CN207729031U - A kind of water supply control valve - Google Patents

Abstract

The utility model discloses a kind of water supply control valves, it include mainly electrohydraulic actuator, clasp nut, hold-down grid, filler pressing sleeve, filler, lantern ring, Packing seat, valve deck, valve body, airtight and watertight padding, valve seat, sleeve, spool, valve body is located at water supply control valve bottom, valve body internal passage installs valve seat, opening connection spool on valve seat, spool passes through sleeve and valve deck, valve deck is fixed on body top, spool and valve deck are coordinated by packing box seal, spool passes through hold-down grid, hold-down grid is fixed on valve deck, spool top connects clasp nut, electrohydraulic actuator is installed at the top of water supply control valve.The utility model design single seat sealing structure, sealed reliable, leakage rate is small, flow adjustment range is big, big variable working condition and the requirement of complex working condition technological parameter can be met, equipment operation is more stable, safer, quieter, and airtight and watertight padding can be prevented damaged, can avoid damaged filler and flows into feedwater piping and block desuperheat nozzle bore.

Description

A kind of water supply control valve

Technical field

The utility model is related to give water management, and in particular to a kind of water supply control valve.

Background technology

Water supply control valve is to be widely used in the industrial circles such as power station, light textile, petrochemical industry, heat supply, refrigeration, papermaking and coal chemical industry One of the core component of middle reducing-and-cooling plant, directly affects the performance of reducing-and-cooling plant.With China's " cogeneration of heat and power The development of engineering, heat supply steam supply engineering " cause, such as heavy-duty generator group, megaton ethylene project, gas engineering, height The development of the construction and defence and military cause of the great key project of the country such as energy nuclear power engineering, large-scale water surface naval vessels, subtracts desuperheat The demand of pressure device will constantly expand, also higher and higher to its performance requirement.A large amount of along with big flow high parameter boiler unit make With, various big variable working condition conditions occur everywhere, especially in high temperature and pressure, changes in flow rate range is big, desuperheat and decompression amplitude become In the case of changing big, degree of regulation height, the requirement of the energy consumption and performance of product, security performance, service life, noise etc. is got over Come higher.Traditional water supply control valve is single-stage two-seat structure, it is not easy to it seals, leakage rate is big and can only realize that throttling is primary, Regulation performance and safe and reliable aspect in reducing-and-cooling plant often will appear some problems.The development of water supply control valve with open Hair, which solves, requires water supply control valve to have high-performance (adjustable range is big, precision is high, good energy-conserving effect, service life are long), high The problem of reliability (safe and reliable).The structure of traditional water supply control valve is generally single-stage two-seat structure, valve body and valve base chamber Using a group weldering, when bearing High Pressure Difference, it is also easy to produce flash distillation and cavitation, valve seat and valve core sealed cover easy damaged, valve seat can not be replaced, easily Cause leakage phenomenon.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the prior art, and provide a kind of water supply control valve.

The purpose of this utility model is completed by following technical solution：This water supply control valve, main includes electricity Liquid executing agency, clasp nut, hold-down grid, filler pressing sleeve, filler, lantern ring, Packing seat, valve deck, valve body, airtight and watertight padding, Valve seat, sleeve, spool, sleeve first layer, the sleeve second layer, valve body are located at water supply control valve bottom, valve body internal passage installation Valve seat, opening connection spool, spool pass through sleeve and valve deck, valve deck to be fixed on body top on valve seat, and spool and valve deck pass through Packing box seal coordinates, and spool passes through hold-down grid, hold-down grid to be fixed on valve deck, and spool top connects clasp nut, gives Electrohydraulic actuator, water supply control valve generally single seat sealed plunger form of sleeve, valve insertion solderless are installed at the top of water control valve Fitting.

Embedded cooperation is all used between the valve seat, sleeve and valve body, is filled with airtight and watertight padding in fit clearance, can be prevented close Packing material is damaged, and damaged filler is avoided to flow into feedwater piping and block desuperheat nozzle bore.

