Experimental device for flexible net impacted by debris flow

Abstract

The invention relates to the technical field of geotechnical experiments, and discloses a debris flow impact flexible net experiment device which comprises a channel, a lifting mechanism fixedly connected to the top of the channel, a locking mechanism installed at the bottom of the lifting mechanism and used for adjusting a flexible net, and an experiment assembly arranged in the locking mechanism and used for conducting a flexible net impact test. According to the invention, the requirements of different directions and different numbers of detection points of the flexible net are met, the stress conditions of the flexible net at different positions under impact are conveniently collected, accurate multi-directional detection data are provided for a debris flow impact flexible net experiment, data support is provided for the debris flow impact flexible net, and subsequent analysis of the debris flow impact flexible net is facilitated; by adopting the combined design, the overall stability of the experimental device is ensured, meanwhile, an experimenter can conveniently and quickly assemble and disassemble the experimental device, the experimental efficiency is improved, and the experimental operation difficulty is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical experiments, and particularly to an experimental device for a debris flow impact flexible net. Background Art

[0002] Debris flow is a special flood in mountain valleys, triggered by flash floods collected from heavy rainfall or melting ice and snow, and contains a large amount of solid substances such as sediment and stones. Debris flow has the characteristics of sudden outbreak, carrying a large amount of sediment and stones for rapid impact in a short time, and finally rampaging and overflowing and depositing in a wide accumulation area, causing great harm to human life and property.

[0003] Common engineering prevention and control measures for debris flow geological disasters mainly include two categories: drainage and retaining. When carrying out retaining prevention and control, in some areas, due to geological and other factors such as construction, it is inconvenient to use traditional methods such as reinforced concrete, excavation or piling as a stable foundation for retaining. Instead, a flexible net method is adopted for prevention and control. When using the flexible net method for prevention and control, it is necessary to pre-determine the specific impact resistance of the flexible net;

[0004] In the existing detection process of debris flow impact tests on flexible nets, the detection directions and quantities of the forces on the flexible nets are single, and the detection operations of forces with different quantities and directions cannot be realized. For this reason, an experimental device for a debris flow impact flexible net is proposed. Summary of the Invention

[0005] In order to solve the technical problem that in the existing detection process of debris flow impact tests on flexible nets, the detection directions and quantities of the forces on the flexible nets are single, and the detection operations of forces with different quantities and directions cannot be realized, the present invention provides an experimental device for a debris flow impact flexible net.

[0006] The present invention is realized by the following technical solutions: An experimental device for a debris flow impact flexible net, including a channel, a lifting mechanism fixedly connected to the top of the channel, a locking mechanism installed at the bottom of the lifting mechanism for adjusting the flexible net, and an experimental component arranged inside the locking mechanism for conducting a flexible net impact test;

[0007] The locking mechanism includes a cross plate fixedly connected to the output end of the bottom of the lifting mechanism. At both ends of the bottom of the cross plate, U-shaped receiving plates are fixedly connected. At the bottom between the two groups of receiving plates, a bottom plate is fixedly connected. On both sides of the top of the bottom plate, side plates fixedly connected to the receiving plates are fixedly connected. On the upper side of the mutually approaching sides of the two groups of receiving plates, insertion channels are opened. A pressing plate is slidably connected between the two groups of receiving plates. On the mutually remote sides of the two groups of receiving plates, U-shaped tension plates are fixedly connected. An installation groove slidably connected to the locking mechanism is opened on the channel, and a tension unit connected to the tension plate is fixedly connected in the installation groove;

[0008] The experimental components include a front pressing unit and a rear pressing unit slidably connected between two sets of storage plates. A flexible net for conducting experiments is arranged between the front pressing unit and the rear pressing unit. A plurality of force measuring units for detecting the impact of the flexible net are connected to the flexible net, and the end of the force measuring unit is connected to an adapter unit arranged on the front pressing unit.

[0009] As a further improvement of the above solution, the lifting mechanism includes a support frame fixedly connected between both sides of the top opening of the channel. A driving unit one fixedly connected to the cross plate is fixedly connected to the top of the support frame.

