CN106678400A - Fireproof check valve - Google Patents
Fireproof check valve Download PDFInfo
- Publication number
- CN106678400A CN106678400A CN201710147354.2A CN201710147354A CN106678400A CN 106678400 A CN106678400 A CN 106678400A CN 201710147354 A CN201710147354 A CN 201710147354A CN 106678400 A CN106678400 A CN 106678400A
- Authority
- CN
- China
- Prior art keywords
- plectrum
- valve
- connecting rod
- valve body
- fire
- 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.)
- Granted
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
- F16K15/033—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member spring-loaded
Abstract
The invention relates to a fireproof check valve and solves the problem of loss of smoke isolation effect of the fireproof check valve in the high-temperature environment. The fireproof check valve comprises a valve body, a valve sheet, a connection rod, a dialing sheet, a temperature sensing component and an elastic component; an air outlet is formed in the valve body; the valve sheet is covered on the air outlet and is connected with the valve body through the connection rod; the dialing sheet is rotatably connected with the valve body; the temperature sensing component is fixed on the valve body; one end of the elastic component is fixedly connected with the valve body; the other end of the elastic component is connected with the dialing sheet and is used for driving the dialing sheet to abut against the temperature sensing component; a clamping part is arranged on the dialing sheet; a clamping matching part is arranged on the connection rod; when the elastic component drives the dialing sheet to rotate and squeeze the connection rod relative to the valve body so as to enable the connection rod to close the air outlet via the valve sheet, the clamping part is matched with the clamping matching part so as to prevent the connection rod from rotating relative to the valve body.
Description
Technical field
The present invention relates to a kind of fire-preventing check valve.
Background technology
Fire-preventing check valve includes valve body, valve block, connecting rod, driving lever, temperature-sensing element and flexible member, and valve body is provided with aerofluxuss
Mouthful, valve block lid is located on the air vent, and valve block is connected with valve body by connecting rod, and driving lever is rotated with valve body and is connected, temperature-sensing element
Be fixed on valve body, flexible member one end is fixedly connected with the valve body, the flexible member other end be connected with driving lever and drive driving lever with
Temperature-sensing element offsets, and after temperature-sensing element action, flexible member drives driving lever that connecting rod is rotated and extruded relative to valve body, so that connecting rod
Air vent is closed by valve block；When temperature-sensing element action, and flexible member are subject to high temperature continuous heating to lost its bounce, dial
Bar is separated under the blowing of air-flow in atmosphere with connecting rod.
When separating with connecting rod under driving lever in atmosphere the blowing of air-flow, valve block will blow lower band by air-flow in atmosphere
Dynamic connecting rod is rotated relative to valve body, to realize opening air vent.It is anti-that this will cause fire-preventing check valve to lose in high temperature environments
The effect of fire screen cigarette.
The content of the invention
Problem to be solved by this invention is just to provide a kind of fire-preventing check valve, so that fire-preventing check valve is in high temperature environments
Play its effect every cigarette.
To solve the above problems, the present invention provides following technical scheme：
A kind of fire-preventing check valve, including valve body, valve block, connecting rod, plectrum, temperature-sensing element and flexible member, on the valve body
Air vent is provided with, the valve block lid is located on the air vent, and the valve block is connected with the valve body by the connecting rod, described
Plectrum and the valve body are rotated and are connected, and the temperature-sensing element is fixed on the valve body, described flexible member one end and the valve
Body is fixedly connected, and the flexible member other end is connected with the plectrum and drives the plectrum to offset with the temperature-sensing element,
The plectrum is provided with Access Division, and the connecting rod is provided with clamping engagement portion；
After the temperature-sensing element action, the flexible member drives the plectrum to rotate relative to the valve body and extrudes described
Connecting rod, so that the connecting rod closes the air vent by the valve block；
When the flexible member drives the plectrum that the connecting rod is rotated and extruded relative to the valve body, so that the connecting rod
When closing the air vent by the valve block, the Access Division is engaged with the clamping engagement portion, to prevent the connecting rod
Rotate relative to the valve body.
