JP2021177086A - Gas fuel regulator - Google Patents

Abstract

To dispense with the core alignment of a seat member and a valve body after assembling while making an excessive time and labor unnecessary for the assembling, in a gas fuel regulator.SOLUTION: A gas fuel regulator comprises a seat member 1, a valve body 5 having a seat face 12 being an inclined face, and a valve shaft 4 coaxially having the valve body 5, and reciprocating in an axial line direction, and constitutes a pressure regulation mechanism for constantly maintaining the pressure of a pressure regulation chamber 6. The gas fuel regulator sends out gas fuel which is introduced from an introduction port 61 at an upstream side to a send-out port 62 at a downstream side by decompressing and adjusting it. The valve body 5 is attached to the valve shaft 4 in a direction orthogonal to an axial direction and an axial line so as to be movable by a prescribed distance in a semi-fixed state that the valve body 5 is pressed to a valve-closing side of the valve shaft 4 in the axial direction, and a contact face 51 is slidably guided in the axial line direction by withstanding a pressing force in a direction of the valve shaft 4 while abutting on the seat face 12 side by an action of the valve body 5 to the valve-closing side, and an axial core of the valve body 5 and an axial core of the seat member 1 coincide with each other in a valve-closing state.SELECTED DRAWING: Figure 1

Description

The present invention relates to a gas fuel regulator for adjusting a gas fuel to a predetermined pressure and delivering the gas fuel.

Conventionally, a pressure regulating mechanism for a gas fuel regulator is presented, for example, in Japanese Patent No. 3594507. As shown in FIG. 5, this gas fuel regulator has a valve shaft 2a coaxially provided with a valve body 1a having an inclined surface on the tip side and formed in an umbrella shape, and a valve hole 3a in the center. A seat member 5a formed in a donut shape with a seat surface 4a that penetrates and the inclined surfaces of the valve body 1a are brought into close contact with each other and separated from each other, a bottomed cylindrical housing 6a through which the valve shaft 2a is inserted and held, and these. It is provided with a cylindrical body 7a containing the members of the above.

Further, an O-ring 8a is arranged as a sealing means between the seat member disposing surface on the bottom side of the body 7a and the tip end side of the seat member 5a, and the base end surface of the seat member 5a and the tip end of the housing 6a. A flat washer 9a is disposed between the surface, and a plug 10a, which is a plug-shaped fastening member, is disposed in the opening of the body 7a on the base end side of the housing 6a.

The outer diameter of the seat member 5a is smaller than the hole diameter of the body 7a into which the seat member 5a is inserted, and a gap is formed on the outer peripheral side thereof. This allows the seat member 5a to fit into the valve body 1a of the valve shaft 2a set in the housing 6a when assembling the parts. The cores are placed in an adjusted and matched state, and the body 7a is rotated and assembled together with the flat washer 9a, the housing 6a, and the plug 10a. Finally, the fastening force of the plug 10a is used to assemble the housing 6a via the flat washer 9a. The seat member 5a is pressed and fixed to the seat member disposing surface on the bottom side of the body 7a on the tip side.

However, in such a conventional pressure adjusting mechanism for a gas fuel regulator, the seat member 5a is finally completely fixed by the screw fastening force of the plug 10a, so that the valve body 1a is caused by improper assembly or the like. If the seat member 5a is fixed in a misaligned state, the valve body 1a and the seat member 5a may cause non-uniform contact surface and non-uniform opening area, resulting in valve leakage and poor pressure regulation performance. Therefore, it leads to deterioration of yield due to variation between products, and it is easy to cause deterioration of work efficiency because disassembly and reassembly are required due to the occurrence of a defect.

Therefore, in Japanese Patent Application Laid-Open No. 2014-169703, the seat member is provided in a semi-fixed state in which the seat member is slidable in the axial direction instead of being completely fixed, and the valve body in which the inclined surface side is inserted into the valve hole of the seat member is in the valve closing direction. Since the seat member is centered with respect to the valve body by operating in, the gas fuel eliminates the need for strict centering work during assembly and also eliminates the need for centering work after assembly. Although a regulator for gas fuel has been proposed, the regulator for gas fuel presented in this publication is provided in a semi-fixed state in which the seat member is slidable in the axial direction instead of being completely fixed as in Patent No. 3594507. The structure is complicated and it is troublesome to assemble.

