CN102062226B - Multichannel sealing all-welded flat sluice valve - Google Patents
Multichannel sealing all-welded flat sluice valve Download PDFInfo
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- CN102062226B CN102062226B CN2011100293812A CN201110029381A CN102062226B CN 102062226 B CN102062226 B CN 102062226B CN 2011100293812 A CN2011100293812 A CN 2011100293812A CN 201110029381 A CN201110029381 A CN 201110029381A CN 102062226 B CN102062226 B CN 102062226B
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Abstract
The invention relates to a flat sluice valve, in particular to a multichannel sealing all-welded flat sluice valve. The multichannel sealing all-welded flat sluice valve comprises a valve body, a valve cover, a valve rod, a flashboard and a drive mechanism, wherein a sealing assembly is arranged between the valve rod and the valve cover; the valve body is provided with a medium inflow channel, a medium outflow channel, a connecting cavity and a discharge channel, wherein valve seats are arranged between the connecting cavity and the medium outflow channel and between the connecting cavity and the medium inflow channel; the valve cover and the valve body are welded and hermetically connected; each valve seat comprises a main valve seat and an auxiliary valve seat, wherein the main valve seat comprises a valve body sealing end and a flashboard sealing end, the auxiliary valve seat comprises an auxiliary valve seat flashboard sealing end and a brake press end positioned between the auxiliary valve seat flashboard sealing end and the valve body, and main and auxiliary valve seat sealing ends are arranged between the main valve seat and the auxiliary valve seat; and a press spring is arranged between the brake press end of the auxiliary valve seat and the valve body. By adopting the technical scheme, the invention provides the multichannel sealing all-welded flat sluice valve which has good fireproof and sealing properties.
Description
Technical field
The present invention relates to a kind of plate valve, particularly a kind of multiple-sealed full welding plate gate valve.
Background technique
Existing pipe-line is to be made up of valve body, valve seat, flashboard, valve gap, valve rod and drive unit with plate valve, thereby drives the open and-shut mode that moves up and down control valve of flashboard by rotatablely moving of valve rod.Be provided with the flow channel and the flow pass that supply working medium to flow in the valve body; Be provided with the connection chamber that to place flashboard between flow channel and the flow pass; Be provided with valve seat at flow channel and flow pass and valve body connection chamber place; Valve seat is to embed the soft sealing surface of synthetic plastic material composition and the axis overlaid of its axis and valve body inlet/outlet passage; Valve seat can move relative to valve body, and soft-hard sealing pair that the sealing of valve mainly relies on the medium working pressure to promote floating valve seat and flashboard formation soft material and the pairing of metal stiff dough realizes that said valve body connection chamber communicates with inlet passage always and is full of working medium with pressure under operating mode; Adopt flange gasket to be connected between valve body and pipeline, valve body and the valve gap, 0 shape rubber seal is all adopted in the sealing between the sealing between valve seat and the valve body, valve rod and the valve gap.
The deficiency that technique scheme exists is mainly reflected in the following aspects: when above-mentioned plate valve is used for the oil and gas pipes system; In case breaking out of fire; This product structure does not possess fire-proof function; Flange gasket and 0 shape rubber seal meeting scaling loss, the intensity of a fire can spread to valve outside and the whole pipeline of pipe downstream, brings serious safety problem for oil gas device systems and people's lives and properties.When this plate valve was used under ground piping, flange-pad pattern was all adopted in the sealing between valve body and the valve gap, between valve body two end part and the pipeline, when pad lost efficacy when producing dielectric leakage, was difficult to find timely processing, stayed potential safety hazard.Seal ring material on the valve seat adopts the plastics of organic synthesis usually, and soft-hard sealing pair of forming with flashboard very easily washes away the plastic seal ring that damages on the valve seat at the fluid of valve switch process high speed, thereby valve seal was lost efficacy, can't proper functioning.This type of valve is the single face sealing configuration, and this structure does not possess the function of online emptying valve body lumen working medium, can not satisfy following pair of demand of blocking-discharging of operating mode.
Summary of the invention
To the deficiency that existing technology exists, the invention provides the multiple-sealed full welding plate gate valve of a kind of fire prevention, good airproof performance.
