JPH0336774Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement in a two-way valve that performs fluid outflow and sealing by energizing and de-energizing an electromagnetic coil.

[Conventional technology]

This type of two-way valve, which has been used conventionally, is
To explain Figures 6 to 6, a main valve seat 1A that partitions an inflow pipe A and an outflow pipe B is provided at one end of the valve box 1, and in the case of the figure, the main valve seat 1A faces the outflow pipe B. There is. A solenoid pipe 2 surrounded by an electromagnetic coil 3 is coaxially connected to the other end of the valve box 1, and the end of the solenoid pipe 2 is closed by a fixed iron core 4.

In the cylindrical space thus formed, there is a main valve seat 1A.
A main valve body 5 that seals the main valve body 5 and a movable iron core 6 operated by the electromagnetic coil 3 are slidably provided.

The main valve body 5 is provided with a fluid path 5A communicating with the outflow pipe B on its axis, and a sub-valve seat 7 on the movable iron core side of the fluid path 5A is sealed by a sub-valve body to be described later. is formed. A return spring 8 is provided between the movable iron core 6 and the fixed iron core 4, and a sub-valve element 9 is provided on the main valve element side of the movable iron core 6.

Main valve body 5 and solenoid pipe 2 fitted to the main valve body
A washer-like retaining ring 10 (FIG. 5) is fixed between the main valve body 5 and the main valve body 5 to restrict the sliding range of the main valve body 5. Note that 11 is a pressure chamber constructed between the main valve body 5 and the movable iron core 6.

The operation of changing from the sealed state (FIG. 4) to the outflow state will be explained. When the electromagnetic coil 3 is energized to attract the movable iron core 6 to the fixed iron core 4, the sub-valve seat 7 is opened.
During valve sealing, high-pressure fluid from the inflow pipe A enters through the clearance 12 between the main valve body 5 and the valve box 1, so the pressure in the pressure chamber 11 is higher than the pressure in the outflow pipe B. . By opening the fluid path 5A, this pressure becomes the same low pressure as in the outflow pipe B.
However, since the outflow pipe side of the main valve body 5 receives high pressure from the inflow pipe A, the main valve body 5
moves toward the fixed iron core 4, the main valve seat 1A opens, and the fluid flows out.

At this time, the moving main valve body 5 is stopped at an appropriate position by the stop ring 10, and the sub-valve body 7 is sealed by the sub-valve body 9 of the movable iron core 6 which is attracted to the fixed iron core 4. It has become unstoppable.

[Problem that the invention attempts to solve]

When assembling the conventional two-way valve described above, first the main valve body 5 is assembled, then the stop ring 10, the solenoid pipe 2, and the movable iron core 6 are respectively assembled to the valve box 1, and finally the fixed iron core 4 is assembled.
However, in order to reduce oxides and remove toxic gases and slag, the connections between the inflow pipe, outflow pipe, and valve box, as well as the connections between the valve box, solenoid pipe, and stop pipe, must be brazed using flux. and clean it after work. The former parts group is a rabbit horn, and the latter parts group can be cleaned by cleaning the valve box 1 because the retaining ring 10 protrudes inward.
The interior cannot be completely treated, and flux and the like remain in the valve box 1, which impairs the movement of the sliding members, that is, the main valve body 1 and the movable iron core 6.

Furthermore, it is a machining process to provide a radial groove 13 (FIG. 6) on the top surface of the main valve body 5 in order to form a communication path with the inflow pipe A when the top surface of the main valve body 1 comes into contact with the stop ring 10. It has the disadvantage that it is not easy to use and is expensive.

The object of the present invention is to improve the stop ring of the two-way valve described above to eliminate the above-mentioned drawbacks.

[Means for solving problems]

According to the present invention, the above object is a valve box which has a main valve seat at one end that partitions an inflow pipe and an outflow pipe, and whose other end is closed by a solenoid pipe and a fixed iron core provided with an electromagnetic coil on the outer periphery. A main valve body that seals the main valve seat and a movable iron core operated by the electromagnetic coil are arranged in an internal cylindrical space so as to be slidable, and the main valve body has a main valve body that seals the main valve seat and a movable iron core that is operated by the electromagnetic coil. A fluid path communicating with the outflow pipe is provided, and a sub-valve seat is formed at the end of the fluid path on the side of the movable iron core, and a return spring is also provided on the side of the main valve body between the movable iron core and the fixed iron core. In a two-way valve equipped with a sub-valve body, an annular groove is formed in the internal sliding wall surface of the valve body, and pawls spaced apart in the circumferential direction are formed on the outer periphery made of an elastic material and formed in a dish shape. The present invention is solved by a two-way valve characterized in that a retaining ring is press-fitted into the annular groove and has a through hole in the center thereof through which the sub-valve body passes.

