Multifunctional comprehensive test device for shield scraper

Abstract

The invention discloses a multifunctional comprehensive test device for a shield scraper, and belongs to the technical field of shield construction. The device comprises a base and a testing machine structure arranged on one side of the base, wherein the testing machine structure at least comprises a support, a guide rail assembly arranged on the support, a first driving mechanism connected to the guide rail assembly and a cutter assembly connected to the guide rail assembly; the sample structure is arranged on the other side of the base and at least comprises a second driving mechanism arranged on the base, a sample piece connected to the second driving mechanism, a scrap collector arranged below the sample piece and a plurality of fixing rods arranged outside the sample piece; the control system is connected to the testing machine structure and the sample structure and at least comprises a sensor assembly connected to the cutter assembly, a computer connected to the sensor assembly and a switch connected to the computer. The testing machine structure simulates the rock breaking process of the scraper, the sample structure simulates rock soil, the control system monitors the state of the scraper in real time, data monitoring and analysis are carried out, and simulation of the real operation state of the shield scraper is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of shield construction, and in particular relates to a multifunctional comprehensive testing device for a shield scraper. Background Art

[0002] The shield machine is a large-scale complete set of equipment specially used for excavating underground tunnels. It has the advantages of high excavation efficiency, safety, and little impact on the surrounding environment. It is widely used in tunnel construction. The cutterhead is a key component of the shield machine. The cutterhead is equipped with different cutters according to different strata. In hard rock strata, disc-type roller cutters are used; when in soft soil or crushing soft rock, scrapers are configured, and both types of cutters are configured in soft and hard uneven strata. During the use of the cutter, due to long use time and hard strata, the cutter will wear. At present, some test benches for roller cutters have been developed and produced, but the performance detection device for scrapers has few functions, especially the factory quality inspection of scrapers lacks running-in inspection, and the cutter lacks effective quality monitoring measures when it enters the construction unit site. Many scraper wear monitoring devices are also difficult to be effectively tested. Therefore, it is necessary to develop a multifunctional comprehensive test device for shield scrapers.

[0003] When the shield machine is in the excavation mode, the cutterhead rotates to break the rock, and the scraper is fixed on the cutter seat, and only rotates with the cutterhead without rotating itself. Under the action of the thrust of the cutterhead, the cutterhead drives the cutter to cut the rock layer, forming a ring of furrows on the face. The scraper is used to excavate the soft soil layer or the slag after the roller cutter is broken, and the slag enters the slag trough along the front of the scraper. Therefore, the scraper has both cutting and loading functions. In some strata, the scraper will be reinforced with alloy sheets. The running-in detection of the scraper is very important, especially for the scraper with additional alloy sheets. Shield tools with qualified quality can be used for a long time. Tools with unqualified quality will bring higher construction costs and safety hazards to the construction. In addition, the status information of worn tools is unclear, which will cause trouble in judging the tool change time. Therefore, the running-in detection and status monitoring of the tools are very important.

[0004] However, the existing test equipment lacks effective running-in detection of scraper performance. Some cutters are directly used in engineering projects after a simple appearance inspection, which poses a great safety risk. In addition, the current scraper test bench does not consider the installation of the cutter status monitoring device. Therefore, it is necessary to develop a multifunctional comprehensive test device for shield scrapers. Summary of the invention

[0005] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides a multifunctional comprehensive testing device for shield scrapers.

[0006] The present invention adopts the following technical scheme: a multifunctional comprehensive testing device for shield scraper, comprising:

[0007] Base;

[0008] The testing machine structure is arranged on one side of the base; it at least comprises: a support arranged on the base, a guide rail assembly arranged on the support, a first driving mechanism connected to the guide rail assembly by transmission, and a tool assembly connected to the guide rail assembly by transmission;

[0009] The sample structure is arranged on the other side of the base, and at least comprises: a second driving mechanism arranged on the base, a sample piece connected to the second driving mechanism by transmission, a debris collector arranged on the lower side of the sample piece, and a plurality of fixing rods arranged on the outer side of the sample piece;

[0010] The control system is connected to the testing machine structure and the sample structure, and at least comprises: a sensor assembly connected to the tool assembly, a computer connected to the sensor assembly, and a switch connected to the computer.

[0011] Preferably, the guide rail assembly comprises: a movable guide rail disposed on the support, and a telescopic guide rail slidably connected to the movable guide rail.

