A bidirectionally mountable pass-through breather valve

Abstract

The utility model belongs to the technical field of breathing valve, especially relate to a straight -through type breathing valve of two -way installation, including valve body subassembly, the left connecting pipe and right connecting pipe are equipped respectively in valve body subassembly left and right sides, the upper valve seat and lower valve seat are fixed and arranged in valve body subassembly inside up and down, the upper breathing valve disc subassembly is connected with sliding on the upper valve seat, the lower breathing valve disc subassembly is connected with sliding on the lower valve seat, the inlet and outlet of breathing valve are arranged in the both sides of valve body, the both sides of valve body can be installed and fixed with the side of storage tank, carry out the pressure increasing or pressure reducing to storage tank, guarantee the safety of storage tank, and the upper breathing valve disc subassembly and lower breathing valve disc subassembly are installed in the inside of valve body subassembly, structure is more compact, adapts the scene use of narrow space, the insufficient storage tank bearing capacity and needing installation in the side of storage tank.

Description

Technical Field

[0001] This utility model belongs to the field of breathing valve technology, and in particular relates to a straight-through breathing valve that can be installed in both directions. Background Technology

[0002] Breathing valves are safe and energy-saving products used to maintain the pressure balance of storage tanks and reduce the volatilization of media. Breathing valves make full use of the pressure-bearing capacity of the storage tank itself to reduce media discharge. The principle is to use the weight of the positive and negative pressure valve discs to control the positive pressure of exhaust and the negative pressure of intake of the storage tank. When the positive pressure is used, the pressure of the gas space in the upper part of the tank is reduced when the medium is drawn out of the tank. When the pressure reaches the operating negative pressure of the breathing valve, the atmosphere outside the tank will push open the negative pressure valve disc of the breathing valve, allowing the outside gas to enter the tank. This prevents the pressure inside the tank from continuing to drop and balances the pressure inside and outside the tank, thus protecting the safety device of the storage tank.

[0003] The traditional way to connect a breather valve to a storage tank is to connect it vertically from the top of the tank to the bottom of the breather valve. However, some special tanks require a side connection. Conventional breather valves cannot be directly connected to the tank from the side and require an adapter assembly, which is cumbersome and inconvenient to install. Utility Model Content

[0004] The purpose of this utility model is to provide a straight-through breather valve that can be installed in both directions to solve the problems in the prior art. The specific technical solution is as follows:

[0005] A bidirectional, straight-through breathing valve includes a valve body assembly. A left connecting pipe and a right connecting pipe are respectively provided on the left and right sides of the valve body assembly. An upper valve seat and a lower valve seat are fixedly arranged vertically inside the valve body assembly. An upper breathing valve disc assembly is slidably connected to the upper valve seat, and a lower breathing valve disc assembly is slidably connected to the lower valve seat.

[0006] Furthermore, the valve body assembly includes an outer cylinder and an inner cylinder, with the inner cylinder located inside the outer cylinder. The lower ends of the outer cylinder and the inner cylinder are fixed together by a base plate, and the upper ends of the outer cylinder and the inner cylinder are fixed together by a circular plate. The circular plate is fixedly connected to the valve cover assembly by fasteners.

[0007] Furthermore, the outer cylinder and the inner cylinder are fixedly connected by two support plates, which divide the cavity between the outer cylinder and the inner cylinder into a left cavity and a right cavity.

[0008] Furthermore, the left connecting pipe is located on the left side of the outer cylinder, and the left connecting pipe communicates with the left chamber. The end of the left connecting pipe is fixedly connected to the left flange. The right connecting pipe is located on the right side of the outer cylinder, and the right connecting pipe communicates with the right chamber. The end of the right connecting pipe is fixedly connected to the right flange.

[0009] Furthermore, the inner cylinder is provided with a first through hole, a second through hole and a third through hole. The left chamber is connected to the inside of the inner cylinder through the first through hole, and the right chamber is connected to the inside of the inner cylinder through the second through hole and the third through hole.

