CN206513850U - A kind of multi-functional pressure/flow control valve for having good sealing property concurrently - Google Patents

Abstract

The utility model discloses a kind of multi-functional pressure/flow control valve for having good sealing property concurrently, apply in feed pump turbine high pressure standby steam source, the control valve includes valve, hydraulic actuating mechanism and the support frame for connecting valve and hydraulic actuating mechanism；Valve includes valve body, in valve body and the valve seat and sleeve and valve rod that are sequentially connected；The position connected on sleeve with valve body import and valve seat is designed with some sieve apertures；Sleeve coordinates with the valve plug that valve stem end is installed；Valve rod extends valve body and is connected with providing the hydraulic actuating mechanism of driving force；Hydraulic actuating mechanism includes oil cylinder piston component and hydraulic control module；Hydraulic control one-way valve and inserted valve are connected through pressure release check valve with security personnel's oil pipe line.The utility model control valve can realize the unlatching of valve, closing, quick closing valve, regulation, protect bit function, and a variety of functions are integrated in into a valve control system, system architecture is not only simplify, reduces maintenance difficulty, while being greatly reduced production and maintenance cost.

Description

A kind of multi-functional pressure/flow control valve for having good sealing property concurrently

Technical field

The utility model belongs to valve technology field, is related to a kind of multi-functional pressure/flow control for having good sealing property concurrently Valve processed.

Background technology

Pressure/flow control valve, which can be used for realizing, to be controlled the pressure/flow of liquid or gas, and it normally only has single Adjusting function, such as regulation, water conservancy diversion, quick closing valve；However, some valves, such as apply to boiler feed pump turbine high voltage standby With the valve on jet chimney, to be not only responsible for, when the vapour source that works can not meet system worked well, high voltage standby being steamed Vapour source adjusts (decompression) by pressure and safely accessed in water pump steam turbine, to meet the normal work of system, while working as system Meeting also can rapidly close high voltage standby vapour source after operating pressure, be switched to normal work vapour source to maintain system just Often operation, so both having needed the control valve with regulatory function in such field, needs with work(such as open and close, quick closing valves again The control valve of energy, is so accomplished by arranging polytype control valve and pipeline in valve control system, not only causes valve control system Structure is numerous and jumbled, maintenance difficult, and adds valve control system manufacture and maintenance cost.Therefore, design is a can both realize tune The pressure/flow control valve of a variety of functions such as section, quick closing valve, tool is of great significance.

In addition, although it is contemplated that sealing between partial component in conventional valve design, but due to by difficulty of processing with And the influence of processing cost, it seals grade and is difficult to reach requirement, particularly after prolonged erosion, its sealing property It can be severely impacted, so that the service life of valve is greatly shortened.

Utility model content

The purpose of this utility model is intended to for of the prior art that not enough there is provided a kind of many work(for having good sealing property concurrently Energy pressure/flow control valve, regulation, quick closing valve can be realized simultaneously and the functions such as position are protected.

In order to achieve the above object, the utility model provides a kind of multi-functional pressure/flow for having good sealing property concurrently Control valve, the control valve includes valve, hydraulic actuating mechanism and the support frame for connecting valve and hydraulic actuating mechanism；It is described Valve includes valve body, in valve body and the valve seat and sleeve and valve rod that are sequentially connected；With valve body import on the sleeve The position connected with valve seat is designed with some sieve apertures；The sleeve coordinates with the valve plug that valve stem end is installed；The valve rod extension Go out valve body and be connected with providing the hydraulic actuating mechanism of driving force；The hydraulic actuating mechanism includes oil cylinder-piston component and hydraulic pressure Control module；Oil cylinder-the piston component provides driving force for valve, and its piston rod is connected with stretching out the valve rod of valve body；It is described Oil sources moves towards so that oil cylinder-piston rod assembly motion, including quick closing valve magnetic valve, hydraulic control list in hydraulic control module control oil pipe road To valve, inserted valve, servo valve, pressure release check valve；During the quick closing valve magnetic valve dead electricity, an interface is connected with inserted valve, another Individual to be connected through filter with in-line, when the quick closing valve magnetic valve obtains electric, an interface is connected with inserted valve, another interface It is connected with return line；The inserted valve is respectively connecting to oil cylinder and return line in oil cylinder-piston rod assembly；The servo When valve obtains positive electricity, an interface is connected through normally open solenoid valve with the oil cylinder in oil cylinder-piston rod assembly, another through filter with In-line is connected, when the servo valve obtains negative electricity, and an interface is through the oil cylinder in normally open solenoid valve and oil cylinder-piston rod assembly Connection, another interface is connected with return line, and during the servo valve dead electricity, total interface is off；The hydraulic control Check valve and inserted valve are connected through pressure release check valve with security personnel's oil pipe line.

Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, the oil cylinder is connected with oil return pipe.

Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, the hydraulic actuating mechanism also includes electric Control module, the electric control module is used to receive from outside control signal and sends control signal to each magnetic valve.

Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, the valve seat is venturi valve seat, and by valve The part and valve seat that seat is contacted with medium carry out stellite cure process with valve plug contact portion, plate one layer of setting thickness With the stellite of hardness, so as to increase the hardness of valve seat, anti-cavitation, resistance to erosion ability, in order to avoid due to prolonged erosion, Influence the sealing property between valve seat and valve plug；Connected between the valve seat and valve body by welding manner, so as to reduce Interior leak source；Offer U-type groove in valve body and valve seat junction, and U-type groove is spaced apart, so either welding deformation is still Valve seat is deformed, and U-type groove can provide elastic supplement, sealing is more stablized and reliable.

At the top of the above-mentioned multi-functional pressure/flow control valve for having good sealing property concurrently, support frame as described above machine is performed with hydraulic pressure Structure is connected, and bottom is connected by bonnet and valve body；The valve rod penetrated in support frame penetrates support frame with oil cylinder-piston rod assembly Piston rod is connected；The upper cover of piston rod penetrated in support frame is connected to spring；The upper end of the spring is abutted with support frame top, under Hold and abutted with the bracket installed on the piston rod；The bracket is consolidated with the slide plate on the displacement transducer on support frame Even.The driving of oil cylinder-piston rod assembly resets to realize by the compression of the oil sources in in-line and spring, enters Oil sources in oil pipe line promotes piston rod to move up, and moving up for piston rod can make spring be in compressive state, in oil When hydraulic oil in cylinder flows back, piston rod can be made to return to original position under the effect of spring power.What the utility model was used It is linear displacement transducer, can be used for the displacement for measuring valve rod, and the signal of collection is fed back into electric control module, Electric control module can send instruction according to the current status of valve, so as to further operate the action of valve.

Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, in order to increase the close of valve plug and sleeve connection Feng Xing, has sealing surface in the upper design of valve plug and sleeve connection, and sealing surface is by valve plug upper end ring-shaped step and sleeve lining Between the sealing ring, the first back-up ring and elastic second back-up ring that set gradually constitute；The sealing ring is expanded graphite；Described second Back-up ring is caught in the neck of valve plug upper end design.By above-mentioned Seal Design, the leakage class of sealing surface can reach V grades of ANSI.

Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, in order to further improve the sealing of valve Can, the cavity and sleeve that the bonnet is formed with docking sleeve, which are docked with valve body in the cavity to be formed, is provided with metal sawtooth Pad；Simple metal sawtooth pad, which combines simple metal pad, can bear the excellent properties and grooved metal gasket of higher temperature and pressure Few advantage is contacted with sealing surface, thus it can reach very high seal pressure, so as to reduce the pretightning force of fastening bolt；This Outside, simple metal sawtooth pad also possesses good mechanical performance, heat conductivity, heat resistance, resistance to pressure, corrosion resistance.

Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, by double filler realize valve stem seal without Leakage, makes sealing more stablize, reliably, specific implementation is that the upper end of the bonnet is fixed with hold-down grid；The filler The first filler, lantern sleeve, the second filler and packing ring, the filler are disposed with the cavity of pressing plate, bonnet and valve rod formation Gland is provided between pressing plate and the first filler；First filler and the conventional selection that the second filler is this area, first fills out Material and the second filler can be with identical, can also be different.

When oil pressure of ensuring public security is normal, the above-mentioned multi-functional pressure/flow control valve for having good sealing property concurrently not only has valve concurrently Men Kai, valve are closed, valve quick closing valve function, and the function of position is also protected with valve regulated, valve, and its operating process includes：

(1) valve opening：Quick closing valve magnetic valve is not charged, and the hydraulic oil of power oil pump is through oil inlet pipe, quick closing valve magnetic valve to inserting Fill the control chamber of valve, inserted valve closure；Hydraulically-controlled one-way valve is opened simultaneously, when servo valve receives valve opening signal, and its oil-feed is led to Road is connected, and the hydraulic oil of power oil pump enters oil cylinder through oil inlet pipe, servo valve, and in-oil cylinder piston rod is lifted up, at spring In compressive state, so that with ovable valve stem lifting, valve opening.

(2) valve is closed：Quick closing valve magnetic valve is not charged, control chamber of the hydraulic oil through quick closing valve magnetic valve to inserted valve, inserting Valve is closed；Hydraulically-controlled one-way valve is opened simultaneously, and when servo valve receives pass valve signal, its way to cycle oil is connected, and hydraulic oil passes through Servo valve is back to hydraulic oil container by oil cylinder through oil return pipe, now, and the spring reset in compression, in-oil cylinder piston rod is downward Mobile, so as to be moved down with ovable valve stem, valve is closed.

(3) valve quick closing valve：The oil that quick closing valve magnetic valve is obtained in electric commutation, the control chamber of inserted valve is passed through back by quick closing valve magnetic valve Oil pipe is back to hydraulic oil container, while hydraulic control one-way valve pilot port decompression, blocks servo valve oil-feed path, is now in compression Spring reset, in-oil cylinder oil is back to hydraulic oil container through inserted valve, oil return pipe, and in-oil cylinder piston rod is moved down, so that Band ovable valve stem is moved down, and valve realizes quick closing valve；In addition, when oil inlet pipe oil inlet decompression, so as to cause hydraulic control one-way valve guide Mouth decompression, blocks servo valve oil-feed path, is now in the spring reset of compression, and in-oil cylinder oil is returned through inserted valve, oil return pipe Hydraulic oil container is back to, in-oil cylinder piston rod is moved down, so as to be moved down with ovable valve stem, valve also realizes quick closing valve.

(4) valve regulated：Quick closing valve magnetic valve is not charged, and the hydraulic oil of power oil pump is through oil inlet pipe, quick closing valve magnetic valve to inserting Fill the control chamber of valve, inserted valve closure；Hydraulically-controlled one-way valve is opened simultaneously, and when servo valve receives valve regulated signal, it enters Oily path is switched on or switched off, and its operation principle is identical with (1) or (2), so as to realize the function of valve position regulation.

(5) valve protects position：When servo valve receives the instructions such as valve opening, closing, regulation and signal, normally open solenoid valve Band is conducted simultaneously, it is ensured that servo valve oil circuit is unimpeded；When valve regulated in place after, normally open solenoid valve dead electricity blocks oil circuit so that It is held in place valve；In addition, when servo valve adjustment work accident dead electricity, normally open solenoid valve dead electricity, block oil circuit so that Valve is held in place, realizes that valve protects position.

When ensuring public security oil sources decompression, the oil of the control chamber of inserted valve and hydraulic control one-way valve pilot port is by letting out on oil pipe of ensuring public security Check valve is pressed to open, while valve realizes quick closing valve.

