A pipe connection assembly and its pressure-resistant pipe

Abstract

This utility model relates to the field of pipe technology, and more specifically, to a pipe connection assembly and its pressure-resistant pipe. The flange connection structure includes a first flange and a second flange, both of which have through holes. It also includes a nut and a clamping assembly. The clamping assembly includes a clamping shaft, a pressure-bearing rod, and a pressure-bearing slider. The clamping shaft passes through the through holes of both the first and second flanges. The pressure-bearing rod is installed on both sides of the clamping shaft, with one end rotatably connected to the clamping shaft and the other end rotatably connected to the pressure-bearing slider. The second flange has a groove, and the pressure-bearing slider is slidably connected to the groove. The nut is threaded to the outer wall of the clamping shaft and abuts against the first flange. This utility model simplifies the assembly and disassembly process, eliminates the cumbersome operation of using two wrenches simultaneously, reduces the labor intensity of workers, and improves the efficiency of pipe maintenance.

Description

Technical Field

[0001] This utility model relates to the field of pipe technology, and more specifically, to a pipe connection component and a pressure-resistant pipe thereof. Background Technology

[0002] Polyvinyl chloride (PVC) is a material with excellent physical and chemical properties, weather resistance and economy. It is widely used in pipes in many fields such as construction, water supply and drainage, and chemical industry.

[0003] Currently, flange sealing structures are commonly used for connecting PVC pipes. The typical connection method involves threading bolts through the threaded holes on the flanges at both ends of the pipe, and then tightening nuts on both ends of the bolts to achieve a lock and seal. However, for some piping systems with lower sealing requirements, this connection method has significant drawbacks during maintenance and disassembly: operators must use two wrenches simultaneously, or two people each using one wrench to work together. One wrench is used to hold the nut at one end of the bolt to prevent rotation, while the other wrench loosens the nut at the other end to disconnect the connection. This requirement for simultaneous operation with two wrenches not only significantly increases the worker's workload and time, but is also particularly difficult in complex working conditions with limited space, greatly reducing the efficiency and convenience of maintenance work. Utility Model Content

[0004] The purpose of this utility model is to overcome the problem that the existing flange sealing connection structure requires the operator to use two wrenches at the same time for disassembly, and to provide a pipe connection assembly that simplifies the disassembly and assembly steps, eliminates the cumbersome operation of using two wrenches at the same time, reduces the labor intensity of workers, and improves the efficiency of pipeline maintenance. It also provides a pressure-resistant pipe that can effectively improve the pressure resistance of the pipe.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A pipe connection assembly is provided, including a first flange and a second flange, both of which have through holes. The assembly also includes a nut and a clamping assembly. The clamping assembly includes a clamping shaft, a pressure-bearing rod, and a pressure-bearing slider. The clamping shaft passes through the through holes of both the first and second flanges. The pressure-bearing rod is mounted on both sides of the clamping shaft, with one end rotatably connected to the clamping shaft and the other end rotatably connected to the pressure-bearing slider. The second flange has a groove, and the pressure-bearing slider is slidably connected to the groove. The nut is threaded to the outer wall of the clamping shaft and abuts against the first flange.

[0006] In the operation of the above scheme, during installation, the clamping shaft is first inserted sequentially through the corresponding through holes on the first and second flanges. Then, one end of the bearing rod is rotatably connected to the clamping shaft, and the other end is rotatably connected to the bearing slider, while the bearing slider is placed into the pre-set groove on the second flange. Finally, the nut is screwed onto the external thread of the clamping shaft, abutting against the outer end face of the first flange. When the nut is screwed on, the clamping shaft slides axially along the through holes under the drive of the thread, moving from the second flange towards the first flange. This sliding process causes the bearing rods on both sides of the clamping shaft to rotate, causing the included angle between the two bearing rods to gradually increase. The rotation of the bearing rods further pushes the bearing slider to slide within the groove of the second flange until the bearing slider tightly abuts against the end wall of the groove, forming a rigid constraint. At this point, the reverse clamping force generated between the bearing slider and the groove wall balances the preload applied by the nut to the clamping shaft and the first flange, thereby achieving a stable clamping and reliable seal between the two flanges. During disassembly, only one wrench is needed to loosen the nut in the reverse direction, and the above process is carried out in reverse. The clamping shaft retracts, the angle of the bearing rod decreases, and the bearing slider is released from the constraint of the slide wall. Finally, the connecting parts can be easily separated. During the disassembly process, the operator only needs to use one wrench to tighten the nut, which significantly simplifies the operation, reduces the labor intensity of workers, and improves the efficiency of pipeline maintenance while meeting the requirements of sealing strength.

