CN207364309U - A kind of control air source equipment of dome valve - Google Patents

Abstract

A kind of control air source equipment of dome valve, including valve body, spool, valve seat and valve deck, further include gland, one end is connected with the valve deck, the other end extends downwardly the outer end face of spool when conflict to dome valve is closed after the medial surface of the valve deck forms confined planes, forms sealing passage；Seal assembly, including piston and sealing gland, are arranged in the sealing passage, and can be moved in the sealing passage；And air supply channel, extend to the sealing passage from the valve deck perforate and form air inlet and the passage being vented.The beneficial effects of the utility model：There are the performance more relatively reliable than conventional seals and service life using metal material sealing.Controlled by source of the gas, the preferential gas excluded in piston, valve is then turned on after can reducing the pressure between spool and piston, and abrasion when reducing due to Open valve, increases its service life, further reduces maintenance cycle, saves the energy.

Description

A kind of control air source equipment of dome valve

Technical field

The utility model belongs to valve body technical field, more particularly to a kind of control air source equipment of dome valve.

Background technology

Ordinary ball valve sealing is essentially relying under pretightning force or Fluid pressure effect, and valve seat compresses with sphere and makes valve seat material Material produces elastic-plastic deformation and reaches sealing.Since valve body and sphere use metal material, valve seat selects soft non-metallic material Material, when this kind of ball valve is applied in cold and hot state working environment, since the material of valve seat and valve body is different, expands with heat and contract with cold inconsistent, It is easy to cause ball valve in operation and leakage or valve opening and closing failure occurs.Dome valve is most effective in the world, can be opened and closed rapidly Material transfer valve, and the key valve that ash-transmission system usage quantity in coal-burning power plant's is most in the world at present, using effect is optimal Door, in system operation be used for separate and connect electric precipitation ash bucket storehouse pump between blanking, as storehouse pump exhaust valve, for list The conveying discharge door of first storehouse pump, grey storehouse switching dome valve, grey storehouse discharging dome valve etc..Blanking dome valve causes the product in ash bucket Ash dropping into the pump of storehouse at regular time and quantity, the storehouse of each ash bucket pump is equipped with a blanking dome valve.Once there is event in dome valve Barrier, if processing is not in time, dust stratification is defeated not to go out, and the material position in ash bucket is higher and higher, can alarm after crossing level-sensing device, serious Ash bucket can be cracked or electric field is pushed away, in some instances it may even be possible to cause unit outage accident.Existing dome valve utility model patent knot Structure is expanded using airbag aeration to be combined with sphere to realize sealing and block flow of media.Since air sac sealing needs gas swollen Swollen can be only achieved is bonded with sphere, so innate factor determines the material of air bag and the service life does not reach and using industrial and mineral renews effect Fruit (air bag is worn, and soft materials are easily weak in high temperature environments, fracture), even if air bag replaces fluorubber material, due to pipe Medium in road is particulate matter, is so easy to an air bag erosion failure and falls.Since the industrial and mineral of many occasions of power plant is very severe, The service life is very short in use for gasbag-type soft seal dome valve on the market now, in the short cycle will more ventilation bag, so It is all very not convenient to producing and safeguarding.

A kind of dome valve is recorded in the application CN201610229392.8 files submitted before inventor, which lives Clamped seal member is provided between plug and sealing gland, the movement of piston and sealing gland is promoted by air pressure, incite somebody to action the two Between the seal member that clamps and spool it is inconsistent so as to reach sealing, and seal member uses hard pad (such as engineering plastics) Sealing has the performance more relatively reliable than conventional seals and a service life, but this material is compared to metal material, more easy to wear, and Dome valve valve by off-position to open position when, existing dome valve its exhaust and ball valve open be synchronous, so easily sealing surface Draw it is bad, air pressure present in piston cause between seal member and spool exist contradict pressure, can so increase seal member Abrasion, so as to reduce its service life.

Utility model content

The purpose of this part is to summarize some aspects of the embodiment of the utility model and briefly to introduce some preferable Embodiment.It may do a little simplified or be omitted to keep away in this part and the description of the present application summary and utility model title The purpose for exempting to make this part, specification digest and utility model title obscures, and this simplification or omission cannot be used for limitation originally The scope of utility model.

In view of it is above-mentioned or with problem present in existing dome valve, it is proposed that the utility model.

Therefore, the purpose of this utility model is to provide a kind of control air source equipment of soft and hard seal exhaust dome valve, it is logical Soft, hard sealing piston valve seat movement is crossed to contact with spool to realize the purpose of cut-out medium, and it is real by source of the gas control unit The zero-pressure of existing dome valve is opened.

To solve the above problems, scheme is as follows：A kind of control air source equipment of dome valve, including valve body, spool, valve seat and Valve deck, the spool are connected with rotating axis component, and the rotating axis component, which rotates, drives the valve core movement so as to fulfill dome valve It is turned on and off；Gland, one end are connected with the valve deck, after the other end exceeds the medial surface formation confined planes of the valve deck, The outer end face of spool when conflict to dome valve is closed is extended downwardly, forms sealing passage；And extend from the valve deck perforate The air supply channel of air inlet and exhaust passage is formed to the sealing passage, further includes source of the gas control unit, it include support component, Reversal valve, connection component and gas control component；The support component is connected with the rotating axis component, is provided with the commutation Valve, described reversal valve one end are connected with the air supply channel, its other end passes through the connection component and the gas control component phase Connection, and the gas control component controls the switch of the reversal valve.

