CN109139951B - Corrosion-resistant gate valve and boiler shutoff valve - Google Patents
Corrosion-resistant gate valve and boiler shutoff valve Download PDFInfo
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- CN109139951B CN109139951B CN201811319875.2A CN201811319875A CN109139951B CN 109139951 B CN109139951 B CN 109139951B CN 201811319875 A CN201811319875 A CN 201811319875A CN 109139951 B CN109139951 B CN 109139951B
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- 238000005260 corrosion Methods 0.000 title claims abstract description 35
- 230000007797 corrosion Effects 0.000 title claims description 12
- 238000007789 sealing Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000007789 gas Substances 0.000 abstract description 139
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 10
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 7
- 238000006477 desulfuration reaction Methods 0.000 abstract description 6
- 230000023556 desulfurization Effects 0.000 abstract description 6
- 239000003546 flue gas Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 239000011324 bead Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0227—Packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention provides an anti-corrosion gate valve and a boiler shutoff valve, which relate to the technical field of auxiliary valves of boilers and comprise: the valve comprises a valve main body, a valve switch part, a shutoff page, a gas channel and a gas supply device; the valve switch part drives the shutoff page to move relative to the valve main body, the shutoff page is closed, the valve main body is closed, the gas supply device is used for conveying gas for the gas channel fixed on the inner wall of the valve main body, the gas in the gas channel is discharged through the gas outlet, the gas is converged into a positive pressure area on one side of the shutoff page close to the corrosive gas, the corrosive gas is effectively prevented from contacting with the shutoff page, sulfur dioxide and sulfur trioxide contained in desulfurization flue gas in the prior art can corrode the shutoff valve, the phenomenon that the shutoff valve cannot be opened again is caused, the induced draft fan is corroded, leaked and rotor balance is destroyed, the technical problem of economic loss is easily caused, the boiler valve is effectively prevented from being corroded, and the technical effect of the service life of the boiler valve is prolonged is realized.
Description
Technical Field
The invention relates to the technical field of auxiliary valves of boilers, in particular to an anti-corrosion gate valve and a boiler shutoff valve.
Background
The shut-off valve is a common part of auxiliary machinery of the boiler, and is mainly used for cutting off gas medium in a pipeline in a desulfurization and denitration process of the boiler. The large-tonnage boiler is often operated in parallel with an induced draft fan. In the non-heating season or the production reduction stage, one induced draft fan in the parallel pipe network needs to be closed. At this point a conventional shut-off valve is required to close one of the lines. This results in a back-flow of flue gas in the desulfurizing or denitrating tower.
The sulfur dioxide and sulfur trioxide and other corrosive gases contained in the desulfurization flue gas form low-temperature dew condensation at the position, and the shutoff valve can be corroded after a few days and a few months, so that the shutoff valve cannot be opened again, even the flue gas leaks to pollute the atmosphere, and the induced draft fan can corrode, leak and damage the rotor balance, so that economic loss is very easy to cause.
However, most of the methods adopted at present in China are common material shut-off valves additionally provided with sealing strips, and the corroded parts need to be replaced or welded irregularly. And part of valves are made of stainless steel 304 or even 316L, so that the valves are expensive to manufacture, and still need to be maintained or replaced at random, and the use effect is still not ideal. The dew corrosion problem remains serious. As contact of the corrosive gas with the valve components is not fundamentally resolved.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide an anti-corrosion gate valve and a boiler shutoff valve, which are used for solving the technical problems that sulfur dioxide and sulfur trioxide contained in desulfurization flue gas in the prior art corrode the shutoff valve and cannot be opened again, and also cause corrosion, leakage and rotor balance damage of a draught fan, so that economic loss is very easy to cause.
The invention provides an anti-corrosion gate valve, comprising: the valve comprises a valve main body, a valve switch part, a shutoff page, a gas channel and a gas supply device;
the shut-off page is arranged in the valve main body, and the valve switch part is in transmission connection with the shut-off page so as to drive the shut-off page to move relative to the valve main body;
the gas channel is connected with the inner wall of the valve main body, the gas supply device is communicated with the gas channel to convey gas into the gas channel, the gas channel is provided with a gas outlet, and the gas in the gas channel flows to a direction far away from the shut-off page through the gas outlet so that one side of the shut-off page forms a gas circulation area.
