JP4649025B2 - Opener of gas fire extinguishing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an opener of a gas fire extinguishing facility for an inert gas such as carbon dioxide, nitrogen, halon, or inert gas, and more specifically, opens a gas storage container or a starting gas container of a gas fire extinguishing facility. It relates to an opener.
[0002]
[Prior art]
A container valve such as a gas storage container of a gas fire extinguishing equipment is opened by pushing an opening knob of an opener (for example, Japanese Utility Model Laid-Open No. 7-3667). FIG. 5 shows the opener B, and FIG. 6 shows the container valve A. As shown in FIG. 6, the container valve A has a valve body 21 attached to the gas storage container 20, a first flow path 22 communicating with the inside of the gas storage container 20, and orthogonal to the first flow path 22. The second flow path 23 is provided. A valve seat 24 is provided at the intersection of the second flow path 23 with the first flow path 22, and a valve body 25 is incorporated in the valve seat 24 so as to be able to contact and separate.
[0003]
One end opening of the second flow path 23 of the valve body 21 is closed by a sealing plate 26 made of a copper plate or the like, and the sealing plate 26 is screwed into one end opening of the second flow path 23 of the valve body 21. And is fixed through the seal packing 28. The exhaust pressure nut 27 has a screw hole 29 in the center thereof, and the opener B is attached to the screw hole 29. The other end opening 30 of the second flow path 23 is connected to a hose (not shown) having a extinguishing gas radiation nozzle at the tip.
[0004]
A gas such as carbon dioxide is sealed in the sealed space 31 between the back surface of the valve body 25 and the sealing plate 26 in the second flow path 23, and the valve body is interposed between the back surface of the valve body 25 and the sealing plate 26. A spring 32 that presses 25 against the valve seat 24 is interposed. On the other hand, an annular path 33 communicating with the first flow path 22 is formed between the outer periphery of the valve seat 24 of the valve body 21 and the taper surface 25 a on the tip end side of the valve body 25. The pressure of the gas in the first flow path 22 that flows in is applied to the distal end side of the valve body 25. The pressure value obtained by adding the pressing biasing force of the spring 32 to the sealed gas pressure applied to the back side of the valve body 25 is set to be equal to or higher than the gas pressure value in the first flow path 22 in communication with the gas storage container 20. is there. Accordingly, the valve body 25 is kept in close contact with the valve seat 24 by applying the sealed gas pressure and the pressing biasing force of the spring 32 to the back side thereof, and the first flow path 22 and the second flow path 23 are maintained. The communication state with the other end opening 30 is blocked.
[0005]
On the other hand, as shown in FIG. 5, the opener B is a hollow needle that incorporates a piston 34 and a spring 35 inside the cylinder of the opener body 1, and breaks through the sealing plate 26 of the container valve A on the tip side of the piston 34. A broken shaft 36 is integrally connected. A connection fitting 39 having a through hole 37 at the center and a small gas escape hole 38 at the outer periphery is attached to the front end side of the cylinder of the opener body 1 with a cap nut 40. The tip end side of the breaking shaft 36 is inserted into the through hole 37 of the connection fitting 39. The opener body 1 is provided with an opening knob 2 for reciprocatingly moving the piston 34 against the force of the spring 35. By pressing the release knob 2, the piston 34 moves forward in the cylinder of the opener body 1 against the force of the spring 35, and by this advancement, the tip of the breaking shaft 36 extends from the through hole 37 of the connection fitting 39. It protrudes outward.
[0006]
As shown in FIG. 6, the opener B is attached to the container valve A by screwing and connecting the connection fitting 39 into the screw hole 29 of the exhaust pressure nut 27 of the container valve A. Thus, when the opening knob 2 of the opener B is pushed in when a fire occurs, the sealing plate 26 of the container valve A is pierced at the tip of the breaking shaft 36. Due to the destruction of the sealing plate 26, the sealed gas on the back surface side of the valve body 24 is discharged from the gas escape hole 41 provided on the outer periphery of the exhaust pressure nut 27 and the gas escape hole 38 on the opener B side. The gas pressure of the gas drops and is lost. Therefore, the valve body 24 is retracted against the force of the spring 32 due to the gas pressure in the first flow path 22, and the first flow path 22 and the other end opening 30 of the second flow path 23 are in communication with each other. A gas in the gas storage container 20 passes through the other end opening 30 of the first flow path 22 and the second flow path 23 to a hose (not shown) with a fire extinguishing gas injection nozzle connected to the other end opening 30. Will be introduced.
