KR102637857B1 - Blocking apparatus of electrical trip solenoid valve - Google Patents

Abstract

The present invention relates to a blocking device for an electrical trip solenoid valve that prevents both the ETV and ETSV from being stopped unnecessarily for maintenance of individual devices in the power plant, such as internal leakage of the ETSV. The present invention can be selectively adjusted to supply or not supply the fluid delivered from the ETV to the ETSV by manipulating the on-off valve, so that both the ETV and the ETSV are not stopped unnecessarily during the maintenance process of individual devices, such as internal leakage of the ETSV, or when some functional failure occurs. This has the effect of improving power generation efficiency.

Description

Blocking device for electrical trip solenoid valve {BLOCKING APPARATUS OF ELECTRICAL TRIP SOLENOID VALVE}

The present invention relates to a blocking device for an electrical trip solenoid valve, and more specifically, to an electrical trip solenoid valve that prevents both the ETV and ETSV from being unnecessarily stopped during the maintenance process of individual devices in the power plant, such as internal leakage of the ETSV, or when some functional failure occurs. It relates to a blocking device.

In general, the main control systems of nuclear power plants include the main water supply control system, reactor output control system, pressurizer water level/pressure control system, and turbine governor control system. They provide essential functions for nuclear power plant operation, and the performance of each control system has a significant impact on the efficient operation and utilization of the power plant. In particular, the turbine governor system among the control systems is composed of a high-pressure hydraulic system, is large, has complex driving equipment, and causes many malfunctions during operation, making maintenance difficult.

Accordingly, a turbine protection device is required to immediately cut off steam when an abnormality occurs in the system or power system during power generation to prevent accidents in which turbines and generators rotating at high speeds lose their center of rotation and deviate from the design speed. do. This turbine protection device uses an emergency trip valve (ETV) and an emergency trip solenoid valve (ETSV) as shown in FIG. 1 to control the hydraulic oil supplied to and blocked from the disk dump valve. Includes. ETV and ETSV have irregular operation characteristics that do not operate under normal conditions and must operate as a safety device under abnormal conditions. Securing reliability is required because the operation valve must be operated in an emergency situation and the special operating environment may cause failure due to vibration and high heat.

Meanwhile, domestic nuclear power plants carry out regular maintenance every 18 months in line with the nuclear fuel replacement period, and thermal power plants carry out regular maintenance every 2 years. This maintenance process does not require the turbine to be stopped, so the ETV does not need to operate. However, in the conventional ETV and ETSV, both the ETV and ETSV must be stopped unnecessarily for maintenance of individual devices, such as internal leakage of the ETSV during normal operation. In addition, even if some functional failure occurs in the conventional ETV or ETSV, both the ETV and ETSV must be stopped to correct the problem, resulting in low power generation efficiency.

Republic of Korea Patent Publication No. 10-1968265

The purpose of the present invention to solve the problems of the prior art as described above is to block the electrical trip solenoid valve to prevent both the ETV and ETSV from being unnecessarily stopped during the maintenance process of individual devices of the power plant, such as internal leakage of the ETSV, or when some functional failure occurs. The device is provided.

In order to achieve the above object, the present invention includes a main body located between the ETV and ETSV of the power plant; a first port formed on one side of the main body to receive fluid supplied from the ETV and discharge it to the ETSV; an opening/closing valve located on one side of the first port to open and close the first port; and a second port located on the other side of the first port located between the on-off valve and the ETV, and when the on-off valve opens the first port, fluid supplied from the ETV to the first port. A portion of the fluid passes through the first port and is discharged to the ETSV, and the other portion of the fluid supplied from the ETV to the first port moves to the second port, and when the opening/closing valve closes the first port, the A blocking device for an electrical trip solenoid valve is provided, wherein fluid supplied from the ETV to the first port is moved to the second port.

Additionally, the opening/closing valve includes: a valve body mounted on one side of the first port; A cylinder inserted into the valve body and moved forward and backward; and a blocking unit formed on one side of the cylinder and opening and closing one side of the first port according to movement of the cylinder.

