JPH10339383A - Rapid speed opening pressure governing valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rapid speed opening pressure governing valve of simple structure whereby rapid speed opening can be performed, and a secondary side pressure can be limited to an aimed pressure or less. SOLUTION: A rapid speed opening pressure governing valve is constituted by a main element 1, valve element member 2, spring receiver 3, spring 4, seal pressure mechanism 5, valve action mechanism 6, etc., by operating the valve action mechanism 6, a tip end 65 breaks a seal plate 52, and a pressure of an inlet 11a is applied to an opening pressure receiving surface 25. In this condition, a contact surface diameter of a valve seat 13, external diameter of a closing/opening pressure receiving surface 24, 25 and force of the spring 4 are determined in a relation setting a pressure of an outlet 12a to a prescribed value or less. When the valve action mechanism 6 is inoperative, force by the inlet pressure acting in a valve cap 22 overcomes the spring 4, a valve is closed, when a mechanism is operative, a pressure of the opening pressure receiving surface 25 cancels a pressure of the valve cap 22, the valve is opened by spring force, when the outlet pressure rises, a pressure of the closing pressure receiving surface 24 overcomes spring tension, the valve is closed, the outlet pressure is limited to within a fixed value, and hereafter a proof pressure of pipe, valve, etc., can be decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick-opening pressure regulating valve which is mounted on, for example, a high-pressure fire-extinguishing inert gas cylinder or the like, which can be quickly opened and needs to limit the maximum pressure on the secondary side.

[0002]

_2. Description of the Related Art For example, CO used in a CO ₂ fire extinguisher
_{As a two-} cylinder valve, a valve that can be quickly opened by introducing high-pressure starting gas is generally used, but the pressure at the outlet side cannot be limited with this type of valve. On the other hand, as a valve provided with a pressure reducing mechanism, various cylinder valves with a pressure reducing valve of a type that is opened and closed by turning a handle have been proposed (for example, Japanese Patent Application Laid-Open No. 3-21917).
No. 2). However, such valves are not designed to open quickly.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and has a simple structure capable of rapidly opening and restricting the secondary pressure to a target pressure or less. It is an object to provide a pressure valve.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a first aspect of the present invention, wherein a quick-opening pressure regulating valve includes a main body having a fluid inlet and an outlet, a valve seat, and a first end. A valve body portion having the other end side, the valve body portion being opened and closed at the one end side to be in contact with and separated from the valve seat, a closed pressure receiving surface which is in communication with the outlet and receives a pressure in the closing direction, and a pressure in the opening direction formed on the other end side. A valve body member having an open receiving pressure surface for receiving the main body, the valve body member being guided by the main body so as to be movable in the opening and closing direction, a passage connecting between the one end side and the other end side, and a receiving member attached to the main body. A pressure member interposed between the receiving member and the valve member for urging the valve member in the opening direction; and a pressure sealing member mounted to close the passage. When actuated, the sealing member is opened to apply the pressure in the passage to the open pressure receiving surface. Sealing release means formed so as to be capable of being attached to the main body, wherein the dimensions of the valve seat, the dimensions of the closed pressure receiving surface, the dimensions of the open pressure receiving surface, and the urging force of the urging member are as described above. The outlet pressure is set so as to be equal to or lower than a predetermined pressure.

[0005] In addition to the above, the invention of claim 2 is characterized in that the dimensions of the valve seat and the dimensions of the open pressure receiving surface are the same.

According to a third aspect of the present invention, in addition to the features of the first aspect of the present invention, the sealing pressure releasing means receives a fluid pressure from a needle provided to face the sealing member. It has a piston-shaped member for urging the needle part so that the needle part penetrates the sealing member, and an operating part formed to be able to urge the piston-shaped member.

According to a fourth aspect of the present invention, in addition to the features of the first aspect, the open pressure receiving surface is interposed between the receiving member and the urging member and guided so as to be movable in the opening and closing direction. A movement receiving portion that has a pressure receiving surface that receives the same pressure and generates the urging force in the urging means when the urging means moves to the predetermined position in the opening direction; and the moving and receiving portion stops at the predetermined position. And a positioning portion provided on the main body.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of the entire structure of a quick-opening pressure regulating valve to which the present invention is applied. The quick opening pressure regulating valve includes a main body 1, a valve member 2, a conduction hole 23 as a passage provided in the valve member 2 in this example, a spring receiver 3 as a receiving member, a spring 4 as an urging member, and a seal. It has a sealing plate mechanism 5 as pressure means, a valve operating mechanism 6 as sealing pressure releasing means, and the like.

