Integrated optimized flow guide check valve for gas storage

Abstract

According to the integrated optimized flow guide check valve for the gas storage, the front end of a guide column (10) is in threaded connection with a middle hole of a boss in the middle of the rear side of a valve clack (8), the guide column (10) is sleeved with a guide sleeve (15), the front end of the guide sleeve (15) is sleeved with a spring (9), and the guide sleeve (15) is fixed to a supporting structure in the middle of a flow guide cover (101) integrally formed in an inner cavity of a valve body (1); the axial flow type structure and the flow guide cover arranged in the valve body are integrally cast and formed, the valve seat is of a Venturi type structural design, the flow resistance is small, and the flow state is good. The acting force of fluid acting on the valve clack is enhanced, the minimum opening speed is reduced, and it is guaranteed that the valve clack is rapidly opened and closed; the valve clack is flexible to open and close, stopping and reverse flowing of fluid can be achieved under the small pressure difference, and the sealing effect is good. Due to the streamline design and the effect of the buffering and damping spring, noise and vibration generated in the opening and closing process of the valve are small. No impact exists, dynamic response is fast, pressure loss is small, noise is low, and sealing performance is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of one-way valves classified as IPC F16K 15 / 00, and in particular relates to a structural improvement technology of an integrated axial flow check valve applied to a gas storage environment with optimized flow guidance. Background Art

[0002] Valves are essential for the safe and stable operation of the high-pressure, high-flow gas delivery system of gas storage. The gas storage check valve is a valve designed specifically for gas storage. Its main function is to prevent gas backflow and ensure the one-way flow of gas in the gas storage. Its function is to prevent gas backflow and ensure the safe and stable operation of the gas storage. Gas storage check valves are mainly used in natural gas storage, underground gas storage facilities and other occasions.

[0003] The working principle of the gas storage check valve is mainly based on the pressure difference of the fluid. When the gas flows forward, the valve disc automatically opens under the action of the fluid pressure, allowing the gas to pass through. When the gas flows backward, the valve disc will close under the combined action of the fluid pressure and the spring, thereby cutting off the reverse flow of the gas.

[0004] Axial flow check valve is a valve used to control the one-way flow of fluid. Its working principle is to open or close the valve through the pressure difference of the fluid. When the pressure of the fluid exceeds the opening pressure of the valve, the valve automatically opens and the fluid can pass smoothly; when the pressure of the fluid is lower than the closing pressure of the valve, the valve automatically closes to prevent the fluid from flowing back. Axial flow check valve is one of them. It has the characteristics of energy saving, good sealing performance, simple installation and operation, short opening and closing stroke, compact structure, and long service life. It is widely used to prevent the backflow of media.

[0005] Axial flow check valves are generally required to be able to open the valve under extremely low pressure differentials, and the lower the opening pressure, the better. The design and selection of springs is very critical. Opening the valve mainly requires overcoming the resistance of the spring that produces the initial sealing pressure, so the stiffness of the spring cannot be too large. The lower the spring stiffness, the lower the opening pressure; but low spring stiffness may make it difficult to establish the initial seal when closing, resulting in leakage.

[0006] Patent application 92209044.0 discloses a diversion check valve, including a valve body, a valve seat, a valve disc, a guide sleeve, a diversion tube, and a spring. The valve disc and the valve seat are conical sealing surfaces, and the outer surface of the diversion tube and the inner surface of the valve body form a diversion space.

[0007] Patent application 202110541244.0 discloses a flow-diverting built-in check valve, including a steam trap body, the water inlet end of the steam trap body is connected to a water inlet cylinder, and a circular boss is arranged in the middle of the inner circumference of the water inlet cylinder, and a fixing screw hole is threadedly opened on the boss of the water inlet cylinder, and an internal thread is opened on the inner circumference of the water inlet cylinder, and also includes a check valve body, the check valve body includes a water guide cylinder, an assembly cylinder, a flow disturbing structure, a flow stopping structure and a diversion structure, and the water guide cylinder is installed in the water inlet cylinder of the steam trap body.

