A force monitoring device for the open-hole roof slab structure of a top-down excavated and reverse-constructed station

Abstract

The present invention discloses a stress monitoring device for an open - hole top plate structure of a covered - excavation inverse - construction station, which relates to the technical field of civil engineering. The device includes a main body of the stress monitoring device, on which a detection head is installed. A handle is installed on the outer wall of the detection head. Further, a sleeve is installed on the outer wall of the handle. A plurality of strip - shaped openings are formed on the outer wall of the sleeve, and the strip - shaped openings extend along the axial direction of the sleeve. A support plate and a slider are arranged inside the strip - shaped openings. In the present invention, when the detection head is placed into the gap to be detected, the handle also enters accordingly. The right end of the support plate is fixed in the strip - shaped opening, and the left end can move horizontally back and forth and is fixed on the slider. The slider can slide in the strip - shaped opening. When the slider moves to the right, the left end of the support plate approaches the right end and gradually bends and protrudes, and stops when it touches the inner wall of the gap. The bent support plate is stuck in the gap to fix the handle and the detection head, and the bending degree can be adjusted as needed to make the detection head stable in the gap.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering, and particularly to a stress monitoring device for the open - hole roof structure of a top - down excavated station. Background Technique

[0002] The stress monitoring device for the open - hole roof structure of a top - down excavated station is mainly used to monitor the stress state and deformation of the roof and support structure during the construction process in real - time, ensure the structural safety and optimize the construction process. Its core function is to dynamically monitor parameters such as stress and displacement of key parts through sensors and data acquisition systems, so as to prevent the risk of structural failure and provide a scientific basis for construction adjustment.

[0003] During construction or operation, the open - hole roof is prone to cracks due to stress concentration, settlement difference, etc. These cracks are important indicators of structural safety. During monitoring, sensors need to be embedded inside the cracks to directly monitor the width change, strain distribution and propagation rate of the cracks, so as to evaluate the damage degree of the structure in real - time;

[0004] After the monitoring head of the stress monitoring device is inserted into the gap, the structure will produce small displacements due to disturbance, and it is necessary to wait for 1 - 2 hours for the initial deformation to stabilize to avoid the influence of dynamic changes on the reference value. During this process, the user needs to hold the monitoring head. Since maintaining a fixed posture for a long time is likely to cause hand tremors or muscle strain, which will lead to the displacement or poor contact of the monitoring head. Therefore, in the prior art, a fixing frame is usually required to assist in fixing the monitoring head;

[0005] However, it has a defect that due to the different positions of the cracks and the surrounding terrain, not all terrains are suitable for the placement and installation of the fixing frame. Therefore, the adhesion between the fixing frame and the structure surface will be reduced, making the fixing frame easy to loosen and shift, and then leading to the displacement and instability of the monitoring head. Summary of the Invention

[0006] The purpose of the present invention is to provide a stress monitoring device for the open - hole roof structure of a top - down excavated station to solve the problem that due to the different positions of the cracks and the surrounding terrain, not all terrains are suitable for the placement and installation of the fixing frame, so the adhesion between the fixing frame and the structure surface is reduced, making the fixing frame easy to loosen and shift, and then leading to the displacement and instability of the monitoring head as mentioned in the above background technique.

[0007] To solve the above - mentioned technical problems, a stress monitoring device for the open - hole roof structure of a top - down excavated station provided by the present invention includes a main body of the stress monitoring device. A detection head is installed on the main body of the stress monitoring device, and a handle is installed on the outer wall of the detection head. It further includes:

[0008] A sleeve is installed on the outer wall of the handle. A plurality of strip-shaped openings are formed in the outer wall of the sleeve. The strip-shaped openings extend along the axial direction of the sleeve. A support plate and a slider are arranged inside the strip-shaped openings. The slider is slidably arranged inside the strip-shaped openings. One end of the support plate is connected to the inner wall of the strip-shaped opening, and the other end is connected to the top of the slider. The support plate is elastic and is located at the outlet of the strip-shaped opening.

[0009] Furthermore, a plurality of cutouts are formed at both the bottom and the top of the support plate. The cutouts at the bottom of the support plate are located on one side of the slider, and the cutouts at the top of the support plate are close to the end where the support plate is connected to the sleeve.