For realizing above-mentioned purpose; The invention provides following technological scheme: a kind of multiple-sealed full welding plate gate valve; Include valve body, the valve gap that is connected with valve body, by the valve gap place be inserted into valve rod in the valve body, with the flashboard of valve rod interlock and the driving mechanism of actuate valve stem; Be provided with black box between valve rod and the valve gap; Valve body is provided with medium inlet passage, medium flow pass, connects medium inlet passage and the connection chamber of medium flow pass and the discharge passage that is connected with connection chamber; Flashboard extends in the connection chamber, and the joining place of connection chamber and medium flow pass and medium inlet passage is provided with flashboard and is the valve seat that is sealed and matched, and it is characterized in that: described valve gap is welded seal with valve body and is connected; The auxiliary valve seat that described valve seat includes main valve seat and seals with main valve seat; Main valve seat includes valve seal end and flashboard sealed end, auxiliary valve seat include auxiliary valve seat flashboard sealed end and and valve body between braking compress end, be provided with main and auxiliary valve base sealing end between main valve seat and the auxiliary valve seat; Described flashboard sealed end place is provided with the plastic seal ring with the flashboard sealing, and auxiliary valve seat flashboard sealed end place is provided with plastic seal ring and cemented carbide sealing block; Main valve seat is provided with the seal gease injection channel; Main and auxiliary valve base sealing end place between main valve seat and the auxiliary valve seat is provided with seal ring; The valve seal end place of main valve seat is provided with fire proof seal circle and O RunddichtringO; The braking of auxiliary valve seat compresses to be provided with between end and the valve body and compresses spring.
Adopt technique scheme; Initiatively valve seat and auxiliary valve seat are through being provided with valve seal end, flashboard sealed end, auxiliary valve seat flashboard sealed end above that, braking to compress and hold and main and auxiliary valve base sealing end; It is multiple-sealed to make valve body have; Get into for the valve body medium and one sealing pair of flow pass like the plastic seal ring at the flashboard sealed end place of main valve seat; The plastic seal ring at the auxiliary valve seat flashboard sealed end place of auxiliary valve seat is another road sealing pair of entering of valve body medium and flow pass, and the cemented carbide sealing block is another road sealing pair of entering of valve body medium and flow pass, and the sealing of valve body is improved; Prevent that effectively situation about revealing from appearring in valve body, and the setting of fire proof seal circle makes valve body have fire-proof function.
The present invention further is set to: the installation place that is positioned at main valve seat on the valve body is provided with the shoulder rank; Described main valve seat is a drum shape body; Its outer circumferential face is provided with the seal boss adaptive with auxiliary valve seat; The flashboard sealed end of main valve seat is the end of main valve seat towards connection chamber; Its valve seal end comprises the fitting part on a end that main valve seat is fitted towards valve body shoulder rank and with valve body shoulder rank and main valve seat outer circumferential face and valve body shoulder rank, and the O RunddichtringO is located at the end of main valve seat towards the shoulder rank, and the fire proof seal circle is located at the joint place that main valve seat periphery and valve body are takeed on rank; One end opening of described seal gease injection channel is opened in the end place of main valve seat towards connection chamber, and the other end opening is opened on the outer circumferential face of main valve seat; Described auxiliary valve seat is a ring bodies; Include body and be located at extension block and the mounting hole on the body; Extension block and body are vertical setting; The joint of body and extension block has two shoulder terraces and forms the shoulder rank, and the auxiliary shutter sealed end of auxiliary valve seat is the end of extension block towards connection chamber, and braking compresses end and is the other end of auxiliary valve seat body relative orientation connection chamber one end; The cemented carbide sealing block is located on the wall of auxiliary valve seat extension block and main valve seat applying; And the outer circumferential face of this wall and main valve seat is fitted, and the main and auxiliary valve base sealing end that helps between auxiliary valve seat and the main valve seat is the shoulder terrace of auxiliary valve seat body towards the main valve seat outer circumferential face, and the described spring that compresses is a butterfly spring.
Wherein, leave braked space between the sealing projection of the shoulder terrace of auxiliary valve seat extension block and main valve seat.
Adopt technique scheme, simple in structure, rationally easy to process, compress spring and select for use butterfly spring to be because the power that compresses of butterfly spring is big, it is more obvious to compress effect; The setting of braked space can be carried out the capable adjusting of little shift-in to the position of auxiliary valve seat between the shoulder terrace of auxiliary valve seat extension block and the sealing projection of main valve seat.
