Shield pile cutting model experiment device based on 3D printing

Abstract

The utility model discloses a shield pile cutting model experiment device based on 3D printing, which comprises an experiment frame body, a 3D printing assembly, a cutting assembly and a monitoring assembly, a 3D printing material box and a telescopic printing spray head are arranged on one side of the experiment frame body, and a nozzle of the telescopic printing spray head is located above the experiment frame body. The printing assembly is arranged on the experiment frame body, can move along the surface of the experiment frame body and is used for printing a pile body on the experiment frame body, the experiment frame body is further provided with a cutting assembly and a detection assembly, the cutting assembly is used for cutting the pile body, and the monitoring assembly is used for shooting the pile body cutting process of the cutting assembly and is used for experiment analysis; through the 3D printing material box and the telescopic printing spray head, the pile body can be directly arranged on the experiment frame body, then cutting is conducted through the cutting assembly, the cutting experiment can be completed, the pile body does not need to be moved to the experiment frame body, and therefore the experiment efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering simulation, and in particular to a shield pile cutting model experimental device based on 3D printing. Background Art

[0002] Nowadays, subway has become an indispensable means of transportation, and the demand for urban subway tunnel construction is increasing. In subway tunnel construction, shield method is a widely used construction method. There are more and more cases where shield machines in urban subway tunnel projects pass through the composite foundation piles of existing buildings. If the construction parameters are not set properly during the pile cutting process, it is easy to increase the safety risk of shield construction and aggravate the damage to the tool. Most of the existing experimental devices conduct experiments through scaled simulation to facilitate implementation and reduce costs.

[0003] However, the existing scaled simulation experiments generally involve first preparing the pile body on a production platform and performing maintenance, and then moving the pile body to a simulation experiment device for cutting simulation, which results in cumbersome simulation experiment steps and low simulation experiment efficiency.

[0004] In view of this, the existing technology still needs to be improved and developed. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present utility model is to provide a shield pile cutting model experimental device based on 3D printing, aiming to solve the problem of low efficiency of the simulation experiment caused by the need to move the pile body to the experimental cutting position in the existing scaled simulation experiment.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows:

[0007] A shield pile cutting model experimental device based on 3D printing, comprising an experimental frame, and also comprising:

[0008] A 3D printing material box, arranged on one side of the experimental frame, for storing printing materials;

[0009] A retractable printing nozzle is arranged on one side of the experimental frame; the retractable printing nozzle is connected to the 3D printing material box through a pipeline, and the nozzle of the retractable printing nozzle is located above the experimental frame and can move along the surface of the experimental frame;

[0010] A cutting assembly, arranged on the experimental frame, for cutting the pile body;

[0011] The monitoring component is arranged on the experimental frame and is used for photographing the process of the cutting component cutting the pile body.

[0012] Furthermore, the retractable printing nozzle comprises:

[0013] A multi-joint robot is arranged on one side of the experimental frame;

[0014] A nozzle is arranged at the top of the multi-joint robot; the nozzle is connected to the 3D printing material box through a pipeline.

[0015] Furthermore, the cutting assembly comprises:

[0016] A gantry frame is slidably arranged on the experimental frame;

[0017] A hydraulic connecting rod, arranged on the bottom wall of the gantry;

[0018] A mounting seat is arranged at the bottom of the hydraulic connecting rod; a tool is arranged inside the mounting seat;

[0019] The moving component is arranged on the gantry and is used for driving the gantry to move.

[0020] Furthermore, the mobile component includes:

[0021] A rack, arranged on the experimental frame;

[0022] A gear is rotatably arranged on the side wall of the gantry; the gear is meshed with the rack, a motor is coaxially arranged on one side of the gear, and the motor is arranged on the gantry.

[0023] Furthermore, the monitoring component includes:

[0024] Four cameras are arranged on the top of the experimental frame and are used to shoot the process of the cutting assembly cutting the pile body.

[0025] Furthermore, the 3D printing-based shield pile cutting model experimental device also includes:

[0026] An electric hydraulic rod is arranged on the side wall of the experimental frame;

[0027] A pressure plate is arranged on one side of the electric hydraulic rod; the pressure plate cooperates with the side wall of the pile body to squeeze the pile body.

