A joint and method of construction

Abstract

The application provides a joint and a construction method, which comprises a receiving joint, an active limiting piece arranged in the receiving joint, and a closing piece for limiting the activity of the limiting piece; a pin joint which is inserted into the receiving joint; a pin rod arranged on the pin joint and provided with a clamping groove in the circumference of the pin rod; and a front end of the pin rod which can extrude the closing piece to make part of the limiting piece enter the clamping groove for limiting the connection between the receiving joint and the pin joint. The front end of the pin rod extrudes the closing piece to make it shrink, so that part of the limiting piece which loses the limitation enters the clamping groove, the limiting piece is clamped between the pin rod and the receiving joint, and the receiving joint and the pin joint are locked and connected. The application has simple structure, various combination forms, can meet different engineering requirements, and can realize the effect of regulating and controlling the width of the pipe piece joint.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, and in particular to a joint and construction method. Background Technology

[0002] In China, bolted connections are commonly used for segment joints, which have problems such as large manholes and difficulty in positioning. Existing joints are being optimized towards manhole-free designs. However, manhole-free joints often face problems such as difficulty in maintenance, disassembly, and ensuring proper connection. Therefore, the forms of joints have become diverse according to requirements.

[0003] The invention patent with application number CN202210108425.9 and publication date of 2022-06-03 relates to a three-way adjustable bolt connector, including a bearing pin, a locking pin, a connector, and an adjusting part; the bearing pin and locking pin are placed on two components; the bearing pin includes a bearing pin sleeve open towards the locking pin and a support sleeve threaded to the open end of the bearing pin sleeve; the locking pin includes a locking pin sleeve open towards the bearing pin; the connector includes a connecting rod and a connector head fixed to the top of the connecting rod; the connector head is located inside the bearing pin sleeve, and the connecting rod passes downward through the support sleeve and the adjusting part, and its end is threadedly connected to the locking pin sleeve. However, this patent has a complex design, requires adjustment of the middle nut for tightening, and requires holes to be opened at the segment joint.

[0004] An invention patent with application number CN201610810876.1 and publication date of 2017-01-25 discloses a segment joint and a method for connecting segment joints. The segment joint includes a first segment with a receiving groove, the bottom of which has a sealing element, and a stop block inside the groove. The stop block has aligned connecting holes and limiting holes. A pressure plate and multiple limiting rods are also included, with the limiting rods located on the same side of the pressure plate. The pressure plate abuts against the sealing element, and the ends of the limiting rods simultaneously abut against the inner wall of the limiting holes, defining a snap-fit ​​hole. A sleeve rod is connected to a second segment, with the end of the sleeve rod passing through the connecting hole and fixed inside the snap-fit ​​hole. This method for connecting segment joints is used to securely connect segment joints. However, this patent has a complex mechanism. While it uses anchor cable technology for connection through interlocking, the mechanisms lock up after reaching a certain position, preventing further advancement and narrowing of the gaps between segment joints.

[0005] Chinese utility model patent CN 214836385 U, published on November 23, 2021, discloses a segment socket connector, including a first embedded part, a connecting rod, and a second embedded part. The outer walls of the first and second embedded parts are provided with multiple anti-reverse threads. The outer wall of the first embedded part is provided with anchor points and anti-rotation reinforcing ribs. The first embedded part is threadedly connected to one end of the connecting rod. The second embedded part is fitted onto the other end of the connecting rod and snap-fitted together. The inner wall of the second embedded part is provided with elastic clips that contract forward to form a one-way expansion latch. The end of the connecting rod is provided with several annular flanges, forming a groove between two annular flanges, which aligns with the one-way expansion latch. This patent is simple and has no handholes, but once tightened, it cannot be disassembled or repaired. If one connector in a segment fails, the other connectors cannot be retracted and reinstalled. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a joint and construction method to solve the problems of complex joints and inability to inspect and dismantle them in the prior art.

[0007] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0008] A connector, comprising:

[0009] The pin connector has an internal movable limiting element and a closing element used to restrict the movement of the limiting element.

[0010] The pin connector is used in conjunction with the pin fitting.

[0011] A pin is provided on the pin connector, and a groove is provided on the circumference of the pin; the end cap of the pin can be removed so that part of the limiting member enters the groove to limit the connection between the pin connector and the pin connector.

