Close-range control executing mechanism for electric fireproof and smoke exhaust valve

Abstract

The utility model discloses a close-range control actuating mechanism for an electric fireproof and smoke exhaust valve. The close-range control actuating mechanism comprises a bottom plate (1), a lower structure and an upper structure, wherein the lower structure and the upper structure are arranged on the bottom plate (1) and are matched with each other; the lower structure comprises a steel wire rope (2), a cable twisting barrel (3), a rocker arm (28), a rocker arm shaft (29), a pulley (30) and a fixing column (31), the upper structure comprises a third lever (20), a second lever (7), a first lever (6) and a traction rod (10) which are used for saving labor and are arranged in sequence, the third lever (20) is driven in an electric driving mode or a manual driving mode or a temperature control driving device driving mode, and the second lever (7) is driven in an electric driving mode or a manual driving mode or a temperature control driving device driving mode. And the upper structure further comprises a gear limiting piece (4) and a lengthened force arm rod (5). By means of the structure, driving force can be greatly reduced, driving energy consumption is saved, resetting can be achieved through the rotary knob, safety and stability are good, and leakproofness of the valve body is improved.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical control, and particularly relates to an electric fire and smoke exhaust valve close-range control actuator, which is used for opening or closing a fire damper series and a multi-leaf smoke exhaust port and an air supply port installed in an air conditioning and ventilation system. Background Art

[0002] With the development of the national economy, market competition in the construction industry is becoming increasingly fierce. Users are constantly improving the quality of the products they purchase. In order to win market survival space, various production companies must constantly explore and create new methods and technologies to improve product quality, not only to save energy but also to save labor.

[0003] Although electric fire (smoke exhaust) valve actuators have undergone several improvements over the years, resulting in continuous performance improvements, their size, internal structure, control principles, and solenoid power have remained largely unchanged. Consequently, existing electric fire (smoke exhaust) valve actuators still suffer from the following shortcomings: 1. The force-saving lever and valve spindle lever are rigidly coupled, creating a significant impact on the actuator during valve opening and closing, which can easily loosen the actuator and internal structure, leading to unstable performance and poor after-sales service. 2. Resetting the valve is performed directly via a long handle, which is very laborious. This direct valve reset requires significant force, requiring only two hands to apply force to the handle. 3. The simple internal force-saving mechanism requires significant kinetic energy to release the valve, necessitating the use of a high-powered solenoid. The long handle also increases the size of the actuator, making it bulky and difficult to install on-site. 4. The long handle can easily rotate during release or reset, potentially injuring the operator.

[0004] Chinese patent CN202120250927.6 discloses a new type of electric fire prevention and smoke exhaust valve long-distance and short-distance control actuator, which can effectively solve the problems of large equipment, heavy reset force, unstable unhooking release performance, and large impact on the control actuator when the valve body is opened and closed. However, the mechanism has the problem that if the vibration is large, the small lever, blade-shaped lever and drive device are easily loosened due to vibration, resulting in erroneous release and reset is still relatively labor-saving. Moreover, its action on the valve body is still not direct enough. Therefore, the structure needs to be improved to make it safer and more reliable. Moreover, the reset force is still large and needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide an electric fire prevention and smoke exhaust valve close-range control actuator with better stability, higher reliability, ingenious structure, more labor-saving reset, small size and better safety.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] The electric fire prevention and smoke exhaust valve close-range control actuator comprises a base plate 1 and a lower structure and an upper structure arranged on the base plate 1 that cooperate with each other; the lower structure comprises a steel wire rope 2, a cable drum 3, a rocker 28, a rocker shaft 29, a pulley 30, and a fixed column 31, the cable drum 3 and the rocker shaft 29 are both set to penetrate the base plate 1, the rocker shaft 29 is located at the upper part of the base plate 1, and the cable drum 3 is located at the lower part of the base plate 1; a gear 38 and a knob 32 are fixedly sleeved on the part of the cable drum 3 protruding from the top of the base plate 1 in sequence from bottom to top, and the part of the cable drum 3 protruding from the bottom of the base plate 1 is fixedly connected to one end of the steel wire rope 2; the rocker shaft A return torsion spring 33 and a torsion spring limiting piece for limiting the return torsion spring 33 are sequentially sleeved on the portion of the rocker arm shaft 29 protruding above the base plate 1 from bottom to top; the portion of the rocker arm shaft 29 protruding below the base plate 1 is fixedly connected to one end of the rocker arm 28, and a valve body connecting insert 34 is also fixedly connected below this end of the rocker arm 28 for tightly and firmly fitting with the valve body main shaft fixing plate to achieve linkage; the pulley 30 is provided on the other end of the rocker arm 28; the fixing post 31 is fixedly provided on the base plate 1 and is located next to the cable drum 3, and the other end of the wire rope 2 is fixedly connected to the fixing post 31 after being guided by the pulley 30 provided on the rocker arm 28;

