CN103821950A

CN103821950A - Pulse valve

Info

Publication number: CN103821950A
Application number: CN201410073386.9A
Authority: CN
Inventors: 高麟; 汪涛; 方波
Original assignee: Intermet Technology Chengdu Co Ltd
Current assignee: Intermet Technology Chengdu Co Ltd
Priority date: 2014-02-28
Filing date: 2014-02-28
Publication date: 2014-05-28

Abstract

The invention discloses a pulse valve with improved use performance under high-temperature gas. The pulse valve comprises a valve body composed of a valve body and a valve cover, wherein a first closing device is arranged between the valve body and the valve cover; the first closing device is provided with a first closing member capable of reciprocating; the valve body is internally provided with a valve port which can be sealed by the first closing member positioned in a forward shift position; a front gas cavity is formed between the first closing device and the valve body; a rear gas cavity is formed between the first closing device and the valve cover; the first closing device comprises a guide sleeve fixed between the valve body and the valve cover and a piston valve core which is matched with an inner hole of the guide sleeve and serves as the first closing member; the piston valve core is made of a refractory metal and is of a hollow structure provided with a bottom plate and side walls; the inner cavity of the piston valve core is communicated with the rear gas cavity; the bottom plate is in seal fit with the valve port; the side walls are matched with the inner hole and the axle hole of the guide sleeve; a spring used for keeping the piston valve core moving toward the valve port is arranged between the inner side of the bottom plate and the valve cover.

Description

Sentinel valve

Technical field

The present invention relates to sentinel valve, relate in particular to a kind of deashing sentinel valve that high temperature filtration deduster is used that is suitable for.

Background technique

The filter collector (for example sack cleaner, sintered porous membrane filtration deduster) of industrial use is generally all provided with back-blowing dust removing device, when filtration, working as the amount of dust of adhering on filter core acquires a certain degree, just need to start back-blowing dust removing device filter core is carried out to pulse backblowing deashing, dust on filter core is departed from, thereby reach the reusable object of filter core.Sentinel valve is the key components in back-blowing dust removing device, is to control the terminal equipment that blowback air starts and closes.

The filter collector deashing sentinel valve that claimant adopts at present, it comprises the valve body being made up of valve body and valve gap, reciprocating the first dynamic diaphragm is housed between valve body and valve gap, in valve body, being provided with can be by the valve port in locational the first dynamic diaphragm sealing that moves forward, this first dynamic diaphragm kept by spring between the first dynamic diaphragm and valve gap and and valve body between form before air cavity, air cavity after forming between the first dynamic diaphragm and valve gap, between described front air cavity and rear air cavity, be communicated with via the gas port being arranged in valve body, the second dynamic diaphragm that can move forward and backward is equipped with at the top of valve gap, the below that is positioned at this second dynamic diaphragm in valve gap is provided with can be by suction chamber and the exhaust chamber in locational the second dynamic diaphragm blocking-up that moves forward, described suction chamber and rear air cavity conducting, the exhaust port conducting of exhaust chamber and valve gap sidepiece, the top of valve gap is provided with an end cap, the second dynamic diaphragm is arranged between this end cap and valve gap and by the spring between the second dynamic diaphragm and end cap and is kept, the bottom of end cap is provided with the return chamber suitable with the second dynamic diaphragm, when the second dynamic diaphragm is when moving after return chamber, suction chamber and exhaust chamber conducting, this return chamber is by being positioned at end cap, in valve gap and be communicated with pilot hole and described rear air cavity conducting, the upper end of end cap is provided with one for controlling the solenoid valve of return chamber exhaust, after solenoid valve starts, gas in return chamber is discharged the exhaust passage from end cap.The working procedure of above-mentioned sentinel valve is: the purge gas that comes from the suction port of valve body enters rear air cavity and suction chamber by gas port, and enter return chamber by pilot hole, meanwhile, purge gas enters front air cavity, at this moment, no matter the first dynamic diaphragm or the second dynamic diaphragm, due to their both sides air pressure balance, therefore all under the effect of spring separately, be set up in anterior displacement, at this moment, the first dynamic diaphragm sealing valve port, the second dynamic diaphragm blocking-up suction chamber and exhaust chamber; In the time will carrying out blowback, start solenoid valve, discharge the exhaust passage of the gas in return chamber from end cap, return chamber instantaneous loss of pressure, the second dynamic diaphragm overcomes spring pressure and moves after return chamber, makes suction chamber and exhaust chamber conducting, at this moment, gas in rear air cavity is discharged from exhaust port rapidly, cause rear air cavity decompression, the first dynamic diaphragm overcome spring pressure backward air cavity move, the first dynamic diaphragm is separated with valve port, purge gas sprays from valve port, finally acts on filter core.

