A cylinder breather valve

Abstract

The utility model discloses a kind of steel bottle breather valve, including valve body, the valve body is composed of thick pipe and thin pipe, the thin pipe is welded in the top of thick pipe, the thin pipe and thick pipe are communicated by vertical hole, the left and right two sides inner wall of thin pipe is equipped with first thread layer, the lower half portion outer wall of thick pipe is circular, the upper half portion outer wall of thick pipe is hexagonal;Pressure stabilizing assembly, the pressure stabilizing assembly includes baffle ring, vertical cylinder, multiple connecting rods, fixed block, closure plate, limit ring, moving rod and sliding sleeve, the baffle ring is welded on the inner wall of thick pipe, the vertical cylinder is located in thick pipe, one end of multiple connecting rods is fixedly connected on the inner wall of vertical cylinder.The utility model is provided with pressure stabilizing assembly and pressure relief assembly, so as to guarantee that the pressure in steel bottle is same with external pressure, avoid steel bottle to form high pressure or mortgage environment, and it is convenient to disassemble pressure stabilizing assembly and pressure relief assembly to replace or maintain.

Description

Technical Field

[0001] This utility model relates to the field of breathing valve technology, and in particular to a gas cylinder breathing valve. Background Technology

[0002] In industrial production and material storage, sealed containers such as steel cylinders are widely used to store various liquid or gaseous media. However, during use, the internal pressure of sealed containers fluctuates frequently due to factors such as changes in medium temperature and the input and output of the medium. When a medium is injected into the container (such as adding oil to an oil cylinder), the space inside the cylinder is occupied by the medium, and the pressure decreases accordingly. If external air is not replenished in time, a negative pressure will form inside the container, which may cause the container wall to collapse due to the excessive pressure difference between the inside and outside, and in severe cases, even damage to the container structure. Conversely, when the temperature of the medium inside the container rises or the internal pressure rises for other reasons, if the excess pressure cannot be released in time, a positive pressure will form inside the container. If this pressure exceeds the container's bearing capacity, the container will rupture, causing media leakage, explosions, and other safety accidents.

[0003] To address the aforementioned pressure imbalance issue, the industry has gradually begun using breather valves as a key component for balancing the internal and external pressure of sealed containers. While traditional breather valves can achieve pressure regulation to some extent, they have revealed several shortcomings during long-term use. On the one hand, some breather valves lack sufficient pressure balance response; when the internal pressure changes rapidly, they cannot promptly open or close the ventilation channels, resulting in delayed pressure balance and a continued risk of container damage. On the other hand, traditional breather valves have weak impurity protection capabilities. When drawing in external air, dust, particles, and other impurities in the air can easily enter the container with the airflow, contaminating the stored medium and affecting its quality. This is especially problematic for containers storing high-purity media, such as oil cylinders, where contamination directly reduces the usability of the medium and increases subsequent processing costs.

[0004] Therefore, a gas cylinder breather valve needs to be designed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a gas cylinder breather valve. This invention, through the setting of a pressure stabilizing component and a pressure relief component, can ensure that the pressure inside the gas cylinder is the same as the external pressure, avoid the formation of a high-pressure or confined environment in the gas cylinder, and facilitate the disassembly and replacement or maintenance of the pressure stabilizing component and the pressure relief component.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A gas cylinder breathing valve includes a valve body composed of a thick tube and a thin tube. The thin tube is welded to the upper part of the thick tube, and the thin tube and the thick tube are connected through a vertical hole. The inner walls of both sides of the thin tube are provided with a first thread layer. The lower half of the outer wall of the thick tube is circular, and the upper half of the outer wall of the thick tube is hexagonal. A pressure stabilizing assembly includes a retaining ring, a vertical cylinder, multiple connecting rods, a fixing block, a sealing plate, a limiting ring, a moving rod, and a sliding sleeve. The retaining ring is welded to the inner wall of the thick tube. The vertical cylinder is located inside the thick tube. One end of each of the multiple connecting rods is fixedly connected to the inner wall of the vertical cylinder, and the other end is fixedly connected to the fixing block. The sliding sleeve is fixedly connected to the lower end of the fixing block. The moving rod is fixedly connected to the sealing plate and slidably connected inside the sliding sleeve. The fixing block and the sealing plate are elastically connected by a second spring. The limiting ring is fixedly connected to the inner wall of the vertical cylinder, and the sealing plate is located above the limiting ring.