As a kind of preferred solution of the control air source equipment of dome valve described in the utility model, wherein：The gas control Component further includes gas source interface and control valve, and the channel interface set on described reversal valve one end passes through conduit and piston interface Connection, the piston interface connects the air supply channel, and the other end flows to interface with source of the gas by the connection component and is connected Connect；The gas source interface is arranged at the upper end of the reversal valve, after the control valve and cam are inconsistent, by the source of the gas stream Turned on to interface internal, complete the source of the gas and flow to open and close between interface and the reversal valve.

As a kind of preferred solution of the control air source equipment of dome valve described in the utility model, wherein：The source of the gas Control unit further includes source of the gas generating assembly, and the source output end of the source of the gas generating assembly is inputted with the source of the gas of the reversal valve End is connected.

As a kind of preferred solution of the control air source equipment of dome valve described in the utility model, wherein：Further include close Sealing assembly, including piston and sealing gland, are arranged in the sealing passage, the piston is made of metal material and can Moved in the sealing passage, range of movement is farthest contradicted to the confined planes, is contradicted recently to the outer end face；It is and described The friction coefficient of piston is between 0.18~0.20.

As a kind of preferred solution of the control air source equipment of dome valve described in the utility model, wherein：The piston To be separately set between the sealing gland, the sealing gland is connected by connector with the piston.

As a kind of preferred solution of the control air source equipment of dome valve described in the utility model, wherein：The piston On be provided with concave passage, the sealing gland forms limit space jaggy, and the spacing sky with the concave passage In be provided with seal, the seal protrude from notch part and the outer end face it is inconsistent.

As a kind of preferred solution of the control air source equipment of dome valve described in the utility model, wherein：The valve deck Lower end is provided with limit protrusion, and the seal assembly moves formation sealing between the confined planes and the limit protrusion.

As a kind of preferred solution of the control air source equipment of dome valve described in the utility model, wherein：The shaft Component includes upper shaft and lower rotary shaft, and the upper shaft and the lower rotary shaft are connected by turntable with the spool.

As a kind of preferred solution of the control air source equipment of dome valve described in the utility model, wherein：The valve deck For boss structure, the air supply channel then extends to bottom and the institute of the boss structure from the boss structure lateral opening hole Sealing passage is stated to be connected.

As a kind of preferred solution of the control air source equipment of dome valve described in the utility model, wherein：The piston Lower end protrude certain part and be in contact with the outer end face of the spool, and the end portion of the sealing gland and the valve The outer end face of core mutually contradicts, and the lower end of the piston is additionally provided with open slot close to abutting portion office.

The beneficial effects of the utility model：The utility model provides a kind of source of the gas control dress of hard sealing exhaust dome valve Put, contacted by soft, hard sealing piston valve seat movement with spool to realize the purpose of cut-out medium.Using metal material (built-up welding Stellite) sealing has the performance more relatively reliable than conventional seals and a service life, the number of very big reduction later maintenance, from And reduce cost.Piston porting, and exhaust outlet is uniformly distributed, and efficiently and effectively can be inflated and is vented so that each point in piston Air pressure keeps uniformly, achieving the purpose that dome valve quick acting in gas replenishment process.Controlled by source of the gas, it is preferential to exclude in piston Gas, be then turned on valve after the pressure between spool and piston can be reduced, abrasion when reducing due to Open valve, increase Add its service life, further reduce maintenance cycle, save the energy, at the same by the outer end face of sealing gland and spool it Between be equipped with it is mutual contradict structure, in valve opening and during closing, behaviour that scraper can be carried out to the outer end face of spool Make, so as to ensure good leakproofness.

Brief description of the drawings

It is required in being described below to embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment The attached drawing used is briefly described, it should be apparent that, drawings in the following description are only some implementations of the utility model Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings Obtain other attached drawings.Wherein：

Fig. 1 is dome valve arrangement in a kind of control air source equipment of dome valve described in the utility model one embodiment Schematic diagram；

Fig. 2 is the dome valve partial structurtes in a kind of control air source equipment of dome valve of the utility model one embodiment Enlarged diagram；

Fig. 3 is dome valve section in a kind of control air source equipment of dome valve described in the utility model another embodiment Structure and partial enlargement structural representation；

Fig. 4 seals for dome valve in a kind of control air source equipment of dome valve described in the utility model one embodiment Part structure diagram；

Fig. 5 is the cross-sectional view of air supply channel described in the utility model one embodiment；

Fig. 6 is dome valve section in a kind of control air source equipment of dome valve described in the utility model further embodiment Structure diagram, wherein omitting seal assembly；

Fig. 7 is dome valve seal assembly in a kind of control air source equipment of dome valve described in the utility model one embodiment Cross-sectional view；

Fig. 8 is single for source of the gas control in a kind of control air source equipment of dome valve described in the utility model another embodiment The overall structure diagram of member；

Fig. 9 is the enlarged structure schematic diagram of gas source interface in the utility model another embodiment；

Figure 10 is gas control component in a kind of control air source equipment of dome valve described in the utility model another embodiment Structure diagram；

Figure 11 is in a kind of gas control component of the control air source equipment of dome valve described in the utility model another embodiment Remove the structure diagram of cam；

Figure 12 is channel interface structure in a kind of control air source equipment of dome valve described in the utility model one embodiment Schematic diagram.

Embodiment

To enable the above-mentioned purpose of the utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this The embodiment of utility model is described in detail.

Many details are elaborated in the following description in order to fully understand the utility model, but this practicality is new Type can also be implemented using other different from other manner described here, and those skilled in the art can be without prejudice to this reality With doing similar popularization in the case of new intension, therefore the utility model is from the limitation of following public specific embodiment.