In actual moving process, inventor finds, in some occasion (for example, in the time that high-temperature gas is carried out to dust removal by filtration, for fear of filter core dewfall) need to use high-temperature gas to carry out blowback, at this moment, above-mentioned sentinel valve easily produces the problem that component are fragile and service time, long rear the first dynamic diaphragm significantly declined to sealing valve port of its end cap part.After careful analysis, find: the first, in the time using high-temperature gas to carry out blowback, high-temperature gas will enter return chamber by pilot hole, thereby cause the component temperature of end cap part higher, thereby cause the component rapid wear problem of end cap part; Working life under the second, the first dynamic diaphragm high temperature is short, thereby causes the sealing problem to valve port.

Need to particularly point out, in the formerly Chinese patent application file that claimant of the present invention has been 2013105287910 at application number, provide a kind of sentinel valve, wherein specially the currently used filter collector deashing of the claimant sentinel valve of this background technique part introduction is carried out to detailed description by reference to the accompanying drawings, therefore can be with reference to this earlier application to more clearly understand technical background of the present invention.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of sentinel valve that improves usability under high-temperature gas.

Sentinel valve of the present invention comprises the valve body being made up of valve body and valve gap, between valve body and valve gap, be provided with the first shutoff device, the first shutoff device has reciprocating the first closure member, in valve body, being provided with can be by the valve port sealing in locational the first closure member that moves forward, air cavity before forming between the first shutoff device and valve body, air cavity after forming between the first shutoff device and valve gap, between front air cavity and rear air cavity, be communicated with via the gas port being arranged in this sentinel valve, the top of described valve gap is provided with the second shutoff device, the second shutoff device has the second reciprocally mobile closure member, the below that is positioned at the second closure member in valve gap is provided with can be by suction chamber and the exhaust chamber in locational the second closure member blocking-up that moves forward, described suction chamber and rear air cavity conducting, the exhaust port conducting of exhaust chamber and valve gap sidepiece, wherein, described the first shutoff device comprises the guide sleeve being mounted between valve body and valve gap and matches using the piston valve core as described the first closure member with the endoporus of this guide sleeve, this piston valve core is a hollow structure of being made and had base plate and sidewall by refractory metal, the inner chamber of piston valve core communicates with rear air cavity, described base plate coordinates with valve port sealing, sidewall and guide sleeve endoporus shaft hole matching, between base plate inner side and valve gap, be provided with for keeping the spring of piston valve core to valve port motion.

The first shutoff device in above-mentioned sentinel valve has adopted brand-new structural design, has used the piston valve core being arranged in guide sleeve to replace original the first dynamic diaphragm.Described piston valve core is a hollow structure of being made and had base plate and sidewall by refractory metal, its inner chamber communicates with rear air cavity, base plate coordinates with sealing valve port, sidewall and guide sleeve endoporus Spielpassung, installed between base plate inner side and valve gap for keeping the spring of piston valve core to valve port motion.Piston valve core can be similar to as the term suggests be one the part that piston equally moves reciprocatingly in guide sleeve, thereby its moving direction can be kept accurately by guide sleeve, wherein, owing to being Spielpassung between the sidewall of piston valve core and guide sleeve endoporus, therefore between the sidewall of piston valve core and guide sleeve, substantially can not affect because of long-term relative movement wearing and tearing the working life of sentinel valve.Because piston valve core is made up of refractory metal, thereby its resistance to high temperature also can obtain fine assurance.In addition, piston valve core for have base plate (valve port is sealed) and sidewall (for guide sleeve endoporus Spielpassung) hollow structure, its inner chamber communicates with rear air cavity, therefore piston valve core weight is light and handy, and can changes and be moved according to the pressure of rear air cavity fast.In a word, the first shutoff device adopting in sentinel valve of the present invention has outstanding resistance to high temperature, higher structural strength and stability in use, thereby can significantly improve the working life of sentinel valve.

