All-weather fire-retardant breather valve

Abstract

The all-weather fire-retardant breather valve comprises a breather valve, an oil tank and a fire arrester, the breather valve comprises a valve body and a valve body cover, the valve body cover is fixedly connected with the top end of the valve body through a flange, an inner cavity and an outer cavity are formed in the valve body, a suction inlet and an exhalation opening are formed in the valve body, the suction inlet is located below the inner cavity, and the exhalation opening is located below the outer cavity. The exhalation port is positioned above the inner cavity and is used for communicating the inner cavity with the outer cavity; the side, away from the suction valve rod, of the exhalation valve disc is fixedly connected with an exhalation valve rod, the exhalation valve rod is inserted into an exhalation return mechanism installed on the valve body cover, the exhalation return mechanism is used for maintaining the stability of the exhalation valve rod in the lifting process and returning the exhalation valve rod, and the exhalation valve disc is used for sealing the exhalation opening so as to isolate the inner cavity from the outer cavity; a suction return locking mechanism is arranged in the exhalation valve disc and the exhalation valve rod, and the suction return locking mechanism is used for locking the exhalation valve disc in the ascending process of the suction valve rod, maintaining the stability of the suction valve rod in the ascending process and returning the suction valve rod.

Description

Technical Field

[0001] This utility model relates to the field of breathing valve technology, specifically an all-weather flame-arresting breathing valve. Background Technology

[0002] According to the national standard "Code for Fire Protection Design of Petrochemical Enterprises" (SY / T 0511-1996, Breathing Valves for Petroleum Storage Tanks), "Fixed-roof tanks for Class A and B liquids shall be equipped with flame arresters and breathing valves." It is evident that breathing valves and flame arresters are indispensable safety facilities for storage tanks. They not only maintain the pressure balance of the tank, ensuring its protection from damage under overpressure or vacuum conditions, but also reduce the evaporation and loss of the medium inside the tank.

[0003] Chinese Patent Publication No. CN201520044393.6 discloses an "All-Weather Flame-Arresting Breathing Valve," comprising a valve body, a valve body cover, an exhalation valve stem, an exhalation guide sleeve, an inhalation valve stem, a storage tank connecting flange, an inhalation valve disc, an exhalation valve disc, and a flame-arresting device. The valve body has a valve body cover at the top and a storage tank connecting flange at the bottom. A flame-arresting device is located at the outlet on one side of the valve body. The valve body has an inner cavity with an air inlet at the top and an air outlet at the bottom. The side of the inner cavity is connected to the outlet on the inside of the valve body. The key feature is that the exhalation guide sleeve is located on the valve body. The top of the valve cover features an electrostatic output device. Inside the exhalation guide sleeve is a matching exhalation valve stem. At the bottom of the exhalation valve stem is an exhalation valve disc, positioned directly above the air inlet. The diameter of the exhalation valve disc is larger than the outer diameter of the air inlet. The exhalation valve stem has a guide cavity into which the top of the suction valve stem extends. The bottom of the suction valve stem is connected to the suction valve disc, positioned directly above the air outlet. The diameter of the exhalation valve disc is larger than the outer diameter of the air outlet. This breather valve features a compact structure, large airflow, low leakage, corrosion resistance, and good sealing performance. The valve disc is made of polytetrafluoroethylene (PTFE), offering advantages such as low-temperature resistance and freeze protection. It also features an electrostatic output device, ensuring that the valve maintains equipotential with the tank at all times.

[0004] However, the aforementioned existing technology lacks a return mechanism after the inhalation valve rod rises with the inhalation valve disc and the exhalation valve rod rises with the exhalation valve disc. It relies solely on changes in internal air pressure, which fails to ensure that the inhalation valve disc completely seals the air inlet and the exhalation valve disc completely seals the air outlet, resulting in leakage.

