阅读说明：本技术 用于排烟防火阀的远控执行机构及其排烟防火阀 (Remote control actuating mechanism for smoke exhaust fire damper and smoke exhaust fire damper thereof ) 是由 宋旭明 宋文晟 刘燚 于 2019-10-23 设计创作，主要内容包括：一种用于排烟防火阀的远控执行机构,包括底板、开关撞块、微动开关、按钮或拨动组件、电磁铁、杠杆组件、棘爪组件、支撑块、复位弹簧、复位板、棘轮与钢丝绳轮盘组件；杠杆组件包括杠杆轴与杠杆,杠杆后端与电磁铁衔铁连接,并与按钮或拨动组件中的滑块搭接,杠杆的前端设有卡槽,复位状态时杠杆前端杠杆卡槽与支撑块的后端下凸起搭接即吻合匹配,防止支撑块绕支撑轴顺时针转动；排烟防火阀动作时是指按钮或拨动组件被按动或电磁铁工作衔铁运动将杠杆后端拨动,杠杆在力矩下转动,支撑块后端下凸起脱开,支撑块和棘爪组件能绕转轴转动时棘爪脱开,棘轮在钢丝绳轮盘中钢丝绳拉力作用下绕中心轴(13)逆时针旋转；棘爪组件安装在复位板上,支撑块、棘爪组件、复位板三者相对固定并能够绕支撑轴或称转轴旋转,在复位状态时棘爪组件的上端棘爪在棘轮的轮齿之间。(A remote control actuating mechanism for a smoke exhaust fire damper comprises a bottom plate, a switch collision block, a micro switch, a button or toggle assembly, an electromagnet, a lever assembly, a pawl assembly, a supporting block, a reset spring, a reset plate, a ratchet wheel and a steel wire rope pulley assembly; the lever assembly comprises a lever shaft and a lever, the rear end of the lever is connected with the electromagnet armature and is lapped with a button or a slide block in the toggle assembly, a clamping groove is arranged at the front end of the lever, and the clamping groove of the lever at the front end of the lever is matched with the rear end of the supporting block in a protruding and lapping way in a resetting state, so that the supporting block is prevented from rotating clockwise around the supporting shaft; when the smoke discharge fire prevention valve acts, the button or toggle component is pressed or the electromagnet works to work the armature to toggle the rear end of the lever, the lever rotates under the moment, the rear end of the supporting block protrudes downwards to be disengaged, the supporting block and the pawl component can rotate around the rotating shaft, the pawl is disengaged, and the ratchet wheel rotates anticlockwise around the central shaft (13) under the action of the tension of the steel wire rope in the steel wire rope wheel disc; the pawl subassembly is installed on the board that resets, and supporting shoe, pawl subassembly, the board three that resets are fixed relatively and can rotate around the back shaft or the pivot, and the upper end pawl of pawl subassembly is between the teeth of a cogwheel of ratchet when resetting state.)

1. A remote control actuating mechanism for a smoke exhaust fire damper is characterized by comprising a bottom plate, a switch collision block, a micro switch, a button or toggle assembly, an electromagnet, a lever assembly, a pawl assembly, a supporting block, a reset spring, a reset plate, a ratchet wheel and a steel wire rope pulley assembly; the lever component comprises a lever shaft and a lever, the rear end of the lever is connected with the electromagnet armature and is lapped with a button or a slide block in the toggle component, the front end of the lever is provided with a clamping groove, and the clamping groove of the lever at the front end of the lever is matched with the rear end of the supporting block in a downward protruding lapping way in a reset state, so that the supporting block is prevented from rotating clockwise around the supporting shaft (10-1); when the smoke discharge fire prevention valve acts, the button or toggle component is pressed or the electromagnet works to work the armature to toggle the rear end of the lever, the lever rotates under the moment, the rear end of the supporting block protrudes downwards to be disengaged, the supporting block and the pawl component can rotate around the rotating shaft, the pawl is disengaged, and the ratchet wheel rotates anticlockwise around the central shaft (13) under the action of the tension of the steel wire rope in the steel wire rope wheel disc; the pawl component is arranged on the reset plate, the supporting block, the pawl component and the reset plate are relatively fixed and can rotate around the supporting shaft or a rotating shaft (10-1), and the pawl at the upper end of the pawl component is arranged between the gear teeth of the ratchet wheel in the reset state; when the smoke discharge fire prevention valve acts, the finger button or the toggle component is pressed or the electromagnet works to work the armature to toggle the rear end of the lever, so that the clamping groove of the front end lever is separated from the lap joint of the rear end downward bulge of the supporting block;

