CN205991263U - Pipe joint arrangement - Google Patents

Abstract

The utility model relates to a pipe joint device, which comprises a joint body, the outer surface of the joint body has a guide section and a receiving section arranged axially from the end, and the gap between the guide section and the receiving section is A smooth transition diverging section; the joint body on the side away from the diverging section of the receiving section is provided with an annular protrusion, and the outer diameter of the annular protrusion is larger than the outer diameter of the accepting section; the annular A crimping nut is threadedly connected to the protrusion, and an accommodating cavity is formed between the crimping nut and the corresponding guide segment, expanding segment and receiving segment, and the inner wall of the crimping nut is provided with a The crimping part corresponding to the segment position. The beneficial effects of the utility model: not only can the assembly interference be reduced to make the assembly easier to operate, but also the external compression of the nut can ensure the sealing and connection fastness between the pipe joint and the connecting pipe.

Description

Pipe joint device

technical field

The utility model relates to a pipe joint device.

Background technique

At present, considering that the oil return joint is bamboo joint type, and the oil return pipe adopts the fuel pipeline connection structure of nylon tube, during assembly, it is necessary to manually insert the nylon tube into the oil return joint, and the connection method is an interference fit form, so the assembly Time is more laborious. If the diameter of the bamboo oil return joint is reduced, the nylon tube may come out. Due to the properties of the nylon material, the pipe is relatively hard, especially when the temperature is low. During the assembly process, there are difficulties in fitting, especially when the gloves worn by the operator are oily or the surface of the oil pipe is oily, which will make assembly more difficult.

Utility model content

In order to overcome the above defects, the utility model provides a pipe joint device, which can not only reduce the assembly interference to make the assembly easier to operate, but also use the external compression of the nut to ensure the tightness and tightness of the connection between the pipe joint and the connecting pipe. Solidity.

In order to solve the above technical problems, the technical solution of the utility model is: a pipe joint device, including a joint body, the outer surface of the joint body has a guide section and a receiving section arranged axially from the end, the guide section There is a smooth transition between the leading section and the receiving section, and the gradually expanding section whose outer diameter gradually increases from small to large; the joint body on the side of the receiving section away from the gradually expanding section is provided with an annular protrusion, so The outer diameter of the annular protrusion is greater than the outer diameter of the receiving section; the annular protrusion is threadedly connected with a buckle nut, and the buckle nut is connected to the corresponding guide section, gradually expanding section and receiving section. An accommodating cavity is formed, and a crimping portion corresponding to the position of the expanding section is provided on the inner wall of the crimping nut.

As a further improvement, the crimping portion is an inner chamfer provided on the inner wall of the crimping nut, and the small end of the inner chamfer is a crimping end.

As a further improvement, an annular groove is provided on the joint body between the receiving section and the annular protrusion.

Adopt above technical scheme, the beneficial effect of the utility model:

Since the joint body is provided with a guide section, an expanding section and a receiving section, the nylon tube can be easily introduced into the joint body by using the guiding section, and then the nylon tube is pushed through the expanding section and the receiving section in sequence. The structure reduces the assembly interference between the nylon tube and the pipe joint, thus greatly reducing the difficulty of assembly, and then uses the buckle nut to compress the nylon tube to ensure the tightness, and at the same time, it is tightly connected with the joint body, thus ensuring the nylon tube and the joint body. The tightness of the pipe joint connection, the overall structure is simple, and it is easy to operate.

Description of drawings

Fig. 1 is the structural representation of pipe joint;

Fig. 2 is a schematic structural view of a buckle nut;

Fig. 3 is a structural schematic diagram of the assembly of pipe joints, nylon pipes and crimp nuts;

As shown in the figure: 1-joint body, 10-guiding section, 11-increasing section, 12-receiving section, 13-annular groove, 14-annular protrusion, 2-buckle nut, 20-inner chamfer, 3- Nylon tube.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown together in Figure 1 and Figure 2, a pipe joint device has a guide section 10 and a receiving section 12 arranged axially from the end on the outer surface of the joint body 1, and the guide section 10 and the receiving section 12 is a smooth transition and gradually expanding section 11 whose outer diameter gradually increases from small to large.

