CN210661517U

CN210661517U - Fireproof check valve

Info

Publication number: CN210661517U
Application number: CN201921148938.2U
Authority: CN
Inventors: 聂法玉; 谭源生; 蒋光琼
Original assignee: Guangzhou Fayu Environmental Protection Technology Co ltd
Current assignee: GUANGZHOU CAIDIE ENERGY-SAVING TECHNOLOGY Co.,Ltd.
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-06-02
Anticipated expiration: 2029-07-19

Abstract

The utility model provides a fireproof check valve, which comprises a valve body, a valve seat, a valve block and an opening stopping mechanism, wherein the valve seat is fixed in the valve body, and an exhaust port is arranged on the valve seat; the valve plate is arranged on the valve body in an openable and closable manner and can cover the exhaust port; the opening stopping mechanism is used for limiting the valve plate at the closed valve position; the opening stopping mechanism comprises a mounting seat, an opening stopping connecting rod, a fuse link and a return spring, wherein the mounting seat is detachably arranged on the valve body and is positioned below one side, away from the valve seat, of the valve plate; the mounting seat is provided with a first rotating shaft, the return spring is sleeved on the first rotating shaft, and the rotating end of the opening stopping connecting rod is hinged to the first rotating shaft and tightly presses the return spring; fuse link one end is fixed on the mount pad, and the other end of fuse link is connected to the connecting rod of ending to open in order to restrict the rotation of the connecting rod of ending around first pivot. The utility model discloses a setting is at the opening mechanism that ends at valve block rear, when the conflagration breaing out, forces to close the valve block to avoid stretching of conflagration.

Description

Fireproof check valve

Technical Field

The utility model belongs to the technical field of the house exhaust passage, concretely relates to fire prevention check valve.

Background

The fire-proof check valve is one of the important components of residential exhaust duct system, and it integrates three functions of fire-proof, check and flow-guiding into one body. The fireproof function of the fireproof door ensures the safety of houses and prevents fire from spreading; the non-return function ensures the health and comfort of the house and prevents the smoke and odor from escaping; the diversion function of the device reduces the air resistance of the gas and ensures the smooth emission of the flue gas.

At present, the fireproof check valves in the prior art have different fireproof structures, for example, chinese patent application No. cn200920212736.x discloses a side-opening fireproof check valve, which is installed and fixed on the outer wall of an exhaust passage, the fireproof check valve consists of a check valve and a fireproof valve, the check valve and the fireproof valve are connected through a fixing piece, the fireproof valve comprises a reversible cover plate and a base for installing the cover plate, the cover plate is supported by a spring and a fusible support part to be in a normally open state, one end of the support part is connected with a valve body of the fireproof valve, and the other end is connected with the cover plate, wherein the reversible cover plate is in a side-opening type, is laterally installed on the fireproof valve and can be transversely turned around a shaft to close or open an opening; the fusible support member includes at least two fusing points.

For another example, chinese patent application 201710954705.0 discloses a fire prevention check valve, include the valve body and locate the valve block in the valve body, its characterized in that still includes locking device, locking device includes drive valve block closed drive arrangement and spacing drive arrangement's hot melt retaining member, when hot melt retaining member did not melt, locking device locked drive arrangement, the valve block can normally be opened and support and carry out spacingly on drive arrangement, when hot melt retaining member melted, locking device removed the locking to the valve block, drive arrangement drive valve block is in the closed condition.

The fire-proof structure in the prior art is complex, and the stability of the structure is poor.

SUMMERY OF THE UTILITY MODEL

To prior art's defect, the utility model provides a fire prevention check valve, it is through setting up the opening mechanism that ends at the valve block rear, when the conflagration breaing out, forces to close the valve block to avoid stretching of conflagration.

In order to achieve the purpose, the utility model provides a fireproof check valve, which comprises a valve body, a valve seat, a valve plate and an opening stopping mechanism, wherein the valve seat is fixed in the valve body and is provided with an air outlet; the valve plate is arranged on the valve body in an openable and closable manner and can cover the exhaust port; the opening stopping mechanism is used for limiting the valve plate at the closed valve position; the opening stopping mechanism comprises a mounting seat, an opening stopping connecting rod, a fuse link and a return spring, wherein the mounting seat is detachably arranged on the valve body and is positioned below one side, away from the valve seat, of the valve plate; the mounting seat is provided with a first rotating shaft, the return spring is sleeved on the first rotating shaft, and the rotating end of the opening stopping connecting rod is hinged to the first rotating shaft and tightly presses the return spring; fuse link one end is fixed on the mount pad, and the other end of fuse link is connected to the connecting rod of ending to open in order to restrict the rotation of the connecting rod of ending around first pivot.

In the above technical solution of the present invention, the opening stopping mechanism is disposed outside the valve opening position of the valve block, and in the normal exhaust stage, the opening stopping mechanism does not contact with the valve block, and does not affect the opening or closing of the valve block; in the stage of fire, the fuse link is fused at high temperature, the constraint on the opening stopping mechanism is lost after the fuse link is fused, and the rotating end of the opening stopping connecting rod rotates around the first rotating shaft under the action of the return spring until the working end of the opening stopping connecting rod abuts against the valve plate, so that the opening of the valve plate is limited.

