KR101850114B1 - Bypass/blocking apparatus for replacing of actuator control valve - Google Patents

Abstract

The present invention relates to a bypass/blocking apparatus to replace an actuator control valve. According to the present invention, a plurality of fluid lines are formed inside a main body (10) installed on an actuator (1). A direction control valve (20), an electronic blocking valve (30), first and second pilot check valves (33, 33′), and first and second manual valves (40, 50) are installed on one side of the main body (10). The first manual valve (40) supplies a fluid from a fluid supply source to the direction control valve (20) or directly supplies the fluid to the actuator (1). The second manual valve (50) supplies or blocks the fluid between the actuator (1) and the direction control valve (20). The electronic blocking valve (30) is able to be operated in a remote plate and controls the operation state of the first and second pilot check valves (33, 33′). As such, provided are advantages capable of replacing valves related to the actuator during operation of a power generation plant, and operating the electronic blocking valve (20) in a remote place to maintain the operation state of the actuator (1) continuously.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bypass / blocking apparatus for replacing an actuator control valve,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bypass / blocking device for replacing an actuator control valve, and more particularly, to a bypass / blocking device for replacing an actuator control valve to replace a control valve for controlling an actuator during operation of the actuator .

The power generation facility requires a long time until the normal operation is performed so that the operation is started and the actual power generation is performed, or the operation is stopped after the operation is performed and the maintenance operation can be performed. Therefore, there is a problem that stopping the operation of the power generation facility and restarting the operation of the power generation facility causes an enormous amount of time and cost. Therefore, if various components constituting the power generation facility are broken, it takes a lot of time to replace them, and it takes a lot of cost to consider that the power generation can not be actually performed while parts are being replaced.

Therefore, even if a specific part fails, it is necessary to be able to replace the corresponding part without stopping the operation of the entire power generation facility. Particularly, in the case of the actuator, since the fluid used for the control leaks from the supply port when the control valve for controlling the actuator is separated and plays an important role in the power generation facility, Replace it. However, in this case, there arises a problem that the operation of the entire facility must be stopped in order to replace one actuator control valve.

On the other hand, in the case of power generation facilities, a large number of control valves are used because the entire equipment is large. Accordingly, there is a problem that a large number of personnel must be disposed in order to manually operate each control valve and the like.

Korean Patent No. 10-1319017 Korean Utility Model Publication No. 20-1995-0019761

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and it is an object of the present invention to replace a fixed egg control valve that controls an actuator while continuously operating an apparatus.

Another object of the present invention is to remotely control an actuator operation of a power generation facility so that the power generation facility is operated while being maintained in a specific state.

According to an aspect of the present invention for achieving the above object, the present invention provides a fluid supply device comprising: a main body in which a fluid line is formed; An electromagnetic shutoff valve that is driven to receive a portion of the fluid supplied to the directional control valve and a first and a second control valve that controls fluid flow between the directional control valve and the actuator by driving the electromagnetic shut- A pilot valve, a first manual valve for controlling the delivery of fluid from the fluid supply source to the actuator and delivering the fluid to the directional control valve or delivering the fluid directly to the actuator, And a second passive valve operative to shut off or connect fluid flow.

The first and second pilot check valves normally maintain fluid flow between the directional control valve and the actuator and block fluid flow from the actuator to the directional control valve by driving the electromagnetic shut-off valve.

The first passive valve may include a first housing having a first internal space formed therein and a second housing which is installed in the first internal space by directly transmitting the fluid supplied from the fluid supply source to the actuator or transmitting the fluid to the directional control valve, And a first handle installed on the first body protruded from the front end of the first housing and receiving a force for rotating the first body from the user.

A supply port communicating hole and an inlet line communicating hole communicating with the first internal flow passage and having a predetermined angle interval and a communication hole communicating with the first internal flow passage, A first control valve line communicating part formed on the outer surface of the rear end of the first body and selectively connected to the direction control valve side, and a first port communicating part selectively communicating with the actuator side, Is formed over a predetermined section.

