Intelligent control low-pressure-drop axial flow type check valve

Abstract

The utility model discloses an intelligent control low-pressure-drop axial-flow type check valve, which relates to the field of valves, and comprises a valve body, a valve seat, a valve clack and a valve rod, and further comprises a driving piece, a valve rod and a valve rod, the pressure sensors are arranged at an inlet and an outlet of the valve body; the control system is used for receiving data of the pressure sensor and controlling the driving part to operate; the flow guide cover is arranged in the valve body; the valve clack is provided with a shaft rod installed in the valve body in a sliding mode, the valve rod is in linkage connection with the shaft rod, and the valve clack has the first state that the valve clack is driven by the valve rod to be close to the flow guide cover and enables the valve to be opened and the second state that the valve clack is driven by the valve rod to be away from the flow guide cover and enables the valve to be closed. The utility model has the advantages of accurate control, reliable sealing and stable flow field.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to an intelligently controlled low-pressure-drop axial-flow check valve. Background Art

[0002] Traditional axial-flow check valves rely primarily on the pressure differential of the medium itself and the spring effect to achieve automatic closing. However, in complex and changing fluid systems, especially those operating under low pressure conditions, with low pressure drop and high flow requirements, the relatively small thrust generated by the medium often prevents the valve disc from fully opening. This leads to increased turbulence within the valve cavity, increased flow resistance, and reduced flow.

[0003] Therefore, this basic control mechanism often fails to fully meet the stringent requirements for flow, low pressure drop, and fast response. Furthermore, the seat seal of traditional check valves typically relies on the return pressure of the medium and spring force, resulting in significantly higher leakage rates than valves with a forced seal design.

[0004] Traditional check valves are often unable to meet the requirements of working environments with strict sealing performance. In view of these limitations, it is particularly urgent and important to develop a new axial flow check valve that can intelligently control low pressure drop. Utility Model Content

[0005] In order to overcome the shortcomings of the background technology, the utility model provides an intelligently controlled low-pressure-drop axial-flow check valve with precise control, reliable sealing, and stable flow field.

[0006] The technical solution adopted by the utility model is: an intelligent controlled low-pressure drop axial flow check valve, including a valve body, a valve seat, a valve disc and a valve stem, and also includes:

[0007] A driving member, which is mounted on the valve body and linked to the valve stem;

[0008] pressure sensors, which are arranged at the inlet and outlet of the valve body;

[0009] a control system for receiving data from the pressure sensor and controlling the operation of the driving member;

[0010] A flow guide cover is arranged in the valve body;

[0011] The valve flap is provided with a shaft slidably mounted in the valve body, the valve stem is linked to the shaft, and the valve flap has a first state in which the valve stem drives the valve flap closer to the guide cover and opens the valve, and a second state in which the valve stem drives the valve flap away from the guide cover and closes the valve.

[0012] The control system includes a PLC control module for receiving data and a solenoid valve connected to the PLC control module, wherein the solenoid valve is used to control the air source inlet and outlet of the driving member.

[0013] The valve stem is arranged on one side of the shaft, and a linkage-connected shift fork is provided at the bottom end of the valve stem. A pin is provided on the shaft, and a straight groove is provided on the shift fork that is adapted to the pin and slides with the pin. When the valve stem is rotated forward or reversed, the shaft is driven to realize linear reciprocating motion through the cooperation of the shift fork and the pin.

[0014] The driving member adopts a pneumatic actuator.

[0015] The deflector cover and the valve flap are in a shuttle shape after being closed.

[0016] The valve stem and the shift fork are connected by a square head.

[0017] A guide sleeve for sliding fit of the shaft is provided at the center of the valve seat.

[0018] The beneficial effects of this utility model are as follows: This technical solution installs high-precision pressure sensors at the valve inlet and outlet, respectively, for real-time collection of inlet and outlet pressure data. This data is transmitted to the control system via a signal line. The control system performs intelligent analysis based on the received pressure data. When it determines that the inlet pressure is greater than or equal to the outlet pressure, the control system controls the air source to enter the opening cylinder chamber of the driver, opening the valve; conversely, when it is less than, the control system controls the air source to enter the closing cylinder chamber of the driver, closing the valve. This process achieves precise control of the fluid flow direction; in addition, the deflector can reduce the formation of turbulence in the valve cavity, which has the advantage of stable flow field. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of an intelligently controlled low-pressure-drop axial-flow check valve according to an embodiment of the present utility model.

[0020] Figure 2 A cross-sectional view of an intelligently controlled low-pressure-drop axial-flow check valve. DETAILED DESCRIPTION

[0021] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0022] As shown in the figure, the intelligent controlled low pressure drop axial flow check valve includes a valve body 1, a valve seat 2, a valve disc 3 and a valve stem 4, and also includes:

[0023] A driving member 5 is mounted on the valve body 1 and is linked to the valve stem 4;

[0024] a pressure sensor 6 , which is arranged at the inlet and outlet of the valve body 1 ;

[0025] a control system 7 for receiving data from the pressure sensor 6 and controlling the operation of the driving member 5;

[0026] a flow guide cover 8, which is arranged in the valve body 1;

[0027] The valve flap 3 is provided with a shaft 9 that is slidably mounted in the valve body 1. The valve stem 4 is linked to the shaft 9. The valve flap 3 has a first state in which it is driven by the valve stem 4 to approach the flow guide 8 and open the valve, and a second state in which it is driven by the valve stem 4 to move away from the flow guide 8 and close the valve. The present technical solution is provided with high-precision pressure sensors at the valve inlet and outlet, respectively, for real-time acquisition of pressure data at the inlet and outlet. These data are transmitted to the control system via a signal line. The control system performs intelligent analysis based on the received pressure data. When it is determined that the pressure at the inlet is greater than or equal to the pressure at the outlet, the control system controls the air source to enter the opening cylinder chamber of the driving component and the valve is opened. Conversely, when it is less than, the control system controls the air source to enter the closing cylinder chamber of the driving component and the valve is closed. This process achieves precise control of the fluid flow direction. In addition, the flow guide can reduce the formation of turbulence in the valve cavity and has the advantage of stable flow field.

