A one-way valve

Abstract

The utility model relates to one -way valve technical field especially relates to a one -way valve, include: valve body, the center is provided with through -hole, valve seat is installed in through -hole, the center is provided with flow -through hole, and flow -through hole is provided with through -hole coaxial arrangement, retainer, install in through -hole, abut valve seat, and the side of retainer near valve seat is provided with sliding space, spheroid, set up in sliding space, do linear reciprocating motion to the direction close to or away from valve seat, elastic component, set up in sliding space, one end abuts retainer, the other end abuts spheroid, limiting component, set up in through -hole, be located valve seat and the both sides of retainer, the utility model discloses effectively reduce the processing cost and the difficulty of one -way valve, flexible switching suction, and the mode of spitting, reduce the part kind, expand the use scene.

Description

Technical Field

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

[0002] One-way valves are a fundamental and critical component in fluid transmission and control systems. Their core function is to allow fluids to flow freely in one direction, such as hydraulic oil and gas, while preventing fluids from flowing in the opposite direction. This one-way shut-off characteristic makes them indispensable in scenarios such as maintaining system pressure, preventing backflow of media, and protecting core components, such as in pump and compressor systems.

[0003] In fluid systems, two types of check valves with opposite functions are often required. One type is a suction check valve installed at the inlet of a pump or cavity to prevent backflow of the medium and keep the inlet full. The other type is a discharge check valve installed at the outlet of a pump or actuator to prevent backflow of the medium caused by load pressure. Since the functional requirements for the valve seat position and the direction of spring action are fixed and different, the internal parts of these two types of valves take two forms, resulting in two different valve bodies and internal components. The overall required parts are diverse, and there are situations where the parts are difficult to process, which further increases the cost.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] This utility model provides a one-way valve that integrates a valve core guide, spring, and fluid channel retainer. By changing the axial position of the retainer and valve seat within the valve body, the same valve body can switch between two working modes: suction port and discharge port, significantly reducing the types of parts and processing costs.

[0006] This utility model provides a one-way valve, comprising: The valve body has a through hole in the center; A valve seat is installed inside the through hole, with a flow hole in the center, and the flow hole is coaxially arranged with the through hole; A retainer is installed in the through hole and abuts against the valve seat; the retainer has a sliding space on the side near the valve seat. A spherical body is disposed within the sliding space and reciprocates in a straight line in the direction of approaching or moving away from the valve seat; An elastic component is disposed within the sliding space, with one end abutting against the retainer and the other end abutting against the spherical body; A limiting component is disposed within the through hole, located on both sides of the valve seat and the retainer.

[0007] Furthermore, a plurality of flow grooves are formed at one end of the retainer that abuts against the valve seat. The flow grooves are arranged along the length direction of the retainer and connect the through hole and the flow hole.

[0008] Furthermore, the plurality of flow grooves are evenly spaced along the axial direction of the retainer.

[0009] Furthermore, the limiting component includes a slot and a retaining spring. The slot is formed in the valve body, and the retaining spring is disposed in the slot, abutting against the valve seat or the retainer.

[0010] Furthermore, the limiting component also includes a limiting strip, which is arranged axially within the valve body. The limiting strip abuts against the valve seat or the retainer. The limiting strip and the snap ring are arranged sequentially along the length of the valve body.

[0011] Furthermore, a sealing groove is formed on the outer wall of the valve seat, and a first sealing ring is provided in the sealing groove.

[0012] Furthermore, a second sealing ring is provided on the outer wall of the valve body.

[0013] Furthermore, the elastic component includes a spring, one end of which abuts against the retainer and the other end against the sphere.

[0014] Furthermore, the one-way valve includes two working modes: a suction mode and a discharge mode. The suction mode and the discharge mode are switched according to the installation position of the valve seat and the retainer. The limiting component includes a first limiting member and a second limiting member, which are respectively disposed on one side of the valve seat and the retainer.

[0015] Furthermore, switching between the two operating modes includes: In the suction port mode, the first limiting member, the valve seat, the ball, the retainer, and the second limiting member are sequentially arranged in the through hole along the length direction of the valve body, and fluid flows into the through hole from the end near the first limiting member; In the discharge mode, the first limiting member, the retainer, the spherical body, the valve seat, and the second limiting member are sequentially arranged in the through hole along the length direction of the valve body, and fluid flows into the through hole from the end near the second limiting member.

