Portable TBM hob abrasion loss automatic detection device

Abstract

The utility model discloses a portable TBM hob abrasion loss automatic detection device which comprises a measuring tool and a measuring host, the measuring tool comprises a caliper gauge and a connecting shell, the first end of the caliper gauge is provided with a clamping groove corresponding to a hob, the two sides of the second end of the caliper gauge are both provided with racks, locking gears are rotatably connected in the two sides of the connecting shell, and the locking gears are connected with the measuring host. The rack is meshed with a locking gear, stop blocks are further slidably connected to the two sides of the connecting shell, and a locking groove is formed in the periphery of the locking gear; the measuring host comprises a host shell and a distance measuring module, the end part of the host shell is provided with a clamping groove and a measuring bump, and the distance measuring module is mounted in the measuring bump; the connecting shell is provided with a measuring groove corresponding to the measuring protruding block, and the second end of the connecting shell is further provided with a clamping block corresponding to the clamping groove. According to the device, corresponding caliper gauges can be quickly replaced according to different hob models, the abrasion loss of a cutter can be quickly and accurately measured and recorded in an automatic detection mode, and the detection work efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield tunneling equipment detection, in particular to a portable TBM cutter wear automatic detection device. Background Art

[0002] During TBM construction, the cutter rings wear very quickly. When the surrounding rock is stable, it's necessary to enter the TBM cutterhead almost daily to measure and record cutter wear. This allows for timely monitoring of cutter wear, and any cutters whose ring wear reaches the replacement standard must be promptly replaced and repaired. Failure to promptly replace the cutter will cause TBM excavation difficulties, increase stress on the cutter, and cause damage. Therefore, inspecting and replacing the cutter in a timely manner is key to ensuring smooth excavation and reducing tool consumption. Currently, the method for inspecting TBM cutter ring wear is for a person to enter the cutterhead and use a simple inspection caliper to read and record the readings of each cutter on the cutterhead. However, the environment inside the cutterhead is extremely harsh, with high temperature, high humidity, and poor lighting. Manual readings are prone to errors, and it's difficult to ensure that the measured data fully corresponds to each cutter on the cutterhead. This can lead to problems such as inaccurate statistical data and incorrect tool replacement.

[0003] Chinese patent publication number CN109764798A discloses a device for detecting the wear of a roller cutter. The invention embeds a detection module on the cutter holder and sets it opposite to the roller cutter blade. The detection module sends a detection signal, which is converted into a feedback signal when the blade changes. The processing module determines the wear of the roller cutter based on the feedback signal. The invention measures the wear of the roller cutter by installing a fixed signal detection device on the cutter head of the shield machine and collecting changes in the roller cutter signal. Currently, some parts of the shield machine are equipped with this device when they leave the factory, but during use, the sensing device often malfunctions due to being in a humid environment for a long time. At the same time, soil adhering to the sensing device will also affect the measurement accuracy. In actual use, the accuracy rate of this method is only 80% in the early stage. After a period of use, the accuracy rate will drop significantly, making it difficult to meet the accuracy requirements for roller cutter wear detection. Currently, users basically still use manual detection.

[0004] Chinese Patent Publication No. CN107300369A discloses a patented shield / TBM cutter wear measurement device and method. The upper end of the measuring head is fixed to a vertical slider, which can move up and down along a guide rail. The vertical slider is fixed to a horizontal slider. This design allows the measuring head to move along the contour of the cutter and contact different positions on the cutter. The displacement sensor on the measuring head will generate an electrical signal, and the displacement data will be displayed through a single-chip microcomputer, thereby measuring the amount of cutter ring wear. Although this method has high measurement accuracy and can map the shape of the cutting edge after cutter ring wear, the device is relatively complex in structure and large in size, making it unsuitable for use during shutdown measurements during underground excavation. It is inconvenient to install and takes a long time to disassemble and assemble, which will cause operators to work for too long in the harsh underground environment. In addition, the sliding device is prone to mud and sand intrusion and malfunctions.

