CN115031044B - A pressure-adjustable relief valve - Google Patents
A pressure-adjustable relief valve Download PDFInfo
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- CN115031044B CN115031044B CN202210885055.XA CN202210885055A CN115031044B CN 115031044 B CN115031044 B CN 115031044B CN 202210885055 A CN202210885055 A CN 202210885055A CN 115031044 B CN115031044 B CN 115031044B
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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
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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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
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
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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
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
本发明属于液压溢流阀设备技术领域，涉及一种通闭压力可调式溢流阀，包括入口、阀芯、三爪磁体固定环、下磁体、回位弹簧、三爪反推固定环、外壳和环形限位螺母；外壳前部的入口与阀芯卡槽式连接，阀芯上套装有下磁体，下磁体一侧设置有三爪磁体固定环，阀芯从三爪磁体固定环中穿过，三爪磁体固定环中装有上磁体，阀芯的后部从三爪反推固定环中穿过，三爪反推固定环的前侧设置回位弹簧，回位弹簧为阀芯提供反弹力，阀芯后端与环形限位螺母螺纹式连接；该装置实现了溢流阀门安全压力和最小阀门泄流压差的精确控制，从而达到了对大体积容器充分泄压的目标，避免了泄压不充分、压力过高的安全隐患。
The present invention belongs to the technical field of hydraulic relief valve equipment, and relates to a pressure-adjustable relief valve, comprising an inlet, a valve core, a three-claw magnet fixing ring, a lower magnet, a return spring, a three-claw reverse thrust fixing ring, a shell and an annular limit nut; the inlet at the front of the shell is connected to the valve core in a slot-type manner, the valve core is sleeved with a lower magnet, a three-claw magnet fixing ring is arranged on one side of the lower magnet, the valve core passes through the three-claw magnet fixing ring, an upper magnet is arranged in the three-claw magnet fixing ring, the rear of the valve core passes through the three-claw reverse thrust fixing ring, a return spring is arranged on the front side of the three-claw reverse thrust fixing ring, the return spring provides rebound force for the valve core, and the rear end of the valve core is threadedly connected to the annular limit nut; the device realizes precise control of the relief valve safety pressure and the minimum valve discharge pressure difference, thereby achieving the goal of fully relieving the pressure of a large-volume container, and avoiding the safety hazards of insufficient pressure relief and excessive pressure.
Description
Technical field:
The invention belongs to the technical field of hydraulic overflow valve equipment, and particularly relates to a high-pass low-closure overflow valve which is opened under high pressure and closed under low pressure by utilizing magnetic force and spring force, in particular to a pressure-adjustable overflow valve with open and close functions.
The background technology is as follows:
The overflow valve is a key safety guarantee for ensuring that the pressure of fluid in the pipeline and the container is in a reasonable range, the overflow valve generally sets the safety pressure through spring force or electromagnetic force, when the pressure of the fluid in the pipeline and the pressure container is larger than the spring force or electromagnetic force under the safety pressure, the valve is opened, and when the pressure of the fluid overflows to be lower than the safety pressure, the valve is rapidly closed, so that the stability and safety of the pressure are ensured.
In the prior art, chinese patent with the publication number of CN110984885A discloses an electromagnetic spring control type pilot overflow valve, which comprises a hexagonal plug, a pilot valve front cavity, a pilot valve body, a damping flow passage, a main valve upper cavity flow passage, a pilot valve rear cavity, a pilot valve core, a permanent magnet I, a permanent magnet II, a magnetic conduction sleeve, an electromagnetic coil, magnetic lines, an end cover, a magnetic conduction screw rod, a coil rack, an oil return flow passage, a damper, an oil inlet flow passage, a main valve body, a hexagonal plug, a main valve sleeve, a main valve core and a permanent magnet ring. The Chinese patent with the publication number of CN212690489U discloses an ultrahigh-pressure three-way proportional pressure reducing valve with electromagnetic isolation, which comprises a pressure reducing valve body, a pressure reducing valve core, a pressure reducing spring, an end cover, a cone valve spring, a cone valve core, an electromechanical converter and a control valve, wherein the ultrahigh-pressure three-way proportional pressure reducing valve changes the outlet oil pressure acting force on all pressure bearing surfaces of the valve core adopted by the traditional pressure reducing valve into the technical scheme that the outlet oil pressure acting force on part of the pressure bearing surfaces of the valve core is directly compared with the oil pressure acting force set by the cone valve on all pressure bearing surfaces of the valve core.
