Static pressure box for fire-fighting smoke exhaust fan

Abstract

The invention belongs to the technical field of plenum chambers, and particularly relates to a plenum chamber for a fire-fighting smoke exhaust fan, the plenum chamber comprises a shell, the shell is composed of a mounting shell, a conical air outlet, a conical outer baffle, a conical inner baffle and an L-shaped pipe, and a bottom plate with a notch in the middle is fixedly mounted at the bottom of the mounting shell; four adjusting sliding plates are mounted on the upper side of the bottom plate in a sliding manner; the four trigger sliding plates are slidably mounted on the upper side of the bottom plate and are circumferentially staggered with the four adjusting sliding plates; the adjusting sliding plate and the triggering sliding plate which are adjacent are connected through a connecting piece; a regulation and control mechanism is installed between every two adjacent adjusting sliding plates. In the specific using process, when discharged air flow is disturbed, the space between the adjusting sliding plate and the triggering sliding plate is enlarged by adjusting the adjusting sliding plate and the triggering sliding plate, the impact force of disturbed air flow on the adjusting sliding plate and the triggering sliding plate is reduced, and therefore noise caused by disturbance of the air flow in the using process is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of static pressure boxes, and particularly relates to a static pressure box for a fire exhaust fan. Background Art

[0002] A static pressure box is a necessary accessory for a ventilation system to reduce dynamic pressure, increase static pressure, stabilize air flow and reduce air flow vibration, and it can make the ventilation effect more ideal. A static pressure box is a device that can allow air flow to pass through and effectively prevent or weaken the outward propagation of sound energy.

[0003] During the specific use process, if the transported gas has a disturbance phenomenon, for a traditional static pressure box, the impact force of the disturbed gas on the wall surface of the expansion area of the static pressure box will change. Because the expanded volume of the box body is fixed, the change in the impact force will cause the wall surface of the expansion area of the static pressure box to make a sound and generate noise; for places with relatively strict noise requirements, the traditional static pressure box cannot meet the requirement of automatically adjusting the size of the expansion area to reduce noise when there is an air flow disturbance.

[0004] In addition, the noise requirements of fixed places are also different at different time periods. Because the expanded volume of the traditional static pressure box is fixed, it cannot adjust autonomously according to the noise requirements at different time periods.

[0005] The present invention designs a static pressure box for a fire exhaust fan to solve the above problems. Summary of the Invention

[0006] Based on this, in view of the problems existing in the current static pressure box, it is necessary to provide a static pressure box for a fire exhaust fan. During the specific use process, when the discharged air flow has a disturbance, by adjusting the adjusting slide plate and the trigger slide plate, the space between the adjusting slide plate and the trigger slide plate becomes larger, reducing the impact force of the disturbed air flow on the adjusting slide plate and the trigger slide plate, thereby reducing the noise caused by the air flow disturbance during the use process.

[0007] The above object is achieved by the following technical solutions: A static pressure box for a fire exhaust fan, which comprises: A housing, which is composed of a mounting shell, a conical air outlet installed at the upper end of the mounting shell, a conical outer baffle and a conical inner baffle installed at the lower end of the mounting shell, and an L-shaped pipe installed at the lower sides of the conical outer baffle and the conical inner baffle. A bottom plate with a notch in the middle is fixedly installed at the bottom of the mounting shell.

[0008] Four adjusting slides are slidably mounted on the upper side of the bottom plate, and first return springs are fixedly mounted between the four adjusting slides and the inner wall surface of the mounting shell; four trigger slides are slidably mounted on the upper side of the bottom plate and are circumferentially staggered with the four adjusting slides, and second return springs are fixedly mounted between the four trigger slides and the inner wall surface of the mounting shell; an adjacent adjusting slide and a trigger slide are connected by a connecting member.

[0009] A control mechanism is mounted between two adjacent adjusting slides.

