Steel arch body detection method

Abstract

This invention relates to a method for inspecting the main body of a steel arch frame, which is accomplished through a steel arch frame main body inspection mechanism. The mechanism includes a support base, a gap detection mechanism, an arc-shaped groove on the support base, and an end-face inspection mechanism. The radius of the arc-shaped groove is equal to the radius of the outer circumference of the steel arch frame main body. The gap detection mechanism includes an arc-shaped measuring plate, a comparison rod, and a comparison rod drive structure. The comparison rod has an arc-shaped groove on its circumference. All the arc-shaped grooves on the comparison rod are located at the same axial end of the arc-shaped groove. When the depth of the comparison rod extending into the arc-shaped groove is within a set range, the arc-shaped measuring plate can pass through the arc-shaped groove during its swing. When the depth of the comparison rod extending into the arc-shaped groove is outside the set range, the comparison rod is blocked in the swing path of the arc-shaped measuring plate. This invention has the advantage of being able to detect whether the radius and end face of the steel arch frame main body meet the requirements, solving the problem of the lack of equipment for inspecting the radius and end face of the steel arch frame main body.

Description

Technical Field

[0001] This invention relates to the field of tunnel material production technology, specifically to a method for testing the main body of a steel arch frame. Background Technology

[0002] During tunnel construction, steel arches are used to support the tunnel floor. A steel arch consists of a main arch body made of I-beams in an arc shape and connecting plates welded to both ends. In use, adjacent steel arches are joined together by the connecting plates, which are then fixed in place. The radius of the main steel arch body varies depending on the size of the tunnel, and different types of steel result in varying strength reductions after bending. Therefore, it is necessary to test the radius of the main steel arch body to ensure it meets requirements; otherwise, the arc of the joined arches will not match the tunnel's shape. The end faces of the main steel arch body also need to be tested to ensure they meet requirements, i.e., whether they are planes extending radially along the main body and passing through its axial direction. In addition to incoming inspection of the I-beams, the compressive strength of the main steel arch body also needs to be tested. Currently, there is a lack of testing equipment to verify the radius and end face compliance of the steel arches, making the testing process cumbersome. Summary of the Invention

[0003] The present invention aims to provide a method for detecting whether the main body radius and end face of a steel arch frame meet the requirements, thereby solving the problem of the lack of equipment for detecting the main body radius and end face of a steel arch frame.

[0004] The above technical problems are solved by the following technical solution: a method for detecting the main body of a steel arch frame, characterized in that it is accomplished by a steel arch frame main body detection mechanism, the steel arch frame main body detection mechanism including a support base, a gap detection mechanism, an arc-shaped groove disposed on the support base, and an end face detection mechanism located above the arc-shaped groove for detecting whether the end face of the steel arch frame main body is a plane extending radially along the main body of the steel arch frame and passing through the axial direction of the main body of the steel arch frame. The radius of the arc-shaped groove is equal to the radius of the outer circumference of the main body of the steel arch frame. The gap detection mechanism includes an arc-shaped measuring plate that can swing coaxially with the arc-shaped groove and is connected to the support base, a plurality of comparison rods that are radially extended along the extension direction of the arc-shaped groove and are inserted into the bottom wall of the arc-shaped groove at one end, and a comparison rod driving structure that drives the comparison rods to move toward the arc-shaped groove. The arc-shaped measuring plate is coaxial with the arc-shaped groove. The comparison rod has an arc-shaped groove on its circumference that is coaxial with the arc-shaped support groove. All the arc-shaped grooves on the comparison rod are located at the same end of the axial direction of the arc-shaped support groove. When the depth of the comparison rod extending into the arc-shaped support groove is within the set range, the arc-shaped measuring piece can pass through the arc-shaped groove when it swings. When the depth of the comparison rod extending into the arc-shaped support groove is outside the set range, the comparison rod is blocked in the swing path of the arc-shaped measuring piece. The detection process is as follows: the outer circumferential surface of the steel arch frame body is placed in the arc-shaped support groove with its outer circumferential surface facing the bottom wall of the arc-shaped support groove. The comparison rod is driven by the comparison rod drive structure to abut against the outer circumferential surface of the steel arch frame body, so that the arc-shaped measuring piece swings from one end of the arc-shaped support groove to the other end with the axis of the arc-shaped support groove as the axis. If it is not blocked by the comparison rod, it means that the curvature of the steel arch frame body meets the requirements. If it is blocked by the comparison rod, it means that the curvature of the steel arch frame body does not meet the requirements. Then, the end face inspection mechanism is used to check whether the end face of the steel arch frame body is a plane that extends radially along the steel arch frame body and passes through the axial direction of the steel arch frame body.

