CN108869769B - Cut-off valve for auxiliary sealing of eccentric wheel and flue gas system of catalytic cracking device - Google Patents
Cut-off valve for auxiliary sealing of eccentric wheel and flue gas system of catalytic cracking device Download PDFInfo
- Publication number
- CN108869769B CN108869769B CN201710992100.0A CN201710992100A CN108869769B CN 108869769 B CN108869769 B CN 108869769B CN 201710992100 A CN201710992100 A CN 201710992100A CN 108869769 B CN108869769 B CN 108869769B
- Authority
- CN
- China
- Prior art keywords
- valve
- flashboard
- sealing
- guide rail
- eccentric wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 95
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000003546 flue gas Substances 0.000 title claims abstract description 24
- 238000004523 catalytic cracking Methods 0.000 title claims abstract description 12
- 238000012856 packing Methods 0.000 claims description 19
- 239000000956 alloy Substances 0.000 claims description 16
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 238000010926 purge Methods 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 12
- 230000003009 desulfurizing effect Effects 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 239000013049 sediment Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- F16K3/16—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 with special arrangements for separating the sealing faces or for pressing them together
-
- 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
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
-
- 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
- F16K3/316—Guiding of the slide
-
- 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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Sliding Valves (AREA)
Abstract
The invention relates to a cut-off valve with an eccentric wheel for auxiliary sealing and a catalytic cracking device flue gas system, wherein the cut-off valve comprises a valve body, a valve seat, a flashboard, a valve rod and a valve rod driving motor, a sealing surface is arranged between the valve seat and the flashboard, a valve shaft with an axis extending along the moving direction of the flashboard is arranged on the valve body, the valve shaft is positioned on one side of the flashboard far away from the sealing surface, the valve shaft is synchronously rotated and provided with the eccentric wheel, the cut-off valve also comprises the valve shaft driving motor for driving the valve shaft to rotate, and the eccentric wheel is provided with a closing position for pushing the flashboard to a set angle after being closed and an opening position for disengaging the eccentric wheel from the flashboard after being reversed. When the eccentric wheel is positioned at the opening position, the flashboard can freely open the medium flow channel, and after the flashboard is closed, the valve shaft drives the motor to drive the valve shaft to rotate so that the eccentric wheel is rotated from the opening position to the closing position, and at the moment, the eccentric wheel is propped against one side surface of the flashboard, which is far away from the sealing surface, so that hard sealing is formed between the flashboard and the valve seat, and the sealing performance is greatly improved.
Description
Technical Field
The invention relates to a cut-off valve for auxiliary sealing of an eccentric wheel and a catalytic cracking device flue gas system.
Background
The flue gas system of the catalytic cracking (DCC, deep Catalytic Cracking) device is used for desulfurizing the flue gas of the regenerated and burnt tail gas, and generally comprises a desulfurizing tower, wherein a baffle door is arranged on a bypass pipeline of the desulfurizing tower, but under the condition that the baffle door is closed, under the pressure of a medium, a sealing plate of the baffle door is easy to deform, so that the service life is short and the sealing effect is poor. The sealing plate of the baffle door is sealed by medium or sealing wind, which belongs to soft sealing strictly, and the sealing effect and service life of the baffle door are difficult to ensure under the condition of higher temperature. Because the bypass pipeline of the desulfurizing tower has limited positions, it is not advisable to arrange a water sealed tank or add a new valve.
Disclosure of Invention
The invention aims to provide a cutoff valve with good sealing performance for auxiliary sealing of an eccentric wheel; meanwhile, the invention also aims to provide a catalytic cracking device flue gas system using the shut-off valve.
In order to achieve the purpose, the invention discloses a cutoff valve for auxiliary sealing of an eccentric wheel, which adopts the following technical scheme: the utility model provides a trip valve of eccentric wheel auxiliary seal, includes the valve body, sets up the disk seat that has the medium runner in the valve body, be used for shutoff and open the flashboard of medium runner, valve rod, drive valve rod in order to drive the valve rod driving motor of flashboard translation, has sealed complex sealed face between disk seat and the flashboard, be provided with the valve shaft that the axis extends along the flashboard direction of motion on the valve body, the valve shaft is located the one side of keeping away from sealed face of flashboard, synchronous rotation is provided with the eccentric wheel on the valve shaft, this trip valve still includes the valve shaft driving motor that is used for driving valve shaft pivoted, the eccentric wheel has the flashboard to rotate to the closed position that sets for the angle roof pressure so that flashboard and disk seat sealing complex after closing, the eccentric wheel still has the open position that makes it and flashboard disconnect after the reversal.
