CN201227490Y

CN201227490Y - Piston type rain alarm valve

Info

Publication number: CN201227490Y
Application number: CNU2008200377614U
Authority: CN
Inventors: 龙卫东; 弋建州; 张世凤
Original assignee: NANJING FIRE EQUIPMENT CO Ltd
Current assignee: NANJING FIRE EQUIPMENT CO Ltd
Priority date: 2008-06-20
Filing date: 2008-06-20
Publication date: 2009-04-29
Anticipated expiration: 2018-06-20

Abstract

The utility model relates to a piston type deluge alarm valve belonging to the technical field of a fire fighting device. The piston type deluge alarm valve comprises a valve body provided with a direct current channel; a working chamber is formed inside the valve body; the working chamber is internally provided with a piston component of which the upper end controls the make-and-break of the direct current channel, and contains a control chamber communicated with a starter; a float plate separating the working chamber from the control chamber is mounted in the control chamber; the lower end of the float plate props against a spring, and the middle of the float plate is fixedly connected with the piston component; the piston component and the float plate are provided with a first position and a second position, when the float plate and the piston component are in the first position, the spring is pressed down, and the direct current channel is started; when the float plate and the piston component are in the second position, the spring is reset, and the direct current channel is closed. The piston type deluge alarm valve has the advantages of simple structure, little hydraulic loss, convenient maintenance, high working pressure, rapid starting, circulated staring and closing, reliable work, and the like.

Description

The piston type alarm valve that drenches with rain

Technical field

The utility model relates to a kind of control valve for fluids, and especially a kind of piston type of controlling fire-fighting system pipe network alarm valve that drenches with rain belongs to the fire fighting device technical field.

Background technology

Understand according to the applicant, the existing alarm valve that drenches with rain is most to be the angie type drench valve of diaphragm seal and control and the through type drench valve of mechanical seal-barrier film control, and the passage of described diaphragm seal and control angie type drench valve is the angie type structure, and hydraulic loss is big; Mechanical seal-barrier film control through type drench valve is the opposite force sealing, and hermetically-sealed construction is stressed big, and sealing reliability is poor, and under the situation that guarantees the hand-reset function, can not carry out automatically reseting.Limited the expansion on engineering is used.

The utility model content

The purpose of this utility model is: at the shortcoming that above prior art exists, propose a kind of piston type simple in structure, that hydraulic loss is less alarm valve that drenches with rain.

In order to reach above purpose, the piston type of the present utility model alarm valve that drenches with rain comprises the valve body with direct current channel; Form working chamber in the described valve body; The piston component of upper end control direct current channel break-make is housed in the described working chamber, and the control chamber that is communicated with starting drive of containing; Float plate with working chamber and control chamber separation is installed in the described control chamber; The lower end abutment of described float plate is on spring, and middle part and piston component are connected; Described piston component and float plate have first and second position, and when float plate was in primary importance together with piston component, spring was depressed, and direct current channel is opened; When float plate is in the second place together with piston component, spring reset, direct current channel is closed.

The alarm valve structure that drenches with rain piston type of the present utility model can realize making the control chamber pressure release, thereby produce pressure differential between working chamber and control chamber by starting drive control, drives float plate and is shifted together with piston component, reaches the purpose of Open valve.

Above-mentioned described piston component is shaped on the aperture that is communicated with working chamber and control chamber.Like this, the piston type alarm valve that drenches with rain can pressurize to control chamber by aperture after unlatching, thereby realizes closing automatically of valve.

Piston type of the present utility model drenches with rain that alarm valve is simple in structure, hydraulic loss is little, easy to maintenance, and have the operating pressure height, start rapidly, can realize advantages such as circulation keying, reliable operation.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the closed condition structural representation of an embodiment of the utility model.

Fig. 2 is the opening structural representation of an embodiment of the utility model.

