Pipe expanding head for non-excavation replacement and repair of reinforced concrete pipe

Abstract

The invention discloses a pipe expanding head for non-excavation replacement and repair of a reinforced concrete pipe. The pipe expanding head comprises a cutting and removing device, an opening connecting device arranged on the right side of the cutting and removing device, and a guide rod arranged between the cutting and removing device and the opening connecting device and used for connecting the cutting and removing device and the opening connecting device. According to the pipe expanding head for replacing and repairing the reinforced concrete pipe in the trenchless mode, the new reinforced concrete pipe is installed at the needed position, connection between a cutting and removing device and an expanding and connecting device is achieved through the arrangement of a guide rod, meanwhile, the pipe expanding head and expanding blades are made of alloy steel materials, and therefore the overall strength and abrasion resistance are improved in the actual use process, and the pipe expanding head is suitable for being used for replacing and repairing the reinforced concrete pipe in the trenchless mode. And through cooperation of the cutting and removing device, the guide rod and the opening and connecting device, the reinforced concrete pipe is replaced on the premise that soil is not excavated, and replacement of the reinforced concrete pipe is accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of replacing reinforced concrete pipes, in particular to an expansion pipe head for replacing and repairing reinforced concrete pipes without excavation. Background Art

[0002] Reinforced concrete pipe is also called prestressed concrete pressure pipe, or simply prestressed concrete pipe. Reinforced concrete pipes equipped with prestressed steel bars. Large-diameter, high-pressure cement pressure pipes are mostly prestressed reinforced concrete pipes, which are divided into two types: flat-end type and socket-end type. The flat-end type has been gradually eliminated. The socket-end type pipe is divided into three parts along the longitudinal length: the socket section, the pipe body and the spigot section. The pipe wall is equipped with circumferential and longitudinal prestressed steel bars. The inner diameter is as small as 10cm and as large as several meters. The thickness of the pipe wall is determined by the pipe diameter and the internal pressure.

[0003] For example, a Chinese patent in the field of building pipelines specifically relates to a tool for expanding and installing the pipe orifices of flexible pipes. An expansion head (publication number: CN206918524U), including an expansion petal assembly, the head of the expansion petal assembly is generally cylindrical, and the expansion petal assembly is evenly divided into expansion petals along the axis; it also includes a cylindrical fixing cap; it also includes an elastic ring, which is wrapped around the cylinder of the expansion petal assembly to form an expansion part. An expansion head of the utility model has no gaps between the traditional expansion petals after expansion, and the expansion is uniform, does not damage the plastic inner wall of the flexible pipe, is not easy to cause the pipe orifice to rupture, and the inner wall of the flexible pipe is smooth and easy to seal after expansion, eliminating the safety hazards of pipeline installation. The utility model improves the existing technology and is used in new pipe fields, has obvious beneficial effects, and has market promotion value.

[0004] Reinforced concrete pipes are widely used and are often installed underground for drainage or guide lines. However, in actual use, they are subjected to strong external pressure, causing damage to the pipes, or in actual use, they need to be replaced with reinforced concrete pipes of larger diameter. During the actual replacement, it is often necessary to dig out the soil on the top of the reinforced concrete pipe before replacing it, which results in a large workload and a long replacement time, and cannot meet the replacement needs.

[0005] Therefore, those skilled in the art provide an expansion head for trenchless replacement and repair of reinforced concrete pipes to solve the problems raised in the above background technology. Summary of the invention

[0006] The object of the present invention is to provide an expansion head for trenchless replacement and repair of reinforced concrete pipes, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A pipe expansion head for trenchless replacement and repair of reinforced concrete pipes, comprising a cutting and clearing device, a spreading and connecting device arranged on the right side of the cutting and clearing device, and a guide rod arranged between the cutting and clearing device and the spreading and connecting device to connect the cutting and clearing device and the spreading and connecting device;

[0009] The cutting and clearing device comprises a first mounting rod, an expansion head sleeved on the outside of the first mounting rod, two motors arranged inside the expansion head, a diamond disc saw blade arranged inside the expansion head for cutting waste concrete pipes, a second connector fixedly mounted on the right side of the first mounting rod, and a second movable hinge fixedly mounted on the left side of the first mounting rod, wherein the output end of the motor is fixedly connected to the diamond disc saw blade;

[0010] The expansion connection device includes a second mounting rod, four expansion blades arranged on the outside of the second mounting rod for expanding the cut waste concrete pipe, a connecting ring sleeved on the outside of the second mounting rod and a top rod arranged on the inside of the expansion blades for adjusting the opening and closing of the expansion blades, a third connecting head is fixedly installed on the right side of the second mounting rod, and a third movable hinge is fixedly installed on the left side of the second mounting rod.