However, for some high-volume high-pressure vessels containing highly compressible fluids, the instantaneous venting of conventional relief valves only produces a local decrease in pressure around the valve, and the fluid pressure away from the valve remains at a dangerous condition above the safe pressure. In addition, high-compressibility fluids can produce high-velocity transient flows when the valve is open, resulting in a water hammer pressure above the safe pressure when the valve is closed, which pressure can propagate around the vessel in the form of elastic waves, creating a secondary pressure safety hazard. The pressure of the container and the pipeline with different specifications is different, the pressure value of the valve can not be accurately regulated and controlled by the conventional overflow valve according to specific application scenes, therefore, the valve with the adjustable overflow pressure relief for a long time is required to be designed, so that the pressure safety of the high-compressibility fluid large-volume container is ensured, the wider hydraulic opening and closing range is ensured, and the application adaptability and the application universality are improved.
The invention comprises the following steps:
The invention aims to overcome the defects of the prior art, and designs the pressure-adjustable overflow valve with the opening and closing functions by utilizing the different characteristics of magnetic attraction and spring elasticity along with displacement change aiming at the defects of short pressure release time, uncontrollable flow release and potential pressure safety hazard when the conventional overflow valve is applied to a high-compressibility fluid large-volume container.
The invention relates to a pressure-adjustable relief valve, which comprises an inlet, a valve core, a three-jaw magnet fixing ring, an upper magnet, a lower magnet, a return spring, a three-jaw reverse thrust fixing ring, a shell and an annular limiting nut, wherein the inlet is arranged in the front part of the shell, the inlet is in clamping groove type airtight connection with the valve core, the valve core can enter or be pulled out from the inlet, the lower magnet is fixedly sleeved on the valve core, one side of the lower magnet is provided with the three-jaw magnet fixing ring, the valve core penetrates through the three-jaw magnet fixing ring, the three-jaw magnet fixing ring is fixedly connected with the shell into a whole, a fluid channel is formed between the three-jaw magnet fixing ring and the shell, an annular upper magnet is arranged in the three-jaw magnet fixing ring, the upper magnet has opposite polarity to the contact surface of the lower magnet, the rear part of the valve core penetrates through the three-jaw reverse thrust fixing ring, the three-jaw reverse thrust fixing ring is fixedly connected with the shell into a whole, a fluid channel is formed between the three-jaw reverse thrust fixing ring and the shell, the front side of the three-jaw reverse thrust fixing ring is provided with the return spring, the return spring front end of the return spring is connected with the retaining ring, and the valve core is fixedly connected with the annular limiting nut by the valve core through the three-jaw reverse thrust fixing ring.
The invention discloses a pressure-adjustable overflow valve, which is characterized in that a shell is of a tubular structure, an inlet is formed in the front part of the shell, the inlet is formed by combining a conical pipe cavity on the front part and a cylindrical smooth pipe cavity on the rear part, the conical pipe cavity is used for generating fluid with a certain flow rate, the smooth pipe cavity is contacted with a clamping groove type clearance of a valve core, the contact clearance is smaller than 0.02mm, the valve core can extend into the smooth pipe cavity to a maximum length of 10cm, when the valve core is contacted with the smooth pipe cavity in the inlet, the valve is closed, when the valve core is separated from the smooth pipe cavity in the inlet, the valve is opened, a sealing ring is fixedly sleeved outside the valve core, and the sealing ring is used for providing clearance sealing between the smooth pipe cavity and the valve core.
The valve core is fixedly sleeved with an annular lower magnet, three bulges are uniformly distributed on the outer side part of a three-jaw magnet fixing ring arranged on one side of the lower magnet, the three bulges of the three-jaw magnet fixing ring are fixedly connected with a shell into a whole through fixing screws, three fluid channels are formed between the three bulges of the three-jaw magnet fixing ring and the shell, an annular upper magnet is arranged in the three-jaw magnet fixing ring, the upper magnet and the lower magnet are composed of permanent magnets and are in paired existence, the magnetic attraction force of the pair of upper magnets and the pair of lower magnets can provide 20MPa-40MPa of fluid pressure for the valve core, and 1-10 pairs of lower magnets and upper magnets arranged on the three-jaw magnet fixing ring can be installed according to specific application scenes and required fluid pressure, so that the setting of the valve safety overflow pressure in the range of 20MPa-400MPa is realized.