[0007]
[Problems to be solved by the invention]
In the opener B in which the opening knob 2 is pushed by hand, since it is necessary to break through the sealing plate 26 made of a copper plate or the like of the container valve A, a considerable pushing force is required. Usually, the opening knob 2 is moved to the palm of the hand. I hit it hard. However, such an opening operation using an opener is expected to be performed by a person who discovers a weak fire or a person who is upset in a fire occurrence state. In this case, the pushing of the opening knob 2 of the opener B tends to be insufficient, so that the sealing plate 26 of the container valve A is not sufficiently pierced and there is a possibility that predetermined gas emission cannot be performed.
[0008]
The present invention has been made to solve such a problem, and can reliably push the opening knob of the opener with a small operating force, and can be reliably opened even by a weak fire discoverer or the like. It aims at providing the opener of gas fire extinguishing equipment.
[0009]
[Means for Solving the Problems]
The opener of the gas fire extinguishing equipment according to the present invention is an opener body (1) provided with an opening knob (2) for pushing and opening a container valve of the gas fire extinguishing equipment so as to be reciprocally movable. An eccentric cam (3) that abuts and presses the release knob is attached to be rotatable about the rotation shaft (9), and a handle (10) is attached to the eccentric cam, and the handle (10 ) Is provided in an upward posture, and the eccentric cam (3) is provided at a distance (L) from the opening knob (2), and by rotating the handle (10) downward, The opening knob (2) is in contact with the opening knob (2) and is set to push in the opening knob (2) . In this case, on the outer surface of the open body (1), fitted with a separate support member (4) is an open body (1), the rotation axis eccentric cam (3) to the support member (4) (9) It can also be rotatably mounted around.
[0010]
According to the opener configured as described above, if the eccentric cam is rotated around the rotation shaft by holding the handle, a strong pressing force can be applied to the opening knob by the eccentric cam, and the opening knob can be reliably secured with a small operating force. And can be pushed in easily.
[0011]
By attaching the eccentric cam to the opener body with a support member attached to the outer surface of the opener body, the eccentric cam can be easily attached to the existing opener.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of the opener, FIG. 2 is a side view of the opener, FIG. 3 is a rear view of the opener, and FIG. 4 is a longitudinal side view of the opener.
[0013]
1 to 4, the opener main body 1 itself of the opener B and the internal structure of the opener main body 1 are exactly the same as the conventional one shown in FIG. The explanation is omitted. An eccentric cam 3 for pushing the opening knob 2 is attached to the opener body 1 by a support member 4 separate from the opener body 1. The support member 4 is opened after the cap nut 40 is removed and the attachment ring 6 inserted from the tip of the cylinder of the opener main body 1 until it contacts the stepped portion 1a (see FIG. 4) on the outer periphery of the opener main body 1. A U-shaped bearing member 7 that is fitted on the outer surface of the opening body 1 so as to surround the outer periphery of the opening knob 2 and to face the mounting ring 6, and the mounting ring 6 and the bearing member 7 are connected to the opening body 1. It comprises a plurality of connecting screws 8 which are connected on the outer surface. The U-shaped bearing member 7 has opposing wall portions 7a and 7a and a base portion 7b connecting the base ends of the opposing wall portions 7a and 7a, and a cylinder rear end portion of the opener main body 1 is provided on the base portion 7b. A fitting portion 16 is provided on the outer periphery to fit in a non-rotating manner. In addition, after inserting the attachment ring 6 in the outer periphery of the opener main body 1, the cap nut 40 is screwed and fixed to the cylinder front-end | tip part of the opener main body 1 as it was.
[0014]
The eccentric cam 3 is composed of a short cylindrical body or disk having a rotation shaft 9 at an eccentric position, and is pivotally attached to the bearing member 7 with the rotation shaft 9. A handle 10 is attached to the eccentric cam 3. The handle 10 includes a lever 11 having a base end portion inserted and fixed to a part of the outer periphery of the eccentric cam 3 and extending radially outward, and a grip ball 12 attached to the tip of the lever 11 .
