Anti-scour tester

Abstract

The present invention discloses an anti-scour tester, comprising a box body, the box body having a sealed water storage chamber and an installation chamber, the bottom of the water storage chamber having a first connection port; a sample holding assembly, arranged on the upper surface of the box body corresponding to the water storage chamber, the top of the sample holding assembly having a water inlet and the bottom having a water outlet; and a pumping system, having a pumping pump, a first connecting pipe and a second connecting pipe, the inlet of the pumping pump being connected to the first connection port through the first connecting pipe, and the outlet of the pumping pump being connected to the water inlet through the second connecting pipe. The present invention advantageously provides a digital anti-scour tester suitable for soil and artificial composite soil, filling the gap that there is no special test instrument for anti-scour test of soil and artificial composite soil. The present invention utilizes the pumping system to provide a continuous and stable scour flow rate to the sample, and the high-pressure water provided by the pumping system flows into the box body again after passing through the sample holding part, thereby realizing the recycling of water resources.

Description

Technical Field

[0001] The invention relates to the field of anti-scour performance testing, in particular to an anti-scour tester. Background Art

[0002] In actual projects, bank slope dams and road surface structures are often washed away by water. When the scouring velocity exceeds the starting erosion velocity of the soil itself, the surface of the soil is eroded away at a certain speed. When the erosion accumulates to a certain amount, structural defects will occur, leading to project failure. Therefore, it is of great significance to conduct anti-scouring tests on the soil before construction. However, the existing research on anti-scouring tests is limited to anti-scouring tests on concrete components, and there are no anti-scouring instruments suitable for soil and artificial composite soil on the market. Therefore, how to design a test instrument that is suitable for anti-scouring tests on soil and artificial composite soil is a difficulty that people in this industry need to overcome. Summary of the invention

[0003] The purpose of the present invention is to provide an anti-scour test instrument, which can realize the anti-scour test of soil and artificial composite soil, fill the research gap of anti-scour test instruments of soil and artificial composite soil, and has promotion value.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The anti-scour tester of the present invention comprises

[0006] A box body, the box body having a sealed water storage cavity and a mounting cavity, the bottom of the water storage cavity having a first connection port and a second connection port;

[0007] a sample containing assembly, which is disposed on the upper surface of the box body corresponding to the water storage chamber, and the top of the sample containing assembly has a water inlet and the bottom has a water outlet communicated with the water storage chamber; and

[0008] A water pumping system, comprising a water pump, a first connecting pipe and a second connecting pipe, wherein the water pump is arranged in the installation cavity, and its inlet is connected to the first connecting port through the first connecting pipe, and the outlet of the water pump is connected to the water inlet through the second connecting pipe.

[0009] In a preferred embodiment of the invention, the sample holding assembly comprises

[0010] A drainage portion, comprising a drainage member and a lower connecting member fixedly connected to the upper portion of the drainage member, and the water outlet is connected and arranged at the bottom of the drainage member;

[0011] A water inlet portion, comprising a water inlet member and an upper connecting member fixedly connected to the bottom of the water inlet member, wherein the upper connecting member and the lower connecting member correspond to each other up and down and are fixedly connected together by bolts; and

[0012] a sample containing part, the upper sealing clamp of which is mounted in the lower mounting surface of the upper connecting member, and the lower sealing clamp of the sample containing part is mounted in the upper mounting surface of the lower connecting member;

[0013] Wherein, the water inlet is located at the top of the water inlet component, and the water outlet is located at the bottom of the drainage component, and the water inlet component, the sample containing part and the drainage component are connected in sequence from top to bottom.

[0014] In a preferred embodiment of the invention, the drainage member is a conical structure that is larger at the top and smaller at the bottom, and the water inlet member is an inverted conical structure that is smaller at the top and larger at the bottom, so that the water distribution is more uniform.

[0015] In a preferred embodiment of the invention, an upper positioning groove is provided on the bottom surface of the upper connecting member, a lower positioning groove is provided on the upper surface of the lower connecting member, the upper portion of the sample holding portion is clamped in the upper positioning groove and the lower portion thereof is clamped in the lower positioning groove.

[0016] In a preferred embodiment of the invention, the sample holding portion includes an upper water-permeable plate clamped in the upper positioning groove, a lower water-permeable plate clamped in the lower positioning groove, and a sample tube arranged between the upper water-permeable plate and the lower water-permeable plate, the top surface of the sample tube is sealed connected to the upper connecting member through a first sealing ring, and the bottom surface of the sample tube is sealed connected to the lower connecting member through a second sealing ring.

