Breather valve for keeping pressure balance of storage tank
By using plastic materials to make a breathing valve, and setting a negative and positive pressure valve seat in the valve body, and using the guide rod sleeve and guide rod to cooperate, the problem of the positive pressure valve disc of the non-metallic breathing valve is easily opened, achieving the air pressure balance inside and outside the storage tank and improving corrosion resistance.
Patent Information
- Application Number
- CN202422302028.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-20
AI Technical Summary
When existing breathing valves are made of non-metallic materials, the positive pressure valve plate is easily pushed open by the pressure inside the storage tank, resulting in seal failure and one-way conduction damage.
The valve body and valve cover are made of plastic materials, and a negative pressure valve seat and a positive pressure valve seat are installed in the valve body. The diameter of the positive pressure valve plate is greater than the inner diameter of the suction channel. The guide rod sleeve and the guide rod are used in conjunction to ensure that the positive pressure valve plate moves upward under the action of atmospheric pressure and supplement the pressure in the storage tank.
It effectively improves the corrosion resistance of the breathing valve, ensures the balance of air pressure inside and outside the storage tank, and avoids seal failure and one-way conduction damage.
Smart Images
Figure CN223035795U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of breathing valves, in particular to a breathing valve for maintaining the pressure balance of a storage tank. Background Technique
[0002] A breathing valve is a safe and energy-saving product for maintaining the air pressure balance of a storage tank and reducing the volatilization of the medium. The breathing valve is generally installed on the top of the storage tank and is usually made of metal materials. Inside, the positive and negative pressure valve discs and metal parts cover the positive and negative pressure valve seats for sealing to achieve the one-way conduction function. However, due to the complex liquid components in the storage tank, there is a possibility of corrosion even for alloys. Therefore, in the prior art, non-metallic materials are also used to make breathing valves. However, if the positive pressure valve disc made of non-metallic material is covered in the same way as the metal material, it is very easy to be pushed open by the pressure in the storage tank when replenishing the medium into the tank, resulting in seal failure and destroying the one-way conduction. Content of the Utility Model
[0003] The purpose of the utility model is to provide a breathing valve for maintaining the pressure balance of a storage tank to solve the problems put forward in the above background technique.
[0004] To achieve the above purpose, the utility model provides the following technical solution: A breathing valve for maintaining the pressure balance of a storage tank, including a valve body and a valve cover made of plastic. The bottom of the valve body is provided with a ventilation port for communicating with the storage tank. Inside the valve body, there are a negative pressure valve seat and a positive pressure valve seat. A groove is opened in the middle of the negative pressure valve seat, and a negative pressure valve disc is arranged in the groove. An inhalation channel and an exhalation channel are arranged on the side of the valve body. The inhalation channel penetrates through the negative pressure valve seat and communicates with the groove. The diameter of the negative pressure valve disc is larger than the inner diameter of the inhalation channel. The exhalation channel is located above the positive pressure valve seat. A through hole is opened in the middle of the positive pressure valve seat, and a positive pressure valve disc is arranged above the through hole. A guide rod is connected to the middle of the positive pressure valve disc, and a through hole corresponding to the guide rod is opened at the top of the valve body.
[0005] In the present application, the following improvement is made: A guide rod sleeve is arranged outside the through hole inside the valve body. The guide rod sleeve that plays a positioning role ensures that the guide rod can drive the negative pressure valve disc to move in the up and down directions rather than the left and right directions, preventing the negative pressure valve disc from being misaligned with the through hole and affecting the seal.
[0006] In the present application, the following improvement is made: The valve cover is fixedly installed on the top of the valve body through bolts, and a protrusion is embedded in the middle of the valve cover. A through groove corresponding to the guide rod sleeve is opened at the bottom of the protrusion.
[0007] In the present application, the following improvement is made: A retaining strip runs horizontally across the top end of the inner wall of the groove, and the retaining strip is integrally formed with the negative pressure valve seat.
