An integrated fire damper breather valve

Abstract

This utility model relates to the field of breathing valve technology, and more specifically, to an integrated flame-arresting breathing valve, comprising: a valve body assembly, the valve body assembly including: an outer valve body and an inner valve body connected to the outer valve body; a flame-arresting element connected to the bottom inlet / outlet of the outer valve body, the flame-arresting element being sleeved on the outer wall of the base assembly; one end of the base assembly inserted into the valve body assembly being fixed to the inner wall of the outer valve body and connected to the inner valve body; the inner valve body is provided with an exhalation structure to allow gas in the storage tank to flow unidirectionally to a first chamber formed between the inner wall of the inner valve body, the outer wall of the base assembly, and the inner wall of the outer valve body when the internal pressure of the storage tank increases. In this integrated flame-arresting breathing valve, the flame-arresting element is located at the bottom inlet / outlet of the outer valve body, so that the flame-arresting element is not affected by debris, dust, or rainwater, requiring no protective device. The flame-arresting element has a structure that facilitates disassembly and replacement, making subsequent disassembly and maintenance convenient and saving manpower and resources.

Description

Technical Field

[0001] This utility model relates to the field of breathing valve technology, and more specifically, to an integrated flame arrestor breathing valve. Background Technology

[0002] In industrial production and storage processes, various types of storage tanks are widely used to store flammable, explosive, and other hazardous liquids or gases. To ensure the safe operation of these tanks, it is essential to maintain internal pressure balance and prevent external flames from entering and causing fires or explosions. Flame arrestor breather valves, as a critical safety device, play a vital role in this regard. The working principle of a flame arrestor breather valve is to regulate the internal pressure balance of the tank using its own structure, and to prevent external flames from entering the tank through the breather valve using flame-arresting elements. When the pressure inside the tank increases, the exhalation valve assembly opens, allowing gas to escape from the tank and preventing further pressure increases. When the pressure inside the tank decreases to the negative pressure setting value of the flame arrestor breather valve, the outside atmosphere opens the intake valve assembly, allowing air to enter the tank and preventing further pressure drops. When the gas pressure inside the tank remains within the pressure range controlled by the flame arrestor breather valve, the breather valve remains inactive, thus maintaining the tank's airtightness.

[0003] Currently, flame-arresting breather valves on the market mainly come in three structural forms: combined, split, and integrated. Among them, integrated flame-arresting breather valves are more widely used due to their relatively simple structure and convenient installation. Most integrated flame-arresting breather valves typically have flame-arresting elements installed on the side. When the pressure inside the storage tank changes, the air pressure is regulated by opening and closing the exhalation valve disc assembly and the inhalation valve disc assembly. However, existing integrated flame-arresting breather valves have a less compact overall structure and are relatively heavy, which not only increases manufacturing costs but also causes many inconveniences during installation and maintenance. For example, they require a stronger support structure to support their weight, increasing additional construction costs. Furthermore, existing integrated flame-arresting breather valves require a large installation space, making installation difficult or even impossible in some space-constrained industrial locations, such as offshore platforms and small chemical workshops, thus limiting their application scope. Utility Model Content

[0004] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, this utility model provides an integrated flame-arresting breather valve, comprising: a valve body assembly, the valve body assembly including: an outer valve body and an inner valve body connected to the outer valve body; a flame-arresting element connected to the bottom inlet and outlet of the outer valve body, the flame-arresting element being sleeved on the outer wall of the base assembly; one end of the base assembly inserted into the valve body assembly being fixed to the inner wall of the outer valve body and connected to the inner valve body; the inner valve body is provided with an exhalation structure to allow gas in the storage tank to flow unidirectionally to a first chamber formed between the inner wall of the inner valve body, the outer wall of the base assembly, and the inner wall of the outer valve body when the internal pressure of the storage tank increases; a second chamber connected to the return air port on the side of the base assembly is formed between the outer wall of the inner valve body, the outer wall of the base assembly, and the inner wall of the outer valve body; the inner valve body is provided with an intake structure to allow external gas to flow unidirectionally through the first chamber to the second chamber and the return air port when the internal pressure of the storage tank decreases.