Japanese Patent No. 3594507 Japanese Unexamined Patent Publication No. 2014-169703

The present invention is intended to solve the above-mentioned problems, and further, a gas having a pressure adjusting mechanism that does not require core adjustment of a seat member and a valve body after assembly while requiring no labor for assembly. The subject is to provide a regulator for fuel.

The gas fuel regulator of the present invention, which has been made to solve the above problems, has a seat member formed through a valve hole formed in the center and a predetermined pressing means at a predetermined pressing force at all times in the axial direction. A valve shaft that moves to the valve opening side and slides back and forth in the axial direction due to displacement of the diaphragm axially attached to the tip by the gas fuel that is pressed toward the valve closing side and introduced, and a predetermined valve shaft of the valve shaft. It has a valve body having a contact surface consisting of an outer peripheral surface that is widened and inclined toward the base end at the axial position, and has an R-shaped chamfered vertical cross-sectional shape formed at the opening of the valve hole in the seat member. The gas fuel introduced from the upstream side is decompressed and adjusted so that the pressure in the pressure regulating chamber is kept constant while the valve is opened and closed by bringing the contact surface of the valve body into close contact with and separated from the seat surface. In the gas fuel regulator to be delivered, the valve body can be moved by a predetermined distance in the axial direction and the direction perpendicular to the axis to the valve shaft, and is pressed toward the axial valve closing side of the valve shaft in a semi-fixed state. It is mounted, and when the valve body operates toward the valve closing side, the contact surface is in contact with the seat surface side and is slid and guided in the valve axis direction against the pressing force in the valve axis direction. It is characterized in that the shaft core of the valve body and the shaft core of the seat member coincide with each other in the closed state.

Further, in the present invention, the valve body is formed on the distal end side of the cylindrical body on the base end side, and the outer peripheral surface inclined with the same diameter as the cylindrical body is the contact surface. An insertion hole having a shape of a base and a predetermined diameter in the center is formed so as to penetrate in the axial direction, and is formed in an annular shape of a valve body holding member arranged at a predetermined position in the axial direction of the valve shaft. It is characterized in that it is fitted into the groove so as to be movable by a predetermined distance in the axial direction and the direction perpendicular to the axis of the valve shaft, and is mounted in a semi-fixed state pressed on the axial valve closing side of the valve shaft. In this case, the valve body can be mounted in a semi-fixed state in which the valve body can be moved by a predetermined distance in the axial direction and in the direction perpendicular to the axis of the valve shaft and is pressed toward the axial valve closing side of the valve shaft. ..

Further, the annular shape of the valve body holding member is formed by the valve body surrounded by an inner wall surface that is higher than the height of the valve body by a predetermined distance and an outer wall having a height substantially equal to the columnar body of the valve body. While being fitted into the groove, the valve body is locked to the bottom surface whose top surface is located at the same height as the top surface of the outer wall of the locking projection projecting from the valve shaft, and the annular shape. By being pressed in the valve closing direction by an elastic body arranged on the bottom surface of the groove and mounted in a semi-fixed state, the valve body is mounted at a predetermined distance in the axial direction with respect to the valve axis and in the direction perpendicular to the axis. It can be mounted reliably and with a small number of parts.

In addition, the elastic body arranged on the bottom surface of the annular groove has an annular diameter larger than the depth of the annular elastic body installation groove arranged in the annular elastic body installation groove formed on the bottom surface of the annular groove. By using an elastic body, the valve body can be reliably pressed in the valve closing direction with extremely simple components, and the durability is also excellent.

According to the present invention, the valve body operates in the valve closing direction by inserting the contact surface of the valve body into the seat surface having an R-shaped chamfered vertical cross section formed at the opening of the valve hole in the seat member. By aligning the seat member with respect to the valve body, not only does it not require excessive labor for assembly, but also the core adjustment between the seat member and the valve body becomes unnecessary after assembly. By making the valve body side centerable, it is possible to further improve the complexity of the configuration and the ease of assembly to improve productivity and durability.