[0005] Therefore, developing an automated and convenient hob wear detection device suitable for manual detection has good application prospects.

[0006] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art. Utility Model Content

[0007] The purpose of this utility model is to overcome the deficiencies of the prior art and provide a portable automatic detection device for TBM hob wear, which is used for daily opening to automatically measure and record the wear of the hob ring during the use of the TBM hob. The corresponding caliper can be quickly replaced according to different hob models. Through automated detection, it can quickly and accurately measure and record the tool wear in an environment with high temperature, high humidity and poor light, thereby improving the efficiency of detection work, reducing the labor intensity of employees, and eliminating the problem of errors often occurring in manual readings.

[0008] In order to achieve the above-mentioned object, the utility model provides a portable TBM cutter wear automatic detection device, comprising a measuring tool and a measuring host, wherein the measuring tool comprises a caliper and a connecting shell, a first end of the caliper is provided with a slot corresponding to the cutter, and two sides of the slot are respectively provided with support rods, and two sides of the second end of the caliper are provided with racks, and the two sides of the connecting shell are rotatably connected to the locking gear, and the rack is meshed with the locking gear, and the two sides of the connecting shell are also slidably connected to stop blocks, and the outer periphery of the locking gear is provided with a locking groove, and the stop block can be slidably engaged in the locking groove to lock and limit the rotation of the locking gear;

[0009] The measuring host includes a host housing and a ranging module. The end of the host housing is provided with a snap-in groove and a measuring protrusion, and the ranging module is installed in the measuring protrusion; the connecting shell is provided with a measuring groove corresponding to the measuring protrusion, and the second end of the connecting shell is also provided with a snap-in block corresponding to the snap-in groove.

[0010] Furthermore, a guide column is provided on one side of the locking gear, and two guide grooves are provided on the connecting shell near the guide column. The guide groove is closed at one end close to the stop block and open at one end away from the stop block. The guide column is slidably connected in the guide groove to limit the rotation of the locking gear within a preset range.

[0011] Furthermore, a sliding groove is provided on the connecting shell, and the stop block is slidably connected in the sliding groove. A fixing seat is provided on the side wall of the connecting shell, and a first end of a spring is fixedly sleeved on the fixing seat, and the second end of the spring is fixedly connected to the stop block.

[0012] Furthermore, a shifting groove is provided in the slide groove and passes through the surface of the connecting shell. A shifting key is provided on one side of the stop block, and the shifting key is slidably connected in the shifting groove.

[0013] Furthermore, the distance measuring module includes an ultrasonic distance measuring sensor and an eddy current distance measuring probe, a mainboard is also installed in the host housing, and the ultrasonic distance measuring sensor is electrically connected to the mainboard.

[0014] Furthermore, a preamplifier is installed in the host housing, and the preamplifier is electrically connected to the eddy current ranging probe and the mainboard respectively.

[0015] Furthermore, an RFID reading module is provided in the main housing to read the information in the RFID tag on the hob.

[0016] Furthermore, a power module is provided in the host housing, and the power module is electrically connected to the main board and the RFID reading module respectively.

[0017] The above solution of the utility model has the following beneficial effects:

[0018] The portable automatic detection device for TBM cutter wear provided by the utility model has a measuring tool connected to the measuring main unit by a concave-convex mortise and tenon structure. When measuring cutter rings of different shapes, the measuring tool can be quickly replaced to achieve good flexibility and compatibility. At the same time, the caliper also adopts a split design. The detection caliper is locked and released by a gear locking device, which enables free replacement of the caliper on the measuring tool, further improving the speed and convenience of replacement.

[0019] The measuring host uses the eddy current distance measurement module on the testing equipment to measure the distance between the hob cutter ring and the probe. The ultrasonic distance sensor on the equipment performs a secondary distance measurement, thus achieving automatic detection. The dual-probe design improves measurement accuracy and prevents equipment from becoming unusable if a single probe fails. This automated measurement method allows for easy, rapid, and accurate measurement and recording of tool wear in high-temperature, high-humidity, and low-light environments, improving inspection efficiency, reducing employee workload, and eliminating the errors that often occur with manual readings.