[0016] The following technical effects can be achieved through the technical solution of this utility model: This technology solves the problem of producing and storing two independent check valves due to fixed functional directions in existing technologies. It reduces the types of parts, lowers production and management costs and reduces user inventory pressure, and improves the product's versatility and application flexibility. The required functional direction can be quickly configured according to on-site needs. Core structural parts such as steel balls, standard springs, and snap rings are all readily available general-purpose parts, and the internal structure of the valve body is symmetrical and simple, further reducing processing and assembly costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the one-way valve in an embodiment of the present invention; Figure 2 This is a side view of the one-way valve in the suction port mode in an embodiment of this utility model; Figure 3 for Figure 2 Sectional view at point AA; Figure 4 This is a schematic diagram of the cage structure in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the cage, the ball, and the spring in an embodiment of this utility model; Figure 6 This is a side view of the one-way valve in the discharge mode according to an embodiment of this utility model; Figure 7 for Figure 6 Sectional view at point BB.

[0019] Reference numerals: 1. Valve body; 11. Through hole; 12. Second sealing ring; 2. Valve seat; 21. Flow hole; 22. Sealing groove; 23. First sealing ring; 3. Cage; 31. Sliding space; 32. Flow groove; 4. Spherical body; 5. Elastic component; 51. Spring; 6. Limiting component; 61. Snap groove; 62. Snap ring; 63. Limiting strip; 64. First limiting element; 65. Second limiting element. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] This utility model provides a method such as Figures 1 to 7 The one-way valve shown includes: The valve body 1 has a through hole 11 in the center, which is a basic support component. It is a hollow cylindrical structure. The through hole 11 serves as the main flow channel of the entire one-way valve and is also a chamber that accommodates all other internal parts. The valve body 1 has standard interfaces such as threads and flanges at both ends for connecting to external pipelines.

[0023] Valve seat 2 is installed inside the through hole 11, with a flow hole 21 in the center, and the flow hole 21 is coaxial with the through hole 11; The retainer 3 is installed in the through hole 11 and abuts against the valve seat 2. A sliding space 31 is provided on the side of the retainer 3 near the valve seat 2. The spherical body 4 is disposed in the sliding space 31 and moves in a straight reciprocating motion toward or away from the valve seat 2. The elastic component 5 is disposed in the sliding space 31, with one end abutting against the retainer 3 and the other end abutting against the spherical body 4; The limiting component 6 is installed inside the through hole 11, located on both sides of the valve seat 2 and the retainer 3, to limit the position of the valve seat 2 and the retainer 3, to prevent them from shifting within the valve body 1 due to fluid, and to ensure the stability and reliability of the overall function.

[0024] The specific working principle of this utility model is as follows: When no fluid flows in, the spherical body 4 forms a seal by elastically abutting the flow hole 21 of the valve seat 2 due to the elasticity of the elastic component 5, and the flow hole 21 is not open. When fluid flows in from the through hole 11 on the side close to the valve seat 2, the fluid pressure acts on the spherical body 4 abutting the valve seat 2. When the fluid pressure is greater than the elastic potential energy, the spherical body 4 is pushed by the fluid to compress the elastic component 5 and rolls away from the valve seat 2 along the sliding space 31 in the cage 3. The flow hole 21 is opened. At this time, the fluid flows through the through hole 11, the flow hole 21, and then through the space left by the spherical body 4 and the sliding space 31 provided by the cage 3, or through the gap between the sliding space 31 and the valve body 1 or the flow structure of the cage 3 itself, to reach the other side of the valve body 1 and flow out.

[0025] When the pressure at the inflow end decreases or the pressure at the opposite end increases, the spherical body 4, under the action of the elastic force and pressure difference of the elastic component 5, moves back to its original position along the sliding space 31 and finally fits tightly against the sealing end face of the valve seat 2, blocking the reverse flow of fluid.

[0026] Based on the above embodiments, by simply swapping the relative positions of the valve seat 2, the retainer 3, the ball 4, and the elastic component 5 in the limiting component 6, the fluid can flow in from two directions to push open the ball 4 for flow while the valve body 1 remains unchanged. This achieves the effect of corresponding to the two one-way valve working modes of the suction port and the discharge port, and also corresponds to the one-way valves required at both ends of the pump's fluid inlet and outlet.

[0027] In some embodiments of this utility model, such as Figure 4 and Figure 5 As shown, a plurality of flow grooves 32 are formed at one end of the retainer 3 that abuts against the valve seat 2. The flow grooves 32 are arranged along the length of the retainer 3 and connect the through hole 11 and the flow hole 21. The cross-sectional shape of the flow grooves 32 can be rectangular, trapezoidal, arc-shaped or a combination of various shapes. When the fluid pressure overcomes the elastic force and pushes the spherical body 4, the main fluid stream is ejected from the flow hole 21 of the valve seat 2 and then impacts the end face of the retainer 3. At this time, the flow grooves 32 provide a low-resistance channel, and the fluid quickly flows into each flow groove 32 and flows along the length of the flow grooves 32, guiding and diffusing the concentrated fluid into the sliding space 31 of the retainer 3. Finally, the fluid flows to the other side of the valve body 1. By forming the flow grooves 32, the fluid flow rate is increased, the flow capacity of the sliding space 31 is improved, and the response speed of the valve body 1 is increased.

[0028] Based on the above embodiments, such as Figure 4 and Figure 5 As shown, multiple flow channels 32 are evenly spaced along the axial direction of the retainer 3. The flow channels 32 are preferably evenly spaced along the circumferential direction of the end face of the retainer 3. For example, three, four or six channels can be processed to ensure the symmetry and stability of the fluid distribution, which helps to maintain the stability of the linear motion of the sphere 4 and reduce vibration and noise.

[0029] In some embodiments of this utility model, such as Figure 7As shown, the limiting component 6 includes a retaining groove 61 and a retaining spring 62. The retaining groove 61 is formed on the inner wall of the through hole 11 of the valve body 1. The cross-section of the retaining groove 61 can be rectangular or trapezoidal. The retaining spring 62 is set in the retaining groove 61. The retaining spring 62 abuts against the valve seat 2 or the retainer 3. The retaining spring 62 can be a standard hole-type elastic retaining ring, i.e., a hole-type retaining spring 62. The outer diameter of the retaining spring 62 is slightly larger than the diameter of the bottom of the retaining groove 61 of the valve body 1. Its own elasticity allows it to be compressed and installed into the through hole 11 of the valve body 1 and locked into the retaining groove 61. The inner hole of the retaining spring 62 forms an axial constraint surface for the internal parts. The installation and removal of the retaining spring 62 can be completed with only a simple tool, retaining spring 62 pliers, without the need for thread tightening or complicated pressing operations. This makes the removal and replacement of the valve seat 2 and the retainer 3, or the sequential exchange of the valve seat 2 and the retainer 3, simple and quick.

[0030] Based on the above embodiments, such as Figure 7 As shown, the limiting assembly 6 also includes a limiting strip 63, which is axially arranged inside the valve body 1. The limiting strip 63 abuts against the valve seat 2 or the retainer 3. The limiting strip 63 and the snap ring 62 are arranged sequentially along the length of the valve body 1. The limiting strip 63 acts as a fixed, immovable reference limiting surface, while the snap ring 62 acts as a detachable, movable limiting surface. The movement of the valve seat 2 and the retainer 3 is restricted from two directions. The limiting strip 63 also provides a reference positioning for the initial installation of the valve seat 2 or the retainer 3. During assembly, there is no need to measure the depth. Simply push the valve seat 2 or the retainer 3 in until it abuts against the limiting strip 63, which reduces the assembly difficulty.

[0031] In some embodiments of this utility model, such as Figure 3 As shown, a sealing groove 22 is formed on the outer wall of the valve seat 2, and a first sealing ring 23 is provided in the sealing groove 22. The first sealing ring 23 abuts against the valve body 1, and the inner hole of the valve body 1 exerts radial pressure on the sealing ring, causing the first sealing ring 23 to undergo elastic deformation and fill the gap between the sealing groove 22 and the inner wall of the valve body 1. No matter which side of the fluid pressure is higher, the compressed first sealing ring 23 can effectively block the fluid from passing through the sealing groove 22, thus achieving a static seal between the valve seat 2 and the valve body 1.

