Auxiliary cushion block structure for stacking shield segments

Abstract

The utility model relates to the related technical field of subway shields, in particular to an auxiliary cushion block structure for stacking shield segments, which comprises the shield segments, and a mounting mechanism is arranged on the surface of a screw shaft. According to the auxiliary cushion block structure for stacking the shield segments, through the arrangement of the mounting mechanism, the cushion block is mounted and dismounted through the mounting and dismounting seam of the rubber cushion block, the cushion block is communicated with the screw shaft hole and is laterally clamped, the replacement process is simplified, nuts do not need to be dismounted, and during mounting, a positioning pin penetrates through the outer supporting plate, the inner supporting plate and a second positioning hole of the rubber cushion block to determine the mounting angle of the cushion block; when a positioning pin is inserted, a limiting pin is clamped into a limiting hole of the sealing gasket under the action of a second spring, the positioning pin is stabilized, after a nut is locked, a rubber cushion block is firmly fixed, a loading and unloading seam is not separated, a second retaining pin at the tail end of a screw shaft prevents the nut from being separated, all the structures cooperate, and the sealing performance is improved. Component loss is avoided, and the structural stability and practicability of the auxiliary cushion block are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of subway shield, especially a kind of auxiliary cushion block structure for shield segment stacking. BACKGROUND

[0002] Subway shield is an important construction technology in urban subway construction, is a kind of construction method of underground tunneling, it uses subway shield machine to excavate underground, while preventing soft foundation excavation surface collapse or maintaining excavation surface stability, tunnel excavation and lining operation are safely carried out in machine, its construction process needs to excavate vertical shaft or foundation pit in one end of a section of tunnel, hoist subway shield machine into installation, subway shield machine starts to excavate from the wall opening of vertical shaft or foundation pit and advances along design hole line until reaches another vertical shaft or end point of tunnel in hole line, shield segment is the main assembly component of shield construction, is the innermost layer barrier of tunnel, resists earth pressure, underground water pressure and some special load, shield segment is the permanent lining structure of shield tunnel, shield segment quality is directly related to the overall quality and safety of tunnel, influences the waterproof performance and durability of tunnel, segment needs to be stacked after production, and protect segment from mutual friction and contact, to facilitate subsequent transfer and transport by forklift or crane, a certain interval is needed between segments, therefore, a kind of auxiliary cushion block structure for shield segment stacking is particularly needed.

[0003] But wood spacer is generally used between segments in prior art, wood spacer is wooden structure, and it is easy to be damaged by rough surface contact under the pressure of heavy object, in addition, wood spacer is used in outdoor environment, and it is easy to swell and burst or rot after wind and sun, so it needs to be replaced after a period of time, with high use cost and large wood resource waste. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of auxiliary cushion block structure for shield segment stacking, to solve the auxiliary cushion block structure for shield segment stacking in the above background art, replace wood spacer with rubber cushion block, resist wear and tear, resist rot, with longer service life, and cushion block can be replaced individually, reduce use cost, reduce wood resource consumption, solve the problem of high use cost and large wood resource waste in prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary pad structure for stacking shield tunnel segments, comprising shield tunnel segments, characterized in that a cross hinge seat is placed on the surface of the shield tunnel segment, a shaft lug is installed on the surface of the cross hinge seat, a positioning mechanism is installed on the surface of the shaft lug, a support arm is provided on the surface of the positioning mechanism, a screw shaft is fixedly connected to the surface of the support arm, a nut is threadedly connected to the surface of the screw shaft, a second anti-reverse pin is provided at the end of the screw shaft, an outer support plate is sleeved on the surface of the screw shaft, an inner support plate is also sleeved on the surface of the screw shaft, and an installation mechanism is provided on the surface of the screw shaft;

[0006] The installation mechanism includes a rubber pad, a loading / unloading seam, a sealing washer, a second positioning hole, a positioning pin, a screw, an outer baffle, a locking screw, a telescopic hole, a second spring, a limit pin, and a limit hole. A rubber pad is fitted onto the surface of the screw shaft. A loading / unloading seam is provided on one side of the rubber pad. Sealing washers are fixedly connected to the surfaces of the outer and inner support plates. Second positioning holes are provided on the surfaces of the outer support plate, inner support plate, and rubber pad. A positioning pin passes through the interior of the second positioning hole. A screw is installed at the top of the positioning pin. An outer baffle is installed at the top of the screw. A locking screw is threaded onto the surface of the screw. A telescopic hole is provided on the inner side of the positioning pin. A second spring is installed at the inner end of the telescopic hole. A limit pin is fixedly connected to one end of the second spring. A limit hole is provided on the inner side of the sealing washer.

