CN211651507U - Novel mechanical shield tail clearance measuring device - Google Patents
Novel mechanical shield tail clearance measuring device Download PDFInfo
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- CN211651507U CN211651507U CN202020705838.1U CN202020705838U CN211651507U CN 211651507 U CN211651507 U CN 211651507U CN 202020705838 U CN202020705838 U CN 202020705838U CN 211651507 U CN211651507 U CN 211651507U
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Abstract
The utility model discloses a novel mechanical shield tail clearance measuring device, which solves the problems that the clearance measuring data is inaccurate and can not adapt to the severe environment of a shield machine; the utility model comprises a sliding part contacted with the outer surface of the segment and a measuring device for measuring the rotation angle of the sliding part, and the sliding part is rotationally connected with the inner side wall of the tail shield through the measuring device; the measuring device is arranged along the circumferential direction of the inner side wall of the tail shield, and the measuring device is electrically connected with an upper computer through the communication switching module. The utility model discloses simple structure measures the turned angle through the rotation angle encoder, and the clearance value of shield tail and section of jurisdiction is calculated according to the effective length of turned angle and sliding part to the host computer, and application range is wide, can be applicable to in the shield structure machine operational environment of many mud, humidity, many dirt.
Description
Technical Field
The utility model belongs to the technical field of the shield constructs and measures, concretely relates to novel mechanical type shield tail clearance measurement device.
Background
In the shield construction, due to the reasons that the curvature change of the propelling route of the shield machine and the extension length of the propelling oil cylinder cannot be kept consistent constantly and the like, the posture of the last ring of pipe segments assembled in the shield machine is changed, the space between the inner wall of the tail shield shell and the outer diameter of the pipe segments is changed accordingly, and the space is the shield tail gap. When the shield tail clearance variation caused by the change of the posture of the duct piece exceeds the design allowable variation range, transitional extrusion between the shield tail and the duct piece can be caused to accelerate the abrasion of the shield tail sealing brush, a shield tail sealing system is damaged, and even the propelling axis of the shield machine deviates, so that the construction is inconvenient. Therefore, the shield tail clearance needs to be continuously and periodically measured, and the posture of the segment is adjusted by combining with the stroke difference of the propulsion oil cylinder, so that the shield construction can be carried out smoothly.
At present, under the existing shield construction conditions in China, the posture of the duct piece is mainly measured manually, and because the measurement position at each time can not be kept consistent and the difference between the technology of workers and the quality of the workers can exist, the measurement result of the posture of the duct piece often generates larger errors, and on the other hand, the narrow space inside the shield machine and the complex construction environment can bring serious potential safety hazards to measuring personnel. Two important parameters of the segment posture are the stroke difference of a propulsion oil cylinder in the horizontal direction and the vertical direction of a shield and the measurement of the gap between the shield tails of the segments, the ultrasonic distance measurement technology is used for measuring the gap between the shield tails at present, the measurement mode is non-contact and has higher requirements on the environment, and the measurement head is easy to be covered by more sludge impurities in the underground construction environment, so that the measurement distortion or no data is easy to cause.
A mechanical shield tail clearance measuring device is disclosed in chinese patent (application No. CN2019105245845), which has the advantage of improving the measurement accuracy; the method has the disadvantages that a specific refining scheme is not provided for mud, moisture, dust and the like in the actual working condition, and a corresponding solution is not provided for the data acquisition process and the subsequent comprehensive application of the clearance value.
SUMMERY OF THE UTILITY MODEL
Inconvenient and the unable problem that adapts to the complicated environment in the shield constructs the machine of prior art of measurement of shield tail clearance measurement in to the shield constructs the machine, the utility model provides a novel mechanical type shield tail clearance measurement device has solved the unsafe problem of clearance measurement data.
For solving the above technical problem, the utility model discloses the technical scheme who adopts as follows:
a novel mechanical shield tail clearance measuring device comprises a sliding part which is in contact with the outer surface of a duct piece and a measuring device which is used for measuring the rotating angle of the sliding part, wherein the sliding part is rotatably connected with the inner side wall of a tail shield through the measuring device; the measuring device is arranged along the circumferential direction of the inner side wall of the tail shield and is electrically connected with an upper computer through the communication switching module. The communication switching module converts the signal output by the measuring device into a signal which can be read by the upper computer, and after the upper computer receives the angle signal transmitted by the communication switching module, the angle signal is converted into shield tail gap data and is directly displayed on the upper computer to be conveniently read.
