A super-large diameter shield machine segment rounding device

Abstract

The segment circularizing device for an extra-large diameter shield machine provided by the present invention includes: a support frame, a driving mechanism, and a moving mechanism. By rotatably connecting the upper and lower push rods of the driving mechanism to the upper and lower support frames respectively, a four-bar linkage mechanism can be formed by the upper support frame, the two driving mechanisms, and the lower support frame. Then, by setting a deflection mechanism, which includes a baffle connected to the shield tail platform and a deflection oil cylinder arranged on one side of the baffle, and connecting the cylinder body of the deflection oil cylinder to the roller frame of the sleeve in the driving mechanism, the hydraulic rod can extend and abut against the baffle, causing the sleeve to deflect relative to the lower support frame. This can not only use a support frame with a smaller span, reduce the weight, facilitate movement, and reduce the load applied to the support structure of the shield tail platform, thereby reducing the construction risk; but also change the position where the upper support frame abuts against the segment through the deflection of the sleeve relative to the lower support frame, expand the circularizing range, ensure the adjustment effect on the circularity of segment assembly, and have a good circularizing effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of shield machine equipment, and particularly relates to a segment circularizing device for an extra-large diameter shield machine. Background Art

[0002] A segment circularizing device is a device that adjusts the circularity of segment assembly by supporting the segments, and is used for the situation where the shield tail loses its circularity under complex geological conditions. Most traditional segment circularizing devices include a support frame for pressing against the segments and a driving mechanism located at both ends of the support frame for jacking up the ends of the support frame. When the diameter of the shield is small, the span of the segments is small, and the span of the support frame is correspondingly short. Such a design has no problem. However, when the diameter of the shield is extra-large, due to the large span of the segments, the span of the support frame is greatly increased, resulting in a large size and heavy weight of the entire segment circularizing device. For example, Chinese Patent CN207740008 U discloses such a segment circularizing device, whose support frame has a huge span, and the distance between the two sets of driving mechanisms occupies more than 80% of the tunnel diameter, with a heavy weight. When moving, it requires an oil cylinder with a greater thrust and supporting devices, imposing a large load on the shield tail platform support structure and having a high construction risk. If the span of the support frame is shortened, the range of pressing against the segments will be reduced, resulting in difficulty in adjusting the circularity of some positions of the segments by pressing against them with the support frame, and the circularizing effect is not good. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a segment circularizing device for an extra-large diameter shield machine with low construction risk and good circularizing effect.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is that a segment circularizing device for an extra-large diameter shield machine includes:

[0005] A support frame, which is used for pressing against the segments for circularizing, and the support frame is arranged to be movable up and down. The support frame includes an upper support frame and a lower support frame;

[0006] A driving mechanism, there are two sets of the driving mechanisms, and these two sets of driving mechanisms are respectively used to drive the two ends of the upper support frame and the lower support frame to move up and down. The driving mechanism includes a telescopic oil cylinder, a push rod for transmitting the power of the telescopic oil cylinder to the support frame, and a sleeve for passing through the push rod and guidingly cooperating with it. The telescopic oil cylinder is arranged inside the sleeve;

[0007] A moving mechanism, which is used to drive the sleeve to move along a direction parallel to the axis of the shield machine. The moving mechanism includes a translation oil cylinder, a guide rail connected to the shield tail platform, a roller frame connected to the sleeve, and rollers rotatably arranged on the roller frame and guidingly engaged with the guide rail. There are two sets of the moving mechanisms, which are arranged in one-to-one correspondence with the driving mechanisms. The roller frame in the moving mechanism is located on the side of the sleeve in the corresponding driving mechanism close to the axis of the shield machine;

[0008] The push rod includes an upper push rod and a lower push rod. The upper end of the upper push rod is rotatably connected to the end of the upper support frame. The lower end of the upper push rod is connected to the cylinder body of the telescopic oil cylinder. The upper end of the lower push rod is connected to the hydraulic rod of the telescopic oil cylinder. The lower end of the lower push rod is rotatably connected to the end of the lower support frame;

[0009] The full-round device for segments of the extra-large diameter shield machine further includes a deflection mechanism. The deflection mechanism includes a baffle connected to the shield tail platform and a deflection oil cylinder arranged on one side of the baffle. The cylinder body of the deflection oil cylinder is connected to the roller frame. The hydraulic rod of the deflection oil cylinder can protrude and press against the baffle, so that the sleeve deflects relative to the lower support frame, changing the position where the upper support frame presses against the segment and improving the full-round effect.

