CN204459330U - A kind of leading type overflow pressure-stabilizing valve - Google Patents

Abstract

The utility model discloses a pilot-operated overflow regulator valve, which comprises an adjusting hand wheel, a lock nut, a pilot valve sleeve, a cone valve core, a pilot valve spring, a cone valve head, a cone valve seat, a remote control port, a plug, a valve Cover, valve body, damping hole, main valve seat, oil outlet, oil inlet, main valve core, main valve spring, bolts, the adjustment hand wheel is connected with the locknut and the pilot valve sleeve respectively, the The cone valve core, pilot valve spring, cone valve head and cone valve seat are sequentially installed in the annular space inside the valve cover. The valve cover and the valve body are connected by bolts. The main valve spring is placed on the main valve core In the upper cylindrical hole. Beneficial effects: when the change of the pressure oil flow rate causes the spring compression to change, the pressure at the oil inlet does not change much, and the overflow and pressure stabilization performance is good. It can be applied to high-pressure and large-flow conditions. Independent, small pressure difference between opening and closing, strong unloading capacity, reasonable structure, easy to disassemble and maintain.

Description

A Pilot-operated Pressure Relief Valve

technical field

The utility model relates to a valve, in particular to a pilot-operated overflow regulator valve.

Background technique

The overflow valve is a kind of safety protection valve. Under normal circumstances, the valve is in a normally closed state under the action of external force, but when the pressure of the fluid medium in the equipment or pipeline rises above the set value, the valve will automatically open and flow to the equipment or pipeline. The fluid medium is discharged from the pipeline to prevent the normal operation of the equipment from being affected by excessive pressure inside the system. Ordinary direct-acting overflow regulator valves can only be used in low-pressure and small-flow conditions. When controlling high pressure or large flow, a hard spring with high rigidity is required. Not only is it difficult to manually adjust, but the opening of the valve port Slight changes will cause larger pressure fluctuations. Therefore, ordinary direct-acting overflow regulator valves are not suitable for use in occasions with large flow and high system pressure.

Utility model content

The purpose of this utility model is to propose a pilot-operated overflow and pressure-stabilizing valve for the problems that ordinary direct-acting relief valves and pressure-stabilizing valves are not suitable for use in occasions with large flow and high system pressure.

Its technical solution is: a pilot-operated overflow regulator valve, including adjusting handwheel, lock nut, pilot valve sleeve, cone valve core, pilot valve spring, cone valve head, cone valve seat, remote control port, plug, valve Cover, valve body, damping hole, main valve seat, oil outlet, oil inlet, main valve core, main valve spring, bolts, the adjustment hand wheel is connected with the locknut and the pilot valve sleeve respectively, the The cone valve core, pilot valve spring, cone valve head and cone valve seat are sequentially installed in the annular space inside the valve cover. The valve cover and the valve body are connected by bolts. The main valve spring is placed on the main valve core In the upper cylindrical hole, the main valve core and the main valve seat are placed in the annular space inside the valve body, and the main valve core is installed above the main valve seat, through the conical surface at the lower end and the conical surface at the upper end of the main valve seat. Cooperate.

The valve cover is provided with a straight oil passage and a curved oil passage, the straight oil passage is arranged on the left side of the cone valve seat, and the curved oil passage is arranged on the right side of the cone valve seat. The plug is installed at the right end, and the middle position of the main valve core is provided with two cylindrical holes with different diameters, and a damping hole is also provided on the main valve core.

The utility model has beneficial effects: when the change of the pressure oil flow causes the spring compression to change, the pressure of the oil inlet does not change much, and the overflow and pressure stabilization performance is good, which can be applied to high pressure and large flow conditions. Its pilot control part and main valve executive part are independent of each other, with small opening and closing pressure difference, strong unloading capacity, reasonable structure, and easy disassembly and maintenance.

Description of drawings

Fig. 1: the three-dimensional structure schematic diagram of a kind of pilot type overflow regulator valve of the present utility model;

Fig. 2: A schematic diagram of the overall structure of a pilot-operated overflow regulator valve of the present invention.

Symbol Description:

1. Adjusting hand wheel, 2. Lock nut, 3. Pilot valve sleeve, 4. Cone valve core, 5. Pilot valve spring, 6. Cone valve head, 7. Cone valve seat, 8. Remote control port, 9. Blockage , 10. Bonnet, 11. Valve body, 12. Damping hole, 13. Main valve seat, 14. Oil outlet, 15. Oil inlet, 16. Main valve core, 17. Main valve spring, 18. Bolt.