[0011] As a further solution of the present invention: a first connecting head is fixedly installed on the right side of the guide rod, and the right side of the first connecting head penetrates into the interior of the third movable hinge and is connected to the third movable hinge through a first bolt.

[0012] As a further solution of the present invention: a first movable hinge is fixedly installed on the left side of the guide rod, and the left side of the first movable hinge is sleeved on the outside of the second connecting head and connected to the second connecting head through a second bolt.

[0013] As a further solution of the present invention: the cutting and clearing device also includes a mounting plate fixedly mounted on the front side of the first mounting rod, and the back sides of the two motors are fixedly connected to the front side of the mounting plate.

[0014] As a further solution of the present invention: the expansion connection device also includes through holes evenly opened inside the second mounting rod and positioning pins inserted in the through holes, and both sides of the positioning pins pass through the connecting ring.

[0015] As a further solution of the present invention: the expansion connection device also includes a first groove opened inside the connecting ring and a fourth movable hinge fixedly installed on the inner side of the expansion blade, and the two sides of the top rod respectively penetrate into the fourth movable hinge and the first groove and are rotatably connected with the fourth movable hinge and the first groove through a first pin.

[0016] As a further solution of the present invention: the expansion connection device also includes four limit rods fixedly installed on the outside of the second installation rod and four second grooves opened on the left side of the expansion blade, and the limit rods penetrate into the interior of the second grooves and are rotatably connected to the second grooves through second pins.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention realizes cutting and destruction of waste reinforced concrete pipes by setting a cutting and clearing device, and realizes opening of the cut reinforced concrete pipes by setting an opening and connecting device, and at the same time realizes fixing of the reinforced concrete pipe to be installed, and installs the new reinforced concrete pipe to the required position, and realizes connection between the cutting and clearing device and the opening and connecting device by setting a guide rod. At the same time, the expansion head and the opening blades are made of alloy steel, thereby increasing the overall strength and wear resistance in actual use. The cutting and clearing device, the guide rod and the opening and connecting device cooperate with each other without excavating the soil, thereby reducing the practical amount and accelerating the replacement of the reinforced concrete pipe.

[0019] 2. The present invention realizes the installation of the motor through the setting of the mounting plate, and realizes the cutting of the waste reinforced concrete pipe through the cooperation between the motor and the diamond disc saw blade, so as to facilitate the subsequent installation of new reinforced concrete pipes, and realizes the accommodation of the positioning pins through the setting of the through holes, and realizes the fixing of the connecting ring through the setting of the through holes and the positioning pins. At the same time, when the positioning pins are inside different through holes, the connecting ring is fixed at different positions, thereby realizing the opening and closing of the opening blades, and meeting the requirements of opening pipes of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an expansion head for trenchless replacement and repair of reinforced concrete pipes;

[0021] Figure 2 It is a schematic diagram of the structure of a cutting and clearing device in an expansion head for trenchless replacement and repair of reinforced concrete pipes;

[0022] Figure 3 It is a structural schematic diagram of a bracing connection device in an expansion head for trenchless replacement and repair of reinforced concrete pipes;

[0023] Figure 4 It is a schematic diagram of the internal structure of a bracing connection device in an expansion head for trenchless replacement and repair of reinforced concrete pipes;

[0024] Figure 5 A non-excavation replacement and repair of reinforced concrete pipe expansion head Figure 1 Enlarged structural diagram at A in the middle.

[0025] The reference numerals in the figure are: 1. cutting and clearing device; 11. expansion head; 12. first mounting rod; 13. second connecting head; 14. mounting plate; 15. motor; 16. diamond disc saw blade; 17. second movable hinge; 2. guide rod; 3. opening connection device; 31. opening blade; 32. second mounting rod; 33. third connecting head; 34. connecting ring; 35. push rod; 36. third movable hinge; 37. through hole; 38. fourth movable hinge; 39. first groove; 310. positioning pin; 311. second groove; 312. limit rod; 4. first movable hinge; 5. first connecting head. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] See also Figure 1-5, an expansion head for trenchless replacement and repair of reinforced concrete pipes, comprising a cutting and clearing device 1, a spreading and connecting device 3 arranged on the right side of the cutting and clearing device 1, and a guide rod 2 arranged between the cutting and clearing device 1 and the spreading and connecting device 3 to connect the cutting and clearing device 1 with the spreading and connecting device 3;

