Quick-release type easy-to-maintain smoke-exhausting fireproof check valve

Abstract

The invention relates to the technical field of check valve devices, in particular to a quick-release easy-maintenance smoke-discharging fireproof check valve which comprises a smoke-discharging face shell, a smoke inlet pipe used for discharging smoke is fixedly connected to the left end of the smoke-discharging face shell, a movable sleeve and a supporting ring are arranged in the smoke-discharging face shell, and two sealing blade plates are rotationally installed at the inner end of the movable sleeve; when smoke enters the movable sleeve through the smoke inlet pipe, a rectangular hole is formed in the bottom end of the smoke exhaust face shell, a sealing plate is installed in the rectangular hole, the sealing plate abuts against the movable sleeve, and the sealing plate can be detached, so that the movable sleeve can be taken out from the interior of the smoke exhaust face shell; and the connecting ring is rotated by using a dismounting tool, so that the central pipe is disconnected from the connecting block, the movable sleeve and the supporting ring can be integrally taken out, large-scale dismounting of the whole pipeline system is avoided, the complexity and the time cost of maintenance operation are remarkably reduced, and meanwhile, the movable sleeve and the supporting ring are conveniently cleaned and overhauled.

Description

Technical Field

[0001] This invention relates to the field of check valve technology, specifically a quick-release, easy-maintain smoke exhaust and fireproof check valve. Background Technology

[0002] Smoke exhaust fire prevention backflow valve is a type of valve device installed in ventilation, air conditioning and smoke exhaust ducts. Its basic function is to ensure unidirectional airflow during duct operation and to prevent smoke backflow in the event of abnormal airflow or fire. This type of device is usually composed of valve body, sealing blade, transmission mechanism and reset component. Its structure and function belong to the typical valve technology field.

[0003] Existing smoke exhaust and fire prevention check valves still have shortcomings in use. First, the valve body mostly adopts an integral fixed installation structure. When internal components need to be maintained or replaced, it is often necessary to disassemble the pipeline system on a large scale. The maintenance operation is complicated, time-consuming and costly, which is not conducive to daily inspection and cleaning. Second, some devices lack a reliable locking structure in high-temperature environments. The sealing blade may still rotate under the impact of smoke, which may lead to smoke backflow and pose a safety hazard. Therefore, this application proposes a quick-release and easy-maintain smoke exhaust and fire prevention check valve. Summary of the Invention

[0004] The purpose of this invention is to provide a quick-release, easy-maintain smoke exhaust and fire prevention check valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a quick-release, easy-maintain smoke exhaust fireproof check valve, comprising a smoke exhaust face shell, a smoke inlet pipe for smoke exhaust fixedly connected to the left end of the smoke exhaust face shell, a guide rail fixedly installed on the inner end of the smoke exhaust face shell by bolts, and a movable sleeve and a support ring respectively provided inside the smoke exhaust face shell, the movable sleeve being slidably connected to the guide rail, two sealing blades being rotatably installed on the inner end of the movable sleeve, when smoke enters the interior of the movable sleeve through the smoke inlet pipe, the two sealing blades are pushed to rotate under air pressure, a rectangular hole is provided at the bottom end of the smoke exhaust face shell, a sealing plate is installed in the rectangular hole, the sealing plate abuts against the movable sleeve, and the sealing plate is detachable, thereby allowing the movable sleeve to be removed from the interior of the smoke exhaust face shell.

[0006] As a further embodiment of the present invention, a central shaft is fixedly installed inside the movable sleeve, and a driven gear is fixedly installed at one end of each of the two sealing blades that are close to each other. The two driven gears mesh with each other, and the driven gears are engaged with the central shaft by a reset torsion spring. Under the meshing action of the two driven gears, the sealing blades can rotate in opposite directions.

[0007] As a further embodiment of the present invention, two locking sleeves are fitted on the outer surface of the central shaft, and two locking blocks are fixedly installed on the outer surface of the locking sleeves. The two locking blocks correspond to two sealing blades respectively. The outer surface of the sealing blades is provided with a slot, and the slot and the locking block are parallel to each other. Folding frames are rotatably installed on the outer surface of the locking sleeves, and the two folding frames are connected by a fuse at their close ends.