[0005] Preferably, the device also includes an arc-shaped guide rod located above the arc-shaped support groove and coaxial with the arc-shaped support groove. The arc-shaped guide rod has a polygonal cross-section. The arc-shaped measuring piece is connected to one end of a swing rod, and the other end of the swing rod is connected to a polygonal guide ring, which is fitted onto the arc-shaped guide rod. In use, the guide ring moves along the arc-shaped guide rod, allowing the arc-shaped measuring piece to swing from one end of the arc-shaped support groove to the other end, with the axis of the arc-shaped support groove as its axis. The movement trajectory is reliable.

[0006] Preferably, the comparison rod drive structure includes an oil distribution chamber connected below the arc-shaped support groove. The oil distribution chamber has an oil inlet and an oil outlet. The oil inlet is connected to the inlet of a hydraulic pump, and the oil outlet is connected to an oil tank via an oil outlet valve. The inlet of the hydraulic pump is also connected to the oil tank. The oil distribution chamber has sleeves that are correspondingly and slidably fitted onto the comparison rod. In use, with the oil valve closed, the hydraulic pump pressurizes the oil distribution chamber, causing the comparison rod to abut against the steel arch frame body. After successful testing, the hydraulic pump is stopped and the oil valve is opened to depressurize the oil distribution chamber.

[0007] Preferably, the end face detection mechanism includes a positioning block, a comparison plate, a connecting rod with one end connected to the comparison plate, a rotary cylinder connected to the other end of the connecting rod, and a lifting cylinder connected to the rotary cylinder. The comparison plate has a mirror layer on its surface facing the arc-shaped groove. In use, the lifting cylinder drives the rotary cylinder to descend until it abuts against the positioning block. Then, one end face of the steel arch frame is moved to abut against the mirror layer. The system then observes whether there is a gap between the end face of the steel arch frame and the mirror layer. If there is, it does not meet the requirements; otherwise, it does. The steel arch frame is then separated from the positioning block, and the rotary cylinder drives the comparison plate to rotate 180° to the other end of the steel arch frame. The steel arch frame is moved so that the other end face abuts against the mirror layer. The system then observes whether there is a gap between the other end face of the steel arch frame and the mirror layer. If there is a gap, it does not meet the requirements; otherwise, it does.

[0008] Preferably, the maximum rotation angle of the rotary cylinder is 180°. This allows for easy determination of whether the comparison plate is located at the end of the steel arch frame body.

[0009] Preferably, the support base includes a base frame and two support rollers mounted on the base frame, with both ends of the arc-shaped bracket supported on the two support rollers. In use, the arc-shaped bracket is moved along the circumference of the arc-shaped bracket on the support rollers to bring the end face of the steel arch frame body against the opposing plate.

[0010] Preferably, one of the support rollers is equipped with a driven gear, which meshes with a driving gear, and the driving gear is connected to a drive motor. In use, the drive motor drives the driven gear to rotate, which in turn drives the driving gear to rotate, thereby causing the support roller to rotate. The rotation of the support roller moves the arc-shaped support groove, thus realizing the movement of the main body of the steel arch frame.

[0011] Preferably, the extended mirror layer is black. In use, white powder is applied to the end face of the steel arch frame body. After the end face of the steel arch frame body is brought into contact with the mirror layer, the white powder is transferred to the mirror layer. The shape of the white powder imprint on the mirror layer is observed to match the shape of the end face of the steel arch frame body. If they match, the end face of the steel arch frame body meets the requirements; otherwise, it does not. This method facilitates determining whether the end face of the steel arch frame is properly mated to the opposing plate.

