CN219367041U - Pipe joint for low-strength pipe fitting - Google Patents

Abstract

The utility model discloses a pipe joint used for low-strength pipe fittings, which relates to the technical field of pipe joints. The utility model includes a joint body, a reinforcing sleeve and a compression nut; one end of the reinforcing sleeve protrudes outward along the radial direction to form a positioning boss, and the other end extends into the inside of the pipeline to be connected, and the outer diameter of the reinforcing sleeve is the same as The inner diameters of the pipelines are equal; there is a stepped hole inside the joint body, so that the inner diameter of the lower part of the joint body is equal to the outer diameter of the pipeline, and the inner diameter of the upper part of the joint body is smaller than the outer diameter of the pipeline; the lower part of the joint body is set from one end of the pipeline to the outer diameter of the pipeline. Externally, the compression nut is installed on the outside of the fitting body through a threaded connection from the other end of the pipeline. The utility model proposes a pipe joint for low-strength pipe fittings, which can be installed on the low-strength pipe fittings to be connected through threaded connection.

Description

A pipe joint for low-strength pipe fittings

technical field

The utility model relates to the technical field of pipe joints, in particular to a pipe joint used for low-strength pipe fittings.

Background technique

The pipe joint is a connection tool between pipe fittings and a detachable connection point between components and pipe fittings. It plays an indispensable and important role in pipe fittings, and it is one of the two main components of hydraulic pipelines.

Existing threaded pipe joints are generally suitable for pipe fittings with a certain strength, while low-strength pipe fittings (such as pipe fittings with thin wall thickness and low strength of the material itself) generally use non-threaded connection forms (such as hot-melt, crimping, welding, etc.), the non-threaded connection has certain restrictions on construction conditions, and this type of connection loses the advantages of fast and simple threaded connection. At the same time, this type of joint generally adopts a single-sealed form, which may cause leakage.

Utility model content

In order to solve the problem that the existing pipe joints used to connect low-strength pipes cannot be quickly installed by adopting non-threaded connections, the utility model provides a pipe joint used for low-strength pipes, which can be installed through threaded connections where it needs to be connected On the low-strength pipe fittings, it not only has the advantages of fast and simple threaded connection, but also can meet the requirements of low-strength pipe connection.

The utility model provides the following technical solutions:

A pipe joint for low-strength pipe fittings, including a joint body, a reinforcing sleeve, and a compression nut; one end of the reinforcing sleeve protrudes partially outward in the radial direction to form a positioning boss, and the other end extends into the pipeline to be connected Inside, and the outer diameter of the reinforcing sleeve is equal to the inner diameter of the pipeline; the inside of the joint body is provided with a stepped hole, so that the inner diameter of the lower part of the joint body is equal to the outer diameter of the pipeline, and the inner diameter of the upper part of the joint body is smaller than the outer diameter of the pipeline; The lower part of the body is sleeved on the outside of the pipeline from one end of the pipeline, and the compression nut is installed on the outside of the joint body through threaded connection from the other end of the pipeline.

Preferably, the pipeline is sleeved with an O-ring for strengthening the seal between the pipeline and the joint body; the inner side of the joint body is provided with a sealing groove for accommodating the O-ring, and the joint body is set on the pipeline. , Compress the O-ring between the inner wall of the sealing groove and the outer wall of the joint body; a seal between the pipeline and the joint body is formed by setting the O-ring.

Preferably, the pipeline is sleeved with a snap ring for strengthening the seal between the pipeline and the joint body; the front and rear ends of the snap ring are provided with inclined guide surfaces, and the inner side of the joint body is provided with a ring that matches the shape of the snap ring. The card slot; by setting the snap ring, a second seal is formed between the pipeline and the joint body, which further improves the sealing effect of the joint body on the pipeline.

The beneficial effects of the utility model:

(1) The utility model can improve the strength of low-strength pipe fittings by installing a reinforcing sleeve in the pipeline, and play a reinforcing role; then install the joint body outside the pipeline, and install the compression nut through threaded connection On the joint body, the joint body is fixed on the outside of the pipeline. Compared with the traditional non-thread connection method used for connecting low-strength pipe fittings, the pipe joint of the utility model is more convenient and fast to install, and can realize quick assembly Purpose.

(2) In order to further improve the sealing effect between the pipeline and the pipe joint, the utility model is provided with an O-shaped sealing ring and a snap ring between the pipeline and the joint body, thereby forming a double seal for the pipeline and ensuring that When one seal fails, the other seal can still function, which improves the reliability of the seal and reduces the possibility of liquid leakage.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a sectional view of the utility model;

Fig. 3 is a partial enlarged view of place a in Fig. 2;

Fig. 4 is a structural exploded view of the utility model.

In the figure: 1. Joint body; 101. Sealing groove; 102. Step hole; 2. Snap ring; 3. Pipeline; 4. Strengthening sleeve; 401. Positioning boss; 5. Compression nut; 6. O-type sealing ring.

Detailed ways

As shown in FIG. 1 and FIG. 4 , a pipe joint for low-strength pipe fittings includes a joint body 1 , a reinforcing sleeve 4 and a compression nut 5 .

