KR20090008486U - Pressure having switching function - Google Patents

Abstract

A pressure gauge serving as a switch is disclosed. The pressure gauge having a switch function according to an embodiment of the present invention has a body incorporating parts for measuring pressure, a dial indicating a pressure on the front of the body, and a pressure value by rotating according to the pressure measured by the parts. It is provided with an indicator hand to indicate. The pressure gauge having the switch function is coupled to the reed switch unit and the reed switch unit embedded in the body spaced apart from the rear surface of the dial by a predetermined distance from the rear end of the dial and a predetermined interval and the reed switch unit is It is provided with a rotating plate surrounding a portion of the body to move along the circumference of the dial. The reed switch unit includes a reed switch and a second magnet disposed to be spaced apart from the reed switch by a predetermined distance, the indicator needle moves and opens and closes the contact point of the reed switch by the first magnet. This maintains the contact of the reed switch.

Description

Pressure having switching function

The present invention relates to a pressure gauge that functions as a switch when a certain pressure is reached, and more particularly, to a pressure gauge that can be used to control a process by allowing a conventional pressure gauge to function as a switch using a reed switch.

The pressure gauge senses the pressure inside the system. A pressure gauge with a switch function is a device that can control the process by outputting an electrical signal when the pressure in the system exceeds or falls below the set pressure.

In particular, the pressure gauge with a switch function is used for various pressure control such as flow rate and pressure control hydraulic pressure, pneumatic pressure, hydraulic pressure, and the pressure gauge has a variety of functions and forms for various functions and special applications.

However, most of the pressure gauges that function as switches in the market are largely used as contact switches, and thus their utilization is low where a small pressure gauge is required. In addition, since the contact switch may spark when the switch is operated, the use of the explosion-proof area is extremely limited.

In addition, the contact switch has a short lifespan because it is oxidized as a spark occurs, in particular, because the operating characteristics of the switch is fixed before shipping the product, it is difficult for consumers to change the operating characteristics of the switch, there is a limitation in the utilization.

On the other hand, various types of pressure switches using a reed switch, an inductive or an optical method are used as a substitute for the contact switch, and among them, the reed switch is advantageous in that it can be implemented in a small size. However, even in the case of a pressure gauge using a conventional reed switch, even if the contact is maintained at the set pressure, if the set pressure exceeds or falls below, the contact point is insufficient to perform the process control of the equipment.

The technical problem to be achieved by the present invention is to provide a pressure gauge that can be used to control the process by having a switch function using a reed switch using two magnets.

The pressure gauge having a switch function according to an embodiment of the present invention for achieving the technical problem and the body and the dial to display the pressure on the front of the body and the parts measured by the parts It is provided with an indicator hand which rotates according to the pressure and instructs a pressure value.

The pressure gauge having the switch function is coupled to the reed switch unit and the reed switch unit embedded in the body spaced apart from the rear surface of the dial by a predetermined distance from the rear end of the dial and a predetermined interval and the reed switch unit is It is provided with a rotating plate surrounding a portion of the body to move along the circumference of the dial.

The reed switch unit includes a reed switch and a second magnet disposed to be spaced apart from the reed switch by a predetermined distance, the indicator needle moves and opens and closes the contact point of the reed switch by the first magnet. This maintains the contact of the reed switch.

The reed switch is a reed switch having a sealed structure filled with an inert gas. The reed switch includes two leads magnetized to the n pole and the s pole by the second magnet, respectively, and when the first magnet of the indicator needle passes, the magnetized leads and the first magnet of the first magnet are passed. The two leads are connected or separated from each other by repulsion or attraction due to polarity.

The second magnet has a weaker magnetic force than the first magnet. The reed switch unit may change an operating characteristic from normal open to normal close or vice versa by changing the polarity of the first magnet of the indicator hand.

The pressure gauge functioning as the switch further includes a power source and an LED lamp electrically connected to the reed switch unit, and when the contact of the reed switch is connected, the LED lamp is operated by the current generated from the external power source. The LED lamp is mounted on the rotating plate.

