Steel penstock and diversion tunnel connecting structure and construction method

Abstract

The invention provides a pressure steel pipe and diversion tunnel connecting structure and a construction method.The pressure steel pipe and diversion tunnel connecting structure comprises a sealing assembly, a supporting assembly and a fixing mechanism, the sealing assembly and the supporting assembly are installed in a tunnel body, the fixing mechanism is installed outside a pipe body, the sealing assembly comprises a baffle ring, and the baffle ring is poured in the tunnel body; a sealing groove is formed in the position, close to the front end, of the inner wall of the baffle ring, the rear end of the sealing groove is filled with a sealing gasket, welding grooves are formed in the position, close to the middle section, of the inner wall of the baffle ring and the position, close to the rear end, of the inner wall of the pipe body, and welding pieces are welded in the two welding grooves. According to the connecting structure for the pressure steel pipe and the diversion tunnel, sealing between the pipe body and the tunnel body is improved, erosion of fluid to the sealing gasket and the fixing bolt is reduced, friction between the inner wall of the tunnel body and the pipe body is reduced during connection and installation, the connecting precision is improved, meanwhile, fixation between the pipe body and the tunnel body is further improved, and the screw rod is prevented from loosening and rotating.

Description

Technical Field

[0001] The present invention relates to the technical field of penstock connection, and in particular to a penstock and water diversion tunnel connection structure and a construction method. Background Art

[0002] Penstock is a steel pipeline used to transport water fluids. Its interior is in a closed environment and the internal diameter of the penstock is relatively large. In order to achieve effective utilization and transportation of water resources, tunnels need to be dug according to the environment and connected to the steel pipe to ensure safe and stable transportation of water to where it is needed.

[0003] When the existing pressure steel pipe and water diversion tunnel connection structure is in use, in order to improve the sealing of the connection, a sealing rubber pad is usually used as a seal. Since the water fluid can easily corrode the sealing pad, the sealing performance is reduced and the service life is shortened. In addition, the diameter of the pipe body is usually smaller than the diameter of the tunnel body, which is easy to deviate during installation and connection. The inner wall of the tunnel body causes friction and wear on the pipe body. When different connection depths are made, there is a gap between the flange welding position and the tunnel body, which makes it inconvenient to adjust the seal for further fixation. Summary of the invention

[0004] In order to solve the current technical problems, the main purpose of the present invention is to provide a connection structure and construction method for a pressure steel pipe and a water diversion tunnel. This connection structure improves the sealing performance between the pipe body and the tunnel body, reduces the erosion of the fluid on the sealing gasket and the fixing bolt, reduces the friction between the inner wall of the tunnel body and the pipe body during connection and installation, improves the connection accuracy, and further improves the fixation of the pipe body and the tunnel body to prevent the screw from loosening and rotating.

[0005] In order to realize the above-mentioned technical features, the object of the present invention is realized as follows: A connection structure of a pressure steel pipe and a water diversion tunnel, comprising a sealing assembly, a supporting assembly and a fixing mechanism, wherein the sealing assembly and the supporting assembly are installed inside the tunnel body, and the fixing mechanism is installed outside the pipe body, the sealing assembly comprises a retaining ring, the retaining ring is cast inside the tunnel body, a sealing groove is provided on the inner wall of the retaining ring near the front end, a sealing gasket is filled at the rear end of the sealing groove, welding grooves are provided on the inner wall of the retaining ring near the middle section and on the inner wall of the pipe body near the rear end, welding sheets are welded in the two welding grooves, a plurality of limiting holes are provided on the inner wall of the welding groove in the pipe body, and a first fixing bolt is connected through each of the limiting holes.

[0006] The inner and outer diameters of the sealing gasket are equal to the inner and outer diameters of the sealing groove, and the rear end of the tube body is located in the sealing groove and is matched with each other.

[0007] The front and rear parts of the welding piece are respectively welded to the two welding grooves, and the first fixing bolt passes through the limiting hole and is threadedly connected to the interior of the retaining ring.

[0008] The support assembly includes a plurality of support plates, which are installed on the inner wall of the hole body near the front end, and a plurality of group positioning holes are opened through the inner wall of the hole body. A plurality of support rollers are movably installed on the inner wall of the support plate, and second fixing bolts are connected to the front and rear ends of the interior of the support plate and located in the positioning holes.

[0009] A plurality of the support plates are arranged on the inner wall of the hole body in a surrounding manner, and the support rollers are arranged on the inner wall of the support plates in a movable and rotatable manner.

[0010] There are two positioning holes in each group, and the second fixing bolts are located in the positioning holes and are threadedly connected.