[0008] Axial flow check valve technology is constantly being improved, especially in reducing flow resistance, improving flow patterns, and optimizing the force of the fluid on the valve disc, which still requires continued research and development. Utility Model Content

[0009] The technical problem to be solved by the utility model is to propose an integrated optimized flow-guiding check valve for gas storage. The flow-guiding structure of the valve is optimized to guide the gas to flow more smoothly, reduce the formation of turbulence and eddy currents, and thus reduce fluid resistance and energy consumption.

[0010] To this end, the utility model includes: a valve body, a valve seat, a stud, an anti-rotation plate, a valve disc and a guide column. The outer wall sleeve of the valve seat with a through hole in the middle is fixed on the inner wall of the front end of the valve body; a guide cover is fixedly arranged in the middle of the inner cavity of the valve body, and a local connection structure is provided between the outer wall of the guide cover and the inner wall of the valve body at the corresponding position, and an axial through hole with two small ends and a hollow middle is provided inside the guide cover. In addition, a hollow support structure with an axial hole is provided in the middle of the guide cover; the front end of the guide column is screwed with the middle hole of the middle boss of the rear side of the valve disc, the guide sleeve is sleeved outside the guide column, the guide column is slidably inserted in the guide sleeve, the front end of the guide sleeve is connected with a spring, the front end of the spring is sleeved outside the middle boss of the rear side of the valve disc, and the guide sleeve is fixed on the support structure of the middle part of the guide cover formed integrally in the inner cavity of the valve body. Under the action of the spring, the front end of the guide column pushes the valve disc to move between the rear port of the valve seat and the front port of the guide cover; the rear edge of the valve disc is hinged on the guide sleeve through the stud and the anti-rotation plate.

[0011] Among them, the middle section of the valve body has an arc-shaped convex inner wall, and the outer diameter of the outer wall of the middle and rear sections of the deflector gradually decreases; the gap between the outer wall of the deflector and the inner wall of the valve body at the corresponding position gradually increases from front to back.

[0012] The outer edge of the valve flap and the front port of the deflector cover have a snap-fitting structure.

[0013] The outer wall of the air deflector has a water drop shape.

[0014] The rear port of the air deflector is threadedly connected with a screw plug.

[0015] Furthermore, in order to achieve the above-mentioned purpose, the present invention is configured as follows:

[0016] In particular, a stud is fixed on the rear edge of the valve disc, and a second bolt is fixed on the front end surface of the shaft hole of the supporting structure in the deflector; a Z-shaped anti-rotation plate is slidably connected between the stud and the second bolt.

[0017] In particular, the inner wall of the through hole of the valve seat through-axis section is a hyperbolic structure, that is, the inner diameter of the inner wall in the middle of the valve seat is smaller than the inner diameters of the front and rear ports, and the inner diameter of the rear end of the valve seat through hole is not larger than the outer diameter of the valve disc.

[0018] In particular, the connection between the rear port edge surface of the valve seat and the inner wall of the valve body is smoothly transitioned.

[0019] In particular, shaft sleeves for reducing wear are provided at the front and rear ends of the guide column.

[0020] In particular, two lifting ears are symmetrically arranged in the middle of the top surface of the valve body.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The valve body is cast in one piece with an axial flow structure and a built-in guide cover. The valve seat adopts a Venturi structure design, which has small flow resistance and good flow state. The force of the fluid on the valve disc is strengthened, and the valve can be opened at the minimum flow rate. The minimum opening speed is reduced to ensure that the valve disc opens and closes quickly. The valve disc is flexible in opening and closing, and can stop and reverse the flow of the fluid under a small pressure difference, and has a good sealing effect. Due to the streamlined design and the effect of the buffer shock-absorbing spring, the valve generates less noise and vibration during the opening and closing process. The valve disc has high strength and light weight, which reduces the impact force on the valve seat and reduces the leakage point. It minimizes the water hammer effect in the fluid system and the pressure loss in the pipeline system. It has no impact, fast dynamic response, small pressure loss, low noise and good sealing performance. It is flexible in opening and closing, has good sealing, and is easy to maintain and clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings are for illustration only and should not be construed as limiting the present invention in any way. By referring to the following drawings, readers can understand the embodiments of the present invention and further understand the advantages and technical features of the present invention.

