Short pipe replacement cracked pipe head for trenchless pipeline repair

Abstract

The utility model discloses a short pipe replacement crack pipe head for trenchless pipeline repair, which comprises a connecting pipe, one end of the connecting pipe is provided with a crack pipe head body, the upper side and the lower side of the crack pipe head body are both provided with openings, a telescopic plate penetrates through the openings, the outer side of the telescopic plate is provided with a mounting groove, and the mounting groove is provided with a through hole. A pin plate is inserted into the mounting groove, and a cutting knife is fixedly connected to the outer side of the pin plate; a threaded rod is rotationally connected to one end of the interior of the pipe cracking head body, a threaded block is in threaded connection with one side of the middle of the threaded rod, and the threaded block is matched with the telescopic plate in an abutting mode. Through the arrangement of the driving motor, the threaded block, the telescopic plate and the cutting knife, the driving motor drives the device to be in threaded fit with the threaded block to achieve threaded movement, the end of the threaded block is arranged in an arc shape, the threaded block can abut against the telescopic plate to achieve outward expansion, and expansion of the cutting knife can be adjusted for pipelines with different diameters through the structure.

Description

Technical Field

[0001] This utility model relates to the field of pipeline repair technology, and in particular to a short pipe replacement for cracked pipe heads in trenchless pipeline repair. Background Technology

[0002] Trenchless short-pipe replacement repair technology is an emerging pipeline repair technology. It involves connecting many short pipes together to form a single pipeline. Using a pipe bursting construction method, it replaces the drainage pipes between two manholes without digging a working pit, excavating the ground, or damaging the manhole.

[0003] Existing short-tube replacement pipe splitters can cut and split old pipes during use to replace them with replacement pipes. However, traditional methods are not easy to adjust during operation. If the diameter of the old pipe is larger than the pipe splitter, the replacement will be limited, affecting the effect of use. For example, Chinese Utility Model Patent Publication No. (CN202421097133.0) discloses a short-tube replacement pipe splitter. This patent mainly uses the replacement of the cutting blade, but it cannot be adjusted according to the needs when cutting and splitting old pipes of different diameters. Utility Model Content

[0004] The purpose of this invention is to provide a short pipe for trenchless pipeline repair to replace cracked pipe heads, which solves the problem that traditional methods are inconvenient to adjust during operation, and the replacement is limited because the diameter of the old pipe is larger than the cracked pipe head.

[0005] To achieve the above objectives, a short pipe replacement for cracked pipe heads in trenchless pipeline repair is provided, comprising: a connecting pipe, one end of which is provided with a cracked pipe head body, openings on both the upper and lower sides of the cracked pipe head body, a telescopic plate passing through the openings, an installation groove on the outer side of the telescopic plate, a pin plate inserted into the installation groove, and a cutting blade fixedly connected to the outer side of the pin plate.

[0006] The inside of the split tube head is rotatably connected to a threaded rod at one end, and a threaded block is threadedly connected to one side of the middle part of the threaded rod. The threaded block and the telescopic plate are in contact and fit together.

[0007] Several flexible clamps are fixedly connected to one end of the connecting pipe away from the pipe head. The flexible clamps are L-shaped and have clamps fitted on their outer surfaces.

[0008] According to the aforementioned method for replacing cracked pipe heads with short pipes for trenchless pipe repair, the cracked pipe head body has an external threaded groove at one end near the connecting pipe, and the connecting pipe has an internal threaded groove at one end near the cracked pipe head body, with the external threaded groove and the internal threaded groove threaded together.

[0009] According to the aforementioned trenchless pipeline repair method for replacing cracked pipe heads with short pipes, the connecting pipe has adjusting screws rotatably connected to both the upper and lower sides of its interior center. The adjusting screws have bidirectional threads on both sides of their center, and fixing rings are threaded to both sides of their center.