[0010] As a further improvement of the above solution, an inclined chute is fixedly connected to the inner side wall of the channel. A material bin is fixedly connected to the top end of the chute. A bracket fixedly connected to the top of the channel is fixedly connected to the bottom of the chute and the material bin. An emission port is arranged on one side of the material bin close to the chute. A discharge plate is rotatably connected to the top of the opening of the emission port. A driving unit two is hinged to the outside of the discharge plate. A bracket fixedly connected to the outer side wall of the material bin is hinged to the top of the driving unit one.

[0011] As a further improvement of the above solution, the front pressing unit includes a ring-shaped bearing frame one. A ring-shaped abutting plate is fixedly connected to one side of the bearing frame one. A ring-shaped yield plate is fixedly connected to the side of the abutting plate away from the bearing frame one. The yield plate is provided with a cross-shaped storage groove extending to the abutting plate, and the storage groove is docked with the adapter unit. Both ends of the side of the bearing frame one away from the abutting plate are fixedly connected with a guide plate one slidably connected to the storage plate.

[0012] As a further improvement of the above solution, the rear pressing unit includes a ring-shaped bearing frame two. A ring-shaped positioning plate for abutting against the adapter unit is fixedly connected to one side of the bearing frame two. An extrusion plate for yielding of the flexible net fixedly connected to the bearing frame two is arranged inside the inner circle of the positioning plate. Both ends of the other side of the bearing frame two are fixedly connected with a guide plate two slidably connected to the storage plate.

[0013] As a further improvement of the above solution, the force measuring unit includes a tension sensor for testing the tension after the yielding of the flexible net. Both ends of the tension sensor are fixedly connected with a pull rope connected to the adapter unit, and the pull rope is connected to the flexible net in a way that penetrates the flexible net in an up-and-down staggered manner.

[0014] As a further improvement of the above solution, the adapter unit includes a cross-shaped plug-in plate inserted into the front pressing unit. A connection hole connected to the force measuring unit is arranged at one end of the plug-in plate extending into the inner circle of the front pressing unit.

[0015] As a further improvement of the above solution, the front pressing unit and the rear pressing unit are fixedly connected by means of bolts and nuts.

[0016] As a further improvement of the above solution, the tensioning unit includes tensioning rods embedded in the channel, and the tensioning rods are arranged in sequence along the height direction of the channel. One end of the tensioning rod extending into the installation groove is fixedly connected with two groups of tensioning discs distributed along the length direction of the tensioning rod, and the tensioning discs are slidably connected with the storage board.

[0017] As a further improvement of the above solution, a detection frame is installed at the top of the channel. Cameras are installed on both the detection frame and the lifting mechanism. A water pipe for cleaning the channel is installed on the detection frame. A flow sensor for detecting the flow rate of debris flow and a displacement sensor for detecting the height of the top of the debris flow are installed on the detection frame.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The present invention realizes the debris flow impact test on the flexible net by means of yield bending of the flexible net and installing the force measuring unit in different orientations, changing the defect that the traditional anchor points are fixed and the detection positions are not easy to adjust, facilitating the realization of the requirements for different orientations and different numbers of detection points of the flexible net, facilitating the collection of the force conditions at different positions of the flexible net under impact, providing accurate multi-directional detection data for the debris flow impact on the flexible net, and providing data support for the debris flow impact on the flexible net according to the flow rate of the debris flow, the height of the debris flow and the impact force detected by the force measuring unit, facilitating the subsequent analysis of the debris flow impact on the flexible net.

[0020] 2. The present invention adopts a combined design, which can not only ensure the overall stability of the experimental device, but also facilitate the experimenter to quickly assemble and disassemble the experimental device, improve the experimental efficiency and reduce the experimental operation difficulty. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of an experimental device for debris flow impact on a flexible net provided by the present invention;

[0022] Figure 2 It is a schematic structural diagram of the lifting mechanism provided by the present invention;

[0023] Figure 3 It is a schematic structural diagram of the locking mechanism provided by the present invention;

[0024] Figure 4 It is a schematic structural diagram of the experimental component provided by the present invention;

[0025] Figure 5 It is a sectional view of the experimental component provided by the present invention;

[0026] Figure 6 It is provided by the present invention Figure 5 The schematic structural diagram of the partial enlargement at A in

[0027] Figure 7 Schematic structural diagram of the front pressing unit provided by the present invention;

[0028] Figure 8 Schematic structural diagram of the rear pressing unit provided by the present invention;

[0029] Figure 9 Schematic structural diagram of the connection unit provided by the present invention;

[0030] Figure 10 Schematic structural diagram of the tensioning unit provided by the present invention.