[0011] The fixing mechanism includes a flange and a fixing plate. The flange is welded to the periphery of the pipe body near the rear end. A plurality of reserved holes are opened at the front end of the through-hole body. A plurality of screws are movably installed inside the through-flange. The fixing plate is sleeved on the periphery of the plurality of screws. A fastening nut is sleeved on the periphery of the screws and located in front of the fixing plate.

[0012] A plurality of screw rods are arranged in a surrounding manner, and the screw rods penetrate the inside of the reserved holes and are arranged in a threaded connection manner.

[0013] The fixing plate is sleeved on the peripheries of a plurality of rod screws in a sliding arrangement, and the fastening nut is sleeved on the peripheries of the screws in a threaded connection arrangement.

[0014] A construction method for a penstock and water diversion tunnel connection structure comprises the following steps: Step 1: Casting of retaining ring: Pre-cast a retaining ring at a designated position of the cave body, and set a corresponding sealing component on the cast retaining ring; Step 2: Installation of support components: The support plate with the support roller is installed around the inner wall of the cave body and fixed by connecting with the second fixing bolt; Step 3: Installation of the pipe body: Insert the tube body into the hole, support the tube body with the support roller, and slide the tube body into the hole by rotating the support roller, insert the rear end of the tube body into the sealing groove and squeeze the sealing gasket to make it fully contact for sealing, and pre-fix the tube body by connecting the first fixing bolt; Step 4: Soldering of the soldering lugs: Weld the welding piece into the welding groove in the pipe body and the retaining ring, so that the pipe body and the retaining ring are welded and sealed and fixed, and then the pipe body and the hole body are sealed; Step 5: Fixing the tube body: The screw is connected to the reserved hole through the flange to further fix the pipe body and the hole body. Due to the error between the casting position of the retaining ring and the welding position of the flange, there is a gap between the front end of the hole body and the flange. The fixing plate is slid to the front of the hole body to contact it, and the tightening nuts are rotated respectively. The screw is slid through the threaded connection to make the fixing plate fit and fix the hole body, and the outside of the hole body is sealed, thereby increasing the friction of the screw to allow it to rotate, and finally completing the connection of the pipe body.

[0015] The present invention has the following beneficial effects: 1. By setting a sealing assembly, inserting the rear end of the tube into the sealing groove, squeezing the sealing gasket to make the connection fully contact, improving the sealing between the tube body and the hole body, and pre-fixing through the connection of the first fixing bolt, and further improving the sealing of the tube body and the hole body by welding the welding piece in the welding groove, the erosion of the first fixing bolt and the sealing gasket by the fluid can be reduced; 2. By setting the support assembly, when the pipe body is connected inside the hole, the support roller can provide support for the pipe body through rotation, which is convenient for sliding and installation of the pipe body, and reduces the friction between the inner wall of the hole and the pipe body. With the support of the support roller, the pipe body is installed in the center of the hole, which improves the connection accuracy and reduces the deviation of the pipe body. 3. By setting up a fixing mechanism, the screw passes through the flange and is connected to the reserved hole, which further improves the fixation between the pipe body and the hole body. By sliding the fixing plate to the front end of the hole body, the fastening nut slides under the action of the screw thread to fix the fixing plate, thereby improving the sealing inside the hole body, increasing the friction of the screw, preventing the screw from loosening and rotating, and reducing the erosion of the screw in the reserved hole by external rainwater. The error problem of the casting position of the retaining ring and the welding position of the flange is solved, which is suitable for different connection depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 The present invention is a schematic diagram of the overall structure of a penstock and water diversion tunnel connection structure.

[0018] Figure 2 The figure is a schematic diagram of the internal structure of a connection structure between a pressure steel pipe and a water diversion tunnel according to the present invention.

[0019] Figure 3 The present invention is a schematic diagram of the internal disassembly structure of a sealing component in a connection structure between a pressure steel pipe and a water diversion tunnel.

[0020] Figure 4 The present invention is a schematic structural diagram of a support assembly in a penstock and water diversion tunnel connection structure.

[0021] Figure 5The present invention is a schematic structural diagram of a fixing mechanism in a connecting structure between a pressure steel pipe and a water diversion tunnel.

[0022] Figure 6 The figure is an internal side view of a connection structure between a pressure steel pipe and a water diversion tunnel according to the present invention.

