Circular steel tube jacket assembly

Abstract

The utility model relates to a circular steel tube jacket assembly, which comprises an outer sleeve body, an inner sleeve body and an outer sleeve body, and an accommodating cavity is formed in the center of the outer sleeve body; the inner sleeve body is fixed in the accommodating cavity; the outer limiting mechanism is installed on one side face of the inner sleeve body, and the distance between the outer limiting mechanism and the inner sleeve body is adjustable; the shrinkage limiting assembly is adjustably mounted in the inner sleeve body; when the shrinkage limiting assembly moves in the direction away from the outer limiting mechanism along the axis of the inner sleeve body, the inner diameter of the shrinkage limiting assembly is reduced. Otherwise, the inner diameter is increased. In this way, the inner diameter of the shrinkage limiting assembly can be adjusted by adjusting the distance between the outer limiting mechanism and the inner sleeve body, so that the circular steel pipe clamping sleeve assembly is clamped on the surface of a circular steel pipe of the corresponding size, and the precision and the firmness degree can both reach a very high degree.

Description

Technical Field

[0001] This utility model belongs to the field of machining auxiliary parts technology, and relates to a machining fixture, especially a round steel pipe clamping assembly. Background Technology

[0002] Round steel pipes refer to steel products that are open at both ends and have a hollow concentric circular cross-section, with a large ratio of length to circumference. The specifications of steel pipes are expressed by their external dimensions (such as outer diameter or side length), inner diameter, and wall thickness. Their size range is very wide, from very small capillary tubes to large round steel pipes with diameters of several meters. Round steel pipes can be used for piping, thermal equipment, machinery industry, oil and geological drilling, containers, chemical industry, and special applications. The surface of round steel pipes typically requires processing such as cleaning, pickling, passivation, heat treatment, and straightening.

[0003] Chinese utility model patent application number 201822030021.4 discloses a lifting clamp for round steel pipes, including a crossbeam, a first clamping block, a second clamping block, and a base support. The crossbeam has an elongated hole extending through its two opposite sides along its length. The first clamping block includes a first sliding sleeve and a first clamping part. The second clamping block includes a second sliding sleeve and a second clamping part. Both the first and second clamping parts have arc-shaped surfaces for clamping the round steel pipes. The two arc-shaped surfaces are opposite each other to form a cavity for inserting the round steel pipes. The first and second sliding sleeves are both sleeved on the crossbeam and slide along the length of the crossbeam. They are fixedly connected to the crossbeam by a screw passing through the elongated hole. The clamping part has an arc-shaped surface for clamping the round steel pipes. The base support is provided on the outer side of the clamping part of the first clamping block. A clamping groove is formed between the base support and the outer side of the clamping part of the first clamping block. The lower end of the second clamping part has a clamping plate extending towards the first clamping part. The clamping plate is inserted into the clamping groove. The diameter of the cavity of the clamping part used to clamp the round steel pipe can be adjusted by the sliding sleeve that moves along the crossbeam, making it suitable for round steel pipes of different diameters. However, this adjustment method has poor precision and is not suitable for machining fields with high precision requirements. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a round steel pipe clamping assembly.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a round steel pipe clamping assembly, which includes:

[0006] An outer shell, wherein a receiving cavity is provided at the center of the outer shell;

[0007] Inner sleeve, which is fixed inside the receiving cavity;

[0008] An external limiting mechanism is installed on one side of the inner sleeve and the distance between the external limiting mechanism and the inner sleeve is adjustable;

[0009] A compression limiting component is adjustablely installed in the inner sleeve body; when the compression limiting component moves along the axis of the inner sleeve body away from the outer limiting mechanism, its inner diameter decreases; conversely, its inner diameter increases.

[0010] Optimally, the inner sleeve includes a ring body and a convex ring formed on the inner surface of the ring body and spaced apart from the outer limiting mechanism. The inner surface of the ring body is an inclined surface, and its diameter gradually decreases in the direction away from the outer limiting mechanism. The compression assembly is adjustablely mounted on the convex ring.

[0011] Furthermore, the inner sleeve also includes a plurality of threaded holes that are opened on one end face of the ring body and are equally spaced apart, and the outer limiting mechanism includes a limiting ring plate disposed on the outside of the ring body and a plurality of fastening bolts installed on the limiting ring plate and cooperating with the threaded holes one by one.

[0012] Furthermore, the inner sleeve also includes a plurality of limiting holes that are formed on the convex ring and are equally spaced.

[0013] Furthermore, the compression limiting assembly includes multiple sets of compression limiting units spaced apart, each set of compression limiting units including an adjustment block and a guide rod fixed to the end face of the adjustment block and correspondingly passing through the limiting hole.

[0014] Furthermore, the surface of the adjustment block that contacts the ring body is a curved slope that matches the inner surface.

[0015] Furthermore, the size of the limiting hole is larger than the cross-sectional size of the guide rod.

[0016] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The round steel pipe clamping assembly of this utility model uses an outer sleeve, an inner sleeve, an outer limiting mechanism, and a compression limiting component with a specific structure to cooperate. In this way, the inner diameter of the compression limiting component can be adjusted by adjusting the distance between the outer limiting mechanism and the inner sleeve, so that the round steel pipe clamping assembly can be clamped on the surface of the round steel pipe of the corresponding size, and the accuracy and firmness can reach a very high level. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the round steel pipe clamp assembly of this utility model;

[0018] Figure 2 This is a side view of the inner sleeve in the round steel pipe clamp assembly of this utility model;

[0019] Figure 3 This is a cross-sectional view of the compression unit in the circular steel pipe clamp assembly of this utility model. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0021] like Figure 1 The circular steel pipe clamp assembly shown mainly includes a matching outer sleeve 1, an inner sleeve 2, an outer limiting mechanism 3, and a compression limiting component.