The joint body 1 on the side of the receiving section 12 away from the expanding section 11 is provided with an annular protrusion 14 , and the outer diameter of the annular protrusion 14 is larger than that of the receiving section 12 . An annular groove 13 is provided on the joint body 1 between the receiving section 12 and the annular protrusion 14 . The arrangement of the annular groove 13 can reduce the matching amount with the nylon tube 3 and make the assembly more labor-saving.

On the annular protrusion 14, a crimping nut 2 is threadedly connected, and an accommodating cavity is formed between the crimping nut 2 and the corresponding guide section 10, the expanding section 11 and the receiving section 12, and the inner wall of the crimping nut 2 is provided with a progressive The crimping part corresponding to the position of the expansion section 11. As shown in FIG. 2 , preferably, the crimping portion is an inner chamfer 20 provided on the inner wall of the crimping nut 2 , and the small end of the inner chamfer 20 is a crimping end. Of course, the crimping part can also be a structure such as a protrusion arranged on the inner wall of the crimping nut, which can be selected according to actual needs.

The specific working principle is analyzed as follows: the outer diameter of the above-mentioned guide section 10 is smaller than the inner diameter of the nylon tube 3, and the outer diameter of the receiving section 12 is greater than the inner diameter of the nylon tube 3; the inner cavity of the crimping nut 2 is not only matched with the crimping part, but also ensures that it can It only needs to be put on the annular protrusion 14 and the nylon tube 3 on the joint body 1 , refer to the assembly diagram in FIG. 3 .

When operating, put the buckle nut 2 on the nylon tube 3 first, then pick up the nylon tube 3 and align it with the guide section 10 on the joint body 1, so that the nylon tube 3 can be easily placed on the guide section 10, and then continue to push the nylon tube 3. After the expanding section 11 and the receiving section 12, the nylon tube 3 is expanded. Due to the existence of the annular groove 13, it will be easier to continue to push the nylon tube 3 until the nylon tube 3 is pushed against the annular protrusion 14. At this time, push the buckle nut 2 that is sleeved on the nylon tube 3. When pushing the buckle nut 2 and feeling that there is resistance, at this time, when the inner chamfer 20 of the buckle nut 2 is pressed on the nylon tube 3, then the buckle can be tightened. The nut 2 makes the buckle nut 2 and the annular protrusion 14 thread-locked, and at the same time, the tightening process can make the buckle end of the inner chamfer 20 tightly pressed on the nylon tube 3, thereby ensuring the connection between the nylon tube 3 and the joint body 1 reliability and tightness.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (3)

1. A pipe joint device, comprising: a joint body (1), characterized in that the outer surface of the joint body (1) has a guide section (10) and a receiving section (12) arranged axially from the end, The guide segment (10) and the receiving segment (12) are a gradually expanding segment (11) with a smooth transition and an outer diameter gradually increasing from small to large; The joint body (1) on the side of the receiving section (12) away from the expanding section (11) is provided with an annular protrusion (14), and the outer diameter of the annular protrusion (14) is larger than the The outer diameter of the receiving section (12); The annular protrusion (14) is threadedly connected with a buckle nut (2), and the buckle nut (2) is connected with the corresponding guide section (10), gradual expansion section (11) and receiving section (12) An accommodating cavity is formed therebetween, and a crimping portion corresponding to the position of the expanding section (11) is provided on the inner wall of the crimping nut (2). 2. The pipe joint device according to claim 1, characterized in that, the crimping part is an inner chamfer (20) provided on the inner wall of the crimping nut, and the small end of the inner chamfer (20) For the buckle end. 3. The pipe joint device according to claim 1, characterized in that an annular groove ( 13).