One-way valve

Abstract

The invention discloses a one-way valve, and relates to the technical field of fluid control. In the one-way valve, a valve body channel is formed in a valve body, a valve seat is fixedly connected to an inlet of the valve body channel, a valve seat channel is formed in the valve seat, a hemispherical valve seat sealing face facing the valve body channel is arranged at the outlet end of the valve seat channel, a sealing ring is arranged on the valve seat sealing face, and a sealing ball is arranged in the valve body channel and can freely move in a limited space. The sealing ball can form soft sealing by pressing the sealing ring and can form hard sealing after being attached to and pressing the sealing face of the valve seat, and after the sealing ball is separated from the sealing ring and the sealing face of the valve seat, the valve seat channel can be communicated with the valve body channel. According to the one-way valve, the sealing ball can be tightly pressed on the sealing ring and / or the sealing face of the valve seat, soft and hard combined sealing is achieved, the reverse low-pressure sealing performance of the one-way valve is greatly improved, and the one-way valve adapts to more working conditions; the sealing position of the sealing ball can be adaptively adjusted, so that abrasion caused by fixation and concentration of the sealing position is avoided, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control, and in particular to a one-way valve. Background Art

[0002] The source of high-pressure fluid operation is the high-pressure fluid formed by the boosted output of low-pressure fluid that is easy to produce, store and transport. To achieve low-pressure input and high-pressure output of fluid, the fluid must be compressed and pressurized and the reverse flow of the fluid must be cut off. Therefore, in the fluid control boosting system, the one-way valve plays the role of forward fluid conduction and reverse fluid cutoff, so that the pressure of the low-pressure fluid continues to increase under the action of the compression force. As a key component of the fluid control boosting system, the reverse low-pressure sealing performance of the one-way valve directly affects the level of low-pressure fluid conversion to high-pressure fluid pressure, and thus affects the working efficiency and operating costs of high-pressure fluid equipment.

[0003] A common one-way valve reverse cut-off mechanism currently uses a soft seal method that combines a soft seal with a metal part. This sealing method has a short service life and is limited to applicable fluids. For example, in the use condition of hydrogen medium with continuous opening and closing pulse impact, hydrogen will cause the expansion stress of the sealing ring to increase. Under the action of multiple pulses, it is easy to be squeezed out and cracks will be formed, making it impossible to seal.

[0004] Therefore, how to improve the applicability of the one-way valve and extend its service life is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a one-way valve to improve the applicability of the one-way valve and extend its service life.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A one-way valve comprises a valve body, a sealing ball and a valve seat; a valve body channel is arranged on the valve body, the valve seat is fixedly connected to the inlet of the valve body channel, a valve seat channel is arranged on the valve seat, an outlet end of the valve seat channel is arranged with a hemispherical valve seat sealing surface facing the valve body channel, a sealing ring is arranged on the valve seat sealing surface, the sealing ball is arranged in the valve body channel, and can move freely in a confined space; the sealing ball can form a soft seal by pressing the sealing ring, and can form a hard seal after fitting and pressing the valve seat sealing surface, and after the sealing ball is separated from the sealing ring and the valve seat sealing surface, the valve seat channel can be connected to the valve body channel.

[0008] Preferably, an elastic member is further provided in the valve body to provide elastic force and push the sealing ball toward the valve seat.

[0009] Preferably, a valve flap is also provided in the valve body, and the valve flap is slidably connected to the valve body channel and the sliding direction is parallel to the direction of fluid flow, and the sealing ball is confined between the valve flap and the valve seat; a valve flap channel is provided on the valve flap, and after the sealing ball is separated from the sealing ring and the valve seat sealing surface, the valve seat channel is connected to the valve body channel via the valve flap channel.

[0010] Preferably, the valve body channel includes a first channel arranged between the valve seat and the valve disc, and a second channel arranged on the outlet side of the valve disc, and after the sealing ball is separated from the sealing ring and the valve seat sealing surface, the first channel is connected to the valve seat channel; the valve disc channel includes a side channel opened on the side of the valve disc, the inlet of the side channel is connected to the first channel, and the outlet is connected to the second channel.

[0011] Preferably, the end face of the inlet end of the valve flap is provided with a conical valve flap positioning surface for positioning the sealing ball, and the valve flap positioning surface can guide the sealing ball; the valve flap channel also includes a valve flap main channel opened at the outlet end of the valve flap, the outlet of the valve flap main channel is connected to the second channel, and the inlet is connected to the side channel and the valve flap positioning surface.

[0012] Preferably, an elastic member is also provided in the valve body, one end of the elastic member abuts against a step surface provided in the valve body channel, and the other end extends into and abuts against a step surface in the valve flap main channel; the elastic member is used to provide elastic force and push the sealing ball and the valve flap toward the valve seat.

[0013] Preferably, the sealing ball is a zirconia ceramic ball.

[0014] Preferably, the valve seat sealing surface is self-lubricating.

