One-way valve

Abstract

The utility model provides a one-way valve which comprises a pipe body and a valve element connected into the pipe body in a sliding mode, and a sealing protruding ring which is inwards recessed in the radial direction of the pipe body is integrally formed on the inner wall of the pipe body. The valve element is provided with a cut-off position and a conduction position, the cut-off position is in sealing contact with one side of the sealing convex ring, the conduction position is separated from the sealing convex ring, and the valve element can be switched from the cut-off position to the conduction position under the action of fluid flowing towards one side of the valve element from the sealing convex ring. The sealing convex ring is integrally formed on the inner wall of the pipe body and is in sealing fit with the valve element, so that a corresponding valve seat does not need to be independently assembled in the pipe body, the corresponding valve seat does not need to be independently machined, machining of parts can be reduced, material cost and machining and assembling cost are reduced, assembling procedures are reduced, and assembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of design of one-way valve components for air conditioner pipelines, in particular to a one-way valve. Background Art

[0002] One-way valves are often used in refrigeration equipment such as air conditioners to control the one-way flow of fluids. Specifically, the one-way valve in the previously applied utility model patent (CN202120339761.5) includes a valve body, a valve core and a valve seat, wherein the valve seat is fixed in the valve body, and the valve core is movably arranged in the valve body. When assembling a one-way valve of this structure, the valve seat and the valve core need to be assembled in sequence in the assembly hole of the valve body, and finally positioned. The valve seat needs to be processed and assembled separately, resulting in high material costs and processing and assembly costs. Based on the aforementioned deficiencies in the prior art, the present utility model is proposed. Utility Model Content

[0003] The one-way valve designed in the present invention can at least partially solve the above problems.

[0004] The utility model aims to provide a one-way valve, comprising a tube body and a valve core slidably connected to the tube body, the inner wall of the tube body is integrally formed with a sealing convex ring which is recessed radially inward, the valve core has a cut-off position which forms a sealing contact with one side of the sealing convex ring and a conducting position which is out of contact with the sealing convex ring, and under the action of a fluid flowing from the sealing convex ring toward one side of the valve core, the valve core can be switched from the cut-off position to the conducting position.

[0005] In some embodiments, a side of the sealing convex ring close to the valve core is a conical surface, and when the valve core is in the cut-off position, the valve core contacts the conical surface to form the sealing contact.

[0006] In some embodiments, the sealing convex ring is formed by spinning the outer peripheral wall of the tube body toward the central axis of the tube body.

[0007] In some embodiments, the tube reduction ratio of spinning the tube body to form the sealing convex ring is no more than 41%.

[0008] In some embodiments, on the longitudinal section of the sealing convex ring, the sealing convex ring includes a straight line segment parallel to the central axis of the tube body and an oblique line segment corresponding to the conical surface, and the straight line segment and the oblique line segment are connected with each other in a smooth transition.

[0009] In some embodiments, on the longitudinal section of the sealing convex ring, the straight line segment includes two segments, and the two straight line segments are respectively located on both sides of the straight line segment and are symmetrical to each other.

[0010] In some embodiments, a limit ring is also formed on the inner wall of the tube body, the valve core is located in the interval between the sealing convex ring and the limit ring, and the limit ring is formed by spinning the outer peripheral wall of the tube body toward the central axis of the tube body.

[0011] In some embodiments, in the axial direction from the limiting ring to the sealing convex ring, the tube body includes a valve mouth section, a transition section, and a connecting section which are located on the side of the sealing convex ring away from the valve core and are connected in sequence, and the diameters of the valve mouth section, the transition section, and the connecting section are getting larger and larger.

[0012] In some embodiments, the valve port section, transition section, and connecting pipe section are all formed by spinning.

[0013] In some embodiments, both ends of the tube body are spun to form a connecting pipe section.

