CN208637362U - A kind of blast switch - Google Patents

Abstract

The utility model discloses a kind of blast switch, including pedestal, lid, the diaphragm unit being set between base and cover body, diaphragm unit constitutes the positive pressure chamber and negative pressure cavity of sealing with lid and pedestal respectively, diaphragm unit includes diaphragm support, diaphragm support is equipped with mandril, the periphery of diaphragm support is provided with ring film, pedestal, lid flange holding ring shape diaphragm edge；Public terminal, normally opened terminal and normally closed terminal are respectively equipped on pedestal, mandril links elastic slice component towards the movement of the direction of pedestal to be electrically connected normally opened terminal；Offer at least one through hole on diaphragm support, ring film be equipped with take shape in inside the through hole and with the integrally formed connecting column of ring film；The above blast switch forms ring film on the diaphragm support for being equipped with through hole, guarantees the air-tightness and structural stability of diaphragm unit, to guarantee the accuracy of the measurement function of blast switch.

Description

A kind of blast switch

Technical field

The utility model relates to switching technique field more particularly to a kind of blast switch.

Background technique

In gas heater combustion process, the various exhaust gas such as a large amount of carbon dioxide and carbon monoxide can be generated, these are useless Outdoor must be discharged by blower in gas, just can guarantee using safe.In order to monitor whether blower works normally, usually pacify in blower Blast switch is arranged in holding position, and blast switch on-off signal passes to controller, when controller detects that blower work is abnormal Control whole system stops working, water heater no longer working displacement exhaust gas, prevents room air contaminated, or even influence the life of people Life safety.

Blast switch is usually to be made of components such as lid, pedestal, diaphragm unit, elastic slice component and microswitches, diaphragm The chamber that lid and pedestal are constituted is divided into positive pressure chamber and negative pressure cavity by component, and the positive pressure chamber and negative pressure cavity of blast switch lead to respectively Cross lid, the ventilation pipe on pedestal connect with the external world, diaphragm unit needs good air-tightness ability accurate response wind pressure big It is small, to guarantee the normal work of blast switch.General diaphragm unit all includes diaphragm support, and diaphragm support is equipped with top Bar, diaphragm support periphery are provided with ring film, and the structure of traditional diaphragm unit is held as shown in Figure 1, having on diaphragm support 1 ' The groove of the inward flange of ring film 2 ' is set, diaphragm support 1 ', which is equipped with, is located at groove inside and bending outwardly to be resisted against ring Bending part 11 ' on the surface of shape diaphragm 2 ', bending part 11 ' are easy to pierce through ring film at bending stationary annular diaphragm 2 ' 2 ', gap is easy to produce between bending part 11 ' and ring film 2 ', these influence diaphragm unit air-tightness the case where will lead to The detecting function of blast switch is impaired；Secondly, the diaphragm unit structural stability of this structure is poor, diaphragm unit is made in production Also it is easy to happen damage during making, and production process is cumbersome, is unfavorable for manufacturing.

Utility model content

To solve the above-mentioned problems, the purpose of this utility model is to provide a kind of good blast switch of leakproofness.

The utility model be solve its technical problem and the technical solution adopted is that:

A kind of blast switch, comprising: pedestal, lid and the diaphragm unit being set between base and cover body, diaphragm group Part constitutes the positive pressure chamber and negative pressure cavity of sealing with lid and pedestal respectively, and the diaphragm unit includes diaphragm support, diaphragm support It is equipped with the mandril extended towards negative pressure cavity side, the periphery of diaphragm support is provided with ring film, the banjo clip of pedestal, lid Hold the edge of ring film；It is respectively arranged with public terminal, normally opened terminal and normally closed terminal on the pedestal, is set on the pedestal Being equipped with can be electrically connected and elastic slice component corresponding with mandril with normally opened terminal or normally closed terminal, and the mandril is towards pedestal Direction movement and link elastic slice component to be electrically connected the normally opened terminal；At least one is offered on the diaphragm support to pass through Perforation, the ring film be equipped with take shape in inside the through hole and with the integrally formed connecting column of ring film.

The diaphragm support is rounded lamellar, and the circumferential edges of diaphragm support are intervally distributed with several through holes, institute Ring film is stated to take shape in the circumferential edges of diaphragm support and all through holes can be run through to form the connecting column, Jin Eryu Diaphragm support forms integral structure.

The ring film includes being separately formed in the upper bound edge of the upper and lower surfaces of the circumferential edges of diaphragm support With lower bound edge, the both ends of the connecting column are connect with upper bound edge and lower bound edge respectively, and upper bound edge, connecting column and lower bound edge constitute work Word structure.

