Adjustable check fireproof valve

Abstract

The utility model relates to an adjustable check fireproof valve which comprises a valve body, a baffle is fixed in the valve body, a hinge block is fixed on the inner top wall of the valve body, a hinge rod is rotatably connected in the hinge block, a reset spring is fixed on the outer surface of the hinge rod, and a closing plate is fixed on the outer surface of the hinge rod. A fireproof assembly is arranged in the valve body, the right side of the valve body is in threaded connection with a mounting plate, a control rod is inserted into the right side of the mounting plate, and an adjusting assembly is fixed to the outer surface of the valve body. According to the adjustable non-return fireproof valve, when a fire disaster occurs, the baffle is shielded by the closing plate under the support of the reset spring, so that primary fire prevention is conducted, when the temperature rises, the elastic bearing capacity of a spring material is reduced, and therefore the fireproof assembly is pushed to close the baffle under the pushing of flames and gas; the overall structure is simple, and the overall fireproof performance is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of non-return fire dampers, in particular to an adjustable non-return fire damper. Background Art

[0002] At present, the exhaust ducts of household kitchens are connected to the main exhaust ducts of the building. In order to prevent the oil smoke in the main exhaust duct from flowing back into the kitchen, ventilation check valves are installed between the main exhaust duct and the residents' kitchen exhaust duct. If a fire occurs, the check valve can also play a certain fire prevention role.

[0003] For example, the utility model patent with publication number CN213512240U discloses an adjustable non-return fire damper, which belongs to the field of fire dampers and includes a valve body, a sealing ring is symmetrically fixedly installed on the inner wall of the valve body, a partition is fixedly installed on the inner wall of the valve body, a flow hole is provided on the surface of the partition, a fixed seat is symmetrically fixedly installed on the surface of the partition, a rotating rod is rotatably installed on the inner wall of the fixed seat, a connecting plate is fixedly installed on the surface of the rotating rod, a baffle is fixedly installed on the surface of the connecting plate, and a heat-conducting ring is symmetrically fixedly installed on the surface of the valve body. Through the arrangement of structures such as torsion springs, rotating rods, and baffles, the sealing disk can seal the flow hole. When the smoke flows forward, the sealing disk can be pushed away from the flow hole for the circulation of the smoke. When the smoke flows back in reverse, the flow hole can be sealed under the action of the baffle to prevent smoke backflow. Through the action of the heat-conducting ring, the heat-conducting member, and the heat dissipating member, the heat of the inner wall of the valve body can be quickly conducted and volatilized, thereby extending the service life of the valve body.

[0004] However, there are still some problems. Although it can prevent external flames from entering the interior, when a fire occurs inside, the fireproof sheet that has been corroded for a long time is easily pushed, thereby damaging the external exhaust duct, thereby reducing the use effect of the device. There are certain hidden dangers and it is not conducive to use. Therefore, an adjustable non-return fire damper is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an adjustable non-return fire damper having the advantages of good fire resistance and the like, and solves the problem that the fireproof sheet is easily corroded, thereby causing damage to the external exhaust duct.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable non-return fire damper, comprising a valve body, a baffle is fixed inside the valve body, a hinge block is fixed on the inner top wall of the valve body, a hinge rod that penetrates the outside of the hinge block is rotatably connected inside the hinge block, a return spring fixed to the hinge block is fixed on the outer surface of the hinge rod, a closing plate is fixed on the outer surface of the hinge rod, a fireproof component is arranged inside the valve body, and the fireproof component is used to prevent the spread of flames;

[0007] The right side of the valve body is threadedly connected with a mounting plate, the right side of the mounting plate is plugged with two control rods, and the outer surface of the valve body is fixed with two adjustment components, which are used to adjust the overall size of the check fire damper;

[0008] The fireproof assembly includes a fireproof plate and a connecting ring which are slidably connected to the valve body. A connecting plate is fixed between the upper and lower side walls of the inner cavity of the connecting ring. A mounting block is fixed on the side of the connecting plate opposite to the fireproof plate. A supporting spring is fixed between the two mounting blocks.

[0009] Furthermore, a threaded strip is fixed on the outer surface of the mounting plate, and a threaded groove matching the threaded strip is formed on the right side of the valve body.

[0010] Furthermore, an insert block is fixed on the left side of the control rod, and a slot adapted to the insert block is provided on the right side of the mounting plate.

[0011] Furthermore, the regulating assembly includes an extension block fixed to the valve body, the extension block is internally slidably connected to an extension plate, the extension block is internally slidably connected to an extension rod penetrating the extension plate, and the outer surface of the extension rod is threadedly connected to a fixed block.