[0010] The control mechanism includes a winding wheel, a volute spring, a movable pulley, a fixed pulley, and a transmission belt. Two winding wheels are symmetrically rotatably mounted on both sides of the upper end of the adjusting slide, and a volute spring is mounted between the winding wheel and the corresponding adjusting slide; an installation groove is formed at the upper end of the trigger slide, and two movable pulleys are rotatably mounted in the installation groove; four first fixed supports are fixedly mounted in the mounting shell and are located above the four trigger slides, and three fixed pulleys are rotatably mounted on the lower side of each end of the fixed support; two winding wheels mounted on the adjacent ends of the two adjacent adjusting slides are connected by a transmission belt, and the transmission belt bypasses the two movable pulleys mounted on the trigger slide between the two adjusting slides and the three fixed pulleys mounted on the corresponding first fixed support; the adjusting slide and the mounting shell are connected by a gear and a rack.

[0011] In one embodiment, two first guiding slide bars are symmetrically and vertically distributed and fixedly mounted on the back surface of each adjusting slide, and the ends of the two first guiding slide bars away from the adjusting slide pass through the corresponding wall surface of the mounting shell and are slidably engaged with the wall surface; the upper end of the conical inner baffle is fixedly connected to the edge of the notch in the middle of the bottom plate.

[0012] Two second guiding slide bars are symmetrically and vertically distributed and fixedly mounted on the back surface of each trigger slide, and the ends of the two second guiding slide bars away from the trigger slide pass through the wall surface of the mounting shell and are slidably engaged with the mounting shell.

[0013] In one embodiment, the connecting member is composed of an elastic band and two fixing strips fixedly mounted at both ends of the elastic band, and the elastic band is fixedly mounted on the corresponding adjusting slide and trigger slide through the two fixing strips at both ends.

[0014] In one embodiment, the upper end of the vertical pipe of the L-shaped pipe is fixedly connected to the lower ends of the conical outer baffle and the conical inner baffle, and annular drainage plates are uniformly distributed from the inside to the outside and fixedly mounted in the vertical pipe of the L-shaped pipe.

[0015] In one embodiment, the end of the horizontal pipe of the L-shaped pipe away from the vertical pipe is an air inlet end, and a spiral drainage piece is fixedly mounted in the horizontal pipe of the L-shaped pipe.

[0016] In one of the embodiments, an anti-arcing plate is fixedly mounted on the fixed pulley to prevent the transmission belt from disengaging.

[0017] In one embodiment, the regulating mechanism further includes a first gear, a fixed rack, a fixed shell, a first rotating shaft, a regulating volute spring, a second rotating shaft, a third fixed support, a fourth fixed support, a limiting rod, a third gear, a fifth fixed support, a fourth gear, and a gear ring, wherein the winding wheel is rotatably mounted on the regulating slide plate through the first rotating shaft, and the upper end of the first rotating shaft passes through the corresponding regulating slide plate and is fixedly mounted with the first gear; the fixed shell is fixedly mounted on the corresponding adjusting slide plate through the third fixed support and the fifth fixed support; the second rotating shaft is rotatably mounted on the third fixed support and the fifth fixed support and the second rotating shaft passes through the fixed shell, and the lower end of the second rotating shaft is fixedly mounted with the third gear, and the third gear is meshed with the first gear; a regulating volute spring is installed between the second rotating shaft and the fixed shell; a gear ring is rotatably mounted on the outer circumferential surface of the fixed shell, and a limiting rod is slidably mounted on the gear ring through threaded cooperation; the limiting rod cooperates with the outer layer of the regulating volute spring, and the position of the connection point between the outer layer of the regulating volute spring and the fixed shell can be controlled by the limiting rod; the lower end of the fixed shell is fixedly mounted with the fourth gear, and the fixed rack is fixedly mounted in the mounting shell, and the fixed rack is meshed with the fourth gear.

[0018] In one of the embodiments, the second servo motor is fixedly mounted on the gear ring via a fourth fixed support, and the output shaft of the second servo motor is fixedly connected to the limiting rod.

[0019] In one of the embodiments, the first servo motor is fixedly mounted on the fixed housing via a second fixed support, a second gear is fixedly mounted on the output shaft of the first servo motor, and the second gear is meshed with the gear ring.

[0020] In one of the embodiments, the outer layer of the regulating spiral spring has teeth, and one end of the limiting rod that penetrates into the fixed shell cooperates with the teeth of the outer layer of the regulating spiral spring.

