Connecting structure of pressure steel pipe and diversion tunnel

Abstract

The utility model provides a pressure steel pipe and diversion tunnel connecting structure which 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, the baffle ring is poured in the tunnel body, and the baffle ring is connected with the supporting assembly. 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 particularly to a connection structure between a penstock and a water conveyance tunnel. Background Art

[0002] A penstock is a steel pipeline used to convey water fluid, and its interior is in a closed environment. The inner diameter of the penstock is relatively large. In order to effectively utilize and convey water resources, it is necessary to excavate a tunnel according to the environment and connect it to the penstock to ensure the safe and stable conveyance of water to the required places.

[0003] When the existing connection structure between a penstock and a water conveyance tunnel is in use, in order to improve the sealing performance at the connection, a sealing rubber pad is usually used for filling as a seal. Since the water fluid is likely to erode the seal pad, the sealing performance is reduced and the service life is shortened. Moreover, the diameter of the pipe body is usually smaller than that of the tunnel body, and it is easy to deviate during installation and connection. The inner wall of the tunnel causes friction and wear to the pipe body. When different connection depths are carried out, there is a gap between the position where the flange is welded and the tunnel body, which is not convenient for adjusting the seal for further fixation. Summary of the Invention

[0004] To solve the current technical problems, the main object of the present invention is to provide a connection structure between a penstock and a water conveyance tunnel. This connection structure improves the sealing performance between the pipe body and the tunnel body, reduces the erosion of the fluid to the seal pad and the fixing bolts, reduces the friction between the inner wall of the tunnel and the pipe body during connection and installation, improves the connection accuracy, and further improves the fixation between the pipe body and the tunnel body to prevent the screw from loosening and rotating.

[0005] To achieve the above technical features, the object of the present invention is realized as follows: A connection structure between a penstock and a water conveyance tunnel includes a sealing assembly, a support assembly, and a fixing mechanism. The sealing assembly and the support assembly are installed inside the tunnel body, and the fixing mechanism is installed outside the pipe body. The sealing assembly includes a retaining ring, which is cast inside the tunnel body. A sealing groove is provided at the front end of the inner wall of the retaining ring, and a seal pad is filled at the rear end of the sealing groove. Welding grooves are provided at the middle position of the inner wall of the retaining ring and at the rear end of the inner wall of the pipe body. Welding pieces are welded in both of the two welding grooves. A plurality of limiting holes are provided in 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 seal pad are equal to the inner and outer diameters of the sealing groove, and the rear end of the pipe body is located in the sealing groove and is arranged in a matching manner.

[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 inside the retaining ring.

[0008] The support assembly includes a number of support plates, and the number of support plates are installed on the inner wall of the hole body near the front end. A number of groups of positioning holes are drilled through the inner wall of the hole body. A number of support rollers are movably installed on the inner wall of the support plate. Second fixing bolts are connected at positions near the front and rear ends inside the support plate and located within the positioning holes.

[0009] The number of the support plates are arranged in a surrounding manner on the inner wall of the hole body, and the support rollers are rotatably arranged in a movable manner on the inner wall of the support plate.

[0010] The number of each group of positioning holes is two, and the second fixing bolts are threadedly connected within the positioning holes.

[0011] The fixing mechanism includes a flange and a fixing disk. The flange is welded at a position near the rear end on the periphery of the pipe body. A number of reserved holes are drilled through the front end of the hole body. A number of screw rods are movably installed through the flange. The fixing disk is sleeved on the periphery of the number of screw rods, and a fastening nut is sleeved on the periphery of the screw rod and located in front of the fixing disk.

[0012] The number of the screw rods are arranged in a surrounding manner, and the screw rods penetrate through the reserved holes and are threadedly connected.

[0013] The fixing disk is sleeved on the periphery of the number of screw rods and is arranged in a sliding manner, and the fastening nut is sleeved on the periphery of the screw rod and is threadedly connected.

