a differential pressure switch
A technology of differential pressure switch and switch base, which is applied in the direction of electric switches, electrical components, circuits, etc. It can solve the problems of high manufacturing cost, unstable pressure, and difficult assembly, and achieves wide application range, good working accuracy, and long service life. long effect
Active Publication Date: 2018-10-09
中山市博安泰电器科技有限公司
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Problems solved by technology
However, people have found the following problems after actual use: 1. Because the diaphragm is usually made of rubber, it often causes pressure instability or even water leakage due to rubber aging; 2. Because it uses a micro switch to trigger Therefore, it inevitably brings defects such as complex structure, difficult assembly, high manufacturing cost and large error.
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[0022] The present invention as Figure 1-8 As shown, it includes an overcurrent tube 1, a switch base 2, a movable contact piece 3, a fixed contact piece 4, a trigger lever 5 and a differential pressure diaphragm 6, and the switch base 2 is fixedly connected to the overcurrent tube 1 by rivets. The switch base 2 is hollow (the switch base includes a base with an open top and a top cover, and the ejector rod is detachably connected to the base through four columns), and an overflow groove 20 is provided on the end surface facing the overflow pipe 1 The middle part of the flow pipe 1 is provided with a pressure limiting hole 11, and the side wall of the flow pipe 1 is provided with a trigger hole 12 and a reset hole 13 communicating with the flow tank 20, and the trigger hole 12 and the reset hole 13 Separately located on both sides of the pressure limiting hole 11;
[0023] The differential pressure diaphragm 6 is fixedly connected to the notch of the overflow tank 20 and inc...
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The invention, which relates to the switch element field, provides a novel differential pressure switch having advantages of exquisite structure, high stability, long service life, and good work precision. The novel differential pressure switch comprises an over-current tube, a switch seat, a movable contact piece, a fixed contact piece, a trigger rod and a differential pressure membrane. The switch seat is fixedly connected to the over-current tube. The switch seat is in a hollow-out mode; and an over-current groove is formed in the end surface, facing the over-current tube, of the switch seat. A pressure-limiting hole is formed in the middle of the over-current tube; a trigger hole and a reset hole that are communicated with the over-current groove are formed in the side wall of the over-current tube; and the trigger hole and the reset hole are arranged at the two sides of the pressure-limiting hole. The differential pressure membrane fixedly connected to the groove opening of the over-current groove includes an over-current part and a working part, wherein the two parts are connected into one. The novel differential pressure switch has characteristics of high stability, long service life and high working accuracy.
Description
technical field [0001] The present invention relates to the field of switching elements, in particular to the improvement of differential pressure switches therein. Background technique [0002] The traditional differential pressure switch is composed of two bellows chambers, through the deformation of the diaphragm to finally trigger the uppermost micro switch, so that the electrical signal is output; among them, the representative one is as announced by the National Bureau on June 20, 2012 It is shown in a Chinese invention patent named "micro-pressure differential pressure switch" with application number "201120356399.9". However, people have found the following problems after actual use: 1. Because the diaphragm is usually made of rubber, it often causes pressure instability or even water leakage due to rubber aging; 2. Because it uses a micro switch to trigger , and therefore inevitably brings defects such as complex structure, difficult assembly, high manufacturing co...
Claims
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IPC IPC(8): H01H35/34H01H35/26
CPCH01H35/26H01H35/34
Inventor 张金平
Owner 中山市博安泰电器科技有限公司