In addition, the first port includes a first flow path extending through one side of the main body and into the interior of the main body, and a second flow path extending from an end of the first flow path and having a smaller diameter than the first flow path. A flow path, one side of which communicates with the second flow path and the other side of which extends in the ETSV direction, and one side connected to one side of the first flow path facing the second flow path and the other side extending in the ETV direction. It includes a fourth flow path, one side of which is connected to one side of the fourth flow path, and the other side of which is connected to the second port, and the opening/closing valve includes: the valve body mounted on one side of the first flow path; The cylinder, one side of which is located on the other side of the first flow path facing the second flow path, and the other side of which penetrates the valve body and is exposed to the outside of the main body; and the blocking portion formed on one side of the cylinder and having a diameter smaller than the first flow path and larger than the second flow path, and when the cylinder is moved backwards away from the second flow path, the blocking part is formed to have a diameter smaller than the first flow path and larger than the second flow path. It is positioned to open the flow path, and a portion of the fluid supplied from the ETV to the fourth flow path sequentially flows along the first flow path, the second flow path, and the third flow path and is then guided to the ETSV, and is then guided to the ETV. Another part of the fluid supplied to the fourth flow path flows into the fifth flow path and is then guided to the second port, and when the cylinder advances to approach the second flow path, the blocking unit blocks the second flow path. It is positioned so that the fluid supplied from the ETV to the fourth passage flows into the fifth passage and then is guided to the second port.

In addition, a flow path space is provided on the other side of the first flow path connected to the second flow path, the fourth flow path is connected to a lower side of the flow path space, and the valve space part is provided so that the cylinder is inserted into the inside of the valve body. A first guide groove having a larger diameter than the valve space is formed on one side of the valve space facing the passage space, and a second outer periphery of one side of the cylinder connected to the blocking portion is concave. When a guide groove is formed and the blocking portion is moved from the front to the back of the flow path space to close the flow path space, the fluid guided to the second guide groove among the fluid flowing into the flow path space is transferred to the first guide. A blocking device for an electrical trip solenoid valve is provided, which is guided into a groove.

In addition, the other side of the cylinder extends to protrude outside the main body, and as rotational pressure is applied to the other side of the cylinder from the outside, one side of the cylinder moves forward or backward. An electrical trip solenoid valve. Provides a blocking device.

In addition, a plurality of first ports are formed in parallel within the main body, a plurality of ETSVs are provided on the upper part of the main body to be connected to each of the first ports, and the opening/closing valve is connected to each of the first ports. consists of a plurality of ports to open and close, one side of the second port is connected to the ETV, and the other side of the second port is branched into a plurality of ports to be individually connected to each of the first ports. Provides a blocking device for solenoid valves.

The present invention can be selectively adjusted to supply or not supply the fluid delivered from the ETV to the ETSV by manipulating the on-off valve, so that both the ETV and the ETSV are not stopped unnecessarily during the maintenance process of individual devices, such as internal leakage of the ETSV, or when some functional failure occurs. This has the effect of improving power generation efficiency.

In addition, since the cylinder is formed to protrude out of the main body, the operator can rotate the cylinder using a tool, which has the effect of manually moving the cylinder forward or backward without separate complicated automation equipment.

In addition, since the second guide groove and the first guide groove are formed in the cylinder and the valve body, a part of the fluid moving rearward along the blocking portion is received in the second guide groove and the first guide groove, and thus the fluid transmitted to the blocking portion is received. The recoil pressure of the fluid is reduced, so the cylinder can be easily retracted.

In addition, since the second port connected to the ETV is branched into multiple ETSVs, if a problem occurs with the ETSV selected among the plurality of ETSVs, the opening/closing valve blocks the first port connected to the selected ETSV, and the first port connected to other normal ETSVs is blocked. By opening the on-off valve, fluid supplied from the ETV can be selectively supplied to the normal ETSV, thereby ensuring the continuity of the entire system.

