Swing check valve with pressure reduction function
By introducing a valve disc opening adjustment device and elastic buffer design into the swing check valve, the problem of valve disc impact under pressure fluctuation of the swing check valve is solved, and stable pressure output and noise reduction are achieved, and service life is extended. , integrates multi-functions.
Patent Information
- Application Number
- CN202411371202.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2024-12-27
AI Technical Summary
The swing check valve can easily cause the valve disc to repeatedly hit the valve body under pressure fluctuations, causing noise, and may cause damage to downstream pipelines and equipment.
A swing check valve with valve disc opening adjustment device is designed, including a piston cylinder, piston, adjustment rod and elastic member. Through the design of pressure chamber and pressure relief chamber, the valve disc opening is automatically adjusted to limit the Maximum pressure avoids damage to the pipeline and equipment by pressure fluctuations, and absorbs impact kinetic energy through elastic buffering to prevent the valve disc from colliding with the valve body.
It realizes buffering of the valve disc under pressure fluctuations, extends service life, reduces noise, and ensures the stable operation of downstream pipelines and equipment. It integrates check, pressure reduction and shock absorption functions, and improves the stability of the swing check valve. sex.
Smart Images
Figure CN119196358A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of valve technology, and more specifically, relates to a swing check valve with a pressure reducing function. Background Art
[0002] The swing check valve is also called a one-way valve or a non-return valve. The valve disc inside the valve body can rotate open or close by itself depending on the pressure formed by the fluid to prevent the fluid in the piping system from flowing back.
[0003] At present, due to the complex and changeable actual application status of the pipeline system, the pressure in the pipeline will change sharply when the water pump is started or the valve is quickly closed, causing pressure fluctuations. Since the valve disc of the swing check valve is more sensitive to pressure, the valve disc is prone to repeatedly hit the valve body under pressure fluctuations, causing noise and affecting the service life. In addition, when the pressure fluctuation is large, excessive pressure is also likely to damage the downstream pipeline and equipment of the swing check valve, affecting the stability of the pipeline system, so it is urgently needed to be improved. Summary of the invention
[0004] In response to the defects of the prior art or the need for improvement, the present application provides a swing check valve with a pressure reducing function, which aims to improve the problem that the valve disc of the swing check valve is prone to repeatedly hit the valve body under pressure fluctuations, and that excessive pressure is prone to damage the downstream pipelines and equipment of the swing check valve.
[0005] The present application provides a swing check valve with a pressure reducing function, which specifically comprises a valve body and a valve flap, wherein the valve flap is rotatably connected to the valve body and is used to open and close a valve seat opening of the valve body;
[0006] The valve body is provided with a valve flap opening adjustment device, which includes a piston cylinder, a piston, an adjustment rod and an elastic member. The piston cylinder is fixed to the valve body, and the piston is elastically supported in the piston cylinder through the elastic member, wherein:
[0007] The piston divides the inner cavity of the piston cylinder into a pressure cavity and a pressure relief cavity, the pressure cavity is connected to the inner cavity of the valve body, and the pressure relief cavity is connected to the outside atmosphere;
[0008] The regulating rod is connected to the piston, and the regulating rod extends through the pressure relief chamber and out of the piston cylinder, so as to be used for the valve disc in the open state to abut against and position;
[0009] The direction of pressure exerted by the fluid in the pressure chamber on the piston is opposite to the direction of the elastic force exerted by the elastic member on the piston. When the fluid pressure is greater than a threshold value, the fluid pressure can push the piston and the adjusting rod to move closer to the valve disc to adjust the valve disc opening; when the fluid pressure is less than the threshold value, the elastic member can push the piston and the adjusting rod to move away from the valve disc to cancel the restriction on the valve disc opening.
[0010] Through the above technical scheme conceived by the present application, compared with the prior art, the valve flap opening adjustment device of the swing check valve can automatically adjust the opening of the valve flap according to the fluid pressure in the valve, thereby limiting the maximum pressure at the valve body outlet and ensuring the stability of the pressure at the outlet, avoiding damage to the pipeline and equipment caused by excessive pressure after the valve; therefore, after the valve flap opening adjustment device automatically adjusts the opening of the valve flap according to the fluid pressure in the valve, the fluid flow rate at the valve body outlet is smoothly regulated and controlled, so that it can supply the downstream pipeline and equipment in a relatively constant and acceptable range, ensuring the stable and normal operation of the downstream pipeline and equipment.
