CN209781772U

CN209781772U - Fireproof check valve

Info

Publication number: CN209781772U
Application number: CN201920651340.9U
Authority: CN
Inventors: 张伯华; 周立新; 张会来; 张金昌; 果金颖
Original assignee: Langfang Jindun Huatong Technology Co Ltd; BEIJING JINDUN HUATONG TECHNOLOGY Co Ltd
Current assignee: Langfang Jindun Huatong Technology Co Ltd; BEIJING JINDUN HUATONG TECHNOLOGY Co Ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2019-12-13
Anticipated expiration: 2029-05-08

Abstract

The utility model discloses a fire prevention check valve, including disk seat, valve body, gas vent and valve block, the tube-shape valve body of valve body for having the inlet end and giving vent to anger the end, the periphery of the end of giving vent to anger of valve body connect in airtight in the inner edge department of the middle part through-hole of disk seat, the periphery of gas vent makes the inlet end that the upper end of gas vent is close the valve body and the lower extreme is close the end of giving vent to anger of valve body with the inside of being fixed in the valve body with the slope mode with the inner wall of valve body connected, and the upper end of valve block is passed through the valve block connecting axle and is rotated the one side of the end of giving vent to anger of connecting in the upside inner wall of valve body and being located the. The utility model discloses a fire prevention check valve has improved the fire prevention effectively and has separated the cigarette effect, has improved the reliability that the valve block was closed to the device size has been reduced favorably.

Description

Fireproof check valve

Technical Field

The utility model relates to a fire prevention check valve.

Background

In a residential building or a commercial building, a common exhaust duct is usually arranged in upper and lower stories, and kitchens and toilets in all stories are respectively connected with the common exhaust duct so as to exhaust smoke or foul air into the exhaust duct through exhaust devices such as a range hood and the like. In order to prevent the smoke in the common exhaust duct from flowing backwards, check valves are arranged between the exhaust devices in each kitchen and toilet and the common exhaust duct. In addition, in order to prevent smoke and fire in the common exhaust duct from flowing backward into the room when a fire occurs on other floors, it is required that the check valve should be a fire-proof valve that is automatically closed to prevent the spread of the fire when a fire occurs in other rooms.

However, in the fireproof check valve in the prior art, the valve plate is sometimes adhered to the valve body or cannot be completely closed after being contaminated by oil stains in smoke; in addition, some fireproof check valves have the problem that smoke flowing in the exhaust passage interferes with the exhaust of the fireproof check valve; in addition, some fireproof check valves can also cause the problem of failure of the fireproof and smoke-isolating function due to the failure of a locking mechanism; furthermore, it is also desirable to be able to manually close the fire check valve when needed to ensure fire and smoke protection. Therefore, there is still a need for an improved fire check valve to further solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a fire prevention check valve with valve block locking mechanism and application method thereof. Particularly, the utility model provides the following technical scheme.

In one aspect, the utility model provides a fireproof check valve, which is characterized in that the fireproof check valve comprises a valve seat, a valve body, an exhaust port and a valve plate, the valve body is a cylindrical valve body with an air inlet end and an air outlet end, the periphery of the air outlet end of the valve body is hermetically connected with the inner edge of the middle through hole of the valve seat, the periphery of the exhaust port is hermetically connected with the inner wall of the valve body and is fixed in the valve body in an inclined manner, so that the upper end of the exhaust port is close to the air inlet end of the valve body and the lower end of the exhaust port is close to the air outlet end of the valve body, the upper end of the valve plate is rotatably connected with the inner wall of the upper side of the valve body through a valve plate connecting shaft and is positioned on one side of the exhaust port close to the air, the valve plate can rotate downwards around the valve plate connecting shaft under the action of gravity until the exhaust through hole in the middle of the exhaust port is sealed, and an included angle between the axis of the valve body and the normal line of the valve plate is 15-45 degrees.

Furthermore, the lower part of the valve plate is provided with a balancing weight.

Furthermore, the outer fringe cover of valve block is equipped with sealed the pad.

