Accurate internal expansion clamp holder for pipe fitting

Abstract

The utility model belongs to the technical field of pipe fitting internal expansion, and particularly discloses a precise pipe fitting internal expansion clamp holder which comprises an installation frame, a clamping assembly used for internal expansion of a local section of a pipe fitting is arranged in the installation frame, and the clamping assembly comprises an installation disc fixedly clamped in the installation frame. A plurality of arc-shaped clamping blocks moving along the axis of the mounting disc are slidably connected to the surface of the mounting disc, a limiting ring is fixedly connected to the side wall of the side, away from the mounting disc, of the mounting frame, and an adjusting ring is slidably connected to the position, between the mounting disc and the limiting ring, of the mounting frame; the outer side of the mounting frame is fixedly connected with a plurality of sets of protection structures used for protecting the remaining sections of the pipe fitting through fixing rods. The distance between the arc-shaped blocks can be adjusted in the local internal expansion process of the pipe fitting, so that the requirement for the local internal expansion size of the pipe fitting is met, and the flexibility of a product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pipe fitting internal expansion, in particular to pipe fitting precision internal expansion holder. BACKGROUND

[0002] Pipe fitting internal expansion is a stamping forming process, by high pressure liquid or gas in the pipe fitting inside, force pipe fitting to occur plastic deformation, in the pipe fitting internal expansion process, clamping can ensure the stability and accuracy of pipe fitting in the processing process, avoid pipe fitting under the action of internal pressure and move or deformation, clamping can also ensure that pipe fitting in the processing process will not deviate from the predetermined position due to vibration or external force, guarantee the smooth progress of the processing process.

[0003] There are many pipe fitting internal expansion clamping devices on the market, for example, a kind of internal expansion type clamping device for pipe fitting machining with publication number CN218134515U, including lengthening sleeve, inner pull rod and expansion assembly, the inner pull rod is sleeved in lengthening sleeve and can move left and right relative to lengthening sleeve, the expansion assembly is installed at one end of the inner pull rod and extends into the pipe fitting, first elastic member is installed at the other end of the inner pull rod and deforms along the axial direction with the movement of the inner pull rod, the expansion assembly includes expansion sheet and second elastic member, the second elastic member deforms along the radial direction of the inner pull rod, one end of the second elastic member is fixedly connected with the expansion sheet, the other end of the second elastic member is fixedly connected with the inner pull rod.

[0004] The product is simple in structure and convenient to operate, which is favorable for further reducing labor cost and manufacturing cost while achieving the purpose of clamping pipe fitting, but only partial internal expansion of pipe fitting may be needed in the processing process, and the rest remains unchanged, and the internal expansion diameters of certain pipe fitting regions may be inconsistent, clamping the whole pipe fitting may affect the deformation region of the pipe fitting, thereby failing to meet specific use requirements, therefore, the pipe fitting precision internal expansion holder is provided. UTILITY MODEL CONTENTS

[0005] In view of the above defects or deficiencies in the prior art, it is desirable to provide a pipe fitting precision internal expansion holder.

[0006] In the first aspect, the application provides a pipe fitting precision internal expansion holder, which comprises a mounting frame, a clamping assembly for local section internal expansion of pipe fitting is arranged in the mounting frame, the clamping assembly comprises a mounting disc fixedly connected in the mounting frame, the surface of the mounting disc is slidably connected with a plurality of arc-shaped clamping blocks moving along the axis thereof, the side wall of the mounting frame away from the mounting disc is fixedly connected with a limiting ring, the mounting frame is slidably connected with an adjusting ring between the mounting disc and the limiting ring, and the outer side of the mounting frame is fixedly connected with a plurality of groups of protection structures for protecting the remaining sections of the pipe fitting through fixing rods.

[0007] According to the technical scheme provided by the embodiment of the application, one end of the arc-shaped clamping block is fixedly connected with a sliding block, the surface of the mounting disc is provided with a plurality of grooves, and the sliding block slides in the grooves.

[0008] According to the technical scheme provided by the embodiment of the application, the middle part of the sliding block is screw-connected with a first screw rod, the first screw rod is rotationally connected with the grooves through bearings, and one end of the first screw rod away from the axis of the mounting disc is coaxially connected with a torsion block.

[0009] According to the technical scheme provided by the embodiment of the application, the surface of the mounting disc is oppositely provided with a second screw rod and a limiting rod, the surface of the mounting disc is provided with a threaded hole, the second screw rod is rotationally connected with the mounting disc, and the second screw rod is screw-connected with the adjusting ring.

[0010] According to the technical scheme provided by the embodiment of the application, the limiting rod is slidingly connected with the adjusting ring, one end of the limiting rod away from the mounting disc is fixedly connected to the surface of the limiting ring through a screw, and the second screw rod penetrates through the side wall of the mounting disc and is coaxially connected with a handle.

