necessary to specifically explain that: a sprayer 11 is installed in each upper cover tube 9, and the sprayer 11 has a spraying function. The first liquid pump 1103 is installed in the bacterial liquid box 6. When working, the clean water is pumped into the first hose 1102 through the first liquid pump 1103, and then enters the first diverter ring 1101. The first diverter ring 1101 plays a diverting role. When the third valve 1104 is fully opened, the clean water can enter the sprayer 11 through the second hose 1105, and finally sprayed into the barrel 7 by the sprayer 11. The clean water is retained in the barrel 7, and the sample can be immersed in the barrel 7 to conduct an immersion experiment to evaluate the impermeability, polymer grouting material The bubbles inside form a closed structure, making it difficult for water to penetrate into the material. Through immersion experiments, the material's impermeability can be evaluated and its effectiveness in preventing water penetration in practical applications can be verified. This is especially important for engineering fields that require waterproofing and moisture-proofing, such as foundation reinforcement and tunnel lining repair. Similarly, the experiment can adjust the density of the polymer grouting material to observe and analyze changes in water absorption. In some application scenarios, the polymer grouting material may be in contact with water for a long time. Through clean water immersion experiments, this use environment can be simulated to evaluate the performance changes of the material under long-term immersion, such as whether it will expand, soften or lose strength.

[0028] Reference Figure 8 A tray 701 is fixedly connected to the inside of the barrel 7 , and a plurality of material troughs 702 are fixedly connected to the upper side of the tray 701 . The diameter of the material troughs 702 is 3-10 cm, and the material troughs 702 are evenly distributed in the barrel 7 .

[0029] In this embodiment, it is necessary to specifically explain that: the tray 701 has a hollow structure, which is conducive to the outflow of clean water and bacterial liquid while supporting the sample, and a plurality of material troughs 702 are designed. When testing, samples of suitable shapes, such as cylindrical shapes, can be made according to the diameter of the material troughs 702 and evenly placed in the material troughs 702. When conducting the experiment, they can be evenly soaked and sprayed, and after being taken out later, they are easy to clean to prevent residue.

[0030] Reference Figure 4 and 7 The bottom outlet of each barrel 7 is fixedly connected to a three-way pipe 10, one end of the three-way pipe 10 is fixedly connected to the wastewater tank 4 and is installed with a first valve 1001, and a plurality of reflux ports 601 are arranged on the top of the bacteria liquid tank 6, and the other end of the three-way pipe 10 is fixedly connected to the reflux port 601 and is installed with a second valve 1002.

[0031] In this embodiment, it should be specifically explained that: in the initial state, the first valve 1001 and the second valve 1002 are both in the closed state. After the first valve 1001 is opened, the liquid in the barrel 7 flows into the waste water tank 4 through the three-way pipe 10, which is used to flow out the clean water after the experiment and the waste water after washing. After the second valve 1002 is opened, the liquid in the barrel 7 flows into the bacterial liquid tank 6 through the three-way pipe 10, which is used for the bacterial liquid during the reflux test, and is recycled to reduce resource waste.

[0032] Reference Fig. 9 The lifting mechanism includes a servo motor 14, a protective frame 1401, a ball screw 1402 and a screw sleeve 1403. The servo motor 14 is fixedly connected to the top of the working box 2, the protective frame 1401 is fixedly connected to the upper inner wall of the working box 2, the ball screw 1402 is rotatably connected to the protective frame 1401, the output end of the servo motor 14 is fixedly connected to the ball screw 1402, the screw sleeve 1403 is fixedly connected to the lower end of the center column 8, and the screw sleeve 1403 is threadedly connected to the circumferential surface of the ball screw 1402.

[0033] In this embodiment, it is necessary to specifically explain that: the protection frame 1401 is used to support the rotation of the ball screw 1402. When working, the ball screw 1402 is removed from the output end of the servo motor 14 to rotate, and the ball screw 1402 drives the screw sleeve 1403 to rise and fall, and the screw sleeve 1403 drives the center column 8 to rise and fall, and the center column 8 drives the cross bracket 801 to rise and fall, and finally drives several upper cover cylinders 9 to rise and fall synchronously. The upper cover cylinder 9 moves downward and can be closed with the barrel 7, providing a testing environment for the sample, and several groups of samples do not affect each other.