[0017] In a preferred embodiment of the invention, the flushing tester described in the present invention also includes an operation panel arranged on the upper table surface of the box and a power control panel arranged on one side wall of the box, and the operation panel is integrated with a frequency conversion control panel and a pressure protection switch for controlling the flow rate of the water pump, and the detection probe of the pressure protection switch is inserted into the water inlet part.

[0018] In a preferred embodiment of the invention, a flow sensor is provided on the second connecting pipe, and a flow meter integrated with a microprocessor unit is provided on the control panel, and the flow meter displays the water output flow of the water pump in real time.

[0019] In a preferred embodiment of the invention, at least one lighting lamp is suspended inside the water storage chamber. To ensure brightness, there are two lighting lamps, which facilitates a clearer observation of the water flow.

[0020] In a preferred embodiment of the invention, a first observation port for observing the drainage member is provided on the upper surface of the box body near the sample containing assembly, and a first transparent observation window is horizontally provided on the top of the first observation port.

[0021] In a more preferred embodiment of the invention, a second observation port is provided on one side wall of the box body corresponding to the drainage member, and a second transparent observation window is sealed at the second observation port.

[0022] The invention has the advantage of providing a digital anti-scour tester suitable for soil and artificial composite soil, filling the gap of the lack of special test instruments for anti-scour tests of soil and artificial composite soil. At the same time, the invention uses a pumping system to provide a continuous and stable scour flow rate to the sample, and the high-pressure water provided by the pumping system flows into the box again after passing through the sample holding part, realizing the recycling of water resources. 3 According to the calculation of flushing water consumption, the test lasts for 8 hours every day. The adoption of the present invention can save 30 cubic meters of water every day, which is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 yes Figure 1 main view.

[0025] Figure 3 It is a structural schematic diagram of the sample containing part of the present invention. DETAILED DESCRIPTION

[0026] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0027] like Figure 1-3 As shown, the anti-scour tester of the present invention comprises a box body 1, the box body 1 has a sealed water storage chamber and a sealed installation chamber, the bottom of the water storage chamber has a first connection port and a second connection port 1.1, the second connection port 1.1 is located at the lower part of the left side wall of the box body 1, the second connection port 1.1 is not only convenient for replenishing water source, but also convenient for discharging water after the test;

[0028] A sample containing assembly is arranged on the upper surface of the box body 1 corresponding to the water storage chamber, and the top of the sample containing assembly has a water inlet 2.1 and the bottom has a water outlet 2.2 connected to the water storage chamber; and

[0029] A water pumping system, the water pumping system comprises a water pump 3.1, a first connecting pipe 3.2 and a second connecting pipe 3.3, the water pump 3.1 is arranged in the installation cavity, and its inlet is connected to the first connecting port through the first connecting pipe 3.2, and the outlet of the water pump 3.1 is connected to the water inlet 2.1 through the second connecting pipe 3.3;

[0030] When working, the water pump 3.1 draws out the water in the water storage chamber and injects it into the sample holding component through the second connecting pipe 3.3, and flushes the sample in the inner cavity of the sample holding component, and then flows into the water storage chamber from the water outlet 2.2 at the bottom of the sample holding component, realizing the recycling of flushing water, which is not only energy-saving and environmentally friendly, but also can ensure the cleanliness of the laboratory.

[0031] In actual installation, the water pump 3.1 is a CNC variable frequency water pump, and its operating frequency is between 0 and 50 Hz, achieving 0 to 5 m / h. 3 The continuous and stable flow rate can maintain a head pressure of 0 to 100 m and can provide a flushing flow rate of 0 to 40 m / s during the test.

[0032] like Figure 2-3 As shown, the sample holding assembly includes a drainage portion, which has a drainage member 4.1 and a lower connecting member (i.e., a lower connecting flange 4.2) fixedly connected to the upper part of the drainage member 4.1, and the bottom of the lower connecting flange 4.2 has a water outlet 2.2, so that the flushed water flows into the water storage chamber through the water outlet 2.2; a water inlet portion, which has a water inlet member 5.1 and an upper connecting member (upper connecting flange 5.2) fixedly connected to the bottom of the water inlet member 5.1, and the lower connecting flange 4.2 and the upper connecting flange 5.2 correspond to each other from top to bottom and are fixedly connected together by bolts; and a sample holding portion, whose upper sealing card is mounted in the lower mounting surface of the upper connecting member, and the lower sealing card of the sample holding portion is mounted in the upper mounting surface of the lower connecting flange 4.2, and the water inlet member 5.1, the sample holding portion and the drainage member 4.1 are connected in sequence from top to bottom.