Furthermore, the fireproof check valve also comprises a first locking mechanism arranged on the side surface of the valve seat far away from the air inlet end of the valve body, the first locking mechanism comprises a first lock box, a pressure lever and a hot melt sheet, the first lock box is fixed on the upper part of the valve seat, one end of the pressure lever is rotationally connected in the first lock box through a connecting shaft, the other end of the pressure lever extends to the upper part of the valve plate after extending out of the side opening of the first lock box, a pressure lever spring for pressing the pressure lever to the middle part or the lower part of the valve plate is also arranged in the first lock box, one end of the hot melt sheet is fixed on the valve seat, the other end of the hot melt sheet is provided with a stop block for stopping the pressure lever from rotating to the middle part or the lower part of the valve plate under the action of the pressure lever spring, when the hot melt sheet is intact, the stop block stops the rotation of the pressure lever, and the other end of the pressure lever is far away from the track range of the valve plate rotating around the valve plate connecting shaft, so that the first locking mechanism is in an unlocking state; when the hot melt piece fuses, the stop block falls off and allows the compression bar to rotate towards the middle part or the lower part of the valve plate under the action of the compression bar spring until the other end of the compression bar contacts and presses the valve plate, so that the first locking mechanism is in a locking state.

Furthermore, the first lock box also comprises a limiting block for limiting the rotation range of the pressure rod.

furthermore, the fireproof check valve further comprises a second locking mechanism arranged on the side face, close to the air inlet end of the valve body, of the valve seat, the second locking mechanism comprises a second lock box and a lock pin, the second lock box is fixed to the lower portion of the valve seat, and the head of the lock pin penetrates through holes in the corresponding positions of the second lock box and the lower side wall of the valve body and then enters the valve body.

Furthermore, the fireproof check valve also comprises a rectification shield arranged on the side surface of the valve seat far away from the air inlet end of the valve body, the rectification shield is provided with an upward opening, the lower part of the rectification shield is bent towards the direction of the valve seat to form a streamline shape with a small lower part and a large upper part, and meanwhile, the upper part of the rectification shield is provided with a jet part which contracts inwards.

Furthermore, the second lock box comprises a first limiting plate and a second limiting plate, a knob is arranged at the tail of the lock pin, the head of the lock pin extends upwards to sequentially penetrate through a first through hole of the first limiting plate, a second through hole of the second limiting plate and a through hole at the corresponding position of the lower side wall of the valve body and then enters the valve body, a notch is formed in the edge of the second through hole, a limiting pin and a lock pin spring are arranged on the lock pin, the lock pin spring is sleeved on the lock pin and is positioned between the first limiting plate and the limiting pin, and when the limiting pin is clamped at the lower side of the second limiting plate and the lock pin spring is in a compressed state, the head of the limiting pin leaves a track range of the valve plate rotating around a valve; when the knob is rotated to enable the limiting pin to enter the notch, the lock pin spring extends and pushes the head of the lock pin into the track range of the valve plate rotating around the valve plate connecting shaft, and the second locking mechanism is enabled to be in a locking state.

In the description of the present invention, "substantially" does not exclude the meaning of "completely". For example, a component "substantially free" of Y may also be completely free of Y. "substantially" may be deleted from the definition of the invention if desired. "comprising" includes both the recited factors and also allows for the inclusion of additional, non-deterministic factors. "about", "left or right" and the like refer to +/-5%, +/-4%, +/-3%, +/-2%, +/-1%, +/-0.5% of the standard value, where the concentrations of the components are indicated. "and/or" means that the plurality of terms connected thereby can be used individually or in any combination with each other.

In the present invention, examples are generally described in a certain range, which is only for the purpose of concise and clear explanation, but not for the limitation of the present invention. The ranges recited include sub-ranges as well as all individual values within the range. For example, the range of 1 to 6 includes sub-ranges such as 1 to 3, 1 to 4, 1 to 5, 2 to 4, 2 to 6, 3 to 6, etc., and also includes individual values such as 1, 2, 3, 4, 5, 6 within this range.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Drawings

FIG. 1 is a schematic structural view of the fire check valve of the present invention;

FIG. 2 is a schematic cross-sectional view of the fire check valve of FIG. 1;

FIG. 3 is a schematic view of the fireproof check valve shown in FIG. 1 with the dome removed;

FIG. 4 is a schematic diagram of a second latching mechanism of the fire check valve of FIG. 1;

