Pipe out-of-roundness correction device

Abstract

The utility model relates to a pipe out-of-roundness correcting device which comprises at least one rotating rod and correcting pieces installed at the two ends of the rotating rod and further comprises a driving assembly, the driving assembly is connected to the midpoint of the rotating rod and used for driving the rotating rod to rotate in the radial direction of the rotating rod, and an operator places the rotating rod on the inner side of a pipe to be repaired. The correcting piece abuts against the inner wall of the to-be-corrected pipe and generates extrusion force, then an operator holds the driving assembly to rotate so as to drive the rotating rod and the correcting piece to rotate in the radial direction, the out-of-roundness position of the pipe can be extruded by the correcting piece to deform, and therefore correction of the out-of-roundness of the pipe is achieved. According to the utility model, the operation distance is prolonged, and the operation position is changed, so that the operation is not limited to the opening or the interior of the pipe any more, the operation space is enlarged, the operation is more convenient for operators to operate, and the out-of-roundness correction is efficiently carried out on the pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a device for correcting the out-of-roundness of pipes. Background Art

[0002] Large-diameter pipes have unique advantages in the fields of domestic water supply, seawater aquaculture, seawater desalination projects, submarine waste discharge and sewage disposal, conveying corrosive media or slurries, being applied to corrosive soil environments, and being used for the in-situ lining method to repair old pipes. With the acceleration of the urbanization construction process, the demand for large-diameter pipes is also increasing day by day. However, due to their large own weight, large-diameter pipes will be squeezed during the production and transportation process, resulting in the out-of-roundness exceeding the standard, which makes it inconvenient to operate during the hot-melt connection of pipes and will cause a series of problems such as poor sealing performance and weak internal pressure resistance of the finished products. Therefore, before the hot-melt connection of large-diameter pipes, it is necessary to correct their out-of-roundness.

[0003] The prior art discloses "a device for correcting the out-of-roundness of pipes", which includes a support rod and end heads designed at both ends of the support rod. A screw is connected to the end head, and the screw is threadedly connected to the support rod, and the threads on the screws corresponding to the two end heads are arranged in the opposite direction. An arc surface for supporting the inner wall of the pipe to be corrected is arranged on the side of the end head away from the support rod. In actual operation, the operator axially rotates the support rod to screw out the screws corresponding to the two end heads, and flattens the sunken part of the pipe, so as to realize the correction of the pipe. This device can correct the out-of-roundness of the pipe from different directions, but the problem is that the structural design of this tool makes most of the operations concentrated at the pipe port. When it is necessary to operate inside the pipe, the operator often needs to bend down and enter the pipe, which is very inconvenient to operate. Summary of the Utility Model

[0004] One of the purposes of the utility model is to provide a device for correcting the out-of-roundness of pipes to solve the problem of inconvenient operation when correcting the out-of-roundness of pipes in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A device for correcting the out-of-roundness of pipes includes at least one rotating rod and correction parts installed at both ends of the rotating rod. It is characterized in that it further includes a driving assembly, the driving assembly is connected to the midpoint of the rotating rod, and the driving assembly is used to drive the rotating rod to rotate along its radial direction.

[0007] In the above technical solution, the operator places the rotating rod inside the pipe to be repaired. The correcting part presses against the inner wall of the pipe to be repaired and generates an extrusion force. Then the operator holds the driving component and rotates it, thereby driving the rotating rod and the correcting part to rotate along its radial direction. The non-circular part of the pipe will be deformed by the extrusion of the correcting part, thereby reducing the non-circularity. The driving component changes the operation direction, making it more convenient for human operation. Moreover, the driving component extends the operation distance and changes the operation position, making the operation no longer limited to the pipe opening or the inside of the pipe, increasing the operation space and reducing the operation difficulty, with better convenience.