The valve shafts are at least two in number and are arranged at two sides of the center of the flashboard at intervals in parallel, and at least one eccentric wheel is arranged on each valve shaft along the length direction of each valve shaft.
Each valve shaft is provided with a crank arm, a connecting rod is arranged between the crank arms to ensure that each valve shaft rotates synchronously, and a valve shaft driving motor is connected with one valve shaft in a transmission way.
The sealing surface is a double-sealing structure, the double-sealing structure comprises a first sealing structure formed by sealing and matching a first hard alloy surface arranged on the flashboard and a second hard alloy surface arranged on the valve seat, the double-sealing structure also comprises a packing arranged on the valve seat and internally provided with a metal wire, the second hard alloy surface is an annular surface surrounding the packing, and the packing is used for forming the second sealing structure in sealing and matching with the first hard alloy surface.
The valve body is provided with a guide rail with the length extending along the moving direction of the flashboard, the flashboard is provided with a roller which is used for guiding and moving with the guide rail, and the guide rail is provided with a flat flashboard opening section and a guide rail sealing section which protrudes towards the sealing surface to forcedly enable the flashboard to be in sealing fit with the valve seat.
The flashboard comprises a flashboard body and a connecting plate arranged on the flashboard body, two rollers are arranged on the connecting plate along the moving direction of the flashboard at intervals, the number of the guide rail sealing sections is also two, the guide rail sealing sections are arranged in a collinear manner, and the guide rail also comprises an intermediate section positioned between the two guide rail sealing sections, and the intermediate section is collinear with the flashboard opening section.
The connecting plate is provided with a cleaning device for cleaning the particle sediment on the guide rail at the corresponding roller, and the valve body is provided with a discharge port for discharging the cleaned particle sediment.
The distance between the guide rail sealing section and the protruding guide rail is less than or equal to 5mm.
The shut-off valve further comprises a purging pipe which is arranged in parallel with the guide rail, and air outlets which face the guide rail are arranged on the purging pipe at intervals along the length direction of the purging pipe.
The invention relates to a catalytic cracking device flue gas system, which adopts the following technical scheme: the utility model provides a catalytic cracking device flue gas system, includes flue gas desulfurizing tower, flue gas desulfurizing tower bypass pipeline and sets up the trip valve on flue gas desulfurizing tower bypass pipeline, and the trip valve includes the valve body, sets up the disk seat that has the medium runner in the valve body, be used for shutoff and open the flashboard of medium runner, valve rod, drive valve rod in order to drive the valve rod driving motor of flashboard translation, has sealed complex sealed face between disk seat and the flashboard, be provided with the valve shaft that the axis extends along flashboard direction of motion on the valve body, the valve shaft is located the one side of keeping away from sealed face of flashboard, synchronous rotation is provided with the eccentric wheel on the valve shaft, and this trip valve still includes and is used for driving valve shaft pivoted valve shaft driving motor, and the eccentric wheel has and changes to the closed position that the setting angle roof is pressed on the flashboard in order to make flashboard and disk seat sealed complex after the eccentric wheel still has the reversal and makes its open position with the flashboard disconnection.
The valve shafts are at least two in number and are arranged at two sides of the center of the flashboard at intervals in parallel, and at least one eccentric wheel is arranged on each valve shaft along the length direction of each valve shaft.
Each valve shaft is provided with a crank arm, and a connecting rod is arranged between the crank arms to ensure that each valve shaft synchronously rotates.
The sealing surface is a double-sealing structure, the double-sealing structure comprises a first sealing structure formed by sealing and matching a first hard alloy surface arranged on the flashboard and a second hard alloy surface arranged on the valve seat, the double-sealing structure also comprises a packing arranged on the valve seat and internally provided with a metal wire, the second hard alloy surface is an annular surface surrounding the packing, and the packing is used for forming the second sealing structure in sealing and matching with the first hard alloy surface.
The valve body is provided with a guide rail with the length extending along the moving direction of the flashboard, the flashboard is provided with a roller which is used for guiding and moving with the guide rail, and the guide rail is provided with a flat flashboard opening section and a guide rail sealing section which protrudes towards the sealing surface to forcedly enable the flashboard to be in sealing fit with the valve seat.
