A new type of smoke exhaust fire prevention check valve

Abstract

The utility model relates to the technical field of check valves, and in particular to a novel oil fume exhaust fire prevention check valve, comprising a housing, a pipe is arranged on the housing, and a valve plate is rotatably hinged at one end of the corresponding pipe through a hinged mounting structure; the hinged mounting structure comprises a mounting plate arranged at intervals on the outside of one end of the pipe, the edge of the mounting plate is bent inward to form a cylindrical connecting cylinder and connected to the housing; a mounting shaft is arranged on the outside of the mounting plate, and the valve plate comprises valve plate units arranged in pairs on both sides of the mounting shaft, the inner sides of the valve plate units are rotatably hinged on the mounting shaft through a hinged structure, and the mounting plates are respectively provided with a clearance port corresponding to the valve plate units, and a torsion spring mechanism is arranged on the mounting shaft. The utility model has the advantages of simpler and more reasonable structural design, can make the valve plate work more reliably, and can better form a seal.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a novel oil fume exhaust fireproof check valve. Background Art

[0002] The new type of oil fume fire-proof check valve is a valve installed on the oil fume exhaust pipe of the kitchen range hood. It relies on the heat flow through the range hood to automatically open and close the valve plate to prevent the backflow of oil fume. It is an automatic valve, and its main function is to prevent the backflow of oil fume. It only allows flow in one direction and prevents the airflow from flowing in the opposite direction. When the range hood starts working, the airflow with oil fume passes through the air inlet and the guide surface, pushes open the one-way valve plate, and discharges the oil fume into the public flue; when the range hood stops working, the one-way valve plate automatically closes under the action of gravity, isolating the oil fume channel from the public flue, and the oil fume in the public flue will not flow back in.

[0003] The inventor has designed a smoke exhaust fire prevention check valve, which is characterized in that when there is high temperature, thick smoke or open flame in the public smoke pipe, the connection end of the fusible copper sheet inside the smoke exhaust fire prevention check valve melts and falls off, and the restriction on the limit rod is released. The torsion spring mechanism drives the limit rod to rotate and abut against the outside of the valve plate to limit the opening of the valve plate, and can be pressed against the valve plate, so that thick smoke and open flame cannot directly enter the room through the valve plate. However, the above patent structure still has the following disadvantages: in the natural state, the valve plate relies on its own gravity to keep it in a closed state. Such a structural design has the disadvantage of insufficient reliability in the actual working process, and the valve plate and the pipe end face are not tightly matched. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to design a new type of oil fume exhaust fire prevention check valve which has a simpler and more reasonable structural design, can make the valve plate work more reliably, and can better fit closely with the pipeline.

[0005] To achieve the above-mentioned purpose, the utility model provides a novel oil fume exhaust fire-proof check valve, comprising an outer shell, a pipe is arranged on the outer shell, and a valve plate is rotatably hinged at one end of the corresponding pipe through a hinged mounting structure; it is characterized in that; the hinged mounting structure comprises a mounting plate arranged at intervals on the outside of one end of the pipe, the edge of the mounting plate is bent inward to form a cylindrical connecting cylinder and connected to the outer shell; a mounting shaft is arranged on the outside of the mounting plate, the valve plate comprises valve plate units arranged in pairs on both sides of the mounting shaft, the inner sides of the valve plate units are rotatably hinged on the mounting shaft through a hinged structure, and the mounting plates are respectively provided with yield openings corresponding to the valve plate units, a torsion spring mechanism is arranged on the mounting shaft, and two torsion force application ends of the torsion spring mechanism are respectively connected to the valve plate unit and enable the valve plate units to respectively stick to and seal at the edge position of the yield opening on the mounting plate.

[0006] In this way, a mounting plate is arranged on the outer side of one end of the pipeline in the shell, and a connecting tube is formed on the mounting plate and connected and fixed to the shell; and a mounting shaft is arranged on the mounting plate, and the valve plate is arranged as two valve plate units which are independent of each other and arranged in pairs, the two valve plate units are arranged on both sides of the mounting shaft and are respectively hingedly mounted on the mounting shaft, a clearance opening is arranged on the mounting plate, and a torsion spring mechanism is installed on the mounting shaft, so that the two torsion force application ends of the torsion spring mechanism are respectively connected to the valve plate unit, and the valve plate units can be respectively attached and sealed to the edge position of the clearance opening on the mounting plate; the two valve plate units are independent of each other and will not interfere with each other during operation; such a structural design makes the valve plate work more reliably and can better fit closely to the pipeline.