[0010] Furthermore, the upper valve seat and the lower valve seat are vertically fixed inside the inner cylinder. The first through hole is located between the upper valve seat and the lower valve seat, the second through hole is located on the upper side of the upper valve seat, and the third through hole is located on the lower side of the lower valve seat. The upper valve seat is provided with multiple upper channels that penetrate the upper valve seat, and the lower valve seat is provided with multiple lower channels that penetrate the lower valve seat.

[0011] Furthermore, the upper breathing valve disc assembly includes an upper breathing valve disc, a valve stem is fixed at the center of the upper breathing valve disc, the valve stem is slidably connected to the upper valve seat, and a spring is provided between the lower end of the valve stem and the inner wall of the upper valve seat.

[0012] Furthermore, the lower breathing valve disc assembly includes a lower breathing valve disc, a valve stem two is fixed at the center of the lower breathing valve disc, the valve stem two is slidably connected to the lower valve seat, and a spring two is provided between the lower end of the valve stem two and the inner wall of the lower valve seat.

[0013] Furthermore, O-rings are provided between the upper valve seat and the inner wall of the inner cylinder, and between the lower valve seat and the inner wall of the inner cylinder.

[0014] Furthermore, the valve cover assembly includes a valve cover, which is fixedly connected to the circular plate by fasteners, and a lifting lug is provided at the upper end of the valve cover.

[0015] The advantages of this utility model are:

[0016] Traditionally, the breather valve is connected to the storage tank vertically from the top of the tank to the bottom of the breather valve. However, some special storage tanks require a side connection. Conventional breather valves cannot be directly connected to the storage tank from the side and require an adapter assembly. The inlet and outlet of the breather valve in this application are located on both sides of the valve body and can be installed on the side of the storage tank according to actual needs to pressurize or depressurize the storage tank and ensure its safety.

[0017] Both the upper and lower breathing valve disc assemblies are installed inside the valve body assembly, resulting in a more compact structure. This makes the breathing valve small and space-saving, and it can be connected to the side of the tank via the left or right connecting pipe. It is suitable for use in confined spaces, tanks with insufficient load-bearing capacity, and other scenarios where it needs to be installed on the side of the tank. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the valve body assembly structure of this utility model. Figure 1 ;

[0020] Figure 3 This is a schematic diagram of the valve body assembly structure of this utility model. Figure 2 ;

[0021] Figure 4 This is a schematic diagram of the working process of the breathing valve of this utility model. Figure 1 ;

[0022] Figure 5 This is a schematic diagram of the working process of the breathing valve of this utility model. Figure 2 ;

[0023] Figure 6 This is a schematic diagram of the working process of the breathing valve of this utility model. Figure 3 ;

[0024] Figure 7 This is a schematic diagram of the working process of the breathing valve of this utility model. Figure 4 ;

[0025] Explanation of markings in the diagram:

[0026] Valve cover 1; Valve body assembly 2; Circular plate 2-1; Outer cylinder 2-2; Left connecting pipe 2-3; Left flange 2-4; Support plate 2-5; Inner cylinder 2-6; Right connecting pipe 2-7; Right flange 2-8; Base plate 2-9; First through hole 2-10; Second through hole 2-11; Third through hole 2-12; Left chamber 2-13; Right chamber 2-14; Upper breather valve disc assembly 3; O-ring 4; Fastener 5; Gasket 6; Lower breather valve disc assembly 7; Upper valve seat 8; Lower valve seat 9; Lower channel 10; Upper channel 11; Lifting lug 12. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] Example 1

[0030] like Figure 1-7 As shown, a bidirectionally installable straight-through breathing valve includes a valve body assembly 2. A left connecting pipe 2-3 and a right connecting pipe 2-7 are respectively provided on the left and right sides of the valve body assembly 2. An upper valve seat 8 and a lower valve seat 9 are arranged and fixed inside the valve body assembly 2. An upper breathing valve disc assembly 3 is slidably connected to the upper valve seat 8, and a lower breathing valve disc assembly 7 is slidably connected to the lower valve seat 9.

