auxiliary device

Abstract

This utility model discloses an auxiliary device, including a transition tube, a first conical sleeve, a pull rod, a second conical sleeve, and an expansion block. The transition tube is used to splice with the end of a pipe fitting. The first conical sleeve is fixed at one end of the transition tube, and the end of the first conical sleeve away from the transition tube is conical. The pull rod is slidably built into the transition tube, passes through the first conical sleeve, and is slidably connected to the first conical sleeve. The second conical sleeve is fixed at the end of the pull rod that protrudes from the first conical sleeve, and the end of the second conical sleeve near the first conical sleeve is conical. The expansion block has insertion holes at both ends, and the pull rod passes through the expansion block. The two insertion holes are respectively set with the first conical sleeve and the second conical sleeve. When the expansion block is inserted into the end of the pipe fitting, the two ends of the expansion block are expanded by the cooperation of the first conical sleeve and the second conical sleeve, so that the expansion block is fixed at the end of the pipe fitting. At this time, the length of the pipe fitting is extended by the transition tube, which facilitates the bending mechanism to bend the pipe fitting.

Description

Technical Field

[0001] This utility model relates to the field of pipe bending equipment, and in particular to an auxiliary device. Background Technology

[0002] Currently, when bending serpentine pipe banks, bending equipment with CNC systems is generally used. The equipment also has an auxiliary trolley at the end for assisting and monitoring the feeding during bending. However, due to the limited stroke of this feeding trolley, when the straight section at the end of the pipe bank is short, the feeding trolley cannot feed properly due to hardware interference. Therefore, the operator needs to mark the lines and then manually bend the pipe. This is inefficient and involves a second alignment, which can easily lead to dimensional problems and affect the bending dimensions. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an auxiliary device that can extend the length of the pipe fitting using a transition tube, facilitating the bending mechanism to bend the pipe fitting.

[0004] An auxiliary device according to a first aspect of the present invention includes a transition tube, a first conical sleeve, a pull rod, a second conical sleeve, and an expansion block. The transition tube is used to splice with the end of a pipe fitting. The first conical sleeve is fixed to one end of the transition tube, and the end of the first conical sleeve away from the transition tube is conical. The pull rod is slidably built into the transition tube, passes through the first conical sleeve, and is slidably connected to the first conical sleeve. The second conical sleeve is fixed to the end of the pull rod that protrudes from the first conical sleeve, and the end of the second conical sleeve near the first conical sleeve is conical. The expansion block has insertion holes at both ends, and the pull rod passes through the expansion block. The two insertion holes are respectively provided with the first conical sleeve and the second conical sleeve. The pull rod can slide in the transition tube so that the first conical sleeve and the second conical sleeve face or move away from the insertion holes. The ends of the first conical sleeve and the second conical sleeve can be inserted into the insertion holes at both ends to expand the expansion block.

[0005] The auxiliary device according to the embodiment of the present utility model has at least the following beneficial effects: the expansion block is inserted into the end of the pipe fitting, and the two ends of the expansion block are expanded by the cooperation of the first conical sleeve and the second conical sleeve, so that the expansion block is fixed at the end of the pipe fitting. At this time, the length of the pipe fitting is extended by the transition tube, which makes it convenient for the pipe bending mechanism to bend the pipe fitting.

[0006] According to some embodiments of the present invention, the expansion block is provided with multiple positioning grooves at one end facing the first conical sleeve, and a positioning plate is provided on the side wall of the end of the first conical sleeve. The positioning plate and the positioning groove correspond one-to-one and are embedded in the positioning groove. The positioning plate can slide in the positioning groove.

[0007] According to some embodiments of the present invention, a sealing plate is fixedly connected to the front end of the transition tube, a through hole is provided through the middle of the sealing plate, the pull rod passes through the through hole and is slidably connected to the through hole, a connecting ring is provided at one end of the first conical sleeve near the transition tube, and the connecting ring and the sealing plate are fixedly connected by screws.