The sleeve uses double-layer structure, sleeve first layer to coordinate valve body, and the sleeve second layer coordinates spool, to eliminate high pressure The hidden danger of valve is destroyed in the case of difference because of cavitation, and sleeve is designed according to micropole diffusor principle.

The packing box seal uses Packing seat, airtight and watertight padding, filler pressing sleeve and adds lantern ring structure, makes sealing in this way Filler is all close to valve deck and spool all in pressured state, filler uniform force, and airtight and watertight padding, easily reaches the close of ne-leakage Envelope.

It is valve rod and flap integral structure that the spool uses conical surface seal, spool with valve seat, makes valve base sealing and valve The guide part potential energy of core is disposably processed, ensure that sealing surface of seat relative axis verticality and concentricity and sleeve with The concentricity of the guide surface relative axis of flap cooperation.

The beneficial effects of the utility model are：

1, using single seat sealing structure, sealed reliable, leakage rate is small.

2, using twin-stage adjustable sleeve structure, flow adjustment range is big, can meet big variable working condition and complex working condition technique ginseng Several requirements.

3, sleeve uses double-layer structure, to eliminate the hidden danger for destroying valve under high differential pressures because of cavitation.Sleeve according to Micropole diffusor principle designs, and throttling, noise reduction, steady flow result are apparent, keeps equipment operation more stable, safer, quieter.

4, between valve seat, airtight and watertight padding and sleeve using embedded, airtight and watertight padding can be prevented damaged, avoid damaged filler stream Enter feedwater piping and blocks desuperheat nozzle bore.Packing box seal uses Packing seat, airtight and watertight padding, filler pressing sleeve and adds lantern ring Structure makes airtight and watertight padding all in pressured state, filler uniform force in this way, and stuffing-box and valve rod are all close in airtight and watertight padding, easily Reach the sealing of ne-leakage.

Description of the drawings

Fig. 1 is the general structure schematic diagram of the utility model.

Fig. 2 is the valve seat and plug sealing structure schematic diagram of the utility model.

Fig. 3 is the valve seat, airtight and watertight padding and sleeve insert seal structural schematic diagram of the utility model.

Fig. 4 is the packing box seal structural schematic diagram of the utility model.

Fig. 5 is traditional single stage two-seater water supply control valve structural schematic diagram.

Fig. 6 is desuperheat water supply system schematic diagram.

Reference sign：Electrohydraulic actuator 1, clasp nut 2, hold-down grid 3, filler pressing sleeve 4, filler 5, lantern ring 6, Packing seat 7, valve deck 8, valve body 9, airtight and watertight padding 10, valve seat 11, sleeve 12, spool 13, sleeve first layer 14, the sleeve second layer 15, filter 16, cut-off throttle valve 17, water supply control valve 18, check-valves 19, Venturi nozzles 20.

Specific implementation mode

Detailed introduction is done to the utility model below in conjunction with attached drawing：

As shown in the picture, this water supply control valve, mainly include electrohydraulic actuator 1, clasp nut 2, hold-down grid 3, Filler pressing sleeve 4, filler 5, lantern ring 6, Packing seat 7, valve deck 8, valve body 9, airtight and watertight padding 10, valve seat 11, sleeve 12, spool 13, Sleeve first layer 14, the sleeve second layer 15, valve body 9 are located at water supply control valve bottom, and valve seat 11, valve are installed in 9 inner passage of valve body Opening connection spool 13 on seat 11, spool 13 pass through sleeve 12 and valve deck 8, valve deck 8 to be fixed on 9 top of valve body, spool 13 and valve Lid 8 is coordinated by packing box seal, and spool 13 passes through hold-down grid 3, hold-down grid 3 to be fixed on valve deck 8, the connection of spool top Electrohydraulic actuator 1, water supply control valve generally single seat sealed plunger sleeve shaped are installed in clasp nut 2, water supply control valve top Formula, valve insertion solderless fitting.

Embedded cooperation is all used between the valve seat 11, sleeve 12 and valve body 9, and airtight and watertight padding 10 is filled in fit clearance, Airtight and watertight padding 10 can be prevented damaged, damaged filler is avoided to flow into feedwater piping and block desuperheat nozzle bore.

