Reinforced concrete pipe connecting structure and connecting construction method

Abstract

The invention discloses a reinforced concrete pipe connecting structure and a connecting construction method, and relates to the technical field of building construction.The reinforced concrete pipe connecting structure comprises a plurality of pipe sections, annular grooves are formed in the inner walls of the ends of the pipe sections, and fixing grooves are formed in the outer walls of the ends of the pipe sections; an inner steel ring; the axes of the outer steel ring and the inner steel ring coincide, and the end of the pipe section can be inserted between the outer steel ring and the inner steel ring. According to the sealing ring, the sealant, the inner steel ring and the outer steel ring, the sealing performance of the connecting position of the pipe sections is effectively improved, the fixing plates are bent and buckled into the fixing grooves in the outer walls of the pipe sections, so that the connecting stability of the pipe sections is improved, and the pipeline can adapt to differential settlement and deformation to a certain degree through the flexible and rigid connecting mode; pipeline damage caused by foundation settlement and the like is reduced, the outer steel ring is horizontally pulled through the winch, so that coaxial connection of all the pipe sections is facilitated, the connection tightness between the pipe sections is improved, the construction method is simple and easy to implement, operation is convenient, the construction efficiency is high, and the cost is relatively low.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a reinforced concrete pipe connection structure and a connection construction method. Background Art

[0002] Concrete pipes are pipes made of concrete or reinforced concrete, mainly used to transport fluids such as water, oil, and gas. In the fields of municipal engineering and water conservancy projects, reinforced concrete pipes are widely used in drainage, water supply and other pipeline systems. There are two main ways to connect reinforced concrete pipes: rigid connection and flexible connection. Rigid connections usually use socket connections and fill the interface with sealing materials, while flexible connections mostly use rubber rings for sealing.

[0003] The socket connection method has a weak ability to resist external forces such as uneven settlement and earthquakes, while the rubber ring sealing connection method makes the pipe connection have better deformation adaptability, but the connection stability and sealing are relatively poor. In addition, both methods require auxiliary tools for positioning during installation, which is not very convenient to install. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a connection structure and a connection construction method that are convenient for installing and connecting reinforced concrete pipes and effectively improve the sealing of the connection.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A reinforced concrete pipe connection structure, comprising:

[0007] A plurality of pipe sections, each pipe section has an annular groove on its inner wall at the end and a fixing groove on its outer wall at the end;

[0008] Inner steel ring;

[0009] The outer steel ring, the axis of the outer steel ring coincides with the inner steel ring, the end of the pipe section can be inserted between the outer steel ring and the inner steel ring, and a supporting steel ring is fixedly connected between the outer steel ring and the inner steel ring;

[0010] Two fixing rings are respectively arranged on both sides of the supporting steel ring, the fixing rings are provided with step grooves on the outside, and sealing rings are sleeved on the outside of the step grooves;

[0011] Multiple fixing plates are provided on both sides of the outer steel ring, and hook-shaped grooves are provided on the fixing plates. One end of a pull rope is hooked into the hook-shaped groove, and the pull rope is pulled to make the outer steel ring drive a fixing ring to be tightly inserted into an annular groove, so that the sealing ring is tightly attached to the inner wall of the annular groove. The fixing plates on both sides of the outer steel ring can be bent to be buckled into the fixing grooves of two adjacent pipe sections respectively.

[0012] Furthermore, a first groove is provided on the outer wall of the end of the pipe section, and the outer steel ring can be sleeved on the outside of the first groove, and the outer diameter of the outer steel ring is consistent with the outer diameter of the pipe section, and the inner diameter of the inner steel ring is consistent with the inner diameter of the pipe section.

[0013] Furthermore, the fixing ring is conical and matches the shape of the annular groove. A plurality of stepped grooves are provided, each stepped groove is arranged at intervals outside the fixing ring, and the cross section of the sealing ring is circular.

[0014] Furthermore, first sealing rings are provided on both sides of the supporting steel ring, and the first sealing ring is located between the pipe section and the supporting steel ring.