[0015] Preferably, an inlet installation through hole is provided in the valve body at the inlet end of the valve body channel, the butt surface between the inlet installation through hole and the valve body channel is a first conical surface, and the outer edge of the outlet end surface of the valve seat is a second conical surface that fits with the first conical surface to seal;

[0016] and / or,

[0017] The valve body is provided with an outlet installation through hole at the outlet end of the valve body channel, an outlet connecting pipeline communicating with the valve body channel is fixedly connected to the outlet installation through hole, the butt surface between the outlet installation through hole and the valve body channel is a third conical surface, and the outer edge of the inlet end surface of the outlet connecting pipeline is a fourth conical surface that fits with the third conical surface to seal;

[0018] and / or,

[0019] A fifth conical surface is provided at the inlet end of the valve seat, the inlet end of the valve seat is connected to an inlet connecting pipeline, and an outer edge of an end surface of an outlet end of the inlet connecting pipeline is a sixth conical surface that fits with the fifth conical surface to seal;

[0020] Preferably, an inlet installation through hole is provided in the valve body at the inlet end of the valve body passage, and an inlet leak detection hole is provided through the hole wall of the inlet installation through hole to detect external leakage of the valve body;

[0021] and / or,

[0022] An outlet installation through hole is provided in the valve body at the outlet end of the valve body passage, and an outlet leak detection hole is provided through the hole wall of the outlet installation through hole to detect the external leakage of the valve body;

[0023] and / or,

[0024] The inlet end of the valve seat is plugged into the outlet end of the through hole of the valve seat cover, and the inlet end of the through hole of the valve seat cover is plugged with an inlet connecting pipeline. A cover leak detection hole is set through the hole wall of the valve seat cover to detect external leakage at the connection between the inlet connecting pipeline and the valve seat.

[0025] The one-way valve provided by the present invention comprises a valve body, a sealing ball and a valve seat; a valve body channel is arranged on the valve body, the valve seat is fixedly connected to the inlet of the valve body channel, a valve seat channel is arranged on the valve seat, a hemispherical valve seat sealing surface facing the valve body channel is arranged at the outlet end of the valve seat channel, a sealing ring is arranged on the valve seat sealing surface, the sealing ball is arranged in the valve body channel, and can move freely in a limited space; the sealing ball can form a soft seal by pressing the sealing ring, and can form a hard seal after fitting and pressing the valve seat sealing surface, and after the sealing ball is separated from the sealing ring and the valve seat sealing surface, the valve seat channel can be connected to the valve body channel.

[0026] When this type of one-way valve is opened, there is a gap between the sealing ball, the sealing ring and the valve seat sealing surface, and the fluid can enter the valve body channel through the valve seat channel and then flow out of the valve body; the sealing ball can be pressed against the sealing ring and / or the valve seat sealing surface under the action of external force to achieve a combined seal of soft and hard seals, which can improve the sealing performance of reverse low pressure, extend the service life, and adapt to more working conditions; even if one seal fails, the sealing performance can still be guaranteed by means of another seal, which greatly improves the reverse low-pressure sealing performance of the one-way valve; by using a freely movable sealing ball as a sealing component, the sealing ball has a large contact area with the sealing ring and the hemispherical valve seat sealing surface, and the sealing ball can adaptively adjust its sealing position, thereby avoiding seal wear caused by fixed and concentrated sealing positions and extending service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 A cross-sectional view of a specific embodiment 1 of the one-way valve provided by the present invention in a sealed non-return state;

[0029] Figure 2 This is a cross-sectional view of a specific embodiment 1 of the one-way valve provided by the present invention in an unsealed state, wherein the arrow indicates the movable direction of the fluid;

[0030] Figure 3 A cross-sectional view of a valve body in a specific embodiment 1 of a one-way valve provided by the present invention;

[0031] Figure 4 A cross-sectional view of a valve seat in a specific embodiment 1 of a one-way valve provided by the present invention;

[0032] Figure 5 A cross-sectional view of a valve disc in a specific embodiment 1 of a one-way valve provided by the present invention;

[0033] Figure 6 A cross-sectional view of a valve seat gland in a specific embodiment 1 of a one-way valve provided by the present invention;

[0034] Figure 7 A cross-sectional view of an outlet gland in a specific embodiment 1 of a one-way valve provided by the present invention;

[0035] Figure 8 A cross-sectional view of an outlet screw sleeve in a specific embodiment 1 of a one-way valve provided by the present invention;

[0036] Fig. 9 A cross-sectional view of an inlet gland in a specific embodiment 1 of a one-way valve provided by the present invention;

[0037] Fig.10 It is a cross-sectional view of the inlet screw sleeve in the specific embodiment 1 of the one-way valve provided by the present invention.

[0038] Reference numerals:

[0039] Valve body 1, inlet mounting through hole 1-1, outlet mounting through hole 1-2, inlet leak detection hole 1-3, outlet leak detection hole 1-4, valve body channel 1-5, first step surface 1-51, second step surface 1-52, first channel 1-53, second channel 1-54, first cone surface 1-6, third cone surface 1-7;

[0040] Valve seat 2, conical head 2-1, valve seat sealing surface 2-11, second conical surface 2-12, mounting notch 2-13, long axis body 2-2, fifth conical surface 2-21, valve seat channel 2-3;

[0041] Valve disc 3, valve disc channel 3-1, valve disc main channel 3-11, side channel 3-12, valve disc positioning surface 3-2, valve disc small cylinder 3-3, valve disc large cylinder 3-4;

[0042] Valve seat gland 4, installation channel 4-1, inlet end notch 4-11, outlet end notch 4-12, gland leak detection hole 4-2;

[0043] Sealing ball 5;

[0044] Sealing ring 6;

[0045] Elastic member 7;

[0046] Outlet gland 8, outlet gland inlet 8-1, outlet gland outlet 8-2, outlet gland tapered hole 8-3;

[0047] Export screw sleeve 9;

[0048] Inlet gland 10, inlet gland inlet 10-1, inlet gland outlet 10-2, inlet gland cone hole 10-3;

[0049] Inlet screw sleeve 11. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The core of the present invention is to provide a one-way valve, improve the applicability of the one-way valve and extend its service life.