[0012] Furthermore, the pin connector includes a pin sleeve and a lock box detachably connected inside the pin sleeve, the lock box having a cavity for inserting the pin rod; the inner wall of the cavity has a receiving groove, the limiting member is a sliding or rolling member, the sliding or rolling member is movably disposed in the receiving groove; the closing member is disposed in the cavity and closes the sliding or rolling member in the receiving groove.

[0013] Furthermore, the slot and / or the receiving groove are inclined, and the lower side of the inclined groove is inclined downward from the inside to the outside so that a recess is formed between the slot and the receiving groove to jointly accommodate the sliding or rolling element, and the upper side of the slot locks the limiting element.

[0014] Furthermore, the lock box is threadedly connected to the pin sleeve; the pin connector also includes a pin sleeve sleeved on the pin rod, and the pin sleeve is threadedly connected to the pin rod.

[0015] Furthermore, it also includes anchors, wherein the pin sleeve and / or bearing sleeve are pre-embedded and anchored within the segment by the anchors.

[0016] Furthermore, the pin is inserted through the pin sleeve, and a hand hole is provided inside the tube corresponding to the rear end of the pin.

[0017] Furthermore, the pin includes a pin sleeve and a T-shaped single pin that passes through the pin sleeve, and the single pin is threadedly connected to the pin sleeve; the front end of the pin sleeve is provided with a bevel so that the T-shaped single pin and the front end of the pin sleeve form the groove.

[0018] Furthermore, a polygonal slider is screwed onto the outer side of the pin rod, and a polygonal groove is provided inside the pin sleeve to cooperate with the polygonal slider so that the polygonal slider can slide and deflect within the polygonal groove and then press against the pin sleeve. Limiting protrusions are provided at both ends of the polygonal groove to prevent the polygonal slider from disengaging from the polygonal groove.

[0019] Furthermore, the inner wall of the cavity is provided with multi-stage receiving grooves, and the pin is provided with multi-stage retaining grooves in the circumferential direction; or the steel balls are connected in series by elastic ropes to form a self-holding limiting component.

[0020] The construction method for the joint as described in any of the above items includes the following steps:

[0021] S1. Assemble the joint, screw the pin into the pre-embedded pin sleeve in the segment, and screw the lock box into the pre-embedded support sleeve in the segment;

[0022] S2. When connecting the pipe segments, the pin presses against the sealing component, causing the steel ball to move down to the bottom of the pit formed by the slot and the receiving groove. The force transmission gasket and sealing gasket at the joint of the pipe segments rebound, causing the pin to retract to press the steel ball, thus completing the connection.

[0023] S21. When using a split pin, after the segment is pushed into place, reverse the single pin. The single pin tightens the pin sleeve and drives the pin sleeve to rotate with the single pin, so that the split pin retracts and presses against the sliding or rolling parts.

[0024] S22. If the pin is not pushed into place after the segment is advanced, rotate the pin sleeve forward. The pin sleeve tightens the single pin and drives the single pin to rotate with the pin sleeve, so that the single pin moves forward to the top. Then reverse the single pin and the single pin presses against the sliding or rolling parts.

[0025] S3. Segment Separation: When using a split pin, secure one of the pin sleeve and the single pin and rotate the other to enlarge the groove between the single pin and the pin sleeve. Then retract the segment to allow the sliding or rolling element to move and separate the segment.

[0026] The beneficial effects of this invention are:

[0027] 1. The present invention has a simple structure and various combination forms to meet different engineering needs and achieve the effect of controlling the width of the segment joint;

[0028] 2. This invention reduces damage to the segment openings by providing micro-manholes;

[0029] 3. This invention achieves the functions of fastening and separating tube segments by setting a split pin rod and using threaded transmission, thus achieving a controllable and safe connection effect;

[0030] 4. This invention features a fault-tolerant adjustment mechanism. By limiting the relative rotation of large and small polygons, the pin can move 360° actively or passively, increasing the fault tolerance of the joint connection and accelerating the assembly efficiency.

