CN2831400Y

CN2831400Y - Pressure predictor

Info

Publication number: CN2831400Y
Application number: CN 200520097781
Authority: CN
Inventors: 刘纪福
Original assignee: CHAOYANG ELECTRONIC PRODUCTS Manufacturing Co Ltd WUHAN
Current assignee: CHAOYANG ELECTRONIC PRODUCTS Manufacturing Co Ltd WUHAN
Priority date: 2005-08-24
Filing date: 2005-08-24
Publication date: 2006-10-25
Anticipated expiration: 2015-08-24

Abstract

The utility model discloses a pressure predictor which comprises an external connection casing and a leading-out terminal connected with the external connection casing, wherein a dry reed pipe, a magnet body, and a diaphragm are arranged in an inner cavity between the external connection casing and the leading-out terminal. Interstices are left among the magnet body, the diaphragm and the dry reed pipe. The magnet body and the diaphragm are in contact with a resetting device. The utility model has small and simple structure, convenient installation and good reliability, can measure positive pressure, negative pressure and differential pressure, and can be extensively used for predicting and controlling the pressure of gas or liquid. The typical applications of the utility model are a blockage alarm of an air filtering device of an automobile and an oil pressure alarm of an automobile engine. The utility model has novel structure and small appearance through reasonable design, the service life of a switch of the utility model is longer than the service life of products with a traditional structure, and the trouble in use and installation is reduced.

Description

Pressure advance notice device

Technical field

The utility model belongs to gas and fluid pressure switching technique field, especially adopts the pressure switch of tongue tube as the folding element.

Background technology

At present, the air negative pressure inductive switch that tradition is used (empty stifled) adopts a caulking gum diaphragm is set in a plastic housing alms bowl, plastic casing inside is separated into two parts, a part communicates with air filter through flexible pipe, another part has been equipped with the reed and the rubber diaphragm interlock of on-off action, the two sides of rubber diaphragm is supported by spring, and when negative pressure produced, diaphragm can drive reed and produce the mobile switch motion that makes.This air negative pressure inductive switch volume is big, and heatproof, loss of properties on aging need to be connected with air filter with flexible pipe, need add bracing frame simultaneously and fix, be difficult for installing connecting, and poor reliability, useful life is short.

Existing gas and fluid pressure switch, mostly finish the structure of opening and closing movement by device action promotion contact or sensitive switch, because the influence of contact part manufacturing process, the folding that causes contact and sensitive switch is not very reliable, and this causes the failure rate of such pressure switch higher.

Summary of the invention

The utility model provides a kind of magnetic red formula pressure sensitive advance notice switch of small volume structure compactness, to address the above problem.

The technical solution of the utility model is: magnetic red formula air negative pressure inductive switch, it comprises the outer housing that connects, and is connected the leading-out terminal that housing connects with outer, connects outward in the inner chamber between housing and the leading-out terminal to be provided with tongue tube, magnetic and diaphragm, gapped between magnetic and diaphragm and the tongue tube; Magnetic and diaphragm contact with pressure reset device.

The utility model, structure is small and exquisite simple, easy for installation, good reliability, can measure malleation, negative pressure and differential pressure, can be widely used in the pressure advance notice and the control of gas or liquid, it is that air filter for automobile stops up alarm and automobile engine engine oil pressure alarm that the typical case uses.By rational design, make novel structure of the present utility model, profile small and exquisite, switch life reduces and uses the trouble of installing far above the product of traditional structure.