Detailed ways

Below in conjunction with accompanying drawing and example the utility model is described further:

As shown in Figure 1-2, the utility model is a pilot-operated overflow regulator valve, which includes an adjustment handwheel (1), a locknut (2), a pilot valve sleeve (3), a cone valve core (4), Pilot valve spring (5), cone valve head (6), cone valve seat (7), remote control port (8), plug (9), valve cover (10), valve body (11), damping hole (12), The main valve seat (13), the oil outlet (14), the oil inlet (15), the main valve core (16), the main valve spring (17), the bolt (18), and the adjustment handwheel (1) respectively Connected with the locknut (2) and the pilot valve sleeve (3), the cone valve core (4), pilot valve spring (5), cone valve head (6) and cone valve seat (7) are installed on the valve in sequence In the annular space inside the cover (10), the valve cover (10) is connected with the valve body (11) by bolts (18), and the main valve spring (17) is placed on the upper part of the main valve core (16). In the cylindrical hole, the main valve core (16) and the main valve seat (13) are placed in the annular space inside the valve body (11), and the main valve core (16) is installed above the main valve seat (13) , cooperate with the conical surface of main valve seat (13) upper end by the conical surface of lower end.

The valve cover (10) is provided with a straight oil passage and a curved oil passage, the straight oil passage is arranged on the left side of the cone valve seat (7), and the curved oil passage is arranged on the right side of the cone valve seat (7). , the right end of the inner annular space of the valve cover (10) is equipped with a plug (9), and the middle position of the main valve core (16) is provided with two cylindrical holes with different diameters, on the main valve core (16) Also offer a damping hole (12).

When the pilot-operated overflow regulator valve is working, the oil enters the lower chamber filled with the main valve core (16) from the oil inlet (15), and acts on the lower end of the main valve core (16), and at the same time, the oil passes through the damping hole ( 12) Enter and fill the upper cavity of the main valve core (16), and then enter and fill the cone valve head (6) through the curved oil passage on the valve cover (10) and the remote control port (8) on the cone valve seat (7) The oil acts on the upper end of the main valve core (16) and the right chamber cone surface of the cone valve head (6). When the oil pressure at the oil inlet (15) is low, it is less than the pilot valve spring (5) The elastic force of the pilot valve is closed, and the oil flowing through the orifice (12) does not form a passage. Now main spool (16) is in the lowermost position under the effect of upper and lower oil hydraulic pressure difference and spring force, and oil inlet (15) is blocked with oil outlet (14).

When the oil pressure at the oil inlet (15) is greater than the elastic force of the pilot valve spring (5), the cone valve head (6) moves to the left, and the pilot valve is in an open state, and the oil flowing through the damping hole (12) forms a passage . The oil flows through the straight oil channel on the bonnet (10) and then flows through the inner cylindrical hole channel of the main valve core (16), and finally flows out from the oil outlet (14). Due to the damping effect of the damping hole (12), the pressure at the lower part of the main spool (16) is greater than the pressure at the upper part, and the main spool (16) moves upward under the action of the pressure difference, and the main valve opens to realize overflow and pressure stabilization . In this process, the overflow pressure can be adjusted by adjusting the elastic force of the pilot valve spring (5).

Claims (2)

1. a leading type overflow pressure-stabilizing valve, is characterized in that: comprise adjusting handle (1), lock nut (2), guide's valve pocket (3), poppet valve core (4), pilot valve spring (5), cone valve head (6), conical valve base (7), remote control mouth (8), blocking (9), valve gap (10), valve body (11), damping hole (12), main valve seat (13), oil outlet (14), filler opening (15), main valve plug (16), main spool spring (17), bolt (18), described adjusting handle (1) is connected with lock nut (2) and guide's valve pocket (3) respectively, described poppet valve core (4), pilot valve spring (5), cone valve head (6) and conical valve base (7) are arranged in the inner annular space of valve gap (10) successively, described valve gap (10) is connected by bolt (18) with valve body (11), described main spool spring (17) is positioned in the Upper cylindrical hole of main valve plug (16), described main valve plug (16) and main valve seat (13) are positioned in the inner annular space of valve body (11), and main valve plug (16) is arranged on the top of main valve seat (13), coordinated by the conical surface of conical surface and main valve seat (13) upper end of lower end.

2. a kind of leading type overflow pressure-stabilizing valve according to claim 1, it is characterized in that: described valve gap (10) offers a straight oil duct and a curved oil duct, straight oil duct is located at the left side of conical valve base (7), curved oil duct is located at the right side of conical valve base (7), the right-hand member of described valve gap (10) interior annular space is installed with blocking (9), described main valve plug (16) neutral position offers the different cylindrical hole of two diameters, and main valve plug (16) has also been offered a damping hole (12).