Fire-fighting ventilation pipeline valve

Abstract

The invention discloses a fire-fighting ventilation pipeline valve and relates to the technical field of fire-fighting ventilation, the fire-fighting ventilation pipeline valve comprises a valve body and a valve cover, a rotary closing unit is arranged in the valve body, a limiting unit is fixedly connected to the middle of the inner side of the valve body, and sealing units are arranged on the left side and the right side in the valve body. Manual closing units are arranged at the left end and the right end of the rear side of the rotary closing unit; and each rotary closing unit comprises a double-head motor and a rotating shaft, a fixing support is arranged on the front side of each rotating shaft, and a rotating arm and a closing cover are arranged on the front side of each rotating shaft. In the process of fire, when the electromagnetic device is powered off or a power supply facility of the electromagnetic device is damaged, the electromagnet loses excitation, the adsorption state of the rotating arm and the closing cover is canceled, and the rotating arm and the closing cover are rotationally closed under the influence of self weight, so that the situation that a control circuit is damaged due to the influence of high temperature in the fire of a traditional fire valve and a pipeline is avoided; and the motor fails to work and cannot be automatically closed, so that the stability is poor.

Description

Technical Field

[0001] The present invention relates to the technical field of fire ventilation, and in particular to a fire ventilation duct valve. Background Art

[0002] Fire valves need to be configured in fire ventilation ducts. When a fire occurs in a building unit, if the fire spreads into the fire duct, the fire valve must be closed to prevent the flow of air between the internal and external environments, which may cause the fire to spread due to the entry of outdoor air with sufficient oxygen content. Currently, the main fire valves include a short pipe with connecting flanges at both ends. Inside the short pipe, there is a valve plate that can rotate around a vertical axis. The valve plate is actuated by an actuating mechanism outside the short pipe. When the plane of the valve plate rotates to be orthogonal to the end face of the short pipe, the valve is fully open. When the valve plate rotates to be parallel to the end face of the short pipe, both sides of the valve plate are abutted against the sealing edge strips inside the short pipe. Specifically, assuming the end where the high-temperature source is located is the front, one side of the valve plate abuts against the sealing edge strip backward, and the other side abuts against the sealing edge strip forward. At this time, the valve plate completely shields the short pipe inside the short pipe, and the valve is completely closed.

[0003] After retrieval, a Chinese patent discloses a fire ventilation duct valve (publication number: CN 116989154B). This patent includes a valve body, a valve core control component, a valve core block, a decontrol lock component, and a thermal expansion drive component fixed inside the valve body and connected to the valve core block. Flange ports are provided on both sides of the valve body. A valve sleeve seat is fixedly installed inside the valve body. Valve core guide holes corresponding to the number of valve core blocks are provided on the surface of the valve sleeve seat. Sealing blocks are provided inside the valve sleeve seat between adjacent valve core blocks. Slide guide plates that slidably abut against the surfaces of the valve core blocks are provided on both sides of the sealing blocks. Although this patent solves the problem of valve control failure caused by the damage of the high-temperature electrical control structure by setting a thermal expansion drive component structure, and realizes autonomous closing control by using the spontaneous expansion of the thermal expansion liquid inside the thermal expansion drive component under high temperature to drive the elongation of the thermal expansion drive component and push the valve core block to move radially, there is a problem that when the fire has not spread to the ventilation duct valve, the thermal expansion drive component is difficult to expand due to insufficient temperature, resulting in the drive component being unable to drive the elongation to push the valve core block to move radially, so that the autonomous closing control effect cannot be achieved, and it is difficult to close the fire ventilation duct valve, and manual closing of the valve is still required. Therefore, it is necessary to design a fire ventilation duct valve to solve the problems raised in the above technical solutions. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies in the prior art and propose a fire ventilation duct valve to solve the problem that the drive component in the above technical solution cannot drive the elongation to push the valve core block to move radially, thereby unable to achieve autonomous closing control.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: A fire ventilation duct valve, comprising a valve body and a valve cover. A rotary closing unit is arranged inside the valve body. A limiting unit is fixedly connected to the middle part of the inner side of the valve body. Sealing units are arranged on both the left and right sides inside the valve body. Manual closing units are arranged at the left and right ends of the rear side of the rotary closing unit; The rotary closing unit includes a double-headed motor. First bevel gears are fixedly installed at the ends of the rotating shafts on the left and right sides of the double-headed motor. Rotating shafts are arranged on both the left and right sides of the double-headed motor. Second bevel gears are fixedly installed at the rear sides of the rotating shafts. The first bevel gears are respectively meshed with the corresponding second bevel gears. Fixed brackets are arranged on the front sides of the rotating shafts. The fixed brackets are respectively fixedly connected to the upper parts of the left and right ends inside the valve body. Rotary arms are fixedly connected to the front sides of the rotating shafts. Closing covers are fixedly connected to the outer sides of the bottoms of the rotary arms.