[0052] The one-way valve provided by the present invention has good sealing performance and can be applied to a high-pressure fluid equipment pressurization system and used as a high-pressure fluid one-way valve for low-pressure fluid pressurization output.

[0053] It should be noted that, for ease of description, the inlet and outlet in this application correspond to the direction in which the fluid is allowed to flow in the one-way valve, that is, the fluid flows from the inlet of the structure or component to the outlet. Figure 2 In the orientation, the left side is the entrance side and the right side is the exit side.

[0054] In the specific embodiment 1, please refer to Figures 1 to 10 The one-way valve comprises a valve body 1, a sealing ball 5 and a valve seat 2.

[0055] like Figures 1 to 3 As shown, a valve body channel 1-5 is provided on the valve body 1, and the valve seat 2 is fixedly connected to the inlet of the valve body channel 1-5.

[0056] like Figure 4 As shown, a valve seat channel 2-3 is provided on the valve seat 2, and a hemispherical valve seat sealing surface 2-11 facing the valve body channel 1-5 is provided at the outlet end of the valve seat channel 2-3. It should be noted that the hemispherical shape refers to a part of a complete sphere, which may be a 1 / 4 sphere, a 1 / 3 sphere, etc. as required. A sealing ring 6 is provided on the valve seat sealing surface 2-11, which specifically protrudes from the valve seat sealing surface 2-11. Specifically, an annular installation notch 2-13 is provided on the valve seat sealing surface 2-11 to install the sealing ring 6, which may specifically be a rubber ring.

[0057] like Figure 1 and Figure 2 As shown, the sealing ball 5 is disposed in the valve body channel 1-5 and can move freely in the limited space S in the valve body channel 1-5. Figure 1 As shown, the sealing ball 5 can form a soft seal by pressing the sealing ring 6, and can form a hard seal after being attached and pressed against the valve seat sealing surface 2-11. At this time, the valve seat sealing surface 2-11 constitutes a part of the boundary of the defined space S, and the remaining part of the boundary can be defined by the valve body 1 or the structure inside the valve body 1. Figure 2 As shown, after the sealing ball 5 is separated from the sealing ring 6 and the valve seat sealing surface 2-11, the valve seat channel 2-3 can be connected to the valve body channel 1-5. The valve seat 2 can be made of metal.

[0058] The one-way valve in this embodiment, when opened, has a gap between the sealing ball 5 and the sealing ring 6 and the valve seat sealing surface 2-11, and the fluid can enter the valve body channel 1-5 through the valve seat channel 2-3, and then flow out of the valve body 1; the sealing ball 5 can be pressed against the sealing ring 6 and / or the valve seat sealing surface 2-11 under the action of external force, so as to realize a combined sealing of soft sealing and hard sealing, which can improve the sealing performance of reverse low pressure, prolong the service life, and adapt to more working conditions. Even if one seal fails, the sealing performance can still be guaranteed with the help of another seal; by using the freely movable sealing ball 5 as a sealing member, the sealing ball 5 has a large contact area with the sealing ring 6 and the hemispherical valve seat sealing surface 2-11, and the sealing ball 5 can adaptively adjust its sealing position, thereby avoiding the wear of the seal caused by the fixing and concentration of the sealing position, and prolonging the service life.

[0059] like Figure 1As shown, an elastic member 7 is also provided in the valve body 1 to provide elastic force and push the sealing ball 5 toward the valve seat 2, so as to realize the automatic sealing action of the sealing ball 5 and the reset of the check mechanism of the one-way valve. When the inlet and outlet pressures of the one-way valve are within the set range, the sealing ball 5 can automatically maintain the sealing action of pressing the sealing surface of the valve seat and the sealing ring with the elastic force of the elastic member 7. Specifically, the elastic member 7 is a spring, one end of which is against the side wall of the valve body channel 1-5, and the other end presses the sealing ball 5; in other embodiments, the elastic member 7 can also be a spring.

[0060] like Figure 1 As shown, a valve flap 3 is also provided in the valve body 1, and the valve flap 3 is slidably connected to the valve body channel 1-5 and the sliding direction is parallel to the direction of fluid flow, so that the valve flap 3 can be close to the valve seat 2 by the fluid force in addition to the elastic force of the elastic member 7. In this embodiment, the valve body channel 1-5 is penetrated in a straight line direction, which is defined as the axial direction of the one-way valve, and the valve body channel 1-5 can be a cylindrical hole. At this time, the sliding direction of the valve flap 3 is parallel to the axial direction.

