A floating ball one-way breather valve

Abstract

This utility model belongs to the field of valve technology, specifically relating to a float-type one-way breather valve, including a valve body, a conical vent, and a float. The valve body has a hollow internal structure. A first connecting flange and a second connecting flange are fixedly installed at the upper and lower ends of the valve body, respectively. An inlet cavity is located at the bottom of the valve body and is connected to the central hole of the second connecting flange. An outlet pipe is connected to one side of the top of the valve body. The conical vent is fixedly installed inside the valve body, with its smaller end facing the inlet cavity. A sealing ring is located at the bottom of the smaller end of the conical vent, and its larger end is connected to the outlet pipe. The float is located inside the conical vent and fits snugly against the inner wall of the conical vent and the sealing ring. The diameter of the float is larger than the diameter of the smaller end of the conical vent and the diameter of the central hole of the sealing ring. This device offers excellent sealing performance, precise pressure control, strong corrosion resistance, convenient maintenance, and a simple and reliable structure.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and specifically relates to a float-type one-way breathing valve. Background Technology

[0002] In the chemical and petroleum industries, storage tanks used to store various flammable, explosive, toxic, and hazardous chemical raw materials or products are typically equipped with one-way breather valves. These valves allow for timely gas release or replenishment when pressure changes occur due to temperature variations, feeding, or discharging within the tank, maintaining pressure balance and preventing damage from overpressure or negative pressure. They also prevent leaks that could lead to safety accidents or environmental pollution. In the pharmaceutical industry, one-way breather valves ensure stable pressure and a pure gas environment within the equipment, preventing external air or impurities from entering and ensuring drug quality. In other fields, such as industrial pipeline systems requiring backflow prevention, wastewater treatment systems, and certain equipment with stringent liquid level control requirements, float-type one-way valves are used to control liquid flow and prevent backflow that could cause equipment damage or process malfunctions.

[0003] However, existing one-way breather valves have the following shortcomings: 1. Poor sealing performance: Some products use a metal float in conjunction with a common valve seat, resulting in high roughness of the sealing surface, which is prone to leakage due to wear or corrosion; 2. Low pressure control accuracy: The weight of the float is uncontrollable or inconvenient to adjust, making it impossible to adapt to the pressure requirements of different equipment; 3. Insufficient corrosion resistance: Metal parts are prone to failure in corrosive media such as acids and alkalis, shortening their service life; 4. Inconvenient maintenance: The connection structure between the valve cover and the valve body is complex, and disassembly and maintenance are time-consuming and labor-intensive. Therefore, there is an urgent need to design a float-type one-way breather valve with good sealing performance, precise pressure control, corrosion resistance, and convenient maintenance to overcome the shortcomings of existing technologies. Utility Model Content

[0004] To address the aforementioned deficiencies in the existing technology, this utility model provides a float-type one-way breathing valve, comprising a valve body, a conical air passage, and a float. The valve body has a hollow internal structure. A first connecting flange and a second connecting flange are fixedly installed at the upper and lower ends of the valve body, respectively. The bottom of the valve body has an inlet cavity, which is connected to the central hole of the second connecting flange. An outlet pipe is connected to one side of the top of the valve body. The conical air passage is fixedly installed inside the valve body, with the larger diameter end designated as the large end and the smaller diameter end designated as the small end. The small end of the conical air passage faces the inlet cavity of the valve body, and a sealing ring surface is provided at the bottom of the small end of the conical air passage. The large end of the conical air passage is connected to the outlet pipe. The float is installed inside the conical air passage, and the float is in contact with the inner wall of the conical air passage and the sealing ring surface. The diameter of the float is larger than the diameter of the small end of the conical air passage and the diameter of the central hole of the sealing ring surface.

[0005] Optionally, a suspension rope is connected to the bottom of the float, and a counterweight assembly is connected to the bottom of the suspension rope. The counterweight assembly is located in the inlet of the valve body. The counterweight assembly includes a base and multiple counterweight blocks. The base is disc-shaped, and a column and two uprights are fixed on the top of the base. The two uprights are located on the left and right sides of the column. A lifting ring is provided on the top of the column. Each counterweight block assembly includes two semi-circular counterweight blocks, and the two semi-circular counterweight blocks can be combined to form a complete circle. Each counterweight block is provided with a through hole for the upright to pass through and a through groove that matches the shape of the column.

[0006] Specifically, the opening pressure of the float one-way breather valve can be precisely set by adjusting the overall weight of the float and counterweight components according to different application requirements, so that the valve can be accurately opened and closed under specific pressure conditions, thereby effectively controlling the pressure in the equipment or pipeline.

[0007] Optionally, the height of both vertical bars is less than the height of the column.

[0008] Optionally, the diameter of the counterweight assembly is larger than the diameter of the central hole of the sealing ring surface.

[0009] Specifically, this prevents the counterweight assembly from passing through the sealing ring surface as the float rises.

[0010] Optionally, an end cap is detachably connected to the top of the first connecting flange by bolts, and a handle is provided on the top of the end cap.

[0011] Specifically, it facilitates the installation and removal of the end caps.

