JPS6044671A - Poppet type fluid control valve - Google Patents

Abstract

PURPOSE:To obtain a three-way transfer control valve having simple structure and low cost and pressure-balanced even at a high pressure by forming a poppet valve body operated by an electromagnetic force with same elements put together back to back and stroke-coupling and tightening with two seat edges corresponding to them. CONSTITUTION:A bush 7 arranged to be coupled and fixed in a hole 14 bored in a housing 5 is constituted with two pieces 7a, 7b split near the center in the same shape, and annular seat edges 10, 11 are arranged to face individual pieces. A poppet valve body 6 has a poppet 15 formed with conical surfaces 17, 18 having a diameter larger than that of the seat edges 10, 11 back to back in the center, and land sections 23, 24 at both ends are slided with the center hole 13 of the bush 7. When an electromagnet unit 20 is energized, it reliably presses and tightens the poppet valve body 6 to the seat edge section 10 via a push rod 12.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a poppet type electromagnetically operated, pressure-balanced disconnection connection for working fluid between ports of a hydraulic/pneumatic cell used in general industry. -Relates to a fluid control machine that is a three-way control machine that can be operated by a mechanism.

In the conventional technology, for example, in Japanese Patent Publication No. 49-10371, the valve body constituting the three squares is composed of a spherical closing member, and the valve body has a % It cannot operate with working fluid at normal pressure. On the other hand, in the prior art, for example, JP-A No. 50-1422, pressure compensation is performed to solve the above problem, but only by changing the passage of the working fluid from open to closed or from closed to open by excitation of a solenoid coil. It is not a so-called three-way valve configuration in which one side changes from open to closed and the other side changes from closed to open.

The object of the invention is to obtain a poppet-type fluid control valve that uses a poppet valve body mechanism, that is, a three-way switching control valve that can greatly increase the switching layer, has a simple force and structure, and is inexpensive. There is a particular thing.

Another object of the invention is to provide an inexpensive three-way switching valve using a poppet valve mechanism with extremely high precision.

For this reason, the present invention provides an electromagnetically operated poppet-type fluid system having a bushing and a poppet valve disposed within a housing, wherein the bushing is composed of two or more pieces divided approximately at the center. 9, axially arranged to face the center, two sheet edges in the shape of an rcEJ, a central port communicating with an annular groove formed by the two sheet edges, and both sides of the central port. The two ports drilled in the poppet valve body are respectively arranged in a central hole provided through the bushing in the axial direction, and the poppet valve body slides with land portions at both ends guided in the central hole. a 1 m cone with a diameter larger than the sheet edge on both sides, which is inserted so that it can be inserted and can be moved in the axial direction into the annular groove;
The poppet valve body is located in the center hole, one end surface is biased by a spring, the other end surface is capable of contacting with a bushing rod of an electromagnetic device, and there is a differential pressure between the two end surfaces. This is a poppet-type fluid control cell characterized by almost pressure compensation so that the pressure does not rise. With this configuration, the poppet valve actuated by stroke displacement caused by electromagnetic force is configured with the same elements back to back, and its stroke engagement with the corresponding two seat edges is closed, thereby achieving pressure balance even under heavy pressure. The 3-way switching device has a simple structure, a small number of parts, and can be manufactured at low cost. Furthermore, the poppet valve body (is accommodated in an axially movable manner within the annular groove formed between the seat edges in the approximate center, so the structure is simple, and one end face of the housing and bushing, and one end face of the spool). (1) It is possible to provide a 3-way switching valve using a poppet valve element, which is extremely easy to process and has a thin sheath, at a low cost.

