One-way valve resistant to high temperature and high pressure
Through the linear sealing structure formed by the inclined surface and step and the sliding sliding sleeve design, the problem of sealing failure of traditional check valves under high temperature and high pressure is solved, and the sealing performance and fluid buffering under high temperature and high pressure is achieved, which extends the service life and reduces maintenance costs.
Patent Information
- Application Number
- CN202510530958.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2025-07-08
AI Technical Summary
Traditional check valves fail sealing and mechanical performance in high temperature and high pressure environments, resulting in fluid leakage and shortened service life, affecting production safety and cost.
A linear sealing structure formed by a slope and a step is adopted, combined with a slidable sliding sleeve and a valve ball spring, and a detection hole and a lifting partition are set to achieve sealing detection and fluid buffering under high temperature and high pressure.
It improves the sealing and fluid buffering capacity of the check valve under high temperature and high pressure, extends the service life, reduces maintenance costs, and ensures production continuity.
Smart Images
Figure CN120274098A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of check valves, and specifically to a check valve resistant to high temperature and high pressure. Background Art
[0002] In the field of modern industrial production, many scenarios pose strict requirements on the pressure resistance and temperature resistance of equipment. As a key component of the fluid control system, the performance of the check valve directly affects the operation stability and reliability of the entire system.
[0003] Traditional check valves, such as ball valves, cone valves, and plate valves, mostly use gasket seals. This sealing method can meet the basic usage requirements under normal working conditions where the pressure is not higher than 100 MPa and the temperature does not exceed 150 °C. However, with the progress of technology, in fields such as petrochemical industry, deep-sea exploration, and ultra-high pressure water jet machining, the working environment has become increasingly extreme. In some synthesis reaction links in the petrochemical industry, the reaction pressure often reaches above 200 MPa, and even in some special processes, the pressure is as high as 1000 MPa, while the reaction temperature exceeds 120 °C.
[0004] Under these extreme working conditions, the gasket seal structure of conventional check valves is extremely prone to softening due to high temperature and deformation due to high pressure, resulting in seal failure and further causing fluid leakage. Leakage not only causes material waste and increases production costs, but may also trigger safety accidents, threatening the lives of personnel and the safety of equipment. In addition, the mechanical properties of the materials of traditional check valves will significantly decline in high temperature and high pressure environments, resulting in problems such as spool wear and spring elastic failure, greatly shortening the service life of the check valve. Frequent replacement not only increases the maintenance cost, but also affects the continuity of production. Summary of the Invention
[0005] (I) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides a check valve resistant to high temperature and high pressure, which has the advantages of being resistant to high temperature and high pressure, and solves the problem that the mechanical properties of the materials of traditional check valves in the prior art will significantly decline in high temperature and high pressure environments.
[0006] (II) Technical Solutions To achieve the above object, the present invention provides the following technical solutions: A check valve resistant to high temperature and high pressure, including a connecting body. An upper valve seat, a valve sleeve, and a lower valve seat are sequentially arranged in the connecting body from top to bottom. Both the upper valve seat and the lower valve seat have one end as a plane and the other end as an inclined plane. The upper inclined plane of the upper valve seat is in line contact sealing with the end face of the stepped hole on the connecting body. Both ends of the valve sleeve have a structure with a plane at the center and an inclined plane on the outside. The contact surfaces between the valve sleeve and the upper valve seat, and between the valve sleeve and the lower valve seat adopt inclined plane and small contact surface seals; A sliding sleeve slides within the valve sleeve. A valve ball and a valve ball spring are arranged within the sliding sleeve. One end of the valve ball spring presses against the valve ball, and the other end abuts against the lower end face of the upper valve seat. The valve ball abuts against the orifice of the lower valve seat, and side slot holes are provided on the side surface of the sliding sleeve.
[0007] Preferably, the valve sleeve is an integrally cast unit.