[0021] Compared with the prior art, the advantages of the present invention are: 1. When the exhausted airflow is disturbed during use, the present invention increases the space between the adjusting slide and the triggering slide by adjusting the adjusting slide and the triggering slide, thereby reducing the impact force of the disturbed airflow on the adjusting slide and the triggering slide, thereby reducing the noise caused by the disturbance of the airflow during use.

[0022] 2. By controlling the circumferential rotation and sliding of the limit rod, the present invention can control the mating position between the end of the limit rod penetrating into the fixed housing and the teeth on the outer layer of the regulating spiral spring, that is, control the compression ability of the regulating spiral spring, that is, control the angle of rotation of the second rotating shaft required to drive the fixed housing to rotate through the regulating spiral spring; in this way, the sliding distances of the regulating slide plate and the trigger slide plate under different impact forces of the disturbing air flow can be adjusted according to the noise requirements of the equipment installation site, that is, the different requirements for the spatial change between the regulating slide plate and the trigger slide plate can be adjusted according to the different noise requirements of the equipment installation site. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall component appearance.

[0024] Figure 2 is a schematic diagram of the overall component distribution.

[0025] Figure 3 is a schematic diagram of the housing structure.

[0026] Figure 4 is a schematic diagram of the installation of the drainage plate.

[0027] Figure 5 is a schematic diagram of the distribution of the regulating mechanism.

[0028] Figure 6 is a schematic diagram of the installation of the regulating slide plate.

[0029] Figure 7 is a schematic diagram of the installation of the connecting piece.

[0030] Figure 8 is a schematic diagram of the installation of the fixed pulley and the movable pulley.

[0031] Figure 9 is a schematic diagram of the structure of the connecting piece.

[0032] Figure 10 is a schematic diagram of the installation of the transmission belt.

[0033] Figure 11 is a schematic diagram of the installation of the fixed pulley.

[0034] Figure 12 is a schematic diagram of the structure of the trigger slide plate.

[0035] Figure 13 is a schematic diagram of the installation of the fixed rack.

[0036] Figure 14 is a schematic diagram of the structure of the regulating mechanism.

[0037] Figure 15 is a schematic diagram of the installation of the first servo motor and the second servo motor.

[0038] Figure 16 It is a schematic diagram of the cooperation between the limit rod and the regulating spiral spring.

[0039] Figure 17 It is a schematic diagram of the installation of the spiral spring.

[0040] Names of the reference numerals in the figure: 1. Outer shell; 2. Trigger slide plate; 3. First guiding slide rod; 4. Second guiding slide rod; 5. Connecting piece; 6. Adjusting slide plate; 7. Regulating mechanism; 8. First return spring; 1001. Conical air outlet; 1002. Installation shell; 1003. Base plate; 1005. Conical outer baffle; 1006. Conical inner baffle; 1007. Drainage plate; 1008. L-shaped pipe; 1009. Spiral drainage piece; 2001. Installation groove 5001. Elastic band; 5002. Fixed strip 7001. Transmission belt; 7002. Winding wheel; 7003. Movable pulley; 7004. Fixed pulley; 7005. First fixed support; 7006. First gear; 7007. Anti-disengagement arc plate; 7008. Fixed rack; 7009. Fixed shell; 7010. First rotating shaft; 7011. Second fixed support; 7012. First servo motor; 7013. Second gear; 7014. Regulating spiral spring; 7015. Second rotating shaft; 7016. Third fixed support; 7017. Fourth fixed support; 7018. Second servo motor; 7019. Limit rod; 7020. Third gear; 7021. Fifth fixed support; 7022. Fourth gear; 7023. Tooth ring; 7024. Limit tooth; 7025. Spiral spring; 7026. Second return spring. Specific embodiments

