CN104265969A - Execution mechanism of fireproof valve - Google Patents
Execution mechanism of fireproof valve Download PDFInfo
- Publication number
- CN104265969A CN104265969A CN201410476844.3A CN201410476844A CN104265969A CN 104265969 A CN104265969 A CN 104265969A CN 201410476844 A CN201410476844 A CN 201410476844A CN 104265969 A CN104265969 A CN 104265969A
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- CN
- China
- Prior art keywords
- rocker
- cam
- housing
- tie
- plectrum
- 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
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses an execution mechanism of a fireproof valve. The execution mechanism comprises a casing (1), a motor (2), a transmission gear (3), a pull plate (4), a flexible plate (5), a cam (6), a swing frame (7), an eccentric fan-shaped gear (8) and a shifting piece; an output gear (13) of the motor (2) is meshed with the transmission gear (3); the pull plate (4) is provided with a hook (15); the pull plate (4) is hinged to the flexible plate (5); the flexible plate (5) is provided with a push head (17); the cam (6) is provided with a flanging (12) which is pushed by a push head (17); the swing frame (7) is provided with a limiting blocking column (24) and a rolling wheel (20); the eccentric fan-shaped gear (8) is hinged to the swing frame (7); the eccentric fan-shaped gear (8) is meshed with the output gear (13) when the rolling wheel (20) is located in a bayonet (18) of the cam (6); the shifting piece is provided with a gap (25) which is used for shifting the limiting blocking column (24). According to the execution mechanism of the fireproof valve, the action is rapid, the response is sensitive, and the opening and closing process of a valve body is smooth and stable.
Description
Technical field
The present invention relates to safety engineering field, is specifically a kind of actuator of fire-closing valve.
Background technique
At present, high-rise is all provided with ventilation duct, is provided with fire prevention fire-closing valve in ventilation duct.Fire prevention fire-closing valve comprises valve body and is fixed on the actuator of valve body outer (being generally fixed on above valve body), is provided with valve block, valve block is fixed with main shaft in the passage of valve body, and it is outer and be connected with actuator that main shaft stretches out valve body.Actuator is by rotating spindle, thus band moving valve plate rotates, and then realizes the opening and closing of whole valve body, time as parallel with the cross section of the passage in valve body in valve block, passage blocks by valve block, and valve body closes, during the cross-section normal of the passage in valve block and valve body, the aperture of whole valve body is maximum.
The actuator of early stage fire prevention fire-closing valve is manually operated type, needs user close to actuator's manually-operable with open-close valve.But when there is the condition of a fire, people often wish that the very first time withdraws, have no time and go to manually-operable near actuator, therefore design again DYN dynamic actuator in industry to realize the Remote operation of valve body, so that people withdraw as early as possible, as early as possible.
At present, the electronic execution machine of the fire prevention fire-closing valve of prior art includes an electromagnet, and above-mentioned actuator utilizes this electromagnet as the power source of actuator, by being energized or power-off to electromagnet, the mandrel of electromagnet is made to eject or retract, to drive each linkage part, finally realize opening or closing of valve block.The actuator being the board-like fire-closing valve of CN201220296804.7 as the patent No. typically utilizes electromagnet as the actuator of power source.
All there is a drawback in the actuator of the fire-closing valve of above-mentioned prior art: namely electromagnet energising is retracted or after power-off in the process that ejects under the action of the spring, electromagnetic force and spring force all may be large not, especially other linkage part of this actuator may because do not move and get rusty for a long time, like this, surface friction drag between each linkage part can increase, like this, the defect of the electromagnetic force of electromagnet or the deficiency of spring-return power can be highlighted further, the movement speed of whole mechanism is slow, it is blunt to respond, the opening and closing process of valve body is sluggish, even cause valve body cannot normally opening and closing time serious, its poor work stability.