[0033] like Figure 3 As shown, the water inlet member 5.1 is an inverted cone structure with a small top and a large bottom and has a water inlet 2.1 on its top, and the drainage member 4.1 is a cone structure with a large top and a small bottom, so that the water flow is smoother; the upper connecting member is an upper connecting flange 5.2 fixedly connected to the water inlet member 5.1, and the lower connecting member is a lower connecting flange 4.2 horizontally fixedly connected to the top of the drainage member 4.1. The upper connecting flange 5.2 and the lower connecting flange 4.2 are fixed together by multiple bolts, and are simple and convenient to disassemble and assemble, so as to facilitate the replacement of the sample to be tested.

[0034] like Figure 3As shown, an upper positioning groove is provided on the bottom surface of the upper connecting flange 5.2, and a lower positioning groove is provided on the upper surface of the lower connecting flange 4.2; the sample containing part comprises an upper water-permeable plate 6.1 clamped in the upper positioning groove, a lower water-permeable plate 6.2 clamped in the lower positioning groove, and a sample tube 6.3 sealed between the upper water-permeable plate 6.1 and the lower water-permeable plate 6.2, a first sealing ring 6.4 is provided between the top annular surface of the sample tube 6.3 and the upper connecting flange 5.2, so as to improve the sealing performance between the upper connecting flange 5.2 and the sample tube 6.3 and prevent water leakage; a second sealing ring 6.5 is provided between the bottom annular surface of the sample tube 6.3 and the lower connecting flange 4.2, so as to improve the sealing performance between the lower connecting flange 4.2 and the sample tube 6.3 and prevent water leakage.

[0035] like Figure 3 As shown, in order to improve the sealing performance between the sample tube 6.3 and the sample ring cutter 6.6 (the soil is compacted in the ring cutter during sample preparation), the inner side of the sample tube 6.3 has a lap joint matching the sample ring cutter 6.6, and a third sealing ring 6.7 is provided between the sample ring cutter 6.6 and the lap joint.

[0036] like Figure 1-2 As shown, an operation panel 7 is arranged on the table of the box body 1, and the operation panel 7 includes, from left to right, a frequency conversion control panel 7.1 for controlling the flow rate of the water pump 3.1, a pressure protection switch 7.2 (specifically, a digital pressure electronic switch with a display meter and a microprocessing unit) and a flow meter 7.3 integrated with a microprocessing unit. The pressure protection switch 7.2 is connected in series in the control circuit of the water pump 3.1, and its detection probe is inserted into the connector of the water inlet part 5.1; when working, the detection probe collects pressure signals and displays them through the display meter of the pressure protection switch 7.2, so that the test personnel can record pressure data; when the pressure value detected by the pressure protection switch 7.2 exceeds the preset maximum pressure value, the water pump 3.1 is automatically powered off to prevent the water pump 3.1 from continuing to work after the sample is blocked, thereby protecting the water pump 3.1;

[0037] The frequency conversion control panel 7.1 is provided with a frequency knob for adjusting the working frequency of the water pump 3.1 and a start button and a pause button for controlling the water pump 3.1, so as to facilitate the adjustment of the working frequency of the water pump 3.1 and the control of the test state; the second connecting pipe 3.3 is connected with a flow sensor 3.4 for detecting the water flow rate of the water pump 3.1, and the signal detected by the flow sensor 3.4 is processed by the microprocessing unit of the flow meter 7.3 and displayed by the flow meter 7.3, so as to facilitate the recording of test data; during the test, the real-time displayed pressure and flow provide a reference for the staff, and the staff can measure the erosion amount of the sample according to the real-time displayed pressure changes and flow changes, and then obtain the anti-scouring performance of the sample.

[0038] like Figure 2As shown, in order to improve pressure stability, a water pump stabilizer 3.5 is provided on the second connecting pipe 3.3.

[0039] like Figure 1 As shown, a power control panel 8 is provided on one side wall of the box body 1, and the power control panel 8 integrates a main power switch, as well as power switches for controlling the water pump 3.1, the pressure protection switch 7.2 and the flow meter 7.3, which is easy to operate and can ensure safety.

[0040] like Figure 1 As shown, a first observation port for observing the water outlet from the bottom of the drainage component 4.1 is provided on the table top of the box body 1 near the sample holding assembly, and a first transparent observation window 9.1 is horizontally arranged on the top of the first observation port; a second observation port is provided on one side wall of the box body 1 corresponding to the drainage component 4.1, and a second transparent observation window 9.2 is sealed at the second observation port, which is not only convenient for observing the color change and flow change of the water outlet of the drainage component 4.1, but also convenient for observing the water level height inside the water storage chamber.

