One-way valve

Abstract

The utility model discloses a one-way valve which comprises a valve body, two ends of the valve body are respectively connected with an input pipe and an output pipe, and a valve core is arranged in the valve body. The inlet end of the input pipe and the outlet end of the output pipe are both connected with copper sleeves which are used for being connected with external copper pipes, and the valve body is of a stainless steel structure. The valve body is novel in structure, and compared with a copper valve body in the prior art, the manufacturing cost is greatly reduced.

Description

Technical Field

[0001] This utility model belongs to the field of one-way valve technology, and in particular relates to a one-way valve. Background Technology

[0002] A one-way valve, also known as a check valve or non-return valve, is a type of valve in which fluid can only flow along the inlet and cannot flow back along the outlet. It is commonly used in refrigeration equipment.

[0003] The existing check valves are welded to external copper pipes at both ends, and the valve body is made of copper. However, copper is expensive, which leads to a high manufacturing cost for the check valves.

[0004] Existing patent document (publication number: CN206017916U) discloses "a one-way valve", the technical solution of which is that the valve body is made of copper, and it also has the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and to provide a one-way valve with a novel structure, which greatly reduces the cost compared with the copper valve body in the prior art.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A one-way valve includes: a valve body, with an input pipe and an output pipe connected to its two ends respectively, and a valve core disposed within the valve body; characterized in that: a copper sleeve is connected to both the inlet end of the input pipe and the outlet end of the output pipe, the copper sleeve being used to connect to an external copper pipe, and the valve body being made of stainless steel. This one-way valve has a novel structure and significantly reduces costs compared to copper valve bodies in existing technologies.

[0008] Furthermore, both the input and output pipes protrude outwards to form positioning parts, which abut against and are welded to the end face of the copper sleeve. When the end face of the copper sleeve abuts against the positioning part, it indicates that the copper sleeve is installed in place, reducing the difficulty of positioning. Welding is then performed on the contact surface between the positioning part and the copper sleeve to achieve a secure and reliable fixation of the copper sleeve.

[0009] Furthermore, the valve body includes a valve shell, a left end cover, and a right end cover. The left and right end covers are respectively located at both ends of the valve shell. The left end cover connects to the input pipe, and the right end cover connects to the output pipe. The valve body adopts a split structure design. Compared with a one-piece molded structure, each component can be manufactured separately, which reduces manufacturing requirements and lowers mold costs.

[0010] Furthermore, the left end cap includes a first sleeve portion, a left connecting portion, and a second sleeve portion. The left connecting portion connects the first sleeve portion and the second sleeve portion. The first sleeve portion is sleeved with and welded to the input pipe, and the second sleeve portion is sleeved with and welded to the valve body. The structure is simple, robust, reliable, highly adaptable, and provides good sealing to prevent fluid leakage.

[0011] Furthermore, the first connecting part, the left connecting part, and the second connecting part are integrally molded structures. This allows for rapid molding, good consistency, structural stability, the absence of seams, and reliable use.

[0012] Furthermore, the right end cap includes a third sleeve, a right connecting part, and a fourth sleeve. The right connecting part connects the third sleeve and the fourth sleeve. The third sleeve is sleeved with the output pipe and welded to it. The fourth sleeve is sleeved with the valve body and welded to it. The structure is simple, robust, reliable, highly adaptable, and has good sealing performance, preventing fluid leakage.

[0013] Furthermore, the third connecting part, the right connecting part, and the fourth connecting part are integrally molded structures. This allows for rapid molding, good consistency, structural stability, the absence of seams, and reliable use.

[0014] Furthermore, a sealing ring is provided between the fourth sleeve and the valve core. The sealing ring is used to seal the gap between the valve core and the right end cover, which improves the sealing performance and prevents fluid from leaking from the gap between the valve core and the right end cover.

[0015] Furthermore, the sealing ring is fitted inside the fourth sleeve and welded in place. The connection is reliable, the sealing ring is not easily loosened, and the installation stability is high. The sealing ring is in close contact with the inner wall of the fourth sleeve and the inner wall of the right connecting part, ensuring good sealing and preventing leakage.