[0023] In the figure: 1. hole body; 2. tube body; 3. sealing assembly; 4. supporting assembly; 5. fixing mechanism; 6. retaining ring; 7. sealing groove; 8. sealing gasket; 9. welding groove; 10. welding piece; 11. limiting hole; 12. first fixing bolt; 13. supporting plate; 14. positioning hole; 15. supporting roller; 16. second fixing bolt; 17. flange; 18. reserved hole; 19. screw; 20. fixing plate; 21. tightening nut. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0025] Embodiment 1: like Figure 1-Figure 6 As shown, a penstock and water diversion tunnel connection structure includes a sealing component 3, a supporting component 4 and a fixing mechanism 5. The sealing component 3 and the supporting component 4 are installed inside the cave body 1, and the fixing mechanism 5 is installed outside the pipe body 2. The sealing component 3 includes a retaining ring 6, which is cast inside the cave body 1. The inner wall of the retaining ring 6 is provided with a sealing groove 7 near the front end, and the rear end of the sealing groove 7 is filled with a sealing gasket 8. The inner wall of the retaining ring 6 near the middle section and the inner wall of the pipe body 2 near the rear end are provided with welding grooves 9, and welding pieces 10 are welded in the two welding grooves 9. The inner wall of the welding groove 9 in the pipe body 2 is provided with a plurality of limiting holes 11, and a first fixing bolt 12 is connected through each limiting hole 11. By adopting the above-mentioned connection structure, a reliable connection between the pipe body of the penstock and the cave body 1 can be achieved, thereby ensuring the sealing effect and improving the installation efficiency.

[0026] In this embodiment, the inner and outer diameters of the sealing gasket 8 are equal to the inner and outer diameters of the sealing groove 7. The rear end of the tube body 2 is located in the sealing groove 7 and is matched with each other. The rear end of the tube body 2 is inserted into the sealing groove 7 and is sealed by the contact of the sealing gasket 8.

[0027] In this embodiment, the front and rear parts of the welding piece 10 are respectively welded to the two welding grooves 9, and the first fixing bolt 12 passes through the limiting hole 11 and is threadedly connected to the interior of the retaining ring 6. The first fixing bolt 12 pre-fixes the tube body 2 and the hole body 1, and the welding piece 10 welds the tube body 2 and the retaining ring 6 in the welding groove 9 to reduce the erosion of the fluid on the first fixing bolt 12 and the sealing gasket 8.

[0028] In this embodiment, the support assembly 4 includes a plurality of support plates 13, which are installed on the inner wall of the hole body 1 near the front end, and a plurality of group positioning holes 14 are opened through the inner wall of the hole body 1. A plurality of support rollers 15 are movably installed on the inner wall of the support plate 13, and second fixing bolts 16 are connected to the front and rear ends of the interior of the support plate 13 and located in the positioning holes 14. The tube body 2 is supported by the support rollers 15, so that the tube body 2 slides into the hole body 1 for connection, thereby reducing the friction between the tube body 2 and the inner wall of the hole body 1.

[0029] In this embodiment, a plurality of support plates 13 are arranged on the inner wall of the hole body 1 in a surrounding installation, and a support roller 15 is arranged on the inner wall of the support plate 13 in a movable and rotatable manner. The support roller 15 provides support and sliding for the tube body 2, thereby facilitating the connection between the tube body 2 and the hole body 1.

[0030] In this embodiment, each group of positioning holes 14 has two, and the second fixing bolts 16 are threadedly connected in the positioning holes 14 . The support plate 13 is installed around the inner wall of the hole 1 through the second fixing bolts 16 , which facilitates the installation and removal of the support rollers 15 .

[0031] In this embodiment, the fixing mechanism 5 includes a flange 17 and a fixing plate 20. The flange 17 is welded to the periphery of the tube body 2 near the rear end. A plurality of reserved holes 18 are provided at the front end of the through-hole body 1. A plurality of screws 19 are movably installed inside the through-flange 17. The fixing plate 20 is sleeved on the periphery of the plurality of screws 19. A fastening nut 21 is sleeved on the periphery of the screws 19 and located in front of the fixing plate 20. The tube body 2 is fixed to the front end of the hole body 1 by the screws 19 and the flange 17, so as to connect the tube body 2 with the hole body 1.

[0032] In this embodiment, a plurality of screw rods 19 are installed in a surrounding manner, and the screw rods 19 are threadedly connected to the inside of the reserved hole 18 . The screw rods 19 pass through the flange 17 and are connected to the reserved hole 18 , thereby enhancing the fixation between the tube body 2 and the hole body 1 .

[0033] In this embodiment, the fixed plate 20 is sleeved on the periphery of a plurality of rod screws 19 in a sliding arrangement, and the fastening nut 21 is sleeved on the periphery of the screw 19 in a threaded connection arrangement. The fastening nut 21 drives the fixed plate 20 to slide and contact the front of the hole body 1, thereby sealing the interior of the hole body 1 and enhancing the friction of the screw 19 to prevent the screw 19 from rotating and loosening.