[0008] As a further embodiment of the present invention, a central tube is detachably installed at the inner end of the support ring, a central rod is fixedly connected to the inner end of the central tube, a passive frame is sleeved on the outer surface of the central rod, and two auxiliary push rods are fixedly installed on the outer surface of the passive frame. The central tube adopts a detachable installation structure, which can achieve quick disassembly and assembly without disassembling the entire valve body, making it convenient to clean, replace and maintain internal components, and reducing maintenance difficulty and cost.

[0009] As a further embodiment of the present invention, the end of the auxiliary push rod away from the passive frame contacts the outer surface of the sealing blade. The passive frame and the central tube are connected by a return spring. The auxiliary push rod acts directly on the outer surface of the sealing blade, which can synchronously push the blade to rotate when the passive frame moves, avoiding jamming caused by oil or resistance, and improving the smoothness of opening and closing.

[0010] As a further embodiment of the present invention, a movable block is sleeved on the outer surface of the central rod. The movable block is located outside the central tube. Multiple support rods are rotatably mounted on the outer surface of the movable block via a rotating shaft. The movable block, sleeved on the outer surface of the central rod, can serve as a mounting base for the support rods. Multiple support rods are rotatably connected via the rotating shaft, so that the internal components of the valve maintain stable force during movement and avoid displacement or shaking.

[0011] As a further embodiment of the present invention, the outer surface of each support rod is fixedly fitted with a connecting sleeve, and the two adjacent connecting sleeves are connected by a passive umbrella surface. The passive frame and the movable block are connected by a push sleeve. The connecting sleeves fitted on the outer surface of the support rod are connected to each other by the passive umbrella surface, so that multiple support rods form an integral linkage structure. During the opening and closing of the valve, the force can be evenly distributed, avoiding deformation or failure of the component due to single-point force.

[0012] As a further embodiment of the present invention, the outer surface of the movable block is provided with a plurality of movable grooves, each of which is provided with a locking pin, and the locking pin is connected to the movable block by an unlocking spring. The outer surface of the support rod is fixedly connected with a locking block, and the outer surface of the locking pin is fixedly installed with a protrusion, which contacts the locking block.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. When using this invention, if maintenance is required, the sealing plate is first removed, and the connecting ring is rotated using a disassembly tool to disconnect the central pipe from the connecting block. This allows the movable sleeve and support ring to be removed as a whole, avoiding large-scale disassembly of the entire pipeline system. This significantly reduces the complexity and time cost of maintenance operations, while also facilitating the cleaning and repair of the movable sleeve and support ring. 2. When the present invention is used, when flames and high-temperature smoke enter the interior of the movable sleeve, the fuse melts at high temperature, driving the locking sleeve to separate under the action of the spring piece, and causing the locking block to automatically embed into the slot, thereby limiting the sealing blade and preventing it from continuing to rotate. This design can realize the automatic locking of the valve in the event of a fire, effectively blocking the backflow of smoke, preventing the occurrence of secondary fires, and improving the safety and reliability of the smoke exhaust fire prevention check valve. 3. The passive frame drives the auxiliary push rod to rotate the sealing blade, which allows the sealing blade to open and close flexibly during use, avoiding obstruction of opening and closing due to oil stains on the outer surface, thus ensuring the reliability and stability of the valve in long-term operation. Attached Figure Description

[0014] Figure 1 Schematic diagram of a backflow preventer; Figure 2 Disassembly diagram of the stop valve; Figure 3 This is a disassembled diagram of the interior of the smoke exhaust panel. Figure 4 This is a structural diagram of the support ring and the movable sleeve; Figure 5 This is a disassembled diagram of the inside of the activity set; Figure 6 This is a diagram showing the positional relationship between the sealing blade and the central shaft; Figure 7 This is a schematic diagram of the central tube structure; Figure 8 This is a cross-sectional view of the central tube; Figure 9 This is a diagram showing the positional relationship between the passive frame and the locking hook; Figure 10 This is a schematic diagram of the internal structure of the active block; Figure 11 This is a diagram showing the positional relationship between the support rod and the locking pin.

