A pipe bender for floor heating pipe pressure test

Abstract

The application relates to the technical field of pipe bending, and discloses a pipe bender for pressing test of a floor heating pipe, which comprises a base, a bending die and a rotating wheel. The base has opposite first and second mounting surfaces along the thickness direction of the base. The bending die is detachably mounted on the first mounting surface of the base, and the outer contour of the bending die is provided with a bending groove along the circumferential direction of the bending die. The rotating wheel is located on the side of the bending die provided with the bending groove, and a passing space is defined between the rotating wheel and the outer contour of the bending die. The rotating wheel can move along the extension direction of the bending groove relative to the base, so that the floor heating pipe in the passing space is pressed into the bending groove to realize bending. The floor heating pipe is pressed into the bending groove by gradually applying pressure through the moving rotating wheel, and the inner wall of the bending groove is in full contact with the bending inner side of the floor heating pipe, so that wrinkles or contact gaps are prevented from occurring on the inner side of the floor heating pipe. The rotating wheel is always in contact with the outer side of the pipe material, and uniform movement is used to ensure that the outer side is subjected to stable force, so that stress concentration is reduced, and the pipe wall is prevented from being thinned or locally flattened.

Description

Technical Field

[0001] This application relates to the field of pipe bending technology, and in particular to a pipe bender for pressure testing of underfloor heating pipes. Background Technology

[0002] With the development of building heating technology, underfloor heating pipes have been widely used in heating systems due to their unique material properties. To ensure excellent performance during use, bending tests are necessary. However, when the pipe is bent, the inner side of the bend experiences compressive stress, while the outer side experiences tensile stress, resulting in a significant reduction in the outer wall thickness. This uneven stress distribution directly affects the structural stability of the pipe, making it prone to problems such as localized flattening, stress imbalance, and elastic rebound during pressure testing in a bent state. This is particularly evident in the poor fit between the inner side of the bend and the mold, and uneven bending angles. These defects severely affect the accuracy of pressure resistance test results and may lead to misjudgments of the pipe's actual load-bearing capacity. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a pipe bender for pressure testing of underfloor heating pipes.

[0004] This application provides a pipe bender for pressure testing of underfloor heating pipes, comprising: The base has a first mounting surface and a second mounting surface that are opposite each other along its own thickness direction; A bending die is detachably mounted on a first mounting surface of the base. The outer contour of the bending die is provided with a bending groove along its circumference, the bending groove being used to accommodate the underfloor heating pipe to be bent. A rotating wheel is located on one side of the bending mold where the bending groove is provided, and defines a passage space with the outer contour of the bending mold. The rotating wheel can move relative to the base along the extension direction of the bending groove to press the underfloor heating pipe in the passage space into the bending groove to achieve bending.

[0005] In one embodiment, the pipe bender for pressure testing of underfloor heating pipes further includes a plurality of limiting rings, which are spaced apart along the extension direction of the bending groove and are detachably connected to the bending mold, with the arc-shaped opening of the limiting ring facing the bending groove.

[0006] In one embodiment, the wheel includes an axle and wheel bodies located at both ends of the axle, with the outer peripheral surfaces of the two wheel bodies contacting the outer contour of the bending mold.

[0007] In one embodiment, the pipe bender for pressure testing of underfloor heating pipes further includes a handle and a connector connected to one end of the handle near the base. The connector includes two horizontal plates and a vertical plate located at one end of the two horizontal plates. The two ends of the vertical plate are respectively fixedly connected to one end of the two horizontal plates to form a storage groove that extends toward the bending mold and has an opening. The vertical plate is connected to the end of the handle near the base. One end of one of the horizontal plates is rotatably connected to the second mounting surface of the base. The axle of the rotating wheel passes through the storage groove, and the two wheel bodies of the rotating wheel are rotatably connected to the upper inner wall and lower inner wall of the storage groove along the thickness direction of the base, respectively; the wheel body part of the rotating wheel extends out from the opening and contacts the outer contour of the bending mold, and the base is provided with a guide groove extending along the bending groove direction.

[0008] In one embodiment, it further includes a locking pin and a locking head. Both of the horizontal plates are provided with mounting holes. The rotating wheel is provided with a through hole along the thickness direction of the base. The locking pin passes through the mounting hole and the through hole from top to bottom. The locking head is threaded to the lower end of the locking pin and is used to lock or release the rotating wheel.

[0009] In one embodiment, a grip head is fitted onto the end of the handle away from the base.

