Heavy thin-walled cold bending pipe sliding chute side pushing device

Abstract

The utility model discloses a be used for heavy thin -wall cold -bending pipe sliding slot side push device, including rotatable bending platform and the pipeline of waiting to bend, the part of pipeline located bending point both sides is front section pipeline and rear section pipeline respectively, be provided with the bending mechanism for clamping front section pipeline on the bending platform still, including side push mechanism and the core rod of supporting effect in rear section pipeline, the side push mechanism includes the sub -sliding slot of supporting rear section pipeline, the side push mechanism still includes the fixed clamping block of the movement of sub -sliding slot is oriented, the utility model has the beneficial effect for: through the setting of side push mechanism, makes in the bending pipe process, rear section pipeline can follow sub -sliding slot forward, and then makes front section pipeline and bending mechanism can form closed space between, has reduced the quality problem situation that bending pipe process possibly occurs flat, inner arc and so on, has improved heavy cold -bending product processing quality and operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pipe bending technology, and in particular to a side-pushing device for a sliding groove for heavy-duty thin-walled cold-bending pipes. Background Technology

[0002] Heavy-duty cold-bent pipes are an important component of boiler tubes in new types of power generation units such as gas and biomass boilers, serving as connectors and guides in boiler piping systems. According to the method of pipe bending, bending can be divided into push bending, roll bending, pressure bending, and wrap bending. Among these, wrap bending is relatively easy to automate, and currently, pipe bending machines mainly use the wrap bending method.

[0003] DL / T 515-2018 "Power Plant Pipe Bending" stipulates that the out-of-roundness of cold-bent pipes should not exceed 8%, and the waviness should not exceed 3%. Currently, the side-push blocks in the pressure dies of heavy-duty cold-bending machines are all roller-based. Based on existing production experience, the pipe cannot form a closed space with the bending die during roller-side-push bending. This results in roller-side-push being mainly used for thick-walled cold-bent pipes with a wall thickness greater than 12mm. Thin-walled cold-bent pipes are prone to quality problems such as flattening and inner arc bulging during bending, causing the out-of-roundness and waviness of heavy-duty thin-walled cold-bent pipes to exceed the standard technical requirements, severely reducing the quality of cold-bent pipe products and operational efficiency.

[0004] For example, the patent application number "CN 202322732764.7" discloses "a bending device for processing refrigeration pipe fittings". Although it achieves bending of the cold pipe, the corresponding cold pipe diameter is small and cannot be adapted to the heavy-duty cold pipe processed in this application. Summary of the Invention

[0005] The purpose of this invention is to provide a sliding side-push device for heavy-duty thin-walled cold-bending pipes, which reduces the possibility of quality problems such as flattening and inner arc bulging during the bending process, and improves the processing quality and work efficiency of heavy-duty cold-bending products.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A side-pushing device for a heavy-duty thin-walled cold-bending pipe chute includes a rotatable bending platform and a pipe to be bent. The pipe is divided into a front section and a rear section on either side of the bending point. The bending platform is equipped with a bending mechanism for clamping the front section of the pipe. It also includes a side-pushing mechanism and a mandrel located inside the rear section of the pipe for support. The side-pushing mechanism includes a sub-chute supporting the rear section of the pipe and a fixing block for guiding the movement of the sub-chute.

[0007] Preferably, the sub-groove has a semi-circular groove that matches the downstream pipe section.

[0008] Preferably, the side-pushing mechanism further includes a side-pushing platform, on which a driven wheel is provided, and the outer edge of the driven wheel abuts against the sub-slide groove.

[0009] Preferably, a female slide groove is provided between the driven wheel and the sub-slide groove, the driven wheel is an I-beam wheel, and the side wall of the female slide groove is provided with a protrusion that matches the recess of the driven wheel.

[0010] Preferably, a groove is provided on the opposite side of the female slide groove to the protrusion, and a protrusion that mates with the groove is provided on the side wall of the female slide groove.

[0011] Preferably, the side-pushing platform is provided with a cover plate, and the fixing block is installed on the cover plate.

[0012] Preferably, the bending mechanism includes a bending die and a clamping die, both of which have a semi-circular groove that matches the upstream pipe.

[0013] Preferably, the bending platform is further provided with a slide rail for the clamping mold to move back and forth.

[0014] Preferably, the device further includes a motor for driving the bending platform to rotate.

[0015] Preferably, the cross-section of the bending die is not a full circle, and its central angle is not less than 180°.

[0016] The beneficial effects of this utility model are as follows: 1. By setting up the side-pushing mechanism, the rear section of the pipe can move forward with the sub-slide during the bending process, thereby forming a closed space between the front section of the pipe and the bending mechanism. This reduces the possibility of quality problems such as flattening and inner arc bulging during the bending process, and improves the processing quality and operation efficiency of heavy cold-bent products.

[0017] 2. As the downstream pipe moves with the sub-slide, it drives the driven wheel to rotate through the mother slide, thus changing the moving friction into rolling friction, which improves the stability and reliability of the bending process.

