CN202646860U - Motor-driven smoke discharging fire resisting valve and motor-driven smoke discharging fire resisting system - Google Patents
Motor-driven smoke discharging fire resisting valve and motor-driven smoke discharging fire resisting system Download PDFInfo
- Publication number
- CN202646860U CN202646860U CN 201220280751 CN201220280751U CN202646860U CN 202646860 U CN202646860 U CN 202646860U CN 201220280751 CN201220280751 CN 201220280751 CN 201220280751 U CN201220280751 U CN 201220280751U CN 202646860 U CN202646860 U CN 202646860U
- Authority
- CN
- China
- Prior art keywords
- electronic smoke
- gear
- exhaust fire
- control box
- fire damper
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Air-Flow Control Members (AREA)
Abstract
The utility model relates to the field of fire fighting apparatuses, particularly relates to a motor-driven smoke discharging fire resisting valve and a motor-driven smoke discharging fire resisting system, and the motor-driven smoke discharging fire resisting valve and the motor-driven smoke discharging fire resisting system can achieve accuracy control of a blade. A motor is connected with one end of a flexible arm and drives the flexible arm to rotate. The other end of the flexible arm is connected with one end of a connecting rod piece in a rotating mode. A toothed bar is provided with a connecting shaft. The other end of the connecting rod piece is connected with the connecting shaft in a rotating mode. The toothed bar is meshed with a first gear. The first gear is meshed with a second gear. The second gear is connected with the blade through a connecting piece and drives the blade to rotate, and a central shaft of the connecting piece is parallel with a central shaft of the blade. The motor-driven smoke discharging fire resisting system and a remote control center are connected with a temperature sensor and a smoke sensor through a control box. The remote control center acquires temperature valves and smog concentration through the control box, judges acquired information, and controls on and off of the motor-driven smoke discharging fire resisting valve through the control box.
Description
Technical field
The utility model relates to the fire-protection equipment field, is specifically related to a kind of electronic smoke exhaust fire damper and electronic smoke-exhaust fire system.
Background technique
At present, the electronic smoke exhaust fire damper that industry and hotel, hotel use generally is installed on the pipeline of mechanical smoke extraction system, be at ordinary times opening state, close electronic smoke exhaust fire damper during fire, satisfy within a certain period of time and leak cigarette amount and refractory nature requirement, play every the effect of cigarette back-fire relief.
In the prior art, electronic smoke exhaust fire damper comprises spring and the electromagnet that is oppositely arranged with described spring, be provided with spool between described spring and the described electromagnet, and described spring is connected with described electromagnet, and described spool is connected with described blade by gear and the link that is arranged on the gear.When needs are closed electronic smoke exhaust fire damper, utilize the DC24V(of control centre direct current 24V) to the electromagnet energising, electromagnet produces electromagnetic force, spool overcomes the elastic force of spring, moves to the electromagnet direction, and drives described gear rotation, closely drive described blade rotation, thereby close described pipeline.When needs are opened electronic smoke exhaust fire damper, utilize the DC24V of control centre to interrupt the power supply of electromagnet, electromagnet does not produce electromagnetic force, spool moves to the spring direction under the effect of the elastic force of spring, and drives described gear rotation, closely drive described blade rotation, thereby open described pipeline.
The area of the iron core of coil turn, size of current and electromagnet that the size of electromagnetic force is outer with being wrapped in electromagnet is relevant, and be subjected to prior art and the restriction in the space of electronic smoke exhaust fire damper is set, electromagnetic force can be very not large, so the elastic force of spring correspondingly can be very not large yet, and strength is too little, just be not enough to overcome the mechanical force acting, blade just may not arrive preposition, thereby can not realize the accurate control of leaf position.
The model utility content
Embodiment of the present utility model provides a kind of electronic smoke exhaust fire damper and electronic smoke-exhaust fire system, can realize that the essence of blade is but controlled.
Electronic smoke exhaust fire damper comprises blade, link, the first gear, tooth bar, motor, scratches arm and connecting rod piece;
Described motor is connected with a described end of scratching arm, and drives its rotation; Describedly scratch the other end of arm and an end of described connecting rod piece is rotationally connected, described tooth bar is provided with coupling shaft, and the other end of described connecting rod piece and described coupling shaft are rotationally connected;
Described tooth bar and the engagement of described the first gear;
Described the first gear and the engagement of described the second gear, described the second gear is crossed described link with described blade pass and is connected, and drives described blade rotation, and the central axes of the central shaft of described link and described blade.