[0014] The one-way valve of the utility model forms a sealing fit between the sealing convex ring and the valve core by integrally molding the sealing convex ring on the inner wall of the tube body, thereby eliminating the need to separately assemble a corresponding valve seat in the tube body and eliminating the need to separately process the corresponding valve seat, thereby reducing the processing of parts, reducing material costs and processing and assembly costs, reducing assembly procedures, and improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram (longitudinal cross-sectional view) of a one-way valve of an embodiment of the utility model, in which the valve core is in a conducting position;

[0016] Figure 2 yes Figure 1 A schematic diagram of the structure in which the valve core of the one-way valve is in the cut-off position;

[0017] Figure 3 It is a structural schematic diagram of a one-way valve in another embodiment of the utility model.

[0018] In the figure:

[0019] 1. Pipe body; 11. Sealing convex ring; 12. Limiting ring; 13. Valve mouth section; 14. Transition section; 15. Pipe connecting section; 2. Valve core. DETAILED DESCRIPTION

[0020] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers are exaggerated for clarity. The same reference numerals in the drawings represent the same or similar structures, and thus their detailed description will be omitted.

[0021] The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present invention. However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be used. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present invention.

[0022] The following example is a one-way valve of the utility model. This example is only a part of the embodiments of the utility model, but the protection scope of the utility model is not limited to this. All other embodiments obtained by ordinary technicians in this field without creative work should be included in the protection scope of the utility model.

[0023] Please refer to Figures 1 to 3 As shown, according to an embodiment of the utility model, a one-way valve is provided, comprising a pipe body 1 and a valve core 2 slidably connected to the pipe body 1, a sealing convex ring 11 which is recessed radially inward is integrally formed on the inner wall of the pipe body 1, the valve core 2 has a cut-off position for forming a sealing contact with one side of the sealing convex ring 11 and a conducting position for breaking contact with the sealing convex ring 11, and a sealing convex ring 11 is formed on the inner wall of the pipe body ... Figure 1 Under the action of the fluid flowing (from left to right in the direction shown), the valve core 2 can be switched from the cut-off position to the conduction position. Conversely, under the action of the fluid flowing from the valve core 2 toward the side of the sealing convex ring 11, the valve core 2 is switched from the conduction position to the cut-off position, thereby realizing the unidirectional conduction function of the valve core 2.

[0024] In this technical solution, a sealing fit is formed between the sealing convex ring 11 and the valve core 2 by integrally molding the sealing convex ring 11 on the inner wall of the tube body 1, thereby eliminating the need to separately assemble a corresponding valve seat in the tube body 1 or to separately process the corresponding valve seat, thereby reducing the processing of parts, reducing material costs and processing and assembly costs, reducing assembly procedures, and improving assembly efficiency.

[0025] In a specific embodiment, the tube body 1 is made of a copper tube, and the valve core 2 is made of fluoroplastics.

[0026] See also Figure 1 and Figure 3As shown, in some embodiments, the side of the sealing convex ring 11 close to the valve core 2 is a conical surface. When the valve core 2 is in the truncated position, the valve core 2 contacts the conical surface to form the sealing contact. Specifically, the sealing convex ring 11 is formed by spinning the outer peripheral wall of the tube body 1 toward the central axis of the tube body 1.

[0027] The conical surface formed by spinning the tube body cooperates with the sealing surface of the valve core to seal, and the conical surface with relatively high conical surface accuracy in the tube body spinning process is used as the sealing surface instead of the arc surface adjacent to the conical surface, which has a higher sealing effect.

[0028] In some embodiments, the tube reduction ratio of the sealing convex ring 11 formed by spinning the tube body 1 is not greater than 41%. Limiting the reduction ratio can reduce the spinning stress and prevent the sealing performance from being excessively deteriorated. In a specific embodiment, the valve seat diameter, that is, the through hole diameter of the sealing convex ring 11, is 15.6 mm or 15.5 mm, and the inner diameter of the tube body 1 before spinning is 26.2 mm, then the reduction ratio is (26.2-15.6) / 26.2=40.5%.

[0029] In some embodiments, on the longitudinal section of the sealing convex ring 11, the sealing convex ring 11 includes a straight line segment parallel to the central axis of the tube body 1 and an oblique line segment corresponding to the conical surface. The straight line segment and the oblique line segment are smoothly connected to each other, which can reduce stress and prevent cracks.

