A device for quickly detecting the quality of an F-type socket pipe joint and a method of use

Abstract

The application relates to the field of underground tunnel engineering quality detection, in particular to a F-shaped socket pipe piece joint quality rapid detection device and a use method, which comprises a motor support, a traction roller, a torque motor and a sandwich flexible patch, the motor support is arranged on the top of a pipe piece and kept fixed, the traction roller is arranged on the top end of the motor support, the torque motor is arranged outside the motor support, the output shaft of the torque motor is connected with the rotating shaft of the traction roller, one end of the sandwich flexible patch is arranged in the joint between a pipe piece steel sleeve and a pipe piece joint sleeve, the other end of the sandwich flexible patch is connected with the traction roller, the torque motor drives the traction roller to rotate, the traction roller pulls the sandwich flexible patch to pull out the sandwich flexible patch from the joint between the pipe piece steel sleeve and the pipe piece joint sleeve, the pipe piece which does not meet the requirements can be adjusted in time, the accuracy of the measurement data is improved, and the measurement data has timeliness.

Description

Technical Field

[0001] This invention relates to the field of quality inspection in underground tunnel engineering, specifically to a rapid quality inspection device for F-type socket-type segment joints and its usage method. Background Technology

[0002] The F-type socket-type segment joint, as a core connecting component of underground tunnel segments, relies primarily on the tight contact between an elastic sealing strip adhered to the inner concrete socket and the outer steel collar socket to achieve sealing of the segment joint. The magnitude of the contact stress and the size of the contact area directly determine the joint's waterproof sealing performance and structural stability. Furthermore, based on engineering experience, if the rubber strip flips during segment jacking, even if the interface stress meets requirements, the connection between the elastic rubber pad and the steel collar is incomplete, with a significantly smaller contact area than normal. Therefore, the interface stress of the elastic rubber pad and the actual contact area are crucial factors in determining the joint's waterproof sealing performance and structural stability. The contact area needs to be tested and controlled as an important indicator of the quality of tunnel segment installation. The factors affecting the contact stress and area of ​​the tunnel segment sealing interface mainly come from the effects of processing size error, jacking installation quality, and uneven soil settlement. Once the tunnel segment enters the soil layer, it is basically difficult to adjust the contact state of the tunnel segment through manual intervention. If the contact state of the F-type socket joint of each tunnel segment can be tested in time before the tunnel segment enters the soil layer, the contact state of the tunnel segment can be adjusted in time. If the tunnel segment that does not meet the requirements is found to be unsatisfactory, it is of great significance for ensuring the sealing effect and project safety.

[0003] Traditional detection methods, such as those using embedded sensors, are expensive in terms of both economy and time, and are complex and time-consuming to operate. They are not suitable for comprehensive detection of the contact status of all pipe segments, resulting in a lack of timeliness in the measurement results. Therefore, a rapid detection device for the quality of F-type socket-type pipe segment joints and its usage method are proposed. Utility Model Content

[0004] To address the technical problems existing in the prior art, the present invention provides a rapid quality testing device for F-type socket-type segment joints and a method for using it.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a rapid quality detection device for F-type socket-type segment joints, comprising a motor bracket, a traction roller, a torque motor, and a sandwich-type flexible patch;

[0006] The motor bracket is mounted on top of the tube segment and kept fixed;

[0007] The traction roller is mounted on the top of the motor bracket, the torque motor is located on the outside of 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 flexible patch is disposed in the joint between the steel collar of the segment socket and the segment joint sleeve, and the other end of the sandwich 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 pull the sandwich flexible patch out from the joint between the steel collar of the segment socket and the segment joint sleeve.

[0010] Preferably, the sandwich flexible patch includes an encapsulation layer, a friction layer, a core layer, and an oil cavity. The encapsulation layer is adhered to the inner surface of the steel collar of the tube segment socket by an elastic sealing strip. Two sets of friction layers are evenly adhered to the inner surfaces on both sides of the encapsulation layer. The core layer is disposed between the two sets of friction layers. The surface of the friction layer is smoothed. The encapsulation layer is sealed around its perimeter by heat treatment to form an oil cavity, and the oil cavity is filled with a friction medium.