[0028] Furthermore, two calipers are detachably provided on the upper surface of the experimental frame, and the two calipers are respectively located at two ends of the experimental frame and are used to fix the pile body.

[0029] Furthermore, debris collection boxes are respectively provided on two sides of the experimental frame perpendicular to the pile body.

[0030] Compared with the prior art, the beneficial effects of the utility model are:

[0031] In the utility model, a 3D printing material box and a retractable printing nozzle are arranged on one side of the experimental frame, the retractable printing nozzle is connected to the 3D printing material box through a pipeline, the nozzle of the retractable printing nozzle is located above the experimental frame, and can be moved along the surface of the experimental frame, and is used to print a pile body on the experimental frame. A cutting component and a detection component are also arranged on the experimental frame, the cutting component is used to cut the pile body, and the monitoring component is used to photograph the process of the cutting component cutting the pile body for experimental analysis; through the 3D printing material box and the retractable printing nozzle, the pile body can be directly set on the experimental frame, and then the cutting experiment can be completed by cutting through the cutting component, and there is no need to move the pile body to the experimental frame, thereby improving the experimental efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0033] Figure 2 It is a schematic diagram of the structure of the experimental frame of the utility model.

[0034] Figure 3 for Figure 2 A local enlarged schematic diagram of point A in the middle.

[0035] Figure 4 This is a schematic diagram of the caliper structure of the utility model.

[0036] The numbers in the figure indicate: 1. Experimental frame; 2. 3D printing material box; 21. Retractable printing nozzle; 3. Cutting assembly; 31. Gantry; 32. Hydraulic connecting rod; 33. Mounting seat; 34. Cutting tool; 4. Monitoring assembly; 41. Camera; 5. Electric hydraulic rod; 51. Pressure plate; 6. Caliper; 7. Pile. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In view of the shortcomings of the prior art, this embodiment provides a shield pile cutting model experimental device based on 3D printing, which can be specifically referred to as follows:

[0041] As attached Figure 1As shown, a shield pile cutting model experimental device based on 3D printing includes an experimental frame 1, a 3D printing material box 2, a retractable printing nozzle 21, a cutting component 3 and a monitoring component 4. The experimental frame 1 is used to be placed on the ground. A plane is provided inside the experimental frame 1 for placing a pile body 7. The 3D printing material box 2 and the retractable printing nozzle 21 are both provided on one side of the experimental frame 1. The retractable printing nozzle 21 is connected to the 3D printing material box 2 through a pipeline and is used to print the pile body 7 on the plane of the experimental frame 1. The nozzle of the retractable printing nozzle 21 is located above the experimental frame 1 and can be moved along the surface of the experimental frame 1. Under the action of the retractable printing nozzle 21, the nozzle can move in three axes (i.e., X, Y and Z axes). , so as to realize printing of a three-dimensional pile body 7 on the experimental frame 1. The experimental frame 1 is also provided with a cutting component 3 and a monitoring component 4. The cutting component 3 is used to cut the pile body 7 to simulate the scaled experiment of the shield tool 34 cutting the pile body 7. The monitoring component 4 is used to shoot the process of the cutting component 3 cutting the pile body 7 to facilitate subsequent experimental analysis, etc.; through the 3D printing material box 2 and the retractable printing nozzle 21, the pile body 7 can be directly set on the experimental frame 1, and then the cutting component 3 can be used to complete the cutting experiment, without moving the pile body 7 to the experimental frame 1, thereby improving the experimental efficiency; the retractable printing nozzle 21 can also be designed with different structures and different types of pile bodies 7 according to the needs of the experiment, so as to quickly realize the simulation experiment of different pile bodies 7.

[0042] As attached Figure 1 As shown, the retractable printing nozzle 21 includes a multi-joint robot and a nozzle, and the nozzle is connected to the 3D printing material box 2 through a pipe for spraying out the printed material; the pipe connecting the nozzle and the 3D printing material box 2 is arranged on the multi-joint robot, and through the movement of the multi-joint robot, the nozzle can be moved in three axes on the surface of the experimental frame 1, thereby realizing the printing of the pile body.

[0043] Specifically, the shield pile cutting model experimental device based on 3D printing also includes a computer controller, which is electrically connected to the 3D printing material box 2 and the retractable printing nozzle 21. By sending the drawing to the computer controller, the computer controller controls the 3D printing material box 2 and the retractable printing nozzle 21 to work and print the state corresponding to the drawing.