[0034] Reference Figure 2 A protection frame 1701 is fixedly connected to the top of the test bench 17 , and the pressure tester 15 is located in the protection frame 1701 .

[0035] In this embodiment, it should be specifically explained that the protection frame 1701 is located at the edge of the test bench 17, which can block the broken pieces when the pressure tester 15 tests the polymer grouting material, and prevent people from accidentally entering the dangerous area under the slider without understanding the operating status of the equipment, thereby avoiding personal injury accidents and protecting the lives of the staff.

[0036] Reference Figure 2 and Figure 3 The top of the cross bracket 801 is fixedly connected to the top cover 3 , and the cross bracket 801 and a plurality of upper cover tubes 9 are all located inside the top cover 3 .

[0037] In this embodiment, it should be specifically explained that: the top cover 3 is designed on the upper side of several upper cover tubes 9. After the upper cover tubes 9 and the barrel 7 are closed, the top cover 3 and the top of the working box 2 are closed to prevent accidents caused by excessive temperature and play a protective role.

[0038] Reference Figure 7 A temperature and humidity sensor is installed inside each barrel 7 , a controller 16 is arranged outside the working box 2 , and a plurality of temperature and humidity sensors are connected to the controller 16 in a telecommunication manner.

[0039] In this embodiment, it should be specifically explained that: the controller 16 is used to control the electronic equipment on the working box 2, such as the servo motor 14, the heater 13, the first liquid pump 1103 and the second liquid pump 1203, etc. The temperature and humidity sensor is used to monitor the temperature and humidity in the barrel 7 in real time, and display it through the controller 16 to ensure that the test environment is in a stable state.

[0040] The main problem solved by this embodiment is: using a plurality of barrels 7 to perform immersion tests and bacterial liquid tests, more test environments are added, and the problem of the relatively single test environment of traditional polymer grouting samples is solved. The temperature of the test environment is controlled by the heater 13, and the stability of the sample at different temperatures can be evaluated. The test results obtained are more accurate and reliable, and the problem of inaccurate durability and corrosion resistance tests of polymer grouting samples is solved.

