CN2387921Y - Piston-type fire switch - Google Patents

Abstract

The utility model discloses a piston-type fireman's switch. A piston is arranged in a piston cavity which is arranged between a water inlet and outlet sections of a fire main which is provided with a lug boss, a booster valve and a pressure relief valve are axially front-back arranged in the lug boss along the fire main A water outlet of the booster valve and a water inlet of the pressure relief valve are communicated via a path arranged in the lug boss, and the middle part of the path is provided with a booster hole which is led into the piston cavity. The utility model overcomes the disadvantages of complicated structure, difficult processing, large volume and large weight in the prior art, and the utility model has the advantages of flexible and convenient operation.

Description

The piston type fireman's switch

The utility model relates to a kind of hydraulic pressure pressure reduction that utilizes and promotes the fireman's switch that piston opens and closes.

Existing fire product, if can form what generally adopt on the fire-fighting lance of water curtain is screw machine formula switch, relies on the open and close of the helical pressure control water curtain mouth that rotation forms.The subject matter of its existence is to use dumb, the long and effort of opening and closing time.For overcoming these defectives, the disclosed technology as Chinese patent ZL95225713.0 has appearred, it is built-in with circle formula piston at the rifle end of body, the outstanding projecting platform that fuses that forms with piston cavity is arranged outside the end, have two valve openings on it side by side, pressure charging valve and reduction valve are installed respectively, the differential water pressures of utilizing pressure charging valve and reduction valve switch to form comes opening and closing plate formula piston to reach the purpose of switch water curtain mouth, therefore than former mechanical switch rapid operation, easy to be flexible, actuation time is short.But this apparatus structure is unreasonable, and the passage that communicates with pressure charging valve and reduction valve is many and the position is intricate, and volume weight increases, processing difficulties.

It is rational in infrastructure that the purpose of this utility model is to provide, and volume is little, and is in light weight, handles more convenient labour-saving piston type fireman's switch.

The purpose of this utility model is achieved in that it is made of the fire protection pipeline that is provided with boss, piston, pressure charging valve, pressure-relief valve.Be provided with the piston cavity of built-in piston between fire protection pipeline inlet segment and the water exit end, pressure charging valve and pressure-relief valve axially are contained in the boss front and back along fire protection pipeline, the water intake of pressure charging valve communicates with the fire protection pipeline inlet segment, the water outlet of pressure charging valve and the channel connection of the water intake of pressure-relief valve by in boss, offering, also offer a pressurized hole that leads in the piston cavity in the middle of this passage, the water outlet of pressure-relief valve leads to outside the fire protection pipeline.

Because pressure charging valve and pressure-relief valve generally are by valve body, valve rod, Returnning spring constitutes the construction of switch of press type, can take to handle neatly with lower device the switch of pressure charging valve and pressure-relief valve: valve rod is as driven member, its top contacts with slide block, slide block can have two parallel planes up and down with the surface of contact of valve stem tip, two parallel up and down planes connect by plane inclined, inclined-plane and parallel surface intersect in obtuse angle, the length of lower plane is less than the distance between pressure charging valve and the pressure-relief valve valve rod, come and go and promote slide block, can press down one of them valve rod of pressure charging valve and pressure-relief valve, and guarantee that other valve rod is not pressed down, make pressure charging valve and pressure-relief valve be on off operating mode each other.Slide block can also be made cam or knob form, and they are identical with the surface of contact unfolded drawing and the slide block structure of valve stem tip.

The utility model is compared with prior art, and its structure is more reasonable, and the passage of supercharging, release is significantly simplified, and therefore processes easy; And for cooperating the channel arrangement of this supercharging, release, pressure charging valve and reduction valve are axially installed front and back along fire protection pipeline, and volume is reduced, and can adopt a slide-block mechanism control to open and close, and make operation more flexible, and be more convenient.The utility model can not only utilize on fire-fighting lance in addition, can also utilize and do the switch use on other fire protection pipeline.

By the following examples and in conjunction with the accompanying drawings wooden model utility is further described.

Fig. 1 is embodiment's 1 structural representation.

Fig. 2 is embodiment's 2 structural representations.

Fig. 1 is the embodiment who is applied in control water curtain switch on the fire-fighting lance, fire protection pipeline is that rifle body 1 has boss 6 with rifle mouth 15 threaded connection places, pressure charging valve 4 and pressure-relief valve 5 place in the boss 6 along the axial front and back of fire protection pipeline 1, the water curtain mouth is the water exit end 8 of fire protection pipeline, be provided with annular piston chamber 3 between inlet segment 7 and the water exit end 8, piston cavity 3 built-in annular pistons 2; The water intake 9 of pressure charging valve 4 communicates with fire protection pipeline 1 inlet segment 7, the water outlet 10 of pressure charging valve 4 and the water intake 11 of pressure-relief valve 5 are communicated with by the passage of offering in boss 6 12, also offer a pressurized hole 13 that leads in the piston cavity 3 in the middle of this passage 12, the water outlet 14 of pressure-relief valve leads to outside the fire protection pipeline 1.