[0018] 3. This device can adjust the specifications of the sub-groove, bending die, clamping die and mandrel according to different pipe specifications, so that the overall adaptability of the device is wide and can match different pipe specifications.

[0019] 4. During the bending process, the mandrel is placed on the inner wall of the pipe to provide support, while the semi-circular groove of the sub-slide fits tightly against the outer wall of the pipe, which can effectively reduce the amount of deformation during the cold bending process and reduce the roundness of the cold-bent pipe. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the device; Figure 2This is a cross-sectional view of the side thrust mechanism; Figure 3 This is a schematic diagram of the pipe structure after bending.

[0021] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings. Example

[0023] like Figure 1 and Figure 3 As shown, the side-pushing device for heavy-duty thin-walled cold-bending pipes in this embodiment includes a rotatable bending platform 12 and a pipe 3 to be bent. The pipe 3 has a front section pipe 31 and a rear section pipe 32 on both sides of the bending point. The bending platform 12 is provided with a bending mechanism for clamping the front section pipe 31. The device also includes a side-pushing mechanism and a mandrel 9 located in the rear section pipe for support. The side-pushing mechanism includes a sub-slide 1 that supports the rear section pipe 32. The side-pushing mechanism also includes a fixing block 4 that guides the movement of the sub-slide 1. There are two fixing blocks 4. Figure 3 The middle arrow indicates the conveying direction of pipe 3. During the bending process, pipe 3 is first fixed by a sling, and then a crane is used to convey the sling and pipe 3 to the pipe bending machine. When pipe 3 is in position (i.e., when the bending point contacts the bending mechanism), the conveying of pipe 3 is stopped (first, the sling is released from fixing pipe 3, and then the lifting component supports the rear pipe 32). The aforementioned sling, crane, and lifting component are all conventional equipment in the current workshop, and will not be described in detail in this embodiment. At this time, the bending mechanism clamps the front pipe 31, and the sub-slide 1 is pressed against the rear pipe 32. As the bending mechanism rotates, pipe 3 is bent at the bending point. At this time, the rear pipe 32 will drive the sub-slide 1, and the two move forward a certain distance synchronously with the bending process. The fixing block 4 can guide the movement of the sub-slide 1 (and the rear pipe 32).

[0024] To facilitate the fixing of the downstream pipe 32, the sub-slide 1 has a semi-circular groove that matches the downstream pipe 32.

[0025] like Figure 1 and Figure 2 As shown, the side-pushing mechanism also includes a side-pushing platform 13, on which a driven wheel 5 is provided. The outer edge of the driven wheel 5 abuts against the sub-slide 1. When the downstream pipe 32 drives the sub-slide 1 to move, the driven wheel 5 rotates, reducing the friction of the sub-slide 1.

[0026] A female slide 2 is provided between the driven wheel 5 and the sub-slide 1. The bottom of the sub-slide 1 is provided with a protrusion 16, and the side wall of the female slide 2 is provided with a groove that matches the protrusion 16. The protrusion 16 can be fixed in the groove, and the sub-slide 1 and the female slide 2 can be fixedly connected by bolts.

[0027] The driven wheel 5 is an I-beam wheel with a recess in its middle. The female slide groove 2 has a protrusion 15 on the other side of the recess. The protrusion 15 is located in the recess of the driven wheel 5. When the female slide groove 1 and the female slide groove 2 move, the friction can be reduced by the rotation of the driven wheel 5.

[0028] A cover plate 6 is provided on the side push platform 13, and the two ends of the driven wheel 5 central shaft are respectively installed on the side push platform 13 and the cover plate 6. The fixing block 4 is L-shaped, with one end installed on the cover plate 6 and the other end locked to the outside of the mother slide 2, which guides the movement of the mother slide 2 (as well as the sub slide 1 and the rear section pipe 32 in the sub slide 1).

[0029] The bending mechanism includes a bending die 7 and a clamping die 8, both of which have semi-circular grooves that match the front pipe 31. When the two are connected, they can completely clamp the front pipe 31 located inside them. At this time, the bending platform 12 rotates, driving the bending die 7 and the clamping die 8 to rotate synchronously, thereby achieving the bending of the pipe.

[0030] The bending platform 12 is also equipped with a slide rail 14. The clamping mold 8 can move back and forth along the slide rail 14. When the sling and overhead crane transport the pipeline, the clamping mold 8 moves backward. After the pipeline is transported to the correct position, the clamping mold 8 moves forward to cooperate with the bending mold 7 to clamp the pipeline.

[0031] A motor 10 is installed at the bottom of the bending platform 12. The motor 10 transmits power to the bending platform 12 through a transmission device 11 to drive the bending platform 12 to rotate. The transmission device 11 can be a belt or a chain.

