CN202972085U - Direct-flow piston type emergency shutoff valve - Google Patents
Direct-flow piston type emergency shutoff valve Download PDFInfo
- Publication number
- CN202972085U CN202972085U CN 201220611990 CN201220611990U CN202972085U CN 202972085 U CN202972085 U CN 202972085U CN 201220611990 CN201220611990 CN 201220611990 CN 201220611990 U CN201220611990 U CN 201220611990U CN 202972085 U CN202972085 U CN 202972085U
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- valve
- lumen
- main valve
- main
- valve body
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The utility model relates to a direct-flow piston type emergency shutoff valve. The direct-flow piston type emergency shutoff valve comprises a main valve and a pilot valve, wherein the valve body of the main valve is internally provided with an intermediate cavity control chamber, the inside of the intermediate cavity control chamber is connected with a valve flap through a main spring, the outer sidewall of the valve flap is in seal fit with the inner sidewall of the intermediate cavity control chamber, the valve flap is provided with an intermediate cavity inflow throttling hole communicated with the intermediate cavity control chamber, the intermediate cavity control chamber is provided with an intermediate cavity outflow throttling hole communicated with the valve body of the pilot valve, the valve body of the pilot valve is communicated with the outlet end of the valve body of the main valve through a first channel and is also communicated with the inlet end of the valve body of the main valve through a second channel, the valve body of the pilot valve is internally provided with a valve core between the second channel and the intermediate cavity outflow throttling hole, the valve core is used for controlling communication of the intermediate cavity outflow throttling hole with the first channel, and the pressure in the intermediate cavity control chamber can be increased to push the valve flap to close the main valve when the intermediate cavity outflow throttling hole is not communicated with the first channel. By the direct-flow piston type emergency shutoff valve, no additional dedicated separate water supply pipeline for fire control is needed for a water supply system, the construction cost of projects can be reduced, and daily water consumption can be decreased.
Description
Technical field
The utility model relates to a kind of direct current piston type emergency shut-in valve.
Background technique
At present, the fire-fighting water in cities and towns and domestic water are independently supplyings, and Design of Waterworks has the independent water supply network of special fire-fighting, to satisfy the needed water yield of fire-fighting fire extinguishing and hydraulic pressure.But the engineering construction cost of this water system and daily water consumption are all very high, and resource distribution is unreasonable, so life and the shared water supply system of fire-fighting are recommended by China.The shared water supply system of life and fire-fighting should guarantee at ordinary times domestic water under normal circumstances, fire-fighting water when guaranteeing fire again, therefore to prevent also that in addition the domestic water accessory from damaging because of the high pressure of fire service pump, need to a kind ofly domestic water can be cut off when the fire fire-fighting water for the design of life-fire shared water supply system, the emergency shut-in valve of recovery regular supply after fire-fighting finishes temporarily.
The model utility content
The utility model makes improvements for the problem that above-mentioned prior art exists, be that the technical problems to be solved in the utility model is to provide a kind of simple in structure, safe and reliable direct current piston type emergency shut-in valve, domestic water is cut off temporarily, recovers regular supply when the fire fire-fighting water after fire-fighting finishes, make water system need not separately establish the independent water supply network of special fire-fighting, saved widely engineering construction cost and daily water consumption.
in order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of direct current piston type emergency shut-in valve, comprise main valve, the control end of described main valve is connected with pilot valve, the entrance point of described valve body of main valve is provided with the main valve valve seat, be provided with the lumen control room in described valve body of main valve, be connected with the outer end through main spring in described lumen control room and can coordinate to close with the main valve valve base sealing flap of main valve, the madial wall in the outer side wall of described flap and lumen control room is sealed and matched, described flap offers the lumen that leads to the lumen control room and advances throttle orifice, described lumen control room is provided with the lumen that leads to pilot valve body and goes out throttle orifice, described pilot valve body is connected with the valve body of main valve outlet end and is connected with the valve body of main valve entrance point by second channel by first passage, the inherent second channel of described pilot valve body and lumen go out to be provided with between throttle orifice to be controlled lumen and goes out throttle orifice and be communicated with the spool of situation with first passage, described lumen control room goes out to boost when throttle orifice is not communicated with first passage at lumen and promotes flap and close main valve.
