One-way valve capable of preventing valve element from rotating

Abstract

The one-way valve capable of preventing the valve element from rotating comprises a valve body, the two ends of the valve body are connected with an input pipe and an output pipe respectively, and the valve element is arranged in the valve body; a protruding part is arranged on the valve element, and a limiting groove corresponding to the protruding part is formed in the inner wall of the valve body so that the valve body can limit free rotation of the valve element. According to the utility model, the structure is novel, the valve core does not rotate freely, and the problems that the valve core rotates due to high-pressure impact force of a fluid medium, friction is generated between the valve core and the valve shell, noise is generated, the service life of the valve core is influenced, and debris generated by friction is mixed into the fluid medium and the use of subsequent equipment is influenced are solved.

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 that prevents the valve core from rotating on its own. 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] Existing check valves have defects during use: the valve core is constantly subjected to high-pressure impact from the fluid medium, causing it to rotate. Friction occurs between the valve core and the valve body, affecting the service life of the valve core and generating noise. The debris generated by friction mixed into the fluid medium can also affect the use of subsequent equipment.

[0004] To solve the above technical problems, the current approach is to axially set a limiting component on the end cap at one end of the valve body. However, such a structure is difficult to implement in actual production, resulting in high processing costs and difficulty in guaranteeing accuracy. 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 provide a one-way valve that prevents the valve core from rotating freely. The valve core will not rotate freely, preventing the valve core from rotating due to the high pressure impact of the fluid medium, which would cause friction between the valve core and the valve body, generate noise, affect the service life of the valve core, and the debris generated by friction mixed into the fluid medium would also affect the use of subsequent equipment.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A one-way valve to prevent valve core self-rotation includes: a valve body, with an input pipe and an output pipe connected to both ends of the valve body, and a valve core disposed within the valve body; characterized in that: the valve core has a protrusion, and the inner wall of the valve body has a limiting groove corresponding to the protrusion, so as to restrict the free rotation of the valve core. This one-way valve has a novel structure, preventing the valve core from rotating freely, thus preventing the valve core from rotating due to the high-pressure impact of the fluid medium. This prevents friction between the valve core and the valve body, which would generate noise, affect the service life of the valve core, and cause debris generated by friction to mix into the fluid medium, affecting the use of subsequent equipment.

[0008] Furthermore, both the inlet end of the input pipe and the outlet end of the output pipe are connected to copper sleeves. The copper sleeves are used to connect to external copper pipes. The valve body is made of stainless steel, which greatly reduces manufacturing costs compared to copper valve bodies in the prior art. Moreover, the style of the copper sleeves can be selected to suit different needs, making it easy to assemble accurately with external copper pipes, which is flexible and convenient.

[0009] 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.

[0010] 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.

[0011] 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 the input pipe and welded to it. The second sleeve portion is sleeved with the valve body and welded to it. The structure is simple, robust, reliable, and has strong adaptability to various connections. It also provides good sealing, preventing fluid media from leaking outwards.

[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 and welded to the output pipe, and the fourth sleeve is sleeved with and welded to the valve body. The structure is simple, robust, reliable, highly adaptable, and provides good sealing, preventing fluid media from leaking out.

[0013] Furthermore, the valve body is provided with an outward protrusion, and both the left and right end covers are provided with positioning grooves corresponding to the outward protrusion. During the docking process, the positioning grooves fit over the outward protrusions, achieving positioning and docking 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 and increasing the contact area between the valve body and the left and right end covers, thereby improving the connection strength.

[0014] Furthermore, a sealing ring is provided between the right end cover 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 medium from leaking from the gap between the valve core and the right end cover.

[0015] Furthermore, the sealing ring is fitted inside the right end cap 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 fitting and the inner wall of the right connecting part, ensuring good sealing and preventing leakage.

[0016] Furthermore, the sealing ring is provided with a positioning protrusion corresponding to the positioning groove. The positioning protrusion is embedded into the positioning groove of the fourth sleeve, enabling the sealing ring to be quickly positioned inside the right end cover. This reduces positioning difficulty, improves assembly efficiency, and ensures the sealing ring does not rotate freely relative to the right end cover, resulting in high stability. It also increases the contact area between the two, thereby improving the installation strength of the sealing ring.

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

[0018] 1. The protrusion of the valve core is located in the limiting groove of the valve body and cannot move. This restricts the free rotation of the valve core and prevents the valve core from rotating freely due to the high pressure impact of the fluid medium. This would cause friction between the valve core and the valve body, generate noise, and affect the service life of the valve core. The debris generated by friction mixed into the fluid medium will also affect the use of subsequent equipment.

