JPH03177666A - Safety valve device and multiple way valve with safety valve device - Google Patents

Abstract

PURPOSE:To correspond to both inner pressure and inner negative pressure by forming a large valve disk provided with an aperture at its center separable from the valve seat of a safety valve device body, and providing a small valve disk for opening/closing the aperture of the large valve disk. CONSTITUTION:A valve seat 3 is additionally provided at the upper opening 2 of a safety valve device body 1. A large valve disk 7 is placed on the valve seat 3 through an O-ring 6, pierced with a supporting bolt 5 and energized in the seated direction by a spring 13. An aperture 9 is bored at the center of the large valve disk 7, and a small valve body 10 for opening/closing the aperture 9 is supported by a valve stem 11. The valve stem 11 is further supported at the upper end of the spring 13. The safety valve device body 1 is fitted at a tank, and when pressure in the tank rises, the large valve disk 7 and small valve disk 10 are lifted integrally so as to be separated from the valve seat 3, thus releasing pressure. When the tank inner pressure becomes negative pressure, the small valve disk 10 is sucked into the body 1, and the aperture 9 is opened to release negative pressure. The tank can be therefore protected safely.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a safety device valve and a safety device valve material multi-way valve that are installed in pipelines, chemical tanks, etc.

(Prior art) Conventional safety valves have, for example, a valve body placed on the upper opening of the valve body, and this valve element acts to always close the upper opening by the spring of a spring, and the safety valve is attached to a tank, etc. When the internal pressure of the valve body rises above a predetermined value, the valve body is pushed upward against the spring force, and the upper opening of the valve body is opened.

In addition, in liquid suction pipes and liquid blow-off pipes installed in chemical liquid tanks, etc., the liquid suction valve and liquid blow-off valve installed in these pipes have conventionally been installed inside the pipe with a valve body that operates in the vertical direction. The opening in the valve seat was arranged to open and close.

(Problem to be Solved by the Invention) Therefore, in the safety valve, when the internal pressure rises above a predetermined value, the valve body operates and functions as a safety valve. When the internal pressure of a pipeline or the like becomes a negative pressure below a predetermined value, its structure does not impede its function as a safety valve against negative pressure.

Furthermore, in the liquid suction valves and liquid blow-off valves installed in the liquid suction pipes and liquid blow-off pipes, the valve body operates in the vertical direction to open and close the opening of the valve seat installed inside the pipe. ,
If the liquid attached to the valve seat or valve element does not drip easily, and the valve element remains in contact with the valve seat for a long period of time, the adhered liquid may cause the valve element and valve seat to adhere to each other, causing malfunction. there were.

Therefore, the present invention was developed in view of the above points, and its purpose is to prevent pressure inside the valve body not only when the pressure is above a certain level but also when the pressure falls below a certain negative pressure. The present invention provides a safety device valve in which the valve body operates and exhibits a safety function even when the valve element is activated, and also has an open-hole valve seat that has the above-mentioned safety function and is disposed in a fluid suction passage and a fluid discharge passage. It is an object of the present invention to provide a multi-way valve with a safety device valve material capable of preventing adhesion with an open-hole opening/closing valve body due to adhering fluid.

(Means for Solving the Problems) In order to effectively achieve the above object, the present invention has the following configuration. In other words, a large valve body with a hole in the center is supported and mounted on a valve seat provided at the upper opening of the safety device valve body, and the small valve body has a valve stem in the center. A valve body is provided on the side of the safety device valve body of the opening of the large valve body so as to be movable up and down by an actuating means so that the opening of the large valve body can be opened and closed. A breathable cover that covers the upper opening of the valve body, has an internal space that can freely accommodate the valve stems of the large valve element and the small valve element, and has a hole formed in the upper part from which the tip of the valve stem projects. This is the structure of a safety device valve characterized by a structure in which a cap is attached to the hole through which the valve stem is inserted, and a cap is detachably attached to the hole to close the hole through which the valve stem is inserted.