[0008] Preferably, the valve sleeve is a composite body composed of two parts, including an upper valve sleeve and a lower valve sleeve. The upper valve sleeve and the lower valve sleeve are connected by an intermediate spring. When the sliding sleeve slides to the highest and lowest points, it can cover the gap between the upper valve sleeve and the intermediate spring. The upper surface of the upper valve sleeve and the lower surface of the lower valve sleeve have a structure with a flat center and a beveled outer side.
[0009] Preferably, a stepped inner hole is provided within the sliding sleeve. The valve ball fits against the inner wall of the inner hole of the sliding sleeve. The stepped inner hole is used to limit the sliding range of the valve ball. When water flows from the upper valve seat to the lower valve seat, the valve ball blocks the orifice of the lower valve seat to block the water flow. When water flows from the lower valve seat to the upper valve seat, under the action of water pressure, the valve ball slides upward to compress the valve ball spring, and the water flows upward through the side slot holes.
[0010] Preferably, a threaded hole with an internal thread is provided at one end of the connecting body away from the lower valve seat. A threaded hole bottom groove is provided at the bottom of the threaded hole, and a detection hole is provided on the threaded hole bottom groove. The detection hole is used to detect leakage.
[0011] Preferably, an ultra-high pressure pipeline is installed within the threaded hole. A pipeline joint is fixed to the outside of the ultra-high pressure pipeline, and the outside of the pipeline joint is threadedly connected to the inside of the threaded hole.
[0012] Preferably, a gas pressure sensor is provided within the detection hole. When high-pressure gas leaks between the gaps of the ultra-high pressure pipeline and the inner hole of the connecting body, the gas pressure sensor within the detection hole detects an increase in pressure and issues an alarm.
[0013] Preferably, an external thread is provided at one end of the connecting body close to the lower valve seat for fixing the connector. The lower inclined surface of the lower valve seat is in line contact sealing with the end face of the stepped hole on the connector.
[0014] Preferably, upper sliding grooves and lower sliding grooves are respectively provided at corresponding positions on the upper valve sleeve and the intermediate spring. A lifting partition is further provided within the lower valve sleeve. The lifting partition is in the shape of an annular sleeve. The top of the lifting partition slides within the upper sliding groove, and the bottom of the lifting partition slides within the lower sliding groove. The lifting partition divides the cavity between the upper valve sleeve and the intermediate spring into an inner cavity close to the sliding sleeve and an outer cavity away from the sliding sleeve. The intermediate spring is arranged within the outer cavity, thereby reducing the erosion of the intermediate spring by the fluid.
[0015] Preferably, a position sensor is provided on the lifting partition plate. A magnet is fixed on one side of the outer cavity of the lifting partition plate, and a Hall element is fixed on the outside of the connecting body to detect the position of the lifting partition plate, so as to determine whether there is looseness in the valve body. An upper ventilation hole is provided above the upper sliding groove and penetrates through the upper valve sleeve. A ventilation hole is provided below the lower sliding groove and penetrates through the lower valve sleeve. Since the connection between the upper part of the upper valve sleeve and the lower part of the lower valve sleeve is a bevel surface, an upper stepped cavity and a lower stepped cavity are respectively formed at the connection between the upper part of the upper valve sleeve and the upper valve seat and at the connection between the lower part of the lower valve sleeve and the lower valve seat. The upper sliding groove communicates with the upper stepped cavity through the upper ventilation hole, and the lower sliding groove communicates with the lower stepped cavity through the ventilation hole. The sealing conditions of the upper stepped cavity and the lower stepped cavity can be judged by the position of the lifting partition plate.
[0016] (III) Beneficial effects
[0017] Compared with the prior art, the present invention provides a one-way valve resistant to high temperature and high pressure, having the following beneficial effects: 1. For this one-way valve resistant to high temperature and high pressure, the sealing method between the upper valve seat and the connecting body adopts a line seal formed by a bevel surface and a step, and the sealing method between the upper valve seat and the valve sleeve adopts a bevel surface and a small contact surface seal, avoiding the problem of performance degradation of high temperature and high pressure resistance caused by the use of sealing rings. At the same time, the slidable sliding sleeve cooperates with the elastic valve ball spring, improving the buffering ability of the one-way valve to high-pressure fluid.
