Connecting structure of reversing valve

Abstract

The utility model discloses a connecting structure of a reversing valve, and particularly relates to the technical field of reversing valves, a valve body is connected with a valve pipe, the end part of the valve pipe is provided with a sealing groove, a sealing assembly is arranged in the sealing groove, a connecting pipe is inserted in the sealing assembly, a locking sleeve is connected between the connecting pipe and the valve pipe, and the locking sleeve is connected with the valve pipe. The locking sleeve is in spiral connection with the valve pipe to fix the connecting pipe, so that the sealing assembly deforms to conduct multi-channel sealing on connection between the connecting pipe and the valve pipe, an annular groove is formed in the sealing groove, and an inner cylinder is arranged at the end of the valve pipe. The distance between the annular groove and the end of the inner cylinder is smaller than the distance between the annular groove and the end of the valve pipe, a baffle ring is arranged at one end of the locking sleeve, and a fixing ring is arranged at one end of the connecting pipe. The reversing valve has the advantages that a pipeline connected with the reversing valve can be conveniently detached and replaced, corrosion connection caused by long-time use is avoided, and the sealing performance is high.

Description

Technical Field

[0001] The utility model relates to the technical field of reversing valves, and more specifically, to a connecting structure of a reversing valve. Background Art

[0002] As an important component of the air-conditioning system, the four-way reversing valve mainly includes a main valve, a pilot valve and an electromagnetic coil. It is used to change the flow direction of the coolant, so that the heat exchange system can switch between heating and cooling working states, achieving the dual working purposes of cooling in summer and heating in winter.

[0003] The utility model patent with patent announcement number CN218208231U discloses a pipe connection structure on a four-way reversing valve, which includes a hollow connecting copper tube and a hollow connecting steel tube. A positioning structure is provided on the inner wall of the connecting copper tube near the bottom end. The top end of the connecting steel tube extends into the inner cavity of the bottom end of the connecting copper tube and is positioned by the positioning structure. The top end of the connecting steel tube is fixed to the inner wall of the connecting copper tube by brazing, and the bottom end of the connecting copper tube is fixed to the outer wall of the connecting steel tube by fusion welding. After welding is completed, the entire connecting steel tube and connecting copper tube have almost no changes in appearance and performance, so the welding quality and the qualified rate of the finished product can be effectively guaranteed.

[0004] However, in actual use, this structure is connected by welding, so when any pipeline is damaged, the entire reversing valve cannot be used again, or all pipelines need to be replaced, which is difficult and inefficient, and increases the replacement cost. Therefore, a connection structure of the reversing valve is proposed. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a connection structure of a reversing valve to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a connection structure of a reversing valve, wherein the valve body is connected to a valve tube, a sealing groove is provided at the end of the valve tube, a sealing assembly is installed in the sealing groove, a connecting tube is inserted in the sealing assembly, a locking sleeve is connected between the connecting tube and the valve tube, the locking sleeve is spirally connected to the valve tube to fix the connecting tube, so that the sealing assembly is deformed to perform multiple seals on the connection between the connecting tube and the valve tube.

[0007] By putting the locking sleeve on the connecting pipe, then putting the sealing assembly on one end of the connecting pipe, and then putting the sealing assembly into the sealing groove opened at the end of the valve pipe, the locking sleeve is screwed onto the valve pipe. During the tightening process, the retaining ring is used to push the fixing ring so that the sealing assembly enters the sealing groove, and the sealing assembly is plugged into the annular groove. After the sealing assembly is continuously subjected to force and deformed, the connection between the valve pipe and the connecting pipe is sealed, thereby improving the sealing performance. When disassembling, the locking sleeve can be directly unscrewed to separate the connecting pipe, thereby improving the convenience of disassembly, facilitating the subsequent disassembly and replacement of the connecting pipe, improving maintenance efficiency, and reducing maintenance costs.

[0008] Preferably, an annular groove is provided inside the sealing groove, an inner cylinder is provided at the end of the valve tube, and the distance between the annular groove and the end of the inner cylinder is smaller than the distance between the annular groove and the end of the valve tube.

[0009] Preferably, a retaining ring is provided at one end of the locking sleeve, and a fixing ring is provided at one end of the connecting pipe, and the retaining ring is slidably fitted with the connecting pipe.