[0032] To facilitate the rotation of the bending platform 12, the weight of the bending mechanism it bears needs to be minimized. Therefore, in this embodiment, the cross-section of the bending die 7 is set to a non-circular shape. To meet the bending requirements while minimizing the weight of the bending die 7, the central angle is set to 270° in this embodiment. Since the pipe is a straight line before bending, the maximum bending angle of the pipe after bending is 180° relative to its extension direction. Therefore, theoretically, a central angle of 180° can meet all bending requirements. However, in actual processing, to avoid accidental rotation of the bending die 7, ensure the bending effect, and reduce its weight, the central angle is set to 270°.

[0033] When performing heavy-duty thin-walled pipe bending operations, this device first places the bending portion of the pipe to be bent between the bending die 7 and the clamping die 8. Then, the clamping die 8 moves to the left to clamp the pipe and prevent axial movement. Next, the mandrel 9 is inserted into the appropriate position in the rear section of the pipe 32 (i.e., the bending portion of the pipe to be bent). The position can be determined by a mandrel machine (not shown in the figure). Then, the side-pushing platform 13 moves to the left, so that the sub-slide 1 is close to the rear section of the pipe 32. During pipe bending, the motor 10 drives the bending mechanism through the transmission device 11 to bend the portion to be bent. During this process, the rear section of the pipe 32 moves accordingly, driving the sub-slide 1 and the mother slide 2 to move, and the driven wheel 5 rotates driven by the movement. During the bending process, the mandrel 9 is placed on the inner wall of the pipe to provide support, while the sub-slide 1 fits tightly against the outer wall of the pipe. The sub-slide 1, the fixing block 4, the driven wheel 5, the cover plate 6, the bending die 7, the clamping die 8, and the mandrel 9 are all made of die steel. This device can perform cold bending on heavy thin-walled pipes, increasing the fit between the pipe and the device during bending, effectively reducing the amount of deformation during cold bending, reducing the out-of-roundness of the cold-bent pipe, meeting standard technical requirements, and improving the quality of cold-bent pipe products and work efficiency.

[0034] The sub-groove 1, bending die 7, clamping die 8, and mandrel 9 can be adjusted according to the specifications of the pipe, making the overall adaptability of this device wide. After the clamping die 8 is adjusted to the correct position (on the slide rail 14), it can be fixed by bolts (not shown). During the bending process, the semi-circular groove of the sub-groove 1 fits tightly against the outer wall of the pipe, effectively reducing the amount of deformation during the cold bending process.

[0035] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify 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 limiting the scope of protection of this utility model.

[0037] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A side-pushing device for a heavy-duty thin-walled cold-bending pipe slideway, comprising a rotatable bending platform and a pipe to be bent, wherein the portions of the pipe located on either side of the bending point are a front section and a rear section, respectively, and the bending platform is provided with a bending mechanism for clamping the front section of the pipe, characterized in that, It also includes a side-pushing mechanism and a mandrel located in the rear section of the pipe that provides support. The side-pushing mechanism includes a sub-slide groove that supports the rear section of the pipe, and the side-pushing mechanism also includes a fixing block that guides the movement of the sub-slide groove.

2. The skid side pusher device for heavy thin-walled cold-bending pipe according to claim 1, characterized in that, The sub-slide has a semi-circular groove that matches the downstream pipe section.

3. The skid side pusher device for heavy thin-walled cold-bending pipe according to claim 1, characterized in that, The side-pushing mechanism also includes a side-pushing platform, on which a driven wheel is provided, and the outer edge of the driven wheel abuts against the sub-slide groove.

4. The side-pushing device for heavy-duty thin-walled cold-bending pipes according to claim 3, characterized in that, A female slide groove is also provided between the driven wheel and the sub-slide groove. The driven wheel is an I-beam wheel, and the side wall of the female slide groove is provided with a protrusion that matches the recess of the driven wheel.

5. The side-pushing device for heavy-duty thin-walled cold-bent pipes according to claim 4, characterized in that, The mother slide groove has a groove on the opposite side of the protrusion, and the side wall of the child slide groove has a protrusion that mates with the groove.

6. The skid side pusher device for heavy thin-walled cold-bending pipe according to claim 3, characterized in that, The side-push platform is provided with a cover plate, and the fixing block is installed on the cover plate.

7. The side-pushing device for heavy-duty thin-walled cold-bent pipes according to claim 1, characterized in that, The bending mechanism includes a bending die and a clamping die, both of which have a semi-circular groove that matches the upstream pipe.

8. The side-pushing device for heavy-duty thin-walled cold-bent pipes according to claim 7, characterized in that, The bending platform is also equipped with a slide rail for the clamping mold to move back and forth.

9. The side-pushing device for heavy-duty thin-walled cold-bent pipes according to claim 7, characterized in that, It also includes the motor that drives the bending platform to rotate.

10. The skid side pusher device for heavy thin-walled cold-bending pipe according to claim 7, characterized in that, The cross-section of the bending die is not a complete circle, and its central angle is not less than 180°.

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