[0007] Preferably, the positioning mechanism includes a hinge seat, a mounting groove, a hinge ear, a first positioning hole, a first spring, a pull block, a pin, a first anti-reverse pin, and a fixing hole. The hinge seat is fixedly connected to the surface of the hinge ear. The mounting groove is provided inside the hinge seat. The hinge ear is installed inside the mounting groove. The first positioning hole is provided on the surface of the hinge seat. The first spring is fixedly connected to the outer side of the first positioning hole. The pull block is fixedly connected to the outer end of the first spring. The pin is fixedly connected to the inner end of the pull block. The first anti-reverse pin is provided at the end of the pin. The fixing hole is provided on the surface of the hinge ear.

[0008] Preferably, the hinge seat rotates freely relative to the cross hinge seat, and the installed support arm forms a folding structure through the interaction of the hinge seat and the cross hinge seat.

[0009] Preferably, the support arm is installed inside the hinge seat via a hinge lug and a mounting groove, and the outer wall dimension of the hinge lug matches the inner wall dimension of the mounting groove.

[0010] Preferably, the pull block forms a telescopic structure through the cooperation of a first spring and a pin, and the position of the first positioning hole corresponds to the position of the fixing hole.

[0011] Preferably, the four arms are arranged in the same four groups and are respectively directed to four different directions and perpendicular to each other, and two are long arms and two are short arms.

[0012] Preferably, the outer supporting plate and the inner supporting plate are arranged at the inner and outer ends of the rubber pad, and the rubber pad is positioned and supported in strength.

[0013] Preferably, the rubber pad has a size larger than the size of the outer supporting plate and the inner supporting plate, so that the shield segment can be in contact with the rubber pad.

[0014] Preferably, the second positioning hole is arranged in multiple groups on the surface of the outer supporting plate, the inner supporting plate and the rubber pad, and the outer wall size of the positioning pin is matched with the inner wall size of the second positioning hole.

[0015] Preferably, the second spring and the limiting pin are matched to form a telescopic structure, the telescopic hole is located corresponding to the limiting hole, and the outer wall size of the limiting pin is matched with the inner wall size of the telescopic hole and the limiting hole.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] 1. The auxiliary pad structure for stacking shield segments replaces the wooden pad strip with the rubber pad, has longer service life, and can be replaced individually, thereby reducing the use cost and saving the wood resources.

[0018] 2. The auxiliary pad structure for stacking shield segments is provided with four mutually perpendicular arm structures, and simultaneously supports the shield segment from four directions, and is more stable than the wooden pad strip.

[0019] 3. The auxiliary pad structure for stacking shield segments is provided with four mutually perpendicular arm structures which can be freely rotated relative to the cross hinge base, can be adjusted in angle to be suitable for different arc segments, and can be conveniently folded and stored after use. DETAILED DESCRIPTION

[0020] Figure 1 It is a schematic view of the mutual cooperation structure of the shield segment and the auxiliary pad of the utility model;

[0021] Figure 2 It is a schematic view of the appearance side structure of the utility model;

[0022] Figure 3 It is a schematic view of the positioning mechanism structure of the utility model;

[0023] Figure 4 It is a schematic view of the mutual cooperation structure of the cross hinge base and the arm of the utility model;

[0024] Figure 5The utility model discloses a support arm and screw rod axle mutual cooperation structure schematic view;

[0025] Figure 6 The utility model discloses installation mechanism structure schematic view;

[0026] Figure 7 The utility model discloses rubber pad piece structure schematic view;

