Rotary joint

Abstract

The utility model belongs to the technical field of pipeline fittings, in particular to a rotary joint, which comprises a fixed pipe joint and a rotary pipe joint, an inner hole of the fixed pipe joint is a stepped hole and comprises a small-diameter part and a large-diameter part, and a positioning step is formed between the small-diameter part and the large-diameter part. The outer end of the rotating pipe connector outwards penetrates through the small-diameter part to the outside of the fixed pipe connector, the inner end, located in the large-diameter part, of the rotating pipe connector outwards extends in the radial direction to form an annular protrusion, the outer diameter of the annular protrusion is larger than the inner diameter of the small-diameter part, and an inner sealing ring in dynamic sealing fit is arranged between the rotating pipe connector and the large-diameter part. And an outer sealing ring in dynamic sealing fit is arranged between the rotating pipe joint and the small-diameter part. The rotary pipe joint is simple in structure, small in number of parts and low in cost, the rotary pipe joint and the fixed pipe joint can rotate relatively by means of dynamic sealing fit of the inner sealing ring and the outer sealing ring, the number of the whole parts is small, and the requirement of the market for economical shower products can be met.

Description

Technical fields:

[0001] This utility model belongs to the field of pipe fittings technology, and specifically refers to a rotary joint. Background technology:

[0002] In the bathroom fixtures industry, most shower hose connectors use a fixed connection structure, which has low rotational freedom and often becomes tangled during shower head use, resulting in poor flexibility. While some self-rotating shower hose connectors exist on the market, these connectors have complex and delicate structures, making assembly difficult and manufacturing costs high. Their sealing structures will inevitably wear and leak over time, leading to high replacement costs, making it difficult to meet the mass market's demand for economical shower products. Summary of the Invention:

[0003] The purpose of this invention is to provide a rotary joint with a simple structure, few parts, and low cost. It effectively achieves relative rotation by means of the dynamic sealing cooperation of inner and outer sealing rings, thus meeting the market demand for economical shower products.

[0004] This utility model is implemented as follows:

[0005] A rotary joint includes a fixed pipe joint and a rotating pipe joint. The inner hole of the fixed pipe joint is a stepped hole, and it includes a small diameter portion and a large diameter portion. A positioning step is formed between the small diameter portion and the large diameter portion. The outer end of the rotating pipe joint extends outward through the small diameter portion to the outside of the fixed pipe joint. The inner end of the rotating pipe joint located in the large diameter portion extends radially outward to form an annular protrusion. The outer diameter of the annular protrusion is larger than the inner diameter of the small diameter portion. An inner sealing ring for dynamic sealing is provided between the rotating pipe joint and the large diameter portion, and an outer sealing ring for dynamic sealing is provided between the rotating pipe joint and the small diameter portion.

[0006] In one of the rotary joints described above, the inner sealing ring is disposed between the positioning step and the annular protrusion.

[0007] In one of the rotary joints described above, the outer wall surface of the rotary joint is provided with an inner annular groove for fitting an inner sealing ring and an outer annular groove for fitting an outer sealing ring.

[0008] In the aforementioned rotary joint, the outer diameter of the outer end of the rotary joint is smaller than the inner diameter of the small diameter portion, the outer diameter of the annular protrusion is smaller than the inner diameter of the large diameter portion, and the rotary joint is supported in the inner hole of the fixed joint by the inner sealing ring and the outer sealing ring.

[0009] The outstanding advantages of this utility model compared to the prior art are:

[0010] This utility model has a simple structure, few parts, and low cost. With the dynamic sealing cooperation of the inner and outer sealing rings, the rotating pipe joint can achieve relative rotation with the fixed pipe joint. The overall number of parts is small, which can meet the market demand for economical shower products. Attached image description:

[0011] Figure 1 This is an overall structural diagram of the present invention;

[0012] Figure 2 This is an exploded view of the overall structure of this utility model;

[0013] Figure 3 This is an overall sectional view of the present invention.