Description of drawings

Fig. 1 magnetic red formula air negative pressure induction advance notice construction of switch schematic diagram

Fig. 2 magnetic red formula air positive pressure induction advance notice construction of switch schematic diagram

Fig. 3 tongue tube off-centre is provided with figure

Three of Fig. 4 leading-out terminals are drawn the joint pin schematic diagram

Embodiment

As shown in Figure 1, magnetic red formula air negative pressure induction advance notice switch comprises the outer housing 1 that connects, and establishes external screw thread on it, can be connected with air filter by external screw thread.Housing 1 upper end is connected with leading-out terminal 8.Be provided with tongue tube 7 in the outer inner chamber that connects between housing 1 and the leading-out terminal 8; Establish jacking block 4 in the outer inner chamber that connects between housing 1 and the leading-out terminal 8, magnetic adopts magnet ring 5 to be located in the jacking block 4, and diaphragm 6 is located on the jacking block 4.Between magnet ring 5 and diaphragm 6 and the tongue tube 7 gapped 10.Be provided with between diaphragm 6 and the tongue tube 7 and adjust packing ring 13.The placement direction of tongue tube 7 can with the axis normal of housing 1 and/or magnetic magnet ring 5 or parallel; Present embodiment adopts vertical the setting, and the dotted line of tongue tube does not overlap promptly eccentric the setting with the housing axis.Tongue tube also can be with horizontal plane angle at ± 60 ° with interior setting.As shown in Figure 3.Jacking block 4 is divided into pressure reset spring 3; It also comprises pressure-regulating device, pressure-regulating device is that to be located in the housing 1 be adjusting bolt or the adjustment screw 9 that pressure reset spring 3 contact with pressure reset device, establishes pad 2 between adjusting bolt or adjustment screw 9 and the pressure reset spring 3.Establish air vent hole 11 on the leading-out terminal 8.Establish three in the leading-out terminal 11 and draw joint pin 12, as shown in Figure 4, be respectively sound, light warning.

The operation principle of this device is: when air filter stops up the generation of generation negative pressure, diaphragm 6 promotes jacking block 4 compression springs 3 and makes the magnet ring 5 and the distance of tongue tube 7 change (increase) when reaching certain distance, tongue tube 7 adhesives of tending to act of the magnetic force of magnet ring 5, tongue tube 7 adhesive signals are exported through lead terminal.For improving accuracy, establish set screw 9 in the spring lower end, in order to regulate given force value.

As shown in Figure 2, it is a malleation warning schematic diagram, and its structure and negative pressure warning fundamental form are same, just the pressure reset spring of establishing on jacking block 4 15.If institute's measuring pressure is little, pressure reset spring 3 can not wanted.

Claims

1, a kind of pressure advance notice device, it comprises the outer housing that connects, and with the outer leading-out terminal that is connected the housing connection, it is characterized in that being provided with tongue tube in the outer inner chamber that connects between housing and the leading-out terminal, magnetic and diaphragm, gapped between magnetic and diaphragm and the tongue tube; Magnetic and diaphragm contact with pressure reset device.

2, pressure is predicted device according to claim 1, it is characterized in that described dried magnetic is a magnet ring.

3, pressure is predicted device as claimed in claim 1 or 2, it is characterized in that the axis normal setting of tongue tube and housing and/or magnetic magnet ring, and the dotted line of tongue tube does not overlap with the housing axis.

4, pressure advance notice device as claimed in claim 1 or 2, it is characterized in that tongue tube and horizontal plane angle at ± 60 ° with interior setting.

5, pressure is predicted device according to claim 1, it is characterized in that establishing jacking block in the outer inner chamber that connects between housing and the leading-out terminal, and magnetic is located in the jacking block, and diaphragm is located on the jacking block.

6, as pressure advance notice device as described in the claim 5, it is characterized in that pressure reset device is the pressure reset spring that is located under the jacking block.

7, as pressure advance notice device as described in the claim 5, it is characterized in that resetting means is the pressure reset spring that is located on the jacking block.

8, pressure is predicted device according to claim 1, it is characterized in that it also comprises pressure-regulating device, pressure-regulating device is that to be located in the housing be adjusting bolt or the adjustment screw that pressure reset spring contact with resetting means, establishes pad between adjusting bolt or adjustment screw and the pressure reset spring.

9, pressure is predicted device according to claim 1, it is characterized in that being provided with between diaphragm and the tongue tube adjustment pad.

10, pressure is predicted device according to claim 1, it is characterized in that establishing air vent hole on the leading-out terminal, establishes three in the leading-out terminal and draws joint pin.