KR101086640B1 - Relief valve for easily adjusting closing force - Google Patents

Relief valve for easily adjusting closing force Download PDF

Info

Publication number
KR101086640B1
KR101086640B1 KR1020100105520A KR20100105520A KR101086640B1 KR 101086640 B1 KR101086640 B1 KR 101086640B1 KR 1020100105520 A KR1020100105520 A KR 1020100105520A KR 20100105520 A KR20100105520 A KR 20100105520A KR 101086640 B1 KR101086640 B1 KR 101086640B1
Authority
KR
South Korea
Prior art keywords
flow path
valve
valve body
magnet
connecting rod
Prior art date
Application number
KR1020100105520A
Other languages
Korean (ko)
Inventor
김영만
Original Assignee
주식회사 프로세이브
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 프로세이브 filed Critical 주식회사 프로세이브
Priority to KR1020100105520A priority Critical patent/KR101086640B1/en
Application granted granted Critical
Publication of KR101086640B1 publication Critical patent/KR101086640B1/en

Links

Images

Classifications

    • 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
    • F16K15/00—Check valves
    • F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
    • 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
    • F16K17/12—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side weight-loaded
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • 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
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
    • F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Abstract

It is an object of the present invention to provide a relief valve having a structure that can increase the sealing force of the valve body closing the flow path without disturbing the discharge of the pressure gas, and is easy to control the sealing force. Relief valve of the present invention for achieving the above object, the flow path in the vertical direction is formed, the lower end of the flow path is in communication with the interior of the tank valve housing formed around the upper end of the flow path And a hollow guide fixed to the valve housing or the valve seat and installed up and down in the flow path, and having a lower magnet fixed at an upper end thereof, and positioned at an upper end of the flow path to contact the valve seat. The sealing body is formed around the lower portion and the inner space is formed and the valve body movable up and down along the hollow guide in the state that the lower magnet is located in the inner space, and the lower magnet of the inner space The upper magnet is opposed to the lower magnet and the action of the upper and upper with the valve body It characterized in that it comprises a gap adjusting means for adjusting the gap between the upper magnet and the upper magnet and the lower magnet to move downward.

Description

Relief Valve for easily adjusting closing force

The present invention relates to a relief valve of a tank, and more particularly to relieve the pressure difference from the atmospheric pressure caused by the evaporation of the storage liquid in the reservoir of a vessel carrying oil or chemicals or the storage tank storing the substance or It relates to a relief valve installed to reduce.

In general, relief tanks are installed in storage tanks of ships storing and transporting oil or chemicals, or storage tanks installed on land, in order to relieve or reduce the increased pressure inside the tank due to the evaporation of the supplied oil or chemicals.

One example of such a relief valve is shown in FIG. 1.

Referring to FIG. 1, a relief valve is formed with a valve housing 1 and a flow path 6 of pressure gas penetrating the inside of the valve housing 1. The lower end of the flow path 6 communicates with a tank in which oil or chemicals are stored, and a valve seat 7 is installed at an upper circumference of the flow path 6, that is, an upper end of the valve housing 1. In addition, the valve body 2 is seated on the valve seat 7 to seal the flow path 6, and an additional weight 4 is fixed to the lower portion of the valve body 2 by the connecting means 3 so that the valve is closed. The sealing force of the body 2 is improved.

According to such a structure, when the pressure in a tank rises and a pressure acts on the lower part of the valve body 2, the sealing force including the weight of the valve body 2, the weight of the additional weight 4, atmospheric pressure, etc. In case of overcoming, the valve body 2 rises to release the pressure in the tank.

The relief valve as described above sets the pressure at which the valve body 2 opens slightly to prevent the valve body 2 from opening from time to time and reduces the amount of toxic gas discharged. In addition, when the set pressure is increased, the required amount of inert gas injected into the tank to prevent explosion can be reduced.

The additional weight 4 may be further installed on the valve body 2 in such a way as to increase the opening pressure. However, the additional weight 4 prevents the flow of pressure gas on the flow path 6. The additional weight of material is required, and the excessive weight makes it difficult to manufacture and maintain.

The present invention has been made to solve the above problems, an object of the present invention can increase the sealing force of the valve body for closing the flow path without disturbing the discharge of the pressure gas and also easy to control the sealing force It is to provide a relief valve of one structure.