[0012] Furthermore, the portion where the extension rod is slidably connected to the extension block is square, and the portion where the extension rod is threadedly connected to the fixed block is round.

[0013] Furthermore, a sealing plate is fixed on the left side of the fireproof plate, and a sealing groove matched with the sealing plate is opened on the right side of the baffle.

[0014] Furthermore, sliding blocks are fixed on both the upper and lower sides of the fireproof plate, and a sliding groove slidably connected to the sliding block is provided inside the valve body.

[0015] Furthermore, a compression pad is fixed on one side of the fixing block facing the extension block, and a sponge pad is sleeved on the outer surface of the control rod.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0017] When a fire occurs, the adjustable non-return fire damper will cause the closing plate to cover the baffle with the support of the return spring, thereby providing preliminary fire protection. When the temperature rises, the elastic bearing capacity of the spring material will decrease, so that the fire protection component will be pushed to close the baffle under the impetus of flame and gas. The overall structure is simple, which effectively improves the overall fire protection, making the overall structure more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the fireproof component of the utility model;

[0020] Figure 3 This is a three-dimensional diagram of the fireproof board structure of the utility model.

[0021] In the figure: 1 valve body, 2 baffle, 3 hinge block, 4 hinge rod, 5 return spring, 6 closing plate, 7 fire protection assembly, 701 fire protection plate, 702 connecting ring, 703 connecting plate, 704 mounting block, 705 support spring, 8 mounting plate, 9 control rod, 10 extension block, 11 extension plate, 12 extension rod, 13 fixing block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 In this embodiment, an adjustable check fire damper includes a valve body 1, a baffle 2 is fixed inside the valve body 1, a hinge block 3 is fixed to the inner top wall of the valve body 1, the hinge block 3 is internally rotatably connected to a hinge rod 4 that penetrates to the outside of the hinge block 3, a reset spring 5 fixed to the outer surface of the hinge rod 4 is fixed to the hinge block 3, and the reset spring 5 can reset the hinge rod 4 after rotation, and a closing plate 6 is fixed to the outer surface of the hinge rod 4, and the closing plate 6 is used to close the baffle 2, and a fire prevention component 7 is arranged inside the valve body 1, and the fire prevention component 7 is used to prevent the spread of flames.

[0024] In addition, a mounting plate 8 is threadedly connected to the right side of the valve body 1, a threaded strip is fixed on the outer surface of the mounting plate 8, a threaded groove matching the threaded strip is opened on the right side of the valve body 1, and the mounting plate 8 is provided to push the fire protection component 7, thereby realizing the fixation of the fire protection component 7, and two control rods 9 are plugged into the right side of the mounting plate 8, a sponge pad is covered on the outer surface of the control rod 9, an insert block is fixed on the left side of the control rod 9, and a slot matching the insert block is opened on the right side of the mounting plate 8, through the plug-in connection, after the mounting plate 8 is installed, the control rod 9 can be disassembled and installed when needed.

[0025] Furthermore, two adjusting components are fixed to the outer surface of the valve body 1, and the adjusting components are used to adjust the overall size of the check fire damper. The adjusting components include an extension block 10 fixed to the valve body 1, and the extension block 10 is internally slidably connected to an extension plate 11. By moving the extension plate 11, the overall length of the extension block 10 and the extension plate 11 can be increased. The extension block 10 is internally slidably connected to an extension rod 12 that penetrates the extension plate 11. The portion where the extension rod 12 is slidably connected to the extension block 10 is square. Setting it to a square shape can make the movement of the extension rod 12 more stable. The portion where the extension rod 12 is threadedly connected to the fixed block 13 is circular. The outer surface of the extension rod 12 is threadedly connected to the fixed block 13, and a compression pad is fixed to the side of the fixed block 13 facing the extension block 10. By rotating the fixed block 13, the friction between the extension rod 12 and the extension block 10 can be increased, thereby achieving the adjusted fixation.

[0026] In general, the length can be adjusted by pulling the extension plate 11, so that it can be used in environments of different sizes. After the adjustment is completed, the friction between the extension rod 12 and the extension block 10 can be increased by rotating the fixing block 13, thereby achieving the adjusted fixation. The overall structure is simple, making the overall structure more practical.