The main body 1 has an inlet nozzle 11 which forms an inlet 11a and an outlet 12a for a high pressure nitrogen as a fluid, for example.
And an outlet nozzle portion 12, a valve seat 13, and the like. The inlet nozzle part 11 is provided with a screw 11b to be mounted on a high-pressure nitrogen cylinder 100 as a quick-open pressure regulating valve 101, for example, as schematically shown in FIG. 5, and a reinforcing ring 11c is screwed into the inside thereof. Have been. The outlet nozzle section 12 is provided with a screw 12b for mounting a pipe of the nitrogen fire source line 105 shown in FIG. 5, for example. Body 1
Although not shown, a pressure gauge, a seat for a cylinder safety valve, and the like can be appropriately provided as necessary.

The valve body member 2 includes a cap 21 and a valve body 22 serving as a valve body portion which is opened and closed while being brought into contact with and separated from the valve seat 13, the conduction hole 23, a closed pressure receiving surface 24, an open pressure receiving surface 25, and the like. , Is guided by the main body 1 so as to be movable in the directions indicated by the up and down arrows Z-Z 'in the drawing which is the valve opening / closing direction. In this example, the conduction hole 23 is opened at one end and the other end at the ends in the Z ′ and Z directions, and one end is provided to communicate with the inlet 11a. The closed pressure receiving surface 24 is connected to the outlet 12
a, and receives a pressure in the Z direction which is the valve closing direction. For this reason, an O-ring 7 for pressure sealing is interposed on a guide surface on which the valve element member 2 is guided by the main body 1. The open pressure receiving surface 25 is formed at an end in the Z direction, and receives pressure in the arrow Z ′ direction, which is the open direction.

In the present embodiment, the spring receiver 3 is mounted on the outside of the upper end of the main body 1 by being screwed in, and supports the reaction force of the spring 4. An O-ring 8 seals the space between the upper part and the spring receiver 4 so that the valve member 2 can slide in an airtight state. The upper end of the main body 1 may have a large diameter, and the spring receiver 3 may be screwed into the upper end. The spring 4 is interposed between the spring receiving portion 26 of the valve member 2 and the spring receiver 3 and urges the valve member 2 in the Z ′ direction.

As shown in FIG. 3, the sealing mechanism 5 is pressed by a threaded ring 51, a sealing plate 52 as a sealing member made of, for example, a thin stainless steel plate or the like, and a valve body member by being pressed by the threaded ring 51. Sealing plate 5 between the upper end of 2
2 are formed by packings 53, 54 and the like sandwiching the second member 2. Thereby, the sealing plate 52 closes the conduction hole 23 in the Z direction. In this example, the upper end of the valve body member 2 is cut into a concave shape, and the sealing plate 52 and the threaded ring 51 are mounted therein. However, a cap that covers the upper end of the valve body member 2 with the threaded ring 51 is provided. And the sealing plate 52 is connected to the valve member 2
May be attached to the upper end of the.

The valve actuating mechanism 6 is mounted by screwing on a cylinder portion 31 extending above the spring receiver 3, and when actuated, breaks through the sealing plate 52 at the pointed end 65a of the needle member 65 to open and open a conductive hole. The internal pressure 23 is formed so as to be supplied to the open pressure receiving surface 25. In this example, the valve operating mechanism 6 is mounted on the main body 1 via the spring receiver 3. However, the upper end of the main body 1 extends outside the spring receiver 3 to extend upward, and the valve is directly connected to the main body 1. The operating mechanism 6 may be attached.

FIG. 2 shows an example of the structure of the valve operating mechanism. The valve operating mechanism 6 includes an outer cylinder 6 provided with a working gas inlet 61a.
1. An inner cylinder 62 inserted therein, a cover 63 screwed and mounted in the inner cylinder 62 so that a hole is made in a central portion and an upper end of the inner cylinder 62 is closed, and a slide in the inner cylinder 62 The operating ring 64, which is inserted so as to be able to be inserted and whose upper position in the counter-operating direction is restricted at the distal end of the cover 63, the needle as a needle provided to face the needle 65 and the sealing plate 52 attached thereto. A point 65 a, a spring 66 for urging the operating ring 64 upward in the counter-operating direction, a lot 67 with a ring inserted into a hole of the cover 63, a cap 68 for the operation thereof, Rod 6
7 is constituted by a sandwiching plate 69 for holding the position 7, a pin 69a for sealing the same, a chain 69b for locking, a screw 70 for attaching the same. An O-ring for sealing is provided at a required position.

In such a structure, the operating ring 64
Receives the pressure of the high-pressure CO ₂ starting gas line 104 shown in FIG. 5 as a fluid pressure, so that the tip 65 a passes through the sealing plate 52 so that the tip 65 a passes through the needle member 65.
It corresponds to a piston-like member for urging a. Also, rod 6
7, the cap 68, the sandwiching plate 69, and the like constitute an operation unit formed so as to bias the operation ring 64.

