CN201332057Y

CN201332057Y - Vapor pressure switch

Info

Publication number: CN201332057Y
Application number: CNU2008202088746U
Authority: CN
Inventors: 张贵超; 匡柳
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-31
Filing date: 2008-12-31
Publication date: 2009-10-21
Anticipated expiration: 2018-12-31

Abstract

The utility model discloses a vapor pressure switch, which can be installed in a vapor pipeline to realize fast start and stop through the vapor pressure, and mainly comprises an upper shell, a lower shell, a base, a fixed ring, a sealing part, a pressure elastic sheet, a movable top block, an upper cover, a micro-switch and a screw bolt. The structure improves the micro-switch which comprises a switch base, a switch elastic sheet, a pre-pressing elastic sheet and a switch contact. The improved structure can push the movable top block to move through vapor pressure, a top bar on the movable top block is used to upwards push the micro-switch to start and stop, and the start and stop force of the micro-switch is adjusted by the screw bolt, and the material characteristics of the switch elastic sheet in the micro-switch is utilized to restore position for triggering and conducting the switch contact. The vapor pressure switch has few elements, simple and reliable structure and accurate pressure adjustment, can not generate the switch failure after long-term operation under high-temperature high-pressure environment, can be used more stably and safely, and avoid the serious safety accidents.

Description

A kind of steam pressure switch

Technical field

The utility model relates to a kind of pressure switch, refers in particular to a kind of steam pressure switch that utilizes steam pressure to realize fast opening and closing.

Background technology

Steam pressure switch is a kind of switch module that utilizes steam pressure to realize fast opening and closing in the steam pipework that is installed in, the steam pressure switch of selling in the market and using is mostly with disclosed China Patent No. " pressure switch " structural similarity as 200720143084.X, by base, retainer plate, seal, the pressure shell fragment, movable jacking block, loam cake, formation such as sensitive switch and screw rod, sensitive switch also comprises a spring that can make the movable top block reset, spring base and pad, when steam pressure makes its distortion of upwards arching upward greater than the pressure shell fragment after, can move upward by promotion activity jacking block, touch sensitive switch and open; When steam pressure during, utilize spring force to promote the movable top block reset and break away from sensitive switch less than the pressure shell fragment.This structure is carried out resetting of movable jacking block owing to elements such as utilizing spring, make that not only part increases, it is complicated that structure becomes, and spring is in for a long time under the high temperature and high pressure environment and compresses repeatedly and discharge, elastic fatigue appears easily, the precompressed and the keying of sensitive switch are affected, and pressure regulation is not accurate enough, causes switch failure and serious security incident takes place.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the defective of prior art and provides a kind of simple in structure, reliable, uses stable, safety, and pressure regulation is steam pressure switch accurately.

Technical problem of the present utility model is achieved through the following technical solutions:

A kind of steam pressure switch comprises interconnected upper shell and lower house, is provided with the base of connecting with steam on lower house, is equipped with successively on the base by retainer plate fixing seal, pressure shell fragment, movable jacking block and loam cake; Described loam cake top is provided with sensitive switch, and this sensitive switch is provided with compress switch the in advance screw rod of hoisting capacity of adjusting; Push rod on the described movable jacking block passes loam cake and is subjected to steam pressure to change the shake-up sensitive switch, it is characterized in that described sensitive switch comprises the switch base that is installed in the loam cake top, be provided with the switch contact of two contact conductings in this switch base, these two switch contacts correspondence respectively are arranged on a switch base and the switch shrapnel; Described switch shrapnel is installed in the switch base, and push rod is subjected to steam pressure to change this switch shrapnel of shake-up; Described switch shrapnel top also is provided with the precompressed shell fragment with its disjunctor, and this precompressed shell fragment contacts with screw rod, and regulates precompression by the screw rod lifting.

The connection of described upper shell and lower house is to be respectively equipped with the cutting of mutual close-fitting and slot or to be threaded between upper and lower casing.

Be respectively equipped with the guide pad and the pilot hole of active mounting between described movable jacking block and the loam cake.

Described pressure shell fragment is the high temperature high-pressure resistant material that stainless steel or beryllium copper are made.

Described switch shrapnel is to be provided with erection column in switch base with being connected of switch base, and switch shrapnel one end is movable hinged on this erection column.

Compared with prior art, the utility model is that the sensitive switch to steam pressure switch improves, structure after the improvement utilizes steam pressure promotion activity jacking block motion carrying out sensitive switch to open and close, utilize screw rod to regulate the hoisting capacity of this sensitive switch of precompressed, utilize the switch shrapnel material behavior reset enable switch contact in the sensitive switch to touch conducting, this pressure switch part is few, simple and reliable for structure, pressure regulation is accurate, and being in for a long time works under the high temperature and high pressure environment failure phenomenon can not occur yet, use safety and stability more, avoided the generation of serious security incident.

Description of drawings

Fig. 1 is a cutaway view of the present utility model.

Fig. 2 is a contour structures schematic diagram of the present utility model.

Fig. 3 is an exploded view of the present utility model.

Embodiment

To elaborate again to the utility model embodiment by above-mentioned accompanying drawing below.

As Fig. 1～shown in Figure 3,1-lower house, 2-seal, 3-retainer plate, 4-pressure shell fragment, 5-guide pad, 6-pilot hole, 7-switch contact, 8-switch base, 9-screw rod, 10-precompressed shell fragment, 11-upper shell, 12-switch shrapnel, 13-erection column, 14-push rod, the movable jacking block of 15-, 16-base, 17-slot, 18-transplant a cutting, the 19-loam cake.