[0008] Preferably, the lower end of the thick tube is fitted with a protective sleeve, and the protective sleeve has multiple air holes.

[0009] Preferably, the vertical cylinder, multiple connecting rods, fixing block, sealing plate, limiting ring, moving rod, and sliding sleeve are all made of plastic. The vertical cylinder, multiple connecting rods, fixing block, sliding sleeve, and limiting ring are integrally formed. The sealing plate and moving rod are integrally formed. The radius of the sealing plate is larger than the inner diameter of the limiting ring and smaller than the inner diameter of the vertical cylinder.

[0010] Preferably, the inner wall of the thick tube is provided with an annular groove, and an annular hoop is provided in the annular groove, with the annular hoop located below the vertical tube.

[0011] Preferably, the thin tube is provided with a pressure relief assembly, which includes a piston plate, a pull rod, and a connecting tube. The piston plate is slidably and sealingly connected to the inner wall of the thin tube. The pull rod is fixedly connected to the piston plate. The right end of the pull rod passes through the connecting tube. The pull rod is elastically connected to the right inner wall of the connecting tube by a first spring. The outer wall of the connecting tube is provided with a second threaded layer. The second threaded layer is threadedly engaged with the first threaded layer located on the right side. Pressure relief holes communicating with the outside are provided on both the front and rear sides of the thin tube. A stop block is fixedly connected inside the thin tube. The stop block is provided with a round opening.

[0012] Preferably, the right end of the thin tube is fitted with an installation sleeve, the pull rod passes through the installation sleeve, the pull rod is provided with an installation hole, a hanging ring is suspended in the installation hole, and a hexagonal nut is threaded onto the second threaded layer.

[0013] Compared with existing technologies, the advantages of this device are:

[0014] 1. Compared with existing technologies, this breathing valve has a more sensitive air pressure balance response and features dual pressure regulation protection, which can more effectively prevent damage to the container due to air pressure imbalance. On the one hand, the pressure stabilizing component, through the cooperation of the second spring, the moving rod, and the sliding sleeve, can push the sealing plate up and down in real time according to the air pressure changes inside the container, quickly opening or closing the ventilation channel, thus solving the problem of lag in air pressure balance in traditional breathing valves. On the other hand, the pressure relief component in the thin tube can quickly release excess pressure by compressing the first spring and opening the pressure relief hole through the piston plate when a sudden high pressure occurs inside the container. Together with the pressure stabilizing component, it forms a dual protection, further improving the stability and safety of air pressure regulation.

[0015] 2. Compared with existing technologies, this breather valve has stronger impurity protection capabilities and better material compatibility, effectively ensuring the quality of the medium inside the container and extending its service life. The protective sleeve at the lower end of the thick tube has multiple air holes, which can filter dust, particles and other impurities when drawing in external air, avoiding the problem of impurities entering the contaminated medium in traditional breather valves; at the same time, the core components of the pressure stabilizing assembly are all made of plastic material in one piece, which not only makes it lightweight and reduces the load on the container, but also avoids the defects of metal materials being prone to corrosion, making it especially suitable for scenarios involving humid or corrosive media, greatly reducing the frequency of maintenance and replacement and the cost of use;

[0016] 3. Compared with the existing technology, the thin tube can be flexibly disassembled by the first thread layer and the second thread layer of the connecting tube. The hexagonal nut is easy to fix and adjust. At the same time, the ring clamp is easy to disassemble the pressure stabilizing component. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a gas cylinder breather valve proposed in this utility model;

[0018] Figure 2 for Figure 1 A half-section view;

[0019] Figure 3 This is a schematic diagram of the pressure relief assembly.

[0020] Figure 4 This is a schematic diagram of the voltage regulator component.