The structure that in the above-mentioned sentinel valve of the present invention, valve gap top is relevant to the control of the first shutoff device can be consistent with the structure of the sentinel valve of current use.And as the further improvement to the above-mentioned sentinel valve of the present invention, can be by structural design relevant to the control of the first shutoff device valve gap top: the top of valve gap is provided with a gas circuit and valve body gland independent of each other, described the second closure member is arranged between this gland and valve gap and by the spring between the second closure member and gland and is kept, the bottom of gland is provided with the return chamber suitable with the second closure member, in the time that the second closure member moves to return chamber, suction chamber and exhaust chamber conducting; And gland is provided with the ventilating hole with the conducting of return chamber, described ventilating hole is connected with an electromagnetism-gas-driving valve, thereby is inputted or from this ventilating hole, discharge and control the control gas that the second closure member moves forward and backward in ventilating hole by this electromagnetism-gas-driving valve.Conventionally such improvement, because the gas circuit of gland and the gas circuit of valve body are independent of each other, no matter be the control gas that moves forward to block suction chamber and exhaust chamber to return chamber input control the second closure member, or the control gas in return chamber is discharged so that move after the second closure member, all realize by the electromagnetism-gas-driving valve being connected with ventilating hole, the control gas that debouches return chamber can adopt the gas that temperature is lower (for example normal temperature nitrogen), for example, and high-temperature gas (high temperature blowback air) can not enter in return chamber, like this, just can effectively protect the component of gland part, reduce the seal point of gland part simultaneously, further improve thus the applied at elevated temperature performance of sentinel valve.

To partly provide in the following description below in conjunction with the drawings and specific embodiments aspect that the present invention is described further, the present invention is additional and advantage, part will become obviously from the following description, or recognize by practice of the present invention.

Accompanying drawing explanation

Fig. 1 is the structural representation of sentinel valve of the present invention under in off position.

Fig. 2 is the structural representation of sentinel valve of the present invention under opening state.

Embodiment

Fig. 1, sentinel valve shown in 2 comprises the valve body being made up of valve body 7 and valve gap 4, between valve body 7 and valve gap 4, be provided with the first shutoff device 5, this first shutoff device 5 comprises the guide sleeve 520 being mounted between valve body 7 and valve gap 4 and the piston valve core 510 matching with the endoporus of this guide sleeve 520, this piston valve core 510 is the hollow structure being made up of refractory metal and having base plate 511 and sidewall 512, the inner chamber of piston valve core 510 communicates with rear air cavity 12, described base plate 511 coordinates with valve port 8 sealings, sidewall 512 and guide sleeve 520 endoporus Spielpassung, spring 9 for keeping piston valve core 510 to move to valve port 8 is installed between base plate 511 inner sides and valve gap 4, in valve body 7, being provided with can be by the valve port 8 sealing in the base plate 511 of the locational piston valve core 510 that moves forward, air cavity 6 before forming between whole the first shutoff device 5 and valve body 7, air cavity 12 after forming between the first shutoff device 5 and valve gap 4, between front air cavity 6 and rear air cavity 12, be communicated with via the gas port being arranged in this sentinel valve, this gas port can be the matching gap between sidewall 512 and guide sleeve 520 endoporus, or/and be opened on guide sleeve 520 be communicated with front air cavity 6 and rear air cavity 12 gas port 524, or/and be positioned at valve body be communicated with front air cavity 6 and rear air cavity 12 gas port, the top of valve gap 4 is provided with the second shutoff device, the top of valve gap 4 is provided with a gas circuit and valve body gland 16 independent of each other, the second shutoff device has adopted edge to be fixed on dynamic diaphragm between valve gap 4 and gland 16 as the second closure member 1, the below that is positioned at the second closure member 1 in valve gap 4 is provided with can be by suction chamber 2 and the exhaust chamber 15 blocked in locational the second closure member 1 that moves forward, described suction chamber 2 and rear air cavity 12 conductings, exhaust port 11 conductings of exhaust chamber 15 and valve gap 4 sidepieces, the second closure member 1 is kept by the spring 10 between the second closure member 1 and gland 16, the bottom of gland 16 is provided with the return chamber suitable with the second closure member 1, in the time that the second closure member 1 moves to return chamber, suction chamber 2 and exhaust chamber 15 conductings, and gland 4 is provided with the ventilating hole 17 with the conducting of return chamber, described ventilating hole 17 is connected with an electromagnetism-gas-driving valve, can or from this ventilating hole 17, discharge and control the control gas that the second closure member 1 moves forward and backward to input in ventilating hole 17 by this electromagnetism-gas-driving valve.

