CN2101936U

CN2101936U - Miniature pressure relay

Info

Publication number: CN2101936U
Application number: CN 91223126
Authority: CN
Inventors: 许墨来; 杨铁城
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-08-17
Filing date: 1991-08-17
Publication date: 1992-04-15

Abstract

The utility model relates to miniature pressure relay used for the industrial equipment, which is characterized in that the miniature pressure relay comprises an impelling portion of gas (liquid) pressure and a control circuit portion. The impelling portion of gas (liquid) pressure comprises a shell body, a push rod, a rubber seal and a cushion ring. The shell body is provided with a gas (liquid) inlet. The control circuit portion comprises a base component, a micro switch, a push board, a spring, the screw and the screw nut of spring adjustment, a copper pin, the wiring screw and the screw nut of an outer connection wire. The advantages are simple structure, small size, light weight, low cost, sensitive reaction, convenient regulation and simple operation.

Description

Miniature pressure relay

The utility model belongs to a kind of commercial plant protective device, particularly a kind of industrial equipment micro pressure relay.

Present domestic industry pressure switch, most complex structure, volume is big, the cost height, regulate inconvenience, the needs that modernization industry development of incompatibility China and automatization level improve day by day, simultaneously for above-mentioned reasons, make its scope of application narrow relatively, can not on many relevant devices, be applied; Though the pressure switch volume of external advanced country is little, performance is good, cost is low, and its contact signal has only a pair of " often opening ", does not also satisfy the requirement of many sophisticated equipments, causes it also to exist the shortcoming of " range of application narrow be unfavorable for penetration and promotion ".

The purpose of this utility model be to provide a kind of simple in structure, volume is little; electricity is coupled the industrial liquid--electricity or gas--of low, the easy to adjust and applied range of cost; reach the micro pressure relay that hydraulic pressure or air pressure are protected; to satisfy the demand of various sophisticated equipments to safety guard; also can be used on simultaneously of the pressure control switch use of the frequent place of action, to remedy the shortcoming of industrial pressure protective device deficiency as equipment.

The technical solution of the utility model: a kind of micro pressure relay, comprise that gas (liquid) pressure promotes part and control circuit part, said gas (liquid) is pressed and is promoted partly to be made up of housing, push rod, rubber envelope, packing ring, air inlet (liquid) mouth is arranged on the housing, there is sealing gasket the port, said control circuit partly is by substrate, and sensitive switch, push pedal, spring, spring adjustment screw and nut, copper pin, external connection terminal screw and nut are formed; Rubber envelope places in the housing and seals air inlet (liquid) mouthful on the housing, put packing ring on it, the packing ring center is inserted with push rod, be with rubber envelope and contact shape, the push rod top is push pedal, the copper pin that has the push pedal of making to be connected in the push pedal with substrate, the push pedal top is a sensitive switch, and push pedal is joined with adjustment screw simultaneously, and adjustment screw has adjusting nut outward, the spring of regulating pressure is arranged on the adjustment screw bar, sensitive switch contacts with nut with the external connection terminal screw simultaneously, and said each member of control circuit part all is connected with substrate, and substrate is encapsulated in housing, only leave the head of screw and the external connection terminal screw head of regulating spring, have outer cover topped outside it.

The operation principle of the present utility model and the course of work: its principle is for when air inlet on the housing (liquid) when mouth pressure reaches rated pressure, and the rubber moving push rod that binds reaches push pedal again, sensitive switch is moved send signal, pressure relief danger.Its course of work is that the pipeline (gas or liquid) protected is when its pressure surpasses the rated pressure of being controlled; then its rubber envelope distortion promotes push rod; impel push pedal to overcome spring controlled pressure touch switch, sensitive switch action priming external connection sends signal alarm to remove superpressure and dangerous situation.

Except that existing capability, also can be used on the not frequent place of action and use in the above-mentioned control circuit as pressure control switch.

Superiority of the present utility model is: 1. simple in structure, volume is little, and is in light weight, and cost is low; 2. be quick on the draw, easy to adjust, applied range, simple to operate.

Further specify present technique below in conjunction with accompanying drawing and embodiment.

Accompanying drawing 1 is a structural representation of the present utility model.