[0010] In one embodiment, a snap-fit ​​post is provided on the first mounting surface along the thickness direction of the base, and a snap-fit ​​cavity adapted to the snap-fit ​​post is provided in the middle of the bending mold.

[0011] In one embodiment, the two opposite sides of the snap-fit ​​post are provided with limiting protrusions, and the snap-fit ​​cavity is recessed in the cavity wall corresponding to the limiting protrusions to form a limiting groove; when the snap-fit ​​post extends into the snap-fit ​​cavity, the limiting protrusion is inserted into the limiting groove to restrict the rotation of the bending mold.

[0012] In one embodiment, the base has a fixing part extending along its thickness direction, and the fixing part has a plurality of fixing holes for fixing connection with an external fixing surface.

[0013] In one embodiment, the upper and lower surfaces of the outer contour of the bending mold are provided with spaced-apart openings, which are connected to the bending groove.

[0014] The technical solutions provided in this application have the following advantages compared with the prior art: By installing a bending mold on the base and setting a bending groove along the circumferential direction on the outer contour of the bending mold, and then placing a rotating wheel on the side of the bending mold with the bending groove, the underfloor heating pipe to be bent is inserted into the passage space. This allows the rotating wheel to move along the extension direction of the bending groove. Since the rotating wheel is always in contact with the outer surface of the underfloor heating pipe, it will rotate during the movement to apply pressure to the underfloor heating pipe in the direction of the bending groove. As the rotating wheel continues to move, it will gradually press the underfloor heating pipe into the bending groove. The inner wall of the bending groove will fit the inner side of the underfloor heating pipe throughout the bending process, preventing wrinkles or gaps from appearing on the inner side of the underfloor heating pipe. Meanwhile, the rotating wheel always fits the outer side of the pipe, ensuring stable force on the outer side through uniform movement, reducing stress concentration that could lead to thinning of the pipe wall or local flattening. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] In the attached image: Figure 1 This is a schematic diagram of the structure of a pipe bender used for pressure testing of underfloor heating pipes according to this application; Figure 2 This is an exploded schematic diagram of a pipe bender used for pressure testing of underfloor heating pipes according to this application; Figure 3 This is a schematic diagram of the bending die in a pipe bender used for pressure testing of underfloor heating pipes according to this application; Figure 4 This is a schematic diagram of the rotating wheel in a pipe bender used for pressure testing of underfloor heating pipes according to this application.

[0018] Icon labels: 10. Base; 10a. Guide groove; 10b. Fixing part; 11. First mounting surface; 12. Second mounting surface; 20. Bending mold; 20a. Bending groove; 20b. Hollowed-out opening; 30. Rotary wheel; 31. Wheel axle; 31a. Through hole; 32. Wheel body; 40. Limiting ring; 50. Handle; 60. Connector; 60. Storage groove; 61. Horizontal plate; 62. Vertical plate; 70. Locking post; 80. Grip head; 90. Snap-fit ​​post; 90a. Limiting protrusion; 100. Curvature scale line; 200. Scale pointer. Detailed Implementation

[0019] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0020] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0022] Please refer to Figures 1 to 4 This application provides a pipe bender for pressure testing of underfloor heating pipes. The pipe bender for pressure testing of underfloor heating pipes includes a base, a bending die 20 mounted on the base, and a rotating wheel 30 that can move relative to the base.

[0023] To facilitate the description of the positional relationship between the components, a first mounting surface 11 and a second mounting surface 12 are defined on the base, that is, along the thickness direction of the base (refer to...). Figure 1(in the X direction) has a first mounting surface 11 and a second mounting surface 12.

[0024] The bending die 20 is detachably mounted on the first mounting surface 11 of the base. The outer contour of the bending die 20 has a bending groove 20a along its circumference, which is used to accommodate the underfloor heating pipe to be bent. The rotating wheel 30 is located on the side of the bending die 20 with the bending groove 20a and defines a passage space with the outer contour of the bending die 20, so that the pipe to be bent can pass through the passage space. At this time, the pipe is located between the bending die 20 and the rotating wheel 30. Then, the rotating wheel 30 is driven to move relative to the base along the extension direction of the bending groove 20a, thereby pressing the underfloor heating pipe located in the passage space into the bending groove 20a to achieve bending. In other words, when a bending test is required on the underfloor heating pipe, the underfloor heating pipe is first inserted into the passage space, and then the rotating wheel 30 is driven to move along the extension direction of the bending groove 20a. Since the rotating wheel 30 is in contact with the outer surface of the underfloor heating pipe, the rotating wheel 30 applies pressure to the underfloor heating pipe pointing towards the bending groove 20a during the movement. As the rotating wheel 30 continues to move, the applied pressure will gradually press the underfloor heating pipe into the bending groove 20a, thereby completing the bending operation of the underfloor heating pipe.