[0041] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] The serial numbers assigned to the components in this text itself, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in this application, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0043] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0044] As Figure 1 - As Figure 16 shown, a static pressure box for a fire smoke exhaust fan, as Figure 1 shown, it includes a housing 1, as Figure 3 shown, the housing 1 is composed of a mounting shell 1002, a conical air outlet 1001 installed at the upper end of the mounting shell 1002, a conical outer baffle 1005 and a conical inner baffle 1006 installed at the lower end of the mounting shell 1002, and an L-shaped pipe 1008 installed on the lower sides of the conical outer baffle 1005 and the conical inner baffle 1006. A bottom plate 1003 with a notch in the middle is fixedly installed at the bottom of the mounting shell 1002; four adjusting sliding plates 6 are slidably installed on the upper side of the bottom plate 1003, as Figure 1 、 2 、5、6 shown, a first return spring 8 is fixedly installed between the four adjusting sliding plates 6 and the inner wall surface of the mounting shell 1002; four trigger sliding plates 2 are slidably installed on the upper side of the bottom plate 1003 and are circumferentially staggered with the four adjusting sliding plates 6, as Figure 1 、 5 shown, a second return spring 7026 is fixedly installed between the four trigger sliding plates 2 and the inner wall surface of the mounting shell 1002; as Figure 6 shown, an adjacent adjusting sliding plate 6 and trigger sliding plate 2 are connected by a connecting piece 5.

[0045] The function of the first return spring 8 is to return the four adjustment slides 6, and the function of the second return spring 7026 is to return the four trigger slides 2; the pressure of the second return spring 7026 is less than the pressure of the first return spring 8; when the four adjustment slides 6 are in the initial state, the lower ends of the four adjustment slides 6 are flush with the edge of the middle notch of the bottom plate 1003. At this time, the space between the four adjustment slides 6 is in the smallest adjustable state of the device; at this time, the lower ends of the four trigger slides 2 are flush with the edge of the middle notch of the bottom plate 1003; when adjusting the four trigger slides 2 and the four adjustment slides 6 to slide outwards, the corresponding first return spring 8 and second return spring 7026 are compressed; during the adjustment process, when the four trigger slides 2 and the four adjustment slides 6 slide inwards from the outside, the first return spring 8 will provide a return power for the four adjustment slides 6; the second return spring 7026 will provide a return power for the four trigger slides 2.

[0046] At the lower end of the mounting shell 1002 of the present invention, two layers of plates, namely a conical outer baffle 1005 and a conical inner baffle 1006, are provided, and the mounting shell 1002 and the adjustment slide 6 and the trigger slide 2 also form two inner and outer layers. When vibration occurs, generally the inner layer plate will vibrate, and the outer layer plate vibrates relatively less, which can also play a role in reducing noise to a certain extent.

[0047] As Figure 5 shown, a control mechanism 7 is installed between two adjacent adjustment slides 6.

[0048] As Figure 8 、 13 、14, 15 shown, the control mechanism 7 includes a winding wheel 7002, a volute spring 7025, a movable pulley 7003, a fixed pulley 7004, and a transmission belt 7001. Among them, two winding wheels 7002 are symmetrically and rotatably installed on both sides of the upper end of the adjustment slide 6. As Figure 17 shown, a volute spring 7025 is installed between the winding wheel 7002 and the corresponding adjustment slide 6; as Figure 12 shown, an installation groove 2001 is opened at the upper end of the trigger slide 2, and two movable pulleys 7003 are rotatably installed in the installation groove 2001; four first fixed supports 7005 are fixedly installed in the mounting shell 1002 and are located above the four trigger slides 2. As Figure 11 shown, three fixed pulleys 7004 are rotatably installed on the lower side of one end of each fixed support; as Figure 8 、 10As shown, two winding wheels 7002 installed at the adjacent ends of two adjacent adjusting sliding plates 6 are connected by a transmission belt 7001. The transmission belt 7001 bypasses two movable pulleys 7003 installed on the trigger sliding plate 2 between the two adjusting sliding plates 6 and three fixed pulleys 7004 installed on the corresponding first fixed support 7005; the adjusting sliding plate 6 and the installation shell 1002 are connected by a gear and rack transmission.

[0049] The function of the scroll spring is to reset the eight winding wheels 7002; when adjusting the four trigger sliding plates 2 and the four adjusting sliding plates 6 to slide outwards, the corresponding scroll springs are compressed, and the winding wheels 7002 rotate to release the transmission belt 7001; during the adjustment process, when the four trigger sliding plates 2 and the four adjusting sliding plates 6 slide inwards from the outside for adjustment, under the action of the corresponding scroll springs, the winding wheels 7002 rotate in the reverse direction to wind and collect the transmission belt 7001.