[0012] Optionally, the top of the conical airway is provided with a removable sealing cap. Optionally, the float is a hollow sphere made of ceramic material with a polished surface; the inner wall of the conical vent is made of ceramic material with a polished surface to form a mirror finish, and the taper is 70~80°; the sealing ring is made of polytetrafluoroethylene, which has high temperature resistance, corrosion resistance and elastic sealing properties; and the valve body is made of cast steel.

[0013] Specifically, this design enables the float-type one-way breather valve to achieve excellent sealing performance, ensuring almost no leakage when closed, thus guaranteeing the safety and stability of the equipment and system.

[0014] This invention also includes other components that enable the normal operation of a float-type one-way breather valve, all of which are conventional techniques in the art. Furthermore, any devices or components not specified in this invention employ conventional techniques in the art.

[0015] The working principle of this utility model is as follows: This float-type one-way breather valve achieves one-way ventilation by balancing the weight of the float with the pressure difference of the medium: 1. Open state: When the pressure of the medium in the storage tank or pipeline is higher than the external pressure, and the pressure difference reaches the preset opening pressure of the float, the medium pushes the float to overcome its own weight and the pulling force of the counterweight assembly and move upward along the conical venting channel. The float separates from the sealing ring surface, and the channel opens; the medium is discharged sequentially through the conical venting channel and the outlet pipe, thus reducing pressure. 2. Closed state: When the internal pressure drops below the preset opening pressure, the float falls back along the conical venting channel under the action of its own weight, the pulling force of the counterweight assembly, and the external pressure, and fits tightly against the sealing ring surface; at the same time, the float and the smooth inner wall of the conical venting channel form an auxiliary seal, preventing the backflow of external medium, air, or impurities into the system.

[0016] The beneficial effects of this utility model are: (1) Excellent sealing performance: The ceramic float and the polytetrafluoroethylene sealing ring are combined with the mirror inner wall of the conical air passage for auxiliary sealing, resulting in an extremely low leakage rate and effectively preventing backflow pollution.

[0017] (2) Precise pressure control: The opening pressure can be precisely set by adjusting the weight of the float and counterweight assembly to adapt to the pressure requirements of different equipment (such as micro-pressure balance of chemical storage tanks and high-pressure protection of oil tanks).

[0018] (3) Strong corrosion resistance: The float and the inner wall of the conical air passage are made of ceramic material, and the sealing ring is made of polytetrafluoroethylene, which can withstand corrosive media such as acids, alkalis and oils, and extend the service life.

[0019] (4) Easy maintenance: The end cap is connected by bolts and equipped with a handle. The top of the conical air passage is equipped with a removable sealing cap, which is easy to disassemble and can quickly inspect or replace core components such as float, counterweight components, and sealing ring.

[0020] (5) Simple and reliable structure: Due to fewer parts and no complex mechanical transmission components, the manufacturing process is relatively simple and the cost is low. It is also easy to install, maintain and repair, with a low failure rate, which reduces the cost of use and maintenance and makes it easy to scale up production. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the counterweight component of this utility model.

[0024] Figure 3 for Figure 2 Exploded view.

[0025] Figure 4 This is a schematic diagram of the structure of a float-type one-way breather valve in the open state, as provided in the embodiment.

[0026] In the diagram: 1. Valve body, 2. Conical vent, 3. Float, 4. First connecting flange, 5. Second connecting flange, 6. End cap, 7. Handle, 8. Inlet chamber, 9. Outlet pipe, 10. Sealing ring, 11. Sealing cap, 12. Lifting rope, 13. Counterweight assembly, 14. Base, 15. Column, 16. Upright, 17. Lifting ring, 18. Counterweight block, 19. Through hole, 20. Through groove. Detailed Implementation

[0027] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.

[0028] Example like Figure 1-4 As shown, this utility model embodiment provides a float-type one-way breathing valve, including a valve body 1, a conical air passage 2, and a float 3. The valve body 1 has a hollow internal structure. A first connecting flange 4 and a second connecting flange 5 are fixedly installed at the upper and lower ends of the valve body 1, respectively. An end cap 6 is detachably connected to the top of the first connecting flange 4 by bolts. A handle 7 is provided on the top of the end cap 6 to facilitate the installation and removal of the end cap 6. An inlet cavity 8 is provided at the bottom of the valve body 1, and the inlet cavity 8 is connected to the center hole of the second connecting flange 5. An outlet pipe 9 is connected to one side of the top of the valve body 1. The conical air passage 2 is fixedly installed at... Inside the valve body 1, the larger diameter end of the conical vent 2 is designated as the large end, and the smaller diameter end is designated as the small end. The small end of the conical vent 2 faces the inlet cavity 8 of the valve body 1, and a sealing ring surface 10 is provided at the bottom of the small end of the conical vent 2. The large end of the conical vent 2 is connected to the outlet pipe 9, and a removable sealing cover 11 is provided at the top of the conical vent 2. The float 3 is located inside the conical vent 2, and the float 3 is in contact with the inner wall of the conical vent 2 and the sealing ring surface 10. The diameter of the float 3 is larger than the diameter of the small end of the conical vent 2 and the diameter of the central hole of the sealing ring surface 10.