[0031] Main symbol description:

[0032] 1, channel; 2, chute; 3, material bin; 4, installation groove; 5, lifting mechanism; 6, locking mechanism; 7, experimental component; 21, front pressing unit; 22, rear pressing unit; 23, flexible net; 24, connection unit; 31, bearing frame one; 32, abutting plate; 33, yield plate; 34, storage groove; 35, guiding plate one; 41, bearing frame two; 42, pressing plate; 43, positioning plate; 44, guiding plate two; 61, cross plate; 62, storage plate; 63, bottom plate; 64, side plate; 65, tensioning plate; 66, extending channel; 67, pressing plate; 241, plug-in plate; 242, connection hole; 71, tensioning rod; 72, tensioning disc. Specific embodiments

[0033] Next, in combination with the accompanying drawings and specific embodiments, the present invention will be further described. It should be noted that, on the premise of non-conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0034] Embodiment 1:

[0035] Please refer to Figures 1-10 the figure. An experimental device for a debris flow impact flexible net in this embodiment includes a channel 1, a lifting mechanism 5 fixedly connected to the top of the channel 1, a locking mechanism 6 installed at the bottom of the lifting mechanism 5 for adjusting the flexible net, and an experimental component 7 disposed inside the locking mechanism 6 for conducting a flexible net impact test. The experimental component 7 installed on the locking mechanism 6 is lowered into the installation groove 4 of the channel 1 by using the lifting mechanism 5;

[0036] The locking mechanism 6 includes a cross plate 61 fixedly connected to the bottom output end of the lifting mechanism 5. At both ends of the bottom of the cross plate 61, U-shaped receiving plates 62 are fixedly connected. At the bottom between the two groups of receiving plates 62, a bottom plate 63 is fixedly connected. On both sides of the top of the bottom plate 63, side plates 64 fixedly connected to the receiving plates 62 are fixedly connected. Above one side of the two groups of receiving plates 62 close to each other, insertion channels 66 are provided. A pressing plate 67 is slidably connected between the two groups of receiving plates 62. On one side of the two groups of receiving plates 62 away from each other, U-shaped tension plates 65 are fixedly connected. An installation groove 4 for slidably connecting the locking mechanism 6 is provided on the channel 1. A tensioning unit connected to the tension plate 65 is fixedly connected in the installation groove 4. After the experimental assembly 7 is assembled, it enters the receiving plate 62 from the insertion channel 66 at the top of the receiving plate 62, and the test assembly 7 is pushed downward along the receiving plate 62, so that the bottom of the experimental assembly 7 abuts against the top of the bottom plate 63. Then, the pressing plate 67 is pushed downward and pressed on the top of the experimental assembly 7, and the pressing plate 67 is fixed by using bolts provided on the receiving plate 62, so that the experimental assembly 7 is fixed inside the locking mechanism 6;

[0037] When the locking mechanism 6 slides downward into the installation groove 4, the tension plate 65 extends into the space between the two tension discs 72 on the tension rod 71, and the two tension discs 72 limit the tension plate 65 from the inside and outside, so that when the locking mechanism 6 is lowered, it is tightened by the tensioning unit, making the force on the locking mechanism 6 balanced, avoiding deformation of the locking mechanism 6 during the impact test, and reducing the detection error;

[0038] The experimental assembly 7 includes a front pressing unit 21 and a rear pressing unit 22 that are slidably connected between the two groups of receiving plates 62. A flexible net 23 for conducting experiments is arranged between the front pressing unit 21 and the rear pressing unit 22. A plurality of force measuring units for detecting the impact of the flexible net 23 are connected to the flexible net 23, and the end of the force measuring unit is connected to an adapter unit 24 arranged on the front pressing unit 21.