The flashboard comprises a flashboard body and a connecting plate arranged on the flashboard body, two rollers are arranged on the connecting plate along the moving direction of the flashboard at intervals, the number of the guide rail sealing sections is also two, the guide rail sealing sections are arranged in a collinear manner, and the guide rail also comprises an intermediate section positioned between the two guide rail sealing sections, and the intermediate section is collinear with the flashboard opening section.
The connecting plate is provided with a cleaning device for cleaning the particle sediment on the guide rail at the corresponding roller, and the valve body is provided with a discharge port for discharging the cleaned particle sediment.
The distance between the guide rail sealing section and the protruding guide rail is less than or equal to 5mm.
The shut-off valve further comprises a purging pipe which is arranged in parallel with the guide rail, and air outlets which face the guide rail are arranged on the purging pipe at intervals along the length direction of the purging pipe.
The invention has the beneficial effects that: when the eccentric wheel is positioned at the opening position, the flashboard can freely open the medium flow channel, and after the flashboard is closed, the valve shaft drives the motor to drive the valve shaft to rotate so that the eccentric wheel is rotated from the opening position to the closing position, and at the moment, the eccentric wheel is propped against one side surface of the flashboard, which is far away from the sealing surface, so that hard sealing is formed between the flashboard and the valve seat, and the sealing performance is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a shut-off valve in one embodiment of a catalytic cracker flue gas system of the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a schematic view of the assembled structure of the shutter and the guide rail;
FIG. 4 is a schematic structural view of a dual seal structure;
FIG. 5 is a schematic view of the eccentric in an open position;
FIG. 6 is a schematic view of the eccentric in the closed position;
FIG. 7 is a schematic view of the structure of the guide rail;
FIG. 8 is a schematic view of the structure of the cleaning device;
FIG. 9 is a schematic view of the structure of the purge tube;
FIG. 10 is a cross-sectional view at A-A of FIG. 2;
FIG. 11 is a schematic structural view of a shutter;
fig. 12 is a left side view of fig. 11.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
An embodiment of a catalytic cracking unit flue gas system of the invention: as shown in fig. 1-12, the flue gas desulfurization tower comprises a flue gas desulfurization tower, a flue gas desulfurization tower bypass pipeline and a shut-off valve arranged on the flue gas desulfurization tower bypass pipeline. The shut-off valve comprises a valve body 1, a valve seat 2 with a medium flow passage 7, a flashboard 3 for plugging and opening the medium flow passage 7 and a valve rod 4, and the shut-off valve further comprises a valve rod driving motor 5 for driving the valve rod 4 to drive the flashboard 3 to translate. The valve seat 3 and the flashboard 2 are provided with sealing surfaces in sealing fit, the flashboard 3 is provided with a flashboard sealing surface, and the valve seat 2 is provided with a valve seat sealing surface in sealing fit with the flashboard sealing surface. The valve body 1 is provided with a valve shaft 11 with an axis extending along the moving direction of the flashboard 3, the valve shaft 11 is synchronously rotated and provided with an eccentric wheel 12, and the valve shaft 11 is positioned on one side of the flashboard 3 far away from the sealing surface, namely, the valve shaft 11 is positioned on the opposite side of the flashboard sealing surface of the flashboard 3. The shut-off valve further comprises a valve shaft drive motor 6 for driving the valve shaft 11 to rotate, the eccentric 12 having a closed position in which the shutter 3 is turned to a set angle against the shutter 3 to sealingly engage the shutter 3 with the valve seat 2, as shown in fig. 6, and an open position in which the eccentric 12 is reversed to disengage it from the shutter 3, as shown in fig. 5. The flashboard 3 is provided with reinforcing ribs 23 on one side surface opposite to the flashboard sealing surface, the reinforcing ribs 23 are distributed in a net shape, the other ends of the reinforcing ribs are connected with a flashboard sealing plate 26, and the eccentric wheels 12 are propped against the flashboard sealing plate 26.