Further, when the Access Division is engaged with the clamping engagement portion, the plectrum top and the connecting rod
Dorsad the side of the valve block is corresponding, to prevent the relatively described valve body in the plectrum top from moving to valve block direction；The plectrum
Bottom is offseted by the Access Division with the clamping engagement portion, to prevent the plectrum top to away from valve block direction fortune
It is dynamic.
Further, the plectrum includes rotating the plectrum body and rotation stop piece being connected, the rotation stop piece with the valve body
Rotate with the plectrum body and be connected, the Access Division is the rotation stop piece, the connecting rod is provided with draw-in groove, and the draw-in groove is institute
State clamping engagement portion and the rotation stop piece can be inserted in the draw-in groove.
Further, the connecting rod includes con-rod only and axle sleeve, and the con-rod only is provided with mounting ring, the installation
Ring is provided with the installing hole coordinated with the axle sleeve, and the draw-in groove is opened on the outline of the mounting ring.
Further, the con-rod only includes the first linkage section and the second linkage section being sequentially connected, and described first connects
Connect section and the valve block and rotate and be connected, the mounting ring is arranged on second linkage section, first linkage section with it is described
90 ° of angle ＜ between second linkage section, the upper surface of second linkage section is obliquely installed, and second linkage section is upper
End face is inclined upwardly positioned at axle sleeve one end by the second linkage section and is formed, when the flexible member drives the relatively described valve of the plectrum
Body rotates and extrudes the connecting rod, during so that the connecting rod closing the air vent by the valve block, under the plectrum body
Portion can offset with the upper surface of second linkage section.
Further, the plectrum body is provided with the avoidance hole for avoiding the connecting rod, when the flexible member drives
Move the plectrum and the connecting rod is rotated and extruded relative to the valve body, so that the connecting rod closes the aerofluxuss by the valve block
Mouthful when, the hole wall interference fit in the connecting rod and the avoidance hole.
Further, the rotation stop piece is provided with baffle plate, when the flexible member drives the plectrum with temperature-sensitive unit
When part offsets, the baffle plate can offset with the plectrum body, to prevent the rotation stop piece from moving to the draw-in groove direction.
Further, the plectrum body is provided with rotating shaft, and the rotation stop piece is provided with the axis hole coordinated with the rotating shaft.
Further, the plectrum body is provided with the first breach, and the rotating shaft is located at described the by the plectrum body
The side wall of one indentation, there stretches out to be formed.
Further, the rotation stop piece is provided with the second breach.
Beneficial effects of the present invention：
The fire-preventing check valve of the present invention includes plectrum and connecting rod, and plectrum is provided with Access Division, and connecting rod is provided with clamping engagement
Portion, after temperature-sensing element action, flexible member drives plectrum that connecting rod is rotated and extruded relative to valve body, so that connecting rod is closed by valve block
Close air vent；When flexible member drives plectrum that connecting rod is rotated and extruded relative to valve body, so that connecting rod closes air vent by valve block
When, Access Division is engaged with clamping engagement portion, to realize limiting the scope of the relative link motion of plectrum.It is so designed that, by limit
Scope of the plectrum with respect to link motion is determined, to increase the resistance that connecting rod is rotated relative to valve body, when the resistance that connecting rod is rotated relative to valve body
When power increases, fire-preventing check valve fire-proof smoke insulation effect in high temperature environments will be greatly improved.
Description of the drawings
Fig. 1 is the axonometric chart of fire-preventing check valve in the preferred embodiment of the present invention；
Fig. 2 is the axonometric chart (temperature-sensing element is not moved) of part fire-preventing check valve in the preferred embodiment of the present invention；
Fig. 3 is the axonometric chart of plectrum body in the preferred embodiment of the present invention；
Fig. 4 is the axonometric chart that the preferred embodiment of the present invention stops rotor；
Fig. 5 is the front view of connecting rod in the preferred embodiment of the present invention；
Fig. 6 is the axonometric chart (temperature-sensing element is moved) of part fire-preventing check valve in the preferred embodiment of the present invention.
