Smoke exhaust valve with anti-backflow structure

Abstract

The utility model relates to the technical field of smoke exhaust valves, and discloses a smoke exhaust valve with an anti-backflow structure, which comprises a smoke exhaust flue and a smoke exhaust fan, a fan body mounting and dismounting mechanism is arranged outside the smoke exhaust fan, and anti-backflow mechanisms are arranged inside and outside the smoke exhaust flue. According to the smoke exhaust valve with the anti-backflow structure, the fan body mounting and dismounting mechanism is arranged, in the using process, a threaded pipe seat is inserted into a fixing ring frame, positioning can be provided for mounting of a smoke exhaust fan, the positioned smoke exhaust fan can be fixed through a telescopic rod, a spring and a plug, the smoke exhaust fan cannot move during mounting, and the practicability is high. According to the detachable smoke exhaust fan, the installation of the smoke exhaust fan can be assisted, the smoke exhaust fan can be fixed through bolts, the smoke exhaust fan can be detached through reverse operation, the detachable smoke exhaust fan can be detached and cleaned when needed, the situation that the rotating speed is reduced due to the fact that a large amount of dust is attached to the exterior of the smoke exhaust fan is avoided, and the smoke exhaust efficiency is effectively prevented from being reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke exhaust valves, in particular to a smoke exhaust valve with an anti-backflow structure. Background Art

[0002] The smoke exhaust valve is installed at the end of each branch pipe (smoke suction port) of the mechanical smoke exhaust system. It is usually closed and meets the air leakage requirements. It is opened manually or electrically when a fire occurs or smoke exhaust is required, and serves as a smoke exhaust valve.

[0003] According to the description of a smoke exhaust valve with an anti-backflow structure disclosed in the patent website (authorization announcement number: CN220227926U), "the utility model relates to the technical field of smoke exhaust valves, and in particular to a smoke exhaust valve with an anti-backflow structure, including a smoke exhaust pipe, an exhaust fan is connected to the side wall of the inner cavity of the smoke exhaust pipe, and an anti-backflow structure is connected to the side wall of the inner cavity of the smoke exhaust pipe and on one side of the exhaust fan, the anti-backflow structure includes a rotating rod, the rotating rod is connected to the side wall of the smoke exhaust pipe, a driving gear is connected to the end face of the rotating rod, and a driven gear is meshed and connected to the side wall of the driving gear. The utility model arranges an anti-backflow structure in the smoke exhaust valve with an anti-backflow structure, thereby utilizing the reset spring in the anti-backflow structure and the interaction between various components to make the smoke exhaust valve automatically prevent backflow, so that during the use of the smoke exhaust valve with the anti-backflow structure, smoke backflow can be automatically prevented, making it very convenient to use, thereby solving the problem that smoke backflow cannot be automatically prevented."

[0004] In view of the above description, the applicant believes that there are the following problems:

[0005] During use, the utility model can enable the smoke exhaust valve to have the function of preventing smoke backflow through the reset spring and the structure connected thereto. However, in actual use, a large amount of dust will adhere to the exhaust fan after being placed for a long time, and the exhaust fan is not provided with a structure for disassembling it, resulting in the inability to disassemble it for cleaning. The large amount of attached dust will affect its rotation speed, resulting in a decrease in smoke exhaust efficiency. Therefore, it is necessary to improve a smoke exhaust valve with an anti-backflow structure to solve the above problem. Utility Model Content

[0006] The purpose of the utility model is to provide a smoke exhaust valve with an anti-backflow structure to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a smoke exhaust valve with an anti-backflow structure, comprising a smoke exhaust duct and a smoke exhaust fan, a fan body installation and removal mechanism is arranged outside the smoke exhaust fan, and an anti-backflow mechanism is arranged inside and outside the smoke exhaust duct.

[0008] The fan body installation and removal mechanism comprises a fixing component and a positioning and stabilizing component, and the fixing component and the positioning and stabilizing component are both arranged outside the smoke exhaust fan.