Wherein 1 is the external connection terminal screw, and 2 is external connection wiring nut, and 3 is sensitive switch, 4 is push rod, and 5 is the copper pin, and 6 is housing, 7 is sealing gasket, and 9 are the rubber envelope, and 10 is packing ring, 11 are push pedal, and 13 is spring, and 14 is substrate, 15 is the spring adjusting nut, 16 is the spring adjustment screw, and 17 is outer cover, and 18 are air inlet (liquid) mouth.

Accompanying drawing 2 is another example structure schematic diagram of the present utility model.

Wherein: 12 is the precision swivel nut.

Embodiment: a kind of micro pressure relay, (referring to accompanying drawing 1) comprises that gas (liquid) pressure promotes part and control circuit part, said gas (liquid) is pressed and is promoted part by housing 6, push rod 4, rubber envelope 9, packing ring 10 is formed, air inlet (liquid) mouth 18 is arranged on the housing 6, there is sealing gasket 7 port, said control circuit partly is by substrate 14, sensitive switch 3, push pedal 11, spring 13, spring adjustment screw 16 and adjusting nut 15, copper pin 5, external connection terminal screw 1 is formed with nut 2, rubber envelope 9 places in the housing 6 and seals air inlet (liquid) mouthful on the housing, put packing ring 10 on it, the packing ring center is inserted with push rod 4, and be with rubber envelope and contact shape, the push rod top is push pedal 11, the copper pin that has the push pedal of making to be connected in the push pedal with substrate 14, the push pedal top is a sensitive switch 3, push pedal is joined with spring adjustment screw 16 simultaneously, adjusting nut 15 is arranged outside the adjustment screw 16, the spring 13 of regulating pressure is arranged on the adjustment screw bar, sensitive switch 3 contacts with nut 2 with external connection terminal screw 1 simultaneously, said each member of control circuit part all is connected with substrate 14, and substrate is encapsulated in housing, only leave the head of screw 16 and external connection terminal screw head 1 of regulating spring, have outer cover 17 topped outside it.

Said structure is the utility model general type, can increase the precision of regulating pressure limit for product embodiments, promptly adds precision swivel nut 12(in the Lower Half of spring adjustment screw 16 and sees accompanying drawing 2), then can reach the purpose of further raising pressure limit precision.

The effect of each adjustment screw among the related embodiment of the utility model, nut and precision swivel nut is to reach to make this relay find the optimum performance state promptly the most responsive to pressure position according to the adjustment to each adjustment screw or swivel nut.

The utility model is for guaranteeing its usefulness, then manufacture craft is taked to seal and press that to constitute housing assembly be that gas (liquid) is pressed and promoted part putting into rubber envelope 9, push rod 4, packing ring 10 in the housing 6 successively, then successively with push pedal 11, precision swivel nut 12(or add or do not add), copper pin 5, sensitive switch 3, spring 13, spring adjustment screw 16 combine with substrate 14 and constitute the control circuit part, at last control circuit is partly put into housing assembly and seal pressure, topped again outer cover 17 has constituted product embodiments of the present utility model.

Claims

1, a kind of micro pressure relay, it is characterized in that it comprises that gas (liquid) pressure promotes part and control circuit part, said gas (liquid) is pressed and promoted part is by housing, push rod, the rubber envelope, packing ring is formed, air inlet (liquid) mouth is arranged on the housing, said control circuit partly is by substrate, sensitive switch, push pedal, spring, spring adjustment screw and nut, the copper pin, external connection terminal screw and nut are formed, rubber envelope places in the housing and is encapsulated in air inlet (liquid) mouthful on the housing, put packing ring on it, the packing ring center is inserted with push rod, and be with rubber envelope and contact shape, the push rod top is push pedal, the copper pin that has the push pedal of making to be connected in the push pedal with substrate, the push pedal top is a sensitive switch, push pedal is joined with adjustment screw simultaneously, adjustment screw has adjusting nut outward, the spring of regulating pressure is arranged on the adjustment screw bar, sensitive switch contacts with nut with the external connection terminal screw simultaneously, above-mentioned each member of control circuit part all is connected with substrate, and substrate is encapsulated in housing, only leave the head of screw and the external connection terminal screw head of regulating spring, have outer cover topped outside it.

2,, it is characterized in that to add the precision swivel nut in the Lower Half of spring adjustment screw by the said micro pressure relay of claim 1.

3, by the said micro pressure relay of claim 1, the substrate that it is characterized in that being embedded with each member is to take to seal compression technology to combine with housing.