KR20240020564A - Valve apparatus and interlock system controlling the same - Google Patents

Abstract

The present invention relates to a valve device and an interlock system for controlling the same, comprising: a valve rotatably provided to open and close a pipe for injecting and discharging gas for a gas insulated switchgear; a shaft extending along the rotation axis of the valve; and an actuator that rotates the shaft, thereby preventing the pipe from being unintentionally opened or closed due to operator error.

Description

Valve device and interlock system controlling the same {VALVE APPARATUS AND INTERLOCK SYSTEM CONTROLLING THE SAME}

The present invention relates to a valve device and an interlock system that controls the same, and more specifically, to a valve device that opens and closes a pipe for injecting and discharging gas into a gas insulated switchgear and an interlock system that controls the same.

In general, gas insulated switchgear is the main protection device of power facilities installed in power plants or substations. It is a device that protects the power system by quickly blocking excessive current not only during normal switching but also in the event of a fault. Circuit breakers, disconnectors, busbars, cable heads, etc. are built into a metal container filled with the same high-insulating gas and grounded.

In addition, the gas insulated switchgear includes a pipe for discharging and injecting gas during operations such as expansion work and inspection of the gas insulated switchgear, and a valve device for opening and closing the pipe.

Figure 1 is a perspective view showing a conventional valve device.

Referring to the attached FIG. 1, the conventional valve device 20 is a valve (not shown) rotatably provided in the pipe 10 to open and close the pipe 10 for injecting and discharging gas for a gas insulated switchgear. ), a shaft 24 extending to the outside of the conduit 10 along the rotation axis of the valve (not shown), and a handle 26 fastened to the shaft 24.

In the conventional valve device 20 according to this configuration, the handle 26 is held and rotated by the operator, the shaft 24 is rotated by the handle 26, and the valve (not shown) By being rotated by the shaft 24, the conduit 10 is opened and closed.

However, in this conventional valve device 20, the valve device 20 that opens and closes the pipe 10 for injecting and discharging gas into the gas insulated switch device is manually operated by the operator, resulting in operator error. There was a problem in that the pipe 10 was opened or closed unexpectedly due to manipulation. That is, cases often occur where the conduit 10 should be open but is closed, or where the conduit 10 should be closed but is open. In particular, when the pipe 10 is supposed to be closed but is opened, gas leaks to the outside of the gas insulated switchgear, causing insulation breakdown and a power outage at a power plant or substation.

Republic of Korea Patent Publication No. 10-2021-0030036

Therefore, the present invention provides a valve device that can prevent a pipe for injecting and discharging gas into a gas insulated switchgear from being unintentionally opened or closed due to operator misoperation, and an interlock system that controls the same. The purpose.

The present invention, in order to achieve the above-described object, includes a valve rotatably provided to open and close a pipe for injecting and discharging gas for a gas insulated switchgear; a shaft extending along the rotation axis of the valve; and an actuator that rotates the shaft.

The actuator may include a motor that generates power and a power transmission mechanism that transmits power from the motor to the shaft.

The power transmission mechanism may include a first gear fastened to the drive shaft of the motor and a second gear fastened to the shaft and meshed with the first gear.

The first gear may be formed to have a reduction ratio of 128:1.

The second gear may be formed to have a reduction ratio of 2:1.

The actuator may further include a sensing plate that rotates together with the second gear and a sensor that detects the rotation direction and angle of the sensing plate.

The sensing plate may include a plurality of protrusions that protrude outwardly in the radial direction of the sensing plate and are spaced apart from each other in the circumferential direction of the sensing plate, and a plurality of slots interposed between the plurality of protrusions.

The sensor includes a first sensor and a second sensor disposed to be spaced apart from each other in the circumferential direction of the sensing plate, and the first sensor detects one of the plurality of protrusions and the plurality of slots facing the first sensor, and , the second sensor detects which of the plurality of protrusions and the plurality of slots is opposed to the second sensor at a position spaced apart from the first sensor, and the rotation direction and rotation angle of the sensing plate are those of the first sensor. It may be detected from the detection value and the detection value of the second sensor.

The actuator rotates together with the second gear and may further include a status display wheel that displays the opening amount of the pipe.

The status display wheel may be configured to continuously display the opening amount of the pipe.

The status display wheel includes a shape extending in a circumferential direction of the status display wheel, and the width of the shape measured in the axial direction of the status display wheel increases or decreases in one direction of the circumference of the status display wheel. can be formed.

The shape may be colored in different colors depending on the type of valve.

