A test device for testing the cutting resistance of rake teeth cutting soil under different cutting conditions

Abstract

This utility model relates to a test device for testing the cutting resistance of soil under different cutting conditions using rake teeth. It includes a cutting system, a soil container, and an electrically operated lifting base. The cutting system is used to conduct cutting experiments on the experimental soil in the soil container at different cutting angles and depths. It includes a support base, an electric push rod, a cutting force sensor, and rake teeth. The electric push rod is mounted on the support base, and the cutting force sensor is located between the electric push rod and the rake teeth, connected to both. The cutting force sensor measures the cutting resistance of the rake teeth. The soil container is mounted on the electrically operated lifting base and is detachable. The electrically operated lifting base is used to vertically raise and lower the soil container. This utility model enables testing the cutting resistance under different cutting conditions, providing an effective test device for testing the cutting resistance of soil under different cutting angles and depths, and providing a theoretical basis for rake tooth design and the formulation of dredging engineering construction processes.

Description

Technical Field

[0001] This utility model belongs to the field of dredging engineering technology, and in particular relates to a test device for testing the cutting resistance of rake teeth cutting soil under different cutting conditions. Background Technology

[0002] In dredging projects, trailing suction hopper dredgers use the teeth of their scraper heads to break and cut the soil. Testing the cutting resistance of these teeth under different cutting depths and angles when cutting different soil types provides a theoretical basis for the design of the scraper heads and teeth, as well as the development of cutting techniques for different soil types. Currently, there is a lack of experimental equipment for testing the cutting resistance of scraper teeth under different cutting conditions. Therefore, an experimental device is needed to study the cutting resistance of scraper teeth cutting soil under different cutting conditions. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a test device for testing the cutting resistance of rake teeth cutting soil under different cutting conditions. This test device has a simple structure, is easy to operate, and can be used for research on rake tooth cutting resistance testing. By selecting rake teeth at different angles, controlling the travel speed and stroke of the electric push rod, and adjusting the height of the electric lifting base, the cutting resistance of rake teeth under different cutting conditions can be tested indoors, providing a theoretical basis for the design of rake heads and teeth and the formulation of dredging engineering construction techniques.

[0004] This invention is implemented as follows: a test device for testing the cutting resistance of soil under different cutting conditions using rake teeth, comprising a cutting system, a soil container, and an electric lifting base; the cutting system is used to conduct cutting experiments on the experimental soil in the soil container at different cutting angles and depths, and includes a support base, an electric push rod, a cutting force sensor, and rake teeth. The electric push rod is mounted on the support base, and the cutting force sensor is located between the electric push rod and the rake teeth, and is connected to both the electric push rod and the rake teeth respectively. The cutting force sensor is used to measure the cutting resistance of the rake teeth; the soil container is mounted on the electric lifting base and is detachable; the electric lifting base is used to drive the soil container to move vertically.

[0005] In the above technical solution, preferably, the traveling speed of the electric push rod can be set, and the maximum stroke can cover the length of the soil container.

[0006] In the above technical solution, preferably, the type and angle of the rake teeth can be changed.

[0007] In the above technical solution, preferably, the support base has multiple sets of mounting connection blocks arranged horizontally side by side on its platform, and each set of mounting connection blocks can be equipped with an electric push rod.

[0008] In the above technical solution, preferably, the soil container adopts a layered structure, with adjacent layers connected by bolts, and the side plates of each layer are detachable.

[0009] In the above technical solution, preferably, the electric lifting base achieves vertical lifting by means of a hydraulic rod.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are:

[0011] This utility model presents a test device for testing the cutting resistance of rake teeth cutting soil under different cutting conditions. It has a simple structure and is easy to operate. By replacing the rake teeth, the electric lifting base, and the detachable soil container, it can achieve layered cutting of soil with different cutting angles and cutting thicknesses. At the same time, it can achieve uniform speed and long-distance cutting tests through electric push rods. It provides a reliable test device for studying the cutting resistance of rake teeth cutting soil under different cutting conditions, and can conduct cutting resistance tests of rake teeth under different cutting angles and cutting depths. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the test device for testing the cutting resistance of rake teeth cutting soil provided in this embodiment of the utility model;

[0013] Figure 2 This is a schematic diagram of the cutting system provided in an embodiment of the present invention.