The three-jaw reverse-pushing fixed ring is characterized in that three protrusions are uniformly distributed on the outer side of the three-jaw reverse-pushing fixed ring, the three protrusions of the three-jaw reverse-pushing fixed ring are fixedly connected with the shell into a whole through fixing screws, and three fluid channels are formed between the three protrusions of the three-jaw reverse-pushing fixed ring and the shell.
The valve core is connected with the annular limiting nut through fine threads with the thread pitch of 0.5mm-1mm, the minimum distance between the upper magnet and the lower magnet can be controlled to be changed between 0mm-40mm by adjusting the annular limiting nut, so that the safe overflow pressure of the valve is finely adjusted within the range of 0.1MPa-0.2MPa and the maximum range of 40MPa, the valve core displacement is 10cm when the valve is opened, the distance between the upper magnet and the lower magnet is synchronously increased by 10cm, the magnetic attraction between the upper magnet and the lower magnet is rapidly reduced and is smaller than the spring force, the return spring is used for providing the return thrust of the valve core after the valve is opened, and the valve pressure difference when the valve core returns can be controlled to be changed within the range of 0.2MPa-10MPa by adjusting the elastic force of the return spring.
The invention discloses a pressure-adjustable overflow valve for opening and closing a high-pressure low-pressure valve, which comprises the following specific steps:
(1) The connection position of the annular limiting nut and the rear end of the valve core is rotationally adjusted, the minimum distance between the upper magnet and the lower magnet is controlled, the safety overflow pressure is well adjusted, and the overflow valve with adjustable opening and closing pressure is installed to a large-volume container containing high-compressibility fluid by adopting a threaded structure or a flange structure;
(2) When the pressure of the large-volume container exceeds the set safe overflow pressure, the valve core is pushed out of the inlet under the fluid pressure, and the overflow valve with adjustable opening and closing pressure is in an opening state;
(3) After the opening of the pressure-adjustable overflow valve, the pressure difference exists between the front and the rear of the fluid passing through the pressure-adjustable overflow valve, under the pressure difference, the impact force of the fluid is larger than the elastic force of the return spring, and the pressure of the pressure-adjustable overflow valve starts to be continuously released;
(4) After the pressure of the pressure-adjustable overflow valve is continuously relieved for a period of time, the pressure difference between the front and the rear of the pressure-adjustable overflow valve is reduced, the fluid impact force is smaller than the elastic force of the return spring, and the valve core returns under the elastic force of the return spring.
Compared with the prior art, the designed pressure-adjustable overflow valve is reasonable in main structure, the overflow valve for opening and relieving pressure in high pressure and closing and stabilizing pressure in low pressure is designed by utilizing magnetic attraction between permanent magnets and spring force, and the accurate control of the safety pressure of the overflow valve and the minimum valve leakage pressure difference is realized, so that the aim of fully relieving pressure of a large-volume container filled with high-compressibility fluid is fulfilled, and the potential safety hazards of insufficient pressure relief and overhigh pressure are avoided.
Description of the drawings:
Fig. 1 is a schematic structural diagram of an adjustable relief valve according to the present invention.
Fig. 2 is a schematic structural diagram of a three-jaw magnet fixing ring according to the present invention.
Fig. 3 is a schematic structural diagram of a lower magnet according to the present invention.
Fig. 4 is a schematic structural diagram of a three-jaw thrust reverser retaining ring according to the present invention.
The specific embodiment is as follows:
the invention is further illustrated by the following examples in conjunction with the accompanying drawings.