[0015] Furthermore, a second sealing ring is provided on one side of the fixing ring, the cross-section of the second sealing ring is L-shaped, an annular groove is provided at the end of the fixing ring, one end of the second sealing ring can be inserted into the annular groove, the second sealing ring is located between the pipe section and the inner steel ring, and the inner diameter of the second sealing ring is consistent with the inner diameter of the pipe section.

[0016] Furthermore, a plurality of fixing grooves are provided, and each fixing groove is arranged around the outside of the pipe section. A plurality of fixing plates are provided, and each fixing plate is arranged around the pipe section, so that each fixing plate can be bent and inserted into a fixing groove.

[0017] Furthermore, it also includes a fixed steel ring, which is sleeved on the outside of the pipe section and is provided with bolts. The inside of the fixed steel ring is slidably connected with a fixed block, and the fixed block is provided with a threaded groove. One end of the bolt is threadedly connected to the inside of the threaded groove. When the bolt rotates, the fixed block moves and pushes the fixed plate, so that the fixed plate is bent and inserted into the fixed groove.

[0018] Furthermore, one side of the fixing groove and one side of the fixing block are both inclined surfaces so as to clamp the fixing plate in the fixing groove.

[0019] Furthermore, it also includes a bracket, on which a winch is provided. The bracket is used to support one end of the pipe section. One end of the pull rope can be put into the hook-shaped groove and the other end is connected to the winch. A pulley is provided on the bracket. The pull rope passes around the outside of the pulley. The height of the pulley is consistent with the height of the fixed plate so that the pull rope can pull the fixed plate horizontally.

[0020] In view of the above-mentioned reinforced concrete pipe connection structure, the present invention provides a reinforced concrete pipe connection construction method, comprising the following steps:

[0021] S1: Dig a trench and compact the bottom of the trench, then construct a sand and gravel cushion layer and lay and compact it;

[0022] S2: Fix the bracket to the well position in the groove by bolts, and ensure that one side of the bracket is located at the well wall and remains vertical;

[0023] S3: Dig a pit on the cushion layer according to the length of the pipe section. The pit is located at the connection of the pipe section. Lift the pipe section into the groove so that one end of the pipe section fits against one side of the bracket.

[0024] S4: Put the fixing ring on the outside of the inner steel ring, apply talcum powder on the sealing ring, and put it on the outside of the stepped groove of the fixing ring, and evenly apply a layer of two-component polysulfide sealant on the inner surface of the fixing groove of the pipe section;

[0025] S5: Install one end of the pull rope in the hook-shaped groove of the fixing plate, align the fixing ring with the annular groove, then start the winch, the winch reels the pull rope, thereby pulling the fixing plate horizontally, making the outer steel ring close to the pipe section, and the supporting steel ring pushes the fixing ring to be inserted into the annular groove, so that the sealing ring is tightly attached to the inner wall of the annular groove;

[0026] S5: Remove the pull rope, repeat S3-S5, and install the next pipe section, so that the two pipe sections are tightly connected;

[0027] S6: Move the fixing steel ring that is pre-sleeved on the outside of the pipe section to the connection between the two pipe sections, and make the bolts correspond to the fixing grooves of the pipe sections. Then, tighten the bolts to insert the fixing blocks into the fixing grooves, and bend the fixing plates to buckle into the fixing grooves.

[0028] S7: Repeat S3-S6 to connect multiple pipe sections.

[0029] The beneficial effects of the present invention are:

[0030] In the present invention, the sealing performance of the pipe section connection is effectively improved by the sealing ring, the sealant and the inner and outer steel rings, and the leakage is prevented. The fixing plate is bent and buckled into the fixing groove on the outer wall of the pipe section, thereby improving the stability of the pipe section connection, being able to withstand a large axial force and bending moment, improving the overall bearing capacity of the pipeline system, and further improving the connection stability and sealing effect between the pipe sections. The flexible and rigid connection mode enables the pipeline to adapt to a certain degree of uneven settlement and deformation, and reduces pipeline damage caused by foundation settlement and other reasons.

