CN221683918U - A gas-tight threaded joint - Google Patents

Abstract

The utility model discloses an airtight threaded joint which comprises a joint, an a sealing cavity, a b sealing cavity, a sealing assembly and an air supply channel, wherein the a sealing cavity is formed in one end of the joint, the b sealing cavity is formed in one end of the joint, which is far away from the a sealing cavity, and the sealing assemblies are respectively inserted into the a sealing cavity and the b sealing cavity; the sealing assembly comprises a pressing sleeve, an annular sealing gasket groove, an annular sealing gasket, a sealing ring groove and a sealing ring. The screw joint mechanism with high connection tightness is provided for the medium conveying pipeline, the air supply in the air supply channel is realized through the airtight interface a and the airtight interface b, so that the air pressure in the air supply channel is increased to push the sealing component, the sealing component is pressed to realize further push blocking of the pipeline in butt joint with the screw joint, the joint can be kept sealed for a long time under the push pressure of the air pressure, and the tightness between two groups of pipelines connected through the screw joint is better.

Description

A gas-tight threaded joint

Technical Field

The utility model relates to the technical field of threaded joints, in particular to an airtight threaded joint.

Background Art

Threaded joints are widely used in the connection of various pipelines and equipment, such as chemical plants, steel plants, power plants, etc. These pipelines and equipment require threaded joints to achieve connection, such as pipelines, valves, oil pumps, reactors, etc.

Existing threaded joints usually rely on the friction between materials. Since the threaded connection itself is a friction connection method, long-term exposure to external forces will cause wear and loosening of the contact surface, which in turn causes loosening failures in the threaded connection. There is a lack of a mechanism that can increase air pressure to maintain sealing.

The existing threaded joints have the following disadvantages: the sealing of the existing threaded joints for connecting the medium transmission pipelines completely relies on the friction connection of the threaded thread and the sealing gasket. Under the vibration or load in long-term use, the contact surface of the threaded thread will wear and loosen, resulting in reduced sealing. To this end, we propose an airtight threaded joint.

Utility Model Content

The main purpose of the utility model is to provide a gas-tight threaded joint, which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical solution adopted by the utility model is:

An airtight threaded joint, comprising a joint, a sealing cavity a and a sealing cavity b, and also comprising a sealing assembly and an air supply passage, wherein the sealing cavity a is provided at one end of the joint, and the sealing cavity b is provided at one end of the joint away from the sealing cavity a, and the sealing assemblies are respectively inserted into the sealing cavities a and b;

The sealing assembly comprises a compression sleeve, an annular sealing gasket groove, an annular sealing gasket, a sealing ring groove and a sealing ring.

Furthermore, the compression sleeves are provided in two groups, and a sealing ring groove is opened on the periphery of one end of the two groups of compression sleeves. The sealing ring is arranged on the sealing ring groove, and one end of the two groups of compression sleeves is respectively inserted into the corresponding sealing cavity a and sealing cavity b.

Furthermore, an annular sealing gasket groove is formed on the end surface of the other end of the two groups of compression sleeves, one side of the annular sealing gasket is embedded in the annular sealing gasket groove, and the thickness of the annular sealing gasket is greater than the depth of the annular sealing gasket groove.

Furthermore, an airtight interface a and an airtight interface b are respectively arranged on both sides of the top of the joint, and air supply passages are provided between the airtight interface a and the sealed cavity a, and between the airtight interface b and the sealed cavity b.

Furthermore, threaded interfaces are respectively provided at both ends of the joint.

Compared with the prior art, the utility model has the following beneficial effects: through the components consisting of the joint, a sealing chamber, b sealing chamber, sealing assembly and air supply duct, a set of threaded joint mechanisms with high connection sealing performance is provided for the medium conveying pipeline, and the threaded connection with the external pipeline is realized through the threaded interfaces at both ends of the joint, and the air supply to the air supply duct is supplied through the airtight interface a and the airtight interface b, so that the air pressure inside the air supply duct is increased to push the sealing assembly, and the sealing assembly is pressurized to achieve further top pressure and sealing of the pipeline connected with the joint thread, and under the pushing and pressurization of the air pressure, the joint can remain sealed for a long time, so that the sealing performance of the two groups of pipelines connected by the joint thread is better, and the problem that the sealing of the existing threaded joints connected to the medium conveying pipeline is completely dependent on the friction connection of the threaded thread and the sealing gasket, and the contact surface of the threaded thread will wear and loosen under the vibration or load in long-term use, resulting in reduced sealing performance.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of an airtight threaded joint of the utility model.

FIG. 2 is a schematic cross-sectional view of an airtight threaded joint of the utility model.

FIG3 is a schematic cross-sectional view of a gas-tight threaded joint of the utility model.

FIG. 4 is a schematic diagram of a sealing assembly of an airtight threaded joint according to the present invention.

