KR20190108388A - 3-Way electronic valve with the function of the high performance of flow rate - Google Patents

Abstract

The present invention relates to a three-way electronic valve which can control the flow amount of cooling water in a more precise manner as a way to solve the problem of low temperature corrosion which causes troubles in an engine of a vessel. To this end, the present invention is characterized by comprising: a body having an opening unit at an upper portion, and three ports provided along a side surface at 90 degrees; a bonnet coupled to the opening unit, and having a penetration hole vertically punched at a central area; an actuator mounter connected to an upper portion of the bonnet; an actuator installed at the actuator mounter; a stem inserted through the penetration hole, and having a lower end inserted into and supported with a lower end bush provided at the body, and an upper end to which an adapter is coupled to deliver driving force of the actuator; a rotor which is connected to the stem and located in the body to allow the ports to be opened and closed corresponding to a rotation angle, has a fan shape, and is provided with a stem insertion hole, into which the stem is inserted, at a tip portion, and a plurality of recessed packing grooves formed on an arc portion; an air branching pipe connected to an air supply line formed through the inside of the stem before being connected through a lower surface of the packing grooves; a packing coupled to the packing grooves, and having a recessed air groove formed at a lower surface, thereby being expanded after air supplied through the air branching pipe is supplied to the air groove; and a PID controller controlling the operation of the actuator such that the position of the rotor may be changed, thereby enabling a flow amount control with respect to the ports.

Description

Three-way solenoid valve with excellent flow control characteristics {3-Way electronic valve with the function of the high performance of flow rate}

The present invention is a technique for a three-way valve that can more accurately control the flow rate of the cooling water as a way to solve the low temperature corrosion that is a problem in the marine engine.

Applicable fluid in solenoid valves that open / close to control flow by measuring flow rate, pressure and temperature, interposed between flows of cold and hot water, steam gas, oil, refrigerant, various chemical fluids or sea water, etc. Depending on the flow of the valve, it is designed to have two-way valve or three-way valve shape to prevent water leakage and lower the pressure loss, thereby improving the life of the valve.

In such a solenoid valve, an actuator system for opening and closing the valve in accordance with the rising / falling rotation state of the valve spindle shaft by the rotational motion of the motor to control the opening value of the opening / closing operation for controlling the flow of the desired fluid. The solenoid valve actuator system is signal-coupled with an actuator control processing apparatus mounted on a separate printed circuit board (PCB) substrate, and has a one-chip microcomputer built-in digital control processing means or personal The central control processing system, such as a personal computer (PC), collects measurement values such as flow rate, pressure, and temperature, which are applied according to each sensing result from a storage tank of a desired fluid or various sensors installed on the fluid path. If the opening control data is transmitted on the basis of the collected measurement value, the actuator It receives the opening control data from the control processing unit receiving side and to determine the driving amount of the motor opens or closes the valve.

There are two main types of engines for large vessels: the MC (Man type Cam-shaft) engine and the ME (Man type Electronic) engine. In recent years, ship engines are being replaced by MC engines from ME engines due to minimizing pollutant emissions and improving economic efficiency.

In the case of the marine MC engine, which was popularized in early 2000, the engine load due to the acceleration and deceleration of the ship is constant, so that the temperature of the cylinder head, the center of the cylinder, and the lower part of the cylinder is constant, thereby changing the diameter of the cylinder liner considering the temperature The temperature inside the cylinder could be maintained at a constant level.

In the case of the ME engine, fuel efficiency is greatly improved by injecting fuel into the loading position according to the change in engine load, but steam is generated due to the temperature in the cylinder being inconsistent, and the low temperature corrosion that consumes the inside of the cylinder by reacting with sulfur in the exhaust gas. It is occurring.

The causes of low temperature corrosion are largely identified by temperature, pressure, moisture, and fuel.

Sulfur is a direct cause of low temperature corrosion, and MDO (Marine Diesel Oil), which is low in sulfur, is recommended, but the sulfur component is still used due to the economical use of HFO, which is more than twice the price of existing heavy fuel oil (HFO). It would be difficult to prevent cold corrosion by reducing the temperature.