[0050] In the present invention, the design of the movable pulley 7003 and the fixed pulley 7004 can magnify the transmission ratio between the trigger sliding plate 2 and the adjusting sliding plate 6; on the basis of the small stroke of the trigger sliding plate 2 sliding, through the design of the fixed pulley 7004 and the movable pulley 7003, the length of the transmission belt 7001 pulled out from the winding wheel 7002 is magnified, and the rotation angle of the winding wheel 7002 is magnified, so as to ensure that the adjusting sliding plate 6 has sufficient driving force for sliding and ensure the smooth sliding of the adjusting sliding plate 6.

[0051] In a further embodiment, as Figure 1 、 2 shown in FIG. 5, two first guiding slide bars 3 symmetrically distributed up and down are fixedly installed on the back of each adjusting sliding plate 6. The ends of the two first guiding slide bars 3 far from the adjusting sliding plate 6 pass through the corresponding wall surface of the installation shell 1002 and are slidably matched with the wall surface; the upper end of the conical inner baffle 1006 is fixedly connected to the edge of the notch in the middle of the bottom plate 1003. The function of the first guiding slide bar 3 is to guide the corresponding adjusting sliding plate 6.

[0052] As Figure 1 、 5 shown in FIG., two second guiding slide bars 4 symmetrically distributed up and down are fixedly installed on the back of each trigger sliding plate 2. The ends of the two second guiding slide bars 4 far from the trigger sliding plate 2 pass through the wall surface of the installation shell 1002 and are slidably matched with the installation shell 1002. The function of the second guiding slide bar 4 is to guide the corresponding trigger sliding plate 2.

[0053] In a further embodiment, as Figure 9As shown, the connecting member 5 is composed of an elastic band 5001 and two fixing bars 5002 fixedly installed at both ends of the elastic band 5001. The elastic band 5001 is fixedly installed on the corresponding adjusting slide plate 6 and trigger slide plate 2 through the two fixing bars 5002 at both ends. The function of designing the elastic band 5001 is to ensure that when the four adjusting slide plates 6 slide outward or inward, the elastic band 5001 can play a role in blocking and sealing the gap between adjacent adjusting slide plates 6; in addition, in the present invention, two fixing bars 5002 are designed at both ends of the elastic band 5001, and the fixing bars 5002 are fixedly installed at positions on the corresponding adjusting slide plate 6 and trigger slide plate 2 far from the middle gap. Such a design can ensure the width of the elastic band 5001 and ensure that the expansion and contraction amount of the elastic band 5001 can adapt to the sliding amplitude of the four adjusting slide plates 6 outward; ensure the adjustment effect.

[0054] In a further embodiment, as Figure 3 , 4 As shown, the upper end of the vertical pipe of the L-shaped pipe 1008 is fixedly connected to the lower ends of the conical outer baffle 1005 and the conical inner baffle 1006. An annular drainage plate 1007 evenly distributed from the inside to the outside is fixedly installed in the vertical pipe of the L-shaped pipe 1008. The function of the annular drainage plate 1007 is to play a role in guiding the gas flowing through the vertical pipe of the L-shaped pipe 1008, ensuring that the gas passing through the vertical pipe of the L-shaped pipe 1008 can flow into the conical inner baffle 1006 smoothly; preventing the phenomenon of turbulent flow in the flowing air current and generating noise.

[0055] In a further embodiment, as Figure 3 As shown, one end of the horizontal pipe of the L-shaped pipe 1008 far from the vertical pipe is the air inlet end, and a spiral drainage piece 1009 is fixedly installed in the horizontal pipe of the L-shaped pipe 1008. The function of the spiral drainage piece 1009 is to increase the flow stroke of the air current passing through the horizontal pipe of the L-shaped pipe 1008 and reduce the impact force of the air current on the pipe wall, thereby achieving the effect of reducing noise.

[0056] In a further embodiment, as Figure 10 , 11 As shown, an anti-disengagement arc plate 7007 for preventing the transmission belt 7001 from disengaging is fixedly installed on the fixed pulley 7004.