[0008] The upper structure includes a third lever 20, a second lever 7, a first lever 6 and a pull rod 10 that are arranged in an annular manner in sequence for saving effort. The third lever 20 is driven by an electric drive, a manual drive or a temperature-controlled drive device as needed to release the second lever 7. The upper structure also includes a gear limit plate 4 and an extended force arm rod 5. The gear limit plate 4 and the extended force arm rod 5 are coaxially mounted on a base plate pillar next to the cable drum 3, and the gear limit plate 4 and the extended force arm rod 5 are coaxially mounted on a base plate pillar next to the cable drum 3, and the gear limit plate A torsion spring is provided between the position piece 4 and the extended lever arm 5. The end of the extended lever arm 5 is connected to a grooved clamping portion 15, and a manual reset lever 11 extends outward from the clamping portion 15. The other end of the gear limit piece 4 is configured to cooperate with the gear 38 fixed to the cable drum 3 to limit or release the cable drum 3. A clamping slot is provided at the lower end of the pull rod 10, and the pull rod 10 is continuously clamped and connected to the clamping portion 15 at the end of the extended lever arm 5 through the clamping slot. The linkage between the gear limit piece 4 and the extended lever arm 5 facilitates the gear limit piece 4 to be driven up and down by the extended lever arm 5, so that it can be driven by the extended lever arm 5 to perform an upward reset movement.

[0009] Preferably, the second lever 7 is mounted on a pillar on the base plate 1 and is provided with a torsion spring, and its front end is provided with an oblique limiting groove 21, and the end cooperates with the front end of the third lever 20, and the lower edge of the limiting groove 21 is a conical protrusion 22 obliquely pointing upward toward the first lever; the third lever 20 is mounted on a pillar on the base plate 1, and its front end is provided with two step structures 23 that increase in height from the outside to the inside, and the middle and rear ends are connected to an electric drive device 8, and a spring is provided at the connection to achieve driving by electric drive. On the outside of the step structure 23, a manual release rod 24 is also extended outward to achieve manual driving, so as to replace the electric drive device 8 to release the second lever 7 when manual operation is required; the first lever 6 is mounted on a pillar located on the base plate 1 and is provided with a torsion spring, and its end facing the second lever 7 is at the end An opening groove 25 facing the second lever 7 is opened on the edge of the upper part, and a square opening 26 is further provided on the end portion near the opening groove 25. The opening groove 25 can be inserted into the limiting groove 21 of the second lever 7, and the conical protrusion 22 of the second lever 7 can be inserted into the square opening 26. Thus, the first lever 6 and the second lever 7 can be clamped together by matching the conical protrusion 22 of the second lever 7 and the square opening 26. A limiting groove 27 is provided on the other end of the first lever 6. The pull rod 10 is fixed to the base plate 1 by passing through a pull rod fixing block 9 fixedly installed on the base plate 1. A limiting block is provided at the upper end of the pull rod 10 to prevent the upper end of the pull rod from escaping from the pull rod fixing block. The limiting block can be vertically matched with the limiting groove 27 of the first lever 6. The pull rod 10 is limited between the pull rod fixing block 9 and the slot, and a compression spring 13 is also strung together.

[0010] More preferably, the electric drive device 8 is an electromagnet.

[0011] Preferably, the first lever 6 is a blade-shaped lever.

[0012] Preferably, the knob 32 is a round knob.

[0013] Preferably, the limiting slot 27 on the first lever 6 is an arc-shaped structure.

[0014] Preferably, a rocker arm limit block 37 is provided on the bottom plate 1 next to the end of the rocker arm 28 to prevent the rocker arm 28 from excessively rotating and resetting.

