Double-seal one-way valve and vehicle

Abstract

The one-way valve comprises a valve seat, a valve rod and a sealing ring, an opening is formed in the valve seat and comprises a small-caliber part and a large-caliber part which are communicated with each other, the small-caliber part comprises a conical opening, the large-caliber end of the conical opening faces the large-caliber part, and the large-caliber end of the conical opening faces the large-caliber part. A step surface is formed between the large-diameter part and the large-diameter part; the valve rod comprises a rod part, a shoulder part and a head part which are integrally connected in sequence, and the head part is of a conical structure capable of forming hard sealing with the conical opening; and the shoulder part and the step surface can be sealed through the sealing ring.

Description

Technical Field

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

[0002] In the automotive industry, fluid reservoirs are connected to hydraulic systems via check valves. These check valves provide fluid inflow and a sealing function to the hydraulic system. A check valve consists of a valve seat, a valve stem, and a spring. The valve seat has an inlet that connects to the outlet of the fluid reservoir. The valve stem is spring-loaded and positioned within the inlet channel of the hydraulic system. The top of the valve stem has a conical tip that matches the conical inlet. This check valve employs a double seal: first, the conical tip extends into the conical inlet, and its outer circumference seals against the conical surface of the inlet; second, a sealing ring is embedded at the lower outer circumference of the conical tip, and the seal is achieved through contact between the side of the sealing ring and the conical surface of the inlet. However, this double-seal structure has the following drawbacks:

[0003] 1. The parting line of the sealing ring is on the side, and the sealing contact surface is also on the side. Therefore, due to the presence of the parting line, the roundness of the sealing ring deteriorates after assembly, affecting the seal.

[0004] 2. The sealing ring rubs against the conical surface as it moves with the valve stem, and wear will occur after a period of time, affecting the seal;

[0005] 3. Because the mating surfaces of the valve seat and valve stem are conical, the side of the sealing ring is squeezed by the conical surface of the valve seat during the movement of the valve stem. As a result, the space around the sealing ring will become smaller, the sealing ring will deform in a complex way, and there is a risk of it being squeezed and broken. Utility Model Content

[0006] To solve the above-mentioned technical problems, one embodiment of this utility model provides a double-sealed one-way valve, including a valve seat, a valve stem, and a sealing ring. The valve seat has an opening, which includes a small-diameter portion and a large-diameter portion that are connected to each other. The small-diameter portion includes a tapered opening, with the large-diameter end of the tapered opening facing the large-diameter portion and forming a stepped surface between the tapered opening and the large-diameter portion. The valve stem includes a rod portion, a shoulder portion, and a head portion that are integrally connected in sequence. The head portion is a tapered structure that can form a hard seal with the tapered opening. The shoulder portion and the stepped surface can be sealed by the sealing ring.

[0007] Optionally, the diameter of the small end of the conical structure is larger than the small diameter of the conical opening and smaller than the large diameter of the conical opening; the diameter of the large end of the conical structure is larger than the large diameter of the conical opening.

[0008] Optionally, the outer diameter of the shoulder is smaller than the diameter of the large-diameter portion, but larger than the diameter of the large end of the tapered structure.

[0009] Optionally, a neck is provided between the head and the shoulder, the outer diameter of the neck being larger than the diameter of the large end of the conical structure and smaller than the outer diameter of the shoulder; the sealing ring is disposed on the groove formed between the neck and the shoulder, and in its natural state, the height of the sealing ring is higher than the height of the neck.

[0010] Optionally, the conical opening is a conical cylindrical opening, and the conical structure is a conical cylinder.

[0011] Another embodiment of this utility model provides a vehicle, including a liquid storage tank and a hydraulic system, wherein the outlet of the liquid storage tank and the inlet of the hydraulic system are connected by a one-way valve as described in the above embodiment.

[0012] Optionally, the inlet end is provided with an installation groove and an inlet, and the stem of the valve stem is elastically disposed in the installation groove by an outer spring; the valve seat is fixedly disposed at the opening of the installation groove; the inlet is connected to the side of the installation groove.