[0010] Furthermore, the cutouts are triangular in shape, and the open ends of the cutouts are located on the outer wall of the support plate.

[0011] Furthermore, a lead screw is arranged inside the strip-shaped opening. The lead screw extends along the axial direction of the strip-shaped opening. One end of the lead screw is rotatably connected to the inner wall of the strip-shaped opening, and the other end penetrates through the sleeve and extends to the outside of the sleeve. The lead screw is rotatably connected to the inner wall of the sleeve. The slider is threadedly connected to the outer wall of the lead screw, and the top of the slider abuts against the inner top wall of the strip-shaped opening.

[0012] Furthermore, there is a gap between one side of the support plate and one side inner wall of the strip-shaped opening. A strip-shaped chute is formed in the support plate. A pull rod is slidably buckled inside the strip-shaped chute. One end of the pull rod extends to the outside of the strip-shaped opening. The area where the pull rod is located between the support plate and the strip-shaped opening abuts against the support plate and the inner wall of the strip-shaped opening.

[0013] Furthermore, a strip-shaped groove is further arranged on one side of the strip-shaped opening. The strip-shaped groove is formed on the outer wall of the sleeve. A connecting rod is installed on the outer wall of the pull rod. The end of the connecting rod extending into the strip-shaped groove is connected with a limiting bead. A plurality of steel balls are connected to the inner wall of the strip-shaped groove. The steel balls are arranged at equal intervals along the axial direction of the strip-shaped groove. The outer walls of the steel balls abut against the outer wall of the limiting bead.

[0014] Furthermore, one end of the limiting bead is narrow. The narrow end of the limiting bead gradually widens, and the outer wall of the limiting bead is smooth. There is an inclined surface between the wide end and the narrow end of the limiting bead. An annular groove is formed in the limiting bead, and a collar is sleeved inside the annular groove. The end of the connecting rod extending into the strip-shaped groove is connected to the outer wall of the collar.

[0015] Furthermore, a knob is installed at the end of the lead screw extending to the outside of the sleeve.

[0016] Furthermore, the support plate is provided with a through opening that extends along the axial direction of the support plate. A strip-shaped card slot is provided on the inner wall of the through opening. A ball is slidably clamped in the strip-shaped card slot. A support rod is connected to the outer wall of the ball. One end of the support rod away from the ball is connected to a pressing ball, and the outer wall of the pressing ball abuts against the inner wall on the other side of the through opening.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. In the present invention, when the detection head is placed in the gap to be detected, the handle will enter accordingly. The right end of the support plate is fixed in the strip-shaped opening, and the left end can move horizontally back and forth and is fixed on the slider. The slider can slide in the strip-shaped opening. When the slider moves to the right, the left end of the support plate approaches the right end and gradually bends and protrudes. It stops when it touches the inner wall of the gap. The bent support plate is stuck in the gap to fix the handle and the detection head, and the bending degree can be adjusted as needed to make the detection head stable in the gap.

[0019] 2. In the present invention, when the left end of the support plate approaches the right end and gradually bends, the area below its left end will bend inward. The material here is prone to accumulate towards the neutral axis under pressure and wrinkle. The cut can allow the material to slide or fold along it, which not only disperses the stress and makes the deformation more uniform, but also spreads the originally concentrated stress, avoiding the stress peak exceeding the yield strength of the material and causing fracture. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic external view of the present invention;

[0021] Figure 2 is a schematic overall structure view of the present invention;

[0022] Figure 3 is a schematic connection structure view of the handle and the sleeve in the present invention;

[0023] Figure 4 is a schematic connection structure view of the sleeve and the strip-shaped opening in the present invention;

[0024] Figure 5 is a schematic connection structure view of the strip-shaped opening and the support plate in the present invention;

[0025] Figure 6 is a schematic connection structure view of the lead screw and the slider in the present invention;

[0026] Figure 7 is a schematic connection structure view of the support plate and the strip-shaped chute in the present invention;

[0027] Figure 8 is a schematic connection structure view of the support plate and the through opening in the present invention

[0028] Figure 9It is a schematic diagram of the connection structure between the pull rod and the connecting rod in the present invention;

[0029] Figure 10 is Figure 4 an enlarged view of the structure at position A in

[0030] In the figure: 1. Main body of the force monitoring device;