[0015] In the diagram: 1. Exhaust surface shell; 2. Stabilizing blade; 3. Inlet pipe; 101. Sealing plate; 102. Support ring; 103. Movable sleeve; 104. Guide rail; 105. Central tube; 201. Sealing blade; 202. Driven gear; 203. Return torsion spring; 204. Central shaft; 205. Locking sleeve; 206. Locking block; 207. Folding frame; 208. Fuse; 209. Slot; 210. Connecting block; 301. Movable block; 302. Passive umbrella canopy; 303. Passive frame; 304. Auxiliary push rod; 305. Connecting ring; 306. Return spring; 307. Center rod; 308. Push sleeve; 309. Connecting sleeve; 310. Locking block; 311. Support rod; 312. Auxiliary torsion spring; 313. Unlocking spring; 314. Locking pin. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figures 1-3 A quick-release, easy-maintain smoke exhaust fireproof backflow preventer valve includes a smoke exhaust face shell 1. A smoke inlet pipe 3 for smoke exhaust is fixedly connected to the left end of the smoke exhaust face shell 1, and a stabilizing blade 2 is fixedly welded to the end of the smoke exhaust face shell 1 away from the smoke inlet pipe 3. Multiple screw holes are opened on the outer surface of the stabilizing blade 2 so that the device can be better fixed in the designated position. The inner end of the exhaust surface 1 is fixedly mounted with a guide rail 104 by bolts. The interior of the exhaust surface 1 is provided with a movable sleeve 103 and a support ring 102. The movable sleeve 103 is slidably connected to the guide rail 104. The movable sleeve 103 and the support ring 102 are detachably connected by a pin-type lock. This structure is a mature existing technology and will not be described in detail here. The inner end of the movable sleeve 103 is rotatably mounted with two sealing blades 201. When smoke enters the interior of the movable sleeve 103 through the smoke inlet pipe 3, the two sealing blades 201 are pushed to rotate under the action of air pressure. The bottom end of the exhaust surface 1 is provided with a rectangular hole. A sealing plate 101 is installed in the rectangular hole by bolts. The sealing plate 101 abuts against the movable sleeve 103 and the sealing plate 101 can be disassembled, so that the movable sleeve 103 can be removed from the interior of the exhaust surface 1.

[0018] like Figures 4-6As shown, a central shaft 204 is fixedly welded inside the movable sleeve 103. A driven gear 202 is fixedly welded to one end of each of the two sealing blades 201 that are close to each other. The two driven gears 202 mesh with each other, and the driven gears 202 and the central shaft 204 are engaged by a return torsion spring 203. Under the meshing action of the two driven gears 202, the sealing blades 201 can rotate in opposite directions and compress the return torsion spring 203. Then, they are reset under the action of the return torsion spring 203's own elasticity. It is worth noting that the central shaft 204 is divided into two sections, located on the upper and lower sides of the sealing blades 201 respectively. Two locking sleeves 205 are fitted on the outer surface of the central shaft 204. Two locking blocks 206 are fixedly installed on the outer surface of the locking sleeves 205. The two locking blocks 206 correspond to the two sealing blades 201 respectively. The outer surface of the sealing blade 201 is provided with a groove 209, and the groove 209 and the locking block 206 are parallel to each other. In the default state, the two locking sleeves 205 move in a direction away from each other, so that the locking blocks 206 are embedded in the groove 209. At this time, the sealing blade 201 cannot rotate due to the limiting effect of the locking blocks 206. Specifically, the locking sleeves 205 and the central shaft 204 are connected by a spring piece. In the event of a fire, to prevent public smoke pipes or external flames from entering the smoke exhaust casing 1, the outer surface of the locking sleeve 205 is equipped with folding brackets 207 that are rotatably mounted on a pivot. The two folding brackets 207 are connected at their closest ends by a fuse 208. When a fire occurs, flames and high-temperature smoke enter the movable sleeve 103 through the public smoke exhaust pipe, causing the fuse 208 to melt under high temperature. Subsequently, the two locking sleeves 205 move away from each other under the elastic force of the spring, locking the sealing blade 201, thereby effectively preventing secondary fires.

