A soil submerged jet experimental device

Abstract

The present application relates to the technical field of soil erosion experiments, and more specifically, to a soil submerged jet experimental device. The soil submerged jet experimental device includes a jet experimental chamber, a syringe jet mechanism, and a piston drive mechanism; the jet experimental chamber is used to accommodate experimental soil samples; the syringe jet mechanism is connected to the jet experimental chamber and is used to accommodate liquid; the piston drive mechanism is connected to the syringe jet mechanism and is used to increase the pressure in the syringe jet mechanism, so that the liquid in the syringe jet mechanism is ejected toward the jet experimental chamber to form a jet source with a small energy level. The soil submerged jet experimental device is used to accurately measure the critical shear force of soil under immersion conditions, so as to solve the problem that the experimental method in the prior art that uses a pressure head and a pressure gauge with kPa-level accuracy to control the initial energy and shear force of the jet source cannot accurately control the initial energy and shear force of the jet source, resulting in the experimental device being unable to provide a critical flow field state for erosion.

Description

Technical Field

[0001] The present application relates to the technical field of soil erosion experiments, and in particular to a soil submerged jet experiment device. Background Art

[0002] The jet erosion test is an analytical method for quantifying erosion parameters. It aims to simulate the erosion effect of high-speed fluid on the surface of the target material through a high-speed jet formed by a high-pressure fluid (such as water or air). The particles or fluid molecules in the jet hit the surface of the material at high speed, thus causing erosion. By adjusting the pressure, speed, angle of the jet and the type and properties of the test material, the erosion effect under different conditions can be observed and analyzed, and then the critical shear force required to initiate erosion and the soil separation rate coefficient per unit of applied shear stress can be estimated using the principles of jet dynamics.

[0003] At present, when conducting soil jet erosion experiments, the existing experimental equipment is unable to achieve precise control of the jet source energy, and thus cannot form a more precise flow field, and cannot achieve regulation of small-energy-level jet sources, and thus cannot reach the critical point for erosion initiation, resulting in cumulative errors in the critical shear force measured in the experiment. Summary of the invention

[0004] The present application provides a soil submerged jet experimental device to improve the above-mentioned problems.

[0005] The present invention is specifically as follows:

[0006] A soil submerged jet test device, comprising a jet test chamber, a syringe-type jet mechanism and a piston drive mechanism;

[0007] The jet experiment chamber is used to accommodate experimental soil samples; the syringe-type jet mechanism is connected to the jet experiment chamber and is used to accommodate liquid; the piston drive mechanism is connected to the syringe-type jet mechanism and is used to increase the pressure in the syringe-type jet mechanism so that the liquid in the syringe-type jet mechanism is ejected toward the jet experiment chamber to form a jet source with a small energy level.

[0008] In one embodiment of the present invention, the syringe-type fluidic mechanism comprises a syringe, a needle, a syringe stand, a connecting nut and a connecting screw;

[0009] The syringe is used to contain liquid, and the two ends of the syringe are respectively connected to the needle and the syringe stand, the connecting screw is connected to the syringe stand, and the connecting nut is connected to the connecting screw;

[0010] The needle is used to be connected with the jet experiment chamber and to eject liquid into the jet experiment chamber; the syringe holder is connected with the piston drive mechanism through a connecting screw.

[0011] In one embodiment of the present invention, the piston drive mechanism includes a drive body, a movable rack, a piston and a drive motor;

[0012] The movable rack is movably connected to the driving body, and the piston is connected to the movable end of the movable rack; the driving motor is connected to the driving body and is used to drive the movable rack and the piston to move relative to the driving body;

[0013] The driving body is connected to the syringe frame, and the piston is movably connected to the syringe.

[0014] In one embodiment of the present invention, the driving body includes a motor base and a guide rail base, and the motor base is connected to the guide rail base;

[0015] The motor base is equipped with a syringe rack connecting ear and a motor bracket, the syringe rack connecting ear is connected to the syringe rack through a connecting screw, and the driving motor is connected to the motor bracket;

[0016] The movable rack is slidably matched with the guide rail base.