Relief valve of the present invention for achieving the above object, the flow path in the vertical direction is formed, the lower end of the flow path is in communication with the interior of the tank valve housing formed around the upper end of the flow path And a hollow guide fixed to the valve housing or the valve seat and installed up and down in the flow path, and having a lower magnet fixed at an upper end thereof, and positioned at an upper end of the flow path to contact the valve seat. The sealing body is formed around the lower portion and the inner space is formed and the valve body movable up and down along the hollow guide in the state that the lower magnet is located in the inner space, and the lower magnet of the inner space The upper magnet is opposed to the lower magnet and the action of the upper and upper with the valve body It characterized in that it comprises a gap adjusting means for adjusting the gap between the upper magnet and the upper magnet and the lower magnet to move downward.

Preferably, the gap adjusting means is a connecting rod having the upper magnet fixed thereto, and a locking means capable of moving on the connecting rod and locking the connecting rod to the upper portion of the valve body.

The locking means preferably includes a spiral formed on the upper portion of the connecting rod and a nut screwed to the spiral to allow the connecting rod to be caught on the upper portion of the valve body.

In another aspect, the relief valve of the present invention includes a valve housing in which a vertical flow path is formed, a lower end of the flow path communicates with the inside of the tank, and a valve seat is formed around the upper end of the flow path; A lower disk is formed at the upper end of the flow path and in contact with the valve seat to seal the flow path is formed in the periphery of the lower portion and the through-hole is formed in the center of the lower portion, and the inner space is coupled to the upper portion of the lower disk. A valve body including an upper cap formed therein and having a through hole formed in a central portion of the upper portion; A hollow guide fixed to the valve housing or the valve seat and extending in a vertical direction through a through hole of the lower disc, the upper end of which is located in the inner space and the lower magnet fixed to the upper end; And a hole movable up and down in the hollow guide and protruding out of the upper cap through a through hole of the upper cap, and a nut is rotatably fastened to a spiral of a predetermined length formed at the protruding portion thereof. It characterized in that it comprises a connecting rod is fixed to the upper magnet is installed so that the lower magnet and the attraction force in the inner space.

The relief valve of the present invention as described above has the following effects.

First, the present invention is provided with upper and lower magnets inside the valve body and by reducing the size and weight of the additional weight by increasing the sealing force of the valve body by the attraction force of the upper and lower magnets to prevent the flow of pressure gas in the flow path Can be minimized. In addition, since the magnitude of the magnetic force acting between the magnetic poles is inversely proportional to the square of the distance between the magnetic poles, the magnetic force is drastically reduced while the valve body is opened and the upper and lower magnets are separated from each other. Accordingly, compared to the additional weight, it helps to achieve the effect of the pop-up valve without significantly disturbing the process of the valve body rising.

Second, the present invention is provided with a gap adjusting means so that the distance of the upper and lower magnets can be easily adjusted, the sealing force of the valve body can be adjusted according to the change of the situation to easily change the blow pressure of the pressure gas inside the tank.

1 is a configuration diagram of an example of a conventional relief valve
2 is a block diagram of a relief valve according to an embodiment of the present invention
3 is an enlarged view of a portion “A” of FIG. 2.
Figure 4 is a configuration diagram installed by modifying the valve seat according to an embodiment of the present invention
5 is a configuration of the valve body and the support cover according to an embodiment of the present invention
Figure 6 is an explanatory view of the end length of the support cover according to an embodiment of the present invention
Figure 7 is an exploded configuration for explaining a method for adjusting the interval of the upper and lower magnets according to an embodiment of the present invention
8 to 10 is a view explaining the operation of the valve body lifting process according to an embodiment of the present invention
11 is a configuration in which the support cover is modified in accordance with an embodiment of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings.

2 shows a relief valve according to an embodiment of the invention.

Referring to FIG. 2, a vertical flow path 15 is formed according to an embodiment of the present invention, and a lower end of the flow path 15 communicates with an inside of the tank, and a circumference of an upper end of the flow path 15 is provided. The valve housing 10 having a valve seat 12 formed therein, and a sealing area 312 positioned at an upper end of the flow path 15 and in contact with the valve seat 12 to seal the flow path 15, are provided at a lower portion thereof. A support cover 40 which is formed around the valve body 30 and the valve body 30 to lift the valve body 30 in response to the output of the pressure gas ejected upon release of the sealing of the sealed area. ).