In the figure: 1-a valve seat; 2-a valve body; 3-an exhaust port; 4, valve plates; 41-connecting piece; 42-valve plate connecting shaft; 43-valve plate sealing gasket; 51-a first lock box; 52-a limiting block; 53-a connecting shaft; 54-a compression bar; 55-a ram head; 56-hot melt sheet; 57-a stop block; 61-a second lock box; 611 — a first limit plate; 612-a second limiting plate; 613-first via hole; 614-second via; 615-a gap; 62-a knob; 63-a locking pin; 64-a limit pin; 65-a detent spring; 7-a rectifying shield; 71-a jet section; 81-a first retaining clip; 82-second retaining clip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, an aspect of the present invention provides a fire-proof check valve, including a valve seat 1, a valve body 2, an exhaust port 3 and a valve sheet 4, wherein an inner edge of a middle through hole of the valve seat 1 is hermetically connected with an outer periphery of an air outlet end of the valve body 2 for fixing the valve body 2 to a side wall of an exhaust flue, the middle of the exhaust port 3 has an exhaust through hole and the outer periphery of the exhaust port 3 is hermetically connected with an inner wall of the valve body 2 in an inclined manner so that an upper end of the exhaust port 3 is close to an air inlet end of the valve body 2 and a lower end is close to the air outlet end of the valve body 2, an upper end of the valve sheet 4 is rotatably connected to an upper inner wall of the valve body 2 through a connecting sheet 41 and a valve sheet connecting shaft 42 and is located at one side of the exhaust port 3 close to the air outlet end of the valve body 2, so, and when wind passes through the valve body 2, the valve plate 4 rotates upwards around the valve plate connecting shaft 42 under the action of wind power so as to open the exhaust through hole in the middle of the exhaust port 3, namely when the fireproof check valve is in an exhaust state, the air flow passing through the exhaust port 3 can blow and push away the valve plate 4. The included angle between the axis of the valve body 2 and the normal line of the valve plate 4 is 15-45 degrees, preferably 20-40 degrees, such as 25 degrees, 30 degrees, 35 degrees and the like, so that the valve plate 4 can be used for sealing the exhaust port 3 under the action of gravity.

In some cases, a weight block for increasing the weight of the valve plate 4 may be provided at a lower end close to the valve plate 4 to facilitate the valve plate 4 to close the exhaust port 3 under the action of gravity. In some cases, the inner edge of the exhaust through hole of the exhaust port 3 matches the outer edge of the valve sheet 4 so that the valve sheet 4 can close the exhaust through hole of the exhaust port 3. In some cases, the outer edge of the valve sheet 4 is also fitted with a gasket made of an elastic material such as rubber to further enhance the sealing action against the exhaust through hole of the exhaust port 3. In some cases, the valve body 2 is cylindrical, the exhaust through hole of the exhaust port 3 is circular, and the valve sheet 4 is circular sheet-like and matches the shape of the exhaust through hole.

Referring to fig. 1-3, the fire check valve further includes a first locking mechanism for automatically locking the valve plate 4 under high temperature conditions such as fire, the first locking mechanism includes a first lock box 51, a press rod 54 and a heat fusible sheet 56, the first lock box 51 is fixed on the upper portion of the valve seat 1 (for example, above the through hole in the middle of the valve seat 1), one end of the press rod 54 is rotatably connected in the first lock box 51 through a connecting shaft 53, the other end of the press rod 54 extends above the valve plate 4 after extending out from the side opening of the first lock box 51 and is provided with a press rod head 55 pointing to the valve plate 4, the first lock box 51 is further provided with a stopper 52 for limiting the rotation range of the press rod 54 and a press rod spring for pressing the press rod 54 toward the middle or lower portion of the valve plate 4, one end of the heat fusible sheet 56 is fixed on the valve seat 1, the other end of the heat fusible sheet 56 is provided with a stopper 57 for stopping the press, when the fireproof check valve is in a normal working state and the hot melt piece 56 is intact, the stop 57 stops the rotation of the pressure lever 54, and the pressure lever head 55 is far away from the track range of the valve plate 4 rotating around the valve plate connecting shaft 42, so that the first locking mechanism is in an unlocked state, and gas is allowed to push away the valve plate 4 to pass through the valve body 2; when the fireproof check valve is in a high-temperature state such as a fire, and the hot melt piece 56 is melted and disconnected, the stop block 57 falls off and does not stop the rotation of the pressure lever 54 any more, the pressure lever 54 rotates towards the middle or lower part of the valve plate 4 under the action of the pressure lever spring until the pressure lever 54 is stopped by the stop block 52, the pressure lever head 55 enters the track range of the rotation of the valve plate 4 around the valve plate connecting shaft 42, contacts and presses the valve plate 4, the valve plate 4 is stopped from rotating, and the valve plate 4 is kept to seal the exhaust through hole of the exhaust port 3, so that the first locking mechanism is in a locking state, gas is prevented from passing through the valve body 2, and high-temperature gas.

In some cases, the pressing rod 54 has elasticity to improve the stability of the rotation of the pressing rod 54 and to increase the pressing force of the pressing rod 54 against the valve sheet 4.

