Hole drawing device for slender thin-wall refrigerating system pipe fitting

Abstract

The utility model discloses a slender thin-wall refrigerating system pipe fitting hole drawing device, which belongs to the manufacturing technology of refrigerating system pipe fittings, and comprises an inner socket pipe and a hole correcting piece, a driving wedge head rod is in sliding fit in the inner socket pipe, a radial through hole is arranged on the side wall of the inner socket pipe, a drawing head is in sliding fit in the radial through hole, and the hole correcting piece is arranged in the drawing head. The pulling head is in sliding fit with the end part of the driving wedge head rod; the driving wedge head rod moves in the inner socket pipe to drive the pulling head to extend inwards and outwards or retract inwards in the radial through hole; the hole correcting piece is located over the radial through hole, moves up and down relative to the vertical radial through hole and is used for rounding the inner wall of the hole flanged by the pulling head. Through one-time pipe fitting installation, hole drawing and hole correction are completed, the outwards-drawn turned edge can be shaped through the hole correction, the axial size of the turned edge can be corrected to be consistent, the quality and precision of the turned edge structure are both kept at the high level, and then assembling and welding of the copper branch pipe are ensured.

Description

Technical Field

[0001] The utility model relates to a refrigeration system pipeline manufacturing technology, in particular to a slender thin-wall refrigeration system pipe pulling device. Background Art

[0002] In the prior art, the refrigeration pipeline is a combination of a stainless steel main pipe and a copper branch pipe, and the copper branch pipe is fixed to the stainless steel main pipe by socket welding, for example Figure 1 、 2 As shown, an external flange structure is provided on the stainless steel main pipe, and the copper branch pipe end is assembled internally by socket-fitting. Finally, the welding is completed in a tunnel furnace using solder. However, in the past, the external flange of stainless steel main pipes was mostly performed by external drawing. Due to drafting defects, the flange size varies along the axis. The drafting resistance of the pipe wall also causes the inner circle of the flange to be out of roundness and substandard. This is not conducive to the socket-fitting of the copper branch pipe (copper is softer than stainless steel, which can easily cause surface damage during socket-fitting) and subsequent welding, and is prone to weld defects. Utility Model Content

[0003] In order to solve the above technical problems, the inventors have come up with the technical solution of the present invention through practice and summary. The present invention adopts the following technical solution:

[0004] A device for extracting holes from slender, thin-walled refrigeration system pipe fittings, comprising:

[0005] An inner bell-and-spigot pipe, wherein a driving wedge rod is slidably fitted inside the inner bell-and-spigot pipe, a radial through hole is provided on the side wall of the inner bell-and-spigot pipe, a pulling head is slidably fitted in the radial through hole, and the pulling head is slidably fitted on the end of the driving wedge rod, and the movement of the driving wedge rod in the inner bell-and-spigot pipe drives the pulling head to extend or retract inward or outward of the radial through hole;

[0006] The hole-calibrating piece is located directly above the radial through hole and moves up and down relative to the vertical radial through hole. The hole-calibrating piece is used to make the inner wall of the hole of the flanging of the pulling head round.

[0007] Preferably, the side wall of the end of the driving wedge rod is provided with an oblique guide groove, and the bottom of the pulling head is provided with a guide block, and the guide block and the oblique guide groove are in sliding fit.

[0008] Preferably, it further comprises a positioning block, the positioning block is provided with a notch groove, and the positioning block is provided with a concave positioning structure;

[0009] The positioning block is slidably matched with a moving block which moves away from or close to the positioning block. A limiting structure is provided on the moving block. The positioning structure and the limiting structure are used for radial positioning of the pipe fitting.

[0010] Preferably, the hole calibration member is located at the top of the notch groove, the vertical position of the hole calibration member relative to the notch groove is adjustable, and the hole calibration member is equipped with a forming portion, a socket portion, and a gradient portion arranged between the forming portion and the socket portion.

[0011] Preferably, the end of the pull head is provided with a matching blind hole, and the matching blind hole and the socket portion are adapted;

[0012] The root of the matching blind hole is provided with a hooking groove and a magnetic block is provided in the groove, and an eccentric block is provided on the outside of the socket part. The magnetic block is used to absorb the eccentric block so that the eccentric block is offset in the matching blind hole to form a hooking structure.

[0013] Preferably, a sleeve is installed on the outside of the hole calibration member, an ear plate is installed on the outside of the sleeve, a guide rod is inserted on the ear plate, the guide rod is installed on the positioning block, a spring is installed between the ear plate and the positioning block, and the spring is sleeved on the outside of the guide rod.