[0015] Preferably, a fusible tube device 35 and a fusible tube release torsion spring 36 that is blocked and restricted by the fusible tube device 35 are further provided on the base plate 1, next to the third lever 20. The fusible tube device 35 includes a fusible tube, which is passed through the base plate. The fusible tube release torsion spring 36 is blocked by the fusible tube limiter. When the fusible tube melts, the blocking restriction on the fusible tube release torsion spring 36 is lost, and the fusible tube release torsion spring 36 rotates to hit the third lever 20, thereby realizing the driving of the third lever 20 by the temperature control drive device.

[0016] Preferably, the electric fire and smoke damper proximity control actuator further includes a frame and a cover plate that cooperate with the base plate 1, allowing the lower and upper structures to be disposed within the box formed by the base plate 1, the frame, and the cover plate. The manual release lever 24, the manual reset lever 11, and the knob 32 are all disposed outside the box for ease of operation. More preferably, the manual release lever 24 and the manual reset lever 11 protrude outside the frame, and at least the top end of the knob 32 protrudes outside the cover plate.

[0017] The process of unlocking and releasing the electric fire protection and smoke exhaust valve close-range control actuator is as follows:

[0018] Drive the third lever 20 to change to the released state, so that the states of the second lever 7, the first lever 6 and the pulling rod 10 arranged in sequence change in sequence, thereby relaxing the control of the extended lever arm 5, and then allowing the gear limit plate 4 to release the restriction on the gear on the cable drum 3, thereby allowing the cable drum 3 to rotate in any direction without resistance, that is, the cable drum 3 is unlocked, and the cable drum loses the pulling restriction force on the originally taut wire rope 2 wound thereon. Because the wire rope passes through the pulley, the wire rope 2 also loses control of the reset torsion spring 33 provided on the rocker arm 28. Under the action of the restoring force of the reset torsion spring, the rocker arm 28 is synchronously driven to be released, thereby completing the unlocking and release of the control actuator, and the state of the valve is changed.

[0019] After the electric fire protection and smoke exhaust valve close-range control actuator is unlocked and released, the reset process is divided into primary reset and secondary reset:

[0020] First-stage reset: Push the manual reset lever 11 extending from the extended lever arm 5 upward to move the pull rod 10 upward, driving the pull rod 10 to push upward (at this time, the extended lever arm 5 and the gear limit plate 4 are pulled up together by the pull rod, thereby clamping the cable drum 3), until it reaches the square opening 26 on the other end of the first lever 6, and the conical protrusion 22 on the lower edge of the limiting groove 21 of the second lever 7 is engaged, thereby clamping the second lever 7. At the same time, the second lever 7 is pulled to rotate clockwise, and its lower part reaches the outer step of the step structure 23 on the third lever 20 and is stuck, thereby completing the first-stage reset of the actuator;

[0021] Secondary reset: When the actuator has completed the primary reset, the stuck cable drum 3 can only rotate clockwise, but cannot rotate counterclockwise. Therefore, by rotating the knob 32 fixed on the cable drum 3, the wire rope 2 is driven to be wound and tightened on the cable drum 3, and then the rocker arm 28 is driven to rotate through the pulley, and then the state of the valve is changed through the action of the valve body connecting plug, completing the secondary reset of the actuator, that is, finally completing the reset of the actuator.

[0022] Due to the adoption of the above technical solution, the utility model has the following technical effects:

[0023] The utility model is a new type of electric fire prevention and smoke exhaust valve close-range control actuator with a more ingenious structure. Compared with the existing close-range control actuator, the labor-saving lever and the valve body main shaft lever are rigidly matched. When the valve body is opened and closed, a large impact is generated on the control actuator, which is easy to cause the control actuator and the internal structure to loosen, resulting in performance and work instability, high after-sales service rate and other problems. The close-range control actuator of the utility model has a thinner structure and uses multiple levers to greatly reduce the driving force and save driving energy consumption, so that it can be reset by turning the knob. The cooperation between the accessories is also very tight, so that it is not easy to disengage even in the face of vibration, and has good stability. It is more reliable when used for close-range control, has strong practicality, and saves energy and reduces consumption. Compared with existing old products, it has the following advantages:

[0024] 1. After utilizing the winch and rocker arm to save effort, the utility model adopts a knob reset to change the old product's long force arm reset, avoiding the old product often inadvertently causing harm to the operator during manual operation;

[0025] 2. It can be easily reset by using the winch and rocker arm to save effort;

