JPH063230Y2 - Valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Purpose of Invention><Industrial Application Field> The present invention relates to a valve device for switching a flow path of gas, liquid, viscous fluid, etc. The present invention relates to a novel structure capable of eliminating a malfunction or an inoperable state at the time of switching a valve body due to a fluid pressure acting on the bearing valve body.

<Background of the Invention> For example, when a fluid flowing in from one flow passage is selectively discharged to another flow passage, a valve chamber having a valve body is provided in the body of the valve device, and the valve chamber in the valve body is provided. By switching the biased position, the supply system from inflow to outflow is switched. By the way, in this case, when the valve body is shifted by another power to bias one side of the valve chamber to form a desired supply system, the pressure of the fluid pushes the valve body to the side further biased. Act on. This action itself is preferable in that it prevents fluid from leaking to the supply system to be cut, but when the valve is to be switched next time, the valve body must be shifted against the pressure of the fluid. Therefore, it is impossible to directly actuate a solenoid that can switch quickly with the simplest mechanism because the load is too large, so such a direct-acting method using a solenoid is appreciated for its advantages but low fluid pressure. The application target was limited, such as in case of low viscosity liquid or handling of gas. When handling a high-pressure fluid or a high-viscosity liquid, in most cases, the supplied fluid is led out from a small-diameter pilot hole and the pressure energy is accumulated to obtain the valve switching operating pressure. . For this reason, it is necessary to separately form the flow path of the pilot system and the pressure accumulating chamber, which complicates the structure, and inevitably a certain time lag occurs in the operation with such a method. The complicated structure of the flow path of the pilot system means that in the case of a liquid with high viscosity or a liquid in which solidified particles are mixed, this may block the pores of the pilot system or the inside of the holes of the pilot system. In this case, the fluid may be solidified and may not operate sufficiently. Eventually, even such a pilot type valve switching mechanism has not been sufficiently dealt with. Therefore, in the case of such a difficult-to-handle fluid, a ball valve or the like that simply connects and disconnects one system of flow path is installed in parallel, and the space occupied by the device becomes excessive, and the device cost is increased. There are various inconveniences such as an increase in.

<Technical Items Tried to Develop> The present invention has been made in view of such a background,
The present inventor has taken the form of a simple direct-acting, one-body type valve device, while using a high-pressure fluid, high-viscosity fluid, or liquid in which amorphous solid matter is mixed, which was difficult to handle in the past. This is an attempt to develop a new valve device that can be applied.

<Structure of Device><Means for Achieving the Purpose> That is, the valve device according to the present invention is provided with one or a plurality of valve chambers in which a valve body is installed in the body, and by switching the biased position of the valve body in the valve chamber. In a device for switching communication states of a plurality of channels connected to a valve chamber, the valve body is attached to one valve rod, and the valve rod is a fluid of a communication chamber connected to the valve chamber at an end of a body. The present invention is characterized in that it is supported by a pressure receiving plate having flexibility to receive a pressure, and thus it is intended to achieve the above object.

<Operation of the Invention> In the present invention, since the valve rod supporting the valve body is supported at both ends by the flexible pressure receiving plate provided to receive the fluid pressure from the communication chamber communicating with the valve chamber, Even if the fluid pressure acts, one of the pressure receiving plates receives pressure in the direction that always eliminates it, and when looking through the entire valve body, the fluid pressure is not applied in only one direction, which results in high viscosity. Alternatively, even with high-pressure fluid, the switching operation of the valve element can be reliably performed by directly driving the solenoid.