Specific embodiment
The technical scheme of the embodiment of the present invention is explained and illustrated with reference to the accompanying drawing of the embodiment of the present invention, but under
It is only the preferred embodiments of the present invention to state embodiment, and not all.Based on the embodiment in embodiment, those skilled in the art
Other embodiment is obtained on the premise of creative work is not made, protection scope of the present invention is belonged to.
With reference to Fig. 1, a kind of fire-preventing check valve, including valve body 1, valve block 2, connecting rod 3, plectrum, temperature-sensing element 5 and elasticity unit
The flexible member is referred to as the first flexible member 6 by part, the present embodiment for ease of distinguishing, and valve body 1 is provided with air vent 11, valve block
2 lids are located on air vent 11, and valve block 2 is connected with valve body 1 by connecting rod 3, and plectrum is rotated with valve body 1 and is connected, and temperature-sensing element 5 is fixed
On valve body 1, the one end of the first flexible member 6 is fixedly connected with valve body 1, and the other end of the first flexible member 6 is connected with plectrum and drives
Dynamic plectrum offsets with temperature-sensing element 5, and plectrum is provided with Access Division, and connecting rod 3 is provided with clamping engagement portion；
After the action of temperature-sensing element 5, the first flexible member 6 drives plectrum that connecting rod 3 is rotated and extruded relative to valve body 1, so that even
Bar 3 closes air vent 11 by valve block 2；
When the first flexible member 6 drives plectrum that connecting rod 3 is rotated and extruded relative to valve body 1, so that connecting rod 3 is closed by valve block 2
When closing air vent 11, Access Division is engaged with clamping engagement portion, to prevent connecting rod 3 from rotating relative to valve body 1.
In the present embodiment, the temperature-sensing element 5 includes the first copper sheet and the second copper sheet, and the first copper sheet passes through with the second copper sheet
Meltable solder (the meltable solder includes the solders such as secret base, indio, tinbase, cadmio, zinc-base and lead base) is connected as a single entity, the first bronze medal
Piece is fixedly connected with valve seat 1, and the second copper sheet offsets with plectrum body 4, after meltable solder high temperature melting, the first copper sheet and second
Copper sheet is separated, and after the stop that plectrum body 4 loses the second copper sheet, the first flexible member 6 drives plectrum body 4 and the phase of connecting rod 3
Support, to realize in the insertion draw-in groove 3111 of rotation stop piece 7.In other embodiments of the invention, the temperature-sensing element is memory metal,
When memory metal receives deformation temperature, memory metal is separated with plectrum body, to realize that the first flexible member drives plectrum
Body offsets with connecting rod；When the temperature that memory metal receives surrounding is less than deformation temperature, memory metal will recover original
Shape.
It should be noted that：In the present embodiment, " action of temperature-sensing element 5 " refers to that " meltable solder is heated causes
Two copper sheets are separated with the first copper sheet " This move.
Can be seen that when Access Division is engaged with clamping engagement portion from Fig. 1 and Fig. 6, plectrum top and connecting rod 3 dorsad valve
The side correspondence of piece 2, to prevent the relative valve body 1 in plectrum top from moving to the direction of valve block 2；Plectrum bottom is by Access Division and clamping
Auxiliary section offsets, to prevent plectrum top to moving away from the direction of valve block 2.In other embodiments of the invention, Access Division is worked as
When being engaged with clamping engagement portion, plectrum top can not also be corresponding with the side of connecting rod dorsad valve block.
