CN219380424U - In-tube self-centering device - Google Patents

Abstract

The utility model discloses an in-pipe self-centering device, which comprises: the sliding block comprises a shell, a sliding block and a turntable, wherein at least 3 groove body structures for accommodating the sliding block are arranged on the shell, and the groove body structures are arranged at equal angles by taking the center of the shell as the center of a circle; each sliding block is arranged in the groove body structure, one end of each sliding block is in sliding fit with a sliding groove on the turntable through a connecting structure, and the other end of each sliding block is a free end; the rotary table is arranged in the shell and can rotate relative to the shell, a plurality of tension springs for driving the rotary table to rotate are arranged between the rotary table and the shell, and the rotary table can drive the sliding blocks to synchronously stretch and retract along the groove structures of the shell through rotation of the rotary table. The self-centering device in the pipe adopts the modes of the extension spring and the hollow rotary disc, so that the external dimension and the weight of the self-centering device are reduced.

Description

In-tube self-centering device

Technical Field

The utility model belongs to the technical field of pipe fitting measurement, and particularly relates to an in-pipe self-centering device.

Background

The existing self-centering device mainly adopts a compression spring to push a shaft with a conical round platform to move along the axial direction, the conical round platform pushes 3 sliding blocks which are uniformly distributed in the radial direction to slide in the radial direction synchronously through the matching of inclined planes, and when the sliding blocks are in contact with the pipe wall and the stress reaches balance, the self-centering process is completed. When the pipe diameter is changed or the section shape in the pipe is changed, the sliding blocks move simultaneously and reach an equilibrium state again.

For larger pipe fittings, the existing self-centering device has large external dimension and weight due to the fact that a shaft with a conical round table is needed, and the self-centering device is inconvenient to use.

Disclosure of Invention

The utility model aims at: in order to overcome the problems in the prior art, the utility model discloses an in-pipe self-centering device.

The aim of the utility model is achieved by the following technical scheme:

an in-tube self-centering device, the in-tube self-centering device comprising: the sliding block comprises a shell, a sliding block and a turntable, wherein at least 3 groove body structures for accommodating the sliding block are arranged on the shell, and the groove body structures are arranged at equal angles by taking the center of the shell as the center of a circle; each sliding block is arranged in the groove body structure, one end of each sliding block is in sliding fit with a sliding groove on the turntable through a connecting structure, and the other end of each sliding block is a free end; the rotary table is arranged in the shell and can rotate relative to the shell, a plurality of tension springs for driving the rotary table to rotate are arranged between the rotary table and the shell, and the rotary table can drive the sliding blocks to synchronously stretch and retract along the groove structures of the shell through rotation of the rotary table.

According to a preferred embodiment, the self-centering device further comprises a rotational connection arranged between the housing and the turntable.

According to a preferred embodiment, the rotary connection comprises a rotary bearing, the turntable being fixed to the inner ring of the bearing via an end stop ring; the bearing completes the position fixation between the bearing and the shell through the positioning ring and the front cover arranged on the outer side of the end face baffle ring.

According to a preferred embodiment, the rotary joint is a double bearing arrangement.

According to a preferred embodiment, the housing is of annular configuration.

According to a preferred embodiment, the groove structures on the housing are arranged radially to the housing.

According to a preferred embodiment, the slide forms a sliding fit with a slide groove on the turntable via a cylindrical boss.

According to a preferred embodiment, at least 3 tension springs are provided between the turntable and the housing.

According to a preferred embodiment, the tension springs are arranged at equal angles with the center of the housing or the turntable as the center of the circle.

According to a preferred embodiment, the tension springs are arranged tangentially to the turntable.

The foregoing inventive concepts and various further alternatives thereof may be freely combined to form multiple concepts, all of which are contemplated and claimed herein. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or all of the present disclosure.

The utility model has the beneficial effects that: the self-centering device in the pipe has a simple structure, and can effectively reduce the weight of the self-centering device for large-diameter pipe fittings; the smooth slider design can greatly reduce the resistance of the self-centering device to movement in the tube.

Drawings

FIG. 1 is a front view of the in-tube self-centering device of the present utility model;

FIG. 2 is a schematic view in section A-A of FIG. 1;

FIG. 3 is a schematic illustration of the connection of the housing of the self-centering device in the pipe of the present utility model to the turntable;

FIG. 4 is a schematic view of the working state of the self-centering device in the pipe of the present utility model;

the device comprises a 1-shell, a 2-sliding block, a 3-rear cover, a 4-turntable, a 5-rotating connecting piece, a 6-positioning ring, a 7-end face baffle ring, an 8-front cover, a 9-tension spring, a 10-screw and an 11-pipe fitting.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, in the present utility model, if a specific structure, connection relationship, position relationship, power source relationship, etc. are not specifically written, the structure, connection relationship, position relationship, power source relationship, etc. related to the present utility model can be known by those skilled in the art without any creative effort.

Example 1:

referring to fig. 1 to 4, the present embodiment discloses an in-tube self-centering device comprising: the device comprises a shell 1, a sliding block 2, a rotary table 4 and a rotary connecting piece 5.

Preferably, at least 3 groove structures for accommodating the sliding block 2 are arranged on the shell 1, and each groove structure is arranged at equal angles by taking the center of the shell 1 as the center of a circle.