As shown in Figure 2 and Figure 3, the reinforcing sleeve 4 is made of metal material, preferably stainless steel, one end of the reinforcing sleeve 4 protrudes outward along the radial direction to form a positioning boss 401, and the other end extends into the pipe to be connected. 3, and make the end surface of the pipeline 3 contact with the positioning boss 401, the outer diameter of the positioning boss 401 is equal to the outer diameter of the pipeline 3, so that the outer surface of the positioning boss 401 and the outer surface of the pipeline 3 are on the same circumferential surface, so that Subsequent sleeve joint body 1; the outer diameter of the reinforcing sleeve 4 is equal to the inner diameter of the pipeline 3, so that the outer wall of the reinforcing sleeve 4 can fully contact the inner wall of the pipeline 3, thereby improving the strength of the low-strength pipe.

The outer surface of the upper part of the joint body 1 is provided with external threads for connecting with other components, and the outer surface of the lower part of the joint body 1 is provided with external threads for connecting with the compression nut 5; the inside of the joint body 1 is provided with a stepped hole 102, and the joint body 1. The inner diameter of the lower part is equal to the outer diameter of the pipeline 3, and the inner diameter of the upper part of the joint body 1 is equal to the inner diameter of the pipeline 3. By setting the stepped hole 102, a limit step is formed inside the joint body 1 while ensuring the circulation of the liquid in the pipeline 3; The lower part of the joint body 1 is set on the outside of the pipeline 3 from one end of the pipeline 3, and the positioning boss 401 is in contact with the limit step, and then the reinforcing compression nut 5 is installed on the joint from the other end of the pipeline 3 through threaded connection. Outside the main body 1; the joint main body 1 is fixed by threaded connection. Compared with the traditional non-threaded connection method for connecting low-strength pipe fittings, the installation of the pipe joint in this embodiment is simpler and more convenient, and can realize quick assembly Purpose.

The pipeline 3 is covered with an O-ring 6 and a snap ring 2 for strengthening the seal between the pipeline 3 and the joint body 1; the O-ring 6 is made of rubber, silica gel and other materials, and the snap ring 2 is made of stainless steel or yellow Made of copper material; the inner side of the joint body 1 is provided with a sealing groove 101 for accommodating the O-ring 6, the cross section of the sealing groove 101 is rectangular, after the joint body 1 is set on the pipeline 3, the O-ring 6 is pressed Closely between the inner wall of the sealing groove 101 and the outer wall of the joint body 1; the front and rear ends of the snap ring 2 are provided with inclined guide surfaces, and the two guide surfaces are connected; the inner side of the joint body 1 is provided with a snap ring that matches the shape of the snap ring Groove; by setting the O-ring 6 and the snap ring 2, a double seal between the pipeline 3 and the joint body 1 is formed. In the case of one seal failure, the other seal can still play a role, improving the pipe joint. The reliability of the seal can reduce the possibility of liquid leakage at the connection between the pipeline 3 and the pipe joint.

The working principle of the utility model: Insert the end of the reinforcing sleeve 4 away from the positioning boss 401 into the pipeline 3 that needs to be sealed and connected, and make the end of the pipeline 3 contact with the positioning boss; then sequentially insert the snap ring 2 and O The type sealing ring 6 is set outside the pipeline 3; then the joint body 1 is sleeved on the outside of the pipeline 3 from one end of the pipeline 3 until the end surface of the positioning boss 401 contacts the limit step, so that the snap ring 2 snaps into the joint In the card groove of the body 1, and press the O-ring 6 between the inner wall of the sealing groove 101 and the outer wall of the pipeline 3, so that a double sealing effect is formed between the pipeline 3 and the joint body 1; finally, the compression nut 5 The other end of the pipeline 3 is fitted on the outside of the joint body 1 through threaded connection, so that the joint body 1 is fixed on the pipeline 3, and the quick assembly between the pipe joint and the low-strength pipe fitting is realized through the threaded connection.

The above description is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it can still understand the aforementioned The technical solutions described in each embodiment are modified, or some of the technical features are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (3)

1. A pipe joint for low-strength pipe fittings, characterized in that: It includes a joint body (1), a reinforcing sleeve (4) and a compression nut (5); one end of the reinforcing sleeve (4) is radially Partially protrudes outward to form a positioning boss (401), and the other end extends into the inside of the pipeline (3) to be connected, and the outer diameter of the reinforcing sleeve (4) is equal to the inner diameter of the pipeline (3); the joint body (1) There is a stepped hole (102) inside, so that the inner diameter of the lower part of the joint body (1) is equal to the outer diameter of the pipeline (3), and the inner diameter of the upper part of the joint body (1) is smaller than the outer diameter of the pipeline (3); the joint body ( 1) The lower part is fitted on the outside of the pipeline (3) from one end of the pipeline (3), and the compression nut (5) is installed on the outside of the joint body (1) through threaded connection from the other end of the pipeline (3). 2. The pipe joint for low-strength pipe fittings according to claim 1, characterized in that: the pipeline (3) is sleeved with a seal for strengthening the seal between the pipeline (3) and the joint body (1). O-ring seal (6); the inner side of the joint body (1) is provided with a seal groove (101) for accommodating the O-ring seal (6). After the joint body (1) is set on the pipeline (3), the The O-ring (6) is compressed between the inner wall of the sealing groove (101) and the outer wall of the joint body (1). 3. The pipe joint for low-strength pipe fittings according to claim 2, characterized in that: the pipeline (3) is sleeved with a seal for strengthening the seal between the pipeline (3) and the joint body (1). The snap ring (2); the front and rear ends of the snap ring (2) are provided with inclined guide surfaces, and the inner side of the joint body (1) is provided with a slot matching the shape of the snap ring (2).