The one end in the upper bound edge and lower bound edge towards outside is connected and is formed between connecting column for wrapping up diaphragm The package space of the circumferential edges of bracket.

The elastic slice component includes the movable contact spring that one end is fixed in negative pressure cavity and is electrically connected with the public terminal, institute State normally opened terminal and normally closed terminal be located at the upper side and lower side of movable contact spring, the movable contact spring be equipped with can respectively with it is normally opened The movable contact that terminal and normally closed terminal are electrically connected is provided with an action movie below the mandril, and the pedestal is equipped with position It being connect in the first end of the elastic slice in negative pressure cavity, the elastic slice with action movie, the second end of elastic slice and the free end of movable contact spring connect, The upper surface of the mandril towards the movable contact that can link when the movement of the direction of pedestal is in contact with normally opened terminal.

It is respectively arranged with the first adjustment screw being connected with normally closed terminal on the pedestal and is connected with public terminal Second adjustment screw.

The beneficial effects of the utility model are: the blast switch of the above structure forms on the diaphragm support for being equipped with through hole Ring film, using taking shape in inside through hole and ring film is fixed on diaphragm support with the connecting column of ring film one On, the air-tightness and structural stability of diaphragm unit are improved, to guarantee the accuracy of the measurement function of blast switch, is avoided Ring film is damaged during production diaphragm unit and influences the normal work of blast switch, and simplifies blast switch Production process improves production efficiency.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the schematic diagram of internal structure of the utility model；

Fig. 3 is the structural schematic diagram that diaphragm unit, lid and pedestal are removed in Fig. 2；

Fig. 4 is the structural schematic diagram of diaphragm unit；

Fig. 5 is the structural decomposition diagram of Fig. 4；

Fig. 6 is the schematic cross-section of diaphragm unit；

Fig. 7 is the partial enlarged view of the part A of Fig. 6.

Specific embodiment

Utility model will be further described in detail below with reference to the attached drawings and specific embodiments, however, it is desirable to say Bright, the explanation to following implementation is schematically, not constitute the specific restriction to the utility model.

Referring to Figure 1 to Figure 7, a kind of blast switch, comprising: pedestal 1, lid 2 and be set between pedestal 1 and lid 2 Diaphragm unit 3, diaphragm unit 3 constitutes the positive pressure chamber and negative pressure cavity of sealing, the diaphragm unit 3 with lid 2 and pedestal 1 respectively Including diaphragm support 31, diaphragm support 31 is equipped with the mandril 32 extended towards negative pressure cavity side, and the periphery of diaphragm support 31 is set Be equipped with ring film 33, pedestal 1, lid 2 flange holding ring shape diaphragm 33 edge；Public affairs are respectively arranged on the pedestal 1 It is total to terminal 11, normally opened terminal 12 and normally closed terminal 13, being provided on the pedestal can be with normally opened terminal 12 or normally closed terminal 13 It is electrically connected and elastic slice component corresponding with mandril 32, the mandril 32 moves and the shrapnel group that links towards the direction of pedestal 1 Part is to be electrically connected the normally opened terminal 12；At least one through hole 311, the circular membrane are offered on the diaphragm support 31 Piece 33 be equipped with take shape in 311 inside of the through hole and with the integrally formed connecting column 331 of ring film 33.In the present embodiment In, the diaphragm support 31 is rounded lamellar, and the circumferential edges of diaphragm support 31 are intervally distributed with several through holes 311, The ring film 33 takes shape in the circumferential edges of diaphragm support 31 and can be through all through hole 311 to form the connection Column 331, and then integral structure is formed with diaphragm support 31.The blast switch of the above structure is on the diaphragm support for being equipped with through hole Ring film is formed, using taking shape in inside through hole and ring film is fixed on diaphragm with the connecting column of ring film one On bracket, the air-tightness and structural stability of diaphragm unit are improved, to guarantee the accuracy of the measurement function of blast switch, is kept away Exempt to damage ring film during producing diaphragm unit and influence the normal work of blast switch, and simplifies wind pressure and open The production process of pass improves production efficiency.

Wherein, the ring film 33 includes being separately formed in the upper and lower surfaces of the circumferential edges of diaphragm support 31 Upper bound edge and lower bound edge, the both ends of the connecting column 331 connect with upper bound edge and lower bound edge respectively, upper bound edge, connecting column 331 I-shaped structure is constituted with lower bound edge.

The one end in the upper bound edge and lower bound edge towards outside is connected and is formed between connecting column 331 for wrap film The package space of the circumferential edges of plate rack 31, package space can further consolidate ring film 32 and diaphragm support 31 Ground links into an integrated entity.