[0041] The specific steps are as follows: A performance testing method for polymer grouting specimens, characterized in that it comprises the following steps: S1. Sample selection: select a number of polymer grouting materials as samples, determine that each group is at least three, and select the first group to be placed in the working area of ​​the pressure tester 15, test the compressive strength of each sample by the pressure tester 15, and record the average value as A1, and each group of other samples is placed in the material slot 702 of a different barrel 7, and then control the output end of the servo motor 14 to drive the ball screw 1402 to rotate, and the ball screw 1402 drives the screw sleeve 1403 to move downward, at this time, the central column 8, the cross bracket 801 and the plurality of upper cover cylinders 9 follow and move downward, so that the plurality of upper cover cylinders 9 are closed with the corresponding barrel 7, providing a test environment in which the samples do not affect each other; S2, immersion test: clean water is pumped into the first hose 1102 and into the first diverter ring 1101 through the first liquid pump 1103, and the third valves 1104 are opened, and the clean water flows through the second hose 1105 and into the corresponding sprayer 11, and finally sprayed into the corresponding barrels 7 through the sprayer 11, so that the groups of samples are immersed in the clean water; S3, spray test: The bacterial liquid is pumped into the third hose 1202 and into the second diverter ring 1201 by the second liquid pump 1203, and the fourth valves 1204 are opened, and the bacterial liquid flows through the fourth hose 1205 and into the corresponding atomizer 12, and finally atomized by the sprayer 11 and enters the corresponding barrels 7, and the atomized liquid is evenly diffused in the barrel 7 and surrounds the sample, and the corresponding second valve 1002 is opened, and the bacterial liquid flows back into the bacterial liquid tank 6, and the second liquid pump 1203 is controlled to work continuously, and a continuous bacterial liquid spray test is performed on the sample; S4, temperature experiment: start a plurality of heaters 13 to heat the barrel 7, so that the temperature inside the barrel 7 is 50-200 degrees Celsius, and take 10-30 degrees Celsius as a step interval, and select different temperature experiments for samples in different areas; S5, performance test: after testing the sample for 72 hours, the output end of the servo motor 14 is controlled to rotate in the opposite direction to return the upper cover tube 9 to its original position, and then several samples are taken out, and each group of samples is sequentially placed in the pressure tester 15, and the compressive strength of the samples is tested by the pressure tester 15, and the average value of the compressive strength data of each group of samples is recorded, and the sample data of S2 is divided into group B, and the sample data of S4 is divided into group C; S5-1, cleaning: after taking out the sample, control the upper cover cylinder 9 to close the barrel 7 downward again, then open the first valves 1001, and close the second valves 1002 opened in step S3, then start each first liquid pump 1103 again, so that clean water is sprayed into each barrel 7 from the sprayer 11, so as to clean the barrel 7, and the waste water enters the waste water tank 4 through the three-way pipe 10 to collect the waste water; S6. Define strength: Compare the compressive strength of groups B and C with A1 and calculate the corrosion resistance coefficient to evaluate their corrosion resistance.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for testing the performance of polymer grouting samples, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a working box (2) and a test bench (17); a waste water tank (4), a clean water tank (5) and a bacterial liquid tank (6) are fixedly installed in the working box (2) from bottom to top; a plurality of barrels (7) are embedded and installed on the top of the working box (2) for placing samples; a heater (13) is fixedly installed on the outside of the barrel (7); a central column (8) is slidably provided on the top of the working box (2); a transverse bracket (801) is fixedly connected to the upper end of the central column (8); and a plurality of branch ends of the transverse bracket (801) are fixedly connected to the ends of the branches. The upper cover cylinder (9) is provided with a spraying mechanism and a showering mechanism on the working box (2), the spraying mechanism extracts bacterial liquid and then sprays it into a plurality of barrels (7), the showering mechanism extracts clean water and then sprays it into a plurality of barrels (7), the working box (2) is provided with a lifting mechanism, the lifting mechanism lifts and lowers the central column (8) to close the upper cover cylinder (9) and the barrel (7), so as to form a plurality of chambers to assist the spraying mechanism and the showering mechanism in testing, and provide testing spaces that do not affect each other, and the test bench (17) is installed with a pressure tester (15); The spraying mechanism comprises an atomizer (12), a second diverter ring (1201), a third hose (1202), a second liquid pump (1203) and a plurality of fourth hoses (1205). The atomizer (12) is provided in plurality and fixedly installed in different upper cover tubes (9), the second liquid pump (1203) is fixedly connected in a bacterial liquid tank (6), the second diverter ring (1201) is fixedly installed at the center of a horizontal support (801), the third hose (1202) is fixedly connected between the second liquid pump (1203) and the second diverter ring (1201), and the plurality of fourth hoses (1205) are fixedly connected between different atomizers (12) and the outlet of the second diverter ring (1201), and each outlet of the second diverter ring (1201) is installed with a fourth valve (1204).

2. The polymer grouting sample performance testing device according to claim 1, characterized in that: The spray mechanism comprises a sprayer (11), a first diverter ring (1101), a first hose (1102), a first liquid pump (1103) and a plurality of second hoses (1105); the sprayer (11) is provided with a plurality of nozzles and fixedly installed in different upper cover tubes (9); the first liquid pump (1103) is fixedly connected in a clean water tank (5); the first diverter ring (1101) is fixedly installed at the center of a horizontal bracket (801); the first hose (1102) is fixedly connected between the first liquid pump (1103) and the first diverter ring (1101); the plurality of second hoses (1105) are fixedly connected between different sprayers (11) and the outlet of the first diverter ring (1101); and a third valve (1104) is installed at the outlet of each first diverter ring (1101).

3. A polymer grouting sample performance testing device according to claim 2, characterized in that: A tray (701) is fixedly connected inside the barrel (7), and a plurality of material troughs (702) are fixedly connected to the upper side of the tray (701). The diameter of the material troughs (702) is 3-10 centimeters, and the material troughs (702) are evenly distributed inside the barrel (7).

4. The device for testing the performance of polymer grouting samples according to claim 3, characterized in that: The bottom outlet of each barrel (7) is fixedly connected to a three-way pipe (10), one end of the three-way pipe (10) is fixedly connected to the wastewater tank (4) and is installed with a first valve (1001), and the top of the bacterial liquid tank (6) is provided with a plurality of reflux ports (601), and the other end of the three-way pipe (10) is fixedly connected to the reflux port (601) and is installed with a second valve (1002).