[0027] Figure 8 The utility model discloses Figure 6 The utility model discloses

[0028] In the drawing: 1, shield segment; 2, cross hinge seat; 3, shaft lug; 4, positioning mechanism; 401, hinged seat; 402, installation groove; 403, hinged lug; 404, first positioning hole; 405, first spring; 406, pull block; 407, pin shaft; 408, first retreat stop pin; 409, fixed hole; 5, support arm; 6, screw rod axle; 7, nut; 8, second retreat stop pin; 9, outer supporting plate; 10, inner supporting plate; 11, installation mechanism; 1101, rubber pad piece; 1102, detachable seam; 1103, sealing washer; 1104, second positioning hole; 1105, positioning pin; 1106, screw rod; 1107, outer baffle; 1108, locking screw ring; 1109, telescopic hole; 1110, second spring; 1111, limit pin; 1112, limit hole. DETAILED DESCRIPTION

[0029] The technical scheme in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative work belong to the range of protection of the utility model.

[0030] Please refer to Figures 1-8 The utility model provides a kind of technical scheme: a kind of auxiliary pad piece structure for shield segment stacking, including shield segment 1, it is characterized in that, the surface of shield segment 1 is placed with cross hinge seat 2, the surface of cross hinge seat 2 is installed with shaft lug 3, the surface of shaft lug 3 is installed with positioning mechanism 4, the surface of positioning mechanism 4 is provided with support arm 5, the surface of support arm 5 is fixedly connected with screw rod axle 6, the surface of screw rod axle 6 is threadedly connected with nut 7, the end of screw rod axle 6 is provided with second retreat stop pin 8, the surface of screw rod axle 6 is covered with outer supporting plate 9, the surface of screw rod axle 6 is also covered with inner supporting plate 10, the surface of screw rod axle 6 is provided with installation mechanism 11;

[0031] The mounting mechanism 11 comprises a rubber pad 1101, a dismounting joint 1102, a sealing washer 1103, a second positioning hole 1104, a positioning pin 1105, a screw rod 1106, an outer baffle 1107, a locking ring 1108, an expansion hole 1109, a second spring 1110, a limiting pin 1111 and a limiting hole 1112. The surface of the screw rod shaft 6 is provided with the rubber pad 1101. The side of the rubber pad 1101 is provided with the dismounting joint 1102. The surfaces of the outer supporting plate 9 and the inner supporting plate 10 are fixedly connected with the sealing washer 1103. The surfaces of the outer supporting plate 9, the inner supporting plate 10 and the rubber pad 1101 are provided with the second positioning hole 1104. The second positioning hole 1104 is penetrated through by the positioning pin 1105. The top end of the positioning pin 1105 is provided with the screw rod 1106. The top end of the screw rod 1106 is provided with the outer baffle 1107. The surface of the screw rod 1106 is screw-connected with the locking ring 1108. The inner side of the positioning pin 1105 is provided with the expansion hole 1109. The inner end of the expansion hole 1109 is provided with the second spring 1110. One end of the second spring 1110 is fixedly connected with the limiting pin 1111. The inner side of the sealing washer 1103 is provided with the limiting hole 1112. Through the arrangement of the mounting mechanism 11, firstly, the rubber pad 1101 is mounted or dismounted through the dismounting joint 1102 arranged on one side of the rubber pad 1101. Since the dismounting joint 1102 is communicated with the central screw rod shaft hole, the operator can conveniently mount or dismount the rubber pad 1101 on or from the screw rod shaft 6 through the lateral clamping mode, which greatly simplifies the process of replacing the pad and does not need to completely dismount the nut 7 as before. During the mounting process, the second positioning hole 1104 on the surface of the outer supporting plate 9, the inner supporting plate 10 and the rubber pad 1101 plays a key role. The positioning pin 1105 is penetrated through these second positioning holes 1104 to determine the installation angle of the rubber pad 1101 and ensure that it is accurately positioned. The screw rod 1106 mounted at the top end of the positioning pin 1105 is screw-connected with the locking ring 1108 on the surface. When the locking ring 1108 is rotated, the outer supporting plate 9, the inner supporting plate 10 and the rubber pad 1101 can be gradually fixed together. At the same time, the sealing washer 1103 fixedly connected on the surface of the outer supporting plate 9 and the inner supporting plate 10 can enhance the sealing performance of the connecting part to prevent impurities such as dust and water vapor from entering and protect the internal structure. The expansion hole 1109 is arranged on the inner side of the positioning pin 1105. The second spring 1110 and the limiting pin 1111 are connected at the inner end. The limiting hole 1112 is arranged on the inner side of the sealing washer 1103. During the process that the positioning pin 1105 is inserted into the second positioning hole 1104, the limiting pin 1111 can be automatically clamped into the limiting hole 1112 under the elastic force of the second spring 1110 to further stabilize the position of the positioning pin 1105 and prevent it from being accidentally loosened or displaced during use. In this way, after the nut 7 is locked, the rubber pad 1101 is firmly fixed between the outer supporting plate 9 and the inner supporting plate 10 and will not be separated from the dismounting joint 1102. In addition, the second retreat stop pin 8 is arranged at the end of the screw rod shaft 6.The nut 7 can be effectively prevented from being separated from the screw shaft 6, each structure is closely coordinated, and the integrality is always maintained, the problem of missing structural parts is avoided, and the stability and practicality of the auxiliary pad block structure for stacking shield segments are significantly improved.

