CN110319211A - Wet alarm valve is compensated in a kind of - Google Patents
Wet alarm valve is compensated in a kind of Download PDFInfo
- Publication number
- CN110319211A CN110319211A CN201910706078.8A CN201910706078A CN110319211A CN 110319211 A CN110319211 A CN 110319211A CN 201910706078 A CN201910706078 A CN 201910706078A CN 110319211 A CN110319211 A CN 110319211A
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- CN
- China
- Prior art keywords
- short cylindrical
- valve
- hole
- alarm
- grades
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000476 body water Anatomy 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/52—Means for additional adjustment of the rate of flow
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention discloses compensate wet alarm valve in one kind.Wet alarm valve is compensated in a kind of, packet valve body, flap are mounted on the interior compensating spool of flap center；Interior compensating spool includes valve core, it is integrally formed and by fall 3 grades of T-shaped heads, short cylindrical, angularly successively the vertically arranged valve core that at least 3 pieces of bar shaped guide plates are constituted is slidably mounted on the through-hole of flap center setting on short cylindrical surface；Further include current limiting plate, position-limiting drum, threaded post, round nut, current limiting plate, position-limiting drum are successively fixed on short cylindrical bottom surface using round nut and threaded post is located on the part outside the blind threaded hole of short cylindrical bottom surface.Compensation wet alarm valve, which prevents, in of the invention leaks, and improves stability, eliminates the alarm failure risk of appearance；Easily realize the purpose that interior compensation wet alarm valve meets UL/FM/Vds standard requirements alarm range of flow.
Description
Technical field
The invention belongs to a kind of alarm valve, especially belong to compensate wet alarm valve in one kind.
Background technique
As people are higher and higher to fire valve cognition and attention degree, the application field of alarm valve is also increasingly wider
It is wealthy.Currently, existing alarm valve is mostly external compensation wet alarm valve and interior compensation wet alarm valve, existing external compensation wet alarm valve
It sometimes appear that leakage, the unstable problem of performance, there is also the risk for occurring that alarm is caused to be failed sometimes, and meanwhile it is this outer
Compensate the wet alarm valve problem short there is also service life；Compensating spool structure homogeneity in existing interior compensation wet alarm valve
Change is higher, and flow of alarming rapid development with increasing for test pressure is far from satisfying the alarm of UL/FM/Vds standard requirements
Range of flow.How to prevent interior compensation wet alarm valve from leaking, how how to improve interior compensation wet alarm valve stability
The alarm failure risk that compensation wet alarm valve occurs in eliminating；Interior compensation wet alarm valve how is set to meet UL/FM/Vds mark
The alarm range of flow of alignment request is problem to be solved.
Summary of the invention
Wet alarm valve is compensated in one kind the technical problems to be solved by the present invention are: providing.Use the interior compensation wet type
Alarm valve can prevent the interior compensation wet alarm valve from leaking, and can improve the interior compensation wet alarm valve stability, can eliminate
The alarm failure risk that the interior compensation wet alarm valve occurs；The interior compensation wet alarm valve can be made to meet UL/FM/Vds standard
It is required that alarm range of flow.
The technical solution that the present invention solves above-mentioned technical problem is: compensation wet alarm valve in a kind of, packet valve body, flap,
The valve body has water inlet end and system side, and valve inleting water end is connected to hydraulic pipeline, the alarm pipeline and report being arranged on valve body
Warning device is installed on alert pipeline, restricting orifice is installed on drainage hole below alarm pipeline, it is characterized in that: further including installation
Interior compensating spool in flap center；The interior compensating spool include valve core, the valve core include fall 3 grades it is T-shaped
Head, short cylindrical, at least 3 pieces of bar shaped guide plates are provided with short cylindrical, isogonism on short cylindrical surface on 3 grades of T-shaped head bottom surfaces
Degree is successively vertically provided at least 3 pieces of bar shaped guide plates, short cylindrical, the short cylindrical being arranged on 3 grades of T-shaped heads and its bottom surface
And its angularly successively vertically arranged at least 3 pieces of bar shaped guide plates are integrally formed on surface, it is integrally formed and by falling 3 grades of T words
Forming head, short cylindrical, the valve core sliding that angularly successively vertically arranged at least 3 pieces of bar shaped guide plates are constituted on short cylindrical surface
Be mounted on flap center setting through-hole on, the valve core being slidably mounted on the through-hole of flap center fall 3 grades it is T-shaped
The arc of installation sealing ring is additionally provided on the head position that first order inverted T-shape head and second level inverted T-shape head intersect from top to bottom
Connected in star；It further include current limiting plate, position-limiting drum, threaded post, round nut, with 3 grades T-shaped integrally formed short cylindrical bottom surface
It is provided with the blind threaded hole matched with the threaded post on center, is provided with and the spiral shell on the current limiting plate center
The threaded hole that line column matches, the threaded post threaded upper ends set be mounted on under 3 grades of T-shaped integrally formed short cylindricals
In the blind threaded hole being arranged on bottom center position, which is located on the part outside the blind threaded hole of short cylindrical bottom surface successively
Set is installed with position-limiting drum, current limiting plate and current limiting plate, position-limiting drum is successively fixed on short cylindrical bottom surface and screw thread using round nut
Column is located on the part outside the blind threaded hole of short cylindrical bottom surface；
The current limiting plate is provided with 3-5 through-hole in the annular location of position-limiting drum, which is 2-4mm.