Compared with prior art, the utility model has the advantages that：

(1) the utility model have concurrently good sealing property multi-functional pressure/flow control valve can realize valve unlatching, A variety of functions are integrated in a valve control system, compared to cloth in existing valve control system by the functions such as closing, quick closing valve, regulation, guarantor position Polytype control valve and pipeline are put, system architecture is not only simplify, reduces maintenance difficulty, while being greatly reduced life Production and maintenance cost.

(2) the utility model has multi-functional pressure/flow control valve of good sealing property concurrently and is primarily adapted for use in boiler feedwater The high voltage standby of mercury vapour turbine can quickly be responded, to realize to high voltage standby recruitment with work steam source pipe road according to instruction Make the decompression, unlatching and quick closedown of vapour source, make the steam pressure substantially constant into feed pump turbine；And can be according to finger The throttle flow of order regulation steam turbine, to meet the power demand of boiler feed pump.

(3) the utility model has multi-functional pressure/flow control valve of good sealing property concurrently, passes through what is set before servo valve Hydraulic control one-way valve, can be connected according to pilot port pressure change or disconnect oil circuit, so that servo valve avoids producing maloperation, Influence valve event.

(4) the utility model has multi-functional pressure/flow control valve of good sealing property concurrently, is provided with security personnel's oil pipe and lets out Check valve is pressed, so as to realize in the case of security personnel's oil sources decompression, rapid-closure damper.

(5) the utility model has multi-functional pressure/flow control valve of good sealing property concurrently, by multi-sealed design, Improve the sealing stability and reliability of valve.

Brief description of the drawings

Fig. 1 is the structural representation for the multi-functional pressure/flow control valve for having good sealing property concurrently.

Fig. 2 is part A enlarged diagram in Fig. 1.

Fig. 3 is part B enlarged diagram in Fig. 1.

Fig. 4 is C portion enlarged diagram in Fig. 1.

Fig. 5 is D enlarged schematic partial views in Fig. 1.

Fig. 6 is the principle schematic of hydraulic control.

Fig. 7 is the application schematic diagram for the multi-functional pressure/flow control valve for having good sealing property concurrently.

Wherein, 1, valve body, 2, valve plug, 3, sealing ring, the 4, first back-up ring, the 5, second back-up ring, 6, sleeve, 7, metal sawtooth Pad, 8, bonnet, 9, hold-down grid, 10, gland, the 11, first filler, 12, lantern sleeve, the 13, second filler, 14, packing ring, 15th, valve rod, 16, flange, 17, valve seat, 18, U-type groove, 19, support frame, 20, displacement transducer, 21, spring, 22, hydraulic pressure performs Mechanism, 2201, oil cylinder, 2202, piston rod, 2203, quick closing valve magnetic valve, 2204, inserted valve, 2205, servo valve, 2206, normally opened Magnetic valve, 2207, hydraulic control one-way valve, 2208, pressure release check valve, 2209, filter.

Embodiment

The utility model is further described below in conjunction with accompanying drawing：

The utility model provide the multi-functional pressure/flow control valve for having good sealing property concurrently, structure as shown in figure 1, The control valve includes valve, hydraulic actuating mechanism 22 and the support frame 19 for connecting valve and hydraulic actuating mechanism 22；Hydraulic pressure Executing agency 22 includes oil cylinder-piston rod assembly, hydraulic control module and electric control module.

