Fireproof valve with high air tightness

Abstract

The utility model discloses a fireproof valve with high air tightness. The fireproof valve comprises a first shell, a driving assembly and at least two fireproof blades. The driving assembly comprises a second shell and a locking piece, a transmission structure is arranged in the second shell and comprises a driving rack and a reset spring, the reset spring is connected with the transmission rack, and the locking piece is detachably connected with the driving rack; each fireproof blade is provided with a driven gear, the driven gears are meshed with the driving racks, and a connecting notch is formed between every two adjacent fireproof blades. When the fireproof blade is in a horizontal state, the locking piece is detachably connected with the driving rack; and when the fireproof blades are in a vertical state, the locking pieces are separated from the driving racks, and the connecting notches of the adjacent fireproof blades are mutually embedded. According to the technical scheme, smoke can be prevented from escaping through gaps between every two of the first blade, the second blade and the third blade, and deformation of the first blade, the second blade and the third blade can be prevented.

Description

Technical Field

[0001] The utility model relates to the field of fire dampers, in particular to a fire damper with high air tightness. Background Art

[0002] In densely populated buildings, a ventilation system needs to be set up to achieve ventilation, heat conduction and cooling, and humidity maintenance. The ventilation system specifically includes air ducts and fire dampers. The air ducts are used to connect the rooms in the building. The fire dampers can be divided into specific specifications such as 70℃ fire dampers and 280℃ fire dampers. Among them, 70℃ fire dampers are generally set at the firewall, and 280℃ fire dampers are generally used in conjunction with smoke exhaust fans. When a fire occurs, the 70℃ fire damper will melt and close when the smoke exceeds 70℃ to prevent the fire from expanding and spreading. The 280℃ fire damper will melt and close when the smoke exceeds 280℃, thereby exhausting smoke to ensure the evacuation and rescue safety of people in the building.

[0003] The existing fire damper specifically includes a fuse, a drive assembly and a plurality of blades. The fuse locks the drive assembly in a state to be triggered. When a fire does not occur, the fire damper is in an open state, the fuse is intact, and the blades are in a horizontal state, and the air passes through the fire damper through the channel between the blades. When a fire occurs, the fuse will melt due to heat, and the drive assembly will be triggered, thereby driving the blades to change to a vertical state and close the fire damper. However, when the fire damper is closed, smoke can escape from the gaps between adjacent blades, and the blades will also be deformed due to the impact of smoke, so there are certain safety hazards.

[0004] To this end, we propose a fire damper that can reduce smoke escape and resist smoke impact. Utility Model Content

[0005] The main purpose of the utility model is to provide a fire damper with high air tightness, aiming to solve the technical problems of the existing fire damper that smoke is easy to escape and the blades are deformed due to the impact of smoke.

[0006] To achieve the above-mentioned purpose, the utility model provides a fire damper with high airtightness, comprising a first shell, a drive assembly and at least two fire blades, wherein the drive assembly is arranged outside the first shell, and the fire blades are arranged inside the first shell;

[0007] The driving assembly includes a second housing and a locking member, wherein a transmission structure is disposed in the second housing, wherein the transmission structure includes a driving rack and a return spring, wherein one end of the return spring is connected to one end of the driving rack, and the locking member is disposed in the housing, and the locking member is detachably connected to the driving rack;

[0008] The fireproof blades each have a blade mounting shaft and a driven gear, the blade mounting shaft is rotatably connected to the first housing, the driven gear is arranged at the end of the blade mounting shaft facing the drive assembly, the driven gear is meshed with the drive rack, and connecting notches are arranged between adjacent fireproof blades;

[0009] When the fireproof blade is in a horizontal state, the reset spring is in a stretched state, the locking member is detachably connected to the driving rack, and the front end of the first housing is connected to the rear end thereof;

[0010] When the fireproof blade is in a vertical state, the reset spring is in a normal state, the locking member is disengaged from the driving rack, the connecting notches of adjacent fireproof blades are engaged with each other, and the front end of the first shell is separated from the rear end thereof;

[0011] A first limit block and a second limit block are provided in the first shell. When the fireproof blades are in a vertical state, the rear side of the first upper fireproof blade abuts against the first limit block, and the rear side of the first lower fireproof blade abuts against the second limit block.

