JPS6213882A - 5-port solenoid valve - Google Patents

Abstract

PURPOSE:To seat the valve body reliably in the valve seat by enabling relative motion to two valves between the position where one valve will have a gap against the valve seat upon seating of the other valve and the position where both valve bodies are seated simultaneously. CONSTITUTION:First and second valve sections 8b, 9b are arranged such that upon seating of one valve section in the valve seat, the other valve section will separate from the valve seat. A connecting rod 17 will penetrate through the valve bodies 3a, 3b to prevent from falling by means of the stop rings 18, 19 formed on said rod 17. Said valve sections 8a, 9a will close supply valve seats 4, 5 when sealing through the differential area and held at the respective switching position even when the fluid pressure of pilot valves 15, 16 will not function.

Description

[Detailed description of the invention] Limb blood light! The present invention has a main body having a supply port, two output ports, and two discharge ports, and two valve bodies disposed coaxially on the main body and connected to each other, which are switched by an external pilot valve. This invention relates to a controlled 5-port solenoid valve.

As a five-port electromagnetic valve that is controlled by an external pilot valve, for example, a valve as shown in FIG. 2 is known.

In conventional solenoid valves, there are a supply port P and two output ports A.
, B, and two valve seats 53.54 provided in the flow paths connecting each output port A, B and the discharge ports Rt, Rz, respectively. One valve body 56 is housed in a main body 55 having a main body 55. In the first switching position of the valve body 56, the first valve part 57 is in contact with the valve seat 51, and the fourth valve part 6 is in contact with the valve seat 51.
0 is seated on the valve seat 54, and the second valve part 58 and the third valve part 59 are separated from the valve seat. In the second switching position, the second valve part 58 is seated on the valve seat 52, and the third valve part 59 is seated on the valve seat 54. The valve seat 53 is seated, and the first valve part 57 and the fourth valve part 60 are separated from the valve seat. The spacing between each valve part and the spacing between each valve seat are related to processing accuracy, and dimensional errors cannot be avoided. Therefore, unless the position of either the valve seat or the valve part is adjustable, the two valve parts will not be able to accurately seat on each valve seat at each switching position, and the gap between either valve part and the valve seat will be There will be a gap. In order to solve this problem, it is known that the valve seats 53 and 54 are screwed onto the main body as shown in FIG. In this case, positioning the valve seat is a complicated and time-consuming task, and it is not always possible to adjust the valve seat to ensure accurate seating.

. The present invention solves the above problem by configuring the valve body by two separate valve bodies disposed coaxially and facing each other, and each valve body has a first valve body.
It has a valve portion, a second valve portion, and a driving piston portion, the first valve portion is seated on a supply valve seat provided in a flow path connecting a supply port and an output port, and the second valve portion is seated on a supply valve seat provided in a flow path connecting a supply port and an output port. The piston is slidably guided into the cylinder chamber of the main body, and the piston is slidably guided into the cylinder chamber of the main body, and the piston is slidably guided into the cylinder chamber of the main body. The first valve part and the second valve part are provided with a difference in area from each other so that the pressure receiving area of the valve part which receives pressure in the direction of closing the supply valve seat at the time of sealing becomes large.
The two valve bodies are connected to each other by a connecting rod so that they can move relative to each other between a position where one valve body is seated and the other is slightly spaced from the valve seat, and a position where both valve bodies are seated at the same time. The problem was solved by a five-port electromagnetic valve characterized in that the output of the valve is connected to the cylinder chamber outside the piston part of one valve body and inside the piston part of the other valve body, respectively.

The structure and operation of the present invention will be explained in detail with reference to embodiments shown in the drawings.

In FIG. 1, a valve chamber 2 is formed in a main body 1, and the valve chamber 2 includes two valve bodies, namely a first valve body 3a and a second valve body 3b.
are arranged coaxially and facing each other in opposite directions. The main body 1 is formed with a supply port P, two output ports, namely a first output port A and a second output port B, and two discharge ports, namely a first discharge port R1 and a second discharge port R2,
A first valve seat 4 is formed as a supply valve seat in the flow path connecting the supply port P and the first output port A, and a second valve seat 5 is formed as a supply valve seat in the flow path connecting the supply port P and the second output port B. A third valve seat 6 is located in the flow path connecting the first output port A and the first discharge port R1, and a fourth valve seat 7 is located in the flow path connecting the second output port B and the second discharge port R2. is formed as.

