Internal expansion type quick connector

Abstract

The utility model discloses an internal expansion type quick connector in the related technical field of quick connectors, which comprises an inner groove body and a convex body, one end of the inner groove body far away from the convex body is connected with a shell, a valve core is arranged in the shell, a spring lower cover and a spring upper cover are arranged between the valve core and the inner wall of the shell, and the inner wall of the shell is connected with the convex body. An outer spring is arranged outside the portion, between the spring upper cover and the spring lower cover, of the valve element, a handle is arranged on the outer side of the spring upper cover, one end of the handle is connected with the end of the valve element through a pin, a buckle is arranged at one end of the pin, and the end, close to the spring upper cover, of the handle is of a flange structure. The quick connector is provided with the lifting handle, the pin, the main pipe, the valve element, the inner spring, the convex body and the outer spring, the main pipe and the valve element are driven to move by rotating the lifting handle, the rubber ring is arranged between the convex body and the inner groove body, and along with the movement of the convex body, the rubber ring is extruded to be tightly attached to an inner hole of a blocked tool, and quick connection is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to quick connectors, and specifically relates to an internally expanding quick connector. Background Art

[0002] A quick connector is a connector that can achieve the connection or disconnection of pipelines without tools. Quick connectors can be divided into: quick connectors for air, quick connectors for oxygen fuel gas, quick connectors for common use of gas and liquid, quick connectors for oil pressure, quick connectors for inert gas, quick connectors for cooling water temperature and oil, and semiconductor quick connectors. Quick connectors can also be used as sealing plugs. Existing quick connectors usually achieve quick connection through plugging and unplugging. Although quick connection can be achieved, in the actual use process, if the quick connector is not plugged in place, ineffective connection or poor connection tightness will occur, and it is impossible to effectively determine whether the quick connector is installed in place. Moreover, in order to improve the connection tightness, the connection position is mostly interference fit, resulting in a large force required during the plugging and unplugging process.

[0003] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0004] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art and provide an internally expanding quick connector. To solve the above technical problem, the basic concept of the technical solution adopted by the present utility model is as follows:

[0005] An internally expanding quick connector includes an inner groove body and a convex body. One end of the inner groove body away from the convex body is connected to a shell. A valve core is arranged inside the shell. A spring lower cover and a spring upper cover are arranged between the valve core and the inner wall of the shell. An outer spring is arranged outside the valve core between the spring upper cover and the spring lower cover. A handle is arranged outside the spring upper cover. One end of the handle is connected to the end of the valve core through a pin. A buckle is arranged at one end of the pin. One end of the handle close to the spring upper cover is of a flange structure. The other end of the valve core is connected to a main pipe. One end of the main pipe away from the valve core is connected to the convex body. A rubber ring is arranged between the outside of the convex body and the inner groove body. An inner spring is arranged inside the inner groove body.

[0006] As a further scheme of the present utility model: the valve core is of a three-stage stepped structure. An installation groove is opened at one end of the handle close to the spring upper cover. The small end of the valve core is matched with the installation groove. A through hole is arranged at the corresponding position where the small end of the valve core is matched with the installation groove. The pin passes through the through hole to realize the rotational connection between the valve core and the handle.

[0007] As a further solution of the present utility model: central holes are correspondingly arranged on both the upper spring cover and the lower spring cover, the valve core passes through the corresponding central hole, the lower spring cover is embedded and installed in the cavity of the housing, and the outer end of the upper spring cover is located outside the housing.

[0008] As a further solution of the present utility model: a threaded hole is provided on the end face of the valve core near the inner groove body, the valve core is threadedly connected with the main pipe, a fitting groove is provided at one end of the handle located in the inner groove body, and the end specifications of the main pipe are adapted to the specifications of the fitting groove, so as to realize the horizontal movement of the main pipe driving the convex body towards the end close to the handle.

[0009] As a further solution of the present utility model: a sealing groove is provided on the combined plane of the main pipe and the fitting groove of the convex body, and an O-ring is installed in the sealing groove to improve the sealing performance of the cooperation between the main pipe and the convex body.

[0010] After adopting the above technical solutions, the present utility model has the following beneficial effects compared with the prior art.

