Lock ball structure of centralizer

Abstract

The utility model discloses a centralizer ball locking structure which comprises six arc-shaped protrusions arranged on the surface of a centralizer body in an annular array mode, two hole bodies are formed in the surfaces of the arc-shaped protrusions, and bead embedding sleeve bodies are stuffed into inner cavities of the hole bodies. A tensioning groove is formed in the side, close to an inner cavity of the hole body, of the bead embedding sleeve body, and a circular plate is arranged on the side, close to the inner cavity of the hole body, of the bead embedding sleeve body. The bead embedding sleeve body is taken up and stuffed into the inner cavity of the hole body until the circular plate abuts against the deep position of the inner cavity of the hole body, then the bead embedding sleeve body continues to be knocked, the bead embedding sleeve body goes deep, and the deeper the tensioning ring enters the inner cavity of the tensioning groove, the larger the deformation of the surface of the bead embedding sleeve body is. The sawtooth grooves firmly abut against the inner wall of the hole body, tensioning type fixing is achieved, and the purposes that the bead embedding sleeve is matched with the expansion structure, the outer side of the bead embedding sleeve is firmly attached to the inner wall of the hole, and the fixing firmness degree of the bead embedding sleeve is improved are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of centralizers, and particularly relates to a centralizer lock ball structure. Background Technique

[0002] The double-layer ball-type centralizer belongs to one kind of centralizers. The balls on the surface of the double-layer ball-type centralizer are installed in the holes on the outer side of the centralizer by using a bead sleeve. The bead sleeve is fixed in the hole by the frictional force on its surface, and the firmness is not good. Therefore, we have designed a centralizer lock ball structure. The bead sleeve is matched with an expansion structure, so that the outer side of the bead sleeve firmly fits against the inner wall of the hole, improving the firmness of the bead sleeve fixation. Content of the Utility Model

[0003] The purpose of the utility model is to provide a centralizer lock ball structure, which has the advantage that the bead sleeve is matched with an expansion structure, so that the outer side of the bead sleeve firmly fits against the inner wall of the hole, improving the firmness of the bead sleeve fixation, so as to solve the above-mentioned background technical problems.

[0004] The technical solution of the utility model for solving the above technical problems is as follows: A centralizer lock ball structure includes six arc-shaped protrusions arranged in a circular array on the surface of a centralizer body: Two hole bodies are opened on the surface of the arc-shaped protrusion, a bead sleeve body is inserted into the inner cavity of the hole body, a tension groove is opened on one side of the bead sleeve body close to the inner cavity of the hole body, a circular plate is arranged on one side of the bead sleeve body close to the inner cavity of the hole body, a tension ring extending into the inner cavity of the tension groove is fixedly connected to one side of the circular plate close to the bead sleeve body, a ball body is placed in the inner cavity of the bead sleeve body, and multiple sawtooth grooves fitting with the inner wall of the hole body are opened on the surface of the bead sleeve body.

[0005] Preferably, a plurality of annular grooves are opened on the surface of the bead sleeve body, and the plurality of annular grooves are located on one side of the sawtooth groove.

[0006] Preferably, a plurality of notches communicating with the tension groove are opened on the surface of the bead sleeve body in a circular array.

[0007] Preferably, a first wedge surface is arranged on the outer surface of the tension ring, and a second wedge surface adapted to the first wedge surface is arranged on the outer side of the inner cavity of the tension groove.

[0008] Preferably, a round hole is opened on one side of the circular plate, and the diameter of the round hole is smaller than the diameter of the ball body.

[0009] The beneficial effects of the utility model are:

[0010] 1. By picking up the bead - set body and inserting it into the inner cavity of the hole body until the circular plate abuts against the deep part of the inner cavity of the hole body, and then continuously knocking on the bead - set body to make the bead - set body penetrate deeper. The deeper the tensioning ring enters the inner cavity of the tensioning groove, the greater the deformation of the surface of the bead - set body will be, making the serrated groove firmly abut against the inner wall of the hole body to achieve tension - type fixation. Thus, the cooperation between the bead - set and the expansion structure can be realized, making the outer side of the bead - set firmly fit against the inner wall of the hole, and achieving the purpose of improving the firmness of the bead - set fixation.

[0011] 2. Through the setting of the notch, the part of the end of the bead - set body that expands outward is prone to deformation, which facilitates the realization of the tension - type fixation of the bead - set body.

[0012] 3. Through the setting of the round hole, the ball body can extend through the round hole to a part outside the circular plate. The round hole can play a limiting role on the ball body without restricting the rotation of the ball body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Through the detailed description in combination with the following drawings, the above - mentioned and / or other advantages of the present utility model will become clearer and easier to understand. These drawings are only schematic and do not limit the present utility model, where:

[0014] Figure 1 is a three - dimensional schematic diagram of an embodiment of the present utility model;

[0015] Figure 2 is a front - view sectional schematic diagram of a partial structure of an embodiment of the present utility model;

[0016] Figure 3 is a three - dimensional exploded schematic diagram of the bead - set body and the tensioning ring of an embodiment of the present utility model.

[0017] In the drawings, the list of components represented by each reference numeral is as follows:

[0018] 1. Centralizer body, 2. Arc - shaped protrusion, 3. Hole body, 4. Bead - set body, 5. Tensioning groove, 6. Notch, 7. Circular plate, 8. Tensioning ring, 9. Ball body, 10. Serrated groove, 11. Annular groove, 12. First wedge - shaped surface, 13. Second wedge - shaped surface, 14. Round hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Hereinafter, embodiments of the centralizer lock - ball structure of the present utility model will be described with reference to the drawings.

[0020] Figures 1-3The ball locking structure of the centralizer according to an embodiment of the present invention is shown, which includes six arc-shaped protrusions 2 arranged in an annular array on the surface of the centralizer body 1: two hole bodies 3 are opened on the surface of the arc-shaped protrusion 2, a bead sleeve body 4 is inserted into the inner cavity of the hole body 3, a tension groove 5 is opened on one side of the bead sleeve body 4 close to the inner cavity of the hole body 3, and a plurality of notches 6 communicating with the tension groove 5 are opened on the surface of the bead sleeve body 4 in an annular array. Through the arrangement of the notches 6, the part of the end of the bead sleeve body 4 that expands outward is likely to deform, so as to facilitate the tension-type fixation of the bead sleeve body 4. A circular plate 7 is arranged on one side of the bead sleeve body 4 close to the inner cavity of the hole body 3. A tension ring 8 extending into the inner cavity of the tension groove 5 is fixedly connected to one side of the circular plate 7 close to the bead sleeve body 4. A circular hole 14 is opened on one side of the circular plate 7, and the diameter of the circular hole 14 is smaller than the diameter of the ball body 9. Through the arrangement of the circular hole 14, the ball body 9 can extend through the circular hole 14 to a part outside the circular plate 7. The circular hole 14 can limit the ball body 9 without restricting the rotation of the ball body 9. The ball body 9 is placed in the inner cavity of the bead sleeve body 4. A first wedge surface 12 is arranged on the outer surface of the tension ring 8, and a second wedge surface 13 adapted to the first wedge surface 12 is arranged on the outer side of the inner cavity of the tension groove 5. A plurality of sawtooth grooves 10 that fit against the inner wall of the hole body 3 are opened on the surface of the bead sleeve body 4. A plurality of annular grooves 11 are opened on the surface of the bead sleeve body 4, and the plurality of annular grooves 11 are located on one side of the sawtooth grooves 10.

[0021] Working principle: When the present invention is used, the user places the ball body 9 in the inner cavity of the bead sleeve body 4, then picks up the circular plate 7, so that the tension ring 8 is inserted into the inner cavity of the tension groove 5 to limit the ball body 9, and then picks up the bead sleeve body 4 and inserts it into the inner cavity of the hole body 3 until the circular plate 7 abuts against the deep part of the inner cavity of the hole body 3. Then, the bead sleeve body 4 is continuously tapped to make the bead sleeve body 4 penetrate deeper. The deeper the tension ring 8 enters the inner cavity of the tension groove 5, the greater the deformation of the surface of the bead sleeve body 4 will be, so that the sawtooth grooves 10 on the surface of the bead sleeve body 4 firmly abut against the inner wall of the hole body 3, realizing tension-type fixation and increasing the firmness between the bead sleeve body 4 and the inner wall of the hole body 3.

[0022] In summary: For this ball locking structure of the centralizer, by picking up the bead sleeve body 4 and inserting it into the inner cavity of the hole body 3 until the circular plate 7 abuts against the deep part of the inner cavity of the hole body 3, and then continuously tapping the bead sleeve body 4 to make the bead sleeve body 4 penetrate deeper. The deeper the tension ring 8 enters the inner cavity of the tension groove 5, the greater the deformation of the surface of the bead sleeve body 4 will be, so that the sawtooth grooves 10 firmly abut against the inner wall of the hole body 3, realizing tension-type fixation, and thus the purpose of matching the bead sleeve with the expansion structure can be achieved, making the outer side of the bead sleeve firmly fit against the inner wall of the hole and improving the firmness of the bead sleeve fixation.

Claims

1. A centralizer locking ball structure, characterized in that: The invention comprises six arc-shaped protrusions (2) arranged in an annular array on the surface of a centralizer body (1): two hole bodies (3) are provided on the surface of the arc-shaped protrusions (2); a bead-set body (4) is inserted into the inner cavity of the hole body (3); a tensioning groove (5) is provided on the side of the bead-set body (4) close to the inner cavity of the hole body (3); a circular plate (7) is provided on the side of the bead-set body (4) close to the inner cavity of the hole body (3); a tensioning ring (8) extending to the inner cavity of the tensioning groove (5) is fixedly connected to the side of the circular plate (7) close to the bead-set body (4); a ball body (9) is placed in the inner cavity of the bead-set body (4); and a plurality of sawtooth grooves (10) are provided on the surface of the bead-set body (4) that fit the inner wall of the hole body (3).

2. A centralizer locking ball structure according to claim 1, characterized in that: A plurality of annular grooves (11) are provided on the surface of the bead-set body (4), and the plurality of annular grooves (11) are located on one side of the sawtooth groove (10).

3. A centralizer locking ball structure according to claim 2, characterized in that: A plurality of notches (6) communicating with the tensioning groove (5) are formed in an annular array on the surface of the bead-inserting sleeve body (4).

4. A centralizer locking ball structure according to claim 3, characterized in that: The outer surface of the tensioning ring (8) is provided with a wedge-shaped surface 1 (12), and the outer side of the inner cavity of the tensioning groove (5) is provided with a wedge-shaped surface 2 (13) matched with the wedge-shaped surface 1 (12).

5. A centralizer locking ball structure according to claim 4, characterized in that: A circular hole (14) is provided on one side of the circular plate (7), and the diameter of the circular hole (14) is smaller than the diameter of the ball body (9).

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