[0007] Furthermore, the clamping shaft includes a sleeve column and a pin. The sleeve column passes through the through holes of the first flange and the second flange. The pin is inserted into the sleeve column and slidably connected to it. The clamping shaft consists of a sleeve column and a pin. Compared with the design of an integral shaft, the sleeve column is provided with a through groove. The bearing rod is rotatably connected to one end of the pin. The length of the through groove along the axial direction of the pin is greater than the length of the bearing rod. The torque generated by tightening the nut is independently borne by the sleeve column, and the pin only performs pure axial sliding. This design eliminates the risk of interference between the rotational motion of the integral shaft and the rotation of the bearing rod, avoids the bearing rod from rotating around the axis of the pin, and ensures that the clamping angle expansion action is stable and controllable. If the length of the through groove is too small, it will interfere with the rotational motion of the bearing rod. If there is not enough space to accommodate the bearing rod, the convenience of disassembly will be reduced.

[0008] Furthermore, the clamping assembly also includes an anchor pin, one end of which is fixedly connected to the pin and the other end is rotatably connected to the bearing rod. Since the connection between the bearing rod and the pin is subjected to a large force, it needs to have sufficient structural strength to ensure that structural failures such as loosening do not occur. At the same time, it is also necessary to ensure that the anchor pin can be easily removed from the bearing rod to avoid interference between the anchor pin and the sleeve column during disassembly, which would prevent the pin from being removed.

[0009] Furthermore, it also includes an elastic element. The inner wall of the bottom of the sleeve column is provided with a groove, and the end of the pin near the bearing rod is provided with a protrusion. The elastic element is fitted onto the protrusion, and the groove is used to accommodate the protrusion. The function of the protrusion is to install the elastic element and prevent it from bending. During the screwing of the nut, when the elastic element is compressed to a certain extent, the protrusion will gradually insert into the groove. At the same time, the elastic element is compressed, buffering the pre-tightening force of the nut while providing a reverse elastic force to make the bearing rods on both sides gradually rotate and open, thus achieving the function of clamping.

[0010] Furthermore, the inner walls on both sides of the slide groove are provided with guide grooves, and the sides of the pressure-bearing slider are provided with guide protrusions, which are connected to the guide grooves. When the pressure-bearing slider is not under force, it is easy to fall out of the slide groove. Therefore, the connection structure between the guide protrusions and the guide grooves is provided to prevent the pressure-bearing slider from falling out, and at the same time, it can guide the pressure-bearing slider to slide.

[0011] Furthermore, it also includes a seal, which is installed between the first flange and the second flange; the seal is installed on the end faces of the two flanges to prevent liquid leakage.

[0012] A pressure-resistant pipe, wherein a first flange and a second flange are respectively provided at both ends of the pipe body, the first flange of the pipe body and the second flange of the other pipe body are connected to the clamping assembly through the nut; a first spiral reinforcing rib is provided on the outer wall of the pipe body.

[0013] During operation, multiple sections of the aforementioned pressure-resistant pipe are connected to the first flange and the second flange, and are tightened and sealed using a clamping assembly and nuts to form a complete pipeline. After installation, when the pipeline is buried underground, the first spiral reinforcing rib directly bears the external load and distributes the pressure to the entire pipe wall, thereby improving the external compressive strength.

[0014] Furthermore, the inner wall of the tube is provided with a second spiral reinforcing rib; when high-pressure liquid is introduced into the tube, the inner wall of the tube is also able to distribute the pressure to the entire tube wall through the second spiral reinforcing rib, thereby improving the compressive strength of the tube.