[0017] In one embodiment of the present invention, the guide rail base includes a guide rail plate, a fixing plate and a driving gear;

[0018] The guide rail plate is connected to the motor base, and the guide rail plate is formed with a slideway that can slidably cooperate with the movable rack; the fixed plate is connected to the side of the guide rail plate away from the motor base;

[0019] The driving gear is rotatably connected to the guide rail plate, and the driving gear is transmission-connected to the driving motor and meshes with the movable rack.

[0020] In one embodiment of the present invention, the guide rail base also includes a guide gear and a guide wheel; the guide gear and the guide wheel are rotatably connected to the guide rail plate, and the guide gear is meshed with the movable rack, and the guide wheel is in rolling contact with the smooth side of the movable rack.

[0021] In one embodiment of the present invention, the guide rail plate is provided with a driving hole, a first guide hole and a second guide hole;

[0022] The driving gear is accommodated in the driving hole, and the guide gear and the guide wheel are accommodated in the first guide hole and the second guide hole respectively;

[0023] The driving hole and the first guide hole are located on one side of the slideway, and the second guide hole is located on the other side of the slideway.

[0024] In one embodiment of the present invention, the jet experiment chamber comprises an experiment chamber body, a soil ring knife, an upper chamber cover and a lower chamber cover;

[0025] The two ends of the experimental bin body are open, and the soil ring knife is accommodated in the experimental bin body, and the upper bin cover and the lower bin cover are respectively threadedly connected to the two ends of the experimental bin body;

[0026] Among them, sealing rings are provided at the connection between the upper chamber cover, the lower chamber cover and the experimental chamber body; and the syringe-type jet mechanism is connected with the jet experimental chamber through the upper chamber cover.

[0027] In one embodiment of the present invention, the syringe-type jet mechanism is connected to the jet experiment chamber through the upper chamber cover;

[0028] The upper chamber cover comprises a cover body, a syringe connecting seat and an erosion product conduit;

[0029] The cover body is connected to the main body of the experimental chamber, and the syringe connecting seat and the corrosion product conduit are both connected to the cover body and communicated with the main body of the experimental chamber;

[0030] The syringe connecting seat is connected to the syringe of the syringe-type jet mechanism, and the syringe is connected to the main body of the experimental chamber; the erosion product conduit is used to guide out the erosion products in the main body of the experimental chamber.

[0031] In one embodiment of the present invention, a limiting ring is disposed in the syringe connecting seat and abuts against the syringe. The limiting ring is used to limit the length of the syringe extending into the syringe connecting seat.

[0032] The beneficial effects of the present invention are:

[0033] In summary, the soil submerged jet experiment device includes a jet experiment chamber, a syringe-type jet mechanism and a piston drive mechanism; the jet experiment chamber is used to accommodate experimental soil samples; the syringe-type jet mechanism is connected to the jet experiment chamber and is used to accommodate liquid; the piston drive mechanism is connected to the syringe-type jet mechanism and is used to increase the pressure in the syringe-type jet mechanism so that the liquid in the syringe-type jet mechanism is ejected toward the jet experiment chamber to form a jet source with a small energy level.

[0034] The soil submerged jet experimental device is used to accurately measure the critical shear force of soil under immersion conditions, so as to solve the problem that the initial energy and shear force of the jet source cannot be accurately regulated when the experimental method in the prior art uses a pressure head and a pressure gauge with kPa-level accuracy to control the initial energy and shear force of the jet source, resulting in the experimental device being unable to provide the critical flow field state of erosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the structure of the soil submerged jet experimental device provided for this application;

[0037] Figure 2 A schematic diagram of the structure of the syringe-type jet mechanism provided in this application from the first perspective;

[0038] Figure 3 A schematic diagram of the structure of the syringe-type jet mechanism provided in the present application from a second perspective;

[0039] Figure 4 A cross-sectional view of a syringe-type fluidic mechanism provided for this application;

[0040] Figure 5 A schematic structural diagram of the piston drive mechanism provided in this application from a first perspective;

