A bridging device

Abstract

The application discloses a kind of bridging devices, solve the existing pipeline bridging cannot be connected everywhere and the problem of relatively complicated connection process, the present application includes bridging pipe, adjusting part and soft sealing ring, the outer side wall of bridging pipe is provided with shaft shoulder, the soft sealing ring is sleeved on the outer side wall of bridging pipe, the adjusting part is sleeved on the outer side wall of bridging pipe and is threadedly connected with the outer side wall of bridging pipe, the soft sealing ring is located between shaft shoulder and adjusting part, when adjusting part rotates to be close to the shaft shoulder, the soft sealing ring is compressed to deformation by adjusting part and shaft shoulder to make the maximum outer diameter of soft sealing ring greater than the outer diameter of shaft shoulder.The present application has the advantages of simple structure, can improve pipeline maintenance efficiency, reduce pipeline maintenance cost and the like.

Description

Technical Field

[0001] This invention relates to the field of pipeline maintenance technology, and more specifically to a bridging device. Background Technology

[0002] During renovation, expansion, and routine maintenance at gas transmission stations, nitrogen purging is required for the vented maintenance pipeline sections. Only after the natural gas concentration in the maintenance section is below 0.5% can hot work or pipeline opening be carried out. Nitrogen injection points are typically chosen at the base of the pressure gauge or pressure transmitter, or by removing a small-diameter valve. If the former is chosen, the injection speed is slow because the base valve is a needle valve; if the latter is chosen, the different flange sizes of the removed valve make it inconvenient to connect the injection device to the injection point. The first two methods only allow for fixed-point connections; when the maintenance location is far from the valve or pressure gauge, or the two are not connected, these methods are unsuitable. Furthermore, both of these methods require the use of other external equipment for temporary fixation, making the maintenance process complex and inefficient. Summary of the Invention

[0003] The technical problem to be solved by the present invention is how to achieve bridging at any point during pipeline maintenance, and the purpose is to provide a bridging device.

[0004] This invention is achieved through the following technical solution:

[0005] like Figure 1 As shown, a bridging device includes a bridging tube, an adjusting member, and a flexible sealing ring. A shoulder is provided on the outer side wall of the bridging tube. The flexible sealing ring is sleeved on the outer side wall of the bridging tube. The adjusting member is sleeved on the outer side wall of the bridging tube and threadedly connected to the outer side wall of the bridging tube. The flexible sealing ring is located between the shoulder and the adjusting member. When the adjusting member rotates to approach the shoulder, the flexible sealing ring is compressed and deformed by the adjusting member and the shoulder so that the maximum outer diameter of the flexible sealing ring is greater than the outer diameter of the shoulder.

[0006] In use, this invention first requires drilling a hole in the side wall of the pipe to fit the shoulder. The bridging pipe passes through this hole, positioning the shoulder inside the pipe. Keeping the bridging pipe in place, the adjusting component is rotated to compress and deform the flexible sealing ring until it contacts the inner wall of the pipe. Due to the deformation of the flexible sealing ring, the shoulder is locked to the pipe. The adjusting component is then rotated until the bridging pipe and the pipe are relatively secure. This invention has a simple structure and is easy to operate. Only a hole needs to be drilled in the pipe; no external connecting devices or equipment are required, making maintenance convenient and efficient. The flexible sealing ring not only serves as a necessary component for connecting the bridging pipe to the pipe but also provides a seal, reducing the need for additional sealing components at the connection point and lowering manufacturing costs.

[0007] Preferably, it includes an auxiliary fixing device, which includes a support body and at least three support wings with their ends hinged to the support body. All support wings are evenly distributed along the circumferential direction. The support body is provided with a limiting mechanism to limit the rotation angle of the support wings relative to the support body. The support body is also provided with a first lifting ring and a second lifting ring. The first lifting ring is used to connect the recovery component, and the second lifting ring is used to connect the tightening component. The first lifting ring and the second lifting ring are located on the central axis in the circumferential direction and are respectively located on both sides of the hinge point between the support wings and the support body.

[0008] In the aforementioned bridging device, when the flexible sealing ring is compressed, the relative position of the bridging pipe needs to be fixed to prevent slippage at the connection. During pipeline maintenance, additional connecting devices are required to connect the bridging pipe and the pipeline. This ensures that the bridging pipe does not slip and does not become misaligned. However, different pipe diameters and different working environments require different connecting devices, and different pipeline treatments are also necessary, inevitably increasing maintenance costs. Furthermore, during the installation of the connecting device, care must be taken to maintain a stable connection with the bridging pipe to prevent misalignment. This is equivalent to performing a precision assembly, which inevitably leads to low maintenance efficiency. If a temporary limiting device for the bridging pipe could be provided from within the pipeline, it would undoubtedly reduce maintenance costs and improve maintenance efficiency.