[0014] In the diagram: 1. Cutting system; 11. Support base; 12. Electric push rod; 13. Cutting force sensor; 14. Rake teeth; 2. Electric lifting base; 3. Soil container. Detailed Implementation

[0015] To further understand the invention content, features, and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings:

[0016] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "one," "two," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Example

[0019] like Figure 1 and Figure 2 As shown, this embodiment provides a test device for testing the cutting resistance of soil under different cutting conditions of rake teeth, including a cutting system 1, an electric lifting base 2, and a soil holding box 3.

[0020] The cutting system 1 is used to conduct cutting experiments on the experimental soil in the soil container 3 at different cutting angles and depths. It includes a support base 11, an electric push rod 12, a cutting force sensor 13, and rake teeth 14. The electric push rod 12 is bolted to the support base 11. The cutting force sensor 13 is located between the electric push rod 12 and the rake teeth 14, and is connected to the electric push rod 12 and the rake teeth 14 respectively by bolts. The cutting force sensor 13 is used to measure the cutting resistance when the rake teeth 14 cuts the soil. The electric lifting base 2 is used to drive the soil container to move vertically. The soil container 3 is mounted on the electric lifting base 2 and is detachable.

[0021] In a preferred embodiment, the travel speed of the electric push rod 12 can be set, and the maximum stroke can cover the length of the soil container 3, enabling long-distance uniform speed cutting of the soil. The maximum travel speed of the electric push rod 12 can reach 0.1 m / s, and the maximum stroke can reach 1.6 m.

[0022] In one preferred embodiment, the type and angle of the rake teeth 14 can be changed to achieve cutting experiments with different cutting angles.

[0023] In a preferred embodiment, the support base 11 has multiple sets of mounting blocks arranged side by side in the horizontal direction. Each set of mounting blocks can be equipped with an electric push rod 12, which can be used to perform multiple cutting experiments in the horizontal direction.

[0024] As a preferred embodiment, the soil container 3 adopts a layered structure, with adjacent layers connected by bolts, and the side plates of each layer can be disassembled, enabling layered soil cutting tests.

[0025] In a preferred embodiment, the electric lifting base 2 achieves vertical lifting via a hydraulic rod, and its lifting is controlled by the hydraulic rod, making operation and maintenance convenient.

[0026] In this embodiment:

[0027] 1) The structural dimensions and parameters of the main components of cutting system 1 are as follows:

[0028] Support base 11: 700mm long × 1200mm wide × 720mm high; The platform of support base 11 has three sets of mounting connection blocks arranged horizontally side by side. Each set of mounting connection blocks is equipped with an electric push rod. The spacing between two adjacent sets of mounting connection blocks is 262mm.

[0029] Main dimensions and parameters of electric linear actuator 12: Distance from center of electric linear actuator 12 to support base 11: 230mm; Rated thrust: 20000N; Rated speed: 0.1m / s; Motor power: 4kW; Stroke range: 0.1m~1.6m;

[0030] Main parameters of cutting force sensor 13: measuring range 0~30000N, sampling frequency 200Hz;

[0031] Main dimensions of rake teeth 14: 200mm long × 75mm wide; the angles of the three types of rake teeth are 30 degrees, 45 degrees and 60 degrees respectively.

[0032] 2) The main structural dimensions and parameters of the electric lifting base 2 are as follows:

[0033] Countertop dimensions: 1.5m long × 1.2m wide;

[0034] Vertical lifting distance range: 85mm~860mm;

[0035] Rated load: 1500kg.

[0036] 3) The main structural dimensions of the soil container 3 are as follows:

[0037] Internal dimensions of the soil container: 1.2m long × 1m wide × 0.6m high;

[0038] Height: 30cm / 2 layers per layer.