Figure 1 is a diagram showing a hydraulic control circuit diagram of a conventional turbine emergency stop system including ETV and ETSV.
2 and 3 are diagrams schematically showing a blocking device for an electrical trip solenoid valve according to a preferred embodiment of the present invention.
Figure 4 is a cross-sectional view of a blocking device for an electrical trip solenoid valve according to a preferred embodiment of the present invention.
Figure 5 is a cross-sectional view showing the inside of the main body of the blocking device for the electrical trip solenoid valve according to a preferred embodiment of the present invention.
Figure 6 is a diagram schematically showing the state in which fluid moves along the first port, second port, and third port located inside the main body of the device for blocking the electrical trip solenoid valve according to a preferred embodiment of the present invention.
Figure 7 is a diagram schematically showing the state in which fluid is moved from the electrical trip solenoid valve blocking device to the ETV and ETSV according to a preferred embodiment of the present invention.
Figure 8 is a diagram schematically showing a state in which the opening/closing valve of the blocking device for the electrical trip solenoid valve opens and closes the first port according to a preferred embodiment of the present invention.
Figure 9 is a diagram schematically showing a state cut in half to explain a blocking device for an electrical trip solenoid valve according to a preferred embodiment of the present invention.

Hereinafter, a blocking device for an electrical trip solenoid valve according to a preferred embodiment of the present invention will be described in more detail with reference to the attached drawings.

2 and 3 are diagrams schematically showing a blocking device for an electrical trip solenoid valve according to a preferred embodiment of the present invention, and Figure 4 is a cross-sectional view of a blocking device for an electrical trip solenoid valve according to a preferred embodiment of the present invention. This is a drawing.

2 to 4, the blocking device 100 of the electrical trip solenoid valve according to a preferred embodiment of the present invention selectively blocks the connection between the ETV 10 and the ETSV 20 of the power plant, and the main body 110 ), a first port 120, a second port 130, a third port 140, and an opening/closing valve 150.

The main body 110 is formed in a substantially hexahedral shape and is located between the ETV 10 and the ETSV 20. The first port 120 is formed on one side of the main body 110 to allow movement of fluid such as steam, and receives the fluid supplied from the ETV 10 and discharges it to the ETSV 20. The second port 130 is located on one side of the first port 120 located between the on-off valve 150 and the ETV 10 so that the fluid can move, and drains the fluid delivered from the first port 120. I order it. The third port 140 is formed on the other side of the main body 110 to allow fluid movement, and receives the fluid supplied from the ETSV 20 and discharges it to the ETV 10. The opening/closing valve 150 is located on the other side of the first port 120 and opens and closes the first port 120. With reference to FIG. 5 , the detailed structures of the first port 120 and the opening/closing valve 150 will be described.

Figure 5 is a cross-sectional view showing the inside of the main body of the blocking device for the electrical trip solenoid valve according to a preferred embodiment of the present invention.

Referring to FIG. 5, the first port 120 has a first flow path 121 extending horizontally through one side of the main body 110 and into the inside of the main body 110, and a front side of the first flow path 121. A second flow path 122 extends from the end and has a smaller diameter than the first flow path 121, and one side communicates with the second flow path 122 and the other side extends upward to be connected to the ETSV 20. A third flow path 123 and a fourth flow path 124 formed on one side connected to the front of the first flow path 121 facing the second flow path 122 and extending downward so as to be connected to the ETV 10 on the other side. , one side is connected to one side of the fourth flow path 124, and the other side includes a fifth flow path 125 connected to the second port 130. Also, a flow path space 121a is provided in front of the first flow path 121 connected to the second flow path 122, and a fourth flow path 124 is connected to the lower side of the flow path space 121a.