The present invention further is set to: be respectively equipped with welding groove on the medium inlet passage of valve body and the outer wall of medium flow pass.
Adopt technique scheme, the setting of welding groove to make being connected between valve body and the external component need not to adopt traditional flange-type to connect, directly with its through welding groove both weld can, can play the effect that reduces valve weight, raising sealability.
The present invention further is set to: the weld seam of valve body and valve gap weld is " U " shape.
Adopt technique scheme, be provided with like this and can reduce the bevel for welding sectional area significantly and fill out the amount of applying and raising welding efficiency with weld metal.
The present invention further is set to: the black box between valve gap and the valve rod includes fire proof seal circle and O type rubber seal.
Adopt technique scheme, the setting before fire proof seal circle and the O type rubber makes not only to have fire-proof function but also also has the double seal effect between valve rod and the valve gap, prevent when the valve body internal combustion, outside burning things which may cause a fire disaster is diffused to by the valve gap place.
Below in conjunction with accompanying drawing the present invention is further described.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the I portion enlarged view of Fig. 1;
Fig. 3 is the II portion enlarged view of Fig. 1;
Fig. 4 is the structural representation of auxiliary valve seat in the embodiment of the invention.
Embodiment
Like Fig. 1-a kind of multiple-sealed full welding plate gate valve shown in Figure 4; Include valve body 1, the valve gap 2 that is connected with valve body 1, by valve gap 2 places be inserted into valve rod 3 in the valve body 1, with the flashboard 4 of valve rod 3 interlocks and the driving mechanism 5 of actuate valve stem 3, driving mechanism 5 can be handwheel or motor; Be provided with black box 6 between valve rod 3 and the valve gap 2; The black box 6 at this place is for having fire proof seal circle 61 and O type rubber seal 62; The setting of fire proof seal circle 61 and O type rubber ring 62 makes not only to have fire-proof function but also also has the double seal effect between valve rod 3 and the valve gap 2; Prevent burning things which may cause a fire disaster when valve body 1 internal combustion, outside burning things which may cause a fire disaster is diffused to by valve gap 2 places; Valve body 1 is provided with medium inlet passage 11, medium flow pass 11, connects medium inlet passage 11 and the connection chamber 13 of medium flow pass 12 and the discharge passage 14 that is connected with connection chamber 13; Flashboard 4 extends in the connection chamber 13; The joining place of connection chamber 13 and medium flow pass 12 and medium inlet passage 11 is provided with flashboard 4 and is the valve seat 7 that is sealed and matched; In use, when the medium inlet passage 11 of valve body 1 and medium flow pass 12 need conducting, then through driving mechanism 5 actuate valve stem 3; Valve rod 3 makes flashboard 4 withdraw from connection chamber 13, makes connection chamber 13 and medium inlet passage 11 and 12 conductings of medium flow pass; Otherwise in the time of need closing, then through driving mechanism 5 actuate valve stem 3, valve rod 3 enters in the connection chamber 13 flashboard 4 connection chamber 13 is sealed, and medium inlet passage 11 can't conducting with medium flow pass 12.In embodiments of the present invention; Valve gap 2 is welded seal with valve body 1 and is connected; Be respectively equipped with welding groove 14 on the medium inlet passage 11 of valve body 1 and the outer wall of medium flow pass 12, the sealability that makes valve body 1 on the one hand be set like this improve, then replaced traditional flange-type to connect on the other hand; The weight of valve body 1 is lightened, thereby made things convenient for transportation; And valve body 1 is " U " shape with the weld seam of valve gap 2 welds, is provided with like this can reduce the bevel for welding sectional area significantly and fill out the amount of applying and raising welding efficiency with weld metal; The auxiliary valve seat 9 that valve seat 7 in the embodiment of the invention includes main valve seat 8 and