Secondly, " one embodiment " or " embodiment " referred to herein refers to may be included at least one reality of the utility model A particular feature, structure, or characteristic in existing mode." in one embodiment " that different places occur in the present specification is not Same embodiment is referred both to, nor the single or selective embodiment mutually exclusive with other embodiment.

Thirdly, the utility model combination schematic diagram is described in detail, when the utility model embodiment is described in detail, for just In explanation, represent that the profile of device architecture can disobey general proportion and make partial enlargement, and the schematic diagram is example, its The scope of the utility model protection should not be limited herein.In addition, the three-dimensional of length, width and depth should be included in actual fabrication Bulk.

It is new to this practicality below in conjunction with attached drawing to make the purpose of this utility model, technical solution and advantage clearer The embodiment of type is described in further detail.

Embodiment 1：

As shown in Figure 1, Fig. 1 shows dome valve structure diagram in a kind of control air source equipment of dome valve.Dome valve Often apply on the pipeline and tank body that gas-particle two-phase is blown or is conveyed, realize cut-out or closing function.Circle in this embodiment The control air source equipment of overhead-valve, that includes valve body 100, the spool 200 being arranged inside valve body 100, annular valve seat 300, And the valve deck 400 on valve seat 300 is arranged at, wherein, spool 200 is fixedly connected by screw with 500 phase of rotating axis component, shaft Component 500 is turned on and off by rotating to move with movable valve plug 200 so as to fulfill dome valve.In order to preferably realize dome valve Sealing, referring to Fig. 2 and Fig. 3, in this embodiment, which further comprises gland 600, and its one end passes through with valve deck 400 Screw is mutually fixedly connected, and the other end extends downwardly conflict to dome after the medial surface 401 of valve deck 400 forms confined planes 601 Valve close when spool 200 outer end face 201, formed sealing passage M, the sealing passage M eventually for seal assembly 700 for Dome valve blocks sealing during medium.Pointed seal assembly 700 herein, is arranged in sealing passage M, and can seal Movement in passage M, range of movement are farthest contradicted to the confined planes 601 of gland 600, contradicted recently to the outer end face of spool 200 201.Seal assembly 700 includes piston 701 and sealing gland 702, is wherein set between piston 701 and sealing gland 702 for split Put, sealing gland 702 is fixedly connected by connector 703 with 701 phase of piston, and the entirety after the two fixation can be in sealing passage Synchronous piston movement is done in M.Further, the lower end of piston 701 protrudes certain part and connects with the outer end face 201 of spool 200 Touch, and when dome valve is in off-position, the part extended to lower end of sealing gland 702 and the outer end face 201 of spool 200 are mutual Contradict, spool 200 is rotating since the outer end face 201 of spool 200 can rotate during execution is turned on and off During the competing part, due to contacting and occurring opposite movement, can will remain in the outer end face of spool 200 201 material scraper removes, so as to play the role of scraper, ensures that dome valve has preferable leakproofness.

In this embodiment, make piston 701 material it is very special, its use surfacing stellite make and Into, stellite be it is a kind of be resistant to all kinds abrasion and the hard alloy of corrosion and high-temperature oxydation, i.e., it is usually said Cobalt chromium tungsten (molybdenum) alloy or cobalt-base alloys, stellite are using cobalt as main component, contain a considerable amount of nickel, chromium, tungsten With the alloying element such as a small amount of molybdenum, niobium, tantalum, titanium, lanthanum, a kind of alloy yet containing iron, different according to component in alloy occasionally, Welding wire can be made in they, and powder is used for the technique such as hard-face overlaying welding, thermal spraying, surfacing, and forge piece and powder smelting can also be made Golden part, and be then made in the present embodiment of built-up welding, there is the performance of corrosion-and high-temp-resistant, and meet final obtained piston 701 friction coefficient is between 0.18~0.20.It is preferred that the piston 701 with 201 phase-contact surface of outer end face of spool 200 Finish be 0.4 μm~0.8 μm, and the finish for the outer end face 201 of spool 200 for meeting to be in contact with piston 701 is also 0.4 μm~0.8 μm.It so, it is possible preferably to complete sealing, and reduce the inconsistent material abrasion brought, therefore reduce maintenance Number, extend the service life used, the cost-effective and energy.

In the process, spool 200 neither produces any contact with valve body 100.Certainly, in this embodiment, should Air supply channel 800 is additionally provided with dome valve, it is extended to from 400 perforate of valve deck, and sealing passage M forms air inlet and what is be vented leads to Road.It is preferred that as shown in figure 4, when valve deck 400 is boss structure, air supply channel 800 from the lateral opening hole of the boss structure and The bottom for extending to the boss structure afterwards is connected with sealing passage M, and is set to balance inflation, and air supply channel 800 is set For two passages symmetrical above and below.In this way, when external gas source is inflated by air supply channel 800 into the dome valve, shaft Part 500 is rotated by 90 ° with movable valve plug 200 and blocks medium channel, and at this time, seal assembly 700 forces seal assembly due to gas pressure 700 resist to the formation sealing of outer end face 201 of spool 200, completely cut off particle variously-shaped in gap, dome valve completely closes； When dome valve is opened, compressed air (or nitrogen) pressure release in passage M is sealed, stops itself retraction, then spool 200 rotates 90 ° to open position, since spool 200 is not contacted with seal assembly 700, realize the unlatching of dome valve, and it is small to open and close torque, abrasion It is small, so as to improve service life, greatly reduce maintenance cost and time.

