387 results about "Fire damper" patented technology

A trim assembly for a fire protection system valve includes a mounting member and a piping assembly supported by the mounting member. The piping assembly includes a priming line with an inlet for receiving priming fluid from a fire suppressant fluid supply line and an outlet for delivering priming fluid to a priming chamber of the fire protection system valve. The inlet and the outlet are provided at the mounting member. The piping assembly also includes a component, which responsive to a control signal and / or a pressure differential. The component redirects priming fluid away from the outlet of the priming line in response to the control signal and / or the pressure differential for controlling the delivering of priming fluid to the priming chamber of the fire protection system valve. The piping assembly further includes a discharge outlet, with the priming line discharging the priming fluid to the discharge outlet when the component directs priming fluid away from the outlet of the priming line, which is preferably provided at the mounting member.

The invention discloses a check fire valve for a flue, comprising a lampblack channel comprising an outer casing. The lampblack channel is provided with an air inlet and an air outlet which are opposite to each other; two oppositely arranged valve plates are arranged in the lampblack channel; and are rotatablely arranged in the lampblack channel through a valve plate rotation shaft; a blocking body causing the two valve plates only to be opened towards the direction of the air outlet is arranged at one end near the air inlet in the lampblack channel; a connecting strip lengthways arranged to separate the air inlet to two parts is arranged at the side near the air inlet in the lampblack channel; the valve plate rotation shaft is arranged close to the connecting strip; and the side face of the connecting strip facing to the air outlet is provided with a high-temperature closing device which can enable the valve plates to be forcibly closed. The invention has good lampblack removing effect, can not impede the smoothness of public flues, and can be forcibly closed when temperature of flue gas in the public flues is in a high exigent condition.

The invention relates to a heating control method of an air conditioner. The method comprises the following steps of powering on the air conditioner, and entering a heating mode; adopting an outdoor machine to detect an outdoor ambient temperature T3, and adopting an indoor machine to detect an indoor ambient temperature T1; enabling an air damper and an air guide angle of the indoor machine to be operated according to the setting of a user or to be operated according to a preset value, and enabling the air damper and the air guide angle of the indoor machine to be operated in priority according to a cold-air preventing mode if the cold-air preventing mode is needed; enabling an indoor fan to enter a high-air running mode if T3A is more than T3 and T1 is more than T1A, and adopting a cold-air preventing angle mode for an air guide angle of the indoor fan; withdrawing from the high-air running mode, and enabling the air conditioner to run the air damper according to a normal cold-air preventing mode; and enabling the air conditioner to enter a set air mode according to the normal cold-air preventing mode if T3 is less than T3A and T1 is more than T1A. By adjusting the operation mode of the air conditioner, the thickness of an oil membrane of a running part of a compressor can be efficiently increased, the thickness and viscosity of the oil membrane of the air conditioner under a worst working condition can be guaranteed, the reliability of the compressor is improved, and the operation reliability of the air conditioner can be guaranteed.

A gas flow interrupter for a gas meter, the interrupter comprising a valve member that is movable relative to a valve seat which defines an opening for passing said gas flow, said valve member comprising firstly a membrane having a main surface including a "contact zone" portion that comes into contact with said valve seat when the interrupter is in its closed position, thereby closing said opening by means of the main surface of the valve member, and secondly a part that forms a mechanical support for the membrane and that co-operates with said membrane, wherein the metal part forming a support for the membrane has a continuous leakproof surface bounded by the contact zone so as to close the opening in the event of the membrane failing to provide sealing.

A pneumatic fuel distributor for solid fuel boilers is described incorporating in various embodiments one or more of the following features: a converging nozzle section, a converging adjustable orifice section and an integral trajectory plate. The nozzle, orifice and trajectory plate are preferably all interconnected and rotate together about a common axis. The orifice damper is, in one embodiment, a rotating convergent section and independently adjustable. The unit preferably incorporates a viewing glass and access port and the rotating components are preferably removable for maintenance. The unit is preferably reversible for left or right hand installation and the trajectory plate is easily replaceable.