The first valve body 3a has a first valve portion 8a, a second valve portion 9a, and a piston portion 10a, and the second valve body 3b has a first valve portion 8b and a second valve portion 9a.
It has a valve part 9b and a piston part 10b. First valve body 3a
The first valve part 8a is seated on the first valve seat 4, the second valve part 9a is formed to be seated on the third valve seat 6 from the opposite direction to the first valve part 8a, and the first valve part 8a is seated on the third valve seat 6 from the opposite direction. and the second valve portion 9a are arranged so that when one is seated on the valve seat, the other is away from the valve seat. Similarly, the first valve body 3b
The valve part 8b is seated on the second valve seat 5, and the second valve part 9b is formed so as to be seated on the fourth valve seat 7 from the opposite direction to the first valve part 8b. The arrangement is such that when either one of the valve portions 9b is seated on the valve seat, the other is away from the valve seat. Both valve bodies 3a and 3b are connected by a connecting rod 17. The connecting rod 17 passes through both the valve bodies 3a and 3b, and is prevented from falling off by a collar formed on the connecting rod 17 or a retaining ring or nut 18, 19 attached to the connecting rod 17. The inner flange or retaining ring or nut 18 is connected to the valve parts 8a and 9b or 8 on which both valve bodies are seated at the same time.
The positions are set so that the valve bodies 3a and 3b are in contact with the ring or nut 18 at a position where the distance between b and 9a is slightly smaller than the distance between the valve seats 4 and 7 or 5 and 6, and the outer ring or nut 19 is The position where the valve element 3a or 3b is fixed to the connecting rod is set so that when one valve element 3a or 3b is seated on the valve seat, the other valve element can move relative to the connecting rod to a position where the other valve element is seated on the valve seat. This causes both valve bodies to move simultaneously in the same direction.

Two cylinder chambers 11 and 12 are formed in the main body 1,
The first cylinder chamber 11 has a piston portion 1 of the first valve body 3a.
0a, a piston portion 10b of the second valve body 3b is slidably guided in the second cylinder chamber 12.

The space between the valve chamber 2 and the first cylinder chamber 11 is sealed by the sliding body part 13a of the first valve body 3a, and the space between the valve chamber 2 and the second cylinder chamber 12 is sealed by the sliding body part 13b of the second valve body 3b. sealed by.

A pilot supply port) PP is formed in the main body 1 at a portion where the supply port P of the valve chamber 2 is open, and a first pilot supply port) PP is formed in the first cylinder chamber 11 on the outside with the piston portion 10a in between. A 1 is formed inside the second pilot port 12, and the second cylinder chamber 12 is similarly formed.
A third pilot port PBi is formed on the inside with the piston portion 10b in between, and a fourth pilot port PB2 is formed on the outside.

The pilot supply port PP is connected to the inlet ports of the first pilot valve 15 and the second pilot valve 16 by a flow path 14. The outlet port of the first pilot valve 15 is connected to the cylinder chamber outside the piston portion of one valve body, for example, to the first pilot valve 15.
Connect the first pilot port PAi of the cylinder chamber 11 to the cylinder chamber inside the piston part of the other valve body, for example, the third pilot port PB of the second cylinder chamber 12.
The outlet port of the second pilot valve 16 is connected to the cylinder chamber inside the piston section of one valve body, for example, to the second pilot port PA2 of the first cylinder chamber 11, and the outlet port is connected to the cylinder chamber inside the piston section of the other valve body. into the cylinder chamber,
For example, the fourth pilot port P of the second cylinder chamber 12
Connected to B2.