Embodiment 2：

As shown in Figure 5 and Figure 6, and referring to Fig. 1~Fig. 4, the control air source equipment of dome valve in this embodiment, its In include valve body 100, the spool 200 being arranged inside valve body 100, annular valve seat 300, and being arranged on valve seat 300 Valve deck 400, wherein, spool 200 is fixedly linked by screw and rotating axis component 500, rotating axis component 500 pass through rotate drive Spool 200 moves to be turned on and off so as to fulfill dome valve.Herein, in order to preferably realize the opening and closing of dome valve, Rotating axis component 500 includes upper shaft 501 and lower rotary shaft 502, and upper shaft 501 and lower rotary shaft 502 pass through rotating arm disk 503 and spool 200 are connected, so as to fulfill the movement with movable valve plug 200.In order to preferably realize the sealing of dome valve, referring to Fig. 2 and Fig. 3, In this embodiment, which further comprises gland 600, and its one end is mutually fixedly connected with valve deck 400 by screw, the other end Beyond valve deck 400 medial surface 401 formed confined planes 601 after, extend downwardly contradict to dome valve closes when spool 200 outside End face 201, forms close when sealing passage M, the sealing passage M block medium eventually for seal assembly 700 for dome valve Envelope.In this embodiment, it is actually also there are position limiting structure at one, i.e.,：The limit protrusion 402 that the lower end of valve deck 400 is set, The limit protrusion 402 can limit the range of movement of seal assembly 700, prevent seal assembly 700 " coming off " so that sealing group Part 700 moves formation sealing between confined planes 601 and limit protrusion 402.Pointed seal assembly 700 herein, is arranged at Seal in passage M, and can be moved in sealing passage M, the confined planes 601 of the farthest conflict of range of movement to gland 600, recently Contradict to the outer end face 201 of spool 200.In order to preferably realize sealing, the leakage of gas after inflation is prevented, in the present embodiment Soft sealing is also provided with, specifically, with being provided with limit space at 702 connecting pin of sealing gland on piston 701, it is piston The concave passage being provided with 701, the sealing gland 702 that concave passage is connected end is spacing, is formed and has spacing sky jaggy Between, and seal S is provided with the limit space, and seal S is spacing in limit space by sealing gland 702, seal It is inconsistent that S protrudes from the part of notch and the outer end face 201 of spool 200 in limit space, outer end face 201 is carried out one it is soft The double containment that soft or hard combination is cooperatively formed between sealing, and the hard sealing of piston 701 is formed, and concave leads in the present embodiment certainly The spacing mode for forming limit space is a kind of preferred between road and sealing gland 702, or other forms, such as piston The limit space of seal S can be accommodated by directly being set on 701, and limit space is not acted on sealing gland 702, can be direct Seal S is limited in tool limit space jaggy, part and outer end face 201 inconsistent sealing of the protrusion with notch；Its Middle seal S is sealing ring made of special soft materials, and contingency snaps into tubular metal object at work when dome valve When hard valve seat damage, valve can still be reached zero leakage, therefore, it is possible between the seal assembly 700 of rigid material Soft or hard combination double containment form is cooperatively formed, improves the sealing performance of dome valve, such as：Material is fluorubber, and fluorubber refers to Synthesis macromolecular elastomer containing fluorine atom on the carbon atom of main chain or side chain；The introducing of fluorine atom, it is excellent to assign rubber Heat resistance, inoxidizability, oil resistivity, corrosion resistance and resistance to weathering, further prevent the leakage of material, and are located at the circle Junction between the valve body 100 of overhead-valve, valve seat 300, valve deck 400 and gland 600 is both provided with rubber ring, strengthening part connection Between sealing performance, so as to improve the leakproofness of dome valve.It is preferred that piston 701 is made of metal alloy, during sealing Formation sealing is contacted with the outer end face 201 of spool 200, such sealing effect is more preferable.Seal assembly 700 includes piston 701 and close Sealed cover 702.It is preferred that piston 701 is to be separately set with sealing gland 702, sealing gland 702 is by connector 703 with living 701 phases are filled in be fixedly connected.And sealing gland 702 is not contacted with the outer end face 201 of spool 200, and when dome valve is in off-position When, the part extended to lower end of sealing gland 702 and the outer end face 201 of spool 200 mutually contradict, and spool 200 is opened in execution During opening or closing, since the outer end face 201 of spool 200 can rotate, it is rotating during the competing portion Point, due to contacting and occurring opposite movement, the material scraper for the outer end face 201 for remaining in spool 200 can be removed, so as to play The effect of scraper, ensures that dome valve has preferable leakproofness.Preferably, piston 701 is connected with sealing gland 702 by eight Part 703 is connected, and connector 703 is bolt herein, and eight bolts are distributed on the side of sealing gland 702, surround circumference, Achieve the purpose that fastening.

In this embodiment, make piston 701 material it is very special, its use surfacing stellite make and Into, stellite be it is a kind of be resistant to all kinds abrasion and the hard alloy of corrosion and high-temperature oxydation, i.e., it is usually said Cobalt chromium tungsten (molybdenum) alloy or cobalt-base alloys, stellite are using cobalt as main component, contain a considerable amount of nickel, chromium, tungsten With the alloying element such as a small amount of molybdenum, niobium, tantalum, titanium, lanthanum, a kind of alloy yet containing iron, different according to component in alloy occasionally, Welding wire can be made in they, and powder is used for the technique such as hard-face overlaying welding, thermal spraying, surfacing, and forge piece and powder smelting can also be made Golden part, and be then made in the present embodiment of built-up welding, there is the performance of corrosion-and high-temp-resistant, and meet final obtained piston 701 friction coefficient is between 0.18~0.20.It is preferred that the piston 701 with 201 phase-contact surface of outer end face of spool 200 Finish be 0.4 μm~0.8 μm, and the finish for the outer end face 201 of spool 200 for meeting to be in contact with piston 701 is also 0.4 μm~0.8 μm.It so, it is possible preferably to complete sealing, and reduce the inconsistent material abrasion brought, therefore reduce maintenance Number, extend the service life used, the cost-effective and energy.

