shield tail brush bending fatigue testing machine

Abstract

The application belongs to the technical field of shield machine application, and particularly relates to a shield tail brush bending fatigue testing machine. The shield tail brush bending fatigue testing machine comprises a rack and a workbench arranged on the top of the rack. A shield tail brush fixing seat is arranged on the workbench. A pressure sensor is arranged at the bottom of the shield tail brush fixing seat. The shield tail brush fixing seat is fixed on the workbench through the pressure sensor. The top surface of the shield tail brush fixing seat is arranged in an inclined manner. A shield tail brush fixing plate is detachably arranged on the top of the shield tail brush fixing seat. Shield tail brushes are welded on the shield tail brush fixing plate. A circulating pressurizing mechanism is further arranged on the rack. The shield tail brush fixing seat arranged on the rack cooperates with the circulating pressurizing mechanism to effectively simulate the scene of the shield tail brush in the actual use process, so that the real bending fatigue data of the shield tail brush is obtained, and reliable basis is provided for the improvement and innovation of the shield tail brush.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of shield machine application, and particularly relates to a shield tail brush bending fatigue testing machine. BACKGROUND

[0002] The shield machine, full name shield tunnel boring machine, is a special engineering machinery for tunneling. The modern shield tunneling machine integrates light, machine, electricity, liquid, sensing and information technology, has the functions of excavating and cutting soil and rock, conveying soil, assembling tunnel lining, measuring and guiding deviation, and involves geology, civil engineering, machinery, mechanics, hydraulic pressure, electricity, control, measurement and other disciplines. Moreover, it needs to be designed and manufactured according to different geologies, and has high reliability requirements. The shield tunneling machine has been widely used in subway, railway, highway, municipal, water and power tunnel engineering.

[0003] The shield tail brush is often used in soft soil layer tunnel construction and is an important accessory in shield equipment. It uses the gap formed by the steel wire after bending to inject a certain amount of grease filler between the shield and the segment to play a good sealing role, prevent underground water, outer soil and lining back grouting from flowing into the tunnel, and ensure the safety of tunneling and the smooth progress of the project.

[0004] Since the existing shield tail brush is generally set in an obtuse angle, its angle will change under stress, although it can be reset under the characteristics of the shield tail brush metal material, but long-term frequent bending will cause fatigue, and thus cannot be reset. Therefore, fatigue test is conducted on the shield tail brush to effectively determine the service life and fatigue resistance of the shield tail brush and provide help for the improvement of the shield tail brush. However, there is a lack of related equipment for the fatigue test of the shield tail brush. SUMMARY

[0005] The shield tail brush bending fatigue testing machine is designed rationally, has a simple structure, is convenient to process, and can effectively realize fatigue detection of the shield tail brush.

[0006] In order to achieve the above object, the technical scheme adopted by the present application is as follows: the present application provides a shield tail brush bending fatigue testing machine, which comprises a rack and a workbench arranged on the top of the rack, a shield tail brush fixing seat is arranged on the workbench, a pressure sensor is arranged at the bottom of the shield tail brush fixing seat, the shield tail brush fixing seat is fixed on the workbench through the pressure sensor, the top surface of the shield tail brush fixing seat is arranged obliquely, a shield tail brush fixing plate is detachably arranged on the top of the shield tail brush fixing seat, a shield tail brush is welded on the shield tail brush fixing plate, a circulating pressurizing mechanism is further arranged on the rack, the circulating pressurizing mechanism comprises a guide column arranged at the corner of the workbench and a fixing plate arranged on the top of the guide column, a pressurizing cylinder is arranged on the fixing plate, the power end of the pressurizing cylinder is arranged downward through the fixing plate, a lifting plate is connected to the power end of the pressurizing cylinder, a pressurizing seat is arranged at the bottom of the lifting plate, the pressurizing seat is arranged above the shield tail brush, the pressurizing seat comprises pressurizing plates arranged at intervals, a connecting shaft is arranged between the pressurizing plates, a pressurizing bearing is sleeved on the connecting shaft, the pressurizing bearing is arranged on the connecting shaft and protrudes from the bottom of the pressurizing plate, and a counter is further arranged on the rack.