[0014] In the diagram: 1. Fixed pipe joint; 2. Rotary pipe joint; 3. Small diameter section; 4. Large diameter section; 5. Annular protrusion; 6. Inner sealing ring; 7. Outer sealing ring. Detailed implementation method:

[0015] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —3:

[0016] A rotary joint includes a fixed pipe joint 1 and a rotating pipe joint 2. The inner hole of the fixed pipe joint 1 is a stepped hole and includes a small diameter portion 3 and a large diameter portion 4. A positioning step is formed between the small diameter portion 3 and the large diameter portion 4. The outer end of the rotating pipe joint 2 extends outward through the small diameter portion 3 to the outside of the fixed pipe joint 1. The inner end of the rotating pipe joint 2 located in the large diameter portion 4 extends radially outward to form an annular protrusion 5. The outer diameter of the annular protrusion 5 is larger than the inner diameter of the small diameter portion 3. An inner sealing ring 6 for dynamic sealing is provided between the rotating pipe joint 2 and the large diameter portion 4, and an outer sealing ring 7 for dynamic sealing is provided between the rotating pipe joint 2 and the small diameter portion 3.

[0017] This utility model has a simple structure, few parts, and low cost. With the dynamic sealing cooperation of the inner and outer sealing rings 7, the rotating pipe joint 2 can achieve relative rotation with the fixed pipe joint 1. The overall number of parts is small, which can meet the market demand for economical shower products.

[0018] In order to avoid the annular protrusion 5 from directly contacting the positioning step and thus hindering the relative rotation between the rotating pipe joint 2 and the fixed pipe joint 1, the inner sealing ring 6 is set between the positioning step and the annular protrusion 5.

[0019] Furthermore, the inner sealing ring 6 and the outer sealing ring 7 can be fitted onto the inner hole of the fixed pipe joint 1, that is, an annular groove is opened on the inner hole of the fixed pipe joint 1 for the inner sealing ring 6 and the outer sealing ring 7 to be fitted and fixed. In this embodiment, the outer wall surface of the rotating pipe joint 2 is provided with an inner annular groove for the inner sealing ring 6 to be fitted and an outer annular groove for the outer sealing ring 7 to be fitted.

[0020] Furthermore, in this embodiment, the rotating pipe joint 2 is supported in the inner hole of the fixed pipe joint 1 by the inner sealing ring 6 and the outer sealing ring 7. This reduces the contact wear between the rotating pipe joint 2 and the fixed pipe joint 1. That is, the outer diameter of the outer end of the rotating pipe joint 2 is smaller than the inner diameter of the small diameter portion 3, and the outer diameter of the annular protrusion 5 is smaller than the inner diameter of the large diameter portion 4. The rotating pipe joint 2 is supported in the inner hole of the fixed pipe joint 1 by the inner sealing ring 6 and the outer sealing ring 7.

[0021] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made to the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A rotary joint, characterized by: It includes a fixed pipe joint (1) and a rotating pipe joint (2). The inner hole of the fixed pipe joint (1) is a stepped hole and includes a small diameter part (3) and a large diameter part (4). A positioning step is formed between the small diameter part (3) and the large diameter part (4). The outer end of the rotating pipe joint (2) extends outward through the small diameter part (3) to the outside of the fixed pipe joint (1). The inner end of the rotating pipe joint (2) located in the large diameter part (4) extends radially outward to form an annular protrusion (5). The outer diameter of the annular protrusion (5) is larger than the inner diameter of the small diameter part (3). An inner sealing ring (6) with dynamic sealing is provided between the rotating pipe joint (2) and the large diameter part (4). An outer sealing ring (7) with dynamic sealing is provided between the rotating pipe joint (2) and the small diameter part (3).

2. A rotary joint according to claim 1, characterized in that: The inner sealing ring (6) is positioned between the positioning step and the annular protrusion (5).

3. A rotary joint as claimed in claim 1, characterized in that: The outer wall surface of the rotating pipe joint (2) is provided with an inner annular groove for the inner sealing ring (6) to be fitted and an outer annular groove for the outer sealing ring (7) to be fitted.

4. A rotary joint as claimed in claim 1, characterized in that: The outer diameter of the outer end of the rotating pipe joint (2) is smaller than the inner diameter of the small diameter part (3), and the outer diameter of the annular protrusion (5) is smaller than the inner diameter of the large diameter part (4). The rotating pipe joint (2) is supported in the inner hole of the fixed pipe joint (1) by the inner sealing ring (6) and the outer sealing ring (7).

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