Cylindrical pier debris flow scouring mode simulation device

Abstract

The utility model discloses a cylindrical bridge pier debris flow scouring mode simulation device, which belongs to the technical field of debris flow scouring simulation test equipment and comprises a stirring container, the stirring container is a cylinder with an upper opening, support plates with right trapezoid cross sections are inwards arranged at symmetrical positions on two sides of an upper opening area, and the support plates are arranged on the upper opening area. A servo motor is fixed between the support plates, an output shaft of the servo motor is downwards connected with a stirring shaft through a coupler, the stirring shaft extends into the stirring container, and three groups of test assemblies with different heights are arranged on a shaft body of the stirring shaft. The test assembly comprises two connecting plates which are symmetrically distributed by taking the axis of the stirring shaft as a midpoint, test piece placing tables are fixed on the upper surfaces of the outer ends of the connecting plates, and cylindrical test piece containers with openings in the upper parts are arranged on the upper surfaces of the test piece placing tables. According to the simulation device, a plurality of groups of test assemblies with different heights are arranged on the same stirring shaft, so that on the premise of not influencing the motion state of debris flow, the arrangement number of test points is increased, the accuracy of test data is improved, and meanwhile, the stirring container is relatively good in stability and convenient to move.

Description

Technical Field

[0001] The utility model relates to the technical field of debris flow scouring simulation test equipment, and more specifically to a debris flow scouring mode simulation device for a cylindrical bridge pier. Background Art

[0002] Mountainous areas in my country account for 2 / 3 of the country's land area. With the development of my country's economy, more and more bridges need to be built in mountainous areas. Various natural disasters occur frequently in mountainous areas, and debris flow is one of the main geological disasters. Therefore, it is urgent to study the damage mechanism of debris flow on bridges. Indoor experiments can partially reproduce the debris flow process to simulate the impact of debris flow scouring on bridge piers. The existing simulation test equipment has the following problems: First, the number of measurement points is small, and the data obtained is limited, which cannot truly reflect the scouring effect. However, if too many measurement points are arranged at the same location, it will affect the movement state of the debris flow; second, the overall stability of the existing bridge pier debris flow scouring simulation device is not good enough, and it is not convenient to move. Utility Model Content

[0003] The utility model aims to provide a device for simulating the scouring mode of debris flow on a cylindrical bridge pier. The device sets a plurality of test components with different heights on the same stirring shaft. Under the premise of not affecting the movement state of the debris flow, the number of measuring point arrangements is increased, the accuracy of the test data is improved, and at the same time, the stirring container has good stability and is easy to move.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A device for simulating the scouring mode of debris flow on a cylindrical pier comprises a stirring container, wherein the stirring container is in the shape of a cylinder with an opening at the top, wherein support plates with a right-angled trapezoidal cross section are provided inwardly at symmetrical positions on both sides of the upper opening area, a servo motor is fixed between the support plates, the output shaft of the servo motor is downwardly connected to a stirring shaft through a coupling, the stirring shaft extends into the stirring container, three groups of test assemblies with different heights are provided on the shaft body of the stirring shaft, the test assemblies comprise two connecting plates symmetrically distributed with the axis center of the stirring shaft as the midpoint, a specimen placing table is fixed to the upper surface of the outer end of the connecting plate, and a cylindrical specimen container with an opening at the top is provided on the upper surface of the specimen placing table.

[0006] As a further optimization of the solution of the present application, L-shaped brackets are distributed in a regular triangle around the outer side of the mixing container, the lower ends of the L-shaped brackets are connected to universal wheels, and a locking button is provided on the side of the rotating part of the universal wheel.

[0007] As a further optimization of the solution of the present application, the servo motor is externally connected to a control panel and a power supply, the test material is placed in the cylindrical test container, and a fan-shaped valve port is provided at the bottom of the stirring container.

[0008] As a further optimization of the solution of the present application, among the test assemblies, the test assembly located at the bottom is five centimeters away from the bottom of the stirring container and the distance between adjacent test assemblies is six centimeters.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0010] The utility model is provided with three groups of test assemblies with different heights. By placing the test material in the cylindrical test container and cooperating with the servo motor, the scouring and abrasion conditions of the cylindrical bridge pier by the debris flow under different flow speeds are simulated. Under the premise of not affecting the movement state of the debris flow, the number of measurement points is increased and the accuracy of the test data is improved.

[0011] The utility model is provided with a universal wheel with a locking button and an L-shaped bracket structure distributed in an equilateral triangle, which support and limit the stirring container and improve the stability of the stirring container during the simulation test. At the same time, after the locking button is opened, the device can be conveniently moved through the universal wheel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the upper structure of the simulation device of the utility model;

[0013] Figure 2 This is a schematic diagram of the connection structure of the test assembly of the utility model;

[0014] Figure 3 This is a top view of the simulation device of the utility model;

[0015] Figure 4 It is a schematic diagram of the lower structure of the simulation device of the utility model;

[0016] In the figure: 1. stirring container; 2. L-shaped bracket; 3. universal wheel; 4. bracket plate; 5. servo motor; 6. stirring shaft; 7. cylindrical specimen container; 8. coupling; 9. specimen placement table; 10. connecting plate; 11. valve port. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the utility model easy to understand, the utility model is further explained below with reference to specific diagrams.