Further, the valve switch part comprises a steering wheel and a screw rod assembly;
the steering wheel is in transmission connection with the shut-off page through the screw rod assembly, so that the steering wheel drives the shut-off page to move relative to the valve main body through the screw rod assembly.
Further, the anti-corrosion gate valve further comprises a sealing member;
the sealing member is connected with the inner wall of the valve body and is used for sealing the shut-off page from the valve body so as to prevent gas from flowing through a gap between the shut-off page and the valve body.
Further, the sealing members are provided in two;
the two sealing members are respectively arranged at the two sides of the shut-off page, and are both connected with the inner wall of the valve main body.
Further, the sealing member is provided as a bead plate.
Further, the air supply device comprises a high-pressure centrifugal fan and a motor;
the high-pressure centrifugal fan and the motor are both arranged on the outer surface of the valve main body, the motor is electrically connected with the high-pressure centrifugal fan, and the high-pressure centrifugal fan is used for conveying gas for the gas channel.
Further, the anti-corrosion gate valve also comprises a connecting piece;
the connecting piece is arranged on the outer surface of the valve main body, and the motor is fixed on the outer surface of the valve main body through the connecting piece.
Further, the material of the shut-off page is Q235 plate.
Further, the included angle between the air outlet direction of the air outlet and the turn-off page is 10-50 degrees.
The invention provides a boiler shut-off valve, which comprises an anti-corrosion gate valve.
By combining the technical scheme, the invention has the beneficial effects that:
the invention provides an anti-corrosion gate valve, comprising: the valve comprises a valve main body, a valve switch part, a shutoff page, a gas channel and a gas supply device;
the shut-off page is arranged in the valve main body, and the valve switch part is in transmission connection with the shut-off page so as to drive the shut-off page to move relative to the valve main body;
the gas channel is connected with the inner wall of the valve main body, the gas supply device is communicated with the gas channel to convey gas into the gas channel, the gas channel is provided with a gas outlet, and the gas in the gas channel flows to a direction far away from the shut-off page through the gas outlet so that one side of the shut-off page forms a gas circulation area.
The valve switch part drives the shutoff page to move relative to the valve main body, the shutoff page is closed, the valve main body is closed, the gas supply device is used for conveying gas for the gas channel fixed on the inner wall of the valve main body, the gas in the gas channel is discharged through the gas outlet, the gas is converged into a positive pressure area on one side of the shutoff page close to the corrosive gas, the corrosive gas is effectively prevented from contacting with the shutoff page, sulfur dioxide and sulfur trioxide contained in desulfurization flue gas in the prior art can corrode the shutoff valve, the phenomenon that the shutoff valve cannot be opened again is caused, the induced draft fan is corroded, leaked and rotor balance is destroyed, the technical problem of economic loss is easily caused, the boiler valve is effectively prevented from being corroded, and the technical effect of the service life of the boiler valve is prolonged is realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of an anti-corrosion gate valve according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an anti-corrosion gate valve according to an embodiment of the present invention at a first view angle;
FIG. 3 is a schematic view of a corrosion protection gate valve according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of gas flow through an anti-corrosion gate valve according to an embodiment of the present invention.
Icon: 100-valve body; 200-valve opening and closing parts; 210-steering wheel; 220-screw assembly; 300-off page; 400-gas channel; 500-air supply device; 510-a centrifugal fan; 520-motor; 600-sealing member; 700-connecting piece; 800-positive pressure region.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are used, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the indicated apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it should be noted that unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
FIG. 1 is a schematic diagram of the overall structure of an anti-corrosion gate valve according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the corrosion gate valve according to the present embodiment at a first viewing angle, where the first viewing angle is a front view of the shutdown page 300.
Fig. 3 is a schematic structural diagram of the corrosion gate valve according to the present embodiment at a second viewing angle, which is a front view of the valve opening and closing portion 200.