[0014] Preferably, a rotating crown is provided on the top of the hole adjustment member, and the magnetic block and the eccentric block are separated by operating the rotating crown.

[0015] Preferably, the moving block is provided with an arc-shaped groove, a rotating plate is slidably fitted in the arc-shaped groove, an avoidance groove is provided on the top of the rotating plate, the avoidance groove and the notch groove are surrounded by a flange outer molding area, and a horizontal rod is installed on the top side of the rotating plate;

[0016] A horizontal groove for positioning the horizontal rod is provided on one side of the top of the positioning block, and a hook plate is rotatably installed on the side of the positioning block. The hook plate is used to hook the horizontal rod and be confined in the horizontal groove. An arc guide groove is provided on the rear side of the hook plate, and a pin shaft is installed in the arc guide groove. The pin shaft is installed on the side of the positioning block.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention completes the hole extraction and hole calibration by installing the pipe fittings at one time. The calibration hole can be used to shape the flange pulled out and calibrate its axial size to be consistent, so that the quality and precision of the flange structure are maintained at a high level, thereby ensuring the assembly and welding of the copper branch pipe. Secondly, the hole calibration piece and the pulling head are improved at the same time. By matching the blind hole and the socket part, the eccentric block at the end is rotated to a certain angle under the adsorption action of the magnetic block to form a hook structure, and then when the pulling head is retracted, the hole calibration piece can be driven downward to calibrate the flange. Thirdly, the problem of uneven flange end face is easy to occur when pulling the hole. By using a rotating plate to cooperate with the positioning block to realize the flange outer forming area, the avoidance groove and the notch groove are used to enclose the flange outer forming area to pull the pipe wall of the flange part to ensure that the pipe wall will not be greatly deformed, thereby accurately controlling the end face height and the flange structure thickness to be relatively uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the refrigeration pipeline in the prior art.

[0020] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0021] Figure 3 This is a structural diagram of an implementation method of the utility model.

[0022] Figure 4 It is a structural schematic diagram of another embodiment of the present invention.

[0023] Figure 5 This is a positional relationship diagram of the pull head, inner socket pipe, and driving wedge rod of the utility model.

[0024] Figure 6 for Figure 5 A partial enlarged view of point E in the middle.

[0025] Figure 7 for Figure 6 Side view of the moving block and positioning block.

[0026] Figure 8 for Figure 5 Structural diagram of the hooking form at the bottom end of the center hole piece and the top end of the pull head.

[0027] Figure 9 for Figure 5 Top view of the pull head.

[0028] In the figure: 401, moving block; 402, positioning block; 4021, notched groove; 403, inner socket; 404, driving wedge rod; 4041, oblique guide groove; 405, pulling head; 4051, matching blind hole; 4052, magnetic block; 4053, guide block; 406, radial through hole; 407, guide rod; 408, ear plate; 409, sleeve; 4010, hole adjustment piece; 4011, eccentric block; 4012, rotating plate; 4013, horizontal rod; 4014, horizontal groove; 4015, hook plate; 4016, arc guide groove. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0031] Example 1

[0032] like Figure 3 As shown, a slender thin-walled refrigeration system pipe hole extraction device includes:

[0033] The inner bell-and-spigot tube 403 has a driving wedge rod 404 that is slidably fitted inside the inner bell-and-spigot tube 403. A radial through hole 406 is provided on the side wall of the inner bell-and-spigot tube 403. A pulling head 405 is slidably fitted inside the radial through hole 406. The pulling head 405 is slidably fitted on the end of the driving wedge rod 404. The movement of the driving wedge rod 404 in the inner bell-and-spigot tube 403 drives the pulling head 405 to extend or retract inward or outward of the radial through hole 406.

[0034] The hole calibrating member 4010 is located directly above the radial through hole 406 and moves up and down relative to the vertical radial through hole 406 . The hole calibrating member 4010 is used to round the inner wall of the hole of the flanging of the pulling head 405 .

[0035] like Figure 5 As shown, the side wall of the end of the driving wedge rod 404 is provided with an oblique guide groove 4041, and the bottom of the pulling head 405 is provided with a guide block 4053, and the guide block 4053 and the oblique guide groove 4041 are slidably matched.

[0036] In this embodiment, the hole calibration member 4010 can be driven by a cylinder to move up and down to perform hole calibration operations.

[0037] The inner socket pipe 403 is socketed in the pipe. By driving the wedge rod 404 to move inward relative to the inner support pipe 403, the guide block 4053 is driven to move outward through the inclined guide groove 4041, thereby realizing flanging of the hole. The hole is a pre-punched elliptical hole. The hole correction piece 4010 is driven by the cylinder to shape the inner circle of the flanging to ensure that the roundness and axial size are as consistent as possible.