The valve housing 10 is in the shape of a connecting tube in which a gas flow path 15 is formed therein, and a flange is formed at the lower portion so as to be coupled to an upper portion of a tank for storing oil or chemicals. The valve seat 12 is coupled to each other. The flow path 15 is formed in the vertical direction so that the inlet of the pressure gas from the tank is located at the bottom and the outlet of the pressure gas discharged into the atmosphere is located at the top.

A branch hole is formed at the side of the valve housing 10 so that the vacuum relief valve 20 is installed. When the vacuum relief valve 20 has a negative pressure formed therein, the weight 22 that seals the inlet rises and the outside air flows in to solve the internal negative pressure.

The valve seat 12 is installed at the upper portion of the valve housing 10. The valve seat 12 is configured to allow the valve body 30 to be seated on the upper side by reducing the flow path 15 in a tapered shape as shown in FIG. 2.

In the valve seat 12, the valve body 30 is in contact with each other, as shown in FIG. 3, and a tapered chamfered sealing surface 23 is formed. The sealing surface 23 is precisely processed by lapping so as to be in intimate contact with the curved surface of the sealing area 312 of the valve body 30.

In this embodiment, the valve seat 12 is configured in a manner that is separately manufactured and flange-coupled to the upper portion of the valve housing 10, the valve seat (top) in the upper portion of the valve housing 10 further extended to the upper portion as shown in FIG. It can be configured in such a way that the ring-shaped valve seat 12 'corresponding to 12) is seated.

As a result, the valve seat 12 is configured as described above are all formed around the upper end of the flow path 15 is configured to place the valve body 30.

Meanwhile, the valve body 30 serves to seal or open the flow path 15 at the upper end of the flow path 15 through which the pressure gas flows out. 5 specifically illustrates the valve body 30.

Referring to FIG. 5, the valve body 30 includes a lower disk 31, an upper cap 32, a top cap 34, and a cap cover 35. The lower disk 31 and the upper cap 32 are screwed and coupled to form an internal space 37 therein. The top cap 34 and the cap cover 35 are sequentially coupled to the upper portion of the upper cap 32.

The lower disk 31 is a portion in contact with the valve seat 12 in the valve body 30, allowing or blocking the outflow of the pressure gas in the state mounted on the valve seat 12. As shown in FIG. 3, the lower disc 31 has a lower protrusion 311 protruding inwardly of the flow path 15 and a closed area for sealing the flow path 15 in contact with the valve seat 12. 312 and a gas guide region 313 inclined in a cross section cut in the vertical direction in a tapered shape on the upper side of the sealed region 312.

The lower protrusion 311 has a disk shape having a predetermined thickness and protrudes downward, and the side surface thereof forms a small gap b around the inner circumferential surface of the valve seat 12. Therefore, in the state where the lower protrusion 311 does not completely leave the flow path 15 at the initial time when the upper side of the flow path 15 starts to open, only a part of the gas to be ejected is formed between the side surface and the valve seat 12. Only a small amount of gas can be ejected through the gap formed.

The sealing region 312 formed on the upper side of the lower protrusion 311 is a curved surface having a large radius of curvature as shown in the enlarged portion of FIG. 3 and is in point contact with the sealing surface of the valve seat 12 (cut in the vertical direction. The flow path 15 is sealed. The sealing area 312 is formed along the circumference of the lower disk 31.

The gas guide region 313 formed at an upper side of the sealed region 312 serves to guide upwardly the gas ejected in an inclined shape.

Meanwhile, referring to FIG. 5, the upper cap 32 is coupled by the lower disk 31 and the bolt 321, and the inner space 37 is coupled inside the lower disk 31 and the upper cap 32. Formed. Upper and lower magnets 531 and 533 are located in the internal space 37. The structure and action of the upper and lower magnet assembly 53 will be described later.

The top cap 34 is fixed to the upper portion of the upper cap 32 to cover the upper portion of the connecting rod 52 to be described later, the outer side of the top cap 34 cap cover 35 is the edge of the upper cap 32 It is fixed to the upper surface of the upper cap 32 and the top cap 34 to protect.

