CN202394807U

CN202394807U - Double-cavity and double-membrane interlocking differential pressure switch

Info

Publication number: CN202394807U
Application number: CN201120579544XU
Authority: CN
Inventors: 刘为敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-27
Filing date: 2011-12-27
Publication date: 2012-08-22
Anticipated expiration: 2021-12-27

Abstract

The utility model discloses a double-cavity and double-membrane interlocking differential pressure switch, being characterized in that a right shell, a middle shell and a left shell form an A pressure cavity and a B pressure cavity; a membrane and a top tray are respectively arranged in the two pressure cavities; a push rod passes through the middle shell and is interlocked with the top trays in the two pressure cavities, thus preventing the push rod stretching out from the structure which is sealed by a sealing ring outside the shell; a spring is arranged at the front surface of the top tray in the B pressure cavity or the back surface of the top tray in the A pressure cavity; the back surface of the top tray in the A pressure cavity is provided with a transmission sheet and a movable contact; the middle shell is provided with a blade terminal and a fixed contact, thus changing the structure by using the push rod to push a microswitch; therefore, the double-cavity and double-membrane interlocking differential pressure switch is simple in structure and convenient for manufacturing, and has high safety and sensitivity.

Description

The two symphysis dynamic formula pressure difference switches of two-chamber

Technical field:

The utility model relates to a kind of pressure difference switch, a kind of specifically two symphysis dynamic formula pressure difference switches of two-chamber that are applied on gas-heating water heater and the water heater.

Background technology:

In the prior art, gas-heating water heater and water heater mostly adopt the pressure and the discharge of water, control through aqueous vapor interlock valve or water flow sensing unit; These parts have adopted a large amount of copper materials and electronic original part; Manufacturing cost is high, and product structure is complicated, is difficult for grasping; When especially water flows through aqueous vapor interlock valve or water flow sensing unit; Calcium in the water, magnesium plasma can produce in various degree corrosion and influence to parts; Cause the product can't operate as normal; In order to overcome the defective that existing manufacturing technology exists, adopt the pressure differential of pressure difference switch induction water inlet place and water outlet to control, can comparatively ideal replacement aqueous vapor interlock valve or water flow sensing unit; Usually pressure difference switch is barrier film and takes over a business to drive push rod promotion sensitive switch and carry out work, and push rod stretches out the housing outside, is sealed by sealing ring; Barrier film pressure at both sides chamber all is communicated with measured medium; When pressure reduction changed, barrier film issued the morpheme that changes in the promotion of pressure and moves, the compression spring; Promote push rod and take over a business to move to drive the outer sensitive switch of housing, make it to be switched on or switched off; Because sealing ring is in high pressure under work for a long time, receives the erosion of media such as air, water again, can produce agingly, push rod is stuck, moves not freely, loses efficacy and ruptures, and causes interior media to external leakage, and the pressure difference switch cisco unity malfunction.

Summary of the invention: the utility model provides two-chamber two symphysis dynamic formula pressure difference switches in order to overcome the above problems, and it has simple in structure, and reaction speed is fast, low cost of manufacture, the characteristics that antiseptic property is good.

The above-mentioned purpose of the utility model adopts following technical scheme to be achieved: the utility model mainly contains right shell body, middle shell and left shell and forms; It is characterized in that: constitute the A pressure chamber by right shell body and middle shell, constitute the B pressure chamber by left shell and middle shell; In the A pressure chamber, be provided with barrier film and take over a business, barrier film is separated the A pressure chamber; In the B pressure chamber, be provided with barrier film and take over a business, barrier film is separated the B pressure chamber; Push rod pass in middle shell and the A pressure chamber take over a business with the B pressure chamber in take over a business interlock; The back side of taking over a business of taking over a business in front or the A pressure chamber in the B pressure chamber is provided with spring; The A pressure chamber is taken over a business the back side and is provided with conductive sheet, and conductive sheet is provided with moving contact; Middle shell is provided with lug plate, and lug plate is provided with fixed contact.

The utility model compared with present technology, beneficial effect embodies:

1, the utility model constitutes A pressure chamber and B pressure chamber by right shell body, middle shell and left shell; In two pressure chambers, be provided with barrier film and take over a business, push rod passes the interlock of taking over a business in middle shell and two pressure chambers, has avoided push rod to stretch out the structure that housing is sealed by sealing ring outward.