[0025] It should be noted that the rotating wheel 30 can be moved manually or by a power unit, depending on the requirements. In this embodiment, manual driving is used, and the specific manual driving structure is described in the following embodiment.

[0026] Furthermore, since the bending mold 20 is detachably installed on the first mounting surface 11 of the base, when bending underfloor heating pipes of different specifications or different bending angles as needed, it is only necessary to remove the original bending mold 20 from the base 10 and replace it with the corresponding bending mold 20 and reinstall it on the base 10. This satisfies the bending requirements of underfloor heating pipes of different specifications or different bending angles, realizes the adaptation of diverse bending needs, simplifies the operation steps and reduces equipment replacement costs.

[0027] In summary, the bending device of this application installs a bending mold 20 on the base 10 and sets a bending groove 20a along the circumferential direction on the outer contour of the bending mold 20. Then, a rotating wheel 30 is set on the side of the bending mold 20 with the bending groove 20a. This allows the underfloor heating pipe to be bent to be inserted into the passage space, and drive the rotating wheel 30 to move along the extension direction of the bending groove 20a. Since the rotating wheel 30 is always in contact with the outer surface of the underfloor heating pipe, the rotating wheel 30 will rotate during the movement to apply pressure to the underfloor heating pipe pointing towards the bending groove 20a. As the rotating wheel 30 continues to move, it will gradually press the underfloor heating pipe into the bending groove 20a. The inner wall of the bending groove 20a will fit the inner side of the underfloor heating pipe throughout the bending process, preventing wrinkles or gaps on the inner side of the underfloor heating pipe. Meanwhile, the rotating wheel 30 always fits the outer side of the underfloor heating pipe, and the uniform movement ensures that the outer side is subjected to stable force, reducing stress concentration that could lead to thinning of the pipe wall or local flattening.

[0028] In one embodiment, the pipe bender used for pressure testing of underfloor heating pipes further includes multiple limiting rings 40. These limiting rings 40 are spaced apart along the extension direction of the bending groove 20a and are detachably connected to the bending die 20, with the arc-shaped opening of the limiting rings 40 facing the bending groove 20a. That is, after the underfloor heating pipe is bent to the required radius of curvature, the limiting rings 40 are installed on the bending die 20. At this time, the limiting rings 40 are located outside the bending groove 20a, thus restricting the underfloor heating pipe and fixing it within the arc-shaped groove, preventing the pipe from springing back after bending and thus ensuring an accurate bending angle is achieved. It should be noted that "multiple" refers to two or more, specifically selected based on the length of the bending groove 20a, and is not limited thereto. The detachable connection between the limiting rings 40 and the bending die 20 includes, but is not limited to, snap-fit ​​or plug-in connections.

[0029] In addition, the upper and lower surfaces of the outer contour of the bending mold 20 are provided with hollow openings 20b that connect to the bending groove 20a, so that after the underfloor heating pipe is bent into the bending groove 20a, the contact surface between the groove wall and the underfloor heating pipe can be prevented from being too tight, which would affect the location of the underfloor heating pipe breakage and cause inaccurate problems.

[0030] In one embodiment, the rotating wheel 30 includes an axle 31 and wheel bodies 32 located at both ends of the axle 31. The outer peripheral surfaces of the two wheel bodies 32 contact the outer contour of the bending mold 20. That is, the two wheel bodies 32 are fixed to both ends of the axle 31 to form a symmetrically distributed structure, which creates a recessed area between the two wheel bodies 32 and forms a passage space with the bending mold 20. After the underfloor heating pipe passes through the passage space, the axle 31 contacts the outer side of the underfloor heating pipe, and the two wheel bodies 32 can restrict the underfloor heating pipe, preventing the rotating wheel 30 from tilting or deviating due to unilateral force during the pressure application process. In addition, the contact between the outer peripheral surfaces of the two wheel bodies 32 and the outer contour of the bending mold 20 allows the two wheel bodies 32 to jointly and evenly transmit pressure to the outer wall of the underfloor heating pipe, avoiding local stress concentration caused by point contact that may occur when a single wheel body 32 applies pressure, and reducing excessive thinning or local flattening of the outer wall of the pipe. On the other hand, it ensures that the rotating wheel 30 can move along the bending path of the bending groove 20a, thus playing a guiding role.