FIG. 4 is an explanatory view of the dimensional relationship of the valve body member 2 of the quick opening pressure regulating valve configured as described above and the pressure adjusting function thereby. In this figure, the sealing plate 52 shown in FIG.
Is broken, the conduction hole 23 conducts between the upper and lower sides, and the inlet pressure P ₁ is applied to the open pressure receiving surface 25.

The valve body member 2 has a central diameter d _{3 of} a contact portion of the valve seat as a dimension of the valve seat 13 and an outer diameter d as a dimension of the closing pressure receiving face 24 as dimensions of each part related to the pressure adjusting function.
₅ and an outer diameter d ₄ as a dimension of the open receiving pressure surface 25. The illustrated spring force F as each part size and urging force
And it is defined in relation to the pressure P ₂ of the outlet 12a becomes below a predetermined pressure. Note that d ₁ and d ₂ are the diameter of the conduction hole 23 on which the inlet pressure acts and the minimum diameter of the shaft portion of the valve element member 2 on which the outlet pressure acts, both of which are intermediate dimensions.

In order to construct the above relationship, P
_It is necessary to determine the above dimensions and the like so that the valve closes when the pressure exceeds a predetermined pressure. Therefore, the pressure at the inlet 11a is set to P
When the condition in Equation as _1, (valve closing force) ([pi / 4) ^{_{[P 1 (d 3 2 -d 1}} 2) + P 2 (d 5 2 -d 2 2) ] ≧ (π / 4) [ ^{_{P 1 (d 4 2 -d 1}} 2) + P 2 (d 3 2 -d 2 2) ] +
F (valve opening force) Thus, (π / 4) ^{_{[P 1 (d 3 2 -d 4}} 2) + P 2 (d 5 2 -d 3 2) ] ≧ F --- (1)

The left side of this equation is the total valve closing force due to pressure, and the right side is the valve opening force due to spring force. According to this equation, P ₁ is constant, F is because a constant force at a constant elongation and the spring constant is determined, if a larger d ₅ from d _3, the valve closing when P ₂ is increased Strength increases. Therefore, when determining the various dimensions and F relationship as in the above equation, close the valve the valve closing force by the pressure becomes greater than the spring force when the outlet pressure P ₂ is above a predetermined value, P ₂ is more P ₁ does not close, it is possible to restrict the outlet pressure P ₂ below a certain pressure of interest.

[0020] In this example, further, since the a dimension d ₄ dimensions d ₃ and the open pressure receiving surface of the valve seat to the same, the above formula, ([pi / 4) [P ^₂ (d _{5 2} -d ₃ ² )] ≧ F −−−−−− (2) In this way, by determining only d ₅ , d _3, and F, the outlet pressure can be limited to a target pressure or lower. Therefore, the design of the valve is facilitated. In addition, since the outlet pressure can be limited regardless of the inlet pressure, even if the inlet pressure decreases and the outlet pressure increases for some reason, backflow of the fluid to the inlet side can be prevented. Further, since the part related to the pressure adjustment is reduced, the operation stability is high, and the outlet pressure can be reliably limited,
The reliability of the valve is improved.

[0021] In FIG 4, when the sealing plate 52 is not open, not applied inlet pressure P ₁ is the open receiving section 25, because in the state of atmospheric pressure, d ₄ according to Equation (1) =
Since the state is 0, the valve closing force is sufficiently large, and the valve is reliably maintained in the closed state. At this time, the outlet pressure is naturally atmospheric pressure.

On the other hand, if the sealing plate 52 is broken in this state,
In the formula (1) or Formula (2), because regarded as P ₂ is substantially 0 if P ₁ is sufficiently greater than atmospheric pressure, d ₃ and d
If there is no very large difference between the ₄ and the same or d ₄ and d _3, only little spring force F is a valve force to become act, the valve is reliably opened. Then, the open state is maintained until the outlet pressure rises above a predetermined pressure. In this case, if the opening force of the valve is slightly large, the valve is fully opened, so that the opening / closing mechanism and the pressure adjusting mechanism do not increase the fluid resistance at all.

The quick-opening pressure regulating valve shown in FIG. 1 as described above is simple in structure and reliable in operation. FIG.
1 shows a schematic system of a nitrogen fire extinguisher, which is an example of an apparatus to which the quick-open pressure regulating valve of the present invention is applied. Nitrogen fire extinguisher
Nitrogen cylinder 100 filled with nitrogen that has been pressurized to a pressure of about 150 kgf / cm ² G at 40 ° C., a quick-opening pressure regulating valve 101 of the present invention attached thereto,
Starting CO ₂ cylinder 1 with a pressure of about 10kgf / cm ² G
02, a starter 103, a starting gas line 104, and a fire extinguisher line 1 which have the same structure as the valve operating mechanism of FIG. 2 and are operated by a solenoid or the like instead of the high-pressure inert gas.
05, a safety device 106, a main valve 107, a selection valve 108 for selecting a fire extinguishing section, an individual fire extinguishing line 109, a fire extinguishing section 110, and the like. Rapid opening pressure regulating valve, and d ₃ = d _4, for example, as ^{_{P 2 = 110kgf / cm 2 G}} , based on the equation (2), (π / 4 ) _{^{[110 (d 5 2 -d 3 2}} ) ] = F −−−−−−− (3) Here, d ₅ and d ₃ are cm, F
Is kgf.