[0009] Preferably, the fixing assembly includes a fixing ring frame, the fixing ring frame is fixedly installed on the outside of the smoke exhaust fan, a threaded pipe seat is fixedly installed inside the smoke exhaust duct, a bolt is installed on the internal thread of the threaded pipe seat, and a fixing edge ear is provided on the outside of the bolt to facilitate fixing the positioned smoke exhaust fan through the fixing assembly.

[0010] Preferably, holes are provided at corresponding positions of the fixed ring frame and the threaded pipe seat, and the threaded pipe seat is slidably installed inside the hole opened inside the fixed ring frame, and the inner side of the fixed side ear is fixedly installed with the outside of the smoke exhaust fan, so as to facilitate fixation under normal conditions.

[0011] Preferably, the positioning and stabilizing component includes a fixed side block, the fixed side block is fixedly mounted on the outside of the smoke exhaust fan, a telescopic rod is fixedly mounted on the outside of the fixed side block, a spring is provided inside the telescopic rod, a shift block is fixedly mounted on the outside of the telescopic rod, and a plug is fixedly mounted on the outside of the telescopic rod, so as to facilitate the auxiliary fixing of the smoke exhaust fan by means of the positioning and stabilizing component.

[0012] Preferably, grooves are provided at corresponding positions of the smoke exhaust duct and the plug, and the plug is slidably installed in the groove provided inside the smoke exhaust duct, thereby improving stability.

[0013] Preferably, the anti-backflow mechanism includes a fixed fan frame, the fixed fan frame is fixedly installed inside the smoke exhaust duct, a rotating valve plate is rotatably installed inside the fixed fan frame, a gear is fixedly installed on the top of the rotating valve plate, two gears are provided, and a fixed shaft is fixedly installed on the top of the left gear, and a torsion spring is provided on the outside of the fixed shaft, so as to facilitate the anti-backflow of the smoke exhaust duct through the anti-backflow mechanism.

[0014] Preferably, one end of the torsion spring close to the gear is fixedly installed on the top of the left gear, a fixing column is provided outside the smoke exhaust duct, and one end of the torsion spring away from the gear is fixedly installed on the left side of the fixing column provided outside the smoke exhaust duct, so as to facilitate the rebound of the rotating valve plate through the torsion spring.

[0015] Compared with the prior art, the utility model provides a smoke exhaust valve with an anti-backflow structure, which has the following beneficial effects:

[0016] 1. The smoke exhaust valve with an anti-backflow structure, through the fan body installation and disassembly mechanism set up, can provide positioning for the installation of the smoke exhaust fan by inserting the threaded pipe seat into the interior of the fixed ring frame during use. The positioned smoke exhaust fan can be fixed by using the telescopic rod, spring and plug so that it will not move during installation, which can assist the installation of the smoke exhaust fan. The smoke exhaust fan can be fixed by bolts and can be disassembled by reverse operation. The detachable smoke exhaust fan structure can be disassembled and cleaned when needed, which avoids the reduction of the rotation speed caused by a large amount of dust adhering to the outside of the smoke exhaust fan, and effectively prevents the reduction of the smoke exhaust efficiency.

[0017] 2. The smoke exhaust valve with an anti-backflow structure, through the anti-backflow mechanism set up, can provide a limit for the turning of the rotating valve plate by using the fixed fan frame and the rotating valve plate during use. The rotating valve plate can rebound through the torsion spring to block the fixed fan frame and prevent the smoke from flowing back, thereby realizing the function of providing anti-backflow for the smoke exhaust duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

[0019] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional appearance structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the appearance structure of the fan body installation and removal mechanism of the utility model;

[0022] Figure 4 This is a schematic diagram of the appearance structure of the fixed component of the utility model;

[0023] Figure 5 This is a schematic diagram of the cross-sectional appearance structure of the positioning and stabilizing component of the utility model;

[0024] Figure 6 This is a schematic diagram of the exploded appearance structure of the anti-backflow mechanism of the utility model.