The measuring device comprises a base, wherein the base is arranged on the inner side wall of the tail shield, and a first cavity and a second cavity are arranged on the base; a rotating angle encoder is arranged in the first cavity, an output shaft of the rotating angle encoder is connected with the sliding part through a connecting assembly, and when the sliding part slides along the duct piece, the rotating angle encoder and the connecting assembly are driven by the sliding part to synchronously rotate; the rotation angle encoder is electrically connected with the communication switching module and is used for measuring an included angle between the sliding part and the base; the one end that keeps away from the section of jurisdiction of sliding part sets up in the second cavity, and the rotation center point setting of sliding part is on the central axis of base.
The coupling assembling includes the shaft coupling, the shaft coupling sets up in first cavity, and the one end of shaft coupling is connected with the output shaft of rotation angle encoder, and the other end of shaft coupling passes through the connecting axle to be connected with the synchronous rotation of sliding part.
The connecting shaft is fixedly connected with the sliding part, and a torsional spring is arranged on the connecting shaft; the torsional spring is arranged in the second cavity, one end of the torsional spring is connected with the sliding part, and the other end of the torsional spring is connected with the bottom of the second cavity.
And a waterproof sleeve is arranged above the second cavity, one end of the waterproof sleeve is connected with the sliding part, and the other end of the waterproof sleeve is connected with the base. The waterproof jacket is used for sealing and isolating the second cavity.
The one end activity that is close to the section of jurisdiction of sliding part is equipped with the gyro wheel, and the surface of gyro wheel and section of jurisdiction closely laminates.
The base is provided with an installation cover plate and is connected with the inner side wall of the tail shield through the installation cover plate; and a sealing ring is arranged between the mounting cover plate and the first cavity.
The utility model has the advantages that:
the utility model has simple structure, the rotation angle is measured by the rotation angle encoder, the upper computer calculates the clearance value between the tail shield and the duct piece according to the rotation angle and the effective length of the sliding part, and the tunneling parameters of the shield tunneling machine can be further adjusted; the application range is wide, and the shield tunneling machine can be suitable for the shield tunneling machine working environment with much mud, moisture and dust; the device is safe and reliable, and realizes real-time monitoring of the tail shield and the duct piece by continuously measuring the gap of the shield tail; the sealing performance is good, the sealing ring and the waterproof sleeve realize waterproof isolation and sealing of the measuring device, the structure is simple, and the performance is excellent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an installation schematic diagram of the shield tunneling machine of the present invention.
Fig. 2 is a schematic view of the connection between the mounting cover and the sliding portion.
Fig. 3 is a schematic structural diagram of the measuring apparatus.
Fig. 4 is a schematic diagram of the gap values.
In the figure, 3 is a tail shield, 4 is a duct piece, 5 is a measuring device, 5-1 is an installation cover plate, 5-2 is a base, 5-2-1 is a first cavity, 5-2-2 is a second cavity, 5-2-3 is a through hole, 5-3 is a sealing ring, 5-4 is a rotation angle encoder, 5-5 is a coupler, 5-6 is a waterproof sleeve pressing plate, 5-7 is a connecting shaft, 5-8 is a sliding part, 5-8-1 is a roller, 5-9 is a torsion spring, 5-10 is a sealing bearing, 5-11 is a waterproof sleeve, 6 is a communication switching module, 7 is an upper computer, 8 is an installation groove, and 9 is a propulsion oil cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
A novel mechanical shield tail clearance measuring device comprises sliding parts 5-8 contacted with the outer surface of a duct piece 4 and a measuring device 5 used for measuring the rotating angle of the sliding parts 5-8, wherein the sliding parts 5-8 are rotatably connected with the inner side wall of a tail shield 3 through the measuring device 5; a plurality of mounting grooves 8 are formed in the inner side wall of the tail shield 3 along the circumferential direction, the measuring device 5 is mounted in the mounting grooves 8, and the distance value of the shield tail gap can be obtained through the angle value measured by the measuring device 5 so as to facilitate data acquisition; the measuring device 5 is electrically connected with the upper computer 7 through the communication switching module 6, the communication switching module 6 can convert signals output by the measuring device 5 into signals which can be read by the upper computer, and the upper computer 7 converts the angle signals into shield tail gap data and directly displays the shield tail gap data on the upper computer 7 for convenient reading after receiving the angle signals transmitted by the communication switching module 6.