Among the many factors of low temperature corrosion, the improved temperature system is the Load Dependent Cylinder Liner (LDCL) JWCS that installs two or more liners inside the engine cylinder and manages the liner temperature individually according to the load of the engine.

 The difference between the existing system and the Load Dependent Cylinder Liner (LDCL) JWCS is that there are at least two cylinder liners, and the valve and pump are used to individually control the temperature of the liner to prevent low temperature corrosion.

The three-way valve is the most important element in LDCL JWCS. Since the characteristic of the general three-way valve is the change of direction, it does not place much emphasis on the flow rate, but the valve is to control the temperature inside the cylinder through the amount of cooling water. For this purpose, the correct flow rate must come out with a linear value.

Republic of Korea Patent No. 10-0264220

Therefore, in the present invention, as a 3-way valve used in a ship engine, it is possible to prevent the low temperature corrosion by more precisely maintaining the temperature inside the cylinder by controlling the flow rate of the coolant by allowing precise flow rate control rather than simple direction control.

Three-way solenoid valve excellent flow control characteristics of the present invention for achieving the problem as described, the opening is formed in the top, the body is formed three ports while forming an angle of 90 degrees along the side; A bonnet coupled to the opening and having a through hole formed in the center thereof and formed in a vertical direction; An actuator mount connected to the bonnet; An actuator installed on the actuator mounting table; A stem inserted into the through hole, the lower end of which is inserted into and supported by a lower bushing provided in the body, and the upper end of which is coupled to an adapter for transmitting power of an actuator; Connected to the stem is located inside the body to open and close the ports according to the rotation angle, forming a fan shape and the stem insertion hole is inserted into the stem is formed, a plurality of arcs A rotor in which a recessed packing groove is formed; An air branch pipe connected to an air supply line formed through the inside of the stem and connected through a bottom of the packing groove; A packing coupled to the packing groove, the air groove recessed in a bottom surface thereof, so that the air supplied through the air branch pipe can be expanded by being supplied to the air groove; And a PID controller that controls the operation of the actuator so that the position of the rotor is changed to control the flow rate of the port.

Preferably, the through hole is coupled to the upper bush, the stem passes through the inner diameter portion of the upper bush, and the lower bush and the inner and outer diameter surfaces of the upper bush are characterized in that one or more O-rings are installed.

Preferably the rotor is a fan-shaped, the rotor in which the stem insertion opening is formed in the stem portion; And a sealing portion which is bent in an arc shape on the outer circumferential surface of the luther and has a packing groove formed on an outer surface thereof.

Preferably the luther is provided with a plurality of up and down spaced apart, the sealing portion is to be bent into an arc shape and then welded to the luter and characterized in that the dimensions through the surface cutting process.

Three-way solenoid valve with excellent flow control characteristics according to the present invention has the effect that it is possible to enable more accurate flow control by minimizing the leakage through the internal structure of the three-way valve.

In addition, by applying the three-way solenoid valve of the present invention capable of precise flow control to a ship engine, there is an effect that can help to prevent low temperature corrosion.

1 is a partial cross-sectional view of a three-way solenoid valve excellent in flow control characteristics according to an embodiment of the present invention.
2 is an enlarged cross-sectional view of the body in FIG.
3 is a plan sectional view of the body;
4 is a plan view of the rotor.
5 is a cross-sectional view of the rotor.
6 is a plan view of the luther.
7 is an exemplary view showing a principle that leakage occurs in a typical three-way valve.

Hereinafter, a three-way solenoid valve having excellent flow control characteristics according to the present invention will be described in more detail with reference to the accompanying drawings. However, the drawings and detailed description thereof will be described as one possible example according to the technical idea of the present invention, the technical protection scope of the present invention is not limited thereto.

1 is a partial cross-sectional view of a three-way solenoid valve excellent in flow control characteristics according to an embodiment of the present invention, Figure 2 is an enlarged cross-sectional view of the body in Figure 1, Figure 3 is a planar cross-sectional view of the body, Figure 4 5 is a plan view of the rotor, FIG. 5 is a sectional view of the rotor, FIG. 6 is a plan view of the rotor, and FIG. 7 is an exemplary view showing a principle of leakage in a general three-way valve.