The first housing is formed with a supply port communication hole communicating selectively with the bypass inlet hole or the supply port communication hole of the first body, an inlet line communication hole communicating with the direction control valve side is formed, A first port communication hole selectively communicating with the first control valve line communicating hole and a first port communicating portion selectively communicating with the line communicating portion is formed.

The second passive valve includes a second housing having a second internal space formed therein and a second housing having a second fluid passage communicating with the first fluid passage, And a second handle installed on the second body protruding from the tip of the second housing and receiving a force for rotating the second body from the user.

A second port communicating hole communicating with the direction control valve is formed in the second housing in communication with the second internal space and a second port communicating hole communicating with the actuator side is formed in communication with the second internal space .

The second body is formed with a second control valve line communication part selectively communicating with the second control valve line communication hole and a second port communication part selectively communicating with the second port communication hole, The communication portion and the second port communication portion are formed at positions opposite to each other on the outer surface of the second body to control the flow of the fluid by the rotation of the second body.

According to the bypass / blocking apparatus for replacing the actuator control valve according to the present invention, the following effects can be obtained.

In the present invention, it is possible to control the actuator of the power generation facility so that it is located at a specific position by operating an electronic shutoff valve that can be operated at a remote location and first and second pilot check valves driven by the electromagnetic shutoff valve So that the operation state of the actuator can be controlled at a remote site as desired. Particularly, it is possible to make the piston in the actuator to be stopped at a specific position, so that it is possible to cope with various operation states.

In addition, in the present invention, the first and second passive valves are disposed so that the fluid supplied from the fluid supply source is normally flowed in a desired direction between the actuator and the directional control valve, and when the directional control valve is maintained, 1 fluid is directly supplied to the actuator through the manual valve, and the fluid flowing from the actuator to the directional control valve is blocked by the second manual valve. By doing so, the maintenance of the directional control valve or the like is enabled during the operation of the power generation facility.

1 is a perspective view showing a configuration of a preferred embodiment of a bypass / blocking device for replacing an actuator control valve according to the present invention.
Fig. 2 is a bottom perspective view showing the external configuration of the embodiment of the present invention in another direction. Fig.
3 is a hydraulic circuit diagram showing a hydraulic circuit configuration of an embodiment of the present invention.
4 is a perspective view showing a configuration of a first manual valve constituting an embodiment of the present invention.
5 is an exploded perspective view of the first manual valve shown in Fig.
6 is a perspective view of a first body constituting a first manual valve according to an embodiment of the present invention;
7 is an operational state diagram of a first manual valve operated in a bypass state in the embodiment of the present invention.
8 is an operational state diagram of a first manual valve operated in a steady state in the embodiment of the present invention.
9 is a perspective view showing a configuration of a second manual valve constituting an embodiment of the present invention.
FIG. 10 is an exploded perspective view of the second manual valve shown in FIG. 9; FIG.
11 is an operational state diagram of a second manual valve operated in a steady state in the embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the understanding why the present invention is not intended to be interpreted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

According to the drawings, the main body 10 forms the framework of the embodiment of the present invention. The main body 10 has a substantially hexahedral block shape. A hydraulic line is formed in the main body 10 and various valves are mounted.

As shown in FIG. 2, the first port 11 and the second port 12 are opened at one side of the body 10. The first port 11 and the second port 12 are connected to the actuator 1 as shown in FIG. A piston (not shown) inside the actuator 1 moves while a fluid flows in and out through the first port 11 and the second port 12 to be connected to the piston and to the outside of the actuator 1 So that the projected driving rod 3 is operated. For example, when the fluid enters the actuator 1 through the first port 11 and the fluid in the actuator 1 flows out through the second port 12, As shown in FIG.

The main body 10 is formed with a hydraulic pressure supply port 14 and a hydraulic pressure recovery port 16 which are opened to the outer surface of the other side. A fluid is supplied from the hydraulic pressure supply source to the hydraulic pressure supply port 14 and enters a line inside the main body 10. In the hydraulic pressure recovery port 16, Line. ≪ / RTI >

A plurality of fastening holes 18 are formed in the body 10 so as to penetrate the upper and lower portions of the body 10 and open to the outer surface where the first port 11 and the second port 12 are formed. The fastening hole 18 is a portion through which a fastener for fastening the main body 10 to the actuator 1 passes. In the present embodiment, four fastening holes 18 are formed.