[0005] Based on this, the present invention designs an all-weather flame-arresting breather valve to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide an all-weather flame-arresting breather valve to solve the problem mentioned above. Currently, when the inhalation valve rod rises with the inhalation valve disc and the exhalation valve rod rises with the exhalation valve disc, there is no return device. Instead, the valve relies solely on changes in the internal air pressure. This method cannot completely seal the air inlet with the inhalation valve disc and completely seal the air outlet with the exhalation valve disc, resulting in leakage.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An all-weather flame arrestor breathing valve includes a breathing valve, an oil tank, and a flame arrester. The breathing valve includes a valve body and a valve body cover. The valve body cover is fixedly connected to the top of the valve body via a flange. The valve body has an inner cavity and an outer cavity. The valve body has an inlet and an outlet. The inlet is located below the inner cavity and is used to connect the inner cavity and the oil tank. The outlet is located above the inner cavity and is used to connect the inner cavity and the outer cavity.

[0009] The valve body is provided with an inhalation valve disc and an exhalation valve disc. An inhalation valve rod is fixedly connected to the inhalation valve disc. The free end of the inhalation valve rod is inserted into the exhalation valve disc. The inhalation valve disc is used to seal the inhalation port to isolate the inner cavity from the oil tank.

[0010] The exhalation valve disc is fixedly connected to an exhalation valve rod on the side away from the inhalation valve rod. The exhalation valve rod is inserted into an exhalation return mechanism installed on the valve body cover. The exhalation return mechanism is used to maintain the stability of the exhalation valve rod during the lifting and lowering process and to return the exhalation valve rod. The exhalation valve disc is used to seal the exhalation outlet to isolate the inner cavity from the outer cavity.

[0011] The exhalation valve disc and exhalation valve stem are provided with an inhalation recovery locking mechanism. The inhalation recovery locking mechanism is used to lock the exhalation valve disc during the upward movement of the inhalation valve stem to maintain the stability of the inhalation valve stem during the upward movement and to return the inhalation valve stem to its original position.

[0012] As a further embodiment of this utility model: the inhalation recovery locking mechanism includes a lifting chamber, a locking chamber, and a lifting block, wherein: the lifting chamber is opened inside the exhalation valve disc and the exhalation valve stem, and the free end of the inhalation valve stem is inserted into the lifting chamber; the locking chamber is symmetrically opened on both sides of the lifting chamber and is perpendicularly connected to the lifting chamber; the lifting block is slidably connected inside the lifting chamber and moves up and down along the lifting chamber, and the free end of the inhalation valve stem abuts against the lifting block.

[0013] As a further embodiment of this utility model: the inhalation recovery locking mechanism further includes a driving block, a moving block, and a locking block, wherein: the driving block is slidably connected in the two locking cavities and is used to drive the moving block; the moving block is fixedly connected to the free end of the driving block and slidably connected in the two locking cavities, and the moving block is used to drive the locking block; the locking block is fixedly connected to the free end of the driving block and slidably connected in the two locking cavities, and the locking block extends out of the locking cavity and is inserted into the locking hole opened on the valve body to fix the exhalation valve disc to the valve body.

[0014] As a further embodiment of this utility model: the inhalation recovery locking mechanism further includes a holding block, a first spring, and a second spring, wherein: the lifting block has a first inclined surface on both sides, and the driving block has a second inclined surface matching the first inclined surface; the lifting block drives the two driving blocks to slide along the locking cavity through the first inclined surface; the holding block is symmetrically installed below the two lifting blocks and is slidably connected to the lifting cavity; the holding block is used to maintain the driving effect of the lifting block on the driving block; the first spring is fixedly installed at the top of the lifting cavity and is used to reset the lifting block; the second spring is located between the moving block and the inner wall of the locking cavity and is used to reset the moving block.

[0015] As a further embodiment of this utility model: the call-out response mechanism includes a call-out guide sleeve, a limiting cavity, a limiting block, and a third spring, wherein: the call-out guide sleeve is fixedly installed on the valve body cover; the limiting cavity is formed inside the call-out guide sleeve, the free end of the call-out valve rod is inserted into the limiting cavity and fixedly connected to the limiting block; the limiting block is slidably connected inside the limiting cavity and is used to limit the movement range of the call-out valve rod; the third spring is located between the limiting block and the inner wall of the limiting cavity and is used to return the limiting block.