As shown, the three-way solenoid valve having excellent flow control characteristics according to the present invention includes the body 100, the bonnet 200, the actuator mount 300, the actuator 400, the stem 500, the rotor. 600, an air distributor 700, a packing 800, and a PID controller (not shown).

An opening 110 is formed at an upper portion of the body 100, and three ports 120 are formed at an angle of 90 degrees along the side. The body is preferably made of castings.

One of the three ports 120 formed in the body 100 is an inlet port, and the other two are outlet ports. After the coolant flows through the inlet port, the coolant flows to either outlet port.

The bonnet 200 is coupled to the opening 110 formed at the upper side of the body 100, and a through hole 210 is formed in the center of the bonnet 200 to be perforated in the vertical direction.

The upper bushing 220 is coupled to the through hole 210, and the stem 500 to be described later is inserted through the inner diameter portion 221 of the upper bushing 220. In order to increase the watertightness of the upper bushing 220, one or more o-rings R may be placed along the inner and outer surfaces of the upper bushing 220. Since the stem 500 inserted into the inner diameter portion 221 of the upper bushing 220 is a portion that rotates, it is necessary to increase watertightness, and thus, the plurality of O-rings R may have the inner diameter portion 221 of the upper bushing 220. ), As well as to install a plurality of O-rings (R) in the outer diameter portion of the upper bushing 220 inscribed in the through-hole 210.

The actuator mount 300 is connected to the bonnet 200, and the actuator 400 is installed on the actuator mount 300.

Actuator 400 is an electronic actuator operated by the control of a PID controller (not shown) to adjust the rotation angle of the stem 500, flow direction and flow rate of the coolant by the rotor 600 connected to the stem 500 To control.

The temperature value of the temperature sensor (not shown) that measures the internal temperature of the engine is input by the PID controller.The PID controller rotates the stem and the rotor according to the set logic according to the changing temperature of the engine. To be controlled.

The stem 500 is an elongated shaft, is inserted into the body 100 through the actuator mount 300 and the bonnet 200, is installed upright, and is mounted to enable rotation.

Concave mounting groove 130 is formed in the bottom surface of the body 100, the lower bush 140 is inserted into the mounting groove 130, the inner diameter 141 of the lower bush 140 of the stem 500 The lower end is inserted into the supported state. O-ring (R) is preferably provided in the inner diameter portion 141 and the outer diameter portion of the lower bush 140 to be watertight.

The upper end of the stem 500 is coupled to the adapter 510 for transmitting the power of the actuator 400, the rotation force is transmitted through the adapter 510, the stem 500 is rotated in the forward or reverse direction.

An air supply line 520 is formed at the center of the stem 500, and the stem 500 may be in the form of a hollow shaft, and may supply compressed air from the outside through the air supply line 520.

One end of the air branch pipe 700 is connected to the outlet end 521 of the air supply line 520 formed in the stem 500, and the air branch pipe 700 is formed in the packing groove 600 which will be described later. The number of branches 602 is divided into a plurality so as to be connected through the bottom of each packing groove 602.

The compressed air supplied through the air supply line 520 and the air branch pipe 700 may be supplied to the packing groove 602, and the packing 800 installed in the packing groove 602 may be expanded by the compressed air. Can be. Specifically, the recessed air groove 810 is formed on the bottom of the packing 800, and when the compressed air is supplied to the air groove 810, the packing 800 is expanded. By supplying the air of high pressure to ensure that the packing 800 is expanded to ensure a tight seal can help to supply the correct flow rate.

The rotor 600 is provided inside the body 100, and the rotor 600 is connected to the stem 500 to rotate together with the stem 500. The opening and closing of the outlet port and the degree of opening and closing are determined according to the direction and the degree of rotation of the rotor 600.

The rotor 600 has a fan shape, and a stem insertion hole 601 into which the stem 500 is inserted is formed at the nipple portion, and a plurality of packing grooves 602 are formed at the arc portion, and the packing groove 602 is packed. 800 is configured to be coupled. As mentioned in the packing groove 602, the air branch pipe 700 is connected, and an air groove 810 is formed at the bottom of the packing 800 so that the high pressure air fills the air groove 810 and the packing 800 ) Expands.

More specifically, the rotor 600 may be largely composed of two parts, a luter 610 and a sealing portion 620. The rotor 610 has a fan shape and a stem insertion hole 601 is formed at the top of the rotor 600.