Preferably, described the second gear has two, is separately positioned on the both sides of described the first gear, and described link and described blade also all have two, and each described second gear is connected with a described blade by a described link respectively.
Preferably, the line at the center of two described the second gears is parallel to the length direction of described tooth bar.
Preferably, the diameter of described the first gear is greater than the diameter of described the second gear.
Preferably, the two ends of described tooth bar are equipped with the tooth bar seat that moves along the direction perpendicular to its length be used to limiting described tooth bar.
Preferably, also comprise be used to limiting two limit components of described tooth bar along the displacement distance of its length direction.
Electronic smoke-exhaust fire system comprises above-mentioned any one electronic smoke exhaust fire damper.
Preferably, also comprise remote control center, control box and temperature sensor;
Described remote control center is connected with described temperature sensor by described control box;
Described temperature sensor is used for: obtain the interior temperature value of gas exhaust duct at described electronic smoke exhaust fire damper place, and described temperature value is sent to described control box;
Described control box is used for: receive the temperature value that described temperature sensor sends, and described temperature value is sent to described remote control center; Receive the control command that described control centre sends, and be sent to described electronic smoke exhaust fire damper;
Described remote control center is used for: receive the temperature value that described control box sends; Described temperature value and predefined value are compared, if described temperature value surpasses described predefined value, send the control command that described electronic smoke exhaust fire damper is closed to described control box.
Preferably, also comprise smoke detector;
Described remote control center is connected with described smoke detector by described control box;
Described smoke detector is used for: obtain the interior smokescope of gas exhaust duct at described electronic smoke exhaust fire damper place, and described smokescope is sent to described control box;
Described control box is further used for: receive the smokescope that described smoke detector sends, and described smokescope is sent to described remote control center; Receive described control command, and be sent to described electronic smoke exhaust fire damper;
Described remote control center is further used for: receive the smokescope that described control box sends; Described smokescope and normal smokescope are compared, if described smokescope surpasses described normal smokescope, send the control command that described electronic smoke exhaust fire damper is closed to described control box.
Preferably, also comprise warning device, described warning device is connected with described remote control center,
Described remote control center is further used for: when described temperature value surpasses normal value, send alarm command to described warning device;
Described warning device is used for: receive described alarm command, and report to the police.
The electronic smoke exhaust fire damper that embodiment of the present utility model provides, described motor is connected with a described end of scratching arm, describedly scratch the other end of arm and an end of described connecting rod piece is rotationally connected, described tooth bar is provided with coupling shaft, and the other end of described connecting rod piece and described coupling shaft are rotationally connected; Described tooth bar and the engagement of described the first gear; Described the first gear and the engagement of described the second gear, described the second gear is crossed described link with described blade pass and is connected, control the switching of described electronic smoke exhaust fire damper by motor, since motor larger, more stable strength can be provided, so can control the rotation of blade more accurately.
And electronic smoke-exhaust fire of the present utility model system can realize by remote control center the Kai Heguan of the electronic smoke exhaust fire damper of telecontrol, makes operator away from the scene of a fire, ensured operator's safety.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, below will discuss the accompanying drawing of required use in embodiment or the description of the Prior Art, obviously, only be embodiments more of the present utility model in the technological scheme that is described by reference to the accompanying drawings, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawing illustrated embodiments other embodiment and accompanying drawing thereof.
Fig. 1 is the plan view according to the electronic smoke exhaust fire damper of specific embodiment of the utility model 1;
Fig. 2 is the plan view according to the electronic smoke exhaust fire damper of specific embodiment of the utility model 1;
Fig. 3 is the structural drawing according to the electronic smoke-exhaust fire system of specific embodiment of the utility model 2.
