CN208703142U - Depressurize shut-off valve - Google Patents

Abstract

The utility model relates to a kind of decompression shut-off valve, including valve body, flap, valve rod, valve deck, the runner of valve body uses upper entering and lower leaving structure；Mainly flap is located on the downside of valve seat, is connected between valve rod and flap using floating connection mechanism, and flap lower end surface is equipped with decompressor；The decompressor is made of spring and spring base, and spring base is mounted on body cavity bottom, and spring is mounted between flap lower end surface and spring base；The floating connection mechanism uses piston cylinder operator, in flap upper surface, piston cylinder is set, valve rod lower end is equipped with the piston with the dynamic cooperation of piston cylinder internal chamber wall, the diameter of piston is greater than stem diameter, piston axial length is less than the axial length of piston cylinder inner cavity, one gland is installed between piston upper surface and piston cylinder periphery, is fixedly connected between gland and piston cylinder periphery.It is simple with circuit design, the advantages that equipment installation cost is low, flow resistance and the small pressure loss.

Description

Depressurize shut-off valve

Technical field

The utility model belongs to valve field more particularly to a kind of decompression, cut-off, non-return, adjusts combined valve.

Background technique

Pressure reducing valve is that import pressure medium is exported the pressure medium for being suitble to user to use after decompression, in decompression medium It in pipe-line system, needs that block valve is installed in pressure reducing valve above or below, when needing to close pipeline medium circulation, by block valve It closes, cuts off flow of media.So at least needing to install the two deck valve doors including pressure reducing valve on general pipeline.Especially exist In steam turbine or pumping plant outlet ductwork, medium flows backwards damage steam turbine and pumping unit in order to prevent, it is also necessary in steam turbine With one check-valves of installation on pump discharge pipeline, need to install three deck valve doors altogether.Increase the complexity and equipment of circuit design Installation cost, and increase pipeline flow resistance, increase pressure loss in piping.

Summary of the invention

The purpose of this utility model is for disadvantage of the existing technology, provides a kind of collection decompression and ends, non-return function It can simplify circuit design in one, reduce equipment installation cost, the decompression shut-off valve that flow resistance is low, the pressure loss is small.

The technical solution of the utility model includes valve body, flap, valve rod, valve deck, in valve body import channel and exit passageway Between valve chamber in valve seat is set, which, which has, uses upper entering and lower leaving with the mutually matched sealing surface of flap, the runner of valve body Structure, valve rod lower end are connect with flap upper surface；Mainly flap is located on the downside of valve seat, using the company of floating between valve rod and flap Connection mechanism connection, flap lower end surface are equipped with decompressor；The decompressor is made of spring and spring base, and spring base is mounted on Body cavity bottom, spring are mounted between flap lower end surface and spring base；The floating connection mechanism uses piston cylinder operator, Piston cylinder is set in flap upper surface, valve rod lower end is equipped with the piston with the dynamic cooperation of piston cylinder internal chamber wall, and the diameter of piston is greater than Stem diameter, piston axial length are less than the axial length of piston cylinder inner cavity, pacify between piston upper surface and piston cylinder periphery A gland is filled, is fixedly connected between gland and piston cylinder periphery.

Preferably, regulating device is equipped between spring base and valve body.

Preferably, the regulating device uses installation and adjustment screw rod, adjusting screw rod between spring base lower end surface and valve body Dynamic sealing cooperates between periphery and valve body.

The utility model has the advantages that integrating decompression, pressure regulation, cut-off, check function, circuit design is simplified, is reduced Equipment installation cost, reduces valve arrangement to the flow resistance and the pressure loss of medium.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

Specific embodiment

Decompression shut-off valve as shown in Figure 1, including valve body 1, flap 2, valve rod 6, valve deck 7 in 1 intake channel of valve body and go out Valve seat 8 is set in the valve chamber between mouth channel, which has adopts with the mutually matched sealing surface of flap 2, the runner of valve body 1 With upper entering and lower leaving structure, i.e. medium flows on the upside of valve seat 8, and downside outflow, 6 lower end of valve rod is connect with 2 upper surface of flap；It is special Sign is that flap 2 is located at 8 downside of valve seat, is arranged between the 8 lower end surface runner mouth of upper surface and valve seat of flap 2 mutually matched close Cover is connected between valve rod 6 and flap 2 using floating connection mechanism, and 2 lower end surface of flap is equipped with decompressor；The decompression dress It sets including spring 9 and spring base 10, spring base 10 is mounted on 1 intracavity bottom of valve body, and spring 9 is mounted on 2 lower end surface of flap and bullet Between spring abutment 10；The floating connection mechanism uses piston cylinder operator, piston cylinder 3 and valve rod 6 including the setting of 2 upper surface of flap The piston 5 with the dynamic cooperation of 3 internal chamber wall of piston cylinder of lower end setting, piston cylinder 3 and flap 2 use and are integrally machined molding, living Plug 5 uses integral structure with valve rod 6, and the diameter of piston 5 is greater than 6 diameter of valve rod, and 5 axial length of piston is less than 3 inner cavity of piston cylinder Axial length, guarantee flap 2 have enough apertures, a gland 4 is installed between 3 periphery of 5 upper surface of piston and piston cylinder, press It is fixedly connected between lid 4 and 3 periphery of piston cylinder, piston 5 can be limited in by piston using the connection that is screwed between the two 3 inner cavity of cylinder is mobile.Flap 2 and valve seat 8 can be pressed tight sealing engagement when rising by valve rod 6, play the role of shut-off valve；Under valve rod 6 It drops to when piston 5 being made to drop to 3 intracavity bottom of piston cylinder, spring 9 subtracts the upwards thrust of flap 2 to the generation of import pressure medium Pressure, plays the role of pressure reducing valve；When medium refluence occurs, the thrust collective effect of pressure medium and spring 9 is automatic by flap 2 It closes, prevents medium from flowing backward damage equipment, play the role of check-valves.Piston cylinder 3 is equipped with discharge orifice, guarantees the light shifting of piston 5 It is dynamic, the center line coincidence of valve rod 6, piston 5, piston cylinder 3, flap 2, spring base 10.

It is equipped with regulating device between spring base 10 and valve body 1, passes through 9 elastic force of regulating device adjustment spring, adjustment outlet Pressure plays adjusting valve action.

The regulating device uses installation and adjustment screw rod 11, adjusting screw rod 11 between 10 lower end surface of spring base and valve body 1 Dynamic sealing cooperates between periphery and valve body 1, and protective cover 12 is arranged on the valve body 1 in 11 lower end of adjusting screw rod and outside, prevents Adjusting screw rod 11 is by mistuning section.

Claims (3)

1. a kind of decompression shut-off valve, including valve body (1), flap (2), valve rod (6), valve deck (7), valve body (1) intake channel with Valve seat (8) are set in valve chamber between exit passageway, which has and flap (2) mutually matched sealing surface, valve body (1) runner uses upper entering and lower leaving structure, and valve rod (6) lower end is connect with flap (2) upper surface；It is characterized in that flap (2) is located at On the downside of valve seat (8), mutually matched sealing surface, valve are set between the upper surface and valve seat (8) lower end surface runner mouth of flap (2) It is connect between bar (6) and flap (2) using floating connection mechanism, flap (2) lower end surface is equipped with decompressor；The decompressor Including spring (9) and spring base (10), spring base (10) is mounted on valve body (1) intracavity bottom, and spring (9) is mounted on flap (2) Between lower end surface and spring base (10)；The floating connection mechanism uses piston cylinder operator, including the setting of flap (2) upper surface The piston (5) with the dynamic cooperation of the piston cylinder (3) internal chamber wall of piston cylinder (3) and the setting of valve rod (6) lower end, piston cylinder (3) with Flap (2) uses integral structure using molding, piston (5) and valve rod (6) are integrally machined, and the diameter of piston (5) is greater than valve rod (6) Diameter, piston (5) axial length are less than the axial length of piston cylinder (3) inner cavity, piston (5) upper surface and piston cylinder (3) outer circle It installs between face a gland (4), is fixedly connected between gland (4) and piston cylinder (3) periphery.

2. decompression shut-off valve according to claim 1 is adjusted it is characterized in that being equipped between spring base (10) and valve body (1) Device.

3. decompression shut-off valve according to claim 2, it is characterized in that the regulating device is used in spring base (10) lower end Installation and adjustment screw rod (11) between face and valve body (1), dynamic sealing cooperates between adjusting screw rod (11) periphery and valve body (1).