A reversible flow valve with shut-off function

Abstract

This utility model discloses a reversible one-way valve with a shut-off function, comprising a valve core, a valve stem sealing body, and a valve stem with a handle. The valve core is a hollow sphere with a valve core through hole at one end and a one-way blocking tube and a one-way valve plate installed in the hollow sphere cavity at the other end. The one-way valve plate rests on the inclined surface of the inner opening of the one-way blocking tube. The one-way blocking tube and the valve core through hole are concentric with the left and right channels in the left and right valve bodies, respectively. The valve stem passes through the valve stem sealing body and connects to the valve core installed in the left and right valve bodies. The left and right valve bodies are connected by connecting bolts, and an indicator arrow is provided on the handle. This invention solves the defects of existing reversible one-way valves, such as numerous valve core components, complex structure, easy damage, and difficulty in maintenance. It can be applied in petroleum, petrochemical, pipeline transportation, water supply and drainage, and other industries, bringing great convenience to the flow direction regulation of fluids in process pipelines or pipelines in these industries.

Description

Technical Field

[0001] This utility model relates to a control valve for fluid flow direction, specifically a reversible single-flow valve with a shut-off function. Background Technology

[0002] In the petroleum, petrochemical, pipeline transportation, water supply and drainage and other industries, check valves are the most common type of valve in liquid and gas transportation systems. A check valve is a valve that allows fluid or gas to flow only in a specified direction and prevents backflow. It prevents fluid or gas from flowing backward in the system and is commonly known as a one-way valve, check valve or non-return valve.

[0003] In oil, petrochemical, and pipeline transportation processes, check valves are used to ensure unidirectional flow of liquids or gases. However, in certain situations, such as pipeline perforation or process switching, it is necessary to adjust the flow direction of liquids or gases in the pipeline. Because the check valves currently used in the field cannot adjust the flow direction, this causes the aforementioned construction difficulties and fails to meet the requirements of on-site construction.

[0004] To adjust the flow direction of liquid or gas, the current methods are as follows: 1. Disassemble the check valve installed in the conveying process, remove the valve core from the check valve to disable it, turning it into a normal pipeline in the process, and change the flow direction by opening and closing the shut-off valve in the process; 2. Reverse the installation of the check valve to change the flow direction of the conveyed medium; 3. Remove the check valve, modify it with a short pipe, and change the flow direction of the conveyed medium in the process by opening and closing the shut-off valve in the process.

[0005] However, using the above methods during construction is not only time-consuming and labor-intensive, but also requires shutting down and emptying the entire process before implementation. This not only delays production but also wastes the medium being transported in the process. If the medium being transported in the pipeline is a toxic or harmful production material such as petroleum or natural gas, it will also cause environmental pollution.

[0006] To solve the above problems, the managers and technicians on the production site have done a lot of work, resulting in the following related patented technologies.

[0007] Patent application CN201821634495.3 discloses a reversible one-way flow check valve, which includes a left valve body, a middle valve body, and a right valve body. The left, middle, and right valve bodies are fixedly installed together from left to right. Each of the three valve bodies has a connected horizontal through-hole. A valve core ball is fitted inside the horizontal through-hole of the middle valve body. A retaining spring is fixedly installed on the inner side of the left end of the valve core ball, and a retaining plate is integrally fixed on the inner side of the right part of the valve core ball. A left baffle and a right baffle are installed at intervals from left to right on the inner side of the valve core ball between the retaining spring and the retaining plate. There is a gap between the right baffle and the inner wall of the valve core ball. This utility model has a reasonable and compact structure. Through the coordinated use of the left valve body, middle valve body, right valve body, valve core ball, left baffle, right baffle, and compression spring, it achieves the purpose of reversing and one-way check.

[0008] However, the above-mentioned device still has the following drawbacks: While it can achieve reversible unidirectional flow check, its intermediate valve core ball has a complex internal structure with many components, contains springs, is prone to jamming, and is difficult to install and maintain.