[0021] In the diagram: 1 Valve body, 2 Protective sleeve, 3 Mounting sleeve, 4 Hanging ring, 5 Pull rod, 6 Pressure relief hole, 7 Connecting pipe, 8 First spring, 9 Piston plate, 10 Stop block, 11 Stop ring, 12 Vertical cylinder, 13 Connecting rod, 14 Fixing block, 15 Second spring, 16 Sealing plate, 17 Limiting ring, 18 Hexagonal nut, 19 Moving rod, 20 Sliding sleeve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-4 A gas cylinder breathing valve includes a valve body 1, which is composed of a thick tube and a thin tube. The thin tube is welded above the thick tube and the thin tube and the thick tube are connected through a vertical hole. The inner walls of both sides of the thin tube are provided with a first thread layer. The first thread layer on the left side is used to connect with the gas pipe on the gas cylinder. The first thread layer is an internal thread structure. The thread profile adopts a standard triangular thread. The thread surface is treated with anti-rust treatment, which can improve the stability and service life of the connection with external parts. The outer wall of the lower half of the thick tube is circular and the outer wall of the upper half of the thick tube is hexagonal.

[0024] The voltage stabilizing assembly includes a retaining ring 11, a vertical cylinder 12, multiple connecting rods 13, a fixing block 14, a sealing plate 16, a limiting ring 17, a moving rod 19, and a sliding sleeve 20. The retaining ring 11 is welded to the inner wall of the thick pipe. The retaining ring 11 has a ring structure, and its welding position is located in the middle area of ​​the inner wall of the thick pipe. The preferred surface of the retaining ring 11 can limit the vertical cylinder 12, preventing the vertical cylinder 12 from shifting upward during assembly or use. The vertical cylinder 12 is located inside the thick pipe. One end of the multiple connecting rods 13 is fixedly connected to the inner wall of the vertical cylinder 12, and the other end is fixedly connected to the fixing block 14. The sliding sleeve 20 is fixedly connected to the lower end of the fixing block 14. The moving rod 19 is fixedly connected to the sealing plate 16 and slidably connected inside the sliding sleeve 20. The fixing block 14 and the sealing plate 16 are elastically connected by a second spring 15. The limiting ring 17... 7 is fixedly connected to the inner wall of the vertical cylinder 12, and the sealing plate 16 is located above the limiting ring 17. The limiting ring 17 is an annular protrusion structure, which restricts the downward movement of the sealing plate 16 and prevents the sealing plate 16 from moving excessively downward due to the force of the second spring 15 and leaving the effective sealing range of the vertical cylinder 12. At the same time, it can ensure that the sealing plate 16 can accurately fit with the bottom opening of the vertical cylinder 12 when it is reset, so as to achieve a reliable seal. The inner wall of the thick pipe is provided with an annular groove, and an annular hoop is provided in the annular groove. The annular hoop is located below the vertical cylinder 12. The annular hoop is made of elastic metal or hard plastic. The outer diameter of the annular hoop is matched with the inner diameter of the annular groove. After the annular hoop is installed in the annular groove, its upper end face is in close contact with the lower end face of the vertical cylinder 12, which can play an auxiliary support role for the vertical cylinder 12 and further prevent the vertical cylinder 12 from shaking or shifting during use.

[0025] The lower end of the thick tube is fitted with a protective sleeve 2, which is made of elastic and wear-resistant material. Its inner wall fits tightly with the outer wall of the lower end of the thick tube and can be fixed by interference fit. The protective sleeve 2 has multiple air holes, which are evenly distributed on the side wall and bottom of the protective sleeve 2. The size of the air holes can effectively filter dust, sand and other impurities in the air, while ensuring sufficient airflow to meet the airflow requirements during negative pressure air replenishment.

[0026] Among them, the vertical cylinder 12, multiple connecting rods 13, fixing block 14, sealing plate 16, limiting ring 17, moving rod 19 and sliding sleeve 20 are all made of plastic. The plastic material used is high-strength engineering plastic, which has good corrosion resistance, aging resistance and a certain degree of elasticity. It can adapt to the complex environment of oil cylinders, storage cylinders and other scenarios, and avoid the problem of easy corrosion of metal materials. The vertical cylinder 12, multiple connecting rods 13, fixing block 14, sliding sleeve 20 and limiting ring 17 are integrally processed and formed. The sealing plate 16 and the moving rod 19 are integrally processed and formed. The radius of the sealing plate 16 is larger than the inner diameter of the limiting ring 17 and smaller than the inner diameter of the vertical cylinder 12.