Summary of the invention
The technical problem to be solved in the present invention is, provide a kind of mechanism action fast, respond sensitive, valve body opening and closing process is smooth steadily, the actuator of the fire-closing valve of good operating stability.
Technical solution of the present invention is, provides a kind of actuator of fire-closing valve, and it comprises housing, motor, driving gear, arm-tie, mobile plate, cam, rocker, eccentric sector and plectrum; The main shaft of fire prevention fire-closing valve is through housing;
Motor is arranged on housing, and the output gear of motor engages with the driving gear be rotatably arranged on housing;
Driving gear is provided with at least one pin;
Arm-tie one end is provided with the hook for hook pin, the other end of arm-tie and one end of mobile plate hinged, be provided with the first extension spring for resetting to arm-tie between arm-tie and housing;
The other end of mobile plate is provided with cuts somebody's hair, and mobile plate is rotatably linked on main shaft;
Cam be provided with upwards for by cut somebody's hair promote flange, cam is fixed on main shaft, and the circumferential surface of cam is provided with bayonet socket, is provided with the first torsion spring between cam and housing;
Rocker is rotatably arranged on housing through rocker axle, the second torsion spring that torsion is less than the first torsion spring is provided with between rocker and housing, rocker is fixed with epirelief in the limit stop post of rocker, rocker one end be provided with under the second torsion spring effect with the circumferential surface of cam against roller;
Eccentric sector is hinged on the other end of rocker and the radius of eccentric sector increases progressively gradually, be provided with the second extension spring for resetting to eccentric sector between eccentric sector and rocker, when roller is positioned at the bayonet socket of cam, the side of minor radius of eccentric sector is engaged with the output gear of motor;
Plectrum is rotatably linked on rocker axle and plectrum is positioned at the top of rocker, and plectrum one end is provided with for stirring limit stop post to make rocker to the breach rotated away from cam direction; The 3rd extension spring for making plectrum reset is provided with between the other end of plectrum and housing.
As improvement, pin is two, the same that two pins are positioned at driving gear diametrically and two pins with driving gear distance of center circle from all equal.
The working principle of the actuator of this fire-closing valve is divided into one of four states to set forth.
Under first state and original state, arm-tie, mobile plate, cam is all positioned at initial position, the pin of driving gear not yet with the hook hook of arm-tie, but hook is positioned on the movement locus of pin during initial position, be convenient to pin and rotate forward several angle as when 90 degree and hook hook, and the first extension spring be connected with arm-tie and the first torsion spring of being connected with cam are at all indeformable elastic force that do not produce of original state, the roller of rocker one end under the second torsion spring effect with the circumferential surface of cam against and be not positioned at bayonet socket, and the eccentric sector of the rocker the other end does not contact completely with the output gear of motor, and the main shaft fixing with cam is also positioned at initial position, passage blocks by the valve block on main shaft, and valve body closes.
In a first state, actuating motor, output gear band nutating gear rotates forward, a pin rotates forward about 90 degree and tangles the hook of arm-tie, be rotated further motor, this pin catches on hook and draws arm-tie and overcomes the first extension spring effect advance, and then the mobile plate hinged with arm-tie is also rotated forward around main shaft, mobile plate is away from the flange of the meeting actuating cam of cutting somebody's hair of arm-tie one end, and then the active force causing cam to overcome the first torsion spring rotates forward, and the main shaft fixing with cam also rotates forward, when cam and main shaft rotate forward about 90 degree, also 90 degree are rotated forward with the valve block that main shaft is fixing, valve body is opened, and due to the rotation of cam, the bayonet socket of cam just in time rotates to the position with the roller contraposition of rocker, rocker rotates forward under the second torsion spring effect, the roller of rocker one end snaps in the bayonet socket of cam, the side of the minor radius of the eccentric sector of the rocker the other end is engaged with the output gear of motor, and this has just entered into second state.Under this state, valve body is opened.Chain process from the first state to the second state being exactly.