[0020] Other beneficial effects of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of the measuring tool of the present utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the connection housing of the present invention;

[0024] Figure 4 This is a schematic diagram of the locking gear structure of the utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the measurement host of the present utility model;

[0026] Figure 6 This is a schematic diagram of the detection device of the present invention used to detect the wear of the hob.

[0027] [Description of Reference Numerals]

[0028] 1-caliper; 101-support rod; 102-rack; 2-connecting housing; 201-clamping block; 202-measuring slot; 203-guide slot; 204-slide slot; 205-fixed seat; 3-locking gear; 301-guide column; 302-locking slot; 4-stop block; 5-spring; 6-ultrasonic ranging sensor; 7-eddy current ranging probe; 8-host housing; 801-clamping slot; 802-measuring bump; 9-proximitor; 10-mainboard; 11-RFID reading module; 12-power module. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The various specific technical features and embodiments described in the specific embodiments can be combined in any suitable manner unless there is any contradiction. For example, different embodiments can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features / embodiments in the present invention will not be described separately.

[0030] It should be noted that the terms "setting" and "connecting" should be understood in a broad sense. For example, they can be directly set, installed, or connected, or they can be indirectly set or connected through a central component or a central structure. In addition, the orientations or positional relationships indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. in the present invention are based on the orientations or positional relationships shown in the drawings or the conventional placement state or usage state. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure, feature, device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0031] like Figures 1-6 As shown, this embodiment provides a portable automatic detection device for TBM cutter wear, including a measuring tool and a measuring host. The measuring tool includes a caliper 1 and a connecting shell 2. The first end of the caliper 1 is provided with a slot corresponding to the cutter, and support rods 101 are provided on both sides of the slot. Different calipers 1 are required to adapt to different cutter shapes. When the caliper 1 is placed on the cutter ring of the cutter, the support rods 101 on both sides will abut against the two sides of the cutter ring, and the cutter ring will be snapped into the slot of the caliper 1. The thickness of the cutter ring of an unworn cutter will be consistent with the depth of the slot of the caliper 1. Racks 102 are provided on both sides of the second end of the caliper 1. The two sides of the connecting shell 2 are rotatably connected to the locking gears 3. The racks 102 mesh with the locking gears 3. The caliper 1 is detachably connected to the connecting shell 2 through the meshing of the racks 102 and the locking gear 3, making it easy to replace the caliper 1.

[0032] Furthermore, stoppers 4 are slidably connected to both sides of the connecting housing 2, and locking grooves 302 are provided on the outer periphery of the locking gear 3. When the caliper 1 is engaged with the locking gear 3 via the rack 102 and the locking gear 3 into the connecting housing 2, the stoppers 4 will slide and engage into the locking grooves 302 to lock and restrict the rotation of the locking gear 3, thereby achieving a fast and stable installation and fixation of the connecting housing 2 and the caliper 1, facilitating quick installation when the caliper is damaged or needs to be replaced with another model. Specifically, a sliding groove 204 is further provided on the connecting housing 2, and the stoppers 4 are slidably connected to the sliding grooves 204. A fixing seat 205 is provided on the side wall of the connecting housing 2. The fixing seat 205 is fixedly sleeved with the first end of a spring 5, and the second end of the spring 5 is fixedly connected to the stoppers 4. Furthermore, a guide post 301 is provided on one side of the locking gear 3. Two guide grooves 203 are provided on the side of the connecting housing 2 near the guide post 301. The guide grooves 203 are closed at one end near the stop block 4 and open at the end away from the stop block 4. The guide post 4 is slidably connected in the guide grooves 203 to limit the rotation of the locking gear 3 within a preset range. When the caliper 1 is installed, the insertion of the caliper 1 drives the locking gear 3 to rotate, and when the locking gear 3 rotates, it also drives the guide post 301 to slide in the guide grooves 203. When the caliper 1 is snapped into place, the guide post 301 just reaches the closed end of one of the guide grooves 203, which can prevent the locking gear 3 from rotating further. At the same time, the locking groove 302 is just aligned with the stop block 4 at this time. When the stop block 4 is pushed by the spring 5, it snaps into the locking groove 302, fixing the locking gear 3, and thus effectively fixing the caliper 1 to the connecting housing 2.

