CN212821958U - Pipe bending tool - Google Patents

Abstract

The utility model relates to a pipe bending tool capable of bending a tubular structure, which comprises an operation part and a hand-held part; the operating part is arranged on the handheld part; the operating part comprises a first plate-shaped piece and a second plate-shaped piece which are oppositely arranged, and a gap for the tubular piece to extend into when the pipe is bent is defined between two opposite surfaces of the first plate-shaped piece and the second plate-shaped piece; at least one of the first plate and the second plate is configured in an annular configuration. Through set up the operation portion in handheld portion, when the tubulose spare of needs buckling, stretch into the tubulose spare in the clearance between the first platelike spare of operation portion and the second platelike spare, rotatory handheld portion can be crooked with the tubulose spare, and staff's singlehanded can be crooked the tubulose spare, easy operation, convenience.

Description

Pipe bending tool

Technical Field

The utility model relates to an instrument that maintainer of industrial and mining enterprise used when carrying out equipment maintenance especially relates to a pipe bending tool that can carry out the bending to tubular structure.

Background

In many enterprises, for example, petrochemical enterprises, electrical equipment and instrument maintenance workers are responsible for a large amount of electrical equipment and instrument maintenance, and need to frequently inspect, maintain, install and the like electrical equipment on a construction site, so that the maintenance can be carried out at any time, and what the maintenance workers cannot lack is a maintenance tool.

When a wire rod, such as a metal pipe, needs to be bent, a pipe bending tool needs to be used for applying a certain acting force to the metal pipe so as to bend the metal pipe to a required radian. The existing pipe bending tool comprises two handles, wherein the two handles are respectively connected with a pressing plate and a guide groove, the guide groove is in an outward convex arc shape, a metal pipe is fixed in the guide groove during use, the two handles are respectively held by two hands and are slowly pressed, a pressing block moves towards the guide groove, the metal pipe is bent in the process of movement of the pressing block, and the radian of the metal pipe is matched with that of the guide groove.

However, most of the existing pipe bending tools are too heavy, and are inconvenient to operate for small-sized metal pipes, so that the bending radian error caused by inconvenient operation is easily caused.

SUMMERY OF THE UTILITY MODEL

The bending tool aims to solve the problems that most of the existing pipe bending tools are too heavy, the small-sized pipes are inconvenient to operate, and the bending radian error caused by inconvenient operation is easy to cause.

The utility model provides a pipe bending tool, which comprises an operation part and a hand-held part; the operating part is arranged on the handheld part; the operating part comprises a first plate-shaped piece and a second plate-shaped piece which are oppositely arranged, and a gap for the tubular piece to extend into when the pipe is bent is defined between two opposite surfaces of the first plate-shaped piece and the second plate-shaped piece; at least one of the first plate and the second plate is configured in a ring-like configuration.

In an alternative embodiment of the above pipe bending tool, the first plate-like member is formed as a straight plate-like structure and the second plate-like member is formed as a closed ring-like structure.

In an alternative embodiment of the above pipe bending tool, the second plate-like member is formed as a closed annular ring-like structure.

In an alternative embodiment of the above pipe bending tool, the hand-held portion is formed as a flat sheet-like structure, and the operation portion is provided on one of two surfaces of the flat sheet-like structure extending in the longitudinal direction.

In an alternative embodiment of the pipe bending tool, the operation portion is provided at an end portion of the flat sheet-like structure, and the straight plate-like structure is formed by bending the end portion of the flat sheet-like structure.

In an alternative embodiment of the above pipe bending tool, the flat sheet structure is provided with a polygonal hole for nut removal, the axis of the polygonal hole extending in the thickness direction of the flat sheet structure.

In an alternative embodiment of the above pipe bending tool, the flat sheet-like structure is provided with a plurality of polygonal holes having different sizes.

In an alternative embodiment of the pipe bending tool described above, the long side of the flat sheet-like structure is further provided with a rectangular groove for retaining a portion of the valve handwheel.

In an alternative embodiment of the above pipe bending tool, the rectangular groove is a plurality of grooves, and all of the rectangular grooves have different lengths.

In an alternative embodiment of the above pipe bending tool, the plurality of rectangular grooves are provided on two long sides of the flat sheet-like structure.