[0018] 2. For this one-way valve resistant to high temperature and high pressure, the detection hole is provided in the bottom groove of the threaded hole to achieve the purpose of detecting the sealing performance.
[0019] 3. For this one-way valve resistant to high temperature and high pressure, the valve sleeve is set as a combined body composed of an upper valve sleeve and a lower valve sleeve. The upper valve sleeve and the lower valve sleeve are elastically connected by a middle spring. On the one hand, the elastic force of the middle spring is used to increase the pressing force on both sides of the upper valve seat and the valve sleeve. On the other hand, the thickness of the valve sleeve becomes adjustable and can fit better when connected to the connecting head.
[0020] 4. For this one-way valve resistant to high temperature and high pressure, through the combination of the valve sleeve and the sliding sleeve, when the fluid flows from the upper valve seat to the lower valve seat, the high-pressure fluid enters the gap between the upper valve sleeve and the lower valve sleeve from the side groove holes. Under the action of the fluid pressure, the squeezing force of the upper valve sleeve and the lower valve sleeve towards both sides is increased, thereby improving the sealing performance.
[0021] 5. The one-way valve resistant to high temperature and high pressure divides the space between the upper valve sleeve and the lower valve sleeve into an inner cavity and an outer cavity by arranging a lifting partition plate in the valve sleeve, which avoids the erosion of the middle spring by the fluid. At the same time, by detecting the position of the lifting partition plate, the displacement of the upper valve sleeve and the lower valve sleeve can be judged to determine whether the connection is loose, and the pressure changes in the upper stepped cavity and the lower stepped cavity can also be detected to judge whether the sealing structure of the upper valve sleeve and the lower valve sleeve leaks. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 An exploded view of Embodiment 1 of the present invention.
[0023] Figure 2 A sectional view of Embodiment 1 of the present invention.
[0024] Figure 3 A structural schematic diagram of Embodiment 1 of the present invention when in use.
[0025] Figure 4 A sectional view of Embodiment 1 of the present invention when in use.
[0026] Figure 5 A sectional view of the connection part between the connecting body and the ultra-high pressure pipeline in Embodiment 1 of the present invention.
[0027] Figure 6 A structural schematic diagram of the sliding sleeve in Embodiment 1 of the present invention.
[0028] Figure 7 A sectional view of Embodiment 2 of the present invention.
[0029] Figure 8 A structural schematic diagram of the valve sleeve in Embodiment 2 of the present invention.
[0030] Figure 9 A sectional view of Embodiment 3 of the present invention.
[0031] Figure 10 An exploded view of the valve sleeve in Embodiment 3 of the present invention.
[0032] In the figures: 1, connecting body; 2, upper valve seat; 3, valve sleeve; 4, lower valve seat; 5, sliding sleeve; 6, valve ball; 7, valve ball spring; 8, connector; 91, pipeline connector; 92, ultra-high pressure pipeline; 11, threaded hole; 12, bottom groove of threaded hole; 13, detection hole; 31, upper valve sleeve; 32, middle spring; 33, lower valve sleeve; 34, lifting partition plate; 311, upper sliding groove; 312, upper ventilation hole; 331, lower sliding groove; 332, ventilation hole; 301, inner cavity; 302, outer cavity; 303, upper stepped cavity; 304, lower stepped cavity; 51, side groove hole. Detailed implementation manners
[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.
[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.
[0035] In addition, a fixed connection means that after the parts or components are fixed, there is no relative movement; a transmission connection means a connection method that transmits mechanical motion or torque to other working parts through transmission parts; a sliding connection means a connection method in which two objects are in contact but not fixed and can slide relative to each other; a rotational connection means a connection method in which two objects are in contact but not fixed and can rotate relative to each other.
[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.
[0037] Embodiment 1: This embodiment provides a one-way valve resistant to high temperature and high pressure, having the following technical features.