[0031] 2. Detection head; 3. Handle; 4. Sleeve; 5. Strip-shaped opening; 6. Support plate; 7. Strip-shaped groove; 8. Lead screw; 9. Slide block; 10. Strip-shaped chute; 11. Steel ball; 12. Pull rod; 13. Limit bead; 14. Connecting rod; 15. Cut; 16. Annular groove; 17. Collar; 18. Through port; 19. Strip-shaped card slot; 20. Ball; 21. Support rod; 22. Extrusion ball. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] The present invention provides a technical solution:

[0034] Referring to Figures 1-10 as shown, a force monitoring device based on the open-cut roof structure of a top-down station includes a main body 1 of the force monitoring device, a detection head 2 is installed on the main body 1 of the force monitoring device, a handle 3 is fixedly installed on the outer wall of the detection head 2, and further includes:

[0035] A sleeve 4 is fixedly installed on the outer wall of the handle 3. A plurality of strip-shaped openings 5 are formed on the outer wall of the sleeve 4. The strip-shaped openings 5 extend along the axial direction of the sleeve 4. A support plate 6 and a slide block 9 are arranged inside the strip-shaped openings 5. The slide block 9 is slidably arranged inside the strip-shaped openings 5. One end of the support plate 6 is fixedly connected to the inner wall of the strip-shaped openings 5, and the other end is fixedly connected to the top of the slide block 9. The support plate 6 has elasticity, and the support plate 6 is located at the outlet of the strip-shaped openings 5.

[0036] After the detection head 2 is placed in the gap to be detected, the handle 3 is in the gap together with the detection head 2. Then, from Figure 4 the perspective, the right end of the support plate 6 is fixed in the strip-shaped opening 5, while the left end of the support plate 6 can freely move horizontally back and forth. The left end of the support plate 6 is fixed on the slide block 9. The slide block 9 can slide along the inside of the strip-shaped opening 5. The width of the slide block 9 is greater than the outlet of the strip-shaped opening 5. Therefore, the slide block 9 will not fall out of the strip-shaped opening 5. When the slide block 9 is at the leftmost side of the strip-shaped opening 5, at this time, the support plate 6 will be close to the outer surface of the sleeve 4;

[0037] When the slider 9 moves to the right, since the right end of the support plate 6 is fixed, as the left end of the support plate 6 moves towards the right end of the support plate 6, the support plate 6 which is elastic by itself will gradually bend and then protrude from the outer surface of the sleeve 4 until the bent support plate 6 abuts against the inner wall of the gap, then the slider 9 can stop moving, and then the bent support plate 6 will be stuck in the gap, making the handle 3 and the detection head 2 fixed;

[0038] And there are multiple support plates 6, and the different bending degrees of the multiple support plates 6 can be adjusted according to the distances between the different inner walls of the gap and the sleeve 4. The multiple support plates 6 can all abut tightly against the gap, further fixing the position of the detection head 2 to ensure the stability of the detection head 2.

[0039] Refer to Figures 4-10 , a plurality of cuts 15 are provided at both the bottom and the top of the support plate 6. The cuts 15 at the bottom of the support plate 6 are located on one side of the slider 9, and the cuts 15 at the top of the support plate 6 are close to one end where the support plate 6 is connected to the sleeve 4.

[0040] In Figure 7 it can be seen that one of the cuts 15 is at the lower left of the support plate 6, and the other cut 15 is at the upper right of the support plate 6. When the left end of the support plate 6 approaches the right end of the support plate 6, the left end of the support plate 6 will gradually bend, and the area where the left cut 15 is located will undergo internal bending. The material in this part of the internal bending will be compressed and accumulate towards the neutral axis direction, and it is easy to cause wrinkles due to excessive local stress. The existence of the cut 15 allows the material to slide or fold along the direction of the cut 15, dispersing the compressive stress and making the deformation more uniform. And the cut 15 spreads the stress originally concentrated on the inner side of the bend to a larger area, avoiding fracture caused by the stress peak exceeding the yield strength of the material;

[0041] When the right end of the support plate 6 bends, since the bending is from left to right, internal bending occurs above during the right - hand bending. Therefore, the cut 15 on the right side is above the support plate 6.

[0042] Refer to Figure 10 , the cut 15 is set in a triangular shape, and the open end of the cut 15 is located on the outer wall of the support plate 6.