[0057] In a further embodiment, as Figure 14 , 15As shown, the control mechanism 7 further includes a first gear 7006, a fixed rack 7008, a fixed housing 7009, a first rotating shaft 7010, a control spiral spring 7014, a second rotating shaft 7015, a third fixed support 7016, a fourth fixed support 7017, a limiting rod 7019, a third gear 7020, a fifth fixed support 7021, a fourth gear 7022, and a toothed ring 7023. Among them, the winding wheel 7002 is rotatably installed on the adjusting slide plate 6 through the first rotating shaft 7010, and the upper end of the first rotating shaft 7010 passes through the corresponding adjusting slide plate 6 and is fixedly installed with the first gear 7006; the fixed housing 7009 is fixedly installed on the corresponding adjusting slide plate 6 through the third fixed support 7016 and the fifth fixed support 7021; the second rotating shaft 7015 is rotatably installed on the third fixed support 7016 and the fifth fixed support 7021 and the second rotating shaft 7015 passes through the fixed housing 7009, and the lower end of the second rotating shaft 7015 is fixedly installed with the third gear 7020, and the third gear 7020 meshes with the first gear 7006; a control spiral spring 7014 is installed between the second rotating shaft 7015 and the fixed housing 7009; the toothed ring 7023 is rotatably installed on the outer circumferential surface of the fixed housing 7009, and the limiting rod 7019 is slidably installed on the toothed ring 7023 by thread fit; the limiting rod 7019 cooperates with the outer layer of the control spiral spring 7014, and the position of the connection point between the outer layer of the control spiral spring 7014 and the fixed housing 7009 can be controlled through the limiting rod 7019; the lower end of the fixed housing 7009 is fixedly installed with the fourth gear 7022, the fixed rack 7008 is fixedly installed in the installation housing 1002, and the fixed rack 7008 meshes with the fourth gear 7022.

[0058] During use, when the air flow is disturbed, the impact force of the air flow entering between the adjustment slide plate 6 and the trigger slide plate 2 on the adjustment slide plate 6 and the trigger slide plate 2 will increase. At this time, because the pressure of the first return spring 8 installed on the adjustment slide plate 6 is greater than the pressure of the second return spring 7026 installed on the trigger slide plate 2, the trigger slide plate 2 will be first squeezed and slide. The sliding of the trigger slide plate 2 drives the corresponding movable pulley 7003 to slide. The sliding of the movable pulley 7003 will pull the transmission belt 7001. When the transmission belt 7001 is pulled, it will drive the winding wheel 7002 to rotate. When the winding wheel 7002 is pulled and rotated, the winding wheel 7002 will drive the first rotating shaft 7010 to rotate. The rotation of the first rotating shaft 7010 drives the first gear 7006 to rotate. The rotation of the first gear 7006 drives the third gear 7020 to rotate. The rotation of the third gear 7020 drives the second rotating shaft 7015 to rotate. The rotation of the second rotating shaft 7015 drives the limit rod 7019 to rotate circumferentially around the fixed housing 7009 through the regulating spiral spring 7014. The rotation of the limit rod 7019 drives the fixed housing 7009 to rotate. The rotation of the fixed housing 7009 drives the tooth ring 7023 to rotate; because the tooth ring 7023 meshes with the fixed rack 7008 fixedly installed in the installation housing 1002; under the action of the fixed rack 7008, when the tooth ring 7023 rotates, the tooth ring 7023 will drive the fixed housing 7009 to slide relative to the installation housing 1002. The sliding of the fixed housing 7009 drives the corresponding adjustment slide plate 6 to slide relative to the installation housing 1002 through the third fixed support 7016 and the fifth fixed support 7021, realizing the adjustment of the adjustment slide plate 6; by adjusting the adjustment slide plate 6 and the trigger slide plate 2, the space between the adjustment slide plate 6 and the trigger slide plate 2 becomes larger; during the specific use process, when the discharged air flow is disturbed, by adjusting the adjustment slide plate 6 and the trigger slide plate 2, the space between the adjustment slide plate 6 and the trigger slide plate 2 becomes larger, reducing the impact force of the disturbed air flow on the adjustment slide plate 6 and the trigger slide plate 2, thereby reducing the noise caused by the disturbance of the air flow during use.

[0059] In a further embodiment, as Figure 13 、 14 、shown in Figure 15, the second servo motor 7018 is fixedly installed on the tooth ring 7023 through the fourth fixed support 7017, and the output shaft of the second servo motor 7018 is fixedly connected to the limit rod 7019.