[0012] Optionally, the fireproof blade is specifically a first blade, a second blade and a third blade arranged in sequence from top to bottom, the lower end of the first blade is provided with a first notch, the upper end of the second blade is provided with a second notch, the lower end of the second blade is provided with a third notch, the upper end of the third blade is provided with a fourth notch, and the first notch, the second notch, the third notch and the fourth notch are all connecting notches;

[0013] When the first blade, the second blade and the third blade are all in a vertical state, the first notch is engaged with the second notch, the third notch is engaged with the fourth notch, the rear side of the upper end of the first blade is against the first limit block, and the rear side of the lower end of the third blade is against the second limit block.

[0014] Optionally, the driving rack is specifically a first rack and a second rack, the return spring is specifically a first spring and a second spring, the number of the locking members is specifically two, the first blade has a first gear, the second blade has a second gear, the third blade has a third gear, and the first gear, the second gear and the third gear are all driven gears;

[0015] The first gear and the second gear are respectively meshed with the first rack, one end of the first spring is connected to one end of the first rack, the third gear is meshed with the second rack, one end of the second spring is connected to one end of the second rack, and the two locking members are respectively detachably connected to the first rack and the second rack.

[0016] Optionally, the two locking members are respectively a fuse and a rotation limit block, the fuse is arranged in the first housing, and the rotation limit block is rotatably arranged on the side wall of the first housing;

[0017] The first rack has a first limiting rod, one end of the first limiting rod away from the first rack extends into the first housing, and the second rack has a second limiting rod;

[0018] The fuse is detachably connected to the first limiting rod, one end of the rotation limiting block is located in the shell, and the other end is detachably connected to the second limiting rod.

[0019] Optionally, the second shell is divided into an upper cavity and a lower cavity, the first gear, the second gear, the first rack and the first spring are all arranged in the upper cavity, and the third gear, the second rack and the second spring are all arranged in the lower cavity.

[0020] Optionally, flange rings are provided at the front and rear ends of the first shell, and a mounting groove is provided on the inner circumference of the flange ring, and a first sealing ring can be installed in the mounting groove.

[0021] Optionally, a detachably connected sealing cover is provided on the second shell, and a second sealing ring is provided between the second shell and the sealing cover.

[0022] The technical solution of the utility model has the following beneficial effects:

[0023] 1. By setting the first notch, the second notch, the third notch and the fourth notch, the first blade, the second blade and the third blade can be closely connected, thereby effectively preventing smoke from escaping through the gaps between the first blade, the second blade and the third blade, and also facilitating the first blade, the second blade and the third blade to form a tighter whole, and jointly share the impact force of the smoke, thereby preventing the three from being deformed.

[0024] 2. By setting the first limit block and the second limit block, the rear side of the upper end of the first blade is abutted against the first limit block, and the rear side of the lower end of the third blade is abutted against the second limit block, which can further prevent smoke from escaping from between the first blade and the first shell, and between the third blade and the first shell. In addition, the first limit block and the second limit block can respectively support the first blade and the third blade, thereby further preventing the first blade, the second blade and the third blade from deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 The overall structure of a fire damper with high air tightness in an open state according to an embodiment of the utility model is shown in FIG. Figure 1 ;

[0027] Figure 2 The overall structure of a fire damper with high air tightness in an open state according to an embodiment of the utility model is shown in FIG. Figure 2 ;

[0028] Figure 3 The overall structure of a fire damper with high air tightness in an open state according to an embodiment of the utility model is shown in FIG. Figure 3 ;

[0029] Figure 4 This is a schematic diagram of the overall structure of a fire damper with high air tightness when it is closing according to one embodiment of the utility model;

[0030] Figure 5 This is a schematic diagram of the overall structure of a fire damper with high air tightness in a closed state according to an embodiment of the utility model.

[0031] Explanation of the accompanying figures: first shell 100, flange ring 110, mounting groove 1101, fuse 120, rotation limit block 130, first limit block 140, first through hole 150, second limit block 160, first blade 200, first gear 210, first notch 220, second blade 300, second gear 310, second notch 320, third notch 330, third blade 400, third gear 410, fourth notch 420, drive assembly 500, upper cavity 510, lower cavity 520, first rack 530, first spring 540, second rack 550, second spring 560.