[0030] See Figure 3 As shown, the sealing convex ring 11 shown therein is a conical surface facing the valve core 2, see Figure 1 As shown, as another feasible implementation, on the longitudinal section of the sealing convex ring 11, the straight line segment includes two segments, and the two straight line segments are respectively located on both sides of the straight line segment and are symmetrical to each other.

[0031] In some embodiments, a limit ring 12 is also formed on the inner wall of the tube body 1, the valve core 2 is located in the interval between the sealing convex ring 11 and the limit ring 12, and the limit ring 12 is formed by spinning the outer peripheral wall of the tube body 1 toward the central axis of the tube body 1.

[0032] By spinning the outer peripheral wall of the tube body 1 to form the limit ring 12, there is no need to separately provide a corresponding axial limit structure for the valve core 2, which further simplifies the structural design of the one-way valve.

[0033] See Figure 3As shown, in some embodiments, in the axial direction from the stop ring 12 to the sealing convex ring 11, the pipe body 1 includes a valve port section 13, a transition section 14, and a connecting pipe section 15, which are located on the side of the sealing convex ring 11 away from the valve core 2 and are connected in sequence, and the pipe diameters of the valve port section 13, the transition section 14, and the connecting pipe section 15 are getting larger and larger, so as to prevent the pipe body 1 from deforming and affecting the conical surface sealing when the connecting pipe is assembled. In a specific embodiment, the valve port section 13, the transition section 14, and the connecting pipe section 15 are all formed by spinning, and a section of the connecting pipe section 15 is formed by spinning at both ends of the pipe body 1.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A one-way valve, characterized in that: The invention comprises a tube body (1) and a valve core (2) slidably connected to the tube body (1); a sealing convex ring (11) which is recessed radially inward is integrally formed on the inner wall of the tube body (1); the valve core (2) has a cut-off position for forming a sealing contact with one side of the sealing convex ring (11) and a conducting position for breaking contact with the sealing convex ring (11); and under the action of a fluid flowing from the sealing convex ring (11) toward one side of the valve core (2), the valve core (2) can be switched from the cut-off position to the conducting position.

2. The one-way valve according to claim 1, characterized in that: The side of the sealing convex ring (11) close to the valve core (2) is a conical surface, and when the valve core (2) is in the cut-off position, the valve core (2) contacts the conical surface to form the sealing contact.

3. The one-way valve according to claim 2, characterized in that: The sealing convex ring (11) is formed by spinning the outer peripheral wall of the tube body (1) toward the central axis of the tube body (1).

4. The one-way valve according to claim 3, characterized in that: The tube diameter reduction ratio of the sealing convex ring (11) formed by spinning the tube body (1) is not greater than 41%.

5. The one-way valve according to claim 2, characterized in that: In the longitudinal section of the sealing convex ring (11), the sealing convex ring (11) comprises a straight line segment parallel to the central axis of the tube body (1) and an oblique line segment corresponding to the conical surface, and the straight line segment and the oblique line segment are connected with each other in a smooth transition.

6. The one-way valve according to claim 5, characterized in that: In the longitudinal section of the sealing convex ring (11), the straight line segment includes two segments, and the two straight line segments are respectively located on two sides of the straight line segment and are symmetrical to each other.

7. The one-way valve according to claim 1, characterized in that: A limiting ring (12) is also formed on the inner wall of the tube body (1), the valve core (2) is located in the interval between the sealing convex ring (11) and the limiting ring (12), and the limiting ring (12) is formed by spinning the outer peripheral wall of the tube body (1) toward the central axis of the tube body (1).

8. The one-way valve according to claim 7, characterized in that: In the axial direction from the limiting ring (12) to the sealing convex ring (11), the pipe body (1) comprises a valve opening section (13), a transition section (14), and a connecting section (15) which are located on the side of the sealing convex ring (11) away from the valve core (2) and are connected in sequence, and the pipe diameters of the valve opening section (13), the transition section (14), and the connecting section (15) are increasing.

9. The one-way valve according to claim 8, characterized in that: The valve port section (13), the transition section (14) and the connecting section (15) are all formed by spinning.

10. The one-way valve according to claim 9, characterized in that: Both ends of the tube body (1) are spun to form a connecting pipe section (15).

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