[0025] In the figure: 1. exhaust duct; 2. fan body installation and disassembly mechanism; 21. fixing assembly; 211. fixing ring frame; 212. threaded pipe seat; 213. bolt; 214. fixing side ear; 22. positioning and stabilizing assembly; 221. fixing side block; 222. telescopic rod; 223. spring; 224. dial block; 225. plug; 3. anti-backflow mechanism; 31. fixing fan frame; 32. rotating valve plate; 33. gear; 34. fixing shaft; 35. torsion spring; 4. exhaust fan. DETAILED DESCRIPTION

[0026] 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 in 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.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Embodiment 1:

[0029] See also Figure 1-5 The utility model provides a technical solution: a smoke exhaust valve with an anti-backflow structure, including a smoke exhaust duct 1 and a smoke exhaust fan 4, a fan body installation and removal mechanism 2 is arranged outside the smoke exhaust fan 4, and an anti-backflow mechanism 3 is arranged inside and outside the smoke exhaust duct 1.

[0030] The fan body installation and removal mechanism 2 includes a fixing component 21 and a positioning and stabilizing component 22 , and both the fixing component 21 and the positioning and stabilizing component 22 are arranged outside the smoke exhaust fan 4 .

[0031] Furthermore, the fixing component 21 includes a fixing ring frame 211, which is fixedly installed on the outside of the smoke exhaust fan 4, and a threaded pipe seat 212 is fixedly installed inside the smoke exhaust duct 1. The internal threads of the threaded pipe seat 212 are installed with bolts 213, and the outside of the bolts 213 is provided with fixing side ears 214, so as to facilitate the fixing of the positioned smoke exhaust fan 4 through the fixing component 21.

[0032] Furthermore, holes are opened at corresponding positions of the fixed ring frame 211 and the threaded pipe seat 212, and the threaded pipe seat 212 is slidably installed inside the hole opened inside the fixed ring frame 211, and the inner side of the fixed side ear 214 is fixedly installed with the outside of the smoke exhaust fan 4, which is convenient for fixing under normal conditions.

[0033] Furthermore, the positioning and stabilizing component 22 includes a fixed edge block 221, which is fixedly installed on the outside of the smoke exhaust fan 4. A telescopic rod 222 is fixedly installed on the outside of the fixed edge block 221. A spring 223 is provided inside the telescopic rod 222. A shift block 224 is fixedly installed on the outside of the telescopic rod 222. A plug 225 is fixedly installed on the outside of the telescopic rod 222, so as to facilitate the auxiliary fixing of the smoke exhaust fan 4 by the positioning and stabilizing component 22.

[0034] Furthermore, grooves are provided at corresponding positions of the smoke exhaust duct 1 and the plug 225, and the plug 225 is slidably installed in the groove provided inside the smoke exhaust duct 1, thereby improving stability.

[0035] Embodiment two:

[0036] See also Figure 6 In combination with the first embodiment, it is further obtained that the backflow prevention mechanism 3 includes a fixed fan frame 31, the fixed fan frame 31 is fixedly installed inside the smoke exhaust duct 1, a rotating valve plate 32 is rotatably installed inside the fixed fan frame 31, a gear 33 is fixedly installed on the top of the rotating valve plate 32, two gears 33 are provided, and a fixed shaft 34 is fixedly installed on the top of the left gear 33, and a torsion spring 35 is provided on the outside of the fixed shaft 34, so as to facilitate the backflow prevention of the smoke exhaust duct 1 through the backflow prevention mechanism 3.

[0037] Furthermore, one end of the torsion spring 35 close to the gear 33 is fixedly installed on the top of the left gear 33, a fixing column is provided on the outside of the smoke exhaust duct 1, and one end of the torsion spring 35 away from the gear 33 is fixedly installed on the left side of the fixing column provided on the outside of the smoke exhaust duct 1, so that the rotating valve plate 32 can be rebounded by the torsion spring 35.