[0061] The sealing ball 5 is confined between the valve disc 3 and the valve seat 2. A valve disc channel 3-1 is provided on the valve disc 3. After the sealing ball 5 is separated from the sealing ring 6 and the valve seat sealing surface 2-11, the valve seat channel 2-3 is connected to the valve body channel 1-5 through the valve disc channel 3-1.

[0062] It should be noted that, in the direction of fluid flow, the valve seat 2 and the valve flap 3 respectively constitute the two boundaries of the limited space S in which the sealing ball 5 can move. Since the valve flap 3 has a guiding effect on the sealing ball 5 and the valve flap 3 is movable, the sealing ball 5 will not slip out between the valve flap 3 and the valve seat 2 within the movable stroke of the valve flap 3 in the direction perpendicular to the fluid flow. When the valve flap 3 is close to the valve seat 2, it can be ensured that it can press the sealing ball 5 onto the valve seat sealing surface 2-11 and the sealing ring 6.

[0063] Due to the additional valve flap 3, the sealing ball 5 can be further limited, which can further improve the sealing effect.

[0064] In valve disc 3, as Figure 2 and Figure 5As shown, the valve disc channel 3-1 includes a side channel 3-12 opened on the side of the valve disc 3. Specifically, the side channel 3-12 is an oblique flow channel hole inclined relative to the direction of linear movement of the valve disc 3. Correspondingly, the valve body channel 1-5 includes a first channel 1-53 arranged between the valve seat 2 and the valve disc 3, and a second channel 1-54 arranged on the outlet side of the valve disc 3. After the sealing ball 5 is separated from the sealing ring 6 and the valve seat sealing surface 2-11, the first channel 1-53 is connected to the valve seat channel 2-3, the inlet of the side channel 3-12 is connected to the first channel 1-53, and the outlet is connected to the second channel 1-54. Since the side channel 3-12 is opened on the side of the valve disc 3, it avoids the end face facing the valve seat sealing surface 2-11 for cooperating with the sealing ball 5 (that is, the valve disc positioning surface 3-2), which can prevent the sealing ball 5 and the valve disc 3 from being acted upon by the fluid force in the direction of fluid flow (corresponding to Figure 1 and Figure 2 When the valve disc 3-1 moves relative to the sealing ball 5 (in the right direction), there is a risk that the sealing ball 5 will seal the valve disc channel 3-1 and affect the normal flow of the fluid.

[0065] Among them, Figure 5 As shown, in order to increase the fluid flow rate, multiple valve flap channels 3-1 can be provided, for example, three, six, etc. Specifically, multiple side channels 3-12 are evenly opened along the circumferential direction on the side of the valve flap 3, and the outlets of each side channel 3-12 are connected to each other, thereby connecting to the second channel 1-54.

[0066] Among them, Figure 2 and Figure 5 As shown, the inlet end face of the valve disc 3 is provided with a conical valve disc positioning surface 3-2 for positioning the sealing ball 5. At this time, the valve disc positioning surface 3-2 is conical, which has a guiding effect on the sealing ball 5. In the process of pushing the sealing ball 5 toward the valve seat 2, the sealing ball 5 can be guided toward the center direction of the cone of the valve disc positioning surface 3-2, so as to further define the position of the sealing ball 5, so that the sealing ball 5 accurately flows to the valve seat sealing surface 2-11 and the sealing ring 6, and eliminates the leakage caused by the eccentric misalignment of the hemispherical valve seat sealing surface 2-11 of the valve seat outlet during the resetting check process of the sealing ball 5; in addition, the valve disc positioning surface 3-2 and the valve The seat sealing surface 2-11 can be buckled with the sealing ball 5. At this time, the valve disc positioning surface 3-2 is conical, which can support the sealing ball 5 in a direction inclined relative to the axial direction, provide support for the sealing ball 5, and cooperate with the sealing ring 6 and the valve seat sealing surface 2-11 to provide a clamping force to prohibit the sealing ball 5 from rotating. A small hole (cylindrical hole) connected to the valve disc channel 3-1 is opened at the central tip of the valve disc positioning surface 3-2, which is tangent to the sealing ball 5 and clamps the sealing ball 5, limiting the radial movement of the sealing ball 5, so that in the sealed state, the sealing ball 5 is ensured to be concentric with the valve seat sealing surface 2-11, effectively preventing the sealing ball 5 from moving under the action of the fluid and affecting the seal.

[0067] Among them, Figure 5As shown, the valve flap channel 3-1 also includes a valve flap main channel 3-11 opened at the outlet end of the valve flap 3, the outlet of the valve flap main channel 3-11 is connected to the second channel 1-54, and the inlet is connected to the side channel 3-12 and the valve flap positioning surface 3-2. Specifically, a channel is opened in the center of the valve flap positioning surface 3-2 (specifically, a small hole is opened, specifically a cylindrical hole opened at the central tip of the above-mentioned valve flap positioning surface 3-2) to connect the valve flap main channel 3-11. At this time, the fluid entering the side channel 3-12 and the gap between the sealing ball 5 and the valve flap positioning surface 3-2 can be collected in the valve flap main channel 3-11 and continue to flow backward. In addition, the small hole opened in the center of the valve flap positioning surface 3-2 is connected to the valve flap main channel 3-11, which can avoid the sealing ball 5 being sucked by the valve flap 3 when the fluid force is large, resulting in the sealing ring 5 being unable to adaptively adjust the sealing position to fit the valve seat sealing surface 2-11.