Description of drawings: the 1-motor, the 2-transmission shaft, 3-scratches arm, the 4-connecting rod piece, the 5-pin, 6-tooth bar seat, 7-the first gear, 8-the second gear, 9-tooth bar, 10-coupling shaft, the 11-link, 12-blade, 13-limit component, the electronic smoke exhaust fire damper of 14-, 15-temperature sensor, 16-control box, the 17-remote control center, 18-warning device, 19-smoke detector.
Embodiment
Below with reference to accompanying drawing each embodiment's of the present utility model technological scheme is carried out clear, complete description, obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiments.Based on the embodiment described in the utility model, those of ordinary skills are resulting all other embodiments under the prerequisite that does not need creative work, all in the scope that the utility model is protected.
Electronic smoke exhaust fire damper of the present utility model comprises blade, link, the first gear, tooth bar, motor, scratches arm and connecting rod piece;
Described motor is connected with a described end of scratching arm, and drives its rotation; Describedly scratch the other end of arm and an end of described connecting rod piece is rotationally connected, described tooth bar is provided with coupling shaft, and the other end of described connecting rod piece and described coupling shaft are rotationally connected;
Described tooth bar and the engagement of described the first gear;
Described the first gear and the engagement of described the second gear, described the second gear is crossed described link with described blade pass and is connected, and drives described blade rotation, and the central axes of the central shaft of described link and described blade.
A described end of scratching arm is fixed on the described motor, and the described the other end of scratching arm also is to be connected by pin with an end of described connecting sheet.The other end of described connecting sheet is connected by pin with described tooth bar
Electronic smoke exhaust fire damper of the present utility model and electronic smoke-exhaust fire system, blade pass is crossed link, the first gear, the second gear, tooth bar, connecting sheet and is connected arm and is connected with motor, control the switching that motor is controlled described electronic smoke exhaust fire damper by remote control center, can realize that the essence of blade is but controlled.
As preferred implementation, described the second gear has two, is separately positioned on the both sides of described the first gear, and described link and described blade also all have two, and each described second gear is connected with a described blade by a described link respectively.By two blades are set, can better close gas exhaust duct, realize better sealing.
As preferred implementation, the line at the center of two described the second gears is parallel to the length direction of described tooth bar., by the second gear is set, by the cooperate transmission of the first gear with the second gear, drives described blade and rotate, make the moving range of tooth bar shorter, can realize better transmission effect simultaneously.
As preferred implementation, the diameter of described the first gear is greater than the diameter of described the second gear.Can increase like this strength of second gear that drives, make positioning control more accurate.
As preferred implementation, the two ends of described tooth bar are equipped with the tooth bar seat that moves along the direction perpendicular to its length be used to limiting described tooth bar.The neutral position of described tooth bar seat is that a through hole is arranged, and described tooth bar passes described through hole, can limit tooth bar by described tooth bar seat and only move along the direction perpendicular to its length, can not swing, and makes transmission more stable.
As preferred implementation, also comprise be used to limiting two limit components of described tooth bar along the displacement distance of its length direction.Described limit component is bulk or strip, and described limit component piece is separately positioned on the outside of described tooth bar seat, is used for limiting described tooth bar along the displacement distance of its length direction.
Electronic smoke-exhaust fire system comprises the described electronic smoke exhaust fire damper of above-mentioned any one mode of execution.
As preferred implementation, also comprise remote control center, control box and temperature sensor;
Described remote control center is connected with described temperature sensor by described control box;
Described temperature sensor is used for: obtain the interior temperature value of gas exhaust duct at described electronic smoke exhaust fire damper place, and described temperature value is sent to described control box;
Described control box is used for: receive the temperature value that described temperature sensor sends, and described temperature value is sent to described remote control center; Receive the control command that described control centre sends, and be sent to described electronic smoke exhaust fire damper;
Described remote control center is used for: receive the temperature value that described control box sends; Described temperature value and predefined value are compared, if described temperature value surpasses described predefined value, send the control command that described electronic smoke exhaust fire damper is closed to described control box.
Electronic smoke-exhaust fire of the present utility model system, obtain temperature value in the gas exhaust duct by temperature sensor, and described temperature value is sent to described remote control center by described control box, described remote control center compares described temperature value and predefined value, if described temperature value surpasses described predefined value, send the control command that described electronic smoke exhaust fire damper is closed to described control box, described electronic smoke exhaust fire damper is closed.
