Air conditioning system pipeline connection device and air conditioning system stop valve

Abstract

An air conditioning system pipeline connection device and an air conditioning system stop valve, an air conditioning system pipeline connection device includes an external thread interface, a sealing ring, a flexible joint, a fastening nut and a guide tube, the intersection of the end face of the external thread interface and the inner cavity is chamfered at a right angle to form an oblique sealing surface; the flexible joint includes a plug-in sealing part, an annular baffle and a connecting pipe part, the plug-in sealing part is provided with at least two sealing grooves and a shoulder, and the connecting pipe part is provided with a plug-in countersunk hole; a circular hole is provided on the end plate with an open end and a closed end of the fastening nut; the sealing ring is arranged in the sealing groove, the plug-in sealing part is inserted into the external thread interface, the fastening nut is screwed with the external thread interface, the oblique sealing surface and the shoulder are slidably matched and sealed, the annular baffle is fitted with the end plate, the connecting pipe extends out of the circular hole to fasten the nut, and the guide tube is inserted into the plug-in countersunk hole for fixing and sealing. The oblique sealing surface of the external thread interface and the shoulder on the flexible joint are arranged and cooperate with each other to achieve sealing in the event of failure of the sealing ring.

Description

Technical Field

[0001] The utility model relates to an air conditioning system, in particular to a pipeline connecting device. Background Art

[0002] Currently available technologies, such as Figure 1 As shown, an air conditioning system pipeline connection device includes an external thread interface 1, a sealing ring 2, a flexible joint 3, a fastening nut 4 and a guide tube 5. The flexible joint includes a plug-in sealing part, an annular baffle and a connecting pipe part. The plug-in sealing part is provided with at least two sealing grooves. The fastening nut is open at one end and a circular hole is provided on the end plate at the closed end. The flexible joint and the guide tube are made of metal pipes in one piece. The problem is that when the sealing ring fails, air leaks, especially during the maintenance period, which poses a safety hazard. Utility Model Content

[0003] The utility model aims to provide a pipe connection device for an air conditioning system, which has the characteristic of still maintaining sealing when the sealing ring fails to seal.

[0004] The utility model is realized in this way: an air conditioning system pipeline connection device, which is special in that it includes an external thread interface, a sealing ring, a flexible joint, a fastening nut and a guide pipe,

[0005] The intersection of the end face of the external thread interface and the inner cavity is chamfered at a right angle to form an oblique sealing surface;

[0006] The flexible joint comprises a plug-in sealing part, an annular baffle and a connecting pipe part, the plug-in sealing part is provided with at least two sealing grooves and a shoulder, and the connecting pipe part is provided with a plug-in countersunk hole;

[0007] The fastening nut is open at one end and provided with a circular hole on the end plate at the closed end;

[0008] The sealing ring is arranged in the sealing groove, the plug-in sealing part is inserted into the external thread interface, the fastening nut is screwed with the external thread interface, the oblique sealing surface and the shoulder are slidably matched and sealed, the annular baffle is fitted with the end plate, the connecting pipe part extends out of the circular hole to fasten the nut, and the guide pipe is inserted into the plug-in countersunk hole for fixation and sealing.

[0009] The special feature of the air conditioning system pipeline connection device is that there is a gap between the end surface of the external thread interface and the annular baffle.

[0010] The air conditioning system pipe connection device is special in that the intersection of the axial end face and the circumferential face of the shoulder is rounded, and the rounded corner of the shoulder is slidably matched with the oblique sealing surface and sealed.

[0011] The special feature of the air conditioning system pipeline connection device is that the external thread interface also includes a hexagonal tool part and an end pipe part.

[0012] A stop valve for an air conditioning system is special in that it comprises the air conditioning system pipeline connecting device as described above.

[0013] The utility model discloses an air conditioning system pipeline connection device. The external thread interface oblique sealing surface and the upper shoulder of the flexible joint are arranged and matched with each other, so as to maintain the seal in the case of failure of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the prior art.

[0015] Figure 2 It is a cross-sectional view of the utility model.

[0016] Figure 3 yes Figure 2 A partial enlarged view of .

[0017] Figure 4 It is a cross-sectional view of a second embodiment of the present utility model. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figure 2 As shown, an air conditioning system pipeline connection device includes an external thread interface 1, a sealing ring 2, a flexible joint 3, a fastening nut 4 and a guide tube 5.

[0021] The intersection of the end face of the external thread interface 1 and the inner cavity is chamfered at a right angle to form an inclined sealing surface 11;

[0022] The flexible joint 3 includes a plug-in sealing portion 31, an annular baffle 32 and a pipe connecting portion 33. The plug-in sealing portion 31 is provided with two sealing grooves 311 and a shoulder 312, and the shoulder 312 is rounded. The pipe connecting portion 33 is provided with a plug-in countersunk hole 331.

[0023] The fastening nut 4 is open at one end and provided with a circular hole on the end plate at the closed end;

[0024] The sealing ring 2 is arranged in the sealing groove 311, the plug-in sealing part 31 is inserted into the external thread interface 1, the fastening nut 4 is screwed with the external thread interface 1, the oblique sealing surface 11 and the chamfered corner of the shoulder 312 are slidably matched and sealed, the annular baffle 32 is fitted with the end plate of the fastening nut 4, the connecting pipe part 33 extends out of the circular hole to fasten the nut 4, and the guide tube 5 is inserted into the plug-in countersunk hole 331 to be fixed and sealed.

[0025] As a further improvement of the present invention: there is a gap between the end surface of the external thread interface 1 and the annular baffle 32 .

[0026] The intersection of the axial end surface and the circumferential surface of the shoulder 312 is rounded, and the rounded corner of the shoulder is slidably matched with the inclined sealing surface 11 and sealed.

[0027] As a further improvement of the present invention, the external thread interface 1 further comprises a hexagonal tool portion 12 and an end pipe portion 13 .

[0028] like Figure 4 As shown, an air conditioning system stop valve 6 includes the air conditioning system pipeline connecting device as described above.

[0029] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air conditioning system pipeline connection device, characterized in that: It includes external thread interface, sealing ring, union, fastening nut and guide tube. The intersection of the end face of the external thread interface and the inner cavity is chamfered at a right angle to form an oblique sealing surface; The flexible joint comprises a plug-in sealing part, an annular baffle and a connecting pipe part, the plug-in sealing part is provided with at least two sealing grooves and a shoulder, and the connecting pipe part is provided with a plug-in countersunk hole; The fastening nut is open at one end and provided with a circular hole on the end plate at the closed end; The sealing ring is arranged in the sealing groove, the plug-in sealing part is inserted into the external thread interface, the fastening nut is screwed with the external thread interface, the oblique sealing surface and the shoulder are slidably matched and sealed, the annular baffle is fitted with the end plate, the connecting pipe part extends out of the circular hole to fasten the nut, and the guide pipe is inserted into the plug-in countersunk hole for fixation and sealing.

2. The air conditioning system pipe connection device according to claim 1, characterized in that: There is a gap between the end surface of the external thread interface and the annular baffle.

3. The air conditioning system pipe connection device according to claim 1, characterized in that: The intersection of the axial end face and the circumferential face of the shoulder is rounded, and the rounded corner of the shoulder is slidably matched with the oblique sealing surface and sealed.

4. An air conditioning system pipe connection device according to claim 1, 2 or 3, characterized in that: The external thread interface also includes a hexagonal tool portion and an end pipe portion.

5. A stop valve for an air conditioning system, characterized in that: It comprises the air conditioning system pipeline connecting device as described in any one of claims 1 to 3.

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