when the smoke exhaust fire damper is reset, the rear end of the reset plate can contact a switch collision block of the microswitch when rotating; the ratchet wheel and steel wire rope wheel disc assembly comprises a ratchet wheel, a steel wire rope wheel disc and a central shaft, the ratchet wheel and the steel wire rope wheel disc which are coaxial are fixed and rotate on the central shaft, and one end of a steel wire is fixed and wound around the steel wire rope wheel disc; the reset plate, the fixing plate, the ratchet wheel and steel wire rope pulley assembly, the switch collision block, the micro switch, the button assembly, the electromagnet, the lever assembly, the pawl assembly, the reset spring and the supporting block are all installed on the bottom plate.

2. The remote control actuator for smoke exhaust fire damper as claimed in claim 1, wherein the button assembly comprises a button, a vertical sloping plate, a spring, a button mounting bracket and a toggle connecting rod, the button and the vertical sloping plate are integrated and mounted on the button mounting bracket, the button spring is sleeved on the upper end of the vertical sloping plate, the toggle connecting rod is in a horizontal direction, a slotted hole is formed in the toggle connecting rod, the vertical sloping plate is inserted into the slotted hole, and the toggle connecting rod is linked with the lever assembly.

3. The remote control actuator for smoke exhaust fire damper as claimed in claim 1, wherein the toggle assembly is a toggle assembly, the toggle assembly comprises a toggle button and a toggle link for fixing the toggle button, and an end of the toggle link is in linkage contact with or fixed to a rear end of the lever.

4. The remote control actuator for smoke exhaust fire damper according to any one of claims 1 to 3, wherein the lever assembly comprises a lever pin, an integrated lever and a slot at the front end of the lever, the pawl assembly comprises a pawl and a back stop plate integrally formed with the pawl, a long hole is formed in the center of the pawl, the back end of the back stop plate is fixed to a return spring, the return spring is installed above the return plate, the pawl and the back stop plate integrally formed with the pawl are fixed below the return plate, and the rotating shaft is a mounting shaft of the support block, the return plate and the pawl assembly and is inserted into the long hole formed in the center of the pawl.

5. Remote control actuator for smoke exhaust fire damper according to any one of claims 1-3, wherein one end of the support block return spring (9-1) is provided with a support block return spring (9-1) for fixing the support block (9) for pulling the support block to return rotationally. And a torsion spring can be arranged on a rotating shaft such as a lever for resetting.

6. The remote control actuator for smoke exhaust fire damper according to any one of claims 1 to 3, wherein the support block and the front end of the lever have matching grooves and tenons, i.e. projections and notches, the support block is below, the pawl is in the middle, the reset plate is mounted above the pawl, and the support block or the reset plate is drilled for mounting a vertical rotating shaft.

7. A smoke exhaust fire damper of a remotely controlled actuator as claimed in any one of claims 1 to 6 comprising a smoke exhaust fire damper and a remotely controlled actuator, wherein said remotely controlled actuator is mounted above the smoke exhaust fire damper. The smoke-discharging fire-resisting damper comprises a valve body and a control shaft with fixed blades, wherein one end of a steel wire is wound on a lever fixed on the control shaft in a rotating mode, and the other end of the steel wire is fixed and wound on a ratchet wheel component of the remote control actuator.

Technical Field

The invention relates to a fire-fighting smoke-discharging fire-proof valve, which comprises a positive pressure air port valve, a fire-proof valve and a remote control actuating mechanism of a smoke-discharging valve.

Background

The fire-fighting smoke-discharging fire-resisting valve includes positive pressure air port valve, fire-resisting valve and smoke-discharging valve, etc. and is a starting and stopping device of smoke-preventing system, smoke-discharging system and possible safety air-supplying device which are set in the building and can be used for preventing fire smoke from spreading and expanding. The smoke prevention system comprises: the system adopts a mechanical pressurization air supply mode or a natural ventilation mode to prevent the smoke from entering areas such as an evacuation channel and the like. A smoke exhaust system: and a system for discharging the smoke to the outside of the building by adopting a mechanical smoke discharging mode or a natural smoke discharging mode. Mechanical pressurization and air supply: the device is applied to staircases, front rooms and other systems needing smoke prevention and exhaust.

In the smoke-discharging fire-resisting damper with remote control actuating mechanism, the smoke-discharging fire-resisting damper includes valve body, blade and control shaft control for opening and closing blade, the rotation of control shaft is controlled by winding one end of steel wire, and another end of steel wire is wound on the described remote control actuating mechanism of the damper, and the remote control actuating mechanism adopts the invented device.