[0024] Figure 1 This is a schematic structural diagram of Example 1 of the utility model.

[0025] Figure 2 for Figure 1 Schematic diagram of the local structure of part I.

[0026] Figure 3 for Figure 1 Schematic diagram of the local structure of part II.

[0027] Reference numerals include:

[0028] 1-valve body, 2-valve seat, 3-fastening screw, 4-retaining ring, 5-o-ring, 6-stud, 7-anti-rotation plate, 8-valve disc, 9-spring, 10-guide column, 11-first bolt, 12-first gasket, 13-second bolt, 14-second gasket, 15-guide sleeve, 16-lifting ear, 17-screw plug; 101-flow deflector. DETAILED DESCRIPTION

[0029] It should be noted that:

[0030] The terms "comprise", "comprises", "having" and any variations thereof are intended to cover other possible options under the same logic that are not listed. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or apparatus.

[0031] In the description of the present utility model, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In order to enable those skilled in the art to better understand the scheme of the utility model, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only an embodiment of a part of the utility model, rather than all the embodiments.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by ordinary technicians in the field to which the utility model belongs. When there is a conflict, the definitions in this specification shall prevail.

[0035] The principle of the utility model is that the inner surface of the valve body 1, the guide cover 11, the valve disc 8 and other flow-passing surfaces are designed to be streamlined, so that the fluid on its surface mainly behaves as laminar flow, reducing the formation of turbulence and eddy currents, thereby reducing flow resistance and noise. The guide cover 101 is integrally designed inside the valve body 1. The guide cover 101 can cooperate with the valve disc 8 and the guide column 10 to axially move with the valve seat 2 to effectively guide the flow of the fluid, reduce fluid turbulence and energy loss, and improve the efficiency of the valve. The valve disc 8 is connected to the guide column and is equipped with a spring 9 for buffering and shock absorption. When the medium flows downstream, the spring 9 has a buffering effect, avoiding the impact vibration between the valve disc 8 and the valve body 1 when the ordinary check valve is opened. This can not only extend the service life of the valve, but also further reduce noise.

[0036] In the utility model, the static pressure of the working medium and the impulse of the fluid act together on the valve disc 8 to open or close the valve. When the flow direction of the medium is the same as that of the check valve, the valve opens and the medium passes through the flow channel of the valve body; when the flow direction of the medium is opposite to that of the check valve, the valve closes to prevent the medium from flowing back. It is widely used in the fields of petroleum, chemical industry, electric power, water supply, etc. In particular, in occasions where it is necessary to prevent the medium from flowing back, such as chemical fluid control in petrochemical plants and preventing water backflow in water supply systems, this valve plays an important role.

[0037] The utility model comprises: a valve body 1, a valve seat 2, a stud 6, an anti-rotation plate 7, a valve flap 8 and a guide column 10.

[0038] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0039] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

[0040] The content of the present invention can be more easily understood by selecting the following preferred implementation methods and embodiments of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by ordinary technicians in the field to which the present invention belongs. When there is a conflict, the definition in this specification shall prevail.

[0041] Embodiment 1: As attached Figure 1 , 2 As shown in Figure 3, the outer wall sleeve of the valve seat 2 with a through hole in the middle is fixed on the inner wall of the front end of the valve body 1; the middle of the inner cavity of the valve body 1 is fixedly provided with a guide cover 101, and there is a local connection structure between the outer wall of the guide cover 101 and the inner wall of the valve body 1 at the corresponding position, and the guide cover 101 has an axial through hole with two small ends and a hollow middle. In addition, a hollow support structure with an axial hole is arranged concentrically in the middle of the guide cover 101; the front end of the guide column 10 is screwed with the hole in the middle boss of the rear side of the valve disc 8, and the guide sleeve 15 is sleeved on the outside of the guide column 10, and the guide column 10 is slidably inserted in the guide sleeve 15, and the front end of the guide sleeve 15 is connected to the spring 9, and the front end of the spring 9 is sleeved on the outside of the middle boss of the rear side of the valve disc 8, and the guide sleeve 15 is fixed on the support structure in the middle of the guide cover 101 formed integrally in the inner cavity of the valve body 1. Under the action of the spring 9, the front end of the guide column 10 pushes the valve disc 8 to move between the rear port of the valve seat 2 and the front port of the guide cover 101; the rear edge of the valve disc 8 is hinged on the guide sleeve 15 through the stud 6 and the anti-rotation plate 7.