A plurality of test ports 19 may be formed on the outer surface of one side of the main body 10. The test port 19 may communicate with the lines formed in the main body 10 to detect an operation state of the valves installed in the main body 10. The test port 19 may be formed on other surfaces except the outer surface where the first port 11 and the second port 12 are formed.

A direction control valve 20 is installed at one side of the main body 10. The directional control valve 20 controls the supply of fluid from the fluid supply source to the inside of the actuator 1 (either of the spaces on either side of the piston). The directional control valve 20 can be a proportional control valve, and it can control the direction, speed, flow rate, etc. of the fluid. A driving part 22 is installed on both sides for the operation of the directional control valve 20. The driving unit 22 generally uses a solenoid.

The directional control valve 20 is connected to a first inflow line 24 communicating with the hydraulic pressure supply port 14 and a first recovery line 24 'communicated with the hydraulic pressure recovery port 16. The first inflow line 24 and the first withdrawal line 24 'are formed inside the main body 10. The directional control valve 20 is also formed with a first directional control valve line 25 and a second directional control valve line 25 '. The first directional control valve line 25 is connected to the first port 11 substantially as seen in FIG. 3 and the second directional control valve line 25 'is substantially connected to the second port 12). Of course, the first pilot check valve 33 and the first manual valve 40 are installed in the first direction control valve line 25 and the second pilot control valve line 25 ' A second pilot check valve 33 'and a second manual valve 50 to be described below are installed.

An electromagnetic cutoff valve (30) is provided on the outer surface of one side of the main body (10). The electromagnetic shut-off valve 30 can be electronically operated so that it can be controlled remotely. The electromagnetic shutoff valve 30 is connected to the hydraulic pressure supply port 14 and the hydraulic pressure recovery port 16 so as to receive the fluid from the hydraulic pressure supply port 14 and to receive the first pilot check valve 33 and the second pilot check valve 33 '. That is, normally, the first pilot check valve 33 and the second pilot check valve 33 'function as a valve in the first direction control valve line 25 and the second direction control valve line 25' The first pilot check valve 33 and the second pilot check valve 33 'perform a function as a check valve, that is, a function of allowing fluid to flow only in one direction.

The electromagnetic shut-off valve 30 communicates with the hydraulic pressure supply port 14 through the second inlet line 31 and communicates with the hydraulic return port 16 through the second recovery line 31 '. For reference, the second inflow line 31 and the second recovery line 31 'partially overlap with the first inflow line 24 and the first recovery line 24'. The electron cutoff valve 30 also communicates with the first pilot check valve 33 and the second pilot check valve 33 ', which will be described below, via the pilot lot line 32.

There is a first pilot check valve 33 and a second pilot check valve 33 'in communication with the electromagnetic shut-off valve 30 through the pilot lot line 32. The first pilot check valve 33 is installed on the first direction control valve line 25 and the second pilot check valve 33 'is installed on the second direction control valve line 25' Respectively. The first and second pilot check valves 33.33 'do not normally function as valves and fluid is freely flowed through the first direction control valve line 25 and the second direction control valve line 25' Flow. However, the first pilot check valve 33 and the second pilot check valve 33 'are set so as to be operated by the electromagnetic shut-off valve 30 so that the fluid flows only in one direction. That is, the first pilot check valve 33 allows the fluid to flow from the direction control valve 20 to the actuator 1 only, and the second pilot check valve 33 also controls the direction control valve 20 To the actuator (1). Therefore, when driven by the electromagnetic shut-off valve 30, the first pilot check valve 33 and the second pilot check valve 33 'are operated by the direction control valve 20 from the actuator 1, Thereby preventing the fluid from flowing. The first and second pilot check valves 33 and 33 'function as a kind of check valve that allows the fluid to flow only in one direction only when it is driven by the fluid passing through the electromagnetic shut-off valve 30 . In a state not driven by the electromagnetic shut-off valve 30, as described above, the fluid can freely flow in any direction without functioning as a valve.