[0043] When the support plate 6 bends, the inner side is subjected to compressive stress. The wide end of the triangular cut 15 is located on the outer side, that is, close to the outer wall of the support plate 6, and the narrow end points to the inner compression zone. This design can spread the concentrated compressive stress along the hypotenuse of the triangle to a larger area, avoiding the local stress peak exceeding the yield strength of the material. Compared with the rectangular cut 15, the hypotenuse of the triangular cut 15 can effectively reduce the stress concentration at the tip of the cut 15, thereby reducing the risk of crack initiation caused by stress concentration.

[0044] Refer toFigures 4-10 Inside the strip-shaped opening 5, a lead screw 8 is provided. The lead screw 8 extends along the axial direction of the strip-shaped opening 5. One end of the lead screw 8 is rotatably connected to the inner wall of the strip-shaped opening 5, and the other end penetrates through the sleeve 4 and extends to the outside of the sleeve 4. The lead screw 8 is rotatably connected to the inner wall of the sleeve 4. The slider 9 is threadedly connected to the outer wall of the lead screw 8. The top of the slider 9 abuts against the inner top wall of the strip-shaped opening 5.

[0045] From Figure 4 this perspective, when the lead screw 8 is rotated by screwing it outside the sleeve 4, when the lead screw 8 rotates, it can drive the slider 9 to slide along the outer wall of the lead screw 8. When the lead screw 8 rotates clockwise, the slider 9 will move to the right. When the lead screw 8 rotates counterclockwise, the slider 9 will move to the left, so that the moving slider 9 can drive the support plate 6 to bulge or approach the outer wall of the sleeve 4. The outlet of the strip-shaped opening 5 is narrower than the overall width of the strip-shaped opening 5, and the slider 9 is wider than the outlet of the strip-shaped opening 5. The width of the support plate 6 is within the range of the outlet width of the strip-shaped opening 5. Therefore, the support plate 6 can move within the outlet of the strip-shaped opening 5, and the slider 9 will not fall out of the outlet of the strip-shaped opening 5;

[0046] At the same time, the outer wall of the slider 9 is in close contact with the inner wall of the strip-shaped opening 5. Therefore, when the lead screw 8 rotates, the slider 9 will not rotate, but only move along the outer wall of the lead screw 8.

[0047] Refer to Figure 5 , there is a gap between one side of the support plate 6 and the inner wall of one side of the strip-shaped opening 5. The support plate 6 is provided with a strip-shaped chute 10. A pull rod 12 is slidably buckled in the strip-shaped chute 10. One end of the pull rod 12 extends to the outside of the strip-shaped opening 5. The area of the pull rod 12 located between the support plate 6 and the strip-shaped opening 5 abuts against the support plate 6 and the inner wall of the strip-shaped opening 5.

[0048] Since it is impossible to determine whether the support plate 6 bulges on the left side or the right side after the support plate 6 bulges, for irregular gaps, the pull rod 12 can be moved. As can be seen in Figure 5 , the part of the pull rod 12 extending to the outside of the sleeve 4 fits against the outer wall of the sleeve 4. When the left side of the support plate 6 is fixed, the pull rod 12 can be pushed towards the right end of the support plate 6. When the pull rod 12 moves, it will push the bulging part of the support plate 6 flat, so that the bulging part on the left side of the support plate 6 is pushed towards the right;

[0049] The bulging part of the support plate 6 can be changed to adapt to the shape of the crack, so that the support plate 6 can better fit the inner wall of the crack.

[0050] Refer to Figure 5, on one side of the strip-shaped opening 5, there is also a strip-shaped groove 7. The strip-shaped groove 7 is opened on the outer wall of the sleeve 4. A connecting rod 14 is fixedly installed on the outer wall of the pull rod 12. One end of the connecting rod 14 extending into the strip-shaped groove 7 is connected with a limiting bead 13. A plurality of steel beads 11 are fixedly connected to the inner wall of the strip-shaped groove 7. The steel beads 11 are arranged at equal intervals along the axial direction of the strip-shaped groove 7. The outer wall of the steel bead 11 abuts against the outer wall of the limiting bead 13.