[0011] The quick connector of the present utility model is provided with a handle, a pin, a main pipe, a valve core, an inner spring, a convex body and an outer spring. By rotating the handle, the main pipe and the valve core are driven to move positions. A rubber ring is provided between the convex body and the inner groove body. As the convex body moves, the rubber ring is squeezed and closely fits with the inner hole of the blocked tooling, realizing quick connection.

[0012] The connection state of the quick connector of the present utility model can be judged by observing the position of the handle. When the handle and the housing are in the same straight line, it is in the natural state. When the handle and the housing form a 90-degree angle, it is in the sealed connection state, which can be judged intuitively. At the same time, the handle is a rod-shaped structure, and the force arm is long during the rotation operation, making the operation more labor-saving.

[0013] The following further describes in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. Description of the Drawings

[0014] The drawings, as a part of this application, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, but do not constitute an improper limitation of the present utility model. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0015] Figure 1 is the structural schematic diagram of the present utility model;

[0016] Figure 2This is the front view of the present utility model;

[0017] Figure 3 This is the main sectional view of the present utility model.

[0018] In the figure: 1, main pipe; 2, O-ring; 3, handle; 4, pin; 5, buckle; 6, inner groove body; 7, inner spring; 8, spring lower cover; 9, spring upper cover; 10, housing; 11, valve core; 12, outer spring; 13, convex body; 14, rubber ring.

[0019] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0021] As Figures 1 to 3 shown, an internal expansion type quick connector includes an inner groove body 6 and a convex body 13. One end of the inner groove body 6 away from the convex body 13 is connected to a housing 10. A valve core 11 is arranged inside the housing 10. A spring lower cover 8 and a spring upper cover 9 are arranged between the valve core 11 and the inner wall of the housing 10. An outer spring 12 is arranged outside the valve core 11 between the spring upper cover 9 and the spring lower cover 8. A handle 3 is arranged outside the spring upper cover 9. One end of the handle 3 is connected to the end of the valve core 11 through a pin 4. A buckle 5 is arranged at one end of the pin 4. One end of the handle 3 close to the spring upper cover 9 is of a flange structure. The other end of the valve core 11 is connected to a main pipe 1. One end of the main pipe 1 away from the valve core 11 is connected to the convex body 13. A rubber ring 14 is arranged between the outer side of the convex body 13 and the inner groove body 6. An inner spring 7 is arranged inside the inner groove body 6.

[0022] Among them, the valve core 11 is of a three-stage stepped structure. An installation groove is opened at one end of the handle 3 close to the spring upper cover 9. The small end of the valve core 11 is matched with the installation groove. A through hole is arranged at the corresponding position where the small end of the valve core 11 is matched with the installation groove. The pin 4 passes through the through hole to realize the rotational connection between the valve core 11 and the handle 3.

[0023] Central holes are correspondingly arranged on both the spring upper cover 9 and the spring lower cover 8. The valve core 11 passes through the corresponding central holes. The spring lower cover 8 is embedded and installed in the cavity of the housing 10. The outer end of the spring upper cover 9 is located outside the housing 10.

[0024] A threaded hole is provided on the end face of one end of the valve core 11 close to the inner groove body 6. The valve core 11 is threadedly connected to the main pipe 1. One end of the handle 3 located inside the inner groove body 6 is provided with a mating groove. The end specifications of the main pipe 1 are adapted to the specifications of the mating groove, so as to realize the horizontal movement of the main pipe 1 driving the convex body 13 towards the end close to the handle 3.

[0025] A sealing groove is opened on the mating plane of the main pipe 1 and the convex body 13. An O-ring 2 is installed in the sealing groove to improve the sealing performance of the cooperation between the main pipe 1 and the convex body 13.