[0012] Preferably, the system also includes a pressing head and a pressing cylinder for driving the pressing head downwards. In use, the two ends of the steel arch frame body are positioned facing the support base. Then, the pressing cylinder drives the pressing head with a set force to press the middle of the steel arch frame body. The deformation of the steel arch frame body is observed. If deformation occurs, the driving mechanism of the steel arch frame body does not meet the requirements; otherwise, it does. To observe deformation, a significant deformation of the steel arch frame body is necessary. Excessive deformation will destroy the arc shape of the steel arch frame body, making it impossible to reinforce and reuse.

[0013] Preferably, a detection groove is provided in the middle of the outer circumference of the main body of the steel arch frame. The detection groove extends through both sides of the main body of the steel arch frame along its axial direction. A pressure detection switch is installed in the detection groove. The mounting end of the pressure detection switch is connected to one side wall of the detection groove, and the detection end abuts against the other side wall of the detection groove. When the main body of the steel arch frame deforms, the force detected by the pressure detection switch gradually increases, and then the pressing action is released, indicating that the main body of the steel arch frame does not meet the requirements. This allows the main body of the steel arch frame to be identified as non-compliant even when the deformation is small, enabling the main body of the steel arch frame to be reinforced and reused in the future.

[0014] The beneficial effects of this invention are: it can conveniently and quickly detect whether the radius and end face of the main body of the steel arch frame meet the requirements for inspection of the welded steel arch frame; it can also detect whether the strength of the steel arch frame meets the requirements without damaging the main body of the steel arch frame. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the main inspection mechanism for the steel arch frame; Figure 2 for Figure 1 A magnified view of a portion of point A; Figure 3 for Figure 1 A magnified view of a portion of point B; Figure 4 for Figure 1 A magnified view of a portion at point C; Figure 5 for Figure 1 A magnified view of a portion of point D.