The quick opening pressure regulating valve having the above configuration operates as follows. The nitrogen cylinder 10
An inlet pressure P _{1 of} 0 to about 150 kgf / cm ² G is applied, and the sealing plate 52 is not broken. Therefore, in the equation (1), a large valve closing force of P ₁ d ₃ ² π / 4 acts on d ₄ = 0, and the valve is reliably closed. In this state, for example, if a fire occurs in any fire extinguishing section, the starter 103 is operated and the CO ₂ cylinder 1
From 02, a working gas having a pressure of about 110 kgf / cm ² G is introduced into the valve operating mechanism 6 of the quick opening pressure regulating valve 101 via a starting gas line 104.

In the valve operating mechanism 6, the working gas is supplied to the outer cylinder 61,
The gas is introduced into the upper part of the operating ring 64 through the through holes formed in the inner cylinder 62 and the cover 63, and gas pressure is generated between the operating ring 64 and the rod 67. The tip 65a is pushed down and the sealing plate 5
Open it breaks through the 2, nitrogen enters the upper end portion via the conducting hole 23 from the inlet 11a immediately applying a pressure P ₁ in the open pressure-receiving surface 25 formed between the inner cylinder 62 and the spring receiving 3 . On the other hand, since d ₃ and d ₄ are both effective and the P ₁ part of the equation (1) becomes 0 and the outlet pressure P ₂ is also the atmospheric pressure, the valve opening / closing force due to the pressure is almost eliminated, and the spring force F causes The valve member 2 is securely pushed down, and the valve opens instantaneously. As a result, nitrogen is quickly flown below the fire extinguishing line 105 to fill the fire extinguishing compartment and exhibit a fire extinguishing effect.

On the other hand, when the valve opens, for example, the main valve 10
7 and the selection valve 108 are closed, the pressure of the fire extinguishing source line 105 increases, and as a result, the pressure of the outlet 12a of the quick opening pressure regulating valve 101 increases. However, when this pressure becomes 110 kgf / cm ² , the force and the valve opening / closing force balance with the outlet pressure because the dimensions and the spring force are determined as in equation (3), and when the pressure exceeds 110 kgf / cm ² , The valve closing force due to the pressure overcomes the spring force to close the valve. As a result, an excessive increase in the outlet side pressure of 110 kgf / cm ² G or more is prevented.

FIG. 6 shows an example of the structure of another quick opening pressure regulating valve to which the present invention is applied. This quick-opening pressure regulating valve is different from that of FIG. 1 mainly in that the valve body member 2 has a passage that connects one end side communicating with the inlet 11a of the valve body member 2 to the other end side communicating with the open receiving pressure surface 25. A lateral conduction hole 14 and a side conduction hole 15 as passages provided in the main body 1 are provided instead of the conduction hole 23 provided. The space between the two conduction holes is closed by a sealing plate 52 as in FIG. In this example, the sealing plate 52 is pressed and supported by the inner cylinder 62 of the valve operating mechanism 6, and the conduction between the conduction holes 14 and 15 is conducted by the hole 62a opened in the inner cylinder 62, and the cover 3 'is formed. The pressure receiving surface 25 is closed. In addition, spring support 3
Is screwed into the inner surface of the main body 1. The reinforcing ring 11c of FIG. 1 is not used.

Also in this example, the valve operating mechanism 6 is operated and the sealing plate 52 is breached in the same manner as in FIG.
The gas pressure of the horizontal conduction hole 14, the sealing plate 52, the hole 62
a, The valve body member 2 is actuated by the force of the spring 4 to instantaneously act on the open pressure receiving surface 25 via the side conduction hole 15 to open the valve. When the pressure on the outlet 12a side becomes equal to or higher than a predetermined pressure when the valve is opened, the pressure on the closed pressure receiving surface 24 increases,
The valve closing force is greater than the valve opening force, and the valve is closed to prevent further pressure increase. According to the quick opening pressure regulating valve of this embodiment, since the valve operating mechanism 6 can be arranged in a direction perpendicular to the valve body member 2, there is an advantage that the overall shape of the quick opening pressure regulating valve can be reduced in size.

