Single-wheel trolley for sleeving nodular cast iron pipe

Abstract

The utility model discloses a nodular cast iron pipe sleeved single-wheel trolley which comprises a frame plate of a U-shaped structure and a wheel shaft penetrating through the two sides of the frame plate, a single wheel is arranged on the surface of the wheel shaft in a sleeved mode, a vertical plate is vertically welded to the side, away from the single wheel, of the frame plate, and a top plate is horizontally welded to the top of the vertical plate. An adjusting rod penetrating through the top plate in a threaded mode is arranged on the top plate, an upper abutting block is connected to the bottom end of the adjusting rod, and a lower abutting block corresponding to the upper abutting block is detachably arranged on the side, away from the single wheel, of the frame plate. According to the technical scheme, in the sleeving operation of the nodular cast iron pipe, more manpower can be saved, and the sleeving process is efficient and rapid. As the single-wheel trolley is small in size, a plurality of sets of single-wheel trolleys can be used in large-caliber sleeving operation, and the weight can be shared conveniently; the single-wheel trolley is designed to be short, so that the two pipe types can be sleeved when the pipe diameters are close to each other; due to the fact that the single-wheel trolley is provided with the jacking mechanism, when the sleeving pipe is taken out, two-end operation can be avoided, and manpower resources are saved.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical tooling technology, and in particular relates to a set of ductile iron pipe wheel trolleys. Background Technology

[0002] In the transportation of finished ductile iron pipes, when customers require more than two types of pipes and the transport vehicle has a spare load, to save on transportation costs, small-diameter ductile iron pipes can be fitted inside large-diameter ductile iron pipes. Previously, trolleys were used for fitting ductile iron pipes, but traditional trolleys have many limitations: poor adaptability to pipe diameter and weight, making it difficult to distribute weight when working with large diameter pipes; removing the fitted pipes requires multiple people at both ends, which is inefficient and wastes manpower; clamping can easily cause local stress concentration on the pipe surface, damaging the pipe wall; the trolley's design is relatively tall, with weak anti-overturning ability, posing safety hazards when working with large-diameter pipes. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art by providing a single-wheeled trolley for transporting ductile iron pipes in sets. This improves adaptability to different pipe diameters and weights, simplifies the removal process, enhances pipe surface protection, and significantly improves anti-overturning ability, thereby achieving efficient, safe, and low-cost transport of ductile iron pipe sets.

[0004] To achieve the above objectives, the utility model adopts the following technical solution: a unicycle trolley for mounting ductile iron pipes, comprising a U-shaped frame plate and a wheel axle penetrating both sides of the frame plate, a unicycle wheel being fitted onto the surface of the wheel axle, a vertical plate being vertically welded to the side of the frame plate away from the unicycle wheel, and a top plate being horizontally welded to the top of the vertical plate; an adjusting rod threaded through the top plate is provided on the top plate, an upper abutment block is connected to the bottom end of the adjusting rod, and a lower abutment block corresponding to the upper abutment block is detachably provided on the side of the frame plate away from the unicycle wheel.

[0005] The above technical solution saves considerable manpower in the ductile iron pipe assembly process, making the assembly process efficient and fast. Due to the small size of the wheelbarrow, multiple sets can be used in large-diameter assembly operations, facilitating weight distribution; the wheelbarrow's low profile allows for assembly of pipes with similar diameters; and the wheelbarrow's clamping mechanism avoids working at both ends when removing the assembled pipe, saving manpower.

[0006] Optionally, the frame plate consists of a horizontally arranged cross plate and symmetrically distributed ear plates on both sides. The bottom surface of the ear plate is arc-shaped, and the side of the ear plate has through holes adapted to the wheel axle. The two ends of the wheel axle are fixed in the frame plate by locking nuts. The wheel axle is fixed by locking nuts to ensure the stability of the single wheel during operation and to avoid the safety hazards caused by the wheel axle loosening during transportation.

[0007] Optionally, the distance between the through hole and the bottom surface of the horizontal plate is greater than the distance between the through hole and the bottom surface of the ear plate, and the bottom wall of the wheel surface of the single wheel is lower than the bottom surface of the ear plate. The through hole position is designed so that the wheel surface of the single wheel is lower than the bottom surface of the ear plate, which lowers the center of gravity and improves the anti-overturning ability of the trolley, and is especially suitable for the assembly of large-diameter ductile iron pipes.

[0008] Optionally, the length of the single wheel is greater than the diameter of the single wheel, the diameters at both ends of the single wheel are smaller than the diameter at the middle of the single wheel, the wheel surface of the single wheel is arc-shaped, and the design of the diameter at the middle of the single wheel being larger than the diameters at both ends enhances the contact area with the inner wall of the ductile iron pipe. While dispersing the load pressure, it can also reduce the friction with the inner wall of the pipe, allowing the trolley to move more smoothly inside the pipe.