[0026] 3. After using the winch and rocker arm to save effort, the valve body blades can achieve maximum engagement with each other when the valve body is closed again, which increases the airtightness and further reduces the air leakage of the fire damper. This changes the situation in which the old product can hardly ensure the airtight stability of the valve body after resetting with only a long force arm;

[0027] 4. The utility model adopts two valve body connecting inserts on the rocker arm to be directly connected to the valve body main shaft fixing plate, thereby avoiding the phenomenon that the main shaft slips after the valve body repeatedly moves after the old product uses internal screws to directly press the valve body main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0029] Figure 1This is a schematic diagram of the structure above the bottom plate in the released state of an embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the structure below the bottom plate in the released state of an embodiment of the utility model;

[0031] Figure 3 This is a schematic diagram of the structure below the bottom plate in the reset state of an embodiment of the utility model;

[0032] Figure 4 Schematic diagram of the structure of the first lever. DETAILED DESCRIPTION

[0033] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0034] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0035] like Figure 1-4 The figure shows an electric fire prevention and smoke exhaust valve short-range control actuator, comprising a base plate 1 and a lower structure and an upper structure arranged on the base plate 1 and cooperating with each other; the lower structure comprises a steel wire rope 2, a cable drum 3, a rocker 28, a rocker shaft 29, a pulley 30, and a fixed column 31, the cable drum 3 and the rocker shaft 29 are both arranged to penetrate the base plate 1, the rocker shaft 29 is located at the upper part of the base plate 1, and the cable drum 3 is located at the lower part of the base plate 1; a gear 38 and a knob 32 are fixedly sleeved on the part of the cable drum 3 protruding from the top of the base plate 1 in sequence from bottom to top, and the part of the cable drum 3 protruding from the bottom of the base plate 1 is fixedly connected to one end of the steel wire rope 2; the A return torsion spring 33 and a torsion spring limiting piece for limiting the return torsion spring 33 are sequentially sleeved on the portion of the rocker arm shaft 29 protruding above the base plate 1 from bottom to top; the portion of the rocker arm shaft 29 protruding below the base plate 1 is fixedly connected to one end of the rocker arm 28, and a valve body connecting insert 34 is also fixedly connected below this end of the rocker arm 28 for tightly and firmly engaging with the valve body main shaft fixing plate to achieve linkage; the pulley 30 is provided on the other end of the rocker arm 28; the fixing post 31 is fixedly provided on the base plate 1 and is located next to the cable drum 3; the other end of the wire rope 2 is fixedly connected to the fixing post 31 after being guided by the pulley 30 provided on the rocker arm 28;

[0036] The upper structure includes a third lever 20, a second lever 7, a first lever 6 and a pull rod 10 that are arranged in an annular manner in sequence for saving effort. The third lever 20 is driven by an electric drive, a manual drive or a temperature-controlled drive device as needed to release the second lever 7. The upper structure also includes a gear limit plate 4 and an extended force arm rod 5. The gear limit plate 4 and the extended force arm rod 5 are coaxially mounted on a base plate pillar next to the cable drum 3, and the gear limit plate 4 and the extended force arm rod 5 are coaxially mounted on a base plate pillar next to the cable drum 3, and the gear limit plate A torsion spring is provided between the position piece 4 and the extended lever arm 5. The end of the extended lever arm 5 is connected to a grooved clamping portion 15, and a manual reset lever 11 extends outward from the clamping portion 15. The other end of the gear limit piece 4 is configured to cooperate with the gear 38 fixed to the cable drum 3 to limit or release the cable drum 3. A clamping slot is provided at the lower end of the pull rod 10, and the pull rod 10 is continuously clamped and connected to the clamping portion 15 at the end of the extended lever arm 5 through the clamping slot. The linkage between the gear limit piece 4 and the extended lever arm 5 facilitates the gear limit piece 4 to be driven up and down by the extended lever arm 5, so that it can be driven by the extended lever arm 5 to perform an upward reset movement.