As preferred implementation, also comprise smoke detector;
Described remote control center is connected with described smoke detector by described control box;
Described smoke detector is used for: obtain the interior smokescope of gas exhaust duct at described electronic smoke exhaust fire damper place, and described smokescope is sent to described control box;
Described control box is further used for: receive the smokescope that described smoke detector sends, and described smokescope is sent to described remote control center; Receive described control command, and be sent to described electronic smoke exhaust fire damper;
Described remote control center is further used for: receive the smokescope that described control box sends; Described smokescope and normal smokescope are compared, if described smokescope surpasses described normal smokescope, send the control command that described electronic smoke exhaust fire damper is closed to described control box.
Electronic smoke-exhaust fire of the present utility model system, obtain smokescope in the gas exhaust duct by smoke detector, and smokescope is sent to described remote control center by described control box, described remote control center compares smokescope and described normal smokescope, if smokescope surpasses normal smokescope, send the control command that described electronic smoke exhaust fire damper is closed to described control box, described electronic smoke exhaust fire damper is closed.
As preferred implementation, also comprise warning device, described warning device is connected with described remote control center;
Described remote control center is further used for: when described temperature value surpasses normal value, send alarm command to described warning device;
Described warning device is used for: receive described alarm command, and report to the police.
Specific embodiment 1
As illustrated in fig. 1 and 2, electronic smoke exhaust fire damper, described motor 1 is connected with a described end of scratching arm 3 by transmission shaft 2, and drives its rotation; The described the other end of scratching arm 3 is connected by pin 5 with an end of described connecting rod piece 4, and described tooth bar is provided with coupling shaft 10, and the other end of described connecting rod piece 4 and described coupling shaft 10 are rotationally connected; Described tooth bar 9 and 7 engagements of described the first gear; Described the first gear 7 and 8 engagements of described the second gear, described the second gear 8 has two, be separately positioned on the both sides of described the first gear 7, described link 11 and described blade also all have two, and each described second gear 8 is connected with a described blade 12 by a described link 11 respectively.The line at the center of two described the second gears is parallel to the length direction of described tooth bar.The diameter of described the first gear is greater than the diameter of described the second gear.
The two ends of described tooth bar 9 are equipped with the tooth bar seat 6 that moves along the direction perpendicular to its length be used to limiting described tooth bar.The outside of each described tooth bar seat 6 is provided with one and is used for limiting described tooth bar along the limit component 13 of the displacement distance of its length direction.
Specific embodiment 2
As shown in Figure 3, electronic smoke-exhaust fire system comprises remote control center 17, control box 16, temperature sensor 15 and electronic smoke exhaust fire damper 14;
Described remote control center 17 is connected with described temperature sensor 15 by described control box 16;
Described temperature sensor 15 is used for: obtain the interior temperature value of gas exhaust duct at described electronic smoke exhaust fire damper place, and described temperature value is sent to described control box;
Described control box 16 is used for: receive the temperature value that described temperature sensor sends, and described temperature value is sent to described remote control center; Receive the control command that described control centre sends, and be sent to described electronic smoke exhaust fire damper;
Described remote control center 17 is used for: receive the temperature value that described control box sends; Described temperature value and predefined value are compared, if described temperature value surpasses described predefined value, send the control command that described electronic smoke exhaust fire damper is closed to described control box.
Also comprise smoke detector 19; Described remote control center is connected with described smoke detector by described control box;
Described smoke detector 19 is used for: obtain the interior smokescope of gas exhaust duct at described electronic smoke exhaust fire damper place, and described smokescope is sent to described control box;
Described control box 16 is further used for: receive the smokescope that described smoke detector sends, and described smokescope is sent to described remote control center; Receive described control command, and be sent to described electronic smoke exhaust fire damper;
Described remote control center 17 is further used for: receive the smokescope that described control box sends; Described smokescope and normal smokescope are compared, if described smokescope surpasses described normal smokescope, send the control command that described electronic smoke exhaust fire damper is closed to described control box.
Also comprise warning device 18, described warning device is connected with described remote control center,
Described remote control center 17 is further used for: when described temperature value surpasses normal value, send alarm command to described warning device; Described warning device is used for: receive described alarm command, and report to the police.