[0031] The working principle of the above technical solution is as follows: When the straight-through breather valve is installed with the storage tank through the left pipe 2-3, and the storage tank exhales through the breather valve, the upper valve seat 8 and the upper breather valve disc assembly 3 are in the open state, and the lower valve seat 9 and the lower breather valve disc assembly 7 are in the closed state. The gas in the storage tank enters the breather valve through the left pipe 2-3, and then exits through the upper valve seat 8 and the right pipe 2-7. When the storage tank inhales through the breather valve, the upper valve seat 8 and the upper breather valve disc assembly 3 are in the closed state, and the lower valve seat 9 and the lower breather valve disc assembly 7 are in the open state. Outside air enters the breather valve through the right pipe 2-7, and then enters the storage tank through the lower valve seat 9 and the left pipe 2-3.

[0032] When the straight-through breather valve is installed with the storage tank via the right pipe 2-7, and the storage tank exhales through the breather valve, the upper valve seat 8 and the upper breather valve disc assembly 3 are closed, while the lower valve seat 9 and the lower breather valve disc assembly 7 are open. The gas in the storage tank enters the breather valve through the right pipe 2-7, and then exits through the lower valve seat 9 and the left pipe 2-3. When the storage tank inhales through the breather valve, the upper valve seat 8 and the upper breather valve disc assembly 3 are open, while the lower valve seat 9 and the lower breather valve disc assembly 7 are closed. Outside air enters the breather valve through the left pipe 2-3, and then enters the storage tank through the upper valve seat 8 and the right pipe 2-7.

[0033] Traditionally, the breather valve is connected to the storage tank vertically from the top of the tank to the bottom of the breather valve. However, some special storage tanks require a side connection. Conventional breather valves cannot be directly connected to the storage tank from the side and require an adapter assembly. The inlet and outlet of the breather valve in this application are located on both sides of the valve body and can be installed on the side of the storage tank according to actual needs to pressurize or depressurize the storage tank and ensure its safety.

[0034] Both the upper breathing valve disc assembly 3 and the lower breathing valve disc assembly 7 are installed inside the valve body assembly 2, making the structure more compact. This makes the breathing valve small and space-saving. It can be connected to the side of the storage tank via the left pipe 2-3 or the right pipe 2-7, making it suitable for use in confined spaces, storage tanks with insufficient load-bearing capacity, and scenarios where it needs to be installed on the side of the storage tank.

[0035] Example 2

[0036] like Figure 1-7As shown, the valve body assembly 2 includes an outer cylinder 2-2 and an inner cylinder 2-6. The inner cylinder 2-6 is located inside the outer cylinder 2-2. The lower ends of the outer cylinder 2-2 and the inner cylinder 2-6 are fixed by a base plate 2-9. The upper ends of the outer cylinder 2-2 and the inner cylinder 2-6 are fixed by a circular plate 2-1. The circular plate 2-1 is fixedly connected to the valve cover assembly by fasteners 5.

[0037] The outer cylinder 2-2 and the inner cylinder 2-6 are fixedly connected by two support plates 2-5. The two support plates 2-5 divide the chamber between the outer cylinder 2-2 and the inner cylinder 2-6 into a left chamber 2-13 and a right chamber 2-14.

[0038] The left pipe 2-3 is located on the left side of the outer cylinder 2-2, and the left pipe 2-3 is connected to the left chamber 2-13. The end of the left pipe 2-3 is fixedly connected to the left flange 2-4. The right pipe 2-7 is located on the right side of the outer cylinder 2-2, and the right pipe 2-7 is connected to the right chamber 2-14. The end of the right pipe 2-7 is fixedly connected to the right flange 2-8.

[0039] The inner cylinder 2-6 is provided with a first through hole 2-10, a second through hole 2-11 and a third through hole 2-12. The left chamber 2-13 is connected to the inside of the inner cylinder 2-6 through the first through hole 2-10, and the right chamber 2-14 is connected to the inside of the inner cylinder 2-6 through the second through hole 2-11 and the third through hole 2-12.