[0015]
The eccentric cam 3 is located in front of the projecting tip of the opening knob 2 in a state where the eccentric cam 3 is attached to the opener body 1 by the support member 4. 2 and FIG. 4, when the handle 10 is at an angle of an approximately vertical posture pointing upward, a part of the outer peripheral surface closest to the rotating shaft 9 of the eccentric cam 3 is at a certain distance from the tip of the opening knob 2. As the handle 10 is rotated in the downward direction X, the outer peripheral surface of the eccentric cam 3 gradually comes into contact with the distal end of the opening knob 2 and further rotates downward so that the eccentric cam 3 is rotated downward. Gradually pushes the release knob 2, and when the handle 10 is rotated approximately 180 ° until it reaches the downward angular position as shown by a two-dot chain line in FIGS. 2 and 4, the release knob 2 is surely pushed. Is set. When the opening knob 2 is pushed in completely, the sealing plate 26 of the container valve A is reliably pierced as described above, and the opened state of the container valve A is obtained.
[0016]
When the handle 10 is in a substantially vertical upward posture as shown by a solid line in FIG. 4, the safety pin 13 is connected to the rotary shaft 9 and the rotary shaft 9 as shown in FIG. Are inserted into the hole 14 of the bearing member 7 and the hole 15 of the eccentric cam 3 respectively provided at different positions. The safety pin 13 is extracted when an opener is used in the event of a fire.
[0017]
In the opener configured as described above, if the safety pin 13 is pulled out and the eccentric cam 3 is rotated approximately 180 ° around the rotation shaft 9 by holding the handle 10 in the event of a fire, the eccentric cam 3 exerts a strong pressing force on the opening knob 2. The opening knob 2 can be pushed in reliably and easily. By pushing the opening knob 2, the sealing plate 26 of the container valve A shown in FIG. 6 is surely pierced and the container valve A can be completely opened. That is, the opening knob 2 can be reliably pushed with a small force by the boost of the eccentric cam 3 and the handle 10, and the container valve A can be completely opened.
[0018]
The eccentric cam 3 can be easily attached to an existing opener by attaching the eccentric cam 3 to the opener main body 1 with a support member 4 separate from the opener main body 1, but is not necessarily limited thereto. is not. For example, an opener body 1 in which a bearing portion is integrally formed around the opening knob 2 can be newly provided, and the eccentric cam 3 can be rotatably mounted around the rotary shaft 9 on the bearing portion. In this case, the mounting ring 6 and the connecting screw 8 are unnecessary. The opener of the present invention is not limited to the container valve A used for a gas storage container, but can be similarly applied to a container valve attached to a starting gas container or the like.
[0019]
【The invention's effect】
According to the present invention, it is possible to reliably push the opening knob with a small force by a boost by the eccentric cam and the handle, and thus it is possible to reliably open the container valve even by a weak fire discoverer. There is.
[Brief description of the drawings]
FIG. 1 is a plan view of an opener.
FIG. 2 is a side view of an opener.
FIG. 3 is a rear view of the opener.
FIG. 4 is a longitudinal side view of an opener.
FIG. 5 is a cross-sectional view of a conventional opener.
FIG. 6 is a cross-sectional view of a container valve.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Opener body 2 Knob for opening 3 Eccentric cam 4 Support member 9 Rotating shaft 10 Handle
L distance

Claims (2)

An eccentric cam that pushes the release knob in contact with the release knob is provided on an opener body that is provided with an openable knob that pushes and opens the container valve of the gas fire extinguishing equipment. And a handle is attached to the eccentric cam .
The handle is provided in an upward posture,
The eccentric cam is provided at a distance from the opening knob, and is set to abut against the opening knob and push in the opening knob by rotating the handle downward. An opener for gas fire extinguishing equipment.   The gas fire extinguishing system according to claim 1, wherein a support member separate from the opener body is attached to an outer surface of the opener body, and the eccentric cam is rotatably attached to the support member around a rotation axis. Equipment opener.

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