[0019] Example 2: Please refer to Figure 4 , Figure 7 , Figure 8 A quick-release, easy-maintain smoke exhaust and fireproof check valve, based on embodiment 1, has a central tube 105 detachably installed on the inner end of the support ring 102, a central rod 307 fixedly welded to the inner end of the central tube 105, a passive frame 303 sleeved on the outer surface of the central rod 307, and two auxiliary push rods 304 fixedly installed on the outer surface of the passive frame 303, with one end of the auxiliary push rod 304 away from the passive frame 303 contacting the outer surface of the sealing blade 201, and the passive frame 303 and the central tube 105 connected by a return spring 306; When the passive frame 303 moves toward the sealing blade 201, it will drive the auxiliary push rod 304 to move. Then, during the movement, the auxiliary push rod 304 will push the sealing blade 201 to rotate, preventing the sealing blade 201 from being obstructed from opening and closing due to oil stains on its outer surface during long-term use. It is worth noting that a magnet is fixedly connected to the end of the auxiliary push rod 304, and a magnetic sheet is partially attached to the outer surface of the sealing blade 201 (here, "partially" refers to the part of the movement trajectory of the auxiliary push rod 304), so that the auxiliary push rod 304 can always be in contact with the outer surface of the sealing blade 201. The sealing blade 201 is made of aluminum, which is lightweight, and can better drive the sealing blade 201 to rotate when smoke and dust pass by.

[0020] like Figures 8-11 As shown, a movable block 301 is sleeved on the outer surface of the central rod 307. The movable block 301 is located outside the central tube 105. Multiple support rods 311 are rotatably mounted on the outer surface of the movable block 301 via a rotating shaft. A limiting block is provided on the outer surface of the movable block 301. The limiting block contacts the support rod 311 and is used to restrict the support rod 311 from rotating away from the central tube 105. A connecting sleeve 309 is fixedly sleeved on the outer surface of each support rod 311. Two adjacent connecting sleeves 309 are connected by a passive umbrella surface 302. When smoke passes by, the passive umbrella surface 302 is opened by the support rod 311. At this time, the flowing smoke drives the movable block 301 to move through the passive umbrella surface 302. The passive frame 303 is connected to the movable block 301 by a push sleeve 308. The outer surface of the movable block 301 is provided with multiple movable slots, and each movable slot is provided with a locking pin 314. The locking pin 314 is connected to the movable block 301 by an unlocking spring 313. Specifically, the locking pin 314 is arranged in a ring and corresponds to the edge of the central tube 105. The movable block 301 moves toward the central tube 105 until the outer surface of the locking pin 314 contacts the end of the central tube 105. As the movable block 301 continues to move, the locking pin 314 moves and compresses the unlocking spring 313. The support rod 311 is connected to the movable block 301 by an auxiliary torsion spring 312. More specifically, a locking block 310 is fixedly connected to the outer surface of the support rod 311, and a protrusion is fixedly installed on the outer surface of the locking pin 314. The protrusion contacts the locking block 310. Under the interaction of the two, the support rod 311 cannot rotate. When the locking pin 314 moves, the protrusion and the locking block 310 disengage, and the support rod 311 can rotate freely.

[0021] like Figure 4 , Figure 6 , Figure 7As shown, a connecting block 210 is fixedly installed between the two central shafts 204. The connecting block 210 is "T" shaped and parallel to the fuse 208. A connecting ring 305 is fixedly installed on the outer surface of the central tube 105 and threaded onto the outer surface of the connecting block 210.

[0022] The working principle of this invention is: During operation, flue gas enters the interior of the exhaust face shell 1 through the inlet pipe 3. At this time, the flowing flue gas drives the movable block 301 to move through the passive umbrella surface 302. Subsequently, the movable block 301 drives the passive frame 303 to move through the push sleeve 308. At this time, the passive frame 303 pushes the sealing blade 201 to rotate through the auxiliary push rod 304. The sealing blade 201 also rotates under the flow of flue gas. As the movable block 301 moves towards the central tube 105, until the outer surface of the locking pin 314 contacts the end of the central tube 105, the continuous movement of the movable block 301 causes the locking pin 314 to move and compress the unlocking spring 313. The protrusion and the locking block 310 disengage. At this time, the support rod 311 can rotate freely. The passive umbrella surface 302 wraps around the outer surface of the central tube 105, which can effectively reduce the pollution of the central tube 105 and its internal structure by pollutants in the flue gas.

[0023] When the flue gas stops flowing, the passive frame 303 and the movable block 301 return to their initial positions under the elastic force of the return spring 306, while the auxiliary push rod 304 returns to its initial position under the elastic force of the auxiliary torsion spring 312. At the same time, the sealing blade 201 also resets under the elastic force of the return torsion spring 203. When a fire occurs, flames and high-temperature smoke enter the interior of the movable sleeve 103 through the common smoke exhaust duct, causing the fuse 208 to melt under high temperature. Subsequently, the two locking sleeves 205 move away from each other under the elastic force of the spring, causing the locking block 206 to embed into the slot 209. At this time, the sealing blade 201 cannot rotate due to the limiting effect of the locking block 206, thus effectively preventing the occurrence of secondary fire. If maintenance is required, remove the sealing plate 101, and then use a disassembly tool to rotate the connecting ring 305 to disconnect the connection between the central tube 105 and the connecting block 210. At this time, the movable sleeve 103 and the support ring 102 can be removed together for easy cleaning.