Examples:
As shown in FIG. 1, the main structure of the pressure-adjustable overflow valve comprises an inlet 1, a sealing ring 2, a valve core 3, a three-jaw magnet fixing ring 4, an upper magnet 5, a lower magnet 6, a return spring 7, a fixing screw 8, a three-jaw reverse-pushing fixing ring 9, a shell 10, a valve body and a valve body, An annular limit nut 11, an inlet 1 is arranged in the front part of a shell 10 of a tubular structure, the inlet 1 is formed by combining a conical cavity on the front part and a cylindrical smooth cavity on the rear part, the conical cavity is used for generating fluid with a certain flow rate, the smooth cavity is in clamping groove type clearance contact with a valve core 3, the contact clearance is smaller than 0.02mm, the maximum length of the valve core 3 which can extend into the smooth cavity is about 10cm, when the valve core 3 contacts with the smooth cavity in the inlet 1, a valve is closed, when the valve core 3 is separated from the smooth cavity in the inlet 1, the valve is opened, a sealing ring 2 is fixedly sleeved outside the valve core 3, the sealing ring 2 is used for providing clearance seal between the smooth cavity and the valve core 3, as shown in figure 1, 3, a circular ring-shaped lower magnet 6 is fixedly sleeved on the valve core 3, a three-jaw magnet fixing ring 4 is arranged on one side of the lower magnet 6, the valve core 3 penetrates through the three-jaw magnet fixing ring 4, three bulges are uniformly distributed on the outer side part of the three-jaw magnet fixing ring 4 as shown in fig. 2, the three bulges of the three-jaw magnet fixing ring 4 are fixedly connected with a shell 10 into a whole through fixing screws 8 respectively, three fluid channels are formed between the three bulges of the three-jaw magnet fixing ring 4 and the shell 10, a circular ring-shaped upper magnet 5 is arranged in the three-jaw magnet fixing ring 4, the upper magnet 5 and the lower magnet 6 are formed by permanent magnets in pairs, the contact surface of the upper magnet 5 and the lower magnet 6 has opposite polarities, The magnetic attraction force exists, the magnetic attraction force of the pair of upper magnets 5 and the lower magnets 6 can provide 20MPa-40MPa for the valve core 3, the combination of the lower magnets 6 arranged on the valve core 3 and the upper magnets 5 arranged on the three-jaw magnet fixing ring 4 can be installed for 1-10 pairs according to specific application situations and required fluid pressure, thereby setting the valve safety overflow pressure within the range of 20MPa-400MPa, the rear part of the valve core 3 penetrates through the three-jaw thrust reverser fixing ring 9, three protrusions are uniformly distributed on the outer side part of the three-jaw thrust reverser fixing ring 9, three protrusions of the three-jaw thrust reverser fixing ring 9 are fixedly connected with the shell 10 into a whole through fixing screws 8 respectively, three fluid channels are formed between the three protrusions of the three-jaw thrust reverser fixing ring 9 and the shell 10, a return spring 7 is arranged on the front side of the three-jaw thrust reverser fixing ring 9, the front end of the return spring 7 is connected with a baffle ring 12, the baffle ring 12 is fixed on the valve core 3, as shown in fig. 4, The baffle ring 12 is used for fixing the return spring 7 and providing spring counter thrust, the rear end of the valve core 3 is connected with the annular limit nut 11 through fine threads with the thread pitch of 0.5mm-1mm, the minimum distance between the upper magnet 5 and the lower magnet 6 can be controlled to be changed between 0mm-40mm by adjusting the annular limit nut 11, so that the precision of the safety overflow pressure of the valve is 0.1MPa-0.2MPa, the maximum range of the safety overflow pressure of the valve is about 40MPa, the valve core 3 is displaced by about 10cm when the valve is opened, the distance between the upper magnet 5 and the lower magnet 6 is synchronously increased by about 10cm, and the magnetic attraction between the upper magnet 5 and the lower magnet 6 is rapidly reduced and is smaller than the spring force. The return spring 7 is used for providing return thrust of the valve core 3 after the valve is opened, and the valve pressure difference when the valve core 3 returns can be controlled to be changed between 0.2MPa and 10MPa through the elastic force adjustment of the return spring 7.
