F-shaped socket pipe piece joint quality rapid detection device and use method thereof

Abstract

The invention relates to the field of underground tunnel engineering quality detection, in particular to an F-shaped socket type segment joint quality rapid detection device and a use method.The F-shaped socket type segment joint quality rapid detection device comprises a motor support, a traction roller, a torque motor and a sandwich type flexible patch, the motor support is arranged at the top of a segment and kept fixed, and the traction roller is erected at the top end of the motor support; the torque motor is arranged on the outer side of the motor support, an output shaft of the torque motor is connected with a rotating shaft of the traction roller, one end of the sandwich type flexible patch is arranged in a joint of the sleeving position of the segment steel sleeve and the segment connector, the other end of the sandwich type flexible patch is connected with the traction roller, and the torque motor drives the traction roller to rotate. The traction roller pulls the sandwich type flexible patch to draw out the sandwich type flexible patch from the joint of the sleeving part of the segment steel sleeve and the segment joint, and the found segment which does not meet the requirement can be adjusted in time, so that the accuracy of measured data is improved, and the measured data has timeliness.

Description

Technical Field

[0001] The present invention relates to the field of underground tunnel engineering quality detection, and in particular to an F-type socket-and-spigot type pipe segment joint quality rapid detection device and a use method thereof. Background Art

[0002] As the core connecting component of underground tunnel segments, the F-type socket-and-spigot segment joint mainly relies on the close contact between the elastic sealing strip pasted on the inner concrete socket and the outer steel sleeve socket to achieve the sealing of the segment joint. The size of its contact stress and contact surface directly determine the waterproof sealing performance and structural stability of the joint. In addition, according to engineering practice experience, during the segment jacking process, if the rubber strip flips, even if the interface stress meets the requirements, the elastic rubber pad and the steel sleeve are in a virtual contact state, and the contact area is significantly smaller than the normal contact state. In view of this, the interface stress of the elastic rubber pad and the actual contact area are relatively stable. The contact area needs to be tested and controlled as an important indicator of the segment installation quality. The factors that affect the contact stress and area of the segment sealing interface mainly come from processing size errors, jacking installation quality, uneven soil settlement, etc. Once the segment enters the soil layer, it is basically difficult to adjust the segment contact state through manual intervention. If the contact state of the F-type socket-type segment joint of each pipe segment can be tested in time before the segment enters the soil layer, the segment contact state can be adjusted in time. Timely adjustment of the segment that does not meet the requirements is of great significance to ensuring the sealing effect and project safety.

[0003] Traditional detection methods, such as the method of using built-in pre-buried sensors, have high economic and time costs, are complex and time-consuming to operate, and are not suitable for comprehensive detection of the contact status of all segments, resulting in a lack of timeliness in the measurement results. To this end, a rapid quality detection device and method for F-type socket-type segment joints are proposed. Summary of the Invention

[0004] In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides an F-type socket-type pipe segment joint quality rapid detection device and a use method.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an F-type socket-type pipe segment joint quality rapid detection device, comprising a motor bracket, a traction roller, a torque motor and a sandwich-type flexible patch;

[0006] The motor bracket is placed on the top of the pipe segment and remains fixed;

[0007] The traction roller is mounted on the top of the motor bracket, the torque motor is arranged outside the motor bracket, and the output shaft of the torque motor is connected to the rotating shaft of the traction roller;

[0008] One end of the sandwich-type flexible patch is arranged in the joint between the pipe segment steel sleeve and the pipe segment joint, and the other end of the sandwich-type flexible patch is connected to the traction roller;

[0009] The torque motor drives the traction roller to rotate, and the traction roller pulls the sandwich flexible patch to extract the sandwich flexible patch from the joint between the pipe segment steel sleeve and the pipe segment joint sleeve.

[0010] Preferably, the sandwich flexible patch includes a packaging layer, a friction layer, a core layer and an oil cavity. The packaging layer is adhered to the inner surface of the pipe segment socket steel ring through an elastic sealing strip. The two groups of friction layers are evenly adhered to the inner surfaces on both sides of the packaging layer. The core layer is arranged between the two groups of friction layers. The surface of the friction layer is smoothed. The packaging layer is sealed by heat processing to form an oil cavity. The oil cavity is filled with friction medium.