The opening/closing valve 150 includes a valve body 152 mounted on the rear side of the first flow path 121 located in the opposite direction of the flow path space 121a, and a first flow path (152) on one side facing the second flow path 122. 121), the other side of which is located on the front side of the valve body 152 and exposed to the outside of the main body 110, and a cylinder 154 formed on one side of the cylinder 154, which is smaller than the first flow path 121 and is exposed to the outside of the main body 110. 2 It includes a blocking portion 156 formed to have a diameter larger than the flow path 122. A valve space portion 152a is formed through the inside of the valve body 152 to allow the cylinder 154 to be inserted. And when the cylinder 154 moves backwards away from the second flow path 122, the blocking unit 156 moves backwards along the cylinder 154 and is positioned to open the second flow path 122. Conversely, when the cylinder 154 is advanced to become closer to the second flow path 122, the blocking portion 156 is advanced along the cylinder 154 and is positioned to block the second flow path 122, thereby blocking the second flow path 122. is blocked. At this time, the other side of the cylinder 154 is extended to protrude out of the main body 110, and as rotational pressure is applied to the other side of the cylinder 154 from the outside, one side of the cylinder 154 moves forward or backward. You can. In this way, since the cylinder 154 is formed to protrude to the outside of the main body 110, the operator can rotate the cylinder 154 using a simple tool, and the cylinder 154 can be manually advanced or moved without separate complicated automation equipment. It has the effect of moving backwards.

Meanwhile, a first guide groove 152b having a larger diameter than the valve space 152a is formed on one side of the valve space 152a facing the flow path space 121a, and is connected to the blocking portion 156. A second guide groove 154a is formed concavely on one outer periphery of the cylinder 154. The first and second guide grooves 152b and 154a will be described later.

Figure 6 is a diagram schematically showing the state in which fluid moves along the first port, second port, and third port located inside the main body of the blocking device of the electrical trip solenoid valve according to a preferred embodiment of the present invention; Figure 7 is a diagram schematically showing the state in which fluid is moved from the electrical trip solenoid valve blocking device to the ETV and ETSV according to a preferred embodiment of the present invention.

Referring to FIGS. 6 and 7, in a state in which the blocking portion 156 of the on-off valve 150 is retracted to open the second flow passage 122, the fluid such as steam supplied from the power plant to the ETV 10 Some is supplied to the fourth flow path 124. And a portion of the fluid supplied to the fourth flow path 124 flows through the flow path space portion 121a of the first flow path 121 into the open second flow path 122 and then flows into the third flow path 123. . Subsequently, the fluid flowing into the third flow path 123 is guided to the ETSV (20). And another part of the fluid supplied to the fourth flow path 124 flows to the fifth flow path 125 and then is guided to the second port 130.

Meanwhile, referring to FIGS. 2 to 6, a plurality of first ports are formed in parallel within the main body, a plurality of opening/closing valves are configured to open and close each of the first ports, and the second port is It consists of a plurality of ETSVs to be located in each of the first ports, and a plurality of ETSVs are provided on the upper part of the main body to be connected to each of the first ports.

Figure 8 is a diagram schematically showing a state in which the opening/closing valve of the blocking device for the electrical trip solenoid valve opens and closes the first port according to a preferred embodiment of the present invention.

First, referring to (a) of FIG. 8, the cylinder 154 is advanced to approach the second flow path 122, and the blocking portion 156 is positioned to block the second flow path 122. Then, part of the fluid supplied from the ETV (10) to the fourth flow path (124) moves to the flow path space (121a), but no further movement is possible, so the fluid supplied from the ETV (10) cannot be supplied to the ETSV (20). does not exist. And another part of the fluid supplied to the fourth flow path 124 flows to the fifth flow path 125 and then is guided to the second port 130.

In this way, the present invention can be selectively adjusted to supply or not supply the fluid delivered from the ETV (10) to the ETSV (20) by manipulating the on-off valve (150), so that the maintenance process of individual devices, such as internal leakage of the ETSV (20), or When some functional failure occurs, both the ETV (10) and the ETSV (20) do not need to be stopped unnecessarily, which has the effect of improving power generation efficiency.