In technique scheme, this direct current piston type emergency shut-in valve is arranged in the system of biotope fire-fighting water and domestic water condominium water supply; At ordinary times under normal circumstances, this direct current piston type emergency shut-in valve is opened for domestic water.When fire needed fire-fighting water, because fire-fighting water pressure ratio domestic water pressure is high, fire service pump started, and when ductwork pressure surpasses the pressure set points of pilot valve, main valve valve autoshutdown, to cut off domestic water, guarantee enough fire-fighting waters; Prevent that simultaneously fire service pump when operation fire-fighting water from entering water tank, make that in life-fire shared water supply system, the domestic water accessory damages because of superpressure.After fire-fighting end, fire water pump are out of service, reduce with water pressure, valve is opened the recovery living water automatically.Compare with independent water supply of traditional fire-fighting and life, this direct current piston type emergency shut-in valve makes water system need not separately establish the independent water supply network of special fire-fighting, has saved widely engineering construction cost and daily water consumption.But that this direct current piston type emergency shut-in valve has is simple in structure, it is sensitive, safe and reliable to control, debugging facilitates, the little level installation of volume and the advantages such as at right angle setting, long service life.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Description of drawings
Fig. 1 is the utility model embodiment's opening state figure.
Fig. 2 is the utility model embodiment's closed condition figure.
In figure: 1-valve body of main valve, 2-lumen control room, 3-main spring, the 4-flap, the 5-seal ring, the 6-lumen advances throttle orifice, the 7-lumen goes out throttle orifice, 8-pilot valve body, 9-first passage, the 10-second channel, 11-spring, 12-left piston, the right piston of 13-, 14-pressure regulating screw, 15-pilot valve valve gap, the 16-pressure gauge, 17-O type circle, 18-main valve valve seat.
Embodiment
as shown in Fig. 1 ~ 2, a kind of direct current piston type emergency shut-in valve, comprise main valve, the control end of described main valve is connected with pilot valve, the entrance point of described valve body of main valve 1 is provided with main valve valve seat 18, be provided with lumen control room 2 in described valve body of main valve 1, described lumen control room 2 is interior to be connected with the outer end through main spring 3 and can be sealed and matched to close by seal ring 5 and main valve valve seat 18 flap 4 of main valve, the outer side wall of described flap 4 is sealed and matched by the madial wall in O type circle and lumen control room 2, described flap 4 offers the lumen that leads to lumen control room 2 and advances throttle orifice 6, described lumen control room 2 is provided with the lumen that leads to pilot valve body 8 and goes out throttle orifice 7, described pilot valve body 8 is connected with valve body of main valve 1 outlet end and is connected by the main valve valve seat 18 of second channel with valve body of main valve 1 entrance point by first passage 9, the inherent second channel 10 of described pilot valve body 8 and lumen go out to be provided with between throttle orifice 7 to be controlled lumen and goes out throttle orifice 7 and be communicated with the spool of situation with first passage 9, described lumen control room 2 goes out to boost when throttle orifice 7 is not communicated with first passage 9 at lumen and promotes flap 4 and close main valve.
In the present embodiment, described pilot valve ejects spool by spring 11 at the main valve inlet pressure during lower than the pilot valve setting pressure and controls lumen and go out throttle orifice 7 and be connected with first passage 9, and lumen went out throttle orifice 7 and opened this moment; Described pilot valve promotes spools by second channel 10 water inlets at the main valve inlet pressure during higher than the pilot valve setting pressure and controls lumen and go out throttle orifice 7 and be not communicated with first passage 9, and lumen goes out throttle orifice 7 and closes at this moment.
in the present embodiment, described spool comprises the left piston 12 that is supported by spring 11, be used for the switch lumen and go out the right piston 13 of throttle orifice 7 and the connecting rod that connects left piston 12 and right piston 13, the outer side wall of described left piston 12 and right piston 13 is sealed and matched by the madial wall of O type circle 17 with pilot valve body 8 respectively, the left end of described right piston 13 is provided with closes lumen when going out throttle orifice 7 and seal ring 5 that pilot valve body 8 is sealed and matched, described spring 11 is in pressure regulating screw 14 is arranged on pilot valve valve gap 15, described pilot valve valve gap 15 is connected with pilot valve body and generally can be connected by internal and external threads, set the pressure of pilot valve before using by pressure regulating screw 14.
In the present embodiment, be provided with pressure gauge 16 on described second channel 10, to detect the main valve inlet pressure.The pilot valve pressure setting of this direct current piston type emergency shut-in valve is very crucial: if pressure setting is too low, when living pump starts, direct current piston type emergency shut-in valve also can be closed; If pressure setting is too high, when fire service pump starts, direct current piston type emergency shut-in valve is not closed; General its pressure set points should be higher than the force value of Living Water design, the force value during lower than fire service pump design flow value.