[0022] The outer sleeve 1 has a receiving cavity 11 at its center. The inner sleeve 2 is fixed inside the receiving cavity 11, and conventional fixing methods such as interference fit are acceptable. The outer limiting mechanism 3 is installed on one side of the inner sleeve 2, and the distance between it and the inner sleeve 2 is adjustable. The compression component is adjustablely installed inside the inner sleeve 2; when the compression component moves away from the outer limiting mechanism 3 along the axis of the inner sleeve 2, its inner diameter decreases; conversely, its inner diameter increases. By using a specific structure for the outer sleeve 1, inner sleeve 2, outer limiting mechanism 3, and compression component, the inner diameter of the compression component can be adjusted by changing the distance between the outer limiting mechanism 3 and the inner sleeve 2. This allows the round steel pipe clamping assembly to be clamped onto the surface of a round steel pipe of the corresponding size, achieving a high degree of precision and firmness.

[0023] In this embodiment, if Figure 2 As shown, the inner sleeve 2 includes a ring body 21 and a protruding ring 22 (usually integral with the ring body 21) formed on the inner surface 211 of the ring body 21 and spaced apart from the outer limiting mechanism 3. The protruding ring 22 is preferably located at the edge of the inner surface 211 of the ring body 21 away from the outer limiting mechanism 3, thus extending the stroke of the limiting component and increasing the degree of change in its inner diameter. The inner surface 211 of the ring body 21 is a slope (i.e., the inner surface 211 is generally frustum-shaped), and its diameter gradually decreases in the direction away from the outer limiting mechanism 3. The limiting component is adjustablely mounted on the protruding ring 22.

[0024] In this embodiment, the inner sleeve 2 also includes a plurality of threaded holes 23 (usually 3 to 6, the same below) that are opened on one end face of the ring body 21 and are equally spaced. The outer limiting mechanism 3 includes a limiting ring plate 31 disposed on the outside of the ring body 21 and a plurality of fastening bolts 32 that are installed on the limiting ring plate 31 and cooperate with the threaded holes 23 one by one. In this way, the distance between the outer limiting mechanism 3 and the inner sleeve 2 can be adjusted by the plurality of fastening bolts 32, or even the outer limiting mechanism 3 can be installed on the side of the inner sleeve 2.

[0025] In this embodiment, the inner sleeve 2 further includes a plurality of limiting holes 24 evenly spaced on the convex ring 22. The compression limiting assembly includes a plurality of sets of compression limiting units 4 spaced apart. Each set of compression limiting units 4 includes an adjusting block 41 and a guide rod 42 fixed to the end face of the adjusting block 41 and correspondingly passing through the limiting hole 24. Figure 3As shown, the surface 411 of the adjusting block 41 that contacts the ring body 21 is a curved slope that matches the inner surface 211. In addition, the size of the limiting hole 24 is larger than the cross-sectional size of the guide rod 42. This ensures that when the adjusting block 41 moves, the guide rod 42 can also move slightly in sync without being limited by the limiting hole 24.

[0026] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A circular steel pipe clamp assembly, characterized in that it include: The outer casing (1) has a receiving cavity (11) at its center; Inner sleeve (2), the inner sleeve (2) is fixed inside the receiving cavity (11); An outer limiting mechanism (3) is installed on one side of the inner sleeve (2) and the distance between the outer limiting mechanism (3) and the inner sleeve (2) is adjustable; A compression component is adjustablely installed inside the inner sleeve (2); when the compression component moves along the axis of the inner sleeve (2) in a direction away from the outer limiting mechanism (3), its inner diameter decreases; Conversely, its inner diameter increases.

2. The circular steel pipe clamp assembly according to claim 1, characterized in that: The inner sleeve (2) includes a ring body (21) and a protruding ring (22) formed on the inner surface (211) of the ring body (21) and spaced apart from the outer limiting mechanism (3). The inner surface (211) of the ring body (21) is an inclined surface, and its diameter gradually decreases in the direction away from the outer limiting mechanism (3). The compression assembly is adjustablely mounted on the protruding ring (22).

3. The round steel pipe clamp assembly according to claim 2, characterized in that: The inner sleeve (2) also includes a plurality of threaded holes (23) that are opened on one end face of the ring body (21) and are equally spaced. The outer limiting mechanism (3) includes a limiting ring plate (31) disposed on the outside of the ring body (21) and a plurality of fastening bolts (32) installed on the limiting ring plate (31) and cooperating with the threaded holes (23) one by one.

4. The round steel pipe clamp assembly according to claim 2, characterized in that: The inner sleeve (2) also includes a plurality of limiting holes (24) that are opened on the convex ring (22) and are equally spaced.

5. The round steel pipe clamp assembly according to claim 4, characterized in that: The compression assembly includes multiple sets of compression units (4) spaced apart. Each set of compression units (4) includes an adjustment block (41) and a guide rod (42) fixed on the end face of the adjustment block (41) and correspondingly passing through the limiting hole (24).

6. The round steel pipe clamp assembly according to claim 5, characterized in that: The surface (411) of the adjustment block (41) that contacts the ring body (21) is a curved slope that matches the inner surface (211).

7. The round steel pipe clamp assembly according to claim 5, characterized in that: The size of the limiting hole (24) is larger than the cross-sectional size of the guide rod (42).

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