Further, a valve body is formed which has upper and lower passages that communicate in the vertical direction, and a fluid suction passage and a fluid blowout passage that communicate with the upper and lower passages and extend in the horizontal direction, and an opening in the upper passage of the valve body. A large valve body with an opening formed in the center is supported and placed on a valve seat provided in the center so as to be movable up and down, and a small valve body having a valve stem in the center is placed on a valve seat provided in A hole safety device is provided on the valve body side so as to be movable up and down by an actuating means to open and close the opening of the large valve body, and the large valve body and the small valve are placed above the opening of the upper passage and cover the opening. A ventilated cover is attached, which has an internal space that can freely accommodate the valve stem of the body and has a hole formed in the upper part from which the tip of the valve stem projects, and seals the hole through which the valve stem is inserted. A suction valve is provided in which a cap is removably attached to the hole, and a suction valve body is horizontally operated by an actuating means in a valve seat disposed in the fluid suction passage, and the opening in the valve seat is opened and closed. furthermore, an elbow-shaped suction pipe is connected to the fluid suction passage through the valve seat, and the suction pipe has an opening through which the tip of the valve stem of the suction valve body can protrude to the outside; A cap is removably attached to the suction pipe so that the tip of the valve stem protruding from the opening can move horizontally to close the opening, and a blow-out valve body is actuated by a valve seat disposed inside the fluid blow-out passage. A blow-out valve configured to operate in a horizontal direction by a means is provided to open and close an opening in the valve seat, and an elbow-shaped blow-off pipe is connected to the fluid blow-out passage through the valve seat. A hole is formed in the pipe through which the tip of the valve stem of the blow-off valve body can protrude to the outside, and a cap is attached to and removed from the blow-off pipe, and the tip of the valve stem protruding from the hole can move horizontally to close the hole. This is a configuration of a multi-way valve with a safety device valve material, which is characterized by a freely provided configuration.

(Function) In the safety device valve configured as described above, when the pressure inside the safety device valve body exceeds a certain level, the large valve body moves up together with the small valve body via the actuating means and separates from the valve seat.

Then, by opening the upper opening of the safety device valve body, it is possible to protect a chemical tank or the like to which the safety device valve is attached.

In addition, when the inside of the safety device valve body becomes negative pressure below a certain level, the small valve body that had closed the upper opening of the safety device valve body together with the large valve body is sucked inside the safety device valve body through the actuating means.
By opening the hole in the large valve body, it is possible to protect pipelines, chemical tanks, etc. equipped with this safety device valve even against negative pressure below a certain level.

Further, in the safety device valve material multi-way valve having the above structure, the safety device valve acts in the same manner as described above to protect the chemical tank or the like to which this valve is attached. Furthermore, the suction valve body and the discharge valve body are configured to operate in the horizontal direction with respect to each valve seat of the suction valve and the discharge valve provided in each passage of the valve body having a fluid suction passage and a fluid discharge passage extending in the horizontal direction. The fluid (liquid) attached to each valve body or valve seat tends to drip downward (,
By minimizing the amount of fluid adhering to the valve body and valve seat, it is possible to prevent the valve body and valve seat from adhering to each other due to fluid.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a sectional view of a safety device valve A according to an embodiment of the present invention, in which 1 is a tubular safety valve device main body, and an upper opening 2
A valve seat 3 is attached in the form of a flange. Further, the valve seat 3 is provided with threaded holes 4 at predetermined intervals over the entire circumference. A tip of a support port 5, which will be described later, is screwed into each screw hole 4.

Therefore, the large valve body 7 is connected to the valve seat 3 via the O-ring 6.
is placed 'R', and the valve seat 3 is located near the outer periphery of the large valve body 7.
Through-holes 8 are bored at positions that match the positions of the respective screw holes. The diameter of each through hole 8 is larger than the diameter of the support port 5,
Each support port 5 is loosely fitted into the through hole 8 of the large valve body 7 and screwed into the screw hole 4. As described above, the large valve body 7 is mounted on the valve seat 3 so as to be movable up and down, and when the large valve body 7 separates from the valve seat 3, the upper opening 2 of the safety valve device main body l is opened, and the valve seat 3 to close the upper opening 2.

Further, in the center of the large valve body 7, an aperture 9 that is slightly smaller than the upper opening 2 of the safety device valve l is bored, and furthermore, in the center of this aperture 9, there is a valve of a small valve body 10, which will be described later. A through hole 12 is formed through which the rod 11 is inserted, and the valve rod 1 is formed together with the small valve body 10.
Spring receiving portion 14 of spring 13 which is one actuating means supporting 1
is a pretense.

A hole 15 communicating with the aperture 9 is bored on the outer periphery of the spring receiving portion 14 .

The small valve body 10 seals the opening 9 of the large valve body 7, and the large valve body 10 is connected from the safety device valve body 1 side through an O-ring 16 attached near the outer periphery of the upper surface of the small valve body 10. body 7
It is designed so that it comes into contact with the bottom surface of the. The tip of a valve stem 11 is screwed into the center of the small valve body 10, and the valve stem 11 is arranged to be inserted through the through hole 12.