[0010] Preferably, the baffle extends along a direction parallel to the guide rail, and the two ends of the baffle are flush with the two ends of the guide rail.

[0011] Preferably, there are two sets of the deflection mechanisms, which are arranged in one-to-one correspondence with the moving mechanisms. The baffle in the deflection mechanism is located on the side of the guide rail in the corresponding moving mechanism close to the axis of the shield machine.

[0012] Preferably, the distance between the sleeves in the two sets of driving mechanisms is 35-40% of the tunnel diameter.

[0013] Preferably, an annular groove with a groove width larger than the width of the guide rail is formed on the roller, and the two side walls of the annular groove are located on both sides of the guide rail.

[0014] Further preferably, when the sleeve deflects to the limit position, the side wall of the annular groove presses against the side wall of the guide rail to achieve limiting.

[0015] Preferably, there are two rollers connected to the same roller frame, and the cylinder body of the deflection oil cylinder is located between the two rollers.

[0016] Preferably, an upper top plate matching the radian of the segment is provided between the upper support frame and the segment. The lower support frame includes a horizontal beam arranged at an interval from the segment, and feet connected to both ends of the horizontal beam and opening downward and outward. A lower top plate matching the radian of the segment is provided between the feet and the segment.

[0017] Preferably, an upper sliding bushing is inserted into the upper opening of the sleeve, and the upper end of the upper push rod is slidably inserted into the upper sliding bushing. A lower sliding bushing is inserted into the lower opening of the sleeve, and the lower end of the lower push rod is slidably inserted into the lower sliding bushing.

[0018] Further preferably, the lower end of the upper push rod is rotatably connected to the cylinder block of the telescopic oil cylinder, and the upper end of the lower push rod is rotatably connected to the hydraulic rod of the telescopic oil cylinder.

[0019] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0020] The segment circularizing device for a super-large diameter shield machine provided by the present invention includes: a support frame, a driving mechanism, and a moving mechanism. By rotatably connecting the upper and lower push rods of the driving mechanism to the upper and lower support frames respectively, a four-bar linkage mechanism can be formed by the upper support frame, the two driving mechanisms, and the lower support frame; further, by providing a deflection mechanism, which includes a baffle connected to the shield tail platform and a deflection oil cylinder arranged on one side of the baffle, and connecting the cylinder block of the deflection oil cylinder to the roller frame of the sleeve in the driving mechanism, the hydraulic rod can extend and abut against the baffle, causing the sleeve to deflect relative to the lower support frame. This can not only use a support frame with a smaller span, reduce the weight, facilitate movement, and reduce the load applied to the support structure of the shield tail platform, thereby reducing the construction risk; but also change the position where the upper support frame abuts against the segment through the deflection of the sleeve relative to the lower support frame, expand the circularizing range, ensure the adjustment effect on the segment assembly roundness, and have a good circularizing effect. Description of the Drawings

[0021] Figure 1 、 Figure 2 、 Figure 3 are schematic structural diagrams of the present invention. Among them, Figure 1 the sleeve in Figure 2 does not deflect, Figure 3 the sleeve in

[0022] Figure 4 deflects clockwise, Figure 1 and the sleeve in

[0023] Figure 5 deflects counterclockwise. Figure 2 is a partial enlarged schematic diagram of A in

[0024] Figure 6 is Figure 3 A partially enlarged schematic view of part C in

[0025] Figure 7 、 Figure 8 is Figure 1 A side view schematic of the driving mechanism in Figure 7 is in an unrounded state before the sleeve moves, Figure 8 is in a rounded state after the sleeve moves.