1, a first pilot check valve 33 and a second pilot check valve 33 are provided on both sides of the electromagnetic shut-off valve 30 on the basis of the outer surface of the main body 10, 33 '.

A first manual valve 40 is provided at a position adjacent to the actuator 1 in the one-way control valve line 25 and a second manual valve 40 is provided at the second direction control valve line 25 ' And a second manual valve 50 is provided at an adjacent position.

The first manual valve 40 allows the fluid to flow between the directional control valve 20 and the actuator 1 at normal times and then sends the fluid to the actuator 1 immediately if necessary. At this time, the fluid is sent from the hydraulic pressure supply port 14 to the actuator 1 through the bypass line 40 '.

The second manual valve 50 is normally operated to allow fluid to flow between the directional control valve 20 and the actuator 1, and to block the flow between them if necessary.

The first manual valve 40 includes a first housing 42, a first body 45, and a first handle 45 '. The first housing 42 constitutes the outer surface of the first manual valve 40 and has a first internal space 42 'through which the first body 45 is positioned. The first body 45 is installed in the first inner space 42 '.

A supply port communication hole (43) is formed on the outer surface of one side of the first housing (42). The supply port communication hole (43) communicates with the hydraulic pressure supply port (14) to allow fluid to flow. An inlet line communication hole 43 'is formed at a position which is rotated 90 degrees from the position where the supply port communication hole 43 is formed and moved in the longitudinal direction of the first housing 42. The inlet line communication hole 43 'communicates with the first inlet line 24. Therefore, the fluid introduced through the supply port communication hole 43 flows into the first inflow line 24 through the first body 45 and into the inflow line communication hole 43 '.

The first control valve line communication hole 44 communicates with the first internal space 42 'in the first housing 42 so that the first control valve line communication hole 44 communicates with the first internal space 42' As shown in Fig. The first control valve line communication hole (44) communicates with the first direction control valve line (25). A first port communication hole 44 'is formed to communicate with the first internal space 42' at a position rotated by 90 degrees from the first control valve line communication hole 44. The first port communicating hole 44 'communicates with the first port 11 so as to cause fluid flow to the inside and the outside of the actuator 1.

A first handle 45 'is provided at a position protruding forward from the tip end of the first housing 42 in one end of the first body 45 positioned in the first inner space 42' of the first housing 42. [ ) Is installed. The first handle 45 'allows the operator to rotate the first body 45 directly. The first handle 45 'is installed orthogonally to the longitudinal direction of the first body 45.

A first internal flow path 46 is formed in the first body 45. The first internal flow path 46 is open to one end of the first body 45 at the time of processing, but a first stopper 46 'is provided as shown in FIG. A supply port communication hole 47 is formed in the first body 45 at one side to communicate with the first internal flow path 46. The supply port communicating hole 47 is selectively communicated with the supply port communicating hole 43 of the first housing 42. An inlet line communication hole 47 'is formed in the first body 45 at a position rotated 90 degrees from the supply port communication hole 47 and moved in the longitudinal direction of the first body 45. The inflow line communication hole 47 'is also communicated with the first internal flow path 46. The inflow line communication hole 47 'is selectively connected to the inflow line communication hole 43' of the first housing 42 and is connected to the first inflow line 24.

A bypass inflow hole 48 is formed at a position rotated by 90 degrees from the supply port communicating hole 47 of the first body 45. The bypass inflow hole 48 is formed to communicate with the first internal flow path 46 and selectively communicated with the supply port communication hole 43 of the first housing 42. A bypass outlet hole 48 'is formed at a position which is rotated 90 degrees with respect to the bypass inlet hole 48 and is moved in the longitudinal direction of the first body 45. The bypass outlet hole 48 'selectively communicates with the first port communicating hole 44' of the first housing 42 so that fluid bypassed from the first port communicates with the first port 11 through the actuator 1 . The bypass outlet hole 48 'communicates with the first internal flow passage 46.

