Split pipe head for replacing short pipe

Abstract

The utility model relates to the technical field of municipal construction, in particular to a short pipe replacement split pipe head which comprises a split pipe head body, a spalling mechanism used for spalling an old pipeline is arranged on the outer side of the split pipe head body, a connecting pipe is fixed to the right side of the split pipe head body, and a replacement pipe is placed in the connecting pipe; a fixing mechanism used for fixing a new pipeline is arranged on the connecting pipe, the spalling mechanism comprises a base, a limiting piece, a plurality of spalling pieces and a plurality of dismounting pieces, and the base is fixed to the outer side of the split pipe head body. According to the short pipe replacement crack pipe head, through cooperation of the base, the connecting block can slide on the base, so that the spalling cutters can be arranged on the base in order, through cooperation of the limiting block, the connecting block can be prevented from being separated from the base, through cooperation of the pushing block, the connecting rod can be driven to move, and therefore the clamping block is driven to move; and a clamping block enters a second mounting groove, so that a connecting block is conveniently taken out from a limiting opening, and the spalling knife is conveniently replaced and mounted.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal construction, in particular to a short pipe replacement cracked pipe head. Background Art

[0002] Short pipe replacement trenchless repair technology is an emerging technology for pipeline repair. It connects many short pipes together to form an integral pipeline. It uses the pipe bursting construction method to replace the drainage pipe between two wells as a whole by utilizing the existing well chamber without digging a working pit, excavating the ground, or destroying the well chamber.

[0003] For example, China Utility Model Patent Publication No. (CN219692622U) discloses a short-pipe replacement crack head for a municipal pipeline, which includes a crack head body and an expansion knife component installed on the outer cone surface of the crack head body, the expansion knife component includes at least two expansion knife units spliced ​​to each other, and adjacent expansion knife units are connected by a splicing structure, the splicing structure includes a plug-in slot opened in one of the expansion knife units, a plug-in block arranged in the other expansion knife unit and plugged with the plug-in slot, and a locking screw for locking the two expansion knife units. This utility model solves the problem that the rear end of the expansion knife is used frequently, and when the rear end of the expansion knife is damaged, the front end of the expansion knife is still in good condition. When replacing the expansion knife, it is often necessary to disassemble the entire expansion knife. However, when disassembling a certain expansion knife that needs to be replaced in this patent, a screwdriver is required to complete the disassembly and installation of the expansion knife, which makes the replacement efficiency of the expansion knife low and affects practicality. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a short tube replacement cracked tube head, which has the advantages of quickly replacing and installing a damaged expansion knife, etc., and solves the problem that when disassembling a certain expansion knife that needs to be replaced, a screwdriver is required to complete the disassembly and installation of the expansion knife, which makes the replacement efficiency of the expansion knife low and affects the practicality.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a short pipe replacement cracking head, comprising a cracking head body, an expansion mechanism for cracking the old pipe is arranged on the outside of the cracking head body, a connecting pipe is fixed on the right side of the cracking head body, a replacement pipe is placed inside the connecting pipe, and a fixing mechanism for fixing the new pipe is arranged on the connecting pipe;

[0006] The bursting mechanism includes a base, a limiting piece, multiple bursting pieces, and multiple disassembling pieces. The base is fixed to the outer side of the pipe splitting head body. The limiting piece is arranged on the base to limit the cutter head installed on the base. Multiple bursting pieces are arranged on the base to facilitate cutting and bursting of old pipes. Multiple disassembling pieces are respectively arranged on multiple bursting pieces, and their positions correspond one to one, so as to facilitate the replacement of damaged cutter heads.

[0007] The beneficial effect of adopting the above further solution is that when the bursting component is damaged, it can be quickly replaced, thereby improving work efficiency.

[0008] Furthermore, the limiting component includes two limiting blocks, and the two limiting blocks are respectively fixed to the left and right sides of the base, and a limiting opening is provided on the upper surface of the base.