Since the valve body 30 configured as described above is mounted on the valve seat 12, an action force for closing the upper side of the flow path 15 is generated by the action of its own weight, the weight of the additional weight 51, the magnetic force, and atmospheric pressure. do.

As shown in FIG. 2, the additional weight 51 is located in the space on the flow path 15 and is fixed to each other by the valve body 30 and the connecting rod 52.

The additional weight 51 is installed for the purpose of increasing the weight acting on the valve body 30 to increase the sealing force of the valve body 30, and the stainless steel body protects the weight body of the brazing material.

The connecting rod 52 is slid in the hollow guide 121, so that the shankdong is guided, the hollow guide 121 is a valve seat 12 (or valve housing 10) by a plurality of ribs (122) It is fixedly installed.

On the other hand, on the upper side of the valve body 30, the support cover 40 for raising the valve body 30 by the pressure gas ejected is fixed.

Since the support cover 40 is in the shape of an inverted container (bowl), it is fixed in a state formed at a constant interval along the circumference in the side of the valve body 30 in a state covering the valve body 30 from the top It is formed with a diameter larger than the diameter of the valve body (30). In the space between the side of the valve body 30 and the support cover 40 is discharged pressure gas is collected.

In addition, as shown in FIG. 6, the lower end 44 of the support cover 40 is positioned below the tangent of the point B in point contact with the valve seat 20 in the sealing area 312. The lower end 44 of the support cover 40 extends downward. This means an approximate straight path through which the tangential point of the point B can proceed after the pressure gas accelerated by the split power hits the closed region 312, and most of the remaining pressure gases are gas guide regions 313. The lift cover 40 can provide a larger lifting force to the valve body 30 by the configuration because it will rise. If the lower end 44 of the support cover 40 is located above the tangential, a considerable amount of the pressure gas ejected will not be collected and will flow out.

When the lifting force by the support cover 40 is excessive, it is also possible to reduce the lifting force of the valve body 30 by forming a plurality of perforated adjustment holes in the support cover 40.

Next, the structure of the upper and lower magnets installed in the valve body 30 will be described.

Referring to Figure 5, the upper magnet 531 is fixed to the upper portion of the connecting rod 52 coupled from the additional weight 51 and the lower. Specifically, the upper magnet support 532 to which the upper magnet 531 is fixed is fixed to the connecting rod 52 by the nut 524. The upper end of the connecting rod 52 is the upper cap 32 by fastening the nut 526 to the spiral 527 formed on the upper end of the connecting rod 52 in the state protruded through the upper cap 32 of the valve body 30 Is jammed.

The lower magnet 533 is fixed to the upper end of the hollow guide 121 by the lower magnetic support 534. Since the hollow guide 121 is fixed to the valve seat 12 (or the valve housing 10) by the plurality of ribs 122 as described above, the lower magnet 533 is the valve body 30 and the connecting rod Despite the vertical movement of 52, the position is fixed.

The lower protrusion 311 of the valve body 30 has a through hole 314 formed at the center thereof so that the hollow guide 121 is installed, and the vertical movement is possible along the outer surface of the hollow guide 121. Therefore, as shown in FIG. 10, the bottom of the lower magnetic support 534 hits the bottom surface of the inner space 37 at the maximum lift position of the valve body 30, thereby limiting the lift.

According to such a configuration, when the valve body 30 is raised, the valve body 30 raises the connecting rod 52 together, and the upper magnet 531 fixed thereto must also be raised. At this time, since the attraction force between the upper magnet 531 and the lower magnet 533, the attraction force of the upper and lower magnets (531, 533) is increasing the sealing force of the flow path (15).

Next, the process of reducing the sealing force that the valve body 30 seals the flow path 15 by adjusting the interval of the upper and lower magnets (531, 533). This can be utilized if the pressure inside the tank is too high even after the relief valve is installed.