[0041] Figure 6 A structural schematic diagram of the piston drive mechanism provided by the present application from a second perspective;

[0042] Figure 7 A schematic diagram of the structure of the drive motor and motor base provided in this application from a first perspective;

[0043] Figure 8 A schematic diagram of the structure of the drive motor and the motor base provided in this application from a second perspective;

[0044] Fig. 9 A schematic diagram of the structure of the guide rail base provided in this application from the first perspective;

[0045] Fig.10 A schematic diagram of the structure of the guide rail base provided by the present application from a second perspective;

[0046] Fig.11 A schematic diagram of the structure of the jet experiment chamber provided for this application;

[0047] Fig.12 A cross-sectional view of the jet test chamber provided for this application;

[0048] Fig.13 A schematic diagram of the structure of the experimental chamber provided for this application;

[0049] Fig.14 A cross-sectional view of the main body of the experimental chamber provided for this application;

[0050] Fig.15 A schematic diagram of the structure of the upper compartment cover provided for this application;

[0051] Fig.16 A cross-sectional view of the upper compartment cover provided for this application.

[0052] Icons: 100-soil submerged jet test device; 110-jet test chamber; 130-syringe jet mechanism; 150-piston drive mechanism; 131-syringe; 132-needle; 133-syringe stand; 134-connecting nut; 135-connecting screw; 151-driving body; 152-movable rack; 153-piston; 154-driving motor; 155-motor base; 156-guide rail base; 157-syringe stand connecting ear; 1 58-motor bracket; 159-guide plate; 161-fixed plate; 162-driving gear; 163-slideway; 164-guide gear; 165-guide wheel; 167-driving hole; 168-first guide hole; 169-second guide hole; 111-experimental chamber body; 112-soil ring knife; 113-upper chamber cover; 114-lower chamber cover; 115-cover body; 116-syringe connecting seat; 117-erosion product conduit; 118-limiting ring. DETAILED DESCRIPTION

[0053] The jet erosion test is an analytical method for quantifying erosion parameters. It aims to simulate the erosion effect of high-speed fluid on the surface of the target material through a high-speed jet formed by a high-pressure fluid (such as water or air). The particles or fluid molecules in the jet hit the surface of the material at high speed, thus causing erosion. By adjusting the pressure, speed, angle of the jet and the type and properties of the test material, the erosion effect under different conditions can be observed and analyzed, and then the critical shear force required to initiate erosion and the soil separation rate coefficient per unit of applied shear stress can be estimated using the principles of jet dynamics.

[0054] At present, when conducting soil jet erosion experiments, the existing experimental equipment is unable to achieve precise control of the jet source energy, and thus cannot form a more precise flow field, and cannot achieve regulation of small-energy-level jet sources, and thus cannot reach the critical point for erosion initiation, resulting in cumulative errors in the critical shear force measured in the experiment.

[0055] Based on the above content, this embodiment provides a soil submerged jet test device 100, which is an experimental device for accurately measuring the critical shear force of soil under immersion conditions;

[0056] In the prior art, the initial energy of the jet source is controlled by the water head height. The method of using a pressure gauge to measure the initial shear force of the jet source is relatively rough, and the pressure gauge used is usually of kPa level accuracy, while the critical shear force of the soil usually ranges from 0 to 10Pa. As a result, the existing experimental device cannot accurately control the initial shear force and initial energy of the jet source, resulting in excessively large system errors in the experiment.

