CN108361424B - Air cavity damping type pressure relief valve - Google Patents
Air cavity damping type pressure relief valve Download PDFInfo
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- CN108361424B CN108361424B CN201810154494.7A CN201810154494A CN108361424B CN 108361424 B CN108361424 B CN 108361424B CN 201810154494 A CN201810154494 A CN 201810154494A CN 108361424 B CN108361424 B CN 108361424B
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- damping
- disc
- valve
- air cavity
- relief valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
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- Mechanical Engineering (AREA)
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Abstract
The invention provides an air cavity damping type pressure relief valve, which comprises a valve body, a valve disc, a damping mechanism, a spring, an installation flange seat and a plurality of support adjusting rods, wherein the valve disc is arranged on the valve body; the valve body is a cylinder with openings at two ends, and the bottom end of the valve body is fixed on the pressure chamber bulkhead through an installation flange seat; the valve disc comprises a disc body and a cylinder body, the cylinder body is sleeved on a damping disc of the damping mechanism, a sealing ring is arranged on the outer ring of the damping disc, so that a damping air cavity is formed by the disc body, the cylinder body and the damping disc, and damping holes are formed in the disc body and used for air to enter and exit; the position of the damping back plate is changed by adjusting the length of the supporting adjusting rod, so that the pretightening force of the spring is adjusted. The pressure relief valve is used for self-operated pressure relief on the periphery of an airtight area and has an air cavity resistance anti-disturbance function, when the actual overpressure in the airtight area is higher than a design value, the pressure relief valve is opened by self-operation, and pressure is relieved outwards according to the designed flow; when the actual overpressure is below the design value, the pressure relief valve is closed.
Description
Technical Field
The invention relates to the field of pressure regulating valves, in particular to an air cavity damping type pressure relief valve.
Background
The collective protection technology is used as the most effective means for preventing the nuclear and chemical pollutant from entering the interior of the ship, and has been widely applied to various ships at home and abroad. The key of the collective protection technology is to maintain stable overpressure relative to the outside atmosphere in the collective protection area. The method needs a complex overpressure control system, and mainly comprises an overpressure control valve, a pressure relief valve, an atmospheric pressure probe, a cabin pressure gauge, a manual relief valve and the like. The pressure relief valve is one of important devices, is arranged in a large number in a personnel passage at the periphery of a collective protection area, and has the main function of maintaining the pressure in an access passage to be stable when personnel pass through the access passage.
In the actual use environment, when people pass through the entrance and exit of the collective protection area, the door opening and closing operation is needed, a great disturbance factor is generated on the overpressure establishment of the collective protection area, and the disturbance is temporary and eliminated along with the closing of the door. Because the common pressure relief valves all adopt simple actuating mechanisms such as springs or reeds, the anti-interference capability is poor, and the pressure in a channel changes violently at the moment of opening and closing the valve. The disturbance caused by the change of the external pressure can be effectively eliminated by adding the air cavity damping mechanism, and meanwhile, the discharge effect cannot be influenced.
Disclosure of Invention
The invention aims to provide an air cavity damping type pressure relief valve, which aims to solve the problems that the existing pressure relief valve is poor in anti-jamming capability and the pressure in a channel changes violently at the moment of opening and closing a door.
In order to solve the technical problems, the technical scheme of the invention is as follows: the air cavity damping type pressure relief valve comprises a valve body, a valve disc, a damping mechanism, a spring, an installation flange seat and a plurality of support adjusting rods; the valve body is a cylinder with openings at two ends, and the bottom end of the valve body is fixed on the pressure chamber bulkhead through the mounting flange seat; the valve disc is arranged in the valve body and matched with the opening at the top end of the valve body, the valve disc comprises a disc body and a cylinder body, the cylinder body is sleeved on a damping disc of the damping mechanism, a sealing ring is arranged on the outer ring of the damping disc, so that the disc body, the cylinder body and the damping disc form a damping air cavity, and the disc body is provided with damping holes for air to enter and exit; the damping mechanism further comprises a damping back plate, one end of the damping back plate is fixedly connected with the damping disc, and the other end of the damping back plate is connected with the mounting flange plate through the support adjusting rod; two ends of the spring are respectively connected with the disc body and the damping back plate; the position of the damping back plate is changed by adjusting the length of the supporting and adjusting rod, so that the pre-tightening force of the spring is adjusted;
when no pressure difference exists between the two sides of the bleeder valve, the valve disc is pressed to the top opening of the valve body by the pretightening force of the spring so as to keep the closing state of the bleeder valve; when pressure difference is generated on two sides of the bleeder valve and changes, the valve disc is opened or closed under the action of pressure to generate a compression or stretching effect on the damping air cavity, a reaction force is generated in the damping air cavity to delay the pressure change, meanwhile, the air cavity exhausts through the damping holes, and the reaction force is gradually reduced until the internal and external pressures of the damping air cavity are balanced again.