Preferably, the luther 610 is arranged such that two or more pieces of the same shape are arranged vertically at a spaced apart distance, and the sealing part 620 is bent in an arc shape with a metal material having a predetermined thickness and then the luther ( 610 to be welded to the outside.

In the present embodiment, the metal material of 10t thickness is bent to a predetermined shape and then welded to the luther 610, and the surface is cut to a thickness of about 9t. And the outer surface of the sealing portion 620 is processed to form a plurality of recessed packing grooves 602 to install the packing of the rubber material (800) in the packing grooves (602). Then, the air branch pipe 700 is connected to the packing groove 602.

In the present embodiment, the packing 800 is installed by forming the packing grooves 602 in three places in the vertical direction on the outer surface of the sealing part 620.

Meanwhile, in order to fix the rotor 600 to the outer surface of the stem 500, a screw hole 604 is formed at the rear end of the rotor 610 to the stem insertion hole 601 to use the screw 600 (not shown). ) May be fixedly connected to the stem 500.

Three-way solenoid valve excellent in flow control characteristics of the present invention having the configuration as described above can be precisely controlled by the PID control performed in the PID controller, and structurally spaced between the sealing portion of the rotor and the periphery of the outlet port This minimizes the leakage of the undesired outlet port, allowing more accurate flow control.

When a large gap between the inner surface of the rotor and the body, as shown in Figure 7 increases the amount of cooling water leaks, the more the amount of leakage, the more accurate flow control becomes impossible.

Therefore, as shown in the present invention, the gap between the rotor and the inner surface of the body is minimized so that unnecessary leakage does not occur, so that the flow control can be easily and more accurate.

In particular, the present invention is to allow the packing to be expanded more actively when necessary to minimize the gap between the inner surface of the rotor and the body.

In particular, the present invention can be utilized in industrial facilities or devices that require accurate flow control.

100: body
110: opening 120: port
130: mounting groove 140: lower bush
141: internal neck
200: bonnet
210: through hole 220: upper bush
221: internal neck
300: actuator mount
400: Actuator
500: stem
510: adapter 520: air supply line
521 exit
600: rotor
610: Luther 620: sealing part
601: stem insertion hole 602: packing groove
604: screw hole
R: O-ring
700: air branch pipe
800: packing 810: air groove

Claims (4)

An opening is formed in the upper portion, the body having three ports formed at an angle of 90 degrees along the side;
A bonnet coupled to the opening and having a through hole formed in the center thereof and formed in a vertical direction;
An actuator mount connected to the bonnet;
An actuator installed on the actuator mounting table;
A stem inserted into the through hole, the lower end of which is inserted into and supported by a lower bushing provided in the body, and the upper end of which is coupled to an adapter for transmitting power of an actuator;
Connected to the stem is located inside the body to open and close the ports according to the rotation angle, forming a fan shape and the stem insertion hole is inserted into the stem is formed, a plurality of arcs A rotor in which a recessed packing groove is formed;
An air branch pipe connected to an air supply line formed through the inside of the stem and connected through a bottom of the packing groove;
A packing coupled to the packing groove, the air groove recessed in a bottom surface thereof, so that the air supplied through the air branch pipe can be expanded by being supplied to the air groove;
And a PID controller for controlling the operation of the actuator to change the position of the rotor so as to control the flow rate of the port. The method of claim 1,
The upper bush is coupled to the through hole, the stem passes through the inner diameter of the upper bush,
Three-way solenoid valve with excellent flow control characteristics, characterized in that one or more O-ring is installed on the inner and outer surfaces of the lower bush and the upper bush. The method according to claim 1 or 2,
The rotor is,
A luther having a fan shape and having the stem insertion hole formed at the stem;
A three-way solenoid valve having excellent flow control characteristics, comprising: a sealing portion bent in an arc shape on the outer circumferential surface of the luter and the packing groove is formed on an outer surface thereof. The method of claim 3, wherein
The luther is provided with a plurality of up and down at a separation distance,
The three-way solenoid valve with excellent flow control characteristics, characterized in that the sealing portion is bent in an arc shape, and then welded to the luter and adjusted through surface cutting.

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