[0041] like Figure 1 As shown, two lighting lamps 10 are arranged inside the water storage chamber to improve the brightness and facilitate observation of the flushing situation; correspondingly, the power control panel 8 also has a power switch for controlling the lighting lamps 10.

[0042] The method for conducting a scour test using the anti-scour tester of the present invention comprises the following steps:

[0043] The first step is to seal and compact the sample to be tested in the sample ring knife (using the existing standard penetration ring knife, with an inner diameter of 61.8mm and a height of 40mm) with an impermeable adhesive, and make a through hole at the axial position of the soil sample (the shape of the through hole can be flexibly selected according to the test requirements, and can be a circular through hole or a square through hole), ensuring that the flushing water can flow through the through hole to achieve water circulation; then maintain the sample to be tested as required;

[0044] After the curing is completed, use absorbent paper or towels to absorb the water on the surface of the sample to be tested after curing in the first step, weigh and record the weight of the sample to be tested, and take photos of the upper and lower ends of the sample to be tested for future use;

[0045] The second step is to connect the second connection port 1.1 to the external water pipe to replenish the water source; then turn on each power switch on the power control panel 8, turn the frequency knob to start the water pump 3.1, and exhaust the air in the first connecting pipe 3.2 and the second connecting pipe 3.3; then reset the frequency knob to stop the water pump 3.1;

[0046] The third step is to remove the sample holding part and install the sample to be tested after curing in the first step into the sample tube 6.3. The specific contents are as follows: install the drainage piece 4.1 into the through hole on the upper table of the box body 1, and place a lower water-permeable plate 6.2 and a second sealing ring 6.5 in the lower positioning groove of the lower connecting flange 4.2; then install the sample to be tested after curing in the first step into the sample tube 6.3, and the sample tube 6.3 and the sample ring cutter 6.6 are sealed and connected through the third sealing ring 6.7; then place an upper water-permeable plate 6.1 and a first sealing ring 6.4 on the top of the sample tube 6.3; finally, use bolts to fix the upper connecting flange 5.2 and the lower connecting flange 4.2 together, and connect the second connecting pipe 3.3 to the water inlet 2.1 on the top of the water inlet piece 5.1, and seal the detection probe of the pressure protection switch 7.2 into the connector;

[0047] Step 4: Slowly rotate the frequency knob to start the water pump 3.1, and ensure that the flow rate and pipeline pressure of the water pump 3.1 increase steadily, until the water supply flow of the water pump 3.1 is consistent with the preset flow, and then start the test, and record the pressure value, the working frequency of the water pump 3.1 and the corresponding flow at this time;

[0048] Step 5. During the test, adjust the working frequency of the water pump 3.1 at regular intervals according to the test operation specifications to increase the flushing flow rate accordingly until the end of the test; and record the flushing data after each adjustment (including pressure, flow rate and working frequency of the water pump 3.1)

[0049] During the test, the test can be paused by pressing the pause button on the frequency modulation panel according to the test requirements, and the sample container can be disassembled to observe the erosion of the sample, and weigh it to calculate the erosion loss of the sample; after weighing, repeat the third step and install it on the box 1 again, and start the test again by pressing the start button, and continue the test according to the test conditions when it was paused; after the test, the sample is dried and the mass is weighed again to measure the erosion amount of the sample.

[0050] During the test, if the through hole in the middle of the sample is blocked, the water in the water inlet part 5.1 cannot flow from the through hole to the drainage part 4.1 below. At this time, the pressure value detected by the pressure protection switch 7.2 increases suddenly. When the pressure value exceeds the preset pressure, the water pump 3.1 is powered off and stops working to protect the water pump 3.1.

[0051] When the test is completely completed, turn the frequency adjustment button to the minimum state, and then turn off the power switches of various components and the main power switch on the power control panel 8 in turn.