2, the take over a business back side of taking over a business front or A pressure chamber in of the utility model in the B pressure chamber is provided with spring; The A pressure chamber is taken over a business the back side and is provided with conductive sheet and moving contact, and middle shell is provided with lug plate and fixed contact, has changed the structure of utilizing push rod to promote sensitive switch.

3, the utility model is simple in structure, and is easy to make, has fail safe and highly sensitive characteristics.

Description of drawings:

Fig. 1 is the utility model structural representation;

Fig. 2 is another structural representation of the utility model;

Below, the utility model is further described in conjunction with accompanying drawing through embodiment;

Description of reference numerals:

A-right shell body, B-middle shell, C-left shell, 1-A interface, 2-barrier film, 3-take over a business, 4-conductive sheet, 5-A pressure chamber, 6-lug plate, 7-B pressure chamber, 8-spring, 9-adjusting nut, 10-B interface, 11-spring fixed tray, 12-push rod, 13-fixed contact, 14-moving contact;

Embodiment:

Referring to accompanying drawing 1; The utility model mainly contains right shell body (A), middle shell (B) and left shell (C) and forms; Right shell body (A) and middle shell (B) constitute A pressure chamber (5), and left shell (C) and middle shell (B) constitute B pressure chamber (7); In A pressure chamber (5), be provided with barrier film (2) and take over a business (3), barrier film (2) is separated A pressure chamber (5); In B pressure chamber (7), be provided with barrier film (2) and take over a business (3), barrier film (2) is separated B pressure chamber (7); Push rod (12) pass taking over a business in middle shell (B) and the A pressure chamber (5) (3) and B pressure chamber (7) interior take over a business (3) interlock; (3) front of taking over a business in the B pressure chamber (7) is provided with spring fixed tray (11) and spring (8), and look nut (9) is arranged in the B interface (10); A pressure chamber (5) is taken over a business (3) back side and is provided with conductive sheet (4), and conductive sheet (4) is provided with moving contact (14); Middle shell (B) is provided with lug plate (6), and lug plate (6) is provided with fixed contact (13); During use, turn look nut (9) at first, the force value of setting spring (8); The water inlet of A interface (1) with gas-heating water heater or water heater (figure does not draw) connected, and B interface (10) connects with delivery port, opens the water source; Pressure differential can appear in the mouth of a river, two places, the effect of barrier film (2), and move to one side take over a business (3) in the force A pressure chamber (5) of water; Moving contact (14) contacts with fixed contact (13), and conductive sheet (4) is connected moving contact, makes the pressure switch conducting; When the water source when delivery port is closed; Balance appears in pressure; Move take over a business (3) of taking over a business in (3) drive push rods (12) the promotion A pressure chambers (5) that spring (8) promotes in the B pressure chamber (7), and moving contact (14) separates with fixed contact (13), makes pressure switch get into closed condition.

Another embodiment; Referring to accompanying drawing 2; Spring (8) is enclosed within on the push rod (12), and is arranged on the middle part of middle shell (B), push rod (12) one ends connect take over a business (3) in the A pressure chamber (5), and an end connects take over a business (3) in the B pressure chamber (5); When A interface (1) when pressure occurring, take over a business (3) to moving on one side in the A pressure chamber (5), moving contact (14) contacts the pressure switch conducting with fixed contact (13); When pressure balance, move to another side take over a business (3) that spring (8) promotes in the A pressure chamber (5), and moving contact (14) separates with fixed contact (13), makes it to get into closed condition.

Claims

1. the two symphysis dynamic formula pressure difference switches of two-chamber mainly contain right shell body, middle shell and left shell and form; It is characterized in that: constitute the A pressure chamber by right shell body and middle shell, constitute the B pressure chamber by left shell and middle shell; In the A pressure chamber, be provided with barrier film and take over a business, barrier film is separated the A pressure chamber; In the B pressure chamber, be provided with barrier film and take over a business, barrier film is separated the B pressure chamber; Push rod pass in middle shell and the A pressure chamber take over a business with the B pressure chamber in take over a business to be connected.

2. the two symphysis dynamic formula pressure difference switches of two-chamber according to claim 1 is characterized in that: the back side of taking over a business of taking over a business in front or the A pressure chamber in the B pressure chamber is provided with spring.

3. the two symphysis dynamic formula pressure difference switches of two-chamber according to claim 1, it is characterized in that: the A pressure chamber is taken over a business the back side and is provided with conductive sheet, and conductive sheet is provided with moving contact.

4. the two symphysis dynamic formula pressure difference switches of two-chamber according to claim 1, it is characterized in that: middle shell is provided with lug plate, and lug plate is provided with fixed contact.