[0016] In the diagram: 1. Support base; 2. Arc-shaped groove; 3. Arc-shaped measuring plate; 4. Comparison rod; 5. Arc-shaped groove; 6. Main body of steel arch frame; 7. Bottom wall of arc-shaped groove; 8. Arc-shaped guide rod; 9. Swing rod; 10. Guide ring; 11. Oil distribution chamber; 12. Oil inlet; 13. Oil outlet valve; 14. Sleeve; 15. Positioning block; 16. Comparison plate; 17. Connecting rod; 18. Rotary cylinder; 19. Lifting cylinder; 20. Mirror layer; 21. Base frame; 22. Support roller; 23. Driven gear; 24. Drive motor; 25. Pressing head; 26. Pressing cylinder; 27. Detection groove; 28. Pressure detection switch. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] See Figures 1 to 5A method for inspecting the main body of a steel arch frame is disclosed, which is accomplished by a steel arch frame main body inspection mechanism. The steel arch frame main body inspection mechanism includes a support base 1, a gap detection mechanism, an arc-shaped groove 2 disposed on the support base, and an end-face detection mechanism located above the arc-shaped groove for detecting whether the end face of the steel arch frame main body is a plane extending radially along the main body and passing through the axial direction of the main body. The radius of the inner surface of the bottom wall of the arc-shaped groove is equal to the radius of the outer circumference of the main body. The gap detection mechanism includes an arc-shaped measuring plate 3 that is oscillatingly connected to the support base coaxially with the arc-shaped groove, a plurality of comparison rods 4 extending radially along the extension direction of the arc-shaped groove and inserted at one end into the bottom wall of the arc-shaped groove, and a comparison rod driving structure for driving the comparison rods to move toward the arc-shaped groove. The arc-shaped measuring plate is coaxial with the arc-shaped groove. The comparison rod has an arc-shaped groove 5 coaxial with the arc-shaped support groove on its circumferential surface. All the arc-shaped grooves on the comparison rod are located at the same end of the axial direction of the arc-shaped support groove. When the depth of the comparison rod extending into the arc-shaped support groove is within the set range, the arc-shaped measuring piece can swing through the arc-shaped groove. When the depth of the comparison rod extending into the arc-shaped support groove is outside the set range, the comparison rod blocks the swing path of the arc-shaped measuring piece. In use, the steel arch frame body 29 is placed in the arc-shaped support groove with its outer circumferential surface facing the bottom wall 6 of the arc-shaped support groove. The comparison rod is driven by the comparison rod drive structure to abut against the outer circumferential surface of the steel arch frame body, so that the arc-shaped measuring piece swings from one end of the arc-shaped support groove to the other end with the axis of the arc-shaped support groove as the axis. If it is not blocked by the comparison rod, it means that the curvature of the steel arch frame body meets the requirements. If it is blocked by the comparison rod, it means that the curvature of the steel arch frame body does not meet the requirements. Then, the end face detection mechanism detects whether the end face of the steel arch frame body is a plane that extends radially along the steel arch frame body and passes through the axial direction of the steel arch frame body. It also includes an arc-shaped guide rod 7 located above the arc-shaped support groove and coaxial with the arc-shaped support groove. The arc-shaped guide rod has a polygonal cross-section. The arc-shaped measuring piece is connected to one end of the swing rod 8, and the other end of the swing rod is connected to a polygonal guide ring 9, which is sleeved on the arc-shaped guide rod. In use, the guide ring moves along the arc-shaped guide rod to make the arc-shaped measuring piece swing from one end of the arc-shaped support groove to the other end with the axis of the arc-shaped support groove as the axis. The comparison rod drive structure includes an oil distribution chamber 10 connected below the arc-shaped support groove. The oil distribution chamber has an oil inlet 11 and an oil outlet. The oil inlet is connected to the inlet of the hydraulic pump, and the oil outlet is connected to the oil tank through an oil outlet valve 12. The inlet of the hydraulic pump is also connected to the oil tank. The oil distribution chamber has sleeves 13 that are correspondingly and slidably sleeved on the comparison rod. In use, with the oil valve closed, the hydraulic pump supplies oil to the oil distribution chamber to pressurize it, so that the comparison rod abuts against the main body of the steel arch frame. After the inspection is completed, the hydraulic pump is stopped and the oil outlet valve is opened to release the pressure in the oil distribution chamber. The end face inspection mechanism includes a positioning block 14, a comparison plate 15, a connecting rod 16 connected to the comparison plate at one end, a rotary cylinder 17 connected to the other end of the connecting rod, and a lifting cylinder 18 connected to the rotary cylinder. A mirror layer 19 is provided on the side surface of the comparison plate facing the arc-shaped support groove.In use, the lifting cylinder drives the rotating cylinder to descend and abut against the positioning block. Then, one end face of the steel arch frame is moved to abut against the mirror layer. The gap between the end face of the steel arch frame and the mirror layer is then observed; if there is a gap, it does not meet the requirements; otherwise, it does. The steel arch frame is then separated from the positioning block. The rotating cylinder drives the alignment plate to rotate 180° to the other end of the steel arch frame. The steel arch frame is then moved so that the other end face abuts against the mirror layer. The gap between the other end face of the steel arch frame and the mirror layer is then observed; if there is a gap, it does not meet the requirements; otherwise, it does. The maximum rotation angle of the rotating cylinder is 180°. The support base includes a base frame 20 and two support rollers 21 mounted on the base frame. The lifting cylinder and the positioning block are both connected to the base frame. The two ends of the arc-shaped support groove are supported on the two support rollers. In use, the end face of the steel arch frame is moved along the circumference of the arc-shaped support groove on the support rollers to abut against the alignment plate. A driven gear 22 is mounted on a support roller, meshing with a driving gear 23. The driving gear is connected to a drive motor 24. In use, the drive motor drives the driven gear to rotate, which in turn drives the driving gear, causing the support roller to rotate. This rotation of the support roller moves the arc-shaped support groove, thus moving the main body of the steel arch frame. The mirror layer is black. In use, white powder is applied to the end face of the main body of the steel arch frame. After the end face of the main body of the steel arch frame comes into contact with the mirror layer, the white powder is transferred to the mirror layer. By observing whether the white powder imprint on the mirror layer matches the shape of the end face of the main body of the steel arch frame, if they match, the end face of the main body of the steel arch frame meets the requirements; otherwise, it does not.