As described above, the quick-opening pressure regulating valve normally operates with the gas pressure from the starting gas line 104. However, a failure or the like occurs in the starting system, and the working gas is supplied to the valve operating mechanism 6 of the quick-opening pressure regulating valve. When not supplied, the valve can be opened directly by manual operation. At this time, the sealing pin 69a is pulled out, the chain locking side of the sandwiching plate 69 is pulled out, and the cap 68 is pushed down to push down the operating ring 64 via the rod 67, thereby lowering the point 65a of the needle member. Thus, the sealing plate 52 can be broken. As a result, even if there is a failure in the starter system, it is possible to supply nitrogen immediately and reliably by hand and fire extinguishing work can be performed.

According to such a rapid-opening pressure regulating valve, when the fire is to be extinguished, the valve can be quickly and reliably opened to supply nitrogen, and the pressure on the outlet side is set to a predetermined pressure, for example, 110
kgf / cm ² G or less. Therefore, the pressure resistance of all fire extinguishing systems such as piping and valves on the outlet
₍₂₎ There is no need to raise the pressure to 110 kgf / cm ² G or more, which is the same as in the case of fire extinguishing systems. As a result, it is possible to use a nitrogen fire extinguisher with a large fire extinguishing ability of, for example, 150 kgf / cm ² G without increasing equipment costs.

As the nitrogen fire extinguisher, for example, 20
A pressure of about 0 kgf / cm ² G can also be used. In addition to the nitrogen fire extinguisher, the quick-opening pressure regulating valve can be widely used for other inert gas fire extinguishers, high-pressure gas cylinders and the like. 7 and 8 show still another example of the structure of the quick opening pressure regulating valve. The quick-opening pressure regulating valve according to the present embodiment includes a main body 1, a middle body 10, which is screwed into the inside of the main body 1, and is configured to function as a main body integrally with the main body 1, a valve body member 2, and a lateral conduction as a passage. Hole 14, communication hole 16 and upper hole 23
', A spring receiver 3 as a receiving member, a moving spring receiver 9 also as a movement receiving part, a spring 4 as an urging member, a sealing plate mechanism 5 as sealing means also shown in detail in FIG. As means, it has a valve operating mechanism 6, a positioning part 17 and the like shown in FIG. In the drawing, the state in which the moving spring receiver 9 is in the upper position and the valve element member 2 closes the valve element 22 is shown on the right side of the center line C, and the spring receiver 9 is in the lower position and the valve element 22 is The open state is shown on the left.

As shown in FIG. 1, the main body 1 has an inlet nozzle 11 which forms an inlet 11a and an outlet 12a for high-pressure nitrogen.
And an outlet nozzle section 12 and the like. In the valve of this embodiment, the middle body 10 is provided inside the main body 1 from the viewpoint of manufacturability and the like, thereby supporting and guiding the valve body member 2 and the like, and the lower end thereof being a valve seat 13 portion. However, it goes without saying that the middle body 10 and the main body may be made of the same member as shown in FIG. The main body 1 is provided with a pressure gauge seat, a needle valve seat for pressure restriction, a safety plug seat, and the like as necessary, but is not shown as in the case of FIG.

The valve member 2 has substantially the same structure as that of FIG. In FIG. 1, the conduction hole 23 is directly conducted from one end to the other end via the sealing plate 52. However, in this embodiment, as described above, the lateral conduction hole 14, the sealing plate 52 and the communication conduction are formed. It conducts through the hole 16. However, it goes without saying that the passage and the sealing plate mechanism as shown in FIG. 1 can be adopted for the valve having the structure of this embodiment.

In this embodiment, the spring receiver 3 is mounted on the outer side of the upper end of the inner body 10 by being screwed in, and is supported by the moving spring receiver 9 to support the reaction force of the spring 4. I have. That is, as described later, after the sealing plate 52 is opened, the introduced pressure on the valve inlet side is received in the space between the movable spring receiver 9 and the pressure is generated in the movable spring receiver, whereby the movable spring receiver is generated. 9 supports the force of the spring 4. On the other hand, before opening, as shown on the right side of the center line C in FIGS. 8 and 9, the upper end of the movable spring receiver 9 is received so that the spring 4 is almost completely extended. In addition,
In this case, the upper end of the moving spring receiver 9 and the contact surface of the spring receiver 3 may be in a state where a slight gap is formed, or may be in contact to the extent that some spring force remains.

Further, necessary portions are sealed by an O-ring 8 so that the valve member 2 can slide in an airtight state. In this example, the moving spring receiver 9 is guided by the middle body 10 for movement. However, the upper end of the middle body 10 is made to have a large diameter, and the spring receiver 3 is screwed inside the moving body. It may be a structure for guiding. The spring 4 is interposed between the moving spring receiver 3 and the spring receiving portion 26 of the valve body member 2 and urges the valve body member 2 in the Z ′ direction as in FIG.

