CN111594629A - Double-cutter slurry gate valve for shield machine - Google Patents
Double-cutter slurry gate valve for shield machine Download PDFInfo
- Publication number
- CN111594629A CN111594629A CN202010578114.XA CN202010578114A CN111594629A CN 111594629 A CN111594629 A CN 111594629A CN 202010578114 A CN202010578114 A CN 202010578114A CN 111594629 A CN111594629 A CN 111594629A
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- valve body
- valve
- flashboard
- double
- damper
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- Pending
Links
- 239000002002 slurry Substances 0.000 title abstract description 18
- 230000003139 buffering effect Effects 0.000 claims abstract description 13
- 238000011010 flushing procedure Methods 0.000 claims abstract description 11
- 238000012423 maintenance Methods 0.000 claims abstract description 9
- 239000010865 sewage Substances 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 3
- 239000007924 injection Substances 0.000 claims abstract description 3
- 239000000945 filler Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 10
- 239000004519 grease Substances 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 238000013016 damping Methods 0.000 claims description 6
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 claims 5
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000005461 lubrication Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- F16K3/029—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 two or more gates
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- B08B1/165—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/041—Cleaning travelling work
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
-
- 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
Abstract
The invention discloses a double-cutter mud gate valve for a shield machine, which mainly comprises a left valve body, a middle body, a right valve body, a main seal, a first gate plate, a second gate plate, a hydraulic driving device, an oil injection device, a buffering device, a first signal feedback device, a second signal feedback device, a first flushing device, a second flushing device, a sewage discharge device, an online maintenance filling system and the like. The slurry shield solves the problems of severe working conditions in the slurry shield field, the complex factors of blockage, slurry leakage, abrasion impact, large torque and the like, ensures smooth operation and free cut-off of a large circulation system, and overturns the traditional single-gate slurry gate valve.
Description
Technical Field
The invention relates to pipeline medium truncation, in particular to the field of slurry shield, and specifically relates to a double-cutter slurry gate valve for a shield machine.
Background
The slurry balance shield machine is characterized in that slurry or slurry is conveyed to a face at the front end of a cutter head by pressurizing a ground slurry conveying pump to stabilize an excavation face, and meanwhile, after the excavation face is excavated, gravels, muck and slurry which are cut are conveyed to the ground in a fluid form by a slurry discharging pump to be subjected to slurry-water separation treatment, so that sequential circulating operation construction is performed through a slurry circulation system. In order to ensure smooth operation and free cutoff of the large circulation system, a cutoff valve is required in a pipeline system in the process of conveying muddy water. Chinese patent application No.: CN201220229348.4, a perforated valve plate type pneumatic wear-resistant double gate valve, which solves the problems of leakage and incapability of normal and normal pressure normal closing of a conveying system caused by material blocking, easy blocking of a valve cavity and unbalanced valve plate of the double gate valve, and comprises a cylinder and a valve body fixed with the cylinder through a connecting neck, it is characterized in that the valve body is provided with two oval flanges which are parallel to each other, the two oval flanges are respectively provided with a side valve body, a piston rod of the air cylinder penetrates through the valve body to be connected with a valve plate control rod, the valve plate control rod is provided with an axial body along the direction of the material inlet and the material outlet, one side of the axial body is provided with a valve plate, the other side of the axial body is provided with an open-pore valve plate which is a disc-shaped hollow part, the device faces complex factors such as blockage, slurry leakage, abrasion impact and large torque under the severe working condition, cannot adapt to the working condition, and contains gravels in fluid, so that the perforated gate plate is easily blocked, and the perforated gate plate cannot be automatically washed.
Disclosure of Invention
The invention aims to provide a double-blade mud gate valve for a shield machine, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the double-cutter slurry gate valve for the shield machine comprises a valve body, a gate plate, a valve rod and a hydraulic driving device, wherein the valve rod comprises a left valve body, a right valve body and a middle body, the left valve body, the right valve body and the middle body are connected through bolts, the hydraulic driving device is connected with one end of the valve rod, the other end of the valve rod is connected with the gate plate, a sealing groove is formed in the joint of the middle body, the left valve body and the right valve body, the sealing groove is of a double-groove structure, and a main seal is arranged in;
the damper comprises a first damper and a second damper which are arranged in parallel, the bottom ends of the first damper and the second damper are in V-shaped contact with the main seal, a damping device is arranged at the contact position of the upper ends of the first damper and the second damper and the middle body, the damping device comprises a buffering column, a buffering body and a spring, the spring is arranged in a cavity of the buffering body, one end of the spring is in contact with the middle body, and the other end of the spring is connected with the buffering column;
the device comprises a middle body, a left valve body, a right valve body, a first flashboard and a second flashboard, wherein an online maintenance filler device is arranged at the upper contact position of the middle body, the left valve body and the right valve body with the first flashboard and the second flashboard, the first flashboard and the second flashboard are clamped by the online maintenance filler device, the two flashboards are arranged on the valve bodies opposite to the flashboards, the device comprises soft clay-like fillers, C-shaped rubber strips and mud scraping plates, the C-shaped rubber strips are arranged between the mud scraping plates, and the soft clay-like fillers.