The flashboard 3 is a circular plate, the number of the valve shafts 11 is two, the two sides of the center line of the flashboard are arranged in parallel at intervals, and each valve shaft 11 is provided with two eccentric wheels 12 along the length direction. Each valve shaft 11 is provided with a crank arm 10, a connecting rod 9 is arranged between each crank arm 10 to ensure that each valve shaft 11 rotates synchronously, and the valve shaft driving motor 6 is in transmission connection with one valve shaft 11. When the valve rod driving motor 5 and the valve shaft driving motor 6 are controlled by a special controller to control the operation sequence, the valve rod driving motor 5 drives the flashboard 3 to be closed when the cut-off valve is closed, then the valve shaft driving motor 6 drives the valve shaft 11 to act so as to enable the eccentric wheel 12 to rotate to the closed position to push the flashboard 3 to enable the flashboard 3 to be in sealing fit with the valve seat 2, and when the cut-off valve is opened, the valve shaft driving motor 6 drives the valve shaft 11 to act so as to enable the eccentric wheel 12 to rotate to the open position from the closed position, and then the valve rod driving motor 5 drives the flashboard 3 to be opened.
The sealing surface between flashboard 3 and disk seat 2 adopts double seal structure, double seal structure includes by setting up the first seal structure that first carbide face 19 on flashboard 3 and the second carbide face 22 that sets up on disk seat 2 sealed the cooperation together and form, first carbide face 19 forms the flashboard sealing surface, double seal structure still includes the packing 20 that sets up the inside on disk seat 2 and is equipped with the wire, in order to increase the intensity of packing 20, second carbide face 22 is the annular face around packing 20, packing 20 is used for forming the second seal structure with first carbide face 19 sealed the cooperation, second carbide face 22 and packing 20 form the disk seat sealing surface with the contact surface of first carbide face 19 together. The packing 20 is fixed to the valve seat 2 by a packing ring 21. The double sealing structure has the advantages that after the packing 20 is completely worn, the sealing effect can be further achieved between the flashboard and the valve seat by virtue of the first hard alloy surface 19 and the second hard alloy surface 22, and the sealing life of the valve is ensured.
The valve body 1 is provided with guide rails 18 with the length extending along the moving direction of the flashboard 3, the flashboard 3 is provided with idler wheels 17 which are used for guiding and moving with the guide rails 18, and the number of the guide rails 18 is two and is respectively positioned at two opposite sides of the flashboard perpendicular to the moving direction of the flashboard. Each rail 18 has a flat shutter opening section 24 and a rail sealing section 25 projecting towards the sealing surface to force the shutter 3 into sealing engagement with the valve seat 2. The flashboard 3 comprises a flashboard body and a connecting plate 13 arranged on the flashboard body, two rollers 17 are arranged on the connecting plate 13 along the moving direction of the flashboard 3 at intervals, the number of the guide rail sealing sections 25 is also two, the guide rail 18 also comprises an intermediate section 27 positioned between the two guide rail sealing sections 25, and the intermediate section 27 is collinear with the flashboard opening section 24. The connecting plate 13 is provided with a cleaning device for cleaning the particle sediment on the guide rail at the corresponding roller 17, the cleaning device is a fluororubber dust removing scraping blade 14 arranged on the connecting plate 13 through a pressing plate, the valve body 1 is provided with a discharge opening 15 for discharging the cleaned particle sediment, and the discharge opening 15 is provided with a valve 16. The guide rail seal section 25 protrudes from the guide rail 18 by a distance of 3mm. The shut-off valve further comprises a purge pipe 27 arranged in parallel with the guide rail 18, and air outlets 28 facing the guide rail 18 are arranged on the purge pipe 27 at intervals along the length direction of the purge pipe, so that dust on the guide rail 18 can be blown off.
In other embodiments of a catalytic cracker flue gas system of the present invention, the number of valve shafts may be one or more than three; the number of the eccentric wheels on each valve shaft can be one or more than three; the valve shafts can be driven by respective valve shaft driving motors; the valve seat is not provided with packing, and is only provided with a second hard alloy surface; the valve seat is not provided with a second hard alloy surface and is only provided with a packing; the cleaning device can also be a cleaning brush; the number of the guide rails is one; the distance between the guide rail sealing section and the protruding guide rail is equal to 5mm; the guide rail can also be a straight guide rail; the number of the rollers can be one, and the guide rail sealing section is one at the moment; the purge tube may not be provided.
The cut-off valve for auxiliary sealing of the eccentric wheel is identical to the cut-off valve in each embodiment of the flue gas system of the catalytic cracking device, and is not repeated here.