[0038] In actual operation, when the device is used, the rotation of the blades of the smoke exhaust fan 4 can assist in the discharge of smoke. The smoke blown toward the rotating valve plate 32 will cause the rotating valve plate 32 to rotate and can be discharged normally. When the smoke is not discharged, the torsion spring 35 will drive the gear 33 to rotate. Under the action of the meshing gear 33, the rotating valve plate 32 rebounds and covers the fixed fan frame 31 to prevent the external smoke from flowing back. When a large amount of dust is attached to the outside of the smoke exhaust fan 4, the bolt 213 is rotated to remove the bolt 213, and the dial block 224 is pressed at this time. , shorten the telescopic rod 222, at this time the plug 225 leaves the groove inside the smoke exhaust duct 1, pull the smoke exhaust fan 4 outward, make the fixed ring frame 211 leave the threaded pipe seat 212, and then the smoke exhaust fan 4 can be disassembled. After the smoke exhaust fan 4 is cleaned, align the fixed ring frame 211 with the threaded pipe seat 212, slide and insert it, when the plug 225 contacts the groove inside the smoke exhaust duct 1, it will pop out under the action of the telescopic rod 222 and the spring 223, and get stuck in the inside of the smoke exhaust duct 1. At this time, turn the bolt 213 to fix the smoke exhaust fan 4.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A smoke exhaust valve with an anti-backflow structure, comprising a smoke exhaust duct (1) and a smoke exhaust fan (4), characterized in that: The smoke exhaust fan (4) is provided with a fan body installation and removal mechanism (2) on the outside, and the smoke exhaust duct (1) is provided with an anti-backflow mechanism (3) on the inside and outside; The fan body installation and removal mechanism (2) comprises a fixing component (21) and a positioning and stabilizing component (22), and the fixing component (21) and the positioning and stabilizing component (22) are both arranged outside the smoke exhaust fan (4).

2. The smoke exhaust valve with anti-backflow structure according to claim 1, characterized in that: The fixing assembly (21) comprises a fixing ring frame (211), the fixing ring frame (211) being fixedly mounted on the outside of the smoke exhaust fan (4), a threaded pipe seat (212) being fixedly mounted inside the smoke exhaust duct (1), a bolt (213) being threadedly mounted inside the threaded pipe seat (212), and a fixing edge ear (214) being arranged outside the bolt (213).

3. The smoke exhaust valve with anti-backflow structure according to claim 2, characterized in that: The fixed ring frame (211) and the threaded pipe seat (212) are provided with holes at corresponding positions, and the threaded pipe seat (212) is slidably mounted inside the hole opened inside the fixed ring frame (211), and the inner side of the fixed side ear (214) is fixedly mounted to the outside of the smoke exhaust fan (4).

4. The smoke exhaust valve with anti-backflow structure according to claim 1, characterized in that: The positioning and stabilizing component (22) comprises a fixed edge block (221), the fixed edge block (221) is fixedly mounted on the outside of the smoke exhaust fan (4), a telescopic rod (222) is fixedly mounted on the outside of the fixed edge block (221), a spring (223) is arranged inside the telescopic rod (222), a shift block (224) is fixedly mounted on the outside of the telescopic rod (222), and a plug (225) is fixedly mounted on the outside of the telescopic rod (222).

5. The smoke exhaust valve with anti-backflow structure according to claim 4, characterized in that: Grooves are provided at corresponding positions of the smoke exhaust duct (1) and the plug (225), and the plug (225) is slidably installed inside the groove provided inside the smoke exhaust duct (1).

6. The smoke exhaust valve with anti-backflow structure according to claim 1, characterized in that: The anti-backflow mechanism (3) comprises a fixed fan frame (31), wherein the fixed fan frame (31) is fixedly installed inside the smoke exhaust duct (1), a rotating valve plate (32) is rotatably installed inside the fixed fan frame (31), a gear (33) is fixedly installed on the top of the rotating valve plate (32), two gears (33) are provided, and a fixed shaft (34) is fixedly installed on the top of the left gear (33), and a torsion spring (35) is provided on the outside of the fixed shaft (34).

7. The smoke exhaust valve with anti-backflow structure according to claim 6, characterized in that: One end of the torsion spring (35) close to the gear (33) is fixedly mounted to the top of the left gear (33), a fixing column is arranged outside the smoke exhaust duct (1), and one end of the torsion spring (35) away from the gear (33) is fixedly mounted to the left side of the fixing column arranged outside the smoke exhaust duct (1).

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