As described above, the pressure gauge having a switch function according to the present invention is (1) a pressure gauge according to an embodiment of the present invention, although it is difficult to manufacture a pressure gauge having a small and large switch function because the existing device uses a contact switch. Because of the small size of the reed switch and magnets can be manufactured in a small size has a wide range of applications.

(2) In addition, the touch switch used in the existing device is expensive, while the present invention can perform the same function as the low-cost device.

(3) Existing devices use contact switches, so that sparks occur when the switch is operated, which makes it impossible to use in explosion-proof areas. As the sealed reed switch is used, no spark is generated, so it can be used in explosion-proof area and its life is semi-permanent.

(4) In case of using existing inductive method or optical switch, additional power is needed, but this design can reduce installation cost because contact is driven without additional power.

(5) This design uses a latch type reed switch with a magnet inside the reed switch, so the contact is maintained even above the rated pressure, so it is suitable for process control. There is an advantage that can be easily identified.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the drawings.

Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1 is a view showing a pressure gauge functioning as a switch according to an embodiment of the present invention.

Referring to Figure 1, the pressure gauge 100 having a switch function according to an embodiment of the present invention is pressure on the body 10 and the front of the body (10) containing the parts (not shown) for measuring the pressure It is provided with a dial 40 for indicating and a pointer 20 to indicate the pressure value by rotating in accordance with the pressure measured by the parts.

The pressure gauge 100 having a switch function is equipped with a first magnet 30 at the lower end of the indicator needle 20, and a reed switch unit 50 embedded in the body 10 spaced apart from the rear face of the dial 40 by a predetermined interval. And a revolving plate 60 coupled to the reed switch unit 50 and surrounding a part of the body 10 so that the reed switch unit 50 can move along the circumference of the dial 40.

The reed switch unit 50 includes a reed switch (not shown) and a second magnet (not shown) spaced apart from the reed switch by a first magnet 30 while the indicator needle 20 moves. The contact of the reed switch is opened and closed, and the contact of the reed switch is held by the second magnet.

That is, when the indicator needle 20 rotates on the dial 40 of the pressure gauge 100 according to the measured pressure value, the first magnet 30 attached to the lower part of the indicator needle 20 also rotates together with the indicator needle 20. do. When the first magnet 30 reaches the point of the reed switch unit 50 located at the preset pressure value, the contact of the reed switch (not shown) of the reed switch unit 50 is connected.

Meanwhile, in the related art, when the indicator needle 20 exceeds the reed switch unit 50, the contact point of the reed switch (not shown) of the reed switch unit 50 is dropped again, but in one embodiment of the present invention, the reed switch (not shown) When the contact is connected to the second magnet is provided in the reed switch unit 50 so that the connection state can be maintained continuously. This allows the contacts of the reed switch to be continuously maintained, so that the process can be efficiently controlled by outputting electrical signals or displaying other signals.

In addition, even after the pressure gauge 100 of the present invention is installed in the workplace, the user changes the polarity of the first magnet 30 so that the operating characteristics of the normal open and the normal close of the reed switch are desired. You can change it.

FIG. 2 (a) is a view showing the outer shape of the reed switch of the reed switch unit of FIG. 1, and FIG. 2 (b) is a view illustrating the structure of the reed switch unit of FIG.

3 is a circuit diagram illustrating a reed switch unit of FIG. 1.

2 and 3, the reed switch unit 50 includes a reed switch 55 and a second magnet 54. The reed switch 55 has a structure in which an inert gas 53 and two elongated leads 52 are enclosed in an insulated glass tube 51. When the magnet approaches the leads 52, the leads In the 52, N, S poles are generated by the magnets, sucked together, and are attached to each other.

Meanwhile, in one embodiment of the present invention, a reed switch having a sealed structure filled with an inert gas is used, but may be implemented as another type of reed switch.