[0016] As a further embodiment of this utility model: a third inclined surface is provided on the edge of the inhalation port, a fourth inclined surface corresponding to and matching the third inclined surface is provided on the inhalation valve disc, and a rubber gasket is adhered to the bottom surface of the inhalation valve disc; a fifth inclined surface is provided on the edge of the exhalation port, a sixth inclined surface corresponding to and matching the fifth inclined surface is provided on the exhalation valve disc, and a rubber gasket is adhered to the bottom surface of the exhalation valve disc.

[0017] As a further embodiment of this utility model: the side of the breather valve is fixedly connected to the flame arrester via a flange, and the bottom of the breather valve is fixedly connected to the oil tank via a flange.

[0018] As a further embodiment of this utility model: an electrostatic output device is installed at the top of the exhalation guide sleeve, and the electrostatic output device ensures that the breathing valve is always at the same potential as the oil tank.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] In this invention, when the inner cavity is under negative pressure, the gas-driven suction valve disc of the oil tank disengages from the suction port, causing the suction valve disc to drive the suction valve rod to slide along the exhalation valve disc, so as to bring the high-pressure gas in the oil tank into the inner cavity and increase the gas pressure in the inner cavity.

[0021] In this invention, the holding block can continuously press against the driving block as the lifting block rises, so as to keep the locking block continuously inserted into the locking hole and to continuously fix the exhalation valve disc to the valve body; the design of the second spring makes it easy for the driving block and the locking block to be reset by the moving block after the driving block loses its pressing force, which is beneficial to subsequent operations.

[0022] In this invention, the call-out response mechanism is used to maintain stability during the raising and lowering of the call-out valve stem and to return the call-out valve stem to its original position. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the suction recovery locking mechanism in this utility model;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0027] Figure 5 This is a schematic diagram of the call-out response mechanism in this utility model.

[0028] In the diagram: 1. Breathing valve; 11. Valve body; 12. Valve body cover; 13. Inner cavity; 14. Outer cavity; 15. Inhalation port; 16. Exhalation port; 17. Locking hole; 2. Oil tank; 3. Flame arrester; 4. Inhalation valve disc; 5. Exhalation valve disc; 6. Inhalation valve stem; 7. Exhalation valve stem; 8. Inhalation recovery locking mechanism; 81. Lifting chamber; 82. Locking chamber; 83. Lifting block; 84. Holding block; 85. Driving block; 86. Moving block; 87. Locking block; 88. First spring; 89. Second spring; 9. Exhalation recovery mechanism; 91. Exhalation guide sleeve; 92. Limiting chamber; 93. Limiting block; 94. Third spring; 95. Static electricity output device. Detailed Implementation

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

[0030] This embodiment;

[0031] All-weather flame arrestor breather valve, please refer to Figures 1-5 It includes a breather valve 1, an oil tank 2, and a flame arrester 3. The side of the breather valve 1 is fixedly connected to the flame arrester 3 through a flange, and the bottom of the breather valve 1 is fixedly connected to the oil tank 2 through a flange.

[0032] Through the above technical solution, the breather valve 1 is fixedly connected to the flame arrester 3 on the side via a flange, and the bottom of the breather valve 1 is fixedly connected to the oil tank 2 via a flange. The breather valve 1 is used to maintain the air pressure balance of the oil tank 2, ensuring that the oil tank 2 is not damaged when under overpressure or vacuum, and can reduce the volatilization and loss of the medium in the oil tank 2.

[0033] In some examples, refer to Figure 1-5 As shown, the breathing valve 1 includes a valve body 11 and a valve body cover 12. The valve body cover 12 is fixedly connected to the top of the valve body 11 through a flange. The valve body 11 has an inner cavity 13 and an outer cavity 14. The valve body 11 has an inlet 15 and an outlet 16. The inlet 15 is located below the inner cavity 13 and is used to connect the inner cavity 13 and the oil tank 2. The outlet 16 is located above the inner cavity 13 and is used to connect the inner cavity 13 and the outer cavity 14.

[0034] Through the above technical solution, the inner cavity 13 of this utility model is connected to the oil tank 2 through the inlet 15 so that the gas of the oil tank 2 passes through the inner cavity 13 into the flame arrester 3 to achieve the purpose of flame arrest; the inner cavity 13 is connected to the outer cavity 14 through the outlet 16 to prevent the gas mixed with aldehydes, alcohols and other media from evaporating into the air and causing a strong odor in the on-site environment.