[0037] The second lever 7 is mounted on a pillar on the base plate 1 and is provided with a torsion spring. Its front end has a beveled limiting groove 21, and the end cooperates with the front end of the third lever 20. The lower edge of the limiting groove 21 is a conical protrusion 22 that is obliquely upward toward the first lever; the third lever 20 is mounted on a pillar on the base plate 1, and its front end has two step structures 23 that increase in height from the outside to the inside. The middle and rear ends are connected to an electric drive device 8, and a spring is provided at the connection to achieve driving by electric drive. On the outside of the step structure 23, a manual release rod 24 is also extended outward to achieve manual driving, so as to replace the electric drive device 8 to release the second lever 7 when manual operation is required; the first lever 6 is mounted on a pillar on the base plate 1 and is provided with a torsion spring, and its end facing the second lever 7 is at the end edge The first lever 6 and the second lever 7 are locked together by the tapered protrusion 22 of the second lever 7 and the square opening 26. The first lever 6 and the second lever 7 are locked together by the tapered protrusion 22 of the second lever 7 and the square opening 26. The other end of the first lever 6 is provided with a limiting groove 27. The pull rod 10 is fixed to the base plate 1 by passing through a pull rod fixing block 9 fixedly installed on the base plate 1. The upper end of the pull rod 10 is provided with a limiting block to prevent the upper end of the pull rod from escaping from the pull rod fixing block. The limiting block can be vertically matched with the limiting groove 27 of the first lever 6. The pull rod 10 is limited between the pull rod fixing block 9 and the groove, and a compression spring 13 is also arranged in series.

[0038] The electric fire and smoke damper proximity control actuator also includes a frame and a cover plate that cooperate with the base plate 1, allowing the lower and upper structures to be positioned within the box formed by the base plate 1, the frame, and the cover plate. The manual release lever 24, the manual reset lever 11, and the knob 32 are all positioned outside the box for ease of operation. Preferably, the manual release lever 24 and the manual reset lever 11 protrude from the frame, and at least the top end of the knob 32 protrudes from the cover plate.

[0039] The electric drive device 8 is an electromagnet.

[0040] The first lever 6 is a blade-shaped lever.

[0041] The knob 32 is a round knob.

[0042] The limiting slot 27 on the first lever 6 is an arc-shaped structure.

[0043] A rocker arm limit block 37 is provided on the bottom plate 1 next to the end of the rocker arm 28 to prevent the rocker arm 28 from excessively rotating and resetting.

[0044] A fusible tube device 35 and a fusible tube release torsion spring 36 that is blocked and restricted by the fusible tube device 35 are further provided on the base plate 1, next to the third lever 20. The fusible tube device 35 includes a fusible tube, which is passed through the base plate. The fusible tube release torsion spring 36 is blocked by the fusible tube limiter. When the fusible tube melts, the blocking restriction on the fusible tube release torsion spring 36 is lost, and the fusible tube release torsion spring 36 rotates to hit the third lever 20, thereby realizing the driving of the third lever 20 by the temperature control drive device.

[0045] The working principle of the control actuator is:

[0046] The process of unlocking and releasing the electric fire protection and smoke exhaust valve close-range control actuator is as follows:

[0047] The third lever 20 is driven by an electric, manual or temperature-controlled drive device to change to a released state, so that the states of the second lever 7, the first lever 6 and the pull rod 10 arranged in sequence are changed in sequence, thereby relaxing the control of the extension arm 5, and then allowing the gear limit plate 4 to release the restriction on the gear on the cable drum 3, thereby allowing the cable drum 3 to rotate in any direction without resistance, that is, the cable drum 3 is unlocked, and the cable drum loses the pulling restriction force on the originally taut wire rope 2 wound thereon. Because the wire rope passes through the pulley, the wire rope 2 also loses control of the reset torsion spring 33 provided on the rocker arm 28. Under the action of the restoring force of the reset torsion spring, the rocker arm 28 will be driven to rotate, that is, Figure 2 Rotate upward, thereby driving the valve body to rotate, thereby completing the unlocking and release of the control actuator and changing the state of the valve.

[0048] Specifically, the manual release lever 24 on the third lever 20 is pushed upward to release the second lever 7, or the electromagnet serving as the electric drive device 8 is energized to retract the third lever 20 to drive the retraction to release the second lever 7, or when the fusible tube on the fusible tube device 35 melts due to high temperature, the fusible tube release torsion spring 36 is released, causing it to hit the third lever 20 and retract it to release the second lever 7, and then the second lever 7 rotates counterclockwise under the action of the torsion spring, thereby the second lever 7 will release the first lever 6, and the other end of the first lever 6 will press the pull rod 10 downward under the action of the instantaneous release force of the compression spring 13, and then press down the lengthened force arm rod 5 and the gear limit plate 4, thereby releasing the cable drum 3.

