JPH0517635Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an improvement of a valve for acupressure device used when measuring the internal pressure of a marine diesel engine, etc.

(Prior Art) Generally, in large ships, engine conditions are periodically checked and recorded during voyage, and in this case, a shiatsu pressure gauge valve is installed.

By the way, when the acupressure device valve is opened when the acupressure device is actually operated to measure the internal pressure of the engine, that is, the combustion gas pressure in the cylinder, while the engine is running, high-temperature, high-pressure combustion gas flows through the valve. When the valve temperature rises and the flow of combustion gas is stopped after the valve is closed, the temperature will slowly drop. In terms of the valve structure, the valve seat between the gas inlet hole and the gas outlet hole, that is, the tip valve seat, is provided on the gas outlet hole side, and the tip valve of the valve stem is tightened against this to close the self-locking function. The present applicant has proposed a valve for acupressure device having the following characteristics.

As mentioned above, in a shiatsu instrument valve that has a structure in which the tip valve seat is provided on the gas outlet side and the tip valve of the valve stem is tightened and closed, the tip valve is formed integrally with the valve stem rather than the diameter of the valve seat. The outer diameter of the valve is inevitably large, and in combination with the valve stem and the tip valve seat provided on the valve housing side, the valve housing has an open structure on the gas introduction hole side, and the valve stem is inserted from here, and it is opened after the valve stem is inserted. The structure is such that the part is closed with a screw lid.

(Problem to be solved by the invention) However, as mentioned above, an opening is provided on the gas introduction hole side of the valve housing for inserting the valve stem, and a screw cover is attached to this opening (screwing). However, since a portion of this screw cap is in direct contact with high temperature, high pressure combustion gas from the engine cylinder within the valve housing and repeatedly expands and contracts due to temperature changes, there is a problem in terms of maintaining airtightness.

This idea was created in view of the above points, and it eliminates the screw cap that is directly affected by the high temperature and high pressure combustion gas mentioned above, and has excellent maintainability, allowing easy replacement of parts that wear out over time. The purpose of the present invention is to provide a valve for acupressure device.

(Means for solving the problem) The gist of this invention to solve the above object is that a valve stem having a leading valve and a middle valve moves in the axial direction within the valve housing, and the leading valve moves in the axial direction within the valve housing. A valve for a shiatsu instrument in which a middle valve selectively opens and closes between a gas introduction hole and a gas discharge hole, respectively, includes a valve housing, and a female valve provided on the upper half circumferential wall of the valve housing. A tip valve seat is provided in a step between the bottomed circular hole with a threaded part and the hollow hole that penetrates the body, and the valve stem is inserted into the bottom of the circular hole, and the tip valve seat of the valve stem is inserted into the tip valve seat. A tip valve seat corresponding to the seat, and a middle valve seat on the upper edge of the middle hole that penetrates the body,
The middle valve seat body is inserted into the valve stem and screwed into the circular hole to hold down the tip valve seat body, and the intermediate valve seat body is inserted into the valve stem and fixed, and the surface formed at the lower end corresponds to the middle valve seat. The valve stem is rotatably screwed into the center of the annular valve body.
The valve for an acupressure instrument is characterized by comprising a valve stem guide member screwed and fixed to the end of the circular hole.

(Function) In this design, the valve stem, front valve seat body, middle valve seat body, and middle valve body are assembled outside the valve housing, and these are assembled into the bottomed circular hole provided in the valve housing. The high-temperature, high-pressure combustion gas from the engine cylinder flows through the valve, and all functional parts that are directly affected by it are sealed inside the valve housing, which is excellent in terms of airtightness.
In addition, the middle valve body is made separate from the valve stem, and the tip valve seat body and middle valve seat body are also made separate from the valve housing.
These functional parts can be easily replaced due to wear and tear over time, and have excellent maintainability.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

The drawing is a longitudinal sectional view showing an embodiment of this invention.

In the figure, 1 is a valve housing, which is provided with a circular hole 2 with a bottom that opens upward, and a gas introduction hole 3 at the bottom of the circular hole.
A gas outlet hole 4 is formed in the side wall of the circular hole, and a female screw portion 5 is formed in the upper half wall of the circular hole.