In the process, spool 200 neither produces any contact with valve body 100.Certainly, in this embodiment, should Dome valve is additionally provided with air supply channel 800, it extends to sealing passage M from 400 perforate of valve deck and forms air inlet and the passage being vented. It is preferred that as shown in figure 4, when valve deck 400 is boss structure, air supply channel 800 from the lateral opening hole of the boss structure then The bottom for extending to the boss structure is connected with sealing passage M, and is set to balance inflation, and air supply channel 800 is arranged to Two passages symmetrical above and below.In this way, when external gas source is inflated by air supply channel 800 into the dome valve, rotating axis component 500 band movable valve plugs 200, which are rotated by 90 °, blocks medium channel, and at this time, seal assembly 700 forces seal assembly due to gas pressure 700 resist to the formation sealing of outer end face 201 of spool 200, completely cut off particle variously-shaped in gap, dome valve completely closes； When dome valve is opened, compressed air (or nitrogen) pressure release in passage M is sealed, stops itself retraction, then spool 200 rotates 90 ° to open position, since spool 200 is not contacted with seal assembly 700, realize the unlatching of dome valve, and it is small to open and close torque, abrasion It is small, so as to improve service life, greatly reduce maintenance cost and time.

As described above, it is not difficult to find that dome valve is in material transportation process in description more than to dome valve working status It is not directly contacted between spool 200 and valve body 100 when middle valve opening or closing, efficiently solves mutual hard rub Wipe, extend the service life of spool 200, and due to being used for sealing using the seal assembly 700 of hardness, strengthening dome valve Also the service life of dome valve is integrally extended while during leakproofness, greatly meets production technology needs, ensure that the person And equipment safety.

Embodiment 3：

As shown in Figure 5 and Figure 6, and referring to Fig. 1~Fig. 4, the control air source equipment of dome valve in this embodiment, its In include valve body 100, the spool 200 being arranged inside valve body 100, annular valve seat 300, and being arranged on valve seat 300 Valve deck 400, wherein, spool 200 is fixedly linked by screw and rotating axis component 500, rotating axis component 500 pass through rotate drive Spool 200 moves to be turned on and off so as to fulfill dome valve.Herein, in order to preferably realize the opening and closing of dome valve, Rotating axis component 500 includes upper shaft 501 and lower rotary shaft 502, and upper shaft 501 and lower rotary shaft 502 pass through rotating arm disk 503 and spool 200 are connected, so as to fulfill the movement with movable valve plug 200.In order to preferably realize the sealing of dome valve, referring to Fig. 2 and Fig. 3, In this embodiment, which further comprises gland 600, and its one end is mutually fixedly connected with valve deck 400 by screw, the other end Beyond valve deck 400 medial surface 401 formed confined planes 601 after, extend downwardly contradict to dome valve closes when spool 200 outside End face 201, forms close when sealing passage M, the sealing passage M block medium eventually for seal assembly 700 for dome valve Envelope.In this embodiment, it is actually also there are position limiting structure at one, i.e.,：The limit protrusion 402 that the lower end of valve deck 400 is set, The limit protrusion 402 can limit the range of movement of seal assembly 700, prevent seal assembly 700 " coming off " so that sealing group Part 700 moves formation sealing between confined planes 601 and limit protrusion 402.Pointed seal assembly 700 herein, is arranged at Seal in passage M, and can be moved in sealing passage M, the confined planes 601 of the farthest conflict of range of movement to gland 600, recently Contradict to the outer end face 201 of spool 200.In order to preferably realize sealing, the leakage of gas after inflation, seal assembly 700 are prevented Seal S is provided between the medial surface 401 of valve deck 400 and the ring side 602 of gland 600, it is special soft material Sealing ring made of matter, and when dome valve at work just in case when snapping into tubular metal object can hard valve seat damage, valve according to Zero leakage can so be reached, therefore, it is possible to cooperatively form soft or hard combination double containment shape between the seal assembly 700 of rigid material Formula, improves the sealing performance of dome valve, such as：Material is fluorubber, and fluorubber refers to contain on the carbon atom of main chain or side chain The synthesis macromolecular elastomer of fluorine atom；The introducing of fluorine atom, assigns the excellent heat resistance of rubber, inoxidizability, oil resistivity, resistance to Corrosivity and resistance to weathering, further prevent the leakage of material.It is preferred that piston 701 is made of metal alloy, seal When formation sealing is contacted with the outer end face 201 of spool 200, such sealing effect is more preferable.Seal assembly 700 includes piston 701 With sealing gland 702.It is preferred that piston 701 is to be separately set with sealing gland 702, sealing gland 702 passes through connector 703 It is fixedly connected with 701 phase of piston.And when dome valve is in off-position, the part extended to lower end of sealing gland 702 and spool 200 outer end face 201 mutually contradicts, and spool 200 is during execution is turned on and off, due to the outer end face 201 of spool 200 Can rotate, it is rotating during the competing part, due to contacting and occurring opposite movement, will can remain in The material scraper of the outer end face 201 of spool 200 removes, so as to play the role of scraper, ensures that dome valve has preferable leakproofness, together When the present embodiment in, with reference to shown in Fig. 3, the lower end of piston 701 protrudes certain part and connects with the outer end face 201 of spool 200 Touch, and the end portion of sealing gland 702 and the outer end face 201 of spool 200 mutually contradict, and the lower end of piston 701 close is supported Contact portion office is additionally provided with open slot 701a, and the setting of open slot 701a can be during scraper as caching material Effect, prevent ball valve occur in operation process suddenly bounce, so as to cause certain damage to ball valve, reduce what it was used In the service life, increase the maintenance cost of product.Preferably, piston 701 is connected with sealing gland 702 by eight connectors 703, eight A connector 703 is distributed on the side of sealing gland 702, is surrounded circumference, is achieveed the purpose that fastening.