[0016] Furthermore, the valve body has an outward protrusion, and both the left and right end covers have corresponding positioning grooves. During the assembly process, the positioning grooves fit over the outward protrusions, achieving positioning and assembly between the valve body and the left and right end covers. The left and right end covers will not rotate circumferentially relative to the valve body, resulting in high assembly stability. This also increases the contact area between the valve body and the left and right end covers, thereby improving the connection strength.

[0017] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0018] 1. The valve body is made of stainless steel, which greatly reduces manufacturing costs compared to the copper valve body in the existing technology. The style of the copper sleeve can be selected to suit different needs, making it easy to assemble accurately with the external copper pipe, which is flexible and convenient.

[0019] 2. When the end face of the copper sleeve abuts against the positioning part, it indicates that the copper sleeve is installed in place, reducing the difficulty of positioning. Weld the contact surface between the positioning part and the copper sleeve to fix the copper sleeve, making it stable and reliable.

[0020] 3. The sealing ring seals the gap between the valve core and the right end cover, providing a good seal and preventing fluid leakage from the gap between the valve core and the right end cover. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of Example 1;

[0024] Figure 3 This is a schematic diagram of the connection between the valve body and the left and right end caps in Embodiment 1;

[0025] Figure 4 This is a schematic diagram of the connection between the output tube and the copper sleeve in Example 1;

[0026] Figure 5 This is an exploded structural diagram of Example 1;

[0027] Figure 6 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0028] Figure 7 This is a schematic diagram of the connection between the valve body and the right end cover in Embodiment 2.

[0029] In the diagram: 1-Valve body; 2-Input pipe; 3-Output pipe; 4-Valve core; 5-Copper sleeve; 6-Positioning part; 7-Valve shell; 8-Left end cover; 9-Right end cover; 10-First socket; 11-Left connecting part; 12-Second socket; 13-Third socket; 14-Right connecting part; 15-Fourth socket; 16-Sealing ring; 17-Outer protrusion; 18-Positioning groove. Detailed Implementation

[0030] like Figures 1 to 5 The image shown is an embodiment of this utility model.

[0031] A one-way valve includes: a valve body 1, with an input pipe 2 and an output pipe 3 connected to its two ends respectively; a valve core 4 is provided inside the valve body 1; a copper sleeve 5 is connected to the inlet end of the input pipe 2 and the outlet end of the output pipe 3; the copper sleeve 5 is used to connect to an external copper pipe; the valve body 1 is made of stainless steel, which greatly reduces the manufacturing cost compared to the copper valve body 1 in the prior art; and the style of the copper sleeve 5 can be selected adaptably, making it easy to accurately assemble with the external copper pipe, which is flexible and convenient.

[0032] Both the input pipe 2 and the output pipe 3 have outwardly protruding positioning parts 6. The positioning parts 6 abut against the end face of the copper sleeve 5 and are welded to fix it. When the end face of the copper sleeve 5 abuts against the positioning part 6, it indicates that the copper sleeve 5 is installed in place, reducing the positioning difficulty. Welding is performed on the contact surface between the positioning part 6 and the copper sleeve 5 to fix the copper sleeve 5 securely and reliably.

[0033] The valve body 1 includes a valve shell 7, a left end cover 8, and a right end cover 9. The left end cover 8 and the right end cover 9 are respectively located at both ends of the valve shell 7. The left end cover 8 is connected to the input pipe 2, and the right end cover 9 is connected to the output pipe 3. The valve body 1 adopts a split structure design. Compared with a one-piece molded structure, each component can be manufactured separately, which reduces manufacturing requirements and lowers mold costs.

[0034] The left end cap 8 includes a first socket 10, a left connecting part 11, and a second socket 12. The left connecting part 11 connects the first socket 10 and the second socket 12. The first socket 10, the left connecting part 11, and the second socket 12 are integrally formed, allowing for rapid molding, good consistency, structural stability, and no seams, ensuring reliable use. The first socket 10 is sleeved and welded to the input pipe 2, and the second socket 12 is sleeved and welded to the valve body 7. The structure is simple, robust, reliable, highly adaptable, and provides good sealing to prevent fluid leakage.