[0009] Optionally, a slot is provided on the upper surface of the horizontal plate, and a magnetic insert is provided at the bottom of the lower abutment block that is adapted to the slot. The height of the magnetic insert is not greater than the depth of the slot, and the side wall of the magnetic insert is in contact with the inner side wall of the slot. The quick-release design of the magnetic insert and the slot makes it easy to replace lower abutment blocks of different sizes to adapt to pipes of different outer diameters. The magnetic fixing method is convenient to operate and does not require additional tools, thus improving work efficiency.

[0010] Optionally, the bottom surface of the lower abutment block is a flat surface, and the top surface is a concave arc surface. The top surface of the lower abutment block is in contact with the outer wall of the ductile iron pipe, and the concave arc surface at the top of the lower abutment block is in contact with the outer wall of the ductile iron pipe, which increases the contact area and avoids local stress concentration during clamping, which can lead to damage to the pipe surface and meets the requirements for surface protection of ductile iron pipe.

[0011] Optionally, the bottom surface of the upper abutment block is an arc surface, which fits against the inner wall of the ductile iron. One side of the upper abutment block contacts the vertical plate. The arc surface design of the bottom surface of the upper abutment block matches the curvature of the inner wall of the pipe, forming a double clamping effect to prevent the pipe from sliding or rotating. At the same time, the structural design that contacts the vertical plate further restricts lateral displacement and ensures transportation safety.

[0012] Optionally, the top plate is provided with a screw hole adapted to the adjusting rod. The adjusting rod is a threaded rod, and an adjusting handle is provided at the top of the adjusting rod. The combination of the threaded adjusting rod and the adjusting handle provides precise pressure control. The operator can quickly adjust the clamping force to avoid damage to the pipe due to excessive tightness or detachment due to excessive looseness. It is especially suitable for ductile iron pipes with different wall thicknesses.

[0013] Optionally, the distance between the horizontal plate and the top plate is not less than 40mm, and the width of the top plate does not exceed 50mm. The distance limit between the horizontal plate and the top plate ensures that the adjusting rod has sufficient stroke to adapt to different pipe diameters. At the same time, the width limit of the top plate makes the structure compact, which is convenient for operation in narrow spaces and meets the space constraints of the ductile iron pipe construction site.

[0014] Compared with existing technologies, the advantages of this utility model are: It saves considerable manpower in the assembly of ductile iron pipes, making the assembly process efficient and fast. Due to the small size of the single-wheel trolley, multiple sets can be used in large-diameter assembly operations, facilitating weight distribution; the low profile of the single-wheel trolley allows for assembly of pipes with similar diameters; the clamping mechanism on the single-wheel trolley avoids working at both ends when removing the assembled pipe, saving manpower; 2. The through-hole design lowers the wheel surface below the ear plate, reducing the center of gravity and improving the trolley's anti-overturning ability, making it particularly suitable for assembling large-diameter ductile iron pipes; 3. The design of the single wheel's middle diameter being larger than the diameters at both ends enhances its fit with the ductile iron pipe. The increased contact area of ​​the inner wall of the pipe not only disperses the load pressure but also reduces friction with the inner wall, allowing the trolley to move more smoothly inside the pipe; 4. The concave arc surface at the top of the lower abutment block fits against the outer wall of the ductile iron pipe, increasing the contact area and preventing local stress concentration during clamping, which could lead to damage to the pipe surface and meet the surface protection requirements of ductile iron pipes. The arc surface design of the bottom of the upper abutment block matches the curvature of the inner wall of the pipe, forming a double clamping mechanism to prevent the pipe from sliding or rotating; at the same time, the structural design that contacts the vertical plate further restricts lateral displacement and ensures transportation safety. Attached Figure Description

[0015] Figure 1 A front view schematic diagram of the ductile iron pipe unicycle provided in this embodiment of the utility model;

[0016] Figure 2 A three-dimensional perspective schematic diagram of the ductile iron pipe unicycle provided for this utility model;

[0017] Figure 3 A three-dimensional schematic diagram of the initial welding state of the frame plate, the vertical plate, and the top plate provided for an embodiment of this utility model;

[0018] Figure 4 An assembly effect diagram of the ductile iron pipe unicycle and the ductile iron pipe is provided for the embodiments of this utility model.