Claims (8)
1. The utility model provides a trip valve of eccentric wheel auxiliary seal, includes the valve body, sets up the disk seat that has the medium runner in the valve body, be used for shutoff and open flashboard, valve rod, the drive valve rod of valve rod in order to drive the valve rod driving motor of flashboard translation, has sealed complex sealed face between disk seat and the flashboard, its characterized in that: the valve body is provided with a valve shaft with an axis extending along the moving direction of the flashboard, the valve shaft is positioned on one side of the flashboard far away from the sealing surface, the valve shaft synchronously rotates and is provided with an eccentric wheel, the cut-off valve also comprises a valve shaft driving motor for driving the valve shaft to rotate, the eccentric wheel is provided with a closing position for pushing the flashboard to a set angle after the flashboard is closed so as to enable the flashboard to be in sealing fit with the valve seat, and the eccentric wheel is also provided with an opening position for enabling the eccentric wheel to be separated from the flashboard after the eccentric wheel is reversed; the valve body is provided with a guide rail with the length extending along the moving direction of the flashboard, the flashboard is provided with a roller for guiding and moving with the guide rail, and the guide rail is provided with a flat flashboard opening section and a guide rail sealing section which protrudes towards the sealing surface to forcedly seal and match the flashboard with the valve seat; the distance between the guide rail sealing section and the protruding guide rail is less than or equal to 5mm.
2. The eccentric assisted seal shut-off valve of claim 1, wherein: the valve shafts are at least two in number and are arranged in parallel on two sides of the center line of the flashboard, and at least one eccentric wheel is arranged on each valve shaft along the length direction of each valve shaft.
3. The eccentric assisted seal shut-off valve of claim 2, wherein: each valve shaft is provided with a crank arm, a connecting rod is arranged between the crank arms to ensure that each valve shaft rotates synchronously, and a valve shaft driving motor is connected with one valve shaft in a transmission way.
4. The eccentric assisted seal shut-off valve of claim 1, wherein: the sealing surface is a double-sealing structure, the double-sealing structure comprises a first sealing structure formed by sealing and matching a first hard alloy surface arranged on the flashboard and a second hard alloy surface arranged on the valve seat, the double-sealing structure also comprises a packing arranged on the valve seat and internally provided with a metal wire, the second hard alloy surface is an annular surface surrounding the packing, and the packing is used for forming the second sealing structure in sealing and matching with the first hard alloy surface.
5. The eccentric assisted seal shut-off valve of claim 1, wherein: the flashboard comprises a flashboard body and a connecting plate arranged on the flashboard body, two rollers are arranged on the connecting plate along the moving direction of the flashboard at intervals, the number of the guide rail sealing sections is also two, the guide rail sealing sections are arranged in a collinear manner, and the guide rail also comprises an intermediate section positioned between the two guide rail sealing sections, and the intermediate section is collinear with the flashboard opening section.
6. The eccentric assisted seal shut-off valve of claim 5, wherein: the connecting plate is provided with a cleaning device for cleaning the particle sediment on the guide rail at the corresponding roller, and the valve body is provided with a discharge port for discharging the cleaned particle sediment.
7. The eccentric assisted seal shut-off valve of claim 1, wherein: the shut-off valve further comprises a purging pipe which is arranged in parallel with the guide rail, and air outlets which face the guide rail are arranged on the purging pipe at intervals along the length direction of the purging pipe.
8. The utility model provides a catalytic cracking device flue gas system, includes flue gas desulfurizing tower, flue gas desulfurizing tower bypass pipeline and sets up the trip valve on flue gas desulfurizing tower bypass pipeline, its characterized in that: the shut-off valve employs a shut-off valve for eccentric assisted sealing as claimed in any one of the preceding claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710992100.0A CN108869769B (en) | 2017-10-23 | 2017-10-23 | Cut-off valve for auxiliary sealing of eccentric wheel and flue gas system of catalytic cracking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710992100.0A CN108869769B (en) | 2017-10-23 | 2017-10-23 | Cut-off valve for auxiliary sealing of eccentric wheel and flue gas system of catalytic cracking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108869769A CN108869769A (en) | 2018-11-23 |