[0032] In some embodiments of this utility model, such as Figure 7As shown, a second sealing ring 12 is provided on the outer wall of the valve body 1. This sealing ring can be located near the connecting threads on the outer wall of the valve body 1. For example, one or more annular second sealing rings 12 can be provided at the root of the external threads at both ends of the valve body 1. Alternatively, if the valve body 1 uses a flange connection, it can be located on the flange end face. When the check valve is installed at an interface of an external system, such as a pump port, a threaded hole in a connector, or a flange face, the second sealing ring 12 is compressed to form a continuous, leak-free sealing band, achieving a flexible and reliable seal between the check valve and the external system. This makes the check valve a self-contained, fully functional, and reliably sealing product.

[0033] In some embodiments of this utility model, such as Figure 3 and Figure 5 As shown, the elastic component 5 includes a spring 51, one end of which abuts against the retainer 3 and the other end against the spherical body 4. The spring 51 is preferably a cylindrical helical compression spring 51, which can provide stable preload and reset force, ensuring the reliability of the spherical body 4 sealing the valve seat 2 and the consistency of the opening pressure, and greatly improving the performance stability of the check valve.

[0034] In some embodiments of this utility model, such as Figure 3 and Figure 7 As shown, the one-way valve has two working modes: suction mode and discharge mode. The suction mode and discharge mode are switched according to the installation position of valve seat 2 and retainer 3. The limiting component 6 includes a first limiting member 64 and a second limiting member 65, which are respectively disposed on one side of valve seat 2 and retainer 3.

[0035] In this embodiment, the through hole 11 of the valve body 1 is set as a simple straight through hole, without any immutable special steps used to uniquely determine the position of a certain part. The first limiting member 64 and the second limiting member 65 are two mechanical structures that can form axial constraints within the through hole 11, and are arranged opposite each other along the axial direction of the valve body 1. The valve seat 2 and the retainer 3 are two core functional structures, which are accommodated and fixed between the first limiting member 64 and the second limiting member 65. The first limiting member 64 can be a limiting strip 63, and the second limiting member 65 can be a combination of a retaining spring 62 and a retaining groove 61.

[0036] Since the flow direction of valve seat 2 and retainer 3 is fixed, the fluid can only continue to flow smoothly by flowing into the valve seat 2 and pushing the ball 4 to move along the sliding space 31 of retainer 3. Therefore, as long as the valve seat 2 and retainer 3 are interchanged relative to the valve body 1, different working modes are changed, forming one-way valves with different flow directions.

[0037] Based on the above embodiments, with the valve body 1 interface remaining unchanged, two operating modes are switched, including: Suction mode, such as Figure 2 and Figure 3As shown, the first limiting member 64, valve seat 2, ball 4, retainer 3 and second limiting member 65 are sequentially arranged in the through hole 11 along the length direction of the valve body 1, and the fluid flows into the through hole 11 from the end near the first limiting member 64. Spouting mode, such as Figure 6 and Figure 7 As shown, the first limiting member 64, the retainer 3, the ball 4, the valve seat 2, and the second limiting member 65 are sequentially arranged in the through hole 11 along the length direction of the valve body 1, and the fluid flows into the through hole 11 from the end near the second limiting member 65.

[0038] When the check valve is intended to be used as a suction valve to prevent backflow of the pump or container inlet medium, i.e., suction mode, the first limiting member 64 is used as a reference, such as the limiting step inside the valve body 1 or the pre-installed limiting strip 63. Next, the valve seat 2 is inserted into the through hole 11, so that one end of the valve seat 2 abuts against the first limiting member 64. Then, the ball 4 is inserted and placed on the sealing end face of the valve seat 2, i.e., the sealing flow hole 21. After that, the retainer 3 with the built-in elastic component 5 is inserted, so that the retainer 3 abuts against the ball 4. Finally, the second limiting member 65, such as the snap ring 62, is inserted and locked, so that the snap ring 62 axially presses the retainer 3. Thus, the fluid flows into the through hole 11 from the end near the first limiting member 64, and the fluid pressure acts directly on the ball 4 at the flow hole 21 of the valve seat 2. After overcoming the force of the spring 51 to push the ball 4 away, the fluid flows through the hole of the valve seat 2 and the retainer 3, and finally flows out from the end near the second limiting member 65, while the reverse flow is stopped.

