Fire damper

Abstract

The present invention relates to a fire damper, which solves the problem that a smoke-proof valve plate cannot close a smoke-proof port. The fire damper comprises a valve body, a smoke-proof valve plate and a locking structure, wherein the valve body is provided with a smoke-proof port, the smoke-proof valve plate is movably arranged on the valve body, the smoke-proof valve plate has a locking position and an unlocking position, when the smoke-proof valve plate is in the locking position, the smoke-proof valve plate is fixedly connected to the valve body through the locking structure to normally open the smoke-proof port, when the smoke-proof valve plate is in the unlocking position, the smoke-proof valve plate closes the smoke-proof port, and is characterized in that a stop-retraction structure is provided on the valve body, after the smoke-proof valve plate moves in the exhaust direction and closes the smoke-proof port, the stop-retraction structure prevents the smoke-proof valve plate from moving in a direction away from the smoke-proof port beyond a predetermined distance.

Description

Technical Field

[0001] The invention relates to a fire damper. Background Art

[0002] The valve includes a valve body, a smoke-proof valve plate, a torsion spring and a connecting rod. The valve body is provided with an exhaust duct, and the exhaust duct is provided with a smoke-proof port. The upper end of the connecting rod is rotatably connected to the smoke-proof valve plate, and the lower end of the connecting rod is rotatably connected to the valve body. The torsion spring drives the connecting rod to rotate relative to the valve body, so that the connecting rod drives the smoke-proof valve plate to close the smoke-proof port.

[0003] The existing torsion spring will lose its elasticity when it is in a high temperature environment for a long time. Under the blowing of indoor and / or outdoor smoke, the smoke isolation valve sheet will not be able to close the smoke isolation port. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a fire damper, which solves the problem that the smoke isolation damper sheet cannot close the smoke isolation port.

[0005] To solve the above problems, the present invention provides the following technical solutions:

[0006] The fire damper includes a valve body, a smoke-tightening valve plate and a locking structure. The valve body is provided with a smoke-tightening port. The smoke-tightening valve plate is movably arranged on the valve body. The smoke-tightening valve plate has a locking position and an unlocking position. When the smoke-tightening valve plate is in the locking position, the smoke-tightening valve plate is fixedly connected to the valve body through the locking structure to normally open the smoke-tightening port. When the smoke-tightening valve plate is in the unlocking position, the smoke-tightening valve plate closes the smoke-tightening port. A stop structure is provided on the valve body. The installation height of the stop structure on the valve body is different from the installation height of the locking structure on the valve body. After the smoke-tightening valve plate moves in the exhaust direction and closes the smoke-tightening port, the stop structure prevents the smoke-tightening valve plate from moving more than a predetermined distance in the direction away from the smoke-tightening port.

[0007] In the present invention, a stop structure is provided on the valve body, which is used to prevent the smoke isolation valve plate from moving more than a predetermined distance away from the smoke isolation port. This structure can effectively prevent the smoke isolation valve plate from losing its smoke isolation function in the event of a fire indoors and / or outdoors.

[0008] In addition, in the present invention, the smoke-isolating valve piece moves in the exhaust direction to close the exhaust port, which means that in the case of a fire indoors, the smoke indoors can only push the smoke-isolating valve piece to close the exhaust port. With such a design, the valve can effectively prevent indoor smoke from spreading to the outdoors.

[0009] In the present invention, the anti-retraction structure can effectively prevent the smoke isolation valve plate from automatically opening the smoke isolation port in a high temperature environment. The anti-retraction structure is especially used to prevent the smoke isolation valve plate from automatically opening the smoke isolation port when the torsion spring fails.

[0010] In the present invention, the stop structure and the locking structure are separately arranged, and different functions of the smoke damper are realized through different structures. With such a design, the manufacturing precision requirement of a single structure on the fire damper (especially compared with the existing locking structure) will be greatly reduced.

[0011] In the present invention, the installation height of the stop structure on the valve body is different from the installation height of the locking structure on the valve body, and this structure prevents the smoke isolation valve plate from being parallel to the horizontal plane when closing the smoke isolation port. Such a design effectively reduces the height dimension required for the valve body.

[0012] Furthermore, the stop structure is located above the locking structure.