[0008] Preferably, the driving component includes a driving rod and a holding part. The holding part is installed at one end of the driving rod away from the rotating rod, and the other end of the driving rod is connected to the rotating rod. The holding part can facilitate the user to hold it with the palm. Compared with directly holding the rotating rod, the contact area between the holding part and the operator's palm is larger, so that the driving rod can be operated more labor-saving and smoothly, with better convenience. The driving rod extends the whole device, enabling the rotating rod to extend deeper into the pipe, so that it is easier to correct the inside of the pipe, with better applicability.

[0009] Preferably, the holding part includes a rotating disc and a handle. The axis of the rotating disc is on the same straight line as the axis of the driving rod, and the handle is installed on the rotating disc. The setting of the disc expands the distance of holding with both hands, making it more convenient for the human body to exert force. The axis of the rotating disc is on the same straight line as the axis of the driving rod, so that the rotation is not eccentric and the force exerted by both hands is more evenly distributed. The setting of the handle extends the power arm and reduces the operating force, with better convenience.

[0010] Preferably, the driving rod includes an outer rod, an inner rod, and a locking part. One end of the outer rod close to the rotating rod is provided with a sliding cavity. The inner rod is installed in the sliding cavity and is slidably connected to the outer rod. The locking part is used to connect and fix the inner rod and the outer rod. By pulling the inner rod, the overall length of the driving rod can be extended, enabling the device to correct deeper positions of the pipe. At the same time, when the operation is completed, the inner rod can be retracted, which is convenient for storage, with better applicability and convenience. The setting of the locking part prevents the relative sliding of the inner and outer rods after the length of the driving rod is adjusted, reducing the correction efficiency, with better stability.

[0011] Preferably, the locking part is a fastening bolt. The fastening bolt is threadedly connected to the outer rod and can extend into the sliding cavity. After determining the length of the driving rod, the fastening bolt can be screwed. One end of the fastening bolt in the sliding cavity will squeeze the inner rod into the sliding cavity to form a clamping force and fix the inner rod, with better stability.

[0012] Preferably, it further includes a fixing bracket, which includes a rod sleeve and legs connected to the rod sleeve. The outer rod is installed in the rod sleeve and is movably connected to the rod sleeve. The legs of the fixing bracket are placed on the ground and can be connected to the ground as needed to stably support the rod sleeve. The rod sleeve restricts excessive movement of the driving rod in other directions except for axial rotation and radial translation, reducing the deviation of the correction radius and power loss caused by excessive movement of the driving rod in other directions, with better accuracy and stability. And the small gap between the driving rod and the rod sleeve will not cause any adverse effects.

[0013] Preferably, the correction member includes a sleeve and a rolling part. The rolling part is installed at one end of the sleeve away from the center of the rotating rod. At least one rotation direction of the rolling part is the same as the movement direction of the rotating rod. The sleeve is connected to the rotating rod. The rolling part is in rolling connection with the inner wall of the pipe. Compared with sliding friction, the resistance is smaller, reducing the operating force and making it more convenient for the operator to operate, with better convenience.

[0014] Preferably, the rolling part is a universal ball assembly, and the sleeve is threadedly connected to the rotating rod. Before operation, the operator can turn the sleeve to adjust the correction radius to the standard radius of the pipe to be repaired. Therefore, this device can correct pipes with different diameters, with better applicability. The universal ball can rotate 360 degrees, and the friction resistance becomes smaller, and the non-circularity of the inside of the pipe can be corrected at one time, with better convenience.

[0015] Preferably, the sleeve is a hexagonal sleeve. The setting of the hexagonal sleeve matches the shape of the common wrench jaws on the market, making it convenient for the operator to use a wrench to turn the sleeve, with better convenience.

[0016] Preferably, a scale is marked on the rotating rod. It is convenient for the operator to adjust the correction radius. The user adjusts the end of the sleeve close to the center of the rotating rod to the same scale as the standard radius of the pipe to be repaired. At this time, the correction radius is the standard radius, with better accuracy.

