CN205192695U - Coil pipe gas tightness detection device - Google Patents

Abstract

The coil air tightness detection device belongs to the field of detection devices, including a hoop sleeve, an inner bushing and an end cover. The hoop sleeve is composed of two axially divided sleeves, and the sleeves are radially combined and connected by screws. The hoop sleeve is set on the outer diameter of the coil, and the end cover is fixedly connected to one end of the hoop sleeve by screws. The end cover is provided with a central through hole. The inner bushing includes an annular sleeve body, and one end of the annular sleeve body is provided with a central axial The annular sleeve body is embedded in the coil, and the annular sleeve body is against the inner end surface of the end cover. At least one annular groove is arranged on the outer surface of the annular sleeve body, and a sealing ring is embedded in the annular groove The outer wall of the annular sleeve and the inner wall of the coil are sealed, and the axial protrusion protrudes from the central through hole of the end cover. The axial protrusion is provided with an axial inflation through hole to communicate with the inner cavity of the annular sleeve. The position is limited by the end cover, and an inflatable valve is inserted in the orifice at the front end of the inflatable through hole. Solve the defect that the high-pressure gas source is easily damaged when it is connected to the metal coil.

Description

Coil air tightness testing device

technical field

The utility model belongs to the field of detection devices, in particular to a coil air tightness detection device.

Background technique

After the coil processing is completed, the air tightness test is required to detect whether the coil is leaking, the exhaust is not smooth, etc. During the air tightness test, the coil port and the high-pressure interface need to be well sealed, and the coil needs to withstand the flow of high-pressure media. , to test the air tightness of the coil, when inflating, it is necessary to connect a high-pressure gas source to the inner cavity of the metal coil, because the wall thickness of the metal coil is thin, it is easy to be damaged when connected, resulting in instability when testing the air tightness .

Utility model content

The purpose of this utility model is to solve the defect that the high-pressure gas source is easily damaged when connected to the metal coil, and to provide a coil air-tightness detection device that is easy to install and has a simple structure between the connection coil and the high-pressure gas source.

For this reason, the utility model adopts the following technical solutions: a coil air tightness detection device, which is characterized in that the detection device includes a hoop sleeve, an inner bushing and an end cover, and the hoop sleeve is divided by two axially divided The sleeve body is radially combined and connected by screws. The hoop sleeve is set on the outer diameter of the coil so that the inner diameter of the hoop sleeve is closely matched with the outer diameter of the coil. The end cover is fixedly connected to the hoop by screws. One end of the sleeve, a central through hole is set on the end cover, the inner bushing includes an annular sleeve body, a central axial protrusion is arranged on one end surface of the annular sleeve body, the annular sleeve body is embedded in the coil, and the annular sleeve body The sleeve body leans against the inner end surface of the end cap, and at least one annular groove is arranged on the outer surface of the annular sleeve body, and a sealing ring is embedded in the annular groove to make the gap between the outer wall of the annular sleeve and the inner wall of the coil tube For sealing, the axial protrusion protrudes from the central through hole of the end cap, the axial protrusion is provided with an axial inflation through hole communicating with the inner cavity of the annular sleeve, and the inner bushing is limited by the end cap. An inflatable valve is inserted into the orifice at the front end of the inflatable through hole.

As a supplement and improvement to the above technical solution, the utility model also includes the following technical features.

The inner diameter of the inflation through hole of the inner bush is axially enlarged step by step from the front end of the inner bush to the inner diameter of the annular sleeve body side of the inner bush, which can buffer the airflow and reduce the impact force of the airflow.

An air release valve hole is arranged on the circumferential surface of the hoop sleeve, and the air release valve hole is used for placing the air release valve on the coil pipe.

The utility model can achieve the following beneficial effects: the device connects the metal coil pipe with the joint of the high-pressure air source, the hoop sleeve radially fits and fits tightly on the outer diameter of the coil pipe, and the high-pressure air source is inflated Good air tightness, convenient disassembly and assembly, and simple structure.

Description of drawings

Fig. 1 is the front view of the utility model.

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

Fig. 3 is the A-A step sectional view of the utility model.

detailed description

Specific embodiments of the present utility model are described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 3, the utility model includes a hoop sleeve 1, an inner bushing and an end cover 5. The hoop sleeve 1 is composed of two axially divided sleeves, and the sleeves are radially combined through screws 7. connection, the hoop cover 1 is set on the outer diameter of the coil 8 so that the inner diameter of the hoop 1 is closely matched with the outer diameter of the coil 8, and the end cover 5 is fixedly connected to one end of the hoop 1 through the screw 2, and the end A central through hole is set on the cover 5, and the inner bushing includes an annular sleeve body. A central axial protrusion 4 is arranged on one end surface of the annular sleeve body. The annular sleeve body is embedded in the coil pipe 8. The annular sleeve body Against the inner end surface of the end cover 5, at least one annular groove is provided on the outer surface of the annular sleeve, and a sealing ring 9 is embedded in the annular groove to make the outer wall of the annular sleeve and the inner wall of the coil 8 The space between them acts as a seal. The axial protrusion 4 protrudes from the central through hole of the end cap 5. The axial protrusion 4 is provided with an axial inflation through hole 10 communicating with the inner cavity of the annular sleeve. The inner lining The inner diameter of the inflation through hole 10 of the sleeve expands axially in stages from the front end of the inner bush to the inner diameter of the annular sleeve body of the inner bush, which can buffer the air flow and reduce the impact force of the air flow. The inner bush is limited by the end cover 5. An inflation valve 3 is inserted at the front end of the inflation through hole 10, and the deflation valve hole 11 is arranged on the circumferential surface of the hoop cover 1, and the deflation valve hole 11 is used to place the deflation on the coil pipe 8. valve 6.

Claims (3)

1. The coil air tightness detection device is characterized in that: the detection device includes a hoop sleeve, an inner bushing and an end cover, and the hoop sleeve is composed of two axially divided sleeves, and the sleeves are radially opposed to each other. The combined combination is connected by screws, the hoop sleeve is set on the outer diameter of the coil, the end cover is fixedly connected to one end of the hoop sleeve by screws, a central through hole is set on the end cover, and the inner bushing includes an annular sleeve One end surface of the annular sleeve body is provided with a central axial protrusion, the annular sleeve body is embedded in the coil, the annular sleeve body is against the inner end surface of the end cover, and the outer circular surface of the annular sleeve body There is at least one annular groove on the top, and a sealing ring is embedded in the annular groove to make a seal between the outer wall of the annular sleeve and the inner wall of the coil tube. The axial protrusion extends from the central through hole of the end cover. Out, the axial protrusion is provided with an axial inflation through hole communicating with the inner cavity of the annular sleeve, the inner bush is limited by the end cover, and an inflation valve is inserted at the front end of the inflation through hole. 2. The coil air tightness detection device according to claim 1, characterized in that: the inner diameter of the inflation through hole of the inner bush is axially from the front end of the inner bush to the inner diameter of the annular sleeve side of the inner bush. Grading expanded. 3. The coil air tightness detection device according to claim 1, characterized in that: a vent valve hole is provided on the circumferential surface of the hoop sleeve, and the vent valve hole is used to place the vent on the coil tube. gas valve.