[0057] The soil submerged jet experimental device 100 realizes precise closed-loop control of experimental parameters by introducing CNC servo motor control technology, solving the problem that the experimental device in the prior art cannot realize the formation of a small energy level jet source and the control of a small energy level stable flow field. The soil submerged jet experimental device 100 is an experimental device for soil submerged jet erosion experiments, which includes a jet experimental chamber 110. The jet experimental chamber 110 is used to accommodate experimental soil samples, provide necessary immersion conditions for the experiment, and monitor in real time the process of jet erosion of soil samples under the action of the jet source during the experiment. The immersion depth can also be controlled by replacing the jet experimental chamber 110 at different heights; a syringe-type jet mechanism 130, which is used to form a jet generating mechanism for a small energy level jet source; and a piston drive mechanism 150, which can be connected to a computer or a host computer through a single-chip microcomputer. The machine establishes communication control to realize the numerical control of the experimental device by the computer or the host computer, and then the parameters used in the experiment can be set by the computer, and the parameters are sent to the servo motor for execution. By applying pressure to the fluid in the syringe jet mechanism 130, a jet source with a small energy level is ejected, and a stable flow field with a small energy level is formed in the experimental sample observation mechanism. The jet erosion experiment is carried out on the soil sample through the stable flow field with a small energy level, and the parameters and execution results can be fed back to the computer, thereby realizing the numerical control of the jet source and the jet energy, and achieving the experimental effect of accurately measuring the critical shear force of the soil under immersion conditions.

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0059] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0060] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0061] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0062] In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0063] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] Please refer to Figure 1-Figure 16 , this embodiment provides a soil submerged jet test device 100, the soil submerged jet test device 100 includes a jet test chamber 110, a syringe-type jet mechanism 130 and a piston drive mechanism 150;

[0065] The jet experiment chamber 110 is used to accommodate experimental soil samples; the syringe-type jet mechanism 130 is connected to the jet experiment chamber 110 and is used to accommodate liquid; the piston drive mechanism 150 is connected to the syringe-type jet mechanism 130 and is used to increase the pressure in the syringe-type jet mechanism 130 so that the liquid in the syringe-type jet mechanism 130 is ejected toward the jet experiment chamber 110 to form a jet source with a small energy level.

[0066] Please refer to Figure 1-Figure 16 The working principle of the soil submerged jet experimental device 100 is:

[0067] The soil submerged jet test device 100 is an experimental device for soil submerged jet erosion experiment, which includes a jet test chamber 110, a syringe-type jet mechanism 130 and a piston drive mechanism 150;

[0068] The jet test chamber 110 is used to accommodate the experimental soil samples, provide the necessary immersion conditions for the experiment, and monitor in real time the process of jet erosion of the soil samples under the action of the jet source during the experiment. The immersion depth can also be controlled by replacing the jet test chamber 110 at different heights.

[0069] The syringe-type jet mechanism 130 is connected to the jet experiment chamber 110 and is used to contain liquid; the piston drive mechanism 150 is connected to the syringe-type jet mechanism 130 and is used to increase the pressure in the syringe-type jet mechanism 130 so that the liquid in the syringe-type jet mechanism 130 is ejected toward the jet experiment chamber 110 to form a jet source with a small energy level; thus, a jet generating mechanism of a jet source with a small energy level can be formed by the syringe-type jet mechanism 130 and the piston drive mechanism 150;

[0070] When configuring the piston drive mechanism 150, it can establish communication control with the computer or host computer through the single-chip microcomputer to realize the numerical control of the experimental device by the computer or the host computer, and then the parameters used in the experiment can be set by the computer, and the parameters are sent to the servo motor for execution. By applying pressure to the fluid in the syringe jet mechanism 130, a jet source with a small energy level is ejected, and a stable flow field with a small energy level is formed in the experimental sample observation mechanism. The jet erosion experiment is carried out on the soil sample through the stable flow field with a small energy level, and the parameters and execution results can be fed back to the computer, thereby realizing the numerical control of the jet source and the jet energy size, and achieving the experimental effect of accurately measuring the critical shear force of the soil under immersion conditions.

[0071] In summary, during the use of the soil submerged jet experimental device 100, the piston drive mechanism 150 can establish communication control with the computer or the host computer, so that it can be used to accurately measure the critical shear force of the soil under immersion conditions. That is, the soil submerged jet experimental device 100 realizes precise closed-loop control of the experimental parameters by introducing CNC servo motor control technology, which solves the problem that the experimental device in the prior art cannot realize the formation of a small energy level jet source and the control of a small energy level stable flow field.