[0013] In the present invention, the stop structure is located above the locking structure, and this structure requires the smoke isolation valve plate to close the smoke isolation port from bottom to top. This design prevents the smoke isolation valve plate from interfering with the exhaust valve plate during movement.

[0014] Furthermore, the smoke isolation port is arranged at an angle, and the smoke isolation valve plate is located in the valve body. Such a design leaves space for the movement of the smoke isolation valve plate.

[0015] Furthermore, the stop structure is provided with at least one stop block arranged on the inner wall of the valve body, and the stop block is provided with a stop surface for preventing the smoke isolation valve plate from moving away from the smoke isolation port. When the stop block is provided with a stop surface, the stop surface can effectively increase the contact area between the stop block and the smoke isolation valve plate, so as to reduce the probability of valve failure.

[0016] Furthermore, the valve body includes an annular sleeve and an annular baffle extending inwardly from the annular sleeve, and when the smoke isolation valve plate closes the smoke isolation port, the smoke isolation valve plate is located between the anti-retraction surface and the annular baffle. The gap between the anti-retraction surface and the annular baffle is the movement range of the smoke isolation valve plate. By limiting the movement range of the smoke isolation valve plate, the difficulty of the smoke isolation valve plate to deform can be effectively increased. In other words, by limiting the movement range of the smoke isolation valve plate, the difficulty of the smoke isolation valve plate to deform and pass through the anti-retraction block can be increased.

[0017] Furthermore, when the smoke-isolating valve piece closes the smoke-isolating port, the smoke-isolating valve piece is clamped between the anti-retraction surface and the annular baffle plate; or, the length of the smoke-isolating valve piece between the anti-retraction surface and the annular baffle plate is greater than the spacing distance between the anti-retraction surface and the annular baffle plate. This design avoids failure of the anti-retraction block.

[0018] Further, the smoke-isolating valve plate comprises an arc-shaped portion and a straight portion extending outward from the arc-shaped portion, and when the smoke-isolating valve plate closes the smoke-isolating port, at least part of the straight portion is located between the anti-recoil surface and the annular baffle plate. This structure can shorten the gap between the anti-recoil surface and the annular baffle plate, thereby reducing the movable range of the straight portion between the anti-recoil surface and the annular baffle plate; or, the smoke-isolating valve plate comprises an arc-shaped portion and a straight portion extending outward from the arc-shaped portion, and when the smoke-isolating valve plate closes the smoke-isolating port, the straight portion and at least part of the arc-shaped portion is located between the anti-retreat surface and the annular baffle plate. This structure can shorten the spacing distance between the smoke isolation valve plate and the anti-retreat surface when the smoke isolation port is closed; or, the smoke isolation valve plate includes an arc-shaped portion, and when the smoke isolation valve plate closes the smoke isolation port, at least part of the arc-shaped portion is located between the anti-retreat surface and the annular baffle plate; or, the smoke isolation valve plate includes a straight portion, and when the smoke isolation valve plate closes the smoke isolation port, at least part of the straight portion is located between the anti-retreat surface and the annular baffle plate.

[0019] Furthermore, the stop block is provided with a guide surface, and an angle is formed between the guide surface and the stop surface, and after the smoke isolation valve plate slides along the guide surface, at least a part of the smoke isolation valve plate is opposite to the stop surface. The guide surface is used to reduce the difficulty of the smoke isolation valve plate passing through the stop block.

[0020] Furthermore, the minimum spacing distance between the guide surface and the stop surface is greater than 1 mm. This design prevents the stop block from losing its stop function after deformation.

[0021] Furthermore, the stop surface and the smoke isolation port are staggered, and the maximum spacing distance between the guide surface and the stop surface is greater than 3mm. For thicker smoke isolation valve plates, the contact area between the stop surface and the smoke isolation valve plate is reduced to prevent the smoke isolation valve plate from being unable to pass through the stop block; at the same time, it is necessary to control the maximum spacing distance between the guide surface and the stop surface to prevent the stop block from elastic deformation. Or, at least part of the stop surface corresponds to the smoke isolation port, 1mm < the maximum spacing distance between the guide surface and the stop surface < 5mm. For thinner smoke isolation valve plates, the contact area between the stop surface and the smoke isolation valve plate is increased to prevent the smoke isolation valve plate from separating from the stop surface after deformation; at the same time, it is necessary to control the maximum spacing distance between the guide surface and the stop surface to allow the stop block to have a suitable elastic force.

