Novel vent valve
By designing a new ventilation valve, the gas pressure balance inside and outside the tank is achieved using gravity balls and elastic components, the problem of liquid leakage during transportation is solved and transportation safety is improved.
Patent Information
- Application Number
- CN202421877585.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-08-05
AI Technical Summary
Existing ventilation valves are prone to liquid leakage due to bumps or rollovers in transportation tankers, which poses safety hazards.
A new type of ventilation valve is designed, including a detachable connection of the lower valve body and the upper valve body. It uses gravity balls, elastic components and sealing structures to achieve air pressure balance inside and outside the tank body, and automatically seal when bumping or rolling over to prevent liquid leakage.
Effectively adjust the air pressure balance inside and outside the tank to prevent liquid leakage and improve transportation safety.
Smart Images
Figure CN223165116U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valve bodies, in particular to a novel ventilation valve. Background Art
[0002] A ventilation valve is a valve device installed on a closed container, pipeline or system, used to adjust the internal and external atmospheric pressure balance and prevent damage to equipment caused by overpressure or vacuum conditions. It is widely used in various storage tanks, pipelines and transport tank trucks. When some existing ventilation valves are used in transport tank trucks, due to the bumps generated during the transportation of the tank trucks and the possible rollover of the tank trucks in case of an accident, these may cause the liquid in the tank of the transport tank truck to leak out from the ventilation valve, resulting in the loss of the liquid in the tank and potential safety hazards. In view of the above technical problems, the ventilation valve of this application has been improved, aiming to provide a more reliable ventilation valve that can effectively prevent the liquid in the tank from leaking. Summary of the Utility Model
[0003] The utility model provides a novel ventilation valve, which solves the above problems existing in the prior art during use.
[0004] The technical solution of the utility model is realized as follows: A novel ventilation valve includes a lower valve body and an upper valve body that are detachably connected. The lower end of the upper valve body extends into the lower valve body and is connected with an inner cylinder. An upper valve seat is integrally formed in the upper valve body. A plurality of upper ventilation ports are opened on the upper valve seat. A resisting column is movably fitted in the middle of the upper valve seat. An upper valve flap is fixedly connected to the end of the resisting column located below the upper valve seat. A gravity ball is arranged above the upper valve seat, and the gravity ball abuts against the upper end of the resisting column. A lower valve seat is movably arranged in the inner cylinder. An elastic component for abutting against the lower side of the lower valve seat to press it against the lower end of the upper valve body is also arranged in the inner cylinder. A plurality of negative pressure ports are opened on the side wall of the inner cylinder. A plurality of lower ventilation ports are opened on the lower valve seat. A guide column is movably fitted in the middle of the lower valve seat. A lower valve flap is fixedly connected to the end of the guide column located above the lower valve seat. A first spring is arranged between the lower valve flap and the upper valve flap.
[0005] Preferably, a limiting block is threadedly connected to the lower end of the guide column, and a second spring is sleeved on the guide column between the limiting block and the lower valve seat.
[0006] Preferably, a ventilation cover is fixedly covered on the upper valve body, and a plurality of through holes are opened on the ventilation cover.
[0007] Preferably, a shielding cap is provided on the ventilation hood. A number of positioning ribs are integrally formed on the inner side wall of the shielding cap. A holding step that abuts against the lower valve body is provided on the positioning rib. Fixing screws are also provided on the shielding cap corresponding to each positioning rib. An inverted conical surface is provided at the upper end of the outer side wall of the lower valve body. The fixing screws are pressed against the inverted conical surface.
[0008] Preferably, the elastic component includes a third spring. An annular inner edge is integrally formed at the lower end of the inner cylinder. The upper and lower ends of the third spring respectively abut against the lower valve seat and the annular inner edge.
[0009] Preferably, a rubber layer is fixedly connected to the inner side wall of the upper valve body and is located above the upper valve seat.
[0010] Preferably, a sealing ring is integrally formed on the lower side of the upper valve seat. The sealing ring surrounds each of the upper ventilation ports therein.
[0011] In summary, the beneficial effects of the present utility model are as follows:
[0012] 1. When the liquid in the tank is in a normal state, the lower valve flap presses tightly on the lower valve seat to form a seal for the lower ventilation port. When the internal pressure of the tank increases due to reasons such as temperature rise and filling, the lower valve flap is pushed upward, and the internal gas then passes through the lower ventilation port and then through the upper ventilation port of the upper valve seat and is discharged to the atmosphere until the internal pressure drops to a safe level, and the lower valve flap then returns downward under the action of the first spring;
[0013] When negative pressure is generated inside the tank due to reasons such as cooling and material consumption, the external atmospheric pressure pushes the lower valve flap and the lower valve seat together to move downward and compress the elastic component. When the lower valve seat moves to a position lower than the negative pressure port, external air can enter the tank through the negative pressure port until the internal pressure rises to the set threshold value, and the lower valve seat moves upward under the action of the elastic component and presses tightly against the lower end of the upper valve body again to close the negative pressure port;
[0014] Among them, because the gravity ball always presses against the abutting post in the natural state, the upper valve flap always remains in an open state with the upper valve seat. However, when the transport tanker generates bumps or has an accident and capsizes during transportation, it is difficult for the gravity ball to maintain the state of abutting against the upper end of the abutting post. At the moment when the gravity ball loses its support, the first spring will immediately push the upper valve flap upward to make the upper valve flap press tightly on the upper valve seat to form a seal for the upper ventilation port. Therefore, it can effectively prevent the liquid in the tank from leaking.