When the indicator needle 20 rotates and reaches the point where the reed switch unit 50 is located, the leads 52 are attached by the first magnet 30 mounted at the lower end of the indicator needle 20.

However, as mentioned above, when the first magnet 30 is out of the vicinity of the reed switch unit 50, the contact is no longer maintained by the first magnet 30. At this time, since the second magnet 54 provided in the reed switch unit 50 maintains the leads 52 continuously, the reed switch 55 maintains the connection of the leads 52 and maintains process control. I can do it efficiently.

Meanwhile, the pressure gauge 100 having a switch function further includes a power source 73 and an LED lamp 70 electrically connected in series with the reed switch unit 50. When the contact of the reed switch 55 is connected, the LED lamp 70 is operated by the current generated from the external power source (73). The LED lamp 70 is mounted on the rotating plate 60.

Looking at the circuit diagram of Figure 3, the LED lamp 70 is connected in series between the power supply 73 and the reed switch unit 50 as shown in the figure. Therefore, when the reed switch 55 is continuously maintained, the power is supplied to the LED lamp 70 and the LED lamp 70 is turned on as shown in FIG. 3. Through this, it can be confirmed in the workplace that the pressure gauge 100 of the present invention is operating.

In the present invention, the LED lamp 70 is used, but in addition to the LED lamp 70, a sound device capable of emitting a warning sound may be attached.

As shown in FIG. 3, when the leads 52 are connected when the power source 70 is used, a current generated from the power source 70 flows to the outside through the external magnetic leads 56 to perform a process using an electrical signal. Can be controlled.

4 is a conceptual view for explaining the operation of the reed switch unit in detail.

For convenience of description, only two leads 52-1 and 52-2, the second magnet 54 and the first magnet 30 of the reed switch 55 are shown in FIG. 4.

First, the two leads 52-1 and 52-2 of the reed switch 55 are magnetized to the N pole and the S pole by the second magnet 54, respectively. That is, although the magnetic force of the second magnet 54 is weaker than that of the first magnet 30, the lead that is close to itself among the leads 52-1 and 52-2 may be magnetized with its polarity. (See FIG. 4 (1), the lead 52-1 is magnetized to the N pole and the lead 52-2 is magnetized by the second magnet 54.)

Although each of the leads 52-1 and 52-2 is magnetized to the north pole and the south pole, the magnetic force is not strong enough to attract the two leads 52-1 and 52-2 to each other. (52-1, 52-2) remain separated.

In this state, when the first magnet 30 of the indicator needle 20 moves and passes over the reed switch 55, the N pole of the first magnet 30 is magnetized to the N pole. The lead 52-1 pushed by the magnetic force and magnetized to the N pole is attached to the lead 52-2 magnetized to the S pole (see (2) in FIG. 4).

Even after the first magnet 30 passes the reed switch 55, the leads 52-1 and 52-2 remain connected to each other.

After the first magnet 30 moves in the first movement direction 2 and the leads 52-1 and 52-2 are attached, the first magnet 30 is used to separate the leads 52-1 and 52-2 again. Move (30) in the opposite direction (3) to the first movement direction (2).

Then, the leads 52-2 are magnetized to the N pole by the first magnet 30 having a strong magnetic force, and the leads 52-1 are also the N poles. -2) is separated.

In FIG. 4, the two leads 52-1 and 52-2 of the reed switch 55 are first separated, and then the normal opening, which is an operating characteristic connected by the movement of the indicator needle 20, is shown. The case is explained.

However, the pressure gauge 100 according to the embodiment of the present invention operates from normal open to normal close or vice versa by changing the polarity of the first magnet 30 of the indicator needle 20. Can change characteristics.

That is, when the two leads 52-1 and 52-2 are initially attached to each other, only the first magnet 30 is changed in polarity to move the leads 52-1 and 52-2. This behavior is an operating characteristic of normal close.

5 is an internal structural diagram of a pressure gauge for explaining the operation of the pressure gauge.