[0035] In some examples, refer to Figure 1-5 As shown, the valve body 11 is provided with an inhalation valve disc 4 and an exhalation valve disc 5. An inhalation valve rod 6 is fixedly connected to the inhalation valve disc 4. The free end of the inhalation valve rod 6 is inserted into the exhalation valve disc 5. The inhalation valve disc 4 is used to seal the inhalation port 15 to isolate the inner cavity 13 and the oil tank 2. A third inclined surface is provided on the edge of the inhalation port 15. A fourth inclined surface corresponding to and matching the third inclined surface is provided on the inhalation valve disc 4, as well as a rubber gasket bonded to the bottom surface of the inhalation valve disc 4.

[0036] Through the above technical solution, when the inner cavity 13 is under negative pressure, the gas-driven suction valve disc 4 of the oil tank 2 disengages from the suction port 15, causing the suction valve disc 4 to drive the suction valve rod 6 to slide along the exhalation valve disc 5, so as to bring the high-pressure gas in the oil tank 2 into the inner cavity 13, thereby increasing the gas pressure in the inner cavity 13; the third and fourth inclined surfaces increase the contact area between the suction valve disc 4 and the suction port 15, making it easier for the suction valve disc 4 to seal the suction port 15; the rubber gasket on the bottom surface of the suction valve disc 4 can perfectly seal the suction port 15, and there will be no leakage.

[0037] In some examples, refer to Figure 1-5 As shown, an exhalation valve rod 7 is fixedly connected to the side of the exhalation valve disc 5 away from the inhalation valve rod 6. An inhalation recovery locking mechanism 8 is provided in the exhalation valve disc 5 and the exhalation valve rod 7. The inhalation recovery locking mechanism 8 is used to lock the exhalation valve disc 5 during the upward movement of the inhalation valve rod 6 to maintain the stability of the inhalation valve rod 6 during the upward movement and to return the inhalation valve rod 6 to its original position.

[0038] Through the above technical solution, the inhalation recovery locking mechanism 8 of this utility model can lock the exhalation valve disc 5 during the upward movement of the inhalation valve stem 6, so as to maintain the stability of the inhalation valve stem 6 during the upward movement and restore the inhalation valve stem 6.

[0039] In some examples, refer to Figure 1-5 As shown, the inhalation recovery locking mechanism 8 includes a lifting chamber 81, a locking chamber 82, and a lifting block 83. The lifting chamber 81 is located inside the exhalation valve disc 5 and the exhalation valve stem 7, and the free end of the inhalation valve stem 6 is inserted into the lifting chamber 81. The locking chamber 82 is symmetrically located on both sides of the lifting chamber 81 and is perpendicular to the lifting chamber 81. The lifting block 83 is slidably connected inside the lifting chamber 81 and moves up and down along the lifting chamber 81. The free end of the inhalation valve stem 6 abuts against the lifting block 83.

[0040] Through the above technical solution, in this utility model, as the inhalation valve rod 6 slides along the exhalation valve disc 5, the lifting block 83 rises along the lifting chamber 81.

[0041] In some examples, refer to Figure 1-5 As shown, the inhalation recovery locking mechanism 8 also includes a drive block 85, a moving block 86, and a locking block 87, wherein: the drive block 85 is slidably connected in the two locking cavities 82 and is used to drive the moving block 86; the moving block 86 is fixedly connected to the free end of the drive block 85 and is slidably connected in the two locking cavities 82, and the moving block 86 is used to drive the locking block 87; the locking block 87 is fixedly connected to the free end of the drive block 85 and is slidably connected in the two locking cavities 82, and the locking block 87 extends out of the locking cavity 82 and is inserted into the locking hole 17 opened on the valve body 11 to fix the exhalation valve disc 5 to the valve body 11.

[0042] Through the above technical solution, in this utility model, the lifting cavity 81 drives the driving blocks 85 on both sides to slide along the locking cavity 82. The driving block 85 drives the locking block 87 to extend out of the locking cavity 82 and insert into the locking hole 17 opened on the valve body 11 through the moving block 86, so as to fix the call valve disc 5 to the valve body 11.