FIG. 4 is a schematic diagram of gas flow through an anti-corrosion gate valve according to an embodiment of the present invention.
As shown in fig. 1 to 4, the anti-corrosion gate valve provided in this embodiment includes: a valve main body 100, a valve opening and closing part 200, a shut-off sheet 300, a gas passage 400, and a gas supply device 500; the shut-off page 300 is arranged in the valve main body 100, and the valve switch part 200 is in transmission connection with the shut-off page 300 so as to drive the shut-off page 300 to move relative to the valve main body 100; the gas channel 400 is connected with the inner wall of the valve body 100, and the gas supply device 500 is communicated with the gas channel 400 to supply gas into the gas channel 400, and a gas outlet is arranged on the gas channel 400, and the gas in the gas channel 400 flows in a direction away from the shut-off sheet 300 through the gas outlet, so that one side of the shut-off sheet 300 forms a gas circulation area.
Specifically, the valve main body 100 is internally provided with the shut-off sheet 300, the valve switch part 200 is in transmission connection with the shut-off sheet 300, when the valve main body 100 is in a closed state, the shut-off sheet 300 is driven by the valve switch part 200 to extend into the valve main body 100 to block gas flow, at the moment, the corrosive gas in the boiler does not flow so as to be easy to contact with the shut-off sheet 300 in the valve main body 100, the gas channel 400 is arranged beside the shut-off sheet 300, the gas supply device 500 supplies gas to the gas channel 400, the gas in the gas channel 400 is discharged through the gas outlet, so that a gas positive pressure area 800 is formed on one side of the shut-off sheet 300 close to the corrosive gas, the gas positive pressure area 800 is used for blocking the corrosive gas from contacting with the shut-off sheet 300, the corrosive gas corrosion of the shut-off sheet 300 is effectively avoided, the service life of the valve is prolonged, the induced draft fan is also prevented from being corroded by the corrosive gas, and the replacement use cost of the valve is reduced.
Further, the material of the shut-off sheet 300 is Q235 sheet material.
Specifically, due to the arrangement of the gas channel 400, the gas supply device 500 transmits the gas to the side of the shut-off sheet 300 close to the corrosive gas through the gas channel 400, the gas forms the positive pressure area 800 to block the corrosive gas from the shut-off sheet 300, and the material of the shut-off sheet 300 can not be set as an anti-corrosive material because the shut-off sheet 300 cannot be contacted with the corrosive gas, so that the material cost of the shut-off sheet 300 is effectively saved.
Q235 is low carbon steel, has good plasticity and welding performance, good forming capability, all the sections, certain strength, suitability for engineering structures such as bridges, buildings and the like, good practicality, relatively low price and high cost performance. Preferably, the material of the shut off sheet 300 is provided as a Q235 sheet.
In addition, the material of the shut down sheet 300 may be any material, not limited to Q235 plate, and shut down sheets 300 of different materials may be selected according to actual conditions.
The anticorrosive gate valve that this embodiment provided includes: a valve main body 100, a valve opening and closing part 200, a shut-off sheet 300, a gas passage 400, and a gas supply device 500; the shut-off page 300 is arranged in the valve main body 100, and the valve switch part 200 is in transmission connection with the shut-off page 300 so as to drive the shut-off page 300 to move relative to the valve main body 100; the gas channel 400 is connected with the inner wall of the valve body 100, and the gas supply device 500 is communicated with the gas channel 400 to supply gas into the gas channel 400, and a gas outlet is arranged on the gas channel 400, and the gas in the gas channel 400 flows in a direction away from the shut-off sheet 300 through the gas outlet, so that one side of the shut-off sheet 300 forms a gas circulation area. The shutoff page 300 is driven to move relative to the valve main body 100 through the valve switch part 200, the shutoff page 300 is closed, the valve main body 100 is closed, the gas supply device 500 is used for conveying gas for the gas channel 400 fixed on the inner wall of the valve main body 100, the gas in the gas channel 400 is discharged through the gas outlet, the gas is converged into a positive pressure area 800 at one side of the shutoff page 300, which is close to corrosive gas, the corrosive gas is effectively prevented from contacting with the shutoff page 300, the problem that sulfur dioxide and sulfur trioxide contained in desulfurization flue gas in the prior art corrode the shutoff valve, so that the shutoff valve cannot be opened again, the technical problems of corrosion, leakage and rotor balance damage of an induced draft fan are caused, and economic loss is extremely easy to cause are solved, the technical effects of effectively avoiding the corrosion of a boiler valve and prolonging the service life of the boiler valve are realized.