The various embodiments that the utility model provides can be as required in any way mutually combination, the technological scheme that obtains by this combination is also in scope of the present utility model.
Obviously, in the situation that does not break away from spirit and scope of the present utility model, those skilled in the art can carry out various changes and modification to the utility model.Like this, if these changes of the present utility model and modification are belonged within the scope of the utility model claim and equivalent thereof, then the utility model also will comprise these changes and modification.
Claims (10)
1. electronic smoke exhaust fire damper is characterized in that, comprises blade, link, the first gear, tooth bar, motor, scratches arm and connecting rod piece;
Described motor is connected with a described end of scratching arm, and drives its rotation; Describedly scratch the other end of arm and an end of described connecting rod piece is rotationally connected, described tooth bar is provided with coupling shaft, and the other end of described connecting rod piece and described coupling shaft are rotationally connected;
Described tooth bar and the engagement of described the first gear;
Described the first gear and the engagement of described the second gear, described the second gear is crossed described link with described blade pass and is connected, and drives described blade rotation, and the central axes of the central shaft of described link and described blade.
2. electronic smoke exhaust fire damper as claimed in claim 1, it is characterized in that, described the second gear has two, be separately positioned on the both sides of described the first gear, described link and described blade also all have two, and each described second gear is connected with a described blade by a described link respectively.
3. electronic smoke exhaust fire damper as claimed in claim 2 is characterized in that, the line at the center of two described the second gears is parallel to the length direction of described tooth bar.
4. such as the described electronic smoke exhaust fire damper of claim 1-3 any one, it is characterized in that the diameter of described the first gear is greater than the diameter of described the second gear.
5. electronic smoke exhaust fire damper as claimed in claim 4 is characterized in that, the two ends of described tooth bar are equipped with the tooth bar seat that moves along the direction perpendicular to its length be used to limiting described tooth bar.
6. electronic smoke exhaust fire damper as claimed in claim 4 is characterized in that, also comprises be used to limiting two limit components of described tooth bar along the displacement distance of its length direction.
7. electronic smoke-exhaust fire system is characterized in that, comprises the described electronic smoke exhaust fire damper of claim 1-6 any one.
8. electronic smoke-exhaust fire as claimed in claim 7 system is characterized in that,
Also comprise remote control center, control box and temperature sensor;
Described remote control center is connected with described temperature sensor by described control box;
Described temperature sensor is used for: obtain the interior temperature value of gas exhaust duct at described electronic smoke exhaust fire damper place, and described temperature value is sent to described control box;
Described control box is used for: receive the temperature value that described temperature sensor sends, and described temperature value is sent to described remote control center; Receive the control command that described control centre sends, and be sent to described electronic smoke exhaust fire damper;
Described remote control center is used for: receive the temperature value that described control box sends; Described temperature value and predefined value are compared, if described temperature value surpasses described predefined value, send the control command that described electronic smoke exhaust fire damper is closed to described control box.
9. electronic smoke-exhaust fire as claimed in claim 8 system is characterized in that, also comprises smoke detector;
Described remote control center is connected with described smoke detector by described control box;
Described smoke detector is used for: obtain the interior smokescope of gas exhaust duct at described electronic smoke exhaust fire damper place, and described smokescope is sent to described control box;
Described control box is further used for: receive the smokescope that described smoke detector sends, and described smokescope is sent to described remote control center; Receive described control command, and be sent to described electronic smoke exhaust fire damper;
Described remote control center is further used for: receive the smokescope that described control box sends; Described smokescope and normal smokescope are compared, if described smokescope surpasses described normal smokescope, send the control command that described electronic smoke exhaust fire damper is closed to described control box.
