Pressing rod device of fireproof check valve

Abstract

The utility model relates to a compression bar device of a fireproof check valve, which comprises a base, a main body is connected onto the base in a matching manner, double blades are arranged in the main body, a fixed support is connected to one side, corresponding to the double blades, in the base, the middle of the fixed support is rotatably coupled with a rotating compression piece through a connecting shaft, and a torsion spring is sleeved on the connecting shaft. The two ends of the torsion spring are connected with the fixing support and the rotating pressing piece respectively, the rotating pressing piece is connected with the fixing support through the fusing sleeve in a sleeved mode, when the temperature in the main body rises in case of fire, the fusing sleeve is fused, under the action of the torsion spring, the rotating pressing piece rotates immediately and is pressed on the double blades, the structure is simple and reasonable, the cost can be effectively reduced, and the practicability is high. And when the temperature rises to 150 DEG C in a fire, the blades can be directly and quickly pressed by rotating the pressing sheets, and the fire is prevented from flowing backwards in time, so that the fireproof quality is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke exhaust equipment, in particular to a pressing rod device of a fireproof check valve. Background Art

[0002] During the installation and use of existing range hoods, there are potential safety hazards. Nowadays, in many high-rise apartments, multiple households share the same flue. The exhaust pipes of range hoods are all connected to the same flue. When a fire breaks out in the flue, the fire is very likely to enter the room along the range hood pipe from the flue, causing a fire, which is extremely unsafe. For safety reasons, a fireproof check valve is installed at the outer end of the range hood pipe.

[0003] Existing fireproof check valves on the market generally include a main body, a base, a lining, and blades. The lining and blades are arranged inside the main body. One end of the main body is connected to a smoke pipe, and the base is fixedly connected to the flue opening. A sealing film is provided between the lining and the blades. A fixing bracket for fire prevention is provided at one end of the base corresponding to the blades. When the temperature inside the main body reaches a certain value, the fixing bracket needs to press the blades to prevent fire from entering the room through the blades from the flue and the main body. The existing fixing bracket includes a support plate. A chute that is inclined backward is opened on the support plate from top to bottom. A fixing bracket for pressing the left air door plate and the right air door plate passes through the chute. A pull spring for pulling the fixing bracket downward is connected to the fixing bracket. The two ends of the pull spring are respectively connected to the two ends of the fixing bracket. The middle part of the pull spring is sleeved outside the hole wall. A cross plate perpendicular to the support plate is fixed at the upper end of the support plate. A fusing pull hook for hooking the fixing bracket is hooked on the cross plate. By melting the fusing pull hook, the fixing bracket loses the restriction of the fusing pull hook and is pulled downward by the pull spring. After the fixing bracket is pulled down, the left air door plate and the right air door plate (blades) are squeezed and blocked on the oil and smoke exhaust holes, effectively preventing the backflow of fire. Although this structure can achieve the effect of preventing fire backflow, its structure is relatively complex, the cost is relatively high, and multiple linkages are required between components, so it affects the response time of the fixing bracket to press the blades, thus affecting the fire prevention quality. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pressing rod device of a fireproof check valve, which has a simple and reasonable structure, can effectively reduce the cost, and when a fire occurs, the rotating pressing piece can directly and quickly press the blades to prevent fire backflow in time, thereby effectively improving the fire prevention quality.

[0005] To solve the above technical problems, the present utility model is solved by the following technical solutions: A lever device for a fire prevention check valve, comprising a base, a main body is connected to the base in a mating manner, a double blade is provided in the main body, a fixed bracket is connected to one side of the double blade in the base, a rotating pressing piece is rotatably connected to the middle of the fixed bracket through a connecting shaft, a torsion spring is sleeved on the connecting shaft, two ends of the torsion spring are respectively connected to the fixed bracket and the rotating pressing piece, and one end between the fixed bracket and the rotating pressing piece is sleeved through a fusing sleeve.

[0006] Preferably, the fixed bracket includes a bracket body, bracket cross bars are formed at both ends of the bracket body, a connecting column is provided at one end of the bracket cross bar, and an upper connecting groove for connecting one end of the torsion spring is formed on the bracket cross bar.

[0007] Further preferably, pressing heads are provided at both ends of the rotating pressing piece, and a lower connecting groove for connecting the other end of the torsion spring is formed on the rotating pressing piece.

[0008] Further preferably, the pressing head is arranged in a Z shape, and a top convex is provided at the bottom end of the pressing head.

[0009] Further preferably, the connecting column is formed by cutting and bending the bracket cross bar.