A double nut 17 is screwed into the center of the valve stem 11 inserted through the through hole 12, and the upper end of the spring 13 placed on the spring receiver 14 is brought into contact with the double nut 17 via a washer 18. It is. The spring 13 pushes the valve stem 11 upward, and the small valve element 10 provided at the lower end of the valve stem 11 comes into contact with the large valve element 7. Normally, the small valve body 10 closes the opening 9 of the large valve body 7.

A breathable cover 19 is attached to the upper part of the safety device valve body 1. This cover 19 covers the upper opening 2 of the safety device valve body 1, has an internal space 20 in which the valve stems 11 of the large valve body 7 and the small valve body 10 can be accommodated in a freely operable manner, and has the valve stem in the center of the upper part. A hole 22 is drilled so that the tip 21 of 11 can protrude. A cylindrical body 24 having a threaded portion 23 formed on its upper outer peripheral surface projects outwardly from the hole 22 . The tip 21 of the valve stem 11, pushed upward by the spring 13, protrudes from the cylindrical body 24. Further, the cylindrical body 24 from which the tip 21 of the valve stem 11 protrudes is removably provided with a cap 26 having an internal space 25 for accommodating the tip 21 of the valve stem 11. Further, in this embodiment, a 40-mesh net member 27 is attached to the side surface of the cover 19 to provide ventilation as described above.

28 is a steam supply pipe that keeps the safety device valve body 1 warm and prevents fluids such as chemical solutions from adhering inside the valve body 1, and is attached to cover the outer peripheral surface of the safety device valve body 1. be.

In the safety device valve having the above configuration, when the internal pressure inside the safety device valve body 1 reaches a certain level or more, the large valve body 7
is pushed upward together with the small valve body 10, and the safety device valve body 1
The upper opening 2 of is open.

This makes it possible to avoid the risk of explosion due to an increase in the internal pressure of a chemical tank or the like equipped with this safety device valve.

Further, in this safety device valve, when the inside of the safety device valve body 1 becomes negative pressure below a certain level, the small valve body 10 is sucked inside the safety device valve body 1 against the elasticity of the spring 13, Large valve body 7
The opening 9 will be opened. As a result, atmospheric air is sucked through the breathable cover 19, and the abnormal negative pressure within the safety device valve body 1 is returned to a normal value. Then, the opening 9 of the large valve body 7 is closed by the small valve body IO by the spring 13 again.

FIG. 2 shows a multi-way valve B equipped with the above-mentioned safety device valve A, in which the valve body 29 has upper and lower passages 30 and 30 communicating in the vertical direction.
31, and a fluid suction passage 32 and a fluid blowout passage 33 that communicate with the upper and lower nuclear passages 30 and 31 and extend in the horizontal direction.

The upper opening 34 of the main passage 30 of the valve body 29 is provided with a safety device valve A having the above-mentioned configuration (the description is omitted because the configuration is the same).

Further, the fluid suction passage 32 is provided with a suction valve 35 . That is, the suction valve body 36 of the suction valve 35 is provided in the fluid suction passage 32 so as to be able to operate in the horizontal direction to open and close the fluid suction opening 38 of the valve seat 37 provided inside the fluid suction passage 32 .

The suction valve body 36 has a valve stem 39 in the center, and this valve stem 39 is fixed once. Also, the portion 40 that comes into contact with the valve seat 37
is made of Teflon material.

Further, the valve seat 37 has a hole 41 formed in the center thereof through which the valve rod 39 is inserted, and the above-described fluid suction hole 38 is bored around the hole 41 .

The suction valve body 36 is inserted into the valve seat 3 from the fluid outlet passage 33 side.
The valve stem 39 inserted through the hole 41 is normally brought into contact with the valve seat 37 by the spring of a spring 42 which is an operating means. For that reason spring 4
2 has one end in contact with a double nut 43 provided at the center of the valve stem 39 via a washer 44, and the other end in contact with the valve seat 37.

An elbow-shaped suction pipe 45 is provided in the fluid suction passage 32 via the valve seat 37. The valve seat 37 is
It is sandwiched between a flange 46 provided at one end of the fluid suction passage 32 and a flange 47 provided at one end of the suction pipe 45, and is detachably attached to the end of the fluid suction passage 32 with bolts and nuts (not shown).