[0011] Preferably, the encapsulation layer is composed of a polymer film, and the friction medium is selected from one of silicone oil, nano- and silicon dioxide suspensions.

[0012] Preferably, drainage grooves are provided on the surface of the core layer, and the drainage grooves are provided in several groups, with the intervals between two adjacent groups of drainage grooves being the same, and the drainage grooves are parallel to the edge of the core layer.

[0013] Preferably, a fixing rod is provided at the end of the core layer, and the length of the fixing rod is greater than the width of the core layer.

[0014] Preferably, the traction roller includes a roller body and a fixed slot, the roller body is connected to the inner side of the motor bracket through a rotating shaft, the rotating shaft of the roller body is connected to the output end of the torque motor, and the fixed slot is opened on the outer side of the roller body, and the fixed slot is adapted to the size of the fixed rod.

[0015] Preferably, a limit baffle is provided on the outside of the roller body, the limit baffle is arranged in a fan shape, and several groups of the limit baffles are evenly distributed on the outside of the roller body.

[0016] The method for using the F-type socket-type pipe segment joint quality rapid detection device includes the following steps:

[0017] Step S1: installing a pipe segment socket steel collar at the end of a group of pipe segments, selecting a plurality of test points on the inner wall of the pipe segment socket steel collar, and installing a group of sandwich-type flexible patches at each test point using an adhesive;

[0018] Step S2: cutting open the packaging layer of the sandwich flexible patch, and docking one set of segments with the other set of segments. During the docking process, the sandwich flexible patch is sandwiched between the segments and the segment socket steel collar. At this time, the sandwich flexible patch is squeezed by the elastic sealing strip and the segment socket steel collar, and the friction medium liquid in the oil cavity inside the packaging layer is discharged along the drainage groove under pressure, so that the contact surface between the core layer and the friction layer is evenly covered with the friction medium.

[0019] Step S3, wrapping a fixing rod at the end of the core layer;

[0020] Step S4: fix the motor bracket to the top of the segment, set the traction roller on the top of the motor bracket, connect the traction roller to the output end of the torque motor on the side of the motor bracket, and connect the torque motor to an external power supply and an external CNC terminal;

[0021] Step S5, wrapping the core layer on the outer surface of the roller body, and clamping the fixing rod at the end of the core layer into the fixing groove on the roller body;

[0022] Step S6, starting the torque motor, which drives the roller body to rotate at a constant angular velocity ω, and the roller body pulls and reels the core layer during the rotation process;

[0023] Step S7, when the roller body pulls and reels the core layer, friction is generated between the core layer and the friction layer, and the output torque data of the torque motor is recorded and formed into a curve;

[0024] Step S8, during the process of the core layer being drawn out from the middle of the friction layer, the output torque data of the torque motor is recorded and a torque data curve is formed, wherein the ordinate represents the instantaneous output torque of the torque motor and the abscissa represents the working time of the torque motor.

[0025] Preferably, it also includes:

[0026] Step S9, calculating the contact stress and contact surface size of the sealing strip in combination with the torque data curve;

[0027] Step S91: The F-type socket-and-spigot segment is provided with n sealing strips, the width of the core layer is b, and the radius of the roller body is r;

[0028] Step S92: Analysis of the torque data curve shows that as the torque motor runs to time t1, the core layer is gradually extracted, and the friction force between the core layer and the friction layer gradually stabilizes from T0 to T1. The motor continues to rotate until time t2, and the core layer begins to be extracted from the first sealing strip. It continues to rotate until time t3, and the contact surface gradually decreases. The motor output torque gradually decreases to T2, and the core layer completely separates from the first sealing strip. The torque stabilizes to T2, and then the core layer passes through subsequent sealing strips in sequence. The torque decreases to T3 and Tn in sequence until it is completely extracted. The torque value at each stage is recorded.