[0039] The front pressing unit 21 includes a ring-shaped bearing frame one 31. On one side of the bearing frame one 31, a ring-shaped abutting plate 32 is fixedly connected. On the side of the abutting plate 32 away from the bearing frame one 31, a ring-shaped yielding plate 33 is fixedly connected. The yielding plate 33 is provided with a cross-shaped receiving groove 34 extending to the abutting plate 32, and the receiving groove 34 is docked with the adapter unit 24. At both ends of the side of the bearing frame one 31 away from the abutting plate 32, guide plates one 35 slidably connected to the receiving plates 62 are fixedly connected.

[0040] The rear pressing unit 22 includes a ring-shaped bearing frame two 41. On one side of the bearing frame two 41, a ring-shaped positioning plate 43 for abutting against the adapter unit 24 is fixedly connected. An extrusion plate 42 for the yielding of the flexible net 23 fixedly connected to the bearing frame two 41 is arranged inside the inner circle of the positioning plate 43. At both ends of the other side of the bearing frame two 41, guide plates two 44 slidably connected to the receiving plates 62 are fixedly connected.

[0041] The force measuring unit includes a tension sensor for testing the tension after the yielding of the flexible net 23. Both ends of the tension sensor are fixedly connected with stay ropes connected to the connection unit 24, and the stay ropes are connected to the flexible net 23 in a way that they penetrate the flexible net 23 in a staggered up-and-down manner. When installing the force measuring unit, select a suitable position for installation according to the need for impact detection of the flexible net 23, arrange it on the flexible net 23. The stay ropes penetrate the flexible net 23 in a staggered up-and-down manner and then are connected to the connection holes 242 on the corresponding plug-in board 241, and at the same time, keep the force measuring unit in a tensioned state. After the flexible net 23 is impacted by sediment, the flexible net 23 deforms. The force measuring units distributed at different positions and in different directions on the flexible net 23 can detect the magnitudes of the impact forces on different parts of the flexible net 23, changing the defect of single experimental data in the traditional impact test of the flexible net 23, and facilitating the later analysis of the impact test data of the flexible net.

[0042] The connection unit 24 includes a plug-in board 241 with a cross-shaped structure that is plugged into the front pressing unit 21. One end of the plug-in board 241 extending into the inner circle of the front pressing unit 21 is provided with a connection hole 242 for connecting with the force measuring unit;

[0043] When installing the flexible net 23, pre-place the connection unit 24 in the corresponding storage groove 34 according to the need for impact detection of the flexible net 23, then lay the flexible net 23 flat above the yielding plate 33, and at the same time keep the flexible net 23 in a flattened state. Then push the rear pressing unit 22 downward to start squeezing and fixing the flexible net 23. At this time, when the pressing plate 42 on the second bearing frame 41 moves towards the first bearing frame 31, it forms a Z-shaped yielding extrusion with the yielding plate 33 on the flexible net 23, performing yielding extrusion on the border position of the flexible net 23, bending the border position of the flexible net 23, realizing the pulling of the flexible net 23 in all directions, making the flexible net 23 taut, and effectively avoiding the flexible net from detaching and loosening during impact by bending and yielding the flexible net 23, improving the installation strength and firmness of the flexible net 23. When installing the flexible net 23, the inner circle of the positioning plate 43 abuts against the outer circle of the yielding plate 33, realizing the positioning operation during the installation of the front pressing unit 21 and the rear pressing unit 22. At the same time, after installation, the positioning plate 43 presses and abuts against the end of the connection unit 24, and the pressing plate 42 presses and abuts against the connection unit 24, avoiding the connection unit 24 from shaking during the force application process and improving the stability during the detection process. Finally, use bolts and nuts to realize the overall connection and fixation of the front pressing unit 21 and the rear pressing unit 22.

[0044] The front pressing unit 21 and the rear pressing unit 22 are fixedly connected by bolts and nuts. The first guiding plate 35 is provided with a first through hole that sequentially penetrates the first guiding plate 35, the second bearing frame 41, the abutting plate 32, and the yielding plate 33. The second guiding plate 44 is provided with a second through hole that penetrates the second guiding plate 44 and the second bearing frame 41. Bolts extend into the first through hole and the second through hole to connect the front pressing unit 21 and the rear pressing unit 22.