In some cases, the hot melt sheet 56 may be a sheet of hot melt metal or other hot melt material that can be melt broken after being heated at or above its operating temperature for a set time. In other cases, the thermal fuse 56 may be replaced by a memory alloy or bimetallic strip that deforms after a set time at or above its operating temperature such that the stop 57 no longer blocks the plunger 54 and returns to its shape below its operating temperature. The operating temperature and the set time may be arbitrarily determined according to the working environment of the fire check valve and the conventional regulations and requirements of the related art, for example, the operating temperature may be, for example, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200 degrees celsius or more, preferably 70 degrees celsius, and the set time may be, for example, 5, 10, 20, 30, 40, 50, 60 seconds or more, preferably 10 seconds. The thermal fuse 56, the memory alloy or the bimetallic strip are known and commercially available products, and can be selected according to the operating temperature and the set time.

Referring to fig. 1 to 4, the fire check valve further includes a second locking mechanism for manually locking the valve plate 4, the second locking mechanism includes a second lock box 61 and a lock pin 63, the second lock box 61 is fixed on the lower portion of the side surface of the valve seat 1 where the valve body 2 is located, the second lock box 61 includes a first limit plate 611 and a second limit plate 612, the tail of the lock pin 63 is provided with a knob 62, the head of the lock pin 63 extends upward to sequentially pass through a first through hole 613 of the first limit plate 611, a second through hole 614 of the second limit plate 612 and a through hole at a corresponding position of the lower side wall of the valve body 2 and then enter the valve body 2, the edge of the second through hole 614 is provided with a notch 615, the lock pin 63 is provided with a limit pin 64 and a lock pin spring 65 which is sleeved on the lock pin 63 and is located between the first limit plate 611 and the limit pin 64, wherein when the knob 62 is pulled downward to drive the lock pin 63 to move downward so, the knob 62 can be rotated to clamp the limit pin 64 at the lower side of the second limit plate 612, the lock pin spring 65 is in a compressed state, and the head of the limit pin 64 leaves the track range of the valve plate 2 rotating around the valve plate connecting shaft 42, so that the second locking mechanism is in an unlocked state, and gas is allowed to push away the valve plate 4 to pass through the valve body 2; when the knob 62 is turned so that the stopper pin 64 enters the notch 615, the latch spring 65 extends and pushes the head of the latch 63 into the track range where the valve sheet 2 rotates around the valve sheet connecting shaft 42, the valve sheet 2 is blocked from rotating and the valve sheet 2 is kept to close the exhaust through hole of the exhaust port 3, so that the second locking mechanism is in a locked state and prevents gas from passing through the valve body 2. By providing a second locking mechanism, it is advantageously possible to allow the user to close the valve plate 4 and close the outlet 3 at any time, blocking the passage of gas through the valve body 2. For example, when the room is left vacant for a long time, the second locking mechanism can be placed in a locking state to close the exhaust port 3, so that the effects of fire prevention and smoke insulation are ensured.

Under some circumstances, the aforesaid the utility model discloses an among each embodiment of fire prevention check valve, still including setting up rectification guard shield 7 on disk seat 1, work as when fire prevention check valve installs in vertical exhaust passage lateral wall, the bottom and the both sides of rectification guard shield 7 are connected respectively in the bottom and the left and right sides of disk seat 1 for rectification guard shield 7 only has ascending aperture adjustable opening, prevents with this that the flue gas from getting into rectification guard shield 7 and can adapt to various different environment from the below. The lower part of the rectifying shield 7 is bent (tightened) towards the direction of the valve seat 1, so that the rectifying shield 7 forms a streamline shape with a small lower part and a large upper part, and the upper part is provided with a jet part which contracts inwards, so that the resistance and disturbance of the fireproof check valve to the gas flow in the exhaust flue are reduced, and the exhaust resistance of the fireproof check valve to the exhaust flue is reduced.

In some cases, the left and right sides of the valve seat 1 are further provided with a first fixing clip 81 and a second fixing clip 82 for mounting the fire check valve at the exhaust port on the side wall of the exhaust passage.