[0038] Please refer to Figures 1-6 , a one-way valve resistant to high temperature and high pressure, including a connecting body 1. Inside the connecting body 1, an upper valve seat 2, a valve sleeve 3, and a lower valve seat 4 are sequentially arranged from top to bottom. Both the upper valve seat 2 and the lower valve seat 4 have one end as a plane and the other end as an inclined plane. The upper inclined plane of the upper valve seat 2 is in line contact sealing with the end face of the stepped hole on the connecting body 1. Both ends of the valve sleeve 3 have a structure with a plane at the center and an inclined plane on the outside. The contact surfaces between the valve sleeve 3 and the upper valve seat 2, and between the valve sleeve 3 and the lower valve seat 4 adopt inclined plane and small contact surface sealing;
[0039] A sliding sleeve 5 slides inside a valve sleeve 3. A valve ball 6 and a valve ball spring 7 are arranged inside the sliding sleeve 5. One end of the valve ball spring 7 presses on the valve ball 6, and the other end abuts against the lower end face of the upper valve seat 2. The valve ball 6 abuts against the orifice of the lower valve seat 4. A side groove hole 51 is arranged on the side of the sliding sleeve 5.
[0040] Furthermore, the valve sleeve 3 is an integrally cast unit.
[0041] Furthermore, a stepped inner hole is arranged inside the sliding sleeve 5. The valve ball 6 fits against the inner wall of the inner hole of the sliding sleeve 5. The stepped inner hole is used to limit the sliding range of the valve ball 6. When water flows from the upper valve seat 2 to the lower valve seat 4, the valve ball 6 blocks the orifice of the lower valve seat 4 to cut off the water flow. When water flows from the lower valve seat 4 to the upper valve seat 2, under the action of water pressure, the valve ball 6 slides upward to compress the valve ball spring 7, and the water flow passes through the side groove hole 51 and flows upward.
[0042] Furthermore, a threaded hole 11 with internal threads is arranged at one end of the connecting body 1 away from the lower valve seat 4. A threaded hole bottom groove 12 is arranged at the bottom inside the threaded hole 11. A detection hole 13 is arranged on the threaded hole bottom groove 12. The detection hole 13 is used to detect leakage.
[0043] Furthermore, the ultra-high pressure pipeline 92 is installed inside the threaded hole 11. A pipeline joint 91 is fixed on the outside of the ultra-high pressure pipeline 92. The outside of the pipeline joint 91 is threadedly connected to the inside of the threaded hole 11.
[0044] It should be noted that the connection method between the outside of the ultra-high pressure pipeline 92 and the pipeline joint 91 includes any one of threaded connection, step fixing or taper fixing.
[0045] Furthermore, a gas pressure sensor is arranged inside the detection hole 13. When high-pressure gas leaks between the gap of the ultra-high pressure pipeline 92 and the inner hole of the connecting body 1, the gas pressure sensor inside the detection hole 13 detects an increase in pressure and thus issues an alarm.
[0046] Furthermore, an external thread is arranged at one end of the connecting body 1 close to the lower valve seat 4 for fixing the connector 8. The lower inclined surface of the lower valve seat 4 is in line contact sealing with the end face of the stepped hole on the connector 8.
[0047] It should be noted that the connecting body 1, the upper valve seat 2, the valve sleeve 3, the lower valve seat 4 and the sliding sleeve 5 are reasonably selected in terms of materials and have mechanical property requirements to meet ultra-high pressure. The tensile strength is not less than 145 ksi (1000 MPa), the yield strength is not less than 125 ksi (860 MPa), and the elongation is not less than 12%. At the same time, there are also corresponding requirements for aspects such as hardness, impact toughness, and corrosion resistance.
[0048] It should be noted that there may be slight differences in specific heat treatment parameters and performance requirements, and specific standards and specifications can be selected according to actual needs and usage conditions.
[0049] It should be noted that the surface roughness of the sealing contact surface reaches Ra0.2, and the geometric tolerances such as coaxiality are 0.01.
[0050] It should be noted that there shall be no defects such as scratches and depressions on the sealing surface. Check each surface with a triple magnifying glass, and there shall be no cracks.