Referring to Figure 7, first, the support cover 40, the cap cover 35 and the top cap 34 of the valve body is removed as shown to expose the upper cap 32. The upper end of the connecting rod 52 is exposed at the center of the exposed upper cap 32 and the nut 526 is fastened to the spiral 527 formed at the upper end of the connecting rod 52. The combination of the connecting rod 52 and the nut 526 constitute the gap adjusting means of the present invention. The connecting rod 52 is not necessarily in the shape of a rod, and may be any means for connecting the upper magnet 531 to be fixed or locked to the upper cap 32, and the nut 526 is connected to the connecting rod 52. It may be replaced by a pin insertion hole formed in the pin and the connecting rod to be fixed or locked to the upper cap (32).

At this time, the hexagonal wrench is inserted into the groove formed at the end of the connecting rod 52 to rotate the connecting rod 52 or rotate the nut 526 to lower the position of the nut 526 at the upper end of the connecting rod 52. Move it. As the nut 526 moves downwards, the connecting rod 52 is raised, so that the upper magnet 531 fixed to the connecting rod 52 is also moved upward by a "C" interval like the movement amount of the nut 526. . Accordingly, the lower magnet 533 in which the position is fixed by the hollow guide 121 in which the position is fixed and the upper magnet 531 installed opposite thereto generate a distance of "C". This means that the attraction force of the lower magnet 533 and the upper magnet 531 is reduced, so that the sealing force for the valve body 30 to close the flow path 15 is reduced, so that the flow path 15 can be opened even at a lower pressure. Means that you can.

When the nut 526 is moved upward again in the changed state, while the lower magnet 533 and the upper magnet 531 approach or adhere to each other, the attraction force increases and the internal pressure for opening the flow path 15 is set higher. do.

As described above, in this embodiment, the gap adjusting means of the upper and lower magnets 531 may be installed to easily adjust the sealing force of the valve body 30 as necessary.

The following describes the operation of the relief valve configured as described above.

First, the relief valve of the present invention is installed such that the flow path 15 of the valve housing 10 and the inside of the tank communicate with each other at the top of the tank for storing oil or evaporative chemicals.

Thereafter, even if the pressure inside the tank increases due to the evaporation of oil or chemicals in the tank, the valve body 30 has its own weight, the weight of the additional weight 51, the attraction force of the upper and lower magnets 533, atmospheric pressure, and the like. It maintains the sealed state to the pressure that can overcome the sealing force.

When the pressure inside the tank rises further to overcome the sealing force, the valve body 30 is lifted and the evaporated pressure gas is started. However, at the beginning of the ejection of the pressure gas, as shown in FIG. 8, the lower projection 311 of the lower disk 31 of the valve body 30 does not completely exit from the opening of the valve seat 12. As a result, the amount of gas emitted is small, so it can continue to gain enough lift until it is completely released. This process occurs for a very short time, the valve body 30 is instantaneously risen in the initial stage of the start of the pressure gas ejection, as shown in Figure 9, the opening of the upper portion of the flow path 15 at the highest point momentarily As a result, the flow rate is greatly increased, and the flow rate is rapidly increased.

After that moment, the valve body 30 should be lowered again to a position where the lifting force and pressure of the sealing force are balanced by the pressure gas, but after the time when the flow rate sharply increases after the valve body 30 rises, the support cover ( As the pressure gas ejected toward 40 is collected in a large amount, the flotation cover 40 provides a lift force to the valve body 30 to prevent the valve body 30 from descending. This state continues until the flow rate of the pressure gas decreases. Accordingly, since the valve body 30 does not fall by weight, oscillation may be prevented.

That is, as shown in FIG. 8, in the initial short stroke section in which the valve body 30 rises, a small amount of pressure is applied to a narrow gap between the side surface of the lower protrusion 311 formed under the valve body 30 and the pressure seat. Since only the gas is ejected and receives a strong upward force exceeding the descending force by weight, oscillation does not occur until the lower protrusion 311 completely exits the flow path.

Thereafter, as shown in FIG. 9, after the lower protrusion 311 of the valve body 30 completely exits the flow path, the opening is opened momentarily and the flow rate of the pressure gas rapidly increases, and the jet is ejected at that time. As the pressure gas is collected in the flotation cover 40, the lifting force is generated in the flotation cover 40. As the flow rate is higher, the lifting force of the support cover 40 increases. Accordingly, in the position where the lower protrusion 311 of the valve body 30 completely exits the flow path, that is, the long stroke section as shown in FIG. 9 or FIG. Since the increase is to prevent the falling of the valve body 30 is also prevented oscillation phenomenon.