[0033] In this embodiment, a pull-out slot extending through the surface of the connecting housing 2 can be provided within the slide groove 204, and a pull-out key can be provided on a side of the stop block 4 adjacent to the pull-out slot. The pull-out key is slidably connected within the pull-out slot. When the caliper 1 needs to be removed, the pull-out key is driven to slide the stop block 4 out of the locking slot 302, thereby releasing the rotation restriction on the locking gear 4. The caliper 1 can then be slid out of the connecting housing 2 for removal.

[0034] The gear locking mechanism is used to lock and release the detection caliper. Compared with the commonly used locking methods of buckles and latches, the device locks more firmly, is not easy to fall off, and is more convenient to replace.

[0035] Furthermore, the measuring host includes a host housing 8 and a distance measuring module. The end of the host housing 8 is provided with a snap-in groove 801 and a measuring protrusion 802, and the distance measuring module is installed in the measuring protrusion 802; the connecting shell 2 is provided with a measuring groove 202 corresponding to the measuring protrusion 802, and the second end of the connecting shell 2 is also provided with a snap-in block 201 corresponding to the snap-in groove 801. When the measuring tool is installed on the measuring host, it is only necessary to snap the snap-in block 201 into the snap-in groove 801. At this time, the measuring protrusion 802 is also snap-into the measuring groove 202. The distance measuring module in the measuring protrusion 802 can now be aligned with the snap-in groove on the caliper 1. When the caliper 1 is snapped onto the cutter ring of the hob, the distance measuring module can quickly and accurately measure the distance between it and the outer periphery of the cutter ring, and the wear amount of the cutter ring can be obtained. Preferably, the snap-in groove 8010 and the snap-in block 201 are dovetail grooves and dovetail tenons, respectively, which can realize a fast and stable connection between the host housing 8 and the connecting shell 2.

[0036] In this embodiment, the ranging module includes an ultrasonic ranging sensor 6 and an eddy current ranging probe 7. A mainboard 10 is also installed in the mainframe housing 8, and the ultrasonic ranging sensor 6 is electrically connected to the mainboard 10. A preamplifier 9 is also installed in the mainframe housing 8, and the preamplifier 9 is electrically connected to the eddy current ranging probe 7 and the mainboard 10, respectively. An RFID reader module 11 is also provided in the mainframe housing 8 to read the information in the RFID tag on the hob. A power module 12 is also provided in the mainframe housing 8, and the power module is electrically connected to the mainboard 10 and the RFID reader module 11, respectively, to supply power to the ultrasonic ranging sensor 6 and the eddy current ranging probe 7 through the mainboard 10.

[0037] Specifically, the host housing 8 consists of an upper shell and a lower shell, which is mainly used to install components such as the ranging module, main board, and power module. The upper and lower shells are connected by screws, and a rubber sealing strip is installed between the shells to enhance the waterproof ability.

[0038] Key References Figure 6 The wear detection process of the automatic detection device of the utility model is as follows: after entering the shield machine cutter head, first move the part of the detection device where the RFID reading module 11 is installed to the end face of the hob cutter shaft (RFIP is embedded in this position, which records the position number, position, original size and other related information of the hob), and read the information of the matching hob; then clean the dirt on the hob cutter ring, insert the caliper 1 of the measuring tool into the cutting edge of the cutter ring and close to the end face, the measurement starts, and the data will be recorded in the main board 10; then rotate the cutter ring, and complete the measurement according to the above steps again, measuring 3-4 positions for each hob. When detecting different hobs, you only need to quickly replace the measuring tool, and the caliper 1 on the measuring tool has been pre-installed on the ground. After completing the measurement of all hob data according to the above steps, return to the ground, clean the equipment, and then export the measurement data, and the entire detection process is completed.