The utility model provides a pipe bending tool, including operation portion and handheld portion, the operation portion sets up on handheld portion, and the operation portion includes relative first plate-like spare and the second plate-like spare that sets up again, and the relative two surfaces of first plate-like spare and second plate-like spare supply the clearance that the tubulose stretched into when injecing the return bend, and first plate-like spare and second plate-like spare at least one are configured into curved annular structure. Through set up the operation portion in handheld portion, when the tubulose spare of needs buckling, only need stretch into the tubulose spare in the clearance between the first platelike spare of operation portion and the second platelike spare, rotatory handheld portion can be crooked with the tubulose spare, and staff's singlehanded can be crooked tubulose spare, easy operation, convenience.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a pipe bending tool according to an embodiment of the present invention;

FIG. 2 is a schematic view of the pipe bending tool provided in FIG. 1 bending a tubular member;

fig. 3 is a schematic structural diagram of another pipe bending tool according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a pipe bending tool according to a second embodiment of the present invention;

FIG. 5 is a schematic view of the nut of the pipe bending tool shown in FIG. 4;

fig. 6 is a schematic structural diagram of a pipe bending tool according to a third embodiment of the present invention;

fig. 7 is a schematic view of the pipe bending tool provided in fig. 6 holding a valve hand wheel.

Description of reference numerals:

1-a pipe bending tool;

11-an operating part;

111-a first plate-like member;

112-a second plate-like member;

12-a hand-held portion;

13-polygonal holes;

14-a rectangular groove;

2-a tubular member;

3-a nut;

4-valve hand wheel.

Detailed Description

First of all, it should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications.

Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that a device or member must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

When electrical apparatus, instrument maintenance workman are when crooked metal tubular product, because the general diameter of metal tubular product on electrical apparatus, the instrument is all not big, and current pipe bending tool is too heavy again, uses the inconvenient operation of the metal tubular product of current pipe bending tool bending small-size, has reduced work efficiency and arouses the crooked radian error because of the operation is inconvenient easily.

The inventor has found that it would be particularly advantageous for a service worker to work if a tool like a wrench could be used to form a tubular member capable of bending a small pipe diameter. In view of the above, the inventor configures the operation portion with the bending gap on the handle portion similar to the wrench, so that when the tubular member needs to be bent, a part of the tubular member can pass through the gap of the operation portion, and then the handle portion is rotated to achieve the purpose of bending the tubular member, which is simple and convenient to operate.

Example one

Fig. 1 is a schematic structural diagram of a pipe bending tool according to this embodiment, and fig. 2 is a schematic diagram of a pipe bending tool bending a tubular member according to fig. 1. As shown in fig. 1-2, the pipe bending tool 1 includes an operation portion 11 and a hand-held portion 12, and the hand-held portion 12 is a flat sheet structure, specifically, the hand-held portion 12 is a rectangular sheet structure. It should be noted that the longer the length of the hand-held portion 12 is, the longer the moment arm when the worker bends the tubular member 2 while holding the hand-held portion 12 is, and the more labor is saved when bending the tubular member 2. The size of the hand-held portion 12 is not limited in the present embodiment, and for example, a rectangular plate with a length of 240mm, a width of 40mm and a thickness of 4mm may be adopted as the hand-held portion 12, and of course, a rectangular plate with a suitable size may be selected as the hand-held portion 12 by those skilled in the art according to actual needs.

In order to ensure that the handle 12 is not easily deformed during long-term use, the handle 12 may be made of cast iron, and of course, workers in the field may select other materials for making the handle 12 as long as the materials ensure that the handle 12 is not easily deformed during long-term use of the pipe bending tool 1.

Through setting up handheld portion 12, make things convenient for handheld bending tool 1 of staff, when the staff uses 1 crooked tubulose parts 2 of bending tool, provide an arm of force, need not use very big power can be crooked the radian that becomes needs with tubulose parts 2 when the staff uses 1 bending tool 2 of bending tool.

As shown in fig. 1, the handle portion 12 is provided with an operation portion 11, and the operation portion 11 is provided on one of two surfaces of the handle portion 12 of the flat sheet-like structure extending in the longitudinal direction. Various connection modes can be adopted between the operating part 11 and the handheld part 12, and the operating part 11 and the handheld part 12 are connected by welding. The operating portion 11 is used to fix the tubular member 2 and apply a force to the tubular member 2 to bend the tubular member 2 during rotation of the hand-held portion 12.