In this embodiment, the number of the mounting grooves 8 is five, the five mounting grooves 8 are uniformly distributed, and the mounting grooves 8, the measuring device 5 and the sliding parts 5-8 are in one-to-one correspondence; the outer surface center points of the five measuring devices 5 are all positioned on the inner side wall of the same cross section of the tail shield 3.
The measuring device 5 comprises a base 5-2, the base 5-2 is arranged in the mounting groove 8, and a first cavity 5-2-1 and a second cavity 5-2-2 are arranged on the base 5-2; a rotation angle encoder 5-4 is arranged in the first cavity 5-2-1, the rotation angle encoder 5-4 is fixedly arranged in the first cavity 5-2-1 through a clamp, and the clamp fixes the rotation angle encoder 5-4, so that the rotation angle encoder 5-4 is prevented from shaking to influence the measurement of the rotation angle encoder 5-4 in the construction process of the shield tunneling machine; an output shaft of the rotating angle encoder 5-4 is fixedly connected with the sliding part 5-8 through a connecting assembly, when the sliding part 5-8 slides along the duct piece 4, the rotating angle encoder 5-4 and the connecting assembly are driven by the sliding part 5-8 to synchronously rotate, and the rotating angle encoder 5-4 is used for measuring an included angle between the sliding part 5-8 and the base 5-2; one end of the sliding part 5-8, which is far away from the pipe piece 4, is arranged in the second cavity 5-2-2, and the rotating central point of the sliding part 5-8 is arranged on the central axis of the base 5-2, so that the shield tail clearance can be calculated through the rotating angle measured by the rotating angle encoder 5-4 and the distance between the rotating central point and the outer surface of the tail shield 3.
As shown in fig. 3, the connecting assembly comprises a coupler 5-5, the coupler 5-5 is arranged in the first cavity 5-2-1, one end of the coupler 5-5 is fixedly connected with an output shaft of the rotation angle encoder 5-4, and the other end of the coupler 5-5 is fixedly connected with a connecting shaft 5-7; through holes 5-2-3 are symmetrically formed in two sides of the second cavity 5-2-2, two ends of the connecting shaft 5-7 are movably arranged in the through holes 5-2-3 through bearings, and the bearings and the connecting shaft 5-7 can be conveniently installed or replaced through the through holes 5-2-3; one end of the sliding part 5-8 is movably provided with a roller 5-8-1, the roller 5-8-1 is in contact with the outer surface of the duct piece 4 and slides along the duct piece 4, and the other end of the sliding part 5-8 is vertically sleeved on the connecting shaft 5-7; the connecting shaft 5-7 is sleeved with a torsion spring 5-9, the middle diameter of the torsion spring 5-9 is larger than the diameter of the connecting shaft 5-7, the torsion spring 5-9 is prevented from rotating to influence the rotation of the connecting shaft 5-7, and the torsion spring 5-9 is arranged in the middle of the sliding part 5-8; one end of the torsion spring 5-9 is connected with the sliding part 5-8, the other end of the torsion spring 5-9 is clamped with the bottom of the second cavity 5-2-2, and the sliding part 5-8 is subjected to reverse torsion of the torsion spring 5-9, so that the roller 5-8-1 is continuously attached to the outer surface of the duct piece 4. When the sliding parts 5-8 slide along the circumference of the duct piece 4, the connecting shafts 5-7 are synchronously driven to rotate, the rotating of the connecting shafts 5-7 synchronously drives the shaft couplers 5-5 to rotate, the rotating of the shaft couplers 5-5 synchronously drives the rotating of the output shafts of the rotating angle encoders 5-4, and the included angle between the initial position and the detection position of the sliding parts 5-8 can be detected by the rotating angle encoders 5-4 through the method.
An aviation plug-in is arranged on one side of the base 5-2, and an output line of the rotation angle encoder 5-4 penetrates through the aviation plug-in and is then electrically connected with the communication switching module 6, so that angle information measured by the rotation angle encoder 5-4 is transmitted to the upper computer 7 through the communication switching module 6; the first cavity 5-2-1 can be isolated by the arrangement of the aviation plug-in, the leading-out of an output line of the rotary angle encoder 5-4 is not influenced, and the protection level is improved; the upper part of the second cavity 5-2-2 is provided with a waterproof sleeve 5-11, one side of the waterproof sleeve 5-11 is fixedly connected with the sliding part 5-8, the other side of the waterproof sleeve 5-11 is fixed on the second cavity 5-2-2 through a waterproof sleeve pressing plate 5-6, and the waterproof sleeve pressing plate 5-6 can press the edge part of the waterproof sleeve 5-11 to carry out isolation sealing; as shown in fig. 3, a sealing ring 5-3 is arranged at the upper part of the first cavity 5-2-1, as shown in fig. 2, the sealing ring 5-3 is fixed on the base 5-2 through a mounting cover plate 5-1, and the sealing ring 5-3 is arranged around the first cavity 5-2-1, so that the first cavity 5-2-1 is sealed and isolated, and the rotary angle encoder 5-4 can be protected.