The invention discloses a ventilation, smoke discharge and evacuation system for an underwater single-tube double-layer shield traffic tunnel. The ventilation, smoke discharge and evacuation system comprises an upper-layer lane, a lower-layer lane, a jet fan and a wind tower. An axial flow fan is arranged in the wind tower. A sector space on one side face of a round shield section of the tunnel is an independent smoke discharge channel. An escape channel is arranged in a sector space on the other side of the round shield section of the tunnel. A staircase connected with the upper layer and the lower layer is arranged in the escape channel. An upper-layer front room is arranged between the staircase and a lower-layer escape door. A lower-layer front room is arranged between the staircase and an upper-layer escape door. Positive pressure fans are installed on the wall shared by the upper-layer front room and the staircase and the wall shared by the lower-layer front room and the staircase respectively. The upper end of the side wall of the tunnel is provided with an upper-layer smoke outlet and a lower-layer smoke outlet. The upper-layer smoke outlet and the lower-layer smoke outlet are respectively provided with an automatic smoke discharge fire damper. By means of the ventilation, smoke discharge and evacuation system, fire smoke can not diffuse between the upper layer and the lower layer, the visibility of the escape environment is good, the escape environment is not invaded by the smoke, personnel evacuation is efficient and quick, escape time is greatly shortened, personnel casualties are reduced, construction is safe, and later-period maintenance is easy.

A fire containment and monitoring system includes a control system that communicates with a fire protection system and an array of alarms, smoke detectors, heat detectors, ventilation dampers, fire dampers, fire doors, and manual call points. The system has particular usefulness for kitchens onboard watercraft, especially large ships, where fire containment is critical to the survivability of the vessel, passengers, crew, and cargo. The control system communicates with the alarms, smoke detectors, heat detectors, ventilation dampers, fire dampers, fire doors, manual call points, and fire protection system, and it initiates a comprehensive list of actions if a smoke detector, a heat detector, or a manual call point is triggered within the monitoring portion of the system.

The invention relates to a control equipment for a vehicle. In an embodiment method of the invention, when returning from the neutral control, an air damper is slowly opened unrelated to the rolling reduction of the accelerator pedal by drivers from the return of the neutral control after the delayed time, thereby restraining the early increase of the motor torque. Besides, the braking pressure is smoothly released from the neutral control return after the delayed time. By the method, the environment (opening of the air damper, braking pressure) returning from the neutral control is suitably set considering the joint of the forward clutch, thereby restraining the impact when returning from the neutral control.

The invention relates to an energy-saving safe and intelligent combined type accurate constant temperature and humandity equipment cabinet which is placed on the ground of a machine room as a special equipment cabinet. The energy-saving safe and intelligent combined type accurate constant temperature and humandity equipment cabinet comprises an equipment cabinet body, an air conditioner main air supply pipe, more than one air conditioner branch air pipe, a fire-fighting air bottle, an extinguishing air intake pipe, an air supply fan, an air return fan, a smoke venting fire resisting damper and an intelligent control system, wherein the air conditioner main air supply pipe is connected with an air conditioner and the equipment cabinet body; the air conditioner branch air pipe is arranged between the air conditioner main air supply pipe and the equipment cabinet body; the fire-fighting air bottle is arranged on the equipment cabinet body and is stored with inerta extinguish gas; the extinguishing air intake pipe is arranged between the fire-fighting air bottle and the equipment cabinet body; the air supply fan is arranged under the equipment cabinet body; the air return fan is arranged above the equipment cabinet body; the smoke venting fire resisting damper is arranged above the air return fan; and the intelligent control system is used for controlling the constant temperature and humadity in the equipment cabinet accurately and fire-fighting and extinguishing. The realization of accurate cool air supply enables the power sonsumption of the air conditioner equipment in a large scale data center to decrease greatly, and energy resources are saved.