[0032] Further, the positioning mechanism 4 comprises a hinged seat 401, a mounting groove 402, a hinged lug 403, a first positioning hole 404, a first spring 405, a pull block 406, a pin shaft 407, a first retreat stop pin 408 and a fixing hole 409, the surface of the shaft lug 3 is fixedly connected with the hinged seat 401, the inside of the hinged seat 401 is provided with the mounting groove 402, the inside of the mounting groove 402 is mounted with the hinged lug 403, the surface of the hinged seat 401 is provided with the first positioning hole 404, the outside of the first positioning hole 404 is fixedly connected with the first spring 405, the outer end of the first spring 405 is fixedly connected with the pull block 406, the inner end of the pull block 406 is fixedly connected with the pin shaft 407, the tail end of the pin shaft 407 is provided with the first retreat stop pin 408, the surface of the hinged lug 403 is provided with the fixing hole 409, through the setting of the positioning mechanism 4, in the initial state, the first spring 405 is in the natural state, the tail end of the pin shaft 407 is inserted into the fixing hole 409 in the surface of the hinged lug 403 under the action of the first spring 405, at this time, the first retreat stop pin 408 on the pin shaft 407 can prevent the pin shaft 407 from accidentally coming out of the fixing hole 409, thereby ensuring the relative fixation of the hinged lug 403 and the hinged seat 401 and realizing the stable installation of the support arm 5 at the position, when it is needed to adjust or disassemble the support arm 5, the operator pulls the pull block 406 outward, the movement of the pull block 406 will drive the pin shaft 407 fixedly connected with the pull block 406 to move outward synchronously, at the same time, the first spring 405 is stretched, elastic deformation is generated and elastic potential energy is stored, along with the outward movement of the pin shaft 407, the tail end thereof gradually exits from the fixing hole 409 in the hinged lug 403, the locking of the hinged lug 403 is released, at this time, the hinged lug 403 can freely rotate or move in the mounting groove 402, thereby realizing the adjustment of the position of the support arm 5, the operator can adjust the support arm 5 to a suitable position according to actual needs, so that the fixing hole 409 on the hinged lug 403 is aligned with the first positioning hole 404 on the hinged seat 401 again, when the position adjustment is completed, the operator releases the pull block 406, due to the elastic action of the first spring 405, it will return to the natural state, drive the pull block 406 and the pin shaft 407 to move inward, the pin shaft 407 will be reinserted into the fixing hole 409 in the hinged lug 403, the hinged lug 403 and the hinged seat 401 are fixed together again, the support arm 5 is positioned at the new position, through this way, the positioning mechanism 4 can conveniently and quickly realize the installation, position adjustment and disassembly of the support arm 5, and can ensure the stability of the support arm 5 after positioning, meeting the use requirements in actual work.

[0033] Further, the hinge seat 401 is free to rotate relative to the cross hinge seat 2, and the installed support arm 5 forms a folding structure through cooperation with the cross hinge seat 2 through the hinge seat 401. Through the arrangement of the hinge seat 401, the entire auxiliary pad structure is given excellent flexibility and foldability. Since the hinge seat 401 can freely rotate relative to the cross hinge seat 2, when the shield segment stacking scene changes or the equipment needs to be stored and transported, the support arm 5 installed on the hinge seat 401 can be flexibly rotated. The support arm 5 forms a folding structure through cooperation with the hinge seat 401 and the cross hinge seat 2. The operator can easily fold the support arm 5 towards the cross hinge seat 2. This not only greatly saves space, but also facilitates storage and handling of the equipment in limited space. In addition, it can quickly adjust the stretching state of the support arm 5 according to actual needs in complex construction environment, improve the adaptability of the equipment, and ensure efficient shield segment stacking operation.