[0031] During the installation process, the outer steel ring is pulled horizontally by a winch, thereby applying horizontal force to the pipe section, facilitating the coaxial connection of the pipe sections, ensuring the coaxiality of the pipe sections, and allowing the fixing ring to be tightly inserted into the pipe section to improve the tightness of the connection between the pipe sections. The construction method is simple and easy, easy to operate, highly efficient, and relatively low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A three-dimensional structural schematic diagram of a reinforced concrete pipe connection structure proposed by the present invention;

[0033] Figure 2A schematic diagram of the three-dimensional structure of an outer steel ring, an inner steel ring, a fixing ring and a second sealing ring of a reinforced concrete pipe connection structure proposed by the present invention;

[0034] Figure 3 A schematic diagram of an outer steel ring, an inner steel ring, a fixing ring, a sealing ring and an exploded structure of the sealing ring of a reinforced concrete pipe connection structure proposed by the present invention;

[0035] Figure 4 A cross-sectional structural schematic diagram of a reinforced concrete pipe connection structure proposed by the present invention;

[0036] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of part A;

[0037] Figure 6 A schematic diagram of a fixed plate structure of a reinforced concrete pipe connection structure proposed by the present invention;

[0038] Figure 7 This is a structural schematic diagram of a reinforced concrete pipe connection structure proposed by the present invention after a fixing plate is buckled into a fixing groove.

[0039] In the figure: 1 bracket, 2 winch, 3 pull rope, 4 pulley, 5 pipe section, 501 fixed groove, 502 annular groove, 6 fixed steel ring, 7 outer steel ring, 701 fixed plate, 702 hook groove, 8 support steel ring, 9 inner steel ring, 10 first sealing ring, 11 fixing ring, 1101 stepped groove, 12 sealing ring, 13 second sealing ring, 14 bolt, 15 fixing block. DETAILED DESCRIPTION

[0040] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0043] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0044] Example 1

[0045] Reference Figure 1-7 A reinforced concrete pipe connection structure is used for the connection of reinforced concrete pipes in order to improve the sealing and stability of the pipe section connection and facilitate the connection and installation of the pipe section.

[0046] The reinforced concrete pipe connection structure comprises an inner steel ring 9, an outer steel ring 7, a fixing plate 701, two fixing rings 11, a fixing steel ring 6, a bracket 1 and a pull rope 3;

[0047] The bracket 1 is welded by I-beam and channel steel, and a winch 2 is fixedly connected to the bracket 1. One end of a pull rope 3 is connected to the winch 2. A pulley 4 is provided on the bracket 1, and the pull rope 3 passes around the outside of the pulley 4. The bracket 1 is used to support one end of the pipe section 5, so as to position and fix one end of the pipe section 5. An annular groove 502 is provided on the inner wall of the end of the pipe section 5 for positioning and connecting the fixing ring 11.

[0048] The axes of the outer steel ring 7 and the inner steel ring 9 coincide with each other, and a supporting steel ring 8 is fixedly connected between the outer steel ring 7 and the inner steel ring 9. The outer wall of the end of the pipe section 5 is provided with a first groove, and the outer steel ring 7 can be sleeved on the outside of the first groove. The outer diameter of the outer steel ring 7 is consistent with the outer diameter of the pipe section 5, and the inner diameter of the inner steel ring 9 is consistent with the inner diameter of the pipe section 5. When the end of the pipe section 5 is inserted between the outer steel ring 7 and the inner steel ring 9, the inner steel ring 9 ensures a smooth connection of the inner wall of the pipe section 5, and the outer steel ring 7 ensures a smooth connection of the outer wall of the pipe section 5.

[0049] The two fixing rings 11 are respectively arranged on both sides of the supporting steel ring 8. The fixing rings 11 are conical and adapted to the shape of the annular groove 502, so as to ensure that after the fixing ring 11 is tightly inserted into the annular groove 502, the axis centers coincide with each other, thereby improving the coaxiality of the pipe section 5 after installation, and also facilitating the insertion and installation of the pipe section 5. A plurality of step grooves 1101 are arranged on the outside of the fixing ring 11, and each step groove 1101 is arranged on the outside of the fixing ring 11 at intervals. A sealing ring 12 is provided on the outside of each step groove 1101. The cross-section of the sealing ring 12 is circular. After the fixing ring 11 is tightly inserted into the annular groove 502, the sealing rings 12 on the outside of the plurality of step grooves 1101 can fit tightly with the inner wall of the annular groove 502, thereby ensuring the sealing of the connection of the pipe section 5.