[0009] The beneficial effect of adopting the above further solution is: preventing the cutter head from falling off the base and affecting the expansion and cracking effect.

[0010] Furthermore, the base is in the shape of a rectangular parallelepiped with a hollow interior, the limiting opening is communicated with the cavity inside the base, and the width of the limiting opening is smaller than the width of the cavity.

[0011] The beneficial effect of adopting the above further solution is that the cutter head can have a limiting function on the base.

[0012] Furthermore, the bursting component includes a connecting plate, a mounting block, and a bursting knife. The connecting plate is arranged on the inner side of the limiting opening, and the lower surface passes through and extends into the cavity inside the base. The mounting block is fixed to the upper surface of the connecting plate, and the bursting knife is fixed to the upper surface of the mounting block.

[0013] The beneficial effect of adopting the above further solution is to improve the efficiency of cutting and bursting old pipes.

[0014] Furthermore, the width of the connecting plate matches the width of the limiting opening, and the width of the mounting block is greater than the width of the limiting opening.

[0015] The beneficial effect of adopting the above further solution is: it is convenient for the connection plate to move inside the limiting opening, and at the same time prevents the installation block from falling into the cavity from the limiting opening.

[0016] Furthermore, the disassembly part includes two springs, two push blocks, two connecting rods, and two clamping blocks. A first mounting groove is provided on the left and right sides of the mounting block. One end of the two springs is respectively fixed to the inner wall on the side opposite to the two first mounting grooves, and the other ends of the two springs are respectively fixed to the two push blocks. A second mounting groove is provided on the left and right sides of the connecting plate. One end of the two connecting rods is respectively fixed to the two push blocks, and the other ends of the two connecting rods respectively penetrate and extend to the interior of the two second mounting grooves and are fixed to the clamping blocks.

[0017] The beneficial effect of adopting the above further solution is: avoiding the need to replace the entire blade body and reducing maintenance costs.

[0018] Furthermore, the fixing mechanism includes a first connecting ring, a second connecting ring, a connecting piece, and a fixing piece. The first connecting ring and the second connecting ring are both arranged on the outside of the connecting tube and are symmetrically distributed front and back with respect to the central axis of the connecting tube. The first connecting ring and the second connecting ring are hingedly connected by a hinge shaft, and the connecting piece and the fixing piece are both arranged on the first connecting ring and the second connecting ring.

[0019] The beneficial effect of adopting the above further solution is that the replacement tube can maintain stability during the mobile replacement process to avoid falling off.

[0020] Furthermore, the connecting member includes a first connecting block, a second connecting block, a threaded rod, and a fixing nut. The first connecting block is fixed to the outer side of the first connecting ring, the second connecting block is fixed to the outer side of the second connecting ring, a first connecting groove is provided on the upper surface of the first connecting block, the threaded rod is hinged to the inner side of the first connecting groove through a hinge shaft, a second connecting groove is provided on the upper surface of the second connecting block, and the fixing nut is threadedly connected to the outer side of the threaded rod.

[0021] The beneficial effect of adopting the above further solution is that it is convenient to install and connect the first connecting ring and the second connecting ring on the outside of the connecting pipe.

[0022] Furthermore, the fixing member includes multiple support plates, multiple fixing bolts, and multiple rubber pads. The multiple support plates are fixed to the right sides of the first connecting ring and the second connecting ring, and are symmetrically distributed around the central axis of the connecting tube. The multiple fixing bolts are respectively connected to the inner threads of the multiple support plates, and the multiple rubber pads are respectively fixed to the multiple fixing bolts near one end of the replacement tube.

[0023] The beneficial effect of adopting the above further solution is that the position of the replacement tube can be fixed to prevent the replacement tube from falling off.