[0019] In the diagram: 1. Frame plate; 11. Horizontal plate; 12. Ear plate; 13. Slot; 2. Axle; 21. Locking nut; 3. Single wheel; 4. Vertical plate; 5. Top plate; 6. Adjusting rod; 61. Adjusting handle; 7. Upper stop block; 8. Lower stop block; 81. Magnetic insert block. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] like Figure 1 —3 As shown in the embodiment, the specific solution is as follows: a set of ductile iron pipe single wheel 21 locking nuts; 3 trolley, including a U-shaped frame plate 1, a wheel axle 2 passing through both sides of the frame plate 1, the surface of the wheel axle 2 is fitted with a single wheel 21 locking nut; 3, the frame plate 1 is away from the single wheel 21 locking nut; a vertical plate 4 is vertically welded to one side of the frame plate 1, and a top plate 5 is horizontally welded to the top of the vertical plate 4; an adjusting rod 6 threaded through the top plate 5 is provided on the top plate 5, and an upper abutment block 7 is connected to the bottom end of the adjusting rod 6; a lower abutment block 8 corresponding to the upper abutment block 7 is detachably provided on one side of the frame plate 1 away from the single wheel 21 locking nut;

[0023] The above technical solution saves considerable manpower in the ductile iron pipe assembly process, making the assembly process efficient and fast. Due to the small size of the single-wheel 21 locking nut; 3 trolley, multiple sets can be used in large-diameter assembly operations, facilitating weight distribution. The low profile of the single-wheel 21 locking nut; 3 trolley allows for assembly of pipes with similar diameters. Furthermore, the tightening mechanism on the single-wheel 21 locking nut; 3 trolley avoids working at both ends when removing the assembled pipe, saving manpower.

[0024] In this embodiment, the frame plate 1 is composed of a horizontally arranged cross plate 11 and symmetrically distributed ear plates 12 on both sides. The bottom surface of the ear plate 12 is an arc surface, and the side of the ear plate 12 is provided with through holes that are adapted to the wheel axle 2. The two ends of the wheel axle 2 are fixed in the frame plate 1 by locking nuts. The wheel axle 2 is fixed by locking nuts to ensure the stability of the single wheel 21 during operation and to avoid the wheel axle 2 loosening during transportation, which may cause safety hazards.

[0025] In this embodiment, the distance between the through hole and the bottom surface of the horizontal plate 11 is greater than the distance between the through hole and the bottom surface of the ear plate 12, and the single wheel 21 locks the nut; the bottom wall of the wheel surface 3 is lower than the bottom surface of the ear plate 12, and the through hole position is designed to lock the nut of the single wheel 21; the wheel surface 3 is lower than the bottom surface of the ear plate 12, which lowers the center of gravity and improves the anti-overturning ability of the trolley, and is especially suitable for the assembly of large-diameter ductile iron pipes.

[0026] In this embodiment, the single wheel 21 is locked with a nut; the length of 3 is greater than that of the single wheel 21 and the nut; the diameter of 3 is equal to that of the single wheel 21 and the nut; the diameters at both ends of 3 are smaller than those of the single wheel 21 and the nut; the diameter of 3 in the middle is equal to that of the single wheel 21 and the nut; the wheel surface of 3 is arc-shaped; the design of the diameter in the middle of 3 being greater than that at both ends enhances the contact area with the inner wall of the ductile iron pipe, which can reduce the friction with the inner wall of the pipe while dispersing the load pressure, allowing the trolley to move more smoothly in the pipe.

[0027] In this embodiment, a slot 13 is provided on the upper surface of the horizontal plate 11, and a magnetic insert 81 adapted to the slot 13 is provided at the bottom of the lower abutment block 8. The height of the magnetic insert 81 does not exceed the depth of the slot 13, and the side wall of the magnetic insert 81 contacts the inner side wall of the slot 13. The quick disassembly and assembly design of the magnetic insert 81 and the slot 13 makes it convenient to replace the lower abutment block 8 of different sizes to adapt to pipes of different outer diameters. The magnetic fixing method is convenient to operate and does not require additional tools, thus improving work efficiency.

[0028] In this embodiment, the bottom surface of the lower abutment block 8 is a plane, and the top surface is a concave arc surface. The top surface of the lower abutment block 8 is in contact with the outer wall of the ductile iron pipe, and the concave arc surface at the top of the lower abutment block 8 is in contact with the outer wall of the ductile iron pipe, which increases the contact area and avoids local stress concentration during clamping, which can lead to damage to the pipe surface and meets the requirements for surface protection of ductile iron pipe.

[0029] In this embodiment, the bottom surface of the upper abutment block 7 is an arc surface, which fits against the inner wall of the ductile iron. One side of the upper abutment block 7 contacts the vertical plate 4. The arc surface design of the bottom surface of the upper abutment block 7 matches the curvature of the inner wall of the pipe, forming a double clamping inside and outside to prevent the pipe from sliding or rotating. At the same time, the structural design that contacts the vertical plate 4 further restricts lateral displacement and ensures transportation safety.