The communication switching module 6 comprises an RS-422/485 bidirectional signal converter, the measuring device 5 is electrically connected with the upper computer 7 through the RS-422/485 bidirectional signal converter, and the RS-422/485 signal converter converts 422 signals sent by the measuring device 5 into 485 signals which can be read by the upper computer 7, so that the upper computer 7 can process data conveniently.
As shown in fig. 4, the gap calculating method of the present invention includes the following steps:
s1, arranging a plurality of measuring devices 5 in the circumferential direction of the inner side wall of the tail shield 3, and arranging a propulsion oil cylinder 9 for adjusting the posture of the segment 4 in the tail shield 3; the thrust cylinders 9 are arranged on the outer side of the segment 4 in the circumferential direction.
S2, setting the center of the cross section of the tail shield 3 as an origin coordinate O1(0,0), setting the right-above angle of the cross section of the tail shield 3 as 0 degree, setting the radius line where 0 degree is located as a zero-degree line, setting the connecting line of the rotation center point of the sliding part 5-8 and the origin coordinate O1(0,0) as an angle line, and increasing the center angle C formed by the angle line and the zero-degree line along the clockwise direction.
S3, calculating a clearance value between the center point of the outer surface of the measuring device 5 and the corresponding point of the outer surface of the segment 4 according to the effective length of the sliding part 5-8 and the angle value measured by the rotary angle encoder 5-4;
the calculation formula of the clearance value a is as follows:
a＝l·sinθ-h；
in the formula, l represents the effective length of the sliding part 5-8, theta represents an angle value measured by the rotation angle encoder 5-4, namely an included angle between the sliding part 5-8 and the plane of the base 5-2, and h represents a distance from the rotation center point of the sliding part 5-8 to the inner side wall of the tail shield 3.
The utility model discloses a theory of operation:
in the normal tunneling process of the shield tunneling machine, a measuring device 5 is fixed on the inner side wall of a tail shield 3, a sliding part 5-8 is subjected to reverse torsion of a torsion spring 5-9, a roller 5-8-1 at the tail end of the sliding part 5-8 is tightly attached to the outer surface of a duct piece 4, when a shield tail gap between the measuring device 5 and the duct piece 4 changes, the sliding part 5-8 can float up and down along with the change of the shield tail gap, the sliding part 5-8 drives a connecting shaft 5-7 and a rotation angle encoder 5-4 to rotate simultaneously, an included angle between the sliding part 5-8 and a plane of a base 5-2 is read through the rotation angle encoder 5-4 and is converted into a 422 signal, the 422 signal is transmitted to a communication switching module 6 through a cable, the communication switching module 6 converts the 422 signal into a 485 signal, and the angle value is transmitted to the upper computer 7 through a cable, and the upper computer 7 converts the angle value into a shield tail clearance value by using a correlation algorithm.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A novel mechanical shield tail clearance measuring device is characterized by comprising a sliding part (5-8) in contact with the outer surface of a duct piece (4) and a measuring device (5) for measuring the rotating angle of the sliding part (5-8), wherein the sliding part (5-8) is rotatably connected with the inner side wall of a tail shield (3) through the measuring device (5); the measuring device (5) is arranged along the circumferential direction of the inner side wall of the tail shield (3), and the measuring device (5) is electrically connected with the upper computer (7) through the communication switching module (6).
2. The novel mechanical shield tail clearance measuring device according to claim 1, characterized in that the measuring device (5) comprises a base (5-2), the base (5-2) is arranged on the inner side wall of the tail shield (3), and the base (5-2) is provided with a first cavity (5-2-1) and a second cavity (5-2-2); a rotating angle encoder (5-4) is arranged in the first cavity (5-2-1), and an output shaft of the rotating angle encoder (5-4) is connected with the sliding part (5-8) through a connecting assembly; the rotation angle encoder (5-4) is electrically connected with the communication switching module (6); one end of the sliding part (5-8) far away from the pipe piece (4) is arranged in the second cavity (5-2-2), and the rotating central point of the sliding part (5-8) is arranged on the central axis of the base (5-2).