[0015] In summary, the overall design structure of the present utility model is reasonable and reliable, can effectively adjust the balance between the internal pressure of the tank and the external atmospheric pressure, and can effectively prevent the liquid in the tank from leaking. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0017] Figure 1 Schematic diagram of the overall structure of the present invention;
[0018] Figure 2 For Figure 1 Schematic diagram of the structure when observed from the lower side;
[0019] Figure 3 Schematic cross-sectional structure diagram of the present invention;
[0020] Figure 4 Schematic diagram of the structure of the present invention after removing the shielding cap;
[0021] Figure 5 Schematic diagram of the shielding cap in the present invention.
[0022] In the figure: 1, lower valve body; 11, inverted conical surface; 2, upper valve body; 21, upper valve seat; 22, sealing ring; 23, upper vent hole; 24, rubber layer; 3, inner cylinder; 31, negative pressure port; 32, annular inner edge; 41, abutting column; 42, upper valve flap; 43, gravity ball; 5, lower valve seat; 51, lower vent hole; 61, guide column; 62, lower valve flap; 63, limiting block; 71, second spring; 72, first spring; 73, third spring; 8, ventilation cover; 81, through hole; 9, shielding cap; 91, positioning rib; 92, abutting step; 93, fixing screw. Specific embodiments
[0023] The following will combine the attached Figures 1 - 5 in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0024] Embodiment:
[0025] Such as Figures 1 to 5As shown in the figure, the utility model discloses a novel ventilation valve, which includes a lower valve body 1 and an upper valve body 2 that are detachably connected. The lower valve body 1 and the upper valve body 2 are connected by threads. The lower end of the upper valve body 2 extends into the lower valve body 1 and is threadedly connected with an inner cylinder 3. An upper valve seat 21 is integrally formed in the upper valve body 2. A plurality of upper ventilation ports 23 are formed in the upper valve seat 21. A resisting column 41 is movably fitted in the middle of the upper valve seat 21. An upper valve flap 42 is fixedly connected to one end of the resisting column 41 below the upper valve seat 21. In addition, a gravity ball 43 is arranged above the upper valve seat 21, and the gravity ball 43 abuts against the upper end of the resisting column 41. In addition, a lower valve seat 5 is movably arranged in the inner cylinder 3. An elastic component for abutting against the lower side of the lower valve seat 5 to press it against the lower end of the upper valve body 2 is also arranged in the inner cylinder 3. Specifically, the elastic component includes a third spring 73. An annular inner edge 32 is integrally formed at the lower end of the inner cylinder 3. The upper and lower ends of the third spring 73 respectively abut against the lower valve seat 5 and the annular inner edge 32. A plurality of negative pressure ports 31 are formed in the side wall of the inner cylinder 3, and a plurality of lower ventilation ports 51 are formed in the lower valve seat 5. A guide post 61 is movably fitted in the middle of the lower valve seat 5. A lower valve flap 62 is fixedly connected to one end of the guide post 61 above the lower valve seat 5. A first spring 72 is arranged between the lower valve flap 62 and the upper valve flap 42.
[0026] Further, a limit block 63 is threadedly connected to the lower end of the guide post 61. A second spring 71 is sleeved between the limit block 63 and the lower valve seat 5 of the guide post 61. The second spring 71 can make the lower valve flap 62 press more tightly against the lower valve seat 5.
[0027] In order to improve the sealing effect of the upper valve flap 42 on the upper ventilation ports 23 when necessary, a sealing ring 22 is integrally formed on the lower side of the upper valve seat 21, and the sealing ring 22 surrounds each upper ventilation port 23.
[0028] The working principle of the utility model: When the liquid in the tank is in a normal state, the lower valve flap 62 presses tightly against the lower valve seat 5 to form a seal for the lower ventilation ports 51. When the internal pressure of the tank increases due to reasons such as temperature rise and filling, the lower valve flap 62 is pushed upward, and the internal gas then passes through the lower ventilation ports 51, and then through the upper ventilation ports 23 of the upper valve seat 21, and is discharged to the atmosphere until the internal pressure drops to a safe level, and the lower valve flap 62 is reset downward due to the action of the first spring 72 and the second spring 71;
[0029] When negative pressure occurs inside the tank body due to reasons such as cooling and material consumption, the external atmospheric pressure pushes the lower valve flap 62 and the lower valve seat 5 downward to compress the third spring 73 and move. When the lower valve seat 5 moves to a position lower than the negative pressure port 31, external air can enter the tank body through the negative pressure port 31 until the internal pressure rises to the set threshold. Then, the lower valve seat 5 moves upward under the action of the third spring 73 and presses tightly against the lower end of the upper valve body 2 again, thus closing the negative pressure port 31.