The pressure gauge 100 accumulates the indicator needle 20 together with the pinion 110 at the center of the body 10, and accumulates the electric gear 185 of the fan shape to occupy the pinion 110. The expansion pipe 180 is connected to the electric gear 185 by the operation pipe 190 therein, and attaches the dial 40 indicating the pressure to the front surface of the body 10.

When the expansion tube is expanded by pressure, the indicator needle 20 rotates by the action of the electric gear 185 to indicate the pressure.

The pressure gauge 100 according to the embodiment of the present invention may be used as a pressure gauge functioning as a switch when a process control is necessary while simply using as a pressure gauge to instruct pressure in normal times. That is, while the indicator needle 20 rotates, the reed switch 55 of the reed switch unit 50 is opened and closed by the first magnet 30, and the contact of the reed switch 55 is opened by the second magnet 54. It is possible to maintain pressure control conditions as described above.

In addition, the LED lamp 70 is provided between the power source 73 and the reed switch unit 50. When the reed switch 50 maintains the contact point, the power is supplied to the LED lamp 70 and the LED lamp 70 The light will come on. Through this, it can be confirmed in the workplace that the pressure gauge 100 of the present invention is easily operated.

Although the embodiment of the present invention has been described with respect to a pressure gauge performing a switch function, the switch function is also used for various measuring devices such as a thermometer by using the first magnet 30, the second magnet 54 and the reed switch 55. Can be added.

As described above, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

A brief description of each drawing is provided to more fully understand the drawings, which are incorporated in the detailed description of the invention.

1 is a view showing a pressure gauge functioning as a switch according to an embodiment of the present invention.

FIG. 2 (a) is a diagram illustrating the external shape of the reed switch of the reed switch unit of FIG. 1, and FIG. 2 (b) is a diagram illustrating the structure of the reed switch unit of FIG.

3 is a circuit diagram illustrating a reed switch unit of FIG. 1.

4 is a conceptual view for explaining the operation of the reed switch unit in detail.

5 is an internal structural diagram of a pressure gauge for explaining the operation of the pressure gauge.

Claims (6)

A pressure gauge having a switch function having a body incorporating the pressure measuring parts, a dial for indicating the pressure on the front of the body, and an indicator hand for indicating a pressure value by rotating in accordance with the pressure measured by the parts. In The first magnet is mounted to the lower end of the indicator needle, A revolving plate coupled to the reed switch unit embedded in the body and spaced apart from the rear surface of the dial and the reed switch unit and surrounding a part of the body so that the reed switch unit can move along the circumference of the dial; The reed switch unit, And a reed switch and a second magnet disposed to be spaced apart from the reed switch by a predetermined distance, the indicator hand moves to open and close the contact of the reed switch by the first magnet, and the reed switch by the second magnet. Pressure gauge having a switch function, characterized in that the contact of the holding. The method of claim 1, wherein the reed switch, Pressure gauge having a switch function, characterized in that the reed switch of the sealed structure filled with an inert gas. The method of claim 1, wherein the reed switch, Two leads magnetized to the n pole and the s pole by the second magnet, respectively, and when the first magnet of the indicator needle passes, repulsion caused by the polarization of the two magnetized leads and the first magnet or A pressure gauge with a switch function, characterized in that the two leads are connected or separated from each other by a pull. The method of claim 1, wherein the second magnet, Pressure gauge having a switch function, characterized in that the magnetic force is weaker than the first magnet. The method of claim 1, wherein the reed switch unit, A pressure gauge with a switch function, characterized in that the operating characteristic can be changed from normal open to normal close or vice versa by changing the polarity of the first magnet of the indicator hand. The method of claim 1, And a power supply and an LED lamp electrically connected to the reed switch unit in series. When the contact of the reed switch is connected, the LED lamp is operated by the current generated from the external power source, The LED lamp is a pressure gauge having a switch function, characterized in that mounted on the top of the rotating plate.

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