A first control valve line communicating portion 49 is formed at a rear end portion of the first body 45 for a predetermined period by being moved in the longitudinal direction of the first body 45 in the inflow line communication hole 47 ' And the first port communicating portion 49 'is formed at a rear end portion of the first body 45 over a predetermined interval at a position rotated by 180 degrees. One end of the first control valve line communicating part 49 and the first port communicating part 49 'are formed so as to protrude from the first housing 42 and the other end of the first control valve line communicating part 49 and the first port communicating part 49' And is located in the first inner space 42 '. The first control valve line communication portion 49 selectively communicates with the first control valve line communication hole 44 when viewed in the longitudinal direction of the first body 45. The first port communicating portion 49 'communicates with the first port communicating hole 44' to selectively communicate with the first port communicating port 49 '.

Accordingly, the first control valve line communicating part 49 communicates with the first port communicating part 49 'at a portion protruding outward of the first housing 42. Of course, the portion protruding outward from the first housing 42 is located in the space formed inside the body 10.

Next, the configuration of the second manual valve 50 will be described. And the second housing 52 forms an outer appearance of the second manual valve 50. [ A second inner space 52 'is formed in the second housing 52 so as to pass therethrough. The second housing 52 has a second control valve line communication hole 54 formed at one side thereof and a second port communication hole 54 ' Respectively. The second control valve line communication hole 54 is a portion communicating with the second direction control valve line 25 'and the second port communication hole 54' is communicated with the second port 12 ' Section.

A second body 55 is installed in the second inner space 52 'of the second housing 52. The second body 55 penetrates the second housing 52 forward and backward, and the front end and the rear end of the second body 55 protrude to the outside of the second housing 52, respectively. A second handle 55 'is provided on one side of the tip of the second body 55 to allow the operator to rotate the second body 55. The second handle 55 'is restricted in its movement stroke by a stopper (not shown) on the front surface of the second housing 52. In this embodiment, the second handle 55 'may be rotated by 90 degrees. For reference, the rotation of the first handle 45 'of the first manual valve 40 is also restricted.

A second control valve line communicating portion 59 is formed at a rear end of the second body 55 over a predetermined interval. The second control valve line communication portion 59 communicates with the second direction control valve line 25 'through the control valve line communication hole 54 of the second housing 52. A second port communicating part 59 'is formed on the outer surface of the rear end of the second body 55 opposite to the second control valve line communicating part 59 over a predetermined interval. The second port communicating portion 59 'extends to the outside of the second body 55 and the portion located inside the second internal space 52 is communicated with the second port communicating portion 59' And is selectively in communication with the hole 54 '. For reference, no flow path is formed inside the second body 55.

Hereinafter, the operation of the bypass / blocking device for replacing the actuator control valve according to the present invention will be described in detail.

First, the operation of the apparatus of the present invention will be described with reference to the circuit diagram shown in Fig. The main body 10 is attached to the actuator 1 by fastening a fastener passing through the fastening hole 18 to the actuator 1. At this time, the first port 11 and the second port 12 are connected to the actuator 1, respectively, so that the fluid is allowed to flow into and out of both sides of the piston in the actuator 1. A hose or pipe connected to the fluid supply source is connected to the hydraulic pressure supply port 14 and the hydraulic pressure recovery port 16.

In this state, the first handle 45 'is positioned so that the first manual valve 40 is in the state shown in FIG. 8, and the second manual valve 50 is placed in the state shown in FIG. A handle 55 'is located.

8, the supply port communicating hole 47 of the first body 45 is aligned with the supply port communicating hole 43 of the first housing 42. As shown in FIG. The inlet line communication hole 47 'of the first body 45 is aligned with the inlet line communication hole 43' of the first housing 42 so that the fluid introduced through the hydraulic pressure supply port 14 flows into the first And is transferred to the first inflow line 24 via the inner flow path 45.

The fluid delivered to the first inflow line 24 is directed to the directional control valve 20 and is then directed by the directional control valve 20 to the first directional control valve line 25, Valve line 24 '. Here, the case of being transmitted to the first direction control valve line 25 will be described.

When the fluid flows through the first direction control valve line 25, the fluid flows through the first pilot check valve 33 and the first port 11 through the first manual valve 40, (1). When the fluid is supplied to the actuator 1 through the first port 11, the driving rod 3 is moved in the direction of the arrow in FIG.

