CN2279488Y

CN2279488Y - Micro-resistance slow-closing suction vavle

Info

Publication number: CN2279488Y
Application number: CN 96223555
Authority: CN
Inventors: 陈宏道; 周宗汉; 王群
Original assignee: NANJING WATER SUPPLY AND POWER SUPPLY DEPOT NANJING RAILWAY BRANCH BUREAU
Current assignee: NANJING WATER SUPPLY AND POWER SUPPLY DEPOT NANJING RAILWAY BRANCH BUREAU
Priority date: 1996-08-30
Filing date: 1996-08-30
Publication date: 1998-04-22
Anticipated expiration: 2006-08-30

Abstract

The utility model relates to a micro-resistance slow-closing suction valve, being a device which is used on a water absorption pipeline to prevent water from back flowing and devastating water hammer. The utility model is mainly composed of a valve body, a valve plate, a slow-closing device and an electromagnetic valve, and the slow-closing device comprises a piston, a push rod, a water cylinder, a water inlet pipe and a drain pipe and is arranged on the lower end of a water inlet in the valve body. The upper end of the valve plate is hinged with the upper part of the water inlet in the valve body, and the valve plate can cover the whole water inlet and be covered on the push rod in the slow-closing device. The push rod is fixed on the piston, and the water inlet pipe is connected with the water outlet part of a water pump through the electromagnetic valve.

Description

The micro-resistance slowly-closed suction valve

The utility model is a kind of refluence of anti-sealing on the suction piping and device of destructive pump-stopping water hammer of being applied in, and belongs to the technical field of water pump safety features.

When medium-sized or large-scale feed water pump is worked; in order to prevent because of shutting down or refluence and the destructive pump-stopping water hammer that causes water that have a power failure suddenly causes water pump to damage; common way is that device such as safety check is installed on the lifting pipe of pump; the water hammer that causes when adopting this method to prevent orderly closedown; but programmed sequence of operations trouble, and the water hammer that causes the destruction that can not prevent to have a power failure suddenly to pump.Up-to-date a kind of micro-resistance slowly-closed bottom valve waterborne that occurred, this valve are to improve on the basis of bottom valve on the ordinary water, but the structure more complicated and the also inconvenience that operates.

Goal of the invention of the present utility model provides a kind of easy and simple to handle, and the reliability height can effectively prevent the micro-resistance slowly-closed suction valve of destructive water hammer.

The utility model mainly is made up of valve body 1, valve plate 2, slow closing device 3, solenoid valve 4, slow closing device is located at the bottom of water intake 1-1, the upper end of valve plate is hinged on the top of water intake, when valve plate falls, valve plate can cover whole water intake, and this moment valve plate the lower end can cover on the push rod 3-2 in slow closing device 3.Slow closing device is made up of piston 3-1, push rod 3-2, water vat 3-3, intake pipe 3-4, drain pipe 3-5, piston is arranged in water vat, the front end of piston is a push rod, the front end of push rod stretches out water vat, the rear end of water vat is provided with an intake pipe and a drain pipe respectively, and drain pipe links to each other with the sluicing speed adjusting device.Intake pipe links to each other with the waterexit end of water pump by solenoid valve, and solenoid valve connects timer, and its opening time, the power end of this timer was connected with the power end of water pump by this timer control.The working procedure of this valve is: when water pump was connected power work, solenoid valve was also opened simultaneously, and water flows to from water intake, this moment, current started valve plate, valve plate rotates to level, and when current flowed out by water pump, partial pressure water flow to water vat by the intake pipe that connects in the slow closing device, and the promotion piston mandril ejects, because solenoid valve is subjected to the control of time circuit, solenoid valve just cuts out after opening certain hour automatically, at this moment, be full of water in the water vat of slow closing device, but do not had pressure.When owing to power failure or shutdown; valve plate can freely fall; the front end of valve plate drops on the push rod of slow closing device; the refluence water that valve plate can not close the mouth of a river at this moment fully; because refluence water makes valve plate push down push rod slowly presses down that to the pressure of valve plate the water in the water vat slowly releases from drain pipe; thereby finished the Slow Close process of this valve, overcome the destruction of water hammer effectively water pump and valve body.

Advantage of the present utility model is:

1. it is effective to eliminate water hammer.Under situation about having a power failure suddenly, can protect pipeline and water pump effectively.

2. simple, the little investment of equipment.Because having cancelled vacuum pumping device is water diversion apparatuss such as vacuum pumping pump, has saved pump house and taken up an area of and the equipment input.

3. convenient operating maintenance.Because adopt the electromagnetic valve slow closing device, therefore, the opening and closing of valve all can realize automatic control.

Fig. 1 is a general structure schematic representation of the present utility model.Comprising valve body 1, slow closing device 3, solenoid valve 4, water pump 5.

Fig. 2 is the structural representation of valve body part.Comprising the piston 3-1 in valve body 1, valve plate 2, the slow closing device 3, push rod 3-2, water vat 3-3, intake pipe 3-4, drain pipe 3-5.

Embodiment of the present utility model is as follows: valve body adopts the method for casting to have water intake through forming after the fine finishing, water outlet and the hole that slow closing device is installed, slow closing device comprises piston 3-1, push rod 3-2, water vat 3-3, intake pipe 3-4, drain pipe 3-5, water vat 3-3 is installed in the preformed hole of inlet end in the valve body, piston 3-1 is arranged in water vat 3-3, push rod 3-2 is fixed on the piston, and stretch out from the front end of water vat 3-3, the rear end of water vat 3-3 connects an intake pipe 3-4 and a drain pipe 3-5 respectively, the other end of drain pipe connects the sluicing SAS, intake pipe is connected with the water outlet branch of water pump by solenoid valve, solenoid valve regularly cuts out by timer, promptly start shooting after a period of time, close solenoid valve automatically by timer.The upper end of valve plate 2 is hinged on the upper end in the water intake, when valve plate was closed, whole valve plate should be able to cover the water intake part of valve body fully, and the bottom of valve plate can be covered on the push rod 3-2 of slow closing device, according to the above, just can form micro-resistance slowly-closed suction valve of the present utility model.

Claims

1. a micro-resistance slowly-closed suction valve is made up of valve body and control device branch, it is characterized in that this suction valve comprises valve body (1), valve plate (2), slow closing device (3), solenoid valve (4), slow closing device (3) is located at the bottom of water intake (1-1), the upper end of valve plate (2) is hinged on the top in the water intake (2-1), be respectively equipped with a drain pipe (3-5) and intake pipe (3-4) in the rear end of water vat, intake pipe (3-4) joins by the waterexit end of solenoid valve (4) with water pump (5).

2. micro-resistance slowly-closed suction valve according to claim 1 is characterized in that solenoid valve (4) connects timer, and the power end of timer and the power end of water pump join.