The movable spring receiver 9 is interposed between the spring receiver 3 and the spring 4, and in this example, is guided by the middle body 10 integral with the main body 1 so as to be movable in the opening / closing direction Z-Z '. It has a pressure receiving surface 9a which receives the same pressure as the surface 25. When the pressure receiving surface 9a moves to a lower position L which is a predetermined position in the opening direction of Z ', it is stopped by the positioning portion 17 and the urging force F is generated by the spring 4.
That is, the movable spring receiver 9 is inside the spring receiver 3 and newly operates as a substantial spring receiver. The positioning portion 17 may be screwed in, or a thin adjustment member may be provided on the positioning portion 17.
May be adjustable.

The lateral conduction hole 14, the communication conduction hole 16 and the upper conduction hole 23 'are connected to the nitrogen inlet 11 of the valve member 2 at one end.
It is a passage for conducting between the a side and the open pressure receiving surface 25 at the upper end of the valve body member 2 on the other end side. Communication conduction hole 1 as in this example
1 and the use of the upper conducting hole 23 'provided in the valve body member 2, it becomes unnecessary to provide a separate space for the passage in the upper part of the valve as in the case of FIG. The diameter can be reduced. However, a passage as shown in FIG. 6 can be adopted.

FIG. 9A shows the structure of the sealing mechanism 5. 3 is substantially the same as that shown in FIG. 3, but in the present example, a gas supply port 55 is provided at the tip of the threaded ring 51. In addition, the outside of the nozzle part constituting the sealing mechanism 5 is a screw 56. Therefore, FIG.
A screw 62a is cut inside the distal end portion of the inner cylinder 62 of the valve actuation mechanism 6 shown in (b), and this is screwed into the screw 56 of the nozzle part from outside. However, this portion may have a screw structure as shown in FIG. Other structures of the valve operating mechanism 6 are exactly the same as those in FIG.

FIG. 10 shows the relationship between the pressure applied to the valve element 2 of the quick release pressure regulating valve shown in FIGS. 7 and 8, and FIG. 10 (a) is a view corresponding to FIG. , (B) shows the state before opening. When the sealing plate 52 is ruptured, the gas at the inlet 11a sequentially flows through the lateral conduction hole 1 in the rapid opening pressure regulating valve of this example.
4, air openings 55, contact the conductive hole 16, flows to the pressure receiving surface 9a of the upper conductive open pressure receiving surface through the opening 23 '25 and moving the spring receiver 9, the pressure P ₁ on these, as shown in (a) Works. As a result, on the pressure receiving surface 9a side, the pressure P
_{When the} moving spring receiver 9 is pushed down by ₁ and lowers to the predetermined position L while compressing the spring 4, it hits the positioning portion 17 of the middle body 10 and stops. At this time, the spring 4 compressed by the moving spring receiver 9 applies a spring force F to the valve body 2 in the opening direction. This to the effect of the force applied to open the pressure-receiving surface 25 by the spring force F and the pressure P _1, for the total force relationship applied to the valve body member 2 including these, made as described in FIG.
In the valve of this example, the pressure on the outlet side is controlled by the equations (1) and (2).

Before opening the sealing plate 52 shown in FIG.
When the pressure of the nitrogen cylinder 100 is high, high pressure P _1, whereas the pressure in the outlet 12a side for the valve seat 13 is closed the valve contacts the valve body 22 is in a low atmospheric pressure P ₀ . As a result, as shown in the above equation (1), the pressure P ₁
Is sufficiently larger than the valve opening force F by the spring, so that the valve can be closed. However, when P ₁ becomes lower than a certain pressure, in the case of the valve of FIG. 1, the valve closing force due to this becomes smaller than the valve releasing force due to the spring force F, and the valve opens. For example, P ₁ as described above is 150 kgf / cm
According to P ₂ by ² the spring force F at the time of controlling the 110 kgf / cm ² or less of pressure, about 1/3 or 50 when P ₁ is a maximum
It becomes about kgf / cm ^2, towards the valve opening force due to the spring force F becomes larger than the valve closing force according to P _1. And the valve will open unnecessarily.

[0041] However, according to the rapid opening pressure regulating valve of the present embodiment, the force compressing the spring 4 by becoming as (b), the pressure atmospheric pressure P ₀ which acts on the pressure receiving surface 9a of the movable spring bearing 9 There is released, it moves the spring bearing 9 is raised to a position H to be F ₀ it is substantially zero from the position L to F generate a spring force. As a result, the force of the spring 4 hardly acts on the spring receiving portion 26 of the valve body 2, and the closed state of the valve is maintained unless the sealing plate is broken. It should be noted that P ₀ ,
The arrow of F ₀ indicates the direction of pressure and force, and the magnitude is almost 0 as described above.