Further, the valve switch part 200 in the anti-corrosion gate valve provided in the present embodiment includes the steering wheel 210 and the screw rod assembly 220; the steering wheel 210 is in driving connection with the shut-off blade 300 through the screw assembly 220, so that the steering wheel 210 drives the shut-off blade 300 to move relative to the valve body 100 through the screw assembly 220.
Specifically, the steering wheel 210 is in transmission connection with the shut-off sheet 300 through the screw rod assembly 220, the operator rotates the steering wheel 210 to enable the steering wheel 210 to drive the shut-off sheet 300 to move relative to the valve main body 100, so that the valve main body 100 is opened and closed, when the valve main body 100 is required to be opened, the operator rotates the steering wheel 210, the shut-off sheet 300 moves out of the valve main body 100, and gas in the valve main body 100 flows; when the valve main body 100 is required to be closed, a worker rotates the steering wheel 210 to drive the shutoff sheet 300 to extend into the valve main body 100, so that the gas in the valve main body 100 is prevented from flowing, the gas supply device 500 is started to supply gas in the gas channel 400, the gas in the gas channel 400 is discharged through the gas outlet, a gas positive pressure area 800 is formed at one side of the shutoff sheet 300 close to the corrosive gas, the corrosive gas is blocked from the shutoff sheet 300, and the shutoff sheet 300 is prevented from being corroded.
Further, the anti-corrosion gate valve further includes a sealing member 600; the sealing member 600 is connected to the inner wall of the valve body 100, and the sealing member 600 serves to seal between the shut-off flap 300 and the valve body 100 to prevent gas from flowing through the gap between the shut-off flap 300 and the valve body 100.
Further, the sealing members 600 are provided in two;
the two sealing members 600 are respectively disposed at both sides of the shut-off flap 300, and both the sealing members 600 are connected with the inner wall of the valve body 100.
Further, the sealing member 600 is provided as a bead plate.
Specifically, the sealing member 600 is disposed in the valve main body 100, the sealing member 600 is disposed on two sides of the shut-off sheet 300, so that a gap between the shut-off sheet 300 and the valve main body 100 is sealed, sealing performance of the shut-off sheet 300 is improved, when the valve main body 100 is closed, gas in the conveying channel is discharged and converged beside the shut-off sheet 300 through the gas outlet to form a gas positive pressure area 800, the sealing member 600 is disposed to prevent the gas from being discharged through the shut-off sheet 300, so that gas in the conveying channel is prevented from being out of pressure, and the gas positive pressure area 800 for isolating corrosive gas cannot be formed.
In addition, the material of the sealing member 600 may be a felt, polytetrafluoroethylene, nitrile rubber, or the like, and the sealing member 600 of a different material may be selected according to circumstances.
The anti-corrosion gate valve provided by the embodiment drives the shutoff page 300 to move relative to the valve main body 100 through the arrangement of the steering wheel 210 and the screw rod assembly 220, so as to control the on-off of the valve main body 100; the sealability of the shut down sheet 300 is increased by the provision of the sealing member 600, and leakage of gas through the shut down sheet 300 is prevented.
Further, based on the above embodiment, the air supply device 500 in the anti-corrosion gate valve provided in this embodiment includes a high-pressure centrifugal fan 510 and a motor 520; the high-pressure centrifugal fan 510 and the motor 520 are both disposed on the outer surface of the valve body 100, the motor 520 is electrically connected to the high-pressure centrifugal fan 510, and the high-pressure centrifugal fan 510 is used to deliver gas to the gas channel 400.
Specifically, the high pressure centrifugal fan 510 and the motor 520 cooperate to stabilize the delivery of gas within the gas channel 400.