[0034] Further, the support arm 5 is installed inside the hinge seat 401 through the hinge lug 403 and the mounting slot 402, and the outer wall size of the hinge lug 403 matches the inner wall size of the mounting slot 402. Through the arrangement of the mounting slot 402 and the hinge lug 403, a stable and precise structural basis is provided for the installation and rotation of the support arm 5. The outer wall size of the hinge lug 403 matches the inner wall size of the mounting slot 402, so that the hinge lug 403 can be tightly and smoothly installed inside the mounting slot 402. When installing the support arm 5, this precise cooperation ensures the accuracy and convenience of the installation process, reduces installation errors, and provides reliable protection for the adjustment of the angle of the support arm 5. In addition, the tight cooperation also enhances the stability of the structure. When the support arm 5 bears the weight of the shield segment and other external forces, it can effectively prevent the hinge lug 403 from shaking or shifting, ensuring stable operation of the entire auxiliary pad structure and providing reliable support for the shield segment stacking.

[0035] Further, the pull block 406 and the pin shaft 407 form a telescopic structure through the cooperation of the first spring 405, the first positioning hole 404 corresponds to the position of the fixing hole 409, and the first positioning hole 404, the first spring 405, the pull block 406, the pin shaft 407 and the fixing hole 409 are arranged to conveniently and stably adjust the installation angle of the support arm 5. When the angle of the support arm 5 needs to be adjusted, the operator pulls the pull block 406, the first spring 405 is stretched, and the pin shaft 407 is pulled out of the first positioning hole 404 and the fixing hole 409. At this time, the hinge ear 403 and the support arm 5 can be freely rotated. After being rotated to the appropriate angle, the pull block 406 is loosened, the first spring 405 restores the elastic deformation, and the pin shaft 407 is inserted into the corresponding first positioning hole 404 and fixing hole 409, so as to lock the support arm 5 at the angle. The first positioning hole 404 corresponds to the position of the fixing hole 409, so that the pin shaft 407 can be accurately inserted to realize precise positioning. This design enables the operator to quickly adjust the angle of the support arm 5 according to the stacking requirements of the shield segment, and the support arm 5 is not easy to change the angle due to external force after being locked, thereby ensuring the stability and reliability of the auxiliary pad structure under different working conditions.

[0036] Further, the support arm 5 is provided with four groups of the same, and respectively faces four different directions and is perpendicular to each other, and two are long support arms 5 and two are short support arms 5. Through the arrangement of the support arm 5, the diversified support requirements in the stacking process of the shield segment 1 are met. The four groups of support arms 5 respectively face four different directions and are perpendicular to each other, and the combination design of two long support arms and two short support arms can adapt to shield segments 1 of different sizes and shapes. When large-size segments are stacked, the long support arms can provide a wider range of support to ensure that the segments are evenly stressed. For smaller size segments, the short support arms can flexibly adjust the support position to improve space utilization. The support arm layout in different directions can support the shield segment 1 from multiple directions to enhance the stability of the overall structure. Whether the shield segment 1 is placed horizontally or inclined, the support arm 5 can provide stable support for the segment through reasonable angle adjustment, effectively avoiding displacement, inclination or even collapse of the segment during stacking, and ensuring construction safety and efficiency.

