JPH04129986U - valve device - Google Patents

Abstract

(57) [Summary] [Objective] To provide a valve device capable of resisting the force acting to separate the slide pipe from the valve seat and sufficiently pressing the slide pipe against the valve seat. [Structure] A main body 10 having a flow path formed therein, a valve seat 20 provided in the flow path 18, and a valve seat 20 formed in a cylindrical shape and disposed within the flow path 18 and connected to the valve seat 20. The valve seat 20 is provided so as to be movable toward and away from the valve seat 20, and has an inlet 36 communicating with the flow path 18 at the end surface thereof on the side of the valve seat 20, and an outlet 42 communicating with the flow path 18. When the end face on the valve seat 20 side comes into contact with the valve seat 20,
a slide pipe 32 capable of closing the inflow port 36; and a pressure receiving section provided on the outer peripheral surface of the slide pipe 32 and generating a force to move the slide pipe 32 toward the valve seat 20 when fluid pressure is applied. 40, and a driving means for moving the slide pipe 32 toward and away from the valve seat 20.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a valve device.

0002

[Conventional technology]

Conventionally, as an example of a valve device, there is one disclosed in Utility Model Application No. 58-170462. Ru. This valve device has a slide pipe that slides into the fluid passage inside the main body. At least one end surface of the valve contacts a valve seat provided in the fluid passage so that it can be opened and closed, thereby preventing fluid flow. This is to control this.

0003

[Problem that the idea aims to solve]

However, the conventional valve device described above has the following problems. slide pie If the force to bring one end of the slide pipe into contact with the valve seat is insufficient, try pushing the slide pipe back. If a large force is applied, a gap will be created between one end of the slide pipe and the valve seat. There is an issue of insufficient control. Therefore, the purpose of the present invention is to provide a valve device that can sufficiently control fluid. do.

0004

[Means to solve the problem]

In order to solve the above problems, the present invention has the following configuration. That is, a main body with a flow path formed inside, a valve seat provided in the flow path, and a cylinder. the valve seat is formed in a shape, is disposed within the flow path, and is movable toward and away from the valve seat; The end face on the valve seat side is formed as an inlet communicating with the flow path, and the end face is connected to the flow path. It has a communicating outlet and moves toward the valve seat so that its end face on the valve seat side comes into contact with the valve seat. In this case, a slide pipe that can close the inflow port and an outside of the slide pipe are used. The slide pipe is provided on the peripheral surface and moves toward the valve seat when fluid pressure is applied. A pressure receiving part that generates the force and a drive that moves the slide pipe towards and away from the valve seat. It is characterized by comprising a moving means.

[0005]

[Effect]

The effect will be explained. When fluid pressure acts on the slide pipe, move the slide pipe to the pressure receiving part toward the valve seat. A force is generated to move the Therefore, even if there is a force that tries to move the slide pipe away from the valve seat, it cannot be resisted. It becomes possible to press the slide pipe sufficiently against the valve seat.

[0006]

【Example】

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, the configuration will be explained with reference to FIG. 1. 10 is a main body, which includes a first component 12, a second component 14, and a third component 16. Consists of. The first component 12 is formed into a cylindrical shape with both ends open. First component 1 Female threads are carved on the inner peripheral surfaces of both ends of the second component 14 and the third component 16. are each screwed on. The second component 14 and the third component 16 also have a cylindrical shape. A flow path 18 is formed in the center of the main body 10. 20 is a valve seat, which includes a valve seat seal 22 made of an elastic material; A valve seat seal mounting portion 2 is fixed to the valve seat seal mounting portion 2 and is integrally formed with the second component 14. It consists of 4. The valve seat seal 22 is fixed to the valve seat seal mounting part 24 with a screw 26. has been done. The valve seat seal mounting portion 24 is provided with an opening 28 that communicates with the flow path 18. It is being 30 is an electromagnetic coil which is an example of a driving means, and is arranged within the main body 10. . The electromagnetic coil 30 is arranged so that its center hole is on the same axis as the flow path 18. There is. A slide pipe 32 is made of a magnetic material. slide pipe 3 2 is disposed within the center hole of the electromagnetic coil 30 so as to be freely movable in the axial direction. vinegar The ride pipe 32 is constantly urged toward the valve seat 20 by a coil spring 34. There is. The inlet port 36 that opens at the left end of the slide pipe 32 contacts the valve seat seal 22. When not in use, both ends of the flow path 18 are connected to the opening 28 and the slide pipe 3. 2 through an internal space. Note that 38 is an O-ring that prevents fluid leakage.