[0009] In the bridging device provided by this solution, after the support wing is hinged to the support body, the support wing can rotate around the hinge. Since all the hinge points of the support wing are on the same circumference, it means that the end of the support wing opposite to the hinge point is also located on the same circumference. When all the support wing rotates synchronously around their respective hinge points, the diameter of the circumference formed by the end of the support wing opposite to the hinge point will change accordingly. When the diameter decreases, the auxiliary fixing device is allowed to be lowered into the pipe from the pipe connection hole. During the lowering process, the tightening member connects to the second lifting ring to achieve this. Once the auxiliary fixing device is fully inserted into the pipe, the support wings need to open so that the end of each support wing opposite the hinge point contacts the inner wall of the pipe, thus providing support. This is achieved through a limiting mechanism. As mentioned earlier, the limiting mechanism is used to limit the rotation angle of the support wing relative to the support body. That is, the angle of rotation of the support wing around the hinge cannot be too large. For example, when the support wing is horizontal after rotating around the hinge, the middle part of the support wing provides support, which is obviously unreasonable to those skilled in the art. Of course, when the support wings are closed together, there should be an angle between the long axis of each support wing and the axis of the circumference of all the support wings. This is so that when the auxiliary fixing device is lowered into the pipe, the support wing can open on its own according to its own weight, so that the circumference of the end of the support wing opposite the hinge point is larger than the connecting hole, ensuring that each support wing contacts the inner wall of the pipe. That is, during the lowering process, the center of gravity of the support wing is not collinear with the hinge point, and the distance between the center of gravity and the support body is greater than the distance between the hinge point and the support body. Under the limiting mechanism, the support wings open to a certain angle. At this point, by connecting the second lifting ring with the tightening component, the auxiliary fixing device can be lifted to achieve contact between the support wings and the inner wall of the pipe. Applying a certain pre-tightening force ensures sufficient support between the support wings and the inner wall of the pipe, thus completing the limiting of the pipe and the bridge pipe, preventing the bridge pipe from slipping off the pipe. When it is necessary to remove the auxiliary fixing device, simply use the first lifting ring as the bearing point. With the first lifting ring as the bearing point, the auxiliary fixing device will automatically flip over, and each support wing can retract according to its own weight. With the help of the retrieval component, the auxiliary device can be removed.

[0010] This solution achieves relative positioning between the bridging pipe and the pipeline from within the pipe, simplifying the connection work of the expansion-type bridging pipe and improving maintenance efficiency. Furthermore, the hinged design of the support wing and the support body allows the auxiliary fixing device to be adapted to connection holes of various sizes, reducing maintenance costs. Moreover, the support wing has a large adjustment range, so when lowering the auxiliary fixing device, it can be lowered from the connection hole first, or the bridging pipe can be expanded first and then lowered from the bridging pipe. This simplifies installation, reduces assembly and connection work, improves maintenance efficiency, and lowers maintenance costs. Even more significantly, after the auxiliary fixing device is lowered, the support wing automatically opens, effectively completing the automatic conversion of the device inside the pipeline, avoiding electrical control, and with a simple structure. Therefore, this invention controls device costs, resulting in high practicality and low cost.

[0011] Preferably, the limiting mechanism includes an inner limiting part and an outer limiting part, which are located on the inner and outer sides of the supporting wing, respectively. The inner limiting part has a first contact part for contacting the inner surface of the supporting wing, and the outer limiting part has a second contact part for contacting the outer surface of the supporting wing. The second contact part is circular. When the supporting wing contacts the outer or inner limiting part, the long axis of the supporting wing forms an angle with the central axis of the circumference. The inner limiting part is provided to ensure that the supporting wing does not contact each other or retracts excessively, preventing the auxiliary fixing device from failing to open under its own weight when lowered into the pipe. The outer limiting part is provided to prevent the supporting wing from opening excessively and failing to make good contact with the inner wall of the pipe, thus ensuring a good supporting effect of the supporting wing.