[0015] Furthermore, the wall of the pipe body is divided into a pressure-resistant layer, a cavity layer, and an anti-corrosion layer. The pressure-resistant layer is the outermost layer, the anti-corrosion layer is the innermost layer, and the cavity layer is located between the pressure-resistant layer and the anti-corrosion layer. A pressure-bearing medium is disposed in the cavity of the cavity layer, and the pressure-bearing medium abuts against the pressure-resistant layer and the anti-corrosion layer. The outer layer is a pressure-resistant layer, and the material of the pressure-resistant layer is glass fiber. The flexible structure of glass fiber can absorb impact energy, making the pipe body less prone to breakage. The inner layer is made of anti-corrosion material to prevent liquid from corroding the pipe body.

[0016] Furthermore, the pressure-bearing medium is a corrugated steel strip; the corrugated steel strip can suppress the radial deformation of the pipe body under pressure and improve the radial compressive strength of the pipe body.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. Both the first and second flanges are provided with through holes, and also include a nut and a clamping assembly. The clamping assembly includes a clamping shaft, a pressure rod, and a pressure sliding block. The clamping shaft passes through the through holes of the first and second flanges. The pressure rod is installed on both sides of the clamping shaft, with one end of the pressure rod rotatably connected to the clamping shaft and the other end rotatably connected to the pressure sliding block. The second flange is provided with a sliding groove, and the pressure sliding block is slidably connected to the sliding groove. The nut is threaded to the outer wall of the clamping shaft and abuts against the first flange. Only one nut is used during installation, and during disassembly, the operator only needs to use a wrench to tighten the nut, which significantly simplifies the operation, reduces the labor intensity of workers, and improves the efficiency of pipeline maintenance while meeting the requirements of sealing strength.

[0018] 2. The outer wall of the pressure-resistant pipe is provided with a first spiral reinforcing rib, and the inner wall of the pipe is provided with a second spiral reinforcing rib. The first spiral reinforcing rib directly bears the external load and effectively improves the external compressive strength by distributing the pressure to the entire pipe wall. Similarly, the second spiral reinforcing rib distributes the pressure to the entire pipe wall, effectively improving the internal compressive strength of the pipe. Attached Figure Description

[0019] Figure 1 A perspective view of a pipe connection assembly; Figure 2 This is a schematic diagram of the internal structure of a pipe connection assembly; Figure 3 This is a schematic diagram of the sealing installation structure of a pipe connection assembly; Figure 4 This is a schematic diagram of a pipe connection assembly in which a pressure-bearing slider and a sliding groove are slidably connected. Figure 5 This is a three-dimensional diagram of a pressure-resistant pipe material; Figure 6 This is a schematic diagram of the internal structure of a pressure-resistant pipe.

[0020] In the attached diagram: 100, First flange; 200, Second flange; 210, Slide groove; 211, Guide groove; 300, Nut; 400, Clamping assembly; 410, Clamping shaft; 411, Sleeve column; 412, Pin; 413, Through groove; 414, Groove; 415, Protrusion; 420, Pressure-bearing rod; 430, Pressure-bearing slider; 431, Guide protrusion; 440, Anchor; 500, Elastic element; 600, Pipe body; 610, First spiral reinforcing rib; 620, Second spiral reinforcing rib; 630, Pressure-resistant layer; 640, Cavity layer; 641, Pressure-bearing medium; 650, Anti-corrosion layer; 700, Sealing element. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0022] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] Example 1 This embodiment is a first embodiment of a pipe connection assembly, such as... Figures 1 to 2 As shown, the assembly includes a first flange 100 and a second flange 200, both of which have through holes. It also includes a nut 300 and a clamping assembly 400. The clamping assembly 400 includes a clamping shaft 410, a pressure rod 420, and a pressure slider 430. The clamping shaft 410 passes through the through holes of both the first flange 100 and the second flange 200. The pressure rod 420 is mounted on both sides of the clamping shaft 410, with one end rotatably connected to the clamping shaft 410 and the other end rotatably connected to the pressure slider 430. The second flange 200 has a groove 210, and the pressure slider 430 is slidably connected to the groove 210. The nut 300 is threadedly connected to the outer wall of the clamping shaft 410 and abuts against the first flange 100.