As shown in figure 1, valve includes valve body 1, valve plug 2, sleeve 6, bonnet 8, valve rod 15 and valve seat 17；The import of valve body 1 It is L-shaped with exporting, and be connected respectively by flange 16 with external equipment realization；Valve seat 17 and sleeve 6 are sequentially connected and along outlet Place direction is arranged in valve body 1；The position connected on sleeve 6 with valve body import and valve seat is designed with some sieve apertures；The set The valve plug 2 that cylinder 6 is installed with the end of valve rod 15 coordinates, and drives valve plug 2 to move up and down by valve rod 15, and then adjusts by sleeve The sieve aperture quantity connected with valve body import and valve seat, so as to reach the effect of control flow；The upper end of sleeve 6 is provided with and valve rod 15 Cooperation carries out sealed bonnet 8 to sleeve 6 and valve rod 15；Bonnet 8 is connected with the lower end of support frame 19 by bolts and nuts realization, Valve rod 15 stretches out bonnet 8 and penetrated in support frame 19.

As shown in Fig. 2 valve seat 17 is venturi valve seat, and the part that valve seat 17 is contacted with medium and valve seat 17 and valve Fill in 2 contact portions and carry out stellite cure process, the Si Taili that plating a layer thickness 2mm-3mm, hardness are more than HRc42 is closed Gold；Connected between valve seat 17 and valve body 1 by welding manner, so as to reduce interior leak source；In valve body 1 and the junction of valve seat 17 U-type groove 18 is offered, so either welding deformation or valve seat 17 are deformed, and U-type groove 18 can provide elastic supplement, are made close Envelope is more stablized and reliable.

As shown in figure 3, having sealing surface in valve plug 2 and the upper design that sleeve 6 is connected, sealing surface is by the top ring of valve plug 2 Sealing ring 3, the first back-up ring 4 and elastic second back-up ring 5 set gradually between shape step and sleeve lining is constituted；Sealing ring 3 is Expanded graphite；Second back-up ring 5 is caught in the neck of the upper end of valve plug 2 design, passes through above-mentioned Seal Design, the leakage class of sealing surface It can reach V grades of ANSI.

As shown in figure 4, the cavity formed is docked with sleeve 6 for bonnet 8 and sleeve 6 is docked with valve body 1 in the cavity formed It is provided with metal sawtooth pad 7；Simple metal sawtooth pad, which combines simple metal pad, can bear the excellent of higher temperature and pressure Different in nature energy and grooved metal gasket contact few advantage with sealing surface, thus it can reach very high seal pressure, so as to reduce The pretightning force of fastening bolt；In addition, simple metal sawtooth pad also possess good mechanical performance, it is heat conductivity, heat resistance, pressure-resistant Property, corrosion resistance.

As shown in figure 5, the upper end of bonnet 8 is fixed by being fixed with hold-down grid 9, hold-down grid 9 by bolt with bonnet 8 Connection；The first filler 11, lantern sleeve 12 are disposed with the cavity of hold-down grid 9, bonnet 8 and the formation of valve rod 15, second is filled out Gland 10 is provided between material 13 and packing ring 14, the filler 11 of hold-down grid 9 and first；First filler 11 and the second filler 13 It is soft graphite.

As shown in figure 1, hydraulic actuating mechanism 22 is connected with the top of support frame 19, oil cylinder-piston rod assembly therein includes Oil cylinder 2201 and with the matching used piston rod of oil cylinder 2202；The piston rod 2202 is penetrated in support frame 19, and and valve rod 15 are fixedly connected；Penetrate on the piston rod 2202 in support frame 19 and be socketed with spring 21；The upper end of spring 21 and support frame top Abut, lower end is abutted with the bracket on piston rod 2202；Bracket and the displacement transducer 20 on support frame 19 On slide plate be connected.The displacement transducer 20 that the utility model is used is linear displacement transducer.