[0045] Embodiment 2:

[0046] On the basis of Embodiment 1, the further improvement of this embodiment lies in that the lifting mechanism 5 includes a support frame fixedly connected between both sides of the top opening of the channel 1, and a first driving unit fixedly connected to the top of the support frame and fixedly connected to the cross plate 61.

[0047] The inner side wall of the channel 1 is fixedly connected with an inclined chute 2. The top end of the chute 2 is fixedly connected with a material bin 3. The bottom of the chute 2 and the material bin 3 is fixedly connected with a support frame fixedly connected to the top of the channel 1. A discharge port is provided on one side of the material bin 3 close to the chute 2. The top of the opening of the discharge port is rotatably connected with a discharge plate. A second driving unit is hinged to the outside of the discharge plate. The top of the first driving unit is hinged to a support frame fixedly connected to the outer side wall of the material bin 3. The sediment for the impact test is put into the material bin 3, and the sediment slides downward along the material bin 3 and the chute 2 and enters the channel 1 to conduct a debris flow simulation impact test on the flexible net 23 installed on the channel 1.

[0048] The tensioning unit includes tensioning rods 71 embedded in the channel 1, and the tensioning rods 71 are sequentially arranged along the height direction of the channel 1. Two tensioning discs 72 distributed along the length direction of the tensioning rod 71 are fixedly connected to one end of the tensioning rod 71 extending into the installation groove 4, and the tensioning discs 72 are slidably connected with the storage plate 62.

[0049] A detection frame is installed on the top of the channel 1. Cameras are installed on both the detection frame and the lifting mechanism 5. A water pipe for cleaning the channel 1 is installed on the detection frame. A flow sensor and a displacement sensor are installed on the detection frame. The flow sensor is used to detect the flow velocity of the debris flow passing through the channel 1, and the displacement sensor is used to detect the height of the top of the debris flow passing through the channel 1 to determine the depth of the debris flow in the channel 1. According to the detected flow velocity of the debris flow, the height of the debris flow, and the impact force detected by the force measuring unit, data support is provided for the debris flow to impact the flexible net, which is convenient for subsequent analysis of the debris flow impacting the flexible net.

[0050] A control box is installed on one side of the channel 1. A controller and a storage battery are arranged inside the control box. A display screen, a power interface, a data interface, and a switch are installed on one side of the control box. Both the first driving unit and the second driving unit adopt push rod motors. The controller is connected to the tension sensor, the flow sensor, the displacement sensor, the camera, the push rod motor, the storage battery, the display screen, the power interface, the data interface, and the switch.

[0051] The present invention realizes the debris flow impact test on the flexible net by means of yielding and bending the flexible net and installing force measuring units in different orientations, changes the defect that the traditional anchoring points are fixed and the detection positions are not easy to adjust, facilitates the realization of the requirements for different orientations and different numbers of detection points of the flexible net, facilitates the collection of the stress conditions at different positions of the flexible net under impact, provides accurate multi-orientation detection data for the debris flow impact on the flexible net, provides data support for the debris flow impact on the flexible net according to the flow velocity of the debris flow, the height of the debris flow and the impact force detected by the force measuring unit, and facilitates the subsequent analysis of the debris flow impact on the flexible net; adopts a modular design, which can not only ensure the overall stability of the experimental device but also facilitate the rapid assembly and disassembly operation of the experimental device by the experimental personnel, improve the experimental efficiency and reduce the experimental operation difficulty.

[0052] The above-mentioned implementation manners are only the preferred implementation manners of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection required by the present invention.

