Fire damper breather valve

Abstract

This utility model belongs to the field of breathing valve technology, and particularly relates to a flame-arresting breathing valve, including a valve body. Multiple guide rods are evenly installed in the circumferential direction of the valve body. An exhalation valve disc assembly is slidably connected in the middle of the multiple guide rods. The lower end of the exhalation valve disc assembly abuts against the valve body. An inhalation valve disc assembly is slidably connected in the middle of the exhalation valve disc assembly. An upper spring seat is installed on the inhalation valve disc assembly. A spring is provided between the exhalation valve disc assembly and the upper spring seat. The multiple guide rods guide the up and down movement of the exhalation valve disc assembly, making the exhalation valve disc assembly more stable when opening or closing, and eliminating concerns about the deformation or bending of the guide rods.

Description

Technical Field

[0001] This utility model belongs to the field of breathing valve technology, and in particular relates to a flame-arresting breathing valve. Background Technology

[0002] The existing flame arrestor breathing valves typically use a valve stem or guide rod to guide the exhalation valve disc assembly and the inhalation valve disc assembly. Under long-term opening and closing conditions, the single valve stem is prone to deformation and bending, causing the exhalation valve disc assembly to jam and become unable to open or close.

[0003] For example, patent application CN202323612056.6 describes a flame-retardant breather valve, including a valve body. A flame arrester connecting flange is fixedly connected to the top of the outer wall of the valve body, and a flame arrester is installed on the flame arrester connecting flange. A fixing plate is fixedly connected to the bottom wall of the valve body, and a guide cylinder is fixedly connected to the bottom wall of the fixing plate. A flange base is fixedly connected to the bottom wall of the guide cylinder. A support cylinder is fixedly connected to the upper wall of the fixing plate inside the valve body. An exhalation valve disc assembly is provided on the upper wall of the support cylinder, and an inhalation valve disc assembly is connected to the exhalation valve disc assembly. A support column is fixedly connected to the inner wall of the guide cylinder, and a valve stem passes through the middle of the support column. However, the disadvantage of this technical solution is that the exhalation valve disc assembly and the inhalation valve disc assembly are combined and guided by a single valve stem. Under long-term opening and closing conditions, the single valve stem is prone to deformation and bending, causing the exhalation valve disc assembly to jam and become unable to open or close. Utility Model Content

[0004] The purpose of this utility model is to provide a flame-arresting breather valve to solve the problems in the prior art. The specific technical solution is as follows:

[0005] A flame-arresting breathing valve includes a valve body, in which multiple guide rods are evenly installed in the circumferential direction. An exhalation valve disc assembly is slidably connected in the middle of the multiple guide rods. The lower end of the exhalation valve disc assembly abuts against the valve body. An inhalation valve disc assembly is slidably connected in the middle of the exhalation valve disc assembly. An upper spring seat is installed on the inhalation valve disc assembly. A spring is provided between the exhalation valve disc assembly and the upper spring seat.

[0006] Furthermore, the upper end of the valve body is provided with a flame arrestor grid assembly, the flame arrestor grid assembly is provided with an annular protective net, and a rain cover is provided on the outside of the flame arrestor grid assembly and the protective net, with the front end of the protective net abutting against the side wall of the rain cover.

[0007] Furthermore, the rain cover is equipped with multiple support rods, one end of which passes through the rain cover and the other end passes through the protective net and fire barrier assembly, and is threadedly fixed to the valve body.

[0008] Furthermore, the guide rod is threaded with two nuts, which abut against the upper and lower sides of the limiting block respectively. One end of the limiting block is sleeved on the guide rod, and the other end of the limiting block is located above the exhalation valve disc assembly.

[0009] Furthermore, a lubrication device is provided at the sliding connection between the inhalation valve disc assembly and the exhalation valve disc assembly.

[0010] Furthermore, a drain device is provided on the side of the valve body, and a plug is threadedly connected to the end of the drain device.

[0011] Furthermore, the exhalation valve disc assembly includes an exhalation valve disc, which is slidably connected between multiple guide rods. Multiple counterweights are stacked on the exhalation valve disc and fixed to the exhalation valve disc by fastening bolts. A spring is disposed between the exhalation valve disc and the upper spring seat.