[0011] Preferably, the encapsulation layer is composed of a polymer film, and the friction medium is selected from silicone oil or nano silica suspension.

[0012] Preferably, the core layer surface is provided with drainage grooves, and there are several groups of drainage grooves, with adjacent groups of drainage grooves spaced at the same interval, 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 fixing slot. The roller body is connected to the inner side of the motor bracket via a rotating shaft. The rotating shaft of the roller body is connected to the output end of the torque motor. The fixing slot is opened on the outer side of the roller body and is adapted to the size of the fixing rod.

[0015] Preferably, a limiting baffle is provided on the outer side of the roller body, the limiting baffle is configured as a fan shape, and several sets of the limiting baffles are evenly distributed on the outer side of the roller body.

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

[0017] Step S1: Install steel sleeves for the socket of a set of segments at the end of the segment. Select several test points on the inner wall of the steel sleeves for the socket of the segment. Install a set of sandwich flexible patches at each test point using elastic sealing strips.

[0018] Step S2: Cut open the encapsulation layer of the sandwich flexible patch, and connect one set of tubes to another set of tubes. During the connection of the two sets of tubes, the sandwich flexible patch is sandwiched between the tube and the steel sleeve of the tube socket. At this time, the sandwich flexible patch is squeezed by the elastic sealing strip and the steel sleeve of the tube socket. The friction medium liquid in the oil cavity inside the encapsulation layer is pressurized and discharged along the drain groove, so that the contact surface between the core layer and the friction layer is evenly distributed with friction medium.

[0019] Step S3: Wrap a fixing rod around 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 torque motor output end on the side of the motor bracket, and connect the torque motor to the external power supply and the external CNC terminal.

[0021] Step S5: Wrap the core layer around the outer surface of the roller body and snap the fixing rod at the end of the core layer into the fixing groove on the roller body;

[0022] Step S6: Start the torque motor, which drives the roller body at a constant angular velocity. As the roller rotates, it pulls and winds up the core layer.

[0023] Step S7: During the traction and winding of the core layer by the roller body, friction is generated between the core layer and the friction layer. The output torque data of the torque motor is recorded and a curve is formed.

[0024] Step S8: During the process of the core layer being extracted from the middle of the friction layer, the output torque data of the torque motor is recorded and a torque data curve is formed. The vertical axis represents the instantaneous output torque of the torque motor, and the horizontal axis represents the working time of the torque motor.

[0025] Preferred options also include:

[0026] Step S9: Calculate the contact stress and contact surface size of the sealing strip by combining the torque data curve;

[0027] Step S91: The F-type socket-type tube 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 between the core layer and the friction layer gradually stabilizes from T0 to T1. The motor continues to rotate until time t2, when the core layer begins to be extracted from the first sealing strip. As it continues to rotate until time t3, the contact area 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 at T2. Subsequently, the core layer passes through the subsequent sealing strips in sequence, and the torque decreases sequentially to T3 and Tn until it is completely extracted. The torque values ​​at each stage are recorded.

[0029] Step S93, within the core layer width range, 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] ;

[0033] In the formula The coefficient of friction, This represents the angular velocity of the motor.

[0034] Preferably, the coefficient of friction Calibration is performed through experiments before the testing begins.

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

[0036] This invention comprises 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 tractions and winds up the core layer. During the traction and winding process, the core layer is pulled, causing friction between the core layer and the friction layer. As the core layer is pulled out from the middle of the friction layer, the output torque data of the torque motor is recorded. Before the segment enters the soil layer, the contact state of the F-type socket joint of each segment is detected in time, allowing for timely adjustment of the segment contact state. The recorded data is calculated and analyzed, and segments that do not meet the requirements can be adjusted in time, improving the accuracy and timeliness of the measurement data.