[0024] Specifically, the clamping shaft component 410 includes a sleeve post 411 and a pin 412. The sleeve post 411 passes through the through holes of the first flange 100 and the second flange 200. The pin 412 is inserted into the sleeve post 411 and slidably connected to it. The clamping shaft component 410 is composed of the sleeve post 411 and the pin 412. Compared with the design of an integral shaft, the sleeve post 411 is provided with a through groove 413. The pressure rod 420 is rotatably connected to one end of the pin 412. The length of the through groove 413 along the axial direction of the pin 412 is greater than... The length of the bearing rod 420; the torque generated by the tightening of the nut 300 is independently borne by the sleeve column 411, and the pin 412 only performs pure axial sliding. This design eliminates the risk of interference of the overall shaft rotation motion to the rotation of the bearing rod 420, avoids the bearing rod 420 from rotating around the axis of the pin 412, and ensures that the clamping angle expansion action is stable and controllable. If the length of the through groove 413 is too small, it will interfere with the rotation motion of the bearing rod 420. If there is not enough space to accommodate the bearing rod 420, the convenience of disassembly will be reduced.

[0025] The working principle of a pipe connection assembly in this embodiment is as follows: During installation, the sleeve column 411 is inserted into the corresponding through holes on the first flange 100 and the second flange 200. Then, the pin 412 is inserted into the sleeve column 411. Subsequently, one end of the pressure rod 420 is rotatably connected to the pin 412, and the other end passes through the through groove 413 and is rotatably connected to the pressure slider 430. Simultaneously, the pressure slider 430 is placed into the pre-set groove 210 of the second flange 200. Then, the nut 300 is screwed onto the external thread of the clamping shaft 410, making it abut against the outer end face of the first flange 100. During the screwing of the nut 300, the sleeve column 411 slides axially along the through holes from the second flange 200 towards the first flange 100 under the drive of the threads. Simultaneously, the pressure rod 420 rotates, causing the included angle between the two pressure rods 420 to gradually increase. The rotation of the pressure rod 420 further pushes the pressure slider 430 to slide within the groove 210 of the second flange 200 until the pressure slider 430 tightly abuts against the end wall of the groove 210, forming a rigid abutment constraint. At this time, the reverse clamping force generated between the pressure slider 430 and the wall of the groove 210 is balanced with the preload force applied by the nut 300 to the clamping shaft 410 and the first flange 100, achieving a stable clamping and reliable seal between the two flanges. During disassembly, simply use a wrench to loosen the nut 300 in the reverse direction, the clamping shaft 410 retracts, the included angle of the pressure rod 420 decreases, the clamping force between the pressure slider 430 and the groove 210 disappears, and after removing the pressure rod 420 from the pin 412, the pin 412 can be removed from the sleeve column 411, completing the disassembly.

[0026] The beneficial effects of this embodiment are: during the disassembly process, the operator only needs to use a wrench to tighten the nut 300, which significantly simplifies the operation, reduces the labor intensity of workers, and improves the efficiency of pipeline maintenance while meeting the requirements of sealing strength.

[0027] Example 2 This embodiment is a second embodiment of a pipe connection assembly, such as... Figures 2 to 4 As shown, the difference from Embodiment 1 is as follows: Specifically, the clamping assembly 400 also includes an anchor 440, one end of which is fixedly connected to the pin 412, and the other end is rotatably connected to the pressure rod 420. Since the connection between the pressure rod 420 and the pin 412 is subjected to a large force, it needs to have sufficient structural strength to ensure that there will be no structural failure such as loosening. At the same time, it is also necessary to ensure that the anchor 440 can be easily removed from the pressure rod 420, so as to avoid interference between the anchor 440 and the sleeve post 411 during the disassembly process, which would prevent the pin 412 from being removed.

[0028] The anchor 440 and the pin 412 can be connected by threads. A threaded hole is provided on the cylindrical surface of the pin 412. During installation, the anchor 440 is first screwed into the threaded hole on the pin 412, and then the bearing rod 420 is installed.