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. Parts common to those of a conventional two-way valve will be given the same reference numerals and explanations will be omitted.

In the present invention, as shown in FIG.
is not flat as in the past, but is made into a dish shape using an elastic material, and a plurality of claws 14 are formed at intervals in the circumferential direction on the tapered outer periphery, and a plurality of claws 14 are formed on the inner flat part. A through hole 15 is provided through which the sub-valve body 9 passes. In this case, the machining of the radial groove 13 on the upper surface of the main valve body 5 as in the conventional method is omitted.

When assembling the two-way valve, an annular groove 16 is left between the valve body 1 and the solenoid pipe 2, and the valve body 1 and the solenoid pipe 2 are connected with a brazing material, and the brazed part and the valve body 1 are
After cleaning the inside, the retaining ring 10 is pushed through the upper opening of the solenoid pipe 2 using its elasticity, and the outer edges of each claw portion 14 are elastically fitted into the annular grooves 16 to fix the retaining ring 10.

The operation from the sealed state to the outflow state is the same as in the case of FIG. 4.

To change the state from the outflow state to the sealed state, when the electromagnetic coil 3 is de-energized, the movable iron core 6 is moved in the direction of the main valve body 5 by the return spring 8, and the sub-valve seat 7 is moved by the sub-valve body 9. Seal. The fluid pressure in the inflow pipe A passes through the clearance 12 and further through the gap between the claws 14 of the stop ring 10 to increase the pressure in the pressure chamber 11, and this pressure and the pressing force of the return spring 8 cause the main valve body 5 to It contacts the valve seat 1A and is sealed.

[Effect of idea]

As mentioned above, the retaining ring, which has claws spaced circumferentially on the outer periphery formed in a dish shape, is press-fitted into the annular groove using its elasticity and fixed, so that it can be secured inside the brazed valve box. The interior of the valve box can be completely cleaned prior to inserting the locking ring, and the movement of the main valve body and movable iron core will not be hindered by leaked flux. Further, a fluid connection path can be easily formed by the gap between the pawls, and there is an advantage that the formation of a radial groove in the main valve body, which is time-consuming and expensive in the conventional method, can be omitted.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the two-way valve according to the present invention, of which FIG. 1 is an overall sectional view, FIGS. 2 and 3 are perspective views showing the retaining ring and the upper part of the main valve body, 4 to 6 show a conventional two-way valve, of which FIG. 4 is an overall sectional view, and FIGS. 5 and 6 are perspective views showing the retaining ring and the upper part of the main valve body. A...Inflow pipe, B...Outflow pipe, 1...Valve box, 1
A... Main valve seat, 2... Solenoid pipe, 3... Electromagnetic coil, 4... Fixed iron core, 5... Main valve body, 5A...
...Fluid path, 6...Movable iron core, 7...Sub-valve seat, 8
...Return spring, 9...Sub-valve body, 10...Retaining ring,
14...Claw portion, 15...Through hole, 16...Annular groove.

Claims (1)

[Scope of utility model registration request] A cylinder inside a valve box 1, which has a main valve seat 1A that partitions an inflow pipe A and an outflow pipe B at one end, and is closed at the other end by a solenoid pipe 2 and a fixed iron core 4, which are provided with an electromagnetic coil 3 on the outer periphery. A main valve body 5 that seals the main valve seat 1A and a movable iron core 6 operated by the electromagnetic coil 3 are arranged in a slidable manner in the space. A fluid path 5A communicating with the outflow pipe B is provided on the line, and an auxiliary valve seat 7 is formed at the end of the fluid path 5A on the side of the movable iron core. In a two-way valve in which the return spring 8 is also provided with an auxiliary valve body 9 on the main valve body side, an annular groove 16 is formed in the internal sliding wall surface of the valve body 1, and an outer peripheral portion made of an elastic material and formed in a dish shape. A retaining ring 10 is provided with pawls 14 spaced apart from each other in the circumferential direction, and a retaining ring 10 having a through hole 15 in the center through which the sub-valve body 9 passes is press-fitted into the annular groove 16. Two-way valve.