[0022] Furthermore, the valve further comprises an elastic element, and when the smoke isolation valve plate moves from a locked position to an unlocked position, the elastic element drives the smoke isolation valve plate to close the smoke isolation port. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional diagram of a fire damper in a preferred embodiment of the present invention;

[0024] Figure 2 is a front view of a fire damper in a preferred embodiment of the present invention;

[0025] Figure 3 yes Figure 2 Cross-sectional view at AA in the middle (when the smoke isolation valve piece closes the smoke isolation port);

[0026] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0027] Figure 5 yes Figure 2 Cross-sectional view at AA in the middle (when the smoke isolation valve opens the smoke isolation port). DETAILED DESCRIPTION

[0028] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0029] See also Figure 2 and Figure 3 The fire damper includes a valve body 1, a smoke-isolating valve plate 3 and a locking structure 4. A smoke-isolating port 112 is provided on the valve body 1. The smoke-isolating valve plate 3 is movably arranged on the valve body 1. The smoke-isolating valve plate 3 has a locking position and an unlocking position. When the smoke-isolating valve plate 3 is in the locking position, the smoke-isolating valve plate 3 is fixedly connected to the valve body 1 through the locking structure 4 to normally open the smoke-isolating port 112. When the smoke-isolating valve plate 3 is in the unlocking position, the smoke-isolating valve plate 3 closes the smoke-isolating port 112.

[0030] See also Figure 5 , the smoke isolation port 112 is tilted, and the smoke isolation valve plate 3 is located in the valve body 1. In other embodiments of the present invention, the smoke isolation valve plate can also be located outside the valve body.

[0031] It should be noted that: this embodiment does not involve improvements to the locking structure 4, therefore, this embodiment only lists three preferred structures of the locking structure 4, the first structure of the locking structure 4 includes a first metal sheet, a second metal sheet and a solder for connecting the first metal sheet and the second metal sheet, the first metal sheet is arranged on the inner wall of the valve body 1, and the second metal sheet abuts against the smoke isolation valve sheet 3 when the smoke isolation valve sheet 3 is in the locking position to prevent the smoke isolation valve sheet 3 from moving toward the smoke isolation port 112. When the fire check valve is in a high temperature environment, the solder melts and separates the first metal sheet from the second metal sheet (in other words, the locking structure 4 stops working); after the first metal sheet is separated from the second metal sheet, the second metal sheet cannot play a role in blocking the movement of the smoke isolation valve sheet 3, therefore, the smoke isolation valve sheet 3 moves toward the smoke isolation port 112 driven by its own gravity or driven by an external force. The second structure of the locking structure 4 includes a memory metal, one end of which is arranged on the inner wall of the valve body 1, and the other end of which abuts against the smoke isolation valve plate 3 when the smoke isolation valve plate 3 is in the locking position, so as to prevent the smoke isolation valve plate 3 from moving toward the smoke isolation port 112; when the fire check valve is in a high temperature environment, the memory metal moves and separates from the smoke isolation valve plate 3 (in other words, the locking structure 4 stops working), and after the memory metal moves and separates from the smoke isolation valve plate 3, the smoke isolation valve plate 3 moves toward the smoke isolation port 112 driven by its own gravity or by an external force. The third structure of the locking structure 4 includes a solder and a metal plate, the metal plate is arranged on the inner wall of the valve body 1 by the solder, and the metal plate abuts against the smoke isolation valve plate 3 when the smoke isolation valve plate 3 is in the locking position, so as to prevent the smoke isolation valve plate 3 from moving toward the smoke isolation port 112. When the fire check valve is in a high temperature environment, the solder melts and separates from the metal plate (in other words, the locking structure 4 stops working); after the solder separates from the metal plate, the metal plate cannot block the movement of the smoke valve plate 3, and therefore, the smoke valve plate 3 moves toward the smoke isolation port 112 driven by its own gravity or by an external force.