[0012] Optionally, an adjusting bolt is installed on the outer limiting part, and the outer side contacts the outer limiting part through the adjusting bolt. Adjusting the adjusting bolt can limit the different rotation angles of the support wings. This is because different pipes have different diameters, and their flow diameters vary. All contact points between the support wings and the inner wall of the pipe are not on the same straight line, but on a non-linear curve (of course, from the perspective of the axial direction of the pipe opening, all the aforementioned contact points are located on the same circle). Therefore, the support wings at different positions require different opening angles, and the opening angles of the support wings at the same position also differ depending on the pipe diameter. With the adjusting bolt, the support wings at each position can be adjusted to adapt to the pipe diameter, allowing the same auxiliary fixing device to use pipes of different diameters, thus saving device costs when operating on pipes of different diameters. Meanwhile, the size of the pipe opening for the adapter pipe varies on different pipes. When the opening is small, the support wing should open to a smaller extent to reduce the lever arm of the support wing and the torque of the pipe inner wall on the support wing, thus ensuring the service life of the support wing. When the opening is large, the support wing should open to a larger extent to ensure that each support wing can contact the pipe inner wall. Since the support wing opens automatically according to its own weight, adjusting bolts are set to limit the different opening angle limits of the support wing to adapt to different sizes of pipe openings.

[0013] Optionally, the inner limiting part is slidably connected to the support body. The first contact portion on the inner limiting part is circular, and the inner limiting part has translational freedom in the axial direction of the first contact portion. The inner limiting part is also connected to the support body through a tension spring to give the inner limiting part a tendency to slide in the axial direction of the first contact portion. A guide surface is provided on the inner side of the support wing, and the guide surface forms an angle with the axial direction of the first contact portion to give the support wing a tendency to open under the action of the first contact portion. The circular shape of the first contact portion ensures that the support wing can be easily stored after being folded. After the first contact portion is combined with the tension spring, the sliding tendency of the first contact portion forces the support wing to open. Due to the influence of the support wing's own weight, the support wing opens faster, thereby speeding up the installation of the auxiliary fixing device, improving maintenance efficiency, and also avoiding incomplete opening of the support wing.

[0014] Preferably, both the tightening component and the retracting component are flexible cables. After the tightening component is connected to the second lifting ring, it is then fixed to other fixing devices or structures, putting the tightening component in a stretched state. This provides tension to the auxiliary fixing device, causing the supporting side wings to interact with the inner wall of the pipe, thus providing support. At this time, the second lifting ring acts as a load-bearing point. When the tension of the tightening component is released and it is lowered (i.e., lowered to the height of the second lifting ring) until the first lifting ring becomes the main load-bearing point, the auxiliary fixing device can automatically flip over, lifting the retracting component, allowing the auxiliary fixing device to be removed from the pipe. This design is convenient to operate and maintain.

[0015] Furthermore, the second lifting ring is an openable lifting ring, with one end of the retraction component connected to the tightening component. The retraction component and the tightening component form a single unit, thereby reducing the use of longer components and minimizing interference between components in the auxiliary fixing device.

[0016] Preferably, in a specific embodiment of the second lifting ring, the second lifting ring includes a first clamping arm and a second clamping arm. The first clamping arm has a first clamping end, a first controlled end, and a first hinged end connecting the two. The first clamping arm is hinged to a support body via the first hinged end, and an elastic body is connected between the first controlled end and the support body. The second clamping arm has a second clamping end, a second controlled end, and a second hinged end connecting the two. The second clamping arm is hinged to the support body via the second hinged end, and an elastic body is connected between the second controlled end and the support body. The first clamping end and the second clamping end can contact each other to form a connecting ring. The second lifting ring is connected to a tightening member through the connecting ring. When the elastic bodies of the first controlled end and the second controlled end are compressed respectively, the first clamping end and the second clamping end can separate from each other. The elastic body ensures the stability of the connection between the second lifting ring and the tightening member, prevents the possibility of slippage between the tightening member and the second lifting ring, and also facilitates the opening operation of the second lifting ring.

[0017] Furthermore, as a specific embodiment of the connection between the second lifting ring and the support body, the support body has a mounting plane, the first arm and the second arm are respectively hinged to the mounting plane, and the first controlled end and the second controlled end are respectively connected to the mounting plane by the elastic body.

[0018] Furthermore, it includes a tooling for driving the first controlled end and the second controlled end, the tooling having at least one tubular end with a notch for avoiding the tightening member, the tooling contacting the first controlled end and the second controlled end through the end face of the tubular end.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] 1. This invention provides a bridging device with a simple structure and convenient operation. During use, only a hole needs to be drilled in the pipe; no external connecting devices or equipment are required, making maintenance convenient and efficient. The flexible sealing ring not only serves as a necessary component for connecting the bridging pipe to the pipeline but also provides a seal, reducing the need for additional sealing components at the connection point and lowering manufacturing costs. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0030] Figure 9 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0031] Figure 10 This is a structural schematic diagram of an application example provided by the present invention.