[0044] Furthermore, a ground rail is provided at the bottom of the multi-joint robot. The ground rail is provided on one side of the experimental frame 1 and can be arranged around the experimental frame 1. The multi-joint robot can be moved through the ground rail, which makes it more convenient to print piles of different sizes.

[0045] Furthermore, four material chambers are arranged inside the 3D printing material box 2, which are respectively a concrete material chamber, a metal material chamber, a rock material chamber and a curing material chamber. The pile body 7 is printed by using concrete material, metal material and rock material in cooperation with the retractable printing nozzle 21, and then the pile body 7 is cured by the curing material, and then the pile body 7 can be cut; the retractable printing nozzle 21 has four nozzles, which correspond to the four material chambers respectively.

[0046] As attached Figure 2 and attached Figure 3 As shown, the cutting assembly 3 includes a gantry 31, a hydraulic connecting rod 32, a mounting seat 33 and a moving assembly. The gantry 31 is arranged on the plane of the experimental frame 1. The bottom wall of the crossbeam in the middle of the gantry 31 is provided with a hydraulic connecting rod 32. The bottom of the hydraulic connecting rod 32 is provided with a mounting seat 33. A tool 34 is arranged inside the mounting seat 33. A driving motor is also provided on one side of the mounting seat 33. The driving motor is connected to the tool 34 and is used to drive the tool 34 to rotate.

[0047] The hydraulic connecting rod 32 can be electric, and the extension or shortening of the hydraulic connecting rod 32 can be controlled by sending a signal, so that the tool 34 at the bottom of the hydraulic connecting rod 32 contacts the pile body 7 and performs a cutting test on the pile body 7; by cooperating with the moving component of the hydraulic connecting rod 32, vertical and horizontal cutting tests of the tool 34 can be realized.

[0048] In one embodiment of the present application, the moving component includes a rack and a gear, the rack is arranged on the experimental frame 1, the gear is rotatably arranged on the side wall of the gantry 31, and a motor is coaxially arranged on one side of the gear, and the motor is fixedly arranged on the gantry 31; the gear is meshed with the rack, the motor drives the gear to rotate, and the gear moves along the rack, thereby moving the gantry 31 on the experimental frame 1.

[0049] In this embodiment, a slide rail is provided on the plane of the experimental frame 1, and a slider is provided at the bottom of the gantry 31. The slider cooperates with the slide rail to enable the gantry 31 to guide and slide.

[0050] As attached Figure 2 As shown, the monitoring component 4 includes four cameras 41 , which are arranged on the top of the experimental frame 1 and located at the four corners of the experimental frame 1 for photographing the process of the cutting component 3 cutting the pile body 7 .

[0051] The camera 41 is a DIC camera 41. The DIC camera 41 is a three-dimensional, full-field and contactless optical measurement system for measuring the contour, displacement, vibration and strain of any material object. The principle is to use the camera 41 to capture the digital speckle image of the surface of the measured plane object before and after deformation, and then obtain the displacement of each point on the surface of the measured object by matching the corresponding image sub-areas in the digital speckle image before and after deformation. Before and after the object is deformed, the movement of the geometric points on its surface produces displacement. Through the relevant algorithm, the corresponding geometric points before and after the object is deformed are determined to obtain the displacement.

[0052] Furthermore, in the prior art, a plurality of strain gauges are arranged on the pile body 7 to measure the stress change when the pile body 7 is cut. The plurality of strain gauges are not only troublesome to install, but also generate a large number of connecting wires, which affect the experiment. However, by adopting the DIC camera 41, not only can the stress change when the pile body 7 is cut be accurately analyzed by photographing the cutting process, but also the installation and disassembly are convenient. Meanwhile, in the prior art, the tool 34 needs to be docked with the surface of the pile body 7. The prior art adopts manual docking, and the distance between the tool 34 and the surface of the pile body 7 is manually observed. However, errors may occur during manual observation, resulting in inaccurate experimental data. However, by using the DIC camera 41 of the present application, the tool 34 and the pile body 7 can be displayed on the display screen, and by enlarging the docking point, high-precision docking can be achieved, thereby reducing errors and improving the accuracy of the experiment.