[0032] See also Figure 3 and Figure 4 In this embodiment, a stop structure 5 is provided on the valve body 1. The installation height of the stop structure 5 on the valve body 1 is different from the installation height of the locking structure 4 on the valve body 1. After the smoke isolation valve plate 3 moves along the exhaust direction and closes the smoke isolation port 112, the stop structure 5 prevents the smoke isolation valve plate 3 from moving more than a predetermined distance away from the smoke isolation port 112.

[0033] See also Figure 4The anti-retreat structure is provided with at least one anti-retreat block 5 arranged on the inner wall of the valve body 1, and the anti-retreat block 5 is provided with an anti-retreat surface 51 for preventing the smoke isolation valve plate 3 from moving away from the smoke isolation port 112. The valve body 1 comprises an annular sleeve 101 and an annular baffle 102 extending inwardly from the annular sleeve 101. When the smoke isolation valve plate 3 closes the smoke isolation port 112, the smoke isolation valve plate 3 is located between the anti-retreat surface 51 and the annular baffle 102. Specifically: when the smoke isolation valve plate 3 closes the smoke isolation port 112, the smoke isolation valve plate 3 is clamped between the anti-retreat surface 51 and the annular baffle 102. When the smoke isolation valve plate 3 is clamped between the anti-retreat surface 51 and the annular baffle 102, the value of the predetermined distance is 0. In other embodiments of the present invention, the length of the smoke-proof valve plate between the stop surface and the annular baffle plate is greater than the spacing distance between the stop surface and the annular baffle plate. When the length of the smoke-proof valve plate between the stop surface and the annular baffle plate is greater than the spacing distance between the stop surface and the annular baffle plate, 0≤predetermined distance<the spacing distance between the stop surface and the annular baffle plate.

[0034] In the present embodiment, the smoke-isolating valve plate 3 includes an arc-shaped portion and a straight portion extending outward from the arc-shaped portion, and when the smoke-isolating valve plate 3 closes the smoke-isolating port 112, at least part of the straight portion is located between the stop-retreat surface 51 and the annular baffle 102; or, the smoke-isolating valve plate 3 includes an arc-shaped portion and a straight portion extending outward from the arc-shaped portion, and when the smoke-isolating valve plate 3 closes the smoke-isolating port 112, the straight portion and at least part of the arc-shaped portion are located between the stop-retreat surface 51 and the annular baffle 102; or, the smoke-isolating valve plate 3 includes an arc-shaped portion, and when the smoke-isolating valve plate 3 closes the smoke-isolating port 112, at least part of the arc-shaped portion is located between the stop-retreat surface 51 and the annular baffle 102; or, the smoke-isolating valve plate 3 includes a straight portion, and when the smoke-isolating valve plate 3 closes the smoke-isolating port 112, at least part of the straight portion is located between the stop-retreat surface 51 and the annular baffle 102.

[0035] See also Figure 4 The stop block 5 is also provided with a guide surface 52 , and an angle a is formed between the guide surface 52 and the stop surface 51 . After the smoke isolation valve plate 3 slides along the guide surface 52 , at least part of the smoke isolation valve plate 3 is opposite to the stop surface 51 .

[0036] like Figure 4 As shown, the maximum spacing distance between the guide surface 52 and the stop surface 51 is H2, and the minimum spacing distance between the guide surface 52 and the stop surface 51 is H1, H1>1mm, preferably, the stop surface 51 and the smoke isolation port 112 are offset, H2>3mm; or, at least part of the stop surface 51 corresponds to the smoke isolation port 112, 1mm<H2<5mm.

[0037] In this embodiment, the smoke-isolating valve plate 3 can be rotatably connected to the valve body 1. In other embodiments of the present invention, the smoke-isolating valve plate is rotatably connected to the upper end of the second connecting rod, and the lower end of the second connecting rod is rotatably connected to the valve body; or, the smoke-isolating valve plate is fixedly connected to the upper end of the second connecting rod, and the lower end of the second connecting rod is fixedly connected to the valve body.

