JPH0331903Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a valve that is attached to a fluid piping to open/close a flow path and adjust the degree of opening, and particularly relates to a valve equipped with a structure for detecting the life of the valve. .

There are many different types of valves. Although they are used for a variety of purposes, especially those used for medical purposes, nuclear power plants, chemical plants, etc., if a failure should occur, it would cause serious accidents and losses.

Prior Art Conventionally, valve maintenance has been performed regularly and strictly. In other words, at predetermined intervals, such as once a year or once every six months, equipment and various plants were shut down and valves were overhauled and repaired. In addition, for valves that would have a particularly large impact in the event of a failure, a counter to count the number of operations and an hour meter to total the energization time were installed separately, and these were used to determine maintenance timing and lifespan. .

Problems that the present invention aims to solve In this case, regular maintenance involves maintenance of valves that are used infrequently and therefore have a low probability of failure, resulting in wasted maintenance costs. There were problems in that maintenance costs increased, and installing a counter and hour meter separately from the valve required new electrical wiring, which increased equipment costs.

Therefore, the technical problem of the present invention is to obtain a valve with a simple life detection structure.

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problems is to form a large number of vertical grooves in the axial direction on the operating member that rotates the valve body. A life detection member made of a material that wears more easily than the groove is biased in the direction of the longitudinal groove by an elastic member.

Effect The operation of the above technical means is as follows.

When opening/closing or adjusting the degree of opening of the valve body,
The operating member is rotated. The tip of the life detection member is urged by an elastic member and pressed against the vertical groove of the operating member. The life detection member is made of a material that wears more easily than the vertical grooves of the operating member.
Abrasion occurs when the operating member rotates. The more times the valve is operated, the more the amount of wear increases, and the shorter the life of the valve. Therefore, by checking the amount of wear on the life detection member, the number of times the valve is operated, that is, the lifespan, can be easily detected. can.

Effect of invention The present invention produces the following specific effects.

The present invention has a simple structure and can detect the lifespan of each valve, and based on the above detection, only valves that require maintenance can be maintained. Furthermore, by manufacturing it integrally with the valve, it can be manufactured at low cost and new equipment costs are not required.

Embodiment An embodiment illustrating a specific example of the above technical means will be described (see FIG. 1).

The valve casing is formed by a body 1 and an end piece 3 which is threadedly connected to the body 1. Inlet 4 to main body 1 and end member 3
An outlet 5 and a valve chamber 6 are provided to form a fluid passage.

A valve body 7 is rotatably arranged within the valve chamber 6. A through hole 8 and a guide hole 9 are formed perpendicularly to each other in the valve body 7, and a parallel keyway 10 is provided above the guide hole 9.

Annular valve seats 11, 1 are provided on the inlet side and outlet 5 side of the valve body 7.
Place 2. Both valve seats 11 and 12 are liner 13,
The valve element 7 is urged in the direction of the valve body 7 by disc springs 15 and 16 via the valve body 14 . O-ring 1 on the outer periphery of both valve seats 11 and 12
Place 7 and 18.

A bearing hole 19 and a holding hole 22 are formed in the main body 1, and a valve shaft 21 is placed in the holding hole 22 via a bush 23.

The valve stem 21 is prevented from popping out by a holder 26 screwed to the valve casing. A gland seat 29 is arranged from the outer periphery to the lower surface of the flange 28 formed on the valve shaft 21, and biased toward the flange 28 by a liner 30 and disc springs 31, 32 arranged on the lower surface. Packings 34 and 35 are arranged on the upper surface of the flange 28 and the outer periphery of the valve shaft 21.

The upper end of the valve shaft 21 is connected to an operation source 33 such as a motor.
The output shaft 25 is connected to the output shaft 25 via a connecting rod 24.
The connecting rod 24 is made of stainless steel and serves as an operating member. Heat dissipation fins are formed on the upper and lower outer peripheries of the connecting rod 24, and a large number of knurled vertical grooves 50 are formed in the center.

A connecting member 36 that connects the main body 1 and the operation source section 33
A horizontal hole 51 is provided at a position opposite to the vertical groove 50, and a life detection member 52 is inserted into the horizontal hole 51. A spring 53 is arranged at the outer end of the life detection member 52 and held by a holder 54. The inner end of the life detection member 52 is urged by a spring 53 and pressed against the vertical groove 50. The life detection member 52 is made of carbon and has a scale 55 on its surface.

A brush 57 is attached to the lower surface of the connecting member 36 with a snap spring 56.

When the output shaft 25 is rotated, the connecting rod 24 and the valve shaft 21 are rotated, and the valve body 7 is opened and closed. The life detection member 52 is biased by a spring 53, and its inner end is pressed against the vertical groove 50 of the connecting rod 24. Since the life detection member 52 is made of carbon and wears more easily than the vertical groove 50 made of stainless steel, it is scraped and worn by the vertical groove 50 when the connecting rod 24 rotates.
The amount of wear on the life detection member 52 can be confirmed by looking at the scale 55. As the amount of wear on the life detection member 52 increases, the biasing force of the spring 53 gradually weakens, so the width of the scale is displayed gradually narrower. The brush 57 is used to clean the scraped powder from the life detection member 52.

In this embodiment, the operation source unit 3 such as a motor
Although an automatic valve with 3 is shown, it can also be used with a manual valve. Although carbon is used for the life detection member, Teflon or the like may also be used. Although the connecting rod is used as the operating member, a valve shaft, an output shaft, or the like may also be used as the operating member.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a valve equipped with a life detection structure according to an embodiment of the present invention. 1: Main body, 3: End member, 4: Inlet, 5: Outlet,
6: Valve chamber, 7: Valve body, 8: Through hole, 11: Inlet annular valve seat, 12: Outlet annular valve seat, 19: Bearing hole, 2
1: Valve stem, 24: Connecting rod, 25: Output shaft, 36:
Connecting member, 50 Vertical groove, 52: Life detection member, 5
3: Spring.

Claims (1)

[Scope of utility model registration request] A large number of vertical grooves are formed in the axial direction on the operating member that rotates the valve body, and a life detection member made of a material that wears more easily than the vertical grooves is biased in the vertical groove direction by an elastic member. , a valve with a life detection structure.