[0072] For further information, please refer to Figure 1-Figure 4 In this embodiment, when the syringe-type jet mechanism 130 is configured, it includes a syringe 131, a needle 132, a syringe stand 133, a connecting nut 134 and a connecting screw 135;

[0073] The syringe 131 is used to contain liquid, and both ends of the syringe 131 are connected to the needle 132 and the syringe stand 133 respectively, the connecting screw 135 is connected to the syringe stand 133, and the connecting nut 134 is connected to the connecting screw 135;

[0074] The needle 132 is used to communicate with the jet experiment chamber 110 and inject liquid into the jet experiment chamber 110 ; the syringe holder 133 is connected to the piston driving mechanism 150 via a connecting screw 135 .

[0075] Therefore, in this way, the piston 153 can be driven by the piston driving mechanism 150 to move in the syringe 131, thereby changing the pressure of the syringe 131, so that the liquid in the syringe 131 can be injected into the jet test chamber 110 at a preset pressure value when the needle 132 is extended into the jet test chamber 110, so as to realize the pressure control of the jet source.

[0076] In order to control the pressure of the relative movement of the piston 153 in the syringe 131, the present embodiment adopts a method of establishing communication control between the piston drive mechanism 150 and a computer or a host computer, so as to accurately measure the critical shear force of the soil under immersion conditions. That is, the soil submerged jet experimental device 100 realizes accurate closed-loop control of the experimental parameters by introducing the CNC servo motor control technology. For details, please refer to Figure 1-Figure 6 , the piston driving mechanism 150 includes a driving body 151, a movable rack 152, a piston 153 and a driving motor 154;

[0077] The movable rack 152 is movably connected to the driving body 151, and the piston 153 is connected to the movable end of the movable rack 152; the driving motor 154 is connected to the driving body 151, and is used to drive the movable rack 152 and the piston 153 to move relative to the driving body 151;

[0078] The driving body 151 is connected to the syringe frame 133, and the piston 153 is movably connected to the syringe 131; in the unactivated state, the piston 153 is located at the upper end of the syringe 131; in the activated state, the movable rack 152 moves at a uniform speed relative to the driving body 151 under the driving action of the driving motor 154, so that the piston 153 made of rubber material installed at the lower end of the movable rack 152 moves synchronously, pushing the fluid in the syringe 131 to move and eject from the needle 132 with a flat diameter, forming a jet source;

[0079] It should be noted that, in the above content, in order to control the movement of the piston 153, the present embodiment adopts setting the drive motor 154 as a servo motor, so that communication control can be established between the single chip microcomputer and the computer or the host computer, so that the numerical control servo motor control technology can be introduced, the parameters used in the experiment can be set by the computer, and the parameters are sent to the servo motor for execution. The servo motor drives the movable rack 152 to move, and the fluid in the syringe-type jet mechanism 130 is pressurized by the piston 153. The fluid is ejected from the needle 132 to form a jet source with a small energy level, thereby realizing the control of the drive motor 154, and then realizing the movement control of the piston 153, so as to realize the control of the pressure and flow rate of the liquid in the syringe 131 when it is injected into the jet experiment chamber 110, and then it can be used to accurately measure the critical shear force of the soil under immersion conditions. That is, the soil submerged jet experiment device 100 realizes accurate closed-loop control of the experimental parameters by introducing the numerical control servo motor control technology.

[0080] When configuring the driving body 151, its function is to install the aforementioned movable rack 152, piston 153 and driving motor 154, and to achieve docking with the syringe 131 of the syringe-type jet mechanism 130. Based on this, please refer to Figure 1-Figure 6 , the driving body 151 includes a motor base 155 and a guide rail base 156, and the motor base 155 is connected to the guide rail base 156;

[0081] Please refer to Figure 1-Figure 7 The motor base 155 is provided with a syringe rack connecting ear 157 and a motor bracket 158. The syringe rack connecting ear 157 is connected to the syringe rack 133 via a connecting screw 135. The driving motor 154 is connected to the motor bracket 158.