The invention discloses a pressure-adjustable overflow valve for opening and closing a high-pressure low-pressure valve, which comprises the following specific steps:
(1) The connection position of the annular limiting nut 11 and the rear end of the valve core 3 is rotationally adjusted, the minimum distance between the upper magnet 5 and the lower magnet 6 is controlled, the safety overflow pressure is adjusted, and the overflow valve with adjustable opening and closing pressure is installed to a large-volume container containing high-compressibility fluid by adopting a threaded structure or a flange structure;
(2) When the pressure of the large-volume container exceeds the set safe overflow pressure, the valve core 3 is pushed out from the inlet 1 under the fluid pressure, and the overflow valve with adjustable opening and closing pressure is in an opening state;
(3) After the opening of the pressure-adjustable overflow valve, the fluid impact force of the pressure-adjustable overflow valve is larger than the elastic force of the return spring 7 under the pressure difference between the front and the back of the pressure-adjustable overflow valve, and the pressure-adjustable overflow valve starts to continuously release pressure;
(4) After the pressure of the pressure-adjustable relief valve is continuously relieved for a period of time, the pressure difference between the front and the rear of the pressure-adjustable relief valve is reduced, the fluid impact force is smaller than the elastic force of the return spring 7, and the valve core 3 returns under the elastic force of the return spring 7.
The working principle of the invention is that the magnetic attraction between permanent magnets is sharply reduced along with the increase of the distance, when the distance between opposite permanent magnets is smaller, the strong magnetic force can maintain the high safety pressure when the overflow valve is closed, when the fluid pressure of a container exceeds the safety pressure, the magnetic force between opposite permanent magnets is sharply reduced along with the increase of the displacement of the valve core 3, the closing force of the overflow valve with adjustable opening and closing pressure is reduced, the valve core 3 can be opened for a long time under the fluid impact force, the pressure is fully released for a large-volume container containing high-compressibility fluid, the return elastic force of the valve core 3 is provided by utilizing the elastic force of a spring, the minimum leakage pressure difference of the valve can be controlled, the leakage time and the leakage flow are further controlled, and the potential safety hazards of insufficient pressure release and overhigh pressure are avoided.
Claims (4)
1. The pressure-adjustable overflow valve comprises an inlet, a valve core, a three-jaw magnet fixing ring, a return spring, a three-jaw reverse-pushing fixing ring and a shell, and is characterized by further comprising a lower magnet and an annular limiting nut; the valve core is fixedly sleeved with a lower magnet, one side of the lower magnet is provided with a three-jaw magnet fixing ring, the valve core penetrates through the three-jaw magnet fixing ring, the three-jaw magnet fixing ring is fixedly connected with the shell into a whole, a fluid channel is formed between the three-jaw magnet fixing ring and the shell, an upper magnet is arranged in the three-jaw magnet fixing ring, the contact surface of the upper magnet and the lower magnet is opposite in polarity, magnetic attraction exists, the rear part of the valve core penetrates through the three-jaw thrust back fixing ring, the three-jaw thrust back fixing ring is fixedly connected with the shell into a whole, a fluid channel is formed between the three-jaw thrust back fixing ring and the shell, a return spring is arranged on the front side of the three-jaw thrust back fixing ring, the front end of the return spring is connected with a retaining ring, the three-jaw thrust back fixing ring and the retaining ring are fixedly connected with the valve core, and the three-jaw thrust back end of the valve core is provided with an annular thread stop nut;
the valve core is characterized in that a lower magnet fixedly sleeved on the valve core is annular, three bulges are uniformly distributed on the outer side part of a three-claw magnet fixing ring arranged on one side of the lower magnet, the three bulges of the three-claw magnet fixing ring are fixedly connected with the shell into a whole through fixing screws, and three fluid channels are formed between the three bulges of the three-claw magnet fixing ring and the shell; the three-jaw magnet fixing ring is internally provided with a circular ring-shaped upper magnet, the upper magnet and the lower magnet are composed of permanent magnets and are in paired existence, and the magnetic attraction force of the pair of upper magnets and the lower magnet can provide 20MPa-40MPa for the valve core;
The rear end of the valve core is connected with the annular limiting nut through fine threads with the thread pitch of 0.5mm-1mm, the minimum distance between the upper magnet and the lower magnet can be controlled to be changed between 0mm-40mm by adjusting the annular limiting nut, so that the safety overflow pressure of the valve can be finely adjusted within the range of 0.1MPa-0.2MPa and the maximum range of 40MPa, the valve core is displaced by 10cm when the valve is opened, the distance between the upper magnet and the lower magnet is synchronously increased by 10cm, the magnetic attraction between the upper magnet and the lower magnet is sharply reduced and is smaller than the spring force, the return spring is used for providing the return thrust of the valve core after the valve is opened, and the valve pressure difference when the valve core returns can be controlled to be changed within the range of 0.2MPa-10MPa by adjusting the spring force of the return spring.
