JPS58207586A - Self-actuated pilot operating-type safety valve - Google Patents

Abstract

PURPOSE:To prevent malfunction due to effects from the salty outside air or sea water from occurring by burying said safety valve in an air-type fender for absorbing shocks when a ship comes alongside the pier. CONSTITUTION:A pilot operating-type safety valve 6 is fitted in the top mouthpiece 2 of a fender main body, and if a shock is applied when a ship comes alongside the pier and the pressure in the fender is increased to a preset pressure or higher, a pilot valve body 20 is moved upward, and the pressure in a lower cylinder chamber 13d is discharged outside through a communicating hole 16b, the center hole 20a of the prostate type valve body 20, a center hole 24a, and the communicating hole 28a of a cap. Then, a main valve body 13 is moved downward, thus opening a main valve, and the air in the fender is discharged outside the fender through a long hole 7c and a center hole 7a. Since the safety valve 6 is buried and fitted in the fender, malfunction due to effects from sea water, etc. is prevented from occurring.

Description

[Detailed Description of the Invention] The invention is a pneumatic fender installed in a pneumatic fender to absorb shock when a ship is berthed, and if the pressure inside the fender increases and exceeds the set pressure. The valve opens automatically to release the air inside the fender to the outside, and when the pressure inside the fender drops and returns to the set pressure, the valve closes automatically to release the air inside the fender. It concerns a self-cutting pilot-type safety valve with a metal-biased function that stops the release.

This type of conventional self-cutting pilot type safety valve does not malfunction or become inoperable due to the influence of salty outside air or seawater due to its usage environment. It is desired that the right arm be easily attached to the fender and not easily susceptible to damage from outside t<b.

In view of the above-mentioned request, the object of the invention is to provide a disc-shaped JJj having the entire center of the valve body (1) and the outer edge thereof being bolted to the inner edge surface of the mouthpiece of the pneumatic fender. /, By fixing to the lower surface of the inner edge of the attachment plate, the entire valve is almost buried in the cap, and it can be easily attached to and removed from the cap, and the main valve body can be slidably inserted into the valve box. In addition, the entire leading valve body must be slidably inserted into the main valve body.It is a self-cutting type that prevents the sliding parts of the main valve and )ξ pilot valve from constantly coming into contact with the outside air outside the fender. This is intended to provide a pilot-type safety valve, and this will be explained based on one embodiment illustrated below. 1 is a hollow fender with flexibility M and into which pressurized air is injected. , 2 is an annular cap whose outer edge is fixed to the top opening of the fender main body 1; 3 has a center hole 3a, and whose outer edge is attached to the upper surface of the inner edge of the cap 2 via a gasket 4 with a bolt 5. It is a fixed disc-shaped mounting plate. 6 is a self-blade type pyronode operating Saint Zen valve according to the present invention, and 7
The upper end surface is connected to the lower inner edge of the mounting plate through the gasket 8 by bolts 9 to the lower surface of the inner edge of the mounting plate. A large-diameter cylinder chamber 7b that opens downward, a plurality of long holes 7c and small holes 7d that communicate the cylinder chamber 7b with one circle of fender, and an annular protrusion formed on the ceiling surface of the cylinder chamber 7b. a substantially cylindrical valve box 10 having a valve 1 seat 7e;
A bolt 12 is attached to the lower end surface of the valve body 7 through a gasket 11.
A disk-shaped bottom cover 1 having a small-diameter center hole 10ak fixed to the cylinder chamber 7b and communicating with the inside of the fender 1;
3 is slidably inserted into the cylinder chamber 7b, and is formed at a position corresponding to the valve seat 7e on the top surface, and synthetic rubber is baked on the surface that can come into contact with the valve seat 7e. and an annular protrusion 13a whose outer □ The cylindrical chamber 13b, the communication passage 13c that communicates the cylindrical chamber 13b and the small hole 7d, and the Shimoda cylindrical chamber 13cM formed on the bottom: the lower cylindrical chamber 13d.
The central part 4' (the formed annular protrusion 1:3e and the annular protrusion 13 (the central hole 1:3' and the screw having a purple color) connecting the inner and outer cylindrical chambers 1:3b and '] The main valve body 14 is embedded in the outer peripheral surface of the main valve body 1:3 and maintains airtightness between the wall surface of the cylinder chamber 7b and the +if Doi body 13, and 15 is the O ring that is embedded in the outer peripheral surface of the main valve body 1:3. 10 is a main valve spring which is placed on the left between the main valve body 13 and the main valve body 13 and gives the main valve body 13 a tendency to move in the L direction, and these constitute the main valve.16 is an annular projection. An annular protrusion 16a formed on the apex ITfl-H which is screwed into the inside of the ridge 13c, and a plurality of communication holes 16b that communicate between the outside 1ltll 2 of the bolts 7 and 16a and the Shimoda cylinder chamber 13d. 17 is the upper cylinder chamber 1.
A substantially cylindrical cover 19 is fixed to the main valve body 13 with a screw 18 so as to cover the main valve body 13, and the cover 19 is held between the cup 17 and the main valve body 13, and is connected to the inside of the cover 17 and the upper cylinder chamber. 13
20 is the upper partial force -
After the diaphragm receiver 21 is inserted into the center of the diaphragm 19 and inserted into the upper part of the large diaphragm 19, the naso +- 22 is screwed on and tightened to come into contact with the diaphragm 19.
23 is the center hole 13, which has a central hole 20a and f, in which synthetic rubber is baked in the position of
The O-ring 24, which is embedded in the inner circumferential surface of the valve f and maintains air ffi' between the inner circumferential surface and the pilot valve body 20, is screwed into the top wall of the cover 17 so that it can move forward and backward. 25 is an adjustment screw 24 having a center hole 24a passing through it vertically.
A spring receiver 26 is fixed to the lower end of the spring receiver and has a center hole 25a that communicates between the center hole 24a and the inside of the cover 17. 27 is a locking nut screwed onto the adjustment screw 24, and 28 is screwed onto the top of the cover 17, and the top wall has a communication hole 28a with the outside air. The caps are provided and these constitute the pilot valve.