Reference numeral 6 denotes a cylindrical tip valve seat body that is fitted into the circular hole 2 of the valve housing 1. A tip valve seat 7 is stepped in the middle of the hole passing through the body, and a tip valve seat 7 is provided above the valve seat 7. A communication hole 8 is provided to connect the gas inlet hole 3 and the gas outlet hole 4 of the valve housing 1.
communicate.

Reference numeral 9 denotes a cylindrical middle valve seat body which is screwed into the circular hole 2 of the valve housing 1 and presses down the tip valve seat body 6, and a middle valve seat 10 is attached to the upper edge of the middle valve passing through the body. A male screw portion 11 is provided on the outer periphery to be screwed into the female screw portion 5 of the circular hole 2, and a locking portion 12 for rotation operation is recessed in the upper end portion.

Reference numeral 13 denotes a valve stem, which has a tip valve 14, a constricted portion 15, a sliding portion 16, a male screw portion 17, and a shank portion 18 sequentially provided from its lower end, and the tip valve seat body 6 is inserted into the shank portion 18. The tip valve 14 is placed on the tip valve seat 7.
corresponds, and the shank portion 18 is placed above the valve seat body 6.
Insert the middle valve seat body 9 into the middle hole and insert the sliding part 16 into the middle hole.
are in sliding contact.

Reference numeral 19 denotes an annular intermediate valve body which is fitted and fixed onto the valve stem 13, and has a surface 20 formed at its lower end.
A pin 21 is inserted between the sliding part 16 and the male screw part 17 of No. 3.
The valve seat 20 corresponds to the middle valve seat 10 of the middle valve seat body 9 inserted into the valve stem 13.

Reference numeral 22 denotes a valve stem guide body which is screwed and fixed to the end of the valve housing 1, and has a male threaded part 23 on its outer periphery that is threaded into the female threaded part 5 of the circular hole 2, and a lower part thereof with respect to the middle hole passing through the center. A large-diameter portion 24 that allows movement of the middle valve seat body 9 from above, a female screw portion 25 on the upper wall thereof, a gas vent hole 26 communicating with the outside world, and a sliding surface 27 of the shank portion 18 of the valve stem 13 are sequentially provided. ing.

The valve for acupressure device of this invention is assembled by the following procedure.

The tip valve seat body 6 is inserted into the valve stem 13 from the shank portion 18 side thereof.

Similarly, the shank portion 18 of the valve stem 13
Insert the middle valve seat body 9 from the side.

The middle valve body 19 is inserted into the valve stem 13 on the middle valve seat body 9 and fixed to the valve stem 13 with the pin 21.

Insert the tip of the valve stem 13 of both the front valve seat body 6 and the middle valve seat body 9 into the circular hole 2 of the valve housing 1, and by screwing into the circular hole 2 of the middle valve seat body 9, the front valve seat body 6 into the inner bottom of the circular hole 2.

The shank portion 18 of the valve stem 13 is passed through the inner hole of the valve stem guide 22, and the valve stem guide 22 is screwed and fixed to the circular hole 2 of the valve housing 1, and the valve stem is inserted into the valve stem guide 22. 13.

An operating handle 28 is attached to the shank portion 18 of the valve stem 13 that protrudes from the valve stem guide 22.

The thus assembled valve has a circular hole 2 in the valve housing 1.
Inside, the tip valve 14 of the valve stem 13 touches the tip valve seat body 6.
Corresponding to the pilot valve seat 7, the gas introduction hole 3 and the pilot valve seat 7
The gas inlet hole 3 is connected to the gas outlet hole 4 through the constricted portion 15 of the valve stem 13 and the communication hole 8, and the gas introduction hole 3 is connected to a communication groove hole (not shown) provided in the sliding portion 16 of the valve stem 13, and a middle valve. Inner valve seat 10 of seat body 9 and valve stem 1
It communicates with the gas vent hole 26 of the valve stem guide 22 through a communication slot (not shown) provided in the male threaded portion 17 of No. 3.