[0006] Further, an adsorption column is fixedly connected to the middle part of the inner side of the rotary arm. An adsorption block is arranged at the bottom end of the inner side of the rotary arm. The double-headed motor is fixedly installed at the rear part of the outer side of the valve body. The rear ends of the rotating shafts respectively pass through the left and right ends of the rear side of the valve body and extend backward. The rotary arm and the closing cover as a whole are adsorbed on the electromagnet through the adsorption column and the adsorption block, so that the closing cover is in an open state.

[0007] Further, the limiting unit includes an electromagnetic device. Fixed slots are arranged in the middle part and the bottom of the outer side of the electromagnetic device. Electromagnets are fixedly connected inside the fixed slots. A connecting column is arranged at the upper part of the electromagnetic device. The connecting column is fixedly installed at the middle part of the bottom end of the valve cover. The electromagnetic device makes the electromagnet magnetized, and can adsorb the rotary arm.

[0008] Further, the sealing units both include sealing plates. Installation slots are arranged on the inner sides of the sealing plates. Rubber rings are fixedly connected inside the installation slots. A plurality of fixed columns are equidistantly arranged on the outer sides of the sealing plates. The sealing plates are respectively slidably connected to the outer sides of the corresponding fixed columns. The fixed columns are respectively equidistantly fixedly connected to the left and right ends inside the valve body. Springs are arranged on the outer sides of the fixed columns. The sealing performance after the closing cover is closed is increased through the rubber rings.

[0009] Further, the manual closing units both include rotating sleeves and rotating handles. The rear ends of the rotating shafts are respectively rotatably connected to the inner sides of the corresponding rotating sleeves. Protruding blocks are arranged at the rear ends of the rotating shafts. The front sides of the rotating handles are respectively snap-connected to the corresponding protruding blocks. The rotating shafts can be manually rotated by rotating the handles, so that the closing cover is closed from the open state.

[0010] Further, locking bolts are threadedly connected to the rear sides of the raised blocks. Mounting side ears are provided on the left and right sides of the rotating sleeve, and the mounting side ears are fixedly mounted on the left and right ends of the rear side of the valve body housing, facilitating the installation and fixation of the rotating sleeve and the valve body housing through the mounting side ears.

[0011] Further, threaded caps are threadedly connected to the inner sides of the fixed columns to prevent the sealing plate from detaching from the fixed columns.

[0012] Further, connecting flange plates are provided at the left and right ends of the valve body. Sealing support blocks are provided at the front and rear parts of the left and right ends inside the valve body. The front ends of the rotating shafts are rotatably connected to the middles of the corresponding sealing support blocks, enabling the rotating shafts to have a supporting force when rotating inside the valve body through the sealing support blocks.

[0013] In summary, the present invention provides a fire ventilation pipeline valve, having the following beneficial effects: 1. In the normal state, the overall formed by the rotating arm and the closing cover is driven by the double-headed motor to rotate, and the electromagnet is magnetized through the electromagnetic device and adsorbed, keeping it in the normally open state. During a fire, when the electromagnetic device is powered off or the power supply facility of the electromagnetic device is damaged, the electromagnet demagnetizes, canceling the adsorption state of the overall formed by the rotating arm and the closing cover, and it rotates and closes under the influence of its own weight, avoiding the problems of the traditional fire valve and pipeline being affected by high temperature in a fire, resulting in damage to the control circuit, the motor malfunctioning and being unable to close autonomously, and poor stability.

