JPH01275974A - Valve device - Google Patents

Abstract

PURPOSE:To keep off any deflection attendant upon valve on-off operation as well as to make a valve perform its accurate on-off operation by forming plural pieces of valve seats on a plate surface of a valve seat at regular intervals along the peripheral edge. CONSTITUTION:Plural pieces of concave-form valve seats 13 corresponding to an almost spherical surface are formed on a plate surface of a valve seat 14 at regular intervals along the peripheral edge. Each spherical valve body 15 being set up in these valve seats 13 is pressed to a valve seat ring 13 by a valve housing 17 via a spring (unillustrated herein). When valve on-off operation takes place, it is carried out by opening or closing of these multiple valve bodies 15, so that the moving width is little, therefore any deflection in each valve body 15 becomes hard to occur.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a valve device that can prevent swinging of a valve body during opening and closing and can perform reliable opening and closing operations.

b. Prior Art As is well known, various valves are used as means for restricting or controlling fluid flow.

FIGS. 8 and 9 show a valve device used in a plunger pump known as a high-pressure pump.

This valve device is composed of a cylindrical valve seat 100, a valve body 102 having a flange 101 projecting around its periphery, and a valve housing 103 that presses the valve body 102 toward the valve seat 100.

Plunger pumps are sometimes used, for example, to pump cement clinker, so in conventional valve devices, as the valve body 102 opens and closes, fluid is contained between the valve body 102 and the valve seat 100. Solid objects, etc., may become trapped.

Valve seat 100 used in a conventional valve device
Since it is a cylindrical body, it is easy for solid objects to pass through it, and since the valve seat 100 and the valve body 102 are made of metal, if a solid object is caught between the valve seat 100 and the valve body 102, the valve mounting surface will be damaged. The opening and closing operations may not be performed reliably. For this reason, it is no longer possible to pump a certain amount of fluid at regular intervals, resulting in a decrease in work efficiency due to the use of the pump. In addition, solid matter caught between the valve seat 100 and the valve body 102 may cause damage to the valve seat 100 or the valve body 102.
02 had the disadvantage that fluid leaked from the cracks. Therefore, conventionally, the valve device had to be replaced at that point, resulting in interruption of work.

Therefore, we invented a valve device that can prevent solids from flowing into the fluid and improve its durability (Japanese Patent Application No. 1982-237996).

This valve device has a valve seat 104 formed in a concave shape corresponding to a substantially spherical surface, and a predetermined number of fluid passages 106 opening into the concave surface 105, which corresponds to the concave shape of the valve seat 107. a valve body 108 having opposing surfaces;
The valve cover 110 and the spring retainer 111 are held on the concave surface 105 of the valve seat 107 via the valve housing 109, and at least one of the valve seat 107 and the valve body 108 is molded or made of a hard elastic material. coating or
One side is molded from a hard elastic material, and the other side is covered with a hard elastic material. Also, instead of a hard elastic material, it may be made of wood.

According to this valve device, since the fluid passage 106 formed in the valve seat 107 is narrow, it is difficult for solid matter to pass through the valve seat 107.
Even if solid matter is caught between the valve seat 107 and the valve body 108, the valve seat 107 and/or the valve body 108 will
Since it has elasticity, even if solid matter is present, it will not interfere with the opening and closing of the valve.

C1 Problems to be Solved by the Invention However, according to the above-mentioned prior art, when the pump's pumping amount becomes large, the valve body 108 tends to shake when fluid flows in, and it is not sufficient to perform pumping at a higher pressure. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a valve device that solves the above problems, prevents vibrations caused by opening and closing, and can withstand use at ultra-high pressures.

d. Means for Solving the Problems The present invention forms concave valve seats corresponding to a substantially spherical surface at regular intervals along the periphery on the plate surface of the valve seat, and extends through the valve seat into these valve seats. a plurality of fluid passages formed in the valve seat, a valve body having a spherical surface corresponding to the valve seat surface is disposed on each valve seat of the valve seat, and elastic means 18 for elastically pressing the valve bodies against the valve seat surface; There is provided a valve device characterized in that a valve housing is provided.

e. Example Hereinafter, an example of the present invention will be described in detail with reference to a concave surface.

FIG. 1 is a cross-sectional view showing an embodiment that is used as an ultra-high pressure pump as a fluid pumping device used for pumping cement or the like.

This ultra-high pressure pump 1 includes a valve box 3 provided with a valve chamber 2, a plunger box 5 provided with a plunger 4,
It is comprised of a valve box 3 and a box 7 having a pressure action chamber 6 disposed between the valve box 3 and the plunger box 5.

The valve box 3 has an inlet valve 10 and an outlet valve 1 in an inlet passage 8 and an outlet passage 9 communicating with the valve chamber 2, respectively.
1 is provided.

As shown in FIGS. 2 to 7, the inlet-side valve 10 and the outlet-side valve 11 have a plurality of concave valve seats 13 corresponding to a substantially spherical surface on a plate surface 12 at regular intervals along the periphery (
a spherical valve body 15 disposed on each valve seat 13; and a valve housing 17 that presses the valve body 15 against the surface of the valve seat 13 via a spring 16. It consists of

In the valve seat 14, a plurality of fluid passages 18 (in the illustrated example, three fluid passages 18 each) are formed on the surface of each valve seat 13, and the fluid passages 18 penetrate in the axial direction of the valve seat 14.

On the other hand, a passage 19 for passing fluid through the valve housing 17 is provided along its circumference in correspondence with the valve seat 13 of the valve seat 14, and the valve body 15 is loosely inserted into this passage 19. The passage 19 has a small diameter on the outflow side and is provided with a step 20, and one end of a spring 16 that presses the valve body 15 is engaged with the step 20.

The valve housing 17 and the valve seat 14 have bolt holes 21 and 22 formed through their centers, respectively, and are fastened with bolts 23 and nuts 24.

The material of the valve body 15 and the valve seat 14 is not only metal, but also one or both of them may be made of a hard elastic material.
For example, it may be molded from a synthetic resin material or may be coated with a synthetic resin material.

A passage 26 communicating between the pressure chamber 6 and the inside of the valve seat 2 is bored in the side wall 25 of the valve box 3, and at the open end of the passage 26 on the pressure chamber 6 side, a certain amount of particles A sorter 27 such as a mesh is provided to prevent particles larger than the diameter from entering.

The plunger box 5 has a plunger 4 built into the cylinder 28 via a banking 29, and reciprocates the plunger +4 projecting into the pressure chamber 6 via a drive mechanism (not shown).

The pressure action chamber 6 includes a cylinder 28 side A and a valve chamber 2 side B.
An elastic membrane 30 is stretched to partition the cylinder, and the cylinder side A of the elastic membrane 30 is filled with a working medium 31 such as oil.

In addition, there is a difference in specific gravity between the valve chamber of the pressure action chamber 6 and the fluid.
In addition, the pressurized fluid may be prevented from directly flowing into the pressure action chamber 6 by filling it with a liquid such as oil that does not mix with water.

Next, according to the above configuration, when the elastic membrane 30 contracts due to the suction operation of the plunger 4, the volume of the pressure application chamber 6 on the cylinder side A is reduced. As a result, the inlet side valve 10
The valve body 15 opens the valve against the spring 16, and a fluid 32 such as a cement mill is introduced into the valve chamber 2. At this time, the valve body 15 of the outlet side valve 11 remains closed because it is attracted in the closing direction. The fluid 32 flows into the valve chamber 2 after the fluid 32 excludes particles having a certain diameter or more through the fluid passage 18, and furthermore, the particles having a certain diameter or more are excluded by the mesh of the separator 27.

Next, the elastic membrane 30 is expanded by the pushing operation of the plunger 4, and the fluid 32 introduced into the valve chamber 2 is transferred to the outlet side valve 1.
The zero-person side valve 10 and the outlet side valve 11, which open and pressure feed the valve 1, open and close the valves by opening and closing a large number of valve bodies 15, so their movement range is small, and therefore No vibration etc. occurs.

r. Effects of the Invention As described above, the valve device of the present invention can prevent the swinging of the valve body due to opening/closing operations, so it can be used in fluid pumping devices such as ultra-high pressure pumps to ensure more reliable operation. Opening/closing operations can be performed. Therefore, the durability can be further improved compared to the conventional one.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention applied to an ultra-high pressure pump, FIG. 2 is a sectional view showing an embodiment of the pulp apparatus of the present invention, and FIG. 3 is the valve device of FIG. 2. FIG. 4 is a plan view showing the valve housing of FIG. 3, FIG. 5 is a sectional view taken along line A-A of FIG. 4, and FIG.
A plan view showing the valve seat in the figure, Figure 7 is A- in Figure 6.
A sectional view taken along line A and FIGS. 8 to 11 show a conventional valve device, FIGS. 8 and 10 are sectional views, and FIGS. 9 and 11 are perspective views. 10... Inlet side valve, 11... Outlet side valve, 13... Valve seat, 14... Valve seat, 15...
・Valve body, 16... Spring, 17... Valve housing, 18.19... Fluid passage, 23...
bolt. Figure 4 Figure 6 Figure 10 Figure 11

Claims (1)

[Claims] On the plate surface of the valve seat, concave valve seats corresponding to a substantially spherical surface are formed at regular intervals along the periphery, and a plurality of fluid passages passing through the valve seat are formed in these valve seats. A valve body having a spherical surface corresponding to the valve seat surface is disposed on each valve seat, and a valve housing is provided with an elastic means for elastically pressing the valve bodies against the valve seat surface. Valve device.