[0043] In some examples, refer to Figure 1-5 As shown, the suction recovery locking mechanism 8 also includes a holding block 84, a first spring 88, and a second spring 89. The lifting block 83 has first inclined surfaces on both sides, and the driving block 85 has a second inclined surface matching the first inclined surfaces. The lifting block 83 drives the two driving blocks 85 to slide along the locking cavity 82 via the first inclined surfaces. The holding block 84 is symmetrically installed below the two lifting blocks 83 and is slidably connected to the lifting cavity 81. The holding block 84 is used to maintain the driving effect of the lifting block 83 on the driving blocks 85. The first spring 88 is fixedly installed at the top of the lifting cavity 81 and is used to reset the lifting block 83. The second spring 89 is located between the moving block 86 and the inner wall of the locking cavity 82 and is used to reset the moving block 86.

[0044] Through the above technical solution, in this utility model, the holding block 84 can continuously abut against the driving block 85 as the lifting block 83 rises, so as to keep the locking block 87 continuously inserted into the locking hole 17, so as to continuously fix the exhalation valve disc 5 to the valve body 11; the design of the second spring 89 makes it convenient for the driving block 85 to lose its resisting force, and then drive the driving block 85 and the locking block 87 to reset through the moving block 86, which is beneficial to subsequent operations; while the suction valve rod 6 abuts against the lifting block 83 and rises along the lifting cavity 81, it compresses the first spring 88. When the air pressure in the inner cavity 13 increases, the first spring 88 drives the suction valve disc 4 to seal the suction port 15 through the lifting block 83 and the suction valve rod 6; the setting of the first inclined surface and the second inclined surface makes it convenient for the lifting block 83 to drive the driving blocks 85 on both sides to slide along the locking cavity 82.

[0045] Working process of the inhalation recovery locking mechanism 8:

[0046] When the inner cavity 13 is under negative pressure, the gas-driven suction valve disc 4 of the oil tank 2 disengages from the suction port 15. Then, the suction valve disc 4 drives the suction valve rod 6 to slide along the exhalation valve disc 5. The suction valve rod 6 pushes against the lifting block 83 and rises along the lifting cavity 81. Then, the lifting block 83 drives the driving blocks 85 on both sides to slide along the locking cavity 82 through the first inclined surface and the second inclined surface. The driving block 85 extends out of the locking cavity 82 through the moving block 86 and the locking block 87 and inserts into the locking hole 17 opened on the valve body 11 to fix the exhalation valve disc 5 to the valve body 11. At the same time, the first spring 88 is compressed. The first spring 88 drives the suction valve disc 4 to seal the suction port 15 through the lifting block 83 and the suction valve rod 6.

[0047] In some examples, refer to Figure 1-5As shown, the call valve stem 7 is inserted into the call return mechanism 9 installed on the valve body cover 12. The call return mechanism 9 is used to maintain the stability of the call valve stem 7 during the lifting and lowering process and to return the call valve stem 7. The call valve disc 5 is used to seal the call outlet 16 to isolate the inner cavity 13 and the outer cavity 14. The edge of the call outlet 16 is provided with a fifth inclined surface. The call valve disc 5 is provided with a sixth inclined surface that corresponds to and matches the fifth inclined surface, as well as a rubber gasket bonded to the bottom surface of the call valve disc 5.

[0048] Through the above technical solution, the exhalation recovery mechanism 9 in this utility model is used to maintain the stability of the exhalation valve rod 7 during the lifting and lowering process and to return the exhalation valve rod 7; the exhalation valve disc 5 is used to seal the exhalation outlet 16 to isolate the inner cavity 13 and the outer cavity 14; the fifth and sixth inclined surfaces increase the contact area between the exhalation valve disc 5 and the exhalation outlet 16, making it easier for the exhalation valve disc 5 to seal the exhalation outlet 16; the rubber gasket on the bottom surface of the exhalation valve disc 5 can perfectly seal the exhalation outlet 16 without leakage; when the inner cavity 13 is under positive pressure, the high-pressure gas in the inner cavity 13 drives the exhalation valve disc 5 to disengage from the exhalation outlet 16 to reduce the gas pressure in the inner cavity 13.