[0007] As an optimization, the mounting plate is designed to be a circular plate structure; and the upper end of the mounting plate is inclined toward the pipeline.

[0008] In this way, the shape design of the mounting plate is more reasonable; and the mounting plate is arranged in an inclined manner, which can improve the reliability of the valve plate.

[0009] As an optimization, the inner end of the connecting tube is bent vertically outward to form a fixing plate of a rectangular structure design and is connected and fixed inside the shell.

[0010] In this way, by bending the inner end of the connecting tube to form a fixing plate, installation and fixing can be more convenient.

[0011] As an optimization, the valve plate unit includes a skeleton plate with a semicircular structure design, a hinge block is connected to the inner side of the skeleton plate, both ends of the hinge block are respectively provided with a hinge protrusion, and the installation shaft is inserted into and installed in the hinge hole of the hinge protrusion; and a circle of sealing ring is sleeved on the edge of the skeleton plate.

[0012] In this way, the structural design of the valve plate unit is more reasonable, can be more convenient to install, and can also form a better seal.

[0013] As an optimization, the torsion spring mechanism includes a torsion spring sleeved on the mounting shaft, and the two torsion bars of the torsion spring each form the torsion force application end; and the torsion bars each abut against and support the hinge block.

[0014] In this way, the torsion spring mechanism is simpler in design and more convenient to install.

[0015] As an optimization, the inner surface of the skeleton plate is partially extruded outward to form an extrusion pit, and an extrusion protrusion is formed at a position on the outer surface of the skeleton plate corresponding to the extrusion pit.

[0016] In this way, on the one hand, the structural strength of the frame plate can be improved; on the other hand, the structural design is simpler and more reasonable.

[0017] As an optimization, the mounting shaft is arranged vertically as a whole; and a mounting bracket is provided on the mounting plate and at each of the vertical ends of the corresponding mounting shaft, the mounting bracket includes a bracket fixing block connected and fixed to the mounting plate, and the bracket fixing block is integrally formed with a bracket support block arranged outward, and the two ends of the mounting shaft are respectively inserted into the fixing holes connected to the bracket support block.

[0018] In this way, the arrangement of the installation shaft is more reasonable and the installation of the installation shaft is more convenient; and the valve plate units are arranged in pairs on the left and right, and the structural design is more reasonable.

[0019] As an optimization, the outer ends of the bracket support blocks are bent to form bracket limit blocks; and after the two valve plate units are rotated away from the mounting plate, the two sides of the bracket limit blocks can each abut and support on the surface of the valve plate unit to limit the valve plate unit from continuing to rotate.

[0020] In this way, by bending the outer end of the frame support block to form a support limit block, the maximum rotation angle of the valve plate unit can be better limited, and the structural design is more reasonable.

[0021] As an optimization, a position on the clearance port corresponding to the far side of the valve plate unit has an extended protrusion protruding inwardly.

[0022] In this way, by designing the extended protrusion, the valve plate unit can be better supported.

[0023] In summary, in the above-mentioned novel oil fume exhaust fire check valve structure, by designing the valve plate into two independently designed ones and then providing a torsion spring mechanism, the two valve plate units can be respectively attached to and sealed with the mounting plate, making the valve plate work more reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a novel oil fume exhaust fire prevention check valve in a specific implementation manner of the utility model.

[0025] Figure 2 Yes Figure 1 Schematic diagram of the structure after one of the valve plate units is omitted.

[0026] Figure 3 yes Figure 1 Schematic diagram of the structure after rotation by an angle.

[0027] Figure 4 Yes Figure 3 Schematic diagram of the structure after one of the valve plate units is omitted.

[0028] Figure 5 yes Figure 1Schematic diagram of the structure after rotation to another angle.

[0029] Figure 6 Yes Figure 1 Schematic diagram of the structure after the shell is omitted.

[0030] Figure 7 yes Figure 6 A locally enlarged schematic diagram of position A in FIG.