[0051] When the pull rod 12 moves, it will drive the limiting bead 13 to move along the inside of the strip-shaped groove 7. The steel beads 11 in the strip-shaped groove 7 have an extrusion effect on the limiting bead 13. Although the limiting bead 13 can pass through the steel beads 11, the outer wall of the steel bead 11 is in relatively close contact with the outer wall of the limiting bead 13, which can prevent the pull rod 12 from being pushed and moved by the protruding support plate 6 after reaching the position. After the pull rod 12 moves to the appropriate position, just let go directly. The steel beads 11 can prevent the limiting bead 13 from shifting easily through the friction with the limiting bead 13.

[0052] Refer to Figure 9 , one end of the limiting bead 13 is narrower. The narrow end of the limiting bead 13 is gradually widened and the outer wall of the limiting bead 13 is smooth. There is an inclined surface between the wide end and the narrow end of the limiting bead 13. The limiting bead 13 is provided with an annular groove 16. A collar 17 is sleeved in the annular groove 16. One end of the connecting rod 14 extending into the strip-shaped groove 7 is fixedly connected to the outer wall of the collar 17.

[0053] When the narrow end of the limiting bead 13 faces right, the pull rod 12 moves in the right direction. The limiting bead 13 can easily pass through the steel beads 11 through the narrow end. When the limiting bead 13 stops moving, at this time, the wide end of the limiting bead 13 abuts against the outer wall of the steel bead 11. The wide end abuts against the outer wall of the steel bead 11, so that the limiting bead 13 will not displace in the left direction. This is because when the narrow end contacts first, the force decomposition and the smaller contact area reduce the resistance; when the wide end contacts first, the reverse component force and the increased friction force make it impossible to pass through. When the pull rod 12 needs to move to the left, just rotate the limiting bead 13 so that the narrow end of the limiting bead 13 turns to the left direction. At this time, the pull rod 12 can be pushed to move to the left. When the limiting bead 13 moves, the annular groove 16 will rotate along the inner wall of the collar 17.

[0054] Refer to Figure 4 , one end of the lead screw 8 extending outside the sleeve 4 is fixedly installed with a knob.

[0055] Holding the knob and turning it can drive the lead screw 8 to rotate. Because the outer wall of the lead screw 8 has threads, turning the lead screw 8 directly by hand is easy to scratch the palm and is not easy to operate.

[0056] Refer to Figures 7-8, a through hole 18 is formed through the support plate 6. The through hole 18 extends along the axial direction of the support plate 6. A strip-shaped card slot 19 is formed in the inner wall of the through hole 18. A ball 20 is slidably buckled in the strip-shaped card slot 19. A support rod 21 is fixedly connected to the outer wall of the ball 20. One end of the support rod 21 away from the ball 20 is fixedly connected to an extrusion ball 22. The outer wall of the extrusion ball 22 abuts against the inner wall on the other side of the through hole 18.

[0057] After the support plate 6 bulges, the left and right sides of the through hole 18 will gradually separate, and the two inner walls of the through hole 18 will also gradually move away from each other. This can make the outer wall of the support plate 6 in contact with the gap wider, increasing the contact area between the support plate 6 and the gap. At the same time, as can be seen in Figure 8 , the length of the support rod 21 is slightly longer than the distance between the two inner walls after the through hole 18 is widened. Therefore, when the expansion area of the support plate 6 reaches a certain level, the support rod 21 and the ball 20 can be slid along the strip-shaped card slot 19 to the bulged part of the support plate 6;

[0058] Then, the extrusion ball 22 is toggled to slide along the inner wall of the through hole 18 so that the extrusion ball 22 is moved to a position parallel to the ball 20. In this way, the two inner walls of the through hole 18 can be jacked up by the length of the support rod 21. The closer the extrusion ball 22 is to the position parallel to the ball 20, the wider the outer wall of the support plate 6 will be, and it will be more capable of being stuck in the gap. At the same time, the support rod 21 abuts in the through hole 18, also preventing the through hole 18 from being easily closed due to the extrusion of the gap.