Below, embodiments of the invention will be explained with reference to the drawings.
The bushing (7), which is fitted and fixed in the hole U4 drilled in the housing (5), is divided into two substantially identical pieces (7a buff b) divided at about the center in the non-embodiment. In the trough section, the annular sheet edge (to) (1υ) is arranged opposite to each other. It may be divided by another part such as a flat surface for burning.Also, the sheet edge (ltj circle may be moved to the left and right to some extent.) The central hole is connected to the housing (5) along the central boat (2) which can communicate with the outside.
21 ports (11 (24) are arranged in the 100-1 rule, and the central boat (2) is communicated with the annular groove (4) where the annular seat edge αclun is formed.The central port (
2) is communicated with the connection port (C) by the oil passage (8), and the port (1) is communicated with the connection port Q]) by the oil passage (A), and the port (2) is also separated by an oil passage (not shown). It communicates with a connection port provided on the outside of the housing (5). The poppet valve body (6) is inserted into the central hole (to), and the land portions (c) and (b) at both ends slide into the central hole u3 and are thereby guided so as to be movable in the axial direction. The poppet valve body (6) has four poppets formed back to back with a conical surface u'a (with a diameter larger than 1η) in the center, and the poppet αυ has an annular groove formed by an annular seat edge. (4) so as to be movable in the axial direction.One end of the poppet valve body (6) is biased by a spring μQ provided in the housing (5), and the other end is biased by an electromagnet device (E). Bush Rod α
2, and in the illustrated state in which the electromagnet device (7) is not energized, the spring Q is connected to the electromagnet device (plane t2) to the right of the poppet valve body (6) when viewed from the figure. The conical surface μ is pressed toward the annular sheet edge Qυ
and is closed to the central port (21i bow H1). In order to compensate for the wear of the seat edge Qη, a slight gap is provided between the blood Qυ and the end face (A) of the poppet valve body (6).

In the case shown in Figure 1, the surface of the housing (C), the surface of the bushing and the end surface (B) of the poppet valve body (6) are on the same plane. ), the pressure is compensated so that there is no differential pressure between the two end faces.It will be understood by those skilled in the art that the through hole (9) can be provided in the bushing (7) instead of in the poppet valve body (6). In the embodiment, the housing (5) is approximately square in cross section perpendicular to the axis, and the pushbutton (7) is approximately rectangular.
Although the poppet valve body (6) is circular, it may have other shapes. Oil leakage between the inner surface of the hole α◆ of the housing (5) and the outer circumferential surface of the bushing (7) is minimized, and sufficient cylindrical counterfeiting is performed to prevent the bushing from being damaged when inserted.

When the electromagnetic device is de-energized, the spring 4 in the housing (5) operates the poppet valve (
6) is pushed to the right as seen in the figure, and is closed by contacting the conical surface Orr1 annular sorting edge (1υ), and the spring uQ controls the stroke displacement of the movable core (not shown) of the electromagnet device to the poppet valve body. (6) is returned to the de-energized position. In this state, the port (1) is on the block side, and the central port (
2) and port (3) are open. When the electromagnet device ψJ is energized, the movable iron core (not shown) makes a stroke displacement and the poppet valve body (6) pushes the spring qQ to open the valve (the conical surface α mark of 1υ is the seat on the opposite side). It comes into contact with the edge Cl0) and closes. In this state, port (1) and center port 1 (2) are in communication, and port (3) is in a closed state. For example, if the working fluid is supplied from port (1), the center port (2) is connected to the actuator, and the port (3) is connected to the return line, when the electromagnetic device is de-energized, the supply The working fluid is blocked at port (1) and is passed from the central port (2) connected to the actuator to the return port (3).
), so no working fluid flows through the central port (2) and the actuator. When the electromagnetic device (e) is energized, the supplied working fluid is communicated from port (1) to central port (2), and almost simultaneously, communication from central port (2) to port (3J) is closed. As a result, the actuating fluid will flow to the central port (2) and the actuator will operate.

The annular groove (4) formed by the opposing annular sheet edge (10 (1υ) extends to a larger diameter than the central hole q3, and the conical surface (1η4) of the poppet αQ and the seat edge (tQ (1) At the same time, it is possible to close the connection from port (1) to center port (2), or from center port (2) to port 1-.
(A gap is provided to the extent that there is almost no resistance to the flow of the working fluid to 31.) The axial distance L1 between the opposing annular sheet edges (10 (11) is the conical surface 0 of the poppet αe. The axial distance L2 between the contact portion with the seat edge of μs is made larger by the stroke of the poppet valve (6), that is, L = 112 + S.