[0031] Figure 8 yes Figure 6 Schematic diagram of the structure after rotation by an angle. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific manner, and therefore cannot be understood as a limitation on the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] like Figures 1 to 8 A novel oil fume exhaust fire check valve is shown, comprising a shell 1, a pipe 2 is arranged on the shell, and a valve plate 3 is rotatably hinged to one end of the corresponding pipe through a hinged mounting structure; the hinged mounting structure comprises a mounting plate 4 arranged at intervals on the outside of one end of the pipe, and the edge of the mounting plate is bent inward to form a cylindrical connecting cylinder 5 and connected to the shell; a mounting shaft 6 is arranged on the outside of the mounting plate, and the valve plate comprises valve plate units 7 arranged in pairs on both sides of the mounting shaft, the inner sides of the valve plate units are rotatably hinged to the mounting shaft through a hinged structure, and the mounting plates are respectively provided with a yielding opening 8 corresponding to the valve plate units, and a torsion spring mechanism is provided on the mounting shaft, and the two torsion force application ends of the torsion spring mechanism are respectively connected to the valve plate unit so that the valve plate units can each be attached and sealed to the edge position of the yielding opening on the mounting plate.

[0034] In this way, a mounting plate is arranged on the outer side of one end of the pipeline in the shell, and a connecting tube is formed on the mounting plate and connected and fixed to the shell; and a mounting shaft is arranged on the mounting plate, and the valve plate is arranged as two valve plate units which are independent of each other and arranged in pairs, the two valve plate units are arranged on both sides of the mounting shaft and are respectively hingedly mounted on the mounting shaft, a clearance opening is arranged on the mounting plate, and a torsion spring mechanism is installed on the mounting shaft, so that the two torsion force application ends of the torsion spring mechanism are respectively connected to the valve plate unit, and the valve plate units can be respectively attached and sealed to the edge position of the clearance opening on the mounting plate; the two valve plate units are independent of each other and will not interfere with each other during operation; such a structural design makes the valve plate work more reliably and can better fit closely to the pipeline.

[0035] In this specific implementation manner, the mounting plate is designed to be a circular plate-shaped structure; and the upper end of the mounting plate is tilted toward the pipeline.

[0036] In this way, the shape design of the mounting plate is more reasonable; and the mounting plate is arranged in an inclined manner, which can improve the reliability of the valve plate.

[0037] In this specific embodiment, the inner end of the connecting tube is bent vertically outward to form a fixing plate 9 with a rectangular structure design and is connected and fixed inside the shell.

[0038] In this way, by bending the inner end of the connecting tube to form a fixing plate, installation and fixing can be more convenient.

[0039] In this specific embodiment, the valve plate unit includes a skeleton plate 10 with a semicircular structure design, and a hinge block 11 is connected to the inner side of the skeleton plate. Both ends of the hinge block are respectively provided with a hinge protrusion 12, and the installation shaft is inserted into and installed in the hinge hole of the hinge protrusion; and a circle of sealing ring 13 is sleeved on the edge of the skeleton plate.

[0040] In this way, the structural design of the valve plate unit is more reasonable, can be more convenient to install, and can also form a better seal.

[0041] In this specific embodiment, the torsion spring mechanism includes a torsion spring 14 sleeved on the mounting shaft, and the two torsion bars of the torsion spring each form the torsion force application end; and the torsion bars each abut against and support the hinge block.

[0042] In this way, the torsion spring mechanism is simpler in design and more convenient to install.

[0043] In this specific embodiment, the inner surface of the frame plate is partially extruded outward to form an extrusion pit, and an extrusion protrusion 15 is formed at a position on the outer surface of the frame plate corresponding to the extrusion pit.

[0044] In this way, on the one hand, the structural strength of the frame plate can be improved; on the other hand, the structural design is simpler and more reasonable.

[0045] In this specific embodiment, the mounting shaft is arranged vertically as a whole; and mounting brackets are respectively provided on the mounting plate and at the vertical ends of the corresponding mounting shaft, and the mounting brackets include a bracket fixing block 16 connected and fixed to the mounting plate, and a bracket support block 17 arranged outward is integrally formed on the bracket fixing block, and the two ends of the mounting shaft are respectively inserted into the fixing holes connected to the bracket support block.

[0046] In this way, the arrangement of the installation shaft is more reasonable and the installation of the installation shaft is more convenient; and the valve plate units are arranged in pairs on the left and right, and the structural design is more reasonable.