[0006] Preferably, the lower part of the outer valve body is a tapered structure with the diameter increasing from top to bottom.

[0007] Preferably, the outer conical surface of the outer valve body is provided with a purge port for connecting to a purge device. When the purge port is not connected to a purge device, the purge port is sealed by a sealing plug.

[0008] Preferably, there are multiple purge ports, and the multiple purge ports with oblique flame arresting elements are distributed around the outer valve body with the outer valve body axis as the center.

[0009] Preferably, a sensor interface is provided on the outer conical surface of the outer valve body, and a temperature sensor for monitoring the temperature at the flame arrestor element is installed in the sensor interface.

[0010] Preferably, the outer side of the flame arrester is fastened to the air inlet / outlet at the bottom of the outer valve body by bolts and nuts, and the inner side of the flame arrester is sealed to the outer wall of the base assembly by a sealing element.

[0011] Preferably, the flame arrestor element, the outer valve body, and the base assembly are arranged coaxially.

[0012] Preferably, the valve cover assembly is sealed to the top of the outer valve body by bolts and nuts.

[0013] Preferably, the suction structure includes: a suction valve seat and a suction valve disc assembly; the suction valve seat is fixedly connected to the suction port above the inner valve body; the suction valve disc assembly includes: a suction valve disc body covering the opening above the suction valve seat, the suction valve disc body being connected to the lower shaft of the first stepped shaft; the upper surface of the suction valve disc body abuts against the stepped surface of the first stepped shaft, the upper shaft of the first stepped shaft is slidably fitted in the central guide groove of the valve cover assembly; a first nut threadedly connected to the lower shaft of the first stepped shaft abuts against the lower surface of the suction valve disc body.

[0014] Preferably, the exhalation structure includes: an exhalation valve seat and an exhalation valve disc assembly; the exhalation valve seat is fixedly connected to the exhalation port below the inner valve body; the exhalation valve disc assembly includes: an exhalation valve disc body covering the opening above the exhalation valve seat, the exhalation valve disc body being connected to the lower shaft of the second stepped shaft; the upper surface of the exhalation valve disc body abuts against the stepped surface of the second stepped shaft, the upper shaft of the second stepped shaft is slidably fitted in the bottom guide groove of the lower shaft of the first stepped shaft; a second nut threadedly connected to the lower shaft of the second stepped shaft is abutted against the lower surface of the exhalation valve disc body; the lower shaft of the second stepped shaft is slidably mounted on a guide bracket on the inner wall of the base assembly.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] In this integrated flame-arresting breathing valve, the flame-arresting element is located at the inlet and outlet of the bottom of the outer valve body, ensuring that the flame-arresting element is unaffected by debris, dust, and rainwater, eliminating the need for protective devices. The flame-arresting element is designed for easy disassembly and replacement, facilitating subsequent disassembly and maintenance and saving manpower and resources. The overall structure of this invention is more compact and reasonable, with less weight and lower cost. Whether exhaling or inhaling, the gas passes through the flame-arresting element, ensuring safety and reliability. A purge port on the outer valve body is provided for connecting to a purge device, facilitating wind-powered dust removal of the flame-arresting element and initial cleaning without disassembling it. A temperature sensor is installed in the sensor interface on the outer valve body to monitor the temperature at the flame-arresting element, allowing for real-time monitoring of the element's temperature and understanding its status. Guide structures are provided at the top and bottom of both the exhalation valve disc assembly and the inhalation valve disc assembly, ensuring the stability of the integrated flame-arresting breathing valve during exhalation or inhalation.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 A schematic diagram of the integrated flame arrestor breather valve provided in an embodiment of this utility model;

[0020] Figure 2 A schematic diagram of the overall exhalation operation of the integrated flame arrestor breathing valve provided for an embodiment of this utility model;

[0021] Figure 3 A schematic diagram of the overall intake operation of the integrated flame arrestor breather valve provided for an embodiment of this utility model;

[0022] Figure 4 A schematic diagram of the exhalation valve disc assembly provided in an embodiment of this utility model;

[0023] Figure 5 A schematic diagram of the intake valve disc assembly provided in an embodiment of this utility model.