In this embodiment, make piston 701 material it is very special, its use surfacing stellite make and Into, stellite be it is a kind of be resistant to all kinds abrasion and the hard alloy of corrosion and high-temperature oxydation, i.e., it is usually said Cobalt chromium tungsten (molybdenum) alloy or cobalt-base alloys, stellite are using cobalt as main component, contain a considerable amount of nickel, chromium, tungsten With the alloying element such as a small amount of molybdenum, niobium, tantalum, titanium, lanthanum, a kind of alloy yet containing iron, different according to component in alloy occasionally, Welding wire can be made in they, and powder is used for the technique such as hard-face overlaying welding, thermal spraying, surfacing, and forge piece and powder smelting can also be made Golden part, and be then made in the present embodiment of built-up welding, there is the performance of corrosion-and high-temp-resistant, and meet final obtained piston 701 friction coefficient is between 0.18~0.20.It is preferred that the piston 701 with 201 phase-contact surface of outer end face of spool 200 Finish be 0.4 μm~0.8 μm, and the finish for the outer end face 201 of spool 200 for meeting to be in contact with piston 701 is also 0.4 μm~0.8 μm.It so, it is possible preferably to complete sealing, and reduce the inconsistent material abrasion brought, therefore reduce maintenance Number, extend the service life used, the cost-effective and energy.

In the process, spool 200 neither produces any contact with valve body 100.Certainly, in this embodiment, should Dome valve is additionally provided with air supply channel 800, it is extended to from 400 perforate of valve deck, and sealing passage M forms air inlet and what is be vented leads to Road.It is preferred that as shown in figure 4, when valve deck 400 is boss structure, air supply channel 800 from the lateral opening hole of the boss structure and The bottom for extending to the boss structure afterwards is connected with sealing passage M, and is set to balance inflation, and air supply channel 800 is set For two passages symmetrical above and below.In this way, when external gas source is inflated by air supply channel 800 into the dome valve, shaft Part 500 is rotated by 90 ° with movable valve plug 200 and blocks medium channel, and at this time, seal assembly 700 forces seal assembly due to gas pressure 700 resist to the formation sealing of outer end face 201 of spool 200, completely cut off particle variously-shaped in gap, dome valve completely closes； When dome valve is opened, compressed air (or nitrogen) pressure release in passage M is sealed, stops itself retraction, then spool 200 rotates 90 ° to open position, since spool 200 is not contacted with seal assembly 700, realize the unlatching of dome valve, and it is small to open and close torque, abrasion It is small, so as to improve service life, greatly reduce maintenance cost and time.

In the present embodiment, in order to solve the problems, such as that the unlatching of spool 200 is synchronous with piston exhaust process, when valve needs to beat When opening, its exhaust of existing dome valve and the opening of spool 200 are synchronous, due to air pressure present in piston, are so held Easily sealing surface is drawn bad.Therefore source of the gas control unit 900 is further included in the present embodiment, can be real before the opening of spool 200 Preferentially it is vented in existing piston 701, so that pressure is not present in piston 701, i.e., is not present between piston 701 and spool 200 Extruding, is then turned on spool 200 after the completion of pressure release, therebetween there will be no abrasion, reduces spool 200 due to the damage of unlatching Consumption, increases the service life of dome valve.Specifically,