[0012] Preferably, the moving guide rail runs in a horizontal direction, and the telescopic guide rail runs in a vertical direction.

[0013] Preferably, the first driving mechanism comprises: a servo motor slidably connected to the movable guide rail and transmission-connected to the telescopic guide rail, and a loading cylinder slidably connected to the movable guide rail and transmission-connected to the servo motor.

[0014] Preferably, the tool assembly comprises: a tool cylinder drivingly connected to the telescopic guide rail, a tool holder disposed in the tool cylinder, and a scraper mounted on the tool holder.

[0015] Preferably, the sensor assembly includes: a rotation speed sensor, a temperature sensor, a load sensor, and a wear sensor.

[0016] The invention provides a multifunctional comprehensive test device for shield scrapers, which can realize effective running-in detection of scraper performance and tool status monitoring through the simulation of the damage and excavation of the sample by the cutter. The installation diameter of the cutter is adjustable, and the running-in of cutters with different installation radii can be simulated. The rock breaking process of the scraper is simulated by the test machine structure, the sample structure simulates the rock and soil, and the speed, temperature, load and wear of the cutter are monitored in real time by the control system, and data monitoring and analysis are performed, so as to realize the simulation of the real running state of the shield scraper, including cutting soil and bearing load. Initial setting, install the sample, adjust the position and angle of the cutter assembly, and ensure that the contact position between the cutter and the sample is accurate. Start the test, start the servo motor and the loading cylinder through the computer, and drive the cutter assembly to perform cutting movement. Under the control of the moving guide rail and the telescopic guide rail, the cutter moves horizontally and vertically to simulate the cutting process under different cutting radii. Then data acquisition is performed, and the sensor assembly monitors the speed, temperature, load and wear of the cutter in real time, and the data is transmitted to the computer for processing and analysis. The debris generated during the cutting process is collected by the debris collector for subsequent analysis. The test is stopped by computer-controlled switch, and the collected data is analyzed to evaluate the tool performance and cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the partial structure of the present invention Figure 1 ;

[0019] Figure 3 It is a schematic diagram of the partial structure of the present invention Figure 2 .

[0020] In the accompanying drawings, the list of components represented by each reference numeral is as follows: base 1, specimen 2, debris collector 3, fixing rod 4, servo motor 5, movable guide rail 6, telescopic guide rail 7, knife barrel 8, scraper 9, speed sensor 10, temperature sensor 11, load sensor 12, wear sensor 13, support 14, loading cylinder 15, second drive mechanism 16, knife holder 17. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] A multifunctional comprehensive test device for shield scrapers, such as Figures 1 to 3As shown, it includes: a base 1, a test machine structure arranged on one side of the base 1, used to simulate the cutting process of the shield scraper 9, at least including: a support 14 arranged on the base 1, a guide rail assembly arranged on the support 14, a first drive mechanism connected to the guide rail assembly, and a tool assembly connected to the guide rail assembly; the tool assembly reserves multiple status sensor monitoring positions and interfaces; the sample structure is arranged on the other side of the base 1, used to provide the soil sample required for the test, at least including: a second drive mechanism 16 arranged on the base 1, a sample piece 2 connected to the second drive mechanism 16, a debris collector 3 arranged on the lower side of the sample piece 2, and a plurality of fixed rods 4 arranged on the outer side of the sample piece 2; the control system is connected to the test machine structure and the sample structure, used to realize data acquisition and control, at least including: a sensor assembly connected to the tool assembly, a computer connected to the sensor assembly, and a switch connected to the computer. The base 1 supports the sample piece 2 to ensure the stability and accurate position of the sample. The sample piece 2 provides the soil sample required for the test, which can be a cylinder or an annular belt, covering the tool cutting track. The rock and soil are simulated by pouring high-strength concrete or wear-resistant alloy. The debris collector 3 is arranged at the lower side of the sample 2, which can be disassembled and reused to collect the debris generated during the cutting process for subsequent analysis. The second driving mechanism 16 controls the radial movement of the sample 2 relative to the tool.

[0023] In a further embodiment, the guide rail assembly includes: a movable guide rail 6 disposed on a support 14, and a telescopic guide rail 7 slidably connected to the movable guide rail 6; the movable guide rail 6 runs in a horizontal direction to control the horizontal movement of the tool. The telescopic guide rail 7 runs in a vertical direction to control the vertical movement of the tool and the adjustment of the cutting radius.