[0029] Step S93: within the width of the core layer, the actual contact stress of the nth (n≥1) sealing strip is:

[0030]

[0031] The actual contact area of the nth (n≥1) sealing strip is:

[0032] rbω(t 2n -t 2n-1 );

[0033] Where μ is the friction coefficient and ω is the angular velocity of the motor.

[0034] Preferably, the friction coefficient μ is calibrated through experiments before the test begins.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] The present invention is provided with a motor bracket, a traction roller, a torque motor and a sandwich-type flexible patch. The torque motor drives the roller body to rotate, and the roller body pulls and reels the core layer. During the process of the roller body pulling and reeling the core layer, the core layer is pulled, so that friction is generated between the core layer and the friction layer. During the process of the core layer being drawn out from the middle of the friction layer, the output torque data of the torque motor is recorded. Before the pipe segment enters the soil layer, the contact state of the F-type socket-type pipe segment joint of each pipe segment is timely detected, and the contact state of the pipe segment can be timely adjusted. The recorded data is calculated and analyzed, and the pipe segment found to not meet the requirements can be adjusted in time, thereby improving the accuracy of the measurement data and making the measurement data timely.

[0037] This solution does not require drilling or cutting on the surface of the segments, thus avoiding damage to the original stress field, ensuring the integrity of the structure and providing a foundation for long-term assurance of project quality.

[0038] The present invention further provides a traction roller including a roller body and a fixed slot. The roller body is connected to the inner side of the motor bracket through a rotating shaft. The rotating shaft of the roller body is connected to the output end of the torque motor. The fixed slot is provided on the outer side of the roller body. The fixed slot is adapted to the size of the fixed rod. The fixed slot is engaged with the fixed rod so that the end of the core layer is connected to the roller body. A limit baffle is provided on the outer side of the roller body. The limit baffle is arranged in a fan shape. Several groups of limit baffles are evenly distributed on the outer side of the roller body. The edge of the core layer is limited by the limit baffle to prevent the core layer from deviating during the rotation of the roller body, thereby affecting the final measurement data result.

[0039] The packaging layer of the sandwich-type flexible patch can be filled with a specific friction medium to adjust the friction coefficient between the friction layer and the core layer to adapt to different friction force ranges, and has strong adaptability and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0041] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0042] Figure 2 This is a schematic diagram of the present invention in use;

[0043] Figure 3 Schematic diagram of the cross-sectional structure of the sandwich-type flexible patch of the present invention;

[0044] Figure 4 This is a schematic diagram of the unfolded structure of the sandwich-type flexible patch of the present invention;

[0045] Figure 5 It is a side structural schematic diagram of the present invention;

[0046] Figure 6 It is a schematic diagram of the three-dimensional structure of the traction roller of the present invention;

[0047] Figure 7 This is a schematic diagram of the use of the present invention Figure 1 ;

[0048] Figure 8 This is a schematic diagram of the use of the present invention Figure 2 ;

[0049] Figure 9 This is a torque data curve diagram of the present invention.

[0050] The numbers in the figure represent:

[0051] 1. Motor bracket; 2. Traction roller; 21. Roller body; 22. Fixing slot; 211. Limit baffle; 3. Torque motor; 4. Sandwich flexible patch; 41. Packaging layer; 42. Friction layer; 43. Core layer; 431. Drain trough; 432. Fixing rod; 44. Oil chamber. DETAILED DESCRIPTION

[0052] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the above and other technical features and advantages of the present invention are further described. However, the following embodiments are merely preferred embodiments of the present invention and are not exhaustive.

[0053] Example:

[0054] like Figure 1 - Figure 9As shown, the present invention provides an F-type socket-type pipe segment joint quality rapid detection device, comprising a motor bracket 1, a traction roller 2, a torque motor 3 and a sandwich-type flexible patch 4;

[0055] The motor bracket 1 is placed on the top of the pipe segment and kept fixed;

[0056] The traction roller 2 is mounted on the top of the motor bracket 1, the torque motor 3 is arranged outside the motor bracket 1, and the output shaft of the torque motor 3 is connected to the rotating shaft of the traction roller 2;

[0057] One end of the sandwich-type flexible patch 4 is arranged in the joint between the pipe segment steel sleeve and the pipe segment joint, and the other end of the sandwich-type flexible patch 4 is connected to the traction roller 2 .