[0011] In addition, under the opening adjustment action of the valve flap opening adjustment device, the valve flap, the adjusting rod and the piston can be displaced in coordination under pressure fluctuations, and the movable piston and the adjusting rod can form a buffer for the valve flap, which makes it difficult or even impossible for the valve flap to collide with the valve body, thereby protecting the valve body, making the valve body less likely to vibrate, reducing operating noise, and extending the service life of the valve body. The swing check valve integrates the functions of non-return, pressure reduction and shock absorption, and achieves the purpose of multiple uses of one valve while increasing the stability of traditional check valves.
[0012] As further preferred, the elastic member is a pressure spring arranged in the pressure relief chamber, one end of the pressure spring is in contact with or connected to the inner bottom wall of the pressure relief chamber, and the other end of the pressure spring is in contact with or connected to the end surface of the piston.
[0013] As a further preferred embodiment, an elastic buffer is installed in the pressure chamber, and the elastic buffer is used to absorb the impact kinetic energy transmitted from the valve disc to the piston when the fluid impacts the valve disc.
[0014] As a further preference, a detachable limiting member is installed at the communicating port of the pressure chamber, and the limiting member abuts against the elastic buffer member to restrict the elastic buffer member in the pressure relief chamber.
[0015] As a further preference, the piston cylinder is connected to a pressure relief pipe, one port of the pressure relief pipe is connected to the pressure relief chamber, and the other port of the pressure relief pipe is connected to the atmosphere outside the valve body.
[0016] As a further preference, the valve flap opening adjustment device further comprises a stop seat, which is rotatably arranged on the outer end of the adjustment rod, and the stop seat has a stop surface for positioning the valve flap.
[0017] As a further preference, a limiting structure is provided at the outer end of the adjusting rod, and the limiting structure is used to limit the rotation range of the stop seat so that the rotation angle of the stop surface is limited between 5 degrees and 30 degrees.
[0018] As a further preference, the limiting structure comprises two groups of limiting rods, and the two groups of limiting rods are respectively arranged on both sides of the stop seat, so that the rotatable range of the stop seat is located between the two groups of limiting rods.
[0019] As a further preferred embodiment, the middle portion of the valve body protrudes upward to form a valve neck, and the valve flap opening adjustment device is connected to the inside of the valve neck.
[0020] As a further preference, an inspection port is provided at the upper end of the valve neck, and an outer end cover of the inspection port is covered with a detachable valve cover.
[0021] In general, the above technical solutions conceived by this application have the following technical advantages compared with the prior art:
[0022] 1. This swing check valve integrates the functions of non-return, pressure reduction and shock absorption. By arranging a valve disc opening adjustment device in the valve body, the opening of the valve disc can be automatically adjusted according to the fluid pressure in the valve, so as to maintain the pressure at the outlet of the valve body within a stable range, avoiding damage to the pipeline and equipment caused by excessive pressure after the valve; at the same time, it can also form a buffer for the valve disc under pressure fluctuations, significantly extend the service life of the swing check valve, and reduce operating vibration and noise.
[0023] 2. During the use of the pipeline system, when a strong fluid impact occurs, the valve disc will first contact the stop plate, and then the stop plate will link the piston and the buffer spring to absorb the impact kinetic energy to prevent the valve disc from colliding with the valve body during the opening process, thereby protecting the valve body. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a cross-sectional view of a swing check valve with a pressure reducing function provided in an embodiment of the present application;
[0025] Figure 2 is a cross-sectional view of a valve flap opening adjustment device provided in an embodiment of the present application;
[0026] Figure 3 is an exploded view of a valve flap opening adjustment device provided in an embodiment of the present application;
[0027] Figure 4 It is a schematic diagram of the connection structure between the adjustment rod and the stop seat provided in an embodiment of the present application.
[0028] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:
[0029] 1. Valve body; 1-1. Valve seat; 1-2. Valve neck; 1-3. Valve cover; 2. Valve disc; 3. Piston cylinder; 3-1. Pressure chamber; 3-2. Pressure relief chamber; 4. Piston; 5. Adjusting rod; 6. Elastic part; 7. Pressure relief pipe; 8. Elastic buffer part; 9. Limit part; 10. Stop seat; 11. Limit rod. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0031] The following is combined with Figure 1-4 This application is described in further detail.