[0017] The beneficial effects of the present utility model: Through the setting of the driving component, the operation direction of the device is changed, which is more suitable for the human body to exert force. And the driving component extends the operation distance and changes the operation position, making the operation no longer limited to the pipe opening or the inside, increasing the operation space and making it more convenient for the operator to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of a device for correcting the non-circularity of a pipe of the present utility model;

[0019] Figure 2 is Figure 1 a partial enlarged view of position A of

[0020] Figure 3 This is a schematic diagram of another implementation manner of the correction part of the present utility model.

[0021] Among them, 1. Rotating rod; 2. Correction piece; 201. Rolling part; 202. Sleeve; 3. Driving assembly; 301. Driving rod; 3011. Outer rod; 3012. Inner rod; 3013. Locking piece; 302. Holding part; 3021. Rotating disc; 3022. Handle; 4. Fixing device; 401. Rod sleeve; 402. Leg. Specific implementation manner

[0022] The following will illustrate the implementation manners of the present utility model with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be understood that the preferred embodiments are only for illustrating the present utility model and not for limiting the protection scope of the present utility model.

[0023] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Therefore, only the components related to the present utility model are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0024] Embodiment 1:

[0025] As Figure 1-2Embodiment 1 of a device for correcting the out-of-roundness of a pipe, as shown, includes a rotating rod 1, correcting members 2 installed at both ends of the rotating rod 1, and a driving assembly 3 fixedly connected to the midpoint of the rotating rod 1. The connection method here is welding, and in addition, it can also be rivet connection, integral molding, threaded connection, etc. The correcting member 2 includes a rolling part 201 and a sleeve 202. The rolling part 201 is installed at one end of the sleeve 202 away from the center of the rotating rod 1. At least one rotation direction of the rolling part 201 is the same as the movement direction of the rotating rod 1. The rolling part 201 is in rolling connection with the inner wall of the pipe to be repaired. The sleeve 202 is in threaded connection with the rotating rod 1. In this embodiment, the rolling part 201 is a universal ball assembly, and the sleeve 202 is a hexagonal sleeve. The rotating rod 1 is marked with scales. The driving assembly 3 includes a driving rod 301 and a holding part 302. The holding part 302 is installed at the end of the driving rod 301 away from the rotating rod 1. The other end of the driving rod 301 is connected to the rotating rod 1. The holding part 302 includes a rotating disc 3021 and a handle 3022. The axis of the rotating disc 3021 and the axis of the driving rod 301 are on the same straight line. The handle 3022 is installed on the curved surface of the rotating disc 3021.

[0026] Specifically, when operating the device to correct the out-of-roundness of the pipe, first, the operator determines the standard radius of the pipe to be repaired to ensure the accuracy of the correction. Then, fix the pipe to prevent it from moving, and appropriately place a pad under the pipe to lift the pipe so that the axis of the pipe and the axis of the driving rod 301 are on the same straight line to ensure that the correction does not deviate. Immediately afterwards, place the rotating rod 1 inside the pipe, and then use a wrench to turn the hexagonal sleeve 202. The operator looks at the scale on the rotating rod 1 while turning the sleeve 202. This scale is the scale of the correction radius. When the end of the sleeve 202 close to the center of the rotating rod 1 just coincides with the scale corresponding to the standard radius of the pipe, stop turning. It can be adjusted a little more appropriately to make the correcting member 2 exert a certain pressing force on the inner wall of the pipe. Then, the operator holds the handle 3022 installed on the curved surface of the rotating disc 3021 and turns it. The setting of the rotating disc 3021 makes it more convenient for the human body to exert force. The setting of the handle 3022 extends the power arm and reduces the operating force of the operator. The rotating disc 3021 will drive the connected driving rod 301 to rotate, thereby driving the rotating rod 1 and the correcting member 2 to perform radial rotation. When the correcting member 2 contacts the out-of-round part of the pipe, the out-of-round part of the pipe will be squeezed by the correcting member 2 and deform, thereby reducing the out-of-roundness. The driving assembly 3 changes the operation direction, making it more convenient for the human body to operate. Moreover, the driving assembly 3 extends the operating distance, making the operation of this device no longer limited to the pipe opening or the inside of the pipe, increasing the operating space. The operator can appropriately push the driving assembly 3 forward after turning a few circles for each out-of-round part. Since the universal ball can rotate 360 degrees, the correction position will also move radially along the pipe to correct the next place. Repeating this operation multiple times can achieve the correction of the out-of-roundness of the pipe.