[0032] The attached diagram shows the markings and corresponding component names:

[0033] 1-Supporting side wing, 2-Limiting mechanism, 3-Second lifting ring, 4-First lifting ring, 5-Support body, 6-Sliding sleeve, 7-Adjusting connecting rod, 8-Upper shoulder, 9-Lower shoulder, 10-Adjusting bolt, 11-Inner limiting part, 12-Outer limiting part, 13-Recovery component, 14-Tightening component, 15-First controlled end, 16-Second controlled end, 17-First hinge end, 18-Second hinge end, 19-Second clamping end, 20-First clamping end, 21-Torsion spring, 22-Bridge pipe, 23-Rubber bladder, 24-Squeeze cap, 25-Adjusting component, 26-Bolt. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0035] Example

[0036] like Figure 1 As shown, a bridging device includes a bridging pipe 22, an adjusting member 25, and a flexible sealing ring. A shoulder is provided on the outer side wall of the bridging pipe 22. The flexible sealing ring is sleeved on the outer side wall of the bridging pipe 22. The adjusting member 25 is sleeved on the outer side wall of the bridging pipe 22 and threadedly connected to the outer side wall of the bridging pipe 22. The flexible sealing ring is located between the shoulder and the adjusting member 25. When the adjusting member 25 rotates to approach the shoulder, the flexible sealing ring is compressed and deformed by the adjusting member 25 and the shoulder so that the maximum outer diameter of the flexible sealing ring is greater than the outer diameter of the shoulder.

[0037] In this embodiment, the adjusting member 25 can be a nut adapted to the outer wall of the bridge pipe 22, while the flexible sealing ring is a rubber bladder 23. In particular, since the outer wall of the pipe is curved, a compression cap 24 adapted to the outer wall of the pipe can also be provided between the flexible sealing ring and the adjusting member 25, so that the flexible sealing ring can be compressed more completely and evenly, while also avoiding wear between the adjusting member 25 and the outer wall of the pipe.

[0038] Further optimization, such as Figure 2 As shown, it also includes an auxiliary fixing device, which includes a support body 5 and at least three support wings 1 with their ends hinged to the support body 5. All support wings 1 are evenly distributed along the circumferential direction. A limit mechanism 2 is provided on the support body 5 to limit the rotation angle of the support wings 1 relative to the support body 5. The support body 5 is also provided with a first lifting ring 4 and a second lifting ring 3. The first lifting ring 4 is used to connect the recovery component 13, and the second lifting ring 3 is used to connect the tightening component 14. The first lifting ring 4 and the second lifting ring 3 are located on the central axis of the circumferential direction and are respectively located on both sides of the hinge point between the support wings 1 and the support body 5.

[0039] Specifically, in one possible embodiment, the base of the support body 5 is a disc, and two protruding pillars extend outward from the center of the disc on both sides of the support body 5. One of these protruding pillars has a first lifting ring 4, and the other has a second lifting ring 3. Since these two lifting rings are used to connect the tightening member 14 and the retrieving member 13, their specific structure can be appropriately adjusted according to the actual structure of the tightening member 14 and the retrieving member 13. In this embodiment, they are set as circular rings for ease of manufacturing. In other possible embodiments, the first lifting ring 4 and the second lifting ring 3 may be square, or they may be snap-fit ​​shaped, or they may be bolt-locking structures, etc. Any structure used to connect the support body 5 and the tightening member 14, or the support body 5 and the retrieving member 13, should be considered equivalent to the first lifting ring 4 and the second lifting ring 3 in this embodiment. Four limiting mechanisms 2 are arranged around a protruding post on one of the disks of the support body 5. Each limiting mechanism 2 is a hollow column, and a hinge shaft is installed within its cavity. The axis of the hinge shaft is perpendicular to the axis of the protruding post. The inner wall of the cavity of the limiting mechanism 2 has two limiting surfaces arranged radially along the support body 5. The limiting surface closer to the protruding post is inclined away from the disk of the support body 5 towards the direction away from the protruding post, while the limiting surface away from the protruding post is curved, convex towards the direction away from the protruding post. In the limiting mechanism 2 provided in this embodiment, when the support wing 1 is hinged to the hinge shaft, the plane of motion of the support wing 1 is perpendicular to the axial direction of the hinge shaft. At this time, the two limiting surfaces restrict the rotation angle of the support wing 1. The limiting surface closer to the protruding post restricts the degree of retraction of the support wing 1. This limiting surface is an inclined plane relative to the disk surface of the support body 5, the purpose of which is to ensure that the long axis of the support wing 1 is not perpendicular to the disk surface of the support body 5. Figure 3 As shown, after the supporting wing 1 is fully retracted, from the normal view of the disk surface of the support body 5, the center of gravity of the supporting wing 1 is offset from the hinge point. This offset ensures that the supporting wing 1 can open on its own in a free state. That is, the torque generated by its own gravity causes the supporting wing 1 to rotate around the hinge point, while the limiting surface away from the protrusion restricts the degree of opening of the supporting wing 1. Of course, in this embodiment, one limiting surface is an inclined surface and the other is a curved surface, which is just a conventional means. In other possible embodiments, the limiting mechanism 2 can also be an independent limiting body set on the inner and outer sides of the supporting wing 1, or two limiting protrusions can be set on the axial direction of the hinge axis, or the cooperation between the connecting rod and the sliding sleeve 6 can connect multiple supporting wings 1 to the same sliding sleeve 6 for easy adjustment. In short, as long as the limiting mechanism 2 is set to limit the rotation angle of the supporting wing 1, it should be equivalent to the limiting mechanism 2 in this embodiment.