The sleeve 12 uses double-layer structure, sleeve first layer 14 that valve body 9, the sleeve second layer 15 is coordinated to coordinate spool 13, To eliminate the hidden danger for destroying valve under high differential pressures because of cavitation, and sleeve 12 is designed according to micropole diffusor principle, section Stream, noise reduction, steady flow result are apparent, keep equipment operation more stable, safer, quieter.

The packing box seal uses Packing seat 7, airtight and watertight padding 10, filler pressing sleeve 4 and adds 6 structure of lantern ring, in this way Make airtight and watertight padding 10 all in pressured state, filler uniform force, and valve deck 8 and spool 13, Yi Da are all close in airtight and watertight padding 10 To the sealing of ne-leakage.

The spool 13 uses conical surface seal, sealing surface weld deposit cobalt base hard alloy to change 12 trepanning of sleeve with valve seat 11 The control characteristics such as linear and equal percentage may be implemented in orientation valve.Spool 13 is valve rod and flap integral structure, makes valve seat 11 sealings are disposably processed with the guide part potential energy of spool 13, ensure that the verticality and coaxially of 11 sealing surface relative axis of valve seat The concentricity of degree and sleeve 12 and the guide surface relative axis of flap cooperation.

The unlatching of water supply control valve, adjusting or to close be by pressure transmitter and adjuster, then by electrohydraulic actuator 1 It manipulates, band movable valve plug 13 makes spool 13 move up and down in sleeve 12, changes the circulation area of medium to change flow.Water supply Valve epicoele is entered by water inlet pipe, when spool 13 moves up and down, so that water supply is passed through 14 internal channel of first layer sleeve, then passes through again The channel in second layer sleeve 15 is crossed, is run down, into valve seat 11, is flowed into hypocoelom, adjusting it by spool 13 is covering Relative position in cylinder 12, the quantity of aperture, achievees the purpose that second throttle to change flow of media area in control sleeve 12.

It is understood that it will be understood by those skilled in the art that the technical solution of the utility model and utility model structure Think of, which is subject to equivalent substitution or change all, should belong to the protection domain of the utility model the attached claims.

Claims (5)

1. a kind of water supply control valve, it is characterised in that：Include mainly electrohydraulic actuator (1), clasp nut (2), hold-down grid (3), filler pressing sleeve (4), filler (5), lantern ring (6), Packing seat (7), valve deck (8), valve body (9), airtight and watertight padding (10), valve seat (11), sleeve (12), spool (13), sleeve first layer (14), the sleeve second layer (15), valve body (9) are located at water supply control valve bottom Valve seat (11) is installed in portion, valve body (9) inner passage, and opening connects spool (13) on valve seat (11), and spool (13) passes through sleeve (12) it is fixed at the top of valve body (9) with valve deck (8), valve deck (8), spool (13) and valve deck (8) are coordinated by packing box seal, valve Core (13) passes through hold-down grid (3), hold-down grid (3) to be fixed on valve deck (8), and spool top connects clasp nut (2), water supply Installation electrohydraulic actuator (1), water supply control valve generally single seat sealed plunger form of sleeve, valve insertion solderless at the top of control valve Fitting.

2. water supply control valve according to claim 1, it is characterised in that：The valve seat (11), sleeve (12) and valve body (9) Between all use embedded cooperation, be filled with airtight and watertight padding (10) in fit clearance.

3. water supply control valve according to claim 1, it is characterised in that：The sleeve (12) uses double-layer structure, and It is designed according to micropole diffusor principle, sleeve first layer (14) coordinates valve body (9), the sleeve second layer (15) to coordinate spool (13).

4. water supply control valve according to claim 1, it is characterised in that：The packing box seal use Packing seat (7), Airtight and watertight padding (10), filler pressing sleeve (4) and add lantern ring (6) structure, and valve deck (8) and spool are all close in airtight and watertight padding (10) (13)。

5. water supply control valve according to claim 1, it is characterised in that：The spool (13) uses the conical surface with valve seat (11) Sealing, spool (13) are valve rod and flap integral structure.