[0027] Advantages of this embodiment: The setting of the driving component 3 changes the operation direction of the device, making it more suitable for human force application. Moreover, the driving component 3 extends the operation distance, enabling the operation to no longer be limited to the pipe opening or the interior, increasing the operation space and making it more convenient for the operator to operate. The setting of the universal ball component reduces the friction between the device and the pipe to be repaired, reducing the operating force. Additionally, the universal ball component can rotate 360 degrees, thus enabling the entire pipe to be corrected in one go, with better continuity. The setting of the holding part 302 facilitates holding and reduces the force exerted.

[0028] In addition, another implementation of the driving component 3 is provided. The difference from the above embodiment lies in that the driving component includes a driving motor and a driving rod 301. The driving rod 301 is fixedly connected to the rotating rod 1, specifically, it can be welded or integrally formed, etc. The driving motor is used to drive the driving rod 301 to rotate radially, thereby driving the rotating rod 1 and the correcting members 2 installed at both ends of the rotating rod to rotate radially. At the same time, the operator operates the driving rod 301 to drive the correcting members 2 to move radially, so as to realize the correction of the pipe ovality. The advantage of this embodiment is that the driving motor is used to drive the rotating rod 1 to rotate axially, achieving partial automation, saving manpower, improving work efficiency, and having better convenience. The operator operates the driving rod 301, so that the correcting members 2 of the device can be accurately positioned at the place to be corrected, with better accuracy.

[0029] In addition, another implementation of the correcting member 2 is provided, as Figure 3 shown. The difference from the above embodiment lies in that the rolling part 201 is a cylindrical roller. The curved surface of the roller is tangent to the inner wall of the pipe to be repaired. A through hole is opened at the axis of the roller, and the bracket connected to the sleeve 202 passes through the through hole. The sleeve 202 and the rolling part 201 are rotatably connected. The advantage of this embodiment is that compared with the universal ball, when the rotating rod 1 rotates by the same angle, the contact surface between the roller and the inner wall of the pipe is larger. Therefore, the correction of the pipe is faster. However, the limitation is that the friction is relatively large when the rolling part moves radially on the inner wall of the pipe. After one full rotation, the position of the sleeve 202 needs to be readjusted. Therefore, different types of rolling parts 201 should be selected according to different pipes.

[0030] In addition, another implementation of the holding part 302 is provided. The difference from the above embodiment lies in that the holding part 302 is a crank. One end of the crank is installed at the end of the driving rod 301 far from the rotating rod, and the rotation axis of the crank is on the same straight line as the axis of the driving rod 301.

[0031] Embodiment 2:

[0032] Embodiment 2 of a device for correcting the out-of-roundness of pipe materials, which is different from Embodiment 1 in that the driving rod 301 includes an outer rod 3011, an inner rod 3012, and a locking member 3013. A sliding cavity is provided at one end of the outer rod 3011 close to the rotating rod 1. The inner rod 3012 is installed in the sliding cavity and is slidably connected to the outer rod 3011. The locking member 3013 is used to fix the inner rod 3012. By pulling the inner rod 3012, the overall length of the driving rod 301 can be extended, so that the correcting member 2 can correct deeper positions of the pipe. At the same time, when the operation is completed, the inner rod 3012 can be retracted, which is convenient for storage, has better applicability and convenience. The setting of the fixing member prevents the relative sliding of the inner and outer rods 3011 after the length is adjusted, reduces the correction efficiency, and has better stability. The locking member 3013 is a fastening bolt, which is threadedly connected to the outer rod 3011 and can extend into the sliding cavity. After determining the length of the driving rod 301, the fastening bolt can be screwed, and one end of the fastening bolt will squeeze the inner rod 3012 into the sliding groove to form a clamping force to fix the inner rod 3012, and the stability is better.