[0039] When a one-way valve is required as a discharge valve to prevent backflow of the medium due to load pressure, with the first limiting member 64 as a reference, first insert the retainer 3 containing the built-in elastic component 5 and the ball 4 into the through hole 11, so that the retainer 3 abuts against the first limiting member 64; then, insert the valve seat 2 to abut against the ball 4; finally, insert the second limiting member 65 to press the valve seat 2. The fluid flows into the through hole 11 from the end near the second limiting member 65. The fluid first acts on the ball 4 in the retainer 3, pushing the ball 4 away from the valve seat 2. Then the fluid flows through the retainer 3 and the flow hole 21 of the valve seat 2, and finally flows out from the end near the first limiting member 64. The reverse flow is also blocked.

[0040] This embodiment achieves the functions of two check valves through a set of universal valve seat 2, ball 4, elastic component 5 and retainer 3, reducing the configuration of parts and production costs. All parts can use universal models, making processing more convenient. Of course, the size and specifications of the check valve can also be specially processed for special application environments, making the check valve a flexible and independent product that can be configured according to user needs.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A one-way valve, characterized in that, include: Valve body (1), with a through hole (11) in the center; A valve seat (2) is installed in the through hole (11) and a flow hole (21) is opened in the center. The flow hole (21) is coaxially arranged with the through hole (11). A retainer (3) is installed in the through hole (11) and abuts against the valve seat (2). A sliding space (31) is provided on the side of the retainer (3) near the valve seat (2). A spherical body (4) is disposed in the sliding space (31) and moves in a straight line reciprocating motion in the direction of approaching or moving away from the valve seat (2); An elastic component (5) is disposed within the sliding space (31), with one end abutting against the retainer (3) and the other end abutting against the spherical body (4); The limiting component (6) is disposed in the through hole (11) and located on both sides of the valve seat (2) and the retainer (3).

2. The one-way valve according to claim 1, characterized in that, The retainer (3) has a plurality of flow grooves (32) at one end that abuts against the valve seat (2). The flow grooves (32) are arranged along the length of the retainer (3) and the flow grooves (32) connect the through hole (11) and the flow hole (21).

3. The one-way valve according to claim 2, characterized in that, The plurality of flow grooves (32) are evenly spaced along the axial direction of the retainer (3).

4. The one-way valve according to claim 1, characterized in that, The limiting component (6) includes a slot (61) and a retaining spring (62). The slot (61) is formed in the valve body (1), and the retaining spring (62) is disposed in the slot (61). The retaining spring (62) abuts against the valve seat (2) or the retainer (3).

5. The one-way valve according to claim 4, characterized in that, The limiting component (6) further includes a limiting strip (63), which is arranged axially within the valve body (1) along the valve body (1). The limiting strip (63) abuts against the valve seat (2) or the retainer (3). The limiting strip (63) and the snap ring (62) are arranged sequentially along the length direction of the valve body (1).

6. The one-way valve according to claim 1, characterized in that, A sealing groove (22) is provided on the outer wall of the valve seat (2), and a first sealing ring (23) is provided in the sealing groove (22).

7. The one-way valve according to claim 1, characterized in that, A second sealing ring (12) is provided on the outer wall of the valve body (1).

8. The one-way valve according to claim 1, characterized in that, The elastic component (5) includes a spring (51), one end of which abuts against the retainer (3) and the other end of which abuts against the sphere (4).

9. The check valve according to any one of claims 1 to 8, characterized in that, The one-way valve has two working modes: suction mode and discharge mode. The suction mode and discharge mode are switched according to the installation position of the valve seat (2) and the retainer (3). The limiting component (6) includes a first limiting member (64) and a second limiting member (65), which are respectively disposed on one side of the valve seat (2) and the retainer (3).

10. The one-way valve according to claim 9, characterized in that, When the one-way valve is in suction mode, the first limiting member (64), the valve seat (2), the ball (4), the retainer (3) and the second limiting member (65) are sequentially arranged in the through hole (11) along the length direction of the valve body (1), and the fluid flows into the through hole (11) from the end near the first limiting member (64); When the one-way valve is in the discharge mode, the first limiting member (64), the retainer (3), the ball (4), the valve seat (2) and the second limiting member (65) are sequentially arranged in the through hole (11) along the length direction of the valve body (1), and the fluid flows into the through hole (11) from the end near the second limiting member (65).

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