The restricting orifice and its install and use the prior art.
Use process of the invention is: position-limiting drum is provided between current limiting plate and valve core of the present invention, by utilizing limit
Cylinder can change current limiting plate and valve core relative position, and simultaneous selection is provided with the present invention limit of respective numbers through-hole and through-hole diameter
Flowing plate makes flow adjustable extent increase of alarming, to meet alarm stream in interior compensation wet alarm valve FM/UL/Vds Valuation Standard
Amount requires；
According to traffic requirement of alarming in interior compensation wet alarm valve FM/UL/Vds Valuation Standard, the sheet of corresponding length is selected
Invention position-limiting drum, selection are provided with the current limiting plate of the present invention of respective numbers through-hole and through-hole diameter, and by the limit of corresponding length
The current limiting plate that cylinder, selection are provided with respective numbers through-hole and through-hole diameter, which successively covers, to be mounted on threaded post and is located at short cylindrical bottom surface
Current limiting plate, position-limiting drum are successively fixed on short cylindrical bottom surface and threaded post position on part outside blind threaded hole and using round nut
In on the part outside the blind threaded hole of short cylindrical bottom surface；By fixed installation one by position-limiting drum, current limiting plate, threaded post, circle spiral shell
In the present invention that female, valve core is constituted compensating spool and 3 grades of T-shaped heads are fallen using valve core of the present invention the first order is fallen from top to bottom
The sealing ring sealing installed in the arc groove being arranged on T-shaped head and second level inverted T-shape head intersection location is slidably mounted on
On the through-hole of flap center setting.Flap, flap center when this practical new interior compensation wet alarm valve set condition
It seals compensating spool in the present invention that is slidably installed using sealing ring on through-hole to be in close state, when compensation wet type report in the present invention
In the hydraulic pipeline of alert valve body water inlet end connection when pressure oscillation, pressure can be by being moved up by compensating spool in the present invention
By pressure compensation to valve system side of the present invention, flap is not opened in the gap of generation, avoids false alarm；When generation fire spray head
When water spray, the water flow for flowing through compensation wet alarm valve in the present invention reaches alarm flow, is more than that current limiting plate of the present invention is passable
(current limiting plate plays the role of throttling to maximum stream flow, has a maximum that can limit in the present invention and mend by flow under a certain pressure
Flow of the wet alarm valve valve inleting water end to system side moisturizing is repaid, can be opened rapidly more than flap after this flow), flap is beaten
It opens, valve body and valve seat aperture enters the alarm pipeline alarm being arranged on valve body of the present invention to water through the invention；Into alarm pipeline
The warning water system alarm for the warning device installed on water a part excitation alarm pipeline, pressure switch action launching fire pump are opened
It opens, another part is flowed out by the restricting orifice installed on drainage hole below alarm pipeline.Restricting orifice can ensure in the present invention
Pipeline between the alarm valve and warning water system of the warning device installed on compensation wet alarm valve set condition alarm pipeline
It remains anhydrous, can guarantee that alarm pipeline distributes enough alarm pressures to warning water system alarm mouth.