The smoke discharge fire prevention valve is arranged to be normally open or normally closed according to the form of a smoke discharge port. The setting of the fire damper in the ventilation air-conditioning system and the selection of 'high-rise building code' and 'building code' have requirements on the setting of the fire damper: (1) the air pipe passes through the fireproof subareas; (2) the air conditioner passes through a ventilation and air conditioning machine room, and a partition wall and a floor slab of a room which is important or has high fire hazard risk; (3) the fire-proof valve is arranged on the horizontal pipe section at the joint of the vertical air pipe and each layer of horizontal air pipe, but when the ventilation and air-conditioning system of each fire-proof subarea of the multi-layer building is independently arranged, the fire-proof valve is not arranged at the joint of the horizontal air pipe and the vertical main pipe in the fire-proof subarea; (4) one air pipe is respectively arranged on the two sides of the position passing through the deformation joint. The fire-proof valve at the above parts is normally opened at ordinary times, and is automatically closed when the temperature of the fire reaches 70 ℃. The fire damper should be arranged close to the fire separation part and should be provided with a support and a hanger independently. When the fire damper is concealed, an access hole is arranged at the installation position. The vertical exhaust duct of a public room must be provided with a fire damper on the branch pipe when no measures for preventing backflow are taken. In a public building kitchen, a fire-proof valve fused at 150 ℃ is arranged at the joint of an oil fume exhaust pipeline and a vertical air duct in order to prevent the fire-proof valve from generating misoperation due to higher oil fume temperature.

Setting of fire prevention valve in new trend system design is concentrated to air conditioner: the form of the fresh air system generally comprises a horizontal fresh air system and a vertical fresh air system which are arranged in a layered mode. (1) The total fresh air vertical duct of the horizontal fresh air system arranged in layers crosses fire-proof subareas, and a fire-proof valve fused at 70 ℃ is arranged on a suction inlet air duct of each layer of fresh air unit. (2) The vertical air duct of the vertical fresh air system crosses over a fireproof subarea, and a fireproof valve which is fused at 70 ℃ is required to be arranged at an air supply outlet. No matter the smoke exhausting system is a vertically arranged walkway or a horizontally arranged room, a smoke exhausting fireproof valve which can be automatically closed at 280 ℃ is arranged at the joint of the smoke exhausting branch pipe and the vertical air duct. The smoke discharge fire prevention valve is normally open or normally closed, for a room smoke discharge system, when a smoke discharge pipeline bearing one fire prevention subarea has smoke discharge ports of a plurality of smoke prevention subareas, the normally open smoke discharge fire prevention valve is arranged on the main pipe of the fire prevention subarea, and meanwhile, the normally closed smoke discharge port or smoke discharge valve is arranged on each smoke prevention subarea branch pipe. See alsohttps://wenku.baidu.com/view/ f111f18582d00c67.html。

Action of the fire-fighting smoke-discharging fire-proof valve: the hard-wired direct action of a microswitch (in an actuating mechanism) of the positive pressure air supply valve is utilized; feeding back a starting signal through a monitoring module and a hard wire; a smoke exhaust fire damper which can be automatically closed when the temperature of smoke exceeds 280 ℃ is arranged on an inlet header pipe of the smoke exhaust fan and is interlocked with the smoke exhaust fan, and when the smoke exhaust fire damper is closed, the fan stops running. The smoke exhaust fan is ensured to continuously work for 30min at 280 ℃. It should be noted that the smoke exhaust fire damper is arranged in front of and behind the smoke exhaust fan and is flexibly determined according to specific conditions. For example, when the basement is only one floor and the smoke is exhausted to the outdoor through the vertical duct, the smoke exhaust fire prevention valve is preferably arranged on the inlet main pipe of the smoke exhaust fan. When the number of the basement layers is two or more, and the layers share one smoke exhaust vertical shaft, each smoke exhaust fire prevention valve is arranged on the outlet main pipe of the smoke exhaust fan, namely arranged close to one side of the smoke exhaust vertical shaft.

A smoke area separating device in underground and large space smoke preventing and discharging systems of civil air defense engineering and high-rise civil buildings. After the fire control center sends out a fire alarm signal or directly receives a smoke sensing signal, the smoke blocking vertical wall (an actuating mechanism) arranged above the suspended ceiling is controlled to quickly fall to a set height to form smoke area separation, and high-temperature smoke is quickly discharged out of a room by the smoke exhaust fan, so that an environment is created for the lifesaving and evacuation of personnel in the fire alarm area, and time is strived for. The fire control room can display the working state of the fan power supply of the smoke prevention and discharge system. The fire control room can display the manual and automatic working states of the smoke prevention and discharge system and the normal working state and action state of the fan of the smoke prevention and discharge system. The fire control room can control the actions of the fan of the smoke-proof and smoke-discharging system, the electric smoke-discharging fire-proof valve, the electric smoke-blocking vertical wall, the electric fire-proof valve, the normally closed air supply opening, the smoke-discharging valve (opening) and the electric smoke-discharging window, and display the feedback signals.