Preferably, the middle body is provided with a first flushing device, a second flushing device and a sewage discharging device.
Preferably, a protective cover is arranged between the hydraulic driving device and the valve body, a limiting hole is formed in the protective cover, and a limiting bolt is arranged in the limiting hole.
Preferably, a grease lubrication groove is arranged between the two online maintenance filling devices on the valve body on the opposite surface of the flashboard, and the grease lubrication groove is connected with an external oil injection device.
Preferably, the upper end of the protective cover is connected with the hydraulic driving device through a screw, and the lower end of the protective cover is connected with the valve body through a bolt.
Preferably, the upper part and the lower part of the hydraulic driving device are provided with a first opening and closing signal feedback and a second signal feedback.
Compared with the prior art, the invention has the beneficial effects that: after the structure is adopted, the characteristics of no slurry leakage, good sealing, scouring resistance, capability of maintaining the filler on line, light torque and the like of the gate valve can be effectively ensured.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is an enlarged view of the main seal and V-shaped opening at A in FIG. 1
FIG. 3 is an enlarged view of the on-line maintenance assembly of the packing device at B in FIG. 1
FIG. 4 is an enlarged view of the buffer device integration at C of FIG. 1
In the figure: 1. a left valve body; 2. a first gate plate; 3. a middle body; 4. a right valve body; 5. a bolt; 6. a second gate plate; 7. a limiting bolt; 8. a protective cover; 9. a cylindrical positioning pin; 10. a hydraulic drive device; 11. feeding back a signal I; 12. feeding back a signal II; 13. a sewage draining device; 14. flushing one; 15. flushing II; 16. an oiling device; 17. primary sealing; 18. a grease lubrication groove; 19. c-shaped rubber strips; 20. a soft, mud-like filler; 21. a mud scraper; 22. a buffer column; 23. a buffer body; 24 spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and fig. 2, the present invention provides a technical solution: the double-cutter mud gate valve for the shield machine comprises a valve body, a gate plate, a valve rod and a hydraulic driving device 10, wherein the valve rod comprises a left valve body 1, a right valve body 4 and a middle body 3, the left valve body 1, the right valve body 4 and the middle body 3 are connected through bolts 5, the hydraulic driving device 10 is connected with one end of the valve rod, the other end of the valve rod is connected with the gate plate, the gate plate comprises a first gate plate 2 and a second gate plate 6 which are arranged in parallel, a sealing groove is formed at the joint of the middle body 3 and the left valve body 1 and the right valve body 4, the sealing groove is of a double-groove structure and internally provided with a main seal 17, the double grooves are designed on the sealing groove, the main seal 17 cannot be flushed out by a medium, the main seal 17 cannot be pulled out and loosened due to friction of the first gate plate 2 and the second gate plate 6, meanwhile, the main seal; the contact positions of the bottom ends of the first gate plate 2 and the second gate plate 6 and the main seal 17 are V-shaped, and form V-shaped matching surfaces with the left valve body 1, the middle body 3 and the right valve body 4, so that automatic alignment after parallel motion of the first gate plate 2 and the second gate plate 6 is further ensured.
See fig. 4, the contact department of the upper ends of the first 2 and the second 6 flashboards and the middle body 3 is provided with a damping device, the damping device comprises a buffering column 22, a buffering body 23 and a spring 24, the cavity of the buffering body 23 is internally provided with the spring 24, one end of the spring 24 is in contact with the middle body 3, the other end of the spring is connected with the buffering column 22, and the device ensures that the impact on the main seal 17 is effectively reduced when the first 2 and the second 6 flashboards are closed.