Initially, the upper and lower magnets inside the valve body 30 also make a significant contribution in the process of raising the valve body 30. That is, the magnitude of the magnetic force acting between the magnetic poles is inversely proportional to the square of the distance between the magnetic poles, and thus can be usefully used as a means of improving the sealing force in contact with or very close to each other. As the body 30 rises, it hardly serves as a resistor in comparison with the additional weight.

Then, when the valve body 30 is lowered due to the pressure in the tank being lowered, when the lower protrusion 311 of the valve body 30 enters the opening of the flow path 15, the flow rate of the pressure gas decreases rapidly, and the flotation cover The upward force of 40 is rapidly lost. Accordingly, the valve body 30 can be quickly seated on the valve seat 12 without the oscillation action.

In this process, the upper and lower magnets are closer to each other, the magnetic force is rapidly increased to further promote the lowering of the valve body (30).

In conclusion, the support cover 40 serves to raise the valve body 30 so that the oscillation action does not occur in a long stroke section in which the valve body 30 is opened to increase the flow rate of the pressure gas. . This is an action that occurs regardless of whether or not the lower protrusion 311 is provided in the valve body 30.

In addition, the support cover 40 is such that the relief valve of the present invention has a pop-up (POP-UP) by sufficiently raising the valve body 30 at the time when the pressure flow rate of the pressure gas increases. That is, when the flow path 15 is opened and the flow rate of the discharged pressure gas increases, the valve body 20 may be rapidly reached and maintained to a full stroke by receiving a lift force proportional to the increase in flow rate. Therefore, the pressure in the tank can be released quickly.

On the other hand, the support cover 40 of the present embodiment can be changed to the disk shape as shown in FIG.

Referring to FIG. 11, the shape of the support cover 40 ′ is a disc having a diameter larger than that of the valve body 30, and the center of the support cover 40 ′ is fixed to the upper center of the valve body 30.

Accordingly, the reaction time is delayed because the reaction time is located above the support cover 40 'of the above-described embodiment, but the valve body 30 is raised by receiving the upward force at a time when the flow rate of the ejected pressure gas is high. The same effect of preventing oscillation can be produced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the particular embodiments set forth herein. It goes without saying that other modified embodiments are possible.

10; Valve housing 12, 12 '; Valve seat
121; Hollow guide 122; live
15; Flow path 20; Vacuum Relief Valve
22; Weight 23; Airtight
30; Valve body 31; Lower disk
311; Bottom projection 312; Confined area
313; Gas guide region 314; Through hole
32; Upper cap 321; volt
324; Through hole 34; Top cap
341; Bolt 35; Cap cover
37; Internal space 40,40 ′; Flotation cover
44; Lower end 51 of the support cover; Extra weight
52; Connecting rod 524; nut
526; Nut 527; spiral
53; Upper and lower magnet assembly 531; Upper magnet
532; Upper magnetic support 533; Lower magnet
534; Lower Magnetic Support

Claims (4)