[0042] In the above, the middle section of the valve body 1 has an arc-shaped convex inner wall, and the outer diameter of the outer wall of the middle and rear sections of the air deflector 101 gradually decreases; the gap between the outer wall of the air deflector 101 and the inner wall of the valve body 1 at the corresponding position gradually increases from front to back.

[0043] In the above description, the outer edge of the valve flap 8 and the front end of the air guide cover 101 have a snap-fitting structure.

[0044] In the foregoing, the outer wall of the air deflector 101 has a water drop shape.

[0045] In the above description, the rear port of the air deflector 101 is threadedly connected to the screw plug 17 .

[0046] In the above, the stud 6 is fixed to the rear edge of the valve disc 8, and the second bolt 13 is fixed to the front end surface of the support structure shaft hole in the deflector 101; the Z-shaped anti-rotation plate 7 is slidably connected between the stud 6 and the second bolt 13. When the front water pressure is too large or an abnormal situation occurs, the front end of the anti-rotation plate 7 supports the rear edge of the valve disc 8, so that it will not be stuck in the front port of the deflector 101 due to excessive deformation and cannot automatically return to its original position under the action of tension.

[0047] In the above, the inner wall of the through hole of the valve seat 2 in the axial section is a hyperbolic structure, that is, the inner diameter of the middle inner wall of the valve seat 2 is smaller than the inner diameters of the front and rear ports, and the inner diameter of the rear end of the through hole of the valve seat 2 is not larger than the outer diameter of the valve disc 8.

[0048] In the above description, the connection between the rear port edge of the valve seat 2 and the inner wall of the valve body 1 is smoothly transitioned.

[0049] Preferably, the guide column 10 is provided with bushings at the front and rear ends for reducing wear.

[0050] In the embodiment of the utility model, the guide column 10 has high surface precision and good rigidity, reduces friction and bending, and cooperates precisely with the guide sleeve 15 to reduce the swing of the valve disc 8; further, the overall shape of the guide cover 101 is drop-shaped, and together with the inner wall of the valve body 1 forms a smooth transition flow channel, reduces eddy currents, and reduces flow resistance.

[0051] In the embodiment of the utility model, the front end outer wall of the valve seat 2 is fixed to the front end inner wall of the valve body 1 by means of a set screw 3; the guide sleeve 15 is fixed to the supporting structure in the middle of the deflector 101 by means of a second bolt 13 and a second washer 14, and the positioning is precise, effectively preventing the guide sleeve from loosening.

[0052] In the embodiment of the utility model, further, the stud 6 cooperates with the anti-rotation plate 7 to prevent the valve flap 8 from flipping over, so that the valve flap 8 and the valve seat 2 cooperate better to ensure effective sealing; the spring 9 has a short stroke and can be closed quickly; it can be customized according to working conditions or customer requirements, and different materials and sizes can be selected to meet the use requirements.

[0053] In the embodiment of the utility model, preferably, the length of the guide column 10 is not greater than the length of the guide cover 101. A sealing structure is provided at the front connection point of the guide column 10 on the rear side of the valve disc 8 and the front end surface of the guide sleeve 15. An annular friction sealing joint surface is provided at the conical edge of the inner wall of the rear end of the valve seat 2 and the corresponding edge of the front end surface of the valve disc 8, respectively, to enhance the sealing effect.

[0054] In the embodiment of the utility model, the middle part of the inner cavity of the valve body 1 is integrally formed with a flow guide hood 101, which has a reasonable structure, precise shape and structure, and a tight fit. The valve can be maintained by replacing the valve flap 8 and the screw plug 17. The overall design structure of the valve is balanced, and the center of gravity is consistent with the geometric center. Two lifting ears 16 are symmetrically arranged in the middle of the top surface of the valve body 1. The lifting ears 16 can be used to facilitate the transportation and hoisting operations. Moreover, by replacing the screw plugs 17 with different inner diameters, the valve opening and closing and sealing parameters can be adjusted to a certain extent and range.