The invention provides a manufacturing method of integrated square fire-resisting damper valve buckle body molding, comprising the following process steps: carrying out blanking on a complete board with a plate shearing machine according to the ordered size of the valve body and cutting into a rectangular panel veneer; carrying out working procedure processing like corner cutting, notching, punching and the like on the panel veneer with a press tool; performing bending operation of the flange edge at the two sides of the panel veneer with a bending machine; carrying out molding operation on the square frame body with a valve body molding device; and finally adopting welding or riveting operation at the seam position to finish the processing of the valve body frame body in the end. The invention has the following advantages: the method only needs shearing the board once, and the manufacturing can be completed through press working; compared with the current board-shearing and tailor welding four times, the method in the invention leaves out a plurality of working hours and reduces the disadvantages of size deformation; the total processing time of the frame body can be saved by 59.5%, thus the cost of the valve body is substantially lowered; the integrated board is under press working with almost no deformation; and welding is only carried out on the joint at one side, and the generated air leakage rate of the weld porosity is reduced to 25% of the original air leakage rate.

The invention discloses an entire-underground cable tunnel safety manhole being used also as a ventilation shaft, which pertains to the technical field of power supply and distribution circuits and comprises an underground firewall with a door, an aboveground firewall, a fire door, a propeller fan, a fire damper, a safety manhole, a vertical ladder, a stair hall, a sump pit and a dredge pump; wherein the safety manhole is also used as a ventilation shaft and adopts an entire-underground type. The entire-underground cable tunnel safety manhole has the advantages that: as the internal structure of the ventilation shaft is optimized, the requirements of ventilation, drainage, fire prevention and routing inspection of the cable tunnel are satisfied, and the entire structure of the ventilation shaft is arranged underground, thus solving the problem of the overall beautiful appearance of a factory and effectively reducing the construction cost. The channel and the ventilation opening of the ventilation shaft are integrated into one, thus being capable of being flexibly arranged without affecting the arrangement of other facilities on the ground in the factory district.

Automatic fire extinguishing equipment of a fume hood includes a cabinet having a workbench, a vent pipe, and ventilation equipment. In front of the cabinet is a window panel. Top rim of the workbench has first and second detection elements, and automatic fire extinguishing equipment mechanisms. The ventilation equipment contains a fire damper. When fire occurs at the workbench from experiments, the first detection element detects a fire signal first to issue alarming sound (or alerting flash) promptly, the ventilation equipment shutdowns, with the fire damper closed for closing the vent pipe. When the second detection element detects a smoke or high temperature signal, the window panel is closed, with the automatic fire extinguishing equipment mechanisms activated automatically to terminate flame, thereby preventing thick smoke or flame from channeling into the vent pipe to spread the fire, and preventing the fume hood from starting a cascade of fire.

The present invention may be embodied as a biofuel heating system for converting biofuel to heat energy to be delivered to a load comprising a combustion chamber defining a combustion zone, an under-fire zone, and an over-fire zone. A controller operates at least one of a fan, an under-fire damper, and an over-fire damper based on at least one operating parameter such that air flows along a flow path extending from at least one of an under-fire port and an over-fire port, through the combustion chamber, through a burn-out port, through a burn-out chamber, through a heat exchange port, through a heat exchange chamber, and out of an exhaust port. The heat exchange system transfers heat energy from air flowing through the heat exchange chamber to the working fluid.