In the relief valve installed in the storage tank of oil or chemicals to release the pressure gas inside the tank to the atmosphere,
A valve housing 10 in which a vertical flow path 15 is formed, a lower end of the flow path 15 communicates with the inside of the tank, and a valve seat 12 is formed around the upper end of the flow path 15. and,
A hollow guide 121 fixed to the valve housing 10 or the valve seat 12 and installed up and down in the flow path 15 and having a lower magnet 533 fixed to an upper end thereof;
A sealing area 312 is formed at the upper end of the flow path 15 to contact the valve seat 12 to seal the flow path 15, and is formed around the lower portion of the flow path 15. A valve body 30 movable to
An internal space 37 formed in the valve body 30 and in which the lower magnet 533 is located;
An upper magnet 531 installed at an upper side of the lower magnet 533 in the inner space 37 so as to face the lower magnet 533 to work with the upper body and moving upward and downward with the valve body 30;
Relief valve comprising a gap adjusting means for adjusting the interval between the upper magnet 531 and the lower magnet 533 The method of claim 1,
Spacing means
It includes a connecting rod 52 is fixed to the upper magnet 531, and a locking means capable of moving the position on the connecting rod 52 and engaging the connecting rod 52 on the upper portion of the valve body 30. Featured relief valve The method of claim 2,
The locking means is
A spiral 527 formed on an upper portion of the connecting rod 52;
A relief valve comprising a nut 526 screwed to the spiral 527 to allow the connecting rod 52 to be engaged with the upper portion of the valve body 30. In the relief valve installed in the storage tank of oil or chemicals to release the pressure gas inside the tank to the atmosphere,
A valve housing 10 in which a vertical flow path 15 is formed, a lower end of the flow path 15 communicates with the inside of the tank, and a valve seat 12 is formed around the upper end of the flow path 15. ;
A sealing area 312 is formed at the upper end of the flow path 15 to contact the valve seat 12 to seal the flow path 15, and is formed around the lower portion of the flow path 15. The valve body 30 includes a lower disk 31 formed therein and an upper cap 32 formed with an inner space 37 by being coupled to an upper portion of the lower disk 31 and having a through hole 324 formed in a central portion of the upper disk. );
It is fixed to the valve housing 10 or the valve seat 12 and extends in the vertical direction through the through hole 314 of the lower disk 31 so that the upper end is located in the inner space 37 and the upper end The hollow magnet 121 is fixed to the lower magnet 533; And
It moves up and down in the hollow guide 121 and passes through the through hole 324 of the upper cap 32 and protrudes to the outside of the upper cap 32, a predetermined length formed on the protruding portion The connecting rod 52 is fastened so that the nut is rotatable to the spiral of the upper magnet 531 is installed so that the lower magnet 533 and the attraction force in the inner space 37 is fixed; Relief valve, characterized in that
KR1020100105520A 2010-10-27 2010-10-27 Relief valve for easily adjusting closing force KR101086640B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100105520A KR101086640B1 (en) 2010-10-27 2010-10-27 Relief valve for easily adjusting closing force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100105520A KR101086640B1 (en) 2010-10-27 2010-10-27 Relief valve for easily adjusting closing force

Publications (1)

Publication Number Publication Date
KR101086640B1 true KR101086640B1 (en) 2011-11-24

Family

ID=45398165

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100105520A KR101086640B1 (en) 2010-10-27 2010-10-27 Relief valve for easily adjusting closing force

Country Status (1)

Country Link
KR (1) KR101086640B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463776A (en) 1980-06-13 1984-08-07 Crosby Valve And Engineering Company, Limited Fluid pressure relief system actuator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463776A (en) 1980-06-13 1984-08-07 Crosby Valve And Engineering Company, Limited Fluid pressure relief system actuator

Similar Documents

Publication Publication Date Title
US9360127B2 (en) Control valve
US4325398A (en) Safety and venting valves for fuel tanks carried on vehicles
JPH06156093A (en) Fuel cutoff valve with float
US10081488B2 (en) Automatic aeration device for oil tank
US20130199635A1 (en) Pressure Release Valve
KR20130025932A (en) A cover for food container
US9365107B2 (en) Fuel tank vent apparatus
KR100369311B1 (en) A pressure relief valve that makes the pressure of the enclosure equal to the ambient atmospheric pressure
AU2013327419B2 (en) Combination air valve
KR101086639B1 (en) Relief valve
KR101086640B1 (en) Relief valve for easily adjusting closing force
EP2788641B1 (en) A pressure relief valve
KR101739571B1 (en) Air-vent for cargo of ship
US7194857B2 (en) Ventilation valve of hydraulic jack
KR101065729B1 (en) Check-lifter for relief valve and relief valve having the same
CN106494224B (en) A kind of bivalve type is without locking closure refueling device
US8171955B2 (en) Emergency relief vent for fuel storage tanks
US20220146013A1 (en) Discharge valve unit and fluid device
US11603866B2 (en) Landfill well pump
JP4206910B2 (en) Float valve
US6604544B2 (en) Safety valve of tank for storing and carrying oil or chemical substance
KR102365189B1 (en) Pressure and Vacuum Relief Valve
KR102019945B1 (en) A venting valve for cargo tanks
US11932101B2 (en) Valve device
KR100666324B1 (en) Roll over vent valve

Legal Events

Date Code Title Description
A201 Request for examination
N231 Notification of change of applicant
A302 Request for accelerated examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20140916

Year of fee payment: 4