[0040] The upper valve seat 8 and the lower valve seat 9 are vertically fixed inside the inner cylinder 2-6. The first through hole 2-10 is located between the upper valve seat 8 and the lower valve seat 9. The second through hole 2-11 is located on the upper side of the upper valve seat 8. The third through hole 2-12 is located on the lower side of the lower valve seat 9. The upper valve seat 8 is provided with multiple upper channels 11 that penetrate the upper valve seat 8. The lower valve seat 9 is provided with multiple lower channels 10 that penetrate the lower valve seat 9.

[0041] The working principle of the above technical solution is as follows: After the left pipe 2-3 is fixedly installed to the side of the storage tank through the left flange 2-4, when the gas pressure inside the storage tank is too high and exceeds the preset value, the upper breather valve disc assembly 3 is lifted. After the upper breather valve disc assembly 3 moves upward, it separates from the upper valve seat 8, and the upper channel 11 is opened. The gas inside the storage tank enters the left chamber 2-13 through the left pipe 2-3, enters the inner cylinder 2-6 through the first through hole 2-10, and enters the inner cylinder 2-6 through the upper channel 11 and the second through hole. 2-11 enters the right chamber 2-14 and is then discharged through the right pipe 2-7; when the gas pressure in the tank is too low and the gas pressure is lower than the preset value, the lower breathing valve disc assembly 7 moves upward and separates from the lower valve seat 9, the lower channel 10 is opened, and the outside gas enters the right chamber 2-14 through the right pipe 2-7, enters the inner cylinder 2-6 through the third through hole 2-12, enters the left chamber 2-13 through the lower channel 10, and is then discharged into the tank through the left pipe 2-3 to balance the pressure in the tank;

[0042] After the right pipe 2-7 is fixedly installed to the side of the storage tank via the right flange 2-8, when the gas pressure inside the storage tank is too high, the lower breather valve disc assembly 7 moves upward and separates from the lower valve seat 9, the lower channel 10 is opened, and the gas inside the storage tank enters the right chamber 2-14 through the right pipe 2-7, enters the inner cylinder 2-6 through the third through hole 2-12, enters the left chamber 2-13 through the lower channel 10, and is discharged through the left pipe 2-3; when the gas pressure inside the storage tank is too low and the gas pressure is lower than the preset value, the upper breather valve disc assembly 3 moves upward and separates from the upper valve seat 8, the upper channel 11 is opened, and the outside gas enters the left chamber 2-13 through the left pipe 2-3, enters the inner cylinder 2-6 through the first through hole 2-10, enters the right chamber 2-14 through the upper channel 11 and the second through hole 2-11, and is discharged into the storage tank through the right pipe 2-7 to balance the pressure inside the storage tank;

[0043] Generally, the opening and releasing pressures of storage tanks are different, and the weights of the upper breathing valve disc assembly 3 and the lower breathing valve disc assembly 7 are also different. The installation direction can be selected according to actual needs.

[0044] The breather valve can be connected via a flange, or the flange can be replaced with other connection methods such as quick-connect couplings, butt welding, or clamps.

[0045] Existing breather valves require additional adapter fittings, while the breather valve in this application can be directly connected to the storage tank from both sides, making the connection convenient and quick.

[0046] Example 3

[0047] like Figure 1-7 As shown, the upper breathing valve disc assembly 3 includes an upper breathing valve disc, a valve stem is fixed at the center of the upper breathing valve disc, the valve stem is slidably connected to the upper valve seat 8, and a spring is provided between the lower end of the valve stem and the inner wall of the upper valve seat 8.

[0048] The lower breathing valve disc assembly 7 includes a lower breathing valve disc, a valve stem two is fixed at the center of the lower breathing valve disc, the valve stem two is slidably connected to the lower valve seat 9, and a spring two is provided between the lower end of the valve stem two and the inner wall of the lower valve seat 9.