The invention discloses a squeeze film damper, which comprises an oil inlet groove, air feed holes, oil film lines and oil storage holes. The oil inlet groove is machined on an outer circle of the squeeze film damper. The oil feed holes are machined in the oil inlet groove and communicated with the oil film lines, and supply oil to the oil film lines. The oil film lines are machined on the supporting circumference of the squeeze film damper, are slit machined on the supporting circumference of the squeeze film damper, and comprise outer lines I, inner lines III and middle line groups between the outer lines I and the inner lines III, wherein each middle line group comprises a plurality of middle lines II, which are nested and not communicated; and every two adjacent middle line groups are communicated through an inner line III. The oil storage holes are axial through holes, and are distributed in the oil film lines. The squeeze film damper is simple in structure, convenient to machine, low in cost, easy to mount and applicable to the vibration reduction of a 2-0-0 type rotor support structure, and has broad application prospect for miniature rotary type power machinery.

The invention discloses a nitrogen automatic fire fighting system for a sealed cable tunnel. The system comprises the sealed cable tunnel which is provided with an air vent, wherein the air vent is provided with a ventilating device and a fire valve; the cable tunnel is internally provided with a temperature sensor; the temperature sensor is electrically connected with an alarm controller; a nitrogen spraying pipeline penetrates through the cable tunnel; nitrogen spraying devices are distributed on the nitrogen spraying pipeline; the nitrogen spraying pipeline is communicated with a nitrogen delivery pipeline which is communicated with a nitrogen source; the nitrogen delivery pipeline is connected with a nitrogen release valve in series; and the nitrogen release valve is electrically connected with the alarm controller. The fire fighting system can be used for rapidly and effectively extinguishing cable fire hazards. By utilizing the fire fighting system, electrical hazards such as grounding, short circuit and shotfiring cannot occur, the purpose of safely extinguishing fire is achieved, the purpose of cleanly extinguishing fire is also achieved, an complex operation of cleaning superfine dry powder for a long time is omitted, and power supply can be rapidly recovered.

A fire collar or fire damper for location within a concrete slab of a building. The device incorporates a damper arrangement (12) and a heat detector (18, 19) comprising a metal alloy or lead which melts when a preset temperature is reached, causing the damper arrangement to seal off associated pipework or ducting.

The invention discloses a flexible air damper assembly for an air conditioner and the air conditioner and relates to the technical field of air conditioners. The flexible air damper assembly for the air conditioner aims to solve the problem that in the prior art, an air damper of an air conditioner occupies a large space of an air channel. The flexible air damper assembly for the air conditioner is used for controlling air outlets of the air conditioner to be opened or closed. The flexible air damper assembly comprises rotating shafts and flexible air dampers wound around the rotating shafts. The upper edge of each flexible air damper is fixed to the corresponding rotating shaft, and the lower edge of each flexible air damper is connected with a supporting piece. The flexible air damper assembly for the air conditioner further comprises a drive assembly. The drive assembly is connected with the rotating shafts the supporting pieces. The drive assembly can drive the rotating shafts to rotate so as to wind up or unwind the flexible air dampers. The drive assembly can drive the supporting pieces to move synchronously along with the lower edges of the flexible air dampers. When the flexible air dampers are unwound, the air outlets of the air conditioner can be shielded, and the supporting pieces can prevent the lower edges of the flexible air dampers from being blown up. The flexible air damper assembly for the air conditioner and the air conditioner can be used for indoor air conditioning.

The invention relates to an electrostatic lampblack purifying device capable of automatically sprinkling to extinguish fire, which can overcome the problem that the traditional electrostatic lampblack purifying device with a fire-fighting mechanism can not be protected in power-cut. The electrostatic lampblack purifying device comprises a shell, a front reducing air duct, a back reducing air duct, a direct-current high-voltage power supply, a honeycomb cylindrical electric field, a control box and a water-control sprinkling fire-extinguishment device, wherein the front end of the shell is hermetically connected with the front reducing air duct, the back end of the shell is hermetically connected with the back reducing air duct, and the front reducing air duct is further provided with a fireproof valve which is connected with a lampblack inlet and a direct exhaust valve through a tee air duct. Because the front end of the device is provided with the fireproof valve and the direct exhaust valve, an overtemperature control circuit can automatically close the fireproof valve and open the direct exhaust valve to exhaust lampblack when the temperature inside the device is detected beyond a set temperature. As a hydraulic control valve is adopted, fire-fighting water is opened by a mechanical device, therefore, flame detection and fire-extinguishment work can be normally carried out in power cut condition compared with a power-controlled fire-fighting valve.