[0040] During operation: Connect the first lifting ring 4 and the second lifting ring 3 to the recovery component 13 and the tightening component 14 respectively. Secure the tightening component 14 manually or using other mechanisms to allow the auxiliary fixing device to hang freely. Due to the even distribution of the supporting wings 1 and the limiting mechanism 2, the auxiliary fixing device can be positioned vertically in the air with the convex axis in the vertical direction. Lower the auxiliary fixing device below the pipe connection hole or bridge pipe 22 opening. The supporting wings 1, limited by the pipe connection hole or bridge pipe 22 opening, will automatically retract, allowing the supporting wings 1 to pass through the opening of the pipe connection hole or bridge pipe 22. Continue lowering the auxiliary fixing device into the pipe. At this point, the supporting wings 1 are no longer restricted by the opening of the connection hole or bridge pipe 22 and can freely open. Raise the tightening component 14 so that the supporting wings 1 contact the inner wall of the pipe and apply a certain pulling force to tighten the component 14. When tensioned, the supporting wing 1 interacts with the inner wall of the pipe. When the bridge pipe 22 is assembled before the auxiliary fixing device, the tightening member 14 is fixed and the bridge pipe 22 is adjusted to ensure the sealing of the expansion joint. At this time, the retractable member 13 can remain in a free state and its free end can be detachably connected to the bridge pipe 22 for convenient subsequent operations. Then, the bridge pipe 22 is connected for operation. When the bridge pipe 22 is assembled after the auxiliary fixing device, the free ends of the tightening member 14 and the retractable member 13 are passed through the bridge pipe 22, and the bridge pipe 22 is expanded. The tightening member 14 is fixed and the bridge pipe 22 is adjusted to ensure the sealing of the expansion joint. At this time, the retractable member 13 can remain in a free state and its free end can be detachably connected to the bridge pipe 22 for convenient subsequent operations. Then, the bridge pipe 22 is connected for operation. At this time, the auxiliary fixing device ensures that the bridge pipe 22 and the pipe connection hole will not slip, ensuring the stability of the expansion joint. After the operation is completed, the tightening component 14 is disassembled to keep it in a free state and the auxiliary fixing device is lowered. At this time, due to the action of gravity and the pulling force of the recovery component 13, the auxiliary fixing device flips over by itself, and the supporting side wing 1 retracts by itself under the action of gravity. The auxiliary fixing device can be taken out from the pipe by lifting the recovery component 13.

[0041] In the above embodiments, as a specific implementation method where the linkage and the sliding sleeve 6 cooperate to connect multiple support wings 1 to the same sliding sleeve 6 for convenient adjustment, such as... Figure 4 As shown, the support body 5 has a cylindrical protrusion in the middle, and a sliding sleeve 6 is fitted onto the cylindrical protrusion. The sliding sleeve 6 can slide relative to the cylindrical protrusion. An upper shoulder 8 and a lower shoulder 9 are respectively provided on the cylindrical protrusion on both sides of the sliding sleeve 6. The sliding sleeve 6 is hinged to the support side wing 1 through an adjusting connecting rod 7. The upper shoulder 8 serves as the closing limit of the support side wing 1, and the lower shoulder 9 serves as the opening limit of the support side wing 1. The lower shoulder 9 can also be configured to be threadedly connected to the cylindrical protrusion, thereby making the opening limit adjustable.