[0058] The sandwich-type flexible patch 4 includes an encapsulation layer 41 , a friction layer 42 and a core layer 43 ;

[0059] The packaging layer 41 is adhered to the inner surface of the steel ring through an elastic sealing strip. The packaging layer 41 is made of a molecular film such as PP or PET that is oil-resistant, wear-resistant and strong. An oil cavity 412 is formed inside the closed packaging layer 41. The oil cavity 412 is filled with a friction medium. The friction layer 42 is evenly adhered to the inner surfaces on both sides of the packaging layer 41. The core layer 43 is arranged between the two groups of friction layers 42. The friction layer 42 and the core layer 43 are both made of a thin sheet material made of a high-toughness, high-elasticity and wear-resistant polymer material such as PTFE. The surface of the friction layer 42 is smoothed, and the friction coefficient between the friction layer 42 and the core layer 43 is adjusted by the friction medium in the oil cavity 412 to adapt to different friction force ranges.

[0060] The core layer 43 is provided with drainage grooves 431 on its surface. There are several groups of drainage grooves 431. The intervals between two adjacent groups of drainage grooves 431 are the same. The drainage grooves 431 are parallel to the edges of the core layer 43. The liquid in the oil cavity 412 is drained through the drainage grooves 431 to keep the friction force between the friction layer 42 and the core layer 43 stable during the friction process.

[0061] A fixing rod 432 is provided at the end of the core layer 43 . The length of the fixing rod 432 is greater than the width of the core layer 43 . The fixing rod 432 simplifies the fixing operation of the end of the core layer 43 .

[0062] The traction roller 2 includes a roller body 21 and a fixed slot 22. The roller body 21 is connected to the inner side of the motor bracket 1 through a rotating shaft. The rotating shaft of the roller body 21 is connected to the output end of the torque motor 3. The fixed slot 22 is opened on the outer side of the roller body 21. The fixed slot 22 is adapted to the size of the fixed rod 432. The end of the core layer 43 is connected to the roller body 21 by clamping the fixed slot 22 with the fixed rod 432.

[0063] A limit baffle 211 is provided on the outside of the roller body 21. The limit baffle 211 is arranged in a fan shape. Several groups of limit baffles 211 are evenly distributed on the outside of the roller body 21. The limit baffle 211 limits the edge of the core layer 43 to prevent the core layer 43 from being offset during the rotation of the roller body 21, thereby affecting the final measurement data results.

[0064] How to use the F-type socket-type pipe segment joint quality rapid detection device:

[0065] A pipe segment socket steel sleeve is installed at the end of a group of pipe segments, and several test points are selected on the inner wall of the pipe segment socket steel sleeve. A group of sandwich flexible patches 4 are installed at each test point through adhesive, and the packaging layer of the sandwich flexible patch 4 is cut open. One group of pipe segments is docked with another group of pipe segments. The sandwich flexible patch 4 is sandwiched between the pipe segment and the pipe segment socket steel sleeve during the docking process of the two groups of pipe segments. At this time, the sandwich flexible patch is squeezed by the elastic sealing strip and the pipe segment socket steel sleeve, and the friction medium liquid in the oil cavity inside the packaging layer is pressurized and discharged along the drainage groove, so that the contact surface between the core layer and the friction layer is evenly covered with friction medium.

[0066] Wrap the fixing rod around the end of the core layer, fix the motor bracket to the top of the pipe segment, set the traction roller on the top of the motor bracket, and connect the traction roller to the output end of the torque motor on the side of the motor bracket, connect the torque motor to the external power supply and the external CNC terminal, wrap the core layer around the outer surface of the roller body, and clamp the fixing rod at the end of the core layer into the fixed slot on the roller body.