[0013] When there is no internal pressure or the pressure in the hydraulic system is relatively low, the shoulder and the stepped surface are sealed by the sealing ring.

[0014] When the internal pressure of the hydraulic system is relatively high, the valve stem pushes and compresses the sealing ring by the internal pressure of the hydraulic system, so that the head and the conical opening form a hard seal.

[0015] When the hydraulic system needs to be filled with liquid, the valve stem is pushed away from the valve seat by the liquid in the reservoir and the negative pressure inside the hydraulic system, and the opening communicates with the liquid inlet through the mounting groove.

[0016] Compared with the prior art, the technical solution of this utility model embodiment has the following beneficial effects:

[0017] 1. The parting line of the sealing ring is on the side, and the sealing contact surface is on the bottom surface (when sealing, the opposite surfaces of the shoulder and the step surface are both flat, and the shoulder and the step surface are sealed by the sealing ring, that is, one bottom surface of the sealing ring contacts the shoulder for sealing, and the other bottom surface contacts the step surface for sealing. The side of the sealing ring does not contact the shoulder and the step surface. Therefore, the bottom surface of the sealing ring is the sealing contact surface). So the parting line of the sealing ring will not affect the sealing.

[0018] 2. As the sealing ring moves with the valve stem, it will only be compressed and will not rub against other structures. Therefore, the sealing ring has almost no wear and is more durable, thus ensuring the sealing effect.

[0019] 3. During the movement of the valve stem and the sealing ring, the side of the sealing ring will not be squeezed by the conical surface of the valve seat. Therefore, the surrounding space of the sealing ring is always large enough, and the sealing ring will not be at risk of being squeezed and ruptured. Attached Figure Description

[0020] 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 of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a one-way valve provided in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of a liquid storage tank connected to the inlet end of a hydraulic system via a one-way valve, according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of a single-seal check valve provided in an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the double-sealed one-way valve structure provided in an embodiment of the present invention;

[0025] Figure 5 A structural diagram of the one-way valve during fluid inlet in a hydraulic system provided in an embodiment of this utility model; Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. The terms "above" and "over," and any variations thereof, are intended to describe positional relationships and do not imply direct contact between the described objects.

[0028] Please refer to Figure 1 An embodiment of this utility model provides a double-sealed one-way valve 1, including a valve seat 11, a valve stem 13, and a sealing ring 12. The valve seat 11 has an opening, which includes a small-diameter portion and a large-diameter portion 113 that are connected to each other. The small-diameter portion includes a conical opening 111, with the large-diameter end of the conical opening 111 facing the large-diameter portion 113 and forming a stepped surface 112 between it and the large-diameter portion 113. The valve stem 13 includes a rod portion 134, a shoulder portion 133, and a head portion 131 that are integrally connected in sequence. The head portion 131 is a conical structure that can form a hard seal with the conical opening 111. The shoulder portion 133 and the stepped surface 112 can be sealed by the sealing ring 12.

[0029] The one-way valve provided in this embodiment can achieve a double sealing effect. The shoulder 133 and the stepped surface 112 achieve a first sealing through the sealing ring 11. As the valve stem 13 gradually approaches the valve seat 11, the tapered structure of the valve stem 13 continues to approach the small diameter of the tapered opening 111, so that the head 131 and the tapered opening 111 form a hard seal, thereby forming a double seal between the valve stem 13 and the valve seat 11.

[0030] In order to enable the tapered structure of the valve stem 13 to form a hard seal with the tapered port 111, in this embodiment, the outer diameter of the small end of the tapered structure is larger than the small diameter of the tapered port 111 and smaller than the large diameter of the tapered port 111; the outer diameter of the large end of the tapered structure is larger than the large diameter of the tapered port 111.