[0010] Preferably, the sealing assembly includes an outer sealing sleeve, an inner sealing sleeve, a sealing ring, a sealing gasket and an isolation ring. The outer sealing sleeve is coaxially arranged outside the inner sealing sleeve. One end of the outer sealing sleeve and the inner sealing sleeve are commonly connected to an annular sealing sheet. The bottom end of the annular sealing sheet is provided with a sealing ring, and the sealing ring corresponds to the annular groove. The other end of the outer sealing sleeve is provided with a sealing gasket, and the other end of the inner sealing sleeve is provided with an isolation ring.

[0011] Preferably, the isolation ring is extruded on the end of the inner cylinder, and the inner diameter of the isolation ring is the same as that of the inner cylinder.

[0012] Preferably, the outer sealing sleeve, the inner sealing sleeve and the annular sealing sheet are connected to form a slot, the slot is annular in structure, and the ring diameter of the slot gradually decreases.

[0013] The technical effects and advantages of this utility model are:

[0014] 1. Compared with the prior art, the arrangement of the outer sealing sleeve, inner sealing sleeve, sealing ring, sealing gasket and isolation ring realizes the first seal by squeezing the isolation ring on the end of the inner cylinder, the second seal by the cooperation between the sealing ring and the annular groove, and the third seal by the compression deformation of the sealing gasket, thereby realizing multiple seals, thereby improving the sealing performance of the connection between the valve pipe and the connecting pipe. The detachable design facilitates the subsequent replacement of the connecting pipe when it is damaged, which improves the replacement efficiency and avoids damage to the valve pipe, thereby reducing maintenance costs.

[0015] 2. Through the arrangement of the sealing gasket, the isolation ring and the inner tube, compared with the prior art, by shortening the length of the inner tube and compensating with the isolation ring, the inner tube and the sealing gasket can cooperate to completely isolate the valve body and the connecting pipe, thereby avoiding the accumulation of dirt or rust inside due to long-term use, which causes the valve body and the connecting pipe to be connected together, making it easy to disassemble and replace, avoiding damage to the valve pipe, and thus improving the service life of the reversing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the connection between the connecting pipe and the valve pipe of the present invention.

[0018] Figure 3 This is a schematic diagram of the valve tube end structure of the present utility model.

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the sealing component of the present invention.

[0020] Figure 5 This is a schematic diagram of the front structure of the sealing component of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the connecting pipe end portion of the present invention.

[0022] The figures are marked as follows: 1. valve body; 2. valve tube; 3. connecting tube; 4. locking sleeve; 5. sealing assembly; 501. outer sealing sleeve; 502. inner sealing sleeve; 503. sealing ring; 504. sealing gasket; 505. isolation ring; 6. sealing groove; 7. annular groove; 8. inner cylinder; 9. slot; 10. fixing ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] As attached Figure 1-6The figure shows a connection structure of a reversing valve, wherein a valve body 1 is connected to a valve tube 2, a sealing groove 6 is provided at the end of the valve tube 2, a sealing assembly 5 is installed in the sealing groove 6, a connecting tube 3 is inserted in the sealing assembly 5, a locking sleeve 4 is connected between the connecting tube 3 and the valve tube 2, the locking sleeve 4 is spirally connected to the valve tube 2 to fix the connecting tube 3, so that the sealing assembly 5 is deformed to perform multiple sealing on the connection between the connecting tube 3 and the valve tube 2, an annular groove 7 is provided inside the sealing groove 6, an inner tube 8 is provided at the end of the valve tube 2, the distance between the annular groove 7 and the end of the inner tube 8 is smaller than the distance between the annular groove 7 and the end of the valve tube 2, a retaining ring is provided at one end of the locking sleeve 4, and a fixing ring 10 is provided at one end of the connecting tube 3, and the retaining ring is slidably fitted with the connecting tube 3.

[0025] In the specific implementation, the locking sleeve 4 is sleeved on the connecting pipe 3, and the sealing component 5 is sleeved on one end of the connecting pipe 3, and then the sealing component 5 is placed in the sealing groove 6 opened at the end of the valve pipe 2, and the locking sleeve 4 is used to screw it onto the valve pipe 2. During the tightening process, the retaining ring 10 is used to push the sealing component 5 into the sealing groove 6, and the sealing component 5 is plugged into the annular groove 7. After the sealing component 5 is continuously subjected to force and deformed, the connection between the valve pipe 2 and the connecting pipe 3 is sealed, thereby improving the sealing performance. When disassembling, the locking sleeve 4 can be directly unscrewed to separate the connecting pipe 3, thereby improving the convenience of disassembly, so as to facilitate the subsequent disassembly and replacement of the connecting pipe 3, improve maintenance efficiency, and reduce maintenance costs.