[0026] The working principle of the present utility model is as follows: After the quick connector is inserted into the inner hole of the blocked tooling, the handle 3 is rotated so that the handle 3 rotates 90 degrees with the pin 4 as the fulcrum. Since one end of the handle 3 close to the spring upper cover 9 is designed with a flange structure, a displacement difference will be generated during the 90-degree rotation. Due to the displacement difference, the pin 4 drives the valve core 11 to move outwards. The valve core 11 is fixedly connected to the main pipe 1, and then drives the main pipe 1 and the convex body 13 to move in the same direction. Since the inner groove body 6 is fixed, the rubber ring 14 is squeezed by the convex body 13 and the inner groove body 6, so that the rubber ring 14 and the inner hole of the blocked tooling are further tightened. The rubber ring 14, the inner groove body 6, the main pipe 1, and the O-ring 2 form a sealing cavity, achieving the effect of blocking the inner hole of the blocked tooling;

[0027] When the quick connector is pulled out of the inner hole of the blocked tooling, the handle 3 rotates back 90 degrees with the pin 4 as the fulcrum. Under the action of the inner spring 7, the valve core 11, the main pipe 1, and the convex body 13 move back. Since the rubber ring 14 is not under the action of extrusion force, it naturally expands and also disengages from the inner wall of the inner hole of the blocked tooling, achieving the effect of easily pulling out the quick connector;

[0028] The quick connector of the present utility model is provided with a handle 3, a pin 4, a main pipe 1, a valve core 11, an inner spring 7, a convex body 13, and an outer spring 12. By rotating the handle 3, the main pipe 1 and the valve core 11 are driven to move positions. A rubber ring 14 is provided between the convex body 13 and the inner groove body 6. As the convex body 13 moves, the rubber ring 14 is squeezed to closely fit with the inner hole of the blocked tooling, realizing quick connection. The connection state of the quick connector can be judged by observing the position of the handle 3. When the handle 3 is in the same straight line as the housing 10, it is in the natural state. When the handle 3 forms a 90-degree angle with the housing 10, it is in the sealed connection state, which can be judged intuitively. At the same time, the handle 3 is in a rod-shaped structure, and the lever arm is long during the rotation operation, making the operation more labor-saving.

[0029] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present utility model, can make some changes or modifications using the technical content prompted above as equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An internally expanding quick connector, comprising an inner groove body (6) and a convex body (13), characterized in that, One end of the inner groove body (6) away from the convex body (13) is connected to the housing (10). A valve core (11) is arranged inside the housing (10). A spring lower cover (8) and a spring upper cover (9) are arranged between the valve core (11) and the inner wall of the housing (10). An outer spring (12) is arranged outside the valve core (11) between the spring upper cover (9) and the spring lower cover (8). A handle (3) is arranged outside the spring upper cover (9). One end of the handle (3) is connected to the end of the valve core (11) through a pin (4). A buckle (5) is arranged at one end of the pin (4). One end of the handle (3) close to the spring upper cover (9) is of a flange structure. The other end of the valve core (11) is connected to the main pipe (1). One end of the main pipe (1) away from the valve core (11) is connected to the convex body (13). A rubber ring (14) is arranged between the outer side of the convex body (13) and the inner groove body (6). An inner spring (7) is arranged inside the inner groove body (6).

2. The internal expansion type quick connector according to claim 1, characterized in that, The valve core (11) is of a three-stage stepped structure. An installation groove is formed at one end of the handle (3) close to the spring upper cover (9). The small end of the valve core (11) is matched with the installation groove. A through hole is arranged at the corresponding position where the small end of the valve core (11) is matched with the installation groove. The pin (4) passes through the through hole.

3. The internal expansion type quick connector according to claim 2, characterized in that, Central holes are correspondingly arranged on both the spring upper cover (9) and the spring lower cover (8). The valve core (11) passes through the corresponding central holes. The spring lower cover (8) is embedded and installed in the cavity of the housing (10). The outer end of the spring upper cover (9) is located outside the housing (10).

4. The internal expansion type quick connector according to claim 3, wherein, A threaded hole is arranged on the end face of the valve core (11) close to the inner groove body (6). The valve core (11) and the main pipe (1) are connected by threads. A matching groove is arranged at one end of the handle (3) located inside the inner groove body (6). The end specifications of the main pipe (1) are adapted to the specifications of the matching groove.

5. The internal expansion type quick connector according to claim 4, characterized in that, A sealing groove is formed on the combined plane of the matching groove of the main pipe (1) and the convex body (13). An O-ring (2) is installed in the sealing groove.

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