Be rotated further motor, the pin tangling hook is made to continue to rotate forward a small angle, as continued rotation five degree, the hook of this pin and arm-tie is departed from completely, certainly, the relative aperture roller of bayonet socket is slightly large, and roller can have certain free gap in bayonet socket, and after such guarantee roller snaps in bayonet socket, cam and pin can also continue forward small angle rotation, after pin and hook depart from, the arm-tie losing pin hook resets to initial position under the first extension spring effect, this initial position is positioned on the movement locus of pin, when being convenient to continue to rotate forward driving gear, pin can catch on arm-tie again, realize chain process in follow-up circulation, wherein, when pin only has one, just need pin along with driving gear rotation 270 degree, but when if pin is symmetrical two, then another one pin only need rotation 90 degree just can again with arm-tie hook, therefore two pins can increase substantially cochain efficiency, but only also can realize circulation cochain with a pin, and after arm-tie reset, reset with the hinged mobile plate of arm-tie also reverse rotation, the top of mobile plate no longer contacts with the flange of cam, now, cam is no longer subject to the active force of mobile plate top, and there is the reverse trend of rotating that resets in cam under the first torsion spring effect, but the roller that this trend is snapped into cam bayonet socket stops, the 3rd state that Here it is, under this state, valve body is still opened, but arm-tie, mobile plate all resets, cam is static in the roller effect lower stress balance of the first torsion spring and rocker, and the flange of the top of mobile plate and cam departs from, like this once roller is after the disengaging of cam bayonet socket, there is the space that reverse rotation resets in cam.
When there is the condition of a fire, drive motor is rotated further, to realize one of four states.Specifically, continue the output gear rotating forward motor, and then drive eccentric sector to rotate forward, namely eccentric sector rotates from the side of minor radius to the side in more than half footpath, make the articulating point of eccentric sector and rocker from output gear the center of circle more and more away from, which achieves whole rocker and overcome the second torsion spring effect reverse rotation around rocker axle, and then make the roller of the other one end of rocker to the direction motion departing from bayonet socket, when the side that eccentric sector rotates forward the large radius of limit position and eccentric sector is engaged with output gear, roller also turns to the marginal position of bayonet socket, now just enter one of four states.The power of the second torsion spring that the power of the first torsion spring that cam is subject in this condition is subject to much larger than rocker and roller, therefore roller is released bayonet socket by cam completely, now cam no longer limits by roller, start reverse rotation to reset, and then drive the reverse reset rotation of main shaft 90 degree, make valve block reverse rotation 90 degree, valve body closes to prevent flare from channeling to other room from the room that catches fire along fire-closing valve again.When there is the condition of a fire, just in case electric motor fails, also manually-operated mode valve body can be adopted, namely plectrum is stirred around rocker axle reverse rotation with hand, the breach of plectrum stirs whole rocker along the direction reverse rotation away from cam through limit stop post, make the roller on rocker depart from the bayonet socket of cam, and then cause cam and valve block reverse rotation 90 degree, realize the manual-lock of valve body; And once after loosing one's grip, initial position is got back in the plectrum swing that can reset under the effect of the 3rd extension spring again, thus ensure that plectrum can not interfere with the follow-up cochain reseting procedure of rocker.
And after cam return, first state is just got back to again by this mechanism, rocker its roller under the second torsion spring effect props up the circumferential surface of cam again, and eccentric sector has departed from completely with the output gear of motor in roller is by the process of cam release bayonet socket, the reverse rotation and eccentric sector again resets under the second extension spring effect, namely eccentric sector rotates from large radius side to minor radius side, the minor radius side finally making eccentric sector again with output gear contraposition, like this, once after rocker again rotates forward and makes the roller of rocker snap in cam bayonet socket, the minor radius side nature of eccentric sector engages again with output gear.After coming back to first state, only need to continue drive motor, just again can open valve body by cochain, use to realize following cycle.