According to the utility model discloses a another kind of embodiment, the connection piece that is provided with outside outstanding on the end-to-open connecting rod, fixed connection between fuse link and the connection piece.

According to the utility model discloses a another kind of embodiment, at the in-process that opens and shuts of valve block, the work end of ending the connecting rod sets up to producing the position with the valve block and interferes, and is concrete, ends the vertical setting of connecting rod or opens the direction slope setting towards the valve block.

According to the utility model discloses a another kind of embodiment, after the fuse link took place the fusing action, under the drive of return spring, the work end butt of stopping open the connecting rod to the central authorities of valve block.

Furthermore, a thrust surface structure matched with the valve plate is arranged at the working end of the opening stopping connecting rod so as to enhance acting force.

According to the utility model discloses a another kind of embodiment, the mount pad still is provided with the valve shaft, and the valve block passes through the backing sheet and rotates to be connected to the valve shaft, and wherein, the valve shaft is located the below of disk seat.

As an extension of the utility model, the opening stopping mechanism is also provided with a locking sheet; a second rotating shaft and a locking spring sleeved on the second rotating shaft are arranged on the mounting seat, and the second rotating shaft is positioned between the valve shaft and the first rotating shaft; one end of the locking sheet is hinged to the second rotating shaft and is arranged to be pressed against the locking spring, the other end of the locking sheet is provided with a barb, and the barb is buckled and pressed on one side edge of the opening stopping connecting rod, which is far away from the valve sheet; wherein the locking piece is arranged to be limited by the open-stop connecting rod or the fuse link.

Preferably, the hinged end of the opening stopping connecting rod is provided with an arc-shaped matching part, the locking piece is limited by the opening stopping connecting rod, and after the fusing action of the fusing piece, the locking piece and the opening stopping connecting rod rotate synchronously or asynchronously; wherein, the barb is connected with the arc-shaped matching part in a matching way, and a humanoid anti-falling structure is formed between the locking sheet and the opening stopping connecting rod.

Preferably, the arc-shaped matching part is provided with anti-slip teeth.

Furthermore, in the height direction, the first rotating shaft and the second rotating shaft are mutually flush.

The utility model discloses possess following beneficial effect:

the opening stopping mechanism is arranged on the outer side of the valve block, so that the opening stopping mechanism can not generate any interference on the opening of the valve block under normal conditions, and the valve block is favorable for having a larger opening angle; under the conflagration condition, through stopping opening the connecting rod butt to the valve block to the appearance of the phenomenon of leaking cigarette gas leakage is avoided in opening of restriction valve block.

The utility model provides an end opening mechanism is provided with mechanical type stay, can lock the end opening connecting rod, forms humanoid anti-disengaging structure between stay and the end opening connecting rod, and the steadiness can be good, and the fire prevention leakproofness is strong.

The present invention will be described in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural view of the fire check valve of the present invention, showing the normal state of the opening stop mechanism;

FIG. 2 is a schematic structural view of the fire check valve of the present invention, showing the fire-proof state of the opening stop mechanism;

FIG. 3 is a schematic cross-sectional view of the fire check valve of the present invention;

FIG. 4 is a schematic structural view of the stop mechanism of the fire check valve of the present invention;

fig. 5 is another view structure diagram of the stop mechanism of the fire check valve of the present invention.

Detailed Description

As shown in fig. 1-5, a fire-proof check valve comprises a valve body 1, a valve seat 2, a valve plate 3 and an opening stop mechanism 4.

The valve seat 2 is fixed in the valve body 1, and an exhaust port 21 is formed on the valve seat 2; the valve body 1 is provided with a valve shaft 11, the valve plate 3 can be arranged on the valve body 1 around the valve shaft 11 in an opening and closing manner, and the valve plate 3 covers the exhaust port 21 in a normal state so as to prevent the phenomena of smoke and odor tainting.

The opening stopping mechanism 4 comprises a mounting seat 41, an opening stopping connecting rod 42, a fuse link 43 and a return spring 44;

the mounting base 41 is detachably fixed on the valve body 1, and is disposed in the lower area of the valve plate 3 and located on the side of the valve plate 3 away from the valve seat 2, wherein the valve shaft 11 is disposed on the mounting base 41, and the valve plate 3 is pivotally connected to the valve shaft 11 through the support plate 31.

The mounting base 41 is provided with a first rotating shaft 12, the return spring 44 is sleeved on the first rotating shaft 12, two ends of the check connecting rod 42 are respectively a rotating end and a working end, wherein the rotating end of the check connecting rod 42 is hinged to the first rotating shaft 12 and presses the return spring 44 tightly, so that the return spring 44 is in a compressed state;

the connecting piece 421 protruding outwards is arranged on the open-stopping connecting rod 42, one end of the fuse link 43 is connected to the mounting seat 41, the other end of the fuse link 43 is fixed to the connecting piece 421, before the fuse link 43 is not fused, the open-stopping connecting rod 42 is mechanically limited through the fuse link 43 to limit the rotation of the open-stopping connecting rod 42, in case of fire, the fuse link 43 is fused at high temperature, the fuse link 43 loses the limiting effect on the open-stopping connecting rod 42, at the moment, under the action of the return spring 44, the open-stopping connecting rod 42 rotates around the first rotating shaft 12 until the working end of the open-stopping connecting rod abuts against the valve plate 3, specifically, the central position of the valve plate 3.