[0030] The cutting and clearing device 1 comprises a first mounting rod 12, an expansion head 11 sleeved on the outside of the first mounting rod 12, two motors 15 arranged inside the expansion head 11, a diamond disc saw blade 16 arranged inside the expansion head 11 for cutting waste concrete pipes, a second connector 13 fixedly mounted on the right side of the first mounting rod 12, and a second movable hinge 17 fixedly mounted on the left side of the first mounting rod 12, and the output end of the motor 15 is fixedly connected to the diamond disc saw blade 16;

[0031] The expansion connection device 3 includes a second mounting rod 32, four expansion blades 31 arranged on the outside of the second mounting rod 32 for expanding the cut waste concrete pipe, a connecting ring 34 sleeved on the outside of the second mounting rod 32 and a top rod 35 arranged on the inside of the expansion blade 31 for adjusting the opening and closing of the expansion blade 31. A third connecting head 33 is fixedly installed on the right side of the second mounting rod 32, and a third movable hinge 36 is fixedly installed on the left side of the second mounting rod 32.

[0032] Specifically, a first connector 5 is fixedly mounted on the right side of the guide rod 2 , and the right side of the first connector 5 penetrates into the interior of the third movable hinge 36 and is connected to the third movable hinge 36 via a first bolt.

[0033] Through the above technical solution, the connection between the second mounting rod 32 and the guide rod 2 is achieved through the cooperation between the first connecting head 5 and the third movable hinge 36.

[0034] Specifically, a first movable hinge 4 is fixedly installed on the left side of the guide rod 2 , and the left side of the first movable hinge 4 is sleeved on the outside of the second connecting head 13 and connected to the second connecting head 13 via a second bolt.

[0035] Through the above technical solution, the connection between the guide rod 2 and the first installation rod 12 is achieved through the cooperation between the first movable hinge 4 and the second connector 13 .

[0036] Specifically, the cutting and clearing device 1 further comprises a mounting plate 14 fixedly mounted on the front side of the first mounting rod 12 , and the back sides of the two motors 15 are fixedly connected to the front side of the mounting plate 14 .

[0037] Through the above technical solution, the motor 15 is installed by setting the mounting plate 14, and the waste reinforced concrete pipes are cut through the cooperation between the motor 15 and the diamond disc saw blade 16, thereby facilitating the subsequent installation of new reinforced concrete pipes.

[0038] Specifically, the expansion connection device 3 further includes through holes 37 evenly arranged inside the second mounting rod 32 and positioning pins 310 inserted into the through holes 37 , and two sides of the positioning pins 310 pass through the connection ring 34 .

[0039] Through the above technical scheme, the positioning pin 310 is accommodated by the setting of the through hole 37, and the connecting ring 34 is fixed by the setting of the through hole 37 and the positioning pin 310. At the same time, when the positioning pin 310 is inside different through holes 37, the connecting ring 34 is fixed at different positions, thereby realizing the opening and closing of the opening blades 31, so as to meet the needs of opening pipes of different diameters.

[0040] Specifically, the expansion connection device 3 also includes a first groove 39 opened inside the connecting ring 34 and a fourth movable hinge 38 fixedly installed on the inner side of the expansion blade 31. The two sides of the top rod 35 respectively penetrate into the fourth movable hinge 38 and the first groove 39 and are rotatably connected with the fourth movable hinge 38 and the first groove 39 through a first pin.

[0041] Through the above technical solution, the fourth movable hinge 38, the first groove 39 and the first latch are used to cooperate with each other to realize the rotation of the push rod 35, thereby realizing the opening and closing of the opening blade 31.

[0042] Specifically, the expansion connection device 3 also includes four limit rods 312 fixedly installed on the outside of the second installation rod 32 and four second grooves 311 opened on the left side of the expansion blade 31. The limit rods 312 penetrate into the interior of the second grooves 311 and are rotatably connected to the second grooves 311 through second pins.

[0043] Through the above technical solution, the second groove 311, the limiting rod 312 and the second pin cooperate to fix the expansion blade 31 relative to the second mounting rod 32, and at the same time, the left side of the expansion blade 31 is rotated and the right side of the expansion blade 31 is unfolded, so that pipes with different diameters can be expanded.