[0012] Furthermore, the lower end of the exhalation valve disc is provided with a backflush edge, and a sealing element is provided between the exhalation valve disc and the backflush edge. The exhalation valve disc, the sealing element and the backflush edge are fixedly connected by a fastener, and the lower side of the sealing element abuts against the valve body.

[0013] Furthermore, the inhalation valve disc assembly includes an inhalation valve rod, a lubrication device is provided at the sliding connection between the inhalation valve rod and the exhalation valve disc, an upper spring seat is installed on the inhalation valve rod, an inhalation valve disc is sleeved on the inhalation valve rod, the inhalation valve disc is fixed to the lower end of the inhalation valve rod by a locking nut, a pressure plate and a second sealing element are provided between the locking nut and the inhalation valve disc, and the second sealing element abuts against the lower end of the exhalation valve disc.

[0014] Furthermore, the fire barrier assembly includes a bracket, which is fixed between the valve body and the protective net by a support rod, and the fire-arresting element and the pressure plate are fixed to the lower end of the bracket by fasteners in sequence.

[0015] The advantages of this utility model are:

[0016] 1. Multiple guide rods guide the exhalation valve disc assembly to move up and down, making the exhalation valve disc assembly more stable when opening or closing, and eliminating concerns about the guide rods deforming or bending.

[0017] 2. The upper limit block of the guide rod can be adjusted up and down, which makes it easy to accurately set the valve disc opening height and avoid the valve disc not being able to open fully if the opening height is too low, thus affecting the gas flow during exhaust.

[0018] 3. This application assembles the exhalation valve disc assembly and the inhalation valve disc assembly together, making its structure more compact, reducing production costs, and the overall breathing valve is small in size and easy to install. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the exhalation action of this utility model;

[0022] Figure 4 This is a schematic diagram of the inhalation action of this utility model;

[0023] Figure 5 This is a schematic diagram of the exhalation valve disc assembly of this utility model. Figure 1 ;

[0024] Figure 6 This is a schematic diagram of the exhalation valve disc assembly of this utility model. Figure 2 ;

[0025] Figure 7 This is a schematic diagram of the intake valve disc assembly of this utility model;

[0026] Figure 8 This is a schematic diagram of the fire-resistant grid assembly structure of this utility model;

[0027] Explanation of markings in the diagram:

[0028] Valve body 1; Inhalation valve disc assembly 2; Exhalation valve disc assembly 3; Guide rod 4; Nut 5; Limiting block 6; Flame arrestor grid assembly 7; Protective net 8; Rain cover 9; Support rod 10; Upper spring seat 11; Spring 12; Lubrication device 13; Drainage device 14; Plug 15; Fastener 1 16; Bracket 17; Flame arrestor element 18; Pressure plate 19; Counterweight 20; Fastener 2 21; Exhalation valve disc 22; Seal 1 23; Backflush edge 24; Inhalation valve rod 25; Locking nut 26; Tightening plate 27; Seal 2 28; Inhalation valve disc 29; Chamber 1 30; Chamber 2 31; Chamber 3 32. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] Example 1

[0032] like Figure 1-8 As shown, a flame arrestor breathing valve includes a valve body 1. Multiple guide rods 4 are evenly installed in the inner circumference of the valve body 1. An exhalation valve disc assembly 3 is slidably connected in the middle of the multiple guide rods 4. The lower end of the exhalation valve disc assembly 3 abuts against the valve body 1. An inhalation valve disc assembly 2 is slidably connected in the middle of the exhalation valve disc assembly 3. An upper spring seat 11 is installed on the inhalation valve disc assembly 2. A spring 12 is provided between the exhalation valve disc assembly 3 and the upper spring seat 11.