With reference to Fig. 2, the plectrum of the present embodiment includes rotating the plectrum body 4 being connected with valve body 1, specifically：From Fig. 2 and Tu
3 can be seen that plectrum body 4 is provided with two first rotating shafts 42 and a gag lever post 43, and valve body 1 is provided with two the first axis holes
12, when wherein one first rotating shaft 42 is inserted in one of the first axis hole 12, and another first rotating shaft 42 inserts another
During the first axis hole 12, plectrum body 4 is rotated with valve body 1 and is connected；Wherein one first rotating shaft 42 is parallel with gag lever post 43 and two
Person's correspondence, the first flexible member 6 is enclosed within the first rotating shaft 42, the other end of the first flexible member 6 extruding gag lever post 43, to keep
Plectrum body 4 extrudes the trend of temperature-sensing element 5.It is so designed that, increases the resistance to deformation intensity of plectrum body 4.The present invention its
In his embodiment, first rotating shaft is arranged on valve body, and the first axis hole is opened on plectrum body, and the first flexible member other end is squeezed
Pressure plectrum body.
With reference to Fig. 2, the plectrum of the present embodiment also includes rotation stop piece 7, and rotation stop piece 7 is rotated with plectrum body 4 and is connected, the card
Rotor 7 till socket part, connecting rod 3 is provided with draw-in groove 3111, and the draw-in groove 3111 is that clamping engagement portion and rotation stop piece 7 can be inserted into and block
In groove 3111, specifically：From figs. 3 and 4 it can be seen that plectrum body 4 is provided with rotating shaft, the present embodiment is for ease of distinguishing institute
State rotating shaft and be referred to as the second rotating shaft 44, rotation stop piece 7 is provided with the axis hole coordinated with the second rotating shaft 44, and the present embodiment will for ease of distinguishing
The axis hole is referred to as the second axis hole 73, and the second axis hole 73 is inserted in the second rotating shaft 44, to realize that rotation stop piece 7 is rotated with plectrum body 4
Connection.It is so designed that, reduces the thickness of plectrum body 4.In other embodiments of the invention, the second rotating shaft is arranged on rotation stop piece
On, the second axis hole is opened on plectrum body.
Certainly, in other embodiments of the invention, rotation stop piece can be connected as a single entity with plectrum body, when rotation stop piece with dial
When piece body is connected as a single entity, draw-in groove is opened on rotation stop piece, and connecting rod is provided with the projection coordinated with draw-in groove.
With reference to Fig. 1, Fig. 2 and Fig. 5, the connecting rod 3 of the present embodiment includes con-rod only 31 and axle sleeve 32, sets on con-rod only 31
Have a mounting ring 311, mounting ring 311 is provided with the installing hole 3022 coordinated with axle sleeve 32, the insertion installing hole 3022 of axle sleeve 32 and
Axle sleeve 32 is connected as a single entity with con-rod only 31 by welding, and draw-in groove 3111 is opened on the outline of mounting ring 311.So set
Meter, improves the positional precision of draw-in groove 3111.In other embodiments of the invention, axle sleeve is integrally formed with con-rod only, also,
Draw-in groove is opened on axle sleeve.
With reference to Fig. 1 and Fig. 5, the con-rod only 31 of the present embodiment includes that the first linkage section 301 and second being sequentially connected connects
Section 302 is connect, the first linkage section 301 is rotated with valve block 2 and is connected, and mounting ring 311 is arranged on the second linkage section 302, the first connection
Angle between the linkage section 302 of section 301 and second is a, and 90 ° of a ＜, the upper surface 3021 of the second linkage section 302 is obliquely installed, and
And the upper surface 3021 of second linkage section 302 is inclined upwardly positioned at the one end of axle sleeve 32 by the second linkage section 302 and is formed, when first
Flexible member 6 drives plectrum body 4 that connecting rod 3 is rotated and extruded relative to valve body 1, so that connecting rod 3 closes air vent 11 by valve block 2
When, the bottom of plectrum body 4 can offset with the upper surface 3021 of the second linkage section 302.It is so designed that, the top of increase plectrum body 4
To the resistance that the direction of valve block 2 is moved.In other embodiments of the invention, the upper surface of the second linkage section is horizontally disposed with, when the
One flexible member drives plectrum body that connecting rod is rotated and extruded relative to valve body, during so that connecting rod closing air vent by valve block, dials
Piece body lower part offsets with the upper surface of the second linkage section.