[0029] A suspension rope 12 is connected to the bottom of the float 3, and a counterweight assembly 13 is connected to the bottom of the suspension rope 12. The counterweight assembly 13 is located in the inlet cavity 8 of the valve body 1. The counterweight assembly 13 includes a base 14 and multiple counterweight block groups. The base 14 is disc-shaped. A column 15 and two uprights 16 are fixed on the top of the base 14, and the two uprights 16 are located on the left and right sides of the column 15. A lifting ring 17 is provided on the top of the column 15. The height of the two uprights is less than the height of the column 15. Each counterweight block group includes two semi-circular counterweight blocks 18, and the two semi-circular counterweight blocks 18 can be combined to form a complete circle. Each counterweight block 18 is provided with a through hole 19 for the uprights 16 to pass through, and a through groove 20 that matches the shape of the column 15. The diameter of the counterweight block group is larger than the diameter of the central hole of the sealing ring surface 10 to prevent the counterweight assembly 13 from passing through the sealing ring surface 10 as the float 3 rises.

[0030] Understandably, depending on different application requirements, the opening pressure of the float one-way breather valve can be precisely set by adjusting the overall weight of the float 3 and the counterweight assembly 13, so that the valve can be accurately opened and closed under specific pressure conditions, thereby effectively controlling the pressure in the equipment or pipeline. In addition, the float 3 is a hollow sphere made of ceramic material with a polished surface; the inner wall of the conical vent 2 is made of ceramic material with a polished surface to form a mirror finish, and the taper is 80°; the sealing ring 10 is made of polytetrafluoroethylene, which has high temperature resistance, corrosion resistance and elastic sealing properties; the valve body 1 is made of cast steel.

[0031] Understandably, this design enables the float-type one-way breather valve to achieve good sealing performance, ensuring almost no leakage when closed, thus guaranteeing the safety and stability of the equipment and system.

[0032] The working principle of this utility model is as follows: This float-type one-way breather valve achieves one-way ventilation by "balancing the weight of the float 3 with the pressure difference of the medium": 1. Open state: When the pressure of the medium in the storage tank or pipeline is higher than the external pressure, and the pressure difference reaches the preset opening pressure of the float 3, the medium pushes the float 3 to overcome its own weight and the pulling force of the counterweight component 13 and move upward along the conical venting channel 2. The float 3 separates from the sealing ring surface 10, and the channel opens; the medium is discharged sequentially through the conical venting channel 2 and the outlet pipe 9, thereby reducing the pressure. 2. Closed state: When the internal pressure drops below the preset opening pressure, the float 3 falls back along the conical venting channel 2 under the action of its own weight, the pulling force of the counterweight component 13, and the external pressure, and fits tightly against the sealing ring surface 10; at the same time, the float 3 and the smooth inner wall of the conical venting channel 2 form an auxiliary seal, preventing the external medium, air, or impurities from flowing back into the system.

[0033] The embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A float-type one-way breathing valve, comprising a valve body, a conical air passage, and a float, characterized in that: The valve body has a hollow internal structure. A first connecting flange and a second connecting flange are fixedly installed at the upper and lower ends of the valve body, respectively. The bottom of the valve body has an inlet cavity, which is connected to the central hole of the second connecting flange. An outlet pipe is connected to one side of the top of the valve body. A conical vent is fixedly installed inside the valve body. The small end of the conical vent faces the inlet cavity of the valve body, and a sealing ring surface is provided at the bottom of the small end of the conical vent. The large end of the conical vent is connected to the outlet pipe. A float is installed inside the conical vent, and the float fits against the inner wall of the conical vent and the sealing ring surface. The diameter of the float is larger than the diameter of the small end of the conical vent and the diameter of the central hole of the sealing ring surface.

2. The float-type one-way breather valve according to claim 1, characterized in that: A suspending rope is connected to the bottom of the float, and a counterweight assembly is connected to the bottom of the suspending rope. The counterweight assembly includes a base and multiple counterweight blocks. The base is disc-shaped, and a column and two uprights are fixed on the top of the base. The two uprights are located on the left and right sides of the column. A lifting ring is provided on the top of the column. Each counterweight block assembly includes two semi-circular counterweight blocks. Each counterweight block is provided with a through hole for the upright to pass through and a through groove that matches the shape of the column.

3. The float-type one-way breather valve according to claim 2, characterized in that: The height of both vertical poles is less than the height of the column.

4. The float-type one-way breather valve according to claim 3, characterized in that: The diameter of the counterweight assembly is larger than the diameter of the central hole of the sealing ring.

5. The float-type one-way breather valve according to claim 1, characterized in that: The top of the first connecting flange is detachably connected to an end cap by bolts, and a handle is provided on the top of the end cap.

6. The float-type one-way breather valve according to claim 1, characterized in that: The top of the conical ventilation duct is equipped with a sealing cap.

7. The float-type one-way breather valve according to claim 1, characterized in that: The float is a hollow sphere made of ceramic, the inner wall of the conical vent is made of ceramic, the sealing ring is made of polytetrafluoroethylene, and the valve body is made of cast steel.

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