Further, the shell 1 has a circular ring structure. Each groove structure on the shell 1 is arranged along the radial direction of the shell 1. So as to realize the movement of the sliding block 2 in the radial direction of the circular ring of the shell 1, thereby ensuring that the sliding block 2 has the maximum effective stroke and can complete the effective centering of the pipe fittings 11 with various diameters.

Preferably, each sliding block 2 is arranged in the groove body structure, one end of each sliding block is in sliding fit with the sliding groove on the turntable 4 through the connecting structure, and the other end of each sliding block is a free end. The surface of the sliding block is of an arc smooth structure. Specifically, the sliding block 2 forms a sliding fit with a sliding groove on the turntable 4 through a cylindrical boss.

Preferably, the turntable 4 is disposed in the housing 1 and is rotatable relative to the housing 1.

Further, the rotating connection 5 is arranged between the housing 1 and the turntable 4, and the turntable 4 is rotated relative to the housing 1 via the rotating connection 5. In this embodiment, the rotary joint 5 is a double bearing arrangement arranged side by side.

Preferably, the turntable 4 is fixed to the inner ring of the bearing via an end stop ring 7. The bearing completes the position fixation between the bearing and the shell 1 through the positioning ring 6 and the front cover 8 arranged outside the end face baffle ring 7.

Preferably, a plurality of tension springs 9 for driving the turntable 4 to rotate are arranged between the turntable 4 and the shell 1, and can drive each sliding block 2 to synchronously perform telescopic movement along each groove structure of the shell 1 through the rotation of the turntable 4.

Preferably, in this embodiment, 3 tension springs 9 are provided between the turntable 4 and the housing 1. The tension springs 9 are arranged at equal angles with the center of the shell 1 or the turntable as the center of a circle. By the arrangement of a proper number of tension springs 9, the driving force of the turntable 4 is ensured and the structure is simplified.

Preferably, each tension spring 9 is arranged in a tangential direction of the turntable 4. Through the direction setting of extension spring 9, guaranteed the effective conversion of pulling force to in effective stretching interval, provide the more rotation stroke of carousel.

Specifically, one end of the tension spring 9 is fixed to the housing 1 by a screw 10, and the other end is fixed to the turntable by the screw 10. The cylindrical bosses of the 3 sliding blocks 2 form sliding fit with the 3 sliding grooves on the rotary table 4, and when the rotary table 4 rotates, the 3 sliding blocks 2 synchronously generate radial movement. Under the action of the 3 tension springs 9, the rotary table 4 rotates clockwise, the sliding groove of the rotary table 4 pushes the 3 sliding blocks 2 to move along the radial direction, and when the sliding blocks 2 are in contact with the inner wall of the pipe fitting 11 and reach the stress balance, the self-centering process is completed.

The self-centering device in the pipe has a simple structure, and can effectively reduce the weight of the self-centering device for large-diameter pipe fittings; the smooth slider design can greatly reduce the resistance of the self-centering device to movement in the tube.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. An in-tube self-centering device, the in-tube self-centering device comprising: a shell (1), a sliding block (2) and a rotary table (4),

at least 3 groove body structures for accommodating the sliding blocks (2) are arranged on the shell (1), and all the groove body structures are arranged at equal angles by taking the center of the shell (1) as the center of a circle;

each sliding block (2) is arranged in the groove body structure, one end of each sliding block is in sliding fit with a sliding groove on the turntable (4) through a connecting structure, and the other end of each sliding block is a free end;

the rotary table (4) is arranged in the shell (1) and can rotate relative to the shell (1), a plurality of tension springs (9) used for driving the rotary table (4) to rotate are arranged between the rotary table (4) and the shell (1), and the rotary table can drive the sliding blocks (2) to synchronously stretch along the groove structures of the shell through rotation of the rotary table (4).

2. The in-tube self-centering device according to claim 1, further comprising a rotational connection (5), the rotational connection (5) being arranged between the housing (1) and the turntable (4).

3. The in-tube self-centering device according to claim 2, characterized in that the rotary connection (5) comprises a rotary bearing, the turntable (4) being fixed to the inner ring of the bearing via an end stop ring (7);

the bearing is fixed with the housing (1) through a positioning ring (6) and a front cover (8) arranged on the outer side of an end face baffle ring (7).

4. An in-tube self-centering device as claimed in claim 3, characterized in that the swivel connection (5) is of a double bearing construction.

5. The in-tube self-centering device according to claim 1, wherein the housing (1) is of annular configuration.

6. The in-tube self-centering device according to claim 5, characterized in that the groove structures on the housing (1) are arranged radially along the housing (1).

7. The self-centering device in a pipe according to claim 5, characterized in that the slide (2) is in sliding fit with a slide groove on the turntable (4) via a cylindrical boss.

8. The self-centering device in a pipe according to claim 1, characterized in that at least 3 tension springs (9) are arranged between the turntable (4) and the housing (1).

9. The self-centering device in a pipe according to claim 1, characterized in that the tension springs (9) are arranged at equal angles with the center of the housing (1) or the turntable (4) as the center of the circle.

10. The in-tube self-centering device according to claim 1, characterized in that the tension springs (9) are arranged tangentially to the turntable (4).