Here, the introduction of the fluid into the actuator 1 via the first manual valve 40 will be described with reference to FIG. The fluid moved along the first directional control valve line 25 enters the first control valve line communication portion 49 through the first control valve line communication hole 44 of the first manual valve 40 Through the first port communicating hole 44 'through the first port communicating portion 49' through the outside of the first housing 42 to the actuator 1 via the first port 11, Goes.

When the fluid enters the actuator 1 through the first port 11, fluid flows through the second port 12 and flows through the second directional control valve line 25 'through the directional control valve 20 and into the hydraulic return port 16 via the first recovery line 24'.

On the other hand, fluid may be supplied to the second directional control valve line 25 'under the control of the directional control valve 20. That is, the fluid supplied through the hydraulic pressure supply port 14 flows through the second directional control valve line 25 ', the second pilot check valve 33', the second manual valve 50, the second port 12 into the actuator 1. At this time, as shown in FIG. 11, a flow of the fluid occurs in the second manual valve 50. That is, the fluid from the second directional control valve line 25 'flows into the second control valve line communication hole 54 and flows through the second control valve line communication portion 59, the second housing 52, Through the second port communicating hole 54 'and the second port 12 via the second port communicating portion 59' through the outside of the second port communicating portion 59 '. At this time, in the first manual valve 40, a flow is generated in a direction opposite to that shown in FIG. 8, and the fluid flows out of the actuator 1 to the hydraulic return port 16.

On the other hand, it may be necessary to fix the driving rod 3 of the actuator 1 at a specific position. In this case, the electromagnetic shut-off valve 30 is driven. Since the electromagnetic shut-off valve 30 is operated electronically, it can be operated at a remote place. When the electromagnetic shut-off valve 30 is driven, part of the hydraulic pressure supplied through the hydraulic pressure supply port 14 is transmitted to the first and second pilot check valves 33 and 33 'through the electromagnetic shut- do. Therefore, the first and second pilot check valves 33 and 33 'function as check valves, so that, for example, the fluid can flow in the direction of the actuator 1 but not vice versa do.

Thus, for example, the second pilot check valve 33 'blocks the flow of fluid from the actuator 1 to the directional control valve 20, and the directional control valve 20 is closed by the first The fluid can be supplied to the actuator 1 through the first pilot check valve 33 and the first manual valve 40 through the direction control valve line 25. [ However, since the flow of fluid to the outside of the actuator 1 through the second port 12 is blocked by the second pilot check valve 33 ', the driving rod 3 is stopped at a specific position So that the operation of another valve or the like driven by the actuator 1 can be brought into a specific state. Note that the same operation is performed in reverse. That is, the fluid is supplied to the actuator 1 through the second port 12 while preventing the fluid from escaping from the actuator 1 through the first port 11, so that the driving rod 3 is moved to a desired position As shown in Fig.

When maintenance of the directional control valve 20 or the electromagnetic shut-off valve 30 is required, the first handle 45 'of the first manual valve 40 and the second manual valve 50' The handle 55 'may be in the state shown in Fig. That is, it is rotated by 90 degrees in the state shown in Fig. 1 or Fig.

7, the first manual valve 40 does not flow the fluid supplied through the hydraulic pressure supply port 14 toward the directional control valve 20 but directly flows through the supply port 43, To the actuator 1 via the path inflow hole 48, the first inner flow path 46, the bypass outflow hole 48 'and the first port communication hole 44'.

In the state shown in FIG. 11, the second handle 55 'is rotated 90 degrees and the second body 55 is rotated 90 degrees. Accordingly, the second control valve line communication hole 54 is not communicated with the second control valve line communication portion 59, and the second port communication hole 54 'is also communicated with the second port communication portion 59' So that the fluid does not flow.