[0019] It also includes a pressing head 25 and a pressing cylinder 26 that drives the pressing head to descend. The pressing cylinder is also connected to the base frame. In use, the two ends of the steel arch frame body are supported downwards on the support base. Then, the pressing cylinder drives the pressing head to press the middle of the steel arch frame body with a set force. Observe whether the steel arch frame body is deformed. If it is deformed, the steel arch frame body does not meet the requirements; otherwise, it does. At this time, in order to observe whether there is deformation, the steel arch frame body needs to deform by a large amount. If the deformation of the steel arch frame body is large, the arc of the steel arch frame body will be destroyed, and it cannot be reinforced and reused. To this end, the following further improvement was made: a detection groove 27 is provided in the middle of the outer circumference of the steel arch frame body. The detection groove runs through the two sides of the steel arch frame body along the axial direction. A pressure detection switch 28 is provided in the detection groove. The mounting end of the pressure detection switch is connected to one side wall of the detection groove, and the detection end is abutted against the other side wall of the detection groove. When the steel arch frame body deforms, the force detected by the pressure detection switch will gradually increase, thereby indicating that the steel arch frame body does not meet the requirements. It is possible to detect when the deformation of the main body of the steel arch frame is small that the main body of the steel arch frame does not meet the requirements, so that the main body of the steel arch frame can be reinforced and utilized in the future.

Claims

1. A method for inspecting the main body of a steel arch frame, characterized in that, This is accomplished through a steel arch frame main body inspection mechanism. The steel arch frame main body inspection mechanism includes a support base, a gap detection mechanism, an arc-shaped groove on the support base, and an end-face inspection mechanism located above the arc-shaped groove for detecting whether the end face of the steel arch frame main body is a plane extending radially along the main body and passing through its axial direction. The radius of the arc-shaped groove is equal to the radius of the outer circumference of the steel arch frame main body. The gap detection mechanism includes an arc-shaped measuring plate that can swing coaxially with the arc-shaped groove and is connected to the support base; several comparison rods extending radially along the arc-shaped groove's extension direction, one end of which is inserted into the bottom wall of the arc-shaped groove; and a comparison rod driving structure that drives the comparison rods to move towards the arc-shaped groove. The arc-shaped measuring plate is coaxial with the arc-shaped groove, and the circumference of the comparison rods is coaxial with the arc-shaped groove. The arc-shaped grooves on all the comparison rods are located at the same end of the axial direction of the arc-shaped support groove. When the depth of the comparison rod extending into the arc-shaped support groove is within the set range, the arc-shaped measuring piece can pass through the arc-shaped groove when it swings. When the depth of the comparison rod extending into the arc-shaped support groove is outside the set range, the comparison rod is blocked in the swing path of the arc-shaped measuring piece. The detection process is as follows: the steel arch frame body is placed in the arc-shaped support groove with its outer peripheral surface facing the bottom wall of the arc-shaped support groove. The comparison rod is driven by the comparison rod drive structure to abut against the outer peripheral surface of the steel arch frame body, so that the arc-shaped measuring piece swings from one end of the arc-shaped support groove to the other end with the axis of the arc-shaped support groove as the axis. If it is not blocked by the comparison rod, it means that the curvature of the steel arch frame body meets the requirements. If it is blocked by the comparison rod, it means that the curvature of the steel arch frame body does not meet the requirements.

2. The method for detecting the main body of a steel arch frame according to claim 1, characterized in that, It also includes an arc-shaped guide rod located above the arc-shaped support groove and coaxial with the arc-shaped support groove. The cross-section of the arc-shaped guide rod is polygonal. The arc-shaped measuring piece is connected to one end of the swing rod. The other end of the swing rod is connected to a polygonal guide ring. The guide ring is sleeved on the arc-shaped guide rod. During detection, the guide ring is moved along the arc-shaped guide rod to make the arc-shaped measuring piece swing from one end of the arc-shaped support groove to the other end with the axis of the arc-shaped support groove as the axis.