[0060] In a further embodiment, as Figure 13 、 14 、shown in Figure 15, the first servo motor 7012 is fixedly installed on the fixed housing 7009 through the second fixed support 7011. A second gear 7013 is fixedly installed on the output shaft of the first servo motor 7012, and the second gear 7013 meshes with the tooth ring 7023.

[0061] In a further embodiment, asFigure 16 As shown, the outer layer of the regulating spiral spring 7014 has teeth, and one end of the limiting rod 7019 passing through the fixed housing 7009 is engaged with the teeth on the outer layer of the regulating spiral spring 7014.

[0062] The rotation of the limiting rod 7019 can be controlled by the second servo motor 7018. Since the limiting rod 7019 is installed on the tooth ring 7023 by threaded connection, when the limiting rod 7019 rotates, the limiting rod 7019 will slide relative to the tooth ring 7023 under the action of the thread. When the first servo motor 7012 works, the first servo motor 7012 will drive the second gear 7013 to rotate, and the rotation of the second gear 7013 will drive the tooth ring 7023 to rotate circumferentially around the fixed housing 7009; the rotation of the tooth ring 7023 will drive the limiting rod 7019 to rotate circumferentially around the fixed housing 7009. As can be seen from the above, the circumferential rotation and sliding of the limiting rod 7019 relative to the fixed housing 7009 can be controlled by the first servo motor 7012 and the second servo motor 7018. By controlling the circumferential rotation and sliding of the limiting rod 7019, the mating position between the end of the limiting rod 7019 passing through the fixed housing 7009 and the teeth on the outer layer of the regulating spiral spring 7014 can be controlled, that is, the ability of the regulating spiral spring 7014 to be compressed can be controlled, that is, the ability to control how many degrees the second rotating shaft 7015 rotates to drive the fixed housing 7009 to rotate through the regulating spiral spring 7014; in this way, the sliding distances of the regulating slide plate 6 and the trigger slide plate 2 under different impact forces of the disturbing air flow can be adjusted according to the noise requirements of the equipment installation site, that is, the different requirements for the spatial change between the regulating slide plate 6 and the trigger slide plate 2 can be adjusted according to the different noise requirements of the equipment installation site.

[0063] In the present invention, a conical air outlet 1001 is installed at the upper end of the installation housing 1002, and the discharged gas will finally be discharged from the conical air outlet 1001. The lower end of the conical air outlet 1001 is a plane with a gap between it and the upper end of the installation housing 1002. The regulating mechanism 7 is installed at this gap. During the specific use process, when the air flow flows upward, part of the gas will flow into this gap. However, when the gap is filled with the air flow in the gap, the air flow will no longer enter this gap, and the air flow in this gap reaches a stable state and will not affect the normal air flow.

[0064] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0065] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A static pressure box for a fire smoke exhaust fan, characterized in that: It includes The outer shell is composed of a mounting shell, a conical air outlet, a conical outer baffle, a conical inner baffle and an L-shaped tube. A bottom plate with a notch in the middle is fixedly mounted on the bottom of the mounting shell; Four adjusting slides are slidably mounted on the upper side of the bottom plate, and a first return spring is fixedly mounted between the four adjusting slides and the inner wall of the mounting shell; four trigger slides are slidably mounted on the upper side of the bottom plate and are circumferentially staggered with the four adjusting slides; a second return spring is fixedly mounted between the four trigger slides and the inner wall of the mounting shell; adjacent adjusting slides and trigger slides are connected by a connecting piece; A regulating mechanism is installed between two adjacent regulating slide plates; The regulating mechanism comprises a winding wheel, a movable pulley, a fixed pulley and a transmission belt, wherein two winding wheels are symmetrically rotatably installed on both sides of the upper end of the adjusting slide, and a spiral spring is installed between the winding wheel and the corresponding adjusting slide; an installation groove is opened on the upper end of the triggering slide, and two movable pulleys are rotatably installed in the installation groove; four first fixed supports are fixedly installed in the mounting shell and are located on the upper side of the four triggering slides, and three fixed pulleys are rotatably installed on the lower side of one end of each fixed support; the two winding wheels installed at the ends close to each other of two adjacent adjusting slides are connected by a transmission belt, and the transmission belt bypasses the two movable pulleys installed on the triggering slide between the two adjusting slides and the three fixed pulleys installed on the corresponding first fixed supports; the adjusting slide and the mounting shell are connected by gear and rack transmission.