[0024] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0025] 1. The short tube replaces the pipe cracking head. Through the cooperation of the base, the connecting block can slide on the base, so that the bursting knife can be neatly arranged on the base. Through the cooperation of the limit block, the connecting block can be prevented from detaching from the base. Through the cooperation of the push block, the connecting rod can be driven to move, thereby driving the clamping block to move, so that the clamping block enters the second installation groove, so that the connecting block can be taken out from the limit opening, which is convenient for replacing and installing the bursting knife.

[0026] 2. The short tube replaces the cracked tube head. Through the cooperation of the first connecting ring and the second connecting ring, the support plate and the connecting tube can be connected and installed, so that the support plate is located on the outside of the connecting tube to fix the replacement tube. Through the cooperation of the threaded rod and the fixing nut, the first connecting ring and the second connecting ring can be fixed to prevent loosening or falling on the outside of the connecting tube. Through the cooperation of the fixing bolts, the new replacement tube can be fixed so that the cracked tube head can drive the replacement tube to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the expansion and cracking mechanism of the utility model;

[0029] Figure 3 It is a partial schematic diagram of the expansion and cracking mechanism of the utility model;

[0030] Figure 4 This is a side view of the fixing mechanism of the utility model;

[0031] Figure 5 It is a schematic diagram of the fixing part of the utility model.

[0032] In the figure: 1. pipe cracking head body; 2. expansion mechanism; 21. base; 22. limit member; 221. limit block; 222. limit port; 23. expansion member; 231. connecting plate; 232. mounting block; 233. expansion knife; 24. disassembly member; 241. spring; 242. push block; 243. connecting rod; 244. clamping block; 245. first mounting groove; 246. second mounting groove; 3. connecting pipe; 4. replacement pipe; 5. fixing mechanism; 51. first connecting ring; 52. second connecting ring; 53. connecting member; 531. first connecting block; 532. second connecting block; 533. threaded rod; 534. fixing nut; 535. first connecting groove; 536. second connecting groove; 54. fixing member; 541. support plate; 542. fixing bolt; 543. rubber pad. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figure 1In this embodiment, a short pipe replacement cracking head comprises a cracking head body 1. An expansion mechanism 2 for expanding and cracking the old pipe is arranged on the outer side of the cracking head body 1. When the expansion component is damaged, it can be quickly replaced to improve work efficiency. A connecting pipe 3 is fixed on the right side of the cracking head body 1. A replacement pipe 4 is placed inside the connecting pipe 3 to replace the old pipe. A fixing mechanism 5 for fixing the new pipe is arranged on the connecting pipe 3, so that the replacement pipe 4 can maintain stability during the moving replacement process to avoid falling off.

[0035] See also Figure 2-3 In order to be able to quickly replace it when the bursting component is damaged and improve work efficiency, the bursting mechanism 2 in this embodiment includes a base 21, a limiter 22, multiple bursting components 23, and multiple disassembly components 24. The base 21 is fixed to the outer side of the pipe splitting head body 1. The limiter 22 is arranged on the base 21, which is used to limit the cutter head installed on the base 21 to prevent the cutter head from falling from the base 21 and affecting the bursting effect. Multiple bursting components 23 are all arranged on the base 21, which are used to facilitate the cutting and bursting of old pipes and improve the efficiency of cutting and bursting old pipes. Multiple disassembly components 24 are respectively arranged on multiple bursting components 23, and the positions correspond one to one, which is used to facilitate the replacement of damaged cutter heads, avoid replacing the entire blade body, and reduce maintenance costs.