Since the self-cutting type safety valve according to the present invention is constructed as described above, the pressure inside the fender 1 is reduced by the small hole 7 (1,
Continuous Jln path 1 :3 c f to L circle fZi ′ to 1
3B, an upward displacement force Lj is applied to the diaphragm 19, but the pressure reaches the set pressure and is not cooled. Since the pilot valve body 20 is strong, the annular protrusion 16 of the pilot valve seat 16
J VCC is on the floor, that is, the pilot valve is closed. Father, at this time the pressure inside fender 1 is elongated hole 7c,! : Outside the annular protrusion 13a if! The same pressure is introduced into the lower cylinder chamber 13d from the center hole 10a of the bottom cover 10 and is applied to the main valve body 13 upwardly. Since the pressure receiving area of the bottom surface of the main valve body 13 is larger than the pressure receiving area of the top (m) of the main valve body 13, the annular protrusion 13a is attached to the valve seat 7eK.
The pressure is continued, that is, the main valve is closed.

Next, when the pressure inside the fender 1 rises due to the impact when a ship approaches the berth and exceeds the set pressure VC, the diaphragm 19
Since the upward displacement force applied to the 0 position is stronger than the downward elastic force exerted by the adjustment spring 26.

The pilot valve element 20 is moved upward and separated from the annular protrusion 16a of the pilot valve holder 16, that is, the Nonoirot valve moves lrl.
<. Therefore, the pressure inside the Shimoda cylinder chamber 13d is the same as that of the communication hole 16b.
Between the pilot valve body 20 and the annular protrusion 16a, the middle Ib hole 2Qa
+ Inside the cover 17, center hole 25a.