[0010] According to the aforementioned trenchless pipeline repair method for replacing cracked pipe heads with short pipes, a fixing block is fixedly connected to the inside of the connecting pipe near the middle of the cracked pipe head body, and a drive motor is fixedly connected between the fixing blocks.

[0011] According to the trenchless pipeline repair method for replacing cracked pipe heads with short pipes, the drive end of the drive motor and the threaded rod are fixedly connected.

[0012] According to the trenchless pipeline repair method for replacing cracked pipe heads with short pipes, the telescopic plate has grooves on both sides, and a slider is slidably fitted inside the groove, and the slider is fixedly connected to the cracked pipe head body.

[0013] According to the aforementioned method for replacing cracked pipe heads with short pipes for trenchless pipe repair, the telescopic plate is fixedly connected to a limit plate at its inner end near the cracked pipe head body.

[0014] According to the trenchless pipe repair method for replacing cracked pipe heads with short pipes, a rubber anti-slip layer is fixedly connected to the inner side of the flexible clamp, a sliding rod is provided on one side of the threaded rod, and the sliding rod is fixedly connected to the end of the cracked pipe head body, and the middle side of the sliding rod is slidably engaged with the threaded block.

[0015] The above-mentioned solution has the following beneficial effects:

[0016] This utility model incorporates an adjusting screw, a fixing ring, a clamp, a flexible clamping plate, and a rubber anti-slip layer. By rotating the adjusting screw, it engages with the fixing ring, clamping the fixing ring against the replacement pipe. The clamp is then fitted onto the outside of the flexible clamping plate and tightened again, ensuring a tight fit between the inner rubber anti-slip layer of the flexible clamping plate and the outer wall of the replacement pipe, increasing friction and stability. This structure provides a secure clamping grip on the replacement pipe, facilitating pipeline repair and replacement work.

[0017] This utility model is equipped with a drive motor, a threaded block, a telescopic plate, and a cutting blade. The drive motor drives the threaded block to engage with the threaded block, achieving threaded movement. The arc-shaped end of the threaded block can abut against the telescopic plate, thereby expanding outward. This structure allows for adjustment of the cutting blade's expansion for pipes of different diameters.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is a cross-sectional side view of a short pipe for replacing a cracked pipe head in trenchless pipeline repair according to this utility model.

[0021] Figure 2 This is a three-dimensional structural diagram of the front end of a short pipe for replacing a cracked pipe head in trenchless pipeline repair according to this utility model.

[0022] Figure 3 This is a three-dimensional structural diagram of the rear end of a short pipe for replacing a cracked pipe head in trenchless pipeline repair according to this utility model.

[0023] Figure 4 This is a structural diagram showing the disassembled structure of the cracked pipe head body and connecting pipe for replacing the cracked pipe head with a short pipe for trenchless pipeline repair according to this utility model.

[0024] Legend:

[0025] The components include: 1. Connecting pipe; 2. Slide rod; 3. Pin plate; 4. Cutting blade; 5. Mounting groove; 6. Pipe splitting head body; 7. Limiting plate; 8. Threaded rod; 9. Threaded block; 10. Drive motor; 11. Adjusting screw; 12. Fixing ring; 13. Flexible clamp; 14. Slide groove; 15. Clamp; 16. Rubber anti-slip layer; 17. External thread groove; 18. Internal thread groove; 19. Telescopic plate. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] Reference Figure 1-4This utility model provides a trenchless pipeline repair method for replacing cracked pipe heads with short pipes, comprising: a connecting pipe 1, a cracked pipe head body 6 at one end of the connecting pipe 1, openings on both the upper and lower sides of the cracked pipe head body 6 to facilitate the expansion and contraction of a telescopic plate 19, the telescopic plate 19 penetrating through the openings, an installation groove 5 on the outer side of the telescopic plate 19, a pin plate 3 inserted into the installation groove 5, the pin plate 3 at the end of a cutting blade 4 being inserted into the installation groove 5 and secured with bolts, a cutting blade 4 being fixedly connected to the outer side of the pin plate 3, the cutting blade 4 being able to cut and crack the old pipe, an external threaded groove 17 at the end of the cracked pipe head body 6 near the connecting pipe 1, an internal threaded groove 18 at the end of the connecting pipe 1 near the cracked pipe head body 6, and the external threaded groove 17 and the internal threaded groove 18 being threadedly engaged, the external threaded groove 17 and the internal threaded groove 18 at the end of the cracked pipe head body 6 being threadedly installed;