[0014] 2. Through the manual closing unit, when the rotating arm and the closing cover are not rotated and closed under the influence of their own weight, they can be manually rotated to close tightly. Through the sealing unit, when the rotating arm and the closing cover do not need to be closed tightly, the rotating arm and the closing cover push the sealing plate to move outside the fixed column. Under the action of the elastic force of the spring, the rubber ring is closely attached to the closing cover, increasing the sealing performance. At the same time, the rotating arm and the closing cover have a relatively large own weight, preventing the pressure difference between the inside and outside of the pipeline from increasing when the fire is large, resulting in a gap between the closing cover and the rubber ring and causing air leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of a fire ventilation pipeline valve of the present invention; Figure 2 It is the three-dimensional structure schematic diagram of the rotary closing unit, limiting unit, sealing unit and manual closing unit of a fire ventilation pipeline valve of the present invention; Figure 3 It is the three-dimensional structure schematic diagram of a part of the rotary closing unit of a fire ventilation pipeline valve of the present invention; Figure 4Schematic diagram of the partial structure of the rotary closing unit and the three-dimensional structure of the manual closing unit of a fire ventilation duct valve according to the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the limit unit of a fire ventilation duct valve according to the present invention; Figure 6 Schematic diagram of the three-dimensional structure of the sealing unit of a fire ventilation duct valve according to the present invention.

[0016] Description of reference numerals: 1. Valve body; 2. Valve cover; 3. Rotary closing unit; 301. Fixed bracket; 302. Rotating shaft; 303. Rotating arm; 304. Closing cover; 305. Adsorption column; 306. Adsorption block; 307. Double-headed motor; 308. First bevel gear; 309. Second bevel gear; 310. Protruding block; 4. Limit unit; 401. Electromagnetic device; 402. Fixed groove; 403. Electromagnet; 404. Connecting column; 5. Sealing unit; 501. Sealing plate; 502. Installation card slot; 503. Rubber ring; 504. Fixed column; 505. Spring; 506. Threaded nut; 6. Manual closing unit; 601. Rotating sleeve; 602. Rotating handle; 603. Locking bolt; 604. Installation side ear; 7. Sealing support block; 8. Connecting flange. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Embodiment: Please refer to Figure 1 - Figure 6As shown in the figure, the present invention provides a technical solution: a fire ventilation duct valve, including a valve body 1 and a valve cover 2. A rotary closing unit 3 is arranged inside the valve body 1. A limiting unit 4 is fixedly connected to the middle part of the inner side of the valve body 1. Sealing units 5 are arranged on both the left and right sides inside the valve body 1. Manual closing units 6 are arranged at both the left and right ends of the rear side of the rotary closing unit 3; The rotary closing unit 3 includes a double-headed motor 307. First bevel gears 308 are fixedly installed at the ends of the rotating shafts on both the left and right sides of the double-headed motor 307. Rotating shafts 302 are arranged on both the left and right sides of the double-headed motor 307. Second bevel gears 309 are fixedly installed at the rear sides of the rotating shafts 302. The first bevel gears 308 are respectively meshed with the corresponding second bevel gears 309. Fixed brackets 301 are arranged on the front sides of the rotating shafts 302. The fixed brackets 301 are respectively fixedly connected to the upper parts of the left and right ends inside the valve body 1. Rotary arms 303 are fixedly connected to the front sides of the rotating shafts 302. Closing covers 304 are fixedly connected to the outer sides of the bottoms of the rotary arms 303.

[0019] Please refer to Figure 2 and Figure 3 As shown in the figure, an adsorption column 305 is fixedly connected to the middle part of the inner side of the rotary arm 303. An adsorption block 306 is arranged at the bottom end of the inner side of the rotary arm 303. The double-headed motor 307 is fixedly installed at the rear part of the outer side of the valve body 1. The rear ends of the rotating shafts 302 respectively pass through the left and right ends of the rear side of the valve body 1 and extend backward. Through the adsorption column 305 and the adsorption block 306, the whole formed by the rotary arm 303 and the closing cover 304 is adsorbed on the electromagnet 403, so that the closing cover 304 is in an open state.

[0020] Please refer to Figure 5 As shown in the figure, the limiting unit 4 includes an electromagnetic device 401. Fixed slots 402 are arranged in the middle part and the bottom of the outer side of the electromagnetic device 401. Electromagnets 403 are fixedly connected inside the fixed slots 402. A connecting column 404 is arranged at the upper part of the electromagnetic device 401. The connecting column 404 is fixedly installed at the middle part of the bottom end of the valve cover 2. The fixed slots 402 facilitate the installation and fixation of the electromagnets 403. By magnetizing the electromagnets 403 through the electromagnetic device 401, the rotary arm 303 can be adsorbed. When a fire does not occur, it can prevent the closing cover 304 from closing due to damage to the double-headed motor 307. When a fire occurs, the closing cover 304 can be closed by cutting off the power supply.