[0042] In one possible embodiment, such as Figure 5As shown, the support body 5 is a rotating body with an I-shaped cross-section that is shorter at the top and longer at the bottom. Specifically, the support body 5 consists of a larger disc, a smaller disc, and a connecting shaft between the two discs. The two discs face each other. The first lifting ring 4 is installed in the middle of the smaller disc, and the second lifting ring 3 is installed in the middle of the larger disc. The edge of the larger disc extends diagonally upwards to form an outer limiting part 12. A perforated disc is fitted onto the connecting shaft, serving as an inner limiting part. Part 11, the supporting wing 1 is located between the inner limiting part 11 and the outer limiting part 12. The supporting wing 1 is hinged to the surface of the larger disk at one end. From the normal view of the disk surface, the hinge point of the supporting wing 1 is located inside the smaller disk. When all the supporting wing 1 are retracted, they are in contact with the inner limiting part 11. Due to the position of the hinge point, the long axis of the supporting wing 1 forms an angle with the surface of the larger disk. In the free state, the supporting wing 1 tends to automatically open outward due to gravity. This embodiment further simplifies the structure. The limiting mechanism 2 essentially realizes the above-mentioned one-to-many limiting form for the supporting wing 1, thereby reducing the processing cost and manufacturing difficulty of the limiting mechanism 2, and reducing manufacturing costs.

[0043] Preferably, an adjusting bolt 10 is provided on the outer limiting part 12. The stud head of the adjusting bolt 10 is located on the side of the outer limiting part 12 facing away from the supporting side wing 1, and the other end of the adjusting bolt 10 is located on the side of the outer limiting part 12 close to the supporting side wing 1. By rotating the adjusting bolt 10, the length of the bolt 26 between the supporting side wing 1 and the outer limiting part 12 can be adjusted, so that the adjusting bolt 10 can achieve different limiting effects on the supporting side wing 1. When the bolt 26 between the supporting side wing 1 and the outer limiting part 12 is longer, the angle at which the supporting side wing 1 opens outward is smaller, that is, the degree of opening of the supporting side wing 1 is reduced. When the bolt 26 between the supporting side wing 1 and the outer limiting part 12 is shorter, the angle at which the supporting side wing 1 opens outward is larger, that is, the degree of opening of the supporting side wing 1 is increased. Of course, in this embodiment, each adjusting bolt 10 corresponds to a supporting wing 1, and each supporting wing 1 can be adjusted individually, meaning that the opening angle of each supporting wing 1 can be different. This ensures that all supporting wing 1 are in full contact with the inner wall of the curved pipe, improving support stability. Figure 9 In the diagram, dashed lines L1 and L2 represent the movement trajectory of one end of the right support wing 1 and the outline of the pipe cross-section, respectively. When the right support wing 1 rotates to the angle indicated by the dashed line, under the condition that the middle support wing 1 is in contact with the inner wall of the pipe, the right support wing 1 is also able to contact the inner wall of the pipe, preventing the right support wing 1 from being out of contact and ensuring the stability of the contact between the support wing 1 and the inner wall of the pipe.

[0044] Further optimization, such as Figure 5As shown, a tension spring connects the smaller disk and the larger disk on the support body 5. The tension spring is sleeved with the connecting shaft. A guide surface is also provided on the segment near the hinge point on the support side wing 1. The guide surface is a masonry surface. Under the tension of the tension spring, the smaller disk slides towards the larger disk. Since the guide surface is in contact with the smaller disk, the smaller disk forces the support side wing 1 to open, thereby improving the opening efficiency of the support side wing 1.

[0045] Further optimization, such as Figure 6 As shown, the auxiliary fixing device also includes a tightening member 14 and a retraction member 13. Both the tightening member 14 and the retraction member 13 are flexible cables. The tightening member 14 is connected to the second lifting ring 3, and the retraction member 13 is connected to the first lifting ring 4. The tightening member 14 is responsible for the interaction force between the auxiliary device and the inner wall of the pipe during lowering: during lowering, the tightening member 14 provides tension, allowing the supporting wing 1 to maintain balance. After the supporting wing 1 opens inside the pipe, lifting the tightening member 14 allows the supporting wing 1 to contact the inner wall of the pipe, thus putting the tightening member 14 in a tensioned state, and the supporting wing 1 and the inner wall of the pipe then generate an interaction force. The retraction member 13 plays a role in the removal of the auxiliary fixing device: the tightening member 14 continuously lowers the auxiliary fixing device until the first lifting ring 4 becomes the load-bearing point of the auxiliary fixing device, meaning that the auxiliary fixing device flips itself due to the change in load-bearing point. Then, by lifting the retraction member 13, the auxiliary fixing device can be removed from the pipe.