If above-mentioned sentinel valve is during as high temperature filtration deduster deashing sentinel valve, its working procedure is: come from the high temperature purge gas of suction port 14 of valve body 7 on the one hand by being communicated with front air cavity 6 and rear air cavity 12 gas ports enter rear air cavity 12 and suction chamber 2, enter on the other hand front air cavity 6, simultaneously, electromagnetism-gas-driving valve (being mark in figure) passes into normal temperature nitrogen (control gas) to ventilating hole 17, now, piston valve core 510 both sides air pressure and all reach balance as the dynamic diaphragm both sides air pressure of the second closure member 1, piston valve core 510 and the second closure member 1 are all set up in anterior displacement under the effect of spring separately, at this moment, the base plate 511 of piston valve core 510 seals valve port 8, as the dynamic diaphragm blocking-up suction chamber 2 of the second closure member 1 and exhaust chamber 15(referring to Fig. 1), in the time will carrying out blowback, make return chamber by ventilating hole 17 by electromagnetism-gas-driving valve, electromagnetism-gas-driving valve discharges normal temperature nitrogen (control gas), return chamber decompression, overcome spring 10 pressure as the dynamic diaphragm of the second closure member 1 moves after return chamber, suction chamber 2 and exhaust chamber 15 and then conducting, at this moment, gas in rear air cavity 12 is discharged from exhaust port 11 rapidly, cause rear air cavity 12 decompressions, piston valve core 510 overcome spring 9 pressure backward air cavity 12 move, the base plate 511 of piston valve core 510 is separated with valve port 8, high temperature purge gas sprays (referring to Fig. 2) from valve port 8, finally act on filter core.Visible, no matter be the control gas that moves forward to block suction chamber 2 and exhaust chamber 15 to return chamber input control as the dynamic diaphragm of the second closure member 1, or the control gas in return chamber is discharged so that move after dynamic diaphragm, all realize by the electromagnetism-gas-driving valve being connected with ventilating hole 17, the control gas that debouches return chamber adopts normal temperature nitrogen, and high temperature blowback air can not enter in return chamber, like this, just can effectively protect the component of gland 16 parts, reduce again the seal point of gland 16 parts simultaneously, improve thus the applied at elevated temperature performance of sentinel valve.In addition, because piston valve core is made up of refractory metal, and with guide sleeve endoporus Spielpassung, therefore piston valve core can at high temperature carry out permanently effective sealing to valve 8.

On the basis of above-mentioned sentinel valve structure, described gland 16 is preferably communicated with electromagnetism-gas-driving valve by a middle air pipe 18, thereby make this electromagnetism-gas-driving valve away from gland 16, can reduce the ambient temperature of electromagnetism-gas-driving valve, make electromagnetism-gas-driving valve stable operation for a long time.As Fig. 1,2, the concrete structure of gland 16 parts is preferably designed for: gland 16 is cylindricality, and its lower end is the flange being connected with valve gap 4 end faces, and described return chamber, ventilating hole 17 arrange from the bottom to top in the axial direction of gland 16; Described middle air pipe 18 is axially connected in the upper end of gland 16 and the ventilating hole 17 of gland 16 is communicated with.Middle air pipe 18 can directly be welded on the end face of gland 16, also can take the modes such as screw thread to be connected with gland 16.In said structure, the structure of gland 16 is very simple and be convenient to manufacture, between gland 16 and valve gap 4, installs and relates to sealing as the dynamic diaphragm place of the second closure member 1, and gland 16 inside are without other Seal Design, and working stability is very high.In addition, on the wall of middle air pipe 18, interval has multiple radiating grooves 19 vertically, to increase the surface area of middle air pipe, accelerates heat radiation.On this basis, in radiating groove 19, can fill radiating fin 13, radiating fin 13 adopts the material that thermal conductivity is good, further improves the heat dissipation potential of middle air pipe 18, better protects electromagnetism-gas-driving valve.Electromagnetism-gas-driving valve preferably adopts explosion-proof type electromagnetism-gas-driving valve.Explosion-proof type electromagnetism-gas-driving valve can be selected from the multiple electromagnetism-gas-driving valve with explosion prevention function on the market.In addition, electromagnetism-gas-driving valve concrete structure is prior art, and the application is superfluous words no longer.