[0068] In addition, the valve flap main channel 3-11 can be used to accommodate the elastic member 7 in addition to being a flow channel. Figure 1 As shown, one end of the elastic member 7 abuts against the step surface provided in the valve flap passage 3-1, and the other end extends into and abuts against the step surface on the valve flap main passage 3-11. The elastic member 7 is used to provide elastic force to push the sealing ball 5 and the valve flap 3 toward the valve seat 2.

[0069] At this time, if Figure 2 and Figure 3 As shown, the valve body channel 1-5 is configured as a stepped hole, including a first step surface 1-51 and a second step surface 1-52 facing the inlet direction. One end of the elastic member 7 abuts against the first step surface 1-51, and the other end extends into the valve flap main channel 3-11. The second step surface 1-52 is used to limit the movement range of the valve flap 3. Specifically, the valve flap 3 slides with the channel side wall located on the inlet side of the second step surface 1-52 in the valve body channel 1-5. The valve flap 3 moves in a direction away from the valve seat 2 to the point where it abuts against the second step surface 1-52 at most. In addition, the valve seat sealing surface 2-11 cooperates with the sealing ball 5 to seal and prevent the fluid from flowing back. The sealing ball 5 and the valve flap 3 can be limited in another sliding direction of the valve flap 3, and at this time, as shown in FIG. Figure 2 As shown, the valve flap 3 and the sealing ball 5 can move in a small range within the valve body channel 1-5, between the second step surface 1-52 and the valve seat 2 under the action of fluid force or the elastic force of the elastic member 7.

[0070] In addition, the valve flap 3 is shaped like a bullet shell, and includes a small valve flap cylinder 3-3 and a large valve flap cylinder 3-4 whose diameter is larger than the small valve flap cylinder 3-3 along the fluid flow direction. The valve flap main channel 3-11 is opened on the large valve flap cylinder 3-4, which can be specifically a cylindrical cavity, and the side channel 3-12 and the valve flap positioning surface 3-2 are opened on the small valve flap cylinder 3-3.

[0071] In order to ensure the sealing ability of the sealing ball 5, the sealing ball 5 adopts a zirconia ceramic ball, which has good self-lubrication, corrosion resistance, friction resistance, and mechanical strength, which can not only reduce the processing requirements for the valve disc 3, but also reduce the leakage caused by pits on the metal surface during the collision or rotational friction of the hard seal on the valve seat 2, which is beneficial to improve the reverse low-pressure sealing performance of the one-way valve and improve the boosting efficiency of the high-pressure fluid boosting equipment. Of course, in other embodiments, the sealing ball 5 can also adopt a steel ball.

[0072] In order to ensure the sealing performance of the valve seat sealing surface 2-11, the valve seat sealing surface 2-11 has self-lubricating properties to reduce the wear caused by the rotation of the sealing ball 5 in the hard seal. Specifically, the valve seat sealing surface 2-11 can be self-lubricating, such as using surface silver plating or other processes to improve the surface roughness level, reduce the roughness, make the surface smooth, and improve the self-lubricating property; the valve seat 2 can also be directly made of other metals with excellent self-lubricating properties and wear resistance; other processes to improve the surface hardness and wear resistance of the valve seat 2 can also be used.

[0073] By processing the valve seat sealing surface 2-11 and selecting a zirconia ceramic ball for the sealing ball 5, the problem of the valve seat sealing surface 2-11 being damaged and causing pits and causing great leakage when the sealing ball 5 repeatedly collides and contacts with the valve seat 2 under the impact of fluid pulses can be avoided. In particular, under the working condition of hydrogen medium, when the sealing ring 6 on the valve seat sealing surface 2-11 is squeezed by pressure due to expansion due to hydrogen absorption, the formation of pits on the valve seat sealing surface 2-11 can be reduced or avoided, and the risk of the sealing ring 6 being scratched and squeezed is reduced, thereby improving the reverse low-pressure sealing performance of the one-way valve and extending its service life, achieving the effect of improving the reverse low-pressure sealing performance of the one-way valve when the sealing ball 5 is in good contact with the valve seat 2.

[0074] On the valve body 1, in order to facilitate its connection with other structures, such as Figure 1 As shown, an inlet installation through hole 1-1 and an outlet installation through hole 1-2 are respectively opened at the inlet end and the outlet end of the valve body channel 1-5 in the valve body 1, and the inlet installation through hole 1-1 and the outlet installation through hole 1-2 are respectively connected to the valve body channel 1-5.

[0075] The inlet installation through hole 1-1 is fixedly connected to the valve seat 2, specifically a detachable connection, and the outlet installation through hole 1-2 is fixedly connected to the outlet gland 8, specifically a detachable connection, which is convenient for the assembly and maintenance of the one-way valve. The detachable method can be threaded connection, bolt connection, clamping connection, etc.