It will be readily appreciated that the position of the operating portion 11 relative to the handle portion 12 is non-limiting and may be located at the end, middle or near the end of the handle portion 12. The operator in the field can set the operation part 11 at a suitable position of the hand-held part 12 according to the actual needs.

Preferably, the operation part 11 is arranged at the end of the handheld part 12 shown in fig. 1, so that when a worker bends the tubular member 2 by using the pipe bending tool 1, the worker bends the tubular member 2 with the most labor saving compared with the case that the operation part 11 is arranged at the other position of the handheld part 12 and the moment arm is the longest.

As shown in fig. 1, the operation portion 11 includes a first plate-like member 111 and a second plate-like member 112, which are oppositely disposed, the first plate-like member 111 and the second plate-like member 112 are respectively fastened to the handheld portion 12, and for example, the first plate-like member 111 and the handheld portion 12 and the second plate-like member 112 and the handheld portion 12 may be connected by welding. A gap for extending into the tubular member 2 is provided between the first plate-like member 111 and the second plate-like member 112, which gap may range between 8.1-8.5 mm. By setting the gap between the first plate-like member 111 and the second plate-like member 112 to be in the range of 8.1 to 8.5mm, the bending tool 1 can bend two different types of tubular members 2 of Φ 6 and Φ 8, that is, the gap between the first plate-like member 111 and the second plate-like member 112 is slightly larger than the diameter of the tubular member 2, and the two different types of tubular members 2 having the diameter of 6 or 8mm can be bent by using the bending tool 1. It will be readily understood that the gap between the first plate-like member 111 and the second plate-like member 112 is not limited, and if a tube member 2 with a smaller bending diameter is required, the gap between the first plate-like member 111 and the second plate-like member 112 can be set to be correspondingly smaller by those skilled in the art, and similarly, if a tube member 2 with a larger bending diameter is required, the gap between the first plate-like member 111 and the second plate-like member 112 can be correspondingly set to be larger by those skilled in the art.

By setting the gap between the first plate-like member 111 and the second plate-like member 112 to be slightly larger than the diameter of the tubular member 2, when the pipe bending tool 1 is used for bending the tubular member 2, the tubular member 2 is not bent in a laborious manner due to excessive friction between the first plate-like member 111 and/or the second plate-like member 112 and the tubular member 2.

At least one of the first plate-like member 111 and the second plate-like member 112 is configured in an arc-shaped annular structure, that is, the first plate-like member 111 is configured in an arc-shaped annular structure, or the second plate-like member 112 is configured in an arc-shaped annular structure, or both the first plate-like member 111 and the second plate-like member 112 are disposed in an arc-shaped annular structure. When a worker bends the tubular member 2 using the pipe bending tool 1, the tubular member 2 is bent toward the side of the plate-like member arranged in an arc-shaped annular structure. It should be noted that the ring structure may be closed or semi-closed, and of course, the semi-closure may be 1/4 closure, 1/2 closure, and the like.

In some realizations, as shown in fig. 1, the first plate-like member 111 is formed in a straight plate-like structure, the first plate-like member 111 is perpendicular to the handheld portion 12, the width of the first plate-like member 111 may be equal to or different from the width of the handheld portion 12, the width of the first plate-like member 111 is not limited in this embodiment, and a worker in the art may set the first plate-like member 111 to an appropriate width according to actual needs.

Preferably, the first plate-like member 111 has a width equal to that of the handheld portion 12 and is located at the end of the handheld portion 12, that is, the first plate-like member 111 is located at the left end of the handheld portion 12 as shown in fig. 1, and the first plate-like member 111 can be directly formed by bending the handheld portion 12. By bending the rectangular sheet material into the first plate-like member 111 and the hand-held portion 12, not only the stability of the connection between the first plate-like member 111 and the hand-held portion 12 is ensured, but also the processing is easy.

With continued reference to fig. 1, the second plate 112 is disposed near the end of the hand grip 12, i.e., the second plate 12 is disposed near the left end in fig. 1. The second plate-like member 112 is formed in a closed ring-like structure and the second plate-like member 112 is disposed vertically as in the hand-held portion 12. The closed ring structure is to be understood in a broad sense, i.e. the radial cross section of the second plate-like member 112 may be circular or elliptical. The second plate 112 and the handle 12 can be connected in various ways, and the second plate 112 and the handle 12 are connected by welding.