[0046] Further optimization, such as Figure 6 , Figure 7As shown, the second lifting ring 3 is configured as an openable lifting ring. Specifically, the second lifting ring 3 includes a first arm and a second arm. The first arm consists of a first controlled end 15, a first hinged end 17, and a first clamping end 20. The first hinged end 17 is located between the first clamping end 20 and the first controlled end 15 and is hinged to the support body 5. A torsion spring 21 is also connected between the first controlled end 15 and the support body 5. One end of the torsion spring 21 is fixed to the first controlled end 15. The first and second arms are fixedly connected, with the other end of the torsion spring 21 fixedly connected to the support body 5. The second arm consists of a second controlled end 16, a second hinged end 18, and a second clamping end 19. The second hinged end 18 is located between the second clamping end 19 and the second controlled end 16 and is hinged to the support body 5. A torsion spring 21 is also connected between the second controlled end 16 and the support body 5. One end of the torsion spring 21 is fixedly connected to the second controlled end 16, and the other end of the torsion spring 21 is fixedly connected to the support body 5. When the first and second arms are in a free state, the first clamping end 20 and the second clamping end 19 are in contact with each other. When the first controlled end 15 and the second controlled end 16 are pressed to deform the corresponding torsion springs 21, the first clamping end 20 and the second clamping end 19 separate from each other. When the auxiliary fixing device needs to be flipped, press the first controlled end 15 and / or the second controlled end 16 to separate the second lifting ring 3 from the tightening member 14. At this time, the load-bearing point of the auxiliary fixing device is located on the first lifting ring 4, and the auxiliary fixing device flips itself under its own weight. Based on the second lifting ring 3 being an openable lifting ring, the end of the recovery member 13 opposite to the first lifting ring 4 is connected to the tightening member 14. When the auxiliary fixing device needs to be flipped, the second lifting ring 3 can be separated from the tightening member 14, without the need to operate the tightening member 14 and the recovery member 13 separately, which facilitates operation and improves maintenance efficiency.

[0047] Further optimization, such as Figure 6 As shown, the support body 5 has a mounting plane, and the second lifting ring 3 is connected to the support body 5 through the first mounting plane. Setting up a mounting plane not only facilitates the installation of the second lifting ring 3, reduces manufacturing difficulty and costs, but more importantly, ensures that the operating directions of the first controlled end 15 and the second controlled end 16 are aligned, thus facilitating the opening of the second lifting ring 3. Furthermore, when using tooling to open the second lifting ring 3, it also facilitates the simple fabrication of the tooling.

[0048] In one possible embodiment, such as Figure 8As shown, this embodiment provides a tooling for pressing the controlled end of the second lifting ring 3. The tooling is a tubular body with a notch on the side wall. The notch is used to avoid the tightening member 14. The tooling contacts the first controlled end 15 and the second controlled end 16 of the second lifting ring 3 through its end face. By pressing the tooling, the first controlled end 15 and the second controlled end 16 are subjected to force, thereby opening the first clamping end 20 and the second clamping end 19, realizing the separation of the second lifting ring 3 from the tightening member 14. Of course, the tooling can also be pre-fitted with the tightening member 14. When fitted with the tightening member 14, the tooling is set as a tubular body. Two notches are provided at one end of the tubular body to avoid the first controlled end 15 and the second controlled end 16. When it is necessary to separate the second lifting ring 3 from the tightening member 14, the tooling is lifted and rotated so that the two notches are not aligned with the first controlled end 15 and the second controlled end 16. At this time, the tooling is pressed so that the end face of the tooling acts on the first controlled end 15 and the second controlled end 16 to open the second lifting ring 3.

[0049] like Figure 10 As shown in the figure, this illustration illustrates an application example of the auxiliary fixing device. One end of the bridge pipe 22 is provided with a skirt to prevent the rubber bladder 23 on the bridge pipe 22 from slipping into the pipe. A compression cap 24 and an adjusting member are sequentially fitted onto the bridge pipe 22 from bottom to top, threadedly connected to the bridge pipe 22. Rotating the adjusting member forces the compression cap 24 to compress the rubber bladder 23, thereby sealing the connection hole of the pipe. A bolt 26 is threaded through the bridge pipe 22, and the tightening member 14 of the auxiliary fixing device is fixedly connected to the bolt 26. By rotating the bolt 26, the tightening member 14 is tensioned, providing sufficient support between the auxiliary fixing device and the inner wall of the pipe. A relative tensile force exists between the auxiliary fixing device and the bridge pipe 22, thus preventing slippage between the bridge pipe 22 and the pipe. Of course, the bolt 26 in this example is for the tightening member 14 to be a flexible cable. When the tightening member 14 is a rigid structure, an adjusting nut can be set in the bridge pipe 22. The adjusting nut is threadedly connected to the tightening member 14. By rotating the adjusting nut, the tightening member 14 and the adjusting nut are relatively displaced, so that the tightening member 14 is in a tensioned state.