[0007] Preferably, the pressurizing bearing is arranged above the raised end of the shield tail brush.

[0008] Preferably, a sensor support is arranged on one side of the fixing plate, an upper limit position sensor and a lower limit position sensor are arranged on the sensor support in an up-down arrangement, and the pressurizing stroke of the pressurizing seat is the distance between the upper limit position sensor and the lower limit position sensor.

[0009] Preferably, the upper limit position sensor and the lower limit position sensor are both diffuse reflection infrared sensors.

[0010] Preferably, a lower limit position support is arranged on the workbench, the lower limit position support is arranged below the lifting plate, an upper limit position support is arranged on the lifting plate, and the upper limit position support is arranged below the fixing plate.

[0011] Preferably, a through hole for the upper limit position support to pass through is arranged on the fixing plate, a gate mechanism for sealing the through hole is arranged on the fixing plate, the gate mechanism comprises a guide groove arranged at the bottom of the fixing plate, the guide groove is arranged on both sides of the through hole, a gate plate is arranged between the two guide grooves, a gate handle is arranged on the gate plate, the gate handle passes through the fixing plate, a guide groove for the gate handle to pass through and a limiting plate for locking the gate handle are arranged on the fixing plate, and the limiting plate is hingedly arranged with the fixing plate.

[0012] As preferred, the shield tail brush fixing plate comprises upper fixing plate, middle plate and lower fixing plate arranged in sequence along the inclined direction of the top surface of the shield tail brush fixing seat, and connecting slot holes are arranged on both sides of the upper fixing plate, the middle plate and the lower fixing plate, and the fixing seat is provided with fixing holes matched with the connecting slot holes.

[0013] As preferred, adjusting bolts are arranged on both sides of the middle plate, the adjusting bolts are arranged through the middle plate, and the adjusting bolts are arranged in contact with the upper fixing plate and the lower fixing plate respectively.

[0014] Compared with the prior art, the shield tail brush bending fatigue testing machine has the advantages and positive effects that,

[0015] 1. The shield tail brush bending fatigue testing machine is provided with a shield tail brush fixing seat arranged on the rack and matched with a cyclic pressurizing mechanism, so that the scene of the shield tail brush in actual use can be effectively simulated, and the real bending fatigue data of the shield tail brush can be obtained, thereby providing reliable basis for the improvement and innovation of the shield tail brush. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The shield tail brush bending fatigue testing machine provided for the embodiment 1 is shown in the structural schematic view.

[0018] Figure 2 The front view of the shield tail brush bending fatigue testing machine provided for the embodiment 1 is shown.

[0019] Figure 3 The structural schematic view of the shield tail brush fixing seat provided for the embodiment 1 is shown.

[0020] Figure 4 The structural schematic view of the lifting plate provided for the embodiment 1 is shown.

[0021] Figure 5 The structural schematic view of the shield tail brush bending fatigue testing machine provided for the embodiment 1 is shown.

[0022] In the above figures, 1, rack; 11, workbench; 12, pressure sensor; 13, counter; 2, shield tail brush fixing seat; 3, shield tail brush fixing plate; 31, upper fixing plate; 32, middle plate; 33, lower fixing plate; 34, connecting groove hole; 35, adjusting bolt; 4, shield tail brush; 5, circulating pressure mechanism; 51, guide column; 52, fixing plate; 53, pressure cylinder; 54, lifting plate; 55, pressure seat; 551, pressure plate; 552, connecting shaft; 553, pressure bearing; 6, sensor support; 61, upper limit sensor; 62, lower limit sensor; 7, upper limit support; 8, lower limit support; 9, gate mechanism; 91, guide groove; 92, gate plate; 93, door handle; 94, limit plate. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described below in conjunction with the drawings and examples. It should be noted that the examples of the present application and the features in the examples can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be practiced in other ways different from those described herein, therefore, the present application is not limited to the specific examples disclosed in the following description.