[0021] Please refer to Figure 6As shown, the sealing unit 5 all includes a sealing plate 501. On the inner side of the sealing plate 501, there are installation card slots 502. Inside the installation card slots 502, there are rubber rings 503 fixedly connected. On the outer side of the sealing plate 501, there are several fixing columns 504 arranged at equal intervals. The sealing plate 501 is respectively slidably connected to the outer sides of the corresponding fixing columns 504. The fixing columns 504 are respectively fixedly connected to the left and right ends inside the valve body 1 at equal intervals. Springs 505 are arranged on the outer sides of the fixing columns 504. The rubber ring 503 is used to increase the sealing performance after the closing cover 304 is closed. At the same time, under the action of the elastic force of the spring 505, the sealing plate 501 is pushed towards the closing cover 304 side to increase the sealing performance.

[0022] Please refer to Figure 2 and Figure 3 As shown, the manual closing unit 6 all includes a rotating sleeve 601 and a rotating handle 602. The rear ends of the rotating shafts 302 are respectively rotatably connected to the inner sides of the corresponding rotating sleeves 601. There are raised blocks 310 arranged at the rear ends of the rotating shafts 302. The front sides of the rotating handles 602 are respectively snap-connected to the corresponding raised blocks 310. The rotating handle 602 can be used to drive the rotating shaft 302 to rotate. When the double-headed motor 307 fails, the closing cover 304 can be manually closed from the open state to the closed state. The raised block 310 facilitates the snap-fitting installation of the rotating handle 602 at the rear end of the rotating shaft 302. The rotating sleeve 601 facilitates the support of the rear end of the rotating shaft 302 and at the same time limits the installation position of the rotating handle 602.

[0023] Please refer to Figure 3 As shown, locking bolts 603 are respectively threadedly connected to the rear sides of the raised blocks 310. Installation side ears 604 are arranged on the left and right sides of the rotating sleeve 601. The installation side ears 604 are fixedly installed at the left and right ends of the rear side of the outer shell of the valve body 1. The rear end of the raised block 310 is locked by the locking bolt 603, so that the rotating handle 602 is fixedly installed at the outer end of the raised block 310. The installation side ear 604 facilitates the installation and fixation of the rotating sleeve 601 to the outer shell of the valve body 1.

[0024] Please refer to Figure 6 As shown, locking nuts 506 are respectively threadedly connected to the inner sides of the fixing columns 504. The locking nut 506 is used to lock the inner end of the fixing column 504 to prevent the sealing plate 501 from detaching from the fixing column 504.

[0025] Please refer to Figure 1 and Figure 2As shown, connection flange plates 8 are provided at both the left and right ends of the valve body 1. Sealing support blocks 7 are provided at the front and rear parts of the inner left and right ends of the valve body 1. The front ends of the rotating shafts 302 are rotatably connected to the middle parts of the corresponding sealing support blocks 7. Through the sealing support blocks 7, the rotating shafts 302 have a supporting force when rotating inside the valve body 1, and at the same time, the internal space of the valve body 1 can be sealed to prevent air leakage in the valve body 1. The connection flange plates 8 facilitate the connection and installation of the valve body 1 with the fire ventilation duct.

[0026] Working principle: Please refer to Figure 1 - Figure 6 As shown, for this kind of fire ventilation duct valve, when in use, when there is no fire, the double-headed motor 307 drives the first bevel gear 308 to rotate, so that the second bevel gear 309 and the rotating shaft 302 rotate inside the fixed bracket 301, driving the overall flip of the rotating arm 303 and the closing cover 304. At the same time, the electromagnetic device 401 magnetizes the electromagnet 403, adsorbing the adsorption column 305 and the adsorption block 306, so that the closing cover 304 is in the normally open state. When a fire is occurring, the electromagnetic device 401 is powered off. Due to the large overall weight of the rotating arm 303 and the closing cover 304, when a fire occurs and the circuit of the double-headed motor 307 is damaged, the rotating arm 303 and the closing cover 304 rotate inside the fixed bracket 301 through the rotating shaft 302, causing the closing cover 304 to close, and pushing the sealing plate 501 to move outside the fixed column 504. Under the action of the elastic force of the spring 505, the rubber ring 503 is closely attached to the closing cover 304, increasing the sealing performance. If the rotating arm 303 and the closing cover 304 are still not closed, it can be done manually. The rotating handle 602 is sleeved on the outside of the protruding block 310, and the rotating handle 602 is rotated to rotate the rotating shaft 302 to close the closing cover 304.