[0038] In this embodiment, the fire damper also includes an elastic element. When the smoke valve plate 3 moves from a locked position to an unlocked position, the elastic element drives the smoke valve plate 3 to close the smoke isolation port 112. Specifically, the elastic element is a torsion spring. The smoke valve plate 3 is rotatably connected to the valve body 1 via a rotating shaft. The torsion spring is sleeved on the rotating shaft. One torsion arm of the torsion spring is arranged on the valve body 1, and the other torsion arm of the torsion spring is arranged on the smoke valve plate 3.

[0039] In this embodiment, the retaining structure 5 is preferably located above the locking structure 4 .

[0040] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A fire damper, comprising a valve body, a smoke-isolating valve plate and a locking structure, wherein the valve body is provided with a smoke-isolating port, the smoke-isolating valve plate is movably arranged on the valve body, the smoke-isolating valve plate has a locking position and an unlocking position, when the smoke-isolating valve plate is in the locking position, the smoke-isolating valve plate is fixedly connected to the valve body through the locking structure to normally open the smoke-isolating port, when the smoke-isolating valve plate is in the unlocking position, the smoke-isolating valve plate closes the smoke-isolating port, characterized in that: The valve body is provided with a stop structure, the installation height of the stop structure on the valve body is different from the installation height of the locking structure on the valve body, and after the smoke isolation valve plate moves in the exhaust direction and closes the smoke isolation port, the stop structure prevents the smoke isolation valve plate from moving away from the smoke isolation port by more than a predetermined distance; The stop structure is provided with at least one stop block arranged on the inner wall of the valve body, and the stop block is provided with a stop surface for preventing the smoke isolation valve plate from moving in a direction away from the smoke isolation port; The stop block is also provided with a guide surface, and an angle is formed between the guide surface and the stop surface, and after the smoke isolation valve sheet slides along the guide surface, at least a part of the smoke isolation valve sheet is opposite to the stop surface; The fire damper further comprises an elastic element, and when the smoke isolation valve plate moves from a locked position to an unlocked position, the elastic element drives the smoke isolation valve plate to close the smoke isolation port.

2. The fire damper according to claim 1, characterized in that: The smoke isolation port is arranged obliquely, and the smoke isolation valve sheet is located in the valve body.

3. The fire damper according to claim 1, characterized in that: The valve body comprises an annular sleeve and an annular baffle extending inwardly from the annular sleeve. When the smoke isolation valve plate closes the smoke isolation port, the smoke isolation valve plate is located between the stop surface and the annular baffle.

4. The fire damper according to claim 3, characterized in that: When the smoke isolation valve plate closes the smoke isolation port, the smoke isolation valve plate is clamped between the stop-retreat surface and the annular baffle plate; or, the length of the smoke isolation valve plate between the stop-retreat surface and the annular baffle plate is greater than the spacing distance between the stop-retreat surface and the annular baffle plate.

5. The fire damper according to claim 3, characterized in that: The smoke-isolating valve plate includes an arc-shaped portion and a straight portion extending outward from the arc-shaped portion, and when the smoke-isolating valve plate closes the smoke-isolating port, at least part of the straight portion is located between the anti-retreat surface and the annular baffle plate; or, the smoke-isolating valve plate includes an arc-shaped portion and a straight portion extending outward from the arc-shaped portion, and when the smoke-isolating valve plate closes the smoke-isolating port, the straight portion and at least part of the arc-shaped portion are located between the anti-retreat surface and the annular baffle plate; or, the smoke-isolating valve plate includes an arc-shaped portion, and when the smoke-isolating valve plate closes the smoke-isolating port, at least part of the arc-shaped portion is located between the anti-retreat surface and the annular baffle plate; or, the smoke-isolating valve plate includes a straight portion, and when the smoke-isolating valve plate closes the smoke-isolating port, at least part of the straight portion is located between the anti-retreat surface and the annular baffle plate.

6. The fire damper according to claim 1, characterized in that: The minimum spacing distance between the guide surface and the stop surface is greater than 1 mm.

7. The fire damper according to claim 6, characterized in that: The stop surface is staggered with the smoke isolation port, and the maximum spacing distance between the guide surface and the stop surface is greater than 3mm; or, at least part of the stop surface corresponds to the smoke isolation port, and the maximum spacing distance between the guide surface and the stop surface is less than 1mm and less than 5mm.

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