[0008] According to some embodiments of the present invention, the sealing plate is provided with a positioning protrusion, the connecting ring is provided with a groove, and the positioning protrusion is embedded in the groove.

[0009] According to some embodiments of the present invention, the transition tube is provided with a sliding channel along the axial direction of the transition tube, the pull rod is built into the sliding channel, the inner diameter of the sliding channel is larger than the diameter of the pull rod, the body of the pull rod is fixedly connected to a sleeve, the sleeve is embedded in the sliding channel, and the sleeve can slide along the extension direction of the sliding channel.

[0010] According to some embodiments of this utility model, two rod sleeves are provided, which are respectively disposed at both ends of the pull rod. Both ends of the transition tube are provided with sealing plates, and the rod sleeves can abut against the sealing plates to constrain the position of the pull rod.

[0011] According to some embodiments of the present invention, a driving cylinder is also included. The driving cylinder is fixedly connected to the end of the transition tube away from the first tapered sleeve. The driving cylinder is fixedly connected to the end of the pull rod to drive the pull rod to slide back and forth.

[0012] According to some embodiments of this utility model, a connecting flange is fixedly connected to the end of the transition pipe, the driving cylinder is fixedly connected to the connecting flange, the connecting flange is provided with a through hole, the inner wall of the through hole is provided with a guide groove, the driving cylinder is provided with a piston rod, a connecting sleeve is fixedly connected between the piston rod and the pull rod, a guide protrusion is provided on the outer side of the connecting sleeve, the guide protrusion is embedded in the guide groove and is slidably connected with the guide groove.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0015] Figure 1 This is a schematic diagram of the auxiliary device according to an embodiment of the present utility model;

[0016] Figure 2This is a partial schematic diagram of the auxiliary device according to an embodiment of the present utility model;

[0017] Figure 3 This is a three-dimensional assembly diagram of the first cone sleeve, pull rod, second cone sleeve, and expansion block of the auxiliary device according to an embodiment of the present utility model;

[0018] Figure 4 This is a cross-sectional schematic diagram of the connecting sleeve and connecting flange of the auxiliary device according to an embodiment of the present utility model;

[0019] Figure 5 This is a three-dimensional schematic diagram of the connecting sleeve of the auxiliary device according to an embodiment of the present utility model;

[0020] Figure 6 This is a perspective view of the connecting flange of the auxiliary device in an embodiment of this utility model.

[0021] 100. Transition pipe; 110. Sealing plate; 111. Through hole; 112. Positioning protrusion; 120. Sliding channel; 130. Connecting flange; 131. Perforation; 132. Guide groove;

[0022] 200, First conical sleeve; 210, Connecting ring; 211, Groove; 220, Positioning plate;

[0023] 300. Pull rod; 310. Rod sleeve;

[0024] 400. Second cone sleeve;

[0025] 500, Expansion block; 510, Insertion hole; 520, Positioning groove;

[0026] 600. Drive cylinder; 610. Piston rod; 620. Connecting sleeve; 630. Guide protrusion; Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Reference Figures 1 to 6 The auxiliary device of this utility model embodiment includes a transition tube 100, a first conical sleeve 200, a pull rod 300, a second conical sleeve 400, and an expansion block 500. The transition tube 100 is used to splice with the end of a pipe fitting. The first conical sleeve 200 is fixed to one end of the transition tube 100, and the end of the first conical sleeve 200 away from the transition tube 100 is conical. The pull rod 300 is slidably built into the transition tube 100, passes through the first conical sleeve 200, and is slidably connected with the first conical sleeve 200. The second conical sleeve 400 is fixed to the pull rod 300 and protrudes from the first conical sleeve. At one end of the first cone sleeve 200, the second cone sleeve 400 is cone-shaped near the end of the first cone sleeve 200; the expansion block 500 is provided with insertion holes 510 at both ends, and the pull rod 300 passes through the expansion block 500. The two insertion holes 510 are respectively provided with the first cone sleeve 200 and the second cone sleeve 400; wherein, the pull rod 300 can slide in the transition tube 100 so that the first cone sleeve 200 and the second cone sleeve 400 are facing or away from the insertion holes 510; the ends of the first cone sleeve 200 and the second cone sleeve 400 can be inserted into the insertion holes 510 at both ends so that the expansion block 500 expands.