[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] The utility model provides a fire damper with high air tightness.

[0037] like Figures 1 to 5 As shown, in one embodiment of the utility model, the fire damper with high air tightness includes a first shell 100, a drive assembly 500 and three fireproof blades. In this embodiment, the first shell 100 is a hollow cylindrical cube, and the front end of the first shell 100 is an air inlet end, and the rear end is an air outlet end. Flange rings 110 are provided at the front and rear ends of the first shell 100, and a mounting groove 1101 is provided on the inner circumference of the flange ring 110. The first sealing ring can be installed in the mounting groove 1101; when the front and rear ends of the first shell 100 are respectively connected to the air duct, the first sealing ring is located between the first shell 100 and the air duct, so that the gas can be prevented from escaping from the connection between the two, thereby improving the air tightness of the fire damper. In addition, the above-mentioned drive assembly 500 is arranged on the outside of the first shell 100, and the three fireproof blades are all arranged in the first shell 100.

[0038] like Figure 2As shown, in this embodiment, the driving assembly 500 specifically includes a second housing and a locking member, a transmission structure is provided in the second housing, the transmission structure includes a driving rack and a reset spring, one end of the reset spring is connected to one end of the driving rack, the locking member is arranged in the housing, and the locking member is detachably connected to the driving rack. Specifically, the second housing is divided into an upper cavity 510 and a lower cavity 520, the driving rack is specifically a first rack 530 and a second rack 550, the reset spring is specifically a first spring 540 and a second spring 560, and the number of the locking members is specifically two, specifically a fuse 120 and a rotation limit block 130; wherein, the first rack 530 and the first spring 540 are both arranged in the upper cavity 510, and the upper end of the first spring 540 is connected to the top wall of the upper cavity 510, and the second rack 550 and the second spring 560 are both arranged in the lower cavity 520, and the lower end of the second spring 560 is connected to the bottom wall of the lower cavity 520.

[0039] Furthermore, in the upper cavity 510, a first through hole 150, a second through hole and a third through hole are provided from top to bottom, the first through hole 150 and the second through hole are used to connect the upper cavity 510 with the first shell 100, and the third through hole is used to connect the upper cavity 510 with the lower cavity 520; secondly, the above-mentioned first rack 530 has a first limit rod, and the first limit rod is away from one end of the first rack 530 and extends into the first shell 100 through the first through hole 150, so as to be detachably connected with the fuse 120 in the first shell 100; thirdly, the second rack 550 has a second limit rod, the second limit rod is located at the upper end of the second rack 550, and the upper end of the second limit rod extends into the upper cavity 510 through the third through hole, and at the same time, the rotation limit block 130 is rotatably arranged in the second through hole, and one end of the rotation limit block 130 extends into the interior of the first shell 100, and the other end is clamped with the second limit rod. It is worth noting that the lower end of the above-mentioned fuse 120 is connected to the end of the first limit rod away from the first rack 530. When the fuse 120 is heated and melted, the first spring 540 can drive the first rack 530 to move downward; in addition, when the rotation limit block 130 is rotated, it can be disengaged from the second limit rod, so that the second spring 560 can drive the second rack 550 to move upward.

[0040] like Figure 1 and 3As shown, in this embodiment, the fireproof blades all have a blade mounting shaft and a driven gear, the blade mounting shaft is rotatably connected to the first housing 100, the driven gear is arranged at the end of the blade mounting shaft facing the driving assembly 500, the driven gear is meshed with the driving rack, and connecting gaps are arranged between adjacent fireproof blades. In this embodiment, the fireproof blades are specifically the first blade 200, the second blade 300 and the third blade 400 arranged in sequence from top to bottom, the lower end of the first blade 200 is provided with a first gap 220, the upper end of the second blade 300 is provided with a second gap 320, the lower end of the second blade 300 is provided with a third gap 330, and the upper end of the third blade 400 is provided with a fourth gap 420, and the first gap 220, the second gap 320, the third gap 330 and the fourth gap 420 are all connecting gaps.