[0049] The working principle of the above technical solution is as follows: When the breathing valve is not exhaling or inhaling, the upper breathing valve disc is pressed tightly against the upper valve seat 8. A sealing ring is provided at the connection between the upper breathing valve disc and the upper valve seat 8 to block the upper channel 11 inside the upper valve seat 8. When there is air pressure in the upper channel 11, it pushes the upper breathing valve disc up from bottom to top, the upper channel 11 is opened, the valve stem slides with the upper valve seat 8, the spring is stretched, and the gas in the inner cylinder 2-6 is discharged from the upper channel 11. When the air pressure decreases to the preset value, under the action of the spring force, the valve stem and the upper breathing valve disc move down, and the upper breathing valve disc re-blocks the upper channel 11.

[0050] The working principle of the lower breathing valve disc assembly 7 is the same as that of the upper breathing valve disc assembly 3. When the breathing valve is not exhaling or inhaling, the lower breathing valve disc is pressed tightly against the lower valve seat 9. A sealing ring is provided at the connection between the lower breathing valve disc and the lower valve seat 9 to block the lower channel 10 in the lower valve seat 9. When there is air pressure in the lower channel 10, it pushes the lower breathing valve disc up from bottom to top, and the lower channel 10 is opened. The valve stem 2 slides with the lower valve seat 9, the spring 2 is stretched, and the gas in the inner cylinder 2-6 is discharged from the lower channel 10. When the air pressure decreases to the preset value, under the action of the spring 2, the valve stem 2 and the lower breathing valve disc move down, and the lower breathing valve disc re-blocks the lower channel 10. Since the upper breathing valve disc and the upper valve seat 8 are tightly fitted by the spring 1, and the lower breathing valve disc and the lower valve seat 9 are tightly fitted by the spring 2, the upper breathing valve disc and the lower breathing valve disc can be designed as a thin and light structure to reduce the weight of the overall breathing valve and achieve lightweight transportation and installation.

[0051] Alternatively, spring one between the lower end of the valve stem and the inner wall of the upper valve seat 8 can be removed, and spring two between the lower end of the valve stem two and the inner wall of the lower valve seat 9 can be removed. The upper and lower breathing valve discs can be designed as heavy-duty structures, or counterweights can be added to the upper and lower breathing valve discs. By relying on gravity, the upper breathing valve disc can be tightly fitted to the upper valve seat 8, and the lower breathing valve disc can be tightly fitted to the lower valve seat 9. Since spring one and spring two are eliminated, the overall breathing valve structure is simpler and easier to manufacture.

[0052] Example 4

[0053] like Figure 1-7 As shown, O-rings 4 are provided between the upper valve seat 8 and the inner wall of the inner cylinder 2-6, and between the lower valve seat 9 and the inner wall of the inner cylinder 2-6;

[0054] The working principle of the above technical solution is as follows: The O-ring 4 is made of annular rubber material with a certain elasticity, which ensures the sealing between the upper valve seat 8 and the cylinder 2-6, and ensures the sealing between the lower valve seat 9 and the cylinder 2-6.

[0055] Example 5

[0056] like Figure 1-7 As shown, the valve cover assembly includes a valve cover 1, which is fixedly connected to a circular plate 2-1 by fasteners 5, and a lifting lug 12 is provided at the upper end of the valve cover 1;

[0057] The working principle of the above technical solution is as follows: Remove fastener 5 and remove valve cover 1 from the upper end of circular plate 2-1 to inspect the inside of the breathing valve. Valve cover 1 is provided with lifting lug 12 at the upper end. The breathing valve can be lifted and moved by connecting to the lifting lug 12 with a crane.

[0058] Fastener 5 can be a locking screw.

[0059] 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 bidirectionally installable straight-through breather valve, characterized in that, It includes a valve body assembly (2), with a left pipe (2-3) and a right pipe (2-7) on the left and right sides respectively. An upper valve seat (8) and a lower valve seat (9) are fixedly arranged vertically inside the valve body assembly (2). An upper breathing valve disc assembly (3) is slidably connected to the upper valve seat (8), and a lower breathing valve disc assembly (7) is slidably connected to the lower valve seat (9).