[0038] Example 2

[0039] In the device, Figure 3 As shown, it also includes a positioning block 402, a notch groove 4021 is provided on the positioning block 402, and a concave positioning structure is provided on the positioning block 402;

[0040] The positioning block 402 is slidably matched with a moving block 401 that moves away from or closer to the positioning block 402 . A limiting structure is provided on the moving block 401 . The positioning structure and the limiting structure are used for radial positioning of the pipe fitting.

[0041] The pipe fitting is placed in the limiting structure and moved together with the moving block 401 close to the positioning block 402, and the pipe fitting is fixed between the two. A cylinder is provided on the side of the moving block 401 facing away from the positioning block 402. The cylinder is used to move the moving block 401 closer to or farther away from the positioning block 402, thereby completing the radial positioning of the pipe fitting. The notch groove 4021 can ensure the position of the flange.

[0042] Example 3

[0043] In the device, the cylinder is not used to drive the hole correction member 4010 to move, and the following design is performed: Figures 4 to 9 As shown, the hole calibration member 4010 is located at the top of the notch groove 4021, and the vertical position of the hole calibration member 4010 relative to the notch groove 4021 is adjustable. The hole calibration member 4010 is installed with a forming part, a socket part, and a gradient part arranged between the forming part and the socket part.

[0044] The end of the pull head 405 is provided with a matching blind hole 4051 (eccentrically arranged at the top for the entry of the eccentric block 4011 and the socket part), and the matching blind hole 4051 and the socket part are adapted; the root of the matching blind hole 4051 is provided with a hooking groove and a magnetic block 4052 is provided in the groove, and the outside of the socket part is provided with an eccentric block 4011, and the magnetic block 4052 is used to adsorb the eccentric block 4011 so that the eccentric block 4011 is offset in the matching blind hole 4051 and forms a hooking structure with the hooking groove.

[0045] A sleeve 409 is installed on the outside of the hole calibration piece 4010, and an ear plate 408 is installed on the outside of the sleeve 409. A guide rod 407 is inserted into the ear plate 408, and the guide rod 407 is installed on the positioning block 402. A spring is installed between the ear plate 408 and the positioning block 402, and the spring is sleeved on the outside of the guide rod 407.

[0046] A rotating crown is provided on the top of the hole adjustment member 4010 , and the magnetic block 4052 and the eccentric block 4011 are separated by operating the rotating crown.

[0047] When the pulling head 405 is extended, the hole is flanging processed. When the flanging is completed, the socket part and the eccentric block 4011 enter the matching blind hole 4051 and are adsorbed under the action of the magnetic block 4052, so that the hole calibration piece 4010 rotates at a certain angle. After the rotation, the eccentric block forms a hooking structure in the hooking groove, and the pulling head 405 is retracted inward to drive the hole calibration piece 4010 to retract, completing the hole calibration operation, thereby realizing the efficient operation of extending the pulling hole and retracting the hole in one clamping.

[0048] Example 4

[0049] In the device, Figures 6 to 8 As shown, the movable block 401 is provided with an arc groove, and a rotating plate 4012 is slidably fitted in the arc groove. An avoidance groove is provided on the top of the rotating plate 4012, and the avoidance groove and the notch groove 4021 are surrounded by an outer forming area of ​​the flanging. When processing the outer flanging of the elliptical hole, the avoidance groove and the notch groove 4021 are used to surround the outer forming area of ​​the flanging to pull the tube wall of the flanging part, ensuring that the tube wall will not be greatly deformed, thereby being able to accurately control the end face height and the relatively uniform thickness of the flanging structure 1011.

[0050] A horizontal rod 4013 is installed on the top side of the rotating plate 4012, and a horizontal groove 4014 for positioning the horizontal rod 4013 is provided on the top side of the positioning block 402. A hook plate 4015 is rotatably installed on the side of the positioning block 402. The hook plate 4015 is used to hook the horizontal rod 4013 and be restricted in the horizontal groove 4014. An arc-shaped guide groove 4016 is provided on the rear side of the hook plate 4015, and a pin is installed in the arc-shaped guide groove 4016. The pin is installed on the side of the positioning block 402.

[0051] During use, after the pipe fitting is clamped, the horizontal rod 4013 is pushed up and entered into the horizontal groove 4014, and the hook plate 4015 is used to hook and restrict the horizontal rod 4013 into the horizontal groove 4014, thereby realizing the combination of the avoidance groove and the notch groove 4021 to ensure the molding quality. After all operations are completed, the hook plate 4015 is pushed up to separate it from the horizontal rod 4013, and the rotating plate 4012 is rotated down to reset it and the pipe fitting can be taken out.