[0037] This solution eliminates the need for drilling or cutting on the surface of the tunnel segments, thus avoiding disruption of 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 also includes a traction roller comprising a roller body and a fixing slot. The roller body is connected to the inner side of the motor bracket via a rotating shaft, and the rotating shaft of the roller body is connected to the output end of the torque motor. The fixing slot is located on the outer side of the roller body and is adapted to the size of the fixing rod. The fixing slot engages with the fixing rod to connect the end of the core layer to the roller body. A limit baffle is provided on the outer side of the roller body. The limit baffle is fan-shaped and several sets of limit baffles are evenly distributed on the outer side of the roller body. The limit baffles limit the edge of the core layer to prevent the core layer from shifting during the rotation of the roller body, thus affecting the final measurement data results.

[0039] The encapsulation layer of the sandwich flexible patch can be filled with a specific friction medium to adjust the friction coefficient between the friction layer and the core layer, so as to adapt to different friction force ranges, and has strong adaptability and flexibility. Attached Figure Description

[0040] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0041] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0042] Figure 2 This is a schematic diagram illustrating the usage state of the present invention;

[0043] Figure 3 This is a schematic cross-sectional view of the sandwich-type flexible patch structure 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 This is a side view of the structure of the present invention;

[0046] Figure 6 This is a three-dimensional structural diagram of the traction roller of the present invention;

[0047] Figure 7 A frontal view illustration of the usage state of the present invention. Figure 1 ;

[0048] Figure 8 A frontal view illustration of the usage state of the present invention. Figure 2 ;

[0049] Figure 9 This is a graph showing the torque data of the present invention.

[0050] The numbers in the image represent:

[0051] 1. Motor bracket; 2. Traction roller; 21. Roller body; 22. Fixing slot; 211. Limiting baffle; 3. Torque motor; 4. Sandwich flexible patch; 41. Encapsulation layer; 42. Friction layer; 43. Core layer; 431. Drainage groove; 432. Fixing rod; 44. Oil cavity. Detailed Implementation

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

[0053] Example:

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

[0055] Motor bracket 1 is mounted on top of the segment and kept in place;

[0056] The traction roller 2 is mounted on the top of the motor bracket 1, and the torque motor 3 is located on the outside of the motor bracket 1. 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 flexible patch 4 is placed inside the joint between the steel collar of the segment socket and the segment joint sleeve, and the other end of the sandwich flexible patch 4 is connected to the traction roller 2.

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

[0059] The encapsulation layer 41 is attached to the inner surface of the steel collar by an elastic sealing strip. The encapsulation layer 41 is made of a high-strength, oil-resistant, wear-resistant molecular film such as PP or PET. The encapsulation layer 41 forms an oil cavity 44 inside the sealed encapsulation layer 41. The oil cavity 44 is filled with a friction medium, which is either silicone oil or nano silica suspension. The friction layer 42 is evenly attached to the inner surfaces of both sides of the encapsulation layer 41. The core layer 43 is located between the two sets of friction layers 42. Both the friction layer 42 and the core layer 43 are 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. The friction coefficient between the friction layer 42 and the core layer 43 is adjusted by the friction medium in the oil cavity 44 to suit different friction ranges.

[0060] The core layer 43 has a drain groove 431 on its surface. Several sets of drain grooves 431 are provided. The interval between two adjacent sets of drain grooves 431 is the same. The drain grooves 431 are parallel to the edge of the core layer 43. The liquid in the oil cavity 44 is drawn out through the drain grooves 431 to keep the friction 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 at the end of the core layer 43.

[0062] The traction roller 2 includes a roller body 21 and a fixing 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 fixing slot 22 is opened on the outer side of the roller body 21. The fixing slot 22 is adapted to the size of the fixing rod 432. The fixing slot 22 is engaged with the fixing rod 432, so that the end of the core layer 43 is connected to the roller body 21.

[0063] A limiting baffle 211 is provided on the outer side of the roller body 21. The limiting baffle 211 is fan-shaped and several sets of limiting baffles 211 are evenly distributed on the outer side of the roller body 21. The limiting baffle 211 limits the edge of the core layer 43 to prevent the core layer 43 from shifting during the rotation of the roller body 21, which would affect the final measurement data results.