The first valve part 8a or 8b of the first and second valve body 3 and the second valve part 8a or 8b of the first and second valve body 3
The valve portions 9a and 9b are designed to have a different area from each other so that the pressure receiving area of the valve portion that receives the pressure in the closing direction of the supply valve seat 4.5 during sealing becomes large. For example, in the example shown in FIG. 1, the pressure-receiving areas of the second valve parts 9a and 9b that receive fluid pressure in the direction of pressing the first valve parts 8a and 8b against the first valve seat 4 and the second valve seat 5 during sealing are the first. It is set to be larger than the pressure receiving area of the valve parts 8a and 8b. Thereby, the first valve body 3a and the second valve body 3b can be held at their respective switching positions even when the fluid pressure of the pilot valve is not applied.

When the first pilot valve 15 is ON and the second pilot valve 16 is OFF, the first pilot port PA1 and the third pilot port PBt are in the discharge state. The first valve body 3a and the second valve body 3b are moved to the left in the figure by the fluid pressure. As a result, first the first valve part 8b of the second valve body 3b is seated on the second valve seat, and then the first valve body 3a is moved slightly and the second valve part 9a is seated on the third valve seat 6.

Since the first valve seat 4 is opened and the third valve seat 6 is closed, fluid is supplied from the first port A, and the second output port B is supplied from the second port A.
(ejection bow) R2 and enters the ejection state. The first pilot valve 15 is OFF and the second pilot valve 16- is ON.
At this time, the first pilot port PA1 and the third pilot port PB1 receive the pressure of the pilot fluid, and the second pilot port PAz and the fourth pilot port PB2 are in the discharge state, so the valve bodies 3a and 3b are moved to the right in the figure. Moving. First, the first valve part 8a of the first valve body 3a is seated on the valve seat 4, and then the second valve body 3b is moved by the gap between the valve part and the valve seat, and the second valve part 9b is seated on the valve seat 7. Become seated. When both pilot valves 15, 16 are ON, the valve body becomes unstable, so make sure that both pilot valves 15, 16 are not turned ON at the same time.

1, the first valve part 8a is seated on the first valve seat 4 from the right side in the figure, the first valve part 8b is seated on the second valve seat 5 from the left side in the figure, and the second valve part 9a is seated on the second valve seat 5 from the left side in the figure. It is also possible to modify the third valve seat 6 so that it is seated from the left side in the figure, and the second valve part 8b is seated on the fourth valve seat 7 from the right side in the figure.

As a result, since two valve bodies are used according to the present invention, the valve parts of both valve bodies can be securely seated on the valve seat, and are not affected by machining accuracy. According to the present invention, two valve bodies having the same shape and size can be used, improving productivity.

Further, according to the present invention, each valve body can be reliably held in any switching position without the need for a separate holding mechanism.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a 5-port solenoid valve according to the present invention, and FIG. 2 is a sectional view of a conventional 5-port solenoid valve. l...Main body 3a, 3b...Valve body 4.5
...Supply valve seat 6.7...Discharge valve seat 8a, 8b.
...First valve part 9a, 9b...Second valve part 10a, 10b...Piston part 11...First cylinder chamber 12...Second cylinder chamber 15.16...Pilot valve 17.・Connecting rod

Claims (1)

[Claims] (1) A main body having a supply port, two output ports, and two discharge ports, a valve body that can reciprocate within the main body, and a pilot valve connected to the main body. In the port electromagnetic valve, the valve body is composed of two separate valve bodies arranged coaxially and facing each other in opposite directions,
Each valve body has a first valve part, a second valve part, and a driving piston part, and the first valve part is seated on a supply valve seat provided in a flow path connecting a supply port and an output port, and The second valve part is formed to sit in a direction opposite to the first valve part on a discharge valve seat provided in a flow path connecting the output port and the discharge port, and the piston part slides into the cylinder chamber of the main body. The first valve part and the second valve part of each valve body are provided with a difference in area from each other so that the pressure receiving area of the valve part which receives pressure in the direction of closing the supply valve seat at the time of sealing is large. The valve bodies are connected to each other by a connecting rod so that they can move relative to each other between a position where one valve body is seated and the other is slightly spaced from the valve seat, and a position where both valve bodies are seated at the same time. A 5-port solenoid valve characterized in that the outputs are connected to a cylinder chamber at a position outside the piston part of one valve body and at a position inside the piston part of the other valve body.