Kabushiki Kaisha Kawasaki Precision Machinery

Kawasaki Jukogyo Kabushiki Kaisha

Kawasaki Jukogyo Kaisha Kabusiha

Seiji Ishii

Makoto Ninomiya

Kaoru Nomichi

Yutaka Suzuki

Yuko Funakubo

Takeo Kozuki

Yasuji Kanou

Hiroshi Aoshiba

Masaki Kawahigashi

A resin sub-seal member () provided with a concave groove () is disposed at a region closer to a higher-pressure side region than a rubber main seal member () and pressure variation in a gas on a higher-pressure side is inhibited from being transmitted to the main seal member (). Further, a variation reducing space () is formed between the seal members () and () to be able to reduce the pressure variation when gas leakage in the sub-seal member () occurs or the sub-seal member () responds with a delay with respect to the pressure variation. Thus, rapid change in the pressure of the gas surrounding the main seal member () is inhibited, occurrence of the blistering phenomenon is inhibited, and a high seal ability is achieved. The seal structure is formed by a simple structure including the seal members () and (), and the variation reducing space ().

Gas seal structure

Electric power is supplied to a coil () to drive a valve () for displacement by a magnetic action, thereby adjusting the opening of a valve path (). The electric power for thus driving the valve () is supplied to the coil () through an electric conductor wire (). The electric conductor wire () extends from a portion of a housing () that is exposed from a tank () to a portion of the housing () that accommodates the coil () therein. Thus, the housing () holds the electric conductor wire () as extending inside the housing (). Since the electric conductor wire () is thus held as extending inside the housing (), the electric conductor wire () is protected against vibration and impact given thereto from the outside. Thus, the electric conductor wire () has enhanced reliability in terms of resistance to vibration and impact. With the electric conductor wire () thus positioned within the housing (), the housing () can house the electric conductor wire () neatly. Thus, the present invention can provide a highly reliable electromagnetic valve device which can be reduced in size and simplified in structure.

Solenoid valve device

Under emergency, a valve body displaced from a closed position to an open position in association with melting of a fuse member receives resultant of pressing forces of a primary pressure of gas guided through a primary port in an opening direction in a state where the valve body is disposed at the position closer to the open position including a fluid driving start position between the closed position and the open position. The valve body receives smaller resultant of the pressing forces of the primary pressure in the opening direction in a state where the valve body is disposed at the position closer to the closed position than to the fluid driving start position than the resultant of the pressing forces received by the valve body in the state where the valve body is disposed at the position closer to the open position including the fluid driving start position.

Relief valve device

A pressure-reducing valve includes a housing, a pressure-reducing piston, a driving piston, and a spring mechanism. The housing is provided with a primary port and a secondary port. The pressure-reducing piston is displaceably retained in an interior of the housing. The pressure-reducing piston is displaced to control an opening degree of the primary port and configured to separate the interior of the housing into a primary-pressure space connected to the primary port and a secondary-pressure space connected to the secondary port. The driving piston is displaceably retained in the interior of the housing. The driving piston is displaced to cause the pressure-reducing piston to be displaced in association therewith and has a secondary-pressure receiving surface that receives a secondary pressure from a fluid in the secondary-pressure space. The spring mechanism is configured to exert a spring force against the secondary pressure to at least one of the pistons.

Pressure-reducing valve

A plunger () and a piston () are displaceably held in a housing () for opening and closing a valve path () defined in the housing (), and a single common seat block () provided for the plunger () and the piston () is fixed to the housing () and has seat portions () each formed from a soft material for respective of the plunger () and the piston () to be pressed thereon. This arrangement provides a valve device which is simplified in structure and can be manufactured with reduced man-hour.

Growing community of inventors

Ono, Japan

Seiji Ishii