This results in the same result as when the electromagnetic shut-off valve 30 is driven from above, and the driving rod 3 of the actuator 1 is fixed at a specific position. When the apparatus of the present invention is used in a power generation facility, when the state of the actuator 1 is maintained in a state in which the power generation facility remains operating, the direction control valve 20, the electromagnetic shutoff valve 30, 10), there is no leakage of the fluid.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: Actuator 3: Drive rod
10: main body 11: first port
12: second port 14: hydraulic pressure supply port
16: Hydraulic recovery port 18:
19: Test port 20: Directional control valve
24: first inflow line 24 ': first withdrawal line
25: first direction control valve line 25 ': second direction control valve line
30: electron cutoff valve 31: second inflow line
31 ': second recovery line 32: pilot lot line
33: first pilot check valve 33 ': second pilot check valve
40: first manual valve 42: first housing
42 ': first internal space 43: supply port communicating hole
43 ': Inflow line communication hole 44: First control valve line communication hole
44 ': first port communicating hole 45: first body
45 ': first handle 46: first inner flow path
47: supply port communicating hole 47 ': inflow line communicating hole
48: Bypass Inlet Ball 48 ': Bypass Outlet Ball
49: first control valve line communicating portion 49 ': first port communicating portion
50: second manual valve 52: second housing
52 ': second internal space 54: second control valve line communicating hole
54 ': Second port communicating hole 55: Second body
55 ': second handle 59: second control valve line communication part
59 ': second port communicating portion

Claims (8)

A main body in which a fluid line is formed,
A direction control valve installed at one side of the main body to control supply and recovery of fluid to be supplied to the actuator,
An electromagnetic shutoff valve that is driven by receiving a part of the fluid supplied to the directional control valve,
First and second pilot check valves for controlling fluid flow between the directional control valve and the actuator by driving the electromagnetic shut-off valve,
A first manual valve for controlling the delivery of fluid from the fluid supply source to the actuator and delivering the fluid to the directional control valve or directly to the actuator,
And a second passive valve operative to block or connect fluid flow between the actuator and the directional control valve.
2. The apparatus as claimed in claim 1, wherein the first and second pilot check valves are adapted to freely hold fluid flow between the directional control valve and the actuator and to move the actuator from the actuator to the directional control valve A bypass / blocking device for replacing an actuator control valve to block fluid flow.
[3] The apparatus as claimed in claim 2, wherein the first passive valve comprises: a first housing having a first internal space formed therein; A first body installed in the space and adapted to switch the transmission direction by rotation; a first body installed on the first body protruding from the front end of the first housing and receiving a force for rotating the first body from the user, And an actuator control valve for controlling the actuator.
[5] The apparatus of claim 3, wherein the first body is provided with a first internal flow passage, a supply port communication hole communicating with the first internal flow passage and a predetermined angle interval, an inlet line communication hole, A first control valve line communicating part formed on the outer surface of the rear end of the first body and selectively connected to the direction control valve side, and a second control valve line communicating part selectively communicating with the actuator side, Wherein the first port communicating portion is formed over a predetermined section.
5. The apparatus of claim 4, wherein the first housing is formed with a supply port communication hole communicating with the bypass inlet hole or the supply port communication hole of the first body, and an inlet line communication hole communicating with the direction control valve side is formed And a first port communication hole selectively communicating with a first control valve line communication hole and a first port communication line selectively communicating with the first control valve line communication portion.
6. The fluid control device according to any one of claims 1 to 5, wherein the second passive valve comprises: a second housing having a second internal space formed therein; a second housing having a second fluid passageway for directing the fluid supplied from the fluid supply source to the actuator, A second body protruding from a tip of the second housing for transmitting a force for rotating the second body from a user to the second body, And a second handle for receiving an actuator control valve.
7. The air conditioner according to claim 6, wherein a second control valve line communication hole communicating with the direction control valve side is formed in the second housing in communication with the second internal space, and a second port communication hole communicating with the actuator side is formed in the second interior A bypass / blocking device for replacing an actuator control valve formed in communication with a space.
[8] The apparatus of claim 7, wherein the second body is formed with a second port communicating portion having a second control valve line communicating with the second control valve line communicating hole and selectively communicating with the second port communicating hole, Wherein the second control valve line communication portion and the second port communication portion are formed at positions opposite to each other on the outer surface of the second body so as to control the flow of the fluid by the rotation of the second body, Blocking device.

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