For example, the remote control smoke exhaust valve has the same main function as the smoke exhaust valve, but the valve body of the remote control smoke exhaust valve is separated from the operating device, the operating device is arranged on a wall near the valve body, which is a wall about 1200mm higher than the ground, the operator is connected with the valve body through a steel wire rope for remote control, and the length of the steel wire rope is generally 6 m. The following functions are required: 1. electric control: the fire-fighting center electrical signal (DC24V) electromagnet action valve is automatically opened; 2. manual opening and manual resetting; 3. and after the switch is switched on, a group of active contact signals and a group of passive contact signals are output. If necessary, a trigger action end of the temperature sensor is also arranged.

The existing device comprises a box body, a binding post, a microswitch, a 24V electromagnet, a rope pulley disc with a rotating shaft and a fixed shaft, a ratchet wheel, a torsion spring, a pawl connected with a pawl shaft, a pulling rod, a micro-motion pressure spring and an action rod of the 24V electromagnet, wherein the box body is fixed with the operating device; an armature, which electromagnets the pawl, needs to be arranged to control the pawl via a lever, so that the ratchet wheel is controlled. The existing rope sheave disc with the coaxial ratchet wheel can be manually rotated, a steel wire rope wound on the rope sheave disc through a manual handle can be released under elasticity or gravity to control a valve remotely, the valve needs to be manually controlled, in order to prevent misoperation control on the valve, linkage control of a pawl can be controlled through a lever together with an armature of an electromagnet during manual control, therefore, an existing manual control executing device also stirs the pawl through the manual handle, the existing lever linkage mechanism is complex, the manual handle stirred by the pawl and the manual handle rotated by the rope sheave disc are of the same or similar structure, misoperation is frequently caused during use, and the structure of the rotating handle needs to be improved.

CN200982459Y discloses a remote smoke exhaust valve actuating mechanism, which comprises wiring terminals, a microswitch and a wiring head seat, wherein the wiring terminals, the microswitch and the wiring head seat are fixed on the bottom plate in a box body and a panel; the rope wheel disc and the ratchet wheel with a rotating shaft and a fixed shaft are matched with a torsion spring on the swing frame and a pawl connected with a pawl shaft through the ratchet wheel, and the swing frame is also connected with a pull rod and a micromotion pressure spring and is fixed on a swing frame seat through a swing frame screw and the torsion spring; the swing frame is also fixed on the bottom plate, a swing rod seat is connected with a swing rod screw and a swing rod of a torsion spring to be matched, and the swing rod is also connected with the electromagnet; the button assembly is characterized by also comprising a button sleeve which is fixed on the bottom plate and provided with a button shaft, a torsion spring and a pressing ring, wherein the button shaft end is fixed with a button, and a rocker on a rocker shaft is respectively matched with the oscillating bar and the pressing ring to form the button assembly; the panel on still be connected with mobilizable flip, still be connected with the sealing washer with pivot cooperation department on the dead axle. The main deficiency of the existing mechanism is that the mechanism needs to be manually reset twice during resetting: firstly, the support plate is manually reset to be in lap joint with the lever, and secondly, the ratchet wheel assembly is reset by the wrench, so that the operation is complicated, the sequence is easy to be wrong, and parts are easy to be damaged in wrong time.

In general, the practicality and reliability of the above-described structure of the button shaft, torsion spring, pressing ring and button sleeve still needs to be improved.

Disclosure of Invention

The invention aims to provide a remote control smoke exhaust fire prevention valve actuating mechanism of a smoke exhaust fire prevention valve for fire protection or safety guarantee, which can be manually opened and manually reset in a button type and is compatible with the opening and closing of an electromagnet; and after the switch is switched on, a group of active contact signals and a group of passive contact signals are output.