The status display wheel may further include characters indicating the opening amount of the pipe, respectively, at one end and the other end of the figure in the circumferential direction of the status display wheel.

The actuator may be configured to operate automatically by a predetermined program.

The actuator may further include a switch for switching between automatic and manual operation.

The actuator may be formed to be detachable from the conduit.

The actuator may be mounted in an extension direction of the shaft.

Additionally, the present invention provides an interlock system that controls the valve device to close the pipeline when the valve device should close the pipeline but is in an open state.

The valve device should close the pipeline, but it is in an open state, so when the valve device closes the pipeline, the valve device can be controlled so that it cannot be operated manually.

When the valve device should close the pipe but is in an open state, at least one of a warning sound, a warning light, and a position output of the pipe may be output.

The valve device and the interlock system for controlling the same according to the present invention include a valve rotatably provided to open and close a pipe for injecting and discharging gas for a gas insulated switchgear; a shaft extending along the rotation axis of the valve; and an actuator that rotates the shaft, thereby preventing the pipe from being unintentionally opened or closed due to operator error.

1 is a perspective view showing a conventional valve device;
Figure 2 is a front view showing valve devices and an interlock system for controlling them according to an embodiment of the present invention;
Figure 3 is a rear view of Figure 2;
Figure 4 is an exploded perspective view showing a normally open valve device among the valve devices of Figure 2;
Figure 5 is a perspective view showing the internal structure of the normally open valve device of Figure 4 in an assembled state;
Figure 6 is a perspective view showing the internal structure of the normally open valve device of Figure 5 in a displaced state;
Figure 7 is a perspective view showing the sensor and sensing plate of Figures 4 to 6;
Figure 8 is a perspective view showing the internal structure of a normally closed valve device among the valve devices of Figure 2;
Figure 9 is a perspective view showing the internal structure of the normally closed valve device of Figure 7 in a displaced state.

Hereinafter, the valve device according to the present invention and the interlock system that controls the same will be described in detail with reference to the attached drawings.

FIG. 2 is a front view showing valve devices and an interlock system for controlling the same according to an embodiment of the present invention, FIG. 3 is a rear view of FIG. 2, and FIG. 4 is a normally open valve device among the valve devices of FIG. 2. It is an exploded perspective view showing, Figure 5 is a perspective view showing the internal structure of the normally open valve device of Figure 4 in an assembled state, and Figure 6 is a perspective view showing the internal structure of the normally open valve device of Figure 5 in a displaced state. It is a perspective view, FIG. 7 is a perspective view showing the sensor and sensing plate of FIGS. 4 to 6, FIG. 8 is a perspective view showing the internal structure of the normally closed valve device among the valve devices of FIG. 2, and FIG. 9 is FIG. 7. This is a perspective view showing the internal structure of the normally closed valve device in a displaced state.

Referring to the attached FIGS. 2 and 3, the interlock system according to an embodiment of the present invention includes a valve device 200 for opening and closing a pipe 10 for injecting and discharging gas for a gas insulated switchgear, and the valve device It may include an intelligent electronic device 300 (IED: Intelligent Electronic Device) that controls 200 .

The valve device 200 completely opens the conduit 10 when a valve (not shown), which will be described later, is in the first position (see FIG. 5) and completely closes the conduit 10 when it is in the second position (see FIG. Refer to 6) When the normally open valve device 210 and a valve (not shown) to be described later are in the first position, the conduit 10 is completely closed (see FIG. 8), and when in the second position, the conduit 10 is closed. It may include a normally closed valve device 220 that fully opens (see FIG. 9).

4 to 7, the normally open valve device 210 includes a valve (not shown) rotatably provided inside the pipe 10 and a valve (not shown) along the rotation axis of the pipe (not shown). 10) may include a shaft 24 extending to the outside and an actuator 216 that rotates the shaft 24.

The valve (not shown) may be, for example, a so-called ball valve that is formed in the shape of a sphere with a hole, rotates within a 90-degree angle range, and the hole adjusts the opening amount of the flow path.

The shaft 24 may include a tip portion having a polygonal cross-section to prevent it from spinning around the second gear 216d, which will be described later.

The actuator 216 may include a motor 216a that generates power and a power transmission mechanism 216b that transmits power from the motor 216a to the shaft 24.

The motor 216a may be formed as a direct current (DC) motor, for example, and may include a stator, a rotor rotated by interaction with the stator, and a drive shaft extending along the rotation axis of the rotor.

The power transmission mechanism 216b may include a first gear 216c fastened to the drive shaft and a second gear 216d fastened to the shaft 24 and meshed with the first gear 216c.