Referring to fig. 3, the contact parts of the middle body 3, the left valve body 1 and the right valve body 4 with the upper parts of the first gate plate 2 and the second gate plate 6 are provided with online maintenance filling devices which clamp the first gate plate 2 and the second gate plate 6, the device is provided with two valve bodies on the opposite surfaces of the flashboard, the device comprises a soft mud-shaped filler 20, a C-shaped rubber strip (19) and a mud scraper 21, the mud scraper 21 between be equipped with C type rubber strip 19, be equipped with soft mud-like filler 20 between C type rubber strip 19 and the valve body, soft mud-like filler 20 accessible outside preformed hole pours into C type rubber strip 19 lower part into, compensate C type rubber strip 19's compressive capacity, further block the outer hourglass of medium, two mud scraper 21 centre gripping flashboards one 2, flashboard two 6, further scrape out adnexed mud, effectively guarantee C type rubber strip 19's life, simultaneously to flashboard one 2, the effectual guide effect of flashboard two 6.
As shown in figure 1, the middle body 3 is provided with a first flushing device 14, a second flushing device 15 and a sewage discharge device 13, and mud in the cavity of the middle body 3 is flushed through the matched circulation of high-pressure flushing and sewage discharge, so that blockage is effectively prevented.
See fig. 1 and be equipped with safety cover 8 between hydraulic drive device 13 and the valve body, 8 upper ends of safety cover pass through screw 9 with hydraulic drive device 13 and are connected, and the lower extreme passes through bolted connection with the valve body, is equipped with spacing hole on the safety cover 8, spacing downthehole spacing bolt 7 that is equipped with, opens the back when flashboard one 2, flashboard two 6, and the collision in the tunnel is more, for further protection flashboard one 2, flashboard two 6, is provided with safety cover 8 externally. The safety cover 8 on set up the spacing hole in four places, the spacing hole of safety cover 8 cooperates with spacing bolt 7 to guarantee that flashboard one 2, flashboard two 6 open and close the back fixed flashboard that targets in place, prevent the flashboard displacement.
Referring to fig. 1, the upper part and the lower part of a hydraulic driving device 10 are provided with a first opening and closing signal feedback 11 and a second signal feedback 12, and intelligent automation can be realized through signal transmission.
Referring to fig. 1 and 3, a grease lubrication groove 18 is arranged between the on-line maintenance filling devices; the grease lubricating groove 18 is directly connected with the grease injecting device 16, so that the first gate plate 2 and the second gate plate 6 are further ensured to be in a grease lubricating environment, friction is further reduced, and torque is greatly reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A double knives mud gate valve for shield constructs machine, including valve body, flashboard, valve rod and hydraulic drive device (10), the valve rod include left valve body (1), right valve body (4) and well body (3), left valve body (1), right valve body (4) and well body (3) are connected through bolt (5), hydraulic drive device (10) are connected with valve rod one end, and the flashboard, characterized by are connected to the valve rod other end: a sealing groove is arranged at the joint of the middle body (3) and the left valve body (1) and the right valve body (4), the sealing groove is of a double-groove structure, and a main seal (17) is arranged inside the sealing groove;
the damper comprises a first damper (2) and a second damper (6) which are arranged in parallel, the contact part of the bottom ends of the first damper (2) and the second damper (6) and a main seal (17) is V-shaped, the contact part of the upper ends of the first damper (2) and the second damper (6) and the middle body (3) is provided with a damping device, the damping device comprises a buffering column (22), a buffering body (23) and a spring (24), a cavity of the buffering body (23) is internally provided with the spring (24), one end of the spring (24) is in contact with the middle body (3), and the other end of the spring is connected with the buffering column (22);
well body (3), left valve body (1) and right valve body (4) are equipped with on-line maintenance filler device with the upper portion contact department of flashboard (2) and flashboard two (6), maintain filler device centre gripping flashboard (2) and flashboard two (6) on line, the device is equipped with two on the valve body of flashboard opposite face, the device includes soft mud-like filler (20), C type rubber strip (19) and mud scraper (21), mud scraper (21) between be equipped with C type rubber strip (19), be equipped with soft mud-like filler (20) between C type rubber strip (19) and the valve body.
2. The double-blade mud gate valve for a shield tunneling machine of claim 1, wherein: the middle body (3) is provided with a first flushing device (14), a second flushing device (15) and a sewage discharging device (13).