The technical scheme is that the remote control actuating mechanism for the smoke exhaust fire damper comprises a bottom plate, a switch collision block, a micro switch, a button or toggle assembly, an electromagnet, a lever assembly, a pawl assembly, a supporting block, a reset spring, a reset plate, a ratchet wheel and a steel wire rope pulley assembly, wherein the switch collision block is arranged on the bottom plate; the lever assembly comprises a lever shaft and a lever, the rear end of the lever is connected with the electromagnet armature and is lapped with a button or a slide block in the toggle assembly, a clamping groove is arranged at the front end of the lever, and the clamping groove of the lever at the front end of the lever is matched with the rear end of the supporting block in a protruding and lapping way in a resetting state, so that the supporting block is prevented from rotating clockwise around the supporting shaft; when the smoke exhaust fire prevention valve acts, the button or toggle component is pressed or the electromagnet works to work the armature to toggle the rear end of the lever, the lever rotates under the moment, the rear end of the supporting block protrudes downwards to be disengaged, the supporting block and the pawl component can rotate around the rotating shaft, the pawl is disengaged (the lever rotates around the supporting column in the anticlockwise direction), and the ratchet rotates anticlockwise around the central shaft (13) under the action of the tension of the steel wire rope in the steel wire rope wheel disc; the pawl component is arranged on the reset plate, the supporting block, the pawl component and the reset plate are relatively fixed and can rotate around the supporting shaft or a rotating shaft (10-1), and the pawl at the upper end of the pawl component is arranged between the gear teeth of the ratchet wheel in the reset state; when the smoke exhaust fire damper acts, the finger button or the toggle component is pressed or the electromagnet works to work the armature to toggle the rear end of the lever, so that the clamping groove of the front lever is separated from the lap joint of the rear-end downward bulge of the supporting block.

When the smoke exhaust fire damper is reset, the rear end of the reset plate can contact a switch collision block of the microswitch when rotating; the ratchet wheel and steel wire rope wheel disc assembly comprises a ratchet wheel, a steel wire rope wheel disc and a central shaft, the ratchet wheel and the steel wire rope wheel disc which are coaxial are fixed and rotate on the central shaft, and one end of a steel wire is fixed and wound around the steel wire rope wheel disc; the reset plate, the fixing plate, the ratchet wheel and steel wire rope pulley assembly, the switch collision block, the micro switch, the button assembly, the electromagnet, the lever assembly, the pawl assembly, the reset spring and the supporting block are all installed on the bottom plate.

The lever subassembly includes the lever round pin axle, the lever of integration and the draw-in groove at the lever front end, the pawl subassembly includes the pawl and ends the plate washer with the integrative back of preparing of pawl, the central authorities (the plate at pawl (place) are equipped with rectangular shape hole after ending the plate washer the place ahead), the rear end that ends the plate washer after is fixed with reset spring, reset spring installs in the board top that resets, the pawl with the integrative back that prepares of pawl end the plate washer below that resets fixed, the pivot is the supporting shoe, the installation axle that resets plate and pawl subassembly, insert the rectangular shape downthehole that pawl central authorities were equipped with.

The smoke exhaust fire prevention valve of the remote control actuating mechanism comprises the smoke exhaust fire prevention valve and the remote control actuating mechanism, wherein the remote control actuating mechanism is arranged above the smoke exhaust fire prevention valve. The smoke-discharging fire-resisting damper comprises a valve body and a control shaft with fixed blades, wherein one end of a steel wire is wound on a lever fixed on the control shaft in a rotating mode, and the other end of the steel wire is fixed and wound on a ratchet wheel component of the remote control actuator.

The working process of the invention is as follows: in a normal state, namely a reset state, the electromagnet and the button are in normal positions, namely the electromagnet does not work, the button is not pressed (or a toggle button is not toggled), when the lever is in the reset state, the front end lever clamping groove 6-2 and the rear end bulge of the supporting block 9 are in matched positions, namely in matched lap joint, the rear end bulge of the supporting block 9, the upper end pawl and the reset plate are relatively fixed and cannot rotate, the pawl 7-1 is arranged between the teeth of the ratchet wheel, the ratchet wheel can only rotate in a single direction, in the figure, the ratchet wheel and the steel wire rope pulley can only be manually rotated clockwise around the central shaft by using an inner hexagonal wrench (the prior art is also provided), when the ratchet wheel rotates clockwise on the central shaft corresponding to the steel wire rope wheel disc, the steel wire drives the control shaft and the like on the valve body to rotate; if the button is pressed down or the electromagnet works to attract any action, the movable fixed end of the electromagnet armature or the button component drives the rear end lever to rotate anticlockwise, the clamping groove on the front end lever is disengaged from the rear end protrusion of the supporting block 9, the supporting block (rear end protrusion) and the pawl component can rotate around the rotating shaft 10-1, the pawl is equivalent to a unhooking state, the steel wire of the tensioned valve body shaft and the like can drive the ratchet wheel to rotate anticlockwise under the action of the reset force, and the blade of the smoke exhaust fire prevention valve rotates to enable the valve or the air door to enter a state after opening or action.

