Internal expansion type rubber sealing ring

Abstract

The utility model discloses an internal expansion type rubber sealing ring which comprises a rubber ring arranged in a first pipe body and a second pipe body, an internal thread is arranged on the annular face of the inner side of the rubber ring, an internal expansion mechanism used for opening the rubber ring in a threaded connection mode can be arranged in the internal thread, and the internal expansion mechanism comprises an internal expansion pipe. The internal expansion pipe comprises a large opening end, a small opening end and a bevel section, an operating rod used for rotating the internal expansion pipe is fixedly arranged in the internal expansion pipe, external threads are arranged on the annular face of the outer side of the internal expansion pipe, the external threads are only arranged at the large opening end and the small opening end, and through the arrangement of the internal expansion pipe and the thread structure, the internal expansion pipe can be screwed into the bevel section. The inner expansion pipe can open the rubber ring, so that the rubber ring is tightly attached to the first pipe body and the second pipe body, a good sealing effect is achieved, the overall structure is simple, cost is low, and production is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of internal expansion type rubber sealing rings, in particular to an internal expansion type rubber sealing ring. Background Art

[0002] The sealing ring, also known as the O-type sealing ring, is a kind of accessory used for sealing. It mainly includes V-shaped sealing ring, U-shaped ring, O-shaped sealing ring, rectangular sealing ring, Y-shaped sealing ring, YX-type sealing ring for hole, YX-type retaining ring for hole, YX-type retaining ring for shaft, YX-type sealing ring for shaft, etc.

[0003] For example, the existing Chinese utility model patent with publication number CN214534443U discloses "An Inner Expanding Rubber Sealing Ring", which increases the squeezing force between the sealing ring and the tube body by setting two sets of squeezing strips. However, the squeezing strips can only increase the pressure of the sealing ring locally, and the squeezing force on the rest of the sealing ring except for the local enhancement is small, which cannot completely fill the gap between the sealing ring and the tube body, resulting in poor sealing effect.

[0004] Chinese utility model patent application number 202322214338.4 proposes an internal expansion type rubber sealing ring. Although it can solve the above-mentioned problems, its structure is relatively complex, the investment cost is high, and it is not conducive to production and application. Based on this, the utility model proposes an internal expansion type rubber sealing ring with a simple structure. Utility Model Content

[0005] In order to overcome the defects in the above-mentioned prior art, the utility model provides an internal expansion type rubber sealing ring. Through the arrangement of the internal expansion tube and the threaded structure, the internal expansion tube can expand the rubber ring, so that the rubber ring is tightly attached to the first tube body and the second tube body, thereby achieving a better sealing effect. The overall structure is simple, the cost is low and it is conducive to production.

[0006] Technical Solution

[0007] An internal expansion type rubber sealing ring comprises a rubber ring arranged in a first tube body and a second tube body, wherein an inner annular surface of the rubber ring is provided with an internal thread, and an internal expansion mechanism for expanding the rubber ring can be threadedly connected in the internal thread.

[0008] Furthermore, the internal expansion mechanism includes an internal expansion tube, and the internal expansion tube includes a large-mouth end, a small-mouth end and an oblique-mouth section.

[0009] Furthermore, an operating rod for rotating the inner expansion tube is fixedly provided in the inner expansion tube.

[0010] Furthermore, an outer annular surface of the inner expansion tube is provided with an external thread.

[0011] Furthermore, the external thread is only provided at the large-mouth end and the small-mouth end.

[0012] Furthermore, both ends of the rubber ring are provided with chamfers for reducing water flow resistance.

[0013] Beneficial Effects

[0014] Compared with the prior art, the utility model has the following beneficial effects: through the arrangement of the inner expansion tube and the threaded structure, the inner expansion tube can expand the rubber ring, so that the rubber ring is tightly attached to the first tube body and the second tube body, achieving a better sealing effect, and the overall structure is simple, low cost, conducive to production, and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of an internal expansion type rubber sealing ring of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the utility model when it is installed.

[0017] Reference Numbers

[0018] Internal expansion mechanism 900 , first tube body 1 , second tube body 2 , chamfer 3 , internal expansion tube 4 , large end 41 , small end 42 , oblique section 43 , operating rod 44 , external thread 45 , rubber ring 5 , internal thread 6 . DETAILED DESCRIPTION

[0019] In order to better illustrate the content of the utility model, the following is a description with reference to the accompanying drawings and implementation examples:

[0020] have Figure 1-Figure 2 As shown, the utility model discloses an internal expansion type rubber sealing ring, including a rubber ring 5 arranged in a first tube body 1 and a second tube body 2, an inner annular surface of the rubber ring 5 is provided with an internal thread 6, and an internal expansion mechanism 900 for expanding the rubber ring 5 can be threadedly connected in the internal thread 6.

[0021] Furthermore, the internal expansion mechanism 900 includes an internal expansion tube 4 , and the internal expansion tube 4 includes a large-mouth end 41 , a small-mouth end 42 and an oblique-mouth section 43 .

[0022] Furthermore, an operating rod 44 for rotating the inner expansion tube 4 is fixedly provided in the inner expansion tube 4 .

[0023] Furthermore, an external thread 45 is provided on the outer annular surface of the inner expansion tube 4 .

[0024] Furthermore, the external thread 45 is only provided at the large opening end 41 and the small opening end 42 .

[0025] Furthermore, chamfers 3 are provided at both ends of the rubber ring 5 for reducing water resistance.

[0026] Specifically, during installation, first place the inner expansion tube 4 into the first tube body 1, and then place the rubber ring 5 at the outlet end of the first tube body 1, with the rubber ring 5 inside the first tube body 1 and outside the first tube body 1 each occupying half;

[0027] Then align the external thread 45 at the small end 42 with the internal thread 6 of the rubber ring 5, grasp the operating rod 44 and rotate the operating rod 44, thereby driving the inner expansion tube 4 to rotate, while keeping the rubber ring 5 stable;

[0028] When the inner expansion tube 4 rotates, it will slowly move rightward under the action of the outer thread 45 and the inner thread 6 and open the rubber ring 5 under the action of the oblique section 43, and then the outer thread 45 at the large end 41 opens the rubber ring 5 and the inner thread 6 and squeezes and bites with the inner thread 6 until the inner expansion tube 4 moves to a suitable position;

[0029] Then the second tube body 2 is inserted into the other side of the rubber ring 5. At this time, the presence of the oblique section 43 helps the second tube body 2 to be squeezed into the rubber ring 5 until the installation is completed. Figure 2 shown.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the technical solution of the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solution recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solution from the spirit and scope of the technical solution of each embodiment of the utility model.

Claims

1. An internal expansion type rubber sealing ring, characterized in that: It comprises a rubber ring (5) arranged in a first tube body (1) and a second tube body (2), wherein an inner annular surface of the rubber ring (5) is provided with an internal thread (6), and an internal expansion mechanism (900) for expanding the rubber ring (5) can be threadedly connected in the internal thread (6).

2. The inner expansion type rubber sealing ring according to claim 1, characterized in that: The internal expansion mechanism (900) comprises an internal expansion tube (4), and the internal expansion tube (4) comprises a large-mouth end (41), a small-mouth end (42), and an oblique-mouth section (43).

3. The inner expansion type rubber sealing ring according to claim 2, characterized in that: An operating rod (44) for rotating the inner expansion tube (4) is fixedly provided inside the inner expansion tube (4).

4. The inner expansion type rubber sealing ring according to claim 3, characterized in that: An external thread (45) is provided on the outer annular surface of the inner expansion tube (4).

5. The inner expansion type rubber sealing ring according to claim 4, characterized in that: The external thread (45) is only provided at the large opening end (41) and the small opening end (42).

6. The inner expansion type rubber sealing ring according to claim 5, characterized in that: Both ends of the rubber ring (5) are provided with chamfers (3) for reducing water flow resistance.

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