[0027] The thin tube contains a pressure relief assembly, which includes a piston plate 9, a pull rod 5, and a connecting pipe 7. A sealing ring made of oil-resistant and aging-resistant rubber is provided on the outer peripheral wall of the piston plate 9. This sealing ring tightly fits the inner wall of the thin tube, effectively preventing airflow leakage from the gap between the piston plate 9 and the inner wall of the thin tube, ensuring the sealing and precise pressure regulation during the pressure relief process. The piston plate 9 is slidably connected to the inner wall of the thin tube. The pull rod 5 is fixedly connected to the piston plate 9. The right end of the pull rod 5 passes through the connecting pipe 7. The right end wall of the connecting pipe 7 has a through hole for the pull rod 5 to pass through. A small gap is left between the inner wall of the through hole and the pull rod 5, which does not affect the left and right movement of the pull rod 5 but also guides the pull rod 5, preventing it from deviating during movement. The pull rod 5 is elastically connected to the right inner wall of the connecting pipe 7 by a first spring 8. The outer wall of the connecting pipe 7 has a second thread. The second threaded layer engages with the first threaded layer on the right side. This threaded connection facilitates the assembly and disassembly of the pressure relief component and the thin tube. When the pressure relief component malfunctions, it can be quickly repaired or replaced by loosening the connecting tube 7, improving maintenance efficiency. Both the front and rear sides of the thin tube have pressure relief holes 6 that communicate with the outside. A stop block 10 is fixedly connected inside the thin tube, and the stop block 10 has a round opening. An installation sleeve 3 is fitted on the right end of the thin tube. The pull rod 5 passes through the installation sleeve 3 and has an installation hole. A hanging ring 4 is suspended in the installation hole. The hanging ring 4 allows the operator to pull the pull rod 5 manually for emergency pressure relief using tools such as hooks. A hexagonal nut 18 is threaded onto the second threaded layer. The hexagonal nut 18 can lock the connecting tube 7 to prevent it from loosening due to vibration or other factors during use, ensuring the stability of the connection between the pressure relief component and the thin tube.

[0028] The functional principle of this utility model can be explained through the following operation: When a sealed container (such as an oil cylinder) outputs a medium (such as oil extraction) or when the internal air pressure drops due to a decrease in temperature, forming a negative pressure, the external atmospheric pressure will push the airflow into the container. At this time, the airflow first contacts the protective sleeve 2 at the lower end of the thick pipe in the valve body 1. The multiple air holes on the protective sleeve 2 can filter dust, particles and other impurities in the airflow, preventing impurities from entering the container and contaminating the medium. Subsequently, the airflow acts on the sealing plate 16 in the pressure stabilizing component, overcoming the elastic force of the second spring 15, and pushing the sealing plate 16 to move upward along the inner wall of the vertical cylinder 12.

[0029] When the sealing plate 16 moves upward, the bottom opening of the vertical cylinder 12 is opened. The filtered external airflow passes sequentially through the air hole of the protective sleeve 2, the inside of the thick pipe, the inside of the vertical cylinder 12, and the round opening on the baffle 10, finally entering the sealed container to replenish the gas capacity inside the container until the gas pressure inside and outside the container tends to be balanced. At this time, the elastic force of the second spring 15 returns to normal, pushing the sealing plate 16 downward to reset, resealing the bottom opening of the vertical cylinder 12, stopping the gas replenishment, and preventing the continuous entry of external airflow from causing the gas pressure inside the container to become too high.