[0024] Icons: Base assembly 1; Flame arrestor element 2; Exhalation valve disc assembly 3; Exhalation valve disc body 301; Second step shaft 302; Second nut 303; Inhalation valve disc assembly 4; Inhalation valve disc body 401; First step shaft 402; First nut 403; Valve cover assembly 5; Inhalation valve seat 6; Exhalation valve seat 7; Purge port 8; Valve body assembly 9; Outer valve body 901; Inner valve body 902; Seal 10; First chamber 11; Return port 12; Second chamber 13. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0027] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0028] The following is in conjunction with the appendix Figures 1-5 The present invention will be described in further detail below.

[0029] Example 1:

[0030] like Figures 1-5As shown, an integrated flame-arresting breather valve includes: a valve body assembly 9, which includes an outer valve body 901 and an inner valve body 902 connected within the outer valve body 901; a flame-arresting element 2 is connected to the bottom inlet / outlet of the outer valve body 901, and the flame-arresting element 2 is sleeved on the outer wall of the base assembly 1; one end of the base assembly 1 is inserted into the valve body assembly 9 and fixed to the inner wall of the outer valve body 901, and connected to the inner valve body 902; the inner valve body 902 is provided with an exhalation structure to allow for ventilation when the pressure inside the storage tank increases. The gas inside the storage tank flows unidirectionally into the first chamber 11 formed between the inner wall of the inner valve body 902, the outer wall of the base assembly 1, and the inner wall of the outer valve body 901; a second chamber 13 is formed between the outer wall of the inner valve body 902, the outer wall of the base assembly 1, and the inner wall of the outer valve body 901, which communicates with the return air port 12 on the side of the base assembly 1; the inner valve body 902 is provided with an air intake structure so that when the pressure inside the storage tank decreases, the external gas flows unidirectionally through the first chamber 11 to the second chamber 13 and the return air port 12.

[0031] The working principle and technical effects of the above scheme are as follows:

[0032] In this integrated flame-arresting breather valve, the base assembly 1 is sealed to the bottom of the storage tank. When the pressure inside the storage tank increases, the exhalation structure installed on the inner valve body 902 begins to function. Because the pressure inside the storage tank is greater than the pressure in the first chamber 11 and the external pressure, the gas inside the storage tank pushes the exhalation structure on the inner valve body 902 to open under the action of the pressure difference. The gas flows unidirectionally through the exhalation structure to the first chamber 11, and is discharged to the outside after passing through the flame-arresting element 2. Until the pressure inside the storage tank gradually decreases and reaches the pressure balance range set by the flame-arresting breather valve, the exhalation structure closes and the gas stops flowing; the pressure inside the storage tank decreases, achieving flame-arresting breathing. When the valve is set to the negative pressure value, the external atmospheric pressure and the atmospheric pressure in the first chamber 11 are greater than the pressure in the second chamber 13 and the pressure in the storage tank. At this time, the suction structure on the inner valve body 902 is opened under the action of the pressure difference. The external gas enters the first chamber 11 after passing through the flame arrestor element 2, and enters the second chamber 13 through the opened suction structure on the inner valve body 902. Since the second chamber 13 is connected to the return air port 12 on the side of the base assembly 1, the gas finally enters the storage tank through the return air port 12, so that the pressure in the storage tank no longer continues to drop. When the pressure in the storage tank returns to the pressure range controlled by the flame arrestor breather valve, the suction structure closes and the external gas stops entering.