With reference to Fig. 2 and Fig. 5, the fire-preventing check valve of the present embodiment also includes screw 20, bolt 8 and nut 9, and screw 20 runs through
First through hole on valve block 2 is simultaneously fixedly connected with the first screwed hole 3011 on the first linkage section 301, to realize connecting rod 3 and valve
Piece 2 rotates connection；On the second through hole of the bolt 8 on the valve body 1, the second screwed hole 321 on axle sleeve 32, valve body 1 the 3rd
After through hole, it is fixedly connected with the 3rd screwed hole on nut 9, is connected with realizing that connecting rod 3 is rotated with valve body 1.The present invention its
In his embodiment, connecting rod is rotated by the first rivet with valve block and is connected, and connecting rod is rotated by the second rivet with valve body and is connected, when even
Bar is rotated when being connected with valve body by the second rivet, and the second rivet is fixedly connected with connecting rod.
With reference to Fig. 2 and Fig. 3, the plectrum body 4 of the present embodiment is provided with the avoidance hole 41 for avoiding connecting rod 3, when first
Flexible member 6 drives plectrum body 4 that connecting rod 3 is rotated and extruded relative to valve body 1, so that connecting rod 3 closes air vent 11 by valve block 2
When, the hole wall interference fit in connecting rod 3 and avoidance hole 41.It is so designed that, when the first flexible member 6 drives the relative valve of plectrum body 4
Body 1 rotates and extrudes connecting rod 3, during so that connecting rod 3 closing air vent 11 by valve block 2, further increases the relative valve of plectrum body 4
Suffered resistance in the rotation process of body 1.
Preferably, the plectrum body 4 of the present embodiment is provided with the first breach 45, and the second rotating shaft 44 is located at by plectrum body 4
Side wall at first breach 45 stretches out to be formed.It is so designed that, it is to avoid in the rotation process of the relative plectrum body 4 of rotation stop piece 7
Interfere with valve body 1.
With reference to Fig. 1, Fig. 2 and Fig. 4, the rotation stop piece 7 of the present embodiment is provided with baffle plate 71, when the first flexible member 6 drives institute
When stating plectrum body 4 and temperature-sensing element 5 and offseting, baffle plate 71 can offset with plectrum body 4, to prevent rotation stop piece 7 to draw-in groove 3111
Move in direction.It is so designed that, when temperature-sensing element 5 is not operating, Access Division cannot be engaged with clamping engagement portion.
See figures.1.and.2, the fire-preventing check valve of the present embodiment also includes the second flexible member 10 being enclosed within axle sleeve 32,
The one end of second flexible member 10 is fixedly connected with valve body 1, and the other end of the second flexible member 10 is fixedly connected with con-rod only 31, when
When temperature-sensing element 5 is not operating, the second flexible member 10 discharges elastic potential energy and orders about connecting rod 3 and rotates relative to valve body 1, to realize valve
Piece 2 closes air vent 11.
With reference to Fig. 2 and Fig. 4, the rotation stop piece 7 of the present embodiment is provided with the second breach for avoiding the second flexible member 10
72.It is so designed that, it is to avoid 7 and second flexible member of rotation stop piece 10 produces interference.
In the present embodiment, first flexible member 6 and second flexible member 10 are torsion spring.The present invention other
In embodiment, first flexible member and second flexible member are compression spring.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and is familiar with
Those skilled in the art should be understood that the present invention includes but is not limited to accompanying drawing and the above content described in specific embodiment.
The modification of any function and structure principle without departing from the present invention is intended to be included in the scope of claims.