[0032] In practical use, the pull rod 300 slides axially within the transition tube 100, causing the second cone sleeve 400 to move closer to or further away from the first cone sleeve 200. When the pull rod 300 slides towards the first cone sleeve 200, the second cone sleeve 400 moves towards the first cone sleeve 200, and the conical ends of the first cone sleeve 200 and the second cone sleeve 400 gradually insert into the insertion holes 510 at both ends of the expansion block 500. As the pull rod 300 continues to slide, the conical surfaces of the first cone sleeve 200 and the second cone sleeve 400 gradually penetrate deeper into the insertion holes 510, forcing the expansion block 500 to expand radially, thereby achieving a tight fixation between the expansion block 500 and the end of the pipe fitting. The transition tube 100 effectively extends the length of the pipe fitting, solving the problem that the pipe fitting end is difficult to be clamped and bent by the bending mechanism when it is short, and improving the convenience of the bending operation.

[0033] In summary, by utilizing the conical structure of the first conical sleeve 200 and the second conical sleeve 400 and the engagement of the expansion block 500 with the insertion hole 510, the axial movement of the pull rod 300 is converted into the radial expansion force of the expansion block 500. Fixing is achieved through the friction between the expansion block 500 and the inner wall of the pipe. The transition pipe 100 extends the effective working length of the pipe by splicing, providing sufficient clamping and operating margin for the pipe bending mechanism.

[0034] In some embodiments, refer to Figure 3 The expansion block 500 has multiple positioning grooves 520 at one end facing the first conical sleeve 200. A positioning plate 220 is provided on the side wall of the end of the first conical sleeve 200. The positioning plate 220 corresponds one-to-one with the positioning grooves 520 and is embedded in the positioning grooves 520. The positioning plate 220 can slide within the positioning grooves 520. When the first conical sleeve 200 moves towards the expansion block 500, the positioning plate 220 slides synchronously along the positioning grooves 520. When the first conical sleeve 200 is inserted into the insertion hole 510, the positioning plate 220 remains embedded in the positioning grooves 520 and adjusts its position as the conical sleeve moves, restricting the circumferential relative rotation between the expansion block 500 and the first conical sleeve 200. This ensures accurate positional correspondence between the two during expansion, improving structural stability and operational reliability.

[0035] In some embodiments, refer to Figure 1 and Figure 2 A sealing plate 110 is fixedly connected to the front end of the transition tube 100. A through hole 111 is provided through the middle of the sealing plate 110. The pull rod 300 passes through the through hole 111 and is slidably connected to the through hole 111. A connecting ring 210 is provided at the end of the first tapered sleeve 200 near the transition tube 100. The connecting ring 210 and the sealing plate 110 are fixedly connected by screws. The pull rod 300 slides axially along the through hole 111 of the sealing plate 110. The first tapered sleeve 200 is rigidly connected to the sealing plate 110 through the connecting ring 210. The screws fasten the connecting ring 210 and the sealing plate 110 into one piece, realizing a stable connection between the first tapered sleeve 200 and the transition tube 100. The through hole 111 on the sealing plate 110 provides stable sliding support for the pull rod 300, reduces radial sway when the pull rod 300 slides, and improves the rigidity of the overall structure.