The invention belongs to the technical field of drying of bulk materials, and particularly discloses a compartment type dryer. The compartment type dryer comprises a box body, an air damper, a heater and a tray, wherein an air inlet and an air outlet are formed in the box body; and the tray is a silk screen. The compartment type dryer is characterized by further comprising a fan and a ventilating duct, wherein one end of the ventilating duct is communicated with the air inlet; the other end of the ventilating duct is communicated with the air outlet; the fan is connected on the ventilating duct; a water absorbing device is arranged in the ventilating duct; the tray, the heater and the air damper are fixed in the box body; the air damper is positioned between the tray and the heater; and the heater and the air inlet are oppositely arranged. Hot air in the box body is recycled because of the ventilating duct, so that the heat utilization rate is high. The water absorbing device can effectively absorb water in hot air, so that humidity of hot air is kept within a proper range all the time, thereby increasing the drying effect.

A fire damper comprising a housing, a louver member rotationally engaged within the housing, the louver member having a substantially gas tight seal with the housing when the louver member is in a closed position, a biasing member disposed outside of the housing and engaged with the louver member for moving the louver member from an open position and holding the louver member in the closed position, a temperature sensitive member releasably connected to the louver member, the temperature sensitive member for releasing the louver member from the open position at a predetermined temperature, and the louver member further comprising insulation material to control heat transfer through the louver member for a predetermined period of time.

A flue fire damper for a range hood comprises a fire damper bottom plate and a fire damper body. A fire damper piece is arranged on the fire damper body. The flue fire damper is characterized in that the fire damper body is provided with a first support and a second support, an elastic piece is arranged on the first support, and a deformation piece capable of generating corresponding deformation along with the temperature change is arranged on the second support; a forced closing rod is arranged between the first support and the second support, the first end of the forced closing rod is arranged on the first support, and under the state that the deformation piece does not deform, the second end of the forced closing rod is blocked through the deformation piece and limited on the second support; and under the state that the deformation piece deforms due to temperature rising, the forced closing rod disengages from the deformation piece and the second support, and the fire damper piece is forced to be closed through the elastic piece. The fire damper is simple in structure and stable and reliable in work. After a flue joint outer cover is arranged, the situation of flue blockage can be effectively reduced.

A heat activated sealing apparatus for closing and locking a plurality of ventilation damper blades of a ventilation framework includes a fire detection assembly for detecting a fire condition and an actuator. A damper closure assembly includes an axle in communication with the actuator of the fire detection assembly and operatively coupled to the plurality of dampers of the ventilation framework, the axle being selectively rotatable between a start configuration at which the plurality of ventilation dampers are at the open configuration and a deployed configuration at which the plurality of ventilation dampers are at the closed configuration. The damper closure assembly includes a locking assembly movable between an unlocked configuration allowing rotatable movement of the axle and a locked configuration not allowing rotatable movement of the axle. The locking assembly is movable to the locked configuration only when exposed to a predetermined amount of heat from the fire condition.

Latching apparatus for use with a fire damper assembly wherein extendable and retractable damper leaves normally are maintained by a fusible linkage in a position enabling air to flow through a duct. The fusible linkage may be coupled to and uncoupled from a damper-supporting frame so as to facilitate testing of the damper assembly to ensure it is capable of automatically moving from its passage-open position to a passage-closed position in response to a predetermined rise in ambient temperature. The latching mechanism is operable simply by squeezing a spring retainer to enable it to pass into and out of latched engagement with a latch keeper.