[0039] The specific implementation process of this utility model is as follows (taking the direction of the rake teeth cutting as the front-to-back direction, and the two sides of the rake teeth as the left-to-right direction):

[0040] (1) Fill the detachable soil container 3 with cutting test soil; remove the side panels on the front and rear sides of the soil container 3;

[0041] (2) The electric push rod 12 and the support base 11 are connected and installed at the rightmost installation position by bolts; the electric push rod 12 is connected and installed with the cutting resistance sensor 13 and the rake teeth 14 by bolts; the rake teeth 14 are selected with an angle of 45 degrees.

[0042] (3) Adjust the height of the electric lifting base 2. The height of the first cutting condition is set to 300mm. At this time, the height difference between the rake teeth 14 and the soil surface is 100mm, that is, the soil cutting depth is 100mm.

[0043] (4) Set the travel speed of the electric push rod 12 to 0.1 m / s; start the electric push rod 12 and conduct a cutting test. Test the cutting resistance value of the rake teeth 14 cutting the soil through the cutting force sensor 13.

[0044] (5) The electric push rod 12 and the support base 11 are connected and installed in the middle installation position and the leftmost installation position by bolts in sequence;

[0045] (6) Adjust the height of the electric lifting base 2. The heights of the second and third cutting conditions are set to 400mm and 500mm respectively. At this time, the height difference between the rake teeth 14 and the soil surface is 200mm and 300mm respectively, that is, the soil cutting depth is 200mm and 300mm respectively.

[0046] (7) Set the travel speed of the electric push rod 12 to 0.1 m / s; start the electric push rod 12 and conduct cutting tests for the second and third cutting conditions. Test the cutting resistance value of the rake teeth 14 cutting the soil through the cutting resistance sensor 13.

[0047] (8) Remove the left and right side panels of the first layer of the soil container 3, remove the first layer of soil, repeat the steps of the first layer of soil cutting test, and carry out the second layer of soil cutting test; by changing the rake teeth 14 at different angles (30 degrees and 60 degrees can be selected), adjust the height of the electric lifting base 2 to carry out soil cutting tests with different cutting depths.

[0048] This utility model presents a test device for testing the cutting resistance of rake teeth cutting soil under different cutting conditions. It has a simple structure and is easy to operate. It can realize the indoor testing of the cutting resistance of rake teeth cutting soil under different cutting conditions. It provides a reliable test device for studying the cutting resistance of rake teeth cutting soil under different cutting conditions. It can conduct cutting resistance tests of rake teeth under different cutting angles and cutting depths, and provide a theoretical basis for the design of rake heads and rake teeth and the formulation of dredging engineering construction technology.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A test apparatus for testing the cutting resistance of rake teeth cutting soil under different cutting conditions, characterized in that, The system includes a cutting system, a soil container, and an electrically operated lifting base. The cutting system is used to perform cutting experiments on the experimental soil in the soil container at different cutting angles and depths. It includes a support base, an electric push rod, a cutting force sensor, and rake teeth. The electric push rod is mounted on the support base, and the cutting force sensor is located between the electric push rod and the rake teeth, and is connected to both the electric push rod and the rake teeth respectively. The cutting force sensor is used to measure the cutting resistance of the rake teeth. The soil container is mounted on the electrically operated lifting base and is detachable. The electrically operated lifting base is used to drive the soil container to move vertically.

2. The test apparatus for testing the cutting resistance of rake teeth cutting soil under different cutting conditions according to claim 1, characterized in that, The travel speed of the electric push rod can be set, and the maximum stroke can cover the length of the soil container.

3. The test apparatus for testing the cutting resistance of rake teeth cutting soil under different cutting conditions according to claim 1, characterized in that, The type and angle of the rake teeth can be changed.

4. The test apparatus for testing the cutting resistance of rake teeth cutting soil under different cutting conditions according to claim 1, characterized in that, The support base has multiple sets of mounting blocks arranged horizontally side by side on its platform, and each set of mounting blocks can be equipped with an electric push rod.

5. The test apparatus for testing the cutting resistance of rake teeth cutting soil under different cutting conditions according to claim 1, characterized in that, The soil container adopts a layered structure, with adjacent layers connected by bolts, and the side panels of each layer are removable.

6. The test apparatus for testing the cutting resistance of rake teeth cutting soil under different cutting conditions according to claim 1, characterized in that, The electric lifting base achieves vertical lifting via a hydraulic rod.

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