In the above configuration, when the valve stem 13 is moved forward and backward by rotating the valve stem 13 with the operating handle 28, the valve stem 13 is moved forward and backward, and the space between the gas introduction hole 3 and the gas outlet hole 4, and between the gas introduction hole 3 and the gas vent hole 26 is changed. are selectively opened and closed.

For example, as shown in the figure, the tip valve 14 of the valve stem 13 is joined to the tip valve seat 7 of the tip valve seat body 6, and the gas introduction hole 3
When the operating handle 28 is rotated from the state where the gas flow between the gas outlet hole 4 and the gas outlet hole 4 is cut off, the valve stem 13
When the pilot valve 14 moves into the valve housing, the pilot valve 14 separates from the pilot valve seat 7, and the gas from the gas introduction hole 3 passes through the gas outlet hole 4 and acts on the acupressure instrument, thereby measuring the engine internal pressure.

During this valve opening operation, the gas introduction hole 3 temporarily communicates with the gas vent hole 26 within an extremely short rotation operation time until the pilot valve 14 is fully opened, and the gas trapped in various parts inside the valve housing is released to the atmosphere. do. However, as soon as the contact between the surface 20 of the middle valve body 19 and the middle valve seat 10, that is, the valve opening operation is finished, the release of this gas to the atmosphere stops immediately.

(Effects) Since this invention is configured as described above, it has the following effects.

(1) Although the structure is designed to shut off high-temperature, high-pressure combustion gas from the engine cylinder by tightening the tip valve of the valve stem against the tip valve seat body on the valve housing side, the valve stem is inserted into the valve housing. Since no opening is formed on the side of the gas introduction hole, there is no need for a screw lid to close the opening as seen in conventional valves, and the valve can be designed rationally in terms of airtightness.

(2) The high-temperature, high-pressure combustion gases from the engine cylinders circulate and all functional parts that are directly exposed to these gases are enclosed within the circular holes of the valve housings, so over time It also has excellent airtightness and high stability.

(3) The functional parts that are directly exposed to high-temperature, high-pressure combustion gas from the engine cylinders are divided into multiple parts and assembled inside the circular hole of the valve housing. It is easy to disassemble and assemble, and it is also easy to replace these parts due to wear and tear over time, providing excellent maintainability.

[Brief explanation of the drawing]

The drawing is a sectional view of this invention. 1...Valve housing, 2...Bottomed circular hole, 3...Gas introduction hole, 4...Gas outlet hole, 5...Female screw portion, 6...
Pilot valve seat body, 7... Pilot valve seat, 8... Communication hole, 9...
Middle valve seat body, 10... Middle valve seat, 11... Male thread part,
12... Locking part for rotation operation, 13... Valve stem, 14
... Lead valve, 15 ... Neck part, 16 ... Sliding part,
17...Male thread part, 18...Shank part, 19...
...Medium valve body, 20...For now, 21...Pin, 22...
...Valve stem guide body, 23...Male thread part, 24...Large diameter part, 25...Female thread part, 26...Gas vent hole, 2
7... Sliding surface, 28... Operating handle.

Claims (1)

[Scope of utility model registration request] A valve stem with a front valve and a middle valve moves in the axial direction within the valve housing, and the front valve selectively moves between the gas introduction hole and the gas exhaust hole, and the middle valve selectively moves between the gas introduction hole and the gas vent hole. A valve for an acupressure device that opens and closes includes a valve casing, a bottomed circular hole provided in the valve casing with a female thread formed in the upper half circumferential wall, and a tip valve seat stepped in the middle part of the hollow hole that penetrates the body. , a tip valve seat body that is inserted into the valve stem and fitted into the bottom of the circular hole, and the tip valve of the valve stem corresponds to the tip valve seat; and a middle valve seat is provided on the upper edge of the hollow hole that penetrates the body; A middle valve seat body that is inserted into the rod and screwed into a circular hole to hold down the tip valve seat body, and an annular shape that is inserted and fixed to the valve stem and has a surface formed at the lower end that corresponds to the middle valve seat. 1. A valve for an acupressure instrument, comprising: a middle valve body forming a central valve body; and a valve stem guide body having a valve stem rotatably screwed into the center thereof and fixedly screwed to the end of the circular hole.