FIG. 5 is a schematic diagram of a sealing assembly of an airtight threaded joint according to the present invention.

In the figure: 1. joint; 2. sealing chamber a; 3. sealing chamber b; 4. sealing assembly; 401. sealing assembly; 402. annular sealing gasket groove; 403. annular sealing gasket; 404. sealing ring groove; 405. sealing ring; 5. airtight interface a; 6. airtight interface b; 7. air supply duct; 8. threaded interface.

DETAILED DESCRIPTION

In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

As shown in Figures 1-5, an airtight threaded joint includes a joint 1, a sealing cavity a 2 and a sealing cavity b 3, and also includes a sealing component 4 and an air supply duct 7. A sealing cavity a 2 is opened at one end of the joint 1, and a sealing cavity b 3 is opened at the end of the joint 1 away from the sealing cavity a 2. Sealing components 4 are respectively inserted into the sealing cavities a 2 and b 3; the sealing component 4 includes a compression sleeve 401, an annular sealing gasket groove 402, an annular sealing gasket 403, a sealing ring groove 404 and a sealing ring 405.

Among them, there are two groups of compression sleeves 401, and one end of the two groups of compression sleeves 401 is opened on the periphery of a sealing ring groove 404, and the sealing ring 405 is sleeved on the sealing ring groove 404. One end of the two groups of compression sleeves 401 is respectively inserted into the corresponding a sealing cavity 2 and b sealing cavity 3.

The end faces of the other ends of the two groups of compression sleeves 401 are provided with an annular sealing groove 402 , one side of the annular sealing gasket 403 is embedded in the annular sealing groove 402 , and the thickness of the annular sealing gasket 403 is greater than the depth of the annular sealing groove 402 .

Among them, the two sides of the top of the joint 1 are respectively provided with an a airtight interface 5 and a b airtight interface 6, and air supply ducts 7 are opened between the a airtight interface 5 and the a sealing cavity 2, and between the b airtight interface 6 and the b sealing cavity 3.

Wherein, threaded interfaces 8 are respectively provided at both ends of the joint 1.

It should be noted that the utility model is an air-tight threaded joint. When working, the personnel respectively threadably connect the two groups of pipes to be connected to the threaded interfaces 8 at both ends of the joint 1, and equip the joint 1 with a group of air supply pump groups. The exhaust end of the air supply pump is connected to the a air-tight interface 5 and the b air-tight interface 6 through a tee, so that the air pressure enters the corresponding air supply duct 7 from the a air-tight interface 5 and the b air-tight interface 6 respectively. As the air pressure in the air supply duct 7 increases, the air pressure will push the rear end of the pressure sleeve 401, so that the end of the annular sealing gasket 403 of the pressure sleeve 401 will be in contact and pressed with the pipe joint connected to the threaded interface 8, so that the medium conveying pipelines can rely on the air-tight threaded joint of the present application to complete a highly sealed connection.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.

In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the present utility model, unless otherwise clearly specified and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection;

The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. An airtight threaded joint, comprising a joint (1), a sealing cavity a (2) and a sealing cavity b (3), characterized in that it also comprises a sealing component (4) and an air supply passage (7), wherein the joint (1) has a sealing cavity a (2) at one end, and a sealing cavity b (3) at one end of the joint (1) away from the sealing cavity a (2), and the sealing components (4) are respectively inserted into the sealing cavity a (2) and the sealing cavity b (3); The sealing assembly (4) comprises a compression sleeve (401), an annular sealing gasket groove (402), an annular sealing gasket (403), a sealing ring groove (404) and a sealing ring (405). 2. An airtight threaded joint according to claim 1, characterized in that: the compression sleeve (401) is provided with two groups, and a sealing ring groove (404) is opened on the periphery of one end of the two groups of compression sleeves (401), and the sealing ring (405) is sleeved on the sealing ring groove (404), and one end of the two groups of compression sleeves (401) is respectively inserted into the corresponding a sealing cavity (2) and b sealing cavity (3). 3. An airtight threaded joint according to claim 1, characterized in that: an annular sealing gasket groove (402) is provided on the end surface of the other end of the two groups of compression sleeves (401), one side of the annular sealing gasket (403) is embedded in the annular sealing gasket groove (402), and the thickness of the annular sealing gasket (403) is greater than the depth of the annular sealing gasket groove (402). 4. An airtight threaded joint according to claim 1, characterized in that: an a airtight interface (5) and a b airtight interface (6) are respectively provided on both sides of the top of the joint (1), and air supply ducts (7) are provided between the a airtight interface (5) and the a sealing cavity (2) and between the b airtight interface (6) and the b sealing cavity (3). 5. The airtight threaded joint according to claim 1, characterized in that threaded interfaces (8) are respectively provided at both ends of the joint (1).