The actuator adopting the fire-closing valve of above structure compared with prior art, has the following advantages:
Known through above dynamic process analysis, this electric actuator only relies on the single direction rotation of motor, can realize cochain successively and open valve body, self acting stop valve body, again cochain after the condition of a fire occur opens the process recycled of valve body; And this mechanism carrys out alternative electromagnet as power source with motor completely, the stable output of motor is reliable, and output torque is large, responds to sensitive, thus make whole mechanism action fast, respond sensitive, valve body opening and closing process is smooth steadily, good operating stability.Moreover just in case after electric motor fails, this actuator can manual valve body.
Accompanying drawing explanation
Fig. 1 is the plan structure schematic diagram of actuator under first state of fire-closing valve of the present invention.
Fig. 2 is the plan structure schematic diagram of actuator under second state of fire-closing valve of the present invention.
Fig. 3 is the plan structure schematic diagram of actuator under the 3rd state of fire-closing valve of the present invention.
Fig. 4 is the plan structure schematic diagram of actuator under one of four states of fire-closing valve of the present invention.
Fig. 5 is the structural representation removed after driving gear of the actuator of fire-closing valve of the present invention.
Fig. 6 is the structural representation after the assembling of the main shaft of the actuator of fire-closing valve of the present invention, arm-tie, mobile plate and cam.
Fig. 7 is the structural representation of the rocker of the actuator of fire-closing valve of the present invention.
Fig. 8 is the rocker of the actuator of fire-closing valve of the present invention and the structural representation of plectrum.
Shown in figure 1, housing, 2, motor, 3, driving gear, 4, arm-tie, 5, mobile plate, 6, cam, 7, rocker, 8, eccentric sector, 9, gear shaft, 10, rocker axle, 11, main shaft, 12, flange, 13, output gear, 14, pin, 15, hook, 16, the first extension spring, 17, cut somebody's hair, 18, bayonet socket, 19, the first torsion spring, 20, roller, the 21, second torsion spring, 22, the second extension spring, 23, plectrum, 24, limit stop post, 25, breach, the 26, the 3rd extension spring, 27, bend section, 28, straight section, 29, draw ring.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, the actuator of fire-closing valve of the present invention, it comprises housing 1, motor 2, driving gear 3, arm-tie 4, mobile plate 5, cam 6, rocker 7, eccentric sector 8 and plectrum 23.The main shaft 11 of fire prevention fire-closing valve is through housing 1; Specifically, housing 1 is provided with through hole, and the through hole of housing 1 is stretched out in the upper end of main shaft 11.
Motor 2 is arranged on housing 1, and the output gear 13 of motor 2 engages with the driving gear 3 be rotatably arranged on housing 1, namely housing 1 is fixed with gear shaft 9, and driving gear 3 is rotatably linked on gear shaft 9 and driving gear 3 engages with output gear 13.The standard pitch circle of driving gear 3 is much larger than the standard pitch circle of output gear 13.
Driving gear 3 is provided with at least one pin 14; The present embodiment is two, the same that two pins 14 are positioned at driving gear 3 diametrically and two pins 14 with driving gear 3 distance of center circle from all equal.
Arm-tie 4 one end is provided with the hook 15 for hook pin 14, the other end of arm-tie 4 and one end of mobile plate 5 hinged, be provided with between arm-tie 4 and housing 1 two ends of the first extension spring 16, first extension spring 16 for resetting to arm-tie 4 respectively with arm-tie 4 and housing 1 fixing.
One end away from arm-tie 4 of mobile plate 5 is provided with cuts somebody's hair 17, and mobile plate 5 is rotatably linked on main shaft 11.