[0082] The movable rack 152 is slidably engaged with the guide rail base 156 .

[0083] Therefore, through the above structure, the syringe rack connecting ear 157 of the motor base 155 can be connected to the syringe rack 133, so as to achieve docking with the syringe rack 133, and then, the driving motor 154 is connected to the motor bracket 158 ​​to realize the transmission connection between the driving motor 154 and the movable rack 152.

[0084] For further information, please refer to Figure 1-Figure 10 In order to enable the movable rack 152 to slidably cooperate with the guide rail base 156, the guide rail base 156 includes a guide rail plate 159, a fixed plate 161 and a driving gear 162;

[0085] The guide plate 159 is connected to the motor base 155, and the guide plate 159 is formed with a slideway 163 that can slidably cooperate with the movable rack 152; the fixed plate 161 is connected to the side of the guide plate 159 away from the motor base 155;

[0086] The driving gear 162 is rotatably connected to the guide rail plate 159 , and the driving gear 162 is drivingly connected to the driving motor 154 and meshes with the movable rack 152 .

[0087] In this way, the driving motor 154 can be rotated through the driving gear 162, so that the movable rack 152 meshing with the driving gear 162 can move relative to the slide 163, thereby driving the piston 153 located in the syringe 131 to move, thereby changing the pressure in the syringe 131. It should be noted that the above-mentioned fixing plate 161 can play the role of closing the slide 163 to improve the stability of the structural installation.

[0088] That is, in the starting state, the driving motor 154 rotates, thereby driving the driving gear 162 to rotate, and driving the movable rack 152 meshing therewith to perform uniform linear motion. At the same time, the piston 153 installed on the movable rack 152 is pushed by the movable rack 152 to perform uniform linear motion. The piston 153 pushes the fluid in the syringe-type jet mechanism 130 to form a jet source in the jet experiment chamber 110, and a stable small-energy-level jet flow field is formed in the jet experiment chamber 110.

[0089] Furthermore, in order to guide the movement of the movable rack 152 in the slideway 163, improve the stability of its movement, and reduce the contact friction, the guide rail base 156 further includes a guide gear 164 and a guide wheel 165; the guide gear 164 and the guide wheel 165 are both rotatably connected to the guide rail plate 159, and the guide gear 164 is meshed with the movable rack 152, and the guide wheel 165 is in rolling contact with the smooth side surface of the movable rack 152. In this way, the smoothness of the movement of the movable rack 152 can be improved.

[0090] Please refer to Figure 1-Figure 10 On the basis of being equipped with the above-mentioned driving gear 162, guide gear 164 and guide wheel 165, in order to improve the convenience of its installation, the guide plate 159 is provided with a driving hole 167, a first guide hole 168 and a second guide hole 169;

[0091] The driving gear 162 is accommodated in the driving hole 167, and the guide gear 164 and the guide wheel 165 are accommodated in the first guide hole 168 and the second guide hole 169 respectively;

[0092] The driving hole 167 and the first guiding hole 168 are located on one side of the slideway 163 , and the second guiding hole 169 is located on the other side of the slideway 163 .

[0093] Based on the above structure, when configuring the jet test chamber 110, please refer to Figure 1-Figure 16The present embodiment adopts a jet test chamber 110 including a test chamber body 111, a soil ring knife 112, an upper chamber cover 113 and a lower chamber cover 114;

[0094] Both ends of the experiment chamber body 111 are open, and the soil ring knife 112 is accommodated in the experiment chamber body 111, and the upper chamber cover 113 and the lower chamber cover 114 are respectively threadedly connected to the two ends of the experiment chamber body 111;

[0095] Among them, sealing rings are provided at the connection between the upper chamber cover 113 and the lower chamber cover 114 and the experimental chamber body 111 ; the syringe-type jet mechanism 130 is connected to the jet experimental chamber 110 through the upper chamber cover 113 .