[0064] Instructions for using the F-type socket-type segment joint quality rapid testing device:

[0065] A steel sleeve for the socket of a segment is installed at the end of a set of segments. Several test points are selected on the inner wall of the steel sleeve for the socket of the segment. A set of sandwich flexible patch 4 is installed at each test point through an elastic sealing strip. The encapsulation layer of the sandwich flexible patch 4 is cut open, and a set of segments is connected to another set of segments. During the connection of the two sets of segments, the sandwich flexible patch 4 is sandwiched between the segment and the steel sleeve for the socket of the segment. At this time, the sandwich flexible patch is squeezed by the elastic sealing strip and the steel sleeve for the socket of the segment. The friction medium liquid in the oil cavity inside the encapsulation layer is discharged along the drainage groove under pressure, so that the contact surface between the core layer and the friction layer is evenly distributed with friction medium.

[0066] A fixing rod is wrapped around the end of the core layer, the motor bracket is fixed to the top of the tube segment, the traction roller is set on the top of the motor bracket, and the traction roller is connected to the torque motor output end on the side of the motor bracket. The torque motor is connected to an external power supply and an external CNC terminal. The core layer is wrapped around the outer surface of the roller body, and the fixing rod at the end of the core layer is snapped into the fixing slot on the roller body.

[0067] Start the torque motor, which drives the roller body at a constant angular velocity. During the rotation of the roller body, the core layer is pulled and wound up. Friction is generated between the core layer and the friction layer during the pulling and winding process of the roller body. The output torque data of the torque motor is recorded and a curve is formed. 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 a torque data curve is formed. The vertical axis of the figure represents the instantaneous output torque of the torque motor, and the horizontal axis of the figure represents the working time of the torque motor.

[0068] The contact stress and contact surface size of the sealing strips were calculated by combining the torque data curve. The F-type socket tube segment has a total of 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. The friction between the core layer and the friction layer gradually stabilizes from T0 to T1. The motor continues to rotate until time t2, when the core layer begins to be pulled out from the first sealing strip. As it continues to rotate until 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 at T2. Subsequently, the core layer passes through the subsequent sealing strips in sequence, and the torque decreases to T3, Tn, and so on until it is completely pulled out. The torque values ​​at each stage are recorded.

[0069] Within the core layer width, 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] ;

[0073] In the formula The coefficient of friction, This represents the angular velocity of the motor.

[0074] coefficient of friction Calibration is performed through experiments before the testing begins.

[0075] The above description is merely a preferred embodiment of the present invention and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.

Claims

1. A rapid quality testing device for F-type socket-type segment joints, characterized in that, It includes a motor bracket (1), a traction roller (2), a torque motor (3), and a sandwich flexible patch (4); The motor bracket (1) is placed on top of the tube segment and kept fixed; The traction roller (2) is mounted on the top of the motor bracket (1), and the torque motor (3) is located on the outside of the motor bracket (1). The output shaft of the torque motor (3) is connected to the rotating shaft of the traction roller (2). One end of the sandwich flexible patch (4) is sandwiched between the steel sleeve of the pipe segment socket and the pipe segment, and is squeezed by the elastic sealing strip and the steel sleeve of the pipe segment socket. The other end of the sandwich flexible patch (4) is connected to the traction roller (2). The sandwich flexible patch (4) includes an encapsulation layer (41), a friction layer (42), a core layer (43), and an oil cavity (44). The encapsulation layer (41) is attached to the inner surface of the steel collar of the tube socket by an elastic sealing strip. Two sets of friction layers (42) are evenly attached to the inner surfaces on both sides of the encapsulation layer (41). The core layer (43) is located between the two sets of friction layers (42). The surface of the friction layer (42) is smoothed. The encapsulation layer (41) is sealed around its perimeter by heat treatment to form an oil cavity (44). The oil cavity (44) is filled with a friction medium. The torque motor (3) drives the traction roller (2) to rotate, and the traction roller (2) pulls the sandwich flexible patch (4) to pull the sandwich flexible patch (4) out from the joint between the steel sleeve of the pipe segment socket and the pipe segment joint sleeve.