[0031] In one embodiment, the pipe bender used for pressure testing of underfloor heating pipes further includes a handle 50 and a connector 60 connected to one end of the handle 50 near the base 10. The connector 60 includes two horizontal plates 61 and a vertical plate 62 located at one end of the two horizontal plates 61. The two ends of the vertical plate 62 are fixedly connected to one end of the two horizontal plates 61, respectively, to form a receiving groove 60 extending toward the bending mold 20 and having an opening. The vertical plate 62 is connected to the end of the handle 50 near the base 10, and one end of one of the horizontal plates 61 is rotatably connected to the second mounting surface 12 of the base 10. The axle 31 of the rotating wheel 30 passes through the receiving groove 60, and the two wheel bodies 32 of the rotating wheel 30 are rotatably connected to the upper inner wall and lower inner wall of the receiving groove 60 along the thickness direction of the base, respectively. Part of the wheel body 32 of the rotating wheel 30 extends out from the opening and contacts the outer contour of the bending mold 20, and the base 10 has a guide groove 10a extending along the bending groove 20a.

[0032] In practical applications, when it is necessary to bend the underfloor heating pipe, the operator only needs to hold the end of the handle 50 away from the base 10 and turn the handle 50. Since the end of the handle 50 near the base 10 is connected to the vertical plate 62, and one of the horizontal plates 61 is rotatably connected to the second mounting surface 12 of the base 10, the connector 60 is pushed to move along the extension direction of the bending groove, thereby driving the wheel 30 installed in the connector 60 to move, thus driving the wheel 30 to move. The structure is simple and the operation is convenient.

[0033] In addition, a curvature scale line 100 is drawn on the upper surface of the outer contour of the bending mold 20 along the extension direction of the bending groove 20a, and a scale pointer 200 is located on a horizontal plate 61 above the base. The pointer 200 is located at the end of the plate facing the bending mold so that when the operator turns the handle 50 to drive the rotating wheel 30 to rotate, the scale pointer 200 moves accordingly. After rotating to the desired position, the scale pointer 200 stops on the corresponding curvature scale line 100, so that the bending to the corresponding bending radius can be observed more intuitively.

[0034] In one embodiment, it also includes a locking pin 70 and a locking head. Both horizontal plates 61 are provided with adjustment holes extending along their length direction. The rotating wheel 30 is provided with a through hole 31a along the thickness direction of the base. The locking pin 70 passes through the adjustment hole and the through hole 31a from top to bottom. The locking head is threaded to the lower end of the locking pin 70 and is used to lock or release the rotating wheel 30. In other words, after the rotating wheel 30 is placed into the storage slot 60, the two wheel bodies 32 abut against the two horizontal plates 61 respectively. At this time, the through hole 31a of the rotating wheel 30 is aligned with the mounting hole of the horizontal plate 61. Then, the locking pin 70 passes through the mounting hole and the through hole 31a from top to bottom. Finally, the locking head is used to lock the lower end of the locking pin 70, thereby locking the rotating wheel 30 and detachably fixing the rotating wheel 30 to the connector 60. When it is necessary to disassemble the rotating wheel 30, simply loosen the locking head and pull the locking pin 70 upward to release the fixing of the rotating wheel 30, and disassembly can be achieved. The structure is simple and easy to disassemble and assemble.

[0035] In one embodiment, a grip head 80 is fitted onto the end of the handle 50 away from the base 10. This facilitates gripping by the operator and reduces the problem of poor bending performance due to hand slippage during operation.

[0036] In one embodiment, a snap-fit ​​post 90 is provided on the first mounting surface 11 along the thickness direction of the base, and a snap-fit ​​cavity adapted to the snap-fit ​​post 90 is provided in the middle of the bending mold 20.

[0037] Furthermore, the two opposite sides of the snap-fit ​​post 90 are provided with limiting protrusions 90a, and the snap-fit ​​cavity is recessed in the cavity wall corresponding to the limiting protrusions 90a to form a limiting groove; when the snap-fit ​​post 90 extends into the snap-fit ​​cavity, the limiting protrusions 90a are inserted into the limiting groove to restrict the rotation of the bending mold 20. That is to say, after aligning the snap-fit ​​cavity in the bending mold 20 with the snap-fit ​​post 90, and then placing the bending mold 20 on the first mounting surface 11, the snap-fit ​​post 90 will snap into the snap-fit ​​cavity, and the limiting protrusions 90a will be inserted into the limiting groove, thereby preventing the bending mold 20 from rotating during the movement of the rotating wheel 30, and preventing problems such as bending angle deviation and increased inner fitting gap.