The beneficial effects of the present invention are: valve body has water inlet end and system side since the present invention is provided with valve body, flap,
Valve inleting water end connects hydraulic pipeline, is installed with warning device, alarm pipe on the alarm pipeline and alarm pipeline being arranged on valve body
Restricting orifice is installed on drainage hole below road, is also provided with the interior compensating spool for being mounted on flap center；Interior recuperation valve
Core include valve core, valve core include it is integrally formed fall 3 grades of T-shaped heads, short cylindrical, at least 3 pieces of bar shaped guide plates, one at
Shape and by falling 3 grades of T-shaped heads, short cylindrical, angularly successively vertically arranged at least 3 pieces of bar shaped guide plate structures on short cylindrical surface
At valve core be slidably mounted on flap center setting through-hole on；It is also provided with current limiting plate, position-limiting drum, threaded post, circle
Nut, is provided with the threaded hole matched with the threaded post on current limiting plate center, threaded post threaded upper ends set be mounted on
It is arranged in blind threaded hole on 3 grades T-shaped integrally formed short cylindrical bottom surface center, threaded post is located under short cylindrical
Successively set is installed with position-limiting drum, current limiting plate and uses round nut successively by current limiting plate, limit on part outside the blind threaded hole in bottom surface
Cylinder is fixed on short cylindrical bottom surface and threaded post is located on the part outside the blind threaded hole of short cylindrical bottom surface；Current limiting plate is close to limit
It is provided with 3-5 through-hole in the annular location of cylinder, which is 2-4mm.Compensation wet alarm valve prevents in of the invention
It leaks, improves interior compensation wet alarm valve stability, eliminate the alarm failure wind that interior compensation wet alarm valve occurs
Danger；According to traffic requirement of alarming in interior compensation wet alarm valve FM/UL/Vds Valuation Standard, the present invention limit of corresponding length is selected
Position cylinder, selection are provided with the current limiting plate of the present invention of respective numbers through-hole and through-hole diameter, and by the position-limiting drum of corresponding length, selection
The current limiting plate for being provided with respective numbers through-hole and through-hole diameter, which successively covers to be mounted on, is located at the blind spiral shell of short cylindrical bottom surface in threaded post
Current limiting plate, position-limiting drum are successively fixed on short cylindrical bottom surface and threaded post positioned at short on part outside pit and using round nut
On part outside the blind threaded hole of cylinder bottom surface；It easily realizes interior compensation wet alarm valve and meets UL/FM/Vds standard and want
The purpose for the alarm range of flow asked.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples；
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram that compensating spool amplifies in the present invention；
In attached drawing: 1. valve bodies, 2. flaps, 11 water inlet ends, 12. system sides, 3. valve cores, 31. fall 3 grades of T-shaped heads, 32.
Short cylindrical, 33. bar shaped guide plates, 4. sealing rings, 5. current limiting plates, 6. position-limiting drums, 7. threaded posts, 8. round nuts, 9. through-holes.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail.
Embodiment 1
As shown in Figure 1 and Figure 2, a kind of interior compensation wet alarm valve, packet valve body 1, flap 2, the valve body 1 have water inlet end
11 and system side 12,1 water inlet end 11 of valve body be connected to hydraulic pipeline (being not drawn into Figure of description), the report being arranged on valve body 1
It is installed with warning device (being not drawn into Figure of description), alarms on alert pipeline (being not drawn into Figure of description) and alarm pipeline
Restricting orifice (being not drawn into Figure of description) is installed on drainage hole below pipeline, it is characterized in that: further including being mounted on flap 2
The interior compensating spool of center；The interior compensating spool include valve core 3, the valve core 3 include fall 3 grades of T-shaped heads 31,
32,3 pieces of bar shaped guide plates 33 of short cylindrical, are provided with short cylindrical 32 on 3 grades of T-shaped 31 bottom surfaces of head, on 32 surface of short cylindrical
3 pieces of bar shaped guide plates 33 are angularly successively vertically provided with, the short cylindrical 32 that is arranged on 3 grades of T-shaped heads 31 and its bottom surface,
Angularly successively vertically arranged 3 pieces of bar shaped guide plates 33 are integrally formed on short cylindrical 32 and its surface, integrally formed and by falling 3
The T-shaped head 31 of grade, short cylindrical 32, angularly successively vertically arranged 3 pieces of bar shaped guide plates 33 are constituted on 32 surface of short cylindrical
Valve core 3 is slidably mounted on the through-hole of 2 center of flap setting, the valve being slidably mounted on 2 center through-hole of flap
Core 3 fall 3 grades of T-shaped heads 31 from top to bottom first order inverted T-shape head and the second level inverted T-shape head intersection position on also set up
There is the arc groove of installation sealing ring 4；It further include current limiting plate 5, position-limiting drum 6, threaded post 7, round nut 8, with 3 grades of T-shaped heads
It is provided with the blind threaded hole matched with the threaded post 7 on 31 integrally formed 32 bottom surface centers of short cylindrical, it is described
The threaded hole matched with the threaded post 7 is provided on 5 center of current limiting plate, the 7 threaded upper ends set of threaded post is mounted on
In the blind threaded hole being arranged on the 32 bottom surface center of short cylindrical integrally formed with 3 grades T-shaped heads 31, threaded post 7
In on the part outside the blind threaded hole of 32 bottom surface of short cylindrical successively set be installed with position-limiting drum 6, current limiting plate 5 and using round nut 8 according to
It is secondary current limiting plate 5, position-limiting drum 6 to be fixed on 32 bottom surface of short cylindrical and threaded post 7 is located at outside the blind threaded hole of 32 bottom surface of short cylindrical
Part on；
The current limiting plate 5 is provided with 3 through-holes 9 in the annular location of position-limiting drum 6, which is 2mm.