[0049] After the electric fire protection and smoke exhaust valve close-range control actuator is unlocked and released, it is manually reset. The reset process is divided into primary reset and secondary reset:

[0050] First-stage reset: by pushing upward the manual reset lever 11 extending from the extended lever arm 5, the pull rod 10 is moved upward, driving the pull rod 10 to push upward (at this time, the extended lever arm 5 and the gear limit plate 4 are pushed upward together and pulled by the pull rod, thereby achieving the gear 38 fixedly sleeved on the winch drum 3 being clamped by the gear limit plate 4 and restored to the reset state, that is, the winch drum 3 is clamped and can only rotate in one direction), until the square opening 26 on the other end of the first lever 6 is pressed into the conical protrusion 22 on the lower edge of the limiting groove 21 of the second lever 7, thereby clamping the second lever 7. At the same time, the second lever 7 is pulled to rotate clockwise, and its lower part reaches the outer step of the step structure 23 on the third lever 20 and is stuck, thereby completing the first-stage reset of the actuator;

[0051] Secondary reset: When the actuator has completed the first-level reset, the stuck cable drum 3 can only rotate clockwise, but cannot rotate counterclockwise. Therefore, the wire rope 2 is wound around the cable drum 3 and tightened by rotating the knob 32 fixed on the cable drum 3 clockwise. Since the wire rope 2 passes through the pulley 30 provided on the rocker arm 28, and the other end of the wire rope is fixed to the fixed column 31, when the wire rope 2 is tightened, the rocker arm 28 can be driven to rotate through the pulley 30, that is, Figure 3 The valve body is rotated downward, and the state of the valve body is changed through the action of the valve body connecting insert 34 until it is closed or opened. At this point, the secondary reset of the actuator is completed, that is, the reset of the actuator is finally completed. Example

[0052] When the opening or closing action of the electric fire damper is realized electrically, that is, when the unlocking and releasing process of the electric fire damper and smoke exhaust damper close-range control actuator is realized electrically:

[0053] The working conditions are as follows: the electromagnet serving as the electric drive device 8 is energized and retracted, driving the third lever 20 to retract, thereby loosening the second lever 7 and releasing the front end limit of the first lever 6. The other end of the first lever 6 presses down the pull rod 10 under the action of the instantaneous release force of the compression spring 13, and then presses down the lengthened force arm rod 5 and the gear limit plate 4, thereby releasing the cable drum 3, so that the cable drum 3 can rotate freely, thereby losing the tension restriction on the wire rope 2, and then losing the tension restriction on the rocker arm 28. Under the action of the torque of the reset torsion spring 33 mounted above the rocker arm shaft 29, the rocker arm 28 is rotated, thereby driving the state of the valve body that rotates in conjunction with it through the valve body connecting plug 34 to change, thereby achieving closing or opening.

[0054] When the electric fire damper needs to be opened or closed manually, that is, when the unlocking and releasing process of the electric fire damper and smoke exhaust damper close-range control actuator is manually achieved:

[0055] The working conditions are as follows: the difference is that the manual release rod 24 on the third lever 20 is pushed upward to drive the third lever 20 to retract, and the rest of the actions are the same as those of the electric one.

[0056] When the opening or closing action of the electric fire damper is driven by the temperature control drive device, that is, when the unlocking and releasing process of the electric fire and smoke exhaust damper close-range control actuator is driven by the temperature control drive device:

[0057] The working conditions are as follows: the difference is that when the fusible tube on the fusible tube device 35 is melted by high temperature and loses control of the fusible tube release torsion spring 36, the fusible tube release torsion spring 36 will hit the third lever 20 and drive the third lever 20 to retract. The rest of the actions are the same as those of the electric one.

[0058] Working principle of releasing the cable drum 3 and resetting the stuck cable drum 3:

[0059] When releasing the cable drum 3, the manual release lever 24 on the third lever 20 is pushed upward to release the second lever 7 or the electromagnet serving as the electric drive device 8 is energized to retract and drive the third lever 20 to retract and release the second lever 7. The second lever 7 rotates counterclockwise under the action of the torsion spring, whereby the second lever 7 releases the first lever 6. The other end of the first lever 6 presses down the pull rod 10 under the action of the instantaneous release force of the compression spring 13, and then presses down the extended lever arm 5 and the gear limit plate 4, thereby releasing the cable drum 3; at the same time, the bottom of the second lever 7 will be stuck after reaching the inner step of the third lever 20 to prevent it from continuing to rotate counterclockwise, thereby facilitating the subsequent secondary reset.