[0033] The working principle of the above technical solution is as follows: The flame-arresting breather valve is installed on the storage tank. When the storage tank is fed or the temperature rises, the pressure inside the tank increases. When the pressure exceeds the set exhalation pressure, the gas inside the tank pushes the exhalation valve disc assembly 3 upward. The exhalation valve disc assembly 3 moves upward along the guide rod 4 to open, allowing the gas inside the tank to be discharged. The pressure inside the tank is released, and the pressure decreases. Under the action of its own gravity, the exhalation valve disc assembly 3 falls back downward along the guide rod 4 until the pressure inside the tank is the same as the external air pressure. The lower end of component 3 rests against valve body 1 again; when the storage tank discharges material or the temperature drops, the pressure inside the storage tank decreases, and external gas enters valve body 1. The external gas pushes the intake valve disc assembly 2 downward, the upper spring seat 11 moves down, the spring 12 is compressed, and external gas enters the storage tank, the pressure inside the storage tank is replenished, and the pressure rises. Under the action of the elastic force of spring 12, the intake valve disc assembly 2 is pulled upward by spring 12 until the pressure inside the storage tank is the same as the external air pressure. After the intake valve disc assembly 2 moves upward, it rests against the lower end of the exhalation valve disc assembly 3 again.

[0034] Multiple guide rods 4 guide the exhalation valve disc assembly 3 to move up and down, making the exhalation valve disc assembly 3 more stable when opening or closing, and eliminating concerns about the guide rods deforming or bending.

[0035] Example 2

[0036] like Figure 1-8As shown, the upper end of the valve body 1 is provided with a flame arresting grid assembly 7, the flame arresting grid assembly 7 is provided with an annular protective net 8, and a rain cover 9 is provided on the outside of the flame arresting grid assembly 7 and the protective net 8, with the front end of the protective net 8 abutting against the side wall of the rain cover 9.

[0037] The rain cover 9 is provided with a plurality of support rods 10. One end of the support rod 10 passes through the rain cover 9, and the other end passes through the protective net 8 and the fire arrestor grid assembly 7, and is threadedly fixed to the valve body 1.

[0038] The working principle of the above technical solution is as follows: The flame-arresting breather valve is installed on the storage tank. The storage tank and the exhalation valve disc assembly 3 form chamber one 30. The exhalation valve disc assembly 3 and the flame-arresting grid assembly 7 form chamber two 31. The flame-arresting grid assembly 7 and the rain cover 9 form chamber three 32. When the storage tank is fed or the temperature rises, the pressure inside the storage tank increases. When the pressure exceeds the set exhalation pressure, the gas inside the storage tank enters chamber one 30 and pushes the exhalation valve disc assembly 3 upward. The gas inside the storage tank enters chamber two 31, then passes through the flame-arresting grid assembly 7 into chamber three 32, and is discharged through the protective net 8. When the storage tank is discharged or the temperature drops, the pressure inside the storage tank decreases. External gas enters the valve body 1, passes through the protective net 8 into chamber three 32, passes through the flame-arresting grid assembly 7 into chamber two 31, and pushes the intake valve disc assembly 2 downward. External gas enters chamber one 30 and then into the storage tank to replenish the pressure inside the storage tank.

[0039] The rain cover 9 prevents rainwater from falling onto the fire barrier assembly 7, which could corrode the fire barrier assembly 7 and shorten its service life.

[0040] Protective net 8 allows gas to circulate and prevents impurities from entering chamber three;

[0041] If a fire breaks out outside the valve body 1, the flame arrestor assembly 7 prevents external flames from entering the storage tank. The flame arrestor assembly 7 can be modularly assembled inside the valve body 1, making it easy to disassemble and install, and has the advantages of easy cleaning and maintenance.

[0042] Example 3

[0043] like Figure 1-8 As shown, two nuts 5 are threadedly connected to the guide rod 4. The two nuts 5 abut against the upper and lower sides of the limiting block 6 respectively. One end of the limiting block 6 is sleeved on the guide rod 4, and the other end of the limiting block 6 is located above the exhalation valve disc assembly 3.

[0044] The working principle of the above technical solution is as follows: by rotating the two nuts 5, the limit block 6 can be adjusted up and down, which makes it easy to accurately set the opening height of the exhalation valve disc assembly 3 and avoid the valve disc not being fully opened due to the opening height being too low, thus affecting the gas flow during exhaust.

[0045] Example 4

[0046] like Figure 1-8 As shown, a lubrication device 13 is provided at the sliding connection between the inhalation valve disc assembly 2 and the exhalation valve disc assembly 3;

[0047] The working principle of the above technical solution is as follows: the lubrication device 13 can reduce the friction between the inhalation valve disc assembly 2 and the exhalation valve disc assembly 3, so that the inhalation valve disc assembly 2 can move more smoothly and open more quickly, preventing it from jamming during operation.