<Embodiment> The present invention will be specifically described below based on an illustrated embodiment. Reference numeral 1 denotes a valve device according to the present invention, which is, for example, a liquid for operating a manipulator of an industrial robot,
It can be used as a valve for distributing gas or the like, a supply switching system for food such as liquid beverage, or a valve for switching any other fluid. In the embodiment shown in FIGS. 1 to 3, this valve device 1 is of a so-called three-way valve type in which one inflow conduit 2 and two outflow conduits 3 are connected. When a plurality of inflow conduits 2 and 3 are provided, they are distinguished from each other and are referred to as 2A, 2B, ... Or 3
The suffixes A, 3B, ... Further, the valve device 1 integrally includes a solenoid 5 as its drive source. The valve device 1 will be described in detail below. As an example, stainless steel,
The inflow conduit 2 is provided in the body 10 made of brass, synthetic resin or the like.
The outflow pipe line 3 and the solenoid 5 are attached, and the body 10 has a cylindrical outer shape as an example.
In manufacturing, the body 10 is axially divided into, for example, two parts at substantially the center thereof. A connecting portion 12 for receiving the inflow conduit 2 and a connecting portion 13 for receiving the outflow conduit 3 are formed on the outer peripheral portion of the body 10, and both have a tapered screw-like fitting structure. Further, a valve chamber 15 is formed substantially at the center of the body 10, and a communication chamber 16 through which the fluid A can pass is formed from the valve chamber 15 toward both axial ends of the body 10. Then, a relay hole 17 is formed between the valve chamber 15 or the communication chamber 16 and the connecting portions 12 and 13.
Incidentally, for example, a branch passage from the inflow pipe line 2 to the connection part 12, from the relay hole 17 to the communication chamber 16, and from the other relay hole 17 to the connection part 13 to the outflow pipe line 3 is substantially the fluid A. To form a flow path. A valve body 20 that switches the flow path of the fluid A is provided in such a valve chamber 15. The valve body 20 penetrates the communication chamber 16 and further the yoke 5 of the solenoid 5 is provided.
Which is provided for the valve rod 21 connected to A,
A lining 22 is provided on the surface thereof, and the lining 22 is configured to be in direct contact with the valve contact surfaces 15a and 15b in the valve chamber 15. Further, as a characteristic configuration of the present invention, the valve rod 21 is supported by pressure receiving plates 23 at both axial ends of the body 10. When the pressure receiving plates 23 are displayed separately, the pressure receiving plate on the solenoid 5 side is shown as 23A and the pressure receiving plate on the other end side is shown as 23B. And this pressure plate 23 is a valve rod
The communication chamber 16 that supports the valve chamber 21 and communicates with the valve chamber 15 is closed at both ends to be in a hermetically sealed state, and is made of, for example, a flexible diaphragm-shaped material. The pressure receiving plate 23 is fixed to the body 10 by fixing the periphery of the pressure receiving plate 23 through a press ring 24, and for example, bolts and nuts for assembling the body 10.
It is configured to be fixed by 25. Of course, the means for fixing the holding ring 24 may be held by a bolt independent of the bolt and nut for assembling the body 10. Further, in this embodiment, the set spring 26 is provided in the communication chamber 16 on the solenoid 5 side,
The set spring 26 may push the valve rod 21 in a constant direction at all times so that the valve body 20 always secures a bias toward one side. The valve element 20 can be set in a desired state, and the solenoid 5
It is sufficient that the valve body 20 has an action of returning to the initial standby position when the shift due to is released. In addition, the set spring 26 is provided in the communication chamber 16 in this way,
This may be provided outside, or need not be provided if not needed.

One embodiment of the present invention has the structure as described above and operates as follows. First, the state shown in FIG. 3 (a) will be described as the initial state. In this state, the valve spring 21 is pushed up to the solenoid 5 side by the push-up action of the set spring 26, and the valve disc 21 is pushed up. 20 is set in a state of being biased toward the valve contact surface 15a side of the valve chamber 15. In this state, for example, the fluid A from the inflow conduit 2A passes through the valve chamber 15 and as shown by the arrow, the outflow conduit 3
It flows to the B side. At this time, the pressure of the fluid A naturally acts on the valve body 20 to move the valve body 20 against the valve contact surface as indicated by an arrow P _1.
It acts as a pressure to press against 15a. On the other hand, the pressure of the fluid A is the communication chamber in which the outflow conduit 3B is in communication.
It acts on the side of 16 and also acts as pressure P ₂ on the side of the pressure receiving plate 23B. If this by looking at the force on the valve stem 21 integral with the valve body 20, though the valve 20 is a pressure P ₁ that is pressed against the surface 15a side per valve, the pressure P ₂ Togahobo the pressure receiving plate 23B is pressed against the outer They cancel each other out so that excessive bias pressure is not generated on the valve rod 21. Then, from this state, the solenoid 5 is excited, for example, and the yoke 5 is
When A is projected, the valve rod 21 can be moved sufficiently as shown in FIG. 3 (b) with a force about the direct pushing force of the solenoid 5. When shifted in this way, the valve body 20 is biased to the valve contact surface 15b side in the valve chamber 15 and the previously formed conduit from the inflow conduit 2A to the outflow conduit 3B is closed. A flow path is formed from the inflow conduit 2 through the valve chamber 15 to the outflow conduit 3A. At this time as well, in the valve chamber 15, the valve body 20 receives the pressure P ₃ that is pressed against the valve contact surface 15b side, and the pressure receiving plate 23 that supports the valve rod 21 is pressed toward the solenoid 5 side. When P ₄ is received and the respective pressures P ₃ and P ₄ are erased from each other, the valve body 20 is simply switched by the pushing force of the solenoid 5.