[0008] In the solution of the present application, the following improvements are made. A connecting flange one is sleeved on the outer end of the exhalation channel.
[0009] In the solution of the present application, the following improvements are made. The inhalation channel located outside the valve body is arranged in an arc structure, and the opening of the inhalation channel faces downward. The inlet end of the inhalation channel is arranged in an arc structure and the opening faces downward, which is more conducive to gas flow.
[0010] In the solution of the present application, the following improvements are made. A connecting flange two is sleeved on the outer end of the ventilation port.
[0011] Compared with the prior art, the present utility model provides a breather valve for maintaining the pressure balance of a storage tank, which has the following beneficial effects:
[0012] By using a plastic material to replace the traditional metal material, the corrosion resistance of the breather valve is effectively improved, enabling it to be applicable to various medium working conditions and eliminating limitations. By arranging the positive pressure valve disc inside the positive pressure valve seat and making the diameter of the positive pressure valve disc larger than the inner diameter of the inhalation channel, the positive pressure valve disc abuts against the outlet end of the inhalation channel to form a seal. When the medium is pumped out of the storage tank, the gas pressure in the upper part of the tank will decrease. When the operating negative pressure of the breather valve is reached, the positive pressure valve disc moves upward under the action of atmospheric pressure, and the outside air enters the valve body through the inhalation channel to supplement the pressure in the storage tank, achieving the pressure balance inside and outside the tank. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a cross-sectional view of the present utility model.
[0014] In the figure: 1. Valve body; 11. Ventilation port; 12. Inhalation channel; 13. Exhalation channel; 14. Through hole; 2. Valve cover; 21. Protrusion; 22. Through groove; 3. Negative pressure valve seat; 31. Groove; 32. Negative pressure valve disc; 33. Stop bar; 4. Positive pressure valve seat; 41. Positive pressure valve disc; 42. Guide rod; 5. Guide rod sleeve; 6. Connecting flange one; 7. Connecting flange two. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] The following will describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model:
[0016] As Figure 1 shown, a breather valve for maintaining the pressure balance of a storage tank mainly consists of a valve body 1 and a valve cover 2. Both the valve body 1 and the valve cover 2 are made of plastic materials, preferably PP (polypropylene), UPVC, and PPH. And the valve cover 2 is fixedly installed on the top of the valve body 1 through bolts. A ventilation port 11 for connecting the storage tank is provided at the bottom of the valve body 1, and a connecting flange two 7 is sleeved on the outer end of the ventilation port 11. The valve body 1 is installed on the top of the storage tank through the connecting flange two 7.
[0017] Inside the valve body 1, a negative pressure valve seat 3 and a positive pressure valve seat 4 are provided. The positive pressure valve seat 4 is located above the negative pressure valve seat 3. An inhalation channel 12 and an exhalation channel 13 are provided on the side of the valve body 1. The inhalation channel 12 located outside the valve body 1 is arranged in an arc-shaped structure, and the opening of the inhalation channel 12 faces downward. The exhalation channel 13 is located above the positive pressure valve seat 4, and a connecting flange 6 is sleeved on the outer end of the exhalation channel 13. A groove 31 is opened in the middle of the negative pressure valve seat 3. A negative pressure valve disc 32 is provided in the groove 31. At the same time, a stop bar 33 runs across the top of the inner wall of the groove 31. The stop bar 33 is integrally formed with the negative pressure valve seat 3 to limit the negative pressure valve disc 32 to prevent it from falling out of the groove and into the valve body 1. The inhalation channel 12 penetrates through the negative pressure valve seat 3 and communicates with the groove 31. The diameter of the negative pressure valve disc 32 is larger than the inner diameter of the inhalation channel 12, and the negative pressure valve disc 32 abuts against the outlet end of the inhalation channel 12 to form a seal. A through hole is opened in the middle of the positive pressure valve seat 4. A positive pressure valve disc 41 is provided above the through hole. The diameter of the positive pressure valve disc 41 is larger than the diameter of the through hole. The positive pressure valve disc 41 abuts against the through hole to form a seal. A guide rod 42 is connected to the middle of the positive pressure valve disc 41. At the same time, a through hole 14 corresponding to and cooperating with the guide rod 42 is opened at the top of the valve body 1. A guide rod sleeve 5 is provided outside the through hole 14 inside the valve body 1. A protrusion 21 is embedded in the middle of the valve cover 2, and a through groove 22 corresponding to and cooperating with the guide rod sleeve 5 is opened at the bottom of the protrusion 21.