The invention relates to a special fireproof valve used in kitchen and toilet, wherein it comprises the divert tube at the inner side of gas inlet of ventilate tube; the lower end of divert tube is connected to the gas inlet; the fireproof cover plate is above the divert tube or inside the tube; the bottom of cover plate is put or hinged on the wall of divert tube and via fusion wires is fied on the wall of ventilate tube or divert tube; when the fusion is broken, the fireproof cover plate via gravity will fall back to the top of divert tube or the table of wall of diver tube, to seal the tube. The invention has simple structure, while it can be made from fireproof material or cement, with low cost.

The invention relates to a building fire-fighting intelligent smoke-discharge-prevention control system which comprises a fire-fighting control terminal, an intelligent smoke-discharge-prevention controller, a linkage controller, a cloud side database, a ventilation system, a signal transmitting module, a smoke discharge system and a smoke prevention system. A detector connected with the signal transmitting module detects smoke in a belonging space and transmits a detection result into the linkage controller in a form of signals, the linkage controller controls a ventilation controller so as to turn off a fireproof valve, meanwhile a ventilator is shut down, an alarm is started, the smoke discharge controller is controlled to switch on a smoke discharge valve and start a smoke blocking vertical wall and a smoke ventilator, meanwhile an air supplementing machine is started to rapidly discharge smoke, the fireproof controller is controlled to switch on a positive pressure air supply valve and a positive pressure air supplier, a positive pressure is formed in the belonging space, and smoke is prevented from entering the belonging space. The intelligent information exchange control over the fire-fighting smoke-discharge-prevention control system is realized, the automation degree is high, and actual demands of use are satisfied.

The invention discloses a fire resisting damper used for treating paint mist. The fire resisting damper comprises a body, shutters, rotating shafts and rotating shaft control valves. The rotating shafts are transversely arranged in the body at equal intervals. The shutters are fixed to the rotating shafts. The rotating shaft control valves are arranged at one ends of the rotating shafts and used for controlling the rotating shafts to move. The rotating shaft control valves are smoke control valves and / or temperature control valves. The rotating shafts are hollow pipes. Water inlet valves are arranged at the other ends of the rotating shafts. Water outlet holes are uniformly formed in the rotating shafts. The fire resisting damper has the advantages that when fires occur, the rotating shaft control valves control the rotating shafts to rotate, the rotating shafts drive the shutters to rotate to enable the fire resisting damper to be in a closed state as in the picture, airflow in a desorption bin or a catalyzing bin is cut off to enable the desorption bin or the catalyzing bin to be in closed space, the situation of combustible gas entering is reduced, and flames are prevented from entering the desorption bin at the same time; meanwhile, the water inlet valves are opened, and water enters or exits from the bin through the water outlet holes to achieve the extinguishment effect.

The invention provides a multi-direction shape memory alloy, soft steel and lead combined drum-like damper and relates to a shock absorption control device in the technical fields of building structures and mechanical engineering. The damper comprises a drum-like shape memory alloy outer cylinder, a circular soft steel inner cylinder, an upper end plate, a lower end plate, a built-in lead damper and a superplastic shape memory alloy wire for coordinating the inner cylinder and the outer cylinder. The damper adopts the external drum-like shape memory alloy cylinder, the circular soft steel inner cylinder, the built-in lead damper and the superplastic shape memory alloy wire which is arranged like a Chinese character mi for coordinating the inner cylinder and the outer cylinder. The damper has the advantages of large recoverable deformation, strong damping capacity, good durability, anti-corrosion property and anti-fatigue performance, a large range of working temperature, low maintenance cost and the like, has the horizontal, vertical and torsional automatic reset functions, and can perform energy dissipation and shock absorption on wind vibration and earthquake in horizontal and vertical directions and further play a good protection role for a building structure when the earthquake and the wind vibration occur.

A fire collar or fire damper for location within a concrete slab of a building. The device incorporates a damper arrangement (12) and a heat detector (18, 19) comprising a metal alloy or lead which melts when a preset temperature is reached, causing the damper arrangement to seal off associated pipework or ducting.