[0049] In some examples, refer to Figure 1-5 As shown, the call response mechanism 9 includes a call guide sleeve 91, a limiting cavity 92, a limiting block 93, and a third spring 94, wherein: the call guide sleeve 91 is fixedly installed on the valve body cover 12; the limiting cavity 92 is opened in the call guide sleeve 91, the free end of the call valve rod 7 is inserted into the limiting cavity 92 and fixedly connected to the limiting block 93; the limiting block 93 is slidably connected in the limiting cavity 92 and is used to limit the movement range of the call valve rod 7; the third spring 94 is located between the limiting block 93 and the inner wall of the limiting cavity 92 and is used to return the limiting block 93.

[0050] Through the above technical solution, in the present invention, during the process of the exhalation valve disc 5 rising away from the exhalation outlet 16, the exhalation valve rod 7 is driven to rise, and the exhalation valve rod 7 drives the limiting block 93 to compress the third spring 94; during the process of the limiting block 93 rising along the limiting cavity 92, it is beneficial to maintain the stability of the exhalation valve disc 5 during the rising process; the setting of the third spring 94 facilitates the exhalation valve disc 5 to be driven to seal the exhalation outlet 16 by the limiting block 93 and the exhalation valve rod 7.

[0051] In some examples, refer to Figure 1-5 As shown, an electrostatic output device 95 is installed at the top of the exhalation guide sleeve 91, which ensures that the breathing valve 1 is always at the same potential as the oil tank 2.

[0052] Through the above technical solution, the electrostatic output device on the exhalation guide sleeve 91 in this utility model ensures that the breathing valve 1 is always at the same potential as the oil tank 2.

[0053] The working process of outbound response mechanism 9:

[0054] When the inner cavity 13 is under positive pressure, firstly, the high-pressure gas in the inner cavity 13 drives the exhalation valve disc 5 to disengage from the exhalation outlet 16. Then, the exhalation valve rod 7 of the exhalation valve disc 5 rises, and the exhalation valve rod 7 drives the limiting block 93 to compress the third spring 94. When the air pressure in the inner cavity 13 decreases, the third spring 94 drives the exhalation valve disc 5 to seal the exhalation outlet 16 through the limiting block 93 and the exhalation valve rod 7.

[0055] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An all-weather flame arrestor breather valve, comprising a breather valve (1), an oil tank (2), and a flame arrester (3), characterized in that: The breathing valve (1) includes a valve body (11) and a valve body cover (12). The valve body cover (12) is fixedly connected to the top of the valve body (11) through a flange. The valve body (11) has an inner cavity (13) and an outer cavity (14). The valve body (11) has an inlet (15) and an outlet (16). The inlet (15) is located below the inner cavity (13) and is used to connect the inner cavity (13) and the oil tank (2). The outlet (16) is located above the inner cavity (13) and is used to connect the inner cavity (13) and the outer cavity (14). The valve body (11) is provided with an inhalation valve disc (4) and an exhalation valve disc (5). An inhalation valve rod (6) is fixedly connected to the inhalation valve disc (4). The free end of the inhalation valve rod (6) is inserted into the exhalation valve disc (5). The inhalation valve disc (4) is used to seal the inhalation port (15) to isolate the inner cavity (13) and the oil tank (2). The exhalation valve disc (5) is fixedly connected to an exhalation valve rod (7) on the side away from the inhalation valve rod (6). The exhalation valve rod (7) is inserted into the exhalation return mechanism (9) installed on the valve body cover (12). The exhalation return mechanism (9) is used to maintain the stability of the exhalation valve rod (7) during the lifting and lowering process and to return the exhalation valve rod (7). The exhalation valve disc (5) is used to seal the exhalation outlet (16) to isolate the inner cavity (13) and the outer cavity (14). The exhalation valve disc (5) and the exhalation valve stem (7) are provided with an inhalation recovery locking mechanism (8). The inhalation recovery locking mechanism (8) is used to lock the exhalation valve disc (5) during the upward movement of the inhalation valve stem (6) to maintain the stability of the inhalation valve stem (6) during the upward movement and to restore the inhalation valve stem (6).