[0051] Working principle: Installation steps. Install the upper valve seat 2 and the valve sleeve 3 into the connector 1 in sequence, then install the sliding sleeve 5 into the inner hole of the valve sleeve 3, then install the lower valve seat 4 into the connector 1, and finally connect the connector 8 and the connector 1 by thread. The connector 8 abuts against the lower valve seat 4.
[0052] Embodiment 2: This embodiment provides a check valve resistant to high temperature and high pressure, which has the following technical features.
[0053] As Figures 7-8 shown, a check valve resistant to high temperature and high pressure includes a connector 1. Inside the connector 1, there are arranged an upper valve seat 2, a valve sleeve 3, and a lower valve seat 4 from top to bottom in sequence. Both the upper valve seat 2 and the lower valve seat 4 have a flat end and an inclined end. The upper inclined surface of the upper valve seat 2 is in line contact sealing with the end face of the stepped hole on the connector 1. Both ends of the valve sleeve 3 have a structure with a flat center and an inclined outer side. The contact surfaces between the valve sleeve 3 and the upper valve seat 2, and between the valve sleeve 3 and the lower valve seat 4 are sealed by an inclined surface and a small contact surface; A sliding sleeve 5 slides inside the valve sleeve 3. Inside the sliding sleeve 5, there are arranged a valve ball 6 and a valve ball spring 7. One end of the valve ball spring 7 presses on the valve ball 6, and the other end abuts against the lower end face of the upper valve seat 2. The valve ball 6 abuts against the orifice of the lower valve seat 4. There is a side groove hole 51 on the side of the sliding sleeve 5; The valve sleeve 3 is a combined body composed of two parts, including an upper valve sleeve 31 and a lower valve sleeve 33. The upper valve sleeve 31 and the lower valve sleeve 33 are connected by a middle spring 32. When the sliding sleeve 5 slides to the highest point and the lowest point, it can cover the gap between the upper valve sleeve 31 and the middle spring 32. The upper surface of the upper valve sleeve 31 and the lower surface of the lower valve sleeve 33 have a structure with a flat center and an inclined outer side.
[0054] Working principle: The valve sleeve 3 is divided into an upper valve sleeve 31 and a lower valve sleeve 33, and they are elastically connected by a middle spring 32. When the pump head 8 and the connector 1 are fixed by thread, the gap between the upper valve sleeve 31 and the lower valve sleeve 33 can be adjusted to make the fit closer.
[0055] Embodiment 3: This embodiment provides a check valve resistant to high temperature and high pressure, which has the following technical features in addition to Embodiment 2.
[0056] AsFigures 9-10 As shown, further provided, the upper valve sleeve 31 and the middle spring 32 are respectively provided with an upper sliding groove 311 and a lower sliding groove 331 at corresponding positions. An elevating partition plate 34 is further provided inside the lower valve sleeve 33. The elevating partition plate 34 is in the shape of an annular sleeve. The top of the elevating partition plate 34 slides in the upper sliding groove 311, and the bottom of the elevating partition plate 34 slides in the lower sliding groove 331. The elevating partition plate 34 divides the cavity between the upper valve sleeve 31 and the middle spring 32 into an inner cavity 301 close to the sliding sleeve 5 and an outer cavity 302 far from the sliding sleeve 5. The middle spring 32 is arranged in the outer cavity 302, thereby reducing the erosion of the middle spring 32 by the fluid.
[0057] Further provided, a position sensor is arranged on the elevating partition plate 34. A magnet is fixed on one side of the elevating partition plate 34 in the outer cavity 302, and a Hall element is fixed on the outside of the connecting body 1 for detecting the position of the elevating partition plate 34, so as to judge whether there is looseness in the valve body; an upper vent hole 312 is arranged above the upper sliding groove 311 and penetrates through the upper valve sleeve 31, and a vent hole 332 is arranged below the lower sliding groove 331 and penetrates through the lower valve sleeve 33. Since the connection between the upper part of the upper valve sleeve 31 and the lower part of the lower valve sleeve 33 is a bevel surface, an upper stepped cavity 303 and a lower stepped cavity 304 are respectively generated at the connection between the upper part of the upper valve sleeve 31 and the upper valve seat 2 and at the connection between the lower part of the lower valve sleeve 33 and the lower valve seat 4. The upper sliding groove 311 communicates with the upper stepped cavity 303 through the upper vent hole 312, and the lower sliding groove 331 communicates with the lower stepped cavity 304 through the vent hole 332. The sealing conditions of the upper stepped cavity 303 and the lower stepped cavity 304 can be judged by the position of the elevating partition plate 34.