[0014] The present invention has the following beneficial effects:

[0015] 1. By providing a sealing assembly, the rear end of the pipe body is inserted into the sealing groove, squeezing the sealing gasket to make the connection fully contact, improving the sealing between the pipe body and the hole body. Through the connection of the first fixing bolts, pre-fixing is carried out. By welding the welding piece in the welding groove, the sealing between the pipe body and the hole body is further improved, and the erosion of the first fixing bolts and the sealing gasket by the fluid can be reduced;

[0016] 2. By providing a support assembly, when the pipe body is connected inside the hole body, through the rotation of the support rollers, support can be provided for the pipe body, facilitating the sliding and installation of the pipe body, reducing the friction between the inner wall of the hole body and the pipe body. Through the support of the support rollers, the pipe body is installed at the center position in the hole body, improving the connection accuracy and reducing the offset of the pipe body;

[0017] 3. By providing a fixing mechanism, the screw rods pass through the flange and are connected to the reserved holes, further improving the fixing between the pipe body and the hole body. By sliding the fixing disk to the front end of the hole body, the fastening nut slides under the action of the screw thread of the screw rod to fix the fixing disk, improving the sealing inside the hole body, increasing the friction of the screw rods, preventing the screw rods from loosening and rotating, and reducing the erosion of the screw rods in the reserved holes by external rainwater. The problem of errors in the casting position of the retaining ring and the welding position of the flange is solved, and it is applicable to different connection depths. Description of the Drawings

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure of a connecting structure between a penstock and a water conveyance tunnel according to the present invention.

[0020] Figure 2 It is a schematic diagram of the internal structure of a connecting structure between a penstock and a water conveyance tunnel according to the present invention.

[0021] Figure 3 It is a schematic diagram of the internal split structure of a sealing assembly in a connecting structure between a penstock and a water conveyance tunnel according to the present invention.

[0022] Figure 4 It is a schematic diagram of a support assembly in a connecting structure between a penstock and a water conveyance tunnel according to the present invention.

[0023] Figure 5 It is a schematic diagram of a fixing mechanism in a connecting structure between a penstock and a water conveyance tunnel according to the present invention.

[0024] Figure 6 It is a side view of the inside of a connecting structure between a penstock and a water conveyance tunnel according to the present invention.

[0025] In the figure: 1, tunnel body; 2, pipe body; 3, sealing assembly; 4, support 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, support plate; 14, positioning hole; 15, support roller; 16, second fixing bolt; 17, flange; 18, reserved hole; 19, screw; 20, fixing plate; 21, fastening nut. Specific embodiments

[0026] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] Embodiment 1:

[0028] As Figures 1 - 6As shown in the figure, a connecting structure between a penstock and a water diversion tunnel includes a sealing assembly 3, a supporting assembly 4 and a fixing mechanism 5. The sealing assembly 3 and the supporting assembly 4 are installed inside the tunnel body 1, and the fixing mechanism 5 is installed outside the pipe body 2. The sealing assembly 3 includes a retaining ring 6, which is cast inside the tunnel body 1. A sealing groove 7 is provided at the front end of the inner wall of the retaining ring 6, and a sealing gasket 8 is filled at the rear end of the sealing groove 7. Welding grooves 9 are provided at the middle position of the inner wall of the retaining ring 6 and at the rear end of the inner wall of the pipe body 2. Welding pieces 10 are welded in both welding grooves 9. A number of limiting holes 11 are provided in the inner wall of the welding groove 9 in the pipe body 2, and a first fixing bolt 12 is connected through each limiting hole 11. By adopting the above connecting structure, a reliable connection between the pipe body of the penstock and the tunnel body 1 can be achieved, thereby ensuring the sealing effect and improving the installation efficiency.

[0029] 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 pipe body 2 is located in the sealing groove 7 and is arranged in a matching manner. The rear end of the pipe body 2 is clamped into the sealing groove 7 and is sealed by the contact of the sealing gasket 8.

[0030] In this embodiment, the front and rear parts of the welding piece 10 are respectively welded to the two welding grooves 9. The first fixing bolt 12 passes through the retaining ring 6 through the limiting hole 11 and is arranged in a threaded connection. The pipe body 2 and the tunnel body 1 are pre-fixed by the first fixing bolt 12, and the welding piece 10 welds the pipe body 2 and the retaining ring 6 in the welding groove 9, reducing the erosion of the fluid on the first fixing bolt 12 and the sealing gasket 8.