[0067] Start the torque motor, and the torque motor drives the roller body to rotate at a constant angular velocity ω. The roller body pulls and reels the core layer during the rotation process. Friction is generated between the core layer and the friction layer during the process of the roller body pulling and reeling the core layer. The output torque data of the torque motor is recorded and formed into a curve. During the process of the core layer being pulled out from the middle of the friction layer, the output torque data of the torque motor is recorded and formed into a torque data curve. The vertical axis in the figure represents the instantaneous output torque of the torque motor, and the horizontal axis in the figure represents the working time of the torque motor.

[0068] The contact stress and contact surface size of the sealing strips are calculated in combination with the torque data curve. The F-type socket-type segment is provided with n sealing strips, the width of the core layer is b, and the radius of the roller body is r. Analysis of the torque data curve shows that as the torque motor runs to time t1, the core layer is gradually pulled out, and the friction force between the core layer and the friction layer gradually stabilizes from T0 to T1. The motor continues to rotate to time t2, and the core layer begins to be pulled out from the first sealing strip. It continues to rotate to time t3, the contact surface gradually decreases, and the motor output torque gradually decreases to T2. The core layer is completely separated from the first sealing strip, and the torque stabilizes to T2. Then the core layer passes through the subsequent sealing strips in turn, and the torque drops to T3 and Tn in turn until it is completely pulled out. The torque value of each stage is recorded.

[0069] Within the width of the core layer, the actual contact stress of the nth (n≥1) sealing strip is:

[0070]

[0071] The actual contact area of the nth (n≥1) sealing strip is:

[0072] rbω(t 2n -t 2n-1 );

[0073] Where: μ is the friction coefficient, ω is the angular velocity of the motor, and the friction coefficient μ is calibrated through experiments before the test begins.

[0074] The above description is merely a preferred embodiment of the present invention and is intended to be illustrative rather than restrictive of the present invention. Those skilled in the art will appreciate that many changes, modifications, and even equivalents may be made to the present invention within the spirit and scope of the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A rapid quality detection device for F-type socket-type pipe segment joints, characterized in that: It comprises a motor bracket (1), a traction roller (2), a torque motor (3) and a sandwich-type flexible patch (4); The motor bracket (1) is placed on the top of the tube segment and remains fixed; The traction roller (2) is mounted on the top of the motor bracket (1), the torque motor (3) is arranged outside the motor bracket (1), and the output shaft of the torque motor (3) is connected to the rotating shaft of the traction roller (2); One end of the sandwich-type flexible patch (4) is arranged in the joint between the pipe segment steel sleeve and the pipe segment joint, and the other end of the sandwich-type flexible patch (4) is connected to the traction roller (2); The torque motor (3) drives the traction roller (2) to rotate, and the traction roller (2) pulls the sandwich-type flexible patch (4) to extract the sandwich-type flexible patch (4) from the joint between the pipe segment steel sleeve and the pipe segment joint sleeve.

2. The F-type socket-and-spigot joint quality rapid detection device according to claim 1, characterized in that: The sandwich-type flexible patch (4) comprises a packaging layer (41), a friction layer (42), a core layer (43) and an oil cavity (44); the packaging layer (41) is adhered to the inner surface of the pipe segment socket steel ring through an elastic sealing strip; two groups of friction layers (42) are evenly adhered to the inner surfaces on both sides of the packaging layer (41); the core layer (43) is arranged between the two groups of friction layers (42); the surface of the friction layer (42) is smoothed; the four sides of the packaging layer (41) are sealed by heat processing to form an oil cavity (44); and the interior of the oil cavity (44) is filled with a friction medium.

3. A rapid quality detection device for F-type socket-type pipe segment joints according to claim 2, characterized in that: The encapsulation layer (41) is composed of a polymer film, and the friction medium is selected from one of silicone oil, nano- and silicon dioxide suspensions.

4. The F-type socket-and-spigot joint quality rapid detection device according to claim 2, characterized in that: The surface of the core layer (43) is provided with drainage grooves (431), and the drainage grooves (431) are provided in a plurality of groups, and the intervals between two adjacent groups of drainage grooves (431) are the same. The drainage grooves (431) are parallel to the edge of the core layer (43).

5. The F-type socket-and-spigot joint quality rapid detection device according to claim 4, characterized in that: A fixing rod (432) is provided at the end of the core layer (43), and the length of the fixing rod (432) is greater than the width of the core layer (43).