5. The device for testing the performance of polymer grouting samples according to claim 4, characterized in that: The lifting mechanism comprises a servo motor (14), a protection frame (1401), a ball screw (1402) and a screw sleeve (1403); the servo motor (14) is fixedly connected to the top of the working box (2); the protection frame (1401) is fixedly connected to the upper inner wall of the working box (2); the ball screw (1402) is rotatably connected inside the protection frame (1401); the output end of the servo motor (14) is fixedly connected to the ball screw (1402); the screw sleeve (1403) is fixedly connected to the lower end of the center column (8); and the screw sleeve (1403) is threadedly connected to the circumferential surface of the ball screw (1402).

6. The device for testing the performance of polymer grouting samples according to claim 5, characterized in that: A protective frame (1701) is fixedly connected to the top of the test bench (17), and the pressure tester (15) is located inside the protective frame (1701).

7. A polymer grouting sample performance testing device according to claim 6, characterized in that: The top of the transverse support (801) is fixedly connected to a top cover (3), and the transverse support (801) and a plurality of upper cover cylinders (9) are all located inside the top cover (3).

8. The device for testing the performance of polymer grouting samples according to claim 7, characterized in that: A temperature and humidity sensor is installed inside each of the barrels (7), a controller (16) is arranged outside the working box (2), and a plurality of the temperature and humidity sensors are connected to the controller (16) via telecommunication.

9. A method for testing the performance of a polymer grouting sample, applied to the device for testing the performance of a polymer grouting sample as claimed in claim 8, characterized in that: The steps include: S1. Sample selection: select a number of polymer grouting materials as samples, determine that each group has at least three samples, and select the first group to be placed in the working area of ​​the pressure tester (15). Use the pressure tester (15) to test the compressive strength of each sample, and record the average value as A1. The remaining groups of samples are placed in the material grooves (702) of different barrels (7), and then control the output end of the servo motor (14) to drive the ball screw (1402) to rotate. The ball screw (1402) drives the screw sleeve (1403) to move downward. At this time, the central column (8), the horizontal bracket (801) and the plurality of upper cover barrels (9) move downward accordingly, so that the plurality of upper cover barrels (9) are closed with the corresponding barrels (7), providing a testing environment in which the samples do not affect each other; S2, immersion test: clean water is pumped into the first hose (1102) and into the first diverter ring (1101) through the first liquid pump (1103), and the plurality of third valves (1104) are opened, so that the clean water flows through the second hose (1105) and into the corresponding sprayer (11), and finally sprayed into the corresponding plurality of barrels (7) through the sprayer (11), so that the plurality of groups of samples are immersed in the clean water; S3, spray test: The bacterial liquid is pumped into the third hose (1202) and into the second diverter ring (1201) through the second liquid pump (1203), and a plurality of fourth valves (1204) are opened, and the bacterial liquid flows through the fourth hose (1205) and into the corresponding atomizer (12), and finally atomized through the sprayer (11) and enters into the corresponding plurality of barrels (7), and the atomized liquid is evenly diffused in the barrel (7) and surrounds the sample, and the corresponding second valve (1002) is opened, and the bacterial liquid flows back into the bacterial liquid tank (6), and the second liquid pump (1203) is controlled to work continuously, and a continuous bacterial liquid spray test is performed on the sample; S4, temperature test: start a plurality of heaters (13) to heat the barrel (7) so that the temperature inside the barrel (7) is 50-200 degrees Celsius, and adopt 10-30 degrees Celsius as a stepping interval, and select different temperature tests for samples in different areas; S5, performance test: after the sample is tested for 72 hours, the output end of the servo motor (14) is controlled to rotate in the opposite direction to return the upper cover cylinder (9) to its original position, and then a number of samples are taken out, and each group of samples is sequentially placed in the pressure tester (15), and the compressive strength of the sample is tested by the pressure tester (15), and the average value of the compressive strength data of each group of samples is recorded, and the sample data of S2 is divided into group B, and the sample data of S4 is divided into group C; S5-1, cleaning: after taking out the sample, the upper cover cylinder (9) is controlled to be closed with the barrel (7) downward again, and then a plurality of first valves (1001) are opened, and the second valve (1002) opened in step S3 is closed. At this time, each first liquid pump (1103) is started again, so that clean water is sprayed from the sprayer (11) into each barrel (7), thereby cleaning the barrel (7), and waste water enters the waste water tank (4) through the three-way pipe (10) to collect the waste water in a centralized manner; S6. Define strength: Compare the compressive strength of groups B and C with A1 and calculate the corrosion resistance coefficient to evaluate their corrosion resistance.

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