The specific embodiment

Embodiment one

The piston type of present embodiment drenches with rain alarm valve as depicted in figs. 1 and 2, valve body by upper and lower casing 1 and 11 and control chamber three parts at middle part connect and compose by bolt, easy to assembly.The valve body two ends are shaped on flange-interface respectively, axially form direct current channel, and the direct current channel stage casing forms working chamber 2.The piston component of upper end control direct current channel break-make is housed in the working chamber 2, and contains the control chamber 7 that is made of inner casing, this control chamber is communicated with starting drive by interface 9.Piston component is formed by fixedly connecting by piston 3 and connecting rod 5 and terminal pad 4.The upper end of connecting rod 5 is mushroom, is inserted in the centre bore of terminal pad 4 and leans in the concave cone of piston 3 lower surfaces, and terminal pad 4 is embedded in the depression of piston 3 lower surface correspondences, fixes by holding screw.The following end of thread of connecting rod 5 passes float plate 6, and is fixedly connected by nut.The float plate 6 that working chamber 2 and control chamber 7 are separated is installed in the control chamber 7, and the lower end abutment of this float plate is on spring 8.Piston component and float plate 6 have first and second position, and when float plate 6 was in primary importance together with piston component, spring 8 was depressed, and direct current channel is opened (referring to Fig. 1); When float plate 6 was in the second place together with piston component, spring 8 resetted, and direct current channel is closed (referring to Fig. 2).Have the aperture 11 that is communicated with working chamber 2 and control chamber 7 on the connecting rod 5.

The piston type of present embodiment drenches with rain alarm valve when being in quasi-operating status, and piston 3 is in the position of valve-off under the effect of spring and waterpower, as shown in Figure 1.When the condition of a fire takes place when, control device is opened control channel and is made control chamber 7 pressure releases, the active force that the pressure official post float plate 6 of working chamber 2 and control chamber 7 overcomes spring 8 is depressed, drive piston 3 and be in valve opening position shown in Figure 2, pressure flow discharges to system pipe network by working chamber, implements fire extinguishing.

Facts have proved; the piston type of present embodiment drenches with rain that alarm valve is simple in structure, hydraulic loss is little, easy to maintenance; and have the operating pressure height, start characteristics such as rapid, capable of circulation keying, reliable operation; can be equipped with corresponding deluge system, drencher, waterfog head, automatic sprinkler and fire alarm extinguishment control system; form deluge system, water curtain system, spraying system, preact system; be widely used in water spray, water spray, froth fire extinguishing system and low, the middle pressure fine water mist fire-extinguishing system, fire separation and flame failure protection are implemented in the guard plot.

In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

Claims

1, a kind of piston type alarm valve that drenches with rain comprises the valve body with direct current channel; Form working chamber in the described valve body; It is characterized in that: the piston component of upper end control direct current channel break-make is housed in the described working chamber, and the control chamber that is communicated with starting drive of containing; Float plate with working chamber and control chamber separation is installed in the described control chamber; The lower end abutment of described float plate is on spring, and middle part and piston component are connected; Described piston component and float plate have first and second position, and when float plate was in primary importance together with piston component, spring was depressed, and direct current channel is opened; When float plate is in the second place together with piston component, spring reset, direct current channel is closed.

2, according to the described piston type of claim 1 alarm valve that drenches with rain, it is characterized in that: described piston component is shaped on the aperture that is communicated with working chamber and control chamber.

3, according to the described piston type of claim 2 alarm valve that drenches with rain, it is characterized in that: described piston component is made of piston and connecting rod and terminal pad, the upper end of described connecting rod is mushroom, be inserted in the centre bore of terminal pad and lean in the concave cone of piston lower surface, described terminal pad is embedded in the depression of piston lower surface correspondence fixedly connected.

4, according to the described piston type of claim 3 alarm valve that drenches with rain, it is characterized in that: it is fixedly connected that float plate is passed in the lower end of described connecting rod, and described connecting rod is provided with the aperture that is communicated with working chamber and control chamber.