[0037] Further, the outer supporting plate 9 and the inner supporting plate 10 are arranged at the inner and outer ends of the rubber pad 1101, which can position and support the rubber pad 1101. The positioning accuracy and bearing strength of the rubber pad 1101 are improved by arranging the outer supporting plate 9 and the inner supporting plate 10. The outer supporting plate 9 and the inner supporting plate 10 are arranged at the inner and outer ends of the rubber pad 1101, which can accurately define the position of the rubber pad 1101 and prevent displacement or rotation of the rubber pad 1101 on the screw shaft 6, so as to ensure that the rubber pad 1101 is always in the correct working position. After the shield segment is placed on the rubber pad 1101, the outer supporting plate 9 and the inner supporting plate 10 can uniformly disperse the pressure of the segment to the rubber pad 1101, and at the same time, the outer supporting plate 9 and the inner supporting plate 10 have a certain strength, which can provide additional support for the rubber pad 1101 and enhance the bearing capacity of the entire structure. This makes the rubber pad 1101 not easy to deform or damage when bearing the weight of the shield segment, prolongs the service life of the rubber pad 1101, and ensures the stability and reliability of the auxiliary pad structure for supporting the shield segment.

[0038] Further, the four peripheral dimensions of the rubber pad 1101 are greater than the four peripheral dimensions of the outer supporting plate 9 and the inner supporting plate 10, so that the shield segment 1 can contact the rubber pad 1101. The rubber pad 1101 can provide cushioning protection and anti-skid function for the shield segment. The four peripheral dimensions of the rubber pad 1101 are greater than the four peripheral dimensions of the outer supporting plate 9 and the inner supporting plate 10, so that the shield segment can directly contact the rubber pad 1101. The rubber material has good elasticity, which can effectively buffer the impact force between the segment and the auxiliary pad structure when the segment is placed on the pad structure, reduce the occurrence of cracks, damage and other situations of the segment due to collision, and at the same time, the surface friction of the rubber pad 1101 is large, which can increase the friction between the segment and the pad, prevent the segment from sliding due to vibration or other external forces during stacking, and improve the safety and stability of the stacking of the shield segment. In addition, the rubber pad 1101 can also adapt to a certain degree of unevenness of the segment surface, tightly fit the segment surface through elastic deformation, and further enhance the supporting effect.

[0039] Further, a plurality of second positioning holes 1104 are arranged on the surfaces of the outer supporting plate 9, the inner supporting plate 10 and the rubber pad 1101, the outer wall size of the positioning pin 1105 is consistent with the inner wall size of the second positioning hole 1104, through the arrangement of the second positioning hole 1104 and the positioning pin 1105, the accurate adjustment and stable fixation of the installation angle of the rubber pad 1101 are realized, a plurality of second positioning holes 1104 are arranged on the surfaces of the outer supporting plate 9, the inner supporting plate 10 and the rubber pad 1101, the outer wall size of the positioning pin 1105 is consistent with the inner wall size of the second positioning hole 1104, when the rubber pad 1101 is installed, the operator can insert the positioning pin 1105 into the second positioning hole 1104 at different positions according to the actual needs, so as to accurately adjust the angle of the rubber pad 1101 relative to the outer supporting plate 9 and the inner supporting plate 10, when the positioning pin 1105 is inserted, the outer supporting plate 9, the inner supporting plate 10 and the rubber pad 1101 are tightly connected together, preventing the rubber pad 1101 from rotating or moving due to stress during use, this accurate positioning and fixation mode ensures that the rubber pad 1101 can work stably under different working conditions, provides reliable support and protection for the shield segment, and improves the overall performance and applicability of the auxiliary pad structure.

[0040] Further, the second spring 1110 and the limiting pin 1111 cooperatively constitute a telescopic structure, the position of the telescopic hole 1109 corresponds to the position of the limiting hole 1112, and the outer wall size of the limiting pin 1111 is consistent with the inner wall size of the telescopic hole 1109 and the limiting hole 1112, through the arrangement of the telescopic hole 1109, the second spring 1110, the limiting pin 1111 and the limiting hole 1112, the stability of the positioning pin 1105 after installation is further enhanced, after the positioning pin 1105 is inserted into the second positioning hole 1104, the limiting pin 1111 is ejected from the telescopic hole 1109 and inserted into the limiting hole 1112 under the action of the second spring 1110, the position of the telescopic hole 1109 corresponds to the position of the limiting hole 1112, and the outer wall size of the limiting pin 1111 is consistent with the inner wall size of the two, so that the limiting pin 1111 can be tightly embedded in the limiting hole 1112, preventing the positioning pin 1105 from loosening or coming out due to vibration or other external forces during use, when it is necessary to disassemble the positioning pin 1105, a certain external force is applied to overcome the elastic force of the second spring 1110, the limiting pin 1111 is pressed back into the telescopic hole 1109, and the positioning pin 1105 can be smoothly pulled out, this design ensures firm installation of the positioning pin 1105 while also considering the convenience of disassembly, ensuring the stability of the connection between the rubber pad 1101 and the outer supporting plate 9 and the inner supporting plate 10, and providing a strong guarantee for the long-term stable operation of the auxiliary pad structure for the stacking of shield segments.