[0009] The one-way valve disclosed in patent application CN201710209701.X includes a tubular body, within which a valve seat and a valve core are disposed. The valve core is plate-shaped and covers the central hole of the valve seat, and is hinged to a first side of the valve seat. A driving device is connected to the valve seat, which drives the valve seat to rotate, causing the valve core to move from one end of the tubular body towards the other. The one-way valve provided by this invention, by connecting the valve seat to the driving device and driving the valve seat to rotate, thereby causing the valve core to move from one end of the tubular body towards the other, effectively improves the flexibility of the one-way valve, allowing on-site personnel to adjust the inlet orientation of the one-way valve at any time according to the actual needs of the working conditions.

[0010] However, although the above-mentioned device can theoretically adjust the inlet orientation of the one-way valve at any time, it is a tubular structure and does not provide space for the valve core to turn. The valve core must be in the closed state when the device turns, which limits the flexibility of the device. Moreover, the connection method of the valve core hinge is relatively complex, easy to be damaged, and difficult to repair.

[0011] In summary, although current flow valves come in a variety of structures, they generally suffer from drawbacks such as limited functionality, difficulty in maintenance, and inconvenience in use, and still require improvement. Summary of the Invention

[0012] This invention provides a reversible check valve with a shut-off function, which has a simple structure, is easy to disassemble and maintain, and allows for adjustment of the flow control direction as needed. This improves the efficiency of fluid direction switching in the conveying process, reduces the workload of on-site workers, minimizes unnecessary losses of production materials or output due to process venting, and enhances economic benefits.

[0013] The technical solution of this utility model is as follows: A reversible one-way valve with a shut-off function includes a valve core, a valve stem sealing body, and a valve stem with a handle, wherein: the valve core is a hollow sphere with a valve core through hole at one end and a one-way blocking tube and a one-way valve plate installed in the hollow sphere cavity at the other end; the one-way valve plate rests on the inclined surface of the inner opening of the one-way blocking tube; the one-way blocking tube and the valve core through hole are concentric with the left and right channels in the left and right valve bodies; the valve stem passes through the valve stem sealing body and is connected to the valve core installed in the left and right valve bodies; the left and right valve bodies are connected by connecting bolts, and an indicator arrow is provided on the handle.

[0014] Preferably, the one-way barrier tube is a short tube with an inner diameter smaller than that of the valve core through hole and installed inward in the valve core ball cavity, and the inclined surface of the inner end of the one-way barrier tube is a precision-machined sealing surface.

[0015] Preferably, the length of the upper part of the one-way barrier tube extending inward from the valve core side is set to 2cm-4cm; the inclination angle of the inner opening of the one-way barrier tube in the valve core is set to 8 degrees-20 degrees.

[0016] Preferably, an upward-facing arc-shaped bearing is welded to the middle position of the outer side of the upper end of the unidirectional barrier tube, and the arc-shaped bearing is connected to the valve plate shaft. The two ends of the valve plate shaft are connected to the lugs at both ends of the unidirectional valve plate.

[0017] Preferably, the lower end of the valve stem is provided with a connecting protrusion, which can be inserted into the connecting groove provided on the upper outer side of the valve core ball.

[0018] Preferably, the connecting surfaces of the left valve body and the right valve body at one end are stepped surfaces that meet each other and are respectively provided with a left valve body connecting flange and a right valve body connecting flange. A sealing element is installed between the stepped surfaces of the left valve body and the right valve body. Connecting bolts are installed in the bolt holes of the left valve body connecting flange and the right valve body connecting flange.

[0019] Preferably, the inner cavity of the valve body at the connection surface between the left and right valve bodies is a spherical inner cavity formed by mutual docking and capable of housing the valve core.

[0020] Preferably, the outer flanges of the non-connecting surfaces at the other ends of the left and right valve bodies are circular flanges, the same as those of pipe flanges or pipeline flanges; the left valve body, right valve body, valve core, valve stem, one-way barrier pipe, and one-way valve plate are made of stainless steel.

[0021] Preferably, the left valve body connecting flange and the right valve body connecting flange have a square structure or a square structure with arc corners.