[0050] Fixed plates 701 are provided on both sides of the outer steel ring 7. A hook-shaped groove 702 is provided on the fixed plate 701. One end of the pull rope 3 can be inserted into the hook-shaped groove 702. The winch 2 can pull the pull rope 3. Since the height of the pulley 4 is consistent with the height of the fixed plate 701, the pull rope 3 can pull the fixed plate 701 horizontally, so that the outer steel ring 7 drives a fixed ring 11 to be inserted into an annular groove 502, so that after the fixed ring 11 is tightly inserted into the annular groove 502, it is ensured that the sealing ring 12 is tightly attached to the inner wall of the annular groove 502.

[0051] A second sealing ring 13 is provided on one side of the fixing ring 11. The cross-section of the second sealing ring 13 is L-shaped. An annular groove is provided at the end of the fixing ring 11. One end of the second sealing ring 13 can be inserted into the annular groove. The second sealing ring 13 is located between the pipe section 5 and the inner steel ring 9, and the inner diameter of the second sealing ring 13 is consistent with the inner diameter of the pipe section 5. After the fixing ring 11 is tightly inserted into the annular groove 502, the second sealing ring 13 will be located between the pipe section 5 and the inner steel ring 9, thereby sealing the inner wall of the pipe section 5 and improving the sealing of the connection of the pipe section 5.

[0052] A first sealing ring 10 is provided on both sides of the supporting steel ring 8. The first sealing ring 10 is located between the pipe section 5 and the supporting steel ring 8. After the fixing ring 11 is tightly inserted into the annular groove 502, the end of the pipe section 5 and the supporting steel ring 8 are sealed by the first sealing ring 10, thereby further improving the connection sealing.

[0053] The outer wall of the end of the pipe section 5 is provided with a plurality of fixing grooves 501, and each fixing groove 501 is arranged around the outside of the pipe section 5. A plurality of fixing plates 701 are provided, and each fixing plate 701 is arranged around the pipe section 5. The fixing steel ring 6 is sleeved on the outside of the pipe section 5. The fixing steel ring 6 is provided with a bolt 14. The inside of the fixing steel ring 6 is slidably connected with a fixing block 15. The fixing block 15 is provided with a threaded groove. One end of the bolt 14 is threadedly connected to the inside of the threaded groove. Each fixing plate 701 corresponds to each fixing groove 501 one by one. When the bolt 14 rotates, the fixing block 15 moves, thereby pushing the fixing plate 701, so that the fixing plate 701 is bent and inserted into the fixing groove 501. One side of the fixing groove 501 and one side of the fixing block 15 are both inclined surfaces, so as to clamp the fixing plate 701 in the fixing groove 501, so that two adjacent connected pipe sections 5 are connected through the mutually buckled fixing plates 701, thereby improving the stability of the connection of the pipe sections 5.

[0054] Example 2

[0055] In view of the above-mentioned reinforced concrete pipe connection structure, this embodiment provides a reinforced concrete pipe connection construction method, comprising the following steps:

[0056] S1: Dig a trench and compact the bottom of the trench, then construct a sand and gravel cushion layer and lay and compact it;

[0057] S2: Fix the support 1 at the well position in the groove by bolts, and ensure that one side of the support 1 is located at the well wall and remains vertical, so that when the first pipe section 5 is attached to one side of the support 1, the end of the pipe section 5 is flush with the well wall;

[0058] S3: Dig a pit on the cushion layer according to the length of the pipe section 5. The pit is located at the connection of the pipe section 5. The pit is convenient for fixing the steel ring 6 in the later stage. Lift the pipe section 5 into the groove so that one end of the pipe section 5 is in contact with one side of the bracket 1.

