Ventilation fireproof valve for air conditioner exhaust pipe

Abstract

The utility model relates to the field of fireproof valves, in particular to a ventilation fireproof valve for an air conditioner exhaust pipe, which comprises a valve frame, an automatic sealing mechanism is arranged in the valve frame, the automatic sealing mechanism comprises a plurality of groups of louver blades arranged in the valve frame, the section of each louver blade is V-shaped, and a transmission shaft is arranged on one side of each louver blade. The transmission shaft is rotationally connected to one side of the valve frame, the outer side wall of the transmission shaft is fixedly connected with a Z-shaped piece, the transmission shaft is located on the right side of the gravity center of the Z-shaped piece, and an auxiliary sealing frame is arranged on the right side of the Z-shaped piece and fixedly connected to the inner side wall of the valve frame. Through the cooperation of the valve frame and the automatic sealing mechanism, the angle between the valve frame and the Z-shaped piece is adjusted at the same time when a fire comes, and a sealing wall is formed through the cooperation of the Z-shaped piece and the auxiliary sealing frame, so that smoke dust is prevented from being accumulated on the surfaces of the louver blades, and the follow-up ventilation effect is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the field of fire dampers, in particular to a ventilation fire damper for an air conditioning exhaust pipe. Background Art

[0002] The smoke exhaust fire damper is a fire protection component, which is generally installed on the pipes of the mechanical smoke exhaust system. It is usually open and will be opened for smoke exhaust when a fire occurs. It will be closed when the smoke temperature in the smoke exhaust pipe reaches 280 degrees and meet the smoke leakage and fire resistance integrity requirements within a certain period of time, playing the role of smoke isolation and fire resistance. It is installed in the central air conditioning duct system. The working principle is to use the temperature control of the highly fusible alloy installed on the valve, and the action of gravity and spring mechanism. When a fire occurs, the flame invades the air duct, and the high temperature melts the fusible alloy on the valve, or causes the memory alloy to deform and automatically close the valve. It is used in occasions where the air duct and the fire partition pass through.

[0003] After searching, the patent document with publication number CN218582366U proposes a ventilation fire damper for air conditioning exhaust pipe: the utility model discloses a ventilation fire damper for air conditioning exhaust pipe, which relates to the field of fire dampers, including a valve frame and a valve plate, the valve plate is installed on the top of the outer surface of the valve frame, the surface of the valve plate is fixedly installed with a fuse rod, one end of the fuse rod is fixedly installed on the surface of the valve frame, and a fixing device is installed inside the valve frame. The ventilation fire damper for air conditioning exhaust pipe described in the utility model, by setting the fuse rod, valve frame and valve plate, the valve plate itself is vertical to the initial position of the valve frame, so the ventilation duct of the entire valve frame is fully opened, which can ensure sufficient ventilation space. When in use, the valve plate is initially opened. When the internal temperature reaches the temperature of the fuse rod itself, the fuse rod will melt. At this time, due to the effect of gravity, the valve plate will rotate around the hinge, and the ventilation area can be cut off at this time.

[0004] When this technical solution is used, since the fuse rod is a disposable item, it is difficult to use it again after being sealed once, and workers are required to repair the structure, thus reducing the practicality of the structure.

[0005] Therefore, it is necessary to invent a ventilation fire damper for an air conditioning exhaust duct to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a ventilation fire damper for an air conditioning exhaust pipe, which prevents smoke and dust from intrusion by cooperating with a valve frame and an automatic closing mechanism in a repeated working manner, so as to solve the problem in the prior art that the fuse rod is a disposable item and is difficult to use again after being closed once, and the structure needs to be repaired by workers, thereby reducing the practicability of the structure.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ventilation fire damper for an air-conditioning exhaust duct, comprising a valve frame, characterized in that an automatic sealing mechanism is arranged inside the valve frame, the automatic sealing mechanism comprises a plurality of groups of louvers arranged inside the valve frame, the cross-section of the louvers is V-shaped, a plurality of groups of transmission shafts are rotatably connected to one side of the valve frame, the outer side wall of the transmission shaft is fixedly connected to a Z-shaped piece and the transmission shaft is located on the right side of the center of gravity of the Z-shaped piece, an auxiliary sealing frame is arranged on the right side of the Z-shaped piece, and the auxiliary sealing frame is fixedly connected to the inner side wall of the valve frame, thereby achieving double sealing using the Z-shaped piece.