Embodiment 2
As shown in Figure 1 and Figure 2, a kind of interior compensation wet alarm valve, packet valve body 1, flap 2, the valve body 1 have water inlet end
11 and system side 12,1 water inlet end 11 of valve body be connected to hydraulic pipeline (being not drawn into Figure of description), the report being arranged on valve body 1
It is installed with warning device (being not drawn into Figure of description), alarms on alert pipeline (being not drawn into Figure of description) and alarm pipeline
Restricting orifice (being not drawn into Figure of description) is installed on drainage hole below pipeline, it is characterized in that: further including being mounted on flap 2
The interior compensating spool of center；The interior compensating spool include valve core 3, the valve core 3 include fall 3 grades of T-shaped heads 31,
32,3 pieces of bar shaped guide plates 33 of short cylindrical, are provided with short cylindrical 32 on 3 grades of T-shaped 31 bottom surfaces of head, on 32 surface of short cylindrical
3 pieces of bar shaped guide plates 33 are angularly successively vertically provided with, the short cylindrical 32 that is arranged on 3 grades of T-shaped heads 31 and its bottom surface,
Angularly successively vertically arranged 3 pieces of bar shaped guide plates 33 are integrally formed on short cylindrical 32 and its surface, integrally formed and by falling 3
The T-shaped head 31 of grade, short cylindrical 32, angularly successively vertically arranged 3 pieces of bar shaped guide plates 33 are constituted on 32 surface of short cylindrical
Valve core 3 is slidably mounted on the through-hole of 2 center of flap setting, the valve being slidably mounted on 2 center through-hole of flap
Core 3 fall 3 grades of T-shaped heads 31 from top to bottom first order inverted T-shape head and the second level inverted T-shape head intersection position on also set up
There is the arc groove of installation sealing ring 4；It further include current limiting plate 5, position-limiting drum 6, threaded post 7, round nut 8, with 3 grades of T-shaped heads
It is provided with the blind threaded hole matched with the threaded post 7 on 31 integrally formed 32 bottom surface centers of short cylindrical, it is described
The threaded hole matched with the threaded post 7 is provided on 5 center of current limiting plate, the 7 threaded upper ends set of threaded post is mounted on
In the blind threaded hole being arranged on the 32 bottom surface center of short cylindrical integrally formed with 3 grades T-shaped heads 31, threaded post 7
In on the part outside the blind threaded hole of 32 bottom surface of short cylindrical successively set be installed with position-limiting drum 6, current limiting plate 5 and using round nut 8 according to
It is secondary current limiting plate 5, position-limiting drum 6 to be fixed on 32 bottom surface of short cylindrical and threaded post 7 is located at outside the blind threaded hole of 32 bottom surface of short cylindrical
Part on；
The current limiting plate 5 is provided with 5 through-holes 9 in the annular location of position-limiting drum 6, which is 4mm.
Through the above description, those skilled in the art completely can be in the model without departing from this invention technical idea
In enclosing, various changes and amendments are carried out all within protection scope of the present invention.Unaccomplished matter of the invention, belongs to ability
The common knowledge of field technique personnel.