[0026] The sealing assembly 5 includes an outer sealing sleeve 501, an inner sealing sleeve 502, a sealing ring 503, a sealing gasket 504 and an isolation ring 505. The outer sealing sleeve 501 is coaxially arranged outside the inner sealing sleeve 502. One end of the outer sealing sleeve 501 and the inner sealing sleeve 502 are commonly connected with an annular sealing sheet. The bottom end of the annular sealing sheet is provided with a sealing ring 503. The sealing ring 503 corresponds to the annular groove 7. The other end of the outer sealing sleeve 501 is provided with a sealing gasket 504. The other end of the inner sealing sleeve 502 is provided with an isolation ring 505. The isolation ring 505 is squeezed on the end of the inner cylinder 8, and the inner diameter of the isolation ring 505 is the same as the inner diameter of the inner cylinder 8. The outer sealing sleeve 501, the inner sealing sleeve 502 and the annular sealing sheet are connected to form a slot 9. The slot 9 has an annular structure, and the ring diameter of the slot 9 gradually decreases.

[0027] During specific implementation, the outer sealing sleeve 501 and the inner sealing sleeve 502 are squeezed by the connecting pipe 3, so that the outer sealing sleeve 501 and the inner sealing sleeve 502 are deformed, thereby sealing the gap between the connecting pipe 3 and the sealing groove 6, and the sealing ring 503 is squeezed in the annular groove 7 to form isolation, thereby further improving the sealing performance. The isolation ring 505 compensates for the end of the inner tube 8 and isolates the connection between the connecting pipe 3 and the inner tube 8 to avoid internal dirt accumulation or rust and adhesion due to long-term use, thereby avoiding damage to the valve pipe 2 due to rust due to the corrosion of the connecting pipe 3, so that the connecting pipe 3 made of low-cost material can be used without affecting the valve pipe 2 with rust. At the same time, due to the squeezing of the sealing gasket 504 by the fixing ring 10, the sealing effect can be further improved.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A connection structure of a reversing valve, characterized in that: The valve body (1) is connected to a valve tube (2), a sealing groove (6) is provided at the end of the valve tube (2), a sealing assembly (5) is installed in the sealing groove (6), a connecting tube (3) is inserted into the sealing assembly (5), a locking sleeve (4) is connected between the connecting tube (3) and the valve tube (2), the locking sleeve (4) is spirally connected to the valve tube (2) to fix the connecting tube (3), so that the sealing assembly (5) is deformed to perform multi-pass sealing on the connection between the connecting tube (3) and the valve tube (2); The sealing assembly (5) comprises an outer sealing sleeve (501), an inner sealing sleeve (502), a sealing ring (503), a sealing gasket (504) and an isolation ring (505); the outer sealing sleeve (501) is coaxially arranged outside the inner sealing sleeve (502); one end of the outer sealing sleeve (501) and the inner sealing sleeve (502) are connected to an annular sealing sheet; a sealing ring (503) is arranged at the bottom end of the annular sealing sheet; the sealing ring (503) corresponds to the annular groove (7); the other end of the outer sealing sleeve (501) is provided with a sealing gasket (504); the other end of the inner sealing sleeve (502) is provided with an isolation ring (505).

2. The connection structure of a reversing valve according to claim 1, characterized in that: An annular groove (7) is provided inside the sealing groove (6), an inner cylinder (8) is provided at the end of the valve tube (2), and the distance between the annular groove (7) and the end of the inner cylinder (8) is smaller than the distance between the annular groove (7) and the end of the valve tube (2).

3. The connection structure of a reversing valve according to claim 2, characterized in that: A retaining ring is provided at one end of the locking sleeve (4), and a fixing ring (10) is provided at one end of the connecting pipe (3), and the retaining ring and the connecting pipe (3) are in sliding cooperation.

4. The connection structure of a reversing valve according to claim 2, characterized in that: The isolation ring (505) is squeezed onto the end of the inner cylinder (8), and the inner diameter of the isolation ring (505) is the same as that of the inner cylinder (8).

5. The connection structure of a reversing valve according to claim 1, characterized in that: The outer sealing sleeve (501), the inner sealing sleeve (502) and the annular sealing sheet are connected to form a slot (9). The slot (9) is an annular structure, and the ring diameter of the slot (9) gradually decreases.

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