With reference to shown in Fig. 7~10, which further includes source of the gas control unit 900, it includes support component 901, commutation Valve 902, connection component 903, gas control component 904 and source of the gas generating assembly 905, specifically, being provided with 100 end-rack of valve body Support component 901, source of the gas control unit 900 are fixedly connected by the bolt of support component 901 with 100 phase of valve body, support component Source of the gas generating assembly 905 is fixed with 901, source of the gas generating assembly 905 can produce different sources of the gas, will herein in the present embodiment Air pump or air compressor in support component 901 are preferably arranged at, such as air pump is " air pump ", from an enclosure space Exclude air or a kind of device from enclosure space addition air；Air pump is broadly divided into electric air pump, hand air pump and foot-propelled gas Pump；Air pump of the electric air pump using electric power as power, does not stop compressed air by electric power, produces air pressure；Its operation principle is：Start Machine drives air pump bent axle by two V-belts, so as to drive piston to be inflated, the gas got is imported by gas-guide tube and stored up Gas in gas receiver is imported the pressure regulator valve being fixed on air pump further through a gas-guide tube by inflator, another aspect gas receiver It is interior, so that the air pressure in gas receiver is controlled, when the air pressure in gas receiver is not up to the pressure of pressure regulator valve setting, out of gas receiver Gas into pressure regulator valve cannot open-top pressure regulator valve valve；When the air pressure in gas receiver reaches the pressure of pressure regulator valve setting, from Enter the open-top pressure regulator valve valve of gas of pressure regulator valve in gas receiver, into air pump in the air flue that is communicated with pressure regulator valve, and pass through gas The air inlet of road control air pump is normally opened, so that air pump running no load, reaches reduction kinetic equation loss, protects the purpose of air pump； When the air pressure in gas receiver is less than because of loss the pressure of pressure regulator valve setting, valve in pressure regulator valve is by return spring by its time Position, disconnects the control gas circuit of air pump, and air pump starts to inflate again, so circulation, just can produce the source of the gas of different air pressures, so that Supply reversal valve 902 uses；And reversal valve 902 is fixed in support component 901, one end is connected with piston 701, the other end and gas Control component 904 connects, and further, i.e., the channel interface 902a set on 902 one end of reversal valve is connected by conduit and piston interface R Connecing, piston interface R connects the air supply channel 800, its other end is connected by connecting component 903 with gas control component 904, And gas control component 904 controls the switch of reversal valve 902.Reversal valve 902 in the present embodiment is gas pressure change valve, in direction controlling Action direction of the air-flow in valve is pressed in valve, one-way type control valve and reversing control valve, such as pressure control commutation can be divided into Valve be using gas pressure come make main valve plug move and flow to gas and changing, by control mode difference be divided into pressurized control, Release control and differential pressure control three kinds；Pressurized control refers to that added control signal pressure is gradually increasing, when air pressure increase To spool operating pressure when, main valve just commutates；Release control refers to that added gas control signal pressure is to reduce, when being reduced to During a certain pressure value, main valve commutation；Differential pressure control is main valve plug is commutated under the action of pressure at two ends difference, and Pneumatic reversal valve It is different by main valve structure, and two kinds of principal modes of cut-off type and side valve type can be divided into, it can be divided into pressure control, electricity by control mode Two Mechanical course of magnetic control, manpower control and time control；By the switching position of valve and the number of line portals can be divided into several it is several Port valve；Gas pressure change valve in the present embodiment is entered by different sources of the gas so as to change the movement of 902 main valve plug of reversal valve, is changed Become the flow direction of wherein gas, realize preferential discharge of the source of the gas in reversal valve 902.And the connection on the other end of reversal valve 902 Component 903 is connected with gas control component 904, connection component 903 described herein as a preferred embodiment, its for hard tube or hose with Corresponding coupling coordinates the connectivity structure being connected, and achievees the purpose that to connect gas, the output terminal of reversal valve 902 passes through air guide Pipe connects piston interface R air inlets into piston 701, and piston interface R is connected with the vertical gas port A in air supply channel 800, will Source of the gas is afterwards inflated piston 701 by vertical gas port A guiding horizontals gas port B, and the process being vented is then to first pass through water Flat gas port B, discharges gas after being oriented to vertical gas port A afterwards.

Further, gas control component 904 further includes gas source interface 904a, control valve 904b, source of the gas flow direction in the present embodiment Interface 904c and cam 904d, specifically, gas source interface 904a is the interface for providing source of the gas, the gas produced by compressed air Pressure, is provided by air compressor or air pump, using compressed air, realizes the source of the gas of different pressures size；Gas in the present embodiment Source interface 904a further includes the gas source interface under two states：Open gas source interface 904a-1 and close gas source interface 904a-2, respectively Source of the gas under being corresponded to for 200 on and off two states of spool, is inputted in reversal valve by the source of the gas under different conditions, changes main valve The operation of core, realizes the reversing switch in reversal valve 902, achievees the purpose that gas commutates.And gas source interface 904a passes through connector Interface 904c is flowed to source of the gas with hose to be connected, source of the gas by and gas source interface 904a flowed into source of the gas in interface 904c, and gas Source stream includes first interface 904c-1 and second interface 904c-2, wherein first interface 904c-1 and gas source interface to interface 904c 904a is connected by angle coupling, and inlet ends of the another second interface 904c-2 then with reversal valve 902 is connected, and between two interfaces It is synchronous between control valve 904b and spool 200 in order to realize by the control intercommunication of control valve 904b, connect with spool 200 Cam 904d corresponding with control valve 904b is provided with the shaft connect, in this way, when spool 200 rotates, cam 904d with Synchronous rotary occurs to correspondence position in it, and, trigger switch inconsistent with control valve 904b, connects source of the gas and flow to interface at this time Two interfaces on 904c, gas flows to interface 904c by source of the gas and enters in reversal valve 902, and the exhaust end of reversal valve 902 leads to Cross piston interface R to be connected with piston 701, then to being inflated sealing in piston 701, this is the process of 701 air inlet of piston.And work as When spool 200 needs to open, in order to solve the problems, such as that spool 200 is synchronous with 701 exhaust process of piston, control letter is provided at this time Number, by switching source of the gas, source of the gas enters in reversal valve 902, and the main valve plug of reversal valve 902 is opened, the gas in piston 701 It will be achieveed the purpose that pressure release by being preferentially discharged in reversal valve 902, opened spool 200 again after pressure release, at this time spool 200 Air pressure just is not present between piston 701, namely there is no extruding force, therefore abrasion therebetween can be reduced, and piston 701 Also metal alloy is made, and more improves service life, reduces maintenance times, saves the energy.Pressurization in the present embodiment Process is：After air pump or air compressor produce the source of the gas of different air pressures first, the pass gas source interface 904a-2 of source of the gas entrance In, and gas source interface 904a connection sources of the gas flow to interface 904c, that is, close gas source interface 904a-2 and pass through conduit and connector and the After one interface 904c-1 is connected, therefore source of the gas enters in first interface 904c-1, control valve is contradicted by cam 904d 904b, will turn on, source of the gas enters reversal valve by second interface 904c-2 between first interface 904c-1 and second interface 904c-2 902 inlet end, its output terminal is connected by conduit with piston interface R, into air supply channel 800, promotes the fortune of piston 701 It is dynamic, dome valve is sealed；And the process of pressure release is, control signal provides pressure release signal, and another source of the gas entrance is opened source of the gas and connect Enter after in mouth 904a-1 in reversal valve 902, thus the main valve plug operation of reversal valve 902, the valve of unlatching reversal valve 902, i.e., When the valve of dome valve needs to open, source of the gas is entered in reversal valve at the same time, and the source of the gas can reach scavenging air valve 902 and open Condition pressure, therefore reversal valve 902 is opened therewith, and the source of the gas inside piston is realized since pressure acts on reversal valve emptying No pressure between piston 701 and ball valve core, it is achieved that zero air pressure opened between spool 200 and piston 701, reduces mill Damage.