6. The F-type socket-and-spigot joint quality rapid detection device according to claim 1, characterized in that: The traction roller (2) comprises a roller body (21) and a fixed slot (22); the roller body (21) is connected to the inner side of the motor bracket (1) via a rotating shaft; the rotating shaft of the roller body (21) is connected to the output end of the torque motor (3); the fixed slot (22) is provided on the outer side of the roller body (21); and the fixed slot (22) is adapted to the size of the fixed rod (432).

7. A rapid quality detection device for F-type socket-and-spigot joints according to claim 6, characterized in that: A limit baffle (211) is arranged outside the roller body (21), and the limit baffle (211) is arranged in a fan shape, and a plurality of groups of the limit baffles (211) are evenly distributed outside the roller body (21).

8. A method for using the F-type socket-and-spigot joint quality rapid detection device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1, installing a pipe segment socket steel collar at the end of a group of pipe segments, selecting a plurality of test points on the inner wall of the pipe segment socket steel collar, and installing a group of sandwich-type flexible patches (4) at each test point by adhesive; Step S2, cutting open the packaging layer of the sandwich-type flexible patch (4), docking one group of pipe segments with another group of pipe segments, the sandwich-type flexible patch (4) is sandwiched between the pipe segments and the pipe segment socket steel ring during the docking process of the two groups of pipe segments, at this time, the sandwich-type flexible patch is squeezed by the elastic sealing strip and the pipe segment socket steel ring, and the friction medium liquid in the oil cavity inside the packaging layer is pressurized and discharged along the drainage groove, so that the contact surface between the core layer and the friction layer is evenly distributed with the friction medium; Step S3, wrapping a fixing rod at the end of the core layer; Step S4: fix the motor bracket to the top of the segment, set the traction roller on the top of the motor bracket, connect the traction roller to the output end of the torque motor on the side of the motor bracket, and connect the torque motor to an external power supply and an external CNC terminal; Step S5, wrapping the core layer on the outer surface of the roller body, and clamping the fixing rod at the end of the core layer into the fixing groove on the roller body; Step S6, starting the torque motor, which drives the roller body to rotate at a constant angular velocity ω, and the roller body pulls and reels the core layer during the rotation process; Step S7, when the roller body pulls and reels the core layer, friction is generated between the core layer and the friction layer, and the output torque data of the torque motor is recorded and formed into a curve; Step S8, during the process of the core layer being drawn out from the middle of the friction layer, the output torque data of the torque motor is recorded and a torque data curve is formed, wherein the ordinate represents the instantaneous output torque of the torque motor and the abscissa represents the working time of the torque motor.

9. The method for using the F-type socket-and-spigot joint quality rapid detection device according to claim 8, characterized in that: Also includes: Step S9, calculating the contact stress and contact surface size of the sealing strip in combination with the torque data curve; Step S91: The F-type socket-and-spigot segment is provided with n sealing strips, the width of the core layer is b, and the radius of the roller body is r; Step S92: Analysis of the torque data curve shows that as the torque motor runs to time t1, the core layer is gradually extracted, and the friction force between the core layer and the friction layer gradually stabilizes from T0 to T1. The motor continues to rotate until time t2, and the core layer begins to be extracted from the first sealing strip. It continues to rotate until time t3, and the contact surface gradually decreases. The motor output torque gradually decreases to T2, and the core layer completely separates from the first sealing strip. The torque stabilizes to T2, and then the core layer passes through subsequent sealing strips in sequence. The torque decreases to T3 and Tn in sequence until it is completely extracted. The torque value at each stage is recorded. Step S93: within the width of the core layer, the actual contact stress of the nth (n≥1) sealing strip is: The actual contact area of the nth (n≥1) sealing strip is: rbω(t 2n -t 2n-1 ); Where μ is the friction coefficient and ω is the angular velocity of the motor.

10. The method for using the F-type socket-and-spigot joint quality rapid detection device according to claim 9, characterized in that: The friction coefficient μ is calibrated through experiments before the test begins.

Images