JPH0351566Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a structure for attaching an embedded control valve to a block-shaped base material.

Conventional technology Many control valves are used in refrigeration equipment, hydraulic and pneumatic equipment, etc., but in order to make the control parts of these equipment smaller and easier to assemble, blocks with internal fluid passages have been developed. It has become common practice to arrange and mount control devices such as valves on a shaped substrate. When the number of fluid passages connected to these control devices is small, such as safety valves and pressure gauges, it is easy to connect these control devices by simply placing them on the surface of a block-shaped base. can be assembled into. However, when there are many passages for controlled fluid such as flow path switching valves and pressure control valves, or when passages for control fluid are added, it is necessary to connect the fluid inlet and outlet of each of these devices and the block-shaped base. Since it is necessary to connect each fluid passage independently,
As a mounting structure that satisfies these conditions, there is one in which the equipment to be mounted is formed into a cylindrical shape and is fitted into a circular hole provided in a block-shaped base.

In such a mounting structure, an O-ring or the like is fitted to a cylindrical device and inserted into a circular hole to prevent fluid leakage between fluid passages. Ta. When the device is a control valve or the like, for example, as shown in Fig. 2, the edge a of the diaphragm attachment part, etc. is attached to the edge b of the attachment hole to prevent the valve A from falling out of the attachment hole H of the block body B.
In the past, parts were fixed by brazing or caulking, but these methods sometimes caused heat to be applied to some parts and distortion to occur, reducing the performance and reliability of the equipment. .

Also, as shown in Figure 3, O-ring c and C-ring d
Depending on the situation, there is a method to achieve sealing at the same time as fixing, but the fluid pressure flowing through valve A exerts a force that pushes out the valve, weakening the sealing performance of O-ring c, so it is not safe and reliable. I felt anxious.

Problems to be Solved When sealing and fixing a cylindrical valve that is subjected to pressure that pushes the entire valve out of the circular hole provided in the block-shaped base as described above, it is difficult to solve the problem regardless of the fluid pressure flowing through the valve. There has been a demand for a sealing mounting structure that provides reliable sealing, high safety, and good installation workability.

Means for Solving the Problem In order to meet such demands, in the present invention, a cylindrical valve with a pressure fluid inlet/outlet provided on the side surface etc. is constructed such that the flow passage for the pressure fluid opens on the inner wall surface. In a device configured to fit into a block body provided with a valve mounting hole and to communicate between the inlet/outlet of the valve and the opening of the block body,
A flange portion provided at the end of the valve and having an outer diameter slightly smaller than the inner diameter of the open end of the valve mounting hole; The valve mounting structure is configured to have a sealing structure including a ring and an annular restraining member that is fitted into the valve mounting hole and has at least an inner surface in contact with the O-ring.

Embodiment In FIG. 1, numeral 1 is a fluid pressure operated flow rate control valve, and numeral 2 is a block body to which the valve 1 is attached.

The block body 2 has a valve mounting hole 2 into which the valve 1 can be fitted.
1 is provided in the inner wall surface 22 of the valve mounting hole 21, a flow path 26 for a working fluid for driving the valve,
27 is open, and flow paths 28 and 2 for controlled fluid are opened.
9 is open.

The valve 1 has a lower lid 11 attached to its upper end portion.
A diaphragm 13 is provided between the upper lid 12 and the upper lid 12, and the space between the diaphragm 13 and the lower lid 11 communicates with an inlet/outlet 14 for working fluid. Further, the space between the diaphragm 13 and the upper lid 12 communicates with an introduction pipe 15 for another working fluid. This valve 1
is configured to have a cylindrical outer shape as a whole and is configured to be able to fit into the valve mounting hole 21, but there is a gap between the inner surface 22 of the valve mounting hole 21 and the outer surface 16 of the valve 1. O-rings 3, 3' are provided,
The working fluid flow paths 26 and 27 and the controlled fluid flow paths 28 and 29 are sealed to prevent leakage.

An annular stepped portion 23 is provided near the open end of the valve mounting hole 21.
is provided so as to be able to engage with the edge of the lower lid 11, and is connected to the outer side surface 17 of the upper lid 12 and the valve mounting hole 21, which is integrally combined with the lower lid to form a flange portion. An O-ring 4 for simultaneously contacting both the inner wall surface 24 of the open end and sealing the gap therebetween.
is provided. Further, above the O-ring 4, an annular restraining member 5 with an L-shaped cross section is attached to the valve mounting hole 2.
1, and O-ring 4 on the inside side.
The O-ring 4 is configured to be able to be pushed toward the outer side surface 17 of the upper lid 12, and to push the O-ring 4 toward the inner wall surface 24 of the valve mounting hole 21. Moreover, this annular restraining member 5
It is supported by a C-ring 6 that is fitted and locked in an annular groove 25 provided in 4 so as not to fall off easily.

Effect In the valve mounting structure of the present invention having a sealing structure using an O-ring configured as described above, a force acts on the valve in a pushing direction due to the working fluid pressure and the controlled fluid pressure. However, the sealing force is further increased by compressing the O-ring, and failures such as leakage do not occur.

Effects of the invention The valve mounting structure of the invention has a simple structure and can be assembled easily and quickly without the need for special jigs and tools. It has the advantage of being able to achieve complete sealing without applying any force. Therefore, the present invention has the advantage of being able to reduce costs and provide a highly reliable product.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the valve mounting structure of the present invention. FIGS. 2 and 3 are explanatory diagrams showing a conventional mounting structure. 1...Valve, 11...Lower lid, 12...Upper lid, 13
...Diaphragm, 14...Working fluid inlet/outlet,
15... Working fluid introduction pipe, 16... Outer surface, 17
... Lateral side. 2...Block body, 21...Valve mounting hole, 22...Inner surface, 23...Step part, 24...
Inner wall surface of open end, 25... annular groove, 26, 27
...Flow path for working fluid, 28, 29...Flow path for controlled fluid. 3, 3', 4...O-ring. 5...
Annular restraining member. 6...C ring.

Claims (1)

[Scope of utility model registration request] A cylindrical valve having an inlet and outlet for pressure fluid on the side surface etc. is fitted into a block body provided with a valve mounting hole in which a flow path for the pressure fluid opens on the inner wall surface, and the inlet and outlet of the valve are connected to the block body. In the device configured to communicate with the openings of the block body, a flange portion provided at an end of the valve and having an outer diameter slightly smaller than an inner diameter of the open end of the valve mounting hole; an O-ring that is in contact with an outer side surface of the valve mounting hole and an inner surface of the valve mounting hole at the same time; and an annular restraining member that is fitted into the valve mounting hole and has at least an inner surface in contact with the O-ring. A valve mounting structure characterized by having a structure.