During use: with the entrance point of this direct current piston type emergency shut-in valve be connected with the feed main, outlet end is connected with domestic water water supply arm, wherein the feed main also is connected with the fire-fighting water arm.During lower than the pilot valve setting pressure, pilot valve is in opening state when the main valve inlet pressure, and current flow through lumen in flap 4 and advance throttle orifice 6 and enter lumen control room 2, go out throttle orifice 7 by lumen and enter the outlet end that flow to again main valve in pilot valve.The aperture of while water pressure poor control pilot valve valve port (being that lumen goes out the valve openings between throttle orifice 7 and first passage 9), when the aperture of pilot valve valve port long-pending greater than the flow section that the lumen of flap 4 advances throttle orifice 6, be that the drain discharge in main valve lumen control room 2 is greater than flow of inlet water, therefore lumen control room 2 pressure decreaseds, the main valve inlet pressure is greater than lumen control room 2 internal pressures, automatically open main valve flap 4 and supply water to outlet end, main valve is in full-gear.When the main valve inlet pressure during higher than the pilot valve setting pressure, the lumen that the pilot valve right-hand member is closed main valve from the right piston 13 of pressure promotion of second channel 10 to left movement goes out throttle orifice 7, the water in the lumen control room 2 of main valve can not flow out by pilot valve, the lumen control room 2 internal pressures risings of main valve promote flap 4 and close main valve.
The above is only preferred embodiment of the present utility model, and all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (6)
1. direct current piston type emergency shut-in valve, comprise main valve, the control end of described main valve is connected with pilot valve, it is characterized in that: the entrance point of described valve body of main valve is provided with the main valve valve seat, be provided with the lumen control room in described valve body of main valve, be connected with the outer end through main spring in described lumen control room and can coordinate to close with the main valve valve base sealing flap of main valve, the madial wall in the outer side wall of described flap and lumen control room is sealed and matched, described flap offers the lumen that leads to the lumen control room and advances throttle orifice, described lumen control room is provided with the lumen that leads to pilot valve body and goes out throttle orifice, described pilot valve body is connected with the valve body of main valve outlet end and is connected with the valve body of main valve entrance point by second channel by first passage, the inherent second channel of described pilot valve body and lumen go out to be provided with between throttle orifice to be controlled lumen and goes out throttle orifice and be communicated with the spool of situation with first passage, described lumen control room goes out to boost when throttle orifice is not communicated with first passage at lumen and promotes flap and close main valve.
2. direct current piston type emergency shut-in valve according to claim 1 is characterized in that: described pilot valve is controlled lumen by the spring ejection spool at the main valve inlet pressure during lower than the pilot valve setting pressure and is gone out throttle orifice and be connected with first passage; Described pilot valve is intake by second channel during higher than the pilot valve setting pressure at the main valve inlet pressure and is promoted spool and control lumen and go out throttle orifice and be not communicated with first passage.
3. direct current piston type emergency shut-in valve according to claim 1 and 2, it is characterized in that: described spool comprises by spring-supported left piston, goes out the right piston of throttle orifice and the connecting rod that connects left piston and right piston for the switch lumen, the outer side wall of described left piston and right piston all is sealed and matched with the madial wall of pilot valve body, and described spring is in pressure regulating screw is arranged on the pilot valve valve gap.
4. direct current piston type emergency shut-in valve according to claim 3, is characterized in that: be provided with pressure gauge on described second channel.
5. direct current piston type emergency shut-in valve according to claim 3, it is characterized in that: the outer side wall of described flap, left piston and right piston is provided with O type circle.
6. direct current piston type emergency shut-in valve according to claim 3, it is characterized in that: the outer end of described flap and the left end of right piston are provided with seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220611990 CN202972085U (en) | 2012-11-19 | 2012-11-19 | Direct-flow piston type emergency shutoff valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220611990 CN202972085U (en) | 2012-11-19 | 2012-11-19 | Direct-flow piston type emergency shutoff valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202972085U true CN202972085U (en) | 2013-06-05 |
Family
ID=48513161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220611990 Withdrawn - After Issue CN202972085U (en) | 2012-11-19 | 2012-11-19 | Direct-flow piston type emergency shutoff valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202972085U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966775A (en) * | 2012-11-19 | 2013-03-13 | 福建高中压阀门科技有限公司 | Direct-current piston type emergency shutoff valve and application thereof |
-
2012
- 2012-11-19 CN CN 201220611990 patent/CN202972085U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966775A (en) * | 2012-11-19 | 2013-03-13 | 福建高中压阀门科技有限公司 | Direct-current piston type emergency shutoff valve and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20140226 |
|
| RGAV | Abandon patent right to avoid regrant |