[0060] When resetting the stuck cable drum 3, push the manual reset rod 11 extending from the extended lever arm 5 upward to drive 10 to push upward and compress the compression spring 13 (at this time the extended lever arm 5 and the gear limit plate 4 are pulled up, thereby achieving the jamming of the cable drum 3), until the open groove at the other end of the first lever 6 slides into the limiting groove of the second lever 7, and the conical protrusion of the second lever 7 is stuck in the square opening to jam the first lever 6. At the same time, the second lever 7 is pulled to rotate clockwise, and its bottom reaches the outer step of the step structure 23 on the third lever 20 and is stuck, completing the reset.

[0061] The utility model is a new type of electric fire prevention and smoke exhaust valve close-range control actuator with a more ingenious structure. Compared with the existing close-range control actuator, the labor-saving lever and the valve body main shaft lever are rigidly matched. When the valve body is opened and closed, a large impact is generated on the control actuator, which is easy to cause the control actuator and the internal structure to loosen, resulting in performance and work instability, high after-sales service rate and other problems. The close-range control actuator of the utility model has a thinner structure and uses multiple levers to greatly reduce the driving force and save driving energy consumption, so that it can be reset by turning the knob. The cooperation between the accessories is also very tight, so that it is not easy to disengage even in the face of vibration, and has good stability. It is more reliable when used for close-range control, has strong practicality, and saves energy and reduces consumption. Compared with existing old products, it has the following advantages:

[0062] 1. After utilizing the winch and rocker arm to save effort, the utility model adopts a knob reset to change the old product's long force arm reset, avoiding the old product often inadvertently causing harm to the operator during manual operation;

[0063] 2. It can be easily reset by using the winch and rocker arm to save effort;

[0064] 3. After using the winch and rocker arm to save effort, the valve body blades can achieve maximum engagement with each other when the valve body is closed again, which increases the airtightness and further reduces the air leakage of the fire damper. This changes the situation in which the old product can hardly ensure the airtight stability of the valve body after resetting with only a long force arm;

[0065] 4. The utility model adopts two valve body connecting inserts on the rocker arm to be directly connected to the valve body main shaft fixing plate, thereby avoiding the phenomenon that the main shaft slips after the valve body repeatedly moves after the old product uses internal screws to directly press the valve body main shaft.

[0066] The present invention is not limited to the aforementioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. Electric fire protection and smoke exhaust valve close control actuator, characterized by: The invention comprises a bottom plate (1) and a lower structure and an upper structure arranged on the bottom plate (1) and cooperating with each other; the lower structure comprises a steel wire rope (2), a winch drum (3), a rocker arm (28), a rocker arm shaft (29), a pulley (30), and a fixing column (31); the winch drum (3) and the rocker arm shaft (29) are both arranged to penetrate the bottom plate (1); the rocker arm shaft (29) is located at an upper position of the bottom plate (1), and the winch drum (3) is located at a lower position of the bottom plate (1); a gear (38) and a knob (32) are fixedly sleeved on the part of the winch drum (3) protruding above the bottom plate (1) in sequence from bottom to top; the part of the winch drum (3) protruding below the bottom plate (1) is fixedly connected to one end of the steel wire rope (2); the rocker arm shaft (29) protrudes A return torsion spring (33) and a torsion spring limiting piece for limiting the return torsion spring (33) are sequentially sleeved on the portion above the bottom plate (1) from bottom to top; the portion of the rocker arm shaft (29) protruding below the bottom plate (1) is fixedly connected to one end of the rocker arm (28), and a valve body connecting plug (34) for tightly and firmly fitting with the valve body main shaft fixing plate to achieve linkage is also fixedly connected below this end of the rocker arm (28); the pulley (30) is arranged on the other end of the rocker arm (28); the fixed column (31) is fixedly arranged on the bottom plate (1) and is located next to the cable drum (3); the other end of the wire rope (2) is fixedly connected to the fixed column (31) after being guided by the pulley (30) arranged on the rocker arm (28); The upper structure comprises a third lever (20), a second lever (7), a first lever (6) and a pull rod (10) which are arranged in an annular manner for saving effort. The third lever (20) is driven by an electric drive, a manual drive or a temperature-controlled drive device as needed to release the second lever (7). The upper structure also comprises a gear limit plate (4) and an extended force arm rod (5). The gear limit plate (4) and the extended force arm rod (5) are coaxially mounted on a bottom plate support column located next to the cable drum (3). The gear limit plate ( 4) and the extended lever arm (5), a torsion spring is provided between the extended lever arm (5), the end of the extended lever arm (5) is connected to a clamping portion (15) with a groove, and a manual reset rod (11) is extended outward from the clamping portion (15), the other end of the gear limiting piece (4) is configured to cooperate with a gear (38) fixed on the cable drum (3) so as to limit or release the cable drum (3), and a clamping slot is provided at the lower end of the pulling rod (10), and the pulling rod (10) is always clamped and connected with the clamping portion (15) at the end of the extended lever arm (5) through the clamping slot.