10. electronic smoke-exhaust fire valve system as claimed in claim 9 is characterized in that,
Also comprise warning device, described warning device is connected with described remote control center,
Described remote control center is further used for: when described temperature value surpasses normal value, send alarm command to described warning device;
Described warning device is used for: receive described alarm command, and report to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220280751 CN202646860U (en) | 2012-06-14 | 2012-06-14 | Motor-driven smoke discharging fire resisting valve and motor-driven smoke discharging fire resisting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220280751 CN202646860U (en) | 2012-06-14 | 2012-06-14 | Motor-driven smoke discharging fire resisting valve and motor-driven smoke discharging fire resisting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202646860U true CN202646860U (en) | 2013-01-02 |
Family
ID=47415969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220280751 Expired - Fee Related CN202646860U (en) | 2012-06-14 | 2012-06-14 | Motor-driven smoke discharging fire resisting valve and motor-driven smoke discharging fire resisting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202646860U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942845A (en) * | 2018-01-11 | 2018-04-20 | 李雪梅 | A kind of SCM Based intelligent fireproof actuator for smoke exhausting valve control system |
| CN108111633A (en) * | 2018-02-08 | 2018-06-01 | 江苏智科消防科技有限公司 | A kind of wisdom formula smoke controlling valve remote monitoring system based on Internet of Things |
| CN108317257A (en) * | 2018-03-29 | 2018-07-24 | 广西百盛通风设备科技有限公司 | A kind of structure-improved of fire resisting damper |
| CN109569133A (en) * | 2018-11-30 | 2019-04-05 | 李珊珍 | Soot blower noise canceling system |
-
2012
- 2012-06-14 CN CN 201220280751 patent/CN202646860U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942845A (en) * | 2018-01-11 | 2018-04-20 | 李雪梅 | A kind of SCM Based intelligent fireproof actuator for smoke exhausting valve control system |
| CN108111633A (en) * | 2018-02-08 | 2018-06-01 | 江苏智科消防科技有限公司 | A kind of wisdom formula smoke controlling valve remote monitoring system based on Internet of Things |
| CN108317257A (en) * | 2018-03-29 | 2018-07-24 | 广西百盛通风设备科技有限公司 | A kind of structure-improved of fire resisting damper |
| CN108317257B (en) * | 2018-03-29 | 2024-03-26 | 广西百盛通风设备科技有限公司 | Improved structure of fire-proof valve |
| CN109569133A (en) * | 2018-11-30 | 2019-04-05 | 李珊珍 | Soot blower noise canceling system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202646860U (en) | Motor-driven smoke discharging fire resisting valve and motor-driven smoke discharging fire resisting system | |
| CN203757120U (en) | Electric reset smoke-exhaust and fireproof valve mechanism | |
| CN110131436A (en) | A kind of fire prevention blocked valve with from fuse function and convenient for operating | |
| CN201687693U (en) | Vehicle-used firefighting pump control device with functions of feedback and pressure regulation | |
| CN206190997U (en) | Executor is closely controlled to fire prevention smoke damper | |
| CN205663951U (en) | Fireproof smoke exhaust valve | |
| CN202812239U (en) | Electric counter weight butterfly valve | |
| CN206342825U (en) | A kind of automatic-opening mechanism of fire extinguisher | |
| CN206682393U (en) | Quick electric closes valve circuit device | |
| CN210531718U (en) | Full-automatic remote opening and closing reset driving device | |
| CN204002273U (en) | A kind of remote control pneumatic vent window | |
| CN205525035U (en) | Unmanned aerial vehicle testing arrangement | |
| CN205558625U (en) | Automatic ventilation unit of passenger train vehicle | |
| CN101216148B (en) | Coal gas explosion-proof rapid purging device | |
| CN200955616Y (en) | Multifunction smoke-proof valve device | |
| CN208985356U (en) | A kind of energy saving and environment friendly novel and multifunctional control cabinet used for transformer and distribution power station | |
| CN205654925U (en) | One -way hypervelocity shut -off valve of manual electronic two accuse overhead paddle | |
| CN204533705U (en) | A kind of family expenses anti-explosion gas emergency cut-off calutron | |
| CN202699919U (en) | Fire preventing device capable of automatically closing gas flues and air ducts | |
| CN203051880U (en) | Fireproof regulating valve | |
| CN102444781A (en) | Constant-force gas bottle closing system | |
| EP0154089A2 (en) | Damper | |
| CN219531080U (en) | Fresh air system shell | |
| CN203309260U (en) | Fire resisting damper capable of being automatically closed | |
| CN204042027U (en) | A kind of valve magnetic control gravity emergency driving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20140614 |
|
| EXPY | Termination of patent right or utility model |