Claims (1)
1. compensating wet alarm valve in a kind of, packet valve body, flap, the valve body have water inlet end and system side, valve inleting water end
It is connected to hydraulic pipeline, warning device, row below alarm pipeline are installed on the alarm pipeline and alarm pipeline being arranged on valve body
Restricting orifice is installed, it is characterized in that: further including the interior compensating spool for being mounted on flap center on water hole；The interior compensation
Spool include valve core, the valve core include fall 3 grades of T-shaped heads, short cylindrical, at least 3 pieces of bar shaped guide plates, 3 grades it is T-shaped
It is provided with short cylindrical on head bottom surface, at least 3 pieces of bar shaped guide plates are angularly successively vertically provided on short cylindrical surface, 3
Angularly successively vertically arranged at least 3 pieces on short cylindrical, short cylindrical and its surface being arranged on the T-shaped head of grade and its bottom surface
Bar shaped guide plate is integrally formed, it is integrally formed and by fall 3 grades of T-shaped heads, short cylindrical, on short cylindrical surface it is angularly successively vertical
The valve core that at least 3 pieces of bar shaped guide plates being arranged are constituted is slidably mounted on the through-hole of flap center setting, sliding peace
Valve core on the through-hole of flap center falls 3 grades of T-shaped heads, and fall T for first order inverted T-shape head and the second level from top to bottom
The arc groove of installation sealing ring is additionally provided on the position of font head intersection；It further include current limiting plate, position-limiting drum, threaded post, circle
Nut is matched with being provided on 3 grades T-shaped integrally formed short cylindrical bottom surface center with the threaded post
Blind threaded hole is provided with the threaded hole matched with the threaded post, threaded post threaded upper ends set on the current limiting plate center
Be mounted on in the blind threaded hole that is arranged on 3 grades T-shaped integrally formed short cylindrical bottom surface center, threaded post position
In successively set is installed with position-limiting drum, current limiting plate and will successively be limited using round nut on the part outside the blind threaded hole of short cylindrical bottom surface
Flowing plate, position-limiting drum are fixed on short cylindrical bottom surface and threaded post is located on the part outside the blind threaded hole of short cylindrical bottom surface；
The current limiting plate is provided with 3-5 through-hole in the annular location of position-limiting drum, which is 2-4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910706078.8A CN110319211A (en) | 2019-08-01 | 2019-08-01 | Wet alarm valve is compensated in a kind of |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910706078.8A CN110319211A (en) | 2019-08-01 | 2019-08-01 | Wet alarm valve is compensated in a kind of |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110319211A true CN110319211A (en) | 2019-10-11 |
Family
ID=68125165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910706078.8A Pending CN110319211A (en) | 2019-08-01 | 2019-08-01 | Wet alarm valve is compensated in a kind of |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110319211A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001109521A (en) * | 1999-10-07 | 2001-04-20 | Yoshida Kojo:Kk | Pressure reducing valve |
| CA2548143A1 (en) * | 2005-05-26 | 2006-11-26 | The Viking Corporation | Check valve with an improved clapper and valve seat |
| CN202526815U (en) * | 2011-11-10 | 2012-11-14 | 浙江港龙消防机械有限公司 | Tilted petal type wet alarm valve |
| CN107061804A (en) * | 2017-04-11 | 2017-08-18 | 张新丰 | Protecting against shock swing check valve |
| CN109373001A (en) * | 2018-12-20 | 2019-02-22 | 明珠阀门集团有限公司 | A kind of forging isolated form vacuum trigger valve |
| CN210290803U (en) * | 2019-08-01 | 2020-04-10 | 济南迈克阀门科技有限公司 | Internal compensation wet alarm valve |
-
2019
- 2019-08-01 CN CN201910706078.8A patent/CN110319211A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001109521A (en) * | 1999-10-07 | 2001-04-20 | Yoshida Kojo:Kk | Pressure reducing valve |
| CA2548143A1 (en) * | 2005-05-26 | 2006-11-26 | The Viking Corporation | Check valve with an improved clapper and valve seat |
| CN202526815U (en) * | 2011-11-10 | 2012-11-14 | 浙江港龙消防机械有限公司 | Tilted petal type wet alarm valve |
| CN107061804A (en) * | 2017-04-11 | 2017-08-18 | 张新丰 | Protecting against shock swing check valve |
| CN109373001A (en) * | 2018-12-20 | 2019-02-22 | 明珠阀门集团有限公司 | A kind of forging isolated form vacuum trigger valve |
| CN210290803U (en) * | 2019-08-01 | 2020-04-10 | 济南迈克阀门科技有限公司 | Internal compensation wet alarm valve |
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