[0047] In this specific embodiment, the outer ends of the bracket support blocks are bent to form bracket limit blocks 18; and after the two valve plate units are rotated away from the mounting plate, the two sides of the bracket limit blocks can each abut and support on the surface of the valve plate unit to limit the valve plate unit from continuing to rotate.

[0048] In this way, by bending the outer end of the frame support block to form a support limit block, the maximum rotation angle of the valve plate unit can be better limited, and the structural design is more reasonable.

[0049] In this specific embodiment, a position on the clearance opening corresponding to the far side of the valve plate unit is provided with an extending protrusion 19 protruding inwardly.

[0050] In this way, by designing the extended protrusion, the valve plate unit can be better supported.

[0051] In summary, in the above-mentioned novel oil fume exhaust fire check valve structure, by designing the valve plate into two independently designed ones and then providing a torsion spring mechanism, the two valve plate units can be respectively attached to and sealed with the mounting plate, making the valve plate work more reliably.

[0052] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A novel oil fume exhaust fire prevention check valve, comprising a housing, a pipe is arranged on the housing, and a valve plate is rotatably hinged to one end of the corresponding pipe through a hinged mounting structure; the characteristics are: The hinged mounting structure includes a mounting plate arranged at intervals on the outside of one end of the pipeline, the edge of the mounting plate is bent inward to form a cylindrical connecting cylinder and connected to the outer shell; a mounting shaft is arranged on the outside of the mounting plate, and the valve plate includes valve plate units arranged in pairs on both sides of the mounting shaft, the inner sides of the valve plate units are rotatably hinged on the mounting shaft through a hinge structure, and the mounting plates are respectively provided with yield openings corresponding to the valve plate units, and a torsion spring mechanism is provided on the mounting shaft, and two torsion force application ends of the torsion spring mechanism are respectively connected to the valve plate unit so that the valve plate units can each be attached and sealed at the edge position of the yield opening on the mounting plate.

2. A novel oil fume exhaust fire prevention check valve as claimed in claim 1, characterized in that: The mounting plate is designed in a circular plate-shaped structure; and the upper end of the mounting plate is inclined toward the pipeline.

3. A novel oil fume exhaust fire prevention check valve as claimed in claim 1, characterized in that: The inner end of the connecting tube is bent vertically outward to form a fixing plate with a rectangular structure design and is connected and fixed inside the shell.

4. A novel oil fume exhaust fire prevention check valve as claimed in claim 1, characterized in that: The valve plate unit comprises a frame plate with a semicircular structure design, a hinge block is connected to the inner side of the frame plate, hinge protrusions are respectively provided at both ends of the hinge block, and the installation shaft is inserted into the hinge hole of the hinge protrusion; and a sealing ring is sleeved on the edge of the frame plate.

5. A novel oil fume exhaust fire prevention check valve as claimed in claim 4, characterized in that: The torsion spring mechanism comprises a torsion spring sleeved on the mounting shaft, and the two torsion bars of the torsion spring respectively form the torsion force application end; and the torsion bars respectively abut and support on the hinge block.

6. A novel oil fume exhaust fire prevention check valve as claimed in claim 4, characterized in that: The inner surface of the frame plate is partially extruded outward to form an extrusion pit, and an extrusion protrusion is formed at a position on the outer surface of the frame plate corresponding to the extrusion pit.

7. A novel oil fume exhaust fire prevention check valve as claimed in claim 1, characterized in that: The mounting shaft is arranged vertically as a whole; and mounting brackets are respectively provided on the mounting plate and at the vertical ends of the corresponding mounting shaft, the mounting brackets include a bracket fixing block connected and fixed to the mounting plate, and the bracket fixing block is integrally formed with a bracket support block arranged outward, and the two ends of the mounting shaft are respectively inserted into the fixing holes connected to the bracket support block.

8. A novel oil fume exhaust fire prevention check valve as claimed in claim 7, characterized in that: The outer ends of the bracket support blocks are bent to form bracket limit blocks; and after the two valve plate units rotate in a direction away from the mounting plate, the two sides of the bracket limit blocks can each abut and support on the surface of the valve plate unit to limit the valve plate unit from continuing to rotate.

9. A novel oil fume exhaust fire prevention check valve as claimed in claim 1, characterized in that: An extending protrusion protruding inwards is provided at a position on the clearance port corresponding to the far side of the valve plate unit.

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