Furthermore, a protective net is arranged at an opening at the top end of the valve body.
Further, the mounting flange seat is provided with a protective net.
Further, the support adjusting rod is provided with threads, and the length of the support adjusting rod is adjusted through the threads.
Further, the valve body is formed by adopting a stainless steel integrated technology.
Further, the pre-tightening force adjusting range of the spring is 0-700 Pa.
Further, the number of the support adjusting rods is 3.
The air cavity damping type pressure relief valve provided by the invention is used for self-operated pressure relief on the periphery of an airtight area and has the function of air cavity resistance disturbance resistance, when the actual overpressure in the airtight area is higher than a design value, the pressure relief valve is opened in a self-operated manner and externally relives pressure according to the designed flow; when the actual overpressure is lower than the design value, the pressure relief valve is closed; when the external airflow field generates disturbance, the disturbance is eliminated through the air cavity damping mechanism, and the pressure difference at two ends of the discharge valve is ensured to be stable.
Drawings
The invention is further described with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of an air cavity damping type pressure relief valve of the present invention;
fig. 2 is a schematic diagram of the operation of the air chamber damped pressure relief valve of the present invention.
Detailed Description
The air chamber damping type pressure relief valve of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise ratio for the purpose of facilitating and distinctly aiding in the description of the embodiments of the invention.
The invention relates to an air cavity damping type pressure relief valve, which comprises a protective net 1, a valve body 2, a valve disc 3, a spring 4, a damping mechanism 5, a support adjusting rod 6, an installation flange seat 7 and the like; the valve body 2 is a cylindrical barrel, and both ends are provided with openings. The top of the valve body 2 is provided with a protective net 1, the bottom opening of the valve body 2 is fixed on a bulkhead through an installation flange seat 7, and the installation flange seat is provided with the protective net. The valve disk 3 is located in the valve body 2 and is concentrically matched with the top opening and can be opened and closed. The rear part of the valve disc 3 is provided with a hollow cylindrical barrel 3-1 which is sleeved on a damping disc 5-1 of the damping mechanism 5, and the outer ring of the damping disc 5-1 is provided with a sealing ring 5-2, so that the air tightness between the valve disc barrel 3-1 and the damping disc 5-1 is ensured, and the valve disc can flexibly slide. A spring 4 is also arranged outside the valve disc cylinder 3-1, and two ends of the spring 4 are respectively contacted with the valve disc 3 and the root part of the damping mechanism 5; the bottom of damping mechanism 5 is equipped with 3 and supports adjusting lever 6, is connected with mounting flange seat 7, adjusts lever 6 and has the screw thread, can adjust the position of damping mechanism 5 through rotatory adjusting lever 6 to the pretightning force of adjusting spring 4. A damping air cavity is formed between the damping disc 5-1 and the valve disc cylinder 3-1 of the damping mechanism, and the front surface of the valve disc is provided with a damping hole 3-2.
When the two sides of the bleeder valve have no pressure difference, the valve disc is pressed into the valve body by the pretightening force of the bleeder valve spring to keep the valve member closed.
When a fixed pressure difference is generated on two sides of the bleeder valve, the pressure difference acts on the valve disc to generate a fixed pressure to push the valve disc to open and compress the spring, the spring force is increased, meanwhile, an air cavity between the valve disc and the damping device is compressed, and air is exhausted through a damping hole in the middle of the valve disc to slow down the moving speed of the valve disc until the pressure on the valve disc is balanced with the spring force;
when the bleeder valve both sides produce the pressure differential time and change, the valve disc of pressure bleeder valve is opened or is closed under the effect of pressure, produces a compression and tensile effect to the damping air cavity, produces a reaction force in the air cavity and delays pressure variation, and the air cavity passes through the damping hole exhaust simultaneously, and the reaction force reduces gradually, and is balanced again until the inside and outside pressure of air cavity. The change process is slow relative to a pressure relief valve without an air cavity damping mechanism, but the final balance point is consistent.