Preferably, the second plate 112 is formed in a closed ring-shaped structure, that is, the radial section of the second plate 12 is circular. Illustratively, if two different types of tubular members 2 of Φ 6 and Φ 8 are to be bent, DN25 pipe, i.e., 25mm nominal diameter pipe, may be used as the second plate-like member 112, while setting the gap between the first plate-like member 111 and the second plate-like member 112 within a range of 8.1 to 8.5 mm. It is easily understood that if other types of tubular members 2 need to be bent, one skilled in the art can correspondingly increase or decrease the diameter of the annular structure formed by the second plate-like member 112, and correspondingly adjust the gap between the first plate-like member 111 and the second plate-like member 112. In this embodiment, the diameter of the annular structure formed by the second plate-like member 112 is not limited, and the curvature of the tubular member 2 is ensured to be between 10 times and 20 times of the diameter of the annular structure, which can be adjusted by workers in the field according to actual needs. By using a tube as the second plate-like member 112, not only is the second plate-like member 112 raw material easily available, but it is also easier to control the bending radius when bending the tubular member 2 using the pipe bending tool 1.

In other implementations, the first plate-like member 111 at the end of the handheld portion 12 is configured as an arc-shaped ring structure, the second plate-like member 112 adjacent to the first plate-like member 111 is configured as a straight plate structure, and when the pipe bending tool 1 is used to bend the tubular member 2, the worker rotates the handheld portion 12 around the first plate-like member 111 to bend the tubular member 2 located between the first plate-like member 111 and the second plate-like member 112.

The second plate-shaped member 112 is configured as an arc-shaped ring structure, but the protection scope is not particularly limited, and the first plate-shaped member 111 may be configured as a ring structure by those skilled in the art.

Fig. 3 is a schematic structural diagram of another pipe bending tool 1 provided in this embodiment. As shown in fig. 3, in some realizations, polygonal hole grooves are arranged on the inner side of the closed ring structure formed by the second plate-shaped member 112, the axes of the polygonal hole 13 grooves are parallel to the axis of the closed ring structure formed by the second plate-shaped member 112, the radial section of the polygonal hole 13 grooves can be hexagonal or twelve-deformed, and the polygonal hole 13 grooves can be used for dismounting and mounting the nut 3. The radial cross-sectional size of the slot of the polygonal hole 13 is not limited in this embodiment, and those skilled in the art can set the size of the slot of the polygonal hole 13 matching the direction of the nut 3 according to the specification of the nut 3 to be adjusted.

The pipe bending process of the pipe bending tool 1 is briefly described below with reference to fig. 2, so that those skilled in the art can better understand the solution of the present embodiment.

The tubular member 2 is inserted into the gap between the first plate-shaped member 111 and the second plate-shaped member 112, the worker holds the hand-holding part 12 to rotate around the second plate-shaped member 112, the first plate-shaped member 111 and the second plate-shaped member 112 jointly apply acting force to the tubular member 2 in the rotating process, the tubular member 2 is bent around the second plate-shaped member 112, and the bending radian of the tubular member 2 is controlled by the rotating angle of the hand-holding part 12.

It is easy to think that the pipe bending tool 1 provided by the present embodiment is also suitable for manufacturing small-sized articles for daily use, for example, a metal wire may be bent into a clothes hanger by using the pipe bending tool 1 provided by the present embodiment a plurality of times, or a metal wire may be bent into a metal hook by using the pipe bending tool 1.

In conclusion, the pipe bending tool 1 provided by the embodiment has a simple structure and a small volume, is convenient to operate in the process of bending the tubular member 2, and can be used for bending the tubular member 2 by a single hand of a worker. The gap between the first plate-like member 111 and the second plate-like member 112 is slightly larger than the diameter of the tubular member 2, so as to reduce the influence of friction on bending the tubular member 2.

Example two

Fig. 4 is a schematic structural diagram of a pipe bending tool according to the present embodiment, and fig. 5 is a schematic diagram of a nut of the pipe bending tool shown in fig. 4. As shown in fig. 4-5, on the basis of the first embodiment, the pipe bending tool 1 provided in this embodiment is further provided with a polygonal hole 13 for attaching and detaching the nut 3. The polygonal hole 13 may be provided at a plurality of positions on the hand grip 12. Exemplarily, as shown in fig. 4, a polygonal hole 13 is provided to the right side of the hand-held portion 12. The position of the polygonal hole 13 on the handheld portion 12 is not limited in this embodiment, and it may be located on the right side of the handheld portion 12, i.e. on the side away from the operation portion 11, or on the left side of the handheld portion 12, and of course, it may also be located in the middle of the handheld portion 12, and a person skilled in the art may set the specific position of the polygonal hole 13 on the handheld portion 12 according to actual needs.