Cam 6 be provided with upwards for by the flange 12 of 17 promotions of cutting somebody's hair, cam 6 is fixed on main shaft 11, specifically, cam 6 and mobile plate 5 are equipped with the hole passed for main shaft 11, main shaft 11 is from the bottom up successively through cam 6 and mobile plate 5, and main shaft 11 is fixing with cam 6 as both weld but main shaft 11 and mobile plate 5 are rotatable fits.The circumferential surface of cam 6 is provided with bayonet socket 18.Be provided with the first torsion spring 19 between cam 6 and housing 1, namely the first torsion spring 19 is linked on the main shaft 11 and two ends of the first torsion spring 19 and fixes with cam 6 and housing 1 respectively.
Rocker 7 is rotatably arranged on housing 1, is provided with the second torsion spring 21 that torsion is less than the first torsion spring 19 between rocker 7 and housing 1, rocker 7 one end be provided with under the second torsion spring 21 acts on the circumferential surface of cam 6 against roller 20; Rocker 7 is fixed with epirelief in the limit stop post 24 of rocker 7.In particular, housing 1 is fixed with rocker axle 10, rocker 7 is formed by connecting by two L-shaped forks, and two fork joints form kinks, and kink is provided with through hole, and rocker axle 10 is through the through hole of kink.Second torsion spring 21 is linked on rocker axle 10, and the two ends of the second torsion spring 21 are fixed with rocker 7 and housing 1 respectively.Described limit stop post 24 is exactly the roller shaft of roller 20 in fact, and the upper surface of rocker 7 is protruded in this roller shaft upper end, thus forms limit stop post 24.
Eccentric sector 8 is hinged on one end away from roller 20 of rocker 7 and the radius of eccentric sector 8 increases progressively gradually, be provided with the second extension spring 22 for resetting to eccentric sector 8 between eccentric sector 8 and rocker 7, when roller 20 is positioned at the bayonet socket 18 of cam 6, the side of the minor radius of eccentric sector 8 is engaged with the output gear 13 of motor 2.
In particular, second extension spring 22 one end and eccentric sector 8 are fixed and that root fork of the other end and installation roller 20 is fixed, second extension spring 22 can give eccentric sector 8 one from large radius side to the trend of minor radius side reset reverse rotation all the time, make eccentric sector 8 engage with output gear 13 before the minor radius side of eccentric sector 8 and output gear 13 contraposition, after ensureing that roller 20 snaps in cam 6 bayonet socket 18, the minor radius side of eccentric sector 8 is engaged with output gear 13.
Plectrum 23 is rotatably linked on rocker axle 10 and plectrum 23 is positioned at the top of rocker 7, and plectrum 23 one end is provided with the breach 25 rotated to the direction away from cam 6 to make rocker 7 for stirring limit stop post 24; The 3rd extension spring 26 for making plectrum 23 reset is provided with between the other end of plectrum 23 and housing 1.Plectrum 23 is made up of bend section 27 and straight section 28, and bend section 27 outer end and straight section 28 the inner are fixed, and bend section 27 is linked on rocker axle 10, and breach 25 is positioned at the inner of bend section 27, and the outer end of straight section 28 is provided with the draw ring 29 being convenient to pull.