[0026] Wherein: 10. Support frame; 11. Upper support frame; 111. Upper top plate; 12. Lower support frame; 121. Horizontal beam; 122. Foot; 123. Lower top plate; 20. Driving mechanism; 21. Telescopic oil cylinder; 22. Push rod; 221. Upper push rod; 222. Lower push rod; 23. Sleeve; 231. Upper sleeve; 232. Middle sleeve; 233. Lower sleeve; 234. Upper sliding bearing sleeve; 235. Lower sliding bearing sleeve; 30. Moving mechanism; 31. Translating oil cylinder; 32. Guide rail; 33. Roller frame; 34. Roller; 341. Annular groove; 40. Deflection mechanism; 41. Baffle; 42. Deflection oil cylinder; 50. Tail shield platform. Specific embodiments

[0027] The following describes the preferred embodiments of the present invention in detail with reference to the accompanying drawings, so that the advantages and features of the present invention are more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0028] The up - down and left - right directions described in the present invention are Figure 1 the up - down and left - right directions of Figure 1 the inside - outside directions of

[0029] Such as Figures 1 to 8As shown in the figure, the large-diameter shield machine segment circularizing device provided by the present invention includes: a support frame 10, a driving mechanism 20, a moving mechanism 30, and a deflection mechanism 40. Among them, the support frame 10 is used to tightly press the segment for circularizing. The support frame 10 is arranged to be movable up and down. The support frame 10 includes an upper support frame 11 and a lower support frame 12. There are two sets of driving mechanisms 20. These two sets of driving mechanisms 20 are respectively used to drive the two ends of the upper support frame 11 and the lower support frame 12 to move up and down. The driving mechanism 20 includes a telescopic oil cylinder 21, a push rod 22 for transmitting the power of the telescopic oil cylinder 21 to the support frame 10, and a sleeve 23 for passing through the push rod 22 and guidingly cooperating with it. The sleeve 23 is composed of an upper sleeve 231, a middle sleeve 232, and a lower sleeve 233 that are connected in sequence from top to bottom and coaxially arranged. The telescopic oil cylinder 21 is arranged inside the middle sleeve 232. The moving mechanism 30 is used to drive the middle sleeve 232 to move in a direction parallel to the axis of the shield machine. The moving mechanism 30 includes a translation oil cylinder 31, a guide rail 32 connected to the shield tail platform 50, a roller frame 33 connected to the middle sleeve 232, and rollers 34 rotatably arranged on the roller frame 33 and guidingly cooperating with the guide rail 32. There are two sets of moving mechanisms 30 and they are arranged in one-to-one correspondence with the driving mechanisms 20. The roller frame 33 in the moving mechanism 30 is located on the side of the middle sleeve 232 in the corresponding driving mechanism 20 close to the axis of the shield machine. The cylinder body of the translation oil cylinder 31 is connected to the shield tail platform 50, and the hydraulic rod of the translation oil cylinder 41 is connected to the roller frame 33. The guide rail 32 extends in a direction parallel to the axis of the shield machine. Two roller frames 33 are connected to a single middle sleeve 232. These two roller frames 33 are symmetrically distributed on the upper and lower sides of the shield tail platform. One of the roller frames 33 is connected to the hydraulic rod of the translation oil cylinder 41. The push rod 22 includes an upper push rod 221 and a lower push rod 222. The upper end of the upper push rod 221 is rotatably connected to the end of the upper support frame 11, the lower end of the upper push rod 221 is connected to the cylinder body of the telescopic oil cylinder 21, the upper end of the lower push rod 222 is connected to the hydraulic rod of the telescopic oil cylinder 21, and the lower end of the lower push rod 222 is rotatably connected to the end of the lower support frame 12, so that the upper support frame 11, the two sets of driving mechanisms 20, and the lower support frame 12 form a four-bar linkage. The deflection mechanism 40 includes a baffle 41 connected to the shield tail platform 50 and a deflection oil cylinder 42 arranged on one side of the baffle 41. The cylinder body of the deflection oil cylinder 42 is connected to the roller frame 33. The hydraulic rod of the deflection oil cylinder 42 can extend and press against the baffle 41 to make the four-bar linkage act, so that the middle sleeve 232 deflects relative to the lower support frame 12, changing the position where the upper support frame 11 presses the segment, thereby expanding the circularizing range.

[0030] The advantages of such a setting are as follows: it can use a support frame with a smaller span, reduce the weight, facilitate movement, and reduce the load applied to the shield tail platform support structure, thereby reducing the construction risk; and it can also change the position where the upper support frame presses against the segment by the deflection of the sleeve relative to the lower support frame, expand the full circle range, ensure the adjustment effect on the roundness of segment assembly, and have a good full circle effect.

[0031] In this embodiment, the baffle 41 extends along a direction parallel to the guide rail 32, and the two end portions of the baffle 41 are flush with the two end portions of the guide rail 32. The advantage of such a setting is that when the translation oil cylinder 31 drives the middle sleeve 232 to move to any position, the deflection of the middle sleeve 232 relative to the lower support frame 12 can be realized.