Next, referring to (b) of FIG. 8, when the cylinder 154 is rotated and the blocking unit 156 moves backward to open the second flow path 122, the blocking part 156 opens the second flow path 122. is positioned to open. Then, part of the fluid supplied from the ETV 10 to the fourth flow path 124 is moved to the flow path space portion 121a of the first flow path 121 and then flows into the second flow path 122 and the third flow path 123. After passing through, you will be guided to ETSV (20). And another part of the fluid supplied to the fourth flow path 124 flows to the fifth flow path 125 and then is guided to the second port 130.

Meanwhile, before the blocking portion 156 is retracted to open the second passage 122, fluid is accommodated in the passage space 121a. In this state, when the blocking portion 156 moves backward, the fluid in the flow path space 121a moves backward along the blocking portion 156 to apply pressure to the cylinder 154 and the valve body 152. The pressure of this fluid hits the cylinder 154 and the valve body 152 and is transmitted back to the blocking unit 156 as a reaction pressure, preventing the blocking unit 156 from moving backward. In contrast, the present invention forms a second guide groove (154a) and a first guide groove (152b) in the cylinder 154 and the valve body 152, so that a portion of the fluid moving rearward along the blocking portion 156 It is accommodated in the second guide groove (154a) and the first guide groove (152b). Then, the recoil pressure of the fluid transmitted to the blocking portion 156 is reduced, so that the cylinder 154 is easily retracted.

Figure 9 is a diagram schematically showing a state cut in half to explain a blocking device for an electrical trip solenoid valve according to a preferred embodiment of the present invention.

Referring to the drawings, FIG. 9 shows the ETV 10 and the main body 110 arbitrarily cut in half to illustrate the connection structure between the first port 120 and the second port 130. It should not be understood as a state in which the main body 110 is separated and then combined.

A plurality of ETSVs 20 are provided on the upper part of the main body 110 to be connected to each first port 120. A plurality of first ports 120 are formed in parallel within the main body 110 according to the number of ETSVs 20. A plurality of on-off valves 150 are coupled to the main body 110 to open and close each first port 120.

And one side of the second port 130 is composed of one 2-1 port 130a to be connected to one ETV 10, and the other side of the second port 130 is each of the first ports 120. It consists of a plurality of 2-2 ports (130b) branched on one side of one 2-1 port (130a) to be individually connected to. And the 2-1 port 130a is connected to the ETV 10, and each 2-2 port 130b is connected to the fifth flow path 125 of each first port 120.

In this way, since the second port 130 connected to the ETV 10 is branched into a plurality of ports, if a problem occurs in the ETSV 20 selected among the plurality of ETSVs 20, the first port connected to the selected ETSV 20 ( 120) is blocked by the on-off valve 150, and the on-off valve 150 opens the first port 120 connected to another normal ETSV (20), so that the fluid supplied from the ETV (10) is connected to the normal ETSV (20). It can be supplied selectively, which has the effect of ensuring the continuity of the entire system.

Although the present invention has been described in detail in the above embodiments, it is obvious that the present invention is not limited thereto, and it is clear to those skilled in the art that various changes and modifications are possible within the scope of the technical idea of the present invention, and such changes and modifications are attached. If it falls within the scope of the claims, the technical idea should also be considered as belonging to the present invention.

100: Blocking device of the electrical trip solenoid valve
110: main body 120: first port
121: Euro 1 121a: Eurospace Department
122: 2nd euro 123: 3rd euro
124: 4th euro 125: 5th euro
130: 2nd port 130a: 2-1 port
130b: 2-2 port 140: 3rd port
150: Open/close valve 152: Valve body
152a: valve space 152b: first guide groove
154: Cylinder 154a: Second guide groove
156: Blocking unit

Claims (6)