Preferably, a thrust surface structure 422 is provided at the working end of the open-stop link 42, and when the open-stop link 42 is in a fire-proof state, the thrust surface structure 422 and the valve sheet 3 form surface-to-surface contact to limit the opening of the valve sheet 3.

Further, under a normal state, the opening stopping connecting rod 42 is vertically arranged or inclined towards the opening direction of the valve plate 3, and the working end of the opening stopping connecting rod 42 does not interfere with the valve plate 3 in the opening and closing process of the valve plate 3.

In the utility model, the opening stopping mechanism 4 can also be provided with a locking sheet 45 and a locking spring 46;

a second rotating shaft 13 is arranged on the mounting seat 41, and the locking spring 46 is sleeved on the second rotating shaft 13, wherein the second rotating shaft 13 is positioned between the valve shaft 11 and the first rotating shaft 12, and the first rotating shaft 12 and the second rotating shaft 13 are mutually flush; one end of the locking sheet 45 is hinged to the second rotating shaft 13 and presses the locking spring 46 tightly, the other end of the locking sheet 45 is provided with a barb 47, and the barb 47 is buckled and pressed on one side edge of the opening stopping connecting rod 42 far away from the valve plate 3;

specifically, the locking piece 45 is configured to be limited by the open-stop link 42 and asynchronously rotate along with the rotation of the open-stop link 42.

Further, the hinged end of the open-stopping connecting rod 42 is provided with an arc-shaped matching portion 423, the barb 47 is always in contact with the arc-shaped matching portion 423, a man-shaped anti-falling structure is formed between the locking sheet 45 and the arc-shaped matching portion 423, and correspondingly, anti-sliding teeth 424 can be further arranged on the arc-shaped matching portion.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. Any person skilled in the art can make some modifications without departing from the scope of the invention, i.e. all equivalent modifications made according to the invention are intended to be covered by the scope of the invention.

Claims

1. A fire resistant check valve, comprising:

a valve body;

the valve seat is fixed in the valve body, and an exhaust port is arranged on the valve seat;

the valve plate is arranged on the valve body in an openable and closable manner and can cover the exhaust port; and

an opening stopping mechanism;

the opening stopping mechanism comprises a mounting seat, an opening stopping connecting rod, a fuse link and a return spring, wherein the mounting seat is detachably arranged on the valve body and is positioned below one side, far away from the valve seat, of the valve plate; the mounting seat is provided with a first rotating shaft, the return spring is sleeved on the first rotating shaft, and the rotating end of the opening stopping connecting rod is hinged to the first rotating shaft and tightly presses the return spring; one end of the fuse link is fixed on the mounting seat, and the other end of the fuse link is connected to the opening stopping connecting rod to limit the opening stopping connecting rod to rotate around the first rotating shaft.

2. The fire protection check valve of claim 1, wherein the open-stop link is provided with an outwardly protruding connecting piece, and the fuse link is fixedly connected to the connecting piece.

3. The fire prevention check valve of claim 1, wherein the working end of the open-stop link is configured not to interfere with the valve plate during opening and closing of the valve plate.

4. The fire prevention check valve of claim 1, wherein the working end of the open-stop link abuts against the outer center of the valve plate under the driving of the return spring after the fuse link is fused.

5. The fire protection check valve of claim 4, wherein a thrust surface structure is provided at the working end of the check link to engage the valve plate.

6. The fire protection check valve of claim 1, wherein the mounting block is further provided with a valve shaft, and the valve plate is rotatably connected to the valve shaft through a support plate.

7. The fire resistant check valve of claim 6 wherein said opening stop mechanism is further provided with a locking tab;

a second rotating shaft and a locking spring sleeved on the second rotating shaft are arranged on the mounting seat, and the second rotating shaft is positioned between the valve shaft and the first rotating shaft;

one end of the locking sheet is hinged to the second rotating shaft and is arranged to compress the locking spring, the other end of the locking sheet is provided with a barb, and the barb is buckled and pressed on one side edge of the opening stopping connecting rod, which is far away from the valve plate;

wherein the locking piece is arranged to be limited by the open-stopping connecting rod or the fuse link.

8. The fire protection check valve of claim 7, wherein the hinged end of the check link has an arc-shaped engagement portion, the locking tab is configured to be retained by the check link, and the locking tab rotates synchronously or asynchronously with the check link after the fuse link is fused; the barb is connected with the arc-shaped matching part in a matched mode, and a humanoid anti-falling structure is formed between the locking sheet and the opening stopping connecting rod.

9. The fire resistant check valve of claim 8, wherein said arcuate mating portion is provided with anti-slip teeth.

10. The fire resistant check valve of claim 7 wherein said first axis of rotation and said second axis of rotation are substantially flush with each other in height.