[0058] It should be noted that the position sensor is a Hall type position sensor. The Hall type position sensor consists of a Hall element, a magnet and a signal processing circuit. The Hall element is the core component. It is generally made of semiconductor material and is sensitive to magnetic fields. It is arranged on the outside of the connecting body (1). The magnet is used to generate a magnetic field. When the Hall element is in this magnetic field, it will be affected by the magnetic field and is arranged on the elevating partition plate (34). The signal processing circuit is used to amplify, filter, shape and other processes the electrical signal generated by the Hall element in order to output a stable and reliable position signal. Working process: When the position of the elevating partition plate (34) changes, it will drive the magnet to generate a displacement relative to the Hall element, thereby changing the magnetic field intensity at the position where the Hall element is located. According to the Hall effect, the change in the magnetic field intensity will cause a corresponding change in the Hall potential difference output by the Hall element. The signal processing circuit processes the weak electrical signal output by the Hall element and then converts it into a digital signal or an analog signal related to the position for output. By analyzing and processing these output signals, the position information of the measured object can be determined.
[0059] Working principle: During installation, first install the upper valve sleeve 31, then insert the lifting partition plate 34 into the upper sliding groove 311, and then install the lifting partition plate 34 and the lower valve sleeve 33 so that the lower sliding groove 331 is aligned with the lifting partition plate 34; During use, the lifting partition plate 34 can isolate the fluid from the middle spring 32. When the connection between the connecting body 1 and the connector 8 becomes loose, under the action of the middle spring 32, the distance between the upper valve sleeve 31 and the lower valve sleeve 33 increases. At this time, since the pressure in the upper and lower cavities of the lifting partition plate 34 remains unchanged, the lifting partition plate 34 will be located at a fixed ratio position between the upper valve sleeve 31 and the lifting partition plate 34. For example, when the pressure in the upper sliding groove 311 and the lower sliding groove 331 is the same, the middle of the lifting partition plate 34 is located in the middle of the upper valve sleeve 31 and the lower valve sleeve 33. Therefore, when the distance between the upper valve sleeve 31 and the lower valve sleeve 33 changes, the lifting partition plate 34 will also displace relative to the connecting body 1. At this time, the position change can be detected by the external Hall element, thus playing a role in reminding of looseness; Since the upper side of the upper valve sleeve 31 and the lower side of the lower valve sleeve 33 are both bevel seals, an upper stepped cavity 303 and a lower stepped cavity 304 are formed. When the upper bevel or the lower bevel of the lower valve sleeve 33 leaks, the pressure in the upper stepped cavity 303 or the lower stepped cavity 304 changes rapidly. Since the upper stepped cavity 303 is connected to the upper sliding groove 311 through the upper vent hole 312, and the lower stepped cavity 304 is connected to the lower sliding groove 331 through the vent hole 332, the lifting partition plate 34 will move when the pressure in the upper stepped cavity 303 or the lower stepped cavity 304 changes rapidly. Therefore, the movement of the lifting partition plate 34 can not only detect the displacement of the upper valve sleeve 31 and the lower valve sleeve 33 to judge connection looseness, but also detect the pressure in the upper stepped cavity 303 and the lower stepped cavity 304 to judge whether the sealing structure of the upper valve sleeve 31 and the lower valve sleeve 33 leaks.
[0060] In summary, for this high-temperature and high-pressure one-way valve, by adopting a line seal formed by a bevel and a step for the sealing method between the upper valve seat 2 and the connecting body 1, and a bevel and a small contact surface seal for the sealing method between the upper valve seat 2 and the valve sleeve 3, the problem of performance degradation of high-temperature and high-pressure resistance caused by the use of sealing rings is avoided. At the same time, the slidable sliding sleeve 5 is matched with the elastic valve ball spring 7, improving the buffering ability of the one-way valve for high-pressure fluids.