[0031] In order to ensure that the shoulder 133 and the step surface 112 are sealed by the sealing ring 12, it is necessary to ensure that the shoulder 133 and the step surface 112 have overlapping portions. Therefore, in this embodiment, the outer diameter of the shoulder 133 is smaller than the diameter of the large diameter portion 113 and larger than the large diameter of the conical opening 111. This ensures that the shoulder 133 and the step surface 112 have overlapping portions, which facilitates sealing by the sealing ring 12 at the overlapping portion of the shoulder 133 and the step surface 112, so that one bottom surface of the sealing ring 12 contacts and seals the shoulder 133, and the other bottom surface contacts and seals the step surface 112.

[0032] Since the parting line of the sealing ring 12 is located on the side of the sealing ring 12, and the bottom surface of the sealing ring 12 is the sealing contact surface (when sealing, the opposite surfaces of the shoulder 133 and the step surface 112 are both planes, and the shoulder 133 and the step surface 112 are sealed by the sealing ring 12, that is, one bottom surface of the sealing ring 12 contacts and seals with the shoulder 133, and the other bottom surface contacts and seals with the step surface 112. The side of the sealing ring does not contact the shoulder and the step surface. Therefore, the bottom surface of the sealing ring 12 is the sealing contact surface), the parting line of the sealing ring 12 will not affect the sealing.

[0033] To further achieve a sealing effect, the shoulder 133 is set parallel to the opposite surface of the step surface 112.

[0034] As the sealing ring 12 moves closer to the valve seat 11 along with the valve stem 13, it will only be compressed and will not rub against other structures. Therefore, the sealing ring 12 has almost no wear and is more durable, thus ensuring the sealing effect.

[0035] As the valve stem 13 moves closer to the valve seat 11, the sealing ring 12 continues to be compressed. However, there is always a gap between the side of the sealing ring 12 and the inner side of the valve seat 11. Therefore, during the movement of the sealing ring 12 driven by the valve stem 13, the space around the sealing ring 12 is always large enough, and the sealing ring 12 will not be at risk of being squeezed and ruptured.

[0036] To facilitate the installation of the sealing ring 12, in this embodiment, a neck 132 is provided between the head 131 and the shoulder 133. The outer diameter of the neck 132 is larger than the outer diameter of the large end of the head 131 and smaller than the outer diameter of the shoulder 133. The sealing ring 12 is disposed on the groove formed between the neck 132 and the shoulder 133. In its natural state, the height of the sealing ring 12 is higher than the height of the neck 132, so that the sealing ring 12 can contact both the shoulder 133 and the stepped surface 112.

[0037] To facilitate fitting of the sealing ring 12, a rounded corner is provided at the connection between the shoulder 133 and the neck 132.

[0038] This embodiment does not limit the type of sealing ring 12, such as an O-ring.

[0039] To facilitate the formation of a hard seal between the conical opening 111 and the conical structure of the valve stem 13, the conical opening 111 is a conical cylindrical opening, and the conical structure is a conical cylinder. The conical surface of the conical cylinder directly contacts the conical surface of the conical opening 111 to form a hard seal.

[0040] This embodiment does not specifically limit the application field of the aforementioned one-way valve 1. As one embodiment, the aforementioned one-way valve 1 can be used in the automotive field; that is, another embodiment of this utility model provides a vehicle, please refer to... Figure 2 The vehicle includes a liquid storage tank 2 and a hydraulic system, wherein the liquid storage tank 2 and the liquid inlet 3 of the hydraulic system are connected by the aforementioned one-way valve 1.

[0041] The inlet end 3 is provided with an installation groove 31 and an inlet 32. The rod portion 134 of the valve stem 13 is elastically disposed in the installation groove 31 by an outer spring 134. The valve seat 11 is fixedly disposed at the opening of the installation groove 31. The inlet 32 ​​is connected to the side of the installation groove 31. The outlet 21 of the storage tank 2 is connected to the opening of the valve seat 11.

[0042] When there is no internal pressure or the pressure is relatively low in the hydraulic system, the shoulder 133 and the stepped surface 112 are sealed by the sealing ring 12.