[0030] In this embodiment, the top plate 5 is provided with a screw hole that matches the adjusting rod 6. The adjusting rod 6 is a threaded rod, and the top of the adjusting rod 6 is provided with an adjusting handle 61. The combination of the threaded adjusting rod 6 and the adjusting handle 61 provides precise pressure control. The operator can quickly adjust the clamping force to avoid damaging the pipe due to excessive tightness or falling off due to excessive looseness. It is especially suitable for ductile iron pipes with different wall thicknesses.

[0031] In this embodiment, the distance between the horizontal plate 11 and the top plate 5 is not less than 40mm, and the width of the top plate 5 is not more than 50mm. The distance restriction between the horizontal plate 11 and the top plate 5 ensures that the adjusting rod 6 has sufficient stroke to adapt to different pipe diameters. At the same time, the width restriction of the top plate 5 makes the structure compact, which is convenient for operation in narrow spaces and meets the space restriction requirements of the ductile iron pipe construction site.

[0032] like Figure 4As shown, the working principle of the above embodiment is as follows: With the trolley facing the pipe end, the inner wall of the pipe is embedded between the lower abutment block 8 and the upper abutment block 7. The adjusting rod 6 is rotated to make the upper abutment block 7 fit tightly against the inner wall of the pipe. Simultaneously, the lower abutment block 8 is magnetically fixed to the horizontal plate 11, forming a stable support with the outer wall of the pipe. The single wheel 21 locks the nut; 3, which lowers the center of gravity and improves anti-overturning ability. The design of the single wheel 21 locks the nut; 3, with a diameter larger in the middle than at both ends, increases the contact area with the inner wall of the pipe, dispersing load pressure and reducing friction, ensuring smooth movement of the trolley within the pipe. Through the threaded adjustment function of the adjusting rod 6, the operator can precisely control the clamping force, avoiding damage to the pipe due to excessive tightness or detachment due to excessive looseness, especially suitable for ductile iron pipes of different wall thicknesses. The spacing design between the horizontal plate 11 and the top plate 5 ensures that the adjusting rod 6 has sufficient stroke to adapt to different pipe diameters. At the same time, the width limitation of the top plate 5 makes the structure compact, facilitating operation in narrow spaces and meeting the space constraints of the construction site. The entire device achieves efficient and stable ductile iron pipe assembly operations through double internal and external clamping and stable support of a single wheel 21 locking nut; 3.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dolly for ductile iron pipe, characterized in that: It includes a U-shaped frame plate and a wheel axle that runs through both sides of the frame plate. A single wheel is fitted on the surface of the wheel axle. A vertical plate is welded to the side of the frame plate away from the single wheel. A top plate is welded to the top of the vertical plate. An adjusting rod with a thread running through the top plate is provided on the top plate. An upper abutment block is connected to the bottom end of the adjusting rod. A lower abutment block corresponding to the upper abutment block is detachably provided on the side of the frame plate away from the single wheel.

2. The duffel bag of claim 1, wherein: The frame plate consists of a horizontally arranged cross plate and symmetrically distributed ear plates on both sides. The bottom surface of the ear plate is arc-shaped, and the side of the ear plate has through holes adapted to the wheel axle. The two ends of the wheel axle are fixed in the frame plate by locking nuts.

3. The duffel bag of claim 2, wherein: The distance between the through hole and the bottom surface of the horizontal plate is greater than the distance between the through hole and the bottom surface of the ear plate, and the bottom wall of the wheel surface of the single wheel is lower than the bottom surface of the ear plate.

4. The duffel bag of claim 1, wherein: The length of the unicycle is greater than its diameter, the diameters at both ends of the unicycle are smaller than the diameter at the middle of the unicycle, and the surface of the unicycle is curved.

5. The duffel bag of claim 2, wherein: The upper surface of the horizontal plate is provided with a slot, and the bottom of the lower abutment block is provided with a magnetic insert that is adapted to the slot. The height of the magnetic insert does not exceed the depth of the slot, and the side wall of the magnetic insert contacts the inner side wall of the slot.

6. The duffel bag of claim 1, wherein: The bottom surface of the lower abutment block is a flat surface, and the top surface is a concave arc surface. The top surface of the lower abutment block is in contact with the outer wall of the ductile iron.

7. The duffel bag of claim 1, wherein: The bottom surface of the upper abutment block is curved, and the bottom surface of the upper abutment block is in contact with the inner wall of the ductile iron. One side of the upper abutment block is in contact with the vertical plate.

8. The duffel bag of claim 2, wherein: The top plate has a screw hole that matches the adjusting rod. The adjusting rod is a threaded rod, and an adjusting handle is provided at the top of the adjusting rod.

9. The duffel bag of claim 2, wherein: The distance between the horizontal plate and the top plate shall not be less than 40mm, and the width of the top plate shall not exceed 50mm.

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