[0031] 5. This invention, by setting a multi-stage locking box connector, meets the requirements of different segment joint widths and provides multiple connection protections, making it suitable for segment joint connections with higher safety standards and multiple distances. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the handhole-less invention;

[0034] Figure 2 for Figure 1 A sectional view;

[0035] Figure 3 This is an exploded cross-sectional view of the invention without a handhole;

[0036] Figure 4 This is a schematic diagram of the present invention before assembly without a hand hole;

[0037] Figure 5 This is a schematic diagram of the completed assembly of the handhole-less assembly of the present invention;

[0038] Figure 6 This is a schematic diagram of the assembly of the handhole-less assembly of the present invention. Figure 1 ;

[0039] Figure 7 This is a schematic diagram of the assembly of the handhole-less assembly of the present invention. Figure 2 ;

[0040] Figure 8 This is a cross-sectional view of the present invention with a hand hole;

[0041] Figure 9 A cross-sectional view of the retractable pin with a hand hole of the present invention. Figure 1 ;

[0042] Figure 10 A cross-sectional view of the retractable pin with a hand hole of the present invention. Figure 2 ;

[0043] Figure 11 A cross-sectional view of the lifting pin with a hand hole of the present invention for fastening. Figure 1 ;

[0044] Figure 12 A cross-sectional view of the lifting pin with a hand hole of the present invention for fastening. Figure 2 ;

[0045] Figure 13 This is a schematic diagram of the split pin with a hand hole according to the present invention. Figure 1 ;

[0046] Figure 14 This is a schematic diagram of the split pin with a hand hole according to the present invention. Figure 2 ;

[0047] Figure 15 A cross-sectional view of the retractable single pin fastening mechanism with a hand hole according to the present invention. Figure 1 ;

[0048] Figure 16 A cross-sectional view of the retractable single pin fastening mechanism with a hand hole according to the present invention. Figure 2 ;

[0049] Figure 17 A cross-sectional view of the lifting pin sleeve with a hand hole according to the present invention. Figure 1 ;

[0050] Figure 18 A cross-sectional view of the lifting pin sleeve with a hand hole according to the present invention. Figure 2 ;

[0051] Figure 19 A cross-sectional view of the lifting single pin with a hand hole of the present invention. Figure 1 ;

[0052] Figure 20 A cross-sectional view of the lifting single pin with a hand hole of the present invention. Figure 2 ;

[0053] Figure 21 This is a front view of the fault-tolerant adjustment mechanism of the present invention;

[0054] Figure 22 This is a cross-sectional view of the fault-tolerant adjustment mechanism of the present invention;

[0055] Figure 23This is a top view of the fault-tolerant adjustment mechanism of the present invention;

[0056] Figure 24 This is a cross-sectional view of the fault-tolerant adjustment mechanism of the present invention;

[0057] Figure 25 This is a cross-sectional view of the fault-tolerant adjustment mechanism of the present invention.

[0058] Figure 26 This is a rotated cross-sectional view of the fault-tolerant adjustment mechanism of the present invention;

[0059] Figure 27 This is a cross-sectional schematic diagram of the multi-stage lock box connector of the present invention;

[0060] Figure 28 A cross-sectional schematic diagram of the different stages of the receiving groove limiting connection of the multi-stage lock box connector of the present invention. Figure 1 ;

[0061] Figure 29 A cross-sectional schematic diagram of the different stages of the receiving groove limiting connection of the multi-stage lock box connector of the present invention. Figure 2 ;

[0062] Figure 30 A cross-sectional schematic diagram of the different stages of the receiving groove limiting connection of the multi-stage lock box connector of the present invention. Figure 3 ;

[0063] Figure 31 This is a cross-sectional schematic diagram of the spaced limiting member lock box of the present invention;

[0064] Figure 32 This is a cross-sectional schematic diagram of the self-holding limiting member lock box of the present invention;

[0065] Figure 33 This is a cross-sectional schematic diagram of the self-holding limiting member lock box of the present invention;

[0066] Figure 34 This is a cross-sectional schematic diagram of the self-clamping limiting member connection of the present invention;

[0067] Figure 35 This is a cross-sectional schematic diagram of the self-clamping limiting member connection of the present invention.