Embodiment

As Fig. 1,2, in sentinel valve in the valve body being formed by valve body 7 and valve gap 4, the guide sleeve 520 of being made up of stainless steel is fixed between valve body 7 and installation end face corresponding to valve gap 4, and by arrange and be connected with valve gap 4 with valve body 7 through the many bolt connection pieces 3 of valve gap 4, guide sleeve 520 and valve body 7 along the circumferential interval of guide sleeve 520 simultaneously.Like this, valve gap 4, valve body 7 and guide sleeve 520 are connected as one simultaneously.On guide sleeve 520, between the endoporus of guide sleeve 520 and the outer side wall of guide sleeve 520, also have chamber groove 521, described chamber groove 521 comprises the first chamber groove 521a that is positioned at guide sleeve 520 one end and the second chamber groove 521b that is positioned at guide sleeve 520 the other ends, between the first chamber groove 521a and the second chamber groove 521b, interval forms the guide wall 523 having between transverse slat 522, the first chamber groove 520a and the second chamber groove 520b and the endoporus of guide sleeve 520 with sidewall 512 shaft hole matchings of piston valve core 510.Guide sleeve 520 is designed to the above-mentioned this structure that has chamber groove 521, alleviate on the one hand the weight of guide sleeve 520, on the other hand, owing to having taked chamber groove 521 to comprise to be positioned at the first chamber groove 521a of guide sleeve 520 one end and being positioned at the second chamber groove 521b of guide sleeve 520 the other ends, between the first chamber groove 521a and the second chamber groove 521b, interval forms transverse slat 522, between the first chamber groove 520a and the second chamber groove 520b and the endoporus of guide sleeve 520, there is the structure with the guide wall 523 of sidewall 512 shaft hole matchings of piston valve core 510, guide wall 523 can either be supported by middle transverse slat 522, guarantee that again the structural strength between guide wall 523 and transverse slat 522 (arranges after the first chamber groove 521a and the second chamber groove 521b, transverse slat 522 is more approaching apart from the distance at guide wall 523 two ends, therefore can improve the structural strength between guide wall 523 and transverse slat 522).In addition, on transverse slat 522, also have the processing of this gas port 524 of gas port 524(that is communicated with front air cavity 6 and rear air cavity 12 very convenient).The piston valve core 510 of installing in guide sleeve 520 endoporus is made up of fine aluminium, the cup-shaped structure of this piston valve core 510 for being formed by base plate 511 and sidewall 512, and the internal surface of base plate 511 is provided with positioning step 513, so that mounting spring 9.The processing external diameter of the sidewall 512 of piston valve core 510, design take the monolateral matching gap under use state between this sidewall 512 and guide sleeve 520 endoporus as 0.05-0.15mm, when design, also should consider the material swell increment of piston valve core 510 under design temperature (temperature when sentinel valve specifically uses).Monolateral matching gap under use state between sidewall 512 and guide sleeve 520 endoporus is remained on to the scope of 0.05-0.15mm; can between sidewall 512 and guide sleeve 520 endoporus, form air film; both there is air cavity 12 and front air cavity 6 after conducting and acted on, simultaneously effectively can frictionally damage in the time of relative movement between protective side wall 512 and guide sleeve 520 endoporus.