2. The rapid quality testing device for F-type socket-type segment joints as described in claim 1, characterized in that, The encapsulation layer (41) is composed of a polymer film, and the friction medium is selected from either silicone oil or nano silica suspension.

3. The rapid quality testing device for F-type socket-type segment joints as described in claim 1, characterized in that, The core layer (43) has a drainage groove (431) on its surface. Several sets of drainage grooves (431) are provided. The interval between two adjacent sets of drainage grooves (431) is the same. The drainage grooves (431) are parallel to the edge of the core layer (43).

4. The rapid quality testing device for F-type socket-type segment joints as described in claim 3, 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).

5. The rapid quality testing device for F-type socket-type segment joints as described in claim 1, characterized in that, The traction roller (2) includes a roller body (21) and a fixing slot (22). The roller body (21) is connected to the inside 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 fixing slot (22) is opened on the outside of the roller body (21). The fixing slot (22) is adapted to the size of the fixing rod (432).

6. The rapid quality testing device for F-type socket-type segment joints as described in claim 5, characterized in that, A limiting baffle (211) is provided on the outside of the roller body (21). The limiting baffle (211) is fan-shaped and several sets of the limiting baffle (211) are evenly distributed on the outside of the roller body (21).

7. A method of using the rapid quality testing device for F-type socket-type segment joints according to any one of claims 1-6, characterized in that: Includes the following steps: Step S1: Install steel sleeves for the socket of a set of segments at the end of the segment. Select several test points on the inner wall of the steel sleeves for the socket of the segment. Install a set of sandwich flexible patches at each test point using elastic sealing strips. Step S2: Cut open the encapsulation layer of the sandwich flexible patch, and connect one set of tubes to another set of tubes. During the connection of the two sets of tubes, the sandwich flexible patch is sandwiched between the tube and the steel sleeve of the tube socket. At this time, the sandwich flexible patch is squeezed by the elastic sealing strip and the steel sleeve of the tube socket. The friction medium liquid in the oil cavity inside the encapsulation layer is pressurized and discharged along the drain groove, so that the contact surface between the core layer and the friction layer is evenly distributed with friction medium. Step S3: Wrap a fixing rod around 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 torque motor output end on the side of the motor bracket, and connect the torque motor to the external power supply and the external CNC terminal. Step S5: Wrap the core layer around the outer surface of the roller body and snap the fixing rod at the end of the core layer into the fixing groove on the roller body; Step S6: Start the torque motor, which drives the roller body at a constant angular velocity. As the roller rotates, it pulls and winds up the core layer. Step S7: During the traction and winding of the core layer by the roller body, friction is generated between the core layer and the friction layer. The output torque data of the torque motor is recorded and a curve is formed. Step S8: During the process of the core layer being extracted from the middle of the friction layer, the output torque data of the torque motor is recorded and a torque data curve is formed. The vertical axis represents the instantaneous output torque of the torque motor, and the horizontal axis represents the working time of the torque motor.

8. The method of using the F-type socket joint quality rapid testing device according to claim 7, characterized in that: Also includes: Step S9: Calculate the contact stress and contact surface size of the sealing strip by combining the torque data curve; Step S91: The F-type socket-type tube 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 between the core layer and the friction layer gradually stabilizes from T0 to T1. The motor continues to rotate until time t2, when the core layer begins to be extracted from the first sealing strip. As it continues to rotate until time t3, the contact area 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 at T2. Subsequently, the core layer passes through the subsequent sealing strips in sequence, and the torque decreases sequentially to T3 and Tn until it is completely extracted. The torque values ​​at each stage are recorded. Step S93, within the core layer width range, the actual contact stress of the nth (n≥1) sealing strip is: ； The actual contact area of ​​the nth (n≥1) sealing strip is: ； In the formula The coefficient of friction, This represents the angular velocity of the motor.

9. The method of using the F-type socket joint quality rapid testing device according to claim 8, characterized in that: The coefficient of friction Calibration is performed through experiments before the testing begins.

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