[0027] The above are only the preferred embodiments of the present invention, and are not limitations to the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A fire ventilation duct valve, comprising a valve body (1) and a valve cover (2), characterized in that: Inside the valve body (1), a rotary closing unit (3) is provided. In the middle of the inner side of the valve body (1), a limiting unit (4) is fixedly connected. On both the left and right sides inside the valve body (1), sealing units (5) are provided. On both the left and right ends at the rear side of the rotary closing unit (3), manual closing units (6) are provided; The rotary closing unit (3) includes a double-headed motor (307). At the end parts of the rotating shafts on both the left and right sides of the double-headed motor (307), first bevel gears (308) are fixedly installed. On both the left and right sides of the double-headed motor (307), rotating shafts (302) are provided. At the rear sides of the rotating shafts (302), second bevel gears (309) are fixedly installed. The first bevel gears (308) are respectively meshed with the corresponding second bevel gears (309). At the front sides of the rotating shafts (302), fixed brackets (301) are provided. The fixed brackets (301) are respectively fixedly connected to the upper parts at the left and right ends inside the valve body (1). At the front sides of the rotating shafts (302), rotating arms (303) are fixedly connected. At the outer side of the bottom of the rotating arms (303), closing covers (304) are fixedly connected.

2. The fire ventilation duct valve according to claim 1, characterized in that: At the middle part on the inner side of the rotating arm (303), an adsorption column (305) is fixedly connected. At the bottom end on the inner side of the rotating arm (303), an adsorption block (306) is provided. The double-headed motor (307) is fixedly installed at the rear part outside the valve body (1). The rear ends of the rotating shafts (302) respectively pass through the left and right ends at the rear side of the valve body (1) and extend backward.

3. The fire ventilation duct valve according to claim 1, characterized in that: The limiting unit (4) includes an electromagnetic device (401). At the middle part and the bottom of the outer side of the electromagnetic device (401), fixed slots (402) are provided. Inside the fixed slots (402), electromagnets (403) are fixedly connected. At the upper part of the electromagnetic device (401), a connecting column (404) is provided. The connecting column (404) is fixedly installed at the middle part of the bottom end of the valve cover (2).

4. The fire ventilation duct valve according to claim 1, characterized in that: The sealing units (5) both include sealing plates (501). At the inner side of the sealing plates (501), installation card slots (502) are provided. Inside the installation card slots (502), rubber rings (503) are fixedly connected. At the outer sides of the sealing plates (501), a number of fixed columns (504) are equidistantly arranged. The sealing plates (501) are respectively slidably connected to the outer sides of the corresponding fixed columns (504). The fixed columns (504) are respectively equidistantly fixedly connected to the left and right ends inside the valve body (1). Springs (505) are provided on the outer sides of the fixed columns (504).

5. The fire ventilation duct valve according to claim 1, characterized in that: The manual closing units (6) both include rotating sleeves (601) and rotating handles (602). The rear ends of the rotating shafts (302) are respectively rotatably connected to the inner sides of the corresponding rotating sleeves (601). At the rear ends of the rotating shafts (302), raised blocks (310) are provided. At the front sides of the rotating handles (602), they are respectively snap-connected to the corresponding raised blocks (310).

6. The fire ventilation duct valve according to claim 5, characterized in that: Locking bolts (603) are threadedly connected to the rear sides of the protruding blocks (310). Mounting side ears (604) are provided on the left and right sides of the rotating sleeve (601), and the mounting side ears (604) are fixedly installed at the left and right ends of the rear side of the outer shell of the valve body (1).

7. The fire ventilation duct valve according to claim 4, wherein: Threaded nuts (506) are threadedly connected to the inner sides of the fixing columns (504).

8. The fire ventilation duct valve according to claim 1, characterized in that: Connecting flange plates (8) are provided at the left and right ends of the valve body (1). Sealing support blocks (7) are provided at the front and rear parts of the left and right ends inside the valve body (1), and the front ends of the rotating shafts (302) are rotatably connected to the middles of the corresponding sealing support blocks (7).

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