[0096] Thus, through the above-mentioned structural setting, the experimental soil can be collected through the soil ring knife 112, and then contained in the experimental chamber body 111, thereby forming a relatively stable and independent experimental scene, and then the experiment can be carried out by operating the above-mentioned syringe jet mechanism 130 and piston drive mechanism 150. It should be noted that the experimental chamber body 111, the upper chamber cover 113 and the lower chamber cover 114 can all be made of transparent materials that are convenient for staff to observe, and the soil ring knife 112 can be a 100cm3 universal soil ring knife 112, which is placed inside the experimental chamber body 111, and the bottom surface of the universal soil ring knife 112 is placed on the lower chamber cover 114 to obtain soil samples.

[0097] Based on the configuration of the above-mentioned jet test chamber 110, please refer to Figure 1-Figure 16 In this embodiment, a syringe-type jet mechanism 130 is connected to the jet test chamber 110 through an upper chamber cover 113. Based on this, the upper chamber cover 113 includes a cover body 115, a syringe connection seat 116 and an erosion product conduit 117;

[0098] The cover 115 is connected to the experimental chamber body 111, and the syringe connection seat 116 and the corrosion product conduit 117 are both connected to the cover 115 and communicated with the experimental chamber body 111;

[0099] The syringe connecting seat 116 is connected to the syringe 131 of the syringe-type jet mechanism 130 , and the syringe 131 is communicated with the experimental chamber body 111 ; the erosion product conduit 117 is used to guide out the erosion products in the experimental chamber body 111 .

[0100] Furthermore, on the basis of the above structure, a limiting ring 118 is disposed inside the syringe connecting seat 116 and abuts against the syringe 131 . The limiting ring 118 is used to limit the length of the syringe 131 extending into the syringe connecting seat 116 .

[0101] In summary, please refer to Figure 1-Figure 16 The steps of using the soil submerged jet experimental device 100 are as follows:

[0102] During use, the syringe-type jet mechanism 130 together with the piston drive mechanism 150 is pulled out from the base of the syringe 131.

[0103] Send a command to the drive motor 154 through the USB serial port of the computer, the drive motor 154 rotates forward to push the movable rack 152 to the bottom of the syringe 131, and the needle 132 is placed underwater. Send a command to the drive motor 154 through the USB serial port of the computer, the drive motor 154 rotates reversely to push the movable rack 152 to the upper part of the syringe 131, so that the syringe 131 absorbs the fluid required for the experiment;

[0104] Rotate the upper compartment cover 113, open the upper compartment cover 113, add water into the experimental compartment body 111 until it overflows, then buckle the upper compartment cover 113 back and tighten it;

[0105] Then, the syringe-type jet mechanism 130 together with the piston drive mechanism 150 are reinstalled on the base of the syringe 131. At this point, the experimental preparation is completed and the jet erosion experiment can be started;

[0106] A command is sent to the drive motor 154 through the USB serial port of the computer, so that the piston 153 pushes the fluid in the syringe 131 through the needle 132 to enter the experimental sample observation mechanism. In the process, the piston 153 performs a single sliding launch to eject the water flow in the syringe 131, realizing a single jet, fast experimental speed and small water demand.

[0107] Among them, the overall energy consumption of the device is very small, and it can work continuously for 8 hours in the field when using a 2000mAh lithium battery; the amount of water required for a single jet erosion experiment is 8mL, and at least 40 jet erosion experiments can be carried out in the field with 1L of water source; the device can download the experimental parameters set by the computer to the drive motor 154, that is, the upper computer chip of the servo motor to achieve the use without the computer, and the device can be used in the field with a laptop computer; it is easy to carry in field experiments, effectively solving the problem of the total volume of experimental equipment being too large and the inconvenience of layout and erection under field conditions in the prior art, and improving the flexibility and scope of application of the experiment.

