Partial rotary valve limiting protection mechanism
A valve limit and protection mechanism technology, applied to valve devices, mechanical equipment, engine components, etc., can solve problems such as valves cannot be opened or closed normally, affect system operation safety, lose control, etc., and achieve the function of increasing valve limit protection , easy to install, low cost effect
Pending Publication Date: 2021-03-23
DALIAN MARINE VALVE
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Problems solved by technology
The problem with the single opening and closing control method is: when the travel switch of the actuator module fails to work normally, the actuator module loses control of the valve position, and the valve cannot be opened or closed normally, which directly affects the operation of the system. Safety
Method used
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Embodiment Construction
[0013] The present invention will be further described below in conjunction with accompanying drawing:
[0014] Such as figure 1 , 2 , 3, and 4, a partial rotary valve limit protection mechanism provided by the present invention is composed of a positioning ring 1, a rotary disc 2 and an indicator rod 3 for indicating that the valve is in the open or closed position. The ring hole of the positioning ring is a non-complete hole, see figure 2 , the inner wall of the ring hole is provided with a radially protruding boss 6, the boss is located within the two sidelines 17, 18 of the 90-degree central angle of the positioning ring, and the distance from the two ends of the boss to the sideline is the same. There are two radial through-holes 14,15 on the positioning ring, and the two radial through-holes are arranged on the two sidelines 17,18 of the 90-degree central angle of the positioning ring, that is, the centerlines of the two radial through-holes They coincide with the tw...
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The invention relates to a partial rotary valve limiting protection mechanism. The partial rotary valve limiting protection mechanism comprises a positioning ring and a rotary disc, and is characterized in that a boss is arranged on the inner wall of the hole of the positioning ring; the boss is located in the range of two side lines of a 90-degree central angle of the positioning ring; two radialthrough holes are arranged in the positioning ring; the two radial through holes are arranged in the two side lines of the 90-degree central angle of the positioning ring separately; telescopic indicating rods used for indicating that the valve is located at the opening position and the closing position are arranged in the two radial through holes separately; the rotary disc is located in the positioning ring and concentric with the positioning ring; a notch is arranged on the outer edge of the rotary disc in the circumferential direction; the boss of the positioning ring is located in the notch space; the rotation angle of the rotary disc is larger than 90 degrees; and a lag contact gap A is arranged between the notch end face of the rotary disc and the end face of the positioning circular ring boss. The partial rotary valve limiting protection mechanism has the following characteristics: the valve limiting protection function is added, safe and reliable operation of the system is guaranteed, starting of mechanical limiting protection lags behind limiting control of an actuator module, and therefore normal work of the valve cannot be affected, the opening and closing positions ofthe valve can be visually displayed, and the partial rotary valve limiting protection mechanism is simple and compact in structure and easy to install.
Description
technical field [0001] The invention relates to a position limiting mechanism for a valve, in particular to a position limiting protection mechanism for a partial rotary valve. Background technique [0002] Existing partial rotary valves, such as ball valves, butterfly valves, plug valves, etc., are mainly composed of two parts: a valve module and an actuator module. The rotation angle of the part-turn valve is usually 90 degrees. The opening and closing of the valve are controlled by the travel switch of the actuator module, and the valve stem rotates within the range of 90 degrees. The problem with the single opening and closing control method is: when the travel switch of the actuator module fails to work normally, the actuator module loses control of the valve position, and the valve cannot be opened or closed normally, which directly affects the operation of the system. Safety. Contents of the invention [0003] The purpose of the present invention is to provide a p...
Claims
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IPC IPC(8): F16K37/00
CPCF16K37/0008
Inventor 周雪李海锋王守真孙春强闫超高斌王原胜李丹
Owner DALIAN MARINE VALVE