Has the advantages that: the smoke-discharging fire-resisting valve and the remote control smoke-discharging fire-resisting valve actuating mechanism of the invention need to be connected with the valve body through the steel wire rope for remote control, and comprise all functions of the prior device, and make the manual control and the control of the electromagnet completely compatible and achieve the same function, the micro switch and the elements of the 24V electromagnet in the aspect of electrical appliances are included, and the positions of the buttons controlled by the manual control can be consistent, the linkage mechanism of the lever and the supporting block is not complex, and the invention has the following control functions and electric control: fire center electrical signal (DC24V) solenoid actuated valve actuation; manually actuating the valve; and outputting a group of active contact signals and a group of passive contact signals after action. If necessary, a trigger action end of a temperature sensor is also arranged on the valve body. The invention does not need two times of manual reset, has reliable mechanical action and has been tested by times required by standards in practical use. The invention achieves the whole functions of the existing device, is ingenious in the design of the mechanical structure, is completely compatible with the control of the manual operation and the electromagnet, and achieves the same action control effect, the microswitch and the DC24V electromagnet are completely included, the lap joint and the disconnection between the pawl tooth and the ratchet tooth are very reliable, the action is direct, and the lap joint between the lever and the support block, and between the pawl tooth and the ratchet tooth after the action is reliable; after action, the overlapping contact between the pawl and the ratchet teeth is failed, but the pawl and the ratchet teeth are not separated, so that the valve and the internal state of the actuating mechanism are reset simultaneously while the reset ratchet assembly is rotated. The invention solves the problem that the actuating mechanism in the field is not solved, and the invention is also a device which is reliable in mechanical automation. The manual intervention is reliable and minimum, the automatic execution is achieved, and the manual intervention can be simply performed at one time.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic structural diagram of a button assembly according to the present invention.

Fig. 3 is a schematic view of the mounting structure of the pawl assembly of the present invention.

Detailed Description

In the smoke-discharging fire-resisting damper with remote control actuating mechanism, the smoke-discharging fire-resisting damper includes valve body, blade and control shaft control of opening and closing of blade, the rotation of control shaft is controlled by fixing one end of steel wire on the end portion of control shaft lever, another end of steel wire is winded round the described remote control actuating mechanism, and the remote control actuating mechanism adopts the invented device.

As shown in the figure, the device comprises a bottom plate 1, a switch collision block 2, a micro switch 3, a button or toggle assembly 4, an electromagnet 5, a lever assembly, a pawl assembly, a supporting block 9, a return spring 8, a return plate 10, a fixing plate 11, a ratchet wheel and steel wire rope wheel disc assembly 12; a lever shaft 6-1, a central shaft 13 and a steel wire 14 are fixed on the bottom plate; the lever component comprises a lever shaft and a lever, the rear end of the lever shaft is provided with a flexible fixed end which is matched with the electromagnet armature and the button component, the front end of the lever shaft is provided with a clamping groove, the clamping groove at the front end of the lever is matched with the rear end bulge of the supporting block 9 in a lap joint (matching) mode when the lever is in a reset state, and the rear end bulge of the supporting block 9 is separated from the lever clamping groove when the lever acts; the pawl component is arranged on the reset plate 10, the supporting block, the pawl and the reset plate 10 are relatively fixed and can rotate around a rotating shaft 10-1, and the pawl (tooth) 7-1 at the upper end is arranged between the gear teeth of the ratchet wheel 7 in the reset state; after action, under the action of the right thrust of the pawl (tooth) 7-1 on the ratchet wheel 7, the whole ratchet wheel assembly moves clockwise around the shaft, and the overlapping joint of the pawl (tooth) 7-1 and the ratchet wheel fails; the rear end of the reset plate can contact a switch collision block of the micro switch when rotating; the ratchet wheel and steel wire rope wheel assembly 12 comprises a ratchet wheel, a steel wire rope wheel and a central shaft, wherein the ratchet wheel and the steel wire rope wheel which are coaxial rotate on the central shaft, and steel wires are fixed on the steel wire rope wheel and wound on the steel wire rope wheel in a parallel winding mode. The reset plate 10, the fixing plate 11, the ratchet wheel and steel wire wheel disc component 12, the switch collision block 2, the micro switch 3, the button component, the electromagnet 5, the lever component, the pawl component, the reset spring 8 and the supporting block 9 are all arranged on the bottom plate 1.

