KR200276186Y1 - Automatic Valve Opening and Shutting Apparatus - Google Patents

Abstract

The present invention discloses an automatic valve opening and closing device for controlling the inflow and outflow of various fluids such as gas or liquid by automatic control.

The present invention provides a valve rod and an operation member having a first length at room temperature by a heating means and a shorter than the first length at a predetermined temperature or more in order to provide an automatic valve opening and closing apparatus using a shape memory member which does not need to supply state holding power. In the well-known thing which is made to slide by the shape memory member which becomes two lengths, the state maintenance for maintaining the state in which the shape memory member was deformed from the 1st length to the 2nd length, or the state deformed from the 2nd length to the 1st length was maintained. It was provided with a means.

As a result, the present invention eliminates the need to supply the operation holding power even in the operation switching state, which can greatly reduce the power consumption, and greatly reduce the metal fatigue of the shape memory member, thereby prolonging its life. It is effective to be.

Description

Automatic Valve Opening and Shutting Apparatus

The present invention relates to an automatic valve opening and closing device, and more particularly, to an automatic valve opening and closing device used to control the inflow and outflow of various fluids such as gas or liquid.

As is well known, when the handle is turned, the valve body at the lower end of the valve rod installed inside the valve box contacts the valve seat to block the flow path to block or separate the flow, thereby performing the opening / closing operation to free the outflow.

Since the opening and closing operation performed by manipulating the handle is difficult to meet the trend of automation, the operation of the handle uses various actuators.

A typical example of such an actuator is a solenoid, and a typical shape thereof is illustrated in FIG. 1.

So-called solenoid valves using such solenoids are also simply called solenoid valves. By moving the iron core by the excitation of the electromagnet built-in, the spool or the poppet is moved using the force, and the fluid introduced into the port 100 is transferred to the port ( It flows to the 200 or the flow is blocked, it is also exhausted to the port (300).

These solenoid valves are used only for blocking the flow and controlling the flow and can be used for various media such as water, oil and gas.

On the other hand, such a solenoid valve must use a bulky and heavy solenoid coil to generate a sufficient magnitude of magnetic force to move the spool or poppet, thereby increasing the volume and weight of the valve by almost two times. There is a problem that the cost will rise significantly.

Moreover, since the solenoid valve needs to be continuously supplied with power in order to maintain the open state, there is a problem that the power consumption increases as the open time increases.

In addition, a control valve of a method using a step motor is also used, and this example is shown in FIG.

As can be seen from the above, the method of using the step motor is to rotate the handle 301 of the valve 401 by a plurality of reduction gears 201 rotating by the driving force of the motor 101. .

Therefore, it can be conveniently used to open and close the valve 401 by the forward and reverse rotation of the motor 101, while the structure is complicated and bulky, power supply polarity switching circuit is required, etc. There is a problem that the manufacturing cost is significantly higher than the case of the solenoid valve.

Therefore, the present applicant has filed an automatic valve opening and closing device as Korean Patent Application No. 2000-5692 (name of the invention: valve opening and closing device).

According to this, as shown in Fig. 3, the valve body fixed to the lower end of the valve rod inside the valve box is secured to the valve seat while the closed state or the open state can be ensured. And a power supply circuit for causing thermoelastic martensite transformation to the shape memory alloy which is a shape memory member.

When the power is supplied, the valve is pulled upward while the shape memory member contracts, and the valve body is lifted up from the valve seat to open. When the power supply is interrupted, the shape memory member loses power and is deformed by a spring. The valve rod is moved downward so that the valve body is in close contact with the valve seat. Therefore, this has the advantage that the structure is dramatically simplified compared to the above-described solenoid valve or a valve using a step motor, and thus the volume and weight are significantly reduced, so that it can be miniaturized, the failure rate is low, and the manufacturing cost is low. The advantage is that it is inexpensive.

On the other hand, like the above-described solenoid valve, since it is necessary to supply the state maintaining power for the opening time, there is a problem in that the power consumption increases as the opening time is long, and thus there is a disadvantage of causing excessive power consumption, as well as shape memory The metal structure of the device may lead to premature fatigue and shorten the lifespan.

An object of the present invention is to provide an automatic valve opening and closing apparatus using a shape memory member that does not require the supply of state holding power to solve this problem.

1, 2 and 3 are explanatory views showing a conventional automatic valve opening and closing device.

Figure 4 is a cross-sectional view showing a valve open state according to the present invention.

Figure 5 is a cross-sectional view showing a state immediately before the valve is closed by the present invention.

Figure 6 is a cross-sectional view showing a closed state valve according to the present invention.

Figure 7 is a cross-sectional view showing a state just before the valve is opened by the present invention.