[0032] The present application discloses a swing check valve with a pressure reducing function. Figure 1-2 The swing check valve with pressure reducing function comprises a valve body 1 and a valve disc 2, wherein the valve disc 2 is rotatably connected to the valve body 1 and is used to open and close the valve seat opening 1-1 of the valve body 1. A valve disc opening adjustment device is arranged in the valve body 1, and the valve disc opening adjustment device comprises a piston cylinder 3, a piston 4, an adjustment rod 5 and an elastic member 6, wherein the piston cylinder 3 is fixed to the valve body 1, the piston 4 is elastically supported in the piston cylinder 3 by the elastic member 6, and the piston 4 divides the inner cavity of the piston cylinder 3 into a pressure chamber 3-1 and a pressure relief chamber 3-2, the pressure chamber 3-1 is connected to the inner cavity of the valve body 1, and the pressure relief chamber 3-2 is connected to the outside atmosphere. The adjusting rod 5 is connected to the piston 4, and the adjusting rod 5 extends out of the piston cylinder 3 along the pressure relief chamber 3-2, so as to be positioned against the valve flap 2 in the open state; in addition, the pressure direction applied by the fluid in the pressure chamber 3-1 to the piston 4 is opposite to the elastic force direction applied by the elastic member 6 to the piston 4. When the fluid pressure is greater than the threshold value, the fluid pressure can push the piston 4 and the adjusting rod 5 to move closer to the valve flap 2 to adjust the opening of the valve flap 2; when the fluid pressure is less than the threshold value, the elastic member 6 can push the piston 4 and the adjusting rod 5 to move away from the valve flap 2 to cancel the restriction on the opening of the valve flap 2.
[0033] Under this design, the swing check valve can automatically adjust the opening of the valve disc 2 according to the fluid pressure in the valve, limit the maximum pressure at the outlet of the valve body 1 and ensure the stability of the pressure at the outlet, and avoid damage to the pipeline and equipment caused by excessive pressure after the valve; at the same time, it can also smoothly adjust and control the flow rate of the fluid so that it can be supplied to the downstream pipeline and equipment in a relatively constant and acceptable range, ensuring the stable and normal operation of the downstream pipeline and equipment.
[0034] In addition, since the opening limit of the valve disc 2 is realized by the piston 4 and the adjusting rod 5, when the fluid impacts the valve disc 2 to open the valve disc 2, the movable piston 4 and the adjusting rod 5 can form a buffer for the valve disc 2, thereby protecting the valve body 1, reducing the noise and vibration during the operation of the swing check valve, and extending the service life of the swing check valve. Therefore, under this design, the swing check valve integrates the functions of non-return, pressure reduction, and shock absorption, and achieves the effect of one valve for multiple uses while increasing the stability of the traditional check valve.
[0035] In addition, it should be noted that the threshold value can be selected and set with reference to the pressure range allowed for pipeline operation. Generally speaking, when the fluid pushes the valve flap 2, so that the valve flap 2 forms a resistance limit with the valve flap opening adjustment device at a desired opening angle, and the fluid pressure at the outlet end of the valve body 1 is within the acceptable range of downstream equipment, pipelines and other components, the value of the fluid pressure in the valve body 1 at this time can usually be used as the threshold value.
[0036] Further, such as Figure 1-2 As shown, in this embodiment, a through hole is formed at one end of the piston cylinder 3 facing the valve disc 2, and the through hole is used for the adjustment rod 5 to pass through; and the end of the piston cylinder 3 away from the valve disc 2 is an open communication port, and the communication port is used for the fluid in the valve to apply pressure to the piston 4. Furthermore, in order to ensure the stable sealing of the chamber in the piston cylinder 3, a sealing ring is embedded on the circumferential surface of the piston 4 and the circumferential inner wall of the through hole.
[0037] Furthermore, in order to achieve stable installation of the piston cylinder 3, the piston cylinder 3 is fixedly connected to the inner wall of the valve body 1 through a connecting plate. In order to achieve communication between the pressure relief chamber 3-2 and the outside atmosphere, the piston cylinder 3 is also connected to a pressure relief pipe 7, one end of which is connected to the pressure relief chamber 3-2, and the other end is connected to the atmosphere outside the valve body 1. When the pressure relief pipe 7 is made of a hard material, the pressure relief pipe 7 not only achieves communication between the pressure relief chamber 3-2 and the outside atmosphere, but also can be used as a connecting member to achieve stable connection between the piston cylinder 3 and the pressure relief pipe 7.
[0038] Of course, in some embodiments, one radial end of the piston cylinder 3 can be directly in contact with or combined with the inner wall of the valve body 1. In this case, a pressure relief hole can be opened along the wall thickness direction at the contact or combination portion between the piston cylinder 3 and the valve body 1, so that one end of the pressure relief hole is connected to the outside world, and the other end is connected to the pressure relief chamber 3-2. In this case, there is no need to set a pressure relief pipe 7 between the piston cylinder 3 and the valve body 1; it should be noted that this design needs to ensure that no leakage occurs at the contact or combination portion between the piston cylinder 3 and the valve body 1.