[0043] When the internal pressure of the hydraulic system is relatively high, the valve stem 13 pushes and compresses the sealing ring 12 by the internal pressure of the hydraulic system. That is, the conical structure of the valve stem 13 continues to move closer to the small diameter of the conical opening 111, so that the head 131 and the conical opening 111 form a hard seal, and then the valve stem 13 and the valve seat 11 form a double seal.

[0044] When the one-way valve 1 is in the sealing stage, in order to prevent the liquid in the reservoir 2 from flowing into the hydraulic system from the gap between the valve seat 11 and the groove wall of the mounting groove 31, this embodiment uses a sealing structure 4 to seal between the outer wall or end of the valve seat 11, the groove wall or end of the mounting groove 31, and the outlet 21 of the reservoir 2. This sealing structure 4 can be a sealing ring or other sealing structure.

[0045] When the hydraulic system needs to be filled with liquid, the valve stem 13 is pushed away from the valve seat 11 by the liquid in the reservoir 2 and the negative pressure inside the hydraulic system. This causes the head 131 to separate from the conical surface of the conical opening 111, meaning that the head 131 does not contact the conical surface of the conical opening 111. The sealing ring 12 also separates from the stepped surface 112, meaning that the sealing ring 12 does not contact the stepped surface 112. As a result, a gap is formed between the valve stem 13 and the valve seat 11, which allows liquid to flow. This gap is connected to the opening and the mounting groove 31, respectively. Then, the liquid in the reservoir 2 can flow into the hydraulic system sequentially from the gap between the valve stem 13 and the valve seat 11, the mounting groove 31, and the inlet 32.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A double-sealed one-way valve, comprising a valve seat, a valve stem, and a sealing ring, characterized in that, The valve seat has an opening, which includes a small-diameter portion and a large-diameter portion that are connected to each other. The small-diameter portion includes a tapered opening, with the large-diameter end of the tapered opening facing the large-diameter portion and forming a stepped surface between them. The valve stem includes a stem portion, a shoulder portion, and a head portion that are integrally connected in sequence. The head portion is a tapered structure that can form a hard seal with the tapered opening. The shoulder portion and the stepped surface can be sealed by the sealing ring.

2. The one-way valve according to claim 1, characterized in that, The diameter of the small end of the conical structure is greater than the small diameter of the conical opening and less than the large diameter of the conical opening; the diameter of the large end of the conical structure is greater than the large diameter of the conical opening.

3. The one-way valve according to claim 2, characterized in that, The outer diameter of the shoulder is smaller than the diameter of the large-diameter portion, but larger than the diameter of the large end of the tapered structure.

4. The one-way valve according to claim 3, characterized in that, A neck is provided between the head and the shoulder. The outer diameter of the neck is larger than the diameter of the large end of the conical structure and smaller than the outer diameter of the shoulder. The sealing ring is disposed on the groove formed between the neck and the shoulder. In its natural state, the height of the sealing ring is higher than the height of the neck.

5. The one-way valve according to claim 1, characterized in that, The conical opening is a conical cylindrical opening, and the conical structure is a conical cylinder.

6. A vehicle, characterized in that, It includes a liquid storage tank and a hydraulic system, wherein the outlet of the liquid storage tank is connected to the inlet of the hydraulic system via a one-way valve as described in any one of claims 1 to 5.

7. The vehicle according to claim 6, characterized in that, The inlet end is provided with an installation groove and an inlet. The stem of the valve stem is elastically set in the installation groove by an outer spring. The valve seat is fixedly set in the groove opening of the installation groove. The inlet is connected to the side of the installation groove. When there is no internal pressure or the pressure in the hydraulic system is relatively low, the shoulder and the stepped surface are sealed by the sealing ring. When the internal pressure of the hydraulic system is relatively high, the valve stem pushes and compresses the sealing ring by the internal pressure of the hydraulic system, so that the head and the conical opening form a hard seal. When the hydraulic system needs to be filled with liquid, the valve stem is pushed away from the valve seat by the liquid in the reservoir and the negative pressure inside the hydraulic system, and the opening communicates with the liquid inlet through the mounting groove.

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