8 is an explanatory view showing another embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

1: valve housing

2: valve body

3: valve seat

4: valve rod

5: operating member

6: heating means

7: no shape memory

8: retaining pin

9: pin

10,11,12: spring

13: contact plate

14: fixed shaft

15: Pin Guide

16: Home

17: Stop home

18: switching element

19: power supply circuit

20: control circuit

The object of the present invention is to allow the valve body for opening and closing the flow path in the valve housing to perform the opening and closing operation while being folded with the valve seat by the lifting and lowering of the valve rod, the electric valve rod and the operation member is the first at room temperature by the heating means In the well-known thing which has a length and is made to slide by the shape memory member which becomes a 2nd length shorter than a 1st length above predetermined temperature, in the state or 2nd length in which the shape memory member was deformed from the 1st length to 2nd length, It is provided with the state holding means for holding the state deformed by the 1st length.

As a result, the present invention eliminates the need to supply the operation holding power even in the operation switching state, which can greatly reduce the power consumption, and greatly reduce the metal fatigue of the shape memory member, thereby prolonging its life. It is effective to be. This invention is described in detail according to the accompanying drawings as follows.

Figure 4 shows an automatic valve opening and closing apparatus according to the present invention.

As can be seen from this, the present invention allows the valve body 2 for opening and closing the flow path in the valve housing 1 to be folded with the valve seat 3 by lifting and lowering the valve rod 4 to perform the opening and closing operation. However, the electric valve rod 4 and the operating member 5 are provided by the heating means 6 to the shape memory member 7 having a first length at room temperature and a second length shorter than the first length at a predetermined temperature or more. In the known manner of sliding by means of the operation, the operation member 5 is adapted to maintain the shape memory member 7 deformed from the first length to the second length or from the second length to the first length. One side of the lower side is in contact with the upper end of the valve rod 4, the other side of the lower side of the operating member 5 is fixed to the fixed shaft 14 on one side of the valve housing 1, the pin above the operating member (5) (9) is formed to be fixed to the valve housing (1) by a fixing pin (8) The pin 9 of the operating member 5 is positioned in the guide groove 16 of the pin guide 15 elastically installed on the high spring 10, and the shape memory member 7 above the operating member 5. It is by fixing.

The present invention, as shown in Figure 4, the valve rod 4 is raised by the elasticity of the spring 11 before the start of operation at room temperature, accordingly the right side in the drawing of the operating member 5 is lifted The operation member 5 is rotated about the fixed shaft 14, and it is in the state which turned to the left side in drawing.

In this state, since the valve rod 4 is raised, the valve body 2 and the valve seat 3 at the lower end thereof are separated, so that a path from the inlet to the outlet is secured, and the fluid flows. At this time, the pin 9 of the operation member 5 reaches the left end of the guide groove 16 of the pin guide 15 in the drawing.

In this state, when the switching element 18 is turned on by a pulse supplied by the control circuit 20, a current supplied by the power supply circuit 19 flows to the switching element 18, and thus a predetermined current flows into the shape memory. It flows to the member 7. As shown in FIG. Therefore, since the electrical resistance exists, the shape memory member 7 generates heat in accordance with the flow of current, and the shape memory member 7 rises above a predetermined temperature due to such heat generation.

As a result, the shape memory member 7 causes martensite crystal transformation, which is a kind of phase transformation, to cause a shape change that becomes a second length shorter than the first length at the previous room temperature.

Accordingly, the shape memory member 7 pulls the upper end of the operation member 5 to the right in the drawing, and the operation member 5 is rotated to the right about the fixed shaft 14. Therefore, the lower right side of the operating member 5 pushes the valve rod 4 downward so that the spring 11 installed on the valve rod 4 overcomes the elasticity and the valve body 2 is strong against the valve seat 3. It is close to the pressure and this state is shown in FIG.

Accordingly, the path between the inlet and the outlet is interrupted. In this case, the shape memory member 7 is operated even after the valve body 2 contacts the valve seat 3 to block the flow path for reliable design. It is designed to pull the top of) to the right in the drawing. Therefore, the pin 9 is moved from the left end of the guide groove 16 of the pin guide 15 to the right according to the rotation of the operating member 5, and in this state, the pulse to which the control circuit 20 is supplied. Is stopped, and thus the switching device 18 is turned off.

Therefore, since the current supplied by the power supply circuit 19 is cut off and the current flowing in the shape memory member 7 is also cut off, the temperature of the shape memory member 7 returns to the normal temperature state.

As a result, the operation member 5 pulled by the tension of the shape memory member 7 is turned to the left side on the drawing about the fixed shaft 14 again by the elasticity of the spring 11. At this time, the pin 9 of the operating member 5 reaches the stop groove 17 formed in the middle of the right side of the pin guide 15 by the guide groove 16 of the pin guide 15, the spring 11 ) Is to apply the force to keep the operating member (5) to the left in the drawing, or by the shape of the bent stop groove 17 is no longer rotated and is in a stationary state, this state is shown in Figure 6 It was.

This state is to maintain the operation state that the flow path of the valve is blocked even without a separate power supply.