[0055] Although the sealing performance of this embodiment is good, there may be a certain gap inside after long-term use, resulting in an increased risk of leakage. Therefore, regular inspection and maintenance are required to ensure its stable performance.

[0056] Based on the above embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention, so as to avoid exhaustively listing all implementation methods that are unnecessary and impossible to list comprehensively.

Claims

1. A gas storage integrated optimized flow diversion check valve, comprising a valve body (1), a valve seat (2), a stud (6), an anti-rotation plate (7), a valve flap (8) and a guide column (10); characterized in that: The outer wall of the valve seat (2) with a through hole in the middle is fixed to the inner wall of the front end of the valve body (1); a guide cover (101) is fixedly arranged in the middle of the inner cavity of the valve body (1); a local connection structure is provided between the outer wall of the guide cover (101) and the inner wall of the valve body (1) at a corresponding position; the guide cover (101) has an axial through hole with two small ends and a hollow middle; and a hollow support structure with an axial hole is arranged concentrically in the middle of the guide cover (101); the front end of the guide column (10) is screwed to the middle hole of the middle boss on the rear side of the valve disc (8); a guide sleeve (15) is sleeved on the outside of the guide column (10); The column (10) is slidably inserted in the guide sleeve (15), the front end of the guide sleeve (15) is externally connected to the spring (9), the front end of the spring (9) is sleeved outside the middle boss of the rear side of the valve disc (8), and the guide sleeve (15) is fixed on the supporting structure in the middle of the guide cover (101) integrally formed in the inner cavity of the valve body (1); under the action of the spring (9), the front end of the guide column (10) pushes the valve disc (8) to move between the rear port of the valve seat (2) and the front port of the guide cover (101); the rear edge of the valve disc (8) is hinged on the guide sleeve (15) through the stud (6) and the anti-rotation plate (7).

2. The integrated optimized flow diversion check valve for gas storage according to claim 1 is characterized in that: The middle section of the valve body (1) has an arc-shaped convex inner wall, and the outer diameter of the outer wall of the middle and rear sections of the deflector (101) gradually decreases; the gap between the outer wall of the deflector (101) and the inner wall of the valve body (1) at the corresponding position gradually increases from front to back.

3. The integrated optimized flow diversion check valve for gas storage according to claim 1 is characterized in that: The outer edge of the valve flap (8) and the front end of the air guide cover (101) have a snap-fitting structure.

4. The integrated optimized flow diversion check valve for gas storage according to claim 1 is characterized in that: The outer wall of the deflector (101) has a water drop shape.

5. The integrated optimized flow diversion check valve for gas storage according to claim 1 is characterized in that: The rear port of the air deflector (101) is threadedly connected to the screw plug (17).

6. The integrated optimized flow diversion check valve for gas storage according to claim 1 is characterized in that: A stud (6) is fixed on the rear edge of the valve disc (8), and a second bolt (13) is fixed on the front end surface of the shaft hole of the supporting structure in the deflector (101); a Z-shaped anti-rotation plate (7) is slidably connected between the stud (6) and the second bolt (13).

7. The integrated optimized flow diversion check valve for gas storage according to claim 1 is characterized in that: The inner wall of the through hole of the valve seat (2) in the cross-axial section is a hyperbolic structure, that is, the inner diameter of the inner wall in the middle of the valve seat (2) is smaller than the inner diameters of the front and rear ports, and the inner diameter of the rear end of the through hole of the valve seat (2) is not larger than the outer diameter of the valve disc (8).

8. The integrated optimized flow diversion check valve for gas storage according to claim 1 is characterized in that: The connection between the rear port edge surface of the valve seat (2) and the inner wall of the valve body (1) is smoothly transitioned.

9. The integrated optimized flow diversion check valve for gas storage according to claim 1, characterized in that: Two lifting ears are symmetrically arranged in the middle of the top surface of the valve body.

10. The integrated optimized flow diversion check valve for gas storage according to claim 1, characterized in that: The front and rear ends of the guide column (10) are provided with shaft sleeves for reducing wear.

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