Limiting switch motion mechanism of diaphragm valve
A limit switch and action mechanism technology, applied in the direction of diaphragm valves, diaphragms, engine components, etc., can solve the problem that the limit switch action mechanism of the diaphragm valve is not found, and achieve the effect of reducing the adjustment workload
Inactive Publication Date: 2008-12-17
JAPANS ATAYAL NDV VALVE
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[0004] Also do not find the literature that discloses the limit switch action mechanism of this prior art diaphragm valve specifically
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[0072] Below, refer to Figure 1 to Figure 8 The limit switch action mechanism of the diaphragm valve according to the present invention will be described in detail. In addition, in the present embodiment, the so-called directions of up, down, left, and right are merely descriptions of relative positional relationships in the respective drawings, and it goes without saying that they can be changed according to the arrangement and installation angle of the diaphragm valves.
[0073] Such as figure 1 As shown, in the diaphragm valve 1, the piston 4 biased downward in the figure by the coil springs 3, 3a is built in the cylinder 2 in an airtight manner. When working air is injected into the air chamber 5 provided on the lower side of the piston 4 , the piston 4 rises against the urging force of the coil spring 3 . A spindle 7 is mounted on the piston 4 . The mandrel 7 forms a valve shaft, and is reciprocated in the vertical direction shown in the figure by the action of the p...
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The invention provides a diaphragm valve limit switch actuating gear arranged on the diaphragm valve (1) which comprises a mandrel (7) and a diaphragm (8), wherein, the mandrel (7) provides a piston (4) in a cylinder (2) and reciprocates via the piston, and the diaphragm (8) is installed on the front end of the mandrel and is used for opening or closing a passage (13) by means of the reciprocating of the mandrel. The limit switch actuating gear includes: a drive part (24) which is disposed on the mandrel or an extension part of the mandrel and reciprocates along the travel direction of the mandrel; a driven part (32) which is disposed outside the cylinder, is clamped with the drive part on at least one position or two positions nearby a full open position and a full close position of the diaphragm valve, and reciprocates along the travel direction of the mandrel; a cam (40) arranged on the driven part and reciprocating along the travel direction of the mandrel; and a limit switch (50, 60) working by means of the cam. According to the invention, workload due to the adjustment of the limit switch can be greatly reduced.
Description
technical field [0001] The present invention relates to an operating mechanism for operating a limit switch of a diaphragm valve opened and closed by a diaphragm. Background technique [0002] The piston reciprocating in the cylinder under the pressure of fluid such as air or spring force, moves the diaphragm made of elastic material such as rubber through the spindle mounted on the piston and the compressor mounted on the spindle, This opens and closes the diaphragm valve. In order to detect the opening and closing state of the diaphragm valve electrically, a limit switch linked with the reciprocating motion of the mandrel is arranged. [0003] The limit switch action mechanism of the prior art diaphragm valve, such as Figure 9 and Figure 10 As shown, the connecting rod 103 forming the sliding mechanism is pivotally supported on the shaft 102 connected to the upper part of the mandrel 101 in a freely swingable manner. Receiving the movement of the link 103, the switch ...
Claims
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IPC IPC(8): F16K7/17
Inventor 饭田美徳三谷崇
Owner JAPANS ATAYAL NDV VALVE