seals with main valve seat 8; Main valve seat 8 includes valve seal end 81 and flashboard sealed end 82; Auxiliary valve seat 9 includes auxiliary valve seat flashboard sealed end 91 and compresses and hold 92 with braking between the valve body 1, is provided with main and auxiliary valve base sealing end 83 between main valve seat 8 and the auxiliary valve seat 9; Flashboard sealed end 82 places are provided with the plastic seal ring 821 with flashboard 4 sealings, and auxiliary valve seat flashboard sealed end 91 places are provided with plastic seal ring 911 and cemented carbide sealing block 912; Main valve seat 8 is provided with seal gease injection channel 84; Main and auxiliary valve base sealing end 83 places between main valve seat 8 and the auxiliary valve seat 9 are provided with seal ring 831; Valve seal end 81 places of main valve seat 8 are provided with fire proof seal circle 811 and O RunddichtringO 812; The braking of auxiliary valve seat 9 compresses to be provided with between end 92 and the valve body 1 and compresses spring 93, and this compresses spring 93 and is butterfly spring, certainly; Also can be common spring; Also be feasible, just the dynamics that compresses of butterfly spring is bigger, and its conflict effect is more obvious; Can make the sealing between auxiliary valve seat 9 and the flashboard 4 more tight, thus the present invention preferred the former.In the such scheme; Initiatively valve seat 8 and auxiliary valve seat 9 compress end 92 and main and auxiliary help valve base sealing end 83 through valve seal end 81, flashboard sealed end 82, auxiliary valve seat flashboard sealed end 91, braking are set above that; It is multiple-sealed to make that valve body 1 has; The sealing of valve body 1 is improved, prevent that effectively situation about revealing from appearring in valve body 1, and the setting of fire proof seal circle 811 makes valve body 1 have fire-proof function.
In embodiments of the present invention; The installation place that is positioned at main valve seat 8 on the valve body 1 is provided with shoulder rank 15; Main valve seat 8 is a drum shape body; Its outer circumferential face is provided with the seal boss 85 adaptive with auxiliary valve seat 9, and the flashboard sealed end 82 of main valve seat 8 is the end of main valve seat 8 towards connection chamber 13, and its valve seal end 81 comprises the end that main valve seat 8 is fitted towards valve body 1 shoulder rank 15 and with valve body 1 shoulder rank 15 and the fitting part on main valve seat 8 outer circumferential faces and valve body 1 shoulder rank; O RunddichtringO 812 is located at the end of main valve seat 8 towards shoulder rank 15; Fire proof seal circle 811 is located at the joint place on main valve seat 8 peripheries and valve body 1 shoulder rank 15, and an end opening 841 of seal gease injection channel 84 is opened in the end place of main valve seat 8 towards connection chamber 13, and the other end opening 842 is opened on the outer circumferential face of main valve seat 8.
In embodiments of the present invention; Auxiliary valve seat 9 is a ring bodies; Include body 95 and be located at extension block 96 and the mounting hole 97 on the body 95; Extension block 96 is vertical setting with body 95, and body 95 has two shoulder terraces formation shoulder rank 98 with the joint of extension block 96, and the auxiliary shutter sealed end 91 of auxiliary valve seat 9 is the end of extension block 96 towards connection chamber 13; Braking compresses end 92 and is the other end of auxiliary valve seat 9 bodies 95 relative orientation connection chambers 13 1 ends; Cemented carbide sealing block 912 is located on the wall of auxiliary valve seat 9 extension blocks 96 and main valve seat 8 applyings, and the applying of the outer circumferential face of this wall and main valve seat 8, and the main and auxiliary valve base sealing end 83 between auxiliary valve seat 9 and the main valve seat 8 is the shoulder terraces of auxiliary valve seat 9 bodies 95 towards main valve seat 8 outer circumferential faces.Leave braked space 962 between the shoulder terrace 961 of auxiliary valve seat 9 extension blocks 96 and the sealing projection 85 of main valve seat 8, the setting of this place's braked space 962 can be carried out the capable adjusting of little shift-in to the position of auxiliary valve seat 9.