In the present embodiment, the elastic slice component include one end be fixed in negative pressure cavity and with the public terminal 11 electrically The movable contact spring 41 of connection, the normally opened terminal 12 and normally closed terminal 13 are located at the upper side and lower side of movable contact spring 41, described dynamic The movable contact 411 that can be electrically connected respectively with normally opened terminal 12 and normally closed terminal 13, the mandril 32 are provided on reed 41 Lower section be provided with an action movie 42, the pedestal 1 is equipped with the elastic slice 43 being located in negative pressure cavity, the first end of the elastic slice 43 with Action movie 42 connects, and the second end of elastic slice 43 is connect with the free end of movable contact spring 41, and the mandril 32 is transported towards the direction of pedestal 1 Can the link when dynamic upper surface of the movable contact 411 is in contact with normally opened terminal 12.The elastic slice modular construction letter of the above structure Easily, job stability is high.

The working principle of the blast switch are as follows: the diaphragm unit 3 drives mandril 32 towards close to base under the action of wind pressure The direction movement of seat 1, mandril 32 push the action movie 42 to move towards the direction close to pedestal 1, and action movie 42 pushes elastic slice 43 First end moved towards the direction of pedestal 1, the second end of elastic slice 42 makes movable contact spring 41 towards far from pedestal 1, close to diaphragm unit 3 Direction movement, i.e. movable contact 411 on movable contact spring 41 are moved towards the normally opened terminal 12 close to blast switch, until movable contact 411 Upper surface contacted with normally opened terminal 12, so that blast switch is connected to.

In the present embodiment, the first adjustment screw being connected with normally closed terminal 13 is also respectively provided on the pedestal 1 (not shown) and the second adjustment screw (not shown) being connected with public terminal 11.It is adjusted by described in turn first Whole screw and second adjustment screw, the operating pressure of adjustable blast switch.

The foregoing is merely the preferred embodiments of the utility model, however it is not limited to above specific embodiment, as long as Realize that the technical solution of the utility model aim belongs within the protection scope of the utility model with essentially identical means.

Claims (6)

1. a kind of blast switch, comprising: pedestal, lid and the diaphragm unit being set between base and cover body, diaphragm unit Constitute the positive pressure chamber and negative pressure cavity of sealing with lid and pedestal respectively, the diaphragm unit includes diaphragm support, on diaphragm support Equipped with the mandril extended towards negative pressure cavity side, the periphery of diaphragm support is provided with ring film, the flange clamping of pedestal, lid The edge of ring film；It is respectively arranged with public terminal, normally opened terminal and normally closed terminal on the pedestal, is arranged on the pedestal Having can be electrically connected and elastic slice component corresponding with mandril with normally opened terminal or normally closed terminal, and the mandril is towards pedestal Direction moves and links elastic slice component to be electrically connected the normally opened terminal；

It is characterized by: offering at least one through hole on the diaphragm support, the ring film is equipped with and takes shape in institute State inside through hole and with the integrally formed connecting column of ring film.

2. a kind of blast switch as described in claim 1, it is characterised in that:

The diaphragm support is rounded lamellar, and the circumferential edges of diaphragm support are intervally distributed with several through holes, the ring Shape diaphragm takes shape in the circumferential edges of diaphragm support and can be through all through hole to form the connecting column, and then and diaphragm Bracket forms integral structure.

3. a kind of blast switch as claimed in claim 2, it is characterised in that:

The ring film includes being separately formed the upper bound edge in the upper and lower surfaces of the circumferential edges of diaphragm support under Bound edge, the both ends of the connecting column are connect with upper bound edge and lower bound edge respectively, and upper bound edge, connecting column and lower bound edge constitute I-shaped knot Structure.

4. a kind of blast switch as claimed in claim 3, it is characterised in that:

The one end in the upper bound edge and lower bound edge towards outside is connected and is formed between connecting column for wrapping up diaphragm support Circumferential edges package space.

5. a kind of blast switch as described in claim 1, it is characterised in that:

The elastic slice component includes the movable contact spring that one end is fixed in negative pressure cavity and is electrically connected with the public terminal, described normal Beginning and normally closed terminal are located at the upper side and lower side of movable contact spring, the movable contact spring be equipped with can respectively with normally opened terminal The movable contact being electrically connected with normally closed terminal, is provided with an action movie below the mandril, the pedestal be equipped be located at it is negative Intracavitary elastic slice is pressed, the first end of the elastic slice is connect with action movie, and the second end of elastic slice and the free end of movable contact spring connect, described The upper surface of mandril towards the movable contact that can link when the movement of the direction of pedestal is in contact with normally opened terminal.

6. a kind of blast switch as described in claim 1, it is characterised in that:

For being respectively arranged with the first adjustment screw being connected with normally closed terminal on the pedestal and being connected with public terminal Two adjustment screws.