JPH0453496Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention uses spring force to maintain the set pressure in the fluid piping, and also uses adjustment bolts (including cap type).
This relates to a pressure regulating valve that has a large diameter, a high set pressure, and a high spring force, and is configured to adjust the pressure by changing the length of the spring by turning the valve.

[Conventional technology]

Conventionally, various pressure regulating valves of this type using springs are known, needless to say. Among these, it is particularly difficult to turn the adjusting bolt manually for those with large diameters, high set pressures, and large spring forces.

[The problem that the idea attempts to solve]

The object of the present invention is to provide a new pressure regulating valve that solves the above-mentioned difficulties by adding an regulating mechanism that utilizes air pressure.

[Means to solve the problem]

In order to achieve the above object, the pressure regulating valve of the present invention includes a valve housing 6 formed of an inlet 1, an outlet 2, a valve seat 3, a lid 4, and a clamp 5 for attaching and detaching the lid 4, and a The valve has a yoke 7 fixed to the yoke 7 and a cylinder 8 fixed to the yoke 7, and a valve stem 9 is vertically inserted into the valve housing 6 and a first piston rod 10 is vertically inserted into the cylinder 8 so as to be vertically movable. The upper end of the rod 9 and the lower end of the first piston rod 10 are connected by a joint 11 in the yoke 7, and a valve stopper 12, which is seated on the valve seat 3 at the lower end of the valve rod 9, is attached to a position inside the cylinder of the first piston rod 10. 1 piston 13
A pipe-shaped second piston rod 14 is fitted into the first piston rod 10 above the first piston 13 so as to be movable up and down.
and the second piston 15 and the first piston 13
A spring 16 is inserted between the upper air joint 18 and the upper and lower walls of the cylinder 8.
and lower air joint 19, and connect the second
A pipe-shaped adjustment bolt 22 having a male screw 20 carved on the outer periphery and a knurled knob 21 at the outer end is fitted on the outside of the piston rod 14 so as to be vertically slidable and rotatable.
A screw tube 24 having a female thread 23 carved on the inner peripheral surface is provided at the incisal edge of the exit hole of the second piston rod 10, 14 and the adjustment bolt 22.
3 and the male screw 20 are screwed together.

[Effect]

Since the present invention is as described above, when adjusting the set pressure, first check the upper air joint 18.
The second piston 15 is slightly pushed down by supplying air at a predetermined pressure from the pump, and in this pressed state (see Fig. 2), loosen the lock nut 25 with a spanner, then turn the adjustment bolt 22 to set the pressure. After that, the air supplied through the upper air joint 18 is removed, the second piston 15 is returned to the set position, the lock nut 25 is tightened, and the adjustment bolt 2 is tightened.
In addition, when cleaning by circulation cleaning, it is sufficient to supply air at a predetermined pressure from the lower air joint 19 to push up the valve stopper 12. Furthermore, when cleaning by disassembling and cleaning, air at a predetermined pressure is supplied from the lower air joint 19 to push up the valve plug, and then the removable clamp 5 and the clip-type joint 11 are removed and disassembled. All you have to do is clean it and then reassemble it.

[Effect of idea]

Since the present invention has the above-mentioned configuration, it is of course highly effective in completely achieving the intended purpose of providing a new pressure regulating valve that eliminates the above-mentioned difficulties. As mentioned in the above-mentioned operation, when cleaning by circulation cleaning or disassembly cleaning, the load on the adjustment bolt is eliminated by operating the adjustment mechanism using air pressure, or the valve stopper 12 is unseated. It is convenient because it can be easily carried out in this state.

