CN1558127B

CN1558127B - Full ceramic lining corrosion-resistant wear-resistant high temperature-resistant gate valve

Info

Publication number: CN1558127B
Application number: CN 200410022879
Authority: CN
Inventors: 曾杰武; 谭广明; 彭立力
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-02-07
Filing date: 2004-02-07
Publication date: 2010-09-08
Anticipated expiration: 2024-02-07
Also published as: CN1558127A

Abstract

The present invention is one kind of anticorrosive, antiwear and high temperature resistant gate valve with complete ceramic lining. The technological scheme includes right and left valve passage with ceramic lining, valve seat lining of ceramic, valve rod and gate plate with ceramic lining, valve cavity with ceramic lining, the sealed fitting between valve rod and ceramic lining in the lower part of the stuffing box and the sealed fitting between gate plate and valve seat lining of the closed valve. The complete ceramic lining makes the gate valve capable of resisting corrosion of chemical matter, erosion, wear and cavitation of high temperature and high pressure fluid and powder medium. The gate valve with greatly prolonged life may be used in various industry.

Description

Full ceramic lined corrosion resistant, wear-resisting, high temperature resistant gate valve

Technical field

The present invention relates to a kind of gate valve, particularly a kind of gate valve that can be used in the industries such as thermoelectricity plant, oil, petrochemical industry, chemical industry, mine, metallurgy.

Background technique

The gate valve of under the operating mode of chemical substance or High Temperature High Pressure, working, its flashboard, valve rod, valve road and valve seat are because be subjected to the burn into of chemical substance or the washing away of high-temperature, high pressure fluid, powder medium, wearing and tearing and cavitation, wearing and tearing and erosion are very fast, for solving wear problem, local lining pottery is arranged also.As the Zhang Zhongqiao invention at No. 25, Shi Pu South Road, Wenzhou City, Zhejiang Province Ouhai District Yongzhong town, and in " gate valve " of on December 8th, 1998 application patent of invention (its number of patent application is: 98125912, authorization notification number: 1101906, open/notification number: 1223349, open/day for announcing: on July 21st, 1999, notice of authorization day: on February 19th, 2003), its valve seat comprises with a left side, the structural ceramics of right valve channel taper fit or the left side of special cermacis, right valve seat and the pressing plate of being joined, an and left side, the seal face of right valve seat forms angle, flashboard has central shaft, left and right mounting plate, upper and lower grip block, the left side of structural ceramics or special cermacis and a right seal ring and a left side, right platen, seal ring embeds mounting plate and forms taper fit, the platen that cooperates with the seal ring hole taper welds with mounting plate, and the seal face of seal ring forms the angle of wedge, central shaft then connects with valve rod, gate valve with above-mentioned feature can bear washing away of high temperature and high pressure flow body medium, wearing and tearing and cavitation, can increase the service life, but because of its just local lining pottery, the valve pocket inwall, valve rod, the corrosion that medium is still being born at positions such as flashboard perisporium and valve road, wash away, wearing and tearing and cavitation, fundamentally do not solve its corrosion resistant, wear-resisting problem, therefore, the effect that increases the service life is not good enough.

Summary of the invention

The purpose of this invention is to provide a kind of full ceramic lined corrosion resistant that can greatly increase the service life, wear-resisting, high temperature resistant gate valve.

The technical solution adopted for the present invention to solve the technical problems is: it comprises having a left side, the valve body 3 of right valve channel, flashboard 20, valve pocket 16, valve seat lining 19, valve rod 5, be filled with the stuffing box 7 of filler 15, by match with stuffing box 7 Gland 10 of suit of bolt and nut cover 9, the top of valve rod 5 is connected with handwheel 12 with matching, flashboard 20 matches with valve pocket 16, the perisporium lining that the valve rod that links to each other with flashboard 20 cuts periphery and flashboard 20 for 5 times has pottery, the perisporium lining ceramic lined 18 of valve pocket 16, the left side of described valve body 3, right valve channel inwall lining has pottery, valve seat lining 19 also adopts pottery, valve rod 5 is sealed and matched for 8 one-tenth with the ceramic chamber lining that is sleeved on stuffing box 7 bottoms, when valve closing, flashboard 20 is sealed and matched for 19 one-tenth with the valve seat lining, the side of flashboard 20 is provided with ceramic guiding element 4, is provided with the ceramic guide groove 17 that matches with ceramic guiding element 4 at the inwall of valve pocket 16.The cross section of valve pocket 16 is circular, oval or irregular circular arc, square or polygonal.Flashboard 20 can be made into wedge-shaped structure wide at the top and narrow at the bottom.The position of the corresponding flashboard 20 of valve road downside is provided with chamber 21 at the bottom of the valve that communicates with the valve road, and the perisporium in chamber 21 and bottom lining have pottery at the bottom of the valve.End cap 2 is sleeved on the bottom in chamber 21 at the bottom of the valve by screw rod 1.Chamber 21 is square at the bottom of the valve, and end cap 2 matches with chamber at the bottom of the valve 21.