[0048] The lubrication device 13 can be made of PTFE plastic ring.

[0049] Example 5

[0050] like Figure 1-8 As shown, a drain device 14 is provided on the side of the valve body 1, and a plug 15 is threadedly connected to the end of the drain device 14.

[0051] The working principle of the above technical solution is as follows: The sewage discharge device 14 is a pipe with a thread on one end. The unthreaded end of the pipe is welded to the side of the valve body 1. During normal operation, the plug 15 is threadedly connected to the threaded end of the pipe. The plug 15 is used to block the side of the valve body 1. When maintaining and cleaning the internal parts of the breather valve, the plug 15 is removed for sewage discharge.

[0052] Example 6

[0053] like Figure 1-8 As shown, the exhalation valve disc assembly 3 includes an exhalation valve disc 22, which is slidably connected between multiple guide rods 4. Multiple counterweights 20 are stacked on the exhalation valve disc 22 and fixed to the exhalation valve disc 22 by fastening bolts. A spring 12 is disposed between the exhalation valve disc 22 and the upper spring seat 11.

[0054] The lower end of the exhalation valve disc 22 is provided with a backflush edge 24, and a sealing element 23 is provided between the exhalation valve disc 22 and the backflush edge 24. The exhalation valve disc 22, the sealing element 23 and the backflush edge 24 are fixedly connected by a fastener 21, and the lower side of the sealing element 23 abuts against the valve body 1.

[0055] The working principle of the above technical solution: When exhalation is not required in the storage tank, the exhalation valve disc 22 is pressed tightly against the valve body 1 under the gravity of the counterweight 20. It can be adjusted in various ways, such as a single thick ring, multiple thin rings, or a ring composed of multiple sets of fan-shaped plates, which facilitates pressure adjustment.

[0056] Fastener 21 can be a fastening bolt. A sealing element 23 is provided between the exhalation valve disc 22 and the valve body 1. The sealing element 23 can improve airtightness and prevent the gas in chamber 1 and chamber 2 from flowing freely.

[0057] Example 7

[0058] like Figure 1-8 As shown, the inhalation valve disc assembly 2 includes an inhalation valve rod 25, a lubrication device 13 is provided at the sliding connection between the inhalation valve rod 25 and the exhalation valve disc 22, an upper spring seat 11 is installed on the inhalation valve rod 25, an inhalation valve disc 29 is sleeved on the inhalation valve rod 25, the inhalation valve disc 29 is fixed to the lower end of the inhalation valve rod 25 by a locking nut 26, a pressure plate 27 and a second sealing element 28 are provided between the locking nut 26 and the inhalation valve disc 29, and the second sealing element 28 abuts against the lower end of the exhalation valve disc 22;

[0059] The working principle of the above technical solution is as follows: the second seal 28 abuts against the lower end of the exhalation valve disc 22, and the second seal 28 increases the airtightness between the inhalation valve disc assembly 2 and the exhalation valve disc assembly 3.

[0060] By rotating the nut on the intake valve rod 25 and located at the upper end of the upper spring seat 11, the upper spring seat 11 is moved up or down on the intake valve rod 25, thereby changing the elastic force of the spring 12. The vacuum opening pressure inside the breathing valve can be precisely set, which is simple and quick.

[0061] The suction valve rod 25 has an inverted T-shaped structure, and the lower end of the suction valve disc 29 directly abuts against the suction valve rod 25. Compared with the locking structure with a nut at the lower end of a single screw, the suction valve rod 25 in this solution is more reliable because the lower end of the suction valve disc 29 abuts against the nut, which can prevent the nut from loosening and falling into the storage tank.

[0062] Example 8

[0063] like Figure 1-8 As shown, the fire barrier assembly 7 includes a bracket 17, which is fixed between the valve body 1 and the protective net 8 by a support rod 10. The fire-arresting element 18 and the pressure plate 19 are fixed to the lower end of the bracket 17 by fasteners 16 in sequence.