〔Example〕

The embodiment shown in the figure includes a valve housing 6 formed by an inlet 1, an outlet 2, a valve seat 3, a lid 4, and a clamp 5 for attaching and detaching the lid 4, and a yoke 7 fixed on the lid 4.
and a cylinder 8 fixed on the yoke 7. A valve stem 9 is inserted into the valve housing 6 and a first piston rod 10 is vertically inserted into the cylinder 8 so as to be vertically movable. 1 Place the lower end of the piston rod 10 inside the yoke 7 and attach it to the clip-type joint 11.
A valve plug 12 is connected to the lower end of the valve stem 9 and is seated on the valve seat 3, and a first piston 13 is fixed to the inside of the cylinder of the first piston rod 10. A pipe-shaped second piston rod 14 is fitted in the upper part so as to be movable up and down.
A second piston 15 is integrally provided at the lower end of the piston rod 14, and the second piston 15 and the first piston
A spring 16 is inserted between the piston 13 and the upper wall of the cylinder 8 and the lower air joint 19, and the second piston rod 1
A pipe-shaped adjustment bolt 22 with a locking nut 25 having a male thread 20 carved on the outer periphery and integrally having a knurled knob 21 at the outer end is fitted on the outside of the cylinder 8 so as to be able to slide vertically and freely rotate. at the first and second piston rods 1
A screw tube 24 having a female thread 23 carved on the inner peripheral surface is integrally provided on the incisal edge of the exit hole of the adjustment bolt 22 and the adjustment bolt 22, and the female thread 23 and the male thread 20 are screwed together. In addition, a wrench type lock nut 25 is screwed onto the outer end of the adjustment bolt 22, and the first
An identification plug 26 is attached to the outer end of the piston rod 10.

In the figure, 28 indicates a seal, and 29 indicates an O-ring.

[Brief explanation of drawings]

FIG. 1 is an overall sectional view showing an embodiment of the pressure regulating valve of the present invention, and FIG. 2 is a partial sectional view showing a state in which air is introduced from the upper air joint. 1...Inlet, 2...Outlet, 3...Valve seat, 4...
Lid body, 5... Clamp for attachment/detachment, 6... Valve housing, 7...
...Yoke, 8...Cylinder, 9...Valve stem, 10...
...First piston rod, 11...Joint, 1
2... Valve stopper, 13... First piston, 14... Second piston rod, 15... Second piston, 16
... Spring, 18 ... Upper air joint, 19 ... Lower air joint, 20 ... Male thread, 21 ... Knob, 22 ... Adjustment bolt, 23
... Female thread, 24 ... Spiral tube, 25 ... Lock nut, 26 ... Identification plug, 28 ... Seal, 29
...O-ring.

Claims (1)

[Scope of utility model registration request] A valve housing 6 formed by an inlet 1, an outlet 2, a valve seat 3, a lid 4, and a clamp 5 for attaching and detaching the lid 4, a yoke 7 fixed on the lid 4, and a valve housing 6 fixed on the yoke 7. A valve rod 9 is vertically inserted into the valve housing 6 and a first piston rod 10 is vertically inserted into the cylinder 8 so as to be vertically movable, and the upper end of the valve rod 9 and the lower end of the first piston rod 10 are connected to the yoke 7. A valve stopper 12 is connected to the inside of the cylinder by a joint 11 and is seated on the valve seat 3 at the lower end of the valve rod 9.
A pipe-shaped second piston rod 14 is fitted into the first piston rod 10 above the first piston 13 so as to be movable up and down, and a second piston 15 is fitted below the second piston rod 14.
and the second piston 15 and the first piston 13
A spring 16 is inserted between the upper air joint 18 and the upper and lower walls of the cylinder 8.
and lower air joint 19, and connect the second
A pipe-shaped adjustment bolt 22 having a male screw 20 carved on the outer periphery and a knurled knob 21 at the outer end is fitted on the outside of the piston rod 14 so as to be vertically slidable and rotatable.
A screw tube 24 having a female thread 23 carved on the inner peripheral surface is provided at the incisal edge of the exit hole of the second piston rod 10, 14 and the adjustment bolt 22.
3 and the male screw 20 are screwed together.