[0008] Preferably, a rotating shaft is fixedly connected inside the louver blades, and the rotating shaft is rotatably connected to the inner wall of the valve frame. A connecting rope is fixedly passed through the plurality of louver blades, and the louver blades are linked by the connecting rope.

[0009] Preferably, a servo motor is provided at one end of the topmost group of the rotating shafts, and the servo motor is fixedly connected to the outer side wall of the valve frame. A dust duct is fixedly connected to one side of the valve frame to facilitate the discharge of smoke and dust.

[0010] Preferably, a card slot is provided at the top of the auxiliary sealing frame, and a rubber pad is fixedly connected to the bottom wall of the card slot to increase the service life of the auxiliary sealing frame.

[0011] Preferably, an upper connecting plate is fixedly connected to the top wall of the valve frame, a lower connecting plate is provided on the side and lower part of the upper connecting plate, and the lower connecting plate is fixedly connected to the bottom wall of the valve frame to cooperate with the Z-shaped sheet to achieve complete sealing.

[0012] Preferably, the bottom end of the lowermost group of louvers is fixedly connected with a touch plate, the touch plate comprises a telescopic rod and a spring installed inside the telescopic rod, a seesaw is arranged below the touch plate, and the louvers are used to drive other parts to move in linkage.

[0013] Preferably, the cross-section of the seesaw is L-shaped, the bottom end of the seesaw is rotatably connected to a fixed plate, the fixed plate is fixedly connected to the bottom wall of the valve frame, and the movement of the seesaw is realized by the fixed plate.

[0014] Preferably, a plurality of the Z-shaped sheets are movably connected with linkage push rods, the linkage push rods are made of refractory ceramics, and the linkage between the Z-shaped sheets is achieved by using the linkage push rods.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] 1. Through the cooperation of the valve frame and the automatic sealing mechanism, the angles of the valve frame and the Z-shaped sheet are adjusted at the same time when a fire occurs, and the Z-shaped sheet and the auxiliary sealing frame are used to form a sealing wall, thereby preventing smoke and dust from accumulating on the surface of the louver blades and affecting the subsequent ventilation effect;

[0017] 2. Through the coordination of the seesaw, fixed plate, touch plate and other parts, the louver blades can drive the seesaw and Z-shaped pieces to adjust when adjusting their own angles, and the coordination of the linkage top rod can synchronize the adjustment to all Z-shaped pieces, thereby improving the integrity of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall first-view structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 4 For the utility model Figure 3 The enlarged structural diagram at A in the middle;

[0023] Figure 5 It is a schematic diagram of the enlarged structure of the auxiliary sealing frame of the utility model.

[0024] Description of reference numerals:

[0025] 1. Valve frame; 2. Automatic closing mechanism; 201. Shutter blade; 202. Transmission shaft; 203. Z-shaped piece; 204. Auxiliary sealing frame; 3. Dust duct; 4. Connecting rope; 5. Linkage push rod; 6. Lower connecting plate; 601. Upper connecting plate; 7. Servo motor; 8. Rotating shaft; 9. Rocker; 10. Fixed plate; 11. Touch plate; 12. Slot; 13. Rubber pad. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] The utility model provides Figure 1-5A ventilation fire damper for an air conditioning exhaust pipe shown in the figure comprises a valve frame 1, an automatic sealing mechanism 2 is arranged inside the valve frame 1, the automatic sealing mechanism 2 comprises a plurality of groups of shutter blades 201 arranged inside the valve frame 1, the cross section of the shutter blades 201 is V-shaped so that it can cooperate with subsequent parts to move, one side of the valve frame (1) is rotatably connected to a plurality of groups of transmission shafts (202), the outer wall of the transmission shaft 202 is fixedly connected to a Z-shaped piece 203 and the transmission shaft 202 is located on the right side of the center of gravity of the Z-shaped piece 203, so that the Z-shaped piece 203 is tilted to the left in a natural state, an auxiliary sealing frame 204 is arranged on the right side of the Z-shaped piece 203, so that the transmission shaft 202 is connected to the auxiliary sealing frame 204 in a working state, and a blocking wall is formed on the right side of the shutter blades 201 to block smoke and dust, thereby forming a double-layer seal with the shutter blades 201, and the auxiliary sealing frame 204 is fixedly connected to the inner wall of the valve frame 1. The interior of the blade 201 is fixedly connected with a rotating shaft 8, and the rotating shaft 8 is used to drive the rotation of the louver blade 201. The rotating shaft 8 is rotatably connected to the inner wall of the valve frame 1. A connecting rope 4 is fixedly passed through the plurality of louver blades 201, and all the louver blades 201 are synchronously rotated by the connecting rope 4. A servo motor 7 is provided at one end of the rotating shaft 8 of the topmost group, and the servo motor 7 is fixedly connected to the outer wall of the valve frame 1, so that the servo motor 7 provides power when the fire is sensed by the thermal sensor. A dust duct 3 is fixedly connected to one side of the valve frame 1, and the dust duct 3 is used to discharge smoke and dust into the flue. Through the cooperation of the valve frame 1 and the automatic sealing mechanism 2, the angle of the valve frame 1 and the Z-shaped piece 203 is adjusted at the same time when a fire occurs, and the cooperation of the Z-shaped piece 203 and the auxiliary sealing frame 204 is used to form a sealing wall, thereby preventing smoke and dust from accumulating on the surface of the louver blade 201 and affecting the subsequent ventilation effect.

[0028] Refer to the instruction manual Figure 1-5A card slot 12 is provided on the top of the auxiliary sealing frame 204, and a rubber pad 13 is fixedly connected to the bottom wall of the card slot 12. The card slot 12 is used to facilitate the card connection between the Z-shaped piece 203 and the auxiliary sealing frame 204, and the rubber pad 13 is used to buffer the impact force to improve the service life of the structure. The top wall of the valve frame 1 is fixedly connected to an upper connecting plate 601, and a lower connecting plate 6 is provided on the side and lower part of the upper connecting plate 601. The lower connecting plate 6 is fixedly connected to the bottom wall of the valve frame 1. The lower connecting plate 6 and the upper connecting plate 601 are used to fill the gap that the auxiliary sealing frame 204 cannot block on the upper and lower sides inside the valve frame 1. The bottom end of the lowest group of shutter blades 201 is fixedly connected to a touch plate 11, and the touch plate 11 includes a telescopic rod and a Spring, a seesaw 9 is arranged below the touch plate 11, the cross section of the seesaw 9 is L-shaped, the bottom end of the seesaw 9 is rotatably connected to a fixed plate 10, the fixed plate 10 is fixedly connected to the bottom wall of the valve frame 1, and a plurality of Z-shaped pieces 203 are movably connected with a linkage push rod 5, the material of the linkage push rod 5 is refractory ceramic to prevent the high temperature from causing the linkage push rod to deform, through the cooperation of the seesaw 9, the fixed plate 10, the touch plate 11 and other parts, when the louver 201 adjusts its own angle, the touch plate 11 slides to the left to the L-shaped bottom position of the seesaw 9, thereby driving the seesaw 9 to tilt up, and the left end of the Z-shaped piece 203 is lifted and the right end falls, and the cooperation of the linkage push rod is used to synchronize the adjustment to all Z-shaped pieces 203, thereby improving the integrity of the structure.