As shown in fig. 6, oil sources is moved towards so that oil cylinder-piston rod assembly motion in hydraulic control module control oil pipe road；Liquid Control module is pressed to include quick closing valve magnetic valve 2203, inserted valve 2204, servo valve 2205, normally open solenoid valve 2206, hydraulic control one-way valve 2207, pressure release check valve 2208, filter 2209.The dead electricity of quick closing valve magnetic valve 2203 obtains electric working condition difference, and access port is not Together, during 2203 dead electricity of quick closing valve magnetic valve, an interface is connected with inserted valve 2204, and another interface is through filter 2209 and oil-feed Pipeline X L1 connections；When quick closing valve magnetic valve 2203 obtains electric, an interface is connected with inserted valve 2204, another interface and oil return pipe Connection.Inserted valve 2204 is further connected to oil cylinder 2201 and return line Y L2 in addition to being connected with quick closing valve magnetic valve 1303. Servo valve 2205 is different according to working condition, and access port is then different, when servo valve 2205 obtains positive electricity (such as 0~40mA), servo Valve 2205 obtains valve opening signal, and an interface is connected through normally open solenoid valve 2206 with hydraulic jack 2201, and another interface passes through Filter 2209 is connected with in-line X L1；When servo valve 2205 obtains negative electricity (such as -40mA~0), servo valve 2205 is closed Valve signal a, interface is connected through normally open solenoid valve 2206 with hydraulic jack 2201, and another interface connects with return line YL2 Connect；During 2205 dead electricity of servo valve, servo valve is closed, and is not connected with any pipeline.Hydraulic control one-way valve 2207 and inserted valve 2204 are passed through Pressure release check valve 2208 is connected with security personnel oil pipe line Z L3.Oil cylinder 2201 is further connected with return line Y L2.Filter 2209 are arranged on the outside of support frame 7, and it is connected with in-line stop valve and in-line hydraulic control one-way valve 2207 respectively.Oil-feed Oil in pipe generally has impurity, if things go on like this servo valve 1305 can be caused to block, and filter 2209 was then played The effect of oily impurity in oil inlet pipe is filtered, its entrance point is connected with in-line, the port of export is connected with servo valve 2205 and in connection Hydraulic control one-way valve 2207 is set up in pipeline and is convenient for measuring oil pressure with pressure gauge；Other filter 2209 is double filter core band alarm dresses Put, when a filter core has filtered enough impurity, then warning reminding changes filter core to warning device, and be that can for the effect of double filter cores Realize online filter core of changing without influenceing the normal work of control valve and running.

Above-mentioned electric control module is used to receive from outside control signal and sends control signal to each valve；Should Electric control module can be realized using the conventional meanses of this area disclosure.

The course of work of the multi-functional pressure/flow control valve for having good sealing property concurrently of the present embodiment is：

When oil pressure of ensuring public security is normal, its operating process includes：

(1) valve opening：Quick closing valve magnetic valve 2203 is not charged, and the hydraulic oil of power oil pump is through in-line X L1, quick closing valve Magnetic valve 2203 is to the control chamber of inserted valve 2204, and inserted valve 2204 closes；Hydraulically-controlled one-way valve 2207 is opened simultaneously, works as servo valve 2205 when receiving valve opening signal, and its oil-feed path is connected, and the hydraulic oil of power oil pump is through in-line X L1, servo valve 2205 Into oil cylinder 2201, in-oil cylinder piston rod 2202 is lifted up, and spring 21 is in compressive state, so as to be carried with ovable valve stem 15 Rise, valve opening.

(2) valve is closed：Quick closing valve magnetic valve 2203 is not charged, and hydraulic oil is through quick closing valve magnetic valve 2203 to inserted valve 2204 Control chamber, inserted valve 2204 is closed；Hydraulically-controlled one-way valve 2207 is opened simultaneously, when servo valve 2205 receives pass valve signal, its Way to cycle oil is connected, and hydraulic oil is back to hydraulic oil container through return line Y L2 by oil cylinder by servo valve 2205, now, is in The spring 21 of compression is resetted, and in-oil cylinder piston rod 2202 is moved down, so as to be moved down with ovable valve stem 15, valve is closed.