[0108] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A soil submerged jet test device, characterized in that: The soil submerged jet test device comprises a jet test chamber, a syringe-type jet mechanism and a piston drive mechanism; The jet test chamber is used to accommodate the experimental soil sample; the syringe-type jet mechanism is connected to the jet test chamber and is used to accommodate liquid; the piston drive mechanism is connected to the syringe-type jet mechanism and is used to increase the pressure in the syringe-type jet mechanism so that the liquid in the syringe-type jet mechanism is ejected toward the jet test chamber to form a jet source with a small energy level; The syringe-type jet mechanism comprises a syringe, a needle, a syringe stand, a connecting nut and a connecting screw; The syringe is used to contain liquid, the two ends of the syringe are respectively connected to the needle and the syringe stand, the connecting screw is connected to the syringe stand, and the connecting nut is connected to the connecting screw; Wherein, the needle is used to communicate with the jet test chamber and inject liquid into the jet test chamber; the syringe holder is connected to the piston drive mechanism through the connecting screw; The piston driving mechanism comprises a driving body, a movable rack, a piston and a driving motor; The movable rack is movably connected to the driving body, and the piston is connected to the movable end of the movable rack; the driving motor is connected to the driving body and is used to drive the movable rack and the piston to move relative to the driving body; Wherein, the driving body is connected to the syringe frame, and the piston is movably connected to the syringe.

2. The soil submerged jet experimental device according to claim 1, characterized in that: The driving body comprises a motor base and a guide rail base, and the motor base is connected to the guide rail base; The motor base is provided with a syringe rack connecting ear and a motor bracket, the syringe rack connecting ear is connected to the syringe rack through the connecting screw, and the driving motor is connected to the motor bracket; The movable rack is slidably matched with the guide rail base.

3. The soil submerged jet experimental device according to claim 2 is characterized in that: The guide rail base includes a guide rail plate, a fixing plate and a driving gear; The guide rail plate is connected to the motor base, and the guide rail plate is formed with a slideway that can slidably cooperate with the movable rack; the fixed plate is connected to a side of the guide rail plate away from the motor base; The driving gear is rotatably connected to the guide rail plate, and the driving gear is transmission-connected to the driving motor and meshes with the movable rack.

4. The soil submerged jet experimental device according to claim 3 is characterized in that: The guide rail base also includes a guide gear and a guide wheel; the guide gear and the guide wheel are both rotatably connected to the guide rail plate, and the guide gear is meshed with the movable rack, and the guide wheel is in rolling contact with the smooth side surface of the movable rack.

5. The soil submerged jet experimental device according to claim 4, characterized in that: The guide rail plate is provided with a driving hole, a first guide hole and a second guide hole; The driving gear is accommodated in the driving hole, and the guide gear and the guide wheel are accommodated in the first guide hole and the second guide hole respectively; The driving hole and the first guide hole are located on one side of the slideway, and the second guide hole is located on the other side of the slideway.

6. The soil submerged jet test device according to any one of claims 1 to 5, characterized in that: The jet test chamber comprises a test chamber body, a soil ring knife, an upper chamber cover and a lower chamber cover; The two ends of the experimental bin body are open, and the soil ring knife is accommodated in the experimental bin body, and the upper bin cover and the lower bin cover are respectively threadedly connected to the two ends of the experimental bin body; Wherein, sealing rings are provided at the connection between the upper chamber cover, the lower chamber cover and the experimental chamber body; and the syringe-type jet mechanism is connected to the jet experimental chamber through the upper chamber cover.

7. The soil submerged jet test device according to claim 6, characterized in that: The syringe-type jet mechanism is connected to the jet experiment chamber through the upper chamber cover; The upper chamber cover comprises a cover body, a syringe connecting seat and an erosion product conduit; The cover is connected to the main body of the experimental chamber, and the syringe connection seat and the erosion product conduit are both connected to the cover and communicated with the main body of the experimental chamber; Wherein, the syringe connecting seat is connected to the syringe of the syringe-type jet mechanism, and the syringe is communicated with the experimental chamber body; the erosion product conduit is used to guide out the erosion products in the experimental chamber body.

8. The soil submerged jet test device according to claim 7, characterized in that: A limiting ring abutting against the syringe is arranged inside the syringe connecting seat, and the limiting ring is used to limit the length of the syringe extending into the syringe connecting seat.

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