[0041] Working principle: first, when preparing to stack the shield segment, according to the size and shape of the segment, the operator first adjusts the angle and position of the supporting arm 5 through the positioning mechanism 4, pulls the pull block 406, makes the pin shaft 407 out of the fixed hole 409, loosens the pull block 406 after rotating the supporting arm 5 to the appropriate angle, and reinserts the pin shaft 407 to complete the positioning. Because the hinge seat 401 can be freely rotated relative to the cross hinge seat 2, if the space is narrow or there are special stacking requirements, the supporting arm 5 can be flexibly rotated, and even folded up to the cross hinge seat 2 direction, and then unfolded when the working environment allows. After determining the state of the supporting arm 5, start installing the rubber pad 1101, use the dismounting joint 1102 to install it on the screw shaft 6 through lateral clamping, then pass the positioning pin 1105 through the second positioning hole 1104 on the surface of the outer supporting plate 9, the inner supporting plate 10 and the rubber pad 1101, select the appropriate positioning hole according to the actual needs to determine the installation angle of the rubber pad 1101, rotate the locking ring 1108 to tightly fix the outer supporting plate 9, the inner supporting plate 10 and the rubber pad 1101, and at the same time, the sealing washer 1103 enhances the sealing performance of the connection. At this time, the limiting pin 1111 is clamped into the limiting hole 1112 under the action of the second spring 1110, further stabilizing the positioning pin 1105. Finally, tighten the nut 7, and the second stop pin 8 prevents the nut from being separated from the screw shaft 6. When the shield segment is placed on the auxiliary pad structure, the rubber pad 1101 relies on its own elastic buffer to buffer the impact force between the segment and the pad, its large surface friction prevents the segment from sliding, and it can fit the uneven surface of the segment. The outer supporting plate 9 and the inner supporting plate 10 evenly distribute the pressure of the segment to the rubber pad 1101 and provide strength support. The four supporting arms 5 support the segment from different directions, the long supporting arm is used for large-size segments, and the short supporting arm is suitable for small-size segments, which ensures that the segment is evenly stressed and prevents displacement, tilting and other situations. During the operation process, if the rubber pad 1101 needs to be replaced due to wear and tear, the nut 7 does not need to be disassembled, and it can be taken out laterally through the dismounting joint 1102. If the position of the supporting arm 5 needs to be adjusted to adapt to the new segment stacking layout, the positioning mechanism 4 can be operated again. The entire auxiliary pad structure cooperates with each component to efficiently and stably serve the shield segment stacking operation, improve the construction efficiency, and ensure the construction safety. In this way, the use process of the auxiliary pad structure for shield segment stacking is completed.

[0042] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An auxiliary pad structure for stacking shield segments, comprising a shield segment (1), characterized in that, The surface of the shield segment (1) is provided with a cross hinge base (2), the surface of the cross hinge base (2) is provided with an axle ear (3), the surface of the axle ear (3) is provided with a positioning mechanism (4), the surface of the positioning mechanism (4) is provided with a supporting arm (5), the surface of the supporting arm (5) is fixedly connected with a screw shaft (6), the surface of the screw shaft (6) is threadedly connected with a nut (7), the tail end of the screw shaft (6) is provided with a second retreat stop pin (8), the surface of the screw shaft (6) is sleeved with an outer supporting plate (9), the surface of the screw shaft (6) is also sleeved with an inner supporting plate (10), and the surface of the screw shaft (6) is provided with a mounting mechanism (11); The mounting mechanism (11) comprises a rubber pad (1101), a detachable seam (1102), a sealing washer (1103), a second positioning hole (1104), a positioning pin (1105), a screw rod (1106), an outer baffle (1107), a locking screw ring (1108), an expansion hole (1109), a second spring (1110), a limiting pin (1111) and a limiting hole (1112), the surface of the screw shaft (6) is sleeved with the rubber pad (1101), one side of the rubber pad (1101) is provided with the detachable seam (1102), the surfaces of the outer supporting plate (9) and the inner supporting plate (10) are fixedly connected with the sealing washer (1103), the surfaces of the outer supporting plate (9), the inner supporting plate (10) and the rubber pad (1101) are provided with the second positioning hole (1104), the second positioning hole (1104) is penetrated through the positioning pin (1105), the top end of the positioning pin (1105) is provided with the screw rod (1106), the top end of the screw rod (1106) is provided with the outer baffle (1107), the surface of the screw rod (1106) is threadedly connected with the locking screw ring (1108), the inner side of the positioning pin (1105) is provided with the expansion hole (1109), the inner end of the expansion hole (1109) is provided with the second spring (1110), one end of the second spring (1110) is fixedly connected with the limiting pin (1111), and the inner side of the sealing washer (1103) is provided with the limiting hole (1112).