[0028] The control system 7 includes a PLC control module 10 for receiving data and a solenoid valve 11 connected to the PLC control module 10 . The solenoid valve 11 is used to control the air supply of the driving member 5 .

[0029] The valve stem 4 is arranged on one side of the shaft 9, and a linkage-connected shift fork 12 is provided at the bottom end of the valve stem 4. A pin 13 is provided on the shaft 9, and a straight groove 14 is provided on the shift fork 12 that is adapted to the pin 13 and slides with the pin 13. When the valve stem 4 is reversed, the shift fork 12 and the pin 13 cooperate to drive the shaft 9 to realize linear reciprocating motion. The valve of this embodiment adopts a forced sealing structure, and the valve stem is driven by a pneumatic actuator to rotate. The valve stem 4 and the shift fork 12 are connected by a square head. The rotation of the valve stem can drive The pneumatic actuator rotates synchronously with the shift fork. In addition, in order to prevent the shift fork from falling off, an anti-fall-off pin is set for fixation. A straight groove is processed on the shift fork, and the width of the groove is consistent with the pin shaft. The pin shaft is installed on the shaft of the valve disc through a thread. After the installation is completed, the pin shaft is exactly placed in the straight groove of the shift fork, which can effectively prevent the pin shaft from falling off due to loose threads. When the pneumatic actuator is actuated, it will drive the valve stem to rotate, and the shift fork will swing accordingly, dragging the pin shaft to move; the movement of the pin shaft then drives the valve disc to move axially, thereby realizing the opening and closing of the valve.

[0030] When the valve is fully open, the disc and the guide cover can be closed and the closed shape forms a shuttle, forming a complete guide cover, thereby reducing the formation of turbulence in the valve cavity. When the valve is fully closed, the pneumatic actuator is used to force the seal, and the leakage rate of the seal can be consistent with that of a ball valve.

[0031] The driving member 5 adopts a pneumatic actuator; a pneumatic actuator is commonly known as a pneumatic head or a pneumatic actuator; a pneumatic actuator has a stable operation and a strong load capacity and is suitable for high-frequency operations.

[0032] A guide sleeve 15 for sliding fit of the shaft 9 is provided at the center of the valve seat 2; the shaft and the valve disc are integrally formed.

[0033] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" 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 an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0035] Technical personnel please note: Although the utility model has been described according to the above specific implementation methods, the utility model concept of the utility model is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of this patent.

Claims

1. An intelligent controlled low-pressure drop axial flow check valve, comprising a valve body (1), a valve seat (2), a valve disc (3) and a valve stem (4), characterized in that: Also includes: A driving member (5) is mounted on the valve body (1) and is linked to the valve stem (4); pressure sensors (6), which are arranged at the inlet and outlet of the valve body (1); A control system (7) for receiving data from the pressure sensor (6) and controlling the operation of the driving member (5); A flow guide cover (8) disposed inside the valve body (1); The valve flap (3) is provided with a shaft (9) slidably mounted in the valve body (1), and the valve stem (4) is linked to the shaft (9). The valve flap (3) has a first state in which it is driven by the valve stem (4) to approach the flow guide cover (8) and the valve is opened, and a second state in which it is driven by the valve stem (4) to move away from the flow guide cover (8) and the valve is closed.

2. The intelligent controlled low pressure drop axial flow check valve according to claim 1, characterized in that: The control system (7) comprises a PLC control module (10) for receiving data and a solenoid valve (11) connected to the PLC control module (10), wherein the solenoid valve (11) is used to control the inlet and outlet of the air source of the driving member (5).

3. The intelligent controlled low pressure drop axial flow check valve according to claim 1, characterized in that: The valve stem (4) is arranged on one side of the shaft (9), and a shift fork (12) is provided at the bottom end of the valve stem (4) for linkage connection. A pin shaft (13) is provided on the shaft (9), and a straight groove (14) is provided on the shift fork (12) that is adapted to the pin shaft (13) and slides with the pin shaft (13). When the valve stem (4) rotates forward or reverse, the shift fork (12) and the pin shaft (13) cooperate to drive the shaft (9) to realize linear reciprocating motion.

4. The intelligent controlled low pressure drop axial flow check valve according to claim 1, characterized in that: The driving member (5) adopts a pneumatic actuator.

5. The intelligent controlled low pressure drop axial flow check valve according to claim 1, characterized in that: The deflector cover (8) and the valve flap (3) are in a shuttle shape when closed.

6. The intelligent controlled low pressure drop axial flow check valve according to claim 3, characterized in that: The valve stem (4) and the shift fork (12) are connected by a square head.

7. The intelligent controlled low pressure drop axial flow check valve according to claim 1, characterized in that: A guide sleeve (15) for sliding engagement with the shaft rod (9) is provided at the center of the valve seat (2).

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