[0024] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A quick-release, easy-maintain smoke exhaust fireproof check valve, comprising a smoke exhaust faceplate (1), characterized in that: The left end of the exhaust shell (1) is fixedly connected to a smoke inlet pipe (3) for exhausting smoke. The inner end of the exhaust shell (1) is fixedly installed with a guide rail (104). The interior of the exhaust shell (1) is provided with a movable sleeve (103) and a support ring (102). The movable sleeve (103) is slidably connected to the guide rail (104). The inner end of the movable sleeve (103) is rotatably installed with two sealing blades (201). When smoke enters the interior of the movable sleeve (103) through the smoke inlet pipe (3), the two sealing blades (201) are pushed to rotate under the action of air pressure. The bottom end of the exhaust shell (1) is provided with a rectangular hole. A sealing plate (101) is installed in the rectangular hole. The sealing plate (101) abuts against the movable sleeve (103). The sealing plate (101) can be disassembled, so that the movable sleeve (103) can be taken out from the interior of the exhaust shell (1).

2. The quick-release, easy-maintain smoke exhaust and fireproof check valve according to claim 1, characterized in that: The movable sleeve (103) has a central shaft (204) fixedly installed inside. The two sealing blades (201) are each fixedly installed with a passive gear (202) at one end close to each other. The two passive gears (202) mesh with each other, and the passive gears (202) are engaged with the central shaft (204) by a reset torsion spring (203). Under the meshing action of the two passive gears (202), the sealing blades (201) can rotate in opposite directions.

3. The quick-release, easy-maintain smoke exhaust and fireproof check valve according to claim 2, characterized in that: Two locking sleeves (205) are fitted on the outer surface of the central shaft (204). Two locking blocks (206) are fixedly installed on the outer surface of the locking sleeves (205). The two locking blocks (206) correspond to the two sealing blades (201) respectively. The outer surface of the sealing blades (201) is provided with a slot (209), and the slot (209) and the locking block (206) are parallel to each other. Folding brackets (207) are rotatably installed on the outer surface of the locking sleeves (205). The two folding brackets (207) are connected by a fuse (208) at their closest ends.

4. The quick-release, easy-maintain smoke exhaust and fireproof check valve according to claim 1, characterized in that: The inner end of the support ring (102) is detachably equipped with a central tube (105), the inner end of the central tube (105) is fixedly connected with a central rod (307), the outer surface of the central rod (307) is fitted with a passive frame (303), and the outer surface of the passive frame (303) is fixedly equipped with two auxiliary push rods (304).

5. A quick-release, easy-maintain smoke exhaust and fireproof check valve according to claim 4, characterized in that: The auxiliary push rod (304) is in contact with the outer surface of the sealing blade (201) at the end away from the passive frame (303). The passive frame (303) is connected to the central tube (105) by a return spring (306).

6. A quick-release, easy-maintain smoke exhaust and fireproof check valve according to claim 5, characterized in that: The outer surface of the central rod (307) is fitted with a movable block (301), the movable block (301) is located outside the central tube (105), and a plurality of support rods (311) are rotatably mounted on the outer surface of the movable block (301).

7. A quick-release, easy-maintain smoke exhaust and fireproof check valve according to claim 6, characterized in that: The outer surface of each support rod (311) is fixedly fitted with a connecting sleeve (309), and two adjacent connecting sleeves (309) are connected by a passive umbrella surface (302). The passive frame (303) and the movable block (301) are connected by a push sleeve (308).

8. A quick-release, easy-maintain smoke exhaust and fireproof check valve according to claim 7, characterized in that: The outer surface of the movable block (301) is provided with multiple movable slots, each of which is provided with a locking pin (314). The locking pin (314) is connected to the movable block (301) by an unlocking spring (313). The outer surface of the support rod (311) is fixedly connected with a locking block (310). The outer surface of the locking pin (314) is fixedly installed with a protrusion, which contacts the locking block (310).

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