Certainly in the present embodiment, pressure gauge is also provided with reversal valve 902 and is capable of the pipe of control valve switching speed Road, and valve feedback signal device is provided with control valve 904b ends, pressure gauge by sensing element in table (Bourdon tube, Bellows, bellows) elastic deformation, then pressure deformation is conducted to pointer by the switching mechanism of movement in table, causes pointer to turn Move to show pressure, while increase the speed of pipe control change-over valve switch, the pressure ginseng of reversal valve 902 can not only be fed back Number, is preferably monitored process, moreover it is possible to the device in valve is protected, there is provided security.And valve feedback signal device, It is then that the switch degree of valve is fed back, by comparison operation, automatically determines the aperture optimum position of valve, reach in work Optimum state.

The above, is only the preferable embodiment of the utility model, but the scope of protection of the utility model is not This is confined to, any one skilled in the art is in the technical scope that the utility model discloses, according to this practicality New technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model Within enclosing.

Claims (10)

1. a kind of control air source equipment of dome valve, including valve body (100), spool (200), valve seat (300) and valve deck (400), The spool (200) is connected with rotating axis component (500), the rotating axis component (500) rotate drive spool (200) movement from And realize being turned on and off for dome valve；Gland (600), one end are connected with the valve deck (400), and the other end exceeds the valve Cover (400) medial surface (401) form confined planes (601) after, extend downwardly contradict to dome valve close when spool (200) Outer end face (201), forms sealing passage (M)；And extend to sealing passage (M) formation from the valve deck (400) perforate The air supply channel of air inlet and exhaust passage (800), it is characterised in that：Source of the gas control unit (900) is further included, it includes support group Part (901), reversal valve (902), connection component (903) and gas control component (904)；

The support component (901) is connected with the rotating axis component (500), is provided with the reversal valve (902), described to change Connected to valve (902) one end with the air supply channel (800), its other end passes through the connection component (903) and the gas control Component (904) is connected, and the gas control component (904) controls the switch of the reversal valve (902).

2. the control air source equipment of dome valve as claimed in claim 1, it is characterised in that：The gas control component (904) is also wrapped Gas source interface (904a) and control valve (904b) are included,

The channel interface (902a) set on described reversal valve (902) one end is connected by conduit with piston interface (R), the work Fill in interface (R) and connect the air supply channel (800), and the other end flows to interface by the connection component (903) with source of the gas (904c) is connected；The gas source interface (904a) is arranged at the upper end of the reversal valve (902), the control valve (904b) With cam (904d) it is inconsistent after, the source of the gas is flowed into conducting inside interface (904c), the source of the gas is completed and flows to interface Open and close between (904c) and the reversal valve (902).

3. the control air source equipment of dome valve as claimed in claim 1 or 2, it is characterised in that：The source of the gas control unit (900) source of the gas generating assembly (905), source output end and the reversal valve of the source of the gas generating assembly (905) are further included (902) air source input end is connected.

4. the control air source equipment of dome valve as claimed in claim 3, it is characterised in that：Seal assembly (700) is further included, is wrapped Piston (701) and sealing gland (702) are included, is arranged in the sealing passage (M), the piston (701) uses metal material It is made and can be moved in the sealing passage (M), range of movement is farthest contradicted to the confined planes (601), is contradicted recently To the outer end face (201)；And the friction coefficient of the piston (701) is between 0.18~0.20.

5. the control air source equipment of dome valve as claimed in claim 4, it is characterised in that：The piston (701) with it is described close To be separately set between sealed cover (702), the sealing gland (702) is connected by connector (703) with the piston (701) Connect.

6. the control air source equipment of dome valve as described in claim 4 or 5, it is characterised in that：Set on the piston (701) There is concave passage, the sealing gland (702) forms limit space jaggy, and the limit space with the concave passage Inside be provided with seal (S), the seal (S) protrude from notch part and the outer end face (201) it is inconsistent.

7. the control air source equipment of dome valve as claimed in claim 6, it is characterised in that：Valve deck (400) lower end is set There is limit protrusion (402), the seal assembly (700) is moved between the confined planes (601) and the limit protrusion (402) Form sealing.

8. the control air source equipment of dome valve as claimed in claim 7, it is characterised in that：The rotating axis component (500) includes Upper shaft (501) and lower rotary shaft (502), the upper shaft (501) and the lower rotary shaft (502) by turntable (503) with it is described Spool (200) is connected.

9. the control air source equipment of dome valve as claimed in claim 7 or 8, it is characterised in that：The valve deck (400) is boss Structure, the air supply channel (800) then extend to bottom and the institute of the boss structure from the boss structure lateral opening hole Sealing passage (M) is stated to be connected.

10. the control air source equipment of dome valve as claimed in claim 9, it is characterised in that：The lower end of the piston (701) is convex Go out certain part to be in contact with the outer end face (201) of the spool (200), and the end portion of the sealing gland (702) Mutually contradicted with the outer end face (201) of the spool (200), and the lower end of the piston (701) is also set close to abutting portion office It is equipped with open slot (701a).