3. The novel mechanical shield tail clearance measuring device of claim 2, characterized in that the connecting assembly comprises a coupler (5-5), the coupler (5-5) is arranged in the first cavity (5-2-1), one end of the coupler (5-5) is connected with an output shaft of the rotation angle encoder (5-4), and the other end of the coupler (5-5) is synchronously and rotatably connected with the sliding part (5-8) through a connecting shaft (5-7).
4. The novel mechanical shield tail clearance measuring device according to claim 3, characterized in that the connecting shaft (5-7) is fixedly connected with the sliding part (5-8), a torsion spring (5-9) is arranged on the connecting shaft (5-7), the torsion spring (5-9) is arranged in the second cavity (5-2-2), one end of the torsion spring (5-9) is connected with the sliding part (5-8), and the other end of the torsion spring (5-9) is connected with the bottom of the second cavity (5-2-2).
5. The novel mechanical shield tail clearance measuring device according to any one of claims 2-4, characterized in that a waterproof jacket (5-11) is arranged above the second cavity (5-2-2), one end of the waterproof jacket (5-11) is connected with the sliding part (5-8), and the other end of the waterproof jacket (5-11) is connected with the base (5-2).
6. The novel mechanical shield tail clearance measuring device according to claim 5, wherein a roller (5-8-1) is movably arranged at one end of the sliding part (5-8) close to the duct piece (4), and the roller (5-8-1) is tightly attached to the outer surface of the duct piece (4).
7. The novel mechanical shield tail clearance measuring device according to claim 6, characterized in that a mounting cover plate (5-1) is arranged on the base (5-2), and the base (5-2) is connected with the inner side wall of the tail shield (3) through the mounting cover plate (5-1); and a sealing ring (5-3) is arranged between the mounting cover plate (5-1) and the first cavity (5-2-1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020705838.1U CN211651507U (en) | 2020-04-30 | 2020-04-30 | Novel mechanical shield tail clearance measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020705838.1U CN211651507U (en) | 2020-04-30 | 2020-04-30 | Novel mechanical shield tail clearance measuring device |
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| CN211651507U true CN211651507U (en) | 2020-10-09 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833840A (en) * | 2020-12-31 | 2021-05-25 | 黑龙江工业学院 | Device and method for detecting brake shoe gap of mine hoist |
| CN113945162A (en) * | 2021-10-14 | 2022-01-18 | 上海隧道工程有限公司 | Contact type shield tail clearance measuring system and measuring method thereof |
| CN114000887A (en) * | 2021-11-22 | 2022-02-01 | 盾构及掘进技术国家重点实验室 | Stay wire type shield/TBM shield tail clearance real-time measuring device and measuring method thereof |
| CN114111555A (en) * | 2021-11-22 | 2022-03-01 | 盾构及掘进技术国家重点实验室 | Mechanical shield/TBM shield tail clearance real-time measuring device and measuring method thereof |
| CN114111554A (en) * | 2021-11-22 | 2022-03-01 | 盾构及掘进技术国家重点实验室 | Real-time measuring device and method for shield tail clearance of resistance type shield/TBM (tunnel boring machine) |
-
2020
- 2020-04-30 CN CN202020705838.1U patent/CN211651507U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833840A (en) * | 2020-12-31 | 2021-05-25 | 黑龙江工业学院 | Device and method for detecting brake shoe gap of mine hoist |
| CN113945162A (en) * | 2021-10-14 | 2022-01-18 | 上海隧道工程有限公司 | Contact type shield tail clearance measuring system and measuring method thereof |
| CN114000887A (en) * | 2021-11-22 | 2022-02-01 | 盾构及掘进技术国家重点实验室 | Stay wire type shield/TBM shield tail clearance real-time measuring device and measuring method thereof |
| CN114111555A (en) * | 2021-11-22 | 2022-03-01 | 盾构及掘进技术国家重点实验室 | Mechanical shield/TBM shield tail clearance real-time measuring device and measuring method thereof |
| CN114111554A (en) * | 2021-11-22 | 2022-03-01 | 盾构及掘进技术国家重点实验室 | Real-time measuring device and method for shield tail clearance of resistance type shield/TBM (tunnel boring machine) |
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