[0022] Preferably, the indicator arrow is engraved or coated on the upper surface of the handle, or it can be both engraved and coated on the upper surface of the handle; the valve stem can also be connected to the output end of the electric actuator, and the upper part of the valve stem is a square prism or an octagonal prism with the indicator arrow on it; the power line and signal data line of the electric actuator are respectively connected to the power supply and RTU in the electrical control cabinet at the application site.

[0023] Compared with existing technologies, the significant advantages of this invention are as follows: This invention solves the defects of existing reversible check valves, such as numerous valve core components, complex structure, easy damage, and difficulty in maintenance. It provides a reversible check valve with adjustable flow direction, convenient operation, and multiple functions, applicable to petroleum, petrochemical, pipeline transportation, water supply and drainage, and other industries, greatly facilitating the flow direction adjustment of fluids in process pipelines or pipelines. Specifically, it improves existing check valves by giving them multiple functions, including switching the flow direction of fluids (including liquids or gases), unidirectional flow, fluid shut-off, and verification of the check valve's performance—a total of four functions. This invention maintains the unidirectional shut-off characteristic of the fluid while enabling on-the-spot switching of the fluid direction, thus both changing the fluid flow direction and maintaining unidirectional flow.

[0024] 2. One-way sealing is achieved by combining a built-in one-way barrier tube and a one-way valve plate, which is simple in structure and reliable in operation.

[0025] 3. The sealing effect of the check valve can be verified at any time. Simply turn the handle 90 degrees and observe the pressure in the pipeline or conduit through the pressure gauge to verify the sealing effect of the check valve.

[0026] 4. An indicator arrow is set at the top of the handle to avoid misjudgment and clearly determine the direction of fluid flow in the pipe or pipeline.

[0027] 5. In this utility model, the left and right channels formed by connecting the left and right valve bodies are direct current channels on the same center line. The valve core is a hollow spherical structure, which can reduce the probability of impurities in the fluid getting stuck in the valve core and valve body. It is made of corrosion-resistant materials such as stainless steel and is suitable for installation in oil and petrochemical pipelines or pipelines that transport oil containing particles and highly corrosive media.

[0028] 6. The valve body of this one-way valve consists of a left valve body and a right valve body that can be connected. At the same time, a valve body connection flange with a different shape from the pipeline or pipeline flange is designed. It is simple to assemble and easy to disassemble. It is different from the pipeline or pipeline flange, which can prevent accidental disassembly of the valve body.

[0029] 7. Using this invention in pipeline or pipeline processes can significantly reduce the number of process valve groups and valves used. In traditional conveying process setups, a process typically requires a gate valve and a check valve to be used in series. However, this check valve can simultaneously function as a gate valve, check valve, and directional valve, saving one gate valve. It also saves space and layout costs in the pipeline or pipeline process and reduces the risk of valve-related leaks.

[0030] 8. This utility model adopts a handle rotation direction, which is simple in structure and convenient and quick; alternatively, the handle can be removed and an electric actuator can be connected to the valve stem to change to an electric operation mode, which can be controlled remotely. 。

[0031] In summary, this utility model is convenient to use, has significant effects, can generate good economic benefits, and has great application and promotion value. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the appearance structure of this utility model.

[0033] Figure 2 This is a schematic diagram illustrating the structure and working principle of a fluid flowing to the right.

[0034] Figure 3 This is a schematic diagram of the connection structure between the valve stem, the valve core, and the single-flow valve disc within the valve core.

[0035] Figure 4 This is a schematic diagram illustrating the structure and working principle of the fluid when the valve core reverses direction and flows to the left.

[0036] Figure 5 This is a schematic diagram illustrating the working principle of this utility model when connected to an electric actuator.