[0076] Install through hole 1-1 side at the entrance, such as Figure 1 and Figure 3As shown, the interface between the inlet mounting through hole 1-1 and the valve body channel 1-5 is the first conical surface 1-6, and the outer edge of the outlet end surface of the valve seat 2 is the second conical surface 2-12 that fits with the first conical surface 1-6 to seal, so as to form a hard seal between the valve seat 2 and the valve body 1 to prevent the fluid from leaking to the outside of the valve body 1. It should be noted that in a one-way valve, leakage in the valve body channel 1-5 of the valve body 1 can be called internal leakage, and leakage in the remaining part of the one-way valve can be called external leakage. The first conical surface and the second conical surface 2-12 can be conical surfaces. In addition, the valve seat 2 and the valve body 1 can both adopt metal structures. In this case, the first conical surface can cooperate with the second conical surface 2-12 to form a metal seal.

[0077] During installation, the elastic member 7, the valve flap 3, the sealing ball 5, and the valve seat 2 can be installed in sequence through the inlet installation through hole 1-1.

[0078] Among them, Figure 1 As shown, in order to realize the installation of the valve seat 2, the one-way valve also includes a valve seat cover 4, the inlet end of the valve seat 2 is inserted into the through hole of the valve seat cover 4, and the valve seat cover 4 is fixedly connected to the inlet installation through hole 1-1, which can be specifically connected by threaded fitting.

[0079] Specifically, Figure 1 and Figure 4 As shown, the valve seat 2 is shaped like a bow and arrow, and specifically includes a long axis body 2-2 and a conical head 2-1 arranged in sequence along the fluid flow direction, the second conical surface 2-12 is arranged on the outer peripheral surface of the conical head 2-1, and the long axis body 2-2 is located in the middle of the end of the conical head 2-1 away from the sealing ball 5. The long axis body 2-2 is specifically a cylinder, and the conical head 2-1 and the long axis body 2-2 form an umbrella-shaped structure. The valve seat channel 2-3 runs through the conical head 2-1 and the long axis body 2-2. At this time, the long axis body 2-2 is inserted into the valve seat gland 4, and the first conical surface 1-6 and the end surface of the valve seat gland 4 facing the sealing ball 5 clamp the conical head 2-1.

[0080] In order to realize the connection of the valve seat gland 4 to other inlet pipeline structures, such as the inlet connecting pipeline, the inlet steel pipe, the inlet gland 10 and the inlet screw sleeve 11 are included. Figure 1 and Figure 6As shown, in the valve seat gland 4, an installation channel 4-1 is opened inside, and the inlet end of the installation channel 4-1 has an inlet end notch 4-11 to install the inlet gland 10, the inlet screw sleeve 11 and the inlet steel pipe. The inlet end notch 4-11 is processed with an internal thread for matching with the external thread on the inlet gland 10. The outlet end of the installation channel 4-1 has an outlet end notch 4-12, and the valve seat 2 is plugged into the installation channel 4-1, specifically connected to the long axis body 2-2. At the same time, the inlet end of the long axis body 2-2 can also be provided with a fifth cone surface 2-21, which is used to fit and seal with the sixth cone surface on the outer edge of the outlet end face of the inlet connecting pipeline, specifically the outer cone surface of the outlet end of the inlet steel pipe, so as to form a hard seal. In addition, a gland leak detection hole 4-2 is opened near the inlet end notch 4-11 near its internal thread position, which is used to detect the connection between the inlet steel pipe and the valve seat 2 and whether external leakage occurs.

[0081] Install through hole 1-2 side at the outlet, such as Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the docking surface between the outlet mounting through hole 1-2 and the valve body channel 1-5 is the third conical surface 1-7, and the outer edge of the inlet end face of the outlet connecting pipeline is the fourth conical surface that fits with the third conical surface 1-7 to seal, thereby realizing a hard seal on the outlet side and ensuring that the fluid enters the outlet connecting pipeline and then flows out smoothly.

[0082] The outlet connecting pipeline includes an outlet gland 8, an outlet screw sleeve 9 and an outlet steel pipe, and the fourth cone surface can be arranged on the outlet steel pipe. Figure 1 As shown, the outlet screw sleeve 9 is inserted into the inlet end of the outlet gland 8, and the outlet steel pipe is inserted into the outlet gland 8 and the outlet screw sleeve 9. The external thread of the outlet gland 8 cooperates with the internal thread of the outlet mounting through hole 1-2, and works together with the outlet screw sleeve 9 to firmly press and fasten the outlet steel pipe to the valve body 1.

[0083] Among them, Figure 7 As shown, in the outlet gland 8, there is a trumpet-shaped outlet gland conical hole 8-3 in the middle thereof facing the inlet direction, and two through holes are respectively provided on both sides of the outlet gland conical hole 8-3 for installing the outlet screw sleeve 9 and the outlet steel pipe. When the outlet steel pipe fits with the third cone surface 1-7 of the valve body 1 to form a first hard seal, the outlet gland conical hole 8-3 in the outlet gland 8 fits tightly with the outer cone surface of the outlet end of the outlet screw sleeve 9 to form a second hard seal, thereby firmly sealing the fluid in the pipeline of the outlet part.