[0052] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the direction of a certain posture (such as the attached Figure 1 The relative position relationship and movement of the components under the control of the controller (as shown in the figure) and the like, if the specific posture changes, the directional indication will also change accordingly. In the present invention, unless otherwise clearly specified and limited, the terms "connection" and "fixed" should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0053] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. An anti-scour tester, characterized in that: include A box body, the box body having a sealed water storage cavity and a mounting cavity, the bottom of the water storage cavity having a first connection port and a second connection port; a sample containing assembly, which is disposed on the upper surface of the box body corresponding to the water storage chamber, and the top of the sample containing assembly has a water inlet and the bottom has a water outlet communicated with the water storage chamber; and a water pumping system, the water pumping system comprising a water pump, a first connecting pipe and a second connecting pipe, the water pump being arranged in the installation cavity, and the inlet of the water pump being connected to the first connecting port through the first connecting pipe, and the outlet of the water pump being connected to the water inlet through the second connecting pipe; Wherein, the sample holding assembly comprises a drainage part, a water inlet part and a sample holding part, wherein the drainage part comprises a drainage member and a lower connecting member fixedly connected to the upper part of the drainage member, and the water outlet is connected and arranged at the bottom of the drainage member; the water inlet part comprises a water inlet member and an upper connecting member fixedly connected to the bottom of the water inlet member, and the upper connecting member and the lower connecting member correspond to each other up and down and are fixed together by bolts; the upper sealing clamp of the sample holding part is mounted in the lower mounting surface of the upper connecting member, and the lower sealing clamp of the sample holding part is mounted in the upper mounting surface of the lower connecting member; the water inlet is located at the top of the water inlet member, the water outlet is located at the bottom of the drainage member, and the water inlet member, the sample holding part and the drainage member are connected in sequence from top to bottom; The drainage member is a conical structure with a large top and a small bottom, and the water inlet member is an inverted conical structure with a small top and a large bottom; an upper positioning groove is provided on the bottom surface of the upper connecting member, and a lower positioning groove is provided on the upper surface of the lower connecting member, and the upper part of the sample holding part is clamped in the upper positioning groove and the lower part thereof is clamped in the lower positioning groove; The sample holding part comprises an upper water-permeable plate clamped in the upper positioning groove, a lower water-permeable plate clamped in the lower positioning groove, and a sample tube arranged between the upper water-permeable plate and the lower water-permeable plate, wherein the top surface of the sample tube is sealedly connected to the upper connecting member via a first sealing ring, and the bottom surface thereof is sealedly connected to the lower connecting member via a second sealing ring; It also includes an operation panel arranged on the upper table of the box body and a power control panel arranged on a side wall of the box body, wherein the operation panel is integrated with a frequency conversion control panel and a pressure protection switch for controlling the flow rate of the water pump, and the detection probe of the pressure protection switch is inserted on the water inlet part; the second connecting pipe is connected with a flow sensor, and the control panel is provided with a flow meter integrated with a microprocessor unit, and the flow meter displays the water outflow of the water pump in real time; At least one lighting lamp is suspended inside the water storage chamber; The steps of the anti-scouring test are as follows: The first step is to seal and compact the sample to be tested in the sample ring with an impermeable adhesive, and make a through hole at the axial position of the soil sample, and cure the sample to be tested as required; after the curing is completed, the water on the surface of the sample is removed, the weight of the sample to be tested is weighed and recorded, and the upper and lower ends of the sample to be tested are photographed and recorded for future use; The second step is to connect the external water pipe of the second connection port to replenish the water source; then turn on each power switch on the power control panel, turn the frequency knob to start the water pump, and exhaust the air in the first connection pipe and the second connection pipe; then reset the frequency knob to stop the water pump; The third step is to remove the sample holding part and install the sample to be tested after curing in the first step in the sample tube: install the drainage piece in the through hole on the upper table of the box body, and place a lower water-permeable plate and a second sealing ring in the lower positioning groove of the lower connecting flange; install the sample in the sample tube, and the sample tube and the sample ring cutter are sealed and connected through the third sealing ring; place an upper water-permeable plate and a first sealing ring on the top of the sample tube; use bolts to fix the upper connecting flange and the lower connecting flange together, and connect the second connecting pipe to the water inlet on the top of the water inlet piece, and seal the detection probe of the pressure protection switch in the connector; The fourth step is to start the water pump and turn it until the water supply flow of the water pump is consistent with the preset flow, start the test, and record the pressure value, working frequency of the water pump and the corresponding flow at this time; The fifth step is to adjust the working frequency of the water pump at regular intervals according to the test operating specifications until the end of the test, and record the adjusted flushing data each time an adjustment is made.

2. The anti-scour tester according to claim 1, characterized in that: A first observation port for observing the drainage member is provided on the upper surface of the box body close to the sample containing assembly, and a first transparent observation window is horizontally provided on the top of the first observation port.

3. The anti-scour tester according to claim 1 is characterized in that: A second observation port is provided on one side wall of the box body corresponding to the drainage member, and a second transparent observation window is sealed at the second observation port.

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