[0028] A threaded rod 8 is rotatably connected to one end of the internal part of the split pipe head body 6. A threaded block 9 is threadedly connected to one side of the middle part of the threaded rod 8. The threaded block 9 and the telescopic plate 19 abut against each other, and the abutment cooperation increases the support of the threaded block 9 for the telescopic plate 19. Adjusting screws 11 are rotatably connected to both the upper and lower sides of the middle part of the internal part of the connecting pipe 1. The pipe to be replaced can be inserted into the connecting pipe 1 at the tail end of the connecting pipe 1 to complete the connection. During connection, the screws 11 can be rotated to engage with the fixed ring 12, thereby realizing threaded movement. First, The fixed ring 12 is clamped against the replacement tube. The middle part of the adjusting screw 11 has bidirectional threads on both sides. The bidirectional threads can bring the fixed ring 12 close to each other to achieve threaded clamping. The middle part of the adjusting screw 11 is threaded with the fixed ring 12 on both sides. The telescopic plate 19 has a sliding groove 14 on both sides. The sliding groove 14 structure can increase the sliding stability displacement expansion. The sliding groove 14 has a slider slidingly engaged inside, and the slider is fixedly connected to the split tube head body 6. The inner end of the telescopic plate 19 near the split tube head body 6 is fixedly connected with a limit plate 7.

[0029] Several flexible clamps 13 are fixedly connected to the end of the connecting pipe 1 away from the head 6. The flexible clamps 13 are L-shaped. The L-shape prevents the clamps 15 from moving out of the flexible clamps. The flexibility of the flexible clamps 13 allows for better contact with the replacement tube, increasing friction and achieving a firm clamping effect. The outer surface of the flexible clamps 13 is fitted with clamps 15. By fitting the clamps 15 onto the outside of the flexible clamps 13, the clamps 15 are tightened again, ensuring that the inner rubber anti-slip layer 16 of the flexible clamps 13 is firmly attached to the outer wall of the replacement tube, increasing friction and firmness. A fixing block is fixedly connected to the inside of the connecting pipe 1 near the middle of the head 6. The fixing block allows for... The position of the drive motor 10 is fixed, and the drive motor 10 is fixedly connected between the fixed blocks. Driven by the drive motor 10, the drive block 9 is threaded to move. The end of the thread block 9 is arc-shaped, which can abut against the telescopic plate 19, thereby expanding outward. The drive end of the drive motor 10 is fixedly connected to the threaded rod 8. The inner side of the flexible clamp 13 is fixedly connected to the rubber anti-slip layer 16. The rubber anti-slip layer 16 increases the rubber contact with the replacement tube, and the friction is stronger. A slide rod 2 is provided on one side of the threaded rod 8. The slide rod 2 increases the limit and maintains stable position movement. The slide rod 2 is fixedly connected to the end of the split tube head body 6. The middle side of the slide rod 2 is slidably engaged with the threaded block 9.