Claims

1. A force monitoring device based on a top plate structure of a station opening with cover and excavation reverse construction, comprising a force monitoring device body (1), a detection head (2) being mounted on the force monitoring device body (1), and a handle (3) being mounted on the outer wall of the detection head (2), characterized in that: Also includes, The outer wall of the handle (3) is provided with a sleeve (4), and the outer wall of the sleeve (4) is provided with a plurality of strip-shaped openings (5), the strip-shaped openings (5) extending in the axial direction of the sleeve (4), and a support plate (6) and a slider (9) are provided inside the strip-shaped opening (5), and the slider (9) is slidably arranged inside the strip-shaped opening (5), one end of the support plate (6) is connected to the inner wall of the strip-shaped opening (5), and the other end is connected to the top of the slider (9), the support plate (6) is elastic, and the support plate (6) is located at the exit of the strip-shaped opening (5); There is a gap between one side of the support plate (6) and the inner wall of one side of the strip opening (5); the support plate (6) is provided with a strip slide groove (10); a pull rod (12) is slidably buckled in the strip slide groove (10); one end of the pull rod (12) extends to the outside of the strip opening (5); the area where the pull rod (12) is located between the support plate (6) and the strip opening (5) abuts against the support plate (6) and the inner wall of the strip opening (5).

2. A stress monitoring device based on the top plate structure of a cover-excavation station opening as claimed in claim 1, characterized in that: The bottom and top of the support plate (6) are both provided with a plurality of cutouts (15); the cutout (15) at the bottom of the support plate (6) is located on one side of the slider (9), and the cutout (15) at the top of the support plate (6) is close to an end where the support plate (6) is connected to the sleeve (4).

3. A stress monitoring device based on the top plate structure of a cover-excavation station opening as claimed in claim 2, characterized in that: The cutout (15) is arranged in a triangular shape, and the open end of the cutout (15) is located on the outer wall of the support plate (6).

4. A stress monitoring device based on the top plate structure of a station opening in a cover-excavation reverse construction according to claim 3, characterized in that: A screw rod (8) is arranged in the strip-shaped opening (5), and the screw rod (8) extends along the axial direction of the strip-shaped opening (5). One end of the screw rod (8) is rotatably connected to the inner wall of the strip-shaped opening (5), and the other end is inserted through the sleeve (4) and extends to the outside of the sleeve (4). The screw rod (8) is rotatably connected to the inner wall of the sleeve (4), and the slider (9) is threadedly connected to the outer wall of the screw rod (8), and the top of the slider (9) abuts against the inner top wall of the strip-shaped opening (5).

5. A stress monitoring device based on the top plate structure of a station opening in a cover-excavation reverse construction according to claim 4, characterized in that: A strip groove (7) is also provided on one side of the strip opening (5), and the strip groove (7) is opened on the outer wall of the sleeve (4). A connecting rod (14) is installed on the outer wall of the pull rod (12), and one end of the connecting rod (14) extending to the inside of the strip groove (7) is connected to a limiting bead (13). The inner wall of the strip groove (7) is connected to a plurality of steel balls (11), and the steel balls (11) are arranged at equal intervals along the axial direction of the strip groove (7), and the outer wall of the steel ball (11) abuts against the outer wall of the limiting bead (13).

6. A stress monitoring device based on the top plate structure of a cover-excavation station opening as claimed in claim 5, characterized in that: One end of the limiting bead (13) is relatively narrow, the narrow end of the limiting bead (13) is gradually widened, and the outer wall of the limiting bead (13) is smooth. The limiting bead (13) has an inclined surface between the wide end and the narrow end. The limiting bead (13) is provided with an annular groove (16), and a collar (17) is sleeved in the annular groove (16). One end of the connecting rod (14) extending to the inside of the strip groove (7) is connected to the outer wall of the collar (17).

7. A stress monitoring device based on the top plate structure of a station opening in a cover-and-cut reverse construction according to claim 6, characterized in that: A knob is installed on one end of the screw rod (8) extending to the outside of the sleeve (4).

8. The stress monitoring device based on the top plate structure of the cover-excavation reverse construction station according to claim 1 is characterized by: The support plate (6) is provided with a through opening (18) extending in the axial direction of the support plate (6); the inner wall of the through opening (18) is provided with a strip-shaped slot (19); a ball (20) is slidably buckled in the strip-shaped slot (19); the outer wall of the ball (20) is connected to a support rod (21); an end of the support rod (21) away from the ball (20) is connected to a squeezing ball (22); the outer wall of the squeezing ball (22) abuts against the inner wall of the other side of the through opening (18).

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