The suction pipe 45 has a valve stem tip 48 of the suction valve body 36.
An opening 49 is provided along the line of the valve stem 39 so that the valve stem 39 can protrude to the outside. A cylindrical body 50 having a length such that the valve stem tip 48 protrudes is attached to the outside of this opening 49, and furthermore, this cylindrical body 50
A cap 52 having an internal space 51 in which the protruding valve stem tip 48 can move horizontally is removably screwed onto the cap 52 .

53 is a fluid inlet.

On the other hand, the fluid blowing passage 33 is provided with a blowing valve 54 . That is, a blowout valve body 55 of a blowout valve 54 is provided in the fluid blowout passage 33 so as to be able to operate in the horizontal direction to open and close a fluid blowout opening 57 of a valve seat 56 provided inside the fluid blowout passage 33 .

The blow-out valve body 55 has a valve stem 58 in the center, and this valve stem 58 is fixed once. Also, a portion 59 that comes into contact with the valve seat 56
is made of Teflon material.

Further, the valve seat 56 has a hole 60 formed in the center thereof, through which the valve stem 58 is inserted, and the above-mentioned fluid blowout hole 57 is bored around the hole 60 .

The blow-off valve body 55 is disposed so as to come into contact with the valve seat 56 from the outlet side of the fluid blow-off passage 33, and the valve stem 58 inserted through the hole 60 is normally operated by the elasticity of a spring 62, which is an operating means. It is designed to abut against the valve seat 56. For this purpose, the spring 62 is attached to a double nut 6 provided in the center of the valve stem 58.
3 through a washer 64, and the other end is in contact with the valve seat 5.
It is in contact with 6.

An elbow-shaped blowout pipe 65 is provided in the fluid blowout passage 33 via the valve seat 56. The valve seat 56 is
It is sandwiched between a flange 66 provided at one end of the fluid blowing passage 33 and a flange 67 provided at one end of the blowing pipe 54, and is detachably attached to the end of the fluid blowing passage 33 by means of bolts and nuts (not shown).

The outlet pipe 65 includes a valve stem tip 58 of the outlet valve body 55.
An aperture 68 is provided along the line of the valve stem 58 so that the valve stem 58 can protrude to the outside. A cylindrical body 70 having a length such that the valve stem tip 69 protrudes is attached to this opening 68, and furthermore, this cylindrical body 70 includes:
A cap 72 having an internal space 71 in which a protruding valve stem tip 69 can move horizontally is screwed onto the cap 72 in a detachable manner. 73 is a fluid outlet.

In the safety device valve body valve B having the above-described structure, the safety device valve A protects the chemical tank or the like to which the multi-way valve B is attached by the above-described action.

In addition, each valve body 36.55 of the suction valve 35 and the blow-off valve 54 is placed against a valve seat 37.56 provided perpendicularly to the fluid suction passage 32 and the fluid blow-off passage 33 extending in the horizontal direction. Since the valve body 36.55 is designed to operate in the horizontal direction, fluid such as chemical liquid adhering to each valve body 36.55 and valve seat 37.56 drips downward, and the adhering fluid causes the valve body 36.55 to operate horizontally.
55 from adhering to the valve seat 37, 56 more than before.

Furthermore, during inspection, the cover 19, suction pipe 45, and blowout pipe 6
Valve stems 11.39.5 projecting outwardly from their respective apertures by simply removing each camp 26.52.72 without removing the valve stems 11.39.5.
You can easily check the adhesion between the valve seat and the valve body by simply lifting the valve 58 upwards. The condition can be canceled.

In the above embodiment, a spring is used as the actuation means according to the present invention, and each valve body is actuated by the elastic force of the spring and a change in internal pressure to open and close each opening. The means is not limited to this embodiment. For example, a pressure sensor is installed inside the valve body or on the passage side, and the pressure value detected by this sensor is compared with a predetermined value by a control device, and when the pressure value is greater than or equal to the predetermined value, Alternatively, the design may be such that, when the value is below a predetermined value, a mechanical mechanism is operated to operate each valve element and open and close the opening of each valve seat.

(Effects of the Invention) As is clear from the above explanation, in the safety device valve according to the present invention, when the internal pressure inside the safety device valve body rises to a predetermined value or more, the large valve body is The valve is pushed upwards, opening the valve seat hole and preventing explosions in chemical tanks or pipelines equipped with this safety device valve.

In addition, when the internal pressure inside the safety device valve body reaches a negative pressure below a predetermined value, the small valve body descends downward via the actuating means to open the opening in the large valve body, thereby increasing ventilation. Outside air is sucked through a certain cover to return the internal pressure to normal, and the small valve body is raised again via the actuating means to close the opening in the large valve body. Therefore, this safety device valve operates even when the negative pressure is below a specified level, returning the internal pressure to a normal value, and preventing negative effects on chemical tanks, pipelines, etc. caused by negative pressure below the specified level. be able to.