Pressure charging valve 4 and pressure-relief valve 5 are made of valve body 23, valve rod 16, Returnning spring 22, press lower valve rod 16 after, pressure charging valve 4 or pressure-relief valve 5 are open-minded.In the present embodiment, boss 6 upper surfaces are exposed on valve rod 16 tops, at boss 6 upper surfaces slide block 17 are arranged, and slide block 17 is higher planes 18 with the two ends of the surface of contact on valve rod 16 tops, the centre is lower plane 20, and plane 18 and plane 20 are parallel and by two inclined-plane 19 transition.Whole slide block can slidably reciprocate, and the maximum displacement of sliding in plane 20 is less than the distance between pressure charging valve 4 and pressure-relief valve 5 valve rods 16.When slide block 17 was mobile backward, slide block 17 was pressed the pressure charging valve valve rod, made pressure charging valve 4 conductings, and 5 of reduction valve are in closed condition.Press water in the rifle body 1 enters piston cavity 3 by the water intake 9 of pressure charging valve 4 through passage 12 and pressurized hole 13, promotes piston 2 reaches, makes water curtain mouth 8 closures, and water curtain is closed; When slide block 17 moves forward, slide block 17 is pressed the reduction valve valve rod, make reduction valve 5 conductings, 4 of pressure charging valves are in closed condition, and at this moment the press water in the piston cavity 3 is by water outlet 14 outer the rushing down of pressure-relief valve, and the back pressure of piston 2 is laid down, simultaneously the press water in the rifle body 1 is by water outlet window 21 outwash corresponding with water curtain mouth 8 on the rifle mouth 15, to pusher, water curtain mouth 8 is opened with piston 2, and press water is gone out the formation water curtain from water curtain mouth 8.

The fireman's switch that embodiment illustrated in Figure 2 is universal.Its main structure and component are identical with embodiment illustrated in Figure 1.It replaces slide block 17 with a knob, and this knob is identical with the surface of contact that the surface of contact of valve stem tip launches back and embodiment's 1 top slide block slide block 17 and valve rod 16 tops.When pressing the pressure charging valve valve rod along a direction rotary knob, make pressure charging valve 4 conductings, 5 of reduction valve are in closed condition, press water in the fire-prevention pipe 1 enters piston cavity 3 by the water intake 9 of pressure charging valve 4 through passage 12 and pressurized hole 13, promote piston 2 reaches, make water exit end 8 closures, play closing function; On the contrary, when knob is pressed the reduction valve valve rod, make reduction valve 5 conductings, 4 of pressure charging valves are in closed condition, at this moment the press water in the piston cavity 3 is by water outlet 14 outer the rushing down of pressure-relief valve, and the back pressure of piston 2 is laid down, and is installed in the spring restoring force effect in the piston cavity, to pusher, water exit end 8 is opened and plays the unlatching effect by post-tensioning for piston 2.

Claims (2)

1, piston type fireman's switch is made of the fire protection pipeline that is provided with boss (6) (1), piston (2), pressure charging valve (4), pressure-relief valve (5).Its feature in:

Be provided with the piston cavity (3) of built-in piston (2) between fire protection pipeline (1) inlet segment (7) and the water exit end (8), pressure charging valve (4) and pressure-relief valve (5) axially are contained in the boss (6) front and back along fire protection pipeline, the water intake (9) of pressure charging valve (4) communicates with fire protection pipeline (1) inlet segment (7), the water outlet (10) of pressure charging valve (4) and the water intake (11) of pressure-relief valve (5) are communicated with by the passage of offering in boss (6) (12), also offer a pressurized hole (13) that leads in the piston cavity (3) in the middle of this passage (12), the water outlet of pressure-relief valve (14) leads to outside the fire protection pipeline (1).

2, piston type fireman's switch according to claim 1 is characterized in that:

The valve rod (16) of pressure charging valve (4) and pressure-relief valve (5) is as driven member, its top contacts with slide block (17), slide block (17) has parallel two planes (18) (20) up and down with the surface of contact on valve rod (16) top, parallel up and down two planes (18) (20) can be passed through plane inclined (19) and connect, inclined-plane (19) intersects in obtuse angle with parallel surface (18) (20), and the length of lower plane (20) is less than the distance between pressure charging valve (4) and pressure-relief valve (5) valve rod.