[0029] How this utility works:

[0030] Refer to the instruction manual Figure 1-5 When a fire occurs, the thermal sensor transmits the fire model to the servo motor 7 to start the servo motor 7, drive the rotating shaft 8 to rotate, and use the connecting rope 4 to drive all the louvers 201 to rotate synchronously for closing. When the louver 201 is closed, the touch plate 11 slides to the left to the bottom position of the L-shaped seesaw 9, thereby driving the seesaw 9 to tilt up, and the left end of the Z-shaped piece 203 is lifted and the right end falls, and the adjustment is synchronized to all Z-shaped pieces 203 by the cooperation of the linkage top rod, thereby improving the integrity of the structure to realize the closing action of the Z-shaped piece 203, and using the cooperation of the Z-shaped piece 203 and the auxiliary sealing frame 204 to form a sealing wall, thereby preventing smoke and dust from accumulating on the surface of the louver 201 and affecting the subsequent ventilation effect.

[0031] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A ventilation fire damper for an air conditioning exhaust pipe, comprising a valve frame (1), characterized in that: An automatic sealing mechanism (2) is arranged inside the valve frame (1), and the automatic sealing mechanism (2) comprises a plurality of groups of shutter blades (201) arranged inside the valve frame (1), and the cross section of the shutter blades (201) is V-shaped. One side of the valve frame (1) is rotatably connected to a plurality of groups of transmission shafts (202), and the outer wall of the transmission shaft (202) is fixedly connected to a Z-shaped piece (203) and the transmission shaft (202) is located on the right side of the center of gravity of the Z-shaped piece (203). An auxiliary sealing frame (204) is arranged on the right side of the Z-shaped piece (203), and the auxiliary sealing frame (204) is fixedly connected to the inner wall of the valve frame (1).

2. A ventilation fire damper for an air conditioning exhaust pipe according to claim 1, characterized in that: A rotating shaft (8) is fixedly connected inside the louver blades (201), and the rotating shaft (8) is rotatably connected to the inner wall of the valve frame (1). A connecting rope (4) is fixedly passed through the plurality of louver blades (201).

3. A ventilation fire damper for an air conditioning exhaust pipe according to claim 2, characterized in that: A servo motor (7) is provided at one end of the rotating shaft (8) of the topmost group. The servo motor (7) is fixedly connected to the outer wall of the valve frame (1). A dust duct (3) is fixedly connected to one side of the valve frame (1).

4. A ventilation fire damper for an air conditioning exhaust pipe according to claim 1, characterized in that: A card slot (12) is provided on the top of the auxiliary sealing frame (204), and a rubber pad (13) is fixedly connected to the bottom wall of the card slot (12).

5. The ventilation fire damper for an air conditioning exhaust pipe according to claim 1, characterized in that: An upper connecting plate (601) is fixedly connected to the top wall of the valve frame (1), a lower connecting plate (6) is provided on the side and below the upper connecting plate (601), and the lower connecting plate (6) is fixedly connected to the bottom wall of the valve frame (1).

6. A ventilation fire damper for an air conditioning exhaust pipe according to claim 1, characterized in that: The bottom end of the lowermost group of louvers (201) is fixedly connected to a touch plate (11), the touch plate (11) comprising a telescopic rod and a spring installed inside the telescopic rod, and a seesaw (9) is arranged below the touch plate (11).

7. A ventilation fire damper for an air conditioning exhaust pipe according to claim 6, characterized in that: The cross section of the seesaw (9) is L-shaped, and the bottom end of the seesaw (9) is rotatably connected to a fixed plate (10), and the fixed plate (10) is fixedly connected to the bottom wall of the valve frame (1).

8. The ventilation fire damper for an air conditioning exhaust pipe according to claim 1, characterized in that: A plurality of the Z-shaped sheets (203) are movably connected with linkage push rods (5), and the linkage push rods (5) are made of refractory ceramics.

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