Claims

1. An experimental device for a debris flow impact flexible net, characterized in that, It includes a channel, a lifting mechanism fixed to the top of the channel, a locking mechanism installed at the bottom of the lifting mechanism for adjusting the flexible net, and an experimental component arranged inside the locking mechanism for performing an impact test on the flexible net; The locking mechanism comprises a horizontal plate fixedly connected to the bottom output end of the lifting mechanism, two ends of the bottom of the horizontal plate are fixedly connected to U-shaped storage plates, the bottom between the two groups of storage plates is fixedly connected to a bottom plate, both sides of the top of the bottom plate are fixedly connected to side plates fixed to the storage plates, an insertion channel is provided above the side where the two groups of storage plates are close to each other, a pressing plate is slidably connected between the two groups of storage plates, a tensioning plate of a U-shaped structure is fixedly connected to the side where the two groups of storage plates are far away from each other, a mounting groove slidably connected to the locking mechanism is provided on the channel, and a tensioning unit connected to the tensioning plate is fixedly connected in the mounting groove; The experimental component includes a front clamping unit and a rear clamping unit which are slidably connected between two groups of storage plates. A flexible net for conducting experiments is arranged between the front clamping unit and the rear clamping unit. A plurality of force measuring units for detecting the impact of the flexible net are connected to the flexible net. The ends of the force measuring units are connected to connecting units arranged on the front clamping unit.

2. The experimental device for a debris flow impact flexible net according to claim 1, characterized in that, The lifting mechanism comprises a support frame fixedly connected between two sides of the top opening of the channel, and a driving unit 1 fixedly connected to the cross plate is fixedly connected to the top of the support frame.

3. The experimental device for a debris flow impact flexible net according to claim 1, characterized in that, The inner side wall of the channel is fixedly connected with an inclined chute, the top of the chute is fixedly connected with a material bin, the bottom of the chute and the material bin is fixedly connected with a bracket fixed with the top of the channel, a discharge port is opened on the side of the material bin close to the chute, a discharge plate is rotatably connected with the top of the discharge port opening, a drive unit 2 is hingedly connected to the outer side of the discharge plate, and a bracket fixed with the outer side wall of the material bin is hingedly connected to the top of the drive unit 1.

4. The experimental device for a debris flow impact flexible net according to claim 1, characterized in that, The front side clamping unit includes a supporting frame with an annular structure, a resistance plate with an annular structure is fixedly connected to one side of the supporting frame, a yield plate with an annular structure is fixedly connected to the side of the resistance plate away from the supporting frame, the yield plate is provided with a cross-shaped storage groove extending to the resistance plate, and the storage groove is connected to the connecting unit, and guide plates 1 that are slidably connected to the storage plate are fixedly connected to both ends of the side of the supporting frame away from the resistance plate.

5. The experimental device for a debris flow impact flexible net according to claim 1, characterized in that, The rear side clamping unit includes a supporting frame 2 with an annular structure, a positioning plate with an annular structure fixedly connected to one side of the supporting frame 2 for contacting the connecting unit, an extrusion plate fixedly connected to the supporting frame 2 for yielding the flexible net is arranged on the inner circle of the positioning plate, and guide plates 2 slidably connected to the storage plate are fixedly connected to both ends of the other side of the supporting frame 2.

6. The experimental device for a debris flow impact flexible net according to claim 1, characterized in that, The force measuring unit comprises a tension sensor for testing the yielding of the flexible net. Both ends of the tension sensor are fixed with a pull rope connected to the connection unit, and the pull rope is connected to the flexible net in a manner of penetrating the flexible net in an up-and-down staggered manner.

7. The experimental device for a debris flow impact flexible net according to claim 1, characterized in that, The connection unit comprises a plug-in plate of a cross structure plugged into the front side pressing unit, and one end of the plug-in plate extending into the inner circle of the front side pressing unit is provided with a connection hole connected to the force measuring unit.

8. The experimental device for a debris flow impact flexible net according to claim 1, characterized in that, The front side pressing unit and the rear side pressing unit are fixedly connected by means of bolts and nuts.

9. The experimental device for a debris flow impact flexible net according to claim 1, characterized in that, The tensioning unit includes a tensioning rod embedded in the channel, and the tensioning rods are arranged in sequence along the channel height direction. One end of the tensioning rod extending into the installation groove is fixedly connected to two groups of tensioning disks distributed along the length direction of the tensioning rod, and the tensioning disk is slidably connected to the storage plate.

10. An experimental device for a debris flow impact flexible net according to claim 1, characterized in that, A detection frame is installed at the top of the channel. Cameras are installed on both the detection frame and the lifting mechanism. A water pipe for channel cleaning is installed on the detection frame. A flow sensor for detecting the flow rate of debris flow and a displacement sensor for detecting the height of the top of the debris flow are installed on the detection frame.

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