2. The electric fire protection and smoke exhaust valve close-range control actuator according to claim 1 is characterized in that: The second lever (7) is mounted on a pillar on the base plate (1) and is provided with a torsion spring. The front end of the second lever (7) is provided with a limiting groove (21) with an oblique mouth, and the end thereof cooperates with the front end of the third lever (20). The lower edge of the limiting groove (21) is a tapered protrusion (22) obliquely facing upwards toward the first lever; the third lever (20) is mounted on a pillar on the base plate (1), and the front end thereof is provided with two step structures (23) that increase in height from the outside to the inside. The middle and rear ends are connected to an electric drive device (8), and a spring is provided at the connection to achieve driving by electric drive. The outer side of the step structure (23) also extends outward with a manual release rod (24) to achieve driving by manual drive, so as to replace the electric drive device (8) to release the second lever (7) when manual operation is required; the first lever (6) is mounted on a pillar on the base plate (1) and is provided with a torsion spring, and the end thereof facing the second lever (7) is provided with a spring on the end edge. The opening groove (25) of the lever (7) is provided with a square opening (26) at the end thereof near the opening groove (25). The opening groove (25) can be inserted into the limiting groove (21) of the second lever (7), and the conical protrusion (22) of the second lever (7) can be inserted into the square opening (26). Thus, the first lever (6) and the second lever (7) can be inserted together by the cooperation of the conical protrusion (22) of the second lever (7) and the square opening (26). ) is provided with a limiting slot (27) on the other end of the first lever (6), the pulling rod (10) is fixed to the base plate (1) by passing through a pulling rod fixing block (9) fixedly mounted on the base plate (1), and a limiting block is provided at the upper end of the pulling rod (10) to prevent the upper end of the pulling rod from escaping from the pulling rod fixing block, and the limiting block can be vertically matched with the limiting slot (27) of the first lever (6), and the upper end of the pulling rod (10) is limited between the pulling rod fixing block (9) and the slot, and a compression spring (13) is also provided in series.

3. The electric fire protection and smoke exhaust valve close-range control actuator according to claim 2 is characterized in that: The electric drive device (8) is an electromagnet.

4. The electric fire protection and smoke exhaust valve close-range control actuator according to claim 2 is characterized in that: The electric fire prevention and smoke exhaust valve short-range control actuator further comprises a frame and a cover plate matched with the base plate (1), for allowing the lower structure and the upper structure to be arranged in a box body surrounded by the base plate (1), the frame and the cover plate, and the manual release rod (24) and the manual reset rod (11) both protrude outside the frame, and at least the top end of the knob (32) protrudes outside the cover plate.

5. The electric fire protection and smoke exhaust valve short-range control actuator according to claim 1 is characterized in that: The knob (32) is a circular knob.

6. The electric fire protection and smoke exhaust valve close-range control actuator according to claim 1 is characterized in that: A rocker arm stop block (37) is also provided on the bottom plate (1) beside the end of the rocker arm (28) to prevent the rocker arm (28) from excessively rotating and resetting.

7. The electric fire protection and smoke exhaust valve short-range control actuator according to claim 1 is characterized in that: A fusible tube device (35) and a fusible tube release torsion spring (36) that is blocked and restricted by the fusible tube device (35) are also provided on the bottom plate (1) and beside the third lever (20). The fusible tube device (35) includes a fusible tube that is passed through the bottom plate. The fusible tube release torsion spring (36) is blocked by the fusible tube.

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