[0034] It should be noted that the present invention is a connection structure between a pressure steel pipe and a water diversion tunnel. When in use, the retaining ring 6 is cast at a specified position of the cave body 1. When connecting the pipe body 2, since the diameter of the pipe body 2 needs to be smaller than the diameter of the cave body 1, the support plate 13 is first installed around the inner wall of the cave body 1, and fixed by the connection of the second fixing bolt 16. The pipe body 2 is inserted into the cave body 1, and the pipe body 2 is supported by the support roller 15. The support roller 15 is rotated to make the pipe body 2 slide into the cave body 1, and the rear end of the pipe body 2 is inserted into the sealing groove 7 and the sealing gasket 8 is squeezed to make it fully contact for sealing. The pipe body 2 is pre-fixed by the connection of the first fixing bolt 12, and then the welding piece 10 is welded in the pipe body 2. The welding groove 9 and the welding groove 9 in the retaining ring 6 are welded, sealed and fixed between the tube body 2 and the retaining ring 6, so that the tube body 2 and the hole body 1 are sealed. When further fixed, the screw 19 is connected to the reserved hole 18 through the flange 17 to further fix the tube body 2 and the hole body 1. Since there is an error between the casting position of the retaining ring 6 and the welding position of the flange 17, there is a gap between the front end of the hole body 1 and the flange 17. By sliding the fixing plate 20 to the front of the hole body 1 to contact it, the nut 21 is rotated and tightened respectively, and the screw 19 is threaded and slid to make the fixing plate 20 fit and fix with the hole body 1, and the outside of the hole body 1 is sealed, thereby increasing the friction of the screw 19 to prevent rotation.

[0035] Embodiment 2: A construction method for a penstock and water diversion tunnel connection structure comprises the following steps: Step 1: Casting of retaining ring 6: Pre-cast a retaining ring 6 at a designated position of the cave body 1, and arrange a corresponding sealing component 3 on the cast retaining ring 6; Step 2: Installation of support assembly 4: The support plate 13 with the support roller 15 is installed around the inner wall of the cave body 1 and fixed by connecting with the second fixing bolt 16; Step 3: Installation of pipe body 2: Insert the tube body 2 into the hole body 1, support the tube body 2 through the support roller 15, and slide the tube body 2 into the hole body 1 through the rotation of the support roller 15, so that the rear end of the tube body 2 is inserted into the sealing groove 7 and the sealing gasket 8 is squeezed to make it fully contact for sealing, and the tube body 2 is pre-fixed by connecting the first fixing bolt 12; Step 4: Soldering of soldering lug 10: Weld the welding piece 10 into the welding groove 9 in the tube body 2 and the retaining ring 6, so that the tube body 2 and the retaining ring 6 are welded and sealed and fixed, and then the tube body 2 and the hole body 1 are sealed; Step 5: Fixing of tube body 2: The screw 19 is connected to the reserved hole 18 through the flange 17 to further fix the pipe body 2 and the hole body 1. Since there is an error between the casting position of the retaining ring 6 and the welding position of the flange 17, there is a gap between the front end of the hole body 1 and the flange 17. The fixing plate 20 is slid to the front of the hole body 1 to contact it, and the nuts 21 are rotated and tightened respectively. The fixing plate 20 and the hole body 1 are slid through the threaded connection of the screw 19 to make them fit and fix, and the outside of the hole body 1 is sealed, thereby increasing the friction of the screw 19 to allow it to rotate, and finally completing the connection of the pipe body 2.

Claims

1. A penstock and water diversion tunnel connection structure, comprising a sealing assembly (3), a supporting assembly (4) and a fixing mechanism (5), wherein the sealing assembly (3) and the supporting assembly (4) are installed inside a tunnel body (1), and the fixing mechanism (5) is installed outside a pipe body (2), characterized in that: The sealing assembly (3) comprises a retaining ring (6), the retaining ring (6) is cast inside the hole (1), a sealing groove (7) is provided on the inner wall of the retaining ring (6) near the front end, a sealing gasket (8) is filled on the rear end of the sealing groove (7), welding grooves (9) are provided on the inner wall of the retaining ring (6) near the middle section and on the inner wall of the tube body (2) near the rear end, welding sheets (10) are welded in the two welding grooves (9), a plurality of limiting holes (11) are provided on the inner wall of the welding groove (9) in the tube body (2), and a first fixing bolt (12) is connected to each of the limiting holes (11).