3. The double-blade mud gate valve for a shield tunneling machine of claim 1, wherein: a protective cover (8) is arranged between the hydraulic driving device (13) and the valve body, a limiting hole is formed in the protective cover, and a limiting bolt (7) is arranged in the limiting hole.
4. The double-blade mud gate valve for a shield tunneling machine of claim 1, wherein: a grease lubricating groove (18) is formed between the two online maintenance filling devices on the valve body on the opposite surface of the flashboard, and the grease lubricating groove (18) is connected with an external oil injection device (16).
5. The double-blade mud gate valve for a shield tunneling machine of claim 3, wherein: the upper end of the protective cover (8) is connected with the hydraulic driving device (13) through a screw (9), and the lower end of the protective cover is connected with the valve body through a bolt.
6. The double-blade mud gate valve for a shield tunneling machine of claim 3, wherein: the upper part and the lower part of the hydraulic driving device (13) are provided with a first opening and closing signal feedback (11) and a second signal feedback (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010578114.XA CN111594629A (en) | 2020-06-23 | 2020-06-23 | Double-cutter slurry gate valve for shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010578114.XA CN111594629A (en) | 2020-06-23 | 2020-06-23 | Double-cutter slurry gate valve for shield machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111594629A true CN111594629A (en) | 2020-08-28 |
Family
ID=72184896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010578114.XA Pending CN111594629A (en) | 2020-06-23 | 2020-06-23 | Double-cutter slurry gate valve for shield machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111594629A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH094732A (en) * | 1995-06-20 | 1997-01-07 | Kubota Corp | High temperature gate valve |
| US20010047835A1 (en) * | 2000-03-06 | 2001-12-06 | Peter Fagerstrom | Valve assembly (hygienic sealing plate) |
| CN101201118A (en) * | 2007-12-21 | 2008-06-18 | 鞍山市浆液阀门制造有限公司 | Knife-shaped gate valve for slurry |
| CN201401520Y (en) * | 2009-03-16 | 2010-02-10 | 美国钻采系统(南京)有限公司 | Gate valve with self-sealing and buffering functions |
| CN203627863U (en) * | 2013-08-29 | 2014-06-04 | 昆山工研院新型平板显示技术中心有限公司 | Valve plate of gate valve |
| CN207539355U (en) * | 2017-08-04 | 2018-06-26 | 立信阀门集团有限公司 | The wear-resisting Parallel Slide Valves of lining rubber tape scraper |
| CN109812589A (en) * | 2019-03-24 | 2019-05-28 | 百强阀门集团有限公司 | A kind of high guiding performance Wedge Gate Valves that can reduce sealing surface wear |
| CN210661423U (en) * | 2019-08-08 | 2020-06-02 | 立信阀门集团有限公司 | Double-gate mud valve special for changing cutter of shield machine |
-
2020
- 2020-06-23 CN CN202010578114.XA patent/CN111594629A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH094732A (en) * | 1995-06-20 | 1997-01-07 | Kubota Corp | High temperature gate valve |
| US20010047835A1 (en) * | 2000-03-06 | 2001-12-06 | Peter Fagerstrom | Valve assembly (hygienic sealing plate) |
| CN101201118A (en) * | 2007-12-21 | 2008-06-18 | 鞍山市浆液阀门制造有限公司 | Knife-shaped gate valve for slurry |
| CN201401520Y (en) * | 2009-03-16 | 2010-02-10 | 美国钻采系统(南京)有限公司 | Gate valve with self-sealing and buffering functions |
| CN203627863U (en) * | 2013-08-29 | 2014-06-04 | 昆山工研院新型平板显示技术中心有限公司 | Valve plate of gate valve |
| CN207539355U (en) * | 2017-08-04 | 2018-06-26 | 立信阀门集团有限公司 | The wear-resisting Parallel Slide Valves of lining rubber tape scraper |
| CN109812589A (en) * | 2019-03-24 | 2019-05-28 | 百强阀门集团有限公司 | A kind of high guiding performance Wedge Gate Valves that can reduce sealing surface wear |
| CN210661423U (en) * | 2019-08-08 | 2020-06-02 | 立信阀门集团有限公司 | Double-gate mud valve special for changing cutter of shield machine |
Non-Patent Citations (1)
| Title |
|---|
| 《化工设备设计基础》编写组: "《化工设备设计基础》", 31 May 1987, 上海科学技术出版社 * |
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Application publication date: 20200828 |