Further, the anti-corrosion gate valve further includes a connector 700; the connection member 700 is disposed on the outer surface of the valve body 100, and the motor 520 is fixed to the outer surface of the valve body 100 through the connection member 700.
Specifically, the connection member 700 may be configured as a flange structure, and the connection member 700 fixes the motor 520 to the valve body 100.
Further, the included angle between the air outlet direction of the air outlet and the turn-off page 300 is 10-50 °.
Specifically, the included angle between the air outlet direction of the air outlet and the shutdown sheet 300 is 10-50 °, preferably, the included angle between the air outlet direction of the air outlet and the shutdown sheet 300 is 30 °, so that the air stays beside the shutdown sheet 300 to form an air positive pressure area 800, and corrosive air is prevented from contacting the shutdown sheet 300.
The anti-corrosion gate valve provided in this embodiment fixes the motor 520 through the connector 700 to deliver stable gas to the gas channel 400.
The boiler shut-off valve provided by the embodiment comprises an anti-corrosion gate valve.
Because the technical effect of the boiler shutoff valve provided in this embodiment is the same as that of the anti-corrosion gate valve, the details are not repeated here.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (3)
1. An anti-corrosion gate valve, comprising: the valve comprises a valve main body, a valve switch part, a shutoff page, a gas channel and a gas supply device;
the shut-off page is arranged in the valve main body, and the valve switch part is in transmission connection with the shut-off page so as to drive the shut-off page to move relative to the valve main body;
the gas channel is connected with the inner wall of the valve main body, the gas supply device is communicated with the gas channel to convey gas into the gas channel, a gas outlet is arranged on the gas channel, the gas in the gas channel flows in a direction away from the shut-off page through the gas outlet, so that a gas circulation area is formed on one side of the shut-off page, and a gas positive pressure area is formed on one side of the shut-off page close to corrosive gas;
the valve switch part comprises a steering wheel and a screw rod assembly;
the steering wheel is in transmission connection with the shut-off page through the screw rod assembly, so that the steering wheel drives the shut-off page to move relative to the valve main body through the screw rod assembly;
also includes a sealing member;
the sealing member is connected with the inner wall of the valve main body and is used for sealing the shut-off page from the valve main body so as to prevent gas from flowing through a gap between the shut-off page and the valve main body;
the number of the sealing members is two;
the two sealing members are respectively arranged at two sides of the shut-off page, and are both connected with the inner wall of the valve main body;
the sealing component is arranged as a layering pressing plate;
the air supply device comprises a high-pressure centrifugal fan and a motor;
the high-pressure centrifugal fan and the motor are arranged on the outer surface of the valve main body, the motor is electrically connected with the high-pressure centrifugal fan, and the high-pressure centrifugal fan is used for conveying gas for the gas channel;
the device is characterized by further comprising a connecting piece;
the connecting piece is arranged on the outer surface of the valve main body, and the motor is fixed on the outer surface of the valve main body through the connecting piece;
the included angle between the air outlet direction of the air outlet and the turn-off page is 10-50 degrees.
2. The corrosion protection gate valve of claim 1, wherein the material of the shut-off page is Q235 sheet material.
3. A boiler shut-off valve comprising a corrosion protection gate valve according to any one of claims 1-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319875.2A CN109139951B (en) | 2018-11-07 | 2018-11-07 | Corrosion-resistant gate valve and boiler shutoff valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319875.2A CN109139951B (en) | 2018-11-07 | 2018-11-07 | Corrosion-resistant gate valve and boiler shutoff valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109139951A CN109139951A (en) | 2019-01-04 |
| CN109139951B true CN109139951B (en) | 2024-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811319875.2A Active CN109139951B (en) | 2018-11-07 | 2018-11-07 | Corrosion-resistant gate valve and boiler shutoff valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109139951B (en) |
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| CN201715004U (en) * | 2010-02-20 | 2011-01-19 | 成都航利阀门成套设备有限公司 | High anti-corrosive flat gate-valve |
| CN202690519U (en) * | 2012-07-25 | 2013-01-23 | 济南风机厂有限责任公司 | Elastic contact carbon ring sealing assembly of fan spindle |
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