[0032] In this embodiment, there are two sets of deflection mechanisms 40, which are arranged in one-to-one correspondence with the moving mechanism 20. The baffle in the deflection mechanism 40 is located on the side of the guide rail 32 in the corresponding moving mechanism 20 close to the axis line of the shield machine. The advantage of such a setting is that the clockwise and counterclockwise deflection of the middle sleeve 232 relative to the lower support frame 12 can be realized through the two sets of deflection mechanisms 40. When one set of deflection mechanisms 40 drives the middle sleeve 232 to deflect, the deflection position can be limited by using the deflection oil cylinder 42 in the other set of deflection mechanisms 40 to press against the baffle 41, so that the deflection mechanism 40 not only has the function of driving the middle sleeve 232 to deflect, but also has the function of controlling the rotation angle of the middle sleeve 232.

[0033] In this embodiment, the distance between the two sets of driving mechanisms 20 and the middle sleeve 23 is very important. If this distance is too large, the span of the support frame 10 is large, and it is difficult to play the role of reducing the size and weight, and the construction risk is large. If this distance is too small, the middle sleeve 232 needs to have a large deflection angle, and the safety performance is not good. Preferably, the distance between the two sets of driving mechanisms 20 and the middle sleeve 23 is 35 - 40% of the tunnel diameter. In this embodiment, this distance is 37% of the tunnel diameter.

[0034] In this embodiment, an annular groove 341 with a groove width larger than the width of the guide rail 32 is formed on the roller 34. The two side walls of the annular groove 341 are located on both sides of the guide rail 32. When the middle sleeve 232 deflects to the limit position, the side walls of the annular groove 341 press against the side walls of the guide rail 32 to realize the limit. The advantage of such a setting is that the roller 34 and the guide rail 32 can not only play the role of translation guiding, but also play the role of controlling the deflection angle of the middle sleeve 232.

[0035] In this embodiment, there are two rollers 34 connected to the same roller frame 33, and the cylinder body of the deflection oil cylinder 42 connected to the roller frame 33 is located in the middle of these two rollers 34.

[0036] In this embodiment, an upper top plate 111 matching the arc of the segment is provided between the upper support frame 11 and the segment. The lower support frame 12 includes a horizontal beam 121 spaced from the segment, and feet 122 connected to both ends of the horizontal beam 121 and opening downward and outward. A lower top plate 123 matching the arc of the segment is provided between the feet 122 and the segment. The advantage of such a setting is that it can ensure good contact with the segment through the arcs of the upper top plate 111 and the lower top plate 123, improve the circularity effect, and increase the support strength of the lower support frame 12.

[0037] In this embodiment, an upper sliding shaft sleeve 234 is inserted into the upper opening of the upper sleeve 231, and the upper end of the upper push rod 221 is slidably inserted into the upper sliding shaft sleeve 234. A lower sliding shaft sleeve 235 is inserted into the lower opening of the lower sleeve 233, and the lower end of the lower push rod 222 is slidably inserted into the lower sliding shaft sleeve 235.

[0038] In other embodiments, the lower end of the upper push rod 221 is rotatably connected to the cylinder block of the telescopic oil cylinder 21, and the upper end of the lower push rod 222 is rotatably connected to the hydraulic rod of the telescopic oil cylinder 21. The advantage of such a setting is that it can eliminate the gap generated between the upper sliding shaft sleeve 234, the lower sliding shaft sleeve 235 and the upper push rod 221, the lower push rod 222 due to wear, and ensure the stability when the telescopic oil cylinder 21 drives the upper support frame 11 to move upward and the lower support frame 12 to move downward, avoiding shaking.

[0039] It should be noted that the guide rail 32 and the baffle 41 are connected to the shield tail platform 50 through a cantilever support beam, and a proximity switch for detecting the position of the roller frame 33 is also provided on the cantilever support beam.

[0040] It should be noted that the two sets of driving mechanisms, the two sets of translation mechanisms, and the two sets of deflection mechanisms are symmetrically distributed along the longitudinal section of the shield machine.

