CN201236991Y

CN201236991Y - High-pressure reducing valve

Info

Publication number: CN201236991Y
Application number: CNU2008201215443U
Authority: CN
Inventors: 李先辉
Original assignee: NINGBO XINGJIAN SPACE MANUFACTORY
Current assignee: Ningbo Xingjian Space Manufactory Inc.
Priority date: 2008-07-16
Filing date: 2008-07-16
Publication date: 2009-05-13
Anticipated expiration: 2018-07-16

Abstract

The utility model discloses a high-pressure reducing valve, which comprises a valve body, an intake passage, an air outgoing passage, a valve, a valve seat, a spring, a piston, a threaded rod and a gasket ring, wherein, the valve body is divided into an upper cavity, a middle cavity and a lower cavity. The high-pressure reducing valve is characterized in that the valve seat, a ring filter, the valve, a supplementary spring, a gasket, the gasket ring and a compression plug screw are arranged inside the lower cavity; a valve mandril of the reducing valve is also arranged in the middle cavity and is communicated with the air outgoing passage; and a relief valve device comprising a relief valve spring, a steel ball, a gland bush, a clack seat, a mandril and the gasket ring is arranged in the upper cavity. The high-pressure reducing valve has the advantages as follows: firstly, double functions and effects of the reducing valve and the relief valve can be achieved; and secondly, the installation man-hour is reduced, and the installation material is saved, thereby greatly lowering installation cost of the reducing valve and the relief valve.

Description

High-pressure pressure-reducing valve

Technical field:

The utility model relates to a kind of reduction valve, specifically is the reduction valve that is applied on pressurized gas (gases such as air that 55MPa is above or the nitrogen) pipeline.

Background technique:

Existing high-pressure pressure-reducing valve generally can only play decompression, and function ratio is more single, because its function ratio is more single, so after high-pressure pressure-reducing valve is installed on the high-pressure gas pipeline, from security consideration, also safety valve need be installed independently in addition on pipeline; Therefore, also safety valve will be installed when reduction valve is installed, the new safety valve of installing not only takies certain space, and increases installation work-hour and mounting material, thereby increases installation cost.

The model utility content:

The technical problems to be solved in the utility model is that a kind of high-pressure pressure-reducing valve that relief valve function also has the safety valve effect simultaneously that has is provided.

Technical solution of the present utility model is that a kind of high-pressure pressure-reducing valve with following structure is provided.This high-pressure pressure-reducing valve includes valve body, gas-entered passageway, outlet passageway, valve, valve base, spring, piston, screw rod, seal ring; Valve body is divided into three chambeies, upper, middle and lower, be characterized in: in the epicoele of described valve body, be provided with relief valve device, described relief valve device includes safety valve spring, steel ball, sealing gasket, safety valve valve seat, safety valve push rod, seal ring, comprises that also opening is at the outlet passageway upper wall and penetrate into the breeder tube of valve body epicoele; The safety valve spring seated connection is on the top of reduction valve piston central small hole, steel ball is put the top at safety valve spring, the safety valve valve seat block drops on the reduction valve piston, and safety valve push rod hypomere is put in the safety valve valve seat, and its upper end is by being threaded in the screw rod central through bore.

After adopting above structure, compared with prior art, the utility model high-pressure pressure-reducing valve has the following advantages:

1, has reduction valve and safety valve dual functions and effect are arranged;

When 2, reduction valve being installed safety valve has been installed also, has been reduced installation work-hour, saved mounting material, thereby reduced the installation cost of reduction valve and safety valve widely.

Description of drawings:

Fig. 1 is the utility model high-pressure pressure-reducing valve structural representation;

Fig. 2 is the valve structure schematic representation;

Fig. 3 is the utility model safety valve push rod structure schematic representation;

Fig. 4 is an A-A cross-sectional schematic among Fig. 3.

Shown in the figure: 1, valve body, 2, compress plug screw, 3, packing ring, 4, seal ring, 5, auxiliary spring, 6, valve base, 7, valve, 7-1, valve cast, 7-2, housing screw, 7-3, sealing gasket, 8, annular filter, 9, gas-entered passageway, 10, outlet passageway, 11, the spring case, 12, the safety valve valve seat, 13, main spring, 14, screw rod, 15, pad, 16, handwheel 17, handwheel cover, 17, nut, 18, thrust-bearing, 19, load nut, 20, the safety valve push rod, 21, locking nut, 22, steel ball, 22, safety valve spring, 23, piston, 24, cylinder body, 25, valve push rod, 26 outlet passageway apertures, 27 piston central small hole, 28, the case aperture, 20-1, inner hexagonal hole.

Embodiment:

The utility model is described in further detail below in conjunction with the drawings and specific embodiments:

Shown in Figure 1, include valve body 1, gas-entered passageway 9, outlet passageway 10, valve 7, valve base 6, main spring 13, auxiliary spring 5, piston 23, screw rod 14, seal ring and relief valve device;

Valve body 1 is divided into three chambeies, upper, middle and lower, valve base 6, annular filter 8, valve 7, auxiliary spring 5, packing ring 3, seal ring are housed in the cavity of resorption, compress plug screw 2, wherein valve base 6, compress on the plug screw 2 seal ring be housed; Compress plug screw 2 centers and be provided with blind hole, compress plug screw 2, compress plug screw 2 valve base 6, annular filter 8 are pressed on the valve body 1 by being threaded in valve body 1 cavity of resorption; Compress plug screw 2 tops and circumferentially have several holes.Shown in Figure 2, valve 7 is made up of valve cast 7-1, housing screw 7-2, sealing gasket 7-3, and housing screw 7-2 head has straight groove, and housing screw 7-2 is pressed on sealing gasket 7-3 on the valve cast 7-1 by screw thread; Valve 7 is linked in the auxiliary spring 5, and is placed in and compresses in plug screw 2 central blind holes, and valve 7 can slide in the blind hole that compresses plug screw 2 centers, and valve 7 heads are taper; The top of one sidewall of cavity of resorption has an inclined hole 29, and this inclined hole 29 communicates with gas-entered passageway 9.

The lumen of valve body 1 communicates with outlet passageway 10, and outlet passageway 10 upper walls are provided with aperture 26, and aperture 26 passes valve body 1 wall and communicates with epicoele, and reduction valve valve push rod 25 also is housed in the lumen.

Shown in Figure 1, cylinder body 24, piston 23, relief valve device, main spring 13, screw rod 14 are housed in the epicoele of valve body 1, load nut 19, thrust-bearing 18, spring case 11, handwheel 16.Cylinder body 24 is put in the epicoele bottom, and piston 23 is put in cylinder body 24 bottoms, and piston 23 lower ends contact with valve push rod 25, and piston 23 lower end surfaces have straight groove, and piston 23 centers are provided with aperture 27.Shown in Figure 1, relief valve device is installed in the main spring 13, between reduction valve piston tip and the reduction valve screw rod hypomere; Relief valve device includes safety valve spring 22, steel ball 30, sealing gasket, safety valve valve seat 12, safety valve push rod 20, seal ring, comprises that also opening is at outlet passageway 10 upper walls and penetrate into the breeder tube 26 of valve body epicoele; Safety valve spring 22 seated connections are on the top of reduction valve piston 23 central small hole 27, steel ball 30 is put the top at safety valve spring 22, safety valve valve seat 12 is pressed on sealing gasket in the piston 23 by screw thread, safety valve push rod 20 hypomeres are put in safety valve valve seat 12, its upper end is by being threaded in screw rod 14 central through bores, safety valve push rod 20 heads are processed with inner hexagonal hole 20-1, see Fig. 3, Fig. 4.The main spring 13 lower end seated connections of reduction valve are on reduction valve piston 23, the upper end of main spring 13 is equipped with and loads nut 19, whole relief valve device is put in main spring 13, screw rod 14 lower end center holes link to each other with safety valve push rod 20 by screw thread, the inner chamber of spring case 11 is a hexagon, spring case 11 middle parts are processed with outer logical aperture 28, its underpart is connected with the locking nut 21 of valve body 1 by screw thread, link to each other by thrust-bearing 18 between screw rod 14 and the spring case 11, be equipped with pad between spring case 11 and the handwheel 16, waist shaped hole on the handwheel 16 is enclosed within screw rod 14 tops, is fixed on the screw rod 14 by packing ring and nut 17, and handwheel cover 17 is housed on the handwheel 16.At ordinary times, the loading nut 19 in the reduction valve epicoele is in topmost, and main spring 13 is in releasing orientation; Valve 7 in the cavity of resorption is close to valve base 6 under the effect of auxiliary spring 5.

During work, the handwheel 16 on turn control reduction valve top, original place, the screw rod 14 that links to each other with handwheel 16 rotates thereupon, loading nut 19 on the screw rod 14 produces downward moving, compression main spring 13, the elastic force of main spring 13 promote piston 23 and move down, and 23 in piston drives valve push rod 25 and moves downward, back down valve 7, pressurized gas enter cavity of resorption by the inclined hole 29 on gas-entered passageway 9 and the valve body 1.Post-decompression gas enters valve body 1 epicoele by aperture 26 again, acts on the lower end of piston 23, with main spring 13 equilibrium of forces, enter outlet passageway 10 simultaneously.

Turn handwheel 16 can change the distance (being aperture) of valve 7 and valve base 6, thereby changes the outlet pressure of reduction valve.

When the reduction valve outlet pressure is higher than specified value because of certain reason, this pressed gas is along being flushed to the valve body epicoele on the aperture 26, pressure acts on the lower end of piston 23, give 23 1 increments that upward pressure of piston, promoting piston 23 moves upward, this moment, steel ball 30 was backed down by safety valve push rod 20, and pressure enters spring case 11 inner chambers along the gap between piston 23 center holes and steel ball 30 and the sealing gasket, and releases along the aperture on the spring case 11 28.

Behind the pressure removal that exceeds, piston 23 recovers initial position of setting up under the effect of main spring 13, and steel ball 30 is close to sealing gasket once more, and outlet pressure keeps setting.

When needs change the cracking pressure of safety valve, handwheel cover 16 be need only unload,, Fig. 3, Fig. 4 seen with the inner hexagonal hole 20-1 of inner hexagon spanner along through hole insertion safety valve push rod 20 heads at screw rod 14 centers, just can turn safety valve push rod 20 up and down, to adjust the pressure set points of safety valve.

Claims

1, a kind of high-pressure pressure-reducing valve includes valve body (1), gas-entered passageway (9), outlet passageway (10), valve (7), valve base (6), auxiliary spring (5), main spring (13), piston (23), screw rod (14), seal ring; Described valve body (1) is divided into three chambeies, upper, middle and lower, it is characterized in that: in the epicoele of described valve body (1), be provided with relief valve device, described relief valve device includes safety valve spring (22), steel ball (30), sealing gasket, safety valve valve seat (12), safety valve push rod (20), seal ring, comprises that also opening is at outlet passageway (10) upper wall and penetrate into the breeder tube (26) of valve body epicoele; Safety valve spring (22) seated connection is on the top of reduction valve piston (23) central small hole (27), steel ball (30) is put the top in safety valve spring (22), safety valve valve seat (12) is located on the reduction valve piston (23), safety valve push rod (20) hypomere is put in safety valve valve seat (12), and its upper end is by being threaded in screw rod (14) central through bore.

2, high-pressure pressure-reducing valve according to claim 1 is characterized in that: described relief valve device is installed in the described main spring (13), between reduction valve piston (23) top end and reduction valve screw rod (14) lower end surface.

3, high-pressure pressure-reducing valve according to claim 1 is characterized in that: described safety valve push rod (20) head is set to inner hexagonal hole (20-1).