[0011] According to the technical scheme provided by the embodiment of the application, the protective structure comprises a mounting ring, the outer wall of the mounting ring is fixedly connected with a containing cavity, the containing cavity is slidingly connected with a sliding rod, and one end of the sliding rod away from the containing cavity penetrates through the side wall of the mounting ring and is fixedly connected with a protective sheet.

[0012] According to the technical scheme provided by the embodiment of the application, a spring is clamped between the inner side wall of the mounting ring and the protective sheet, the spring is sleeved outside the sliding rod, and two adjacent mounting rings are fixedly connected through symmetrically arranged connecting rods.

[0013] To sum up, the technical scheme specifically discloses a pipe precise inner expansion clamping device, which comprises a mounting frame, a clamping assembly, a protective structure and the like; a plurality of arc-shaped clamping blocks can freely move along the axis, the inner wall of the pipe is clamped in the process of inner expansion of the pipe, and the adjusting ring can slide between the limiting ring and the mounting disc, so that the spacing between the plurality of arc-shaped clamping blocks can be adjusted in the process of local inner expansion of the pipe, the size requirement of local inner expansion of the pipe is met, and the flexibility of the product is improved; the sliding rod slides in the sliding cavity and is fixedly connected with the protective sheet, so that the remaining section of the pipe can be prevented from being scratched and damaged in the process of local inner expansion of the pipe, and the quality of the pipe inner expansion is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Other characteristics, objects and advantages of the application will become more apparent upon reading the following detailed description of non-restrictive embodiments made with reference to the attached drawings:

[0015] Figure 1 It is the whole structure schematic view of the utility model;

[0016] Figure 2 It is the clamping assembly schematic view in the utility model;

[0017] Figure 3 It is the local structure schematic view in the utility model;

[0018] Figure 4 It is the protection structure schematic view in the utility model.

[0019] In the drawing: 1, mounting frame; 2, clamping assembly; 21, mounting disc; 210, recess; 211, threaded hole; 22, first lead screw; 23, arc clamping block; 231, sliding block; 24, limiting ring; 25, adjusting ring; 26, second lead screw; 27, handle; 28, limiting rod; 3, fixed rod; 4, protection structure; 41, mounting ring; 42, protection sheet; 43, sliding rod; 44, accommodating cavity; 45, spring; 5, connecting rod. DETAILED DESCRIPTION

[0020] The application will be further described below in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not limited to the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0021] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0022] Please refer to Figures 1-4 , the pipe precision inner expansion clamp includes a mounting frame 1, the mounting frame 1 is provided with a clamping assembly 2 for the inner expansion of the local section of the pipe, the clamping assembly 2 includes a mounting disc 21 fixedly clamped in the mounting frame 1, the surface of the mounting disc 21 is slidably connected with a plurality of arc clamping blocks 23 moving along the axis thereof, the side wall of the mounting frame 1 away from the mounting disc 21 is fixedly connected with a limiting ring 24, the mounting frame 1 is slidably connected with an adjusting ring 25 between the mounting disc 21 and the limiting ring 24, the outer side of the mounting frame 1 is fixedly connected with a plurality of protection structures 4 for protecting the remaining section of the pipe through a fixed rod 3, a plurality of arc clamping blocks 23 can be freely moved along the axis, the inner wall of the pipe is clamped during the inner expansion of the pipe, and the adjusting ring 25 is slidably connected between the limiting ring 24 and the mounting disc 21, the spacing between a plurality of arc clamping blocks 23 can be adjusted during the local inner expansion of the pipe, so as to meet the size requirement of the local inner expansion of the pipe and improve the flexibility of the product.

[0023] In this embodiment, one end of the arc-shaped clamping block 23 is fixedly connected with a sliding block 231, the surface of the mounting disc 21 is provided with a plurality of grooves 210, and the sliding block 231 slides in the groove 210, facilitating normal use of the structure.

[0024] It should be noted that the middle part of the sliding block 231 is threadedly connected with a first lead screw 22, the first lead screw 22 is rotatably connected with the groove 210 through a bearing, and a torsion block is coaxially connected with one end of the first lead screw 22 away from the axis of the mounting disc 21. The position of the arc-shaped clamping block 23 on the mounting disc 21 can be adjusted through the corresponding sliding block 231, so that the inner expansion process of the local section of the pipe fitting can be performed according to special requirements, and the flexibility of the product is improved.

[0025] It should be noted that the surface of the mounting disc 21 is provided with a second lead screw 26 and a limiting rod 28 in opposite positions, the surface of the mounting disc 21 is provided with a threaded hole 211, the second lead screw 26 is rotatably connected with the mounting disc 21, and the second lead screw 26 is threadedly connected with the adjusting ring 25, facilitating normal use of the structure.