[0018] In order to solve the problem that the existing debris flow scour simulation device has a small number of measuring points, the data obtained is limited, and it cannot truly reflect the scour effect. However, if too many measuring points are arranged at the same location, it will affect the movement state of the debris flow. Figure 1 and Figure 2 As shown, the present application includes a stirring container 1, which is a cylindrical shape with an opening at the top, wherein support plates 4 with a right-angled trapezoidal cross section are provided inwardly at symmetrical positions on both sides of the upper opening area, a servo motor 5 is fixed between the support plates 4, and the output shaft of the servo motor 5 is downwardly connected to a stirring shaft 6 through a coupling 8, and the stirring shaft 6 extends into the stirring container 1. Three groups of test assemblies with different heights are provided on the shaft body of the stirring shaft 6, and the test assemblies include two connecting plates 10 symmetrically distributed with the axis of the stirring shaft 6 as the midpoint, and the upper surfaces of the outer ends of the connecting plates 10 are fixed with test piece placement tables 9, and the upper surface of the test piece placement table 9 is provided with a cylindrical test piece container 7 with an opening at the top;

[0019] In order to solve the problems of poor stability and inconvenient movement of existing debris flow simulation devices, such as Figure 1 , Figure 3 and Figure 4 As shown, L-shaped brackets 2 are distributed in the shape of a regular triangle around the outer side of the stirring container 1, and the lower ends of the L-shaped brackets 2 are connected to universal wheels 3. A locking button is provided on the side of the rotating part of the universal wheel 3. The servo motor 5 is externally connected to a control panel and a power supply. The test piece material is placed in the cylindrical test piece container 7, and a fan-shaped valve port 11 is provided at the bottom of the stirring container 1.

[0020] Specifically, the stirring container 1 can be selected to have an inner diameter of 50 cm, an outer diameter of 52 cm, and a height of 70 cm. The servo motor 5 can flexibly and accurately adjust the rotation speed to change the flow rate of the simulated debris flow. The stirring shaft 6 has a diameter of 5 cm and a length of 65 cm. The test assembly at the bottom is five centimeters away from the bottom of the stirring container 1 and the distance between adjacent test assemblies is six centimeters. The specimen placement table 9 is a square with a side length of 12 cm and a thickness of 0.5 cm. The cylindrical specimen container 7 has an inner diameter of 10.2 cm, an outer diameter of 10.5 cm, and a height of 5 cm.

[0021] When conducting a specific test, an appropriate amount of simulated debris flow mixture from a certain area in my country is poured into the mixing container 1. After the initial mass of the specimen material is determined, plain concrete, end hook steel fiber and mixed fiber concrete specimen materials are placed in the cylindrical specimen container 7, respectively. The speed of the servo motor 5 is adjusted to 1440RPM, and the scouring test is carried out for 3, 6 and 9 hours respectively. Finally, the data such as the mass after abrasion, the abrasion mass difference, the abrasion loss rate and the mean value are measured and calculated, as shown in Table 1.

[0022]

[0023] Table 1

[0024] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A device for simulating the scouring pattern of debris flow on a cylindrical bridge pier, characterized in that: It includes a stirring container, which is a cylindrical container with an opening at the top, wherein support plates with a right-angled trapezoidal cross-section are provided inwardly at symmetrical positions on both sides of the upper opening area, a servo motor is fixed between the support plates, the output shaft of the servo motor is downwardly connected to a stirring shaft through a coupling, the stirring shaft extends into the stirring container, and three groups of test components with different heights are provided on the shaft body of the stirring shaft, the test components include two connecting plates symmetrically distributed with the axis of the stirring shaft as the midpoint, the upper surfaces of the outer ends of the connecting plates are fixed with test piece placement tables, and the upper surface of the test piece placement table is provided with a cylindrical test piece container with an opening at the top.

2. The device for simulating debris flow scour patterns of cylindrical bridge piers according to claim 1, characterized in that: The outer side of the mixing container is provided with L-shaped brackets distributed in a regular triangle shape around the outer side, the lower ends of the L-shaped brackets are connected with universal wheels, and the side surfaces of the rotating parts of the universal wheels are provided with locking buttons.

3. The device for simulating debris flow scour patterns of cylindrical bridge piers according to claim 2, characterized in that: The servo motor is externally connected to a control panel and a power supply. The test material is placed in the cylindrical test container. A fan-shaped valve port is provided at the bottom of the stirring container. Among the test assemblies, the test assembly at the bottom is five centimeters away from the bottom of the stirring container and the distance between adjacent test assemblies is six centimeters.

Images