[0036] Preferably, refer to Figure 1Along the axial direction of the transition tube 100, the transition tube 100 is provided with a sliding channel 120. The pull rod 300 is built into the sliding channel 120. The inner diameter of the sliding channel 120 is larger than the diameter of the pull rod 300. The rod body of the pull rod 300 is fixedly connected to a rod sleeve 310. The rod sleeve 310 is embedded in the sliding channel 120 and can slide along the extension direction of the sliding channel 120. When the pull rod 300 slides within the sliding channel 120, it drives the sleeve 310 to move axially synchronously along the inner wall of the channel. The sleeve 310 forms a sliding fit with the inner wall of the sliding channel 120, reducing the radial sway of the pull rod 300 during sliding, reducing direct wear between the pull rod 300 and the inner wall of the channel, and extending the service life of the components. To further optimize the embodiment, two sleeves 310 are provided, one at each end of the pull rod 300. Both ends of the transition tube 100 are provided with sealing plates 110, and the sleeves 310 can abut against the sealing plates 110 to constrain the position of the pull rod 300. When the pull rod 300 slides to its limit position, the sleeves 310 at both ends abut against the sealing plates 110 at both ends of the transition tube 100, preventing the pull rod 300 from continuing to move in that direction. This mechanically limits the sliding stroke of the pull rod 300, preventing collisions or detachment between components due to excessive sliding, protecting the safety of the overall structure, and achieving precise control of the stroke endpoint.

[0037] In some embodiments, refer to Figure 2 The sealing plate 110 is provided with a positioning protrusion 112, and the connecting ring 210 is provided with a groove 211, with the positioning protrusion 112 embedded in the groove 211. When installing the first tapered sleeve 200, the groove 211 of the connecting ring 210 is aligned with the positioning protrusion 112 of the sealing plate 110 and embedded, and then the connecting ring 210 and the sealing plate 110 are fixed with screws, so as to achieve quick positioning and installation of the connecting ring 210 and the sealing plate 110, ensure the accurate relative position of the two, prevent circumferential misalignment during installation, and improve assembly efficiency.

[0038] In some embodiments, refer to Figure 1 and Figure 4 The auxiliary device also includes a drive cylinder 600, which is fixedly connected to the end of the transition tube 100 away from the first tapered sleeve 200. The drive cylinder 600 and the end of the pull rod 300 are fixedly connected to drive the pull rod 300 to slide back and forth. When the piston rod 610 of the drive cylinder 600 extends or retracts, it drives the pull rod 300 connected to the piston rod 610 to slide back and forth along the axial direction of the transition tube 100, thereby controlling the relative position of the first tapered sleeve 200 and the second tapered sleeve 400.

[0039] Preferably, refer to Figure 1 , Figure 4 , Figure 5 and Figure 6The end of the transition pipe 100 is fixedly connected to a connecting flange 130. The drive cylinder 600 is fixedly connected to the connecting flange 130. The connecting flange 130 is provided with a through hole 131. The inner wall of the through hole 131 is provided with a guide groove 132. The drive cylinder 600 is provided with a piston rod 610. A connecting sleeve 620 is fixedly connected between the piston rod 610 and the pull rod 300. A guide protrusion 630 is provided on the outer side of the connecting sleeve 620. The guide protrusion 630 is embedded in the guide groove 132 and is slidably connected with the guide groove 132. When the hydraulic cylinder 600 is working, the piston rod 610 drives the pull rod 300 to slide through the connecting sleeve 620. At the same time, the guide protrusion 630 of the connecting sleeve 620 slides synchronously along the guide groove 132 of the through hole 131 of the connecting flange 130, ensuring the coaxiality of the piston rod 610 and the pull rod 300, preventing radial offset or circumferential rotation during the movement, and improving the stability and accuracy of the driving process. In addition, the sliding cooperation between the guide protrusion 630 and the guide groove 132 forms an axial guiding constraint, limiting the radial displacement and circumferential rotation of the connecting sleeve 620, and ensuring the stability of the power transmission path.