2. The auxiliary block structure for stacking shield segments according to claim 1, characterized in that: The positioning mechanism (4) comprises a hinged seat (401), a mounting groove (402), a hinged lug (403), a first positioning hole (404), a first spring (405), a pull block (406), a pin shaft (407), a first retreat-stop pin (408) and a fixing hole (409), the surface of the shaft lug (3) is fixedly connected with the hinged seat (401), the inside of the hinged seat (401) is provided with the mounting groove (402), the inside of the mounting groove (402) is provided with the hinged lug (403), the surface of the hinged seat (401) is provided with the first positioning hole (404), the outer side of the first positioning hole (404) is fixedly connected with the first spring (405), the outer end of the first spring (405) is fixedly connected with the pull block (406), the inner end of the pull block (406) is fixedly connected with the pin shaft (407), the tail end of the pin shaft (407) is provided with the first retreat-stop pin (408), and the surface of the hinged lug (403) is provided with the fixing hole (409).

3. The auxiliary block structure for stacking shield segments according to claim 2, characterized in that: The hinged seat (401) is freely rotated relative to the cross hinged seat (2), and the installed supporting arm (5) is matched with the cross hinged seat (2) through the hinged seat (401) to form a folding structure.

4. The auxiliary block structure for stacking shield segments according to claim 2, characterized in that: The supporting arm (5) is installed in the inside of the hinged seat (401) through the hinged lug (403) and the mounting groove (402), and the outer wall size of the hinged lug (403) is consistent with the inner wall size of the mounting groove (402).

5. The auxiliary block structure for stacking shield segments according to claim 2, characterized in that: The pull block (406) is matched with the pin shaft (407) to form an extension structure through the first spring (405), and the position of the first positioning hole (404) corresponds to the position of the fixing hole (409).

6. The auxiliary block structure for stacking shield segments according to claim 1, wherein: The supporting arm (5) is provided with four groups of the same, and is respectively directed to four different directions and perpendicular to each other, and two are long supporting arms (5) and two are short supporting arms (5).

7. The auxiliary block structure for stacking shield segments according to claim 1, characterized in that: The outer supporting plate (9) and the inner supporting plate (10) are arranged at the inner and outer ends of the rubber pad (1101), and play a positioning and strength supporting role on the rubber pad (1101).

8. The auxiliary block structure for stacking shield segments according to claim 1, characterized in that: The periphery size of the rubber pad (1101) is greater than the periphery size of the outer supporting plate (9) and the inner supporting plate (10), so that the shield segment (1) can be in contact with the rubber pad (1101).

9. The auxiliary block structure for stacking shield segments according to claim 1, wherein: A plurality of groups of second positioning holes (1104) are formed in the surfaces of the outer supporting plate (9), the inner supporting plate (10) and the rubber pad (1101), and the outer wall size of the positioning pin (1105) is consistent with the inner wall size of the second positioning hole (1104).

10. The auxiliary block structure for stacking shield segments according to claim 1, wherein: The second spring (1110) and the limiting pin (1111) are matched to form an extension structure, the position of the extension hole (1109) corresponds to the position of the limiting hole (1112), and the outer wall size of the limiting pin (1111) is consistent with the inner wall size of the extension hole (1109) and the limiting hole (1112).

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