Claims (2)
1. an actuator for fire-closing valve, is characterized in that: it comprises housing (1), motor (2), driving gear (3), arm-tie (4), mobile plate (5), cam (6), rocker (7), eccentric sector (8) and plectrum (23); The main shaft (11) of fire prevention fire-closing valve is through housing (1);
Motor (2) is arranged on housing (1), and the output gear (13) of motor (2) engages with the driving gear (3) be rotatably arranged on housing (1);
Driving gear (3) is provided with at least one pin (14);
Arm-tie (4) one end is provided with the hook (15) for hook pin (14), the other end of arm-tie (4) and one end of mobile plate (5) hinged, be provided with for the first extension spring (16) of resetting of arm-tie (4) between arm-tie (4) and housing (1);
The other end of mobile plate (5) is provided with cut somebody's hair (17), and mobile plate (5) is rotatably linked on main shaft (11);
Cam (6) is provided with the flange (12) promoted for cut somebody's hair (17) upwards, cam (6) is fixed on main shaft (11), the circumferential surface of cam (6) is provided with bayonet socket (18), is provided with the first torsion spring (19) between cam (6) and housing (1);
Rocker (7) is rotatably arranged on housing (1) through rocker axle (10), the second torsion spring (21) that torsion is less than the first torsion spring (19) is provided with between rocker (7) and housing (1), rocker (7) is fixed with epirelief in the limit stop post (24) of rocker (7), the circumferential surface that rocker (7) one end is provided with and cam (6) lower in the second torsion spring (21) effect against roller (20);
Eccentric sector (8) is hinged on the other end of rocker (7) and the radius of eccentric sector (8) increases progressively gradually, be provided with the second extension spring (22) for resetting to eccentric sector (8) between eccentric sector (8) and rocker (7), when roller (20) is positioned at bayonet socket (18) of cam (6), the side of minor radius of eccentric sector (8) is engaged with the output gear (13) of motor (2);
Plectrum (23) is rotatably linked in the top that the upper and plectrum (23) of rocker axle (10) is positioned at rocker (7), and plectrum (23) one end is provided with for stirring limit stop post (24) to make rocker (7) to the breach (25) rotated away from cam (6) direction; The 3rd extension spring (26) for making plectrum (23) reset is provided with between the other end of plectrum (23) and housing (1).
2. the actuator of fire-closing valve according to claim 1, it is characterized in that: pin (14) is two, the same that two pins (14) are positioned at driving gear (3) diametrically and two pins (14) with driving gear (3) distance of center circle from all equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410476844.3A CN104265969A (en) | 2014-09-18 | 2014-09-18 | Execution mechanism of fireproof valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410476844.3A CN104265969A (en) | 2014-09-18 | 2014-09-18 | Execution mechanism of fireproof valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104265969A true CN104265969A (en) | 2015-01-07 |
Family
ID=52157523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410476844.3A Pending CN104265969A (en) | 2014-09-18 | 2014-09-18 | Execution mechanism of fireproof valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104265969A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352140A (en) * | 2016-11-09 | 2017-01-25 | 宁波凡灵风阀执行器有限公司 | Executor of full-automatic fireproof smoke exhaust valve |
| CN107228220A (en) * | 2017-07-17 | 2017-10-03 | 天津市金中基暖通净化设备有限公司 | A kind of fireproof valve executing mechanism |
| CN109404595A (en) * | 2018-12-27 | 2019-03-01 | 宁波东灵水暖空调配件有限公司 | Auomatic fixing chain formula actuating mechanism of exhaust smoke valve |
-
2014
- 2014-09-18 CN CN201410476844.3A patent/CN104265969A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352140A (en) * | 2016-11-09 | 2017-01-25 | 宁波凡灵风阀执行器有限公司 | Executor of full-automatic fireproof smoke exhaust valve |
| CN106352140B (en) * | 2016-11-09 | 2018-08-17 | 宁波凡灵风阀执行器有限公司 | A kind of actuator of full-automatic anti-fire smoke expelling valve |
| CN107228220A (en) * | 2017-07-17 | 2017-10-03 | 天津市金中基暖通净化设备有限公司 | A kind of fireproof valve executing mechanism |
| CN107228220B (en) * | 2017-07-17 | 2023-09-01 | 天津市金中基暖通净化设备有限公司 | Fire prevention valve actuating mechanism |
| CN109404595A (en) * | 2018-12-27 | 2019-03-01 | 宁波东灵水暖空调配件有限公司 | Auomatic fixing chain formula actuating mechanism of exhaust smoke valve |
| CN109404595B (en) * | 2018-12-27 | 2024-01-12 | 宁波东灵水暖空调配件有限公司 | Automatic upper chain type smoke exhaust valve actuating mechanism |
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| PB01 | Publication | ||
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Application publication date: 20150107 |