[0025] Example 1, as shown in the present embodiment is to provide a device capable of bending fatigue test for shield tail brush 4, in order to obtain real test data, and to provide help for the improvement of shield tail brush 4. Figures 1-5

[0026] To this end, the shield tail brush 4 bending fatigue testing machine provided by the present embodiment comprises a rack 1 and a workbench 11 arranged on the top of the rack 1, the rack 1 is composed of four columns to form a square frame structure, and the workbench 11 is a top plate arranged on the top of the column, in the present embodiment, the workbench 11 is also arranged in a square shape.

[0027] In order to better simulate the use of the field, the workbench 11 is provided with a shield tail brush fixing seat 2, the shield tail brush fixing seat 2 comprises a rectangular bottom plate and a side plate arranged on the bottom plate, the side plate is arranged along the long edge direction of the bottom plate, and a top plate is arranged on the top of the side plate, thus forming the structure of the shield tail brush fixing seat 2, in order to facilitate the bending of the shield tail brush 4, in the present embodiment, the top surface of the side plate is inclined, thus the top plate of the shield tail brush fixing seat 2 is also inclined, and the shield tail brush 4 itself is arranged in an obtuse angle, thus facilitating the pressing of the raised part and facilitating the bending thereof.

[0028] ​In order to accurately obtain the relevant pressure data, in the embodiment, the pressure sensor 12 is arranged at the bottom of the shield tail brush fixing seat 2. In order to make the data more accurate, in the embodiment, the pressure sensor 12 is arranged at each corner of the shield tail brush fixing seat 2. The shield tail brush fixing seat 2 is fixed on the workbench 11 through the pressure sensor 12. Meanwhile, the counter 13 is arranged on one side of the shield tail brush fixing seat 2. In this way, the bending fatigue data of the shield tail brush 4 can be accurately collected.

[0029] Considering that the shield tail brush 4 is welded on the shield tunneling machine in actual use, if the clamping or other methods are adopted, the authenticity and reliability of the data will be affected. Therefore, the shield tail brush fixing plate 3 is detachably arranged at the top of the shield tail brush fixing seat 2. The shield tail brush 4 is welded on the shield tail brush fixing plate 3. In this way, when the shield tail brush 4 is replaced, only the shield tail brush fixing plate 3 needs to be replaced, and the shield tail brush fixing seat 2 does not need to be replaced.

[0030] Considering that the shield tail brush 4 is welded on the shield tail brush fixing plate 3, it is impossible to ensure that the welding positions of all the shield tail brushes 4 are consistent during the welding process. Therefore, in the embodiment, the shield tail brush fixing plate 3 comprises the upper fixing plate 31, the middle plate 32 and the lower fixing plate 33 which are arranged in sequence along the inclined direction of the top surface of the shield tail brush fixing seat 2. The connecting slot holes 34 are arranged on both sides of the upper fixing plate 31, the middle plate 32 and the lower fixing plate 33. The fixing holes which are matched with the connecting slot holes 34 are arranged on the shield tail brush fixing seat 2. Meanwhile, the adjusting bolts 35 are arranged on both sides of the middle plate 32. The adjusting bolts 35 pass through the middle plate 32 and are in contact with the upper fixing plate 31 and the lower fixing plate 33. In this way, when welding, the shield tail brush is fixed on the middle plate 32. Then, the middle plate 32 is fixed on the shield tail brush fixing seat 2. The positions of the upper fixing plate 31 and the lower fixing plate 33 are limited by the adjusting bolts 35. Then, the shield tail brush fixing plate 3 is fixed on the shield tail brush fixing seat 2 by the bolts. Then, the shield tail brush 4 is spot-welded.

[0031] Considering that the shield tail brush 4 is frequently stressed, the circulating pressurizing mechanism 5 is further arranged on the rack 1. Specifically, the circulating pressurizing mechanism 5 comprises the guide column 51 arranged at the corner of the workbench 11 and the fixing plate 52 arranged at the top of the guide column 51. The pressurizing cylinder 53 is arranged on the fixing plate 52. The power end of the pressurizing cylinder 53 passes through the fixing plate 52 and is arranged downward. The lifting plate 54 is connected to the power end of the pressurizing cylinder 53. In order to ensure the stability and smoothness of the lifting plate 54, in the embodiment, the guide column 51 is a light shaft. The linear bearings are arranged at the four corners of the lifting plate 54. In this way, under the action of the pressurizing cylinder 53, the lifting plate 54 can be stably lifted and lowered.