[0026] Further, the limiting rod 28 is slidably connected with the adjusting ring 25, one end of the limiting rod 28 away from the mounting disc 21 is fixedly connected to the surface of the limiting ring 24 through a screw, the second lead screw 26 penetrates through the side wall of the mounting disc 21 and is coaxially connected with a handle 27, and the distance between the adjusting ring 25 and the mounting disc 21 and the limiting ring 24 is adjusted through the handle 27, so as to meet the requirement of the pipe fitting for quickly clamping the inner wall size.

[0027] Then, the protective structure 4 includes a mounting ring 41, the outer wall of the mounting ring 41 is fixedly connected with a containing cavity 44, the containing cavity 44 is slidably connected with a sliding rod 43, one end of the sliding rod 43 away from the containing cavity 44 penetrates through the side wall of the mounting ring 41 and is fixedly connected with a protective sheet 42, and the remaining section of the pipe fitting is protected by the plurality of protective sheets 42, so as to prevent scratches and damage caused by sudden loosening of the pipe fitting during the inner expansion process.

[0028] Next, a spring 45 is arranged between the inner side wall of the mounting ring 41 and the protective sheet 42, the spring 45 is arranged outside the sliding rod 43, and the adjacent two mounting rings 41 are fixedly connected through the symmetrically arranged connecting rods 5, facilitating normal use of the structure.

[0029] Working principle: when using the pipe fitting precision inner expansion clamp, the user first inserts one end of the pipe fitting into the mounting frame 1, then adjusts the distance between the arc-shaped clamping block 23 and the axis of the mounting disc 21 by rotating the first lead screw 22, and then moves the position of the adjusting ring 25 by rotating the handle 27 when the arc-shaped clamping block 23 clamps the inner wall of the pipe fitting.

[0030] The above description is merely the preferred embodiments of the present application and the technical principles used. It should be understood by those skilled in the art that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combinations of the technical features described above or their equivalent features without departing from the concept of the utility model. For example, the technical solutions formed by replacing the above features with the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. A pipe fitting precision internal expansion clamp, including a mounting frame (1), characterized in that: The mounting frame (1) is provided with a clamping assembly (2) for local expansion of the pipe fitting. The clamping assembly (2) includes a mounting disc (21) fixedly clamped in the mounting frame (1). Several arc-shaped clamping blocks (23) that move along the axis of the mounting disc (21) are slidably connected to the surface of the mounting disc (21). A limiting ring (24) is fixedly connected to the side wall of the mounting frame (1) away from the mounting disc (21). An adjusting ring (25) is slidably connected between the mounting disc (21) and the limiting ring (24). Several sets of protective structures (4) for protecting the remaining section of the pipe fitting are fixedly connected to the outside of the mounting frame (1) by a fixing rod (3).

2. The pipe fitting precision internal expansion clamp according to claim 1, characterized in that: One end of the arc-shaped clamping block (23) is fixedly connected to a slider (231), and the surface of the mounting disc (21) is provided with several grooves (210), and the slider (231) slides in the grooves (210).

3. The pipe fitting precision internal expansion clamp according to claim 2, characterized in that: The middle part of the slider (231) is threaded with a first lead screw (22), and the first lead screw (22) is rotatably connected to the groove (210) through a bearing. The end of the first lead screw (22) away from the axis of the mounting disc (21) is coaxially connected with a torsion block.

4. The pipe fitting precision internal expansion clamp according to claim 1, characterized in that: The mounting disc (21) is provided with a second lead screw (26) and a limiting rod (28) opposite to each other on its surface. The mounting disc (21) is provided with a threaded hole (211). The second lead screw (26) is rotatably connected to the mounting disc (21) and is threadedly connected to the adjusting ring (25).

5. The pipe fitting precision internal expansion clamp according to claim 4, characterized in that: The limiting rod (28) is slidably connected to the adjusting ring (25). The end of the limiting rod (28) away from the mounting disc (21) is fixedly connected to the surface of the limiting ring (24) by a screw. The second lead screw (26) passes through the side wall of the mounting disc (21) and is coaxially connected to the handle (27).

6. The pipe fitting precision internal expansion clamp according to claim 1, characterized in that: The protective structure (4) includes a mounting ring (41), the outer wall of which is fixedly connected to a receiving cavity (44), and a sliding rod (43) is slidably connected inside the receiving cavity (44). One end of the sliding rod (43) away from the receiving cavity (44) passes through the side wall of the mounting ring (41) and is fixedly connected to a protective plate (42).

7. The pipe fitting precision internal expansion clamp according to claim 6, characterized in that: A spring (45) is sandwiched between the inner wall of the mounting ring (41) and the protective plate (42). The spring (45) is sleeved on the outside of the slide rod (43). Two adjacent mounting rings (41) are fixedly connected by symmetrically arranged connecting rods (5).

Images