[0041] Specifically, the first blade 200 has a first gear 210, the second blade 300 has a second gear 310, and the third blade 400 has a third gear 410. The first gear 210, the second gear 310, and the third gear 410 are all driven gears. In addition, the first gear 210 and the second gear 310 are also disposed in the upper cavity 510, and the third gear 410 is disposed in the lower cavity 520; in addition, the first gear 210 and the second gear 310 are respectively meshed with the first rack 530, and the third gear 410 is meshed with the second rack 550.

[0042] In this embodiment, a first stopper 140 and a second stopper 160 are further provided in the first shell 100. When the first blade 200, the second blade 300 and the third blade 400 are all in a vertical state, the rear side of the upper end of the first blade 200 abuts against the first stopper 140, and the rear side of the lower end of the third blade 400 abuts against the second stopper 160. In addition, a detachably connected sealing cover is provided on the second shell, and a second sealing ring is provided between the second shell and the sealing cover. The sealing cover is provided so that the staff can remove the sealing cover to install and maintain the components inside the second shell. The second sealing ring is provided to prevent smoke from escaping from the connection between the second shell and the sealing cover.

[0043] It is worth mentioning that:

[0044] When the fuse 120 is in good condition, the first blade 200, the second blade 300 and the third blade 400 are all in a horizontal state, the first spring 540 and the second spring 560 are both in a stretched state, one end of the rotation limit block 130 is engaged with the second limit rod, and at this time, the front end of the first housing 100 is connected to the rear end thereof;

[0045] When the fuse 120 is melted by heat, the first spring 540 can drive the first rack 530 to move downward, and the downward moving first rack 530 will drive the first gear 210 and the second gear 310 to rotate, and the first gear 210 will drive the mounting shaft and the first blade 200 to rotate until the first blade 200 changes from a horizontal state to a vertical state. Similarly, the second gear 310 will drive the second blade 300 to change to a vertical state. When the first blade 200 and the second blade 300 change to a vertical state, the first notch 220 will be engaged with the second notch 320, and the rear side of the upper end of the first blade 200 will abut against the first limit block 140. Moreover, during the rotation of the second blade 300, it will collide with one end of the rotation limit block 130 located in the first shell 100. The second blade 300 will force the rotation limit block 130 to rotate, so that the rotation limit block 130 is disengaged from the second limit rod. At this time, the second spring 560 can drive the second rack 550 to move upward, so that the second rack 550 drives the third gear 410 to rotate, and the third gear 410 will drive the third blade 400 to change to a vertical state. When the third blade 400 is in a vertical state, the third notch 330 will be engaged with the fourth notch 420, and the rear side of the lower end of the third blade 400 will be against the second limit block 160; at this time, the front end of the first shell 100 is separated from its rear end.

[0046] In addition, in this embodiment, the first blade 200 and the second blade 300 are specifically rotated in the clockwise direction from the horizontal state to the vertical state, and the third blade 400 is specifically rotated in the counterclockwise direction from the horizontal state to the vertical state, and the first blade 200 and the second blade 300 are changed to the vertical state before the third blade 400. This form of movement can make the first blade 200, the second blade 300 and the third blade 400 avoid each other during movement, and make the first blade 200 and the third blade 400 avoid the first limit block 140 and the second limit block 160 respectively, so as to achieve the following effects: the first notch 220 is engaged with the second notch 320, and the rear side of the upper end of the first blade 200 is against the first limit block 140, the third notch 330 is engaged with the fourth notch 420, and the rear side of the lower end of the third blade 400 is against the second limit block 160.

[0047] Specifically, the working principle and process of the utility model are:

[0048] 1. By providing the first notch 220, the second notch 320, the third notch 330 and the fourth notch 420, the first blade 200, the second blade 300 and the third blade 400 can be closely connected, thereby effectively preventing smoke from escaping through the gaps between the first blade 200, the second blade 300 and the third blade 400, and also facilitating the first blade 200, the second blade 300 and the third blade 400 to form a tighter whole, and jointly share the impact force of the smoke, thereby preventing the three from being deformed.