[0019] 2. 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.

[0020] 3. During the docking process, the positioning groove fits over the protruding part, achieving positioning and docking of the valve body with 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. It also increases the contact area between the valve body and the left and right end covers, thereby improving the connection strength. 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 a one-way valve that prevents the valve core from rotating on its own, according to this utility model.

[0023] Figure 2 for Figure 1 The main view;

[0024] Figure 3 This is an exploded structural diagram of the present invention;

[0025] Figure 4 This is an exploded view of the valve body in this utility model.

[0026] 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 part; 11-Left connecting part; 12-Second socket part; 13-Third socket part; 14-Right connecting part; 15-Fourth socket part; 16-Sealing ring; 17-Outer protrusion; 18-Positioning groove; 19-Positioning protrusion; 20-Protrusion; 21-Limiting groove. Detailed Implementation

[0027] like Figures 1 to 4 As shown, this utility model discloses a one-way valve for preventing valve core self-rotation, comprising: a valve body 1, a valve core 4 disposed inside the valve body 1, an input pipe 2 and an output pipe 3 connected to both ends of the valve body 1 respectively, and a copper sleeve 5 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 or brass. The valve body 1 with a stainless steel structure greatly reduces the manufacturing cost compared with the copper valve body in the prior art, and the style of the copper sleeve 5 can be selected adaptably, which is convenient and flexible for accurate assembly with external copper pipes.

[0028] 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.

[0029] 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.

[0030] 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 media from leaking out.

[0031] 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, the right connecting part 14, and the fourth socket 15 are integrally formed, allowing for rapid molding, 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 media leakage.

[0032] The surface of the valve housing 7 protrudes outward to form an outward protrusion 17. 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 protrusion 17.

[0033] During the docking process, the positioning groove 18 fits onto the protruding part 17, thereby achieving the positioning and docking of the valve body with 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 7, 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.

[0034] A sealing ring 16 is provided between the fourth sleeve part 15 and the valve core 4. The sealing ring 16 is made of metal and is sleeved on the bottom of the valve core 4. 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. It has good sealing performance and prevents fluid medium from leaking from the gap between the valve core 4 and the right end cover 9.

[0035] The sealing ring 16 is fitted into the fourth sleeve part 15 and fixed by welding, ensuring a reliable connection. The sealing ring 16 is not easy to loosen freely, resulting in high installation stability.

[0036] The sealing ring 16 is provided with a positioning protrusion 19 corresponding to the positioning groove 18. The positioning protrusion 19 is embedded into the positioning groove 18 of the fourth sleeve part 15, so that the sealing ring 16 can be quickly positioned in the right end cover 9, which reduces the positioning difficulty and improves the assembly efficiency. The sealing ring 16 will not rotate freely relative to the right end cover 9, which has high stability and increases the contact area between the two, thereby improving the installation strength of the sealing ring 16.

[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] The valve core 4 has an integrally formed protrusion 20, and the inner wall of the valve housing 7 has a limiting groove 21 corresponding to the protrusion 20. The valve housing 7 can be formed by mold casting, that is, the limiting groove 21 is formed on the inner wall of the valve housing 7 in one step, without the need to process the limiting part separately. The protrusion 20 is located in the limiting groove 21 and cannot move, which can restrict the free rotation of the valve core 4 and prevent the valve core 4 from rotating due to the high pressure impact of the fluid medium, which would cause friction between the valve core 4 and the valve housing 7, generate noise, and affect the service life of the valve core 4. The debris generated by friction mixed into the fluid medium will also affect the use of subsequent equipment.

[0039] 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 check valve that prevents the valve core from rotating on its own, 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 valve core is provided with a protrusion, and the inner wall of the valve body is provided with a limiting groove corresponding to the protrusion, so that the valve body restricts the valve core from rotating freely.

2. A one-way valve for preventing valve core self-rotation according to claim 1, characterized in that: 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.

3. A one-way valve for preventing valve core self-rotation according to claim 2, 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.

4. A one-way valve for preventing valve core self-rotation 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.

5. A one-way valve for preventing valve core self-rotation according to claim 4, 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.

6. A one-way valve for preventing valve core self-rotation according to claim 4, 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 for preventing valve core self-rotation according to claim 4, 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.

8. A one-way valve for preventing valve core self-rotation according to claim 7, characterized in that: A sealing ring is provided between the right end cover 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 for preventing valve core self-rotation according to claim 8, characterized in that: The sealing ring is fitted inside the right end cap and welded in place.

10. A one-way valve for preventing valve core self-rotation according to claim 9, characterized in that: The sealing ring is provided with positioning protrusions corresponding to the positioning groove.

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