In this way, the valve is maintained in a closed state, and when the pulse is supplied again by the control circuit 20, the switching device 18 is turned on and the supply of power by the power supply circuit 19 is resumed. As a result, as described above, the shape memory member 7 generates heat and rises above a predetermined temperature, thereby pulling the upper end of the operating member 5 to the right in the drawing. At this time, the strength of the pulling force to the right is stronger than the elasticity of the spring 11, so that the operating member 5 rotates to the right in the drawing to move the pin 9 of the operating member 5 to the right. Accordingly, the pin 9 of the operation member 5 in the stop groove 17 of the pin guide 15 is moved to the lower end of the bent stop groove 17, which is illustrated in FIG. 7.

In this state, the control circuit 20 cuts off the supply of the pulse applied to the switching element 18 so that the current flowing in the shape memory member 7 is cut off, and thus the shape memory member 7 returns to room temperature again. Since it is to start to lift the operating member (5) by the elasticity of the spring (11), as shown in Figure 4 described above, the pin (9) is moved to the left end of the guide groove 16 of the pin guide (15) As the valve rod 4 is raised to separate the valve body 2 and the valve seat 3 at the lower end thereof, the inlet and the outlet communicate with each other so that a flow path is formed and the valve is opened.

As described above, this state is maintained until the current flows in the shape memory member 7 again.

In this way, the present invention is a state inverted from the open state to the closed state, from the closed state to the open state when the current flows to the shape memory member 7 by the control circuit 20, the state in each operating state No power supply is required for maintenance.

In addition, in the present invention, the depth of the guide groove 16 of the pin guide 15 is also different for each part and the highest part is the stop groove 17 part, the lowest part is the left end in the drawing, and the elastic member of the spring ( 5) The guide groove 16 of the pin guide 15 which is in close contact with the side is made to go deep in the clockwise direction so that the pin 9 is pulled out of the guide groove 16 as the guide is pulled out. It can move in the direction.

In addition, in the present invention, the pin guide 15 has a structure that is strongly pulled by the shape memory member 7 above and below the stop groove 17 of the guide groove 16. Therefore, if such a process is repeated, various components such as the shape memory member 7 and the operation member 5 may be damaged, which may shorten the life and reduce the reliability of the operation.

Therefore, in the present invention, a shock absorbing means including a spring 12 and a contact plate 13 is provided at a portion in contact with the upper end of the valve rod 4 below the operating member 5, so that the pin guide 15 and the pin 9 It is possible to minimize the damage of the parts while allowing the operation to be carried out correctly, this state is shown in FIG.

In addition, in the present invention, a shape memory alloy can be used as the shape memory member 7, and in fact, it can be applied as long as it causes various thermoelastic martensite transformation such as nickel-titanium alloy, copper-zinc-aluminum alloy, and the like. .

In addition, although the transistor is illustrated as the switching element 18 in the drawings of the present invention, various switching elements 18 such as other triacs, SCRs, and relays may be selectively used.

In addition, in the present invention, the control circuit 20 generates pulses for controlling various valves such as industrial or domestic valves, and in some cases, may be of a simple switch type.

In this way, the present invention can not only select the closed state and the open state of the valve arbitrarily, but the continuous power supply for maintaining the state in the closed state and the open state is unnecessary at all, thereby greatly reducing the power consumption. .

As described above, the present invention not only enables economic opening and closing operation, but also has a compact structure, which can reduce the failure rate, minimize the burden of manufacturing cost, and is suitable for miniaturization because it does not increase the volume as compared with a conventional opening and closing device. There is an effect such as.

Claims (4)

It is installed in the valve housing (1), the valve rod (4) for folding the lower and lower valve body 2 and the valve seat (3) to perform the opening and closing operation, and having a first length at room temperature and above the predetermined temperature The shape memory member 7 for rotating the operation member 5 which drives the electric valve rod 4 by the 2nd length shorter than 1 length, and the power supply apparatus for switching heat | fever to the shape memory member 7, and switching In the known structure composed of the elements 18, the shape memory member 7 is pinned upward to maintain the state deformed from the first length to the second length or the state deformed from the second length to the first length. (9) an automatic valve, characterized in that it comprises a pin guide (15) having an actuating member (5) to be formed and a guide groove (16) through which the pin (9) of the actuating member (5) moves. Switchgear The method of claim 1, The guide groove 16 of the pin guide 15 moves the pin 9 of the operating member 5 which rotates in accordance with the contraction of the stop groove 17 bent on one side and the shape memory member 7 in a predetermined direction. The depth of the guide groove 16 in one direction, the automatic valve opening and closing device characterized in that the pin guide 15 is in close contact with the operating member (5) by the spring (10). The method of claim 1, The operation member 5 is fixed to the valve housing 1 by the fixing pin 8, the lower side is located above the valve rod 4, the other side is fixed to the shape memory member 7 above Automatic valve opening and closing device characterized in that. The method of claim 1, An automatic valve opening and closing device, characterized in that a shock absorbing means having a spring (12) and a contact plate (13) is provided at a portion in contact with an upper end of a valve rod (4) below the operating member (5).