[0039] Furthermore, in this embodiment, the elastic member 6 is a pressure spring arranged in the pressure relief chamber 3-2, one end of the pressure spring contacts or is connected to the inner bottom wall of the pressure relief chamber 3-2, and the other end of the pressure spring contacts or is connected to the end face of the piston 4.
[0040] Of course, in some implementation schemes, the elastic member 6 can also be selected as a structure such as a spring sheet, and it is only necessary that the elastic member 6 can form an elastic support for the piston 4 and ensure that the elastic member 6 does not block the connection between the pressure relief chamber 3-2 and the outside world.
[0041] Furthermore, in order to reduce the impact of fluid impact on the check valve, an elastic buffer 8 is installed in the pressure chamber 3-1 of the piston cylinder 3. The elastic buffer 8 is in contact with or connected to the piston 4. The elastic buffer 8 is used to absorb the impact kinetic energy transmitted from the valve disc 2 to the piston 4 when the fluid impacts the valve disc 2.
[0042] In this embodiment, the elastic buffer 8 is preferably a buffer spring, which is detachably installed in the pressure chamber 3-1, and one end of the buffer spring contacts the end surface of the piston 4. Of course, in some embodiments, the elastic buffer 8 can also be selected as a component such as a spring sheet; of course, the elastic buffer 8 can be directly fixedly installed in the pressure chamber 3-1.
[0043] Furthermore, when the elastic buffer 8 is selected as a buffer spring, a detachable stopper 9 is installed at the communication port of the pressure chamber 3-1 to achieve detachable installation of the buffer spring. After the elastic member 6, the piston 4 and the elastic buffer 8 are installed in the piston cylinder 3, the stopper 9 is installed at the communication port so that the stopper 9 and the elastic buffer 8 form an end face conflict along the axial direction, thereby restricting the elastic buffer 8 and other components in the piston cylinder 3.
[0044] As a preferred example, Figure 2-3 As shown, in this embodiment, the stopper 9 is selected as an elastic snap ring, which can be snapped into the ring groove of the connecting port. In other embodiments, the stopper 9 can also be a screw cap with a perforation that is threadedly assembled at the connecting port, or a stopper pin that is plugged into the connecting port. It should be noted that after the stopper 9 is set, it should be ensured that there is still enough space at the connecting port for the fluid in the valve to enter and exit the pressure chamber 3-1, so as to ensure that the fluid in the pressure chamber 3-1 can exert pressure on the piston 4.
[0045] Furthermore, in some embodiments, the valve flap opening adjustment device also includes a stop seat 10, which is rotatably arranged on the outer end of the adjusting rod 5 through a rotating shaft. The rotation axis of the stop seat 10 is preferably parallel to the rotation axis of the valve flap 2, and the stop seat 10 has a stop surface for positioning the valve flap 2.
[0046] In this setting, by setting the stopper 10, the regulating rod 5 is positioned against the opened valve disc 2 through the stopper 10. When a strong fluid impact is generated at the inlet end of the valve body 1, the valve disc 2 will first contact the stopper 10, and then the stopper 10 will work with the piston 4 and the buffer spring to absorb the impact kinetic energy, thereby preventing the valve disc 2 from colliding with the valve body 1 during the opening process, thereby protecting the valve body 1 and extending the service life of the valve.
[0047] Furthermore, in some embodiments, a limiting structure is provided at the outer end of the adjusting rod 5, and the limiting structure is used to limit the rotation range of the stop seat 10, so that the rotation angle of the stop surface is limited to between 5 degrees and 30 degrees.
[0048] In actual production and manufacturing, the rotation angle range can be set to any desired numerical range according to needs, such as 10 degrees to 30 degrees, etc. This design is mainly used to ensure that the stop surface of the stop seat 10 can always face the valve flap 2, ensuring that the valve flap 2 can be in good contact with the stop surface after rotation.
[0049] Specifically, if Figure 4 As shown, in this embodiment, the limiting structure includes two groups of limiting rods 11, both groups of limiting rods 11 are fixed to the adjusting rod 5, and the two groups of limiting rods 11 are arranged on both sides of the stop seat 10 so that the rotatable range of the stop seat 10 is located between the two groups of limiting rods 11.
[0050] In other embodiments, the limit rod 11 can also be replaced by a screw, by threading the rod of the screw to the adjusting rod 5 and making the head of the screw protrude from the surface of the adjusting rod 5, the head of the screw is used to limit the rotation range of the stop seat 10.