| CN108869769B true CN108869769B (en) | 2024-01-05 |
Family
ID=64325457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710992100.0A Active CN108869769B (en) | 2017-10-23 | 2017-10-23 | Cut-off valve for auxiliary sealing of eccentric wheel and flue gas system of catalytic cracking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108869769B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE467153C (en) * | 1926-06-05 | 1928-10-19 | Kurt Karnath Dipl Ing Dr | High pressure gate valve |
| GB329725A (en) * | 1929-03-04 | 1930-05-29 | William Ernest Cottrell | Improvements in sluice and like sliding valves |
| US4817915A (en) * | 1986-12-18 | 1989-04-04 | Cetec Ag | Slide valve |
| CN2373643Y (en) * | 1998-04-06 | 2000-04-12 | 上海市公用事业工程承包公司 | High-temperature resistant gas steel plate sluice valve |
| CN102168763A (en) * | 2011-05-18 | 2011-08-31 | 朱国辉 | Convex top type single gate valve |
| CN103867737A (en) * | 2014-03-17 | 2014-06-18 | 沈阳真空技术研究所 | Guide rail vacuum connection rod gate valve |
| CN203809712U (en) * | 2014-04-14 | 2014-09-03 | 湖北精盛机械设备制造有限公司 | Sealed type discharging device capable of automatically removing crystal materials |
| CN205446772U (en) * | 2016-03-21 | 2016-08-10 | 河南茂盛机械制造有限公司 | Airtight for gate cam closing device of granary |
| CN207278914U (en) * | 2017-10-23 | 2018-04-27 | 上海飞球科技（集团）有限公司 | The stop valve and cat-cracker flue gas system of eccentric wheel auxiliary seal |
-
2017
- 2017-10-23 CN CN201710992100.0A patent/CN108869769B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE467153C (en) * | 1926-06-05 | 1928-10-19 | Kurt Karnath Dipl Ing Dr | High pressure gate valve |
| GB329725A (en) * | 1929-03-04 | 1930-05-29 | William Ernest Cottrell | Improvements in sluice and like sliding valves |
| US4817915A (en) * | 1986-12-18 | 1989-04-04 | Cetec Ag | Slide valve |
| CN2373643Y (en) * | 1998-04-06 | 2000-04-12 | 上海市公用事业工程承包公司 | High-temperature resistant gas steel plate sluice valve |
| CN102168763A (en) * | 2011-05-18 | 2011-08-31 | 朱国辉 | Convex top type single gate valve |
| CN103867737A (en) * | 2014-03-17 | 2014-06-18 | 沈阳真空技术研究所 | Guide rail vacuum connection rod gate valve |
| CN203809712U (en) * | 2014-04-14 | 2014-09-03 | 湖北精盛机械设备制造有限公司 | Sealed type discharging device capable of automatically removing crystal materials |
| CN205446772U (en) * | 2016-03-21 | 2016-08-10 | 河南茂盛机械制造有限公司 | Airtight for gate cam closing device of granary |
| CN207278914U (en) * | 2017-10-23 | 2018-04-27 | 上海飞球科技（集团）有限公司 | The stop valve and cat-cracker flue gas system of eccentric wheel auxiliary seal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108869769A (en) | 2018-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105605238B (en) | Valve | |
| CN108869769B (en) | Cut-off valve for auxiliary sealing of eccentric wheel and flue gas system of catalytic cracking device | |
| CN201772093U (en) | Piston-propelled non-abrasion ball valve | |
| CN203687070U (en) | Chimney damper door | |
| CN211990099U (en) | Cleaner for oil exploitation pipeline | |
| CN219933097U (en) | Automatic clear ball valve | |
| CN205816345U (en) | A kind of petroleum pipeline of inner wall belt scraper | |
| CN201351740Y (en) | Anti-leak self-cleaning ball valve | |
| CN207278914U (en) | The stop valve and cat-cracker flue gas system of eccentric wheel auxiliary seal | |
| CN103982901B (en) | Flue damper door | |
| CN112756345A (en) | Robot for cleaning interior of oil pipe of kitchen smoke exhauster | |
| CN214466443U (en) | Thermal valve convenient to clearance calcification thing | |
| CN206206668U (en) | One kind rotates sealing type stop valve | |
| CN202100747U (en) | Multistage sealing valve seat of flat brake valve | |
| CN203836996U (en) | Chimney cover | |
| CN111664270B (en) | Ceramic sealing three-way valve | |
| CN208840138U (en) | Rotary soot blower | |
| CN206874855U (en) | A kind of two way seal knife gate valve | |
| CN213899974U (en) | Single-flow to air-flow conversion stop valve | |
| CN216347091U (en) | Thermal insulation equipment for smoke outlet of gas water heater | |
| CN207701828U (en) | A kind of triple valve | |
| CN204267743U (en) | Crossover valve and blast furnace gas feedway | |
| CN215763769U (en) | Sealing mechanism of pipeline valve for oil development | |
| CN201925503U (en) | Nitrogen-seal gas stop valve | |
| CN215597787U (en) | Smoke exhaust pipe for gas water heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |