CN105715837B - A kind of fluid flow regulator valve - Google Patents

Abstract

The invention discloses a fluid flow regulating valve. The fluid flow regulating valve includes a valve body, a valve and a valve core positioning flange. It is coaxial with the frustum-shaped through hole of the valve body, and the distance of moving the valve core along the axial direction can adjust the fluid flow. The fluid flow rate of the flow regulating valve is basically in a linear relationship with the moving distance of the valve core. This flow regulating valve is easy to regulate fluid flow.

Description

A fluid flow regulating valve

technical field

The invention relates to the field of fluid flow regulation, that is, given the upstream fluid pressure, the ideal fluid flow can be finally obtained by adjusting the opening of the flow regulating valve.

Background technique

With the rapid development of the economy, people are involved in the flow regulation of fluids in industrial production, chemical industry, automotive applications and other fields. The common adjustment method is to control the fluid flow by opening a needle valve to a certain opening degree, or to limit the flow by using the orifice structure. Needle valves and other spools have a small opening range, which is not suitable for precise control. Devices such as orifice structures are greatly affected by upstream pressure, which is not conducive to precise control of fluid flow when upstream pressure fluctuates.

Contents of the invention

The present invention designs a fluid flow regulating valve, by adjusting the distance between the conical sealing head of the valve core of the fluid flow regulating valve and the upper bottom surface of the truncated conical through hole to change the size of the through hole of the valve to determine the fluid flow passing through the regulating valve .

The technical scheme adopted in the present invention is: design a fluid flow regulating valve, the flow regulating valve includes a valve body, a valve core and a valve core positioning flange, the middle of the valve body is provided with a frustum-shaped through hole along the axial direction, and the valve core includes A cylindrical connecting rod with external threads and a conical sealing head, one end of the connecting rod is fixedly connected to the conical sealing head through a conical frustum, and the upper bottom surface of the conical frustum is connected to the cylindrical connecting rod and connected to the cylindrical connecting rod. The radial cross-sectional area of the rod is equal, the lower bottom surface of the conical frustum body is connected with the bottom surface of the conical sealing head, and the area is equal to the bottom surface of the conical sealing head; the valve core is positioned at the opening of the lower bottom surface of the frustum-shaped through hole of the valve body Flange; the upper middle part of the spool positioning flange is provided with a through hole with internal thread, the through hole with internal thread is coaxial with the conical through hole, and the through hole with internal thread on the spool positioning flange is provided around. There is a through hole for the passage of fluid; one end of the conical sealing head of the valve core extends from the lower end of the frustum-shaped through-hole of the valve body to the through-hole of the frustum-shaped through-hole of the valve body, and the connecting rod and the positioning flange of the valve core are screwed together ; On the side of the valve core positioning flange far away from the valve body, there is a cylindrical fluid buffer chamber with one end open and the other end closed. The open end of the fluid buffer chamber is airtightly connected with the valve body; Through the through hole, the end of the connecting rod away from the conical sealing head protrudes from the through hole to the outside of the fluid buffer chamber; a fluid inlet is provided on the fluid buffer chamber. Through the rotation of the connecting rod, the distance between the conical sealing head and the upper bottom surface of the truncated conical through hole is changed to change the through hole size of the valve, and the distance between the conical sealing head and the upper bottom surface of the truncated conical through hole is changed by the fluid pressure. The size of the orifice of the valve determines the fluid flow through the regulator valve.

The radial cross-sectional area of the through hole used for fluid passage on the valve core positioning flange is greater than the difference between the bottom surface of the frustum-shaped through-hole of the valve body and the bottom surface of the conical sealing head of the valve core. A sealing ring for sealing is arranged between the valve core connecting rod and the fluid buffer chamber.

The through hole in the center of the valve body of the present invention is in the shape of a truncated cone. When the valve core moves in the middle of the valve body, a variable concentric ring-shaped through hole is formed between the conical valve core and the through hole of the valve body. The fluid flow through the flow regulator The relationship with the moving distance of the spool is basically linear. This flow regulating valve is easy to regulate the fluid flow.

Description of drawings

Fig. 1 is the flow diagram of nitrogen gas at different positions of the conical sealing head of the valve core;

Figure 2 is a structural diagram of the flow regulating valve.