[0059] S4: Put the fixing ring 11 on the outside of the inner steel ring 9, apply talcum powder on the sealing ring 12 to reduce friction, so as to facilitate putting it on the outside of the stepped groove 1101 of the fixing ring 11, and then evenly apply a layer of two-component polysulfide sealant on the inner surface of the fixing groove 501 of the pipe section 5 to improve the sealing effect;

[0060] S5: Wrap the pull rope 3 around the pulley 4, and install one end of the pull rope 3 in the hook-shaped groove 702 of the fixed plate 701, and then align the fixed ring 11 with the annular groove 502, then start the winch 2, the winch 2 reels the pull rope 3, and then pulls the fixed plate 701 horizontally through the pulley 4, and the fixed plate 701 drives the outer steel ring 7 to approach the pipe section 5, so that the supporting steel ring 8 pushes the fixed ring 11 to be inserted into the annular groove 502, so that the sealing ring 12 is tightly attached to the inner wall of the annular groove 502. Since the fixed ring 11 is conical and the outer wall is adapted to the annular groove 502, it can be ensured that when the fixed ring 11 is tightly inserted into the annular groove 502, the axis of the pipe section 5 coincides with the axis of the fixed ring 11, thereby ensuring the coaxiality of each pipe section 5 after connection;

[0061] S5: remove the pull rope 3, repeat S3-S5, install the next pipe section 5 at the other end of the installed pipe section 5, and also use the pulling force of the pull rope 3 to make the two pipe sections 5 tightly connected;

[0062] S6: Move the fixing steel ring 6 which is put on the outside of the pipe section 5 in advance to the connection between the two pipe sections 5, so that it covers the outside of the outer steel ring 7, and make the bolt 14 correspond to the fixing groove 501 of the pipe section 5, then screw the bolt 14, the bolt 14 rotates, so that the fixing block 15 slides inside the fixing steel ring 6, so that its lower part is inserted into the fixing groove 501, and during the insertion process of the fixing block 15, the fixing plate 701 is pushed and bent, so that it is buckled into the fixing groove 501, so that the two pipe sections 5 are fixedly connected through the fixing plate 701, and at this time, the fixing block 15 clamps the fixing plate 701 in the fixing groove 501, so as to ensure the stability of the connection of the pipe section 5;

[0063] S7: Repeat S3-S6 to connect multiple pipe sections 5.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A reinforced concrete pipe connection structure, characterized in that: include: A plurality of pipe segments (5), each of the pipe segments (5) having an inner wall at the end thereof provided with an annular groove (502) and an outer wall at the end thereof provided with a fixing groove (501); Inner steel ring (9); An outer steel ring (7), wherein the axes of the outer steel ring (7) and the inner steel ring (9) coincide with each other, the end of the pipe section (5) can be inserted between the outer steel ring (7) and the inner steel ring (9), and a supporting steel ring (8) is fixedly connected between the outer steel ring (7) and the inner steel ring (9); Two fixing rings (11) are respectively arranged on both sides of the supporting steel ring (8); a stepped groove (1101) is arranged outside the fixing ring (11), and a sealing ring (12) is sleeved outside the stepped groove (1101); A plurality of fixing plates (701) are provided on both sides of the outer steel ring (7), and a hook-shaped groove (702) is provided on the fixing plate (701). One end of a pull rope (3) is hooked on the hook-shaped groove (702), and the pull rope (3) is pulled, so that the outer steel ring (7) drives a fixing ring (11) to be tightly inserted into an annular groove (502), so that the sealing ring (12) is tightly attached to the inner wall of the annular groove (502). The fixing plates (701) on both sides of the outer steel ring (7) can be bent to be respectively buckled into the fixing grooves (501) of two adjacent pipe sections (5).

2. A reinforced concrete pipe connection structure according to claim 1, characterized in that: The outer wall of the end of the pipe section (5) is provided with a first groove, and the outer steel ring (7) can be sleeved on the outside of the first groove, and the outer diameter of the outer steel ring (7) is consistent with the outer diameter of the pipe section (5), and the inner diameter of the inner steel ring (9) is consistent with the inner diameter of the pipe section (5).

3. A reinforced concrete pipe connection structure according to claim 1, characterized in that: The fixing ring (11) is conical and matches the shape of the annular groove (502). A plurality of stepped grooves (1101) are provided, and each stepped groove (1101) is arranged at intervals outside the fixing ring (11). The sealing ring (12) has a circular cross-section.

4. A reinforced concrete pipe connection structure according to claim 1, characterized in that: First sealing rings (10) are provided on both sides of the supporting steel ring (8), and the first sealing ring (10) is located between the pipe section (5) and the supporting steel ring (8).