[0040] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An auxiliary device, characterized in that, include: Transition pipe (100) is used for splicing with the end of pipe fittings; The first conical sleeve (200) is fixed at one end of the transition tube (100), and the end of the first conical sleeve (200) away from the transition tube (100) is conical; A pull rod (300) is slidably built into the transition tube (100), the pull rod (300) passes through the first tapered sleeve (200) and is slidably connected to the first tapered sleeve (200); The second cone sleeve (400) is fixed to one end of the pull rod (300) that protrudes from the first cone sleeve (200), and the end of the second cone sleeve (400) near the first cone sleeve (200) is cone-shaped; An expansion block (500) is provided with insertion holes (510) at both ends. The pull rod (300) passes through the expansion block (500). The two insertion holes (510) are respectively provided with the first conical sleeve (200) and the second conical sleeve (400). The pull rod (300) can slide in the transition tube (100) so that the first conical sleeve (200) and the second conical sleeve (400) are facing or away from the insertion hole (510); the ends of the first conical sleeve (200) and the second conical sleeve (400) can be inserted into the insertion holes (510) at both ends respectively so that the expansion block (500) expands.

2. The auxiliary device according to claim 1, characterized in that, The expansion block (500) has multiple positioning grooves (520) at one end facing the first conical sleeve (200). The side wall of the end of the first conical sleeve (200) is provided with a positioning plate (220). The positioning plate (220) corresponds one-to-one with the positioning groove (520) and is embedded in the positioning groove (520). The positioning plate (220) can slide in the positioning groove (520).

3. The auxiliary device according to claim 1, characterized in that, A sealing plate (110) is fixedly connected to the front end of the transition tube (100). A through hole (111) is provided through the middle of the sealing plate (110). The pull rod (300) passes through the through hole (111) and is slidably connected to the through hole (111). A connecting ring (210) is provided at one end of the first tapered sleeve (200) near the transition tube (100). The connecting ring (210) and the sealing plate (110) are fixedly connected by screws.

4. The auxiliary device according to claim 3, characterized in that, The sealing plate (110) is provided with a positioning protrusion (112), and the connecting ring (210) is provided with a groove (211), and the positioning protrusion (112) is embedded in the groove (211).

5. The auxiliary device according to claim 3, characterized in that, Along the axial direction of the transition tube (100), the transition tube (100) is provided with a sliding channel (120), the pull rod (300) is built into the sliding channel (120), the inner diameter of the sliding channel (120) is larger than the diameter of the pull rod (300), the rod body of the pull rod (300) is fixedly connected to a rod sleeve (310), the rod sleeve (310) is embedded in the sliding channel (120), and the rod sleeve (310) can slide along the extension direction of the sliding channel (120).

6. The auxiliary device according to claim 5, characterized in that, Two rod sleeves (310) are provided, and the two rod sleeves (310) are respectively located at both ends of the pull rod (300). Both ends of the transition tube (100) are provided with sealing plates (110). The rod sleeves (310) can abut against the sealing plates (110) to constrain the position of the pull rod (300).

7. The auxiliary device according to claim 1, characterized in that, It also includes a drive cylinder (600), which is fixedly connected to the end of the transition tube (100) away from the first tapered sleeve (200). The drive cylinder (600) and the end of the pull rod (300) are fixedly connected to drive the pull rod (300) to slide back and forth.

8. The auxiliary device according to claim 7, characterized in that, The end of the transition pipe (100) is fixedly connected to a connecting flange (130). The driving cylinder (600) is fixedly connected to the connecting flange (130). The connecting flange (130) is provided with a through hole (131). The inner wall of the through hole (131) is provided with a guide groove (132). The driving cylinder (600) is provided with a piston rod (610). A connecting sleeve (620) is fixedly connected between the piston rod (610) and the pull rod (300). A guide protrusion (630) is provided on the outer side of the connecting sleeve (620). The guide protrusion (630) is embedded in the guide groove (132) and is slidably connected with the guide groove (132).

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