Detailed ways:

Example 1:

Design a flow regulating valve for adjusting the flow of nitrogen gas. The regulating valve includes a valve body 1, a valve core 2 and a valve core positioning flange 3. It includes a cylindrical connecting rod with external thread and a conical sealing head. One end of the connecting rod is fixedly connected to the conical sealing head through a conical frustum. The radial cross-sectional areas of the connecting rods are equal, the lower bottom surface of the frustum of the cone is connected with the bottom surface of the conical sealing head, and has the same area as the bottom surface of the conical sealing head;

A spool positioning flange 3 is provided at the opening of the lower bottom surface of the truncated conical through hole of the valve body 1; a through hole with an internal thread is provided in the upper middle of the spool positioning flange 3, and a through hole with an internal thread is connected with the truncated cone. The through hole is coaxial, and there is a through hole for fluid passing around the through hole with internal thread on the spool positioning flange 3; one end of the conical sealing head of the spool 2 extends into the truncated conical through hole One end of the lower bottom surface reaches the frustum-shaped through hole of the valve body 1, and the connecting rod is screwed with the valve core positioning flange 3;

On the side of the valve core positioning flange 3 away from the valve body 1, there is a cylindrical fluid buffer chamber 5 with one end open and the other end closed. The open end of the fluid buffer chamber is airtightly connected with the valve body 1; The through hole through which the connecting rod passes, and the end of the connecting rod away from the conical sealing head protrudes from the through hole to the outside of the fluid buffer chamber; a fluid inlet 4 is provided on the fluid buffer chamber. Set the inlet pressure of the nitrogen flow regulating valve to 0.7Mpa, and change the distance between the conical sealing head and the upper bottom surface of the truncated conical through hole by rotating the connecting rod to change the size of the through hole of the valve. The obtained nitrogen flow is shown in Figure 1. The starting position of the conical sealing head of valve core 2 is the position of the upper bottom surface of the frustum-shaped through hole of valve body 1. The position of the sealing head moves 25mm in the direction of the lower bottom surface of the conical through-hole along the axial direction, and the nitrogen flow rate is changed from 0.2mol/s Increased to 1.4mol/s, the nitrogen flow rate basically has a linear relationship with the moving distance of the sealing head of the valve core.

Claims (6)

1. A kind of 1. fluid flow regulator valve, it is characterised in that：Including valve body (1), valve element (2) and valve element locating flange (3), valve body (1) middle part is provided with circular cone shape through hole vertically, and valve element (2) is included with externally threaded cylindrical connecting rods and coniform seal head, One end of connecting rod is affixed by a circular cone stage body and coniform seal head, and the upper bottom surface of circular cone stage body is connected with cylindrical connecting rods Connect and with cylindrical connecting rods radial section area equation, the bottom surface of circular cone stage body be connected with coniform seal head bottom surface and It is equal with coniform seal head base area；

   Valve element locating flange (3) is provided with the circular cone shape through hole bottom surface opening of valve body (1)；On valve element locating flange (3) Middle part be provided with tapped through hole, tapped through hole and circular cone shape through hole are coaxial, on valve element locating flange (3) Tapped through hole is surrounded by the through hole passed through for fluid；Coniform seal head one end of valve element (2) is stretched into from valve body (1) in the circular cone shape through hole of circular cone shape through hole bottom surface one end to valve body (1), connecting rod is screwed with valve element locating flange (3)；

   In valve element locating flange (3) away from the tubular fluid cushion chamber that valve body (1) side is provided with one end open, the other end is closed (5), fluid cushion chamber openend and valve body (1) airtight connection；It is provided with the blind end of fluid cushion chamber and is used for what connecting rod passed through Through hole, connecting rod are reached outside fluid cushion chamber away from coniform seal head one end from this through hole；In setting stream on fluid cushion chamber Body entrance (4).
2. 2. according to the fluid flow regulator valve described in claim 1, it is characterised in that：It is provided with and is used between connecting rod and fluid cushion chamber The sealing ring of sealing.
3. 3. according to the fluid flow regulator valve described in claim 1, it is characterised in that：The through hole radial section passed through for fluid Area is more than the difference of the circular cone shape through hole bottom surface of valve body (1) and the coniform seal head base area of valve element (2).
4. 4. according to the fluid flow regulator valve described in claim 1, it is characterised in that：

   Circular cone shape through hole and coniform seal head are coaxial.
5. 5. according to the fluid flow regulator valve described in claim 1, it is characterised in that：

   Distance between coniform seal head and circular cone shape through hole upper bottom surface is changed by the rotation of connecting rod to change the through hole of valve Size, finally change fluid flow.
6. 6. according to the fluid flow regulator valve described in claim 1, it is characterised in that：Circular cone shape through hole upper bottom surface is away from valve element Locating flange (3) side is provided with circular cone shape fluid expansion mouth.