When the electromagnet device (a) is excited, the movable iron core (not shown) pushes the poppet valve body (6) through the bushing rod (one) and performs a stroke operation, the end 1ffi (a) of the poppet valve body (6) is activated by the electromagnet. On the side of the device (from 2 →, make it slightly thicker than the stroke stroke S to 5p), when the amstone device is energized, the movable iron core passes through the bushing rod (1) and the poppet valve body (6) to the seat edge (
l[) to ensure the closing.

In this way, by making the valve housing (5), pusher (7), and poppet valve body (6) on the same plane at the end face on the electromagnet device side, and installing the electromagnet device based on the blood, for example, Poppet valve body stroke 3
Since it is possible to produce valves with extremely high quality and high accuracy, it is extremely advantageous in terms of quality stabilization and manufacturing.

As mentioned above, the axial distance L1 between the two opposing sheet edges (lη) is larger by the distance S than the axial distance L2 between the contact portion of the conical surface αη(tS) of the poppet α with the sorting edge. However, there are three bushings, and two seat edges (one is a cylindrical piece that forms the cylindrical part, and the other is a cylindrical piece that forms an annular groove (4) and has a larger diameter and an axial length between the seat edges. Even if it consists of a cylindrical piece having an axial distance of
On each end surface (c) as shown in the figure, the surface that can come into contact with the electromagnetic device (surface (2) of 4) can be placed on one plane in the direction of the electromagnetic device.

'fllj + The operation of the area reducing device (e) is well known and will therefore be omitted.

[Brief explanation of the drawing]

The drawing is a cross-sectional structural view taken along the axis of a poppet valve body showing an exemplary embodiment of the present invention. 1.3...Port 2...Central port 4...Annular groove 5...Using 6...Poppet valve body 7
...buttons 7a, 7b...piece 10.11.
...Nut edge 12... Butsch rod 13...
Central hole 15...Poppet 16...Spring 17.
18... Conical surface 20... Electromagnet device 23.24.
...Land Department 25, 26.27...Representative agent Patent attorney Jun Kawachi Procedural amendment Written October C, 1982 Commissioner of the Patent Office Kazuo Wakasugi 1, Indication of case 1988 Patent Application No. 151484 2, Name of the invention Poppet type fluid control valve 3, Relationship to the case of the person making the amendment Patent applicant name (519) Fuji Koshi 4 Co., Ltd. Agent residence 2-chome, Shibakoen, Minato-ku, Tokyo 4-1 Hidekazu Shiba Park Building 3rd floor Voluntary 6, subject to correction

Claims (2)

[Claims] (1) In an electromagnetically operated poppet-type fluid control valve having a bushing and a poppet valve disposed in a housing, the bushing is composed of two or more pieces divided approximately at the center, and has four axial directions. Two annular seat edges placed opposite to each other in the center of the seat, a central port communicating with the annular groove formed by the two sheet edges, and two ports bored on both sides of the central port. The poppet valve body is arranged in a central hole provided axially through each bushing, and the poppet valve body is slidably inserted into the annular groove with land portions at both ends guided in the central hole. A poppet 1 is inserted movably in the direction and has conical surfaces larger in diameter than the seat edge formed back to back on both sides thereof, the poppet valve body is located in the central hole, one end 711 is biased by a spring, and the other end surface is 1. A poppet type fluid control valve, which is capable of coming into contact with a bushing rod of an electromagnetic device, and is substantially pressure-compensated so that no differential pressure is created between both end faces. (2) When the electromagnet device does not operate, the poppet valve body is pressed by the spring so that the conical surface on the side opposite to the spring comes into contact with one of the sorting edges hiJ, and the other end of the poppet valve body 2. The poppet-type fluid control box according to claim 1, wherein the spring-side end surfaces of the housing and the IJ are on the same plane.