[0068] In the diagram: 1. Pin connector; 11. Pin rod; 111. Slot; 112. Pin rod hole; 113. Single pin rod; 114. Pin rod sleeve; 115. Pin rod sleeve hole; 12. Pin sleeve; 121. Slider; 122. Polygonal groove; 2. Pin-supporting connector; 21. Lock box; 211. Limiting element; 212. Receiving groove; 213. Closure element; 214. Elastic rope; 22. Pin-supporting sleeve; 3. Anchor; 10. Segment; 20. Hand hole. Detailed Implementation

[0069] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0070] like Figures 1-7 As shown, the connector described in Embodiment 1 of the present invention includes a pin connector 2 and a plug connector 1, wherein the plug connector 1 and the pin connector 2 are inserted into each other. Figure 2 As shown, the pin connector 2 has a movable limiting member 211 and a closing member 213 for restricting the movement of the limiting member 211. The closing member 213 is removable. In this embodiment, the closing member 213 is a retractable element; when the pin connector 1 is not inserted into the pin connector 2, the closing member 213 is in an extended state, which restricts the movement of the limiting member 211 and prevents the limiting member 211 from moving. The pin connector 1 has a pin 11 that can be inserted into the pin connector 2, and the pin 11 has a groove 111 around its circumference. After the pin 11 is inserted into the pin connector 2, the front end of the pin 11 can squeeze or remove the closure 213, causing the closure 213 to contract or shift. The limiting member 211, no longer restricted by the closure 213, can then move. Part of the limiting member 211 then enters the slot 111, while the other part remains inside the pin connector 2. The limiting member 211 is engaged between the pin 11 and the pin connector 2, thus locking the pin connector 2 and the pin connector 1 together. The structure is simple and enables quick connection.

[0071] Example 2 differs from Example 1 in that, as Figure 3 As shown, the pin-supporting connector 2 includes a pin-supporting sleeve 22 and a locking box 21 disposed within the pin-supporting sleeve 22. The locking box 21 has a cavity for inserting the pin rod 11. A receiving groove 212 is provided on the inner wall of the cavity. The limiting member 211 is a sliding or rolling member. Specifically, in this embodiment, the limiting member 211 is a steel ball, which is movably disposed within the receiving groove 212, meaning the steel ball can roll freely within the receiving groove 212. The receiving groove 212 can be an annular groove or multiple receiving grooves evenly spaced on the inner wall of the cavity, such as... Figure 31 As shown, each receiving groove 212 contains at least one steel ball, constraining the movement of the limiting member and preventing uneven force distribution between the limiting members. The sealing member 213 is telescopically disposed within the cavity, and can extend and retract along the depth direction of the cavity, as well as expand and contract along the radial direction of the cavity. When the sealing member 213 is extended or opened, its outer periphery abuts against the outside of the receiving groove 212, blocking the steel ball and preventing the steel ball from rolling out of the receiving groove 212.

[0072] Furthermore, such as Figure 2 and Figure 3 As shown, the longitudinal section of the receiving groove 212 is an inclined groove, and the lower side of the inclined groove is inclined downward from the inside to the outside. In this embodiment, the longitudinal section of the receiving groove 212 is triangular, that is, the cross section of the receiving groove 212 along the depth direction of the cavity is triangular, and one base of the triangle is set on the inner wall of the cavity along the axial direction of the cavity, and the base is open to form the opening of the receiving groove 212. One inclined side of the triangle slopes downward from the bottom of the groove to the opening towards the pin connector 1, so that after the pin 11 is inserted into the cavity, the steel ball can quickly roll down to the slot 111. The other inclined side of the triangle is set on the upper side of the receiving groove 212. In another embodiment, the other inclined side of the triangle is set perpendicular to the inner wall of the cavity. In other embodiments, the longitudinal section of the receiving groove 212 can be other polygons, semicircles, or arcs.