[0029] Specifically, it also includes an elastic element 500. The inner wall of the bottom of the sleeve column 411 is provided with a groove 414. The end of the pin 412 near the bearing rod 420 is provided with a protrusion 415. The elastic element 500 is fitted onto the protrusion 415. The groove 414 is used to accommodate the protrusion 415. The function of the protrusion 415 is to install the elastic element 500 and prevent the elastic element 500 from bending. During the screwing of the nut 300, when the elastic element 500 is compressed to a certain extent, the protrusion 415 will gradually insert into the groove 414. At the same time, the compression of the elastic element 500 buffers the pre-tightening force of the nut 300 and provides a reverse elastic force to make the bearing rods 420 on both sides gradually rotate and open, so as to achieve the function of pressing.

[0030] Specifically, guide grooves 211 are provided on the inner walls of both sides of the slide groove 210, and guide protrusions 431 are provided on both sides of the pressure-bearing slider 430. The guide protrusions 431 are connected to the guide grooves 211. When the pressure-bearing slider 430 is not under force, it is easy to fall out of the slide groove 210. Therefore, the connection structure between the guide protrusions 431 and the guide grooves 211 is provided to prevent the pressure-bearing slider 430 from falling out, and at the same time, it can guide the pressure-bearing slider 430 to slide.

[0031] Specifically, it also includes a seal 700, which is installed between the first flange 100 and the second flange 200; the seal 700 is installed on the end faces of the two flanges to prevent liquid leakage.

[0032] The working principle of a pipe connection assembly in this embodiment is as follows: During the tightening of the nut 300, the sleeve 411 slides axially along the through hole from the second flange 200 toward the first flange 100 under the threaded drive. The bottom surface of the pressure-bearing slider 430 is subjected to pressure, which is transmitted to the pin 412 through the pressure-bearing rod 420, keeping the pin 412 stationary relative to the first flange 100 or the second flange 200. The sleeve 411 slides relative to the pin 412, and the elastic element 500 begins to be compressed. After the sleeve 411 slides a certain distance, the protrusion on the pin 412 inserts into the groove 414 at the bottom of the sleeve 411. When the side of the pressure-bearing slider 430 abuts against the side of the slide groove 210, the reverse clamping force generated between the pressure-bearing slider 430 and the wall of the slide groove 210 is transmitted along the pressure-bearing rod 420 to the pin 412, then to the elastic element 500, and finally to the sleeve 411, causing the sleeve 411 to stop sliding and completing the tightening installation process.

[0033] The beneficial effects of this embodiment are: the connection between the bearing rod 420 and the pin 412 is achieved by the anchor 440, which ensures the connection strength and avoids interference between the anchor 440 and the sleeve column 411 during disassembly.

[0034] Example 3 This embodiment is a first embodiment of a pressure-resistant pipe, such as... Figures 5 to 6 As shown, a first flange 100 and a second flange 200 are respectively provided at both ends of the pipe body 600. The first flange 100 of the pipe body 600 and the second flange 200 of the other pipe body 600 are connected to the clamping assembly 400 through a nut 300. A first spiral reinforcing rib 610 is provided on the outer wall of the pipe body 600.

[0035] Specifically, the inner wall of the tube body 600 is provided with a second spiral reinforcing rib 620; when high-pressure liquid is introduced into the tube body 600, the inner wall of the tube body 600 is also able to distribute the pressure to the entire tube body 600 wall through the second spiral reinforcing rib 620, thereby improving the internal pressure resistance of the tube body 600.

[0036] Specifically, the wall of the pipe body 600 is divided into a pressure-resistant layer 630, a cavity layer 640, and an anti-corrosion layer 650. The pressure-resistant layer 630 is the outermost layer, the anti-corrosion layer 650 is the innermost layer, and the cavity layer 640 is located between the pressure-resistant layer 630 and the anti-corrosion layer 650. The cavity of the cavity layer 640 contains a pressure-bearing medium 641, which abuts against the pressure-resistant layer 630 and the anti-corrosion layer 650. The outer layer is the pressure-resistant layer 630, which is made of glass fiber. The flexible structure of glass fiber can absorb impact energy, making the pipe body 600 less prone to breakage. The inner layer is made of anti-corrosion material to prevent liquid from corroding the pipe body 600.

[0037] Specifically, the pressure-bearing medium 641 is a corrugated steel strip; the corrugated steel strip can suppress the radial deformation of the pipe body 600 under pressure and improve the radial compressive strength of the pipe body 600.