Claims

1. sentinel valve, comprise the valve body being formed by valve body (7) and valve gap (4), between valve body (7) and valve gap (4), be provided with the first shutoff device (5), the first shutoff device (5) has reciprocating the first closure member, in valve body (7), being provided with can be by the valve port (8) sealing in locational the first closure member that moves forward, air cavity (6) before forming between the first shutoff device (5) and valve body (7), air cavity (12) after forming between the first shutoff device (5) and valve gap (4), between front air cavity (6) and rear air cavity (12), be communicated with via the gas port being arranged in this sentinel valve, the top of described valve gap (4) is provided with the second shutoff device, the second shutoff device has reciprocally mobile the second closure member (1), the below that is positioned at the second closure member (1) in valve gap (4) is provided with can be by suction chamber (2) and the exhaust chamber (15) in locational the second closure member (1) blocking-up that moves forward, described suction chamber (2) and rear air cavity (12) conducting, exhaust port (11) conducting of exhaust chamber (15) and valve gap (4) sidepiece, it is characterized in that: described the first shutoff device (5) comprises the guide sleeve (520) being mounted between valve body (7) and valve gap (4) and matches using the piston valve core as described the first closure member (510) with the endoporus of this guide sleeve (520), this piston valve core (510) is a hollow structure of being made up and having base plate (511) and sidewall (512) of refractory metal, the inner chamber of piston valve core (510) communicates with rear air cavity (12), described base plate (511) coordinates with valve port (8) sealing, sidewall (512) and guide sleeve (520) endoporus Spielpassung, between base plate (511) inner side and valve gap (4), be provided with for keeping the spring (9) of piston valve core (510) to valve port (8) motion.

2. sentinel valve as claimed in claim 1, it is characterized in that: on described guide sleeve (520), be positioned between the endoporus of guide sleeve (520) and the outer side wall of guide sleeve (520) and have chamber groove (521), described chamber groove (521) comprises the first chamber groove (521a) that is positioned at guide sleeve (520) one end and the second chamber groove (521b) that is positioned at guide sleeve (520) the other end, between the first chamber groove (521a) and the second chamber groove (521b), interval forms transverse slat (522), between the first chamber groove (520a) and the second chamber groove (520b) and the endoporus of guide sleeve (520), there is the guide wall (523) with sidewall (512) shaft hole matching of piston valve core (510).

3. sentinel valve as claimed in claim 2, is characterized in that: on described transverse slat (522), have the gas port (524) that is communicated with front air cavity (6) and rear air cavity (12).

4. the sentinel valve as described in claim 1,2 or 3, is characterized in that: the monolateral matching gap between the sidewall (512) of piston valve core (510) and guide sleeve (520) endoporus under use state is 0.05-0.15mm.

5. the sentinel valve as described in claim 1,2 or 3, it is characterized in that: the top of valve gap (4) is provided with a gas circuit and valve body gland independent of each other (16), described the second closure member (1) is arranged between this gland (16) and valve gap (4) and by the spring (10) being positioned between the second closure member (1) and gland (16) and is kept, the bottom of gland (16) is provided with the return chamber suitable with the second closure member (1), in the time that the second closure member (1) moves to return chamber, suction chamber (2) and exhaust chamber (15) conducting; And, gland (4) is provided with the ventilating hole (17) with the conducting of return chamber, described ventilating hole (17) is connected with an electromagnetism-gas-driving valve, thereby is inputted or from this ventilating hole (17), discharge and control the control gas that the second closure member (1) moves forward and backward in ventilating hole (17) by this electromagnetism-gas-driving valve.

6. sentinel valve as claimed in claim 5, is characterized in that: described the second closure member (1) adopts edge to be fixed on the dynamic diaphragm between valve gap (4) and gland (16).

7. sentinel valve as claimed in claim 5, is characterized in that: described gland (16) is communicated with electromagnetism-gas-driving valve by middle air pipe (18), thereby makes this electromagnetism-gas-driving valve away from gland (16).

8. sentinel valve as claimed in claim 7, is characterized in that: described gland (16) is cylindricality, and its lower end is the flange being connected with valve gap (4) end face, and described return chamber, ventilating hole (17) arrange from the bottom to top in the axial direction of gland (16); Described middle air pipe (18) is axially connected in the upper end of gland (16) and the ventilating hole (17) of gland (16) is communicated with.

9. sentinel valve as claimed in claim 7 or 8, is characterized in that: on the wall of described middle air pipe (18), interval has radiating groove (19) vertically.

10. the sentinel valve as described in claim 1,2 or 3, it is characterized in that: described guide sleeve (520) is fixed between valve body (7) and installation end face corresponding to valve gap (4), and by circumferentially arrange and be connected with valve gap (4) with valve body (7) through the many bolt connection pieces (3) of valve gap (4), guide sleeve (520) and valve body (7) in interval along guide sleeve (520) simultaneously.