The fireproof check valve is arranged behind the exhaust flue, smoke from the range hood enters from the air inlet end of the valve body 2, is discharged from the air outlet end of the valve body 2 after the valve plate 4 is pushed open, and enters the exhaust flue, and when the range hood stops working, the valve plate 4 is automatically closed under the action of weight, so that the smoke in the exhaust flue is prevented from flowing backwards. When high-temperature smoke such as fire occurs in the exhaust flue, the hot melt sheet 56 is fused to release the pressure lever 54, the pressure lever 54 rotates under the driving of the pressure lever spring to enable the pressure lever head 55 to press and close the valve plate 4, so that the high-temperature smoke is prevented from flowing backwards through the valve body 2, and the spreading of the fire is effectively avoided. When the second locking mechanism is in a locking state, the valve plate 4 is locked at the closing position by the locking pin 64, and the backflow of smoke is further avoided.

the valve block is obliquely arranged in the valve body, and the valve block is closed by gravity, so that the reliability of closing the valve block is effectively improved, and the size of the device is favorably reduced; simultaneously, utilize the characteristics of the inside slope valve block of immerseing the valve body, the utility model discloses still effectively avoided complicated locking mechanism's use, the cost of saving has just improved the reliability.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a fire prevention check valve, its characterized in that, includes disk seat, valve body, gas vent and valve block, the tube-shape valve body of valve body for having the inlet end and giving vent to anger the end, the periphery of the end of giving vent to anger of valve body connect in airtight the inner edge department of the middle part through-hole of disk seat, the periphery of gas vent makes the upper end of gas vent be close to the inlet end of valve body and the lower extreme is close the end of giving vent to anger of valve body with the inside that is fixed in the valve body with the slope mode with the inner wall of valve body is connected airtight, and the upper end of valve block is passed through the valve block connecting axle and is rotated the upside inner wall of connecting in the valve body and be located the one side of the end of giving vent to anger of gas vent near the valve body for the valve block.

2. The fire protection check valve of claim 1, wherein a weight is provided at a lower portion of the valve plate.

3. The fire resistant check valve of claim 1, wherein a gasket is fitted around the outer periphery of the valve plate.

4. The fire prevention check valve of any one of claims 1 to 3, further comprising a first locking mechanism disposed on a side of the valve seat away from the air inlet end of the valve body, wherein the first locking mechanism comprises a first lock box, a pressure bar and a heat fusion plate, the first lock box is fixed on an upper portion of the valve seat, one end of the pressure bar is rotatably connected to the first lock box through a connecting shaft, the other end of the pressure bar extends from a side opening of the first lock box to a position above the valve plate, a pressure bar spring for pressing the pressure bar toward a middle portion or a lower portion of the valve plate is further disposed in the first lock box, one end of the heat fusion plate is fixed on the valve seat, the other end of the heat fusion plate is provided with a stopper for stopping the pressure bar from rotating toward the middle portion or the lower portion of the valve plate under the action of the pressure bar spring, wherein when the heat fusion plate is intact, the stopper stops the rotation of the pressure bar, the, thereby placing the first locking mechanism in an unlocked state; when the hot melt piece fuses, the stop block falls off and allows the compression bar to rotate towards the middle part or the lower part of the valve plate under the action of the compression bar spring until the other end of the compression bar contacts and presses the valve plate, so that the first locking mechanism is in a locking state.

5. The fire protection check valve of claim 4, wherein the first lock box further comprises a stopper for limiting a rotation range of the pressing rod.

6. The fire check valve of any one of claims 1 to 3, further comprising a second locking mechanism disposed on a side of the valve seat adjacent to the air inlet end of the valve body, wherein the second locking mechanism comprises a second lock case and a lock pin, the second lock case is fixed to a lower portion of the valve seat, and a head of the lock pin enters the valve body after passing through a through hole at a corresponding position on the lower side wall of the valve body and the second lock case.

7. The fire-resistant check valve according to claim 6, wherein the second lock box comprises a first limit plate and a second limit plate, a knob is arranged at the tail of the lock pin, the head of the lock pin extends upwards to pass through a first through hole of the first limit plate, a second through hole of the second limit plate and a through hole at the corresponding position of the lower side wall of the valve body in sequence and then enter the valve body, a notch is arranged at the edge of the second through hole, a limit pin and a lock pin spring are arranged on the lock pin and are sleeved on the lock pin and positioned between the first limit plate and the limit pin, when the limit pin is clamped at the lower side of the second limit plate and the lock pin spring is in a compressed state, the head of the limit pin leaves the track range of the valve plate rotating around the valve plate connecting shaft; when the knob is rotated to enable the limiting pin to enter the notch, the lock pin spring extends and pushes the head of the lock pin into the track range of the valve plate rotating around the valve plate connecting shaft, and the second locking mechanism is enabled to be in a locking state.

8. The fire protection check valve of any one of claims 1-3, further comprising a fairing shield disposed on the valve seat on a side away from the air inlet end of the valve body, the fairing shield having an upward opening, a lower portion of the fairing shield being curved toward the valve seat to form a streamlined shape with a smaller lower portion and a larger upper portion, and an upper portion of the fairing shield being provided with an inwardly converging jet portion.