[0084] Among them, Figure 8As shown, in the outlet screw sleeve 9, its shape is like a rugby ball, and its two ends are conical, which can be flexibly matched with other structures to form a seal, and this outlet screw sleeve 9 has low processing requirements, greatly reduces the defective rate of finished products, and can be mass-produced. In addition, the outlet screw sleeve 9 has threads inside, which can firmly press the outlet steel pipe to prevent the outlet steel pipe from axially moving and separating from the valve body 1 axially to cause leakage.

[0085] In addition, refer to Figure 1 , Figures 7 to 10 The outlet screw sleeve 9 and the inlet screw sleeve 11 can be symmetrically arranged screw sleeves with the same structure, and the outlet gland 8 and the inlet gland 10 can be symmetrically arranged glands with the same structure.

[0086] Specifically, Fig. 9 As shown, in the inlet gland 10, the middle part has a trumpet-shaped inlet gland tapered hole 10-3 facing the outlet direction, and the two sides of the inlet gland tapered hole 10-3 are respectively two through holes for installing the inlet screw sleeve 11 and the inlet steel pipe. When the inlet steel pipe fits with the fifth cone surface 2-21 of the valve seat 2 to form a first hard seal, the inlet gland tapered hole 10-3 in the inlet gland 10 fits tightly with the outer cone surface of the inlet end of the inlet screw sleeve 11 to form a second hard seal, thereby firmly sealing the fluid in the pipeline of the outlet part.

[0087] Specifically, Fig.10 As shown, in the inlet screw sleeve 11, its shape is like a rugby ball, and the two ends are conical, and other structures can be flexibly matched to form a seal. In addition, the inlet screw sleeve 11 has threads inside, which can firmly compress the inlet steel pipe to avoid the inlet steel pipe axial movement and axial separation from the valve seat 2 to cause leakage.

[0088] In addition, if Figure 3 As shown, an inlet leak detection hole 1-3 is provided through the hole wall of the inlet installation through hole 1-1 of the valve body 1, and an outlet leak detection hole 1-4 is provided through the hole wall of the outlet installation through hole 1-2, for detecting external leakage of the valve body 1. Specifically, the inlet leak detection hole 1-3 and the outlet leak detection hole 1-4 can be respectively opened at the edge of the internal thread of the inlet installation through hole 1-1 and the outlet installation through hole 1-2 close to the valve body channel 1-5, or located at the gap between the corresponding internal thread and the valve body channel 1-5.

[0089] When the one-way valve in this embodiment is applied to the high-pressure fluid boosting condition, the working principle includes:

[0090] like Figure 2As shown, when pressure increase is required, the stop valve on the system pipeline is opened, the system pipeline is connected, and the high-pressure fluid equipment sucks in the low-pressure fluid. At this time, the pressure at the front end of the inlet of the one-way valve is higher than the pressure at the rear end of the outlet of the one-way valve, the sealing ball 5 and the valve disc 3 move to the right, the sealing ball 5 is separated from the valve seat 2 to release the seal, the elastic member 7 is compressed, the one-way valve is opened, and the fluid flows into the one-way valve;

[0091] When the fluid fills the cavity of the high-pressure fluid device, the high-pressure fluid device starts to do work on the sucked low-pressure fluid, the fluid pressure increases, and the valve flap 3 and the sealing ball 5 immediately move to the left under the action of the fluid pressure and the elastic force of the elastic member 7, closing the one-way valve, and the reverse flow of the fluid is blocked. The high-pressure fluid can only flow on the outlet side of the one-way valve, and the pressurization is completed;

[0092] like Figure 1 As shown, when the high-pressure fluid equipment completes its work and the pressure at the rear end of the one-way valve outlet decreases and becomes equal to the pressure at the front end of the one-way valve inlet, the valve flap 3 and the sealing ball 5 can also be firmly pressed against the valve seat 2 with the help of the elastic force of the elastic member 7 to prevent the fluid from leaking and reversely pressurizing when the pressure is low, thereby reducing the pressurization efficiency of the high-pressure fluid boosting equipment; wherein, when the sealing ball 5 fits against the valve seat 2, the sealing ball 5 and the valve seat sealing surface 2-11 form a first seal, i.e., a hard seal, and the sealing ring 6 and the sealing ball 5 form a second seal, i.e., a soft seal. The soft and hard seals work together, and cooperate with the reset elastic force provided by the elastic member 7 to improve the reverse low-pressure sealing performance of the one-way valve.

[0093] It should be noted that when an element is referred to as "fixed" to another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an element in the middle. In addition, in the description of the present invention, unless otherwise specified, "multiple", "multiple roots", "multiple groups" mean two or more.

[0094] The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0095] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0096] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0097] The one-way valve provided by the present invention is introduced in detail above. The principle and implementation mode of the present invention are explained in this article by using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A one-way valve, characterized in that: It comprises a valve body (1), a sealing ball (5) and a valve seat (2); The valve body (1) is provided with a valve body channel (1-5), the valve seat (2) is fixedly connected to the inlet of the valve body channel (1-5), the valve seat channel (2-3) is provided on the valve seat (2), the outlet end of the valve seat channel (2-3) is provided with a hemispherical valve seat sealing surface (2-11) facing the valve body channel (1-5), a sealing ring (6) is provided on the valve seat sealing surface (2-11), and the sealing ball (5) is arranged in the valve body channel (1-5) and can move freely in the limited space (S); The sealing ball (5) can form a soft seal by pressing the sealing ring (6), and can form a hard seal after being attached to and pressed against the valve seat sealing surface (2-11); after the sealing ball (5) is separated from the sealing ring (6) and the valve seat sealing surface (2-11), the valve seat channel (2-3) can be connected to the valve body channel (1-5).