[0050] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A bridging device, characterized in that The bridge pipe, the adjusting member and the soft sealing ring are included; The shaft shoulder is arranged on the outer side wall of the bridge pipe; The soft sealing ring is sleeved on the outer side wall of the bridge pipe; The adjusting member is sleeved on the outer side wall of the bridge pipe and is threadedly connected with the outer side wall of the bridge pipe, and the soft sealing ring is located between the shaft shoulder and the adjusting member; When the adjusting member rotates to approach the shaft shoulder, the soft sealing ring is compressed and deformed by the adjusting member and the shaft shoulder, so that the maximum outer diameter of the soft sealing ring is greater than the outer diameter of the shaft shoulder; The auxiliary fixing device is further included, the auxiliary fixing device includes a support body and at least three support flaps hingedly connected to the support body, all the support flaps are uniformly distributed in the circumferential direction, and the support flaps are provided with support portions for contacting the inner wall of the pipeline at the ends opposite to the hinged ends. The support body is provided with a limiting mechanism to limit the rotation angle of the support flaps relative to the support body, and the support body is further provided with a first lifting ring and a second lifting ring, the first lifting ring is used for connecting a recovery member, the second lifting ring is used for connecting a tightening member, the second lifting ring is a claspable lifting ring, one end of the recovery member is connected with the tightening member, the first lifting ring and the second lifting ring are located on the central axis in the circumferential direction and are respectively located on the two sides of the hinged points of the support flaps and the support body, wherein the recovery member and the tightening member are flexible cable bodies; The second lifting ring includes a first clamping arm and a second clamping arm; The first clamping arm has a first clamping end, a first controlled end and a first hinged end connected between the two, the first clamping arm is hingedly connected to the support body through the first hinged end, and an elastic body is connected between the first controlled end and the support body; The second clamping arm has a second clamping end, a second controlled end and a second hinged end connected between the two, the second clamping arm is hingedly connected to the support body through the second hinged end, and an elastic body is connected between the second controlled end and the support body; The first clamping end and the second clamping end can contact each other to form a connecting ring, and the second lifting ring is connected with the tightening member through the connecting ring; When the first controlled end and the second controlled end compress their respective elastic bodies, the first clamping end and the second clamping end can be separated from each other; The bolt is connected through the bridge pipe, and the tightening member of the auxiliary fixing device is fixedly connected to the bolt to tension the tightening member by rotating the bolt.

2. A bridging device according to claim 1, characterized in that The limiting mechanism includes an inner limiting portion and an outer limiting portion, and the inner limiting portion and the outer limiting portion are respectively located on the inner side and the outer side of the support flaps; The inner limiting portion has a first contact portion for contacting the inner side surface of the support flaps; The outer limiting portion has a second contact portion for contacting the outer side surface of the support flaps, the second contact portion is circular, and when the support flaps contact the outer limiting portion or the inner limiting portion, the major axis of the support flaps and the central axis in the circumferential direction form an included angle.

3. A bridging device according to claim 2, characterised in that The outer limiting portion is provided with an adjusting bolt, and the outer side surface contacts the outer limiting portion through the adjusting bolt.

4. A bridging device according to claim 2, characterised in that The inner limiting portion is slidingly connected with the support body, the first contact portion of the inner limiting portion is circular, the inner limiting portion has a translation freedom in the axial direction of the first contact portion, and the inner limiting portion is further connected with the support body through a tension spring to make the inner limiting portion have a sliding tendency in the axial direction of the first contact portion. The inner side of the supporting side wing is provided with a guide surface, which forms an angle with the axial direction of the first contact part, so that the supporting side wing has a tendency to open under the action of the first contact part.

5. The bridging device of claim 1, wherein, The supporting body has a mounting plane, the first and second arms are respectively hinged to the mounting plane, and the first and second controlled ends are respectively connected with the mounting plane through the elastic bodies.

6. The bridging device of claim 1, wherein, The tool for driving the first and second controlled ends has at least a tubular end, and a notch is formed on the tubular end for avoiding the tightening member, and the tool is in contact with the first and second controlled ends through the end surface of the tubular end.

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