The button assembly comprises a button 4-1, a vertical inclined plate 4-3, a spring 4-2, a button mounting bracket 4 and a toggle connecting rod 4-4, wherein a slotted hole 4-5 is formed in the toggle connecting rod, and the vertical inclined plate 4-3 is inserted into the slotted hole. Button, vertical swash plate integration and install on button installing support, button spring housing is in the upper end of vertical swash plate, stirs the connecting rod and is the horizontal direction, stirs connecting rod and lever assembly interlock. Electromagnet 5 is an electromagnet that operates at DC 24V.

The lever component comprises a lever shaft 6-1, an integrated lever 6 and a clamping groove 6-2 at the front end of the lever, a supporting block (a bulge at the rear end) is clamped by the clamping groove in the same shape as the clamping groove, when the supporting block is prepared by a flat plate, the bulge at the rear end of the supporting block is a plate with a downward bent edge and is clamped in the clamping groove, when an electromagnet is attracted or a button is pressed down, the clamping groove moves leftwards, the supporting block (the bulge at the rear end) is separated from the clamping groove, the pawl component comprises pawls 7-1 which can passively rotate (clockwise or anticlockwise) around the shaft 10-1, and at the moment, the ratchet wheel is released, although the pawls are still; when the electromagnet or the button does not act, the front end of the lever resets rightwards; when the manual spanner rotates the ratchet wheel component clockwise, the pawl of the pawl component rotates anticlockwise around the rotating shaft 10-1 under the action of the friction force of the ratchet wheel and the torsion force of the supporting block resetting tension spring 10, and the bent part of the rear end bulge of the supporting block enters the clamping groove of the lever again and is in lap joint locking.

In FIG. 3, the pawl assembly comprises a pawl 7-1 and a vertically upturned rear stop plate 7 integrally prepared with the pawl, a long waist-shaped or long strip-shaped hole 7-2 is formed in the center of the rear stop plate, the rear end of the rear stop plate 7 is fixed with a return spring 8, the front end of the return spring 8 is fixedly arranged on a return plate 10, the pawl 7-1 and the rear stop plate 7 integrally prepared with the pawl are fixed below the return plate, a rotating shaft 10-1 is a supporting block 9, the pawl 7-1, the return plate and a mounting shaft of the pawl assembly (the supporting block 9, the return plate and the pawl assembly are sleeved on the mounting shaft), and the mounting shaft is inserted into the front end of the long strip-shaped hole 7-2 formed in the rear stop plate; when an inner hexagonal wrench is used for clockwise rotating the ratchet wheel and the wire rope wheel disc assembly 12 (related to the ratchet wheel tooth direction of the ratchet wheel, corresponding to the figure 1 of the invention), the ratchet teeth are continuously pushed away along the bevel edge of the ratchet wheel teeth and are embedded between ratchet teeth of one ratchet wheel and another ratchet wheel in a reciprocating motion under the action of the return spring 8, the pawl 7-1 is provided with a strip-shaped hole 7-2, the rotating shaft 10-1 penetrates through the strip-shaped hole 7-2, the pawl 7-1 is driven by the return spring 8 to do the reciprocating motion under the limitation of the strip-shaped hole 7-2 (when the counter-clockwise is performed, the bulge at the rear end of the supporting block is limited by the clamping groove, and the ratchet. Reference numeral 11 of the fixing plate, and a ratchet and wire rope wheel assembly 12. The rear end of the supporting block 9 is provided with a rear end bulge matched with the clamping groove, and the rear end bulge is in concave-convex fit with the clamping groove. The fixing plate 11 may be omitted, and the ratchet may be fixed firmly with the central shaft in the wire sheave disc assembly 12 by using a fixing frame.