[0038] In one embodiment, the base 10 has a fixing portion 10b extending along its thickness direction, which is used to fix it to an external fixing surface. The fixing portion 10b has multiple fixing holes. That is, after the fixing portion 10b contacts the external fixing surface, fasteners (such as bolts) can pass through the fixing holes and be inserted into the fixing surface to fix the base 10, preventing relative displacement of the base 10 during bending and thus affecting the bending accuracy.

[0039] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A pipe bender for pressure testing of underfloor heating pipes, characterized in that, include: The base has a first mounting surface and a second mounting surface that are opposite each other along its own thickness direction; A bending die is detachably mounted on a first mounting surface of the base. The outer contour of the bending die is provided with a bending groove along its circumference, the bending groove being used to accommodate the underfloor heating pipe to be bent. A rotating wheel is located on one side of the bending mold where the bending groove is provided, and defines a passage space with the outer contour of the bending mold. The rotating wheel can move relative to the base along the extension direction of the bending groove to press the underfloor heating pipe in the passage space into the bending groove to achieve bending.

2. The pipe bender for pressure testing of underfloor heating pipes according to claim 1, characterized in that, The pipe bender used for pressure testing of underfloor heating pipes also includes multiple limiting rings, which are spaced apart along the extension direction of the bending groove and are detachably connected to the bending mold, with the arc-shaped opening of the limiting ring facing the bending groove.

3. The pipe bender for pressure testing of underfloor heating pipes according to claim 1, characterized in that, The wheel includes an axle and wheel bodies located at both ends of the axle, with the outer peripheral surfaces of the two wheel bodies in contact with the outer contour of the bending mold.

4. The pipe bender for pressure testing of underfloor heating pipes according to claim 2, characterized in that, The pipe bender used for pressure testing of underfloor heating pipes also includes a handle and a connector connected to one end of the handle near the base. The connector includes two horizontal plates and a vertical plate located at one end of the two horizontal plates. The two ends of the vertical plate are respectively fixedly connected to one end of the two horizontal plates to form a storage groove that extends toward the bending mold and has an opening. The vertical plate is connected to the end of the handle near the base. One end of one of the horizontal plates is rotatably connected to the second mounting surface of the base. The axle of the rotating wheel passes through the storage groove, and the two wheel bodies of the rotating wheel are rotatably connected to the upper inner wall and lower inner wall of the storage groove along the thickness direction of the base, respectively; the wheel body part of the rotating wheel extends out from the opening and contacts the outer contour of the bending mold, and the base is provided with a guide groove extending along the bending groove direction.

5. The pipe bender for pressure testing of underfloor heating pipes according to claim 4, characterized in that, It also includes a locking pin and a locking head. Both of the horizontal plates are provided with mounting holes. The rotating wheel is provided with a through hole along the thickness direction of the base. The locking pin passes through the mounting hole and the through hole from top to bottom. The locking head is threaded to the lower end of the locking pin and is used to lock or release the rotating wheel.

6. The pipe bender for pressure testing of underfloor heating pipes according to claim 4, characterized in that, A grip head is fitted onto the end of the handle away from the base.

7. The pipe bender for pressure testing of underfloor heating pipes according to claim 1, characterized in that, A snap-fit ​​post is provided on the first mounting surface along the thickness direction of the base, and a snap-fit ​​cavity adapted to the snap-fit ​​post is provided in the middle of the bending mold.

8. The pipe bender for pressure testing of underfloor heating pipes according to claim 7, characterized in that, The two opposite sides of the snap-fit ​​post are provided with limiting protrusions, and the snap-fit ​​cavity is recessed in the cavity wall corresponding to the limiting protrusions to form a limiting groove; when the snap-fit ​​post extends into the snap-fit ​​cavity, the limiting protrusion is inserted into the limiting groove to restrict the rotation of the bending mold.

9. The pipe bender for pressure testing of underfloor heating pipes according to claim 1, characterized in that, The base has a fixing part extending along its thickness direction, and the fixing part has a plurality of fixing holes for fixing connection with an external fixing surface.

10. The pipe bender for pressure testing of underfloor heating pipes according to claim 1, characterized in that, The upper and lower surfaces of the outer contour of the bending mold are provided with hollow openings at intervals, and the hollow openings are connected to the bending groove.

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