CN204300382U - High Pressure Difference multi-stage sleeve modulating valve - Google Patents

Abstract

High pressure difference multi-stage sleeve regulating valve is composed of valve body, valve seat, sleeve assembly, valve stem, valve disc, valve cover, bolts and so on. The valve cover presses the sleeve assembly through bolts, and at the same time presses the valve seat on the valve body; the valve stem drives the valve disc to move in the sleeve assembly, thereby adjusting the flow area of the valve; the sleeve assembly is composed of multi-stage sleeves , each layer of sleeves is provided with an equal number of orifices, and the positions of the orifices correspond to each other. The orifices of adjacent sleeves are arranged in an overlapping manner, and the medium flows through the overlapping area for throttling and decompression, and then enters the entire The space of the orifice realizes capacity expansion, and effectively realizes step-by-step decompression. The utility model effectively avoids flash steam and cavitation, thereby improving the service life of the regulating valve and reducing the noise of the valve.

Description

High pressure difference multi-stage sleeve regulating valve

technical field

The utility model relates to a high-pressure differential multi-stage sleeve regulating valve, which belongs to the field of thermal power and nuclear power valves.

Background technique

The high-pressure differential multi-stage sleeve regulating valve is installed in the steam-water system pipeline of thermal power and nuclear power units, and is an important equipment for regulating the flow, pressure and temperature of the medium.

At present, the sleeve-type control valves used in high-pressure differential conditions are not equipped with effective throttling and expansion space, or the flow channel is not set properly, failing to achieve the expected throttling, decompression, and noise reduction effects, resulting in flashing, Cavitation phenomenon reduces the service life of the valve.

The utility model adopts the dislocation arrangement of the orifice of the multi-layer sleeve to reduce the pressure and noise, and effectively solves the above problems.

Utility model content

The purpose of the utility model is to provide a high-pressure differential multi-stage sleeve regulating valve, which is suitable for high-pressure differential conditions, effectively avoids flashing and cavitation, and prolongs its service life.

In order to achieve the above purpose, the utility model provides a high-pressure difference multi-stage sleeve regulating valve, which includes a valve body (1), a valve seat (2), a valve disc (3), a sleeve assembly (4), a valve stem (5), bonnet (6), bolts (7). The valve body (1) and the bonnet (6) are connected by bolts (7), the bonnet (6) compresses the sleeve assembly (4), and the sleeve assembly (4) then compresses the valve seat (2).

The sleeve assembly used in the high-pressure differential multi-stage sleeve regulating valve is composed of three or more layers of sleeves, each layer of sleeves is provided with an equal number of orifices, and the positions of the orifices correspond to each other. . The orifices of adjacent sleeves are arranged in a staggered and overlapping manner, and the medium flows through the overlapping area for throttling and decompression, and then enters the entire orifice space to achieve capacity expansion.

The beneficial effect of the utility model is: the medium flows through the overlapping part of the throttle hole to realize throttling, and then expands through the entire throttle hole, and through the multi-stage throttling and capacity expansion of the sleeve assembly, it effectively realizes step-by-step pressure reduction, Slow down, avoid flashing and cavitation, effectively improve the service life of the control valve, reduce vibration and noise.

Description of drawings

Figure 1 is a structural schematic diagram of a high-pressure differential multi-stage sleeve regulating valve;

Figure 2 is a cross-sectional view of the sleeve assembly.

In the figure, 1. Valve body, 2. Valve seat, 3. Valve disc, 4. Sleeve assembly, 5. Valve stem, 6. Valve cover, 7. Bolt, 8. Round pin, 9. Sleeve

Detailed ways

In the embodiment shown in Figure 1, the valve cover 6 presses the sleeve assembly 4, and then presses the valve seat 2 on the valve body 1, and the valve stem 5 drives the valve disc 3 to move in the sleeve assembly 4 to adjust the valve's The flow area realizes the adjustment function of the valve.

As shown in FIG. 2 , the sleeve assembly 4 is composed of three or more layers of sleeves 9 cooperating and nesting, and circular pins 8 are used for positioning between the sleeves. Each layer of sleeves 9 is provided with an equal number of circular orifices, and the positions of the orifices correspond to each other. The throttling holes of adjacent sleeves are staggered and overlapped along the same direction of the circumference to form a medium flow channel with throttling and capacity expansion step by step.

The orifice disperses a single strand of high-energy medium into multiple strands of small-energy medium to reduce speed and noise, and realize step-by-step pressure reduction through the dislocation of the orifice to avoid flashing and cavitation. The final sleeve allows the medium to flow out along the tangential direction, preventing the medium from scouring the inner wall of the valve, thereby improving the performance and service life of the regulating valve.

Claims (2)

1. High Pressure Difference multi-stage sleeve modulating valve, is characterized in that: it comprises valve body (1), valve seat (2), flap (3), sleeve assembly (4), valve rod (5), valve gap (6), bolt (7).Valve body (1) and valve gap (6) adopt bolt (7) to be connected, valve gap (6) clamp sleeve assembly (4), and sleeve assembly (4) compresses valve seat (2) again.

2. High Pressure Difference multi-stage sleeve modulating valve according to claim 1, it is characterized in that: sleeve assembly (4) coordinates nested composition by three layers or three layers with upper bush, each layer sleeve is provided with the identical throttle orifice of quantity, and throttle orifice position one_to_one corresponding, the throttle orifice circumferentially same direction dislocation arranged superposed of adjacent sleeve.