2. A bidirectionally installable straight-through breather valve according to claim 1, characterized in that, The valve body assembly (2) includes an outer cylinder (2-2) and an inner cylinder (2-6). The inner cylinder (2-6) is located inside the outer cylinder (2-2). The lower ends of the outer cylinder (2-2) and the inner cylinder (2-6) are fixed by a base plate (2-9). The upper ends of the outer cylinder (2-2) and the inner cylinder (2-6) are fixed by a circular plate (2-1). The circular plate (2-1) is fixedly connected to the valve cover assembly by fasteners (5).

3. A bidirectionally installable straight-through breather valve according to claim 2, characterized in that, The outer cylinder (2-2) and the inner cylinder (2-6) are fixedly connected by two support plates (2-5). The two support plates (2-5) divide the chamber between the outer cylinder (2-2) and the inner cylinder (2-6) into a left chamber (2-13) and a right chamber (2-14).

4. A bidirectionally installable straight-through breather valve according to claim 3, characterized in that, The left connecting pipe (2-3) is located on the left side of the outer cylinder (2-2), and the left connecting pipe (2-3) is connected to the left chamber (2-13). The end of the left connecting pipe (2-3) is fixedly connected to the left flange (2-4). The right connecting pipe (2-7) is located on the right side of the outer cylinder (2-2), and the right connecting pipe (2-7) is connected to the right chamber (2-14). The end of the right connecting pipe (2-7) is fixedly connected to the right flange (2-8).

5. A bidirectionally installable straight-through breather valve according to claim 4, characterized in that, The inner cylinder (2-6) is provided with a first through hole (2-10), a second through hole (2-11) and a third through hole (2-12). The left chamber (2-13) is connected to the inside of the inner cylinder (2-6) through the first through hole (2-10), and the right chamber (2-14) is connected to the inside of the inner cylinder (2-6) through the second through hole (2-11) and the third through hole (2-12).

6. A bidirectionally installable straight-through breather valve according to claim 5, characterized in that, The upper valve seat (8) and the lower valve seat (9) are vertically fixed inside the inner cylinder (2-6). The first through hole (2-10) is located between the upper valve seat (8) and the lower valve seat (9). The second through hole (2-11) is located on the upper side of the upper valve seat (8). The third through hole (2-12) is located on the lower side of the lower valve seat (9). The upper valve seat (8) is provided with multiple upper channels (11) that penetrate the upper valve seat (8). The lower valve seat (9) is provided with multiple lower channels (10) that penetrate the lower valve seat (9).

7. A bidirectionally installable straight-through breather valve according to claim 6, characterized in that, The upper breathing valve disc assembly (3) includes an upper breathing valve disc, with a valve stem fixed at the center of the upper breathing valve disc. The valve stem is slidably connected to the upper valve seat (8), and a spring is provided between the lower end of the valve stem and the inner wall of the upper valve seat (8).

8. A bidirectionally installable straight-through breather valve according to claim 6, characterized in that, The lower breathing valve disc assembly (7) includes a lower breathing valve disc, a valve stem two is fixed at the center of the lower breathing valve disc, the valve stem two is slidably connected to the lower valve seat (9), and a spring two is provided between the lower end of the valve stem two and the inner wall of the lower valve seat (9).

9. A bidirectionally installable straight-through breather valve according to claim 1, characterized in that, O-rings (4) are provided between the upper valve seat (8) and the inner wall of the inner cylinder (2-6), and between the lower valve seat (9) and the inner wall of the inner cylinder (2-6).

10. A bidirectionally installable straight-through breather valve according to claim 2, characterized in that, The valve cover assembly includes a valve cover (1), which is fixedly connected to a circular plate (2-1) by fasteners (5), and a lifting lug (12) is provided at the upper end of the valve cover (1).

Images