[0027] See also Figure 2-3 In order to improve the overall fireproofing, the fireproofing assembly 7 in this embodiment includes a fireproofing plate 701 and a connecting ring 702 which are slidably connected to the valve body 1. A sealing plate is fixed on the left side of the fireproofing plate 701, and a sealing groove which is compatible with the sealing plate is provided on the right side of the baffle 2. The sealing plate can effectively improve the sealing between the baffle 2 and the fireproofing plate 701, thereby making the whole more stable. Sliding blocks are fixed on the upper and lower sides of the fireproofing plate 701, and a sliding groove which is slidably connected to the slider is provided inside the valve body 1. A connecting plate 703 is fixed between the upper and lower side walls of the inner cavity of the connecting ring 702. A mounting block 704 is fixed on the side of the connecting plate 703 opposite to the fireproofing plate 701, and a supporting spring 705 is fixed between the two mounting blocks 704. The elastic modulus, stiffness and bearing capacity of the supporting spring 705 are reduced under high temperature environment.

[0028] In general, the support spring 705 will reduce its bearing capacity under the high temperature of the flame, making it impossible to continue to pull the fireproof board 701. Under the impact of flame and gas, the fireproof board 701 will shield the baffle 2, thereby effectively improving the overall fire resistance and making the whole more practical.

[0029] The working principle of the above embodiment is:

[0030] When a fire occurs inside, with the support of the reset spring 5, the closing plate 6 will initially block the baffle 2, and under the influence of temperature, the elastic effect of the support spring 705 will be reduced, so that under the push of flame and gas, the fireproof plate 701 will move to the left to further shield the baffle 2. When a fire occurs outside, the movement direction of the flame and gas is from left to right, which can push the closing plate 6 to shield the baffle 2 more stably. At this time, there is no need for the fireproof component 7. After the fire prevention is completed, when the deformed support spring 705 needs to be replaced, the connecting ring 702 and the connecting plate 703 can be unfixed by rotating the mounting plate 8. At this time, the connecting ring 702 can be moved to the outside of the valve body 1, and the support spring 705 can be replaced. The overall structure is simple, which effectively improves the overall fire resistance, making the overall structure more practical.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. An adjustable non-return fire damper, comprising a valve body (1), characterized in that: A baffle (2) is fixed inside the valve body (1), a hinge block (3) is fixed to the inner top wall of the valve body (1), a hinge rod (4) is rotatably connected inside the hinge block (3) and extends to the outside of the hinge block (3), a return spring (5) fixed to the hinge block (3) is fixed on the outer surface of the hinge rod (4), a closing plate (6) is fixed on the outer surface of the hinge rod (4), and a fireproof component (7) is arranged inside the valve body (1), and the fireproof component (7) is used to prevent the spread of flames; The right side of the valve body (1) is threadedly connected to a mounting plate (8), the right side of the mounting plate (8) is plugged with two control rods (9), and the outer surface of the valve body (1) is fixed with two adjustment components, the adjustment components being used to adjust the overall size of the non-return fire damper; The fireproof assembly (7) comprises a fireproof plate (701) and a connecting ring (702) which are slidably connected to the valve body (1); a connecting plate (703) is fixed between the upper and lower side walls of the inner cavity of the connecting ring (702); a mounting block (704) is fixed on the side of the connecting plate (703) opposite to the fireproof plate (701); and a supporting spring (705) is fixed between the two mounting blocks (704).

2. The adjustable check fire damper according to claim 1, characterized in that: A threaded strip is fixed to the outer surface of the mounting plate (8), and a threaded groove matching the threaded strip is provided on the right side of the valve body (1).

3. The adjustable check fire damper according to claim 1, characterized in that: An insert block is fixed on the left side of the control rod (9), and a slot matching the insert block is provided on the right side of the mounting plate (8).

4. The adjustable check fire damper according to claim 1, characterized in that: The regulating assembly comprises an extension block (10) fixed to the valve body (1), the extension block (10) being internally slidably connected to an extension plate (11), the extension block (10) being internally slidably connected to an extension rod (12) penetrating the extension plate (11), and the outer surface of the extension rod (12) being threadedly connected to a fixing block (13).

5. The adjustable check fire damper according to claim 4, characterized in that: The portion where the extension rod (12) and the extension block (10) are slidably connected is square, and the portion where the extension rod (12) and the fixed block (13) are threadedly connected is circular.

6. The adjustable check fire damper according to claim 1, characterized in that: A sealing plate is fixed on the left side of the fireproof plate (701), and a sealing groove matching the sealing plate is provided on the right side of the baffle plate (2).

7. The adjustable check fire damper according to claim 1, characterized in that: Sliding blocks are fixed on both the upper and lower sides of the fireproof plate (701), and a sliding groove slidably connected to the sliding block is provided inside the valve body (1).

8. The adjustable check fire damper according to claim 4, characterized in that: A compression pad is fixed to the side of the fixed block (13) facing the extension block (10), and a sponge pad is sleeved on the outer surface of the control rod (9).

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