[0032] In order to simulate the real use scene, in the embodiment, the pressurizing seat 55 is arranged at the bottom of the lifting plate 54, and the pressurizing seat 55 is arranged above the tail brush 4. Specifically, the pressurizing seat 55 includes pressurizing plates 551 arranged at intervals. In the embodiment, the pressurizing plates 551 are arranged at intervals along the transverse direction of the tail brush 4. In the embodiment, three pressurizing plates 551 are arranged at intervals. The connecting shafts 552 are arranged between the pressurizing plates 551. The pressurizing bearings 553 are sleeved on the connecting shafts 552. The pressurizing bearings 553 are arranged on the connecting shafts 552 and protrude from the bottom of the pressurizing plate 551. The main reason why the pressurizing bearings 553 protrude from the pressurizing plate 551 is that the pressurizing bearings 553 need to be in contact with the tail brush 4. The pressurizing bearings 553 are arranged mainly in consideration of the fact that the tail brush 4 will be rubbed to a certain extent during actual use. The pressurizing bearings 553 can rotate to a certain extent during the pressing or lifting process, so as to simulate the rubbing state and ensure the consistency of the test and use.

[0033] Through the above arrangement, the simulation of the use scene is effectively realized, and more accurate and real experimental data are obtained, thereby providing a reliable basis for the improvement of the tail brush 4.

[0034] In consideration of the fact that the pressurizing cylinder 53 needs to be frequently lifted and the pressure needs to be controlled, in order to better control the process of the pressurizing cylinder 53, the sensor bracket 6 is arranged on one side of the fixed plate 52. The upper limit position sensor 61 and the lower limit position sensor 62 are arranged on the sensor bracket 6. The pressing stroke of the pressurizing seat 55 is the distance between the upper limit position sensor 61 and the lower limit position sensor 62. In this way, the upper limit position sensor 61 and the lower limit position sensor 62 are arranged to control the pressure, so as to effectively adjust the pressure and facilitate the control and easy acquisition of more data.

[0035] In consideration of the structure of the tail brush 4, in order to ensure the accuracy of the signal feedback of the upper limit position sensor 61 and the lower limit position sensor 62, in the embodiment, the upper limit position sensor 61 and the lower limit position sensor 62 are both diffuse reflection infrared sensors. In this way, the diffuse reflection infrared sensors are used to perceive the state of the tail brush 4, so as to ensure the accuracy of the experiment.

[0036] In order to avoid the impact on the machine caused by the sudden drop of the pressurizing plate due to the unloading of the pressurizing cylinder caused by the excessive pressure or the sudden disappearance of the air pressure, in the embodiment, the lower limit position support 8 is arranged on the workbench 11 and arranged below the lifting plate 54. In order to avoid the safety between the lifting plate 54 and the fixed plate 52, in the embodiment, the upper limit position support 7 is arranged on the lifting plate 54 and arranged below the fixed plate 52.

[0037] In order to conveniently adjust the limiting height, in the embodiment, the upper limiting support 7 and the lower limiting support 8 both include a fixed tube and a limiting column sleeved in the fixed tube, and the limiting column is threadedly connected with the fixed tube, so that the height adjustment of the upper limiting support 7 and the lower limiting support 8 can be realized by adjusting the extending height of the limiting column, thereby ensuring the safety of the experimental device.