Formed multiple-sealed pair is specific as follows among the present invention: the plastic seal ring 821 at flashboard sealed end 82 places of main valve seat 8 is one sealing pair of entering of valve body 1 medium and flow pass; The plastic seal ring 911 at auxiliary valve seat flashboard sealed end 91 places of auxiliary valve seat 9 is the second road sealing pair of entering of valve body 1 medium and flow pass, and cemented carbide sealing block 912 is that the three seals of entering of valve body 1 medium and flow pass is secondary; In the long-term work of this valve; The high-velocity fluid that occurs in because of switch when plastic seal ring on the main valve seat 8 821 frequently washes away and damages when causing one sealing pair of the mat woven of fine bamboo strips to lose efficacy; Plastic seal ring 911 on the auxiliary valve seat 9 can be born whole seal actions automatically with the second road sealing pair that flashboard 4 is formed, and guarantees the valve proper functioning; When the plastic seal ring on the auxiliary valve seat 9 911 lost efficacy through the long-term work wearing and tearing, the cemented carbide sealing block 912 on the auxiliary valve seat 9 can be born whole seal actions automatically with the three seals pair that flashboard 4 is formed, and continues to keep the valve proper functioning; When the three seals pair of forming with flashboard 4 respectively when the plastic seal ring 911 of the plastic seal ring 821 of main valve seat 8, auxiliary valve seat 9 and cemented carbide sealing block 912 all lost efficacy; Through main valve seat 8 being injected the seal gease sealability at the secondary position of maintaining valve door sealing once more; Form the sealing of the mat woven of fine bamboo strips four roads; Can guarantee that still product continues proper functioning, multiple-sealed system very the earth has prolonged the working life of valve.
Valve is when valve body 1 connection chamber 13 is through discharge passage 14 discharging working mediums in the complete shut-down position; Because being the elastic force that compresses spring 93 that relies on its auxiliary valve seat 9 brakings to compress end 92 places, the plastic seal ring 911 of auxiliary valve seat 9 realizes sealing; Make valve body 1 not influenced by discharging; Still can keep tight seal, have two performance requirements that block, discharge.
Claims (6)
1. multiple-sealed full welding plate gate valve; Include valve body, the valve gap that is connected with valve body, by the valve gap place be inserted into valve rod in the valve body, with the flashboard of valve rod interlock and the driving mechanism of actuate valve stem; Be provided with black box between valve rod and the valve gap; Valve body is provided with medium inlet passage, medium flow pass, connects medium inlet passage and the connection chamber of medium flow pass and the discharge passage that is connected with connection chamber; Flashboard extends in the connection chamber, and the joining place of connection chamber and medium flow pass and medium inlet passage is provided with flashboard and is the valve seat that is sealed and matched, and it is characterized in that: described valve gap is welded seal with valve body and is connected; The auxiliary valve seat that described valve seat includes main valve seat and seals with main valve seat; Main valve seat includes valve seal end and flashboard sealed end, auxiliary valve seat include auxiliary valve seat flashboard sealed end and and valve body between braking compress end, be provided with main and auxiliary valve base sealing end between main valve seat and the auxiliary valve seat; Described flashboard sealed end place is provided with the plastic seal ring with the flashboard sealing, and auxiliary valve seat flashboard sealed end place is provided with plastic seal ring and cemented carbide sealing block; Main valve seat is provided with the seal gease injection channel; Main and auxiliary valve base sealing end place between main valve seat and the auxiliary valve seat is provided with seal ring; The valve seal end place of main valve seat is provided with fire proof seal circle and O RunddichtringO; The braking of auxiliary valve seat compresses to be provided with between end and the valve body and compresses spring.
2. multiple-sealed full welding plate gate valve according to claim 1; It is characterized in that: the installation place that is positioned at main valve seat on the described valve body is provided with the shoulder rank; Described main valve seat is a drum shape body; Its outer circumferential face is provided with the seal boss adaptive with auxiliary valve seat, and the flashboard sealed end of main valve seat is the end of main valve seat towards connection chamber, and its valve seal end comprises that a end that main valve seat is fitted towards valve body shoulder rank and with valve body shoulder rank and main valve seat outer circumferential face and valve body take on the fitting part on rank; The O RunddichtringO is located at the end of main valve seat towards the shoulder rank; The fire proof seal circle is located at the joint place on main valve seat periphery and valve body shoulder rank, and an end opening of described seal gease injection channel is opened in the end place of main valve seat towards connection chamber, and the other end opening is opened on the outer circumferential face of main valve seat; Described auxiliary valve seat is a ring bodies; Include body and be located at extension block and the mounting hole on the body; Extension block and body are vertical setting; The joint of body and extension block has two shoulder terraces and forms the shoulder rank, and the auxiliary valve seat flashboard sealed end of auxiliary valve seat is the end of extension block towards connection chamber, and braking compresses end and is the other end of auxiliary valve seat body relative orientation connection chamber one end; The cemented carbide sealing block is located on the wall of auxiliary valve seat extension block and main valve seat applying; And the outer circumferential face of this wall and main valve seat is fitted, and the main and auxiliary valve base sealing end that helps between auxiliary valve seat and the main valve seat is the shoulder terrace of auxiliary valve seat body towards the main valve seat outer circumferential face, and the described spring that compresses is a butterfly spring.