(3) valve quick closing valve：The oil that quick closing valve magnetic valve 2203 is obtained in electric commutation, the control chamber of inserted valve 1304 passes through fast powered-down Magnet valve 2203 is back to hydraulic oil container through return line Y L2, while the pilot port decompression of hydraulic control one-way valve 2207, blocks servo valve 2205 oil-feed paths, the spring 21 for being now in compression is resetted, and in-oil cylinder oil is returned through inserted valve 2204, return line Y L2 To hydraulic oil container, in-oil cylinder piston rod 2202 is moved down, so as to be moved down with ovable valve stem 15, valve realizes quick closing valve；This Outside, when in-line X L1 oil inlet decompressions, so as to cause the pilot port decompression of hydraulic control one-way valve 2207, block servo valve 2205 and enter Oily path, the spring 21 for being now in compression is resetted, and the oil in oil cylinder 2201 is back to through inserted valve 2204, return line Y L2 Hydraulic oil container, in-oil cylinder piston rod 2202 is moved down, so as to be moved down with ovable valve stem 15, valve also realizes quick closing valve.

(4) valve regulated：Quick closing valve magnetic valve 2203 is not charged, and the hydraulic oil of power oil pump is through in-line X L1, quick closing valve Magnetic valve 2203 is to the control chamber of inserted valve 2204, and inserted valve 2204 closes；Hydraulically-controlled one-way valve 2207 is opened simultaneously, works as servo valve 2205 when receiving valve regulated signal, its oil-feed path or is switched on or switched off, and its operation principle is identical with (1) or (2), So as to realize the function of valve position regulation.

(5) valve protects position：When servo valve 2205 receives the instructions such as valve opening, closing, regulation and signal, normally opened electricity Band is conducted magnet valve 2206 simultaneously, it is ensured that the oil circuit of servo valve 2205 is unimpeded；When valve regulated in place after, normally open solenoid valve 2206 loses Electricity, blocks oil circuit, so that valve is held in place；In addition, when 2205 adjustment work of servo valve accident dead electricity, normally opened electromagnetism The dead electricity of valve 2206, blocks oil circuit, so that valve is held in place, realizes that valve protects position.

When ensuring public security oil sources decompression, the control chamber of inserted valve 2204 and the oil of the pilot port of hydraulic control one-way valve 2207 will security personnel's oil Pressure release check valve 2208 on pipeline is opened, while valve realizes quick closing valve.

The groundwork medium of the multi-functional pressure/flow control valve is steam, and it is applied to boiler feed pump turbine Schematic diagram it is as shown in Figure 7.For boiler feed pump turbine, the pressure on its jet chimney after stop valve and regulating valve is usual A standard value can be set, but the operating on low voltage vapour source of access stop valve is difficult to ensure that the flow of entrance water pump steam turbine always Meet the standard value of setting；In order to meet the setting standard value, it is necessary to high pressure standby steam source coordinate, make both switch use with Meet the safe operation of steam turbine；High pressure standby steam source is switched fast in order to realize, in the high voltage standby of feed pump turbine Multi-functional pressure/flow control valve that overall decompression is carried out to high-pressure work vapour source with being provided with steam pipe, is responsible for high pressure In reserve steam secure accessing water pump steam turbine；So when operating on low voltage vapour source can not meet system worked well, Neng Gouxun Speed is switched to high pressure standby steam source to ensure that system is normally run；And after the vapour source that steam is provided for steam turbine meets requirement, Control valve rapid-closure damper is needed to use, with cutoff high work vapour source.

One of ordinary skill in the art will be appreciated that embodiment described here is to aid in reader and understands this reality With new principle, it should be understood that protection domain of the present utility model is not limited to such especially statement and embodiment. One of ordinary skill in the art can these technical inspirations according to disclosed in the utility model make and various do not depart from this practicality New substantive other various specific deformations and combination, these deformations and combination are still in protection domain of the present utility model.

Claims (9)

1. a kind of multi-functional pressure/flow control valve for having good sealing property concurrently, it is characterised in that perform machine including valve, hydraulic pressure Structure (22) and the support frame (19) for connecting valve and hydraulic actuating mechanism (22)；The valve includes valve body (1), is arranged on In valve body (1) and the valve seat (17) and sleeve (6) and valve rod (15) that are sequentially connected；On the sleeve (6) with valve body import and The position of valve seat connection is designed with some sieve apertures；The sleeve (6) coordinates with the valve plug (2) that valve rod (15) end is installed；It is described Valve rod (15) extends valve body (1) and is connected with providing the hydraulic actuating mechanism (22) of driving force；

The hydraulic actuating mechanism (22) includes oil cylinder-piston component and hydraulic control module；Oil cylinder-the piston component is valve Door provides driving force, and its piston rod (2202) is connected with stretching out the valve rod (15) of valve body (1)；The hydraulic control module control oil Oil sources moves towards so that oil cylinder-piston rod assembly motion in pipeline, including quick closing valve magnetic valve (2203), hydraulic control one-way valve (2207), Inserted valve (2204), servo valve (2205), pressure release check valve (2208)；During quick closing valve magnetic valve (2203) dead electricity, one connects Mouth is connected with inserted valve (2204), and another is connected through filter (2209) with in-line, the quick closing valve magnetic valve (2203) When obtaining electric, an interface is connected with inserted valve (2204), and another interface is connected with return line；The inserted valve (2204) point Oil cylinder (2201) and return line in oil cylinder-piston rod assembly are not connected to；When the servo valve (2205) obtains positive electricity, one Interface is connected through normally open solenoid valve (2206) with the oil cylinder (2201) in oil cylinder-piston rod assembly, and another is through filter (2209) it is connected with in-line, when the servo valve (2205) obtains negative electricity, an interface is through normally open solenoid valve (2206) and oil Oil cylinder (2201) connection in cylinder-piston rod assembly, another interface is connected with return line, servo valve (2205) dead electricity When, total interface is off；The hydraulic control one-way valve (2207) and inserted valve (2204) are through pressure release check valve (2208) Connected with security personnel's oil pipe line.

2. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 1, it is characterised in that the valve Seat (17) is venturi valve seat；The valve body (1) offers U-type groove (18) with valve seat (17) junction.

3. multi-functional pressure/the flow control valve according to claim 1 or claim 2 for having good sealing property concurrently, it is characterised in that institute State at the top of support frame (19) and hydraulic actuating mechanism (22) is connected, bottom is connected by bonnet (8) and valve body (1)；Penetrate support The piston rod (2202) that valve rod (15) in frame (19) penetrates support frame (19) with oil cylinder-piston rod assembly is connected；Penetrate support Upper cover of piston rod in frame (19) is connected to spring (21)；The upper end of the spring (21) at the top of support frame with abutting, lower end and peace Bracket on piston rod (2202) is abutted；On the bracket and the displacement transducer (20) being arranged on support frame (19) Slide plate is connected.

4. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 3, it is characterised in that the valve Sealing ring (3), the first back-up ring (4) and elastic second gear are disposed between plug (2) upper end ring-shaped step and sleeve (6) inwall Enclose (5).

5. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 4, it is characterised in that described close Seal (3) is expanded graphite；Second back-up ring (5) is caught in the neck of valve plug (2) upper end design.

6. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 3, it is characterised in that the valve Lid (8) docks the cavity formed with sleeve (6) and sleeve (6) docks in the cavity formed with valve body (1) and is provided with metal Sawtooth pad (7).

7. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 3, it is characterised in that the valve The upper end of lid (8) is fixed with hold-down grid (9)；The hold-down grid (9), bonnet (8) and valve rod (15) formation cavity according to It is secondary to be provided with the first filler (11), lantern sleeve (12), the second filler (13) and packing ring (14).

8. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 7, it is characterised in that described to fill out Gland (10) is provided between material pressing plate (9) and the first filler (11).

9. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 1, it is characterised in that the oil Cylinder (2201) is connected with oil return pipe.