CN2384046Y

CN2384046Y - Flow controllable piston guide type electromagnetic valve

Info

Publication number: CN2384046Y
Application number: CN 99216093
Authority: CN
Inventors: 李汉宝
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-16
Filing date: 1999-07-16
Publication date: 2000-06-21
Anticipated expiration: 2009-07-16

Abstract

The utility model relates to a flow controllable piston pilot electromagnetic valve, which comprises a valve body, a valve cover, a piston valve clack, an electromagnetic pilot valve, a balanced loop and a discharge loop. The utility model is characterized in that the utility model is provided with two electromagnetic pilot valves, wherein, one electromagnetic pilot valve is positioned on the balanced loop, and the other electromagnetic pilot valve is positioned on the discharge loop; flow regulators are respectively arranged in the two loops; floating seal is arranged on a piston body. The utility model has the advantages of capability of eliminating the impact of a water hammer, capability of controlling the flow rate and the flow velocity of media and easy realization of automatic control; the utility model is suitable for being used as an automatic control executive device in the pipeline storage and transportation of petroleum, chemical industry, metallurgy, food, etc.

Description

A kind of piston guide electromagnetic valve of may command flow

The utility model relates to a kind of improved piston guide electromagnetic valve, belongs to the solenoid valve technical field.

In recent years, industry oil pipeline and storages such as domestic petroleum, chemical industry, metallurgy, food are carried out microcomputer automation control very big development, but lagged behind very much as the valve of control gear, and with international most advanced level very big gap was arranged.China's ZL97229181.4 patent disclosure a kind of piston guide electromagnetic valve by inventor's development, this kind solenoid valve is by being provided with art designs such as flow regulator and employing large size expanded letter piston in the equalizing orifice loop, the problem and the low difference of liquid level lower valve that efficiently solve the solenoid valve impact of water hammer open and close, the problem of sealing, but because it has only an electromagnetic priority valve, only control the logical of drain charge loop, disconnected, so the effectively Lift of control valve and the flow of pipeline medium in the opening and closing process of valve, flow velocity, in addition, in use also have in problems such as medium overshoot that causes because of pressure and change in flow and instability of flows, simultaneously, the supporting control degree of itself and automation is also lower.

The purpose of this utility model is to provide a kind of impact of water hammer little, and the piston guide electromagnetic valve of controllable valve Lift and flow.

The purpose of this utility model is achieved in that

A kind of piston guide electromagnetic valve of may command flow, it comprises the earial drainage loop of balanced loop, communication valve outlet port and the piston upper chamber of valve body, valve gap, piston flap, electromagnetic priority valve, the import of communication valve and piston upper chamber, its unique distinction is:

A. the quantity of described electromagnetic priority valve is two, and wherein, electromagnetic priority valve 6 is positioned on the balanced loop, and electromagnetic priority valve 7 is positioned on the earial drainage loop;

B. be provided with flow regulator 8 in the described balanced loop, described earial drainage is provided with flow regulator 9 in the loop;

The piston body of C. described piston flap is provided with floating seal, and floating seal is made up of piston ring 10 and some springs 11, in the uniform piston ring groove of spring and press on back of ring.

Above-mentioned solenoid valve, described valve outlet is provided with flowmeter 12, and flow transducer 13 is housed on the flowmeter.

Above-mentioned solenoid valve, described valve body bottom is provided with displacement transducer 14, the feeler lever contact piston flap of displacement transducer.

Above-mentioned solenoid valve, the quantity of described piston ring are 2, and the quantity of described each piston ring groove medi-spring is 10-20.

The utility model adopts two electromagnetic priority valves to control balance and earial drainage loop respectively, on balance and earial drainage loop flow regulator is set respectively, structural design such as floating seal is set on piston, make the utility model both can eliminate impact of water hammer, and can be by balance, the aperture of earial drainage circuit controls main valve and the speed that opens and closes, and easily be automated control, suit as the actuating device of the automatic control in the oil pipeline and storages such as oil, chemical industry, metallurgy, food.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the utility model structural representation.