According to such a quick release pressure regulating valve, even when the pressure of the nitrogen cylinder 100 decreases, it is possible to prevent nitrogen from flowing out to the outlet line. As shown in FIG. 5, even when the valve is opened and nitrogen enters the outlet line, unnecessary extinguishing of the extinguishing gas into the extinguishing zone is prevented by the main valve 107 and the selection valve 108 in the extinguishing system. So there is no danger. Further, according to the valve of this example, when the nitrogen cylinder 100 is filled with nitrogen at the time of shipment from the factory, the valve closes as soon as the pressure inside the cylinder increases even a little due to the resistance of the valve. Nitrogen can be filled in a closed state or a state in which the cap is slightly covered, and the handleability of the valve can be improved.

[0043]

As described above, according to the present invention, according to the first aspect of the present invention, the quick opening pressure regulating valve comprises a main body, a valve body member,
The receiving member, the urging member, the sealing means and the sealing pressure releasing means are combined, and a passage is provided in the valve body member or the main body for conducting between one end side and the other end side of the valve body member. Side is connected to the inlet of the main body, the passage to the other end is closed by a sealing member of the sealing means, the valve seat dimension of the main body, the closed pressure receiving surface dimension of the valve member, the open pressure receiving surface located at the other end side. The size and the urging force of the urging member are determined so that the pressure at the outlet of the main body becomes equal to or less than a predetermined pressure. The valve member opens and closes as follows depending on each condition.

First, when the pressure-sealing means does not operate and the other end is closed by the pressure-sealing member, the open pressure-receiving surface does not operate, so that the force of the inlet pressure acting on the valve member in the closing direction is urged. It becomes larger than the urging force of the member, and the closed state of the valve body member is maintained.

Next, when the sealing means is operated, the sealing member closing the passage to the other end side is opened, and the inlet pressure is applied to the open pressure receiving surface, which reduces the closing pressure at the valve member inlet portion. By releasing or reducing the pressure, the urging force of the urging member is made effective and the valve body member can be reliably opened.

Further, when the outlet pressure increases in this state, the pressure of the closing pressure receiving surface becomes larger than the urging force of the urging member, the valve is closed, and the rise of the outlet pressure beyond a certain level can be restricted. As a result, even if the fluid inlet pressure is high, the outlet pressure can be reduced to a predetermined pressure or less, and the pressure resistance of piping, valves, and the like can be reduced to that pressure. And, for example,
Maintain a value of 110 kgf / cm ² G as the outlet pressure corresponding to the design pressure of the conventional fire extinguishing system, that is, a large fire extinguishing ability at a high pressure of about 150 kgf / cm ² G or more without increasing the cost of piping systems etc. The adoption of a nitrogen fire extinguisher can be enabled.

According to the second aspect of the present invention, in addition to the above, since the dimensions of the valve seat and the dimension of the pressure receiving surface are the same, the opening / closing force of the valve body member is reduced by the outlet pressure and the dimensions of the valve seat. Since it is determined by the size of the closing pressure receiving surface and the urging force of the urging member,
The design of the valve becomes easier. In addition, since the outlet pressure can be limited irrespective of the inlet pressure, it is possible to prevent the backflow of the fluid to the inlet side when the outlet pressure increases. Further, since the portion related to the pressure adjustment is reduced, the operation stability of the valve is increased, the outlet pressure can be reliably restricted, and the reliability of the valve can be improved.

According to the third aspect of the present invention, in addition to the effect of the first aspect of the present invention, a piston-like member which operates as a sealing-release means by a fluid pressure a needle provided to face the sealing member. , Which can be operated by the operation unit, so that the sealing member can be remotely operated by the fluid pressure, and even if a failure occurs in the fluid pressure line, the sealing member is manually opened and closed by the machine side. It is possible to improve the safety of the device.

According to the fourth aspect of the present invention, a moving receiving portion having a pressure receiving surface for receiving the same pressure as the open pressure receiving surface is provided between the receiving member and the urging member, and the movable receiving portion is guided to be movable in the opening and closing directions. When the sealing pressure is released, the pressure receiving surface receives the pressure to move the movement receiving portion to a predetermined position in the opening direction, and a positioning portion is provided so as to stop at this position. The urging force can be generated in the urging member at the position. As a result, the outlet pressure can be controlled to a predetermined pressure or less by the same operation as the first aspect of the invention.