[0031] In this embodiment, the supporting assembly 4 includes a number of support plates 13, which are installed at the front end of the inner wall of the tunnel body 1. A number of groups of positioning holes 14 are provided through the inner wall of the tunnel body 1. A number of support rollers 15 are movably installed on the inner wall of the support plate 13. Second fixing bolts 16 are connected through the front and rear positions inside the support plate 13 and are located in the positioning holes 14. The pipe body 2 is supported by the support rollers 15, so that the pipe body 2 slides into the tunnel body 1 for connection, reducing the friction between the pipe body 2 and the inner wall of the tunnel body 1.

[0032] In this embodiment, a number of support plates 13 are installed around the inner wall of the tunnel body 1, and the support rollers 15 are rotatably installed on the inner wall of the support plate 13. The support rollers 15 provide support and sliding for the pipe body 2, facilitating the connection between the pipe body 2 and the tunnel body 1.

[0033] In this embodiment, the number of each group of positioning holes 14 is two, and the second fixing bolt 16 is arranged in a threaded connection in the positioning hole 14. The support plate 13 is installed around the inner wall of the tunnel body 1 through the second fixing bolt 16, facilitating the installation and disassembly of the support rollers 15.

[0034] In this embodiment, the fixing mechanism 5 includes a flange 17 and a fixing disk 20. The flange 17 is welded to the outer periphery of the pipe 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 disk 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 rod 19 and located in front of the fixing disk 20. The pipe body 2 is fixed to the front end of the hole body 1 through the screw rod 19 and the flange 17 to connect the pipe body 2 and the hole body 1.

[0035] In this embodiment, the plurality of screw rods 19 are arranged in a surrounding manner. The screw rods 19 are threadedly connected inside the reserved holes 18. The screw rods 19 pass through the flange 17 and are connected to the reserved holes 18 to enhance the fixation between the pipe body 2 and the hole body 1.

[0036] In this embodiment, the fixing disk 20 is slidably sleeved on the outer periphery of the plurality of screw rods 19. The fastening nut 21 is threadedly sleeved on the outer periphery of the screw rod 19. The fixing disk 20 is driven by the fastening nut 21 to slide and contact the front part of the hole body 1 to seal the inside of the hole body 1. At the same time, the friction force of the screw rod 19 is enhanced to prevent the screw rod 19 from rotating and loosening.

[0037] It should be noted that the present invention is a connection structure between a penstock and a diversion tunnel. When in use, the retaining ring 6 is cast at a specified position of the hole body 1. When connecting the pipe body 2, since the diameter of the pipe body 2 is smaller than the diameter of the hole body 1, first, the support plate 13 is installed around the inner wall of the hole body 1 and fixed through the connection of the second fixing bolts 16. The pipe body 2 is inserted into the hole body 1. The pipe body 2 is supported by the support rollers 15. Through the rotation of the support rollers 15, the pipe body 2 slides into the hole body 1. The rear end of the pipe body 2 is inserted into the sealing groove 7 and presses the sealing gasket 8 to make full contact for sealing. The pipe body 2 is pre-fixed through the connection of the first fixing bolts 12. Then, the welding pieces 10 are welded in the welding grooves 9 in the pipe body 2 and the welding grooves 9 in the retaining ring 6 to seal and fix between the pipe body 2 and the retaining ring 6, thereby sealing between the pipe body 2 and the hole body 1. When further fixing, the screw rod 19 is connected to the reserved hole 18 through the flange 17 to further fix between 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 disk 20 to contact the front part of the hole body 1 and respectively rotating the fastening nuts 21, sliding is performed through the threaded connection of the screw rods 19 to make the fixing disk 20 fit and fix with the hole body 1, seal the outside of the hole body 1, and further increase the friction force of the screw rod 19 to prevent rotation.

[0038] Embodiment 2:

[0039] A construction method for a connection structure between a penstock and a diversion tunnel includes the following steps:

[0040] Step 1: Pouring of the retaining ring 6:

[0041] Pour the retaining ring 6 at the designated position of the cavity 1 in advance, and set the corresponding sealing assembly 3 on the poured retaining ring 6;

[0042] Step 2: Installation of the support assembly 4:

[0043] Surround and install the support plate 13 with the support rollers 15 on the inner wall of the cavity 1, and fix it through the connection of the second fixing bolts 16;

[0044] Step 3: Installation of the pipe body 2:

[0045] Insert the pipe body 2 into the cavity 1. Support the pipe body 2 through the support rollers 15. By rotating the support rollers 15, the pipe body 2 slides into the cavity 1. Insert the rear end of the pipe body 2 into the sealing groove 7 and squeeze the sealing gasket 8 to make it in full contact for sealing. Pre-fix the pipe body 2 through the connection of the first fixing bolts 12;

[0046] Step 4: Welding of the welding piece 10:

[0047] Weld the welding piece 10 in the welding groove 9 of the pipe body 2 and the retaining ring 6 to weld and seal and fix between the pipe body 2 and the retaining ring 6, and further seal between the pipe body 2 and the cavity 1;

[0048] Step 5: Fixing of the pipe body 2:

[0049] Connect the screw rod 19 and the reserved hole 18 through the flange 17 to further fix between the pipe body 2 and the cavity 1. Due to the error between the pouring position of the retaining ring 6 and the welding position of the flange 17, there is a gap between the front end of the cavity 1 and the flange 17. Slide the fixing disc 20 to the front part of the cavity 1 to make contact, and rotate the fastening nuts 21 respectively. Slide through the threaded connection of the screw rod 19 to make the fixing disc 20 fit and fix with the cavity 1, seal the outside of the cavity 1, and further increase the friction force of the screw rod 19 to prevent rotation, and finally complete the connection of the pipe body 2.

Claims

1. A connecting structure between a penstock and a water diversion tunnel, comprising a sealing assembly (3), a support assembly (4) and a fixing mechanism (5), wherein the sealing assembly (3) and the support assembly (4) are installed inside the tunnel body (1), and the fixing mechanism (5) is installed outside the pipe body (2), and is characterized in that: The sealing component (3) includes a retaining ring (6). The retaining ring (6) is cast inside the cavity (1). A sealing groove (7) is formed at the front end of the inner wall of the retaining ring (6). A sealing gasket (8) is filled at the rear end of the sealing groove (7). Welding grooves (9) are formed at the middle position of the inner wall of the retaining ring (6) and at the rear end of the inner wall of the pipe body (2). Welding pieces (10) are welded in both of the two welding grooves (9). A plurality of limiting holes (11) are formed in the inner wall of the welding groove (9) in the pipe body (2). A first fixing bolt (12) is connected through each of the limiting holes (11).

2. The connection structure between the penstock and the water conveyance tunnel according to claim 1, wherein: 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 pipe body (2) is arranged in the sealing groove (7) in a matching manner.

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

4. A connection structure between a penstock and a water conveyance tunnel according to claim 1, characterized in that: The supporting component (4) includes a plurality of support plates (13). The plurality of support plates (13) are installed at the front end of the inner wall of the cavity (1). A plurality of groups of positioning holes (14) are formed through the inner wall of the cavity (1). A plurality of support rollers (15) are movably installed on the inner wall of the support plate (13). Second fixing bolts (16) are connected through the front and rear ends of the support plate (13) and are located in the positioning holes (14).

5. A connection structure between a penstock and a water conveyance tunnel according to claim 4, characterized in that: The plurality of support plates (13) are arranged in a surrounding manner on the inner wall of the cavity (1). The support rollers (15) are rotatably arranged on the inner wall of the support plate (13).

6. The connection structure between the penstock and the water conveyance tunnel according to claim 4, characterized in that: The number of each group of positioning holes (14) is two. The second fixing bolt (16) is arranged in the positioning hole (14) in a threaded connection.

7. A connection structure between a penstock and a water conveyance tunnel according to claim 1, characterized in that: The fixing mechanism (5) includes a flange (17) and a fixing disk (20). The flange (17) is welded at a position near the rear end of the periphery of the pipe body (2). A plurality of reserved holes (18) are formed through the front end of the cavity (1). A plurality of screw rods (19) are movably installed through the flange (17). The fixing disk (20) is sleeved on the periphery of the plurality of screw rods (19). A fastening nut (21) is sleeved on the periphery of the screw rod (19) and in front of the fixing disk (20).

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

9. A connection structure between a penstock and a water conveyance tunnel according to claim 7, characterized in that: The fixing disk (20) is sleeved on the periphery of the plurality of screw rods (19) and is arranged in a sliding manner. The fastening nut (21) is sleeved on the periphery of the screw rod (19) and is arranged in a threaded connection.

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