[0037] In the diagram: 1. Left valve body; 2. Right valve body; 3. Valve core; 4. Left valve body connecting flange; 5. Right valve body connecting flange; 6. Connecting bolt; 7. Outer flange; 8. Valve stem seal; 9. Valve stem; 10. Handle; 11. Left channel; 12. Right channel; 13. One-way barrier pipe; 13-1. Inclined surface; 14. One-way valve plate; 15. Valve plate shaft; 16. Indicating arrow; 17. Connecting protrusion; 18. Connecting groove; 19. Valve core through hole; 20. Electric actuator. Detailed Implementation

[0038] The accompanying drawings are for reference and illustration only and are not intended to limit the scope of protection of this utility model. The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0040] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] See Figure 1 - Figure 5 A reversible one-way valve with a shut-off function includes a valve core 3, a valve stem sealing body 8, and a valve stem 9 with a handle 10. The valve core 3 is a hollow sphere with a valve core through-hole 19 at one end and a one-way blocking tube 13 and a one-way valve plate 14 installed in the hollow cavity at the other end. The one-way valve plate 14 rests on the inclined surface 13-1 of the inner opening of the one-way blocking tube 13. The one-way blocking tube 13 and the valve core through-hole 19 are concentric with the left channel 11 and right channel 12 in the left valve body 1 and right valve body 2, respectively. The valve stem 9 passes through the valve stem sealing body 8 and connects to the valve core 3 installed in the left valve body 1 and right valve body 2. The left valve body 1 and right valve body 2 are connected by connecting bolts 6. An indicator arrow 16 is provided on the handle 10. The valve stem sealing body 8 is prior art and will not be described in detail here.

[0042] This invention simplifies the structure of existing reversible flow valves, and its simplified structure and significant performance advantages are as follows: 1) The left valve body 1 and the right valve body 2 are connected by connecting bolts 6, making disassembly and assembly simple and convenient; 2) The compression spring, snap ring, left baffle, and right baffle in the prior art are replaced by a one-way barrier tube 13 and a one-way valve plate 14. In this utility model, the valve core 3 is a hollow sphere with a valve core through hole 19 at one end and a one-way barrier tube 13 and a one-way valve plate 14 installed in the spherical cavity at the other end. The one-way valve plate 14 rests on the inclined surface 13-1 of the inner opening of the one-way barrier tube 13. The one-way barrier tube 13 and the valve core through hole 19 are concentric with the left channel 11 and the right channel 12 in the left valve body 1 and the right valve body 2.

[0043] 3) By relying on the cooperation of the inclined surface 13-1 of the one-way barrier pipe 13 and the one-way valve plate 14, the incoming liquid or gas can be blocked or allowed to pass through. By rotating the handle 10 marked with the indicator arrow 16, the valve rod 9 connected to the valve core 3 can be rotated 180 degrees, which can easily change the flow direction of the fluid in the pipeline process using this utility model.

[0044] 4) If the valve core 3 is rotated 90 degrees by the valve stem 9 driven by the handle 10, the balls on both sides of the valve core 3 can block the left channel 11 and right channel 12 in the left valve body 1 and right valve body 2, which can also conveniently allow this utility model to completely cut off the fluid in the pipeline or pipeline transportation process and be used as a shut-off valve.

[0045] 5) When construction operations require adjusting the flow direction of liquids or gases in pipelines, No need to use again The method of removing the valve core of the check valve installed in the conveying process and reversing the check valve, or by removing the check valve, modifying the short pipe, and then installing the reverse check valve to change the flow direction of the conveying medium, is simple and convenient to construct, saves time and effort, and greatly reduces the workload and labor intensity of construction personnel.

[0046] 6) When using this utility model, it is no longer necessary to shut down and vent the entire process when changing the direction of fluid in a pipeline or pipeline flow. This not only improves construction efficiency but also avoids the waste of the transported medium in the process, effectively saving production materials and protecting the environment.

[0047] 7) This utility model is a single-flow valve that can easily change the direction of fluid and also a shut-off valve that can completely cut off the fluid, which can fully meet the requirements of on-site construction.