[0073] Furthermore, the longitudinal section of the slot 111 is an inclined groove, and the lower side of the inclined groove is inclined downward from the inside to the outside. In this embodiment, the longitudinal section of the slot 111 is triangular, that is, the section of the slot 111 along the cavity axis is triangular, and one base of the triangle is located on the outer periphery of the pin 11 and is open as a slot, and one hypotenuse of the triangle is inclined downward from the bottom of the slot to the slot opening, so that the slot 111 and the receiving groove 212 together form a space to receive the steel ball, and the hypotenuse of the triangular section of the slot 111 and the hypotenuse of the triangular section of the receiving groove 212 form a V-shaped recess. The other hypotenuse of the triangular section of the slot 111 is set on the upper side of the slot 111, which can hold the steel ball. Furthermore, the section of the slot 111 is a right triangle, and the right angle is upward, that is, the other hypotenuse on the upper side of the triangular section is set as the upper right angle side perpendicular to the outer periphery of the pin 11. The hypotenuse of the triangle in the receiving groove 212 causes the steel ball to roll quickly from the receiving groove 212 into the recess. Furthermore, the size of the locking groove 111 prevents the steel ball from fully entering it, allowing only partial entry. Simultaneously, the reaction force of the compressed sealing member 213, along with the rebound of the force-transmitting gasket and sealing gasket at the segment joint, causes the upper right-angled side of the right-angled triangular locking groove 111 to press the steel ball from the pin connector 2 side towards the pin connector 1 side. This upper right-angled side limits the steel ball from being pressed back into the receiving groove 212 along its hypotenuse, thus securing the steel ball within the space enclosed by the locking groove 111 and the receiving groove 212, providing a locking effect. In other embodiments, the cross-section of the locking groove 111 can be an obtuse triangle, meaning the angle between the upper hypotenuse and the outer periphery of the pin 11 is less than 90 degrees, with the inward-facing end of the upper hypotenuse tilting upwards, similarly securing the steel ball. In other embodiments, the longitudinal section of the slot 111 can be other polygonal, semi-circular, or arc-shaped. The mutual restraint of the limiting member, the slot, and the receiving groove satisfies the structural connection rigidity requirements and ensures the joint connection.

[0074] Example 3 differs from Example 2 in that, as Figure 3 and Figure 4As shown, the lock box 21 is threadedly connected to the pin sleeve 22, facilitating quick installation and maintenance of the lock box. In other embodiments, the lock box 21 and the pin sleeve 22 can be connected by bolts, riveting, pins, snap-fits, or other existing connection methods. To facilitate the threaded connection between the lock box 21 and the pin sleeve 22, the lock box 21 has a circular cross-section. Furthermore, in this embodiment, the longitudinal section of the pin sleeve 22 is an inverted U-shaped structure with an open lower side, i.e., open towards the pin connector 1; the cavity is a cylindrical cavity, the pin 11 is cylindrical, and the slot 111 is circumferentially arranged on the pin 11; the closure 213 is annular or cylindrical, and the closure 213 can be a spring or other compressible elastic element. In other embodiments, the cavity can be a polygonal cavity, and the closure 213 can have other shapes. Furthermore, when the lock box 21 and the pin sleeve 22 are bolted, riveted, pinned, or snapped together, the lock box 21 may also adopt other shapes.

[0075] Example 4 differs from Example 3 in that, as Figure 4 and Figure 5 As shown, the pin connector 1 also includes a pin sleeve 12, with the pin 11 inserted into the pin sleeve 12. The pin sleeve 12 has an internal threaded hole for inserting the pin 11. The pin sleeve 12 and the pin 11 are threadedly connected, facilitating quick installation and maintenance of the pin. The pin length can be adjusted on-site according to actual needs. Furthermore, the pin 11 has a uniform diameter, with a threaded rear section and an annular groove 111 at the front, giving the pin 11 a mushroom shape.

[0076] Example 5 differs from Example 4 in that, as Figures 4-7 As shown, the pin sleeve 12 and the bearing sleeve 22 are respectively embedded in adjacent segments 10. The openings of the internal threaded holes of the pin sleeve 12 and the openings of the bearing sleeve 22 are both exposed above the segments 10 and are arranged opposite to each other.

[0077] Example 6 differs from Example 5 in that, as Figure 5 and Figure 6 As shown, it also includes anchor 3, and the pin sleeve 12 and the bearing sleeve 22 are respectively anchored in their respective segments 10 by the anchor 3.

[0078] Example 7, the construction method of the above-mentioned joint includes the following steps:

[0079] 1. Assemble the connectors, such as Figure 4 and Figure 5 As shown, the pin 11 of the pin connector is connected to the pin sleeve 12 in the embedded pipe segment 4, and the lock box 21 of the pin connector is connected to the pin sleeve 22 in the embedded pipe segment 4.

[0080] 2. Connector connection, such as Figure 6 and Figure 7 As shown, adjust the connection hole positions of the corresponding pin joint and bearing pin joint, push the segments together until the segment joint is fitted, the end of the pin rod 11 presses against the sealing member 213, so that the sealing member 213 no longer blocks the steel ball, the steel ball moves down to the bottom of the recess formed by the slot 111 and the receiving groove 212, due to the rebound of the force transmission pad and sealing pad at the segment joint, the pin rod retracts to press the steel ball, and the pin and bearing pin joint limit connection is completed.