On the other hand, when the sealing pressure has not been released,
Since the pressure receiving surface does not receive the pressure, no force for moving the movement receiving portion to the predetermined position is generated, and the movement receiving portion freely moves in the direction opposite to the predetermined position by receiving the reaction force of the urging member. I do. As a result, the urging force of the urging member is not generated, and the valve body member is not urged in the opening direction by the urging member. As a result, unnecessary opening of the valve due to the urging force of the urging member is prevented even when the fluid pressure on the inlet side decreases. Also, when filling a fire extinguishing gas container or the like equipped with a quick-opening pressure regulating valve with gas, the gas can be filled without completely closing the outlet side, so that the handling of the device can be improved. it can.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of the entire structure of a quick-open pressure regulating valve to which the present invention is applied.

FIGS. 2A and 2B show an example of a valve operating mechanism of the rapid opening pressure regulating valve, wherein FIG. 2A is a plan view and FIG. 2B is a longitudinal sectional view.

FIG. 3 is a partial cross-sectional view showing a structural example of a pressure-sealed portion of the quick-open pressure regulator.

FIG. 4 is an explanatory diagram of a relationship between forces applied to respective portions of a valve member of the quick opening pressure regulating valve.

FIG. 5 is a system diagram showing an example of a nitrogen fire extinguisher, which is an apparatus to which the above-mentioned quick-open pressure regulator can be applied.

FIG. 6 is a longitudinal sectional view showing another example of the quick-opening pressure regulating valve to which the present invention is applied.

FIG. 7 is a longitudinal sectional view showing still another example of the quick-open pressure regulating valve to which the present invention is applied.

FIG. 8 is a longitudinal sectional view of the valve in a different direction from the above.

9A is an enlarged sectional view of a sealing plate mechanism, and FIG. 9B is a sectional view of a valve operating mechanism for this mechanism.

FIGS. 10A and 10B are explanatory diagrams of a relationship between forces applied to respective parts of a valve body member of the quick opening pressure regulating valve, wherein FIG. 10A shows a state after opening and FIG. 10B shows a state before opening.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body 2 Valve body member 3 Spring receiving (receiving member) 4 Spring (biasing member) 5 Sealing plate mechanism (sealing means) 6 Valve operating mechanism (sealing pressure releasing means) 9 Moving spring receiver (receiving part, movement receiving part) 9a Pressure receiving surface 11a Nitrogen inlet (fluid inlet) 12a Nitrogen outlet (fluid outlet) 13 Valve seat 14 Lateral conduction hole (passage) 15 Side conduction hole (passage) 16 Communication conduction hole (passage) 17 Projecting surface (Positioning part) 23 Conducting hole (passage) 23 'Upper conducting hole (passage) 24 Closed pressure receiving surface 25 Open received pressure surface 52 Sealing plate (Pressing member) 64 Operating ring (Piston-like member) 65a Tip (needle portion) 67 Rod (Operating part) 68 Cap (Operating part) 69 Clamping plate (Operating part) d ₃ Center diameter of contact part of valve seat (Dimension of valve seat) d ₅ Outer diameter (Dimension of closed pressure receiving surface) d ₄ Outer diameter (Open) dimension) F spring force of the pressure receiving surface (urging force) P ₂ outlet pressure of Lower position (predetermined position) Z opening direction Z'closing direction

Claims (4)

[Claims] A body having an inlet and an outlet for a fluid and a valve seat; a valve body having one end and the other end that is opened and closed at the one end while being in contact with and separated from the valve seat; A valve body member having a closed pressure receiving surface for receiving pressure in the closing direction and an open pressure receiving surface formed on the other end side for receiving pressure in the opening direction and guided by the main body so as to be movable in the opening and closing directions; A passage connecting between the receiving member and the other end, a receiving member attached to the main body, and a urging member interposed between the receiving member and the valve member to urge the valve member in the opening direction. A pressure member having a pressure member mounted to close the passage, and a pressure member in the passage being opened to supply pressure in the passage to the open pressure receiving surface when actuated. And a sealing release means attached to the main body, the size of the valve seat and A quick-opening pressure regulating valve, wherein the size of the closed pressure receiving surface, the size of the open pressure receiving surface, and the urging force of the urging member are determined so that the pressure at the outlet becomes equal to or less than a predetermined pressure. 2. The quick-opening pressure regulating valve according to claim 1, wherein the size of the valve seat and the size of the open pressure receiving surface are the same. 3. The sealing pressure releasing means includes: a needle portion provided to face the sealing member; and a needle portion configured to receive the fluid pressure so that the needle portion penetrates the sealing member. 2. The quick-open pressure regulating valve according to claim 1, comprising a piston-like member to be urged, and an operation portion formed so as to urge the piston-like member. 4. A pressure receiving surface which is interposed between the receiving member and the urging member and is movably guided in the opening and closing direction and receives the same pressure as the open pressure receiving surface and moves to a predetermined position in the opening direction. And a positioning portion provided on the main body so as to stop the movement / movement receiving portion at the predetermined position when the biasing means generates the biasing force. The quick opening pressure regulating valve according to claim 1.