[0048] Based on the above embodiment one, the present invention also has the following embodiments: In a preferred embodiment, the one-way barrier tube 13 is a short tube with an inner diameter smaller than that of the valve core through hole 19 and installed inward in the ball cavity of the valve core 3. The inclined surface 13-1 of the inner opening of the one-way barrier tube 13 is a precision-machined sealing surface.

[0049] In a preferred embodiment, the length of the upper part of the one-way barrier tube 13 extending inward from one side of the valve core 3 is set to 2cm-4cm; the inclination angle of the inner opening of the one-way barrier tube 13 in the valve core 3 is set to 8 degrees-20 degrees.

[0050] In a preferred embodiment: an upward-opening arc-shaped bearing is welded to the middle of the outer surface of the upper end of the one-way barrier tube 13, and the bearing is connected to the valve disc shaft 15. The two ends of the valve disc shaft 15 are connected to the lugs at both ends of the one-way valve disc 14. The one-way valve disc 14, hooked onto the valve disc shaft 15, forms a seal by blocking the inclined surface 13-1 of the one-way barrier tube 13. See [link to previous embodiment]. Figure 2 or Figure 3 When fluid in the pipe or pipeline enters from the direction of overlap between the inclined plane 13-1 and the check valve 14, the check valve 14 is opened, allowing the fluid to pass through. See Figure 3 and Figure 4 When the valve stem 9 drives the valve core 3 to rotate 180 degrees through the handle 10, the fluid in the pipe or pipeline enters from the direction of the one-way valve plate 14 blocking the one-way barrier pipe 13. The one-way valve plate 14 blocks the opening of the one-way barrier pipe 13 and does not allow the fluid to pass through.

[0051] In a preferred embodiment, the lower end of the valve stem 9 is provided with a connecting protrusion 17, which can be inserted into the connecting groove 18 provided on the outer side of the upper end of the spherical body of the valve core 3. The valve core 3 is driven to rotate by the engagement of the connecting protrusion 17 and the connecting groove 18.

[0052] In a preferred embodiment: the connecting surfaces of the left valve body 1 and the right valve body 2 at one end are mutually mating stepped surfaces, and are respectively provided with a left valve body connecting flange 4 and a right valve body connecting flange 5. A sealing element is installed between the stepped surfaces of the left valve body 1 and the right valve body 2 to ensure the sealing performance of the check valve; connecting bolts 6 are installed in the bolt holes of the left valve body connecting flange 4 and the right valve body connecting flange 5, so that the left valve body 1 and the right valve body 2 are connected by the connecting bolts 6.

[0053] In a preferred embodiment, the inner cavity of the valve body at the connection surface between the left valve body 1 and the right valve body 2 is a spherical inner cavity formed by mutual docking and capable of accommodating the valve core 3.

[0054] In a preferred embodiment: the outer flange 7 of the non-connecting surface at the other end of the left valve body 1 and the right valve body 2 is a circular flange, the same as the pipe flange or pipeline flange; the left valve body 1, the right valve body 2, the valve core 3, the valve stem 9, the one-way barrier pipe 13, and the one-way valve plate 14 are made of stainless steel and other corrosion-resistant materials.

[0055] In a preferred embodiment, the left valve body connecting flange 4 and the right valve body connecting flange 5 are square in shape or square in shape with rounded corners. This is mainly to distinguish them from the connecting flanges between pipes or pipelines and to prevent misoperation.

[0056] In a preferred embodiment, the indicator arrow 16 is either engraved or coated on the upper surface of the handle 10, or it can be both engraved and coated on the upper surface of the handle 10. Engraving and coating the indicator arrow 16 on the upper surface of the handle 10 is preferred; first, the indicator arrow 16 is engraved on the upper surface of the handle 10, and then a brightly colored pigment is applied to the engraved groove, making it durable and eye-catching. Alternatively, it can be directly engraved on the upper surface of the handle 10 or directly coated with paint. The valve stem 9 can also be connected to the output end of the electric actuator 20. The upper part of the valve stem 9 is a square or octagonal prism with the indicator arrow 16 on it. The power cord and signal data line of the electric actuator 20 are respectively connected to the power supply and RTU (Remote Terminal Unit) in the electrical control cabinet at the application site. The electric actuator 20 is equipped with a servo motor and data line, and can be remotely controlled, thus allowing remote adjustment of this utility model, control of the direction of fluid in the process, or throttling of fluid in the process. Electric actuators 20 can be customized from manufacturers or purchased online.