[0081] Example 8 differs from Example 7 in that, as Figures 8-12 As shown, the pin 11 is inserted through the pin sleeve 12, and the pin sleeve 12 has a through hole for the pin 11 to pass through. A hand hole 20 is provided inside the tube segment corresponding to the rear end of the pin 11. The pin 11 can be adjusted by inserting the hand hole 20, thereby reducing damage to the tube segment structure.

[0082] Furthermore, such as Figure 8 , Figure 9 and Figure 10 As shown, the length of the pin 11 is increased and there is a pin hole 112 at the end. A wrench is inserted into the pin hole 112 to rotate the pin 11 forward and backward, so as to tighten the steel ball.

[0083] In this embodiment, the above-described joint construction method further includes the following steps: Figure 9 and Figure 10 As shown, in the joint connection step, after the tunnel segment is pushed into place, the reverse pin 11 is reversed to retract and press against the steel ball, without requiring the tunnel segment to retract; as Figure 11 and Figure 12 As shown, in the joint connection process, after the segment is pushed into place, the pin is not pushed in to the end and the steel ball does not roll off. Rotate the pin forward to move it to the top, then reverse the pin to retract it and press the steel ball to ensure the segment connection is safe.

[0084] Example 9 differs from Example 8 in that, as Figures 13-20 As shown, pin 11 is a split structure. Figure 14 As shown, the pin 11 includes a pin sleeve 114 and a single pin 113 passing through the pin sleeve 114. The single pin 113 is T-shaped, and the upper end of the T-shape faces the pin connector 2, i.e., towards the front end. In this embodiment, the single pin 113 is threadedly connected to the pin sleeve 114. The outer side of the front end of the pin sleeve 114 has a bevel, which slopes from the inside out towards the rear end, so that after the T-shaped single pin 113 is connected to the pin sleeve 114, the horizontal part of the T-shape and the bevel form the groove 111, as shown. Figure 15 As shown.

[0085] Furthermore, such as Figure 14As shown, the rear end of the single pin 113 is provided with a pin hole 112, and a wrench is inserted into the pin hole 112 to rotate the single pin 113 forward and backward. The rear end of the pin sleeve 114 is provided with a pin sleeve hole 115, and a wrench can be used to rotate the pin sleeve forward and backward.

[0086] In this embodiment, the above-described joint construction method further includes the following steps: Figure 15 and Figure 16 As shown, in the joint connection step, after the tunnel segment is pushed into place, the single pin 113 is reversed. The single pin 113 tightens the pin sleeve 114 and drives it to rotate with the single pin 113, causing the pin 11 to retract and press the steel ball, without the need for the tunnel segment to retract. Figure 17 and Figure 18 As shown, in the joint connection process, after the tunnel segment is pushed into place, the pin 11 is not fully engaged, and the steel ball does not roll off. The pin sleeve 114 is rotated clockwise, tightening the single pin 113 and causing it to rotate with the pin sleeve 114, advancing it to the top. Then, the single pin 113 is reversed to press the steel ball, ensuring a safe tunnel segment connection. Figure 19 and Figure 20 As shown, during the separation of segment 10, the pin sleeve 114 is secured through the pin sleeve hole 115, and the single pin 113 is rotated forward. This causes the groove between the single pin 113 and the pin sleeve 114 to widen, exceeding the diameter of the steel ball. Then, the segment is retracted, and the steel ball cannot stop the pin and the pin joint, achieving the separation effect. Alternatively, during the segment separation process, the single pin 113 can be secured, and the pin sleeve 114 can be rotated backward, causing the pin sleeve to retract and separate from the single pin. The segment is then directly retracted, increasing the groove spacing, preventing the limiting component 211 from stopping through the groove, causing the limiting connection to fail, and the segment to separate. By setting a split pin and using threaded transmission, the functions of fastening and separating segments are achieved, resulting in a controllable and safe connection.