[0010] The beneficial effects of the present utility model: It includes a base, a main body is connected to the base in a mating manner, a double blade is provided in the main body, a fixed bracket is connected to one side of the double blade in the base, a rotating pressing piece is rotatably connected to the middle of the fixed bracket through a connecting shaft, a torsion spring is sleeved on the connecting shaft, two ends of the torsion spring are respectively connected to the fixed bracket and the rotating pressing piece, and the rotating pressing piece and the fixed bracket are sleeved through a fusing sleeve. When the temperature in the main body rises after encountering fire, the fusing sleeve is melted, and under the action of the torsion spring, the rotating pressing piece immediately rotates and presses on the double blade. Its structure is simple and reasonable, and the cost can be effectively reduced. When the temperature rises to 150 degrees Celsius in case of fire, the rotating pressing piece can directly and quickly press the blade, preventing fire from flowing back in time, thereby effectively improving the fire prevention quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present utility model.

[0012] Figure 2 is an exploded structural diagram of the present utility model.

[0013] Figure 3 is a schematic structural diagram of the rotating pressing piece pressing the blade after fusing of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0015] As Figures 1-3 shown, a fixing bracket 2 device for a fireproof check valve includes a base, a main body is connected to the base in a mating manner, a double vane 1 is arranged in the main body, a fixing bracket 2 is connected to one side of the double vane 1 in the base, a rotating pressing piece 3 is rotatably connected to the middle of the fixing bracket 2 through a connecting shaft 4, a torsion spring 5 is sleeved on the connecting shaft 4, both ends of the torsion spring 5 are respectively connected to the fixing bracket 2 and the rotating pressing piece 3, the rotating pressing piece 3 and the fixing bracket 2 are sleeved through a fuse sleeve 6. When the temperature in the main body rises to 150 degrees Celsius after encountering fire, the fuse sleeve 6 is melted. Under the action of the torsion spring 5, the rotating pressing piece 3 immediately rotates and presses on the double vane 1. Its structure is simple and reasonable, the installation is convenient, the cost can be effectively reduced. When a fire occurs, the rotating pressing piece 3 can directly and quickly press the vane, preventing fire from flowing back in time, thereby effectively improving the fireproof quality.

[0016] In this embodiment, the fixing bracket 2 includes a bracket body 12, bracket cross bars 13 are formed at both ends of the bracket body 12, upper connection grooves 8 for facilitating the connection of one end of the torsion spring 5 are formed on the bracket cross bars 13, the connecting column 7 is formed by bending the cut part of the fixing bracket 2. Both ends of the rotating pressing piece 3 are provided with pressing heads 9, the fuse sleeve 6 sleeves one of the pressing heads 9 of the rotating pressing piece 3 and the connecting column 7, a lower connection groove 10 for facilitating the connection of the other end of the torsion spring 5 is formed on the rotating pressing piece 3, the pressing head 9 is arranged in a Z shape. In this way, the structures of the fixing bracket 2 and the rotating pressing piece 3 are simple, the connecting column 7, the upper connection groove 8, the pressing head 9 and the lower connection groove 10 can be processed conveniently, further saving costs. A top convex 11 is arranged at the bottom end of the pressing head 9, and the top convex 11 cooperates with the convex on the vane to press, increasing the pressure on the vane, so that the whole vane is completely pressed, preventing the vane from being washed open by fire. The arrangement of the connecting column 7 and the pressing head 9 also facilitates the simultaneous sleeving of the fuse sleeve 6.

[0017] According to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A pressure rod device for a fire check valve, comprising a base, a main body is connected to the base, and a double blade is arranged in the main body, characterized in that: A fixed bracket is connected to one side of the base corresponding to the double blades, and a rotating pressure plate is connected to the middle part of the fixed bracket through a connecting shaft rotating shaft, a torsion spring is sleeved on the connecting shaft, and two ends of the torsion spring are respectively connected to the fixed bracket and the rotating pressure plate, and one end between the fixed bracket and the rotating pressure plate is sleeved through a fuse sleeve.

2. A pressure rod device for a fire-proof check valve according to claim 1, characterized in that: The fixed bracket comprises a bracket body, both ends of the bracket body are formed with bracket cross bars, one end of the bracket cross bar is provided with a connecting column, and the bracket cross bar is provided with an upper connecting groove for connecting one end of a torsion spring.

3. A pressure rod device for a fire-proof check valve according to claim 2, characterized in that: Both ends of the rotating pressing plate are provided with pressing heads, and a lower connecting groove is provided on the rotating pressing plate for facilitating the connection of the other end of the torsion spring.

4. The pressure rod device of a fire-proof check valve according to claim 3 is characterized in that: The top pressure head is arranged in a Z shape, and a top protrusion is arranged at the bottom end of the top pressure head.

5. The pressure rod device of a fire-proof check valve according to claim 3, characterized in that: The connecting column is formed by cutting a notch on the bracket cross bar and then bending the plate.

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