2. The static pressure box for a fire smoke exhaust fan according to claim 1, characterized in that: Two first guide slide bars symmetrically distributed up and down are fixedly installed on the back of each adjusting slide plate, and one end of the two first guide slide bars away from the adjusting slide plate passes through the corresponding wall surface of the mounting shell and slides with the wall surface; the upper end of the conical inner baffle is fixedly connected to the edge of the notch in the middle of the bottom plate; Two second guide slide bars symmetrically distributed up and down are fixedly mounted on the back of each trigger slide plate, and one end of the two second guide slide bars away from the trigger slide plate passes through the wall surface of the mounting shell and is slidably matched with the mounting shell.

3. The static pressure box for a fire smoke exhaust fan according to claim 1, characterized in that: The connecting piece is composed of an elastic band and two fixing strips fixedly installed at both ends of the elastic band. The elastic band is fixedly installed on the corresponding adjusting slide plate and triggering slide plate through the two fixing strips at both ends.

4. The static pressure box for a fire smoke exhaust fan according to claim 1, characterized in that: The upper end of the vertical pipe of the L-shaped pipe is fixedly connected to the lower ends of the conical outer baffle plate and the conical inner baffle plate, and an annular guide plate evenly distributed from inside to outside is fixedly installed in the vertical pipe of the L-shaped pipe.

5. The static pressure box for a fire smoke exhaust fan according to claim 1, characterized in that: The end of the horizontal tube of the L-shaped tube away from the vertical tube is the air inlet end, and a spiral guide plate is fixedly installed in the horizontal tube of the L-shaped tube.

6. The static pressure box for a fire smoke exhaust fan according to claim 1, characterized in that: An anti-arc plate for preventing the transmission belt from coming off is fixedly mounted on the fixed pulley.

7. The static pressure box for a fire smoke exhaust fan according to claim 1, characterized in that: The regulating mechanism also includes a first gear, a fixed rack, a fixed shell, a first rotating shaft, a regulating volute spring, a second rotating shaft, a third fixed support, a fourth fixed support, a limiting rod, a third gear, a fifth fixed support, a fourth gear, and a gear ring, wherein the winding wheel is rotatably mounted on the regulating slide plate through the first rotating shaft, and the upper end of the first rotating shaft passes through the corresponding regulating slide plate and is fixedly mounted with the first gear; the fixed shell is fixedly mounted on the corresponding adjusting slide plate through the third fixed support and the fifth fixed support; the second rotating shaft is rotatably mounted on the third fixed support and the fifth fixed support and the second rotating shaft passes through the fixed shell, and the lower end of the second rotating shaft is fixedly mounted with the third gear, and the third gear is meshed with the first gear; a regulating volute spring is installed between the second rotating shaft and the fixed shell; a gear ring is rotatably mounted on the outer circumferential surface of the fixed shell, and a limiting rod is slidably mounted on the gear ring through threaded cooperation; the limiting rod cooperates with the outer layer of the regulating volute spring, and the position of the connection point between the outer layer of the regulating volute spring and the fixed shell can be controlled by the limiting rod; the lower end of the fixed shell is fixedly mounted with the fourth gear, and the fixed rack is fixedly mounted in the mounting shell, and the fixed rack is meshed with the fourth gear.

8. The static pressure box for a fire smoke exhaust fan according to claim 1, characterized in that: The second servo motor is fixedly mounted on the gear ring via a fourth fixed support, and the output shaft of the second servo motor is fixedly connected to the limiting rod.

9. The static pressure box for a fire smoke exhaust fan according to claim 1, characterized in that: The first servo motor is fixedly mounted on the fixed housing via a second fixed support, a second gear is fixedly mounted on the output shaft of the first servo motor, and the second gear is meshed with the gear ring.

10. The static pressure box for a fire smoke exhaust fan according to claim 1, characterized in that: The outer layer of the regulating spiral spring has teeth, and one end of the limiting rod that penetrates into the fixed shell cooperates with the teeth of the outer layer of the regulating spiral spring.

Images