[0024] In a further embodiment, the first driving mechanism includes: a servo motor 5 slidably connected to the moving guide rail 6 and transmission-connected to the telescopic guide rail 7, and a loading cylinder 15 slidably connected to the moving guide rail 6 and transmission-connected to the servo motor 5. The servo motor 5 provides high-precision speed control to drive the movement of the telescopic guide rail 7 and the tool assembly. The loading cylinder 15 provides a large force and stroke to ensure that the tool always bears a certain load during the cutting process.

[0025] In a further embodiment, the tool assembly includes: a tool cylinder 8 that is transmission-connected to the telescopic guide rail 7, which is a real tool cylinder 8, to achieve precise installation and movement of the tool; a tool holder 17 disposed in the tool cylinder 8 to ensure the stability and accuracy of the tool; a scraper 9 installed on the tool holder 17 to simulate the cutting process of a shield scraper 9, to bear the load and cut the soil sample.

[0026] In a further embodiment, the sensor assembly includes: a rotation speed sensor 10, a temperature sensor 11, a load sensor 12, and a wear sensor 13, which are used to ensure precise control of the cutting speed, evaluate the thermal effect during the cutting process, ensure that the tool always bears a certain load during the cutting process, and monitor the wear of the tool to provide data support for predictive maintenance.

[0027] During the cutting and excavation process of the shield machine, the cutters are distributed at multiple positions of the cutter disc, and the installation radius is unevenly distributed. When the scraper 9 cuts the soil, it will contact the soil and generate load. This test device can completely simulate the operating state of the real cutter. The working principle of this device is: initial setting, installing the sample 2, adjusting the position and angle of the tool assembly, and ensuring the accurate contact position between the tool and the sample. Start the test, start the servo motor 5 and the loading cylinder 15 through the computer, and drive the tool assembly to perform cutting movement. Under the control of the moving guide rail 6 and the telescopic guide rail 7, the tool moves horizontally and vertically to simulate the cutting process under different cutting radii. Then data collection is carried out, and the sensor assembly monitors the speed, temperature, load and wear of the tool in real time, and the data is transmitted to the computer for processing and analysis. The debris generated during the cutting process is collected by the debris collector 3 for subsequent analysis. The test is stopped by the computer control switch, and the collected data is analyzed to evaluate the tool performance and cutting effect.

[0028] A multifunctional comprehensive testing device for a shield scraper is provided and introduced in detail. It is worth noting that the above is only a preferred embodiment of the present invention and is not used to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, for those skilled in the art, they can still modify the technical details recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. Any equivalent replacements, modifications, etc. made within the core ideas and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional comprehensive testing device for shield scraper, characterized in that: include: Base; The testing machine structure is arranged on one side of the base; it at least comprises: a support arranged on the base, a guide rail assembly arranged on the support, a first driving mechanism connected to the guide rail assembly by transmission, and a tool assembly connected to the guide rail assembly by transmission; The sample structure is arranged on the other side of the base, and at least comprises: a second driving mechanism arranged on the base, a sample piece connected to the second driving mechanism by transmission, a debris collector arranged on the lower side of the sample piece, and a plurality of fixing rods arranged on the outer side of the sample piece; The control system is connected to the testing machine structure and the sample structure, and at least comprises: a sensor assembly connected to the tool assembly, a computer connected to the sensor assembly, and a switch connected to the computer.

2. A shield scraper multifunctional comprehensive testing device according to claim 1, characterized in that: The guide rail assembly comprises: a movable guide rail arranged on the support, and a telescopic guide rail slidably connected to the movable guide rail.

3. A shield scraper multifunctional comprehensive testing device according to claim 2, characterized in that: The moving guide rail runs in a horizontal direction, and the telescopic guide rail runs in a vertical direction.

4. A shield scraper multifunctional comprehensive testing device according to claim 3, characterized in that: The first driving mechanism includes: a servo motor slidably connected to the movable guide rail and transmission-connected to the telescopic guide rail, and a loading cylinder slidably connected to the movable guide rail and transmission-connected to the servo motor.

5. A shield scraper multifunctional comprehensive testing device according to claim 4, characterized in that: The tool assembly comprises: a tool cylinder drivingly connected to the telescopic guide rail, a tool seat arranged in the tool cylinder, and a scraper installed on the tool seat.

6. The shield scraper multifunctional comprehensive testing device according to claim 1 is characterized in that: The sensor assembly includes: a rotation speed sensor, a temperature sensor, a load sensor, and a wear sensor.

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