[0018] Working principle: When the pressure of the medium in the tank is within the control operating pressure range of the breather valve, the breather valve does not work to maintain the tightness of the storage tank;
[0019] When replenishing the medium into the tank, the pressure in the upper gas space of the tank increases. When it reaches the operating positive pressure of the breather valve, the positive pressure valve disc 41 is pushed open under the action of the pressure in the storage tank, and the gas is discharged from the exhalation channel 13, so that the pressure in the tank does not continue to increase;
[0020] When pumping out the medium from the storage tank, the pressure of the upper gas in the tank will decrease. When it reaches the operating negative pressure of the breather valve, the negative pressure valve disc 32 moves upward under the action of the atmospheric pressure. The outside air enters the valve body 1 through the inhalation channel 12 to supplement the pressure into the storage tank to achieve the air pressure balance inside and outside the tank.
[0021] The above embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
Claims
1. A breathing valve for maintaining pressure balance in a storage tank, characterized in that: The invention comprises a valve body (1) and a valve cover (2) made of plastic. The bottom of the valve body (1) is provided with a vent (11) for connecting to a storage tank. The valve body (1) is provided with a negative pressure valve seat (3) and a positive pressure valve seat (4). A groove (31) is provided in the middle of the negative pressure valve seat (3). A negative pressure valve disc (32) is provided in the groove (31). The side of the valve body (1) is provided with an inhalation channel (12) and an exhalation channel (13). The inhalation channel (12) passes through The negative pressure valve seat (3) is connected to the groove (31); the diameter of the negative pressure valve disc (32) is larger than the inner diameter of the inhalation channel (12); the exhalation channel (13) is located above the positive pressure valve seat (4); a through hole is provided in the middle of the positive pressure valve seat (4); a positive pressure valve disc (41) is provided above the through hole; a guide rod (42) is connected to the middle of the positive pressure valve disc (41); and a through hole (14) corresponding to the guide rod (42) is provided at the top of the valve body (1).
2. A breathing valve for maintaining pressure balance in a storage tank according to claim 1, characterized in that: A guide rod sleeve (5) is provided on the outside of the through hole (14) in the valve body (1).
3. A breathing valve for maintaining pressure balance in a storage tank according to claim 2, characterized in that: The valve cover (2) is fixedly mounted on the top of the valve body (1) by means of bolts, and a protrusion (21) is embedded in the middle of the valve cover (2), and a through groove (22) corresponding to the guide rod sleeve (5) is formed at the bottom of the protrusion (21).
4. A breathing valve for maintaining pressure balance in a storage tank according to claim 1, characterized in that: A retaining bar (33) is disposed across the top of the inner wall of the groove (31), and the retaining bar (33) is integrally formed with the negative pressure valve seat (3).
5. A breathing valve for maintaining pressure balance in a storage tank according to claim 1, characterized in that: The outer end of the exhalation channel (13) is sleeved with a connecting flange 1 (6).
6. A breathing valve for maintaining pressure balance in a storage tank according to claim 1, characterized in that: The suction channel (12) located outside the valve body (1) is arranged in an arc-shaped structure, and the opening of the suction channel (12) faces downward.
7. A breathing valve for maintaining pressure balance in a storage tank according to claim 1, characterized in that: The outer end of the vent (11) is sleeved with a second connecting flange (7).