[0061] For this high-temperature and high-pressure one-way valve, by arranging a detection hole 13 in the bottom groove 12 of the threaded hole, the purpose of detecting the sealing performance is achieved.
[0062] This high-temperature and high-pressure one-way valve is configured such that the valve sleeve 3 is a composite body composed of an upper valve sleeve 31 and a lower valve sleeve 33. The upper valve sleeve 31 and the lower valve sleeve 33 are elastically connected by an intermediate spring 32. On the one hand, the elasticity of the intermediate spring 32 is utilized to increase the pressing force on both sides of the upper valve seat 2 and the valve sleeve 3. On the other hand, the thickness of the valve sleeve 3 becomes adjustable, enabling it to fit more closely when connected to the connector 8.
[0063] In this high-temperature and high-pressure one-way valve, the valve sleeve 3 is combined with the sliding sleeve 5. When the fluid flows from the upper valve seat 2 to the lower valve seat 4, the high-pressure fluid enters the gap between the upper valve sleeve 31 and the lower valve sleeve 33 through the side slot holes 51. Under the action of the fluid pressure, the squeezing force of the upper valve sleeve 31 and the lower valve sleeve 33 towards both sides is increased, thereby improving the sealing performance.
[0064] In this high-temperature and high-pressure one-way valve, a lifting partition 34 is further provided inside the valve sleeve 3. The lifting partition 34 divides the space between the upper valve sleeve 31 and the lower valve sleeve 33 into an inner cavity 301 and an outer cavity 302, preventing the fluid from eroding the intermediate spring 32. At the same time, by detecting the position of the lifting partition 34, the displacement of the upper valve sleeve 31 and the lower valve sleeve 33 can be judged to determine whether the connection is loose. Also, the pressure changes in the upper stepped cavity 303 and the lower stepped cavity 304 can be detected to determine whether the sealing structure of the upper valve sleeve 31 and the lower valve sleeve 33 leaks.
[0065] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.
[0066] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A one-way valve resistant to high temperature and high pressure, characterized in that, It includes a connector (1), in which an upper valve seat (2), a valve sleeve (3) and a lower valve seat (4) are successively arranged from top to bottom. Both the upper valve seat (2) and the lower valve seat (4) have a flat end and an inclined end. The upper inclined surface of the upper valve seat (2) is in line contact sealing with the end face of the stepped hole on the connector (1). Both ends of the valve sleeve (3) have a structure with a flat center and an inclined outer side. The contact surfaces between the valve sleeve (3) and the upper valve seat (2), and between the valve sleeve (3) and the lower valve seat (4) are sealed by inclined surfaces and small contact surfaces. A sliding sleeve (5) slides in the valve sleeve (3). A valve ball (6) and a valve ball spring (7) are arranged in the sliding sleeve (5). One end of the valve ball spring (7) presses on the valve ball (6), and the other end abuts against the lower end face of the upper valve seat (2). The valve ball (6) abuts against the orifice of the lower valve seat (4). A side groove hole (51) is arranged on the side surface of the sliding sleeve (5).
2. The one-way valve resistant to high temperature and high pressure according to claim 1, characterized in that, The valve sleeve (3) is an integrally cast whole.
3. The one-way valve resistant to high temperature and high pressure according to claim 1, characterized in that, The valve sleeve (3) is a combined body composed of two parts, including an upper valve sleeve (31) and a lower valve sleeve (33). The upper valve sleeve (31) and the lower valve sleeve (33) are connected by an intermediate spring (32). When the sliding sleeve (5) slides to the highest point and the lowest point, it can cover the gap between the upper valve sleeve (31) and the intermediate spring (32). The upper surface of the upper valve sleeve (31) and the lower surface of the lower valve sleeve (33) have a structure with a flat center and an inclined outer side.