2. The pressure-adjustable overflow valve according to claim 1, wherein the smooth pipe cavity is in contact with a clamping groove type gap of the valve core, the contact gap is smaller than 0.02mm, the maximum length of the valve core which can extend into the smooth pipe cavity is 10cm, when the valve core is in contact with the smooth pipe cavity in the inlet, the valve is closed, when the valve core is separated from the smooth pipe cavity in the inlet, the valve is opened, a sealing ring is fixedly sleeved outside the valve core, and the sealing ring is used for providing gap sealing between the smooth pipe cavity and the valve core.
3. The pressure-adjustable overflow valve according to claim 1 or claim 2, wherein three protrusions are uniformly distributed on the outer side of the three-jaw thrust-reversing fixed ring, the three protrusions of the three-jaw thrust-reversing fixed ring are fixedly connected with the shell into a whole through fixing screws, and three fluid channels are formed between the three protrusions of the three-jaw thrust-reversing fixed ring and the shell.
4. The pressure-adjustable overflow valve according to claim 3, wherein the specific steps of opening the high-pressure low-pressure valve and closing the low-pressure valve are as follows:
(1) The connection position of the annular limiting nut and the rear end of the valve core is rotationally adjusted, the minimum distance between the upper magnet and the lower magnet is controlled, the safety overflow pressure is well adjusted, and the overflow valve with adjustable opening and closing pressure is installed to a large-volume container containing high-compressibility fluid by adopting a threaded structure or a flange structure;
(2) When the pressure of the large-volume container exceeds the set safe overflow pressure, the valve core is pushed out of the inlet under the fluid pressure, and the overflow valve with adjustable opening and closing pressure is in an opening state;
(3) After the opening of the pressure-adjustable overflow valve, the pressure difference exists between the front and the rear of the fluid passing through the pressure-adjustable overflow valve, under the pressure difference, the impact force of the fluid is larger than the elastic force of the return spring, and the pressure of the pressure-adjustable overflow valve starts to be continuously released;
(4) After the pressure of the pressure-adjustable overflow valve is continuously relieved for a period of time, the pressure difference between the front and the rear of the pressure-adjustable overflow valve is reduced, the fluid impact force is smaller than the elastic force of the return spring, and the valve core returns under the elastic force of the return spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210885055.XA CN115031044B (en) | 2022-07-26 | 2022-07-26 | A pressure-adjustable relief valve |
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| CN202210885055.XA CN115031044B (en) | 2022-07-26 | 2022-07-26 | A pressure-adjustable relief valve |
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| CN115031044A CN115031044A (en) | 2022-09-09 |
| CN115031044B true CN115031044B (en) | 2025-02-28 |
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| CN202210885055.XA Active CN115031044B (en) | 2022-07-26 | 2022-07-26 | A pressure-adjustable relief valve |
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| CN117481650B (en) * | 2024-01-02 | 2024-03-19 | 德州市红拳医疗器械有限公司 | An animal blood collection device |
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| JP2010185469A (en) * | 2009-02-10 | 2010-08-26 | Nippon Pneumatic Mfg Co Ltd | Control valve and air hammer |
| US10801632B2 (en) * | 2014-05-08 | 2020-10-13 | Amg Container Controls, Inc. | Two-way valve with rapid decompression flow dynamics |
| SK8946Y1 (en) * | 2019-10-01 | 2020-12-02 | Protherm Production S R O | Bypass valve |
| CN211343538U (en) * | 2019-10-29 | 2020-08-25 | 昆明理工大学 | Permanent magnet spring type overflow valve pilot valve |
| DE102020124511A1 (en) * | 2020-09-21 | 2022-03-24 | Liebherr-Components Deggendorf Gmbh | Flow limiter for a fuel injection system and fuel injection system with a flow limiter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1394120A (en) * | 1971-05-10 | 1975-05-14 | British Oxygen Co Ltd | Safety valves |
| WO2008068430A1 (en) * | 2006-11-21 | 2008-06-12 | Ad-Venta Sarl | Pneumatic sectioning component with hysteresis<0} |
| CN209278562U (en) * | 2018-12-04 | 2019-08-20 | 百驰阀门科技有限公司 | Damping check valve |
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| CN115031044A (en) | 2022-09-09 |
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