Pressure switch capable of accurately controlling on-off value

Abstract

The invention discloses a pressure switch capable of accurately controlling an on-off value, relates to the technical field of pressure control elements, and solves the technical problems that an existing pressure switch is low in on-off value adjusting precision and poor in adaptability, and the pressure switch is composed of a belleville spring, a terminal A, a terminal B, a push rod and a gland. Through reasonable design of the single-piece force value and the superposition number of the belleville springs, accurate regulation and control of the on-off value are realized. When the pressure reaches a set threshold value, the push rod overcomes the counter-acting force of the belleville spring to push the microswitch to be switched on, when the pressure is lower than the threshold value, the belleville spring drives the push rod to reset to enable the microswitch to be switched off, the structure is simple, control precision is high, and the on-off pressure value can be flexibly adjusted according to actual requirements.

Description

Technical Field

[0001] This invention relates to the field of pressure control element technology, and specifically to a pressure switch that precisely controls the on / off value. Background Technology

[0002] Pressure switches are widely used in industrial production, hydraulic systems, and other fields to automatically switch circuits on and off based on pressure changes. Existing pressure switches typically adjust their on / off values ​​using a single spring structure, which suffers from low adjustment accuracy and poor flexibility in adapting to different pressure requirements, making it difficult to meet the demands of high-precision equipment. Therefore, there is an urgent need for a pressure switch with a simple structure, precise on / off value control, and flexible adjustment capabilities. Summary of the Invention

[0003] The purpose of this invention is to provide a pressure switch that precisely controls the on / off value, so as to solve the technical problems of low on / off value adjustment accuracy and poor adaptability of existing pressure switches.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A pressure switch for precise on / off control comprises a butterfly spring (1), terminal A (2), terminal B (3), push rod (4), and pressure cap (5). The push rod (4) elastically abuts against the butterfly spring (1), and terminals A (2) and B (3) are electrically connected to a micro switch. The on / off control of the circuit is achieved by the displacement of the push rod (4).

[0006] The working principle of this pressure switch is as follows: When pressure is applied in the direction indicated by the arrow, the push rod (4) is pushed as the pressure increases. The push rod (4) moves to the right while continuously counteracting the reaction force of the butterfly spring (1). When the pressure reaches the set threshold, the push rod (4) moves to the top and pushes the micro switch to turn on, so that terminal A (2) and terminal B (3) form a circuit. When the pressure is lower than the set threshold, the push rod (4) moves to the left under the elastic force of the butterfly spring (1), causing the micro switch to turn off, so that terminal A (2) and terminal B (3) form an open circuit.

[0007] This invention achieves precise control of the on / off value by rationally designing the parameters of the disc springs: when the disc springs are designed with a deformation of 0.3 mm and a force of 280 N, and nine disc springs are stacked together, the on / off value of the pressure switch is 2.0 MPa; when the disc springs are deformed with a deformation of 0.3 mm and a force of 320 N, and nine disc springs are stacked together, the on / off value is 3.0 MPa. Users can flexibly set the on / off threshold of the pressure switch by adjusting the force of each disc spring and the number of disc springs stacked, according to actual needs.

[0008] The beneficial effect of this invention is that by designing and stacking the parameters of the disc springs, it achieves precise control of the on / off value of the pressure switch, solving the problems of low adjustment accuracy and poor adaptability of existing products; the force value and stacking quantity of the disc springs can be flexibly adjusted according to the pressure requirements of different scenarios, with a wide range of adaptability and strong practicality. Attached Figure Description

[0009] Figure 1 This is a structural diagram of a pressure switch that precisely controls the on / off value. Detailed Implementation

[0010] A pressure switch for precise control of on / off values ​​includes a butterfly spring (1), terminal A (2), terminal B (3), push rod (4), and pressure cap (5); the push rod (4) elastically abuts against the butterfly spring (1), and the terminal A (2) and terminal B (3) are electrically connected to a micro switch respectively, and the on / off state is controlled by the displacement of the push rod (4); when the pressure is applied in a set direction, the push rod (4) is pushed to counteract the reaction force of the butterfly spring (1) and move to the right; when the pressure reaches the set threshold, the push rod (4) pushes the micro switch to turn on, so that the terminal A (2) and terminal B (3) form a circuit;

[0011] The butterfly spring (1) is set in a multi-piece stacking manner. The force value of a single butterfly spring when it is deformed by 0.3 and the number of stacked pieces together determine the on / off threshold of the pressure switch. When the force value of a single butterfly spring when it is deformed by 0.3 is 280N, the on / off threshold of the pressure switch is 2.0MPa when 9 pieces are stacked. When the force value of a single butterfly spring when it is deformed by 0.3 is 320N, the on / off threshold of the pressure switch is 3.0MPa when 9 pieces are stacked.

[0012] like Figure 1 As shown, the working principle of a pressure switch that precisely controls the on / off value is as follows: When the pressure is increased in the direction indicated by the arrow, the push rod (4) is pushed as the pressure increases. The push rod (4) moves to the right while continuously counteracting the reaction force of the butterfly spring (1). When the pressure reaches the set threshold, the push rod (4) moves to the top and pushes the micro switch to turn on, so that terminal A (2) and terminal B (3) form a circuit. When the pressure is lower than the set threshold, the push rod (4) moves to the left under the elastic force of the butterfly spring (1), causing the micro switch to turn off, so that terminal A (2) and terminal B (3) form an open circuit.

Claims

1. A pressure switch for precisely controlling on / off values, characterized in that, It includes a butterfly spring (1), terminal A (2), terminal B (3), push rod (4), and pressure cap (5); the push rod (4) elastically abuts against the butterfly spring (1), and the terminal A (2) and terminal B (3) are electrically connected to the micro switch respectively, and the on / off state is controlled by the displacement of the push rod (4); when the pressure is applied in the set direction, the push rod (4) is pushed to counteract the reaction force of the butterfly spring (1) and move to the right. When the pressure reaches the set threshold, the push rod (4) pushes the micro switch to turn on, so that the terminal A (2) and terminal B (3) form a passage.

2. The pressure switch for precisely controlling on / off values ​​according to claim 1, characterized in that, The butterfly spring (1) is set in a multi-piece stacking manner. The force value of a single butterfly spring when it is deformed by 0.3 and the number of stacked pieces together determine the on / off threshold of the pressure switch. When the force value of a single butterfly spring when it is deformed by 0.3 is 280N, the on / off threshold of the pressure switch is 2.0MPa when 9 pieces are stacked.

3. A pressure switch for precisely controlling on / off values ​​according to claim 2, characterized in that, When a single disc spring deforms by 0.3, the force is 320N. When nine disc springs are stacked, the on / off threshold of the pressure switch is 3.0MPa.

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