It is a partial vertical sectional view centering on the pressure regulation mechanism part in the preferable embodiment of the gas fuel regulator of this invention. It is a partial view which enlarged the main part of FIG. It is a partial view which further enlarged the main part of FIG. It is an exploded perspective view of the valve body, the elastic body, and the valve body holding member in the embodiment shown in FIG. It is a partial vertical sectional view which shows the conventional example.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

1 and 3 show a partial longitudinal sectional view centering on a pressure regulating mechanism portion of a preferred embodiment of the gas fuel regulator of the present invention and an enlarged partial view of the main part thereof, which are basic. The structure, action, and effect are the same as those of a well-known gas fuel regulator, and the seat member 1 formed through the valve hole 11 formed in the center and the predetermined pressing means 2 always apply a predetermined pressing pressure. The valve shaft 4 that moves to the valve opening side and slides reciprocally in the axial direction due to the displacement of the diaphragm 3 that is axially attached to the tip due to the gas fuel that is pressed toward the valve closing side in the axial direction and is introduced. A longitudinal section formed in the opening of the valve hole 11 in the seat member 1 is provided with a valve body 5 having a contact surface 51 composed of an outer peripheral surface that is widened and inclined toward the base end at a predetermined axis position of the valve shaft 4. Introduced from the introduction port 61 on the upstream side so as to maintain a constant pressure in the pressure regulating chamber 6 while opening and closing the valve by bringing the contact surface 51 of the valve body 5 into close contact with and separated from the seat surface 12 having an R shape. The gas fuel is depressurized and adjusted, and then sent to the downstream outlet 62.

Then, in the present embodiment, the valve body 5 is movable by a predetermined distance in the axial direction of the valve shaft 4 and the direction perpendicular to the axis, and is pressed toward the axial valve closing side of the valve shaft 4. The feature is that the valve body 5 is mounted in a fixed state, and the contact surface 51 of the valve body 5 is formed in the opening of the valve hole 11 in the seat member 1 by operating the valve body 5 toward the valve closing side. The valve body 4 is in a closed state by being slid and guided in the axial direction against the pressing force in the valve shaft 4 direction while abutting on the seat surface 12 side having an R-shaped chamfered vertical cross section. It is characterized in that the shaft core and the shaft core of the sheet member 1 coincide with each other.

More specifically, in the present embodiment, the valve body 5 is inclined at the same diameter as the cylindrical body 52 on the proximal end side and the cylindrical body 52 integrally formed on the distal end side of the cylindrical body 52. The outer peripheral surface has a shape formed of the truncated cone 53 which is the contact surface 51, and an insertion hole 54 having a predetermined diameter in the center is formed so as to penetrate in the axial direction, and the valve shaft 4 is predetermined in the axial direction. An annular groove 71 formed in the valve body holding member 7 arranged at the position is fitted and inserted into the valve shaft 4 so as to be movable by a predetermined distance in the axial direction and the direction perpendicular to the axis, and the valve shaft is closed in the axial direction. It is mounted in a semi-fixed state pressed to the side.

Then, as shown in FIG. 3, the annular groove 71 formed in the valve body holding member 7 that holds the valve body 5 has a height h2 that is higher than the height h1 of the valve body 5 by a predetermined distance. It is formed by being surrounded by an outer wall 73 having a height h4 substantially equal to the height h3 of the inner side wall 72 and the columnar body 52 of the valve body 5, and the groove width w1 between the inner side wall 72 and the outer wall 73. Is formed to be wider than the cross-sectional width w2 of the inner peripheral surface of the insertion hole 54 of the valve body 5 and the outer peripheral surface 55 of the columnar body 52 by a predetermined width, and the top surface 56 of the valve body 5 is formed. The bottom surface 75 of the annular groove 71 is locked to the bottom surface 81 of the locking projection 8 projecting from the valve shaft 4 and located at the same height as the top surface 74 of the outer wall 73 of the valve body holding member 7. It is pressed in the valve closing direction by the elastic body 9 arranged in the above and is mounted in a semi-fixed state.

In the present embodiment, the elastic body 9 has a diameter larger than the depth of the annular elastic body installation groove 76 arranged in the annular elastic body installation groove 76 formed on the bottom surface 75 of the annular groove 71. For example, by forming an annular elastic body made of elastic resin or elastic rubber, the valve body 5 can always be pressed toward the locking projection 8 projecting from the shaft body 4 in the valve closing direction.

Further, FIG. 4 is an exploded perspective view showing an assembly process of the valve body 5, the elastic body 9, and the valve body holding member 7 in the embodiment shown in FIG. 1.