The first gear 216c and the second gear 216d may be formed as spur gears with a total reduction ratio of 256:1 so that sufficient torque is applied to the shaft 24. That is, the first gear 216c may be formed to have a reduction ratio of 128:1, and the second gear 216d may be formed to have a reduction ratio of 2:1.

Here, the motor 216a is basically configured to operate automatically by being controlled by a predetermined program mounted on the intelligent electronic device 300. In this case, it is necessary to determine the phase of the valve (not shown), To this end, the actuator 216 may further include a sensing plate 216e that rotates with the second gear 216d and a sensor 216f that detects the rotation direction and angle of the sensing plate 216e. .

The sensing plate 216e is formed in a substantially fan-shaped plate shape, protrudes outward in the radial direction of the sensing plate 216e from the arc portion of the sensing plate 216e, and are spaced apart from each other in the circumferential direction of the sensing plate 216e. It may include a plurality of protrusions 216ea and a plurality of slots 216eb interposed between the plurality of protrusions 216ea.

The sensor 216f may be formed to indirectly detect the phase of the valve (not shown) by detecting the rotation direction and rotation angle of the sensing plate 216e.

Specifically, the sensor 216f includes a first sensor 216fa and a second sensor 216fb arranged to be spaced apart from each other in the circumferential direction of the sensing plate 216e, and the first sensor 216fa is the Among the plurality of protrusions 216ea and the plurality of slots 216eb, the one opposing the first sensor 216fa is detected, and the second sensor 216fb is positioned at a position spaced apart from the first sensor 216fa. Among the plurality of protrusions 216ea and the plurality of slots 216eb, the one opposing the second sensor 216fb is detected, and the detection value of the first sensor 216fa and the detection value of the second sensor 216fb are detected. It can be formed to detect the rotation direction and rotation angle of the sensing plate 216e.

Here, in the case of this embodiment, considering that the valve (not shown) is formed as a ball valve rotated within a 90-degree angle range, the plurality of protrusions 216ea are formed in seven, and the plurality of slots ( 216eb) is formed in 6 pieces, and 7 protrusions 216ea and 6 slots 216eb may be formed at intervals of 15 degrees along the circumferential direction of the sensing plate 216e. Additionally, the first sensor 216fa and the second sensor 216fb may be arranged at 90-degree intervals in the circumferential direction of the sensing plate 216e.

On the other hand, the actuator 216 allows the operator to switch the control method of the motor 216a from automatic to manual during work such as expansion work and inspection of the gas insulated switchgear, and when the work is completed, the motor ( It may further include a switch 216g that allows the control method of 216a) to be changed from the manual method to the automatic method.

Here, the actuator 216 further includes a housing 216h that supports the motor 216a and accommodates the power transmission mechanism 216b, the sensing plate 216e, and the sensor 216f, The switch 216g may be formed to be exposed to one side of the housing 216h.

Meanwhile, so that the operator can accurately determine the phase of the valve (not shown), the actuator 216 rotates together with the second gear 216d and includes a status display wheel that displays the opening amount of the pipe 10. It further includes (216i), and the housing (216h) may include a window (216ha) for exposing the status display wheel (216i).

The status display wheel 216i may be formed to continuously display the opening amount of the pipe 10.

Specifically, the status display wheel 216i is formed as a substantially fan-shaped member, and a figure 216ia extending in the circumferential direction of the status display wheel 216i may be formed on the outer peripheral surface of the status display wheel 216i. there is.

In addition, the shape 216ia has a width (distance measured in the axial direction of the status display wheel 216i) of the shape 216ia in one direction (counterclockwise in FIG. 5) of the circumferential direction of the status display wheel 216i. direction), it can be formed to increase.

In addition, the window 216ha does not show the entire figure 216ia at once, but when the status display wheel 216i is rotated, the window 216ha displays the figure 216ia corresponding to the opening amount of the conduit 10. It can be configured to show only the part to the operator.

Here, the window 216ha may include a mark (for example, an arrow) designating a portion of the figure 216ia corresponding to the opening amount of the pipe 10.

In addition, the status display wheel 216i has letters 216ib and 216ic indicating the opening amount of the pipe 10, respectively, at one end and the other end of the figure 216ia in the circumferential direction of the status display wheel 216i. ) may further be included. That is, as shown in FIGS. 5 and 6, a 'closed' character 216ic may be displayed at the left end of the figure 216ia and an 'open' character 216ib may be displayed at the right end.