2. According to claim 1, a penstock and water diversion tunnel connection structure, characterized in that: The inner and outer diameters of the sealing gasket (8) are equal to the inner and outer diameters of the sealing groove (7), and the rear end of the tube body (2) is located in the sealing groove (7) and is arranged to match each other.

3. The penstock and water diversion tunnel connection structure according to claim 1, characterized in that: The front and rear parts of the welding sheet (10) are respectively welded to the two welding grooves (9), and the first fixing bolt (12) passes through the inner part of the retaining ring (6) through the limiting hole (11) and is arranged in a threaded connection.

4. The penstock and water diversion tunnel connection structure according to claim 1, characterized in that: The support assembly (4) comprises a plurality of support plates (13), the plurality of support plates (13) being mounted on the inner wall of the hole body (1) near the front end, a plurality of group positioning holes (14) being provided through the inner wall of the hole body (1), a plurality of support rollers (15) being movably mounted on the inner wall of the support plate (13), and second fixing bolts (16) being connected to the front and rear ends of the interior of the support plate (13) and located in the positioning holes (14).

5. The penstock and water diversion tunnel connection structure according to claim 4, characterized in that: A plurality of the support plates (13) are disposed on the inner wall of the hole body (1) in a surrounding manner, and the support rollers (15) are disposed on the inner wall of the support plates (13) in a movable and rotatable manner.

6. The penstock and water diversion tunnel connection structure according to claim 4, characterized in that: The number of the positioning holes (14) in each group is two, and the second fixing bolts (16) are located in the positioning holes (14) and are threadedly connected.

7. The penstock and diversion tunnel connection structure according to claim 1, characterized in that: The fixing mechanism (5) comprises a flange (17) and a fixing plate (20). The flange (17) is welded to the outer periphery of the tube body (2) near the rear end. A plurality of reserved holes (18) are provided at the front end of the through hole body (1). A plurality of screw rods (19) are movably installed inside the through flange (17). The fixing plate (20) is sleeved on the outer periphery of the plurality of screw rods (19). A fastening nut (21) is sleeved on the outer periphery of the screw rods (19) and located in front of the fixing plate (20).

8. The penstock and diversion tunnel connection structure according to claim 7, characterized in that: A plurality of screw rods (19) are arranged in a surrounding manner, and the screw rods (19) penetrate the interior of the reserved holes (18) and are arranged in a threaded connection.

9. The penstock and diversion tunnel connection structure according to claim 7, characterized in that: The fixing plate (20) is sleeved on the periphery of a plurality of rod screws (19) in a sliding arrangement, and the fastening nut (21) is sleeved on the periphery of the screws (19) in a threaded connection arrangement.

10. The construction method of the penstock and water diversion tunnel connection structure according to any one of claims 4 to 9, characterized in that: The following steps are involved: Step 1: Casting of retaining ring (6): Pre-casting a retaining ring (6) at a designated position of the cave body (1), and arranging a corresponding sealing component (3) on the cast retaining ring (6); Step 2: Installation of support assembly (4): The support plate (13) with the support roller (15) is installed around the inner wall of the hole body (1) and fixed by connecting with the second fixing bolt (16); Step 3: Installation of the tube body (2): Insert the tube body (2) into the hole body (1), support the tube body (2) via the support roller (15), and make the tube body (2) slide into the hole body (1) by the rotation of the support roller (15), so that the rear end of the tube body (2) is inserted into the sealing groove (7) and the sealing gasket (8) is squeezed to make it fully contact and seal, and the tube body (2) is pre-fixed by connecting with the first fixing bolt (12); Step 4: Soldering of soldering lugs (10): Welding the welding sheet (10) into the welding groove (9) in the tube body (2) and the retaining ring (6) to seal and fix the tube body (2) and the retaining ring (6) through welding, thereby sealing the tube body (2) and the cavity (1); Step 5: Fixing the tube body (2): The screw rod (19) is connected to the reserved hole (18) through the flange (17) to further fix the pipe body (2) and the hole body (1). Since there is an error between the casting position of the retaining ring (6) and the welding position of the flange (17), there is a gap between the front end of the hole body (1) and the flange (17). By sliding the fixing plate (20) to the front of the hole body (1) to contact it, the nut (21) is rotated and tightened respectively, and the fixing plate (20) and the hole body (1) are slid through the threaded connection of the screw rod (19), so that the fixing plate (20) and the hole body (1) are attached and fixed, the outside of the hole body (1) is sealed, and the friction force of the screw rod (19) is increased to allow the screw rod (19) to rotate, and finally the connection of the pipe body (2) is completed.

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