It will be readily appreciated that the cross-sectional shape of the polygonal hole 13 is not limited and may be hexagonal or dodecagonal, although other suitable shapes are possible. In this embodiment, the shape of the polygonal hole 13 is not limited, and a worker in the art can set the specific shape of the polygonal hole 13 by himself, as long as the polygonal hole 13 can drive the nut 3 to rotate together in the rotating process.

With continued reference to fig. 4-5, the axis of the polygonal hole 13 extends in the thickness direction of the hand grip 12. When the nut 3 is disassembled and assembled by using the pipe bending tool 1, the handheld part 12 is vertical to the axis of the nut 3, and the worker can disassemble and assemble the nut 3 by only sleeving the polygonal hole 13 on the side wall of the nut 3 and rotating the handheld part 12 around the axis of the nut 3 when the worker uses the pipe bending tool 1 to disassemble and assemble the nut 3.

It will be readily appreciated that the number of polygonal holes 13 may be plural, and that a plurality of polygonal holes 13 may be arranged in various ways on the hand-held portion 12. The number and arrangement of the polygonal holes 13 are not limited in this embodiment, and may be two or three, and the polygonal holes 13 may be arranged in a straight line or in a circular array on the hand-held portion 12, and those skilled in the art can set the polygonal holes according to actual needs.

In some realizations, as shown in fig. 4, polygonal holes 13 are provided on the side of the hand-held portion 12 away from the operating portion 11, the number of polygonal holes 13 is two, and two polygonal holes 13 are arranged in the width direction of the hand-held portion 12, that is, in the up-down direction in fig. 4. The two polygonal holes 13 may be equal or different in size, and the polygonal hole 13 located at the upper side in fig. 4 is larger, for example. By providing a plurality of different sized polygonal holes 13 in the handle 12, different sizes of nuts 3 can be adjusted, illustratively, two larger polygonal holes 13 can be sized to match the M6 nut for removal of the M6 nut, and two smaller polygonal holes 13 can be sized to match the M5 nut for removal of the M5 nut. In this embodiment, the size of the polygonal hole 13 is not limited, and a person skilled in the art may set the size of the polygonal hole 13 according to the size of the nut 3 to be attached and detached.

As shown in fig. 5, in the process of using the pipe bending tool 1 to disassemble and assemble the nut 3, the worker sleeves the polygonal hole 13 on the nut 3, uses the axis of the nut 3 as a rotation axis, holds the handheld portion 12 to rotate around the rotation axis, and drives the nut 3 located in the polygonal hole 13 to synchronously rotate through the forward rotation or the reverse rotation of the handheld portion 12, thereby realizing the disassembly and assembly of the nut 3.

To sum up, the polygonal hole 13 for dismounting the nut 3 is arranged on the handheld part 12, so that the pipe bending tool 1 has the functions of bending a pipe and dismounting the nut 3, and the number of tools carried by maintenance workers is reduced. In addition, the plurality of polygonal holes 13 with different sizes are formed in the handheld portion 12, so that the pipe bending device can disassemble and assemble nuts 3 with different models and specifications, the use of a complete set of socket wrench is avoided, a socket handle is required to be carried, the socket wrench with different specifications is required to be carried, and the risk of safety accidents is caused due to the fact that the socket wrench is easy to fall and slide in high-risk operation.

EXAMPLE III

Fig. 6 is a schematic structural view of the pipe bending tool provided in this embodiment, and fig. 7 is a schematic view of the pipe bending tool provided in fig. 6 clamping a valve hand wheel. As shown in fig. 6 to 7, in addition to the above-mentioned embodiments, a rectangular groove 14 for holding a part of the valve hand wheel 4 is further provided on the long side of the flat-shaped hand-held portion 12, and specifically, the rectangular groove 14 holds a part of the outer ring of the valve hand wheel 4. The rectangular slot 14 may be made open directly to the long side of the handle 12.

The long edge of the flat handheld part 12 is provided with the rectangular groove 14, so that the pipe bending tool 1 further increases the function of clamping the valve hand wheel 4 to open and close the valve. Further reducing the number of tools that maintenance workers carry with them.