[0007] Next, the tip of the slide pipe 32 will be explained with reference to FIG. A pressure receiving part 40 is provided around the outer peripheral surface of the tip of the slide pipe 32 on the inlet 36 side. has been done. The pressure receiving part 40 receives a slide when fluid pressure is applied to the slide pipe 32. A force F that tries to move the id pipe 32 toward the valve seat 20 begins to act. There is. This force F causes the slide pipe 32 to move away from the valve seat 20. Even if it acts on the slide pipe 32, it can be sufficiently counteracted. The tip edge of the inlet 36 of the slide pipe 32 has a cross-sectional shape, for example, as shown in the figure. It is formed in the shape of In addition to the shape shown in the diagram, the shape of the part concerned may be a flat surface, a rounded surface, etc. But it's okay. The reason why the above shape is formed is that the tip edge of the slide pipe 32 is connected to the valve seat seal 22. This is to prevent damage to the valve seat seal 22 when it comes into contact with the valve seat seal 22. In the example shown in Figure 2, When the tip edge of the slide pipe 32 is in contact with the valve seat seal 22, the slide A gap is created between the tip edge of the ride pipe 32 and the valve seat seal 22, and the flow shown by the force f occurs. Body pressure acts, but it is canceled out by force F.

[0008] Next, the operation will be explained. When the electromagnetic coil 30 is de-energized, the slide pipe 32 is a coil spring. Due to the biasing force of the plug 34, the tip edge on the inlet port 36 side comes into contact with the valve seat seal 22, and the fluid The flow is stopped (state in Figure 1). At that time, force F acts on the pressure receiving part 40, so Therefore, the flow of fluid can be stopped more reliably. In the above state, when the electromagnetic coil 30 is energized, the electromagnetic coil 30 emits magnetic force. generated, the slide pipe 32 resists the biasing force of the coil spring 34 and the valve seat 20 move in the direction away from the Then, the fluid flows through the inlet 36 of the slide pipe 32. It becomes possible to enter the inside of the slide pipe 32 from the outside, and it becomes possible to flow out from the outlet 42. A flow path 18 is in communication.

[0009] In the valve device according to this embodiment, by providing the pressure receiving part 40, the slide Although it is possible to reliably bring the pipe 32 into contact with the valve seat 20, the type of valve device is not limited to the valve device of this embodiment, for example, It can also be adopted in a switching valve as disclosed in No. 2. Various preferred embodiments of the present invention have been described above, but the present invention is For example, the driving means may be an external one instead of an electromagnetic coil. The spirit of the invention is such that it is possible to adopt a method of mechanically moving the slide pipe from Of course, many modifications can be made without departing from the above.

0010

[Effect of the idea]

When the valve device according to the present invention is used, when fluid pressure acts on the slide pipe, A force is generated in the pressure receiving part that moves the slide pipe toward the valve seat. Therefore, sura Even if there is a force that tries to separate the slide pipe from the valve seat, it can be counteracted and the slide pipe can be moved away from the valve seat. It becomes possible to press it firmly against the seat. Therefore, the fluid can be controlled sufficiently. It becomes possible to provide a valve device. Furthermore, if the configuration of claim 2 is adopted, the valve seat It has remarkable effects such as being able to suppress damage.

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing an embodiment of a valve device according to the present invention.

FIG. 2 is an enlarged view showing the vicinity of the valve seat in FIG. 1;

[Explanation of symbols]

10 Main body 18 Flow path 20 Valve seat 32 Slide pipe 36 Inlet 40 Pressure receiving part 42 Outlet

Claims (2)

[Scope of utility model registration request] 1. A main body having a flow path formed therein, a valve seat provided in the flow path, and a cylindrical body disposed in the flow path and movable towards and away from the valve seat. The end face on the valve seat side is formed as an inflow port communicating with the flow path, and has an outflow port communicating with the flow path, and moves toward the valve seat side to form an inflow port communicating with the flow path. a slide pipe capable of closing the inflow port when the end surface abuts the valve seat; and a slide pipe provided on the outer peripheral surface of the slide pipe to move the slide pipe toward the valve seat when fluid pressure is applied. A valve device comprising: a pressure receiving section that generates a force for moving the slide pipe; and a drive means for moving the slide pipe towards and away from a valve seat. 2. The valve device according to claim 1, wherein the tip end edge of the inflow port of the slide pipe has a cross-sectional shape of a curved or flat surface in contact with the valve seat.