[0041] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An integral circular device for segments of a super-large diameter shield machine, comprising: Support frame, the support frame is used to press tightly against the segment for circularizing, the support frame is arranged to be movable up and down, and the support frame includes an upper support frame and a lower support frame; Driving mechanism, there are two sets of the driving mechanisms, and these two sets of the driving mechanisms are respectively used to drive the two end parts of the upper support frame and the lower support frame to move up and down. The driving mechanism includes a telescopic oil cylinder, a push rod for transmitting the power of the telescopic oil cylinder to the support frame, and a sleeve for passing through the push rod and guidingly cooperating with it. The telescopic oil cylinder is arranged in the sleeve; Moving mechanism, the moving mechanism is used to drive the sleeve to move along the direction parallel to the axis line of the shield machine. The moving mechanism includes a translation oil cylinder, a guide rail connected to the shield tail platform, a roller frame connected to the sleeve, and rollers rotatably arranged on the roller frame and guidingly cooperating with the guide rail. There are two sets of the moving mechanisms and they are arranged in one-to-one correspondence with the driving mechanisms. The roller frame in the moving mechanism is located on the side close to the axis line of the shield machine of the sleeve in the driving mechanism corresponding to this moving mechanism; It is characterized in that: The push rod includes an upper push rod and a lower push rod. The upper end part of the upper push rod is rotatably connected to the end part of the upper support frame, the lower end part of the upper push rod is connected to the cylinder body of the telescopic oil cylinder, the upper end part of the lower push rod is connected to the hydraulic rod of the telescopic oil cylinder, and the lower end part of the lower push rod is rotatably connected to the end part of the lower support frame; The segment circularizing device of the extra-large diameter shield machine further includes a deflection mechanism. The deflection mechanism includes a baffle connected to the shield tail platform and a deflection oil cylinder arranged on one side of the baffle. The cylinder body of the deflection oil cylinder is connected to the roller frame, and the hydraulic rod of the deflection oil cylinder can protrude and press tightly against the baffle, so that the sleeve deflects relative to the lower support frame, changing the position where the upper support frame presses tightly against the segment and improving the circularizing effect.

2. The integral circular device for segments of a super-large diameter shield machine according to claim 1, characterized in that: The baffle extends along the direction parallel to the guide rail, and the two end parts of the baffle are flush with the two end parts of the guide rail.

3. The integral circular device for segments of a super-large diameter shield machine according to claim 1, characterized in that: There are two sets of the deflection mechanisms and they are arranged in one-to-one correspondence with the moving mechanisms. The baffle in the deflection mechanism is located on the side close to the axis line of the shield machine of the guide rail in the moving mechanism corresponding to this deflection mechanism.

4. The integral circular device for segments of a super-large diameter shield machine according to claim 1, characterized in that: The distance between the sleeves in the two sets of the driving mechanisms is 35-40% of the tunnel diameter.

5. The integral circular device for segments of a super-large diameter shield machine according to claim 1, characterized in that: The roller is provided with an annular groove with a groove width larger than the width of the guide rail, and the two side walls of the annular groove are located on both sides of the guide rail.

6. The integral circular device for segments of a super-large diameter shield machine according to claim 5, characterized in that: When the sleeve deflects to the limit position, the side wall of the annular groove presses tightly against the side wall of the guide rail to achieve limiting.

7. The integral circular device for segments of a super-large diameter shield machine according to claim 1, characterized in that: There are two rollers connected to the same roller frame, and the cylinder body of the deflection oil cylinder is located between the two rollers.

8. The integral circular device for segments of a super-large diameter shield machine according to claim 1, characterized in that: An upper top plate matching the radian of the segment is arranged between the upper support frame and the segment. The lower support frame includes a horizontal beam arranged at an interval from the segment, and bottom feet connected to both ends of the horizontal beam and opening downward and outward. A lower top plate matching the radian of the segment is arranged between the bottom feet and the segment.

9. The integral circular device for segments of a super-large diameter shield machine according to claim 1, characterized in that: An upper sliding bushing is inserted into the upper opening of the sleeve, and the upper end of the upper push rod is slidably inserted into the upper sliding bushing. A lower sliding bushing is inserted into the lower opening of the sleeve, and the lower end of the lower push rod is slidably inserted into the lower sliding bushing.

10. The integral circular device for segments of a super-large diameter shield machine according to claim 9, characterized in that: The lower end of the upper push rod is rotatably connected to the cylinder block of the telescopic oil cylinder, and the upper end of the lower push rod is rotatably connected to the hydraulic rod of the telescopic oil cylinder.

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