Claims (10)
1. a kind of fire-preventing check valve, including valve body, valve block, connecting rod, plectrum, temperature-sensing element and flexible member, set on the valve body
There is air vent, the valve block lid is located on the air vent, and the valve block is connected with the valve body by the connecting rod, described group
Piece and the valve body are rotated and are connected, and the temperature-sensing element is fixed on the valve body, described flexible member one end and the valve body
It is fixedly connected, the flexible member other end is connected with the plectrum and drives the plectrum to offset with the temperature-sensing element, its
It is characterised by, the plectrum is provided with Access Division, the connecting rod is provided with clamping engagement portion；
After the temperature-sensing element action, the flexible member drives the plectrum that the company is rotated and extruded relative to the valve body
Bar, so that the connecting rod closes the air vent by the valve block；
When the flexible member drives the plectrum that the connecting rod is rotated and extruded relative to the valve body, so that the connecting rod passes through
When the valve block closes the air vent, the Access Division is engaged with the clamping engagement portion, to prevent the connecting rod relative
The valve body is rotated.
2. fire-preventing check valve as claimed in claim 1, it is characterised in that when the Access Division is engaged with the clamping engagement portion
When, the side of the plectrum top and the connecting rod dorsad valve block is corresponding, to prevent the relatively described valve in the plectrum top
Move in body to valve block direction；The plectrum bottom is offseted by the Access Division with the clamping engagement portion, to prevent described dialling
Piece top away from the valve block direction to moving.
3. fire-preventing check valve as claimed in claim 1, it is characterised in that the plectrum includes and the valve body rotate be connected group
Piece body and rotation stop piece, the rotation stop piece and the plectrum body are rotated and be connecteds, and the Access Division is the rotation stop piece, the company
Bar is provided with draw-in groove, and the draw-in groove is that the clamping engagement portion and the rotation stop piece can be inserted in the draw-in groove.
4. fire-preventing check valve as claimed in claim 3, it is characterised in that the connecting rod includes con-rod only and axle sleeve, the company
Bar body is provided with mounting ring, and the mounting ring is provided with the installing hole coordinated with the axle sleeve, and the draw-in groove is opened in described
On the outline of mounting ring.
5. fire-preventing check valve as claimed in claim 4, it is characterised in that the con-rod only includes the first connection being sequentially connected
Section and the second linkage section, first linkage section is rotated with the valve block and is connected, and the mounting ring is arranged on second connection
Duan Shang, 90 ° of the angle ＜ between first linkage section and second linkage section, the upper surface of second linkage section inclines
Arrange, and the upper surface of second linkage section is inclined upwardly positioned at axle sleeve one end by the second linkage section and is formed, when the elasticity
Plectrum described in element drives rotates and extrudes the connecting rod relative to the valve body, so that the connecting rod closes institute by the valve block
When stating air vent, the plectrum body lower part can offset with the upper surface of second linkage section.
6. the fire-preventing check valve as described in one of claim 3 to 5, it is characterised in that the plectrum body is provided with for avoiding
The avoidance hole of the connecting rod, when the flexible member drives the plectrum that the connecting rod is rotated and extruded relative to the valve body, with
When making the connecting rod close the air vent by the valve block, the hole wall interference fit in the connecting rod and the avoidance hole.
7. the fire-preventing check valve as described in one of claim 3 to 5, it is characterised in that the rotation stop piece is provided with baffle plate, when described
When flexible member drives the plectrum to offset with the temperature-sensing element, the baffle plate can offset with the plectrum body, to prevent
Move in the rotation stop piece to the draw-in groove direction.
8. the fire-preventing check valve as described in one of claim 3 to 5, it is characterised in that the plectrum body is provided with rotating shaft, described
Rotation stop piece is provided with the axis hole coordinated with the rotating shaft.
9. fire-preventing check valve as claimed in claim 8, it is characterised in that the plectrum body is provided with the first breach, described turn
Axle is stretched out by the side wall that the plectrum body is located at first indentation, there and is formed.