The present invention by body cavity, valve road inwall, and flashboard and valve rod perisporium etc. all with through the equal lining pottery in the contacted position of medium in the valve body, thereby make gate valve more can bear the washing away of fluid, powder medium, wearing and tearing or the cavitation of the corrosion of chemical substance and High Temperature High Pressure, greatly increase the service life, it can be used in the industries such as thermoelectricity plant, oil, petrochemical industry, chemical industry, mine, metallurgy.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the structural representation of valve body.

Fig. 3 is the plan structure schematic representation of Fig. 2.

Fig. 4 is the left TV structure schematic representation of Fig. 2.

Fig. 5 is the worm's eye view of Fig. 4.

Fig. 6 is the structural representation of valve rod.

Fig. 7 is the left TV structure schematic representation of Fig. 6.

Among the figure: 1. screw rod, 2. end cap, 3. valve body, 4. ceramic guiding element, 5. valve rod, 6. bolt and nut cover, 7. stuffing box, 8. ceramic chamber lining, 9. bolt and nut cover, 10. Gland, 11. swivel nuts, 12. handwheels, 13. key pin, 14. nuts, 15. fillers, 16. valve pocket, 17. guide grooves, 18. ceramic lineds, 19. the valve seat lining, 20 flashboards, chamber at the bottom of 21. valves.

Embodiment

Embodiment 1, the present invention includes and have a left side, the valve body 3 of right valve channel, flashboard 20, valve pocket 16, valve seat lining 19, valve rod 5, be filled with the stuffing box 7 of filler 15, by match with stuffing box 7 Gland 10 of suit of bolt and nut cover 9, the top of valve rod 5 is connected with handwheel 12 with matching, flashboard 20 matches with valve pocket 16, the left side of described valve body 3, right valve channel inwall lining has pottery, valve seat lining 19 also adopts pottery, the perisporium lining that the valve rod that links to each other with flashboard 20 cuts periphery and flashboard 20 for 5 times has pottery, the perisporium lining ceramic lined 18 of valve pocket 16, valve rod 5 is sealed and matched for 8 one-tenth with the ceramic chamber lining that is sleeved on stuffing box 7 bottoms, when valve closing, rotation hand wheel 12 descends flashboard 20, thereby flashboard 20 is sealed and matched for 19 one-tenth with the valve seat lining; When valve opening, rotation hand wheel 12 makes flashboard 20 rise to valve pocket 16, thereby the left and right valve road of valve body communicates.It by body cavity, valve road inwall, and flashboard and valve rod perisporium etc. all with through the equal lining pottery in the contacted position of medium in the valve body, thereby make gate valve more can bear the washing away of fluid, powder medium, wearing and tearing or the cavitation of the corrosion of chemical substance and High Temperature High Pressure, greatly increase the service life, it can be used in the industries such as thermoelectricity plant, oil, petrochemical industry, chemical industry, mine, metallurgy.Consult Fig. 1 to Fig. 7.

Embodiment 2, and the stuffing box 7 that is filled with filler 15 is connected with Gland 10 by bolt and nut cover 9, thereby can fill filler and installation valve rod 5 very easily.The top of valve rod 5 cooperates suit handwheel 12 by swivel nut 11, nut 14 and key pin 13, thereby makes the installation of handwheel 12 very easy.Stuffing box 7 is installed in the top of valve body 3 by bolt and nut cover 6, and suit pottery backing member between stuffing box 7 and valve body 3 also can be realized being sealed and matched to valve pocket 16 and valve rod 5 very easily so easily.Consult Fig. 1 to Fig. 7, all the other are with embodiment 1.

Embodiment 3, and valve pocket 16 can be made into circular, the oval or irregular circular arc of cross section.Consult Fig. 1, all the other are with embodiment 1.

Embodiment 4, make square the cross section of valve pocket 16 or polygonal, like this, lining ceramic lined 18 in valve pocket 16 very easily, it has changed traditional fixed pattern and the custom of only making cylindric valve pocket usually, and it makes the manufacturing process of gate valve simpler.Consult Fig. 2 to Fig. 5, all the other are with above-mentioned embodiment.

Embodiment 5, and flashboard 20 is made wedge-shaped structure wide at the top and narrow at the bottom, like this, can be very easily at the perisporium lining pottery backing member of flashboard 20, it makes the manufacturing process of flashboard lining pottery simpler; Make wedge-shaped structure when gate valve is closed, can make flashboard 20 and valve seat lining 19 realize sealing more easily.Consult Fig. 1 and Fig. 2, all the other are with above-mentioned embodiment.

Embodiment 6, and the position of the corresponding flashboard 20 of valve road downside is provided with chamber 21 at the bottom of the valve that communicates with the valve road, by screw rod 1 end cap 2 is sleeved on the valve body 3, and chamber 21 can be an arbitrary shape at the bottom of the valve, but end cap 2 must match with chamber at the bottom of the valve 21.By this dismountable movable cooperation, but simplified manufacturing technique, and the lining pottery is convenient.Consult Fig. 1, all the other are with embodiment 5.

Embodiment 7, and chamber 21 is made squarely at the bottom of the valve, and end cap 2 must match with chamber at the bottom of the valve 21.Like this, lining ceramic lined in chamber at the bottom of the valve 21 very easily, it makes the lining ceramic process of whole gate valve simpler.Consult Fig. 1 and Fig. 5, all the other are with embodiment 6.

Embodiment 8, are provided with ceramic guiding element 4 in the side of flashboard 20, are provided with the ceramic guide groove 17 that matches with ceramic guiding element 4 at the inwall of valve pocket 16, do not deflect when flashboard 20 moves up and down, thereby can accurately locate when making flashboard 20 work.Consult Fig. 1, all the other are with above-mentioned embodiment.

Obviously, valve rod driving mode: can comprise manpower, surge, driving mode such as pneumatic, electronic that its valve rod driving mode can not only be confined to be made up of valve pocket 11 and nut 14 and handwheel 12.

Claims

1. full ceramic lined corrosion resistant, wear-resisting, high temperature resistant gate valve, it comprises having a left side, the valve body of right valve channel (3), flashboard (20), valve pocket (16), valve seat lining (19), valve rod (5), be filled with the stuffing box (7) of filler (15), by match with stuffing box (7) Gland (10) of suit of bolt and nut cover (9), the top of valve rod (5) is connected with handwheel with matching (12), flashboard (20) matches with valve pocket (16), the following section periphery of valve rod (5) that links to each other with flashboard (20) and the perisporium lining of flashboard (20) have pottery, the perisporium lining ceramic lined (18) of valve pocket (16), it is characterized in that: the left side of described valve body (3), right valve channel inwall lining has pottery, valve seat lining (19) also adopts pottery, valve rod (5) becomes to be sealed and matched with the ceramic chamber lining (8) that is sleeved on stuffing box (7) bottom, when valve closing, flashboard (20) becomes to be sealed and matched with valve seat lining (19), the side of flashboard (20) is provided with ceramic guiding element (4), is provided with the ceramic guide groove (17) that matches with ceramic guiding element (4) at the inwall of valve pocket (16).

2. full ceramic lined corrosion resistant according to claim 1, wear-resisting, high temperature resistant gate valve is characterized in that: circular, the oval or irregular circular arc of the cross section of valve pocket (16).

3. full ceramic lined corrosion resistant according to claim 1, wear-resisting, high temperature resistant gate valve is characterized in that: the cross section squarely or the polygonal of valve pocket (16).

4. according to claim 1,2 or 3 described full ceramic lined corrosion resistants, wear-resisting, high temperature resistant gate valve, it is characterized in that: flashboard (20) is a wedge-shaped structure wide at the top and narrow at the bottom.

5. according to claim 1,2 or 3 described full ceramic lined corrosion resistants, wear-resisting, high temperature resistant gate valve, it is characterized in that: the position of the corresponding flashboard of valve road downside (20) is provided with chamber (21) at the bottom of the valve that communicates with the valve road, and the perisporium and the bottom lining of chamber at the bottom of the valve (21) have pottery.

6. full ceramic lined corrosion resistant according to claim 5, wear-resisting, high temperature resistant gate valve is characterized in that: the bottom of chamber at the bottom of valve (21) is by screw rod (1) suit end cap (2).

7. full ceramic lined corrosion resistant according to claim 6, wear-resisting, high temperature resistant gate valve is characterized in that: for square, end cap (2) matches with chamber at the bottom of the valve (21) chamber at the bottom of the valve (21).