A diaphragm pressure driving device and a pressure regulating valve using the same

Abstract

The application discloses a diaphragm pressure driving device and a pressure control valve using the same, which comprises a diaphragm component and a diaphragm box component, the diaphragm box component comprises an upper diaphragm box and a lower diaphragm box; the diaphragm component comprises a diaphragm and a diaphragm support, the outer edge of the diaphragm is fixed with the diaphragm box component, the diaphragm pressure driving device further comprises a first seat body and a second seat body, the first seat body can abut against the diaphragm support, the second seat body can abut against the diaphragm, the diaphragm axially abuts against the diaphragm support, the diaphragm support comprises two or more than two hole portions, the axial projection profile of the hole wall of each hole portion does not comprise a concentric circular arc segment of a concentric circle arranged radially with the center of the diaphragm support as the center; or, the axial projection profile of each hole wall comprises the concentric circular arc segment, and the sum of the radian of the concentric circular arc segments with the same radius is less than 120 DEG, the application can avoid or reduce the potential defect of fatigue fracture of the diaphragm, and improve the reliability of the diaphragm pressure driving device and the pressure control valve using the same.

Claims

1. A diaphragm pressure drive device, characterized by, The diaphragm pressure actuation device is used in a pressure regulating valve. The diaphragm pressure actuation device includes a diaphragm component and a diaphragm housing component. The diaphragm housing component includes an upper diaphragm housing and a lower diaphragm housing. The diaphragm component includes a diaphragm and a diaphragm support. The outer edges of the diaphragm support and the diaphragm are fixed to the diaphragm housing component. The diaphragm pressure actuation device also includes a first seat and a second seat. The first seat can abut against the diaphragm support, and the second seat can abut against the diaphragm. Furthermore, the end of the second seat facing away from the diaphragm can also abut against the valve stem of the valve core component of the pressure regulating valve. The diaphragm abuts axially with the diaphragm support, the diaphragm support including two or more holes, and the axial projection profile of the hole wall of each hole does not include the concentric arc segment of a concentric circle arranged radially with the center of the diaphragm support as the center; Alternatively, the axial projection profile of each of the hole walls includes the concentric circular arc segments, and satisfies that the sum of the radii of the concentric circular arc segments with the same radius is less than 120°.

2. The diaphragm pressure drive of claim 1, wherein, The axial projection profile of each hole wall does not include the concentric circular arc segment; Set on the diaphragm support, Di is the diameter of the concentric circles radially arranged with the axis of the diaphragm support as the center, and ΣWi is the sum of the arcs of the concentric circles of diameter Di passing through the various hole regions. When Di=Dn, the arc value of ΣWn is the largest, and then the following condition is satisfied: ΣWn<180°.

3. The diaphragm pressure drive of claim 1, wherein, The axial projection contour of each hole wall does not include the concentric circular arc segment, there are two or more holes, and the holes are circular.

4. The diaphragm pressure driving device as described in claim 3, characterized in that, The first seat is circular and is axially concentric with the diaphragm support. Each hole is symmetrically arranged with respect to the axis of the diaphragm support, and each hole has the same diameter. The diameter of the circle passing through the center of each hole is defined as d1, and the diameter of the outer edge of the first seat is defined as D1. Then, the difference between the values ​​of d1 and D1 is less than 3mm (i.e., |d1-D1| < 3mm).

5. The diaphragm pressure driving device as described in claim 3, characterized in that, Defined as follows: the circular diameter of each hole is d2, the diameter of the outer edge of the diaphragm is D2, and the radial width of the area where the outer edge of the diaphragm is welded and fixed to the diaphragm box component is a. Then, the following condition is satisfied: the difference between the value of d2 and (D2-D1) / 2-a is less than 3mm (i.e., |d2-((D2-D1) / 2-a)|<3mm).

6. The diaphragm pressure driving device according to any one of claims 1-5, characterized in that, Defined as S1, the area of ​​the annular region formed by the largest and smallest outer circles defined by the hole walls of each hole along the radial direction of the diaphragm support is S1, and the sum of the axial projection areas of the hole regions of each hole is ΣS2. Then, ΣS1 <S2 / 2。 7. The diaphragm pressure driving device as described in claim 6, characterized in that, The first seat, the second seat, the diaphragm, and the diaphragm support are axially concentric, and the diameter of the maximum outer circle of the second seat in contact with the diaphragm is smaller than the diameter of the maximum outer circle of the first seat in contact with the diaphragm support.

8. A pressure regulating valve, comprising a valve body component, a valve core component, and a regulating component, wherein the valve body component includes a flow path inlet end, a flow path outlet end, and a valve port, the valve core component includes a valve stem disposed within the inner cavity of the pressure regulating valve, the valve stem including a valve core portion, the valve core portion being capable of cooperating with the valve port portion to regulate the flow rate of the pressure regulating valve, characterized in that, It also includes the diaphragm pressure drive device as described in any one of claims 1-7, wherein one end of the valve stem abuts against the second seat, the valve body component includes an upper valve body and a lower valve body, the other end of the valve stem abuts against the lower valve body via an abutment spring, and the adjusting spring of the adjusting component abuts against the first seat.

9. The pressure regulating valve as described in claim 8, characterized in that, The upper valve body is fixedly connected to the lower valve body. The lower valve body includes the flow path inlet end, and the upper valve body includes the flow path outlet end and the valve port.

10. The pressure regulating valve as described in claim 9, characterized in that, The lower diaphragm box includes a lower connecting hole, and the upper end of the upper valve body extends into the lower connecting hole and is welded and fixed to the lower diaphragm box; the upper diaphragm box includes an upper connecting hole, and the lower end of the outer shell of the adjusting component extends into the upper connecting hole and is welded and fixed to the upper diaphragm box.

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