[0030] Among them, in the natural state, because the gravity ball 43 always presses against the abutting column 41, the upper valve flap 42 always remains in an open state with the upper valve seat 21. Even if the lower valve flap 62 is pushed upward, the position of the upper valve flap 42 remains basically unchanged. However, when the transport tanker jolts during transportation or capsizes accidentally, it is difficult for the gravity ball 43 to maintain the state of abutting against the upper end of the abutting column 41. At the moment when the gravity ball 43 loses its support, the first spring 72 will immediately push the upper valve flap 42 upward, causing the upper valve flap 42 to press tightly against the sealing ring 22 of the upper valve seat 21, thereby sealing the upper ventilation port 23. Therefore, it can effectively prevent the liquid in the tank from leaking.
[0031] In the present utility model, a ventilation cover 8 is fixedly covered on the upper valve body 2. A plurality of through holes 81 are opened on the ventilation cover 8. The ventilation cover 8 can prevent the gravity ball 43 from falling out, and the ventilation cover 8 can prevent foreign objects from entering the present utility model.
[0032] Furthermore, a shielding cap 9 is also covered on the ventilation cover 8. A plurality of positioning ribs 91 are integrally formed on the inner side wall of the shielding cap 9. There are abutting steps 92 on these positioning ribs 91 that abut against the lower valve body 1. And corresponding to each positioning rib 91 on the shielding cap 9, there are fixing screws 93. The upper end of the outer side wall of the lower valve body 1 is provided with an inverted conical surface 11, and the fixing screws 93 press against the inverted conical surface 11. This structure firmly and reliably fixes the shielding cap 9 on the lower valve body 1.
[0033] In order to protect the inner side wall of the upper valve body 2 and prevent the generation of noise, a rubber layer 24 is fixedly connected to the inner side wall of the upper valve body 2 above the upper valve seat 21. The rubber layer 24 plays a role in buffering and reducing noise under the impact of the gravity ball 43.
[0034] At the same time, it should be pointed out that the terms used in the present utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.
[0035] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A novel ventilation valve, characterized in that: It includes a lower valve body and an upper valve body that are detachably connected. The lower end of the upper valve body extends into the lower valve body and is connected with an inner cylinder. An upper valve seat is integrally formed in the upper valve body. A number of upper ventilation ports are formed in the upper valve seat. A resisting column is movably fitted in the middle of the upper valve seat. An upper valve flap is fixedly connected to one end of the resisting column located below the upper valve seat. A gravity ball is arranged above the upper valve seat, and the gravity ball abuts against the upper end of the resisting column. A lower valve seat is movably arranged in the inner cylinder. An elastic component for abutting against the lower side of the lower valve seat to press it against the lower end of the upper valve body is also arranged in the inner cylinder. A number of negative pressure ports are formed in the side wall of the inner cylinder. A number of lower ventilation ports are formed in the lower valve seat. A guide column is movably fitted in the middle of the lower valve seat. A lower valve flap is fixedly connected to one end of the guide column located above the lower valve seat. A first spring is arranged between the lower valve flap and the upper valve flap.
2. The novel ventilation valve according to claim 1, wherein: A limiting block is threadedly connected to the lower end of the guide column, and a second spring is sleeved between the limiting block and the lower valve seat on the guide column.
3. A novel ventilation valve according to claim 1, characterized in that: A ventilation cover is fixedly covered on the upper valve body, and a number of through holes are formed in the ventilation cover.
4. A novel ventilation valve according to claim 3, characterized in that: A shielding cap is covered on the ventilation cover. A number of positioning ribs are integrally formed on the inner side wall of the shielding cap. A resisting step for abutting against the lower valve body is arranged on the positioning ribs. Fixing screws are also arranged on the shielding cap corresponding to each positioning rib. An inverted conical surface is arranged at the upper end of the outer side wall of the lower valve body, and the fixing screws are pressed on the inverted conical surface.
5. A novel ventilation valve according to claim 1, characterized in that: The elastic component includes a third spring. An annular inner edge is integrally formed at the lower end of the inner cylinder. The upper and lower ends of the third spring respectively abut against the lower valve seat and the annular inner edge.
6. A novel ventilation valve according to claim 1, characterized in that: A rubber layer located above the upper valve seat is fixedly connected to the inner side wall of the upper valve body.
7. A novel ventilation valve according to claim 1, characterized in that: A sealing ring is integrally formed on the lower side of the upper valve seat, and the sealing ring surrounds each of the upper ventilation ports.