A main body located between the ETV and ETSV of the power plant;
a first port formed on one side of the main body to receive fluid supplied from the ETV and discharge it to the ETSV;
an opening/closing valve located on one side of the first port to open and close the first port; and
It includes a second port located on the other side of the first port located between the on-off valve and the ETV,
When the opening/closing valve opens the first port, a portion of the fluid supplied from the ETV to the first port passes through the first port and is discharged to the ETSV, and a portion of the fluid supplied from the ETV to the first port is discharged to the ETSV. the other part is moved to the second port,
When the opening/closing valve closes the first port, the fluid supplied from the ETV to the first port moves to the second port,
The on/off valve is:
A valve body mounted on one side of the first port;
A cylinder inserted into the valve body and moved forward and backward; and
A blocking portion formed on one side of the cylinder and opening and closing one side of the first port according to movement of the cylinder,
The first port includes a first flow path extending through one side of the main body and into the interior of the main body, and a second flow path extending from an end of the first flow path and having a smaller diameter than the first flow path. , a third flow path on which one side communicates with the second flow path and the other side extends in the ETSV direction, and one side connected to one side of the first flow path facing the second flow path and the other side extending in the ETV direction. It includes four flow paths, one side of which is connected to one side of the fourth flow path, and the other side of which is connected to the second port, and a fifth flow path,
The on/off valve is:
The valve body mounted on one side of the first flow path;
The cylinder, one side of which is located on the other side of the first flow path facing the second flow path, and the other side of which penetrates the valve body and is exposed to the outside of the main body; and
It is formed on one side of the cylinder and includes the blocking portion formed to have a diameter smaller than the first flow path and larger than the second flow path,
When the cylinder is retracted away from the second flow path, the blocking portion is positioned to open the second flow path, and a portion of the fluid supplied from the ETV to the fourth flow path flows into the first flow path, the second flow path, and After sequentially flowing along the third flow path, it is guided to the ETSV, and another part of the fluid supplied from the ETV to the fourth flow path flows into the fifth flow path and then is guided to the second port,
When the cylinder is advanced to approach the second flow path, the blocking portion is positioned to block the second flow path, and the fluid supplied from the ETV to the fourth flow path flows into the fifth flow path and then flows to the second port. A blocking device for an electrical trip solenoid valve, characterized in that it is guided by.
delete delete According to claim 1,
A flow path space is provided on the other side of the first flow path connected to the second flow path, and the fourth flow path is connected to a lower side of the flow path space,
A valve space is formed to allow the cylinder to be inserted into the valve body,
A first guide groove having a larger diameter than the valve space is formed on one side of the valve space facing the flow path space,
A second guide groove is formed concavely on one outer periphery of the cylinder connected to the blocking portion,
When the blocking unit moves from the front to the rear of the flow path space to close the flow path space, the fluid guided to the second guide groove among the fluid flowing into the flow path space is guided to the first guide groove. A blocking device for an electrical trip solenoid valve.
According to claim 1,
The other side of the cylinder is formed to extend to protrude out of the main body,
A blocking device for an electrical trip solenoid valve, wherein one side of the cylinder moves forward or backward as rotational pressure is applied from the outside to the other side of the cylinder.
A main body located between the ETV and ETSV of the power plant;
a first port formed on one side of the main body to receive fluid supplied from the ETV and discharge it to the ETSV;
an opening/closing valve located on one side of the first port to open and close the first port; and
It includes a second port located on the other side of the first port located between the on-off valve and the ETV,
When the opening/closing valve opens the first port, a portion of the fluid supplied from the ETV to the first port passes through the first port and is discharged to the ETSV, and a portion of the fluid supplied from the ETV to the first port is discharged to the ETSV. the other part is moved to the second port,
When the opening/closing valve closes the first port, the fluid supplied from the ETV to the first port moves to the second port,
A plurality of first ports are formed in parallel within the main body,
A plurality of ETSVs are provided on the upper part of the main body to be connected to each of the first ports,
The opening/closing valve is composed of a plurality of valves to open and close each of the first ports,
A blocking device for an electrical trip solenoid valve, characterized in that one side of the second port is connected to the ETV, and the other side of the second port is branched into a plurality of pieces to be individually connected to each of the first ports.

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