[0030] When the pressure inside the sealed container increases (including the normal positive pressure caused by the increase in medium temperature and the injection of medium, as well as the sudden high pressure caused by the violent reaction of the medium and the sudden increase in temperature), the high-pressure airflow inside the container directly enters the thin tube of the valve body 1. The piston plate 9 inside the thin tube is subjected to the pressure of the airflow and moves to the right against the elastic force of the first spring 8. As the piston plate 9 moves to the right, when the piston plate 9 moves to the position of disengaging from the pressure relief holes 6 on both sides of the thin tube, the high-pressure airflow inside the thin tube is directly discharged to the outside through the pressure relief holes 6, realizing the release of the air pressure inside the container. When the air pressure inside and outside the container returns to equilibrium, the first spring 8 pushes the piston plate 9 to the left to reset, re-sealing the pressure relief holes 6, completing the normal positive pressure relief.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A gas cylinder breather valve, characterized in that, include: The valve body (1) is composed of a thick tube and a thin tube. The thin tube is welded above the thick tube. The thin tube and the thick tube are connected through a vertical hole. The inner walls of the left and right sides of the thin tube are provided with a first thread layer. The outer wall of the lower half of the thick tube is circular, and the outer wall of the upper half of the thick tube is hexagonal. The voltage stabilizing assembly includes a retaining ring (11), a vertical cylinder (12), multiple connecting rods (13), a fixing block (14), a sealing plate (16), a limiting ring (17), a moving rod (19), and a sliding sleeve (20). The retaining ring (11) is welded to the inner wall of the thick pipe. The vertical cylinder (12) is located inside the thick pipe. One end of the multiple connecting rods (13) is fixedly connected to the inner wall of the vertical cylinder (12), and the other end is fixedly connected to the fixing block (14). The sliding sleeve (20) is fixedly connected to the lower end of the fixing block (14). The moving rod (19) is fixedly connected to the sealing plate (16) and slidably connected inside the sliding sleeve (20). The fixing block (14) and the sealing plate (16) are elastically connected by a second spring (15). The limiting ring (17) is fixedly connected to the inner wall of the vertical cylinder (12), and the sealing plate (16) is located above the limiting ring (17).

2. The gas cylinder breather valve according to claim 1, characterized in that: The lower end of the thick tube is fitted with a protective sleeve (2), and the protective sleeve (2) has multiple air holes.

3. A gas cylinder breather valve according to claim 1, characterized in that: The vertical cylinder (12), multiple connecting rods (13), fixing block (14), sealing plate (16), limiting ring (17), moving rod (19) and sliding sleeve (20) are all made of plastic. The vertical cylinder (12), multiple connecting rods (13), fixing block (14), sliding sleeve (20) and limiting ring (17) are integrally formed. The sealing plate (16) and moving rod (19) are integrally formed. The radius of the sealing plate (16) is larger than the inner diameter of the limiting ring (17) and smaller than the inner diameter of the vertical cylinder (12).

4. A gas cylinder breather valve according to claim 1, characterized in that: The inner wall of the thick tube is provided with an annular groove, and an annular hoop is provided in the annular groove. The annular hoop is located below the vertical tube (12).

5. A gas cylinder breather valve according to claim 1, characterized in that: The thin tube is equipped with a pressure relief assembly, which includes a piston plate (9), a pull rod (5), and a connecting pipe (7). The piston plate (9) is slidably connected to the inner wall of the thin tube. The pull rod (5) is fixedly connected to the piston plate (9). The right end of the pull rod (5) passes through the connecting pipe (7). The pull rod (5) is elastically connected to the right inner wall of the connecting pipe (7) by a first spring (8). The outer wall of the connecting pipe (7) is provided with a second thread layer. The second thread layer is threadedly engaged with the first thread layer located on the right side. Pressure relief holes (6) communicating with the outside are provided on both the front and rear sides of the thin tube. A stop block (10) is fixedly connected inside the thin tube. The stop block (10) is provided with a round opening.

6. A gas cylinder breather valve according to claim 5, characterized in that: The right end of the thin tube is fitted with an installation sleeve (3), the pull rod (5) passes through the installation sleeve (3), the pull rod (5) is provided with an installation hole, a hanging ring (4) is suspended in the installation hole, and a hexagonal nut (18) is threaded on the second thread layer.

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