[0053] As attached Figure 2 As shown, the shield pile cutting model experimental device based on 3D printing also includes an electric hydraulic rod 5 and a pressure plate 51. Baffles are also provided on the lateral sides of the experimental frame 1. The electric hydraulic rod 5 is arranged on the baffle on one side of the experimental frame 1, and a pressure plate 51 is provided on the side of the electric hydraulic rod 5 away from the baffle. The pressure plate 51 cooperates with the side wall of the pile body 7 to squeeze the pile body 7 and apply force to the pile body 7, so as to more realistically simulate the stress condition of the pile body 7; when the pressure plate 51 supports and squeezes the pile body 7, the side of the pile body 7 away from the pressure plate 51 contacts the baffle on the other side of the experimental frame 1.

[0054] As attached Figure 2 and attached Figure 4 As shown, two calipers 6 are detachably provided on the upper surface of the experimental frame 1, and the two calipers 6 are respectively located at the two ends of the experimental frame 1, and are used to support and fix the pile body 7; specifically, the calipers 6 are fixed to the experimental frame 1 by bolts, and the fixed position of the calipers 6 is arc-shaped, which is used to match the pile body 7; when conducting experiments on pile bodies 7 of different diameters, calipers 6 of different sizes can be replaced to fix the pile body 7, so as to facilitate cutting by the tool 34.

[0055] In one embodiment of the present application, debris collection boxes are respectively provided on both sides of the experimental frame 1 perpendicular to the pile body 7, for collecting waste residues after the tool 34 cuts the pile body 7; at the same time, the collected waste residues can be used to analyze the stress condition of the pile body 7.

[0056] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the solutions disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present solution. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

Claims

1. A shield pile cutting model experimental device based on 3D printing, comprising an experimental frame, characterized in that: Also includes: A 3D printing material box, arranged on one side of the experimental frame, for storing printing materials; A retractable printing nozzle is arranged on one side of the experimental frame; the retractable printing nozzle is connected to the 3D printing material box through a pipeline, and the nozzle of the retractable printing nozzle is located above the experimental frame and can move along the surface of the experimental frame; A cutting assembly, arranged on the experimental frame, for cutting the pile body; The monitoring component is arranged on the experimental frame and is used for photographing the process of the cutting component cutting the pile body.

2. A shield pile cutting model experimental device based on 3D printing according to claim 1, characterized in that: The retractable printing nozzle comprises: A multi-joint robot is arranged on one side of the experimental frame; A nozzle is arranged at the top of the multi-joint robot; the nozzle is connected to the 3D printing material box through a pipeline.

3. The shield pile cutting model experimental device based on 3D printing according to claim 1 is characterized in that: The cutting assembly comprises: A gantry frame is slidably arranged on the experimental frame; A hydraulic connecting rod, arranged on the bottom wall of the gantry; A mounting seat is arranged at the bottom of the hydraulic connecting rod; a tool is arranged inside the mounting seat; The moving component is arranged on the gantry and is used for driving the gantry to move.

4. The 3D printing-based shield pile cutting model experimental device according to claim 3, characterized in that: The mobile assembly comprises: A rack, arranged on the experimental frame; A gear is rotatably arranged on the side wall of the gantry; the gear is meshed with the rack, a motor is coaxially arranged on one side of the gear, and the motor is arranged on the gantry.

5. The shield pile cutting model experimental device based on 3D printing according to claim 1, characterized in that: The monitoring components include: Four cameras are arranged on the top of the experimental frame and are used to shoot the process of the cutting assembly cutting the pile body.

6. The shield pile cutting model experimental device based on 3D printing according to claim 1, characterized in that: The 3D printing-based shield pile cutting model experimental device also includes: An electric hydraulic rod is arranged on the side wall of the experimental frame; A pressure plate is arranged on one side of the electric hydraulic rod; the pressure plate cooperates with the side wall of the pile body to squeeze the pile body.

7. The shield pile cutting model experimental device based on 3D printing according to claim 1, characterized in that: The upper surface of the experimental frame is detachably provided with two calipers, which are respectively located at two ends of the experimental frame and are used to fix the pile body.

8. The 3D printing-based shield pile cutting model experimental device according to claim 1, characterized in that: Debris collection boxes are respectively arranged on two sides of the experimental frame that are perpendicular to the pile body.

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