[0038] The working principle of a pipe connection assembly in this embodiment is as follows: When the pipe is buried underground, the first spiral reinforcing rib 610 directly bears the external load and distributes the local load to the entire pipe wall of the pipe body 600, while the second spiral reinforcing rib 620 distributes the local pressure inside the pipe body 600 to the entire pipe wall of the pipe body 600.

[0039] The beneficial effects of this embodiment are: the arrangement of the first spiral reinforcing rib 610 and the second spiral reinforcing rib 620 can disperse the local load or pressure inside and outside the tube body 600 to the whole tube body 600, avoid stress concentration, and effectively improve the compressive strength.

[0040] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pipe connection assembly, comprising a first flange (100) and a second flange (200), wherein both the first flange (100) and the second flange (200) are provided with through holes, characterized in that, It also includes a nut (300) and a clamping assembly (400). The clamping assembly (400) includes a clamping shaft (410), a pressure rod (420), and a pressure slider (430). The clamping shaft (410) passes through the through holes of the first flange (100) and the second flange (200). The pressure rod (420) is installed on both sides of the clamping shaft (410), with one end of the pressure rod (420) rotatably connected to the clamping shaft (410) and the other end of the pressure rod (420) rotatably connected to the pressure slider (430). The second flange (200) is provided with a groove (210), and the pressure slider (430) is slidably connected to the groove (210). The nut (300) is threaded to the outer wall of the clamping shaft (410) and abuts against the first flange (100).

2. The pipe connection assembly according to claim 1, characterized in that, The clamping shaft (410) includes a sleeve column (411) and a pin (412). The sleeve column (411) passes through the through holes of the first flange (100) and the second flange (200). The pin (412) is inserted into the sleeve column (411) and slidably connected to the sleeve column (411). The sleeve column (411) is provided with a through groove (413). The pressure rod (420) is rotatably connected to one end of the pin (412). The length of the through groove (413) along the axial direction of the pin (412) is greater than the length of the pressure rod (420).

3. A pipe connection assembly according to claim 2, characterized in that, The clamping assembly (400) further includes an anchor (440), one end of which is fixedly connected to the pin (412), and the other end is rotatably connected to the pressure rod (420).

4. A pipe connection assembly according to claim 2, characterized in that, It also includes an elastic element (500), the inner wall of the bottom of the sleeve column (411) is provided with a groove (414), the end of the pin (412) near the bearing rod (420) is provided with a protrusion (415), the elastic element (500) is fitted on the protrusion, and the groove (414) is used to accommodate the protrusion (415).

5. A pipe connection assembly according to claim 1, characterized in that, The inner walls of both sides of the slide groove (210) are provided with guide grooves (211), and the two sides of the pressure-bearing slider (430) are provided with guide protrusions (431), which are connected to the guide grooves (211).

6. A pipe connection assembly according to any one of claims 1-5, characterized in that, It also includes a seal (700) installed between the first flange (100) and the second flange (200).

7. A pressure-resistant pipe, comprising several pipe sections (600), characterized in that, The two ends of the pipe body (600) are respectively provided with a first flange (100) and a second flange (200) of the pipe connection assembly according to claim 1. The first flange (100) of the pipe body (600) and the second flange (200) of the other pipe body (600) are connected to the clamping assembly (400) through the nut (300); the outer wall of the pipe body (600) is provided with a first spiral reinforcing rib (610).

8. The pressure-resistant pipe according to claim 7, characterized in that, The inner wall of the tube (600) is provided with a second spiral reinforcing rib (620).

9. A pressure-resistant pipe according to claim 7, characterized in that, The wall of the pipe body (600) is divided into a pressure-resistant layer (630), a cavity layer (640), and an anti-corrosion layer (650). The pressure-resistant layer (630) is the outermost layer, and the anti-corrosion layer (650) is the innermost layer. The cavity layer (640) is located between the pressure-resistant layer (630) and the anti-corrosion layer (650). A pressure-bearing medium (641) is provided in the cavity of the cavity layer (640), and the pressure-bearing medium (641) abuts against the pressure-resistant layer (630) and the anti-corrosion layer (650).

10. A pressure-resistant pipe according to claim 9, characterized in that, The pressure-bearing medium (641) is a corrugated steel strip.

Images