Although the present invention has a basic embodiment of the three-way valve as described above, a four-way valve and a multi-system valve configuration are possible based on this technical idea. For example, the embodiment shown in FIGS. 4 and 5 is a case where a four-way valve is constructed, which basically has the same construction as the above-mentioned embodiment, but as an example, the valve rod 21 The central portion is hollowed out to have a rod core relay hole 27. Also in this case, as shown in FIG. 5A, when the valve bodies 20 are biased toward the valve contact surface 15a side by the set spring 26 in the initial state, the system from the inflow conduit 2A is the solenoid 5 Communication chamber through the valve chamber 15 on the side
A route from 16 to the outflow pipe 3B is formed,
A path from the inflow conduit 2B to the outflow conduit 3A is formed through the valve chamber 15 on the side separated from the solenoid 5, the rod core relay hole 27, the communication chamber 16 on the solenoid 5 side, and the outflow conduit 3A.
In this case as well, the pressures applied to the respective valve bodies 20 and the pressure receiving plate 23 are in such a form that they are substantially eliminated from each other, and thereafter, there is no obstacle to the shift of the valve rod 21. Next, as shown in FIG. 5 (b), the yoke 5A of the solenoid 5 is projected so that the valve rod 21 is pushed in, so that the valve body 20 is biased toward the valve contact surface 15b side, and from the inflow pipe line 2A to the outflow pipe line, respectively. 3A and a path from the inflow conduit 2B to the outflow conduit 3B are formed.

<Effect of the Invention> As described above, the present invention supports the valve rod 21 at the front and rear ends through the pressure receiving plates 23 that receive the fluid pressure in the valve chamber 15, so that the pressures generated by the fluid A cancel each other out. Even when the valve body 20 is biased to one side, it is possible to directly drive (directly move) even by a solenoid or the like having a comparatively weak driving force without causing an excessive pressing pressure even when the valve body 20 is biased to one side.
This makes it possible to make the main valve device compact as a whole. Further, since the structure is extremely simple and there are no pilot holes or the like, there is no problem even when handling a liquid having a relatively high viscosity or a liquid such as a soft drink which is hard to be solidified by containing sugar. Absent.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a valve device of the present invention, FIG. 2 is a front view showing the essential part of the valve device in a broken manner, FIG. 3 is a longitudinal sectional view showing an operating state of the valve device, and FIG. FIG. 5 is a vertical sectional view showing another embodiment of the valve device, and FIG. 5 is a vertical sectional view showing an operating state of the valve device. 1; Valve device 2, 2A, 2B; Inflow pipe line 3, 3A, 3B; Outflow pipe line 5; Solenoid 5A; Yoke 10; Body 12, 13; Connection part 15; Valve chamber 15a, 15b; Valve contact surface 16; Communication chamber 17; relay hole 20; valve body 21; valve rod 22; linings 23, 23A, 23B; pressure plate 24; pressure ring 25; bolts and nuts 26; set spring 27; rod core relay hole A; fluid P ₁ , P ₂ , P ₃ , P ₄ ; pressure

Claims (1)

[Scope of utility model registration request] 1. A body is provided with one or a plurality of valve chambers in which a valve body is installed, and by switching a biased position of the valve body in the valve chamber, a communication state of flow paths of a plurality of systems connected to the valve chamber is switched. In the apparatus, the valve body is attached to a single valve stem, and the valve stem is supported by a flexible pressure receiving plate which receives fluid pressure of a communication chamber communicating with the valve chamber at an end of the body. A valve device characterized by being present.