[0036] In this embodiment, the limiter 22 includes two limit blocks 221, which are respectively fixed to the left and right sides of the base 21 to prevent the cutter head from falling from the two ends of the base 21. The upper surface of the base 21 is provided with a limit opening 222. The bursting member 23 includes a connecting plate 231, a mounting block 232, and a bursting knife 233. The connecting plate 231 is arranged on the inner side of the limit opening 222, and the lower surface passes through and extends into the cavity inside the base 21. The connecting plate 231 is arranged at the limit opening. 222, so as to adjust the position of the bursting knife 233, the mounting block 232 is fixed to the upper surface of the connecting plate 231, the bursting knife 233 is fixed to the upper surface of the mounting block 232, and the bursting knife 233 can be moved in the old pipe by pulling the pipe splitting head body 1 by the hydraulic winch to cut and split the old pipe. The disassembly part 24 includes two springs 241, two push blocks 242, two connecting rods 243, and two clamping blocks 244. The left and right sides of the mounting block 232 are provided with The first mounting groove 245, one end of the two springs 241 are respectively fixed to the inner wall of the side opposite to the two first mounting grooves 245, and the other ends of the two springs 241 are respectively fixed to the two push blocks 242. Second mounting grooves 246 are opened on the left and right sides of the connecting plate 231, and one end of the two connecting rods 243 are respectively fixed to the two push blocks 242. Press the push blocks 242, and the push blocks 242 enter the first mounting groove 245, so that the push blocks 242 squeeze the springs 241 while driving the connecting rod 243 to move. The other ends of the two connecting rods 243 respectively penetrate and extend into the interior of the two second mounting grooves 246, and are fixed to the clamping block 244. The connecting rod 243 drives the clamping block 244 to move, so that the clamping block 244 enters the second mounting groove 246. At this time, the connecting plate 231 loses its limiting effect and can be taken out from the limiting opening 222. Then the newly replaced bursting knife 233 is inserted into the limiting opening 222, thereby quickly completing the replacement of the bursting knife 233.

[0037] It should be noted that the base 21 is shaped like a rectangular parallelepiped with a hollow interior, the limiting opening 222 is connected to the cavity inside the base 21, and the width of the limiting opening 222 is smaller than the width of the cavity, so that the cutter head can have a limiting function on the base 21, the width of the connecting plate 231 is adapted to the width of the limiting opening 222, and the width of the mounting block 232 is larger than the width of the limiting opening 222, which facilitates the connecting plate 231 to move inside the limiting opening 222 and prevents the mounting block 232 from falling into the cavity from the limiting opening 222.

[0038] See also Figure 4-5In order to allow the replacement tube 4 to maintain stability during the movement and replacement process and avoid falling off, the fixing mechanism 5 in this embodiment includes a first connecting ring 51, a second connecting ring 52, a connecting piece 53, and a fixing piece 54. The first connecting ring 51 and the second connecting ring 52 are both arranged on the outside of the connecting tube 3, and are symmetrically distributed front and back with the central axis of the connecting tube 3. The first connecting ring 51 and the second connecting ring 52 are hinged by a hinge shaft. The first connecting ring 51 and the second connecting ring 52 have the same shape, and the inner diameters are adapted to the outer diameter of the connecting tube 3. The connecting piece 53 and the fixing piece 54 are both arranged on the first connecting ring 51 and the second connecting ring 52.

[0039] In this embodiment, the connecting member 53 includes a first connecting block 531, a second connecting block 532, a threaded rod 533, and a fixing nut 534. The first connecting block 531 is fixed to the outer side of the first connecting ring 51, and the second connecting block 532 is fixed to the outer side of the second connecting ring 52. The first connecting ring 51 and the second connecting ring 52 are closed to make the first connecting block 531 and the second connecting block 532 contact each other. A first connecting groove 535 is provided on the upper surface of the first connecting block 531. The threaded rod 533 is hinged to the inner side of the first connecting groove 535 through a hinge shaft. A second connecting groove 536 is provided on the upper surface of the second connecting block 532. The fixing nut 534 is threadedly connected to the outer side of the threaded rod 533. The threaded rod 533 is tilted into the second connecting groove 536, and the fixing nut 534 is rotated to allow the fixing nut 534 to tighten the first connecting block 531 and the second connecting block 532. Thereby, the first connecting ring 51 and the second connecting ring 52 are installed. The fixing part 54 includes multiple support plates 541, multiple fixing bolts 542, and multiple rubber pads 543. The multiple support plates 541 are fixed to the right sides of the first connecting ring 51 and the second connecting ring 52, and are symmetrically distributed around the central axis of the connecting tube 3. The multiple fixing bolts 542 are respectively connected to the inner threads of the multiple support plates 541. Each fixing bolt 542 is rotated in turn to rotate and move the fixing bolt 542 on the support plate 541 until each fixing bolt 542 is in contact with the replacement tube 4 to fix the position of the replacement tube 4. The multiple rubber pads 543 are respectively fixed to one end of the multiple fixing bolts 542 close to the replacement tube 4. Through the cooperation of the rubber pad 543, it is possible to avoid the fixing bolt 542 from wearing the surface of the replacement tube 4 when fixing the replacement tube 4, thereby affecting the service life of the replacement tube 4.