5. A reinforced concrete pipe connection structure according to claim 1, characterized in that: A second sealing ring (13) is provided on one side of the fixing ring (11), the cross section of the second sealing ring (13) is L-shaped, an annular groove is provided at the end of the fixing ring (11), one end of the second sealing ring (13) can be inserted into the annular groove, the second sealing ring (13) is located between the pipe section (5) and the inner steel ring (9), and the inner diameter of the second sealing ring (13) is consistent with the inner diameter of the pipe section (5).

6. A reinforced concrete pipe connection structure according to claim 1, characterized in that: There are a plurality of fixing grooves (501), and each of the fixing grooves (501) is arranged around the outside of the pipe section (5). There are a plurality of fixing plates (701), and each of the fixing plates (701) is arranged around the pipe section (5), so that each of the fixing plates (701) can be bent and inserted into one of the fixing grooves (501).

7. A reinforced concrete pipe connection structure according to claim 1, characterized in that: It also includes a fixed steel ring (6), which is sleeved on the outside of the pipe section (5), and a bolt (14) is provided on the fixed steel ring (6). A fixed block (15) is slidably connected to the inside of the fixed steel ring (6), and a threaded groove is opened on the fixed block (15). One end of the bolt (14) is threadedly connected to the inside of the threaded groove. When the bolt (14) rotates, the fixed block (15) moves, pushing the fixed plate (701), so that the fixed plate (701) is bent and inserted into the fixed groove (501).

8. A reinforced concrete pipe connection structure according to claim 7, characterized in that: One side of the fixing groove (501) and one side of the fixing block (15) are both inclined surfaces so as to clamp the fixing plate (701) in the fixing groove (501).

9. A reinforced concrete pipe connection structure according to claim 1, characterized in that: It also includes a bracket (1), on which a winch (2) is provided. The bracket (1) is used to support one end of the pipe section (5). One end of the pull rope (3) can be inserted into the hook-shaped groove (702), and the other end is connected to the winch (2). A pulley (4) is provided on the bracket (1). The pull rope (3) passes around the outside of the pulley (4). The height of the pulley (4) is consistent with the height of the fixed plate (701), so that the pull rope (3) can pull the fixed plate (701) horizontally.

10. A reinforced concrete pipe connection construction method, characterized in that: The steps include: S1: Dig a trench and compact the bottom of the trench, then construct a sand and gravel cushion layer and lay and compact it; S2: Fix the support (1) at the well position in the groove by means of bolts, and ensure that one side of the support (1) is located at the well wall and remains vertical; S3: excavating a pit on the cushion layer according to the length of the pipe section (5), the pit being located at the connection of the pipe section (5), and hoisting the pipe section (5) into the groove so that one end of the pipe section (5) is in contact with one side of the bracket (1); S4: Put the fixing ring (11) on the outside of the inner steel ring (9), apply talcum powder on the sealing ring (12), and put it on the outside of the stepped groove (1101) of the fixing ring (11), and evenly apply a layer of two-component polysulfide sealant on the inner surface of the fixing groove (501) of the pipe section (5); S5: Install one end of the pull rope (3) in the hook-shaped groove (702) of the fixing plate (701), align the fixing ring (11) with the annular groove (502), and then start the winch (2). The winch (2) reels the pull rope (3), thereby pulling the fixing plate (701) horizontally, so that the outer steel ring (7) approaches the pipe section (5), and the supporting steel ring (8) pushes the fixing ring (11) to be inserted into the annular groove (502), so that the sealing ring (12) is closely attached to the inner wall of the annular groove (502); S5: Remove the pull rope (3), repeat S3-S5, and install the next pipe section (5), so that the two pipe sections (5) are tightly connected; S6: Move the fixing steel ring (6) which is previously sleeved on the outside of the pipe section (5) to the connection between the two pipe sections (5), and make the bolt (14) correspond to the fixing groove (501) of the pipe section (5), then tighten the bolt (14) to insert the fixing block (15) into the fixing groove (501), and bend the fixing plate (701) to buckle into the fixing groove (501); S7: Repeat S3-S6 to connect multiple pipe sections (5).

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