[0035] The right end cap 9 includes a third socket 13, a right connecting part 14, and a fourth socket 15. The right connecting part 14 connects the third socket 13 and the fourth socket 15. The third socket 13, right connecting part 14, and fourth socket 15 are integrally molded, allowing for rapid prototyping, good consistency, structural stability, and no seams, ensuring reliable use. The third socket 13 is sleeved and welded to the output pipe 3, and the fourth socket 15 is sleeved and welded to the valve body 7. The structure is simple, robust, reliable, highly adaptable, and provides good sealing to prevent fluid leakage.

[0036] A sealing ring 16 is provided between the fourth sleeve part 15 and the valve core 4. The valve core 4 is located inside the valve body 7. The sealing ring 16 is made of metal and is sleeved on the bottom of the valve core 4. The sealing ring 16 is sleeved inside the fourth sleeve part 15 and welded and fixed, ensuring reliable connection. The sealing ring 16 is not easy to loosen freely, and the installation stability is high. The sealing ring 16 is in close contact with the inner wall of the fourth sleeve part 15 and the inner wall of the right connecting part 14, sealing the gap between the valve core 4 and the right end cover 9. The sealing performance is good, preventing fluid from leaking from the gap between the valve core 4 and the right end cover 9.

[0037] The end face of the valve housing 7 abuts against the sealing ring 16. During installation, when the end face of the valve housing 7 abuts against the sealing ring 16, it indicates that the valve housing 7 and the right end cover 9 are connected in place, which reduces the difficulty of docking and improves the assembly efficiency.

[0038] like Figure 6 and Figure 7 The image shown is a second embodiment of this utility model.

[0039] In the technical solution based on Embodiment 1, the surface of the valve housing 7 protrudes outward to form an outward convex portion 17, and the inner wall of the second sleeve portion 12 and the inner wall of the fourth sleeve portion 15 are provided with positioning grooves 18 corresponding to the outward convex portion 17. The valve body 1 is made of stainless steel or brass.

[0040] During the docking process, the positioning groove 18 is fitted over the protrusion 17 to achieve positioning docking between the valve body and the left end cover 8 and the right end cover 9. The left end cover 8 and the right end cover 9 will not rotate circumferentially relative to the valve body, resulting in high assembly stability. Furthermore, the contact area between the valve body and the left end cover 8 and the right end cover 9 is increased, thereby improving the connection strength.

[0041] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A one-way valve, comprising: A valve body, with an input pipe and an output pipe connected to its two ends respectively, and a valve core disposed inside the valve body; Its features are: The inlet end of the input pipe and the outlet end of the output pipe are both connected to copper sleeves, which are used to connect to external copper pipes. The valve body is made of stainless steel.

2. A one-way valve according to claim 1, characterized in that: Both the input tube and the output tube have outwardly protruding positioning parts, which abut against and are welded to the end face of the copper sleeve.

3. A one-way valve according to claim 1, characterized in that: The valve body includes a valve shell, a left end cover, and a right end cover. The left end cover and the right end cover are respectively located at both ends of the valve shell. The left end cover is connected to the input pipe, and the right end cover is connected to the output pipe.

4. A one-way valve according to claim 3, characterized in that: The left end cap includes a first sleeve portion, a left connecting portion, and a second sleeve portion. The left connecting portion connects the first sleeve portion and the second sleeve portion. The first sleeve portion is sleeved with and welded to the input pipe, and the second sleeve portion is sleeved with and welded to the valve body.

5. A one-way valve according to claim 4, characterized in that: The first socket, the left connecting part, and the second socket are integrally formed.

6. A one-way valve according to claim 3, characterized in that: The right end cap includes a third sleeve, a right connecting part, and a fourth sleeve. The right connecting part connects the third sleeve and the fourth sleeve. The third sleeve is sleeved with and welded to the output pipe. The fourth sleeve is sleeved with and welded to the valve body.

7. A one-way valve according to claim 6, characterized in that: The third socket, the right connecting part, and the fourth socket are integrally formed structures.

8. A one-way valve according to claim 6, characterized in that: A sealing ring is provided between the fourth sleeve and the valve core, and the sealing ring is used to seal the gap between the valve core and the right end cover.

9. A one-way valve according to claim 8, characterized in that: The sealing ring is fitted inside the fourth sleeve and welded in place.

10. A one-way valve according to claim 3, characterized in that: The valve housing is provided with an outward protrusion, and the left end cover and the right end cover are both provided with positioning grooves corresponding to the outward protrusion.

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