And, the figure 216ia may be colored green, for example.

Meanwhile, the housing 216h is detachable from the conduit 10 to reduce the time and cost required to replace the existing valve device 20 with the valve device 200 of this embodiment. can be formed. That is, the housing 216h is formed of a plurality of pieces as shown in FIG. 4, and the handle 26 is removed from the conventional valve device 20, and the handle 26 is removed from the conventional valve device ( By assembling the plurality of pieces in the conduit 10 where 20) was installed, the actuator 216 can be easily installed in the existing conduit 10.

Here, so that the actuator 216 does not interfere with other structures of the gas insulated switchgear, the actuator 216 is mounted to protrude in the extending direction of the shaft 24 (radial direction of the conduit 10). This may be desirable.

The normally closed valve device 220 may be formed similarly to the normally open valve device 210.

However, as shown in FIGS. 8 and 9, the normally closed valve device 220 may have a status display wheel 226i formed differently from the normally open valve device 210.

That is, the shape 226ia formed on the status display wheel 226i of the normally closed valve device 220 has a width of the shape 226ia in one direction (in FIG. 9) of the circumferential direction of the status display wheel 226i. It can be formed to decrease in a counterclockwise direction.

And, the figure 226ia may be colored, for example, in red.

Here, the 'closed' character 226ic and the 'open' character 226ib are also displayed on the status display wheel 226i of the normally closed valve device 220, and like the open valve device 200, the 'closed' character is displayed. The ' character 226c may be displayed at the left end of the figure 226ia and the 'open' character 226ib may be displayed at the right end of the figure 226ia.

The intelligent electronic device 300 may be configured to close the conduit 10 when the valve device 200 should close the conduit 10 but is in an open state.

And, when the intelligent electronic device 300 controls the valve device 200 to close the pipe 10 because the valve device 200 should close the pipe 10 but is in an open state, The valve device 200 may be configured so that it cannot be operated manually. That is, the intelligent electronic device 300 may be configured to not allow the operator to manually switch the valve device 200 by manipulating the switch 216g.

In addition, when the valve device 200 should close the pipe 10 but is in an open state, the intelligent electronic device 300 generates a warning sound, operates a warning light, and detects the pipe 10 in which a problem has occurred. It can be configured to output the location of .

Here, in this embodiment, the intelligent electronic device 300 generates a warning sound, turns on a warning light, and outputs a location, but is not limited to this. That is, one or two of a warning sound, warning light, and location output may be implemented.

Hereinafter, the operational effects of the valve device 200 and the interlock system that controls it according to this embodiment will be described.

That is, when performing work such as expansion work or inspection of the gas insulated switchgear, the operator manually switches the operation method of the actuator 216 through the switch 216g and operates the valve (not shown) to operate the valve (not shown). By opening the pipe 10, the gas inside the gas insulated switchgear can be discharged.

Then, after the worker performs the necessary work, gas is filled inside the gas insulated switchgear, the valve (not shown) is operated to close the pipe 10, and the actuator 216 is operated through the switch 216g. ) operation method can be automatically restored.

Here, the valve device 200 and the interlock system for controlling the same according to this embodiment include the actuator 216 controlled by the intelligent electronic device 300. The operational reliability of the valve device 200 can be improved.

And, as the actuator 216 includes the sensing plate 216e and the sensor 216f, automatic control of the valve device 200 may be possible.

In addition, since the switch 216g is provided so that the valve device 200 can be switched between an automatic operation method and a manual operation method, the operator can easily operate the valve device 200, thereby improving work efficiency. It can be improved.

In addition, the intelligent electronic device 300 is configured to control the valve device 200 to close the pipeline 10 when the intelligent electronic device 300 should close the pipeline 10 but is in an open state. Accordingly, the pipe 10 can be prevented from opening or closing unintentionally due to operator error. That is, when the operator does not close the pipe 10 again after opening it, the intelligent electronic device 300 transmits an operation signal to the actuator 216 to forcibly operate the valve (not shown) The pipe 10 can be closed. Accordingly, it is possible to prevent gas from leaking to the outside of the gas insulated switchgear, causing insulation breakdown and a power outage at a power plant or substation.

In addition, when the valve device 200 is forcibly operated by the intelligent electronic device 300, the valve device 200 is controlled so that it cannot be operated manually, making it more reliable to prevent problems due to operator misoperation. It can be prevented.

Also, when the intelligent electronic device 300 forcibly operates the valve device 200, it generates a warning sound and a warning light, allowing workers and managers to quickly recognize the occurrence of a problem and take action.