[0033] In this invention, the flame arrestor element 2 is sleeved on the outer wall of the base assembly 1 and connected to the air inlet and outlet at the bottom of the outer valve body 901. The integrated design optimizes space utilization, enabling the entire flame arrestor breather valve to integrate multiple functions within a limited space. Compared with the traditional integrated flame arrestor breather valve, it requires less installation space and is more suitable for use in industrial sites with limited space. The air inlet and outlet at the bottom of the outer valve body 901 are connected to the flame arrestor element 2. When gas enters or exits the storage tank, it must pass through the flame arrestor element 2. The flame arrestor element 2 can prevent external flames from entering the storage tank through the flame arrestor breather valve. Even in extreme situations such as external fires, it can provide reliable fire protection for the storage tank and improve the safety of the storage tank. By setting the exhalation and inhalation structures on the inner valve body 902, unidirectional flow of gas is realized during the exhalation and inhalation process. The flow direction and flow rate of the gas can be precisely controlled, ensuring that the gas pressure can be adjusted in a timely and accurate manner when the pressure inside the storage tank changes, so that the pressure inside the storage tank is always kept within a safe range. Meanwhile, the unidirectional flow design also avoids gas backflow and leakage, improving the working stability and reliability of the flame arrestor breather valve. The flame arrestor element 2 is located at the inlet and outlet of the bottom of the outer valve body 901, so that the flame arrestor element 2 is not affected by debris, dust and rainwater, and does not require protective devices. The flame arrestor element 2 has a structure that is easy to disassemble and replace, making it convenient for later disassembly and maintenance, saving manpower and material resources. The flame arrestor element 2 can adopt a flame arrestor grid or other flame arrestor ventilation structure.

[0034] Example 2:

[0035] like Figures 1-5 As shown, the lower part of the outer valve body 901 is a tapered structure with the diameter increasing from top to bottom. A purge port 8 for connecting to a purging device is provided on the outer tapered surface of the outer valve body 901. When the purge port 8 is not connected to a purging device, it is sealed with a plug. Multiple purge ports are provided, with multiple purge ports for the obliquely positioned flame arrestor elements 2 distributed around the axis of the outer valve body 901. A sensor interface is provided on the outer tapered surface of the outer valve body 901, and a temperature sensor for monitoring the temperature at the flame arrestor element 2 is installed inside the sensor interface.

[0036] The working principle and technical effects of the above scheme are as follows:

[0037] In this utility model, an integrated flame arrestor breather valve has a purge port 8 on the outer valve body 901 for connecting to a purge device. This facilitates the use of the purge device to remove dust from the flame arrestor element 2 using airflow, allowing for preliminary cleaning of the flame arrestor element 2 without disassembling it. Multiple purge ports are obliquely arranged on the outer valve body 901 and distributed around the axis of the outer valve body 901, which improves the uniformity of cleaning the flame arrestor element 2 and enhances the cleaning effect. A temperature sensor is installed in the sensor interface on the outer valve body 901 to monitor the temperature at the flame arrestor element, allowing for real-time monitoring of the flame arrestor element's temperature and facilitating understanding of the flame arrestor element's status.

[0038] The outer side of the flame arrester element 2 is fastened to the air inlet and outlet at the bottom of the outer valve body 901 by bolts and nuts. The inner side of the flame arrester element 2 is sealed to the outer wall of the base assembly 1 by the sealing element 10, which makes the flame arrester element 2 easy to install or disassemble and facilitates inspection and maintenance.

[0039] The flame arrestor element 2, the outer valve body 901 and the base assembly 1 are coaxially arranged, resulting in a compact structure.

[0040] Example 3:

[0041] like Figures 1-5 As shown, the top of the outer valve body 901 is sealed to the valve cover assembly 5 by bolts and nuts. The suction structure includes: suction valve seat 6 and suction valve disc assembly 4; suction valve seat 6 is fixed to the suction port above the inner valve body 902; suction valve disc assembly 4 includes: suction valve disc body 401 covering the opening above the suction valve seat 6, suction valve disc body 401 is connected to the lower shaft of the first stepped shaft 402; the upper surface of suction valve disc body 401 abuts against the stepped surface of the first stepped shaft 402, the upper shaft of the first stepped shaft 402 is slidably fitted in the central guide groove of the valve cover assembly 5; a first nut 403 threadedly connected to the lower shaft of the first stepped shaft 402 abuts against the lower surface of suction valve disc body 401.