A kind of steam pressure switch, comprise disc lower house 1 and cylindrical shape upper shell 11, be symmetrically arranged with two upwardly extending cutting 18 on the described lower house circumferential periphery, the upper shell barrel be provided with two with transplant a cutting the corresponding slot 17 in position, this cutting close-fitting is plugged on upper and lower casing is linked into an integrated entity.Described lower house 1 is provided with base 16, and the connector of this base bottom passes lower house and is connected in the steam pipework, is provided with seal 2, pressure shell fragment 4, movable jacking block 15 and loam cake 19 on the base successively, and is fixed in the base by retainer plate 3.Described seal 2 adopts high temperature high-pressure resistant material to make, and the seal groove that is inlaid in base 16 is interior to prevent steam leakage; The blow vent of pressure shell fragment 4 covering bases when entering steam in the base 16, is subjected to the steam pressure variation can produce strain and upwarps; Movable jacking block 15 is located in loam cake 19 and the pressure shell fragment 4 formed spaces and carries out upper and lower motion, the end face of this activity jacking block extends upward columniform push rod 14 and guide pad 5, push rod passes loam cake 19, and the guide pad active mounting is in the pilot hole 6 of loam cake bottom surface.

Described loam cake 19 tops are provided with sensitive switch, this sensitive switch comprises switch base 8, be provided with switch contact 7 in the switch base, another switch contact that should switch contact is welded on the switch shrapnel 12, this switch shrapnel middle part slightly is beneficial to touch to lower convexity, switch shrapnel is movable hinged on erection column 13 through the installing hole of an end, and erection column is fixed in the switch base, and the push rod 14 of movable jacking block 15 can be touched when moving upward and this switch shrapnel of pushing tow by the steam pressure variation; Described switch shrapnel 12 tops are provided with the precompressed shell fragment 10 with its disjunctor, and this precompressed shell fragment top is provided with the screw rod 9 that is in contact with it and is threaded on the switch base 8, gets final product the hoisting capacity of by-pass cock contact 7 by screw rod.

This steam pressure switch utilizes screw rod 9 precompressed to adjust the hoisting capacity of switch contact 7 before starting working, be installed in the steam pressure switch of jet chimney, its switch contact is in closed on-state, when high temperature and high pressure steam enters switch inside by the connector on the base 16, pressure shell fragment 4 induction steam pressures and deforming upwarp, and move on the drive activity jacking block 15, push rod 14 on the movable jacking block gets final product touch switch shell fragment 12, when steam pressure reaches the hoisting capacity of switch contact 7 gradually, push rod 14 touch switch contacts disconnect, the pipe-line system that produces steam this moment promptly stops heating, by the time steam pressure descends and during less than the hoisting capacity of switch contact 7, switch shrapnel 12 reset enable switch contacts are closed again, the system that produces steam heats once more, so circulation can make the steam pressure in the pipeline be in all the time in the certain value scope.

Steam pressure switch of the present utility model is regulated by screw rod 9 and is set the different pressures value, and to satisfy the demand of different vapour systems, pressure regulation accurately also can reach the purpose of safe handling.This structure is applicable to the various media of no corrosiveness, and the joint of various vapour systems also can be suitable for by the connector structure that changes base.

Claims

1, a kind of steam pressure switch, comprise interconnected upper shell (11) and lower house (1), on lower house, be provided with the base of connecting with steam (16), be equipped with successively on the base by retainer plate (3) fixing seal (2), pressure shell fragment (4), movable jacking block (15) and loam cake (19); Described loam cake (19) top is provided with sensitive switch, and this sensitive switch is provided with compress switch the in advance screw rod (9) of hoisting capacity of adjusting; Push rod (14) on the described movable jacking block (15) passes loam cake (19) and is subjected to steam pressure to change the shake-up sensitive switch, it is characterized in that described sensitive switch comprises the switch base (8) that is installed in loam cake (19) top, be provided with the switch contact (7) of two contact conductings in this switch base, these two switch contacts correspondence respectively are arranged on a switch base (8) and the switch shrapnel (12); Described switch shrapnel is installed in the switch base (8), and push rod (14) is subjected to steam pressure to change this switch shrapnel of shake-up; Described switch shrapnel (12) top also is provided with the precompressed shell fragment (10) with its disjunctor, and this precompressed shell fragment contacts with screw rod (9), and regulates precompression by screw rod (9) lifting.

2, a kind of steam pressure switch according to claim 1, the connection that it is characterized in that described upper shell (11) and lower house (1) are cutting (18) and the slots (17) that is respectively equipped with mutual close-fitting between upper and lower casing or are threaded.

3, a kind of steam pressure switch according to claim 1 and 2 is characterized in that being respectively equipped with between described movable jacking block (15) and the loam cake (19) guide pad (5) and the pilot hole (6) of active mounting.

4, a kind of steam pressure switch according to claim 1 and 2 is characterized in that described pressure shell fragment (4) is the high temperature high-pressure resistant material that stainless steel or beryllium copper are made.

5, a kind of steam pressure switch according to claim 3 is characterized in that described pressure shell fragment (4) is the high temperature high-pressure resistant material that stainless steel or beryllium copper are made.

6, a kind of steam pressure switch according to claim 1 and 2 is characterized in that described switch shrapnel (12) and being connected of switch base (8) are to be provided with erection column (13) in switch base, and switch shrapnel one end is movable hinged on this erection column.

7, a kind of steam pressure switch according to claim 3 is characterized in that described switch shrapnel (12) and being connected of switch base (8) are to be provided with erection column (13) in switch base, and switch shrapnel one end is movable hinged on this erection column.

8, a kind of steam pressure switch according to claim 4 is characterized in that described switch shrapnel (12) and being connected of switch base (8) are to be provided with erection column (13) in switch base, and switch shrapnel one end is movable hinged on this erection column.