If the pressure difference is instantaneous, the pressure difference is eliminated in a short period after the pressure difference is generated, and the valve disc only generates a small displacement to restore the original state under the action of the damping air cavity. The reaction force of the damping air cavity slows down and even eliminates transient disturbance to ensure the stability of overpressure in the cabin.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. An air cavity damping type pressure relief valve is characterized by comprising a valve body, a valve disc, a damping mechanism, a spring, an installation flange seat and a plurality of support adjusting rods; the valve body is a cylinder with openings at two ends, and the bottom end of the valve body is fixed on the pressure cabin wall through the mounting flange seat; the valve disc is arranged in the valve body and matched with the opening at the top end of the valve body, the valve disc comprises a disc body and a cylinder body, the cylinder body is sleeved on a damping disc of the damping mechanism, a sealing ring is arranged on the outer ring of the damping disc, so that the disc body, the cylinder body and the damping disc form a damping air cavity, and the disc body is provided with damping holes for air to enter and exit; the damping mechanism further comprises a damping back plate, one end of the damping back plate is fixedly connected with the damping disc, and the other end of the damping back plate is connected with the mounting flange seat through the supporting and adjusting rod; two ends of the spring are respectively connected with the disc body and the damping back plate; the position of the damping back plate is changed by adjusting the length of the supporting and adjusting rod, so that the pretightening force of the spring is adjusted;
when no pressure difference exists between the two sides of the relief valve, the valve disc is pressed to the top opening of the valve body by the pretightening force of the spring so as to keep the closing state of the relief valve; when pressure difference changes are generated on two sides of the relief valve, the valve disc is opened or closed under the action of pressure to generate a compression or stretching effect on the damping air cavity, reaction force generated in the damping air cavity delays the pressure change, meanwhile, the air cavity exhausts through the damping holes, and the reaction force is gradually reduced until the internal pressure and the external pressure of the damping air cavity are rebalanced.
2. Air cavity damped pressure relief valve according to claim 1, wherein the top opening of the valve body is provided with a protective mesh.
3. Air cavity damped pressure relief valve according to claim 1, wherein said mounting flange seat is provided with a protective mesh.
4. The air cavity damped pressure relief valve according to claim 1, wherein said support adjustment rod is threaded, and the length of said support adjustment rod is adjusted by the threading.
5. The air cavity damped pressure relief valve of claim 1, wherein said valve body is formed in one piece from stainless steel.
6. The air cavity damping type pressure relief valve according to claim 1, wherein the pre-tightening force adjustment range of the spring is 0-700 Pa.
7. Air cavity damped pressure relief valve according to claim 1, wherein said support adjustment stem is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810154494.7A CN108361424B (en) | 2018-02-23 | 2018-02-23 | Air cavity damping type pressure relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810154494.7A CN108361424B (en) | 2018-02-23 | 2018-02-23 | Air cavity damping type pressure relief valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108361424A CN108361424A (en) | 2018-08-03 |
| CN108361424B true CN108361424B (en) | 2022-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810154494.7A Active CN108361424B (en) | 2018-02-23 | 2018-02-23 | Air cavity damping type pressure relief valve |
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| Country | Link |
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| CN (1) | CN108361424B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3605802A (en) * | 1968-11-02 | 1971-09-20 | Itt | Check valve |
| US4693270A (en) * | 1986-03-24 | 1987-09-15 | Durabla Manufacturing Co. | Check valve |
| CN201487309U (en) * | 2009-03-30 | 2010-05-26 | 郑州大学 | High-pressure check valve |
| CN102089559A (en) * | 2008-07-08 | 2011-06-08 | 艾默生过程管理调节技术公司 | Pressure relief valves |
| CN202360831U (en) * | 2011-12-15 | 2012-08-01 | 中国舰船研究设计中心 | Flow adjustment discharge valve |
| CN202493726U (en) * | 2011-08-29 | 2012-10-17 | 太平洋水处理工程有限公司 | Blower discharge valve with rapid discharge control mechanism |
| CN204267816U (en) * | 2014-12-09 | 2015-04-15 | 洛阳中集凌宇汽车有限公司 | A kind of huge discharge relief valve |
-
2018
- 2018-02-23 CN CN201810154494.7A patent/CN108361424B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3605802A (en) * | 1968-11-02 | 1971-09-20 | Itt | Check valve |
| US4693270A (en) * | 1986-03-24 | 1987-09-15 | Durabla Manufacturing Co. | Check valve |
| CN102089559A (en) * | 2008-07-08 | 2011-06-08 | 艾默生过程管理调节技术公司 | Pressure relief valves |
| CN201487309U (en) * | 2009-03-30 | 2010-05-26 | 郑州大学 | High-pressure check valve |
| CN202493726U (en) * | 2011-08-29 | 2012-10-17 | 太平洋水处理工程有限公司 | Blower discharge valve with rapid discharge control mechanism |
| CN202360831U (en) * | 2011-12-15 | 2012-08-01 | 中国舰船研究设计中心 | Flow adjustment discharge valve |
| CN204267816U (en) * | 2014-12-09 | 2015-04-15 | 洛阳中集凌宇汽车有限公司 | A kind of huge discharge relief valve |
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| Publication number | Publication date |
|---|---|
| CN108361424A (en) | 2018-08-03 |
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