2. The one-way valve according to claim 1, characterized in that: An elastic member (7) is also provided in the valve body (1) to provide elastic force and push the sealing ball (5) toward the valve seat (2).

3. The one-way valve according to claim 1, characterized in that: A valve flap (3) is also provided in the valve body (1), the valve flap (3) is slidably connected to the valve body channel (1-5) and the sliding direction is parallel to the direction of fluid flow, and the sealing ball (5) is confined between the valve flap (3) and the valve seat (2); A valve disc channel (3-1) is provided on the valve disc (3); after the sealing ball (5) is separated from the sealing ring (6) and the valve seat sealing surface (2-11), the valve seat channel (2-3) is connected to the valve body channel (1-5) via the valve disc channel (3-1).

4. The one-way valve according to claim 3, characterized in that: The valve body channel (1-5) comprises a first channel (1-53) provided between the valve seat (2) and the valve flap (3), and a second channel (1-54) provided on the outlet side of the valve flap (3), and after the sealing ball (5) is separated from the sealing ring (6) and the valve seat sealing surface (2-11), the first channel (1-53) is connected to the valve seat channel (2-3); The valve flap channel (3-1) comprises a side channel (3-12) opened on the side of the valve flap (3); the inlet of the side channel (3-12) is connected to the first channel (1-53), and the outlet is connected to the second channel (1-54).

5. The one-way valve according to claim 4, characterized in that: The inlet end face of the valve flap (3) is provided with a conical valve flap positioning surface (3-2) for positioning the sealing ball (5), and the valve flap positioning surface (3-2) can guide the sealing ball (5); the valve flap channel (3-1) also includes a valve flap main channel (3-11) opened at the outlet end of the valve flap (3), the outlet of the valve flap main channel (3-11) is connected to the second channel (1-54), and the inlet is connected to the side channel (3-12) and the valve flap positioning surface (3-2).

6. The one-way valve according to claim 5, characterized in that: An elastic member (7) is also provided in the valve body (1), one end of the elastic member (7) abuts against a step surface provided in the valve body channel (1-5), and the other end extends into and abuts against a step surface in the valve flap main channel (3-11); the elastic member (7) is used to provide elastic force and push the sealing ball (5) and the valve flap (3) toward the valve seat (2).

7. The one-way valve according to any one of claims 1 to 6, characterized in that: The sealing ball (5) is a zirconia ceramic ball.

8. The one-way valve according to any one of claims 1 to 6, characterized in that: The valve seat sealing surface (2-11) has self-lubricating properties.

9. The one-way valve according to any one of claims 1 to 6, characterized in that: The valve body (1) is provided with an inlet installation through hole (1-1) at the inlet end of the valve body channel (1-5); the butt joint surface between the inlet installation through hole (1-1) and the valve body channel (1-5) is a first conical surface (1-6); and the outer edge of the outlet end surface of the valve seat (2) is a second conical surface (2-12) that fits with the first conical surface (1-6) to form a seal; and / or, The valve body (1) is provided with an outlet installation through hole (1-2) at the outlet end of the valve body channel (1-5); an outlet connecting pipeline communicating with the valve body channel (1-5) is fixedly connected to the outlet installation through hole (1-2); a butt joint surface between the outlet installation through hole (1-2) and the valve body channel (1-5) is a third conical surface (1-7); and an outer edge of an end surface of an inlet end of the outlet connecting pipeline is a fourth conical surface that fits with the third conical surface (1-7) to seal; and / or, A fifth conical surface (2-21) is provided at the inlet end of the valve seat (2), the inlet end of the valve seat (2) is connected to an inlet connecting pipeline, and the outer edge of the end surface of the outlet end of the inlet connecting pipeline is a sixth conical surface that fits with the fifth conical surface (2-21) to seal.

10. The one-way valve according to any one of claims 1 to 6, characterized in that: The valve body (1) is provided with an inlet installation through hole (1-1) at the inlet end of the valve body channel (1-5), and an inlet leak detection hole (1-3) is provided through the hole wall of the inlet installation through hole (1-1) for detecting external leakage of the valve body (1); and / or, An outlet installation through hole (1-2) is provided in the valve body (1) at the outlet end of the valve body channel (1-5), and an outlet leak detection hole (1-4) is provided through the hole wall of the outlet installation through hole (1-2) for detecting external leakage of the valve body (1); and / or, The inlet end of the valve seat (2) is plugged into the outlet end of the through hole of the valve seat gland (4), and an inlet connecting pipeline is plugged into the inlet end of the through hole of the valve seat gland (4). A gland leak detection hole (4-2) is provided through the hole wall of the valve seat gland (4) to detect external leakage at the connection between the inlet connecting pipeline and the valve seat (2).

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