4. A one-way valve resistant to high temperature and high pressure according to any one of claims 2 or 3, characterized in that A stepped inner hole is arranged in the sliding sleeve (5). The valve ball (6) fits on the inner wall of the inner hole of the sliding sleeve (5). The stepped inner hole is used to limit the sliding range of the valve ball (6). When water flows from the upper valve seat (2) to the lower valve seat (4), the valve ball (6) blocks the orifice of the lower valve seat (4) to block the water flow. When water flows from the lower valve seat (4) to the upper valve seat (2), under the action of water pressure, the valve ball (6) slides upward to compress the valve ball spring (7), and the water flow passes through the side groove hole (51) and flows upward.
5. A one-way valve resistant to high temperature and high pressure according to any one of claims 2 or 3, characterized in that One end of the connector (1) away from the lower valve seat (4) is provided with a threaded hole (11) with an internal thread. A threaded hole bottom groove (12) is arranged at the bottom of the threaded hole (11). A detection hole (13) is arranged on the threaded hole bottom groove (12). The detection hole (13) is used to detect leakage.
6. The one-way valve resistant to high temperature and high pressure according to claim 5, characterized in that, The threaded hole (11) is used to install an ultra-high pressure pipeline (92). A pipeline joint (91) is fixed on the outer side of the ultra-high pressure pipeline (92). The outer side of the pipeline joint (91) is threadedly connected with the inner side of the threaded hole (11).
7. The one-way valve resistant to high temperature and high pressure according to claim 6, characterized in that, A gas pressure sensor is arranged in the detection hole (13). When high-pressure gas leaks between the ultra-high pressure pipeline (92) and the inner hole of the connector (1), the gas pressure sensor in the detection hole (13) detects an increase in pressure and issues an alarm.
8. A one-way valve resistant to high temperature and high pressure according to any one of claims 2 or 3, characterized in that, One end of the connector (1) close to the lower valve seat (4) is provided with an external thread for fixing a connector (8). The lower inclined surface of the lower valve seat (4) is in line contact sealing with the end face of the stepped hole on the connector (8).
9. The one-way valve resistant to high temperature and high pressure according to claim 3, characterized in that, The upper valve sleeve (31) and the middle spring (32) are respectively provided with an upper sliding groove (311) and a lower sliding groove (331) at corresponding positions. An elevating partition plate (34) is further arranged inside the lower valve sleeve (33). The elevating partition plate (34) is in the shape of an annular sleeve. The top of the elevating partition plate (34) slides inside the upper sliding groove (311), and the bottom of the elevating partition plate (34) slides inside the lower sliding groove (331). The elevating partition plate (34) divides the cavity between the upper valve sleeve (31) and the middle spring (32) into an inner cavity (301) close to the sliding sleeve (5) and an outer cavity (302) away from the sliding sleeve (5). The middle spring (32) is arranged inside the outer cavity (302) so as to reduce the erosion of the middle spring (32) by the fluid.
10. A one-way valve resistant to high temperature and high pressure according to claim 9, characterized in that, A position sensor is arranged on the elevating partition plate (34). A magnet is fixed on one side of the elevating partition plate (34) in the outer cavity (302). A Hall element is fixed on the outer side of the connecting body (1) for detecting the position of the elevating partition plate (34), so as to judge whether looseness occurs inside the valve body. An upper ventilation hole (312) is arranged above the upper sliding groove (311) and penetrates through the upper valve sleeve (31). A ventilation hole (332) is arranged below the lower sliding groove (331) and penetrates through the lower valve sleeve (33). Since the connection between the upper part of the upper valve sleeve (31) and the lower part of the lower valve sleeve (33) is a bevel surface, an upper stepped cavity (303) and a lower stepped cavity (304) are respectively formed at the connection between the upper part of the upper valve sleeve (31) and the upper valve seat (2) and at the connection between the lower part of the lower valve sleeve (33) and the lower valve seat (4). The upper sliding groove (311) communicates with the upper stepped cavity (303) through the upper ventilation hole (312), and the lower sliding groove (331) communicates with the lower stepped cavity (304) through the ventilation hole (332). The sealing conditions of the upper stepped cavity (303) and the lower stepped cavity (304) can be judged by the position of the elevating partition plate (34).