[0040] The working principle of the above embodiment is:

[0041] (1) Before the pipe splitting head body 1 starts working, it is necessary to connect the replacement pipe 4 used to replace the old pipe with the pipe splitting head body 1. First, insert one end of the replacement pipe 4 into the interior of the connecting pipe 3. Then, put the first connecting ring 51 and the second connecting ring 52 on the outside of the connecting pipe 3, and close the first connecting ring 51 and the second connecting ring 52 so that the first connecting block 531 and the second connecting block 532 are in contact. Then, pour the threaded rod 533 into the second connecting groove 536, and then turn the fixing nut 534 to allow the fixing nut 534 to tighten the first connecting block 531 and the second connecting block 532, so that the first connecting ring 51 and the second connecting ring 52 are installed. At this time, turn each fixing bolt 542 in turn to make the fixing bolt 542 rotate and move on the support plate 541 until each fixing bolt 542 is in contact with the replacement pipe 4, so that the position of the replacement pipe 4 is fixed.

[0042] (2) Through the cooperation of the rubber pad 543, it is possible to prevent the fixing bolt 542 from wearing the surface of the replacement pipe 4 when fixing the replacement pipe 4, thereby affecting the service life of the replacement pipe 4. Then, the hydraulic winch is used to pull the pipe cracking head body 1, so that the expansion knife 233 can be moved in the old pipe to cut and crack the old pipe. After the expansion work is completed, some expansion knives 233 will be damaged after long-term use and need to be replaced in time. The push block 242 is pressed and the push block 242 enters the first installation groove 245, so that the push block 242 squeezes the spring 241 while driving the connecting rod 243 to move. The connecting rod 243 drives the clamping block 244 to move, so that the clamping block 244 enters the second installation groove 246. At this time, the connecting plate 231 loses its limiting effect and can be taken out from the limiting opening 222. Then the newly replaced expansion knife 233 is inserted into the limiting opening 222, thereby quickly completing the replacement of the expansion knife 233.

Claims

1. A short pipe replacement splitting head, comprising a splitting head body (1), characterized in that: An expansion mechanism (2) for expanding and bursting an old pipe is arranged on the outside of the pipe-splitting head body (1); a connecting pipe (3) is fixed to the right side of the pipe-splitting head body (1); a replacement pipe (4) is placed inside the connecting pipe (3); and a fixing mechanism (5) for fixing a new pipe is arranged on the connecting pipe (3); The bursting mechanism (2) comprises a base (21), a limiting member (22), a plurality of bursting members (23), and a plurality of disassembling members (24); the base (21) is fixed to the outer side of the pipe splitting head body (1); the limiting member (22) is arranged on the base (21) and is used to limit the position of a cutter head mounted on the base (21); the plurality of bursting members (23) are arranged on the base (21) and are used to facilitate cutting and bursting of an old pipe; the plurality of disassembling members (24) are respectively arranged on the plurality of bursting members (23) and are positioned one-to-one to facilitate replacement of a damaged cutter head.