[0033] The remaining features and technical effects of this embodiment are the same as those of Embodiment 1.

[0034] Embodiment 3:

[0035] Embodiment 3 of a device for correcting the out-of-roundness of pipe materials, which is different from the above Embodiment 1 or Embodiment 2 in that the fixed bracket includes a rod sleeve 401 and legs 402 connected to the rod sleeve 401. The driving rod 301 is installed in the rod sleeve 401 and is movably connected to the rod sleeve 401, and the connection method is clearance fit. The legs 402 of the fixed bracket are placed on the ground and can be connected to the ground as needed to stably support the rod sleeve 401. The rod sleeve 401 and the outer rod 3011 are in clearance fit. The rod sleeve 401 limits excessive movement of the driving rod 301 in other directions except for axial rotation and radial translation, reduces the deviation of the correction radius and the loss of force caused by excessive movement of the driving rod 301 in other directions, has better accuracy and stability, and the small gap between the driving rod 301 and the rod sleeve 401 will not cause adverse effects.

[0036] The remaining features and technical effects of this embodiment are the same as those of Embodiment 1 and Embodiment 2.

[0037] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.

Claims

1. A device for correcting the out-of-roundness of a pipe, comprising at least one rotating rod (1) and correction members (2) mounted on both ends of the rotating rod (1), characterized in that: It also comprises a driving assembly (3), wherein the driving assembly (3) is connected to the midpoint of the rotating rod (1); the driving assembly (3) is used for driving the rotating rod (1) to rotate along its radial direction.

2. A pipe out-of-roundness correction device according to claim 1, characterized in that: The driving assembly (3) comprises a driving rod (301) and a gripping portion (302); the gripping portion (302) is mounted on one end of the driving rod (301) away from the rotating rod (1); and the other end of the driving rod (301) is connected to the rotating rod (1).

3. A pipe out-of-roundness correction device according to claim 2, characterized in that: The gripping portion (302) comprises a rotating disc (3021) and a handle (3022); the axis of the rotating disc (3021) and the axis of the driving rod (301) are located in the same straight line; and the handle (3022) is mounted on the rotating disc (3021).

4. The device for correcting the out-of-roundness of a pipe according to claim 2, characterized in that: The driving rod (301) comprises an outer rod (3011), an inner rod (3012), and a locking member; a sliding cavity is provided at one end of the outer rod (3011) close to the rotating rod (1); the inner rod (3012) is installed in the sliding cavity and is slidably connected to the outer rod (3011); and the locking member is used to connect and fix the inner rod (3012) and the outer rod (3011).

5. The device for correcting the out-of-roundness of a pipe according to claim 4, characterized in that: The locking member (3013) is a fastening bolt; the fastening bolt is threadedly connected to the outer rod (3011) and can extend into the sliding cavity.

6. A pipe out-of-roundness correction device according to claim 5, characterized in that: It also includes a fixed bracket, which includes a rod sleeve (401) and a support leg (402) connected to the rod sleeve (401); the outer rod (3011) is installed in the rod sleeve (401) and is movably connected to the rod sleeve (401).

7. A pipe out-of-roundness correction device according to any one of claims 1 to 6, characterized in that: The correction member (2) comprises a sleeve (202) and a rolling portion (201); the rolling portion (201) is mounted on an end of the sleeve (202) away from the center of the rotating rod (1); at least one rotation direction of the rolling portion (201) is consistent with the movement direction of the rotating rod (1); and the sleeve (202) is connected to the rotating rod (1).

8. The device for correcting the out-of-roundness of a pipe according to claim 7, characterized in that: The rolling part (201) is a universal ball assembly; the sleeve (202) is threadedly connected to the rotating rod (1).

9. The device for correcting the out-of-roundness of a pipe according to claim 8, characterized in that: The sleeve (202) is a hexagonal sleeve.

10. The device for correcting the out-of-roundness of a pipe according to claim 8, characterized in that: The rotating rod (1) is marked with scale.

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