2. The all-weather flame arrestor breather valve according to claim 1, characterized in that: The inhalation recovery locking mechanism (8) includes a lifting chamber (81), a locking chamber (82), and a lifting block (83), wherein: The lifting chamber (81) is opened in the exhalation valve disc (5) and the exhalation valve stem (7), and the free end of the inhalation valve stem (6) is inserted into the lifting chamber (81); The locking cavity (82) is symmetrically opened on both sides of the lifting cavity (81) and is perpendicular to the lifting cavity (81); The lifting block (83) is slidably connected inside the lifting cavity (81) and moves up and down along the lifting cavity (81), with the free end of the suction valve rod (6) abutting against the lifting block (83).

3. The all-weather flame arrestor breather valve according to claim 2, characterized in that: The inhalation recovery locking mechanism (8) further includes a drive block (85), a moving block (86), and a locking block (87), wherein: The drive block (85) is slidably connected in the two locking cavities (82) and is used to drive the moving block (86); The movable block (86) is fixedly connected to the free end of the driving block (85) and slidably connected in the two locking cavities (82). The movable block (86) is used to drive the locking block (87). The locking block (87) is fixedly connected to the free end of the driving block (85) and slidably connected in the two locking cavities (82). The locking block (87) extends out of the locking cavity (82) and is inserted into the locking hole (17) opened on the valve body (11) to fix the call valve disc (5) to the valve body (11).

4. The all-weather flame arrestor breather valve according to claim 3, characterized in that: The inhalation recovery locking mechanism (8) further includes a holding block (84), a first spring (88), and a second spring (89), wherein: The lifting block (83) has a first inclined surface on both sides, and the driving block (85) has a second inclined surface that matches the first inclined surface. The lifting block (83) drives the two driving blocks (85) to slide along the locking cavity (82) through the first inclined surface. The holding block (84) is symmetrically installed below the two lifting blocks (83) and is slidably connected to the lifting cavity (81). The holding block (84) is used to maintain the driving effect of the lifting block (83) on the driving block (85). The first spring (88) is fixedly installed at the top of the lifting cavity (81) and is used to reset the lifting block (83); The second spring (89) is located between the moving block (86) and the inner wall of the locking cavity (82) and is used to reset the moving block (86).

5. The all-weather flame arrestor breather valve according to claim 4, characterized in that: The call response mechanism (9) includes a call guide sleeve (91), a limiting cavity (92), a limiting block (93), and a third spring (94), wherein: The exhalation guide sleeve (91) is fixedly installed on the valve body cover (12); The limiting cavity (92) is opened in the exhalation guide sleeve (91), and the free end of the exhalation valve stem (7) is inserted into the limiting cavity (92) and fixedly connected to the limiting block (93); The limiting block (93) is slidably connected in the limiting cavity (92) and is used to limit the range of movement of the exhalation valve rod (7); The third spring (94) is located between the limiting block (93) and the inner wall of the limiting cavity (92), and is used to return the limiting block (93).

6. The all-weather flame arrestor breather valve according to claim 5, characterized in that: The edge of the inlet (15) is provided with a third inclined surface, the inlet valve disc (4) is provided with a fourth inclined surface that corresponds to and matches the third inclined surface, and a rubber gasket is attached to the bottom surface of the inlet valve disc (4). The exhalation outlet (16) has a fifth inclined surface at its edge, the exhalation valve disc (5) has a sixth inclined surface that corresponds to and matches the fifth inclined surface, and a rubber gasket is bonded to the bottom surface of the exhalation valve disc (5).

7. The all-weather flame arrestor breather valve according to claim 6, characterized in that: The breather valve (1) is fixedly connected to the flame arrester (3) on its side via a flange, and the bottom surface of the breather valve (1) is fixedly connected to the oil tank (2) via a flange.

8. The all-weather flame arrestor breather valve according to claim 7, characterized in that: The top of the exhalation guide sleeve (91) is equipped with an electrostatic output device (95), which ensures that the breathing valve (1) is always at the same potential as the oil tank (2).

Images