[0087] Example 10 differs from Example 9 in that, as Figures 21-26 As shown, in order to adjust the assembly hole alignment and speed up the segment assembly, a fault-tolerant adjustment mechanism is added between the pin sleeve 12 and the pin rod 11. Specifically, as... Figure 22 As shown, a polygonal slider 121 is sleeved on the outer side of the pin 11, and the pin 11 is threadedly connected to the polygonal slider 121. The insert sleeve 12 has a polygonal groove 122 that mates with the polygonal slider 121. Limiting protrusions are provided at both the upper and lower ends of the polygonal groove 122 to prevent the polygonal slider 121 from disengaging from the polygonal groove 122, and to prevent the polygonal slider 121 from sliding axially along the pin 11 within the polygonal groove 122. Meanwhile, as... Figure 24 As shown, in the radial direction of the pin 11, the polygonal slider 121 and the polygonal groove 122 are in clearance fit, so that the polygonal slider 121 can slide and rotate a certain angle within the polygonal groove 122 and then press against the pin sleeve 12, as shown. Figure 26As shown. And, as... Figure 23 As shown, the hole on the pin sleeve 12 through which the pin 11 passes is also clearance-fitted with the pin 11, allowing the polygonal slider 121 to slide 360 ​​degrees within the polygonal groove 122, as shown. Figure 25 As shown. By setting a fault-tolerant adjustment mechanism, the relative rotation limit of the large and small polygons allows the pin to move 360° actively / passively, increasing the fault tolerance of the joint connection and speeding up the assembly efficiency.

[0088] In this embodiment, as Figure 22 , Figure 24 and 25 As shown, both the polygonal slider 121 and the polygonal groove 122 are regular hexagons in their top view projection. The polygonal groove 122 is located on the wall of the hole through which the pin 11 passes on the pin sleeve 12. The opening of the polygonal groove 122 is located on the hole wall, and extends outward from the axis of the hole as a regular hexagonal groove. The polygonal slider 121 is slightly smaller than the polygonal groove 122, but larger than the hole through which the pin 11 passes on the pin sleeve 12, so that the slider is located in the groove and cannot be dislodged. Furthermore, the dimensional difference between the polygonal slider 121 and the polygonal groove 122 is within a certain range, so that after the slider rotates a certain angle, the apex of the polygonal slider 121 hits the inner wall of the groove and is limited, preventing the polygonal slider 121 from continuing to rotate relative to the polygonal groove 122. This allows the pin 11 to rotate forward or backward, thus satisfying the requirement that the slider 121 can move within the polygonal groove 122 but cannot rotate freely.

[0089] Example 11 differs from Example 9 in that, as Figures 27-30 As shown, to avoid the difficulty of docking caused by inconsistent sealing compression at the segment joints, a multi-stage locking box joint with multiple steel ball clusters is required to meet different compression ranges at the segment joints. The inner wall of the cavity is provided with multi-stage receiving grooves 212, within which a group of steel balls is movably arranged. Figure 28 As shown, during docking, the segment advancement amount is adjusted according to the different required joint widths, and the segment is matched with the corresponding stepped receiving groove for limiting connection, thus meeting engineering requirements. For example... Figure 29 As shown, when entering the next stage, the pin 11 of the plug connector 1 will push the steel ball group of this stage back into the receiving groove 212. After the lower stage forms a steel ball limiting connection, the pin 11 presses the steel ball group, the steel ball group presses the receiving groove 212, and the receiving groove 212 presses the upper stage steel ball group, as shown. Figure 30 As shown, the force is transmitted step by step without any gaps in the middle, and each step can play a limiting role, thus maximizing the ability to meet connection safety issues.

[0090] Example 12 differs from Example 2 in that, as Figures 32-35 As shown, it adopts a self-locking locking box design with a self-holding limiting component. Specifically, as... Figure 33 As shown, steel balls are strung together with elastic cord to form a self-clamping retaining element. Figure 32 As shown, the closure 213, made of rigid plastic, expands and is positioned on the opening of the receiving groove 212 to confine the steel ball within the groove. A self-locking retainer is also positioned within the groove 212, gripping the rigid plastic closure tightly to prevent it from falling out during use and ensuring the steel ball does not detach from the receiving groove 212. When connecting the connector, if... Figure 34 and Figure 35 As shown, the pin end opens the sealing part 213, and the steel ball is automatically gripped by the elastic rope to perform a limiting connection, without the need to set up a ramp to make the steel ball roll off.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A joint, characterized by include: The pin connector (2) has a movable limiting member (211) and a closing member (213) for limiting the movement of the limiting member (211). The pin connector (1) is inserted into the pin connector (2); A pin (11) is provided on the pin connector (1), and a groove (111) is provided on the circumferential direction of the pin (11); the front end of the pin (11) can remove the closure (213) so that part of the limiting member (211) enters the groove (111) to limit the connection between the pin connector (2) and the pin connector (1). The pin (11) is a split pin, which includes a pin sleeve (114) and a T-shaped single pin (113) that passes through the pin sleeve (114) and is threadedly connected to the pin sleeve (114); the front end of the pin sleeve (114) is provided with a bevel so that the upper end of the T-shaped single pin (113) and the front end of the pin sleeve (114) form the groove (111).