[0049] 2. By setting the first limit block 140 and the second limit block 160, the rear side of the upper end of the first blade 200 is abutted against the first limit block 140, and the rear side of the lower end of the third blade 400 is abutted against the second limit block 160, which can further prevent smoke from escaping from between the first blade 200 and the first shell 100, and between the third blade 400 and the first shell 100. In addition, the first limit block 140 and the second limit block 160 can respectively support the first blade 200 and the third blade 400, thereby further preventing the first blade 200, the second blade 300 and the third blade 400 from deformation.

[0050] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A fire damper with high air tightness, characterized in that: It comprises a first shell, a driving assembly and at least two fireproof blades, wherein the driving assembly is arranged outside the first shell, and the fireproof blades are arranged inside the first shell; The driving assembly includes a second housing and a locking member, wherein a transmission structure is disposed in the second housing, wherein the transmission structure includes a driving rack and a return spring, wherein one end of the return spring is connected to one end of the driving rack, and the locking member is disposed in the housing, and the locking member is detachably connected to the driving rack; The fireproof blades each have a blade mounting shaft and a driven gear, the blade mounting shaft is rotatably connected to the first housing, the driven gear is arranged at the end of the blade mounting shaft facing the drive assembly, the driven gear is meshed with the drive rack, and connecting notches are arranged between adjacent fireproof blades; When the fireproof blade is in a horizontal state, the reset spring is in a stretched state, the locking member is detachably connected to the driving rack, and the front end of the first housing is connected to the rear end thereof; When the fireproof blade is in a vertical state, the reset spring is in a normal state, the locking member is disengaged from the driving rack, the connecting notches of adjacent fireproof blades are engaged with each other, and the front end of the first shell is separated from the rear end thereof; A first limit block and a second limit block are provided in the first shell. When the fireproof blades are in a vertical state, the rear side of the first upper fireproof blade abuts against the first limit block, and the rear side of the first lower fireproof blade abuts against the second limit block.

2. The fire damper with high airtightness according to claim 1, characterized in that: The fireproof blades are specifically a first blade, a second blade and a third blade arranged in sequence from top to bottom, a first notch is provided at the lower end of the first blade, a second notch is provided at the upper end of the second blade, a third notch is provided at the lower end of the second blade, and a fourth notch is provided at the upper end of the third blade, and the first notch, the second notch, the third notch and the fourth notch are all connecting notches; When the first blade, the second blade and the third blade are all in a vertical state, the first notch is engaged with the second notch, the third notch is engaged with the fourth notch, the rear side of the upper end of the first blade is against the first limit block, and the rear side of the lower end of the third blade is against the second limit block.

3. The fire damper with high airtightness according to claim 2, characterized in that: The driving rack is specifically a first rack and a second rack, the return spring is specifically a first spring and a second spring, the number of the locking members is specifically two, the first blade has a first gear, the second blade has a second gear, the third blade has a third gear, and the first gear, the second gear and the third gear are all driven gears; The first gear and the second gear are respectively meshed with the first rack, one end of the first spring is connected to one end of the first rack, the third gear is meshed with the second rack, one end of the second spring is connected to one end of the second rack, and the two locking members are respectively detachably connected to the first rack and the second rack.

4. The fire damper with high airtightness according to claim 3, characterized in that: The two locking members are respectively a fuse and a rotation limit block, the fuse is arranged in the first housing, and the rotation limit block is rotatably arranged on the side wall of the first housing; The first rack has a first limiting rod, one end of the first limiting rod away from the first rack extends into the first housing, and the second rack has a second limiting rod; The fuse is detachably connected to the first limiting rod, one end of the rotation limiting block is located in the shell, and the other end is detachably connected to the second limiting rod.

5. The fire damper with high airtightness according to claim 3, characterized in that: The second shell is divided into an upper cavity and a lower cavity. The first gear, the second gear, the first rack and the first spring are all arranged in the upper cavity, and the third gear, the second rack and the second spring are all arranged in the lower cavity.

6. The fire damper with high airtightness according to claim 1, characterized in that: The front end and the rear end of the first shell are both provided with flange rings, and the inner circumference of the flange ring is provided with a mounting groove, and the first sealing ring can be installed in the mounting groove.

7. The fire damper with high airtightness according to claim 1, characterized in that: The second shell is provided with a detachably connected sealing cover, and a second sealing ring is provided between the second shell and the sealing cover.

Images