In addition, in the multi-way valve equipped with the above safety device valve, the function and effect of the safety device valve are as described above, but in the multi-way valve of the present invention, the fluid suction which communicates with the upper and lower passages is The passage and the fluid blowout passage are horizontally extended, and the valve bodies of the suction valve and the discharge valve act horizontally on these passages to open and close the openings of each valve seat. Compared to the case where the valve is arranged to operate in the vertical direction, even if chemical liquid etc. adheres to the abutment area between the valve seat and valve body, it will easily hang downward, and the chemical liquid adhering to the abutment area will be removed. It is possible to eliminate the fear that the valve seat and the valve body will be strongly adhered to each other due to the above-mentioned methods, and the valve body will malfunction.

As described above, the present invention exhibits extremely excellent practical effects.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a multi-way valve according to an embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of a safety device valve material multi-way valve according to an embodiment of the present invention. 1...Safety valve device main body, 2...Top opening, 3...
Valve seat, 7... Large valve body, 8... Through hole,
9... Hole, 10... Small valve body, 11.
... Valve stem, 12... Through hole, 19... Cover 20... Internal space, 21... Tip of valve stem, 22...
...hole, 29...valve body, 30.31...
Upper and lower passages, 32...Fluid suction passage, 33...Fluid blowout passage, 34...Top opening, 35.
・・Suction valve, 36 ・・Suction valve body, 37 ・ 39 ・ 55 ・ 57 ・ A ・ ・ B ・ ・ ・ ・・Valve seat, 38 ・・Fluid suction hole 1, ・・Valve stem,
54...Blowout valve,...Blowout valve body, 56...Valve seat,...Fluid blowout opening, 58...Valve stem, -Safety device valve, -Safety device valve material multi-way valve.

Claims (1)

[Scope of Claims] 1. A large valve body with an opening formed in the center is supported and mounted on a valve seat provided at the upper opening of the safety device valve body so as to be movable up and down, and a valve stem is mounted in the center. A small valve body having a hole in the large valve body is provided on the safety device valve main body side of the opening in the large valve body so as to be movable up and down by an actuating means, and the opening in the large valve body can be opened and closed. The upper part of the main body has an internal space that covers the upper opening of the valve body and can accommodate the valve stems of the large valve element and the small valve element in a freely operable manner, and has a hole formed in the upper part from which the tip of the valve stem projects. 1. A safety device valve characterized in that a breathable cover is attached thereto, and a cap is detachably attached to the hole for sealing the hole through which the valve stem is inserted. 2. Forming a valve body having upper and lower passages that communicate in the vertical direction, and a fluid suction passage and a fluid blowout passage that communicate with the upper and lower passages and extend in the horizontal direction; A large valve body with a hole formed in the center is supported and placed on a valve seat provided in the opening so as to be movable up and down, and a small valve body having a valve stem in the center is placed on the large valve body. An opening safety device is provided on the valve body side so that it can be moved up and down by an actuating means to open and close the opening of the large valve body.
A ventilated cover is attached to cover the opening and has an internal space that can freely accommodate the valve stems of the large valve body and the small valve body, and has a hole formed in the upper part from which the tip of the valve stem projects. , and a cap for sealing the hole through which the valve stem is inserted is removably provided in the hole, and further, a suction valve body is horizontally operated by an actuating means on a valve seat provided in the fluid suction passage. A suction valve is provided so that the opening of the valve seat can be opened and closed, and an elbow-shaped suction pipe is connected to the fluid suction passage through the valve seat, and the tip of the valve stem of the suction valve body is connected to the suction pipe. A cap is removably provided on the suction pipe and has an aperture that can protrude to the outside, and the tip of the valve stem that protrudes from the aperture can move horizontally to close the aperture, and a cap is provided in the fluid blowout passage. A blow-off valve in which a blow-off valve body is mounted on an internal valve seat and is operated horizontally by an actuating means,
An opening in the valve seat is provided so that it can be opened and closed, and an elbow-shaped blowout pipe is connected to the fluid blowout passage through the valve seat, and the tip of the valve stem of the blowout valve body can protrude to the outside of the blowout pipe. A multi-way valve with a safety device valve, characterized by a configuration in which a cap is detachably attached to the blow-off pipe, forming an opening, and allowing the tip of the valve stem protruding from the opening to move horizontally and sealing the opening. .