[0038] In order to conveniently disassemble the tail brush 4, in the embodiment, a through hole for the upper limiting support 7 to pass through is arranged on the fixed plate 52, and a gate mechanism 9 for sealing the through hole is arranged on the fixed plate 52, the gate mechanism 9 includes a guide groove 91 arranged at the bottom of the fixed plate 52, the guide groove 91 is arranged in an L shape, the guide groove 91 is arranged on both sides of the through hole, a gate plate 92 is arranged between the two guide grooves 91, the gate plate 92 is arranged in an oblong plate shape, a door handle 93 is arranged on the gate plate 92, the door handle 93 is arranged in a cylindrical shape, and the door handle 93 is arranged at one end of the gate plate 92 away from the through hole, the door handle 93 penetrates through the fixed plate 52, the fixed plate 52 is provided with a guide groove 91 for the door handle 93 to pass through and a limiting plate 94 for locking the door handle 93, and the limiting plate 94 is hingedly arranged with the fixed plate 52. In this way, the limiting plate 94 is turned to abut against the door handle 93, so that the through hole is closed, when the tail brush fixed plate 3 needs to be disassembled, the limiting plate 94 is turned to be separated from the door handle 93, then the door handle 93 is moved away from the through hole, at this time, the upper limiting support 7 can extend out of the through hole, thereby lifting the height of the lifting plate 54, and the tail brush fixed plate 3 is conveniently disassembled.

[0039] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made on the basis of the technical essence of the present application to the above embodiment still falls within the protection scope of the present application.

Claims

1. A shield tail brush bending fatigue testing machine, characterized in that, The device includes a frame and a worktable mounted on top of the frame. A shield tail brush holder is mounted on the worktable, and a pressure sensor is located at the bottom of the holder. The holder is fixed to the worktable by the pressure sensor. The top surface of the holder is inclined, and a shield tail brush mounting plate is detachably mounted on the top of the holder. A shield tail brush is welded to the mounting plate. A circulating pressurization mechanism is also mounted on the frame. This mechanism includes guide columns located at the corners of the worktable and a mounting plate on top of the guide columns. A pressurization cylinder is mounted on the mounting plate, with its power end penetrating the mounting plate and pointing downwards. The power end of the cylinder is connected to a lifting plate, and a pressurization seat is located at the bottom of the lifting plate, positioned above the shield tail brush. The pressurization seat includes spaced-apart pressurization plates, with a pressure plate between the plates. A connecting shaft is fitted with a pressure bearing, which is distributed throughout the connecting shaft and extends out of the bottom of the pressure plate. A counter is also provided on the frame. A lower limit support is provided on the worktable, located below the lifting plate. An upper limit support is provided on the lifting plate, located below the fixed plate. The fixed plate has a through hole for the upper limit support to pass through. A gate mechanism for sealing the through hole is provided on the fixed plate. The gate mechanism includes a guide groove located at the bottom of the fixed plate, located on both sides of the through hole. A gate plate is provided between the two guide grooves. A door handle is provided on the gate plate, which passes through the fixed plate. The fixed plate has a guide groove for the door handle to pass through and a limiting plate for locking the door handle. The limiting plate and the fixed plate are hinged together.

2. The shield tail brush bending fatigue testing machine according to claim 1, characterized in that, The pressure bearing is positioned above the raised end of the shield tail brush.

3. The shield tail brush bending fatigue testing machine according to claim 2, characterized in that, A sensor bracket is provided on one side of the fixed plate. An upper limit sensor and a lower limit sensor are provided on the sensor bracket. The pressure stroke of the pressure seat is the distance between the upper limit sensor and the lower limit sensor.

4. The shield tail brush bending fatigue testing machine according to claim 3, characterized in that, Both the upper limit sensor and the lower limit sensor are diffuse infrared sensors.

5. The shield tail brush bending fatigue testing machine according to claim 4, characterized in that, The shield tail brush fixing plate includes an upper fixing plate, a middle plate, and a lower fixing plate arranged sequentially along the inclined direction of the top surface of the shield tail brush fixing seat. The upper fixing plate, the middle plate, and the lower fixing plate are provided with connecting slots on both sides, and the shield tail brush fixing seat is provided with fixing holes that mate with the connecting slots.

6. The shield tail brush bending fatigue testing machine according to claim 5, characterized in that, Adjusting bolts are provided on both sides of the intermediate plate, the adjusting bolts are provided through the intermediate plate, and the adjusting bolts are respectively in contact with the upper fixed plate and the lower fixed plate.

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