JP2000337544A - Governor valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a governor valve capable of performing always accurate pressure control wherein the valve construction is compacted and the valve element is stabilized. SOLUTION: A recessed installation space 5 is formed in that part of a valve element V mating with a valve stem 4, and in this space 5, a pressure regulating spring 12 is installed whose one end is received and supported by a spring receptacle 11 provided at the tip of a spring pressure adjusting screw 10 and which adjusts the degree of valve opening, and the height (h) of a governor lid 9 is lowered by incorporating the spring 12 in the valve element V, and also the valve construction is compacted and valve element is stabilized by shortening the distance to the seat face 7 from the weighing point of the spring 12 on the valve part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant-pressure governor valve which is provided in a gas flow path or a water supply flow path of a water heater and keeps a downstream pressure constant even when an upstream pressure changes.

[0002]

2. Description of the Related Art Conventional governor valves of this type are, for example,
As shown in FIG. 2, a valve body V 'interlocked with the diaphragm 3', and a pressure regulator for adjusting the degree of valve opening by urging the valve body V 'through the diaphragm 3' in the valve opening direction. Spring 12 '
The pressure regulating spring 12 'is mounted on the governor cover 9' and mounted to move the valve body V 'to and away from the valve seat surface 7' in response to a change in upstream pressure (for example, gas pressure). By doing so, the pressure on the downstream side is controlled to be constant. In the figure, reference numeral 11 'denotes a spring receiver and 10' denotes a spring pressure adjusting screw.

[0003]

However, in such a governor valve, since the pressure regulating spring 12 'is mounted and mounted on the governor lid 9', there are the following problems. 1. Pressure adjusting spring 1 at the upper center of governor lid 9 '
Upwardly extending tubular portion 8 'for mounting and mounting 2'
From the height h 'of the governor lid 9'.
And the governor valve needs to take up much space in the flow path configuration. 2. In addition, since the governor valve has a cylindrical portion 8 'extending upward in the center upper portion, the height h' is high in the production of the governor valve. 3. Further, since there is a considerable distance between the weight of the pressure adjusting spring 12 'on the valve portion and the valve seat surface 7', the base end of the valve shaft 4 'is fixedly mounted on the diaphragm 3'. Since the body V 'is suspended, the valve body V' is inclined when the valve body V 'moves forward and backward, so that there is no stability in the contact / separation relationship between the valve body V' and the valve seat surface 7 '. However, there was a problem that accurate pressure control was not always possible. In particular, this problem has been prominent in a governor mounting posture in which the valve shaft 4 'is horizontal.

[0004] The governor valve of the present invention solves the above problems,
An object of the present invention is to provide a governor valve which solves the above-mentioned problems of the conventional governor valve by incorporating a pressure adjusting spring in the valve body.

[0005]

A governor valve according to a first aspect of the present invention for solving the above-mentioned problems is provided in a flow passage so that the downstream pressure is constant even if the upstream pressure changes. In the governor valve which is automatically controlled, a gating spring for adjusting a valve opening degree is incorporated in a valve body of the governor valve.

According to a second aspect of the present invention, there is provided a governor valve according to the first aspect, wherein the pressure regulating spring for adjusting the degree of opening of the valve body is coaxial with the valve shaft. The main point is that a concave mounting space is provided in which the mounting space can be maintained.

In the governor valve according to the first aspect of the present invention having the above structure, a pressure regulating spring for adjusting the degree of valve opening is incorporated in the valve body of the governor valve. The valve itself can be made compact, and processing of the governor lid can be facilitated. Further, as the distance between the weight of the pressure adjusting spring applied to the valve portion and the valve seat surface is reduced, the valve body is less likely to fall down, and the valve body can be stabilized. As a result, for example, accurate pressure control can be performed even in a governor mounting posture in which the valve shaft is horizontal.

The governor valve according to the second aspect of the present invention having the above-mentioned structure is characterized in that a pressure regulating spring for adjusting the degree of valve opening is incorporated in the valve body, and the pressure regulating spring is provided on the valve body with the same axis as the valve shaft. Therefore, the governor valve according to the first aspect of the present invention can be easily realized with a simple and easy-to-manufacture structure.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of a governor valve of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an example of a governor valve according to the present invention. In FIG. 1, a central portion of a diaphragm 3 stretched so that a fluid pressure acts on a valve chamber 2 formed in a flow path 1 is shown. A concave mounting space 5 having the same axis as the valve shaft 4 is formed in a portion corresponding to the valve shaft 4 of the valve body V, and a base end of the valve body V integrally provided with a valve portion 6 is formed at a distal end. The valve body V and the diaphragm 3 cooperate with each other so that the valve portion 6 comes into contact with and separates from the valve seat surface 7.