3. A method for detecting the main body of a steel arch frame according to claim 1 or 2, characterized in that, The comparison rod drive structure includes an oil distribution chamber connected below the arc-shaped support groove. The oil distribution chamber has an oil inlet and an oil outlet. The oil inlet is connected to the inlet of a hydraulic pump, and the oil outlet is connected to an oil tank through an oil outlet valve. The inlet of the hydraulic pump is also connected to the oil tank. The oil distribution chamber has sleeves that are correspondingly and slidably fitted onto the comparison rod. During testing, with the oil valve closed, the hydraulic pump supplies oil to the oil distribution chamber to increase the pressure, thereby enabling the comparison rod to abut against the main body of the steel arch frame. After the test is completed, the hydraulic pump is stopped and the oil valve is opened to release the pressure in the oil distribution chamber.

4. A method for detecting the main body of a steel arch frame according to claim 1 or 2, characterized in that, The end face inspection mechanism includes a positioning block, a comparison plate, a connecting rod connected to the comparison plate at one end, a rotary cylinder connected to the other end of the connecting rod, and a lifting cylinder connected to the rotary cylinder. The comparison plate has a mirror layer on the side surface facing the arc-shaped support groove. During inspection, the rotary cylinder is driven by the lifting cylinder to descend and abut against the positioning block. One end face of the steel arch frame is moved to abut against the mirror layer. It is observed whether there is a gap between the end face of the steel arch frame and the mirror layer. If there is a gap, it does not meet the requirements; if not, it meets the requirements. The steel arch frame is then separated from the positioning block. The rotary cylinder drives the comparison plate to rotate 180° to the other end of the steel arch frame. The steel arch frame is moved so that the other end face abuts against the mirror layer. Then, it is observed whether there is a gap between the other end face of the steel arch frame and the mirror layer. If there is a gap, it does not meet the requirements; if not, it meets the requirements.

5. The method for detecting the main body of a steel arch frame according to claim 4, characterized in that, The maximum rotation angle of the rotary cylinder is 180°.

6. The method for detecting the main body of a steel arch frame according to claim 4, characterized in that, The support base includes a base frame and two support rollers mounted on the base frame. The two ends of the arc-shaped support groove are supported on the two support rollers. In use, the arc-shaped support groove is moved along the circumference of the arc-shaped support groove on the support rollers to make the end face of the steel arch frame body abut against the corresponding plate.

7. The method for detecting the main body of a steel arch frame according to claim 6, characterized in that, One of the support rollers is equipped with a driven gear, which meshes with a driving gear. The driving gear is connected to a drive motor. In use, the drive motor drives the driven gear to rotate, and the driven gear drives the driving gear to rotate, thereby causing the support roller to rotate. The rotation of the support roller moves the arc-shaped support groove, thereby realizing the movement of the main body of the steel arch frame.

8. The method for detecting the main body of a steel arch frame according to claim 4, characterized in that, The mirror layer is black. In use, white powder is applied to the end face of the steel arch frame body. After the end face of the steel arch frame body comes into contact with the mirror layer, the white powder is transferred to the mirror layer. By observing whether the white powder imprint on the mirror layer is consistent with the shape of the end face of the steel arch frame body, if they are consistent, it means that the end face of the steel arch frame body meets the requirements; otherwise, it does not meet the requirements.

9. A method for detecting the main body of a steel arch frame according to claim 1 or 2, characterized in that, It also includes a pressing head and a pressing cylinder that drives the pressing head to descend. During testing, the two ends of the main body of the steel arch frame are supported on the support base with their ends facing down. Then, the pressing cylinder drives the pressing head to press the middle of the main body of the steel arch frame with a set force. Observe whether the main body of the steel arch frame is deformed. If it is deformed, the driving of the main body of the steel arch frame does not meet the requirements; otherwise, it meets the requirements.

10. A method for detecting the main body of a steel arch frame according to claim 9, characterized in that, A detection groove is provided in the middle of the outer circumference of the main body of the steel arch frame. The detection groove runs through the two sides of the main body of the steel arch frame along the axial direction. A pressure detection switch is provided in the detection groove. The mounting end of the pressure detection switch is connected to one side wall of the detection groove, and the detection end is abutted against the other side wall of the detection groove. During the detection process, when the main body of the steel arch frame deforms, the force detected by the pressure detection switch will gradually increase, and then the pressing action will be released.

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