[0064] The working principle of the above technical solution is as follows: Both the bracket 17 and the pressure plate 19 have large-area perforations to facilitate the passage of gas through the bracket 17 and the pressure plate 19. The bracket 17 and the pressure plate 19 support the flame arrestor element 18. The fastener 16 is used to fix the bracket 17, the flame arrestor element 18 and the pressure plate 19 together. The flame arrestor element 18 prevents external flames from entering the valve body 1, thereby preventing flames from entering the storage tank.

[0065] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A fire damper breather valve characterized by, The valve includes a valve body (1), and multiple guide rods (4) are evenly installed in the inner circumference of the valve body (1). An exhalation valve disc assembly (3) is slidably connected in the middle of the multiple guide rods (4). The lower end of the exhalation valve disc assembly (3) rests on the valve body (1). An inhalation valve disc assembly (2) is slidably connected in the middle of the exhalation valve disc assembly (3). An upper spring seat (11) is installed on the inhalation valve disc assembly (2). A spring (12) is provided between the exhalation valve disc assembly (3) and the upper spring seat (11).

2. A fire damper breather valve according to claim 1, wherein The valve body (1) is provided with a fire-arresting grid assembly (7) at the upper end. The fire-arresting grid assembly (7) is provided with an annular protective net (8). A rain cover (9) is provided on the outside of the fire-arresting grid assembly (7) and the protective net (8). The front end of the protective net (8) abuts against the side wall of the rain cover (9).

3. A fire damper breather valve according to claim 2, wherein The rain cover (9) is provided with multiple support rods (10). One end of the support rod (10) passes through the rain cover (9), and the other end passes through the protective net (8) and the fire barrier assembly (7), and is threaded to the valve body (1).

4. A fire damper breather valve according to claim 1, wherein The guide rod (4) is threaded with two nuts (5), which abut against the upper and lower sides of the limiting block (6) respectively. One end of the limiting block (6) is sleeved on the guide rod (4), and the other end of the limiting block (6) is located above the exhalation valve disc assembly (3).

5. A fire damper breather valve according to claim 1, wherein The inhalation valve disc assembly (2) and the exhalation valve disc assembly (3) are provided with a lubrication device (13) at the sliding connection.

6. A fire damper breather valve according to claim 1, wherein The valve body (1) is provided with a drain device (14) on its side, and a plug (15) is threadedly connected to the end of the drain device (14).

7. A fire damper breather valve according to claim 5, wherein The exhalation valve disc assembly (3) includes an exhalation valve disc (22), which is slidably connected between multiple guide rods (4). Multiple counterweights (20) are stacked on the exhalation valve disc (22), and the multiple counterweights (20) are fixed on the exhalation valve disc (22) by fastening bolts. A spring (12) is disposed between the exhalation valve disc (22) and the upper spring seat (11).

8. A flame-arresting breather valve according to claim 7, characterized in that, The lower end of the exhalation valve disc (22) is provided with a backflush edge (24), and a sealing element (23) is provided between the exhalation valve disc (22) and the backflush edge (24). The exhalation valve disc (22), the sealing element (23) and the backflush edge (24) are fixedly connected by a fastener (21), and the lower side of the sealing element (23) abuts against the valve body (1).

9. A fire damper breather valve according to claim 7, wherein The inhalation valve disc assembly (2) includes an inhalation valve rod (25), a lubrication device (13) is provided at the sliding connection between the inhalation valve rod (25) and the exhalation valve disc (22), an upper spring seat (11) is installed on the inhalation valve rod (25), an inhalation valve disc (29) is sleeved on the inhalation valve rod (25), the inhalation valve disc (29) is fixed to the lower end of the inhalation valve rod (25) by a locking nut (26), a pressure plate (27) and a second seal (28) are provided between the locking nut (26) and the inhalation valve disc (29), and the second seal (28) abuts against the lower end of the exhalation valve disc (22).

10. A fire damper breather valve according to claim 2, wherein The fire barrier assembly (7) includes a bracket (17), which is fixed between the valve body (1) and the protective net (8) by a support rod (10). The fire-arresting element (18) and the pressure plate (19) are fixed to the lower end of the bracket (17) by fastener one (16).

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