10. the fire-preventing check valve as described in one of claim 3 to 5, it is characterised in that the rotation stop piece is provided with the second breach.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147354.2A CN106678400B (en) | 2017-03-13 | 2017-03-13 | A kind of fire-preventing check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147354.2A CN106678400B (en) | 2017-03-13 | 2017-03-13 | A kind of fire-preventing check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106678400A true CN106678400A (en) | 2017-05-17 |
| CN106678400B CN106678400B (en) | 2018-09-28 |
Family
ID=58828747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710147354.2A Active CN106678400B (en) | 2017-03-13 | 2017-03-13 | A kind of fire-preventing check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106678400B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488445A (en) * | 2018-06-26 | 2018-09-04 | 盐城市百世达建材有限公司 | A kind of fire-preventing check valve |
| CN110332343A (en) * | 2019-07-19 | 2019-10-15 | 广州市法玉环保科技有限公司 | A kind of fire-preventing check valve |
| CN110440036A (en) * | 2019-07-19 | 2019-11-12 | 广州市法玉环保科技有限公司 | A kind of fire-preventing check valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05248549A (en) * | 1992-03-06 | 1993-09-24 | Nakakita Seisakusho:Kk | Check valve |
| CN201535376U (en) * | 2009-11-20 | 2010-07-28 | 李永彬 | Fireproof check valve |
| CN202082439U (en) * | 2011-03-25 | 2011-12-21 | 曹正祥 | Oily fume-discharged.fire-prevention check valve |
| CN203309217U (en) * | 2013-05-10 | 2013-11-27 | 盐城雷宇阀业有限公司 | Oil and smoke discharging and fireproof check valve |
| CN104344031A (en) * | 2014-10-26 | 2015-02-11 | 重庆科众机械有限公司 | Fire-proof check valve |
-
2017
- 2017-03-13 CN CN201710147354.2A patent/CN106678400B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05248549A (en) * | 1992-03-06 | 1993-09-24 | Nakakita Seisakusho:Kk | Check valve |
| CN201535376U (en) * | 2009-11-20 | 2010-07-28 | 李永彬 | Fireproof check valve |
| CN202082439U (en) * | 2011-03-25 | 2011-12-21 | 曹正祥 | Oily fume-discharged.fire-prevention check valve |
| CN203309217U (en) * | 2013-05-10 | 2013-11-27 | 盐城雷宇阀业有限公司 | Oil and smoke discharging and fireproof check valve |
| CN104344031A (en) * | 2014-10-26 | 2015-02-11 | 重庆科众机械有限公司 | Fire-proof check valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488445A (en) * | 2018-06-26 | 2018-09-04 | 盐城市百世达建材有限公司 | A kind of fire-preventing check valve |
| CN108488445B (en) * | 2018-06-26 | 2023-12-22 | 盐城市百世达建材有限公司 | Fireproof check valve |
| CN110332343A (en) * | 2019-07-19 | 2019-10-15 | 广州市法玉环保科技有限公司 | A kind of fire-preventing check valve |
| CN110440036A (en) * | 2019-07-19 | 2019-11-12 | 广州市法玉环保科技有限公司 | A kind of fire-preventing check valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106678400B (en) | 2018-09-28 |
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Application publication date: 20170517 Assignee: Lianzhi (Beijing) Technical Service Co., Ltd Assignor: HANGZHOU XIAOMI ENVIRONMENT TECHNOLOGY Co.,Ltd. Contract record no.: X2020990000381 Denomination of invention: Fire-proof check valve Granted publication date: 20180928 License type: Exclusive License Record date: 20200727 |
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Assignee: Lianzhi (Beijing) Technical Service Co., Ltd Assignor: HANGZHOU XIAOMI ENVIRONMENT TECHNOLOGY Co.,Ltd. Contract record no.: X2020990000381 Date of cancellation: 20201113 |
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Application publication date: 20170517 Assignee: Lianzhi (Beijing) Technical Service Co., Ltd Assignor: HANGZHOU XIAOMI ENVIRONMENT TECHNOLOGY Co.,Ltd. Contract record no.: X2020990000595 Denomination of invention: A fire check valve Granted publication date: 20180928 License type: Exclusive License Record date: 20201113 |