[0039] During the entire measurement process, the personnel only need to wipe the dirt off the measuring position of the hob, then perform hob RFID identification, and then insert the caliper into the cutter ring to automatically complete the measurement and storage of the data. After the measurement, the computer is connected to automatically export the data. The original manual reading and recording of measurement data, recording the cutter number and installation position, and manual input of data on the computer after the measurement are all replaced by the equipment of the present invention. The entire measurement process is simple and easy, with a high degree of automation. The accuracy and efficiency of the detection are greatly improved, which greatly reduces the working time and intensity of employees in high temperature, high humidity and poor light environments, eliminates the influence of human factors on the detection results and the occurrence of tool replacement errors, and is more convenient to carry than the currently commonly used measuring equipment, and has strong adaptability to different measurement environments.

[0040] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A portable TBM cutter wear automatic detection device, characterized in that: The measuring tool comprises a measuring tool and a measuring host, wherein the measuring tool comprises a caliper (1) and a connecting shell (2), a first end of the caliper (1) is provided with a slot corresponding to a hob, and two sides of the slot are provided with support rods (101), two sides of the second end of the caliper (1) are provided with racks (102), the two sides of the connecting shell (2) are internally connected to the locking gear (3), the racks (102) are meshed with the locking gear (3), and the two sides of the connecting shell (2) are also slidably connected to stop blocks (4), the outer periphery of the locking gear (3) is provided with a locking slot (302), and the stop block (4) can be slidably engaged in the locking slot (302) to lock and limit the rotation of the locking gear (3); The measuring host comprises a host housing (8) and a distance measuring module, wherein an end portion of the host housing (8) is provided with a snap-fitting groove (801) and a measuring protrusion (802), and the distance measuring module is installed in the measuring protrusion (802); a measuring groove (202) corresponding to the measuring protrusion (802) is provided on the connecting housing (2), and a snap-fitting block (201) corresponding to the snap-fitting groove (801) is further provided at the second end of the connecting housing (2).

2. The portable TBM cutter wear automatic detection device according to claim 1 is characterized in that: A guide column (301) is provided on one side of the locking gear (3), and two guide grooves (203) are provided on the connecting housing (2) on a side close to the guide column (301). The guide grooves (203) are closed at one end close to the stop block (4) and open at one end away from the stop block (4). The guide column (301) is slidably connected in the guide grooves (203) to limit the rotation of the locking gear (3) within a preset range.

3. The portable TBM cutter wear automatic detection device according to claim 1 is characterized in that: The connecting shell (2) is further provided with a sliding groove (204), the stop block (4) is slidably connected in the sliding groove (204), a fixing seat (205) is provided on the side wall of the connecting shell (2), a first end of a spring (5) is fixedly sleeved on the fixing seat (205), and the second end of the spring (5) is fixedly connected to the stop block (4).

4. The portable TBM cutter wear automatic detection device according to claim 3 is characterized in that: A shifting groove penetrating the surface of the connecting shell (2) is provided in the sliding groove (204), and a shifting key is provided on one side of the stop block (4), and the shifting key is slidably connected in the shifting groove.

5. The portable TBM cutter wear automatic detection device according to claim 1 is characterized in that: The distance measuring module comprises an ultrasonic distance measuring sensor (6) and an eddy current distance measuring probe (7); a mainboard (10) is also installed in the mainframe housing (8); and the ultrasonic distance measuring sensor (6) is electrically connected to the mainboard (10).

6. The portable TBM cutter wear automatic detection device according to claim 5 is characterized in that: A preamplifier (9) is also installed in the host housing (8), and the preamplifier (9) is electrically connected to the eddy current ranging probe (7) and the main board (10) respectively.

7. The portable TBM cutter wear automatic detection device according to claim 6 is characterized in that: An RFID reading module (11) is also provided in the main housing (8) to read the information in the RFID tag on the hob.

8. The portable TBM cutter wear automatic detection device according to claim 7, characterized in that: A power module (12) is also provided in the host housing (8), and the power module (12) is electrically connected to the mainboard (10) and the RFID reading module (11) respectively.

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