In addition, when the intelligent electronic device 300 generates a warning sound and a warning light, it outputs the location of the area where the problem occurred, allowing the recovery team to easily find the site and quickly restore it.

In addition, as the valve device 200 includes the status display wheels 216i and 226i, the possibility of erroneous operation by the operator is significantly reduced, and the above-mentioned accident can be prevented in advance.

In addition, as the status display wheels 216i and 226i include figures 216ia and 226ia whose width is continuously variable, the operator can determine the position of the valve (not shown) and the opening amount of the conduit 10. You can easily and accurately determine the status. Thereby, the possibility of erroneous operation by the operator can be further reduced.

And, depending on the type of the valve (not shown), that is, whether it is the normally open valve device 210 or the normally closed valve device 220, as the figures 216ia and 226ia have different colors, The possibility of operator misjudgment and misoperation can be further reduced.

In addition, as the status display wheels 216i and 226i further include the characters 216ib, 216ic, 226ib, and 226ic indicating the opening amount of the pipe 10, the possibility of operator misjudgment and misoperation is further reduced. It can be.

10: Pipeline
24: shaft
200: valve device
216: actuator
216a: motor
216b: Power transmission mechanism
216c: first gear
216d: second gear
216e: sensing plate
216ea: protrusion
216eb: slot
216f: sensor
216fa: first sensor
216fb: second sensor
216g: switch
216i, 226i: The above status display wheel
216ia, 226ia: shape
216ib, 216ic, 226ib, 226ic: characters

Claims (20)

A valve rotatably provided to open and close a pipe for injecting and discharging gas for a gas insulated switchgear;
a shaft extending along the rotation axis of the valve; and
A valve device including an actuator that rotates the shaft. According to paragraph 1,
The actuator is a valve device including a motor that generates power and a power transmission mechanism that transmits power from the motor to the shaft. According to paragraph 2,
The power transmission mechanism is a valve device including a first gear fastened to the drive shaft of the motor and a second gear fastened to the shaft and meshed with the first gear. According to paragraph 3,
The first gear is a valve device formed to have a reduction ratio of 128:1. According to paragraph 3,
The second gear is a valve device formed to have a reduction ratio of 2:1. According to paragraph 3,
The actuator further includes a sensing plate that rotates with the second gear and a sensor that detects the rotation direction and angle of the sensing plate. According to clause 6,
The sensing plate includes a plurality of protrusions that protrude outwardly in the radial direction of the sensing plate and are spaced apart from each other in the circumferential direction of the sensing plate, and a plurality of slots interposed between the plurality of protrusions. In clause 7,
The sensor includes a first sensor and a second sensor arranged to be spaced apart from each other in the circumferential direction of the sensing plate,
The first sensor detects which of the plurality of protrusions and the plurality of slots is opposed to the first sensor,
The second sensor detects one of the plurality of protrusions and the plurality of slots facing the second sensor at a position spaced apart from the first sensor,
A valve device in which the rotation direction and rotation angle of the sensing plate are detected from the detection value of the first sensor and the detection value of the second sensor. According to paragraph 3,
The actuator rotates together with the second gear and further includes a status display wheel that displays an opening amount of the pipe. According to clause 9,
The status display wheel is a valve device configured to continuously display the opening amount of the pipe. According to clause 10,
The status display wheel includes a figure extending in a circumferential direction of the status display wheel,
A valve device in which the width of the figure measured in the axial direction of the status display wheel increases or decreases in one direction of the circumference of the status display wheel. According to clause 11,
A valve device in which the shape is colored in different colors depending on the type of the valve. According to clause 11,
The status display wheel further includes characters indicating the opening amount of the pipe on one end and the other end of the figure in the circumferential direction of the status display wheel, respectively. According to paragraph 1,
The actuator is a valve device configured to operate automatically according to a predetermined program. According to clause 14,
A valve device further comprising a switch to switch the actuator to operate either automatically or manually. According to paragraph 1,
The actuator is a valve device formed to be detachable from the pipe. According to clause 16,
The actuator is a valve device configured to be mounted in an extension direction of the shaft. An interlock system for controlling the valve device according to any one of claims 1 to 17 to close the pipeline when the pipeline should be closed but is in an open state. According to clause 18,
An interlock system that controls the valve device so that it cannot be operated manually when the valve device closes the pipeline because the pipeline should be closed but is in an open state. According to clause 18,
An interlock system that executes at least one of a warning sound, a warning light, and a position output of the pipeline when the valve device should close the pipeline or is in an open state.