[0057] The embodiments described above are merely typical examples, but the present invention is not limited to these embodiments. Those skilled in the art can make modifications without departing from the spirit and teachings of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the inventive spirit and concept of the present invention should be included within the protection scope of the present invention. Therefore, the protection scope is not limited to the above description.

Claims

1. A reversible flow valve with a shut-off function, comprising a valve core, a valve stem sealing body, and a valve stem with a handle, characterized in that, The valve core is a hollow sphere with a valve core through hole at one end and a one-way barrier tube and a one-way valve plate installed in the hollow sphere cavity at the other end; the one-way valve plate rests on the inclined surface of the inner opening of the one-way barrier tube; the one-way barrier tube and the valve core through hole are concentric with the left and right channels in the left and right valve bodies; the valve stem passes through the valve stem seal and is connected to the valve core installed in the left and right valve bodies; the left and right valve bodies are connected by connecting bolts, and an indicator arrow is provided on the handle.

2. A reversible flow valve with a shut-off function as described in claim 1, characterized in that, The one-way barrier tube is a short tube with an inner diameter smaller than the valve core through hole and installed inward in the valve core ball cavity. The inclined surface of the inner opening of the one-way barrier tube is a precision-machined sealing surface.

3. A reversible flow valve with a shut-off function as described in claim 1 or 2, characterized in that, The length of the upper part of the one-way barrier tube extending inward from the valve core side is set to 2cm-4cm; the inclination angle of the inner opening of the one-way barrier tube in the valve core is set to 8 degrees-20 degrees.

4. A reversible flow valve with a shut-off function as described in claim 3, characterized in that, An upward-facing arc-shaped bearing seat is welded to the middle position of the outer side of the upper end of the unidirectional barrier tube, and the arc-shaped bearing seat is connected to the valve plate shaft. The two ends of the valve plate shaft are connected to the lugs at both ends of the unidirectional valve plate.

5. A reversible flow valve with a shut-off function as described in claim 4, characterized in that, The lower end of the valve stem is provided with a connecting protrusion, which can be inserted into the connecting groove provided on the upper outer side of the valve core spherical body.

6. A reversible flow valve with a shut-off function as described in claim 1, characterized in that, The connecting surfaces of the left and right valve bodies are stepped surfaces that meet each other, and are respectively provided with a left valve body connecting flange and a right valve body connecting flange. A sealing element is installed between the stepped surfaces of the left and right valve bodies. Connecting bolts are installed in the bolt holes of the left and right valve body connecting flanges.

7. A reversible flow valve with a shut-off function as described in claim 6, characterized in that, The inner cavity of the valve body at the connection surface between the left and right valve bodies is a spherical inner cavity formed by mutual docking and capable of housing the valve core.

8. A reversible flow valve with a shut-off function as described in claim 7, characterized in that, The outer flanges of the non-connecting surfaces at the other ends of the left and right valve bodies are circular flanges, the same as those of pipe flanges or pipeline flanges; the left valve body, right valve body, valve core, valve stem, one-way barrier pipe, and one-way valve plate are made of stainless steel.

9. A reversible flow valve with a shut-off function as described in claim 8, characterized in that, The left valve body connecting flange and the right valve body connecting flange are square in shape or square in shape with rounded corners.

10. A reversible flow valve with a shut-off function as described in claim 5, characterized in that, The indicator arrow is engraved or coated on the upper surface of the handle, or it can be engraved and then coated on the upper surface of the handle; the valve stem can also be connected to the output end of the electric actuator, and the upper part of the valve stem is a square prism or an octagonal prism with the indicator arrow on it; the power line and signal data line of the electric actuator are respectively connected to the power supply and RTU in the electrical control cabinet at the application site.

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