[0052] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The replacements described may be partial structures, devices, or method steps, or they may be complete technical solutions. Any equivalent replacements or modifications based on the technical solution and the concept of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A slender thin-walled refrigeration system pipe pulling hole device, characterized in that: include: An inner bell-and-spigot pipe (403) is provided with a driving wedge rod (404) in a sliding manner inside the inner bell-and-spigot pipe (403). A radial through hole (406) is provided on the side wall of the inner bell-and-spigot pipe (403). A pulling head (405) is slidingly fitted in the radial through hole (406). The pulling head (405) is slidingly fitted on the end of the driving wedge rod (404). The movement of the driving wedge rod (404) in the inner bell-and-spigot pipe (403) drives the pulling head (405) to extend or retract in the radial through hole (406). The hole calibrating member (4010) is located directly above the radial through hole (406) and moves up and down relative to the vertical radial through hole (406). The hole calibrating member (4010) is used to round the inner wall of the hole of the flanging of the pulling head (405).

2. The device for extracting holes from slender, thin-walled refrigeration system pipes according to claim 1, characterized in that: The side wall of the end of the driving wedge rod (404) is provided with an oblique guide groove (4041), and the bottom of the pulling head (405) is provided with a guide block (4053), and the guide block (4053) and the oblique guide groove (4041) are slidably matched.

3. The device for extracting holes from slender, thin-walled refrigeration system pipes according to claim 1, characterized in that: It also includes a positioning block (402), the positioning block (402) is provided with a notch groove (4021), and the positioning block (402) is provided with a concave positioning structure; The positioning block (402) is slidably matched with a moving block (401) that moves away from or closer to the positioning block (402). A limiting structure is provided on the moving block (401). The positioning structure and the limiting structure are used for radial positioning of the pipe fitting.

4. The device for extracting holes from slender, thin-walled refrigeration system pipes according to claim 3, characterized in that: The hole calibration member (4010) is located at the top of the notch groove (4021), and the vertical position of the hole calibration member (4010) relative to the notch groove (4021) is adjustable. The hole calibration member (4010) is equipped with a forming portion, a socket portion, and a gradient portion arranged between the forming portion and the socket portion.

5. The device for extracting holes from slender, thin-walled refrigeration system pipes according to claim 4, characterized in that: The end of the pull head (405) is provided with a matching blind hole (4051), and the matching blind hole (4051) is adapted to the socket part; The root of the matching blind hole (4051) is provided with a hooking groove and a magnetic block (4052) is provided in the groove. An eccentric block (4011) is provided on the outside of the socket part. The magnetic block (4052) is used to absorb the eccentric block (4011) so that the eccentric block (4011) is offset in the matching blind hole (4051) to form a hooking structure.

6. The device for extracting holes from slender, thin-walled refrigeration system pipes according to claim 5, characterized in that: A sleeve (409) is installed on the outside of the hole calibration member (4010), an ear plate (408) is installed on the outside of the sleeve (409), a guide rod (407) is inserted into the ear plate (408), the guide rod (407) is installed on the positioning block (402), a spring is installed between the ear plate (408) and the positioning block (402), and the spring is sleeved on the outside of the guide rod (407).

7. The device for extracting holes from slender, thin-walled refrigeration system pipes according to claim 6, characterized in that: A rotating crown is provided on the top of the hole adjustment member (4010), and the magnetic block (4052) and the eccentric block (4011) are separated by operating the rotating crown.

8. The device for extracting holes from slender, thin-walled refrigeration system pipes according to claim 3, characterized in that: The movable block (401) is provided with an arc-shaped groove, in which a rotating plate (4012) is slidably fitted, a avoidance groove is provided on the top of the rotating plate (4012), and the avoidance groove and the notch groove (4021) are surrounded to form a flange outer molding area, and a horizontal rod (4013) is installed on the top side of the rotating plate (4012); A horizontal groove (4014) for positioning the horizontal rod (4013) is provided on one side of the top of the positioning block (402); a hook plate (4015) is rotatably installed on the side of the positioning block (402); the hook plate (4015) is used to hook the horizontal rod (4013) and be restricted in the horizontal groove (4014); an arc-shaped guide groove (4016) is provided on the rear side of the hook plate (4015); a pin is installed in the arc-shaped guide groove (4016); and the pin is installed on the side of the positioning block (402).

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