[0030] Working principle: In use, firstly, the end pin plate 3 of the cutting blade 4 is inserted into the mounting groove 5 and tightened with bolts. Then, the external thread groove 17 and internal thread groove 18 of the end of the pipe head body 6 are threaded. After installation, the pipe to be replaced can be inserted into the connecting pipe 1 at the tail end to complete the connection. During connection, the rotation of the adjusting screw 11 can be adjusted. After rotation, it engages with the fixing ring 12 to achieve threaded movement. First, the fixing ring 12 is pressed against and clamped to the replacement pipe. After clamping, it is then fitted onto the flexible clamping plate 13 by the clamp 15. Externally, the clamp 15 is tightened again to ensure that the inner rubber anti-slip layer 16 of the flexible clamp 13 is firmly attached to the outer wall of the replacement pipe, increasing friction and stability. Then, the diameter of the cutting blade 4 is adjusted according to the diameter of the pipe. At this time, it can be driven by the drive motor 10 to engage with the threaded block 9 to achieve threaded movement. Through the arc-shaped end of the threaded block 9, it can abut against the telescopic plate 19, thereby achieving outward expansion. After expansion, the connecting pipe 1 can be pulled by the hydraulic winch to cut and crack the old pipe, which facilitates the replacement operation of the replacement pipe.

[0031] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A short pipe replacement method for trenchless pipeline repair, comprising: The connecting pipe (1) is characterized in that a split pipe head body (6) is provided at one end of the connecting pipe (1), and openings are provided on both the upper and lower sides of the split pipe head body (6). A telescopic plate (19) is passed through the inside of the opening, and an installation groove (5) is provided on the outside of the telescopic plate (19). A pin plate (3) is inserted into the inside of the installation groove (5), and a cutting blade (4) is fixedly connected to the outside of the pin plate (3). The inside of the split tube head body (6) is rotatably connected to a threaded rod (8), and a threaded block (9) is threadedly connected to one side of the middle part of the threaded rod (8). The threaded block (9) and the telescopic plate (19) are in contact and fit together. The end of the connecting pipe (1) away from the pipe head body (6) is fixedly connected with several flexible clamps (13), and the outer surface of the flexible clamps (13) is fitted with clamps (15).

2. The method for replacing a cracked pipe head in trenchless pipeline repair according to claim 1, characterized in that, The pipe head body (6) has an external threaded groove at one end near the connecting pipe (1), and the connecting pipe (1) has an internal threaded groove (18) at one end near the pipe head body (6), and the external threaded groove (17) and the internal threaded groove (18) are threaded together.

3. The method for replacing a cracked pipe head in trenchless pipeline repair according to claim 1, characterized in that, The connecting pipe (1) has an adjusting screw (11) rotatably connected to both the upper and lower sides inside. The adjusting screw (11) has a bidirectional thread on both sides of the middle part, and a fixing ring (12) is threaded to both sides of the middle part of the adjusting screw (11).

4. The method for replacing a cracked pipe head in trenchless pipeline repair according to claim 1, characterized in that, A fixing block is fixedly connected to the inside of the connecting pipe (1) near the middle of the split pipe head body (6), and a drive motor (10) is fixedly connected between the fixing blocks.

5. A short pipe replacement for a cracked pipe head in trenchless pipeline repair according to claim 4, characterized in that, The drive end of the drive motor (10) is fixedly connected to the threaded rod (8).

6. The method for replacing a cracked pipe head in trenchless pipeline repair according to claim 1, characterized in that, The telescopic plate (19) has grooves (14) on both sides, and a slider is slidably fitted inside the groove (14), and the slider is fixedly connected to the pipe head body (6).

7. The method for replacing a cracked pipe head in trenchless pipeline repair according to claim 1, characterized in that, Limiting plates (7) are fixedly connected to the inner end of the telescopic plate (19) near the crack head body (6).

8. A short pipe replacement method for trenchless pipeline repair according to claim 1, characterized in that, The flexible clamp (13) is fixedly connected to a rubber anti-slip layer (16) on the inner side. A slide rod (2) is provided on one side of the threaded rod (8), and the slide rod (2) is fixedly connected to the end of the split tube head body (6). The middle side of the slide rod (2) is slidably engaged with the threaded block (9). The flexible clamp (13) is L-shaped.

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