[0042] The working principle and technical effects of the above scheme are as follows:

[0043] In this utility model, an integrated flame-arresting breather valve has a valve cover assembly 5 connected to the top of the outer valve body 901 via bolts and nuts, making the valve cover assembly 5 easy to install or remove. Under normal conditions, the intake valve disc body 401 of the intake structure covers the opening of the intake valve seat 6, closing the opening above the intake valve seat 6. When the pressure inside the storage tank drops to the negative pressure setting value of the flame-arresting breather valve, the external atmospheric pressure and the atmospheric pressure inside the first chamber 11 are greater than the pressure inside the second chamber 13 and the pressure inside the storage tank. At this time, the intake valve disc body 401, covering the opening above the intake valve seat 6, moves away from the opening above the intake valve seat 6 under the pressure difference. When the intake valve disc body 401 drives the first stepped shaft 402 to move, the upper shaft of the first stepped shaft 402 is located on the valve cover assembly 5. The central guide groove slides, and the lower shaft of the first stepped shaft 402 slides on the upper shaft of the second stepped shaft 302 through the bottom guide groove. Through bidirectional guidance and limiting, the stability of the movement of the intake valve disc body 401 is effectively ensured, and the opening or closing effect of the intake valve disc body 401 is guaranteed. When the intake valve disc body 401 moves away from the upper opening of the intake valve seat 6 under the action of pressure difference, the outside gas enters the second chamber 13 through the first chamber 11 and the upper opening of the intake valve seat 6, and enters the storage tank through the return port 12, so that the pressure in the storage tank no longer continues to drop. When the pressure in the storage tank returns to the pressure range controlled by the flame arrestor breather valve, the intake valve disc body 401 falls under its own gravity to close the upper opening of the intake valve seat 6, and the outside gas stops entering.

[0044] Example 4:

[0045] like Figures 1-5 As shown, the exhalation structure includes: an exhalation valve seat 7 and an exhalation valve disc assembly 3; the exhalation valve seat 7 is fixed to the exhalation port below the inner valve body 902; the exhalation valve disc assembly 3 includes: an exhalation valve disc body 301 covering the opening above the exhalation valve seat 7, the exhalation valve disc body 301 being connected to the lower shaft of the second stepped shaft 302; the upper surface of the exhalation valve disc body 301 abuts against the stepped surface of the second stepped shaft 302, the upper shaft of the second stepped shaft 302 is slidably fitted in the bottom guide groove of the lower shaft of the first stepped shaft 402; a second nut 303 threadedly connected to the lower shaft of the second stepped shaft 302 abuts against the lower surface of the exhalation valve disc body 301; the lower shaft of the second stepped shaft 302 is slidably mounted on a guide frame on the inner wall of the base assembly 1.

[0046] The working principle and technical effects of the above scheme are as follows:

[0047] In this integrated flame-arresting breather valve, under normal conditions, the exhalation valve disc body 301 covers the opening above the exhalation valve seat 7, thus closing the opening above the exhalation valve seat 7. When the pressure inside the storage tank increases, because the pressure inside the storage tank is greater than the pressure in the first chamber 11 and the external pressure, the gas inside the storage tank pushes the exhalation valve disc body 301 upward under the action of the pressure difference, releasing the closed state of the opening above the exhalation valve seat 7. This allows the gas inside the storage tank to flow unidirectionally to the first chamber 11 through the opening above the exhalation valve seat 7, and then to the outside after passing through the flame-arresting element 2, until the pressure inside the storage tank gradually decreases and reaches the pressure balance range set by the flame-arresting breather valve, the exhalation valve... The disc body 301 falls under its own weight and re-covers the opening above the exhalation valve seat 7, stopping the flow of gas. When the exhalation valve disc body 301 moves up and down, it drives the second stepped shaft 302 to move synchronously. The second stepped shaft 302 acts as a guide and limiter. When the exhalation valve disc body 301 moves up and down, it drives the upper shaft of the second stepped shaft 302 to slide in the bottom guide groove of the lower shaft of the first stepped shaft 402, and causes the lower shaft of the second stepped shaft 302 to slide on the guide frame on the inner wall of the base assembly 1. Through bidirectional guidance and limitation, the stability of the movement of the exhalation valve disc body 301 is effectively ensured, and the opening or closing effect of the exhalation valve disc body 301 is guaranteed.

[0048] A counterweight is slidably connected to the upper shaft of the second-step shaft 302, and the counterweight abuts against the upper surface of the exhalation valve disc body 301; a limiting ring is threaded or connected to the upper shaft of the second-step shaft 302 through a pin hole and a pin shaft, and the limiting ring abuts against the upper surface of the counterweight. The preset opening pressure of the exhalation structure can be changed by replacing the counterweight with a different weight to meet the usage requirements of different situations.