[0044] The working principle of the present invention is: the cutting and removing device 1, the guide rod 2 and the expansion connection device 3 are placed in sequence, so that the second connecting head 13 penetrates into the interior of the first movable hinge 4, and the first connecting head 5 penetrates into the interior of the third movable hinge 36 and is connected by bolts. After the connection is completed, the external traction device is connected to the second movable hinge 17. After the connection is completed, the new reinforced concrete pipe to be installed is connected to the third connecting head 33. According to the size of the waste reinforced concrete pipe to be replaced, the positioning pin 310 is pulled out to move the connecting ring 34 and then push the expansion blade 31 to open and close. After adjusting to the required size, the whole is pulled into the waste reinforced concrete pipe by the traction device, and the diamond disc saw blade 16 is driven by the motor 15 to rotate to achieve cutting and destruction of the waste reinforced concrete pipe. At the same time, with the entry of the expansion blade 31, the cut waste reinforced concrete pipe is expanded under the support of the expansion blade 31. At the same time, with the movement of the cutting and removing device 1, the guide rod 2 and the expansion connection device 3, the new reinforced concrete pipe is sent to the installation position.

[0045] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pipe expansion head for trenchless replacement and repair of reinforced concrete pipes, comprising a cutting and clearing device (1), a spreading and connecting device (3) arranged on the right side of the cutting and clearing device (1), and a guide rod (2) arranged between the cutting and clearing device (1) and the spreading and connecting device (3) to connect the cutting and clearing device (1) and the spreading and connecting device (3), characterized in that: The cutting and clearing device (1) comprises a first mounting rod (12), an expansion head (11) sleeved on the outside of the first mounting rod (12), two motors (15) arranged inside the expansion head (11), a diamond disc saw blade (16) arranged inside the expansion head (11) for cutting waste concrete pipes, a second connecting head (13) fixedly mounted on the right side of the first mounting rod (12) and a second movable hinge (17) fixedly mounted on the left side of the first mounting rod (12), and the output end of the motor (15) is fixedly connected to the diamond disc saw blade (16).

2. The expansion head for trenchless replacement and repair of reinforced concrete pipes as claimed in claim 1, characterized in that: The spreading connection device (3) comprises a second mounting rod (32), four spreading blades (31) arranged on the outside of the second mounting rod (32) for spreading the cut waste concrete pipe, a connecting ring (34) sleeved on the outside of the second mounting rod (32), and a top rod (35) arranged on the inside of the spreading blades (31) for opening and closing the spreading blades (31), a third connecting head (33) is fixedly mounted on the right side of the second mounting rod (32), and a third movable hinge (36) is fixedly mounted on the left side of the second mounting rod (32).

3. The expansion head for trenchless replacement and repair of reinforced concrete pipes according to claim 1, characterized in that: A first connecting head (5) is fixedly mounted on the right side of the guide rod (2); the right side of the first connecting head (5) penetrates into the interior of the third movable hinge (36) and is connected to the third movable hinge (36) via a first bolt.

4. The expansion head for trenchless replacement and repair of reinforced concrete pipes as claimed in claim 1, characterized in that: A first movable hinge (4) is fixedly mounted on the left side of the guide rod (2); the left side of the first movable hinge (4) is sleeved on the outside of the second connecting head (13) and is connected to the second connecting head (13) via a second bolt.

5. The expansion head for trenchless replacement and repair of reinforced concrete pipes as claimed in claim 1, characterized in that: The cutting and clearing device (1) further comprises a mounting plate (14) fixedly mounted on the front side of the first mounting rod (12), and the back sides of the two motors (15) are fixedly connected to the front side of the mounting plate (14).

6. The expansion head for trenchless replacement and repair of reinforced concrete pipes according to claim 1, characterized in that: The expansion connection device (3) further comprises through holes (37) evenly arranged inside the second mounting rod (32) and positioning pins (310) inserted into the through holes (37), and two sides of the positioning pins (310) pass through the connection ring (34).

7. The expansion head for trenchless replacement and repair of reinforced concrete pipes as claimed in claim 1, characterized in that: The expansion connection device (3) further comprises a first groove (39) provided inside the connection ring (34) and a fourth movable hinge (38) fixedly mounted on the inner side of the expansion blade (31); two sides of the top rod (35) respectively penetrate into the fourth movable hinge (38) and the first groove (39) and are rotationally connected to the fourth movable hinge (38) and the first groove (39) via a first latch.

8. The expansion head for trenchless replacement and repair of reinforced concrete pipes as claimed in claim 1, characterized in that: The spreading connection device (3) further comprises four limiting rods (312) fixedly mounted on the outside of the second mounting rod (32) and four second grooves (311) formed on the left side of the spreading blade (31); the limiting rods (312) penetrate into the inside of the second grooves (311) and are rotatably connected to the second grooves (311) via second latches.

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