When the lever is in a reset state, the electromagnet and the button are in normal positions, namely the electromagnet does not work, the button is not pressed down, when the lever is in the reset state, the clamping groove 6-2 at the front end of the lever and the rear end bulge of the supporting block 9 are in a matched position, the rear end bulge of the supporting block 9, the upper end pawl and the reset plate 10 are relatively fixed and cannot rotate, the pawl 7-1 is arranged between the teeth of the ratchet wheel, the ratchet wheel can only rotate clockwise in one direction, in the figure, an inner hexagonal wrench can only be manually used for rotating clockwise, when the pawl rotates, the pawl rotates clockwise on the central shaft corresponding to the steel wire wheel disc, the steel wire drives the valve shaft to be tensioned; if the button is pressed or the electromagnet works to suck, the movable fixed end of the electromagnet armature or the button component drives the rear end lever to rotate anticlockwise, the clamping groove on the front end lever is disengaged from the rear end bulge of the supporting block 9, the supporting block (the rear end bulge) and the pawl component can rotate clockwise around the rotating shaft 10-1, the pawl is equivalent to a unhooking state, the tensioned valve shaft steel wire can drive the ratchet wheel to rotate anticlockwise, and the blades or the valve of the smoke exhaust fire-proof valve can enter an action state (opening or closing, set according to requirements). When the pawl can rotate around the rotating shaft 10-1, the right end of the supporting plate 9 is separated from the switch collision block 2 of the microswitch; a valve actuation signal is sent to the control end of the building through the microswitch. The valve actuating signal can determine the work or disconnection of the electromagnetic valve, and when the valve actuating signal is disconnected, the actuating device returns to the reset state. The pawl is also reset (the resetting process is described in the above paragraph), then the ratchet wheel and the wire rope wheel disc are manually rotated clockwise, then the wire is wound on the wire rope wheel, the wire drives the valve shaft to be tensioned, and the valve is in the resetting state. One end of the supporting block reset tension spring 9-1 is provided with a supporting block 9 which is used for pulling the supporting block to rotate and reset. And a torsion spring can be arranged on a rotating shaft such as a lever for resetting.

The working process of the ratchet wheel assembly is as follows: when the pawl is released, the pull force of the steel wire rope enables the ratchet wheel device to rotate anticlockwise, and when the pawl is reset, the steel wire rope is overcome by adopting the inner hexagonal wrench to rotate clockwise.

The elastic force of the supporting block reset tension spring 9-1 (a torsion spring can also be adopted) enables the supporting block to rotate anticlockwise to reset to a reset state, at the moment, the pawl is lapped into a groove of the ratchet wheel, and the ratchet wheel cannot rotate anticlockwise; at the moment, the supporting block 9 and the front end of the lever are provided with matching grooves and tenons, namely, notches and the supporting block are in matched lap joint with each other in a protruding mode.

The supporting block and the front end of the lever are provided with matching grooves and tenons, namely, bulges and gaps, the supporting block is arranged below the lever, the pawl is arranged in the middle of the supporting block, the reset plate is arranged on the pawl, the pawl slides along a hole in the middle of the pawl, and a vertical rotating shaft is arranged on the supporting block or the reset plate through drilling.

The main characteristic of the invention is that after the action, under the action of the reset tension spring 9-1 or the reset button spring arranged below the support plate, when the ratchet wheel is reset by the inner hexagonal wrench, the pawl device can automatically return to the initial state (the reset state (the state that the ratchet wheel is limited by the pawl teeth) at the same time, so that the ratchet wheel and the pawl teeth are effectively lapped again, and one group of output passive signals can be two groups.

The supporting block 9 and the front end of the lever are provided with matching grooves and tenons, namely notches and bulges, the supporting block 9 (with a shaped flat plate structure) is arranged below, the pawl is arranged in the middle, the reset plate is arranged above the pawl, the pawl can slide along a hole in the middle, and the supporting block and the reset plate are provided with holes for mounting a vertical rotating shaft 10-1.

Embodiment of the button assembly: the lever component is used for providing a force for shifting the lever at the rear end of the lever shaft, so that the button component can structurally be a shifting connecting rod for shifting the shifting button and fixing the pressing button, and the end part of the shifting connecting rod is in linkage contact with or fixed to the lever at the rear end of the lever shaft, namely, a left-right shifting rod is provided; if the installation position of the manual handle is the same as that of the existing smoke exhaust fire prevention valve, the button assembly is better in the following structure: the button subassembly includes the button, vertical swash plate, compression spring, button support 4 and stir the connecting rod, the tip of stirring the connecting rod is equipped with the interlock contact with lever shaft rear end lever or fixed, the button is fixed with vertical swash plate, or the cover has compression spring on the inside member of button, button support fixes on the bottom plate, expose on the button support and make the button in the hole that stretches out and draws back perpendicularly, the fixed vertical swash plate in lower part of button, vertical swash plate is in stirring a rectangular hole that the connecting rod was seted up on the surface, the tip of vertical swash plate is down, be equipped with on the lever with the loose stiff end of electromagnet armature and button subassembly, if stir the lever through a round pin axle and lever relatively fixed or through a couple. The external specification of the valve actuator is equivalent to that of the existing actuator, a rope wheel disc coaxial with a ratchet wheel can be manually rotated through a tool, a steel wire rope wound on the rope wheel disc through a manual handle (spanner) can be released under the action of elasticity or gravity to remotely control the valve, and the valve actuator can be controlled through a manual button or an electromagnet.