[0051] Further, such as Figure 1 As shown, in this embodiment, in order to facilitate the installation and maintenance of the valve flap opening adjustment device, the middle part of the valve body 1 protrudes upward to form a valve neck 1-2, and the valve flap opening adjustment device is connected to the inside of the valve neck 1-2. The upper end of the valve neck 1-2 is provided with an inspection port, and the outer end cover of the inspection port is covered with a detachable valve cover 1-3.
[0052] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations or constituent elements, and do not limit one or more additional functions, operations and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components or combinations thereof.
[0053] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0055] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection 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 this application can be understood according to specific circumstances.
[0056] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.
Claims
1. A swing check valve with pressure reducing function, characterized in that: It comprises a valve body (1) and a valve flap (2), wherein the valve flap (2) is rotatably connected to the valve body (1) and is used to open and close a valve seat opening (1-1) of the valve body (1); A valve flap opening adjustment device is arranged in the valve body (1), and the valve flap opening adjustment device comprises a piston cylinder (3), a piston (4), an adjustment rod (5) and an elastic member (6). The piston cylinder (3) is fixed to the valve body (1), and the piston (4) is elastically supported in the piston cylinder (3) through the elastic member (6), wherein: The piston (4) divides the inner cavity of the piston cylinder (3) into a pressure cavity (3-1) and a pressure relief cavity (3-2); the pressure cavity (3-1) is connected to the inner cavity of the valve body (1), while the pressure relief cavity (3-2) is connected to the outside atmosphere; The regulating rod (5) is connected to the piston (4), and the regulating rod (5) extends through the pressure relief chamber (3-2) and out of the piston cylinder (3) to be used for the valve disc (2) in the open state to abut against and position. The direction of the pressure exerted by the fluid in the pressure chamber (3-1) on the piston (4) is opposite to the direction of the elastic force exerted by the elastic member (6) on the piston (4); when the fluid pressure is greater than a threshold value, the fluid pressure can push the piston (4) and the regulating rod (5) to move closer to the valve flap (2) to adjust the opening of the valve flap (2); when the fluid pressure is less than the threshold value, the elastic member (6) can push the piston (4) and the regulating rod (5) to move away from the valve flap (2) to cancel the restriction on the opening of the valve flap (2).
2. The swing check valve with pressure reducing function according to claim 1, characterized in that: The elastic member (6) is a pressure spring arranged in the pressure relief chamber (3-2), one end of the pressure spring is in contact with or connected to the inner bottom wall of the pressure relief chamber (3-2), and the other end of the pressure spring is in contact with or connected to the end surface of the piston (4).
3. The swing check valve with pressure reducing function according to claim 1, characterized in that: An elastic buffer (8) is installed in the pressure chamber (3-1), and the elastic buffer (8) is used to absorb the impact kinetic energy transmitted from the valve disc (2) to the piston (4) when the fluid impacts the valve disc (2).
4. The swing check valve with pressure reducing function according to claim 3, characterized in that: A detachable limiting member (9) is installed at the communication port of the pressure chamber (3-1), and the limiting member (9) abuts against the elastic buffer member (8) to limit the elastic buffer member (8) within the pressure relief chamber (3-2).
5. The swing check valve with pressure reducing function according to claim 1, characterized in that: The piston cylinder (3) is connected to a pressure relief pipe (7), one end of the pressure relief pipe (7) is in communication with the pressure relief chamber (3-2), and the other end of the pressure relief pipe (7) is in communication with the atmosphere outside the valve body (1).
6. The swing check valve with pressure reducing function according to any one of claims 1 to 5, characterized in that: The valve flap opening adjustment device also includes a stop seat (10), which is rotatably arranged on the outer end of the adjustment rod (5), and has a stop surface for positioning the valve flap (2).
7. The swing check valve with pressure reducing function according to claim 6, characterized in that: The outer end of the adjusting rod (5) is provided with a limiting structure, and the limiting structure is used to limit the rotation range of the stop seat (10), so that the rotation angle of the stop surface is limited to between 5 degrees and 30 degrees.
8. The swing check valve with pressure reducing function according to claim 7, characterized in that: The limiting structure comprises two groups of limiting rods (11), which are arranged on both sides of the stop seat (10) so that the rotatable range of the stop seat (10) is located between the two groups of limiting rods (11).
9. The swing check valve with pressure reducing function according to any one of claims 1 to 5, characterized in that: The middle part of the valve body (1) protrudes upwards and forms a valve neck (1-2), and the valve flap opening adjustment device is connected inside the valve neck (1-2).
10. The swing check valve with pressure reducing function according to claim 9, characterized in that: An inspection port is provided at the upper end of the valve neck (1-2), and a detachable valve cover (1-3) is provided on the outer end of the inspection port.