Consult Fig. 1,1 is that valve body, 2 is that valve gap, 3 is the piston flap among the figure, equalizing orifice 4 and discharge orifice 5 spaces be arranged on valve gap two ends, and lead to the inlet/outlet passage of valve body respectively, equalizing orifice communicates with the hole 15 of piston upper chamber by electromagnetic priority valve 6, discharge orifice communicates with the hole 16 of piston upper chamber by electromagnetic priority valve 7, flow regulator 8 is positioned on the balanced loop, and flow regulator 9 is positioned on the earial drainage loop, and the adjusting screw rod head of two flow regulators is the needle-valve form; The piston of piston flap has adopted the piston of bigger effect area, and its area is 3-5 a times of valve port area, can open and close under the low difference of liquid level of 0.01MPA and reliable sealing; 2 piston rings 10 are positioned at the upper and lower of piston, the quantity of spring 11 is 16,16 springs are evenly distributed in 16 spring eyes of piston ring ring channel groove bottom, piston ring can contact with the sealing that piston hole keeps good under the spring force effect, piston ring adopts the good teflon material of self-lubricating property to make, and can further improve the sealability of piston ring; Flowmeter 12 is housed on the valve outlet port, flow transducer 13 is housed on the table, certainly, flowmeter and flow transducer also can be arranged in the pipeline; The displacement transducer of valve bottom is a Hall transducer.

During the utility model work, can be by the switching of computer control electromagnetic priority valve 6,7, during the energising of two electromagnetic priority valves, the equalizing orifice loop is closed, open in the discharge orifice loop, the piston upper chamber pressure release, piston stroking upward, main valve is opened, regulate the opening speed of flow regulator 8 may command main valves, make it steady unlatching; Otherwise, descent of piston, main valve is closed, and regulates the closing velocity of flow regulator 9 may command main valves, eliminates the impact of water hammer when closing; In main valve opening and closing process, can be with flow, the flow velocity signal of flow transducer induction, the flap position and the displacement signal of Hall transducer induction send computer to, machine sends corresponding signal after handling as calculated, control two electromagnetic priority valve switching electricity conditions, the hydraulic difference in the upper and lower chamber of piston is changed, thereby piston is controlled on the required Lift, realize control the pipeline medium flow; Because piston ring is spring floating sealing, have very high sealed precision, thus can be on required aperture with plunger lock, control media flow exactly, and can realize multistage unlatching and close.

In the utility model, valve body is materials such as magnesium iron, carbon steel, aluminum alloy, stainless steel, and piston can be materials such as aluminum alloy, copper, stainless steel, and piston sleeve is an anti-wearing liner, has reliable working life.

Claims

1. the piston guide electromagnetic valve of a may command flow, it comprises that the balanced loop of valve body, valve gap, piston flap, electromagnetic priority valve, the import of communication valve and piston upper chamber, the earial drainage loop of linking up valve outlet port and piston upper chamber is characterized in that:

A. the quantity of described electromagnetic priority valve is two, and wherein, electromagnetic priority valve [6] is positioned on the balanced loop, and electromagnetic priority valve [7] is positioned on the earial drainage loop;

B. be provided with flow regulator [8] in the described balanced loop, be provided with flow regulator [9] in the described earial drainage loop;

The piston body of C. described piston flap is provided with floating seal, and described floating seal is made up of piston ring [10] and some springs [11], in the uniform piston ring groove of spring and press on back of ring.

2. solenoid valve according to claim 1 is characterized in that, described valve outlet is provided with flowmeter [12], and flow transducer [13] is housed on the flowmeter.

3. solenoid valve according to claim 2 is characterized in that, described valve body bottom is provided with displacement transducer [14], the feeler lever contact piston flap of displacement transducer.

4. solenoid valve according to claim 3 is characterized in that, the quantity of described piston ring is 2, and the quantity of described each piston ring groove medi-spring is 10-20.