On the opposite side of the valve body V, there is provided a governor cover 9 having a low cylindrical portion 8 at the center, and a screw 10 for adjusting spring pressure is screwed at the center of the cylindrical portion 8 of the governor cover 9. A valve opening having a preset spring pressure between a spring receiver 11 fixedly provided only in the axial direction at the tip of the spring pressure adjusting screw 10 and the bottom of the mounting space 5 of the valve body V. The pressure adjusting spring 12 for adjusting the degree is mounted with a slight preload applied, and the integral diaphragm 3 and the valve element V are opposed to the pressure adjusting spring 12 depending on the magnitude of the flow pressure or by the spring pressure of the pressure adjusting spring 12. It is configured to move forward and backward.

When the valve body V is attached to the diaphragm 3, the annular convex portion 3a at the center of the diaphragm 3 is attached to the valve shaft 4
Are fitted in an annular concave portion 4a provided at the base end of the diaphragm 3 and fixed by a retaining ring 14 in a state where the central portion of the diaphragm 3 is clamped and held by the fitted portion and the pressing plate 13 to form an airtight state. It is integrated into.

In the above configuration, the pressure adjusting spring 12 for adjusting the degree of valve opening is provided in the concave mounting space 5 formed in the valve body V.
Is mounted, the height h of the governor cover 9 is reduced, and the governor valve itself can be made compact.
Can also be easily processed. Also, as the distance between the weight of the pressure adjusting spring 12 applied to the valve portion 6 and the valve seat surface 7 becomes shorter,
The valve body V is less likely to fall, and the valve body V can be stabilized. Therefore, for example, accurate pressure control can be performed even in a governor mounting posture in which the valve shaft 4 is horizontal. In the drawing, a indicates the flow direction of the lower inflow type, and b indicates the flow direction of the upper inflow type.

FIG. 3 shows an example of a use state in which the governor valve of the present invention is provided in a gas flow path of a mixing-type water heater, in which a governor valve is provided from a gas inlet 15 to an electromagnetic safety valve MV,
Hydraulic automatic gas valve V _1, the plug fitting V _2, upstream 1 equipped between the electromagnetic safety valve MV hydraulically automatic gas valve V ₁ in the gas passage 1 reaches the gas burner 16 via a capacity switching valve V ₃
Even if the gas pressure of a changes, the gas pressure of the downstream side 1b is automatically controlled so as to be constant.

[0015] Incidentally, in FIG. 3, B is hydraulically actuated device, provided on the upstream side of the water supply path 17 to work with the constant flow valve V ₄ and the hydraulic automatic gas valve V _1, the downstream YuAtsushi water and is plumbed to allow for the water supply and the mixer 19 through the control valve V ₅ to the heat exchanger 18.
Further, M in a single motor for driving the electromagnetic safety valve MV, the plug fitting V _2, etc., by operating the operation button 20, so as ignition and hot water and the extinguishing and tapping stop is performed by the motor driving ing.

Although an example of the embodiment of the present invention has been described above, the present invention is not limited to the embodiment and can be implemented in various modes without departing from the gist of the present invention. Of course.
For example, in the present embodiment, a governor valve is provided in the gas flow path to control the gas pressure.However, it may be used as a water governor in the water supply flow path to control the water supply pressure. In addition, it is not limited to a water heater.

[0017]

As described above, according to the governor valve of the present invention, the pressure adjusting spring for adjusting the degree of valve opening is mounted in the concave mounting space formed in the valve body. As a result, the governor valve itself can be made compact and the production and processing of the governor lid can be facilitated. Also,
As the distance between the weight of the pressure adjusting spring applied to the valve portion and the valve seat surface is reduced, the valve body is less likely to fall down, and the valve body can be stabilized. Therefore, accurate pressure control can always be performed regardless of the governor mounting posture such that the valve shaft is horizontal.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a governor valve of the present invention.

FIG. 2 is a sectional view showing a conventional governor valve.

FIG. 3 is a developed configuration diagram showing an example of a use state of the governor valve of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Flow path V ... Valve element 4 ... Valve shaft 5 ... Mounting space 12 ... Pressure regulating spring

Claims (2)

[Claims] 1. A governor valve provided in a flow passage for automatically controlling a downstream pressure to be constant even when an upstream pressure changes, wherein a degree of opening of the governor valve is adjusted in a valve body of the governor valve. A governor valve characterized by incorporating a pressure adjusting spring. 2. The governor valve according to claim 1, wherein a pressure adjusting spring for adjusting the degree of opening of the valve body has a concave mounting space in which the pressure adjusting spring can be mounted while maintaining the same axis as the valve shaft.