[0049] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 are not intended to 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.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An integrated flame arrestor breather valve, characterized in that, include: A valve body assembly, comprising: an outer valve body and an inner valve body connected within the outer valve body; A flame arrester is connected to the air inlet and outlet at the bottom of the outer valve body, and the flame arrester is sleeved on the outer wall of the base assembly. One end of the base assembly is inserted into the valve body assembly and fixed to the inner wall of the outer valve body, and connected to the inner valve body. The inner valve body is provided with an exhalation structure to allow gas in the tank to flow unidirectionally to the first chamber formed between the inner wall of the inner valve body, the outer wall of the base assembly, and the inner wall of the outer valve body when the internal pressure of the tank increases. A second chamber is formed between the outer wall of the inner valve body, the outer wall of the base assembly, and the inner wall of the outer valve body, and communicates with the return air port on the side of the base assembly. The inner valve body is provided with an intake structure to allow external gas to flow unidirectionally through the first chamber to the second chamber and the return air port when the internal pressure of the tank decreases.

2. The integrated flame arrestor breather valve according to claim 1, characterized in that, The lower part of the outer valve body is a tapered structure with the diameter increasing from top to bottom.

3. The integrated flame arrestor breather valve according to claim 2, characterized in that, The outer conical surface of the outer valve body is provided with a purge port for connecting to the purge equipment. When the purge port is not connected to the purge equipment, the purge port is sealed by a sealing plug.

4. The integrated flame arrestor breather valve according to claim 3, characterized in that, The purge port is provided in multiple ways, with multiple oblique flame arresting elements arranged around the outer valve body axis.

5. The integrated flame arrestor breather valve according to claim 2, characterized in that, A sensor interface is provided on the outer conical surface of the outer valve body, and a temperature sensor for monitoring the temperature at the flame arrestor element is installed inside the sensor interface.

6. The integrated flame arrestor breather valve according to claim 1, characterized in that, The outer side of the flame arrester is fastened to the air inlet and outlet at the bottom of the outer valve body by bolts and nuts, and the inner side of the flame arrester is sealed to the outer wall of the base assembly by a sealing element.

7. The integrated flame arrestor breather valve according to claim 6, characterized in that, The flame arrestor element, outer valve body, and base assembly are coaxially arranged.

8. The integrated flame arrestor breather valve according to claim 1, characterized in that, The valve cover assembly is sealed to the top of the outer valve body by bolts and nuts.

9. The integrated flame arrestor breather valve according to claim 8, characterized in that, The suction structure includes: a suction valve seat and a suction valve disc assembly; the suction valve seat is fixedly connected to the suction port above the inner valve body; the suction valve disc assembly includes: a suction valve disc body covering the opening above the suction valve seat, the suction valve disc body being connected to the lower shaft of the first stepped shaft; the upper surface of the suction valve disc body abuts against the stepped surface of the first stepped shaft, the upper shaft of the first stepped shaft being slidably fitted in the central guide groove of the valve cover assembly; a first nut threadedly connected to the lower shaft of the first stepped shaft is abutted against the lower surface of the suction valve disc body.

10. The integrated flame arrestor breather valve according to claim 9, characterized in that, The exhalation structure includes: an exhalation valve seat and an exhalation valve disc assembly; the exhalation valve seat is fixedly connected to the exhalation port below the inner valve body; the exhalation valve disc assembly includes: an exhalation valve disc body covering the opening above the exhalation valve seat, the exhalation valve disc body being connected to the lower shaft of the second stepped shaft; the upper surface of the exhalation valve disc body abuts against the stepped surface of the second stepped shaft, the upper shaft of the second stepped shaft slidingly engaging in the bottom guide groove of the lower shaft of the first stepped shaft; a second nut threadedly connected to the lower shaft of the second stepped shaft abuts against the lower surface of the exhalation valve disc body; the lower shaft of the second stepped shaft slides on a guide bracket on the inner wall of the base assembly.

Images