It is to be understood that the number of the rectangular grooves 14 is not limited, and may be one or more, and when the number of the rectangular grooves 14 is plural, the lengths of the plural rectangular grooves 14 may be equal or different.

Illustratively, as shown in fig. 6, the number of the rectangular grooves 14 is two, and the two rectangular grooves 14 have different sizes and are used for clamping valve handwheels 4 with different specifications. For the specific size of the two rectangular grooves 14, the embodiment is not limited, and workers in the field can set the rectangular grooves 14 of corresponding size according to the specific specification of the valve hand wheel 4 to be clamped.

The valve hand wheels 4 with different models can be clamped by setting the rectangular grooves 14 to be different in size, so that the universality of the pipe bending tool 1 is improved.

The arrangement of the plurality of rectangular slots 14 on the handle 12 of the flat sheet-like structure is also not limited, and for example, the plurality of rectangular slots 14 may be disposed on one long side of the flat sheet-like structure, or the plurality of rectangular slots 14 may be disposed on two long sides of the flat sheet-like structure as shown in fig. 6.

The process of opening and closing the valve using the pipe bending tool 1 will be briefly described below with reference to fig. 7 so that those skilled in the art can better understand the solution of the present embodiment.

As shown in fig. 7, a plurality of rectangular grooves 14 with different sizes are formed in a handheld portion 12 of a flat sheet structure, a hand wheel of the valve is clamped by the rectangular grooves 14 with suitable sizes, a worker rotates the handheld portion 12 to enable a pipe bending tool 1 to rotate around the axis of the valve hand wheel 4, strength of the hand of the worker is transmitted to the valve hand wheel 4 by the aid of the lever principle, and therefore the valve hand wheel 4 rotates to be opened and closed.

In summary, the pipe bending tool 1 provided in this embodiment has the rectangular groove 14 disposed on the long side of the flat sheet structure for holding the valve handle 4, so that the pipe bending tool 1 has the functions of holding the valve handle 4 and opening and closing the valve, in addition to the functions of bending the tubular member 2 and disassembling and assembling the nut 3. Further reducing the number of tools carried by maintenance workers and more conveniently maintaining instrument equipment in production. Meanwhile, the plurality of rectangular grooves 14 with different sizes are formed in the handheld portion 12 of the pipe bending tool 1, so that valve hand wheels 4 with different types can be clamped, the universality is high, and the valve opening and closing tools with different sizes are prevented from being configured according to the sizes of the valve hand wheels 4.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. A pipe bending tool is characterized by comprising an operation part and a handheld part;

the operating part is arranged on the handheld part;

the operating part comprises a first plate-shaped piece and a second plate-shaped piece which are oppositely arranged, and a gap for the tubular piece to extend into when the pipe is bent is defined between two opposite surfaces of the first plate-shaped piece and the second plate-shaped piece;

at least one of the first plate and the second plate is configured in a ring-like configuration.

2. A pipe bending tool as claimed in claim 1, wherein said first plate-like member is formed as a straight plate-like structure and said second plate-like member is formed as a closed loop-like structure.

3. A pipe bending tool according to claim 2, wherein said second plate-like member is formed as a closed loop annular ring-like structure.

4. A pipe bending tool according to claim 2, wherein the hand-held portion is formed as a flat plate-like structure, and the operation portion is provided on one of two surfaces of the flat plate-like structure extending in a longitudinal direction.

5. A pipe bending tool according to claim 4, wherein the operating portion is provided at an end portion of the flat sheet-like structure, and the straight plate-like structure is formed by bending the end portion of the flat sheet-like structure.

6. A pipe bending tool according to claim 4, wherein the flat sheet structure is provided with a polygonal hole for attaching and detaching a nut, an axis of the polygonal hole extending in a thickness direction of the flat sheet structure.

7. A tool for pipe bending according to claim 6, wherein said flat sheet like structure is provided with a plurality of polygonal apertures having different sizes.

8. A pipe bending tool according to claim 4 or 6, wherein the long side of the flat sheet like structure is further provided with a rectangular slot for retaining a portion of the valve hand wheel.

9. The pipe bending tool according to claim 8, wherein the rectangular groove is plural, and all of the rectangular grooves have different lengths.

10. A tool for pipe bending according to claim 9, wherein a plurality of said rectangular slots are provided on two long sides of said flat sheet-like structure.

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