2. A short pipe replacement cracking head according to claim 1, characterized in that: The limiting member (22) comprises two limiting blocks (221), the two limiting blocks (221) being fixed to the left and right sides of the base (21) respectively, and a limiting opening (222) is provided on the upper surface of the base (21).

3. A short pipe replacement cracking head according to claim 2, characterized in that: The base (21) is in the shape of a rectangular parallelepiped with a hollow interior, the limiting opening (222) is in communication with the cavity inside the base (21), and the width of the limiting opening (222) is smaller than the width of the cavity.

4. A short pipe replacement cracking head according to claim 3, characterized in that: The bursting member (23) comprises a connecting plate (231), a mounting block (232), and a bursting knife (233); the connecting plate (231) is arranged on the inner side of the limiting opening (222), and the lower surface thereof penetrates and extends into the cavity inside the base (21); the mounting block (232) is fixed to the upper surface of the connecting plate (231), and the bursting knife (233) is fixed to the upper surface of the mounting block (232).

5. A short pipe replacement cracking head according to claim 4, characterized in that: The width of the connecting plate (231) matches the width of the limiting opening (222), and the width of the mounting block (232) is greater than the width of the limiting opening (222).

6. A short pipe replacement cracking head according to claim 5, characterized in that: The disassembly component (24) comprises two springs (241), two push blocks (242), two connecting rods (243), and two clamping blocks (244). The left and right sides of the mounting block (232) are each provided with a first mounting groove (245). One end of the two springs (241) is respectively fixed to the inner wall of the two first mounting grooves (245) opposite to the inner wall, and the other end of the two springs (241) is respectively fixed to the two push blocks (242). The left and right sides of the connecting plate (231) are each provided with a second mounting groove (246). One end of the two connecting rods (243) is respectively fixed to the two push blocks (242), and the other end of the two connecting rods (243) respectively penetrates and extends to the inside of the two second mounting grooves (246) and is fixed to the clamping blocks (244).

7. A short pipe replacement split pipe head according to claim 1, characterized in that: The fixing mechanism (5) comprises a first connecting ring (51), a second connecting ring (52), a connecting piece (53), and a fixing piece (54); the first connecting ring (51) and the second connecting ring (52) are both arranged on the outside of the connecting tube (3) and are symmetrically distributed frontward and rearward about the central axis of the connecting tube (3); the first connecting ring (51) and the second connecting ring (52) are hingedly connected via a hinge shaft; the connecting piece (53) and the fixing piece (54) are both arranged on the first connecting ring (51) and the second connecting ring (52).

8. A short pipe replacement split pipe head according to claim 7, characterized in that: The connecting member (53) comprises a first connecting block (531), a second connecting block (532), a threaded rod (533), and a fixing nut (534); the first connecting block (531) is fixed to the outer side of the first connecting ring (51); the second connecting block (532) is fixed to the outer side of the second connecting ring (52); a first connecting groove (535) is provided on the upper surface of the first connecting block (531); the threaded rod (533) is hinged to the inner side of the first connecting groove (535) via a hinge shaft; a second connecting groove (536) is provided on the upper surface of the second connecting block (532); and the fixing nut (534) is threadedly connected to the outer side of the threaded rod (533).

9. A short pipe replacement cracking head according to claim 7, characterized in that: The fixing member (54) comprises a plurality of support plates (541), a plurality of fixing bolts (542), and a plurality of rubber pads (543); the plurality of support plates (541) are fixed to the right sides of the first connecting ring (51) and the second connecting ring (52), and are symmetrically distributed about the center axis of the connecting tube (3); the plurality of fixing bolts (542) are respectively threadedly connected to the inner sides of the plurality of support plates (541); and the plurality of rubber pads (543) are respectively fixed to one end of the plurality of fixing bolts (542) close to the replacement tube (4).

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