JPH0229328Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the improvement of valves installed in various pipes such as water pipes.

[Conventional technology]

Conventionally, as shown in FIG.
The screwed shaft c reciprocates in the axial direction by rotating a handle d pivotally attached to its outer end, and moves the valve body e pivotally connected to its inner end into the flow path f in the body a. The flow path f is moved forward and backward relative to the valve seat g formed between the valve body e and the valve seat g, and the flow path f is opened by moving the corresponding tapered surfaces e' and g' of the valve body e and the valve seat g into and out of contact with each other.
or, as shown in Fig. 4, an elastic gasket h is fixed to the valve body e.
It is known that the opening and closing are performed by moving the gasket h and the valve seat g apart.

[Problem that the invention attempts to solve]

However, in the former valve shown in Fig. 3, if there is even a slight error in the accuracy of the angles of both the tapered surfaces e' and g' of the valve body a and the valve seat g, it is difficult to completely shut off the fluid in the flow path f. , and the latter valve in Fig. 4 is
The seal may be damaged due to foreign matter getting caught or over tightening.
The problem is that it is easy to cause damage.

The present invention was devised in view of these problems, and its purpose is to provide a structure with excellent durability and sealing performance when the valve is closed.

[Means for solving problems]

In order to achieve the above object, the valve of the present invention is provided with a cylindrical protrusion that protrudes toward the space on the inflow path side of the valve seat on the periphery of the through hole in the valve seat in the body. The valve body that moves into and out of contact with the valve seat is connected to a highly rigid disk that is inserted into a retainer that is attached to the body and is pivotally connected to the inner end of the shaft that reciprocates in the axial direction when the handle is rotated. and a lip seal made of an elastic material, which is fixed to the disk and has a lip portion that fits tightly onto the outer peripheral surface of the cylindrical projection when the valve is closed.

[Effect]

That is, in the above-described valve, when the valve body is operated in the valve closing direction by rotating the handle,
As the operation progresses, the lip seal, which is a constituent member of the valve body, is fitted onto the cylindrical projection of the valve seat, and the lip portion comes into close contact with the outer peripheral surface of the cylindrical projection, preventing the flow of fluid from the inflow path. will be blocked.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

First, FIG. 1 shows a first embodiment, in which reference numeral 1 denotes a body provided with an inlet passage 4 and an outlet passage 5 that communicate with each other via a through hole 3 of a valve seat 2, and 6 a cylinder portion 7 of the body 1. A retainer 8 is hermetically fitted with a handle 9 which is hermetically inserted and screwed into the shaft hole of the retainer 6 and is pivoted to its outer end 8b.
10 is a valve seat 2 inside the body 1;
The valve body is inserted into the space 11 on the side of the inflow passage 4 and is connected to the inner end 8a of the shaft 8. The space 1 is located around the periphery of the through hole 3 in the valve seat 2.
A cylindrical protrusion 12 protruding toward the first side is provided around the periphery.
Further, the valve body 10 includes a highly rigid disk 13 such as metal, which is pivotally connected to the inner end 8a of the shaft 8, and is integrally fixed to the outer periphery of the disk 13 by baking or the like, and is attached to the outer periphery of the cylindrical projection 12. The lip seal 14 is made of a rubber-like elastic material and has an annular lip portion 15 extending toward the lip seal 12'. Reference numeral 16 denotes a stopper that protrudes into the through hole 3 and restricts the stroke limit of the valve body 10 (disc 13) in the valve closing direction.

The valve of this embodiment has the above configuration, and the handle 9
When the valve body 10 is operated in the valve closing direction by the rotation operation, the lip portion 15 at the tip of the lip seal 14
As the operation progresses, the cylindrical projection 12 of the valve seat 2 gradually approaches the cylindrical projection 12, and eventually fits onto the outer peripheral surface 12' of the projection 12 and closes the through hole 3, and at this point Then, the disk 13 comes into contact with the tip of the stopper 16, and the valve closing operation is completed. In the valve closed state, the lip portion 15 is reliably brought into close contact with the outer peripheral surface 12' of the cylindrical projection 12 by the pressure of the fluid from the inflow channel 4 side, and this contact force is applied to the screw of the shaft 8. It is not obtained by propulsion load (tightening force).

Next, FIG. 2 shows another embodiment, and the difference from the first embodiment is that the cylindrical projection 12 and the disk 13 are each formed with tapered surfaces 17 and 18 that come into close contact with each other when the valve is closed. In other words, the flow rate is restricted in the parts 17 and 18 to perform a rough seal, and the lip part 15 and the outer circumferential surface 12' of the cylindrical projection 12 are brought into close contact to perform a precise seal. , in this case, the tapered surface 1
7 and 18 also function as a stopper for the valve body 10.

[Effect of idea]

As described above, the valve of the present invention has a lip seal in the valve body that is opened and closed by the rotation of the handle, and when the valve is closed, the lip seal is fitted onto the cylindrical projection provided on the periphery of the hole in the valve seat. The structure is designed to close the flow path (hole) by closing the valve, which not only improves the sealing performance when closing the valve, but also prevents foreign objects from getting caught or the seal surface (lip part) from being damaged by over-tightening the handle (shaft). It has excellent effects such as no damage and dramatically improved durability.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention;
FIG. 2 is a vertical sectional view of the main part showing another embodiment,
FIG. 3 is a longitudinal sectional view showing one example of a conventional structure, and FIG. 4 is a longitudinal sectional view of a main part showing another conventional structure. DESCRIPTION OF SYMBOLS 1...Body, 2...Valve seat, 3...Through hole, 4...Inflow path, 5...Outflow path, 6...Retainer, 7...Cylinder section, 8...Shaft, 8a...
...Inner end, 8b...Outer end, 9...Handle, 1
0... Valve body, 11... Space, 12... Cylindrical projection,
12'...Outer peripheral surface, 13...Disk, 14...
Lip seal, 15... lip portion, 16... stopper, 17, 18... tapered surface.

Claims (1)

[Scope of utility model registration request] A cylindrical protrusion 12 is provided at the periphery of the through hole 3 in the valve seat 2 in the body 1 to protrude toward the space 11 on the inflow path 4 side of the valve seat 2. A rigid shaft 8, which is inserted into a retainer 6 mounted on the body 1 and pivoted to an inner end 8a of a shaft 8, moves back and forth in the axial direction when the handle 9 is rotated. a large disk 13; a lip portion 1 which is fixed to the disk 13 and fits tightly onto the outer circumferential surface 12' of the cylindrical projection 12 when the valve is closed;
5. A valve comprising a lip seal 14 made of an elastic material.