Inside 7L: It is released to the outside through the hole 24a, the inside of the cap 28, and the communication hole 28a. Then, these pressure leaving 1
Since the hole 1111 is sufficiently larger than the center hole 10a on the pressure introduction side, the pressure inside the Shimoda cylinder chamber 13d decreases, and as a result, the main valve body 13 is moved downward rather than the force that moves the main valve body 13 upward. Since the force in this direction increases, the main valve element 13 is moved downward, and the annular protrusion 13;1 separates from the valve seat 7e, that is, the main valve opens.

bt, air in the fender 1179 is released to the outside of the fender 1 through the elongated hole 7c, between the annular protrusion 1321 and the valve seat 7e, and through the center hole 7ai.

Next, when the pressure within the fender 1 decreases due to the release and returns to the set pressure trench, the upward displacement force applied to the diaphragm 19 becomes weaker than the downward elasticity of the adjustment spring 26. The pilot valve body 20 descends and seats again on the annular protrusion 16a of the pilot valve seat 16, i.e., the pylon] - The valve closes. Then, the pressure in the Shimoda cylinder chamber 13 (I rises to the pressure in the town fender A 31, so the main valve body 13 is moved to the L side by the above-mentioned original Jψ, and the annular protrusion 13
．． j is seated again on the valve seat 7e4C.

The operation of the unsafe valve is repeated as described above, but in this safety valve, the outer edge of the valve body 7 is connected to the base 2 of the fender 1 as described above.
By fixing it to the lower surface of the inner edge of the mounting plate 3 that can be fixed to the mounting plate 3, the entire valve is almost buried in the metal 2, and the main valve body 13 is slidably inserted into the valve body 7. By fitting the pilot valve body 20 slidably into the entire main valve body 13, the sliding parts of the main valve and the front valve are always connected to the fender 1.
Since it prevents contact with the outside air, the sliding parts will not rust, deteriorate, or stick due to the influence of salty outside air or seawater, and therefore will not malfunction or become inoperable. It is difficult to fall into. My father, the entire valve is inside the mouthpiece 2 Ks! Since it is sunken, it is less susceptible to damage from outside.

Further, since it is fixed to the base 2 with a bolt through the entire mounting plate 3, which is a simple disk, attachment and detachment are extremely easy.

Since the structure of the mounting plate 3 is extremely simple, the structure of the mounting jig is also simple, and as a result, the mounting jig is extremely inexpensive.

The above-mentioned zero-port, uninvented self-cutting pilot-operated safety valve does not malfunction or become inoperable due to the influence of salty outside air or seawater, and is less susceptible to external damage. It has the practically important advantages of being easy to attach and detach from the fender, and the mounting jig is extremely inexpensive.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a main part including a simple embodiment of a self-cutting pilot-operated safety valve according to the invention, and FIG. 2 is a longitudinal cross-sectional view of the above-mentioned embodiment. ■... fender, 2... cap, 3... mounting plate, 4...
...Gasket, 5...Bolt, 6...Self-blade pilot operated safety valve, 7...Valve box, 8...Gasket, 9...Bolt, 10...JM, lid, 11...・Gasket, 12... Bolt, 13... Main valve body, 14
...0 ring, 15...main valve spring, 16...prior valve seat, 17...cover, 18...screw, 19...
Diaphragm, 20...Tip\r valve body, 21...Diaphragm receiver, 22...Nut, 2;3...01 non-gang, 24...Adjustment screw, 25...No2 screw receiver, 26
... Adjustment spring, 27 ... Looseness correcting nut, 28 ...
·camp. Agent Yasushi Shinohara ′; 1, 1 King - 1 Misfortune

Claims (1)

[Claims] The valve box is fixed to the lower inner edge of a disc-shaped mounting plate that has a center hole and whose outer edge is bolted to the upper inner edge of the mouthpiece of the pneumatic fender, and the main valve body is inserted into the valve box. A self-cutting pilot-operated safety valve comprising a main valve body and a pilot valve body which is slidably inserted into the main valve body.