3. multiple-sealed full welding plate gate valve according to claim 1 and 2 is characterized in that: be respectively equipped with welding groove on the medium inlet passage of said valve body and the outer wall of medium flow pass.
4. multiple-sealed full welding plate gate valve according to claim 1 and 2, it is characterized in that: the weld seam of said valve body and valve gap weld is " U " shape.
5. multiple-sealed full welding plate gate valve according to claim 3, it is characterized in that: the weld seam of said valve body and valve gap weld is " U " shape.
6. multiple-sealed full welding plate gate valve according to claim 1 and 2 is characterized in that: the black box between said valve gap and the valve rod includes fire proof seal circle and O type rubber seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100293812A CN102062226B (en) | 2011-01-27 | 2011-01-27 | Multichannel sealing all-welded flat sluice valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100293812A CN102062226B (en) | 2011-01-27 | 2011-01-27 | Multichannel sealing all-welded flat sluice valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102062226A CN102062226A (en) | 2011-05-18 |
| CN102062226B true CN102062226B (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100293812A Active CN102062226B (en) | 2011-01-27 | 2011-01-27 | Multichannel sealing all-welded flat sluice valve |
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| CN (1) | CN102062226B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758925A (en) * | 2012-07-18 | 2012-10-31 | 嘉士凯（苏州）阀门配件有限公司 | High pressure and low pressure combination gate valve |
| CN109854767A (en) * | 2019-02-19 | 2019-06-07 | 成都乘风阀门有限责任公司 | Compound seal valve seat construction flat gate valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB995457A (en) * | 1961-09-26 | 1965-06-16 | Mcevoy Co | Valves with enhanced pressure actuated seals |
| US5494256A (en) * | 1983-11-14 | 1996-02-27 | Beson; John | Dual seal ball valve |
| US5624101A (en) * | 1983-11-14 | 1997-04-29 | Beson; John | Dual seal valve |
| RU2206007C1 (en) * | 2002-06-05 | 2003-06-10 | Майданов Евгений Анатольевич | Gate |
| CN201133483Y (en) * | 2007-11-30 | 2008-10-15 | 河南开封高压阀门有限公司 | Combined shutter heavy caliber hard seal flat gate valve |
| CN201715010U (en) * | 2010-02-20 | 2011-01-19 | 成都航利阀门成套设备有限公司 | Flat gate valve with anti-lock structure |
| CN202001643U (en) * | 2011-01-27 | 2011-10-05 | 保一集团有限公司 | Multi-sealed all-welded flat plate gate valve |
-
2011
- 2011-01-27 CN CN2011100293812A patent/CN102062226B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB995457A (en) * | 1961-09-26 | 1965-06-16 | Mcevoy Co | Valves with enhanced pressure actuated seals |
| US5494256A (en) * | 1983-11-14 | 1996-02-27 | Beson; John | Dual seal ball valve |
| US5624101A (en) * | 1983-11-14 | 1997-04-29 | Beson; John | Dual seal valve |
| RU2206007C1 (en) * | 2002-06-05 | 2003-06-10 | Майданов Евгений Анатольевич | Gate |
| CN201133483Y (en) * | 2007-11-30 | 2008-10-15 | 河南开封高压阀门有限公司 | Combined shutter heavy caliber hard seal flat gate valve |
| CN201715010U (en) * | 2010-02-20 | 2011-01-19 | 成都航利阀门成套设备有限公司 | Flat gate valve with anti-lock structure |
| CN202001643U (en) * | 2011-01-27 | 2011-10-05 | 保一集团有限公司 | Multi-sealed all-welded flat plate gate valve |
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| CN102062226A (en) | 2011-05-18 |
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Denomination of invention: Multichannel sealing all-welded flat sluice valve Effective date of registration: 20171213 Granted publication date: 20120822 Pledgee: Zhejiang bank Wenzhou Limited by Share Ltd Yongjia branch Pledgor: Baoyi Group Co., Ltd. Registration number: 2017330000253 |