Magnetic-gas position detection device

Abstract

The invention discloses a magnetic-gas position detection device. The magnetic-gas position detection device comprises a main body, an upper cover, a valve body, a diaphragm, a magnetic sheet, a valve element, a spring seat, a telescopic spring, a first containing cavity, a second containing cavity, a first through hole, a third containing cavity, second through holes, a fourth containing cavity, an exhaust opening, a gas supply opening, a signal opening, a valve hole, a magnetic ring and an annular groove, wherein the bottom of the main body is fixedly connected with the outer wall of an air cylinder, the outer edge of the top of the main body is fixedly connected with the outer edge of the bottom of the upper cover, the inner edge of the bottom of the upper cover makes contact with the outer edge of the top of the valve body, and the outer edge of the bottom of the valve body makes contact with the outer edge of the top of the diaphragm. According to the magnetic-gas position detection device, by detecting strong magnetic signals of the magnetic ring arranged on a piston, converting the strong magnetic signals into air pressure signals and outputting the air pressure signals, the motion position of the air cylinder is detected, no electric power is needed, limiting conditions are few, the applicability is high, the magnetic-gas position detection device can be applied to special occasions with anti-explosion requirements and the like, the structure is simple, detection is accurate, and the cost of a pneumatic system is low.

Description

technical field [0001] The invention relates to the technical field of position detection devices, in particular to a magnetic-gas position detection device. Background technique [0002] A cylinder is an actuator that converts compressed air energy into mechanical energy output in a pneumatic transmission system. It is generally composed of a cylinder barrel, an end cover, a piston, a piston rod, and a seal. It is usually necessary to detect the position of the piston rod during use. At present, there are mainly two types of traditional position detection methods: one is to install a magnetic switch on the cylinder barrel and a magnetic ring on the piston. When the cylinder moves, the piston drives the strong magnetic magnetic ring to move together. When the magnetic ring moves to When the magnetic switch is in position, the magnetic force of the magnetic ring acts on the reed switch of the magnetic switch, and the contacts of the reed switch are turned on or off, and then ...

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Problems solved by technology

[0003] However, the former pneumatic system has a simple structure, accurate detection, and low cost of the pneumatic system, while the latter has a complex structure and high system cost, and sometimes the installation position of the pneumatic travel valve or electrical proximity switch is limited, which brings inconvenience to the cylinder position detection

Therefore, the cylinder position detection device utilizing the magnetic switch is the most widely used, and has met most of people's needs, but there are still some deficiencies, mainly the following problems: First, the electrical signal must be used to cooperate with the electrical control system to complete the cylinder position. There are certain restrictions on detection. Second, it is inconvenient to use electrical control in places with explosion-proof requirements. The applicability is poor, and it is difficult to meet the needs of special scenarios. Significantly increases the cost of the entire pneumatic system

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