In the present embodiment having the above configuration, when gas fuel is applied from the introduction port 61 and the diaphragm 3 receives pressure via the valve shaft 4 to which the valve body 5 is mounted and reaches an arbitrary pressure, the valve shaft 4 closes. The valve body 5 slides to the side and comes into contact with the seat surface 12 of the seat member 1 to stop the fuel flow. At this time, in the present embodiment, the seat formed in the opening of the valve hole 11 in the seat member 1. Since the surface 12 has an R-shaped chamfered vertical cross-sectional shape, the load for pulling up the valve shaft 4 can be converted into a load component in the axial direction, and there is an axial deviation between the valve shaft 4 and the seat member 1. When this occurs, only the valve body 5 is pressed against the seat surface 12 and slides in the axial direction in conjunction with the axial movement of the valve body 5 toward the valve closing side, so that the valve body 5 is automatically adjusted. The core can be made possible.

Further, in the present embodiment, not only the number of parts is smaller than that in the conventional example in which the conventional seat member is mounted in a semi-fixed state, but also the assembly is easy, the operation is reliable, and the durability is excellent. It has many advantages to say.

1 Seat member, 2 Pressing means, 3 Diaphragm, 4 Valve shaft, 5 Valve body, 6 Pressure regulating chamber, 7 Valve body holding member, 8 Locking protrusion, 9 Elastic body, 11 Valve hole, 12 Seat surface, 51 Contact surface , 52 Cylindrical, 53 truncated cone, 54 insertion hole, 55 outer surface, 56 top surface, 61 inlet, 62 outlet, 71 annular groove, 72 inner side wall, 73 outer side wall, 74 top surface, 75 bottom surface, 76 ring Elastic body installation groove, 81 bottom surface, h1 valve body 5, h2 inner side wall 72 height, h3 cylinder 52 height, h4 outer side wall 73 height, w1 inner side wall 72 and outer wall 73 Groove width between, cross-sectional width of the inner peripheral surface of the w2 insertion hole 54 and the outer peripheral surface 55 of the cylindrical body 53

Claims (4)

The seat member formed through the valve hole formed in the center and the gas fuel introduced while being constantly pressed toward the valve closing side in the axial direction by a predetermined pressing force with a predetermined pressing force are axially attached to the tip. A contact consisting of a valve shaft that moves to the valve opening side due to displacement of the diaphragm and slides back and forth in the axial direction, and an outer peripheral surface that expands and inclines toward the proximal end side at a predetermined axial position of the valve shaft. The valve body is provided with a surface, and the contact surface of the valve body is brought into close contact with and separated from the seat surface having an R-shaped chamfered vertical cross section formed at the opening of the valve hole in the seat member to open and close the valve. In the gas fuel regulator that decompresses and adjusts the gas fuel introduced from the upstream side and sends it to the downstream side so as to maintain the pressure in the pressure regulation chamber constant while performing the above.
The valve body is mounted in a semi-fixed state in which the valve body can be moved by a predetermined distance in the axial direction and the direction perpendicular to the axis of the valve shaft and is pressed toward the axially closed valve side of the valve shaft. Operates toward the valve closing side, so that the contact surface abuts on the seat surface side and slides and is guided in the axial direction against the pressing force in the valve axis direction. A regulator for gas fuel, characterized in that the shaft core and the shaft core of the seat member match. The valve body is formed of a columnar body on the base end side and a truncated cone whose outer peripheral surface is inclined with the same diameter as the columnar body integrally formed on the tip end side of the columnar body and is the contact surface. An insertion hole having a predetermined diameter in the center is formed so as to penetrate in the axial direction, and the valve shaft has an annular groove formed in a valve body holding member arranged at a predetermined position in the axial direction of the valve shaft. The first aspect of claim 1, wherein the valve shaft is fitted and inserted so as to be movable in a direction perpendicular to the axis direction by a predetermined distance, and is mounted in a semi-fixed state pressed on the axial valve closing side of the valve shaft. Regulator for gas fuel. In the annular groove of the valve body holding member formed by the valve body surrounded by an inner wall surface that is higher than the height of the valve body by a predetermined distance and an outer wall having a height substantially equal to the columnar body of the valve body. While being fitted, the valve body is locked to a bottom surface whose top surface is located at the same height as the top surface of the outer wall of the locking projection projecting from the valve shaft, and the annular groove. The regulator for gas fuel according to claim 2, wherein the regulator is pressed in the valve closing direction by an elastic body arranged on the bottom surface and is mounted in a semi-fixed state. The elastic body arranged on the bottom surface of the annular groove is an annular elastic body having a diameter larger than the depth of the annular elastic body installation groove arranged in the annular elastic body installation groove formed on the bottom surface of the annular groove. The gas fuel regulator according to claim 3, wherein the regulator is provided.

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