2. The joint of claim 1, wherein: The pin connector (2) includes a pin sleeve (22) and a lock box (21) detachably connected to the pin sleeve (22). The lock box (21) is provided with a cavity for inserting the pin rod (11). The inner wall of the cavity is provided with a receiving groove (212). The limiting member (211) is a sliding or rolling member, which is movably disposed in the receiving groove (212). The closing member (213) is disposed in the cavity and closes the sliding or rolling member in the receiving groove (212).

3. The connector according to claim 2, characterized in that: The slot (111) and / or receiving slot (212) are inclined slots, and the lower side of the inclined slot is inclined downward from the inside to the outside so that the slot (111) and the receiving slot (212) form a recess that can accommodate the sliding or rolling element together, and the upper side of the slot (111) locks the limiting element (211).

4. The connector according to claim 2 or 3, characterized in that: The lock box (21) is threadedly connected to the pin sleeve (22); the pin connector (1) also includes a pin sleeve (12) sleeved on the pin rod (11), and the pin sleeve (12) is threadedly connected to the pin rod (11).

5. The connector according to claim 4, characterized in that: It also includes anchors (3), wherein the pin sleeve (12) and / or the bearing sleeve (22) are pre-embedded and anchored in the segment (10) by the anchors (3).

6. The connector according to claim 4, characterized in that: The pin (11) is installed through the pin sleeve (12), and a hand hole (20) is provided in the tube (10) at the position corresponding to the rear end of the pin (11).

7. The connector according to claim 6, characterized in that: The outer side of the pin (11) is screwed with a polygonal slider (121), and the inner side of the pin sleeve (12) is provided with a polygonal groove (122) that is clearance-fitted with the polygonal slider (121) so that the polygonal slider (121) slides and deflects in the polygonal groove (122) and then presses against the pin sleeve (12). The two ends of the polygonal groove (122) are provided with limiting protrusions to prevent the polygonal slider (121) from disengaging from the polygonal groove (122).

8. The connector according to claim 6 or 7, characterized in that: The inner wall of the cavity is provided with multi-stage receiving grooves (212); or sliding or rolling parts are connected in series by elastic ropes to form a self-holding limiting part (211).

9. The construction method of the joint as described in any one of claims 4 to 8, characterized in that, Includes the following steps: S1. Assemble the joint, screw the pin (11) into the pre-embedded pin sleeve (12) in the tube segment (10), and screw the lock box (21) into the pre-embedded pin sleeve (22) in the tube segment (10); S2. When connecting the pipe segments, the pin (11) removes the closure (213), causing the sliding or rolling element to move down to the bottom of the pit formed by the slot (111) and the receiving groove (212). The force transmission pad and sealing pad at the joint of the pipe segment rebound, causing the pin (11) to retract to the pressing steel ball, thus completing the connection. S21. After the segment is pushed into place, reverse the single pin (113). The single pin (113) tightens the pin sleeve (114) and drives the pin sleeve (114) to rotate with the single pin (113), so that the split pin retracts and presses the sliding or rolling parts. S22. If the pin is not pushed into place after the segment is pushed into place, rotate the pin sleeve (114) in the forward direction. The pin sleeve (114) will tighten the single pin (113) and drive the single pin (113) to rotate with the pin sleeve (114) so ​​that the single pin (113) moves forward to the top. Then